1 | /* |
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2 | * tclObj.c -- |
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3 | * |
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4 | * This file contains Tcl object-related functions that are used by many |
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5 | * Tcl commands. |
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6 | * |
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7 | * Copyright (c) 1995-1997 Sun Microsystems, Inc. |
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8 | * Copyright (c) 1999 by Scriptics Corporation. |
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9 | * Copyright (c) 2001 by ActiveState Corporation. |
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10 | * Copyright (c) 2005 by Kevin B. Kenny. All rights reserved. |
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11 | * Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net> |
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12 | * |
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13 | * See the file "license.terms" for information on usage and redistribution of |
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14 | * this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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15 | * |
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16 | * RCS: @(#) $Id: tclObj.c,v 1.139 2007/12/13 15:23:19 dgp Exp $ |
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17 | */ |
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18 | |
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19 | #include "tclInt.h" |
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20 | #include "tommath.h" |
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21 | #include <float.h> |
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22 | |
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23 | /* |
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24 | * Table of all object types. |
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25 | */ |
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26 | |
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27 | static Tcl_HashTable typeTable; |
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28 | static int typeTableInitialized = 0; /* 0 means not yet initialized. */ |
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29 | TCL_DECLARE_MUTEX(tableMutex) |
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30 | |
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31 | /* |
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32 | * Head of the list of free Tcl_Obj structs we maintain. |
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33 | */ |
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34 | |
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35 | Tcl_Obj *tclFreeObjList = NULL; |
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36 | |
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37 | /* |
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38 | * The object allocator is single threaded. This mutex is referenced by the |
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39 | * TclNewObj macro, however, so must be visible. |
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40 | */ |
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41 | |
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42 | #ifdef TCL_THREADS |
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43 | MODULE_SCOPE Tcl_Mutex tclObjMutex; |
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44 | Tcl_Mutex tclObjMutex; |
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45 | #endif |
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46 | |
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47 | /* |
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48 | * Pointer to a heap-allocated string of length zero that the Tcl core uses as |
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49 | * the value of an empty string representation for an object. This value is |
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50 | * shared by all new objects allocated by Tcl_NewObj. |
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51 | */ |
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52 | |
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53 | char tclEmptyString = '\0'; |
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54 | char *tclEmptyStringRep = &tclEmptyString; |
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55 | |
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56 | #if defined(TCL_MEM_DEBUG) && defined(TCL_THREADS) |
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57 | /* |
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58 | * Thread local table that is used to check that a Tcl_Obj was not allocated |
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59 | * by some other thread. |
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60 | */ |
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61 | typedef struct ThreadSpecificData { |
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62 | Tcl_HashTable *objThreadMap; |
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63 | } ThreadSpecificData; |
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64 | |
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65 | static Tcl_ThreadDataKey dataKey; |
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66 | #endif /* TCL_MEM_DEBUG && TCL_THREADS */ |
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67 | |
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68 | /* |
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69 | * Nested Tcl_Obj deletion management support |
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70 | * |
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71 | * All context references used in the object freeing code are pointers to this |
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72 | * structure; every thread will have its own structure instance. The purpose |
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73 | * of this structure is to allow deeply nested collections of Tcl_Objs to be |
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74 | * freed without taking a vast depth of C stack (which could cause all sorts |
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75 | * of breakage.) |
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76 | */ |
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77 | |
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78 | typedef struct PendingObjData { |
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79 | int deletionCount; /* Count of the number of invokations of |
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80 | * TclFreeObj() are on the stack (at least |
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81 | * conceptually; many are actually expanded |
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82 | * macros). */ |
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83 | Tcl_Obj *deletionStack; /* Stack of objects that have had TclFreeObj() |
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84 | * invoked upon them but which can't be |
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85 | * deleted yet because they are in a nested |
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86 | * invokation of TclFreeObj(). By postponing |
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87 | * this way, we limit the maximum overall C |
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88 | * stack depth when deleting a complex object. |
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89 | * The down-side is that we alter the overall |
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90 | * behaviour by altering the order in which |
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91 | * objects are deleted, and we change the |
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92 | * order in which the string rep and the |
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93 | * internal rep of an object are deleted. Note |
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94 | * that code which assumes the previous |
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95 | * behaviour in either of these respects is |
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96 | * unsafe anyway; it was never documented as |
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97 | * to exactly what would happen in these |
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98 | * cases, and the overall contract of a |
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99 | * user-level Tcl_DecrRefCount() is still |
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100 | * preserved (assuming that a particular T_DRC |
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101 | * would delete an object is not very |
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102 | * safe). */ |
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103 | } PendingObjData; |
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104 | |
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105 | /* |
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106 | * These are separated out so that some semantic content is attached |
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107 | * to them. |
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108 | */ |
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109 | #define ObjDeletionLock(contextPtr) ((contextPtr)->deletionCount++) |
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110 | #define ObjDeletionUnlock(contextPtr) ((contextPtr)->deletionCount--) |
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111 | #define ObjDeletePending(contextPtr) ((contextPtr)->deletionCount > 0) |
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112 | #define ObjOnStack(contextPtr) ((contextPtr)->deletionStack != NULL) |
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113 | #define PushObjToDelete(contextPtr,objPtr) \ |
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114 | /* The string rep is already invalidated so we can use the bytes value \ |
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115 | * for our pointer chain: push onto the head of the stack. */ \ |
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116 | (objPtr)->bytes = (char *) ((contextPtr)->deletionStack); \ |
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117 | (contextPtr)->deletionStack = (objPtr) |
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118 | #define PopObjToDelete(contextPtr,objPtrVar) \ |
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119 | (objPtrVar) = (contextPtr)->deletionStack; \ |
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120 | (contextPtr)->deletionStack = (Tcl_Obj *) (objPtrVar)->bytes |
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121 | |
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122 | /* |
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123 | * Macro to set up the local reference to the deletion context. |
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124 | */ |
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125 | #ifndef TCL_THREADS |
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126 | static PendingObjData pendingObjData; |
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127 | #define ObjInitDeletionContext(contextPtr) \ |
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128 | PendingObjData *CONST contextPtr = &pendingObjData |
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129 | #else |
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130 | static Tcl_ThreadDataKey pendingObjDataKey; |
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131 | #define ObjInitDeletionContext(contextPtr) \ |
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132 | PendingObjData *CONST contextPtr = (PendingObjData *) \ |
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133 | Tcl_GetThreadData(&pendingObjDataKey, sizeof(PendingObjData)) |
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134 | #endif |
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135 | |
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136 | /* |
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137 | * Macros to pack/unpack a bignum's fields in a Tcl_Obj internal rep |
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138 | */ |
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139 | |
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140 | #define PACK_BIGNUM(bignum, objPtr) \ |
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141 | if ((bignum).used > 0x7fff) { \ |
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142 | mp_int *temp = (void *) ckalloc((unsigned) sizeof(mp_int)); \ |
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143 | *temp = bignum; \ |
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144 | (objPtr)->internalRep.ptrAndLongRep.ptr = (void*) temp; \ |
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145 | (objPtr)->internalRep.ptrAndLongRep.value = (unsigned long)(-1); \ |
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146 | } else { \ |
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147 | if ((bignum).alloc > 0x7fff) { \ |
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148 | mp_shrink(&(bignum)); \ |
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149 | } \ |
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150 | (objPtr)->internalRep.ptrAndLongRep.ptr = (void*) (bignum).dp; \ |
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151 | (objPtr)->internalRep.ptrAndLongRep.value = ( ((bignum).sign << 30) \ |
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152 | | ((bignum).alloc << 15) | ((bignum).used)); \ |
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153 | } |
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154 | |
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155 | #define UNPACK_BIGNUM(objPtr, bignum) \ |
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156 | if ((objPtr)->internalRep.ptrAndLongRep.value == (unsigned long)(-1)) { \ |
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157 | (bignum) = *((mp_int *) ((objPtr)->internalRep.ptrAndLongRep.ptr)); \ |
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158 | } else { \ |
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159 | (bignum).dp = (mp_digit*) (objPtr)->internalRep.ptrAndLongRep.ptr; \ |
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160 | (bignum).sign = (objPtr)->internalRep.ptrAndLongRep.value >> 30; \ |
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161 | (bignum).alloc = \ |
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162 | ((objPtr)->internalRep.ptrAndLongRep.value >> 15) & 0x7fff; \ |
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163 | (bignum).used = (objPtr)->internalRep.ptrAndLongRep.value & 0x7fff; \ |
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164 | } |
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165 | |
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166 | /* |
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167 | * Prototypes for functions defined later in this file: |
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168 | */ |
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169 | |
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170 | static int ParseBoolean(Tcl_Obj *objPtr); |
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171 | static int SetBooleanFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); |
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172 | static int SetDoubleFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); |
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173 | static int SetIntFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); |
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174 | static void UpdateStringOfDouble(Tcl_Obj *objPtr); |
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175 | static void UpdateStringOfInt(Tcl_Obj *objPtr); |
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176 | #ifndef NO_WIDE_TYPE |
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177 | static void UpdateStringOfWideInt(Tcl_Obj *objPtr); |
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178 | static int SetWideIntFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); |
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179 | #endif |
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180 | static void FreeBignum(Tcl_Obj *objPtr); |
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181 | static void DupBignum(Tcl_Obj *objPtr, Tcl_Obj *copyPtr); |
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182 | static void UpdateStringOfBignum(Tcl_Obj *objPtr); |
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183 | static int GetBignumFromObj(Tcl_Interp *interp, Tcl_Obj *objPtr, |
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184 | int copy, mp_int *bignumValue); |
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185 | |
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186 | /* |
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187 | * Prototypes for the array hash key methods. |
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188 | */ |
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189 | |
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190 | static Tcl_HashEntry * AllocObjEntry(Tcl_HashTable *tablePtr, void *keyPtr); |
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191 | |
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192 | /* |
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193 | * Prototypes for the CommandName object type. |
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194 | */ |
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195 | |
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196 | static void DupCmdNameInternalRep(Tcl_Obj *objPtr, |
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197 | Tcl_Obj *copyPtr); |
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198 | static void FreeCmdNameInternalRep(Tcl_Obj *objPtr); |
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199 | static int SetCmdNameFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); |
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200 | |
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201 | /* |
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202 | * The structures below defines the Tcl object types defined in this file by |
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203 | * means of functions that can be invoked by generic object code. See also |
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204 | * tclStringObj.c, tclListObj.c, tclByteCode.c for other type manager |
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205 | * implementations. |
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206 | */ |
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207 | |
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208 | static Tcl_ObjType oldBooleanType = { |
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209 | "boolean", /* name */ |
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210 | NULL, /* freeIntRepProc */ |
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211 | NULL, /* dupIntRepProc */ |
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212 | NULL, /* updateStringProc */ |
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213 | SetBooleanFromAny /* setFromAnyProc */ |
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214 | }; |
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215 | Tcl_ObjType tclBooleanType = { |
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216 | "booleanString", /* name */ |
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217 | NULL, /* freeIntRepProc */ |
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218 | NULL, /* dupIntRepProc */ |
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219 | NULL, /* updateStringProc */ |
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220 | SetBooleanFromAny /* setFromAnyProc */ |
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221 | }; |
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222 | Tcl_ObjType tclDoubleType = { |
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223 | "double", /* name */ |
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224 | NULL, /* freeIntRepProc */ |
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225 | NULL, /* dupIntRepProc */ |
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226 | UpdateStringOfDouble, /* updateStringProc */ |
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227 | SetDoubleFromAny /* setFromAnyProc */ |
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228 | }; |
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229 | Tcl_ObjType tclIntType = { |
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230 | "int", /* name */ |
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231 | NULL, /* freeIntRepProc */ |
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232 | NULL, /* dupIntRepProc */ |
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233 | UpdateStringOfInt, /* updateStringProc */ |
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234 | SetIntFromAny /* setFromAnyProc */ |
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235 | }; |
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236 | #ifndef NO_WIDE_TYPE |
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237 | Tcl_ObjType tclWideIntType = { |
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238 | "wideInt", /* name */ |
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239 | NULL, /* freeIntRepProc */ |
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240 | NULL, /* dupIntRepProc */ |
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241 | UpdateStringOfWideInt, /* updateStringProc */ |
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242 | SetWideIntFromAny /* setFromAnyProc */ |
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243 | }; |
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244 | #endif |
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245 | Tcl_ObjType tclBignumType = { |
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246 | "bignum", /* name */ |
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247 | FreeBignum, /* freeIntRepProc */ |
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248 | DupBignum, /* dupIntRepProc */ |
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249 | UpdateStringOfBignum, /* updateStringProc */ |
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250 | NULL /* setFromAnyProc */ |
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251 | }; |
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252 | |
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253 | /* |
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254 | * The structure below defines the Tcl obj hash key type. |
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255 | */ |
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256 | |
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257 | Tcl_HashKeyType tclObjHashKeyType = { |
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258 | TCL_HASH_KEY_TYPE_VERSION, /* version */ |
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259 | 0, /* flags */ |
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260 | TclHashObjKey, /* hashKeyProc */ |
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261 | TclCompareObjKeys, /* compareKeysProc */ |
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262 | AllocObjEntry, /* allocEntryProc */ |
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263 | TclFreeObjEntry /* freeEntryProc */ |
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264 | }; |
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265 | |
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266 | /* |
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267 | * The structure below defines the command name Tcl object type by means of |
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268 | * functions that can be invoked by generic object code. Objects of this type |
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269 | * cache the Command pointer that results from looking up command names in the |
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270 | * command hashtable. Such objects appear as the zeroth ("command name") |
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271 | * argument in a Tcl command. |
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272 | * |
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273 | * NOTE: the ResolvedCmdName that gets cached is stored in the |
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274 | * twoPtrValue.ptr1 field, and the twoPtrValue.ptr2 field is unused. You might |
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275 | * think you could use the simpler otherValuePtr field to store the single |
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276 | * ResolvedCmdName pointer, but DO NOT DO THIS. It seems that some extensions |
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277 | * use the second internal pointer field of the twoPtrValue field for their |
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278 | * own purposes. |
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279 | */ |
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280 | |
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281 | static Tcl_ObjType tclCmdNameType = { |
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282 | "cmdName", /* name */ |
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283 | FreeCmdNameInternalRep, /* freeIntRepProc */ |
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284 | DupCmdNameInternalRep, /* dupIntRepProc */ |
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285 | NULL, /* updateStringProc */ |
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286 | SetCmdNameFromAny /* setFromAnyProc */ |
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287 | }; |
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288 | |
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289 | /* |
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290 | * Structure containing a cached pointer to a command that is the result of |
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291 | * resolving the command's name in some namespace. It is the internal |
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292 | * representation for a cmdName object. It contains the pointer along with |
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293 | * some information that is used to check the pointer's validity. |
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294 | */ |
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295 | |
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296 | typedef struct ResolvedCmdName { |
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297 | Command *cmdPtr; /* A cached Command pointer. */ |
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298 | Namespace *refNsPtr; /* Points to the namespace containing the |
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299 | * reference (not the namespace that contains |
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300 | * the referenced command). NULL if the name |
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301 | * is fully qualified.*/ |
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302 | long refNsId; /* refNsPtr's unique namespace id. Used to |
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303 | * verify that refNsPtr is still valid (e.g., |
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304 | * it's possible that the cmd's containing |
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305 | * namespace was deleted and a new one created |
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306 | * at the same address). */ |
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307 | int refNsCmdEpoch; /* Value of the referencing namespace's |
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308 | * cmdRefEpoch when the pointer was cached. |
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309 | * Before using the cached pointer, we check |
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310 | * if the namespace's epoch was incremented; |
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311 | * if so, this cached pointer is invalid. */ |
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312 | int cmdEpoch; /* Value of the command's cmdEpoch when this |
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313 | * pointer was cached. Before using the cached |
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314 | * pointer, we check if the cmd's epoch was |
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315 | * incremented; if so, the cmd was renamed, |
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316 | * deleted, hidden, or exposed, and so the |
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317 | * pointer is invalid. */ |
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318 | int refCount; /* Reference count: 1 for each cmdName object |
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319 | * that has a pointer to this ResolvedCmdName |
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320 | * structure as its internal rep. This |
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321 | * structure can be freed when refCount |
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322 | * becomes zero. */ |
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323 | } ResolvedCmdName; |
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324 | |
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325 | /* |
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326 | *------------------------------------------------------------------------- |
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327 | * |
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328 | * TclInitObjectSubsystem -- |
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329 | * |
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330 | * This function is invoked to perform once-only initialization of the |
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331 | * type table. It also registers the object types defined in this file. |
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332 | * |
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333 | * Results: |
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334 | * None. |
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335 | * |
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336 | * Side effects: |
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337 | * Initializes the table of defined object types "typeTable" with builtin |
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338 | * object types defined in this file. |
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339 | * |
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340 | *------------------------------------------------------------------------- |
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341 | */ |
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342 | |
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343 | void |
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344 | TclInitObjSubsystem(void) |
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345 | { |
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346 | Tcl_MutexLock(&tableMutex); |
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347 | typeTableInitialized = 1; |
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348 | Tcl_InitHashTable(&typeTable, TCL_STRING_KEYS); |
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349 | Tcl_MutexUnlock(&tableMutex); |
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350 | |
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351 | Tcl_RegisterObjType(&tclByteArrayType); |
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352 | Tcl_RegisterObjType(&tclDoubleType); |
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353 | Tcl_RegisterObjType(&tclEndOffsetType); |
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354 | Tcl_RegisterObjType(&tclIntType); |
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355 | Tcl_RegisterObjType(&tclStringType); |
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356 | Tcl_RegisterObjType(&tclListType); |
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357 | Tcl_RegisterObjType(&tclDictType); |
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358 | Tcl_RegisterObjType(&tclByteCodeType); |
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359 | Tcl_RegisterObjType(&tclArraySearchType); |
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360 | Tcl_RegisterObjType(&tclCmdNameType); |
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361 | Tcl_RegisterObjType(&tclRegexpType); |
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362 | Tcl_RegisterObjType(&tclProcBodyType); |
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363 | |
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364 | /* For backward compatibility only ... */ |
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365 | Tcl_RegisterObjType(&oldBooleanType); |
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366 | #ifndef NO_WIDE_TYPE |
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367 | Tcl_RegisterObjType(&tclWideIntType); |
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368 | #endif |
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369 | |
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370 | #ifdef TCL_COMPILE_STATS |
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371 | Tcl_MutexLock(&tclObjMutex); |
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372 | tclObjsAlloced = 0; |
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373 | tclObjsFreed = 0; |
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374 | { |
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375 | int i; |
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376 | for (i=0 ; i<TCL_MAX_SHARED_OBJ_STATS ; i++) { |
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377 | tclObjsShared[i] = 0; |
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378 | } |
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379 | } |
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380 | Tcl_MutexUnlock(&tclObjMutex); |
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381 | #endif |
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382 | } |
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383 | |
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384 | /* |
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385 | *---------------------------------------------------------------------- |
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386 | * |
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387 | * TclFinalizeObjects -- |
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388 | * |
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389 | * This function is called by Tcl_Finalize to clean up all registered |
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390 | * Tcl_ObjType's and to reset the tclFreeObjList. |
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391 | * |
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392 | * Results: |
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393 | * None. |
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394 | * |
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395 | * Side effects: |
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396 | * None. |
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397 | * |
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398 | *---------------------------------------------------------------------- |
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399 | */ |
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400 | |
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401 | void |
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402 | TclFinalizeObjects(void) |
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403 | { |
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404 | Tcl_MutexLock(&tableMutex); |
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405 | if (typeTableInitialized) { |
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406 | Tcl_DeleteHashTable(&typeTable); |
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407 | typeTableInitialized = 0; |
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408 | } |
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409 | Tcl_MutexUnlock(&tableMutex); |
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410 | |
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411 | /* |
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412 | * All we do here is reset the head pointer of the linked list of free |
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413 | * Tcl_Obj's to NULL; the memory finalization will take care of releasing |
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414 | * memory for us. |
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415 | */ |
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416 | Tcl_MutexLock(&tclObjMutex); |
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417 | tclFreeObjList = NULL; |
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418 | Tcl_MutexUnlock(&tclObjMutex); |
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419 | } |
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420 | |
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421 | /* |
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422 | *-------------------------------------------------------------- |
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423 | * |
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424 | * Tcl_RegisterObjType -- |
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425 | * |
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426 | * This function is called to register a new Tcl object type in the table |
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427 | * of all object types supported by Tcl. |
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428 | * |
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429 | * Results: |
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430 | * None. |
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431 | * |
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432 | * Side effects: |
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433 | * The type is registered in the Tcl type table. If there was already a |
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434 | * type with the same name as in typePtr, it is replaced with the new |
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435 | * type. |
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436 | * |
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437 | *-------------------------------------------------------------- |
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438 | */ |
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439 | |
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440 | void |
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441 | Tcl_RegisterObjType( |
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442 | Tcl_ObjType *typePtr) /* Information about object type; storage must |
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443 | * be statically allocated (must live |
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444 | * forever). */ |
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445 | { |
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446 | int isNew; |
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447 | |
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448 | Tcl_MutexLock(&tableMutex); |
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449 | Tcl_SetHashValue( |
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450 | Tcl_CreateHashEntry(&typeTable, typePtr->name, &isNew), typePtr); |
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451 | Tcl_MutexUnlock(&tableMutex); |
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452 | } |
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453 | |
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454 | /* |
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455 | *---------------------------------------------------------------------- |
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456 | * |
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457 | * Tcl_AppendAllObjTypes -- |
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458 | * |
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459 | * This function appends onto the argument object the name of each object |
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460 | * type as a list element. This includes the builtin object types (e.g. |
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461 | * int, list) as well as those added using Tcl_NewObj. These names can be |
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462 | * used, for example, with Tcl_GetObjType to get pointers to the |
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463 | * corresponding Tcl_ObjType structures. |
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464 | * |
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465 | * Results: |
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466 | * The return value is normally TCL_OK; in this case the object |
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467 | * referenced by objPtr has each type name appended to it. If an error |
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468 | * occurs, TCL_ERROR is returned and the interpreter's result holds an |
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469 | * error message. |
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470 | * |
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471 | * Side effects: |
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472 | * If necessary, the object referenced by objPtr is converted into a list |
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473 | * object. |
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474 | * |
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475 | *---------------------------------------------------------------------- |
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476 | */ |
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477 | |
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478 | int |
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479 | Tcl_AppendAllObjTypes( |
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480 | Tcl_Interp *interp, /* Interpreter used for error reporting. */ |
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481 | Tcl_Obj *objPtr) /* Points to the Tcl object onto which the |
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482 | * name of each registered type is appended as |
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483 | * a list element. */ |
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484 | { |
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485 | register Tcl_HashEntry *hPtr; |
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486 | Tcl_HashSearch search; |
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487 | int numElems; |
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488 | |
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489 | /* |
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490 | * Get the test for a valid list out of the way first. |
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491 | */ |
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492 | |
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493 | if (TclListObjLength(interp, objPtr, &numElems) != TCL_OK) { |
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494 | return TCL_ERROR; |
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495 | } |
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496 | |
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497 | /* |
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498 | * Type names are NUL-terminated, not counted strings. This code relies on |
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499 | * that. |
---|
500 | */ |
---|
501 | |
---|
502 | Tcl_MutexLock(&tableMutex); |
---|
503 | for (hPtr = Tcl_FirstHashEntry(&typeTable, &search); |
---|
504 | hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { |
---|
505 | Tcl_ListObjAppendElement(NULL, objPtr, |
---|
506 | Tcl_NewStringObj(Tcl_GetHashKey(&typeTable, hPtr), -1)); |
---|
507 | } |
---|
508 | Tcl_MutexUnlock(&tableMutex); |
---|
509 | return TCL_OK; |
---|
510 | } |
---|
511 | |
---|
512 | /* |
---|
513 | *---------------------------------------------------------------------- |
---|
514 | * |
---|
515 | * Tcl_GetObjType -- |
---|
516 | * |
---|
517 | * This function looks up an object type by name. |
---|
518 | * |
---|
519 | * Results: |
---|
520 | * If an object type with name matching "typeName" is found, a pointer to |
---|
521 | * its Tcl_ObjType structure is returned; otherwise, NULL is returned. |
---|
522 | * |
---|
523 | * Side effects: |
---|
524 | * None. |
---|
525 | * |
---|
526 | *---------------------------------------------------------------------- |
---|
527 | */ |
---|
528 | |
---|
529 | Tcl_ObjType * |
---|
530 | Tcl_GetObjType( |
---|
531 | CONST char *typeName) /* Name of Tcl object type to look up. */ |
---|
532 | { |
---|
533 | register Tcl_HashEntry *hPtr; |
---|
534 | Tcl_ObjType *typePtr = NULL; |
---|
535 | |
---|
536 | Tcl_MutexLock(&tableMutex); |
---|
537 | hPtr = Tcl_FindHashEntry(&typeTable, typeName); |
---|
538 | if (hPtr != NULL) { |
---|
539 | typePtr = (Tcl_ObjType *) Tcl_GetHashValue(hPtr); |
---|
540 | } |
---|
541 | Tcl_MutexUnlock(&tableMutex); |
---|
542 | return typePtr; |
---|
543 | } |
---|
544 | |
---|
545 | /* |
---|
546 | *---------------------------------------------------------------------- |
---|
547 | * |
---|
548 | * Tcl_ConvertToType -- |
---|
549 | * |
---|
550 | * Convert the Tcl object "objPtr" to have type "typePtr" if possible. |
---|
551 | * |
---|
552 | * Results: |
---|
553 | * The return value is TCL_OK on success and TCL_ERROR on failure. If |
---|
554 | * TCL_ERROR is returned, then the interpreter's result contains an error |
---|
555 | * message unless "interp" is NULL. Passing a NULL "interp" allows this |
---|
556 | * function to be used as a test whether the conversion could be done |
---|
557 | * (and in fact was done). |
---|
558 | * |
---|
559 | * Side effects: |
---|
560 | * Any internal representation for the old type is freed. |
---|
561 | * |
---|
562 | *---------------------------------------------------------------------- |
---|
563 | */ |
---|
564 | |
---|
565 | int |
---|
566 | Tcl_ConvertToType( |
---|
567 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
568 | Tcl_Obj *objPtr, /* The object to convert. */ |
---|
569 | Tcl_ObjType *typePtr) /* The target type. */ |
---|
570 | { |
---|
571 | if (objPtr->typePtr == typePtr) { |
---|
572 | return TCL_OK; |
---|
573 | } |
---|
574 | |
---|
575 | /* |
---|
576 | * Use the target type's Tcl_SetFromAnyProc to set "objPtr"s internal form |
---|
577 | * as appropriate for the target type. This frees the old internal |
---|
578 | * representation. |
---|
579 | */ |
---|
580 | |
---|
581 | if (typePtr->setFromAnyProc == NULL) { |
---|
582 | Tcl_Panic("may not convert object to type %s", typePtr->name); |
---|
583 | } |
---|
584 | |
---|
585 | return typePtr->setFromAnyProc(interp, objPtr); |
---|
586 | } |
---|
587 | |
---|
588 | /* |
---|
589 | *---------------------------------------------------------------------- |
---|
590 | * |
---|
591 | * TclDbInitNewObj -- |
---|
592 | * |
---|
593 | * Called via the TclNewObj or TclDbNewObj macros when TCL_MEM_DEBUG is |
---|
594 | * enabled. This function will initialize the members of a Tcl_Obj |
---|
595 | * struct. Initilization would be done inline via the TclNewObj macro |
---|
596 | * when compiling without TCL_MEM_DEBUG. |
---|
597 | * |
---|
598 | * Results: |
---|
599 | * The Tcl_Obj struct members are initialized. |
---|
600 | * |
---|
601 | * Side effects: |
---|
602 | * None. |
---|
603 | *---------------------------------------------------------------------- |
---|
604 | */ |
---|
605 | |
---|
606 | #ifdef TCL_MEM_DEBUG |
---|
607 | void |
---|
608 | TclDbInitNewObj( |
---|
609 | register Tcl_Obj *objPtr) |
---|
610 | { |
---|
611 | objPtr->refCount = 0; |
---|
612 | objPtr->bytes = tclEmptyStringRep; |
---|
613 | objPtr->length = 0; |
---|
614 | objPtr->typePtr = NULL; |
---|
615 | |
---|
616 | #ifdef TCL_THREADS |
---|
617 | /* |
---|
618 | * Add entry to a thread local map used to check if a Tcl_Obj was |
---|
619 | * allocated by the currently executing thread. |
---|
620 | */ |
---|
621 | |
---|
622 | if (!TclInExit()) { |
---|
623 | Tcl_HashEntry *hPtr; |
---|
624 | Tcl_HashTable *tablePtr; |
---|
625 | int isNew; |
---|
626 | ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); |
---|
627 | |
---|
628 | if (tsdPtr->objThreadMap == NULL) { |
---|
629 | tsdPtr->objThreadMap = (Tcl_HashTable *) |
---|
630 | ckalloc(sizeof(Tcl_HashTable)); |
---|
631 | Tcl_InitHashTable(tsdPtr->objThreadMap, TCL_ONE_WORD_KEYS); |
---|
632 | } |
---|
633 | tablePtr = tsdPtr->objThreadMap; |
---|
634 | hPtr = Tcl_CreateHashEntry(tablePtr, (char *) objPtr, &isNew); |
---|
635 | if (!isNew) { |
---|
636 | Tcl_Panic("expected to create new entry for object map"); |
---|
637 | } |
---|
638 | Tcl_SetHashValue(hPtr, NULL); |
---|
639 | } |
---|
640 | #endif /* TCL_THREADS */ |
---|
641 | } |
---|
642 | #endif /* TCL_MEM_DEBUG */ |
---|
643 | |
---|
644 | /* |
---|
645 | *---------------------------------------------------------------------- |
---|
646 | * |
---|
647 | * Tcl_NewObj -- |
---|
648 | * |
---|
649 | * This function is normally called when not debugging: i.e., when |
---|
650 | * TCL_MEM_DEBUG is not defined. It creates new Tcl objects that denote |
---|
651 | * the empty string. These objects have a NULL object type and NULL |
---|
652 | * string representation byte pointer. Type managers call this routine to |
---|
653 | * allocate new objects that they further initialize. |
---|
654 | * |
---|
655 | * When TCL_MEM_DEBUG is defined, this function just returns the result |
---|
656 | * of calling the debugging version Tcl_DbNewObj. |
---|
657 | * |
---|
658 | * Results: |
---|
659 | * The result is a newly allocated object that represents the empty |
---|
660 | * string. The new object's typePtr is set NULL and its ref count is set |
---|
661 | * to 0. |
---|
662 | * |
---|
663 | * Side effects: |
---|
664 | * If compiling with TCL_COMPILE_STATS, this function increments the |
---|
665 | * global count of allocated objects (tclObjsAlloced). |
---|
666 | * |
---|
667 | *---------------------------------------------------------------------- |
---|
668 | */ |
---|
669 | |
---|
670 | #ifdef TCL_MEM_DEBUG |
---|
671 | #undef Tcl_NewObj |
---|
672 | |
---|
673 | Tcl_Obj * |
---|
674 | Tcl_NewObj(void) |
---|
675 | { |
---|
676 | return Tcl_DbNewObj("unknown", 0); |
---|
677 | } |
---|
678 | |
---|
679 | #else /* if not TCL_MEM_DEBUG */ |
---|
680 | |
---|
681 | Tcl_Obj * |
---|
682 | Tcl_NewObj(void) |
---|
683 | { |
---|
684 | register Tcl_Obj *objPtr; |
---|
685 | |
---|
686 | /* |
---|
687 | * Use the macro defined in tclInt.h - it will use the correct allocator. |
---|
688 | */ |
---|
689 | |
---|
690 | TclNewObj(objPtr); |
---|
691 | return objPtr; |
---|
692 | } |
---|
693 | #endif /* TCL_MEM_DEBUG */ |
---|
694 | |
---|
695 | /* |
---|
696 | *---------------------------------------------------------------------- |
---|
697 | * |
---|
698 | * Tcl_DbNewObj -- |
---|
699 | * |
---|
700 | * This function is normally called when debugging: i.e., when |
---|
701 | * TCL_MEM_DEBUG is defined. It creates new Tcl objects that denote the |
---|
702 | * empty string. It is the same as the Tcl_NewObj function above except |
---|
703 | * that it calls Tcl_DbCkalloc directly with the file name and line |
---|
704 | * number from its caller. This simplifies debugging since then the |
---|
705 | * [memory active] command will report the correct file name and line |
---|
706 | * number when reporting objects that haven't been freed. |
---|
707 | * |
---|
708 | * When TCL_MEM_DEBUG is not defined, this function just returns the |
---|
709 | * result of calling Tcl_NewObj. |
---|
710 | * |
---|
711 | * Results: |
---|
712 | * The result is a newly allocated that represents the empty string. The |
---|
713 | * new object's typePtr is set NULL and its ref count is set to 0. |
---|
714 | * |
---|
715 | * Side effects: |
---|
716 | * If compiling with TCL_COMPILE_STATS, this function increments the |
---|
717 | * global count of allocated objects (tclObjsAlloced). |
---|
718 | * |
---|
719 | *---------------------------------------------------------------------- |
---|
720 | */ |
---|
721 | |
---|
722 | #ifdef TCL_MEM_DEBUG |
---|
723 | |
---|
724 | Tcl_Obj * |
---|
725 | Tcl_DbNewObj( |
---|
726 | register CONST char *file, /* The name of the source file calling this |
---|
727 | * function; used for debugging. */ |
---|
728 | register int line) /* Line number in the source file; used for |
---|
729 | * debugging. */ |
---|
730 | { |
---|
731 | register Tcl_Obj *objPtr; |
---|
732 | |
---|
733 | /* |
---|
734 | * Use the macro defined in tclInt.h - it will use the correct allocator. |
---|
735 | */ |
---|
736 | |
---|
737 | TclDbNewObj(objPtr, file, line); |
---|
738 | return objPtr; |
---|
739 | } |
---|
740 | #else /* if not TCL_MEM_DEBUG */ |
---|
741 | |
---|
742 | Tcl_Obj * |
---|
743 | Tcl_DbNewObj( |
---|
744 | CONST char *file, /* The name of the source file calling this |
---|
745 | * function; used for debugging. */ |
---|
746 | int line) /* Line number in the source file; used for |
---|
747 | * debugging. */ |
---|
748 | { |
---|
749 | return Tcl_NewObj(); |
---|
750 | } |
---|
751 | #endif /* TCL_MEM_DEBUG */ |
---|
752 | |
---|
753 | /* |
---|
754 | *---------------------------------------------------------------------- |
---|
755 | * |
---|
756 | * TclAllocateFreeObjects -- |
---|
757 | * |
---|
758 | * Function to allocate a number of free Tcl_Objs. This is done using a |
---|
759 | * single ckalloc to reduce the overhead for Tcl_Obj allocation. |
---|
760 | * |
---|
761 | * Assumes mutex is held. |
---|
762 | * |
---|
763 | * Results: |
---|
764 | * None. |
---|
765 | * |
---|
766 | * Side effects: |
---|
767 | * tclFreeObjList, the head of the list of free Tcl_Objs, is set to the |
---|
768 | * first of a number of free Tcl_Obj's linked together by their |
---|
769 | * internalRep.otherValuePtrs. |
---|
770 | * |
---|
771 | *---------------------------------------------------------------------- |
---|
772 | */ |
---|
773 | |
---|
774 | #define OBJS_TO_ALLOC_EACH_TIME 100 |
---|
775 | |
---|
776 | void |
---|
777 | TclAllocateFreeObjects(void) |
---|
778 | { |
---|
779 | size_t bytesToAlloc = (OBJS_TO_ALLOC_EACH_TIME * sizeof(Tcl_Obj)); |
---|
780 | char *basePtr; |
---|
781 | register Tcl_Obj *prevPtr, *objPtr; |
---|
782 | register int i; |
---|
783 | |
---|
784 | /* |
---|
785 | * This has been noted by Purify to be a potential leak. The problem is |
---|
786 | * that Tcl, when not TCL_MEM_DEBUG compiled, keeps around all allocated |
---|
787 | * Tcl_Obj's, pointed to by tclFreeObjList, when freed instead of actually |
---|
788 | * freeing the memory. TclFinalizeObjects() does not ckfree() this memory, |
---|
789 | * but leaves it to Tcl's memory subsystem finalization to release it. |
---|
790 | * Purify apparently can't figure that out, and fires a false alarm. |
---|
791 | */ |
---|
792 | |
---|
793 | basePtr = (char *) ckalloc(bytesToAlloc); |
---|
794 | |
---|
795 | prevPtr = NULL; |
---|
796 | objPtr = (Tcl_Obj *) basePtr; |
---|
797 | for (i = 0; i < OBJS_TO_ALLOC_EACH_TIME; i++) { |
---|
798 | objPtr->internalRep.otherValuePtr = (void *) prevPtr; |
---|
799 | prevPtr = objPtr; |
---|
800 | objPtr++; |
---|
801 | } |
---|
802 | tclFreeObjList = prevPtr; |
---|
803 | } |
---|
804 | #undef OBJS_TO_ALLOC_EACH_TIME |
---|
805 | |
---|
806 | /* |
---|
807 | *---------------------------------------------------------------------- |
---|
808 | * |
---|
809 | * TclFreeObj -- |
---|
810 | * |
---|
811 | * This function frees the memory associated with the argument object. |
---|
812 | * It is called by the tcl.h macro Tcl_DecrRefCount when an object's ref |
---|
813 | * count is zero. It is only "public" since it must be callable by that |
---|
814 | * macro wherever the macro is used. It should not be directly called by |
---|
815 | * clients. |
---|
816 | * |
---|
817 | * Results: |
---|
818 | * None. |
---|
819 | * |
---|
820 | * Side effects: |
---|
821 | * Deallocates the storage for the object's Tcl_Obj structure after |
---|
822 | * deallocating the string representation and calling the type-specific |
---|
823 | * Tcl_FreeInternalRepProc to deallocate the object's internal |
---|
824 | * representation. If compiling with TCL_COMPILE_STATS, this function |
---|
825 | * increments the global count of freed objects (tclObjsFreed). |
---|
826 | * |
---|
827 | *---------------------------------------------------------------------- |
---|
828 | */ |
---|
829 | |
---|
830 | #ifdef TCL_MEM_DEBUG |
---|
831 | void |
---|
832 | TclFreeObj( |
---|
833 | register Tcl_Obj *objPtr) /* The object to be freed. */ |
---|
834 | { |
---|
835 | register Tcl_ObjType *typePtr = objPtr->typePtr; |
---|
836 | |
---|
837 | /* |
---|
838 | * This macro declares a variable, so must come here... |
---|
839 | */ |
---|
840 | |
---|
841 | ObjInitDeletionContext(context); |
---|
842 | |
---|
843 | if (objPtr->refCount < -1) { |
---|
844 | Tcl_Panic("Reference count for %lx was negative", objPtr); |
---|
845 | } |
---|
846 | |
---|
847 | /* Invalidate the string rep first so we can use the bytes value |
---|
848 | * for our pointer chain, and signal an obj deletion (as opposed |
---|
849 | * to shimmering) with 'length == -1' */ |
---|
850 | |
---|
851 | TclInvalidateStringRep(objPtr); |
---|
852 | objPtr->length = -1; |
---|
853 | |
---|
854 | if (ObjDeletePending(context)) { |
---|
855 | PushObjToDelete(context, objPtr); |
---|
856 | } else { |
---|
857 | TCL_DTRACE_OBJ_FREE(objPtr); |
---|
858 | if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) { |
---|
859 | ObjDeletionLock(context); |
---|
860 | typePtr->freeIntRepProc(objPtr); |
---|
861 | ObjDeletionUnlock(context); |
---|
862 | } |
---|
863 | |
---|
864 | Tcl_MutexLock(&tclObjMutex); |
---|
865 | ckfree((char *) objPtr); |
---|
866 | Tcl_MutexUnlock(&tclObjMutex); |
---|
867 | TclIncrObjsFreed(); |
---|
868 | ObjDeletionLock(context); |
---|
869 | while (ObjOnStack(context)) { |
---|
870 | Tcl_Obj *objToFree; |
---|
871 | |
---|
872 | PopObjToDelete(context,objToFree); |
---|
873 | TCL_DTRACE_OBJ_FREE(objToFree); |
---|
874 | TclFreeIntRep(objToFree); |
---|
875 | |
---|
876 | Tcl_MutexLock(&tclObjMutex); |
---|
877 | ckfree((char *) objToFree); |
---|
878 | Tcl_MutexUnlock(&tclObjMutex); |
---|
879 | TclIncrObjsFreed(); |
---|
880 | } |
---|
881 | ObjDeletionUnlock(context); |
---|
882 | } |
---|
883 | } |
---|
884 | #else /* TCL_MEM_DEBUG */ |
---|
885 | |
---|
886 | void |
---|
887 | TclFreeObj( |
---|
888 | register Tcl_Obj *objPtr) /* The object to be freed. */ |
---|
889 | { |
---|
890 | /* Invalidate the string rep first so we can use the bytes value |
---|
891 | * for our pointer chain, and signal an obj deletion (as opposed |
---|
892 | * to shimmering) with 'length == -1' */ |
---|
893 | |
---|
894 | TclInvalidateStringRep(objPtr); |
---|
895 | objPtr->length = -1; |
---|
896 | |
---|
897 | if (!objPtr->typePtr || !objPtr->typePtr->freeIntRepProc) { |
---|
898 | /* |
---|
899 | * objPtr can be freed safely, as it will not attempt to free any |
---|
900 | * other objects: it will not cause recursive calls to this function. |
---|
901 | */ |
---|
902 | |
---|
903 | TCL_DTRACE_OBJ_FREE(objPtr); |
---|
904 | TclFreeObjStorage(objPtr); |
---|
905 | TclIncrObjsFreed(); |
---|
906 | } else { |
---|
907 | /* |
---|
908 | * This macro declares a variable, so must come here... |
---|
909 | */ |
---|
910 | |
---|
911 | ObjInitDeletionContext(context); |
---|
912 | |
---|
913 | if (ObjDeletePending(context)) { |
---|
914 | PushObjToDelete(context, objPtr); |
---|
915 | } else { |
---|
916 | /* |
---|
917 | * Note that the contents of the while loop assume that the string |
---|
918 | * rep has already been freed and we don't want to do anything |
---|
919 | * fancy with adding to the queue inside ourselves. Must take care |
---|
920 | * to unstack the object first since freeing the internal rep can |
---|
921 | * add further objects to the stack. The code assumes that it is |
---|
922 | * the first thing in a block; all current usages in the core |
---|
923 | * satisfy this. |
---|
924 | */ |
---|
925 | |
---|
926 | TCL_DTRACE_OBJ_FREE(objPtr); |
---|
927 | ObjDeletionLock(context); |
---|
928 | objPtr->typePtr->freeIntRepProc(objPtr); |
---|
929 | ObjDeletionUnlock(context); |
---|
930 | |
---|
931 | TclFreeObjStorage(objPtr); |
---|
932 | TclIncrObjsFreed(); |
---|
933 | ObjDeletionLock(context); |
---|
934 | while (ObjOnStack(context)) { |
---|
935 | Tcl_Obj *objToFree; |
---|
936 | PopObjToDelete(context,objToFree); |
---|
937 | TCL_DTRACE_OBJ_FREE(objToFree); |
---|
938 | if ((objToFree->typePtr != NULL) |
---|
939 | && (objToFree->typePtr->freeIntRepProc != NULL)) { |
---|
940 | objToFree->typePtr->freeIntRepProc(objToFree); |
---|
941 | } |
---|
942 | TclFreeObjStorage(objToFree); |
---|
943 | TclIncrObjsFreed(); |
---|
944 | } |
---|
945 | ObjDeletionUnlock(context); |
---|
946 | } |
---|
947 | } |
---|
948 | } |
---|
949 | #endif |
---|
950 | |
---|
951 | /* |
---|
952 | *---------------------------------------------------------------------- |
---|
953 | * |
---|
954 | * TclObjBeingDeleted -- |
---|
955 | * |
---|
956 | * This function returns 1 when the Tcl_Obj is being deleted. It is |
---|
957 | * provided for the rare cases where the reason for the loss of an |
---|
958 | * internal rep might be relevant. [FR 1512138] |
---|
959 | * |
---|
960 | * Results: |
---|
961 | * 1 if being deleted, 0 otherwise. |
---|
962 | * |
---|
963 | * Side effects: |
---|
964 | * None. |
---|
965 | * |
---|
966 | *---------------------------------------------------------------------- |
---|
967 | */ |
---|
968 | |
---|
969 | int |
---|
970 | TclObjBeingDeleted( |
---|
971 | Tcl_Obj *objPtr) |
---|
972 | { |
---|
973 | return (objPtr->length == -1); |
---|
974 | } |
---|
975 | |
---|
976 | |
---|
977 | /* |
---|
978 | *---------------------------------------------------------------------- |
---|
979 | * |
---|
980 | * Tcl_DuplicateObj -- |
---|
981 | * |
---|
982 | * Create and return a new object that is a duplicate of the argument |
---|
983 | * object. |
---|
984 | * |
---|
985 | * Results: |
---|
986 | * The return value is a pointer to a newly created Tcl_Obj. This object |
---|
987 | * has reference count 0 and the same type, if any, as the source object |
---|
988 | * objPtr. Also: |
---|
989 | * 1) If the source object has a valid string rep, we copy it; |
---|
990 | * otherwise, the duplicate's string rep is set NULL to mark it |
---|
991 | * invalid. |
---|
992 | * 2) If the source object has an internal representation (i.e. its |
---|
993 | * typePtr is non-NULL), the new object's internal rep is set to a |
---|
994 | * copy; otherwise the new internal rep is marked invalid. |
---|
995 | * |
---|
996 | * Side effects: |
---|
997 | * What constitutes "copying" the internal representation depends on the |
---|
998 | * type. For example, if the argument object is a list, the element |
---|
999 | * objects it points to will not actually be copied but will be shared |
---|
1000 | * with the duplicate list. That is, the ref counts of the element |
---|
1001 | * objects will be incremented. |
---|
1002 | * |
---|
1003 | *---------------------------------------------------------------------- |
---|
1004 | */ |
---|
1005 | |
---|
1006 | Tcl_Obj * |
---|
1007 | Tcl_DuplicateObj( |
---|
1008 | register Tcl_Obj *objPtr) /* The object to duplicate. */ |
---|
1009 | { |
---|
1010 | register Tcl_ObjType *typePtr = objPtr->typePtr; |
---|
1011 | register Tcl_Obj *dupPtr; |
---|
1012 | |
---|
1013 | TclNewObj(dupPtr); |
---|
1014 | |
---|
1015 | if (objPtr->bytes == NULL) { |
---|
1016 | dupPtr->bytes = NULL; |
---|
1017 | } else if (objPtr->bytes != tclEmptyStringRep) { |
---|
1018 | TclInitStringRep(dupPtr, objPtr->bytes, objPtr->length); |
---|
1019 | } |
---|
1020 | |
---|
1021 | if (typePtr != NULL) { |
---|
1022 | if (typePtr->dupIntRepProc == NULL) { |
---|
1023 | dupPtr->internalRep = objPtr->internalRep; |
---|
1024 | dupPtr->typePtr = typePtr; |
---|
1025 | } else { |
---|
1026 | (*typePtr->dupIntRepProc)(objPtr, dupPtr); |
---|
1027 | } |
---|
1028 | } |
---|
1029 | return dupPtr; |
---|
1030 | } |
---|
1031 | |
---|
1032 | /* |
---|
1033 | *---------------------------------------------------------------------- |
---|
1034 | * |
---|
1035 | * Tcl_GetString -- |
---|
1036 | * |
---|
1037 | * Returns the string representation byte array pointer for an object. |
---|
1038 | * |
---|
1039 | * Results: |
---|
1040 | * Returns a pointer to the string representation of objPtr. The byte |
---|
1041 | * array referenced by the returned pointer must not be modified by the |
---|
1042 | * caller. Furthermore, the caller must copy the bytes if they need to |
---|
1043 | * retain them since the object's string rep can change as a result of |
---|
1044 | * other operations. |
---|
1045 | * |
---|
1046 | * Side effects: |
---|
1047 | * May call the object's updateStringProc to update the string |
---|
1048 | * representation from the internal representation. |
---|
1049 | * |
---|
1050 | *---------------------------------------------------------------------- |
---|
1051 | */ |
---|
1052 | |
---|
1053 | char * |
---|
1054 | Tcl_GetString( |
---|
1055 | register Tcl_Obj *objPtr) /* Object whose string rep byte pointer should |
---|
1056 | * be returned. */ |
---|
1057 | { |
---|
1058 | if (objPtr->bytes != NULL) { |
---|
1059 | return objPtr->bytes; |
---|
1060 | } |
---|
1061 | |
---|
1062 | if (objPtr->typePtr->updateStringProc == NULL) { |
---|
1063 | Tcl_Panic("UpdateStringProc should not be invoked for type %s", |
---|
1064 | objPtr->typePtr->name); |
---|
1065 | } |
---|
1066 | (*objPtr->typePtr->updateStringProc)(objPtr); |
---|
1067 | return objPtr->bytes; |
---|
1068 | } |
---|
1069 | |
---|
1070 | /* |
---|
1071 | *---------------------------------------------------------------------- |
---|
1072 | * |
---|
1073 | * Tcl_GetStringFromObj -- |
---|
1074 | * |
---|
1075 | * Returns the string representation's byte array pointer and length for |
---|
1076 | * an object. |
---|
1077 | * |
---|
1078 | * Results: |
---|
1079 | * Returns a pointer to the string representation of objPtr. If lengthPtr |
---|
1080 | * isn't NULL, the length of the string representation is stored at |
---|
1081 | * *lengthPtr. The byte array referenced by the returned pointer must not |
---|
1082 | * be modified by the caller. Furthermore, the caller must copy the bytes |
---|
1083 | * if they need to retain them since the object's string rep can change |
---|
1084 | * as a result of other operations. |
---|
1085 | * |
---|
1086 | * Side effects: |
---|
1087 | * May call the object's updateStringProc to update the string |
---|
1088 | * representation from the internal representation. |
---|
1089 | * |
---|
1090 | *---------------------------------------------------------------------- |
---|
1091 | */ |
---|
1092 | |
---|
1093 | char * |
---|
1094 | Tcl_GetStringFromObj( |
---|
1095 | register Tcl_Obj *objPtr, /* Object whose string rep byte pointer should |
---|
1096 | * be returned. */ |
---|
1097 | register int *lengthPtr) /* If non-NULL, the location where the string |
---|
1098 | * rep's byte array length should * be stored. |
---|
1099 | * If NULL, no length is stored. */ |
---|
1100 | { |
---|
1101 | if (objPtr->bytes == NULL) { |
---|
1102 | if (objPtr->typePtr->updateStringProc == NULL) { |
---|
1103 | Tcl_Panic("UpdateStringProc should not be invoked for type %s", |
---|
1104 | objPtr->typePtr->name); |
---|
1105 | } |
---|
1106 | (*objPtr->typePtr->updateStringProc)(objPtr); |
---|
1107 | } |
---|
1108 | |
---|
1109 | if (lengthPtr != NULL) { |
---|
1110 | *lengthPtr = objPtr->length; |
---|
1111 | } |
---|
1112 | return objPtr->bytes; |
---|
1113 | } |
---|
1114 | |
---|
1115 | /* |
---|
1116 | *---------------------------------------------------------------------- |
---|
1117 | * |
---|
1118 | * Tcl_InvalidateStringRep -- |
---|
1119 | * |
---|
1120 | * This function is called to invalidate an object's string |
---|
1121 | * representation. |
---|
1122 | * |
---|
1123 | * Results: |
---|
1124 | * None. |
---|
1125 | * |
---|
1126 | * Side effects: |
---|
1127 | * Deallocates the storage for any old string representation, then sets |
---|
1128 | * the string representation NULL to mark it invalid. |
---|
1129 | * |
---|
1130 | *---------------------------------------------------------------------- |
---|
1131 | */ |
---|
1132 | |
---|
1133 | void |
---|
1134 | Tcl_InvalidateStringRep( |
---|
1135 | register Tcl_Obj *objPtr) /* Object whose string rep byte pointer should |
---|
1136 | * be freed. */ |
---|
1137 | { |
---|
1138 | TclInvalidateStringRep(objPtr); |
---|
1139 | } |
---|
1140 | |
---|
1141 | |
---|
1142 | /* |
---|
1143 | *---------------------------------------------------------------------- |
---|
1144 | * |
---|
1145 | * Tcl_NewBooleanObj -- |
---|
1146 | * |
---|
1147 | * This function is normally called when not debugging: i.e., when |
---|
1148 | * TCL_MEM_DEBUG is not defined. It creates a new Tcl_Obj and |
---|
1149 | * initializes it from the argument boolean value. A nonzero "boolValue" |
---|
1150 | * is coerced to 1. |
---|
1151 | * |
---|
1152 | * When TCL_MEM_DEBUG is defined, this function just returns the result |
---|
1153 | * of calling the debugging version Tcl_DbNewBooleanObj. |
---|
1154 | * |
---|
1155 | * Results: |
---|
1156 | * The newly created object is returned. This object will have an invalid |
---|
1157 | * string representation. The returned object has ref count 0. |
---|
1158 | * |
---|
1159 | * Side effects: |
---|
1160 | * None. |
---|
1161 | * |
---|
1162 | *---------------------------------------------------------------------- |
---|
1163 | */ |
---|
1164 | |
---|
1165 | #ifdef TCL_MEM_DEBUG |
---|
1166 | #undef Tcl_NewBooleanObj |
---|
1167 | |
---|
1168 | Tcl_Obj * |
---|
1169 | Tcl_NewBooleanObj( |
---|
1170 | register int boolValue) /* Boolean used to initialize new object. */ |
---|
1171 | { |
---|
1172 | return Tcl_DbNewBooleanObj(boolValue, "unknown", 0); |
---|
1173 | } |
---|
1174 | |
---|
1175 | #else /* if not TCL_MEM_DEBUG */ |
---|
1176 | |
---|
1177 | Tcl_Obj * |
---|
1178 | Tcl_NewBooleanObj( |
---|
1179 | register int boolValue) /* Boolean used to initialize new object. */ |
---|
1180 | { |
---|
1181 | register Tcl_Obj *objPtr; |
---|
1182 | |
---|
1183 | TclNewBooleanObj(objPtr, boolValue); |
---|
1184 | return objPtr; |
---|
1185 | } |
---|
1186 | #endif /* TCL_MEM_DEBUG */ |
---|
1187 | |
---|
1188 | /* |
---|
1189 | *---------------------------------------------------------------------- |
---|
1190 | * |
---|
1191 | * Tcl_DbNewBooleanObj -- |
---|
1192 | * |
---|
1193 | * This function is normally called when debugging: i.e., when |
---|
1194 | * TCL_MEM_DEBUG is defined. It creates new boolean objects. It is the |
---|
1195 | * same as the Tcl_NewBooleanObj function above except that it calls |
---|
1196 | * Tcl_DbCkalloc directly with the file name and line number from its |
---|
1197 | * caller. This simplifies debugging since then the [memory active] |
---|
1198 | * command will report the correct file name and line number when |
---|
1199 | * reporting objects that haven't been freed. |
---|
1200 | * |
---|
1201 | * When TCL_MEM_DEBUG is not defined, this function just returns the |
---|
1202 | * result of calling Tcl_NewBooleanObj. |
---|
1203 | * |
---|
1204 | * Results: |
---|
1205 | * The newly created object is returned. This object will have an invalid |
---|
1206 | * string representation. The returned object has ref count 0. |
---|
1207 | * |
---|
1208 | * Side effects: |
---|
1209 | * None. |
---|
1210 | * |
---|
1211 | *---------------------------------------------------------------------- |
---|
1212 | */ |
---|
1213 | |
---|
1214 | #ifdef TCL_MEM_DEBUG |
---|
1215 | |
---|
1216 | Tcl_Obj * |
---|
1217 | Tcl_DbNewBooleanObj( |
---|
1218 | register int boolValue, /* Boolean used to initialize new object. */ |
---|
1219 | CONST char *file, /* The name of the source file calling this |
---|
1220 | * function; used for debugging. */ |
---|
1221 | int line) /* Line number in the source file; used for |
---|
1222 | * debugging. */ |
---|
1223 | { |
---|
1224 | register Tcl_Obj *objPtr; |
---|
1225 | |
---|
1226 | TclDbNewObj(objPtr, file, line); |
---|
1227 | objPtr->bytes = NULL; |
---|
1228 | |
---|
1229 | objPtr->internalRep.longValue = (boolValue? 1 : 0); |
---|
1230 | objPtr->typePtr = &tclIntType; |
---|
1231 | return objPtr; |
---|
1232 | } |
---|
1233 | |
---|
1234 | #else /* if not TCL_MEM_DEBUG */ |
---|
1235 | |
---|
1236 | Tcl_Obj * |
---|
1237 | Tcl_DbNewBooleanObj( |
---|
1238 | register int boolValue, /* Boolean used to initialize new object. */ |
---|
1239 | CONST char *file, /* The name of the source file calling this |
---|
1240 | * function; used for debugging. */ |
---|
1241 | int line) /* Line number in the source file; used for |
---|
1242 | * debugging. */ |
---|
1243 | { |
---|
1244 | return Tcl_NewBooleanObj(boolValue); |
---|
1245 | } |
---|
1246 | #endif /* TCL_MEM_DEBUG */ |
---|
1247 | |
---|
1248 | /* |
---|
1249 | *---------------------------------------------------------------------- |
---|
1250 | * |
---|
1251 | * Tcl_SetBooleanObj -- |
---|
1252 | * |
---|
1253 | * Modify an object to be a boolean object and to have the specified |
---|
1254 | * boolean value. A nonzero "boolValue" is coerced to 1. |
---|
1255 | * |
---|
1256 | * Results: |
---|
1257 | * None. |
---|
1258 | * |
---|
1259 | * Side effects: |
---|
1260 | * The object's old string rep, if any, is freed. Also, any old internal |
---|
1261 | * rep is freed. |
---|
1262 | * |
---|
1263 | *---------------------------------------------------------------------- |
---|
1264 | */ |
---|
1265 | |
---|
1266 | void |
---|
1267 | Tcl_SetBooleanObj( |
---|
1268 | register Tcl_Obj *objPtr, /* Object whose internal rep to init. */ |
---|
1269 | register int boolValue) /* Boolean used to set object's value. */ |
---|
1270 | { |
---|
1271 | if (Tcl_IsShared(objPtr)) { |
---|
1272 | Tcl_Panic("%s called with shared object", "Tcl_SetBooleanObj"); |
---|
1273 | } |
---|
1274 | |
---|
1275 | TclSetBooleanObj(objPtr, boolValue); |
---|
1276 | } |
---|
1277 | |
---|
1278 | /* |
---|
1279 | *---------------------------------------------------------------------- |
---|
1280 | * |
---|
1281 | * Tcl_GetBooleanFromObj -- |
---|
1282 | * |
---|
1283 | * Attempt to return a boolean from the Tcl object "objPtr". This |
---|
1284 | * includes conversion from any of Tcl's numeric types. |
---|
1285 | * |
---|
1286 | * Results: |
---|
1287 | * The return value is a standard Tcl object result. If an error occurs |
---|
1288 | * during conversion, an error message is left in the interpreter's |
---|
1289 | * result unless "interp" is NULL. |
---|
1290 | * |
---|
1291 | * Side effects: |
---|
1292 | * The intrep of *objPtr may be changed. |
---|
1293 | * |
---|
1294 | *---------------------------------------------------------------------- |
---|
1295 | */ |
---|
1296 | |
---|
1297 | int |
---|
1298 | Tcl_GetBooleanFromObj( |
---|
1299 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
1300 | register Tcl_Obj *objPtr, /* The object from which to get boolean. */ |
---|
1301 | register int *boolPtr) /* Place to store resulting boolean. */ |
---|
1302 | { |
---|
1303 | do { |
---|
1304 | if (objPtr->typePtr == &tclIntType) { |
---|
1305 | *boolPtr = (objPtr->internalRep.longValue != 0); |
---|
1306 | return TCL_OK; |
---|
1307 | } |
---|
1308 | if (objPtr->typePtr == &tclBooleanType) { |
---|
1309 | *boolPtr = (int) objPtr->internalRep.longValue; |
---|
1310 | return TCL_OK; |
---|
1311 | } |
---|
1312 | if (objPtr->typePtr == &tclDoubleType) { |
---|
1313 | /* |
---|
1314 | * Caution: Don't be tempted to check directly for the "double" |
---|
1315 | * Tcl_ObjType and then compare the intrep to 0.0. This isn't |
---|
1316 | * reliable because a "double" Tcl_ObjType can hold the NaN value. |
---|
1317 | * Use the API Tcl_GetDoubleFromObj, which does the checking and |
---|
1318 | * sets the proper error message for us. |
---|
1319 | */ |
---|
1320 | |
---|
1321 | double d; |
---|
1322 | |
---|
1323 | if (Tcl_GetDoubleFromObj(interp, objPtr, &d) != TCL_OK) { |
---|
1324 | return TCL_ERROR; |
---|
1325 | } |
---|
1326 | *boolPtr = (d != 0.0); |
---|
1327 | return TCL_OK; |
---|
1328 | } |
---|
1329 | if (objPtr->typePtr == &tclBignumType) { |
---|
1330 | *boolPtr = 1; |
---|
1331 | return TCL_OK; |
---|
1332 | } |
---|
1333 | #ifndef NO_WIDE_TYPE |
---|
1334 | if (objPtr->typePtr == &tclWideIntType) { |
---|
1335 | *boolPtr = (objPtr->internalRep.wideValue != 0); |
---|
1336 | return TCL_OK; |
---|
1337 | } |
---|
1338 | #endif |
---|
1339 | } while ((ParseBoolean(objPtr) == TCL_OK) || (TCL_OK == |
---|
1340 | TclParseNumber(interp, objPtr, "boolean value", NULL,-1,NULL,0))); |
---|
1341 | return TCL_ERROR; |
---|
1342 | } |
---|
1343 | |
---|
1344 | /* |
---|
1345 | *---------------------------------------------------------------------- |
---|
1346 | * |
---|
1347 | * SetBooleanFromAny -- |
---|
1348 | * |
---|
1349 | * Attempt to generate a boolean internal form for the Tcl object |
---|
1350 | * "objPtr". |
---|
1351 | * |
---|
1352 | * Results: |
---|
1353 | * The return value is a standard Tcl result. If an error occurs during |
---|
1354 | * conversion, an error message is left in the interpreter's result |
---|
1355 | * unless "interp" is NULL. |
---|
1356 | * |
---|
1357 | * Side effects: |
---|
1358 | * If no error occurs, an integer 1 or 0 is stored as "objPtr"s internal |
---|
1359 | * representation and the type of "objPtr" is set to boolean. |
---|
1360 | * |
---|
1361 | *---------------------------------------------------------------------- |
---|
1362 | */ |
---|
1363 | |
---|
1364 | static int |
---|
1365 | SetBooleanFromAny( |
---|
1366 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
1367 | register Tcl_Obj *objPtr) /* The object to convert. */ |
---|
1368 | { |
---|
1369 | /* |
---|
1370 | * For some "pure" numeric Tcl_ObjTypes (no string rep), we can determine |
---|
1371 | * whether a boolean conversion is possible without generating the string |
---|
1372 | * rep. |
---|
1373 | */ |
---|
1374 | |
---|
1375 | if (objPtr->bytes == NULL) { |
---|
1376 | if (objPtr->typePtr == &tclIntType) { |
---|
1377 | switch (objPtr->internalRep.longValue) { |
---|
1378 | case 0L: case 1L: |
---|
1379 | return TCL_OK; |
---|
1380 | } |
---|
1381 | goto badBoolean; |
---|
1382 | } |
---|
1383 | |
---|
1384 | if (objPtr->typePtr == &tclBignumType) { |
---|
1385 | goto badBoolean; |
---|
1386 | } |
---|
1387 | |
---|
1388 | #ifndef NO_WIDE_TYPE |
---|
1389 | if (objPtr->typePtr == &tclWideIntType) { |
---|
1390 | goto badBoolean; |
---|
1391 | } |
---|
1392 | #endif |
---|
1393 | |
---|
1394 | if (objPtr->typePtr == &tclDoubleType) { |
---|
1395 | goto badBoolean; |
---|
1396 | } |
---|
1397 | } |
---|
1398 | |
---|
1399 | if (ParseBoolean(objPtr) == TCL_OK) { |
---|
1400 | return TCL_OK; |
---|
1401 | } |
---|
1402 | |
---|
1403 | badBoolean: |
---|
1404 | if (interp != NULL) { |
---|
1405 | int length; |
---|
1406 | char *str = Tcl_GetStringFromObj(objPtr, &length); |
---|
1407 | Tcl_Obj *msg; |
---|
1408 | |
---|
1409 | TclNewLiteralStringObj(msg, "expected boolean value but got \""); |
---|
1410 | Tcl_AppendLimitedToObj(msg, str, length, 50, ""); |
---|
1411 | Tcl_AppendToObj(msg, "\"", -1); |
---|
1412 | Tcl_SetObjResult(interp, msg); |
---|
1413 | } |
---|
1414 | return TCL_ERROR; |
---|
1415 | } |
---|
1416 | |
---|
1417 | static int |
---|
1418 | ParseBoolean( |
---|
1419 | register Tcl_Obj *objPtr) /* The object to parse/convert. */ |
---|
1420 | { |
---|
1421 | int i, length, newBool; |
---|
1422 | char lowerCase[6], *str = TclGetStringFromObj(objPtr, &length); |
---|
1423 | |
---|
1424 | if ((length == 0) || (length > 5)) { |
---|
1425 | /* longest valid boolean string rep. is "false" */ |
---|
1426 | return TCL_ERROR; |
---|
1427 | } |
---|
1428 | |
---|
1429 | switch (str[0]) { |
---|
1430 | case '0': |
---|
1431 | if (length == 1) { |
---|
1432 | newBool = 0; |
---|
1433 | goto numericBoolean; |
---|
1434 | } |
---|
1435 | return TCL_ERROR; |
---|
1436 | case '1': |
---|
1437 | if (length == 1) { |
---|
1438 | newBool = 1; |
---|
1439 | goto numericBoolean; |
---|
1440 | } |
---|
1441 | return TCL_ERROR; |
---|
1442 | } |
---|
1443 | |
---|
1444 | /* |
---|
1445 | * Force to lower case for case-insensitive detection. Filter out known |
---|
1446 | * invalid characters at the same time. |
---|
1447 | */ |
---|
1448 | |
---|
1449 | for (i=0; i < length; i++) { |
---|
1450 | char c = str[i]; |
---|
1451 | switch (c) { |
---|
1452 | case 'A': case 'E': case 'F': case 'L': case 'N': |
---|
1453 | case 'O': case 'R': case 'S': case 'T': case 'U': case 'Y': |
---|
1454 | lowerCase[i] = c + (char) ('a' - 'A'); |
---|
1455 | break; |
---|
1456 | case 'a': case 'e': case 'f': case 'l': case 'n': |
---|
1457 | case 'o': case 'r': case 's': case 't': case 'u': case 'y': |
---|
1458 | lowerCase[i] = c; |
---|
1459 | break; |
---|
1460 | default: |
---|
1461 | return TCL_ERROR; |
---|
1462 | } |
---|
1463 | } |
---|
1464 | lowerCase[length] = 0; |
---|
1465 | switch (lowerCase[0]) { |
---|
1466 | case 'y': |
---|
1467 | /* |
---|
1468 | * Checking the 'y' is redundant, but makes the code clearer. |
---|
1469 | */ |
---|
1470 | if (strncmp(lowerCase, "yes", (size_t) length) == 0) { |
---|
1471 | newBool = 1; |
---|
1472 | goto goodBoolean; |
---|
1473 | } |
---|
1474 | return TCL_ERROR; |
---|
1475 | case 'n': |
---|
1476 | if (strncmp(lowerCase, "no", (size_t) length) == 0) { |
---|
1477 | newBool = 0; |
---|
1478 | goto goodBoolean; |
---|
1479 | } |
---|
1480 | return TCL_ERROR; |
---|
1481 | case 't': |
---|
1482 | if (strncmp(lowerCase, "true", (size_t) length) == 0) { |
---|
1483 | newBool = 1; |
---|
1484 | goto goodBoolean; |
---|
1485 | } |
---|
1486 | return TCL_ERROR; |
---|
1487 | case 'f': |
---|
1488 | if (strncmp(lowerCase, "false", (size_t) length) == 0) { |
---|
1489 | newBool = 0; |
---|
1490 | goto goodBoolean; |
---|
1491 | } |
---|
1492 | return TCL_ERROR; |
---|
1493 | case 'o': |
---|
1494 | if (length < 2) { |
---|
1495 | return TCL_ERROR; |
---|
1496 | } |
---|
1497 | if (strncmp(lowerCase, "on", (size_t) length) == 0) { |
---|
1498 | newBool = 1; |
---|
1499 | goto goodBoolean; |
---|
1500 | } else if (strncmp(lowerCase, "off", (size_t) length) == 0) { |
---|
1501 | newBool = 0; |
---|
1502 | goto goodBoolean; |
---|
1503 | } |
---|
1504 | return TCL_ERROR; |
---|
1505 | default: |
---|
1506 | return TCL_ERROR; |
---|
1507 | } |
---|
1508 | |
---|
1509 | /* |
---|
1510 | * Free the old internalRep before setting the new one. We do this as late |
---|
1511 | * as possible to allow the conversion code, in particular |
---|
1512 | * Tcl_GetStringFromObj, to use that old internalRep. |
---|
1513 | */ |
---|
1514 | |
---|
1515 | goodBoolean: |
---|
1516 | TclFreeIntRep(objPtr); |
---|
1517 | objPtr->internalRep.longValue = newBool; |
---|
1518 | objPtr->typePtr = &tclBooleanType; |
---|
1519 | return TCL_OK; |
---|
1520 | |
---|
1521 | numericBoolean: |
---|
1522 | TclFreeIntRep(objPtr); |
---|
1523 | objPtr->internalRep.longValue = newBool; |
---|
1524 | objPtr->typePtr = &tclIntType; |
---|
1525 | return TCL_OK; |
---|
1526 | } |
---|
1527 | |
---|
1528 | /* |
---|
1529 | *---------------------------------------------------------------------- |
---|
1530 | * |
---|
1531 | * Tcl_NewDoubleObj -- |
---|
1532 | * |
---|
1533 | * This function is normally called when not debugging: i.e., when |
---|
1534 | * TCL_MEM_DEBUG is not defined. It creates a new double object and |
---|
1535 | * initializes it from the argument double value. |
---|
1536 | * |
---|
1537 | * When TCL_MEM_DEBUG is defined, this function just returns the result |
---|
1538 | * of calling the debugging version Tcl_DbNewDoubleObj. |
---|
1539 | * |
---|
1540 | * Results: |
---|
1541 | * The newly created object is returned. This object will have an |
---|
1542 | * invalid string representation. The returned object has ref count 0. |
---|
1543 | * |
---|
1544 | * Side effects: |
---|
1545 | * None. |
---|
1546 | * |
---|
1547 | *---------------------------------------------------------------------- |
---|
1548 | */ |
---|
1549 | |
---|
1550 | #ifdef TCL_MEM_DEBUG |
---|
1551 | #undef Tcl_NewDoubleObj |
---|
1552 | |
---|
1553 | Tcl_Obj * |
---|
1554 | Tcl_NewDoubleObj( |
---|
1555 | register double dblValue) /* Double used to initialize the object. */ |
---|
1556 | { |
---|
1557 | return Tcl_DbNewDoubleObj(dblValue, "unknown", 0); |
---|
1558 | } |
---|
1559 | |
---|
1560 | #else /* if not TCL_MEM_DEBUG */ |
---|
1561 | |
---|
1562 | Tcl_Obj * |
---|
1563 | Tcl_NewDoubleObj( |
---|
1564 | register double dblValue) /* Double used to initialize the object. */ |
---|
1565 | { |
---|
1566 | register Tcl_Obj *objPtr; |
---|
1567 | |
---|
1568 | TclNewDoubleObj(objPtr, dblValue); |
---|
1569 | return objPtr; |
---|
1570 | } |
---|
1571 | #endif /* if TCL_MEM_DEBUG */ |
---|
1572 | |
---|
1573 | /* |
---|
1574 | *---------------------------------------------------------------------- |
---|
1575 | * |
---|
1576 | * Tcl_DbNewDoubleObj -- |
---|
1577 | * |
---|
1578 | * This function is normally called when debugging: i.e., when |
---|
1579 | * TCL_MEM_DEBUG is defined. It creates new double objects. It is the |
---|
1580 | * same as the Tcl_NewDoubleObj function above except that it calls |
---|
1581 | * Tcl_DbCkalloc directly with the file name and line number from its |
---|
1582 | * caller. This simplifies debugging since then the [memory active] |
---|
1583 | * command will report the correct file name and line number when |
---|
1584 | * reporting objects that haven't been freed. |
---|
1585 | * |
---|
1586 | * When TCL_MEM_DEBUG is not defined, this function just returns the |
---|
1587 | * result of calling Tcl_NewDoubleObj. |
---|
1588 | * |
---|
1589 | * Results: |
---|
1590 | * The newly created object is returned. This object will have an invalid |
---|
1591 | * string representation. The returned object has ref count 0. |
---|
1592 | * |
---|
1593 | * Side effects: |
---|
1594 | * None. |
---|
1595 | * |
---|
1596 | *---------------------------------------------------------------------- |
---|
1597 | */ |
---|
1598 | |
---|
1599 | #ifdef TCL_MEM_DEBUG |
---|
1600 | |
---|
1601 | Tcl_Obj * |
---|
1602 | Tcl_DbNewDoubleObj( |
---|
1603 | register double dblValue, /* Double used to initialize the object. */ |
---|
1604 | CONST char *file, /* The name of the source file calling this |
---|
1605 | * function; used for debugging. */ |
---|
1606 | int line) /* Line number in the source file; used for |
---|
1607 | * debugging. */ |
---|
1608 | { |
---|
1609 | register Tcl_Obj *objPtr; |
---|
1610 | |
---|
1611 | TclDbNewObj(objPtr, file, line); |
---|
1612 | objPtr->bytes = NULL; |
---|
1613 | |
---|
1614 | objPtr->internalRep.doubleValue = dblValue; |
---|
1615 | objPtr->typePtr = &tclDoubleType; |
---|
1616 | return objPtr; |
---|
1617 | } |
---|
1618 | |
---|
1619 | #else /* if not TCL_MEM_DEBUG */ |
---|
1620 | |
---|
1621 | Tcl_Obj * |
---|
1622 | Tcl_DbNewDoubleObj( |
---|
1623 | register double dblValue, /* Double used to initialize the object. */ |
---|
1624 | CONST char *file, /* The name of the source file calling this |
---|
1625 | * function; used for debugging. */ |
---|
1626 | int line) /* Line number in the source file; used for |
---|
1627 | * debugging. */ |
---|
1628 | { |
---|
1629 | return Tcl_NewDoubleObj(dblValue); |
---|
1630 | } |
---|
1631 | #endif /* TCL_MEM_DEBUG */ |
---|
1632 | |
---|
1633 | /* |
---|
1634 | *---------------------------------------------------------------------- |
---|
1635 | * |
---|
1636 | * Tcl_SetDoubleObj -- |
---|
1637 | * |
---|
1638 | * Modify an object to be a double object and to have the specified |
---|
1639 | * double value. |
---|
1640 | * |
---|
1641 | * Results: |
---|
1642 | * None. |
---|
1643 | * |
---|
1644 | * Side effects: |
---|
1645 | * The object's old string rep, if any, is freed. Also, any old internal |
---|
1646 | * rep is freed. |
---|
1647 | * |
---|
1648 | *---------------------------------------------------------------------- |
---|
1649 | */ |
---|
1650 | |
---|
1651 | void |
---|
1652 | Tcl_SetDoubleObj( |
---|
1653 | register Tcl_Obj *objPtr, /* Object whose internal rep to init. */ |
---|
1654 | register double dblValue) /* Double used to set the object's value. */ |
---|
1655 | { |
---|
1656 | if (Tcl_IsShared(objPtr)) { |
---|
1657 | Tcl_Panic("%s called with shared object", "Tcl_SetDoubleObj"); |
---|
1658 | } |
---|
1659 | |
---|
1660 | TclSetDoubleObj(objPtr, dblValue); |
---|
1661 | } |
---|
1662 | |
---|
1663 | /* |
---|
1664 | *---------------------------------------------------------------------- |
---|
1665 | * |
---|
1666 | * Tcl_GetDoubleFromObj -- |
---|
1667 | * |
---|
1668 | * Attempt to return a double from the Tcl object "objPtr". If the object |
---|
1669 | * is not already a double, an attempt will be made to convert it to one. |
---|
1670 | * |
---|
1671 | * Results: |
---|
1672 | * The return value is a standard Tcl object result. If an error occurs |
---|
1673 | * during conversion, an error message is left in the interpreter's |
---|
1674 | * result unless "interp" is NULL. |
---|
1675 | * |
---|
1676 | * Side effects: |
---|
1677 | * If the object is not already a double, the conversion will free any |
---|
1678 | * old internal representation. |
---|
1679 | * |
---|
1680 | *---------------------------------------------------------------------- |
---|
1681 | */ |
---|
1682 | |
---|
1683 | int |
---|
1684 | Tcl_GetDoubleFromObj( |
---|
1685 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
1686 | register Tcl_Obj *objPtr, /* The object from which to get a double. */ |
---|
1687 | register double *dblPtr) /* Place to store resulting double. */ |
---|
1688 | { |
---|
1689 | do { |
---|
1690 | if (objPtr->typePtr == &tclDoubleType) { |
---|
1691 | if (TclIsNaN(objPtr->internalRep.doubleValue)) { |
---|
1692 | if (interp != NULL) { |
---|
1693 | Tcl_SetObjResult(interp, Tcl_NewStringObj( |
---|
1694 | "floating point value is Not a Number", -1)); |
---|
1695 | } |
---|
1696 | return TCL_ERROR; |
---|
1697 | } |
---|
1698 | *dblPtr = (double) objPtr->internalRep.doubleValue; |
---|
1699 | return TCL_OK; |
---|
1700 | } |
---|
1701 | if (objPtr->typePtr == &tclIntType) { |
---|
1702 | *dblPtr = objPtr->internalRep.longValue; |
---|
1703 | return TCL_OK; |
---|
1704 | } |
---|
1705 | if (objPtr->typePtr == &tclBignumType) { |
---|
1706 | mp_int big; |
---|
1707 | UNPACK_BIGNUM( objPtr, big ); |
---|
1708 | *dblPtr = TclBignumToDouble( &big ); |
---|
1709 | return TCL_OK; |
---|
1710 | } |
---|
1711 | #ifndef NO_WIDE_TYPE |
---|
1712 | if (objPtr->typePtr == &tclWideIntType) { |
---|
1713 | *dblPtr = (double) objPtr->internalRep.wideValue; |
---|
1714 | return TCL_OK; |
---|
1715 | } |
---|
1716 | #endif |
---|
1717 | } while (SetDoubleFromAny(interp, objPtr) == TCL_OK); |
---|
1718 | return TCL_ERROR; |
---|
1719 | } |
---|
1720 | |
---|
1721 | /* |
---|
1722 | *---------------------------------------------------------------------- |
---|
1723 | * |
---|
1724 | * SetDoubleFromAny -- |
---|
1725 | * |
---|
1726 | * Attempt to generate an double-precision floating point internal form |
---|
1727 | * for the Tcl object "objPtr". |
---|
1728 | * |
---|
1729 | * Results: |
---|
1730 | * The return value is a standard Tcl object result. If an error occurs |
---|
1731 | * during conversion, an error message is left in the interpreter's |
---|
1732 | * result unless "interp" is NULL. |
---|
1733 | * |
---|
1734 | * Side effects: |
---|
1735 | * If no error occurs, a double is stored as "objPtr"s internal |
---|
1736 | * representation. |
---|
1737 | * |
---|
1738 | *---------------------------------------------------------------------- |
---|
1739 | */ |
---|
1740 | |
---|
1741 | static int |
---|
1742 | SetDoubleFromAny( |
---|
1743 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
1744 | register Tcl_Obj *objPtr) /* The object to convert. */ |
---|
1745 | { |
---|
1746 | return TclParseNumber(interp, objPtr, "floating-point number", NULL, -1, |
---|
1747 | NULL, 0); |
---|
1748 | } |
---|
1749 | |
---|
1750 | /* |
---|
1751 | *---------------------------------------------------------------------- |
---|
1752 | * |
---|
1753 | * UpdateStringOfDouble -- |
---|
1754 | * |
---|
1755 | * Update the string representation for a double-precision floating point |
---|
1756 | * object. This must obey the current tcl_precision value for |
---|
1757 | * double-to-string conversions. Note: This function does not free an |
---|
1758 | * existing old string rep so storage will be lost if this has not |
---|
1759 | * already been done. |
---|
1760 | * |
---|
1761 | * Results: |
---|
1762 | * None. |
---|
1763 | * |
---|
1764 | * Side effects: |
---|
1765 | * The object's string is set to a valid string that results from the |
---|
1766 | * double-to-string conversion. |
---|
1767 | * |
---|
1768 | *---------------------------------------------------------------------- |
---|
1769 | */ |
---|
1770 | |
---|
1771 | static void |
---|
1772 | UpdateStringOfDouble( |
---|
1773 | register Tcl_Obj *objPtr) /* Double obj with string rep to update. */ |
---|
1774 | { |
---|
1775 | char buffer[TCL_DOUBLE_SPACE]; |
---|
1776 | register int len; |
---|
1777 | |
---|
1778 | Tcl_PrintDouble(NULL, objPtr->internalRep.doubleValue, buffer); |
---|
1779 | len = strlen(buffer); |
---|
1780 | |
---|
1781 | objPtr->bytes = (char *) ckalloc((unsigned) len + 1); |
---|
1782 | strcpy(objPtr->bytes, buffer); |
---|
1783 | objPtr->length = len; |
---|
1784 | } |
---|
1785 | |
---|
1786 | /* |
---|
1787 | *---------------------------------------------------------------------- |
---|
1788 | * |
---|
1789 | * Tcl_NewIntObj -- |
---|
1790 | * |
---|
1791 | * If a client is compiled with TCL_MEM_DEBUG defined, calls to |
---|
1792 | * Tcl_NewIntObj to create a new integer object end up calling the |
---|
1793 | * debugging function Tcl_DbNewLongObj instead. |
---|
1794 | * |
---|
1795 | * Otherwise, if the client is compiled without TCL_MEM_DEBUG defined, |
---|
1796 | * calls to Tcl_NewIntObj result in a call to one of the two |
---|
1797 | * Tcl_NewIntObj implementations below. We provide two implementations so |
---|
1798 | * that the Tcl core can be compiled to do memory debugging of the core |
---|
1799 | * even if a client does not request it for itself. |
---|
1800 | * |
---|
1801 | * Integer and long integer objects share the same "integer" type |
---|
1802 | * implementation. We store all integers as longs and Tcl_GetIntFromObj |
---|
1803 | * checks whether the current value of the long can be represented by an |
---|
1804 | * int. |
---|
1805 | * |
---|
1806 | * Results: |
---|
1807 | * The newly created object is returned. This object will have an invalid |
---|
1808 | * string representation. The returned object has ref count 0. |
---|
1809 | * |
---|
1810 | * Side effects: |
---|
1811 | * None. |
---|
1812 | * |
---|
1813 | *---------------------------------------------------------------------- |
---|
1814 | */ |
---|
1815 | |
---|
1816 | #ifdef TCL_MEM_DEBUG |
---|
1817 | #undef Tcl_NewIntObj |
---|
1818 | |
---|
1819 | Tcl_Obj * |
---|
1820 | Tcl_NewIntObj( |
---|
1821 | register int intValue) /* Int used to initialize the new object. */ |
---|
1822 | { |
---|
1823 | return Tcl_DbNewLongObj((long)intValue, "unknown", 0); |
---|
1824 | } |
---|
1825 | |
---|
1826 | #else /* if not TCL_MEM_DEBUG */ |
---|
1827 | |
---|
1828 | Tcl_Obj * |
---|
1829 | Tcl_NewIntObj( |
---|
1830 | register int intValue) /* Int used to initialize the new object. */ |
---|
1831 | { |
---|
1832 | register Tcl_Obj *objPtr; |
---|
1833 | |
---|
1834 | TclNewIntObj(objPtr, intValue); |
---|
1835 | return objPtr; |
---|
1836 | } |
---|
1837 | #endif /* if TCL_MEM_DEBUG */ |
---|
1838 | |
---|
1839 | /* |
---|
1840 | *---------------------------------------------------------------------- |
---|
1841 | * |
---|
1842 | * Tcl_SetIntObj -- |
---|
1843 | * |
---|
1844 | * Modify an object to be an integer and to have the specified integer |
---|
1845 | * value. |
---|
1846 | * |
---|
1847 | * Results: |
---|
1848 | * None. |
---|
1849 | * |
---|
1850 | * Side effects: |
---|
1851 | * The object's old string rep, if any, is freed. Also, any old internal |
---|
1852 | * rep is freed. |
---|
1853 | * |
---|
1854 | *---------------------------------------------------------------------- |
---|
1855 | */ |
---|
1856 | |
---|
1857 | void |
---|
1858 | Tcl_SetIntObj( |
---|
1859 | register Tcl_Obj *objPtr, /* Object whose internal rep to init. */ |
---|
1860 | register int intValue) /* Integer used to set object's value. */ |
---|
1861 | { |
---|
1862 | if (Tcl_IsShared(objPtr)) { |
---|
1863 | Tcl_Panic("%s called with shared object", "Tcl_SetIntObj"); |
---|
1864 | } |
---|
1865 | |
---|
1866 | TclSetIntObj(objPtr, intValue); |
---|
1867 | } |
---|
1868 | |
---|
1869 | /* |
---|
1870 | *---------------------------------------------------------------------- |
---|
1871 | * |
---|
1872 | * Tcl_GetIntFromObj -- |
---|
1873 | * |
---|
1874 | * Attempt to return an int from the Tcl object "objPtr". If the object |
---|
1875 | * is not already an int, an attempt will be made to convert it to one. |
---|
1876 | * |
---|
1877 | * Integer and long integer objects share the same "integer" type |
---|
1878 | * implementation. We store all integers as longs and Tcl_GetIntFromObj |
---|
1879 | * checks whether the current value of the long can be represented by an |
---|
1880 | * int. |
---|
1881 | * |
---|
1882 | * Results: |
---|
1883 | * The return value is a standard Tcl object result. If an error occurs |
---|
1884 | * during conversion or if the long integer held by the object can not be |
---|
1885 | * represented by an int, an error message is left in the interpreter's |
---|
1886 | * result unless "interp" is NULL. |
---|
1887 | * |
---|
1888 | * Side effects: |
---|
1889 | * If the object is not already an int, the conversion will free any old |
---|
1890 | * internal representation. |
---|
1891 | * |
---|
1892 | *---------------------------------------------------------------------- |
---|
1893 | */ |
---|
1894 | |
---|
1895 | int |
---|
1896 | Tcl_GetIntFromObj( |
---|
1897 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
1898 | register Tcl_Obj *objPtr, /* The object from which to get a int. */ |
---|
1899 | register int *intPtr) /* Place to store resulting int. */ |
---|
1900 | { |
---|
1901 | #if (LONG_MAX == INT_MAX) |
---|
1902 | return TclGetLongFromObj(interp, objPtr, (long *) intPtr); |
---|
1903 | #else |
---|
1904 | long l; |
---|
1905 | |
---|
1906 | if (TclGetLongFromObj(interp, objPtr, &l) != TCL_OK) { |
---|
1907 | return TCL_ERROR; |
---|
1908 | } |
---|
1909 | if ((ULONG_MAX > UINT_MAX) && ((l > UINT_MAX) || (l < -(long)UINT_MAX))) { |
---|
1910 | if (interp != NULL) { |
---|
1911 | CONST char *s = |
---|
1912 | "integer value too large to represent as non-long integer"; |
---|
1913 | Tcl_SetObjResult(interp, Tcl_NewStringObj(s, -1)); |
---|
1914 | Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", s, NULL); |
---|
1915 | } |
---|
1916 | return TCL_ERROR; |
---|
1917 | } |
---|
1918 | *intPtr = (int) l; |
---|
1919 | return TCL_OK; |
---|
1920 | #endif |
---|
1921 | } |
---|
1922 | |
---|
1923 | /* |
---|
1924 | *---------------------------------------------------------------------- |
---|
1925 | * |
---|
1926 | * SetIntFromAny -- |
---|
1927 | * |
---|
1928 | * Attempts to force the internal representation for a Tcl object to |
---|
1929 | * tclIntType, specifically. |
---|
1930 | * |
---|
1931 | * Results: |
---|
1932 | * The return value is a standard object Tcl result. If an error occurs |
---|
1933 | * during conversion, an error message is left in the interpreter's |
---|
1934 | * result unless "interp" is NULL. |
---|
1935 | * |
---|
1936 | *---------------------------------------------------------------------- |
---|
1937 | */ |
---|
1938 | |
---|
1939 | static int |
---|
1940 | SetIntFromAny( |
---|
1941 | Tcl_Interp *interp, /* Tcl interpreter */ |
---|
1942 | Tcl_Obj *objPtr) /* Pointer to the object to convert */ |
---|
1943 | { |
---|
1944 | long l; |
---|
1945 | return TclGetLongFromObj(interp, objPtr, &l); |
---|
1946 | } |
---|
1947 | |
---|
1948 | /* |
---|
1949 | *---------------------------------------------------------------------- |
---|
1950 | * |
---|
1951 | * UpdateStringOfInt -- |
---|
1952 | * |
---|
1953 | * Update the string representation for an integer object. Note: This |
---|
1954 | * function does not free an existing old string rep so storage will be |
---|
1955 | * lost if this has not already been done. |
---|
1956 | * |
---|
1957 | * Results: |
---|
1958 | * None. |
---|
1959 | * |
---|
1960 | * Side effects: |
---|
1961 | * The object's string is set to a valid string that results from the |
---|
1962 | * int-to-string conversion. |
---|
1963 | * |
---|
1964 | *---------------------------------------------------------------------- |
---|
1965 | */ |
---|
1966 | |
---|
1967 | static void |
---|
1968 | UpdateStringOfInt( |
---|
1969 | register Tcl_Obj *objPtr) /* Int object whose string rep to update. */ |
---|
1970 | { |
---|
1971 | char buffer[TCL_INTEGER_SPACE]; |
---|
1972 | register int len; |
---|
1973 | |
---|
1974 | len = TclFormatInt(buffer, objPtr->internalRep.longValue); |
---|
1975 | |
---|
1976 | objPtr->bytes = ckalloc((unsigned) len + 1); |
---|
1977 | strcpy(objPtr->bytes, buffer); |
---|
1978 | objPtr->length = len; |
---|
1979 | } |
---|
1980 | |
---|
1981 | /* |
---|
1982 | *---------------------------------------------------------------------- |
---|
1983 | * |
---|
1984 | * Tcl_NewLongObj -- |
---|
1985 | * |
---|
1986 | * If a client is compiled with TCL_MEM_DEBUG defined, calls to |
---|
1987 | * Tcl_NewLongObj to create a new long integer object end up calling the |
---|
1988 | * debugging function Tcl_DbNewLongObj instead. |
---|
1989 | * |
---|
1990 | * Otherwise, if the client is compiled without TCL_MEM_DEBUG defined, |
---|
1991 | * calls to Tcl_NewLongObj result in a call to one of the two |
---|
1992 | * Tcl_NewLongObj implementations below. We provide two implementations |
---|
1993 | * so that the Tcl core can be compiled to do memory debugging of the |
---|
1994 | * core even if a client does not request it for itself. |
---|
1995 | * |
---|
1996 | * Integer and long integer objects share the same "integer" type |
---|
1997 | * implementation. We store all integers as longs and Tcl_GetIntFromObj |
---|
1998 | * checks whether the current value of the long can be represented by an |
---|
1999 | * int. |
---|
2000 | * |
---|
2001 | * Results: |
---|
2002 | * The newly created object is returned. This object will have an invalid |
---|
2003 | * string representation. The returned object has ref count 0. |
---|
2004 | * |
---|
2005 | * Side effects: |
---|
2006 | * None. |
---|
2007 | * |
---|
2008 | *---------------------------------------------------------------------- |
---|
2009 | */ |
---|
2010 | |
---|
2011 | #ifdef TCL_MEM_DEBUG |
---|
2012 | #undef Tcl_NewLongObj |
---|
2013 | |
---|
2014 | Tcl_Obj * |
---|
2015 | Tcl_NewLongObj( |
---|
2016 | register long longValue) /* Long integer used to initialize the |
---|
2017 | * new object. */ |
---|
2018 | { |
---|
2019 | return Tcl_DbNewLongObj(longValue, "unknown", 0); |
---|
2020 | } |
---|
2021 | |
---|
2022 | #else /* if not TCL_MEM_DEBUG */ |
---|
2023 | |
---|
2024 | Tcl_Obj * |
---|
2025 | Tcl_NewLongObj( |
---|
2026 | register long longValue) /* Long integer used to initialize the |
---|
2027 | * new object. */ |
---|
2028 | { |
---|
2029 | register Tcl_Obj *objPtr; |
---|
2030 | |
---|
2031 | TclNewLongObj(objPtr, longValue); |
---|
2032 | return objPtr; |
---|
2033 | } |
---|
2034 | #endif /* if TCL_MEM_DEBUG */ |
---|
2035 | |
---|
2036 | /* |
---|
2037 | *---------------------------------------------------------------------- |
---|
2038 | * |
---|
2039 | * Tcl_DbNewLongObj -- |
---|
2040 | * |
---|
2041 | * If a client is compiled with TCL_MEM_DEBUG defined, calls to |
---|
2042 | * Tcl_NewIntObj and Tcl_NewLongObj to create new integer or long integer |
---|
2043 | * objects end up calling the debugging function Tcl_DbNewLongObj |
---|
2044 | * instead. We provide two implementations of Tcl_DbNewLongObj so that |
---|
2045 | * whether the Tcl core is compiled to do memory debugging of the core is |
---|
2046 | * independent of whether a client requests debugging for itself. |
---|
2047 | * |
---|
2048 | * When the core is compiled with TCL_MEM_DEBUG defined, Tcl_DbNewLongObj |
---|
2049 | * calls Tcl_DbCkalloc directly with the file name and line number from |
---|
2050 | * its caller. This simplifies debugging since then the [memory active] |
---|
2051 | * command will report the caller's file name and line number when |
---|
2052 | * reporting objects that haven't been freed. |
---|
2053 | * |
---|
2054 | * Otherwise, when the core is compiled without TCL_MEM_DEBUG defined, |
---|
2055 | * this function just returns the result of calling Tcl_NewLongObj. |
---|
2056 | * |
---|
2057 | * Results: |
---|
2058 | * The newly created long integer object is returned. This object will |
---|
2059 | * have an invalid string representation. The returned object has ref |
---|
2060 | * count 0. |
---|
2061 | * |
---|
2062 | * Side effects: |
---|
2063 | * Allocates memory. |
---|
2064 | * |
---|
2065 | *---------------------------------------------------------------------- |
---|
2066 | */ |
---|
2067 | |
---|
2068 | #ifdef TCL_MEM_DEBUG |
---|
2069 | |
---|
2070 | Tcl_Obj * |
---|
2071 | Tcl_DbNewLongObj( |
---|
2072 | register long longValue, /* Long integer used to initialize the new |
---|
2073 | * object. */ |
---|
2074 | CONST char *file, /* The name of the source file calling this |
---|
2075 | * function; used for debugging. */ |
---|
2076 | int line) /* Line number in the source file; used for |
---|
2077 | * debugging. */ |
---|
2078 | { |
---|
2079 | register Tcl_Obj *objPtr; |
---|
2080 | |
---|
2081 | TclDbNewObj(objPtr, file, line); |
---|
2082 | objPtr->bytes = NULL; |
---|
2083 | |
---|
2084 | objPtr->internalRep.longValue = longValue; |
---|
2085 | objPtr->typePtr = &tclIntType; |
---|
2086 | return objPtr; |
---|
2087 | } |
---|
2088 | |
---|
2089 | #else /* if not TCL_MEM_DEBUG */ |
---|
2090 | |
---|
2091 | Tcl_Obj * |
---|
2092 | Tcl_DbNewLongObj( |
---|
2093 | register long longValue, /* Long integer used to initialize the new |
---|
2094 | * object. */ |
---|
2095 | CONST char *file, /* The name of the source file calling this |
---|
2096 | * function; used for debugging. */ |
---|
2097 | int line) /* Line number in the source file; used for |
---|
2098 | * debugging. */ |
---|
2099 | { |
---|
2100 | return Tcl_NewLongObj(longValue); |
---|
2101 | } |
---|
2102 | #endif /* TCL_MEM_DEBUG */ |
---|
2103 | |
---|
2104 | /* |
---|
2105 | *---------------------------------------------------------------------- |
---|
2106 | * |
---|
2107 | * Tcl_SetLongObj -- |
---|
2108 | * |
---|
2109 | * Modify an object to be an integer object and to have the specified |
---|
2110 | * long integer value. |
---|
2111 | * |
---|
2112 | * Results: |
---|
2113 | * None. |
---|
2114 | * |
---|
2115 | * Side effects: |
---|
2116 | * The object's old string rep, if any, is freed. Also, any old internal |
---|
2117 | * rep is freed. |
---|
2118 | * |
---|
2119 | *---------------------------------------------------------------------- |
---|
2120 | */ |
---|
2121 | |
---|
2122 | void |
---|
2123 | Tcl_SetLongObj( |
---|
2124 | register Tcl_Obj *objPtr, /* Object whose internal rep to init. */ |
---|
2125 | register long longValue) /* Long integer used to initialize the |
---|
2126 | * object's value. */ |
---|
2127 | { |
---|
2128 | if (Tcl_IsShared(objPtr)) { |
---|
2129 | Tcl_Panic("%s called with shared object", "Tcl_SetLongObj"); |
---|
2130 | } |
---|
2131 | |
---|
2132 | TclSetLongObj(objPtr, longValue); |
---|
2133 | } |
---|
2134 | |
---|
2135 | /* |
---|
2136 | *---------------------------------------------------------------------- |
---|
2137 | * |
---|
2138 | * Tcl_GetLongFromObj -- |
---|
2139 | * |
---|
2140 | * Attempt to return an long integer from the Tcl object "objPtr". If the |
---|
2141 | * object is not already an int object, an attempt will be made to |
---|
2142 | * convert it to one. |
---|
2143 | * |
---|
2144 | * Results: |
---|
2145 | * The return value is a standard Tcl object result. If an error occurs |
---|
2146 | * during conversion, an error message is left in the interpreter's |
---|
2147 | * result unless "interp" is NULL. |
---|
2148 | * |
---|
2149 | * Side effects: |
---|
2150 | * If the object is not already an int object, the conversion will free |
---|
2151 | * any old internal representation. |
---|
2152 | * |
---|
2153 | *---------------------------------------------------------------------- |
---|
2154 | */ |
---|
2155 | |
---|
2156 | int |
---|
2157 | Tcl_GetLongFromObj( |
---|
2158 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
2159 | register Tcl_Obj *objPtr, /* The object from which to get a long. */ |
---|
2160 | register long *longPtr) /* Place to store resulting long. */ |
---|
2161 | { |
---|
2162 | do { |
---|
2163 | if (objPtr->typePtr == &tclIntType) { |
---|
2164 | *longPtr = objPtr->internalRep.longValue; |
---|
2165 | return TCL_OK; |
---|
2166 | } |
---|
2167 | #ifndef NO_WIDE_TYPE |
---|
2168 | if (objPtr->typePtr == &tclWideIntType) { |
---|
2169 | /* |
---|
2170 | * We return any integer in the range -ULONG_MAX to ULONG_MAX |
---|
2171 | * converted to a long, ignoring overflow. The rule preserves |
---|
2172 | * existing semantics for conversion of integers on input, but |
---|
2173 | * avoids inadvertent demotion of wide integers to 32-bit ones in |
---|
2174 | * the internal rep. |
---|
2175 | */ |
---|
2176 | |
---|
2177 | Tcl_WideInt w = objPtr->internalRep.wideValue; |
---|
2178 | if (w >= -(Tcl_WideInt)(ULONG_MAX) |
---|
2179 | && w <= (Tcl_WideInt)(ULONG_MAX)) { |
---|
2180 | *longPtr = Tcl_WideAsLong(w); |
---|
2181 | return TCL_OK; |
---|
2182 | } |
---|
2183 | goto tooLarge; |
---|
2184 | } |
---|
2185 | #endif |
---|
2186 | if (objPtr->typePtr == &tclDoubleType) { |
---|
2187 | if (interp != NULL) { |
---|
2188 | Tcl_Obj *msg; |
---|
2189 | |
---|
2190 | TclNewLiteralStringObj(msg, "expected integer but got \""); |
---|
2191 | Tcl_AppendObjToObj(msg, objPtr); |
---|
2192 | Tcl_AppendToObj(msg, "\"", -1); |
---|
2193 | Tcl_SetObjResult(interp, msg); |
---|
2194 | } |
---|
2195 | return TCL_ERROR; |
---|
2196 | } |
---|
2197 | if (objPtr->typePtr == &tclBignumType) { |
---|
2198 | /* |
---|
2199 | * Must check for those bignum values that can fit in a long, even |
---|
2200 | * when auto-narrowing is enabled. Only those values in the signed |
---|
2201 | * long range get auto-narrowed to tclIntType, while all the |
---|
2202 | * values in the unsigned long range will fit in a long. |
---|
2203 | */ |
---|
2204 | |
---|
2205 | mp_int big; |
---|
2206 | |
---|
2207 | UNPACK_BIGNUM(objPtr, big); |
---|
2208 | if ((size_t)(big.used) <= (CHAR_BIT * sizeof(long) + DIGIT_BIT - 1) |
---|
2209 | / DIGIT_BIT) { |
---|
2210 | unsigned long value = 0, numBytes = sizeof(long); |
---|
2211 | long scratch; |
---|
2212 | unsigned char *bytes = (unsigned char *)&scratch; |
---|
2213 | if (mp_to_unsigned_bin_n(&big, bytes, &numBytes) == MP_OKAY) { |
---|
2214 | while (numBytes-- > 0) { |
---|
2215 | value = (value << CHAR_BIT) | *bytes++; |
---|
2216 | } |
---|
2217 | if (big.sign) { |
---|
2218 | *longPtr = - (long) value; |
---|
2219 | } else { |
---|
2220 | *longPtr = (long) value; |
---|
2221 | } |
---|
2222 | return TCL_OK; |
---|
2223 | } |
---|
2224 | } |
---|
2225 | #ifndef NO_WIDE_TYPE |
---|
2226 | tooLarge: |
---|
2227 | #endif |
---|
2228 | if (interp != NULL) { |
---|
2229 | char *s = "integer value too large to represent"; |
---|
2230 | Tcl_Obj *msg = Tcl_NewStringObj(s, -1); |
---|
2231 | |
---|
2232 | Tcl_SetObjResult(interp, msg); |
---|
2233 | Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", s, NULL); |
---|
2234 | } |
---|
2235 | return TCL_ERROR; |
---|
2236 | } |
---|
2237 | } while (TclParseNumber(interp, objPtr, "integer", NULL, -1, NULL, |
---|
2238 | TCL_PARSE_INTEGER_ONLY)==TCL_OK); |
---|
2239 | return TCL_ERROR; |
---|
2240 | } |
---|
2241 | #ifndef NO_WIDE_TYPE |
---|
2242 | |
---|
2243 | /* |
---|
2244 | *---------------------------------------------------------------------- |
---|
2245 | * |
---|
2246 | * UpdateStringOfWideInt -- |
---|
2247 | * |
---|
2248 | * Update the string representation for a wide integer object. Note: this |
---|
2249 | * function does not free an existing old string rep so storage will be |
---|
2250 | * lost if this has not already been done. |
---|
2251 | * |
---|
2252 | * Results: |
---|
2253 | * None. |
---|
2254 | * |
---|
2255 | * Side effects: |
---|
2256 | * The object's string is set to a valid string that results from the |
---|
2257 | * wideInt-to-string conversion. |
---|
2258 | * |
---|
2259 | *---------------------------------------------------------------------- |
---|
2260 | */ |
---|
2261 | |
---|
2262 | static void |
---|
2263 | UpdateStringOfWideInt( |
---|
2264 | register Tcl_Obj *objPtr) /* Int object whose string rep to update. */ |
---|
2265 | { |
---|
2266 | char buffer[TCL_INTEGER_SPACE+2]; |
---|
2267 | register unsigned len; |
---|
2268 | register Tcl_WideInt wideVal = objPtr->internalRep.wideValue; |
---|
2269 | |
---|
2270 | /* |
---|
2271 | * Note that sprintf will generate a compiler warning under Mingw claiming |
---|
2272 | * %I64 is an unknown format specifier. Just ignore this warning. We can't |
---|
2273 | * use %L as the format specifier since that gets printed as a 32 bit |
---|
2274 | * value. |
---|
2275 | */ |
---|
2276 | |
---|
2277 | sprintf(buffer, "%" TCL_LL_MODIFIER "d", wideVal); |
---|
2278 | len = strlen(buffer); |
---|
2279 | objPtr->bytes = ckalloc((unsigned) len + 1); |
---|
2280 | memcpy(objPtr->bytes, buffer, len + 1); |
---|
2281 | objPtr->length = len; |
---|
2282 | } |
---|
2283 | #endif /* !NO_WIDE_TYPE */ |
---|
2284 | |
---|
2285 | /* |
---|
2286 | *---------------------------------------------------------------------- |
---|
2287 | * |
---|
2288 | * Tcl_NewWideIntObj -- |
---|
2289 | * |
---|
2290 | * If a client is compiled with TCL_MEM_DEBUG defined, calls to |
---|
2291 | * Tcl_NewWideIntObj to create a new 64-bit integer object end up calling |
---|
2292 | * the debugging function Tcl_DbNewWideIntObj instead. |
---|
2293 | * |
---|
2294 | * Otherwise, if the client is compiled without TCL_MEM_DEBUG defined, |
---|
2295 | * calls to Tcl_NewWideIntObj result in a call to one of the two |
---|
2296 | * Tcl_NewWideIntObj implementations below. We provide two |
---|
2297 | * implementations so that the Tcl core can be compiled to do memory |
---|
2298 | * debugging of the core even if a client does not request it for itself. |
---|
2299 | * |
---|
2300 | * Results: |
---|
2301 | * The newly created object is returned. This object will have an invalid |
---|
2302 | * string representation. The returned object has ref count 0. |
---|
2303 | * |
---|
2304 | * Side effects: |
---|
2305 | * None. |
---|
2306 | * |
---|
2307 | *---------------------------------------------------------------------- |
---|
2308 | */ |
---|
2309 | |
---|
2310 | #ifdef TCL_MEM_DEBUG |
---|
2311 | #undef Tcl_NewWideIntObj |
---|
2312 | |
---|
2313 | Tcl_Obj * |
---|
2314 | Tcl_NewWideIntObj( |
---|
2315 | register Tcl_WideInt wideValue) |
---|
2316 | /* Wide integer used to initialize the new |
---|
2317 | * object. */ |
---|
2318 | { |
---|
2319 | return Tcl_DbNewWideIntObj(wideValue, "unknown", 0); |
---|
2320 | } |
---|
2321 | |
---|
2322 | #else /* if not TCL_MEM_DEBUG */ |
---|
2323 | |
---|
2324 | Tcl_Obj * |
---|
2325 | Tcl_NewWideIntObj( |
---|
2326 | register Tcl_WideInt wideValue) |
---|
2327 | /* Wide integer used to initialize the new |
---|
2328 | * object. */ |
---|
2329 | { |
---|
2330 | register Tcl_Obj *objPtr; |
---|
2331 | |
---|
2332 | TclNewObj(objPtr); |
---|
2333 | Tcl_SetWideIntObj(objPtr, wideValue); |
---|
2334 | return objPtr; |
---|
2335 | } |
---|
2336 | #endif /* if TCL_MEM_DEBUG */ |
---|
2337 | |
---|
2338 | /* |
---|
2339 | *---------------------------------------------------------------------- |
---|
2340 | * |
---|
2341 | * Tcl_DbNewWideIntObj -- |
---|
2342 | * |
---|
2343 | * If a client is compiled with TCL_MEM_DEBUG defined, calls to |
---|
2344 | * Tcl_NewWideIntObj to create new wide integer end up calling the |
---|
2345 | * debugging function Tcl_DbNewWideIntObj instead. We provide two |
---|
2346 | * implementations of Tcl_DbNewWideIntObj so that whether the Tcl core is |
---|
2347 | * compiled to do memory debugging of the core is independent of whether |
---|
2348 | * a client requests debugging for itself. |
---|
2349 | * |
---|
2350 | * When the core is compiled with TCL_MEM_DEBUG defined, |
---|
2351 | * Tcl_DbNewWideIntObj calls Tcl_DbCkalloc directly with the file name |
---|
2352 | * and line number from its caller. This simplifies debugging since then |
---|
2353 | * the checkmem command will report the caller's file name and line |
---|
2354 | * number when reporting objects that haven't been freed. |
---|
2355 | * |
---|
2356 | * Otherwise, when the core is compiled without TCL_MEM_DEBUG defined, |
---|
2357 | * this function just returns the result of calling Tcl_NewWideIntObj. |
---|
2358 | * |
---|
2359 | * Results: |
---|
2360 | * The newly created wide integer object is returned. This object will |
---|
2361 | * have an invalid string representation. The returned object has ref |
---|
2362 | * count 0. |
---|
2363 | * |
---|
2364 | * Side effects: |
---|
2365 | * Allocates memory. |
---|
2366 | * |
---|
2367 | *---------------------------------------------------------------------- |
---|
2368 | */ |
---|
2369 | |
---|
2370 | #ifdef TCL_MEM_DEBUG |
---|
2371 | |
---|
2372 | Tcl_Obj * |
---|
2373 | Tcl_DbNewWideIntObj( |
---|
2374 | register Tcl_WideInt wideValue, |
---|
2375 | /* Wide integer used to initialize the new |
---|
2376 | * object. */ |
---|
2377 | CONST char *file, /* The name of the source file calling this |
---|
2378 | * function; used for debugging. */ |
---|
2379 | int line) /* Line number in the source file; used for |
---|
2380 | * debugging. */ |
---|
2381 | { |
---|
2382 | register Tcl_Obj *objPtr; |
---|
2383 | |
---|
2384 | TclDbNewObj(objPtr, file, line); |
---|
2385 | Tcl_SetWideIntObj(objPtr, wideValue); |
---|
2386 | return objPtr; |
---|
2387 | } |
---|
2388 | |
---|
2389 | #else /* if not TCL_MEM_DEBUG */ |
---|
2390 | |
---|
2391 | Tcl_Obj * |
---|
2392 | Tcl_DbNewWideIntObj( |
---|
2393 | register Tcl_WideInt wideValue, |
---|
2394 | /* Long integer used to initialize the new |
---|
2395 | * object. */ |
---|
2396 | CONST char *file, /* The name of the source file calling this |
---|
2397 | * function; used for debugging. */ |
---|
2398 | int line) /* Line number in the source file; used for |
---|
2399 | * debugging. */ |
---|
2400 | { |
---|
2401 | return Tcl_NewWideIntObj(wideValue); |
---|
2402 | } |
---|
2403 | #endif /* TCL_MEM_DEBUG */ |
---|
2404 | |
---|
2405 | /* |
---|
2406 | *---------------------------------------------------------------------- |
---|
2407 | * |
---|
2408 | * Tcl_SetWideIntObj -- |
---|
2409 | * |
---|
2410 | * Modify an object to be a wide integer object and to have the specified |
---|
2411 | * wide integer value. |
---|
2412 | * |
---|
2413 | * Results: |
---|
2414 | * None. |
---|
2415 | * |
---|
2416 | * Side effects: |
---|
2417 | * The object's old string rep, if any, is freed. Also, any old internal |
---|
2418 | * rep is freed. |
---|
2419 | * |
---|
2420 | *---------------------------------------------------------------------- |
---|
2421 | */ |
---|
2422 | |
---|
2423 | void |
---|
2424 | Tcl_SetWideIntObj( |
---|
2425 | register Tcl_Obj *objPtr, /* Object w. internal rep to init. */ |
---|
2426 | register Tcl_WideInt wideValue) |
---|
2427 | /* Wide integer used to initialize the |
---|
2428 | * object's value. */ |
---|
2429 | { |
---|
2430 | if (Tcl_IsShared(objPtr)) { |
---|
2431 | Tcl_Panic("%s called with shared object", "Tcl_SetWideIntObj"); |
---|
2432 | } |
---|
2433 | |
---|
2434 | if ((wideValue >= (Tcl_WideInt) LONG_MIN) |
---|
2435 | && (wideValue <= (Tcl_WideInt) LONG_MAX)) { |
---|
2436 | TclSetLongObj(objPtr, (long) wideValue); |
---|
2437 | } else { |
---|
2438 | #ifndef NO_WIDE_TYPE |
---|
2439 | TclSetWideIntObj(objPtr, wideValue); |
---|
2440 | #else |
---|
2441 | mp_int big; |
---|
2442 | |
---|
2443 | TclBNInitBignumFromWideInt(&big, wideValue); |
---|
2444 | Tcl_SetBignumObj(objPtr, &big); |
---|
2445 | #endif |
---|
2446 | } |
---|
2447 | } |
---|
2448 | |
---|
2449 | /* |
---|
2450 | *---------------------------------------------------------------------- |
---|
2451 | * |
---|
2452 | * Tcl_GetWideIntFromObj -- |
---|
2453 | * |
---|
2454 | * Attempt to return a wide integer from the Tcl object "objPtr". If the |
---|
2455 | * object is not already a wide int object, an attempt will be made to |
---|
2456 | * convert it to one. |
---|
2457 | * |
---|
2458 | * Results: |
---|
2459 | * The return value is a standard Tcl object result. If an error occurs |
---|
2460 | * during conversion, an error message is left in the interpreter's |
---|
2461 | * result unless "interp" is NULL. |
---|
2462 | * |
---|
2463 | * Side effects: |
---|
2464 | * If the object is not already an int object, the conversion will free |
---|
2465 | * any old internal representation. |
---|
2466 | * |
---|
2467 | *---------------------------------------------------------------------- |
---|
2468 | */ |
---|
2469 | |
---|
2470 | int |
---|
2471 | Tcl_GetWideIntFromObj( |
---|
2472 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
2473 | register Tcl_Obj *objPtr, /* Object from which to get a wide int. */ |
---|
2474 | register Tcl_WideInt *wideIntPtr) |
---|
2475 | /* Place to store resulting long. */ |
---|
2476 | { |
---|
2477 | do { |
---|
2478 | #ifndef NO_WIDE_TYPE |
---|
2479 | if (objPtr->typePtr == &tclWideIntType) { |
---|
2480 | *wideIntPtr = objPtr->internalRep.wideValue; |
---|
2481 | return TCL_OK; |
---|
2482 | } |
---|
2483 | #endif |
---|
2484 | if (objPtr->typePtr == &tclIntType) { |
---|
2485 | *wideIntPtr = (Tcl_WideInt) objPtr->internalRep.longValue; |
---|
2486 | return TCL_OK; |
---|
2487 | } |
---|
2488 | if (objPtr->typePtr == &tclDoubleType) { |
---|
2489 | if (interp != NULL) { |
---|
2490 | Tcl_Obj *msg; |
---|
2491 | |
---|
2492 | TclNewLiteralStringObj(msg, "expected integer but got \""); |
---|
2493 | Tcl_AppendObjToObj(msg, objPtr); |
---|
2494 | Tcl_AppendToObj(msg, "\"", -1); |
---|
2495 | Tcl_SetObjResult(interp, msg); |
---|
2496 | } |
---|
2497 | return TCL_ERROR; |
---|
2498 | } |
---|
2499 | if (objPtr->typePtr == &tclBignumType) { |
---|
2500 | /* |
---|
2501 | * Must check for those bignum values that can fit in a |
---|
2502 | * Tcl_WideInt, even when auto-narrowing is enabled. |
---|
2503 | */ |
---|
2504 | |
---|
2505 | mp_int big; |
---|
2506 | |
---|
2507 | UNPACK_BIGNUM(objPtr, big); |
---|
2508 | if ((size_t)(big.used) <= (CHAR_BIT * sizeof(Tcl_WideInt) |
---|
2509 | + DIGIT_BIT - 1) / DIGIT_BIT) { |
---|
2510 | Tcl_WideUInt value = 0; |
---|
2511 | unsigned long numBytes = sizeof(Tcl_WideInt); |
---|
2512 | Tcl_WideInt scratch; |
---|
2513 | unsigned char *bytes = (unsigned char *) &scratch; |
---|
2514 | |
---|
2515 | if (mp_to_unsigned_bin_n(&big, bytes, &numBytes) == MP_OKAY) { |
---|
2516 | while (numBytes-- > 0) { |
---|
2517 | value = (value << CHAR_BIT) | *bytes++; |
---|
2518 | } |
---|
2519 | if (big.sign) { |
---|
2520 | *wideIntPtr = - (Tcl_WideInt) value; |
---|
2521 | } else { |
---|
2522 | *wideIntPtr = (Tcl_WideInt) value; |
---|
2523 | } |
---|
2524 | return TCL_OK; |
---|
2525 | } |
---|
2526 | } |
---|
2527 | if (interp != NULL) { |
---|
2528 | char *s = "integer value too large to represent"; |
---|
2529 | Tcl_Obj* msg = Tcl_NewStringObj(s, -1); |
---|
2530 | |
---|
2531 | Tcl_SetObjResult(interp, msg); |
---|
2532 | Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", s, NULL); |
---|
2533 | } |
---|
2534 | return TCL_ERROR; |
---|
2535 | } |
---|
2536 | } while (TclParseNumber(interp, objPtr, "integer", NULL, -1, NULL, |
---|
2537 | TCL_PARSE_INTEGER_ONLY)==TCL_OK); |
---|
2538 | return TCL_ERROR; |
---|
2539 | } |
---|
2540 | #ifndef NO_WIDE_TYPE |
---|
2541 | |
---|
2542 | /* |
---|
2543 | *---------------------------------------------------------------------- |
---|
2544 | * |
---|
2545 | * SetWideIntFromAny -- |
---|
2546 | * |
---|
2547 | * Attempts to force the internal representation for a Tcl object to |
---|
2548 | * tclWideIntType, specifically. |
---|
2549 | * |
---|
2550 | * Results: |
---|
2551 | * The return value is a standard object Tcl result. If an error occurs |
---|
2552 | * during conversion, an error message is left in the interpreter's |
---|
2553 | * result unless "interp" is NULL. |
---|
2554 | * |
---|
2555 | *---------------------------------------------------------------------- |
---|
2556 | */ |
---|
2557 | |
---|
2558 | static int |
---|
2559 | SetWideIntFromAny( |
---|
2560 | Tcl_Interp *interp, /* Tcl interpreter */ |
---|
2561 | Tcl_Obj *objPtr) /* Pointer to the object to convert */ |
---|
2562 | { |
---|
2563 | Tcl_WideInt w; |
---|
2564 | return Tcl_GetWideIntFromObj(interp, objPtr, &w); |
---|
2565 | } |
---|
2566 | #endif /* !NO_WIDE_TYPE */ |
---|
2567 | |
---|
2568 | /* |
---|
2569 | *---------------------------------------------------------------------- |
---|
2570 | * |
---|
2571 | * FreeBignum -- |
---|
2572 | * |
---|
2573 | * This function frees the internal rep of a bignum. |
---|
2574 | * |
---|
2575 | * Results: |
---|
2576 | * None. |
---|
2577 | * |
---|
2578 | *---------------------------------------------------------------------- |
---|
2579 | */ |
---|
2580 | |
---|
2581 | static void |
---|
2582 | FreeBignum( |
---|
2583 | Tcl_Obj *objPtr) |
---|
2584 | { |
---|
2585 | mp_int toFree; /* Bignum to free */ |
---|
2586 | |
---|
2587 | UNPACK_BIGNUM(objPtr, toFree); |
---|
2588 | mp_clear(&toFree); |
---|
2589 | if ((long)(objPtr->internalRep.ptrAndLongRep.value) < 0) { |
---|
2590 | ckfree((char *)objPtr->internalRep.ptrAndLongRep.ptr); |
---|
2591 | } |
---|
2592 | } |
---|
2593 | |
---|
2594 | /* |
---|
2595 | *---------------------------------------------------------------------- |
---|
2596 | * |
---|
2597 | * DupBignum -- |
---|
2598 | * |
---|
2599 | * This function duplicates the internal rep of a bignum. |
---|
2600 | * |
---|
2601 | * Results: |
---|
2602 | * None. |
---|
2603 | * |
---|
2604 | * Side effects: |
---|
2605 | * The destination object receies a copy of the source object |
---|
2606 | * |
---|
2607 | *---------------------------------------------------------------------- |
---|
2608 | */ |
---|
2609 | |
---|
2610 | static void |
---|
2611 | DupBignum( |
---|
2612 | Tcl_Obj *srcPtr, |
---|
2613 | Tcl_Obj *copyPtr) |
---|
2614 | { |
---|
2615 | mp_int bignumVal; |
---|
2616 | mp_int bignumCopy; |
---|
2617 | |
---|
2618 | copyPtr->typePtr = &tclBignumType; |
---|
2619 | UNPACK_BIGNUM(srcPtr, bignumVal); |
---|
2620 | if (mp_init_copy(&bignumCopy, &bignumVal) != MP_OKAY) { |
---|
2621 | Tcl_Panic("initialization failure in DupBignum"); |
---|
2622 | } |
---|
2623 | PACK_BIGNUM(bignumCopy, copyPtr); |
---|
2624 | } |
---|
2625 | |
---|
2626 | /* |
---|
2627 | *---------------------------------------------------------------------- |
---|
2628 | * |
---|
2629 | * UpdateStringOfBignum -- |
---|
2630 | * |
---|
2631 | * This function updates the string representation of a bignum object. |
---|
2632 | * |
---|
2633 | * Results: |
---|
2634 | * None. |
---|
2635 | * |
---|
2636 | * Side effects: |
---|
2637 | * The object's string is set to whatever results from the bignum- |
---|
2638 | * to-string conversion. |
---|
2639 | * |
---|
2640 | * The object's existing string representation is NOT freed; memory will leak |
---|
2641 | * if the string rep is still valid at the time this function is called. |
---|
2642 | * |
---|
2643 | *---------------------------------------------------------------------- |
---|
2644 | */ |
---|
2645 | |
---|
2646 | static void |
---|
2647 | UpdateStringOfBignum( |
---|
2648 | Tcl_Obj *objPtr) |
---|
2649 | { |
---|
2650 | mp_int bignumVal; |
---|
2651 | int size; |
---|
2652 | int status; |
---|
2653 | char* stringVal; |
---|
2654 | |
---|
2655 | UNPACK_BIGNUM(objPtr, bignumVal); |
---|
2656 | status = mp_radix_size(&bignumVal, 10, &size); |
---|
2657 | if (status != MP_OKAY) { |
---|
2658 | Tcl_Panic("radix size failure in UpdateStringOfBignum"); |
---|
2659 | } |
---|
2660 | if (size == 3) { |
---|
2661 | /* |
---|
2662 | * mp_radix_size() returns 3 when more than INT_MAX bytes would be |
---|
2663 | * needed to hold the string rep (because mp_radix_size ignores |
---|
2664 | * integer overflow issues). When we know the string rep will be more |
---|
2665 | * than 3, we can conclude the string rep would overflow our string |
---|
2666 | * length limits. |
---|
2667 | * |
---|
2668 | * Note that so long as we enforce our bignums to the size that fits |
---|
2669 | * in a packed bignum, this branch will never be taken. |
---|
2670 | */ |
---|
2671 | |
---|
2672 | Tcl_Panic("UpdateStringOfBignum: string length limit exceeded"); |
---|
2673 | } |
---|
2674 | stringVal = ckalloc((size_t) size); |
---|
2675 | status = mp_toradix_n(&bignumVal, stringVal, 10, size); |
---|
2676 | if (status != MP_OKAY) { |
---|
2677 | Tcl_Panic("conversion failure in UpdateStringOfBignum"); |
---|
2678 | } |
---|
2679 | objPtr->bytes = stringVal; |
---|
2680 | objPtr->length = size - 1; /* size includes a trailing null byte */ |
---|
2681 | } |
---|
2682 | |
---|
2683 | /* |
---|
2684 | *---------------------------------------------------------------------- |
---|
2685 | * |
---|
2686 | * Tcl_NewBignumObj -- |
---|
2687 | * |
---|
2688 | * Creates an initializes a bignum object. |
---|
2689 | * |
---|
2690 | * Results: |
---|
2691 | * Returns the newly created object. |
---|
2692 | * |
---|
2693 | * Side effects: |
---|
2694 | * The bignum value is cleared, since ownership has transferred to Tcl. |
---|
2695 | * |
---|
2696 | *---------------------------------------------------------------------- |
---|
2697 | */ |
---|
2698 | |
---|
2699 | #ifdef TCL_MEM_DEBUG |
---|
2700 | #undef Tcl_NewBignumObj |
---|
2701 | |
---|
2702 | Tcl_Obj * |
---|
2703 | Tcl_NewBignumObj( |
---|
2704 | mp_int *bignumValue) |
---|
2705 | { |
---|
2706 | return Tcl_DbNewBignumObj(bignumValue, "unknown", 0); |
---|
2707 | } |
---|
2708 | #else |
---|
2709 | Tcl_Obj * |
---|
2710 | Tcl_NewBignumObj( |
---|
2711 | mp_int *bignumValue) |
---|
2712 | { |
---|
2713 | Tcl_Obj* objPtr; |
---|
2714 | |
---|
2715 | TclNewObj(objPtr); |
---|
2716 | Tcl_SetBignumObj(objPtr, bignumValue); |
---|
2717 | return objPtr; |
---|
2718 | } |
---|
2719 | #endif |
---|
2720 | |
---|
2721 | /* |
---|
2722 | *---------------------------------------------------------------------- |
---|
2723 | * |
---|
2724 | * Tcl_DbNewBignumObj -- |
---|
2725 | * |
---|
2726 | * This function is normally called when debugging: that is, when |
---|
2727 | * TCL_MEM_DEBUG is defined. It constructs a bignum object, recording the |
---|
2728 | * creation point so that [memory active] can report it. |
---|
2729 | * |
---|
2730 | * Results: |
---|
2731 | * Returns the newly created object. |
---|
2732 | * |
---|
2733 | * Side effects: |
---|
2734 | * The bignum value is cleared, since ownership has transferred to Tcl. |
---|
2735 | * |
---|
2736 | *---------------------------------------------------------------------- |
---|
2737 | */ |
---|
2738 | |
---|
2739 | #ifdef TCL_MEM_DEBUG |
---|
2740 | Tcl_Obj * |
---|
2741 | Tcl_DbNewBignumObj( |
---|
2742 | mp_int *bignumValue, |
---|
2743 | CONST char *file, |
---|
2744 | int line) |
---|
2745 | { |
---|
2746 | Tcl_Obj *objPtr; |
---|
2747 | |
---|
2748 | TclDbNewObj(objPtr, file, line); |
---|
2749 | Tcl_SetBignumObj(objPtr, bignumValue); |
---|
2750 | return objPtr; |
---|
2751 | } |
---|
2752 | #else |
---|
2753 | Tcl_Obj * |
---|
2754 | Tcl_DbNewBignumObj( |
---|
2755 | mp_int *bignumValue, |
---|
2756 | CONST char *file, |
---|
2757 | int line) |
---|
2758 | { |
---|
2759 | return Tcl_NewBignumObj(bignumValue); |
---|
2760 | } |
---|
2761 | #endif |
---|
2762 | |
---|
2763 | /* |
---|
2764 | *---------------------------------------------------------------------- |
---|
2765 | * |
---|
2766 | * GetBignumFromObj -- |
---|
2767 | * |
---|
2768 | * This function retrieves a 'bignum' value from a Tcl object, converting |
---|
2769 | * the object if necessary. Either copies or transfers the mp_int value |
---|
2770 | * depending on the copy flag value passed in. |
---|
2771 | * |
---|
2772 | * Results: |
---|
2773 | * Returns TCL_OK if the conversion is successful, TCL_ERROR otherwise. |
---|
2774 | * |
---|
2775 | * Side effects: |
---|
2776 | * A copy of bignum is stored in *bignumValue, which is expected to be |
---|
2777 | * uninitialized or cleared. If conversion fails, and the 'interp' |
---|
2778 | * argument is not NULL, an error message is stored in the interpreter |
---|
2779 | * result. |
---|
2780 | * |
---|
2781 | *---------------------------------------------------------------------- |
---|
2782 | */ |
---|
2783 | |
---|
2784 | static int |
---|
2785 | GetBignumFromObj( |
---|
2786 | Tcl_Interp *interp, /* Tcl interpreter for error reporting */ |
---|
2787 | Tcl_Obj *objPtr, /* Object to read */ |
---|
2788 | int copy, /* Whether to copy the returned bignum value */ |
---|
2789 | mp_int *bignumValue) /* Returned bignum value. */ |
---|
2790 | { |
---|
2791 | do { |
---|
2792 | if (objPtr->typePtr == &tclBignumType) { |
---|
2793 | if (copy || Tcl_IsShared(objPtr)) { |
---|
2794 | mp_int temp; |
---|
2795 | UNPACK_BIGNUM(objPtr, temp); |
---|
2796 | mp_init_copy(bignumValue, &temp); |
---|
2797 | } else { |
---|
2798 | UNPACK_BIGNUM(objPtr, *bignumValue); |
---|
2799 | objPtr->internalRep.ptrAndLongRep.ptr = NULL; |
---|
2800 | objPtr->internalRep.ptrAndLongRep.value = 0; |
---|
2801 | objPtr->typePtr = NULL; |
---|
2802 | if (objPtr->bytes == NULL) { |
---|
2803 | TclInitStringRep(objPtr, tclEmptyStringRep, 0); |
---|
2804 | } |
---|
2805 | } |
---|
2806 | return TCL_OK; |
---|
2807 | } |
---|
2808 | if (objPtr->typePtr == &tclIntType) { |
---|
2809 | TclBNInitBignumFromLong(bignumValue, objPtr->internalRep.longValue); |
---|
2810 | return TCL_OK; |
---|
2811 | } |
---|
2812 | #ifndef NO_WIDE_TYPE |
---|
2813 | if (objPtr->typePtr == &tclWideIntType) { |
---|
2814 | TclBNInitBignumFromWideInt(bignumValue, |
---|
2815 | objPtr->internalRep.wideValue); |
---|
2816 | return TCL_OK; |
---|
2817 | } |
---|
2818 | #endif |
---|
2819 | if (objPtr->typePtr == &tclDoubleType) { |
---|
2820 | if (interp != NULL) { |
---|
2821 | Tcl_Obj *msg; |
---|
2822 | |
---|
2823 | TclNewLiteralStringObj(msg, "expected integer but got \""); |
---|
2824 | Tcl_AppendObjToObj(msg, objPtr); |
---|
2825 | Tcl_AppendToObj(msg, "\"", -1); |
---|
2826 | Tcl_SetObjResult(interp, msg); |
---|
2827 | } |
---|
2828 | return TCL_ERROR; |
---|
2829 | } |
---|
2830 | } while (TclParseNumber(interp, objPtr, "integer", NULL, -1, NULL, |
---|
2831 | TCL_PARSE_INTEGER_ONLY)==TCL_OK); |
---|
2832 | return TCL_ERROR; |
---|
2833 | } |
---|
2834 | |
---|
2835 | /* |
---|
2836 | *---------------------------------------------------------------------- |
---|
2837 | * |
---|
2838 | * Tcl_GetBignumFromObj -- |
---|
2839 | * |
---|
2840 | * This function retrieves a 'bignum' value from a Tcl object, converting |
---|
2841 | * the object if necessary. |
---|
2842 | * |
---|
2843 | * Results: |
---|
2844 | * Returns TCL_OK if the conversion is successful, TCL_ERROR otherwise. |
---|
2845 | * |
---|
2846 | * Side effects: |
---|
2847 | * A copy of bignum is stored in *bignumValue, which is expected to be |
---|
2848 | * uninitialized or cleared. If conversion fails, an the 'interp' |
---|
2849 | * argument is not NULL, an error message is stored in the interpreter |
---|
2850 | * result. |
---|
2851 | * |
---|
2852 | * It is expected that the caller will NOT have invoked mp_init on the |
---|
2853 | * bignum value before passing it in. Tcl will initialize the mp_int as |
---|
2854 | * it sets the value. The value is a copy of the value in objPtr, so it |
---|
2855 | * becomes the responsibility of the caller to call mp_clear on it. |
---|
2856 | * |
---|
2857 | *---------------------------------------------------------------------- |
---|
2858 | */ |
---|
2859 | |
---|
2860 | int |
---|
2861 | Tcl_GetBignumFromObj( |
---|
2862 | Tcl_Interp *interp, /* Tcl interpreter for error reporting */ |
---|
2863 | Tcl_Obj *objPtr, /* Object to read */ |
---|
2864 | mp_int *bignumValue) /* Returned bignum value. */ |
---|
2865 | { |
---|
2866 | return GetBignumFromObj(interp, objPtr, 1, bignumValue); |
---|
2867 | } |
---|
2868 | |
---|
2869 | /* |
---|
2870 | *---------------------------------------------------------------------- |
---|
2871 | * |
---|
2872 | * Tcl_TakeBignumFromObj -- |
---|
2873 | * |
---|
2874 | * This function retrieves a 'bignum' value from a Tcl object, converting |
---|
2875 | * the object if necessary. |
---|
2876 | * |
---|
2877 | * Results: |
---|
2878 | * Returns TCL_OK if the conversion is successful, TCL_ERROR otherwise. |
---|
2879 | * |
---|
2880 | * Side effects: |
---|
2881 | * A copy of bignum is stored in *bignumValue, which is expected to be |
---|
2882 | * uninitialized or cleared. If conversion fails, an the 'interp' |
---|
2883 | * argument is not NULL, an error message is stored in the interpreter |
---|
2884 | * result. |
---|
2885 | * |
---|
2886 | * It is expected that the caller will NOT have invoked mp_init on the |
---|
2887 | * bignum value before passing it in. Tcl will initialize the mp_int as |
---|
2888 | * it sets the value. The value is transferred from the internals of |
---|
2889 | * objPtr to the caller, passing responsibility of the caller to call |
---|
2890 | * mp_clear on it. The objPtr is cleared to hold an empty value. |
---|
2891 | * |
---|
2892 | *---------------------------------------------------------------------- |
---|
2893 | */ |
---|
2894 | |
---|
2895 | int |
---|
2896 | Tcl_TakeBignumFromObj( |
---|
2897 | Tcl_Interp *interp, /* Tcl interpreter for error reporting */ |
---|
2898 | Tcl_Obj *objPtr, /* Object to read */ |
---|
2899 | mp_int *bignumValue) /* Returned bignum value. */ |
---|
2900 | { |
---|
2901 | return GetBignumFromObj(interp, objPtr, 0, bignumValue); |
---|
2902 | } |
---|
2903 | |
---|
2904 | /* |
---|
2905 | *---------------------------------------------------------------------- |
---|
2906 | * |
---|
2907 | * Tcl_SetBignumObj -- |
---|
2908 | * |
---|
2909 | * This function sets the value of a Tcl_Obj to a large integer. |
---|
2910 | * |
---|
2911 | * Results: |
---|
2912 | * None. |
---|
2913 | * |
---|
2914 | * Side effects: |
---|
2915 | * Object value is stored. The bignum value is cleared, since ownership |
---|
2916 | * has transferred to Tcl. |
---|
2917 | * |
---|
2918 | *---------------------------------------------------------------------- |
---|
2919 | */ |
---|
2920 | |
---|
2921 | void |
---|
2922 | Tcl_SetBignumObj( |
---|
2923 | Tcl_Obj *objPtr, /* Object to set */ |
---|
2924 | mp_int *bignumValue) /* Value to store */ |
---|
2925 | { |
---|
2926 | if (Tcl_IsShared(objPtr)) { |
---|
2927 | Tcl_Panic("%s called with shared object", "Tcl_SetBignumObj"); |
---|
2928 | } |
---|
2929 | if ((size_t)(bignumValue->used) |
---|
2930 | <= (CHAR_BIT * sizeof(long) + DIGIT_BIT - 1) / DIGIT_BIT) { |
---|
2931 | unsigned long value = 0, numBytes = sizeof(long); |
---|
2932 | long scratch; |
---|
2933 | unsigned char *bytes = (unsigned char *)&scratch; |
---|
2934 | if (mp_to_unsigned_bin_n(bignumValue, bytes, &numBytes) != MP_OKAY) { |
---|
2935 | goto tooLargeForLong; |
---|
2936 | } |
---|
2937 | while (numBytes-- > 0) { |
---|
2938 | value = (value << CHAR_BIT) | *bytes++; |
---|
2939 | } |
---|
2940 | if (value > (((~(unsigned long)0) >> 1) + bignumValue->sign)) { |
---|
2941 | goto tooLargeForLong; |
---|
2942 | } |
---|
2943 | if (bignumValue->sign) { |
---|
2944 | TclSetLongObj(objPtr, -(long)value); |
---|
2945 | } else { |
---|
2946 | TclSetLongObj(objPtr, (long)value); |
---|
2947 | } |
---|
2948 | mp_clear(bignumValue); |
---|
2949 | return; |
---|
2950 | } |
---|
2951 | tooLargeForLong: |
---|
2952 | #ifndef NO_WIDE_TYPE |
---|
2953 | if ((size_t)(bignumValue->used) |
---|
2954 | <= (CHAR_BIT * sizeof(Tcl_WideInt) + DIGIT_BIT - 1) / DIGIT_BIT) { |
---|
2955 | Tcl_WideUInt value = 0; |
---|
2956 | unsigned long numBytes = sizeof(Tcl_WideInt); |
---|
2957 | Tcl_WideInt scratch; |
---|
2958 | unsigned char *bytes = (unsigned char *)&scratch; |
---|
2959 | if (mp_to_unsigned_bin_n(bignumValue, bytes, &numBytes) != MP_OKAY) { |
---|
2960 | goto tooLargeForWide; |
---|
2961 | } |
---|
2962 | while (numBytes-- > 0) { |
---|
2963 | value = (value << CHAR_BIT) | *bytes++; |
---|
2964 | } |
---|
2965 | if (value > (((~(Tcl_WideUInt)0) >> 1) + bignumValue->sign)) { |
---|
2966 | goto tooLargeForWide; |
---|
2967 | } |
---|
2968 | if (bignumValue->sign) { |
---|
2969 | TclSetWideIntObj(objPtr, -(Tcl_WideInt)value); |
---|
2970 | } else { |
---|
2971 | TclSetWideIntObj(objPtr, (Tcl_WideInt)value); |
---|
2972 | } |
---|
2973 | mp_clear(bignumValue); |
---|
2974 | return; |
---|
2975 | } |
---|
2976 | tooLargeForWide: |
---|
2977 | #endif |
---|
2978 | TclInvalidateStringRep(objPtr); |
---|
2979 | TclFreeIntRep(objPtr); |
---|
2980 | TclSetBignumIntRep(objPtr, bignumValue); |
---|
2981 | } |
---|
2982 | |
---|
2983 | void |
---|
2984 | TclSetBignumIntRep( |
---|
2985 | Tcl_Obj *objPtr, |
---|
2986 | mp_int *bignumValue) |
---|
2987 | { |
---|
2988 | objPtr->typePtr = &tclBignumType; |
---|
2989 | PACK_BIGNUM(*bignumValue, objPtr); |
---|
2990 | |
---|
2991 | /* |
---|
2992 | * Clear the mp_int value. |
---|
2993 | * Don't call mp_clear() because it would free the digit array |
---|
2994 | * we just packed into the Tcl_Obj. |
---|
2995 | */ |
---|
2996 | |
---|
2997 | bignumValue->dp = NULL; |
---|
2998 | bignumValue->alloc = bignumValue->used = 0; |
---|
2999 | bignumValue->sign = MP_NEG; |
---|
3000 | } |
---|
3001 | |
---|
3002 | /* |
---|
3003 | *---------------------------------------------------------------------- |
---|
3004 | * |
---|
3005 | * TclGetNumberFromObj -- |
---|
3006 | * |
---|
3007 | * Results: |
---|
3008 | * |
---|
3009 | * Side effects: |
---|
3010 | * |
---|
3011 | *---------------------------------------------------------------------- |
---|
3012 | */ |
---|
3013 | |
---|
3014 | int TclGetNumberFromObj( |
---|
3015 | Tcl_Interp *interp, |
---|
3016 | Tcl_Obj *objPtr, |
---|
3017 | ClientData *clientDataPtr, |
---|
3018 | int *typePtr) |
---|
3019 | { |
---|
3020 | do { |
---|
3021 | if (objPtr->typePtr == &tclDoubleType) { |
---|
3022 | if (TclIsNaN(objPtr->internalRep.doubleValue)) { |
---|
3023 | *typePtr = TCL_NUMBER_NAN; |
---|
3024 | } else { |
---|
3025 | *typePtr = TCL_NUMBER_DOUBLE; |
---|
3026 | } |
---|
3027 | *clientDataPtr = &(objPtr->internalRep.doubleValue); |
---|
3028 | return TCL_OK; |
---|
3029 | } |
---|
3030 | if (objPtr->typePtr == &tclIntType) { |
---|
3031 | *typePtr = TCL_NUMBER_LONG; |
---|
3032 | *clientDataPtr = &(objPtr->internalRep.longValue); |
---|
3033 | return TCL_OK; |
---|
3034 | } |
---|
3035 | #ifndef NO_WIDE_TYPE |
---|
3036 | if (objPtr->typePtr == &tclWideIntType) { |
---|
3037 | *typePtr = TCL_NUMBER_WIDE; |
---|
3038 | *clientDataPtr = &(objPtr->internalRep.wideValue); |
---|
3039 | return TCL_OK; |
---|
3040 | } |
---|
3041 | #endif |
---|
3042 | if (objPtr->typePtr == &tclBignumType) { |
---|
3043 | static Tcl_ThreadDataKey bignumKey; |
---|
3044 | mp_int *bigPtr = Tcl_GetThreadData(&bignumKey, |
---|
3045 | (int) sizeof(mp_int)); |
---|
3046 | UNPACK_BIGNUM( objPtr, *bigPtr ); |
---|
3047 | *typePtr = TCL_NUMBER_BIG; |
---|
3048 | *clientDataPtr = bigPtr; |
---|
3049 | return TCL_OK; |
---|
3050 | } |
---|
3051 | } while (TCL_OK == |
---|
3052 | TclParseNumber(interp, objPtr, "number", NULL, -1, NULL, 0)); |
---|
3053 | return TCL_ERROR; |
---|
3054 | } |
---|
3055 | |
---|
3056 | /* |
---|
3057 | *---------------------------------------------------------------------- |
---|
3058 | * |
---|
3059 | * Tcl_DbIncrRefCount -- |
---|
3060 | * |
---|
3061 | * This function is normally called when debugging: i.e., when |
---|
3062 | * TCL_MEM_DEBUG is defined. This checks to see whether or not the memory |
---|
3063 | * has been freed before incrementing the ref count. |
---|
3064 | * |
---|
3065 | * When TCL_MEM_DEBUG is not defined, this function just increments the |
---|
3066 | * reference count of the object. |
---|
3067 | * |
---|
3068 | * Results: |
---|
3069 | * None. |
---|
3070 | * |
---|
3071 | * Side effects: |
---|
3072 | * The object's ref count is incremented. |
---|
3073 | * |
---|
3074 | *---------------------------------------------------------------------- |
---|
3075 | */ |
---|
3076 | |
---|
3077 | void |
---|
3078 | Tcl_DbIncrRefCount( |
---|
3079 | register Tcl_Obj *objPtr, /* The object we are registering a reference |
---|
3080 | * to. */ |
---|
3081 | CONST char *file, /* The name of the source file calling this |
---|
3082 | * function; used for debugging. */ |
---|
3083 | int line) /* Line number in the source file; used for |
---|
3084 | * debugging. */ |
---|
3085 | { |
---|
3086 | #ifdef TCL_MEM_DEBUG |
---|
3087 | if (objPtr->refCount == 0x61616161) { |
---|
3088 | fprintf(stderr, "file = %s, line = %d\n", file, line); |
---|
3089 | fflush(stderr); |
---|
3090 | Tcl_Panic("incrementing refCount of previously disposed object"); |
---|
3091 | } |
---|
3092 | |
---|
3093 | # ifdef TCL_THREADS |
---|
3094 | /* |
---|
3095 | * Check to make sure that the Tcl_Obj was allocated by the current |
---|
3096 | * thread. Don't do this check when shutting down since thread local |
---|
3097 | * storage can be finalized before the last Tcl_Obj is freed. |
---|
3098 | */ |
---|
3099 | |
---|
3100 | if (!TclInExit()) { |
---|
3101 | Tcl_HashTable *tablePtr; |
---|
3102 | Tcl_HashEntry *hPtr; |
---|
3103 | ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); |
---|
3104 | |
---|
3105 | tablePtr = tsdPtr->objThreadMap; |
---|
3106 | if (!tablePtr) { |
---|
3107 | Tcl_Panic("object table not initialized"); |
---|
3108 | } |
---|
3109 | hPtr = Tcl_FindHashEntry(tablePtr, (char *) objPtr); |
---|
3110 | if (!hPtr) { |
---|
3111 | Tcl_Panic("%s%s", |
---|
3112 | "Trying to incr ref count of " |
---|
3113 | "Tcl_Obj allocated in another thread"); |
---|
3114 | } |
---|
3115 | } |
---|
3116 | # endif |
---|
3117 | #endif |
---|
3118 | ++(objPtr)->refCount; |
---|
3119 | } |
---|
3120 | |
---|
3121 | /* |
---|
3122 | *---------------------------------------------------------------------- |
---|
3123 | * |
---|
3124 | * Tcl_DbDecrRefCount -- |
---|
3125 | * |
---|
3126 | * This function is normally called when debugging: i.e., when |
---|
3127 | * TCL_MEM_DEBUG is defined. This checks to see whether or not the memory |
---|
3128 | * has been freed before decrementing the ref count. |
---|
3129 | * |
---|
3130 | * When TCL_MEM_DEBUG is not defined, this function just decrements the |
---|
3131 | * reference count of the object. |
---|
3132 | * |
---|
3133 | * Results: |
---|
3134 | * None. |
---|
3135 | * |
---|
3136 | * Side effects: |
---|
3137 | * The object's ref count is incremented. |
---|
3138 | * |
---|
3139 | *---------------------------------------------------------------------- |
---|
3140 | */ |
---|
3141 | |
---|
3142 | void |
---|
3143 | Tcl_DbDecrRefCount( |
---|
3144 | register Tcl_Obj *objPtr, /* The object we are releasing a reference |
---|
3145 | * to. */ |
---|
3146 | CONST char *file, /* The name of the source file calling this |
---|
3147 | * function; used for debugging. */ |
---|
3148 | int line) /* Line number in the source file; used for |
---|
3149 | * debugging. */ |
---|
3150 | { |
---|
3151 | #ifdef TCL_MEM_DEBUG |
---|
3152 | if (objPtr->refCount == 0x61616161) { |
---|
3153 | fprintf(stderr, "file = %s, line = %d\n", file, line); |
---|
3154 | fflush(stderr); |
---|
3155 | Tcl_Panic("decrementing refCount of previously disposed object"); |
---|
3156 | } |
---|
3157 | |
---|
3158 | # ifdef TCL_THREADS |
---|
3159 | /* |
---|
3160 | * Check to make sure that the Tcl_Obj was allocated by the current |
---|
3161 | * thread. Don't do this check when shutting down since thread local |
---|
3162 | * storage can be finalized before the last Tcl_Obj is freed. |
---|
3163 | */ |
---|
3164 | |
---|
3165 | if (!TclInExit()) { |
---|
3166 | Tcl_HashTable *tablePtr; |
---|
3167 | Tcl_HashEntry *hPtr; |
---|
3168 | ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); |
---|
3169 | |
---|
3170 | tablePtr = tsdPtr->objThreadMap; |
---|
3171 | if (!tablePtr) { |
---|
3172 | Tcl_Panic("object table not initialized"); |
---|
3173 | } |
---|
3174 | hPtr = Tcl_FindHashEntry(tablePtr, (char *) objPtr); |
---|
3175 | if (!hPtr) { |
---|
3176 | Tcl_Panic("%s%s", |
---|
3177 | "Trying to decr ref count of " |
---|
3178 | "Tcl_Obj allocated in another thread"); |
---|
3179 | } |
---|
3180 | |
---|
3181 | /* If the Tcl_Obj is going to be deleted, remove the entry */ |
---|
3182 | if ((((objPtr)->refCount) - 1) <= 0) { |
---|
3183 | Tcl_DeleteHashEntry(hPtr); |
---|
3184 | } |
---|
3185 | } |
---|
3186 | # endif |
---|
3187 | #endif |
---|
3188 | if (--(objPtr)->refCount <= 0) { |
---|
3189 | TclFreeObj(objPtr); |
---|
3190 | } |
---|
3191 | } |
---|
3192 | |
---|
3193 | /* |
---|
3194 | *---------------------------------------------------------------------- |
---|
3195 | * |
---|
3196 | * Tcl_DbIsShared -- |
---|
3197 | * |
---|
3198 | * This function is normally called when debugging: i.e., when |
---|
3199 | * TCL_MEM_DEBUG is defined. It tests whether the object has a ref count |
---|
3200 | * greater than one. |
---|
3201 | * |
---|
3202 | * When TCL_MEM_DEBUG is not defined, this function just tests if the |
---|
3203 | * object has a ref count greater than one. |
---|
3204 | * |
---|
3205 | * Results: |
---|
3206 | * None. |
---|
3207 | * |
---|
3208 | * Side effects: |
---|
3209 | * None. |
---|
3210 | * |
---|
3211 | *---------------------------------------------------------------------- |
---|
3212 | */ |
---|
3213 | |
---|
3214 | int |
---|
3215 | Tcl_DbIsShared( |
---|
3216 | register Tcl_Obj *objPtr, /* The object to test for being shared. */ |
---|
3217 | CONST char *file, /* The name of the source file calling this |
---|
3218 | * function; used for debugging. */ |
---|
3219 | int line) /* Line number in the source file; used for |
---|
3220 | * debugging. */ |
---|
3221 | { |
---|
3222 | #ifdef TCL_MEM_DEBUG |
---|
3223 | if (objPtr->refCount == 0x61616161) { |
---|
3224 | fprintf(stderr, "file = %s, line = %d\n", file, line); |
---|
3225 | fflush(stderr); |
---|
3226 | Tcl_Panic("checking whether previously disposed object is shared"); |
---|
3227 | } |
---|
3228 | |
---|
3229 | # ifdef TCL_THREADS |
---|
3230 | /* |
---|
3231 | * Check to make sure that the Tcl_Obj was allocated by the current |
---|
3232 | * thread. Don't do this check when shutting down since thread local |
---|
3233 | * storage can be finalized before the last Tcl_Obj is freed. |
---|
3234 | */ |
---|
3235 | |
---|
3236 | if (!TclInExit()) { |
---|
3237 | Tcl_HashTable *tablePtr; |
---|
3238 | Tcl_HashEntry *hPtr; |
---|
3239 | ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); |
---|
3240 | tablePtr = tsdPtr->objThreadMap; |
---|
3241 | if (!tablePtr) { |
---|
3242 | Tcl_Panic("object table not initialized"); |
---|
3243 | } |
---|
3244 | hPtr = Tcl_FindHashEntry(tablePtr, (char *) objPtr); |
---|
3245 | if (!hPtr) { |
---|
3246 | Tcl_Panic("%s%s", |
---|
3247 | "Trying to check shared status of" |
---|
3248 | "Tcl_Obj allocated in another thread"); |
---|
3249 | } |
---|
3250 | } |
---|
3251 | # endif |
---|
3252 | #endif |
---|
3253 | |
---|
3254 | #ifdef TCL_COMPILE_STATS |
---|
3255 | Tcl_MutexLock(&tclObjMutex); |
---|
3256 | if ((objPtr)->refCount <= 1) { |
---|
3257 | tclObjsShared[1]++; |
---|
3258 | } else if ((objPtr)->refCount < TCL_MAX_SHARED_OBJ_STATS) { |
---|
3259 | tclObjsShared[(objPtr)->refCount]++; |
---|
3260 | } else { |
---|
3261 | tclObjsShared[0]++; |
---|
3262 | } |
---|
3263 | Tcl_MutexUnlock(&tclObjMutex); |
---|
3264 | #endif |
---|
3265 | |
---|
3266 | return ((objPtr)->refCount > 1); |
---|
3267 | } |
---|
3268 | |
---|
3269 | /* |
---|
3270 | *---------------------------------------------------------------------- |
---|
3271 | * |
---|
3272 | * Tcl_InitObjHashTable -- |
---|
3273 | * |
---|
3274 | * Given storage for a hash table, set up the fields to prepare the hash |
---|
3275 | * table for use, the keys are Tcl_Obj *. |
---|
3276 | * |
---|
3277 | * Results: |
---|
3278 | * None. |
---|
3279 | * |
---|
3280 | * Side effects: |
---|
3281 | * TablePtr is now ready to be passed to Tcl_FindHashEntry and |
---|
3282 | * Tcl_CreateHashEntry. |
---|
3283 | * |
---|
3284 | *---------------------------------------------------------------------- |
---|
3285 | */ |
---|
3286 | |
---|
3287 | void |
---|
3288 | Tcl_InitObjHashTable( |
---|
3289 | register Tcl_HashTable *tablePtr) |
---|
3290 | /* Pointer to table record, which is supplied |
---|
3291 | * by the caller. */ |
---|
3292 | { |
---|
3293 | Tcl_InitCustomHashTable(tablePtr, TCL_CUSTOM_PTR_KEYS, |
---|
3294 | &tclObjHashKeyType); |
---|
3295 | } |
---|
3296 | |
---|
3297 | /* |
---|
3298 | *---------------------------------------------------------------------- |
---|
3299 | * |
---|
3300 | * AllocObjEntry -- |
---|
3301 | * |
---|
3302 | * Allocate space for a Tcl_HashEntry containing the Tcl_Obj * key. |
---|
3303 | * |
---|
3304 | * Results: |
---|
3305 | * The return value is a pointer to the created entry. |
---|
3306 | * |
---|
3307 | * Side effects: |
---|
3308 | * Increments the reference count on the object. |
---|
3309 | * |
---|
3310 | *---------------------------------------------------------------------- |
---|
3311 | */ |
---|
3312 | |
---|
3313 | static Tcl_HashEntry * |
---|
3314 | AllocObjEntry( |
---|
3315 | Tcl_HashTable *tablePtr, /* Hash table. */ |
---|
3316 | void *keyPtr) /* Key to store in the hash table entry. */ |
---|
3317 | { |
---|
3318 | Tcl_Obj *objPtr = (Tcl_Obj *) keyPtr; |
---|
3319 | Tcl_HashEntry *hPtr; |
---|
3320 | |
---|
3321 | hPtr = (Tcl_HashEntry *) ckalloc((unsigned) (sizeof(Tcl_HashEntry))); |
---|
3322 | hPtr->key.oneWordValue = (char *) objPtr; |
---|
3323 | Tcl_IncrRefCount(objPtr); |
---|
3324 | hPtr->clientData = NULL; |
---|
3325 | |
---|
3326 | return hPtr; |
---|
3327 | } |
---|
3328 | |
---|
3329 | /* |
---|
3330 | *---------------------------------------------------------------------- |
---|
3331 | * |
---|
3332 | * TclCompareObjKeys -- |
---|
3333 | * |
---|
3334 | * Compares two Tcl_Obj * keys. |
---|
3335 | * |
---|
3336 | * Results: |
---|
3337 | * The return value is 0 if they are different and 1 if they are the |
---|
3338 | * same. |
---|
3339 | * |
---|
3340 | * Side effects: |
---|
3341 | * None. |
---|
3342 | * |
---|
3343 | *---------------------------------------------------------------------- |
---|
3344 | */ |
---|
3345 | |
---|
3346 | int |
---|
3347 | TclCompareObjKeys( |
---|
3348 | void *keyPtr, /* New key to compare. */ |
---|
3349 | Tcl_HashEntry *hPtr) /* Existing key to compare. */ |
---|
3350 | { |
---|
3351 | Tcl_Obj *objPtr1 = (Tcl_Obj *) keyPtr; |
---|
3352 | Tcl_Obj *objPtr2 = (Tcl_Obj *) hPtr->key.oneWordValue; |
---|
3353 | register CONST char *p1, *p2; |
---|
3354 | register int l1, l2; |
---|
3355 | |
---|
3356 | /* |
---|
3357 | * If the object pointers are the same then they match. |
---|
3358 | */ |
---|
3359 | |
---|
3360 | if (objPtr1 == objPtr2) { |
---|
3361 | return 1; |
---|
3362 | } |
---|
3363 | |
---|
3364 | /* |
---|
3365 | * Don't use Tcl_GetStringFromObj as it would prevent l1 and l2 being |
---|
3366 | * in a register. |
---|
3367 | */ |
---|
3368 | |
---|
3369 | p1 = TclGetString(objPtr1); |
---|
3370 | l1 = objPtr1->length; |
---|
3371 | p2 = TclGetString(objPtr2); |
---|
3372 | l2 = objPtr2->length; |
---|
3373 | |
---|
3374 | /* |
---|
3375 | * Only compare if the string representations are of the same length. |
---|
3376 | */ |
---|
3377 | |
---|
3378 | if (l1 == l2) { |
---|
3379 | for (;; p1++, p2++, l1--) { |
---|
3380 | if (*p1 != *p2) { |
---|
3381 | break; |
---|
3382 | } |
---|
3383 | if (l1 == 0) { |
---|
3384 | return 1; |
---|
3385 | } |
---|
3386 | } |
---|
3387 | } |
---|
3388 | |
---|
3389 | return 0; |
---|
3390 | } |
---|
3391 | |
---|
3392 | /* |
---|
3393 | *---------------------------------------------------------------------- |
---|
3394 | * |
---|
3395 | * TclFreeObjEntry -- |
---|
3396 | * |
---|
3397 | * Frees space for a Tcl_HashEntry containing the Tcl_Obj * key. |
---|
3398 | * |
---|
3399 | * Results: |
---|
3400 | * The return value is a pointer to the created entry. |
---|
3401 | * |
---|
3402 | * Side effects: |
---|
3403 | * Decrements the reference count of the object. |
---|
3404 | * |
---|
3405 | *---------------------------------------------------------------------- |
---|
3406 | */ |
---|
3407 | |
---|
3408 | void |
---|
3409 | TclFreeObjEntry( |
---|
3410 | Tcl_HashEntry *hPtr) /* Hash entry to free. */ |
---|
3411 | { |
---|
3412 | Tcl_Obj *objPtr = (Tcl_Obj *) hPtr->key.oneWordValue; |
---|
3413 | |
---|
3414 | Tcl_DecrRefCount(objPtr); |
---|
3415 | ckfree((char *) hPtr); |
---|
3416 | } |
---|
3417 | |
---|
3418 | /* |
---|
3419 | *---------------------------------------------------------------------- |
---|
3420 | * |
---|
3421 | * TclHashObjKey -- |
---|
3422 | * |
---|
3423 | * Compute a one-word summary of the string representation of the |
---|
3424 | * Tcl_Obj, which can be used to generate a hash index. |
---|
3425 | * |
---|
3426 | * Results: |
---|
3427 | * The return value is a one-word summary of the information in the |
---|
3428 | * string representation of the Tcl_Obj. |
---|
3429 | * |
---|
3430 | * Side effects: |
---|
3431 | * None. |
---|
3432 | * |
---|
3433 | *---------------------------------------------------------------------- |
---|
3434 | */ |
---|
3435 | |
---|
3436 | unsigned int |
---|
3437 | TclHashObjKey( |
---|
3438 | Tcl_HashTable *tablePtr, /* Hash table. */ |
---|
3439 | void *keyPtr) /* Key from which to compute hash value. */ |
---|
3440 | { |
---|
3441 | Tcl_Obj *objPtr = (Tcl_Obj *) keyPtr; |
---|
3442 | CONST char *string = TclGetString(objPtr); |
---|
3443 | int length = objPtr->length; |
---|
3444 | unsigned int result = 0; |
---|
3445 | int i; |
---|
3446 | |
---|
3447 | /* |
---|
3448 | * I tried a zillion different hash functions and asked many other people |
---|
3449 | * for advice. Many people had their own favorite functions, all |
---|
3450 | * different, but no-one had much idea why they were good ones. I chose |
---|
3451 | * the one below (multiply by 9 and add new character) because of the |
---|
3452 | * following reasons: |
---|
3453 | * |
---|
3454 | * 1. Multiplying by 10 is perfect for keys that are decimal strings, and |
---|
3455 | * multiplying by 9 is just about as good. |
---|
3456 | * 2. Times-9 is (shift-left-3) plus (old). This means that each |
---|
3457 | * character's bits hang around in the low-order bits of the hash value |
---|
3458 | * for ever, plus they spread fairly rapidly up to the high-order bits |
---|
3459 | * to fill out the hash value. This seems works well both for decimal |
---|
3460 | * and *non-decimal strings. |
---|
3461 | */ |
---|
3462 | |
---|
3463 | for (i=0 ; i<length ; i++) { |
---|
3464 | result += (result << 3) + string[i]; |
---|
3465 | } |
---|
3466 | return result; |
---|
3467 | } |
---|
3468 | |
---|
3469 | /* |
---|
3470 | *---------------------------------------------------------------------- |
---|
3471 | * |
---|
3472 | * Tcl_GetCommandFromObj -- |
---|
3473 | * |
---|
3474 | * Returns the command specified by the name in a Tcl_Obj. |
---|
3475 | * |
---|
3476 | * Results: |
---|
3477 | * Returns a token for the command if it is found. Otherwise, if it can't |
---|
3478 | * be found or there is an error, returns NULL. |
---|
3479 | * |
---|
3480 | * Side effects: |
---|
3481 | * May update the internal representation for the object, caching the |
---|
3482 | * command reference so that the next time this function is called with |
---|
3483 | * the same object, the command can be found quickly. |
---|
3484 | * |
---|
3485 | *---------------------------------------------------------------------- |
---|
3486 | */ |
---|
3487 | |
---|
3488 | Tcl_Command |
---|
3489 | Tcl_GetCommandFromObj( |
---|
3490 | Tcl_Interp *interp, /* The interpreter in which to resolve the |
---|
3491 | * command and to report errors. */ |
---|
3492 | register Tcl_Obj *objPtr) /* The object containing the command's name. |
---|
3493 | * If the name starts with "::", will be |
---|
3494 | * looked up in global namespace. Else, looked |
---|
3495 | * up first in the current namespace, then in |
---|
3496 | * global namespace. */ |
---|
3497 | { |
---|
3498 | register ResolvedCmdName *resPtr; |
---|
3499 | register Command *cmdPtr; |
---|
3500 | Namespace *refNsPtr; |
---|
3501 | int result; |
---|
3502 | |
---|
3503 | /* |
---|
3504 | * Get the internal representation, converting to a command type if |
---|
3505 | * needed. The internal representation is a ResolvedCmdName that points to |
---|
3506 | * the actual command. |
---|
3507 | * |
---|
3508 | * Check the context namespace and the namespace epoch of the resolved |
---|
3509 | * symbol to make sure that it is fresh. Note that we verify that the |
---|
3510 | * namespace id of the context namespace is the same as the one we cached; |
---|
3511 | * this insures that the namespace wasn't deleted and a new one created at |
---|
3512 | * the same address with the same command epoch. Note that fully qualified |
---|
3513 | * names have a NULL refNsPtr, these checks needn't be made. |
---|
3514 | * |
---|
3515 | * Check also that the command's epoch is up to date, and that the command |
---|
3516 | * is not deleted. |
---|
3517 | * |
---|
3518 | * If any check fails, then force another conversion to the command type, |
---|
3519 | * to discard the old rep and create a new one. |
---|
3520 | */ |
---|
3521 | |
---|
3522 | resPtr = (ResolvedCmdName *) objPtr->internalRep.twoPtrValue.ptr1; |
---|
3523 | if ((objPtr->typePtr != &tclCmdNameType) |
---|
3524 | || (resPtr == NULL) |
---|
3525 | || (cmdPtr = resPtr->cmdPtr, cmdPtr->cmdEpoch != resPtr->cmdEpoch) |
---|
3526 | || (interp != cmdPtr->nsPtr->interp) |
---|
3527 | || (cmdPtr->flags & CMD_IS_DELETED) |
---|
3528 | || ((resPtr->refNsPtr != NULL) && |
---|
3529 | (((refNsPtr = (Namespace *) TclGetCurrentNamespace(interp)) |
---|
3530 | != resPtr->refNsPtr) |
---|
3531 | || (resPtr->refNsId != refNsPtr->nsId) |
---|
3532 | || (resPtr->refNsCmdEpoch != refNsPtr->cmdRefEpoch))) |
---|
3533 | ) { |
---|
3534 | |
---|
3535 | result = tclCmdNameType.setFromAnyProc(interp, objPtr); |
---|
3536 | |
---|
3537 | resPtr = (ResolvedCmdName *) objPtr->internalRep.twoPtrValue.ptr1; |
---|
3538 | if ((result == TCL_OK) && resPtr) { |
---|
3539 | cmdPtr = resPtr->cmdPtr; |
---|
3540 | } else { |
---|
3541 | cmdPtr = NULL; |
---|
3542 | } |
---|
3543 | } |
---|
3544 | |
---|
3545 | return (Tcl_Command) cmdPtr; |
---|
3546 | } |
---|
3547 | |
---|
3548 | /* |
---|
3549 | *---------------------------------------------------------------------- |
---|
3550 | * |
---|
3551 | * TclSetCmdNameObj -- |
---|
3552 | * |
---|
3553 | * Modify an object to be an CmdName object that refers to the argument |
---|
3554 | * Command structure. |
---|
3555 | * |
---|
3556 | * Results: |
---|
3557 | * None. |
---|
3558 | * |
---|
3559 | * Side effects: |
---|
3560 | * The object's old internal rep is freed. It's string rep is not |
---|
3561 | * changed. The refcount in the Command structure is incremented to keep |
---|
3562 | * it from being freed if the command is later deleted until |
---|
3563 | * TclExecuteByteCode has a chance to recognize that it was deleted. |
---|
3564 | * |
---|
3565 | *---------------------------------------------------------------------- |
---|
3566 | */ |
---|
3567 | |
---|
3568 | void |
---|
3569 | TclSetCmdNameObj( |
---|
3570 | Tcl_Interp *interp, /* Points to interpreter containing command |
---|
3571 | * that should be cached in objPtr. */ |
---|
3572 | register Tcl_Obj *objPtr, /* Points to Tcl object to be changed to a |
---|
3573 | * CmdName object. */ |
---|
3574 | Command *cmdPtr) /* Points to Command structure that the |
---|
3575 | * CmdName object should refer to. */ |
---|
3576 | { |
---|
3577 | Interp *iPtr = (Interp *) interp; |
---|
3578 | register ResolvedCmdName *resPtr; |
---|
3579 | register Namespace *currNsPtr; |
---|
3580 | char *name; |
---|
3581 | |
---|
3582 | if (objPtr->typePtr == &tclCmdNameType) { |
---|
3583 | return; |
---|
3584 | } |
---|
3585 | |
---|
3586 | cmdPtr->refCount++; |
---|
3587 | resPtr = (ResolvedCmdName *) ckalloc(sizeof(ResolvedCmdName)); |
---|
3588 | resPtr->cmdPtr = cmdPtr; |
---|
3589 | resPtr->cmdEpoch = cmdPtr->cmdEpoch; |
---|
3590 | resPtr->refCount = 1; |
---|
3591 | |
---|
3592 | name = TclGetString(objPtr); |
---|
3593 | if ((*name++ == ':') && (*name == ':')) { |
---|
3594 | /* |
---|
3595 | * The name is fully qualified: set the referring namespace to |
---|
3596 | * NULL. |
---|
3597 | */ |
---|
3598 | |
---|
3599 | resPtr->refNsPtr = NULL; |
---|
3600 | } else { |
---|
3601 | /* |
---|
3602 | * Get the current namespace. |
---|
3603 | */ |
---|
3604 | |
---|
3605 | currNsPtr = iPtr->varFramePtr->nsPtr; |
---|
3606 | |
---|
3607 | resPtr->refNsPtr = currNsPtr; |
---|
3608 | resPtr->refNsId = currNsPtr->nsId; |
---|
3609 | resPtr->refNsCmdEpoch = currNsPtr->cmdRefEpoch; |
---|
3610 | } |
---|
3611 | |
---|
3612 | TclFreeIntRep(objPtr); |
---|
3613 | objPtr->internalRep.twoPtrValue.ptr1 = (void *) resPtr; |
---|
3614 | objPtr->internalRep.twoPtrValue.ptr2 = NULL; |
---|
3615 | objPtr->typePtr = &tclCmdNameType; |
---|
3616 | } |
---|
3617 | |
---|
3618 | /* |
---|
3619 | *---------------------------------------------------------------------- |
---|
3620 | * |
---|
3621 | * FreeCmdNameInternalRep -- |
---|
3622 | * |
---|
3623 | * Frees the resources associated with a cmdName object's internal |
---|
3624 | * representation. |
---|
3625 | * |
---|
3626 | * Results: |
---|
3627 | * None. |
---|
3628 | * |
---|
3629 | * Side effects: |
---|
3630 | * Decrements the ref count of any cached ResolvedCmdName structure |
---|
3631 | * pointed to by the cmdName's internal representation. If this is the |
---|
3632 | * last use of the ResolvedCmdName, it is freed. This in turn decrements |
---|
3633 | * the ref count of the Command structure pointed to by the |
---|
3634 | * ResolvedSymbol, which may free the Command structure. |
---|
3635 | * |
---|
3636 | *---------------------------------------------------------------------- |
---|
3637 | */ |
---|
3638 | |
---|
3639 | static void |
---|
3640 | FreeCmdNameInternalRep( |
---|
3641 | register Tcl_Obj *objPtr) /* CmdName object with internal |
---|
3642 | * representation to free. */ |
---|
3643 | { |
---|
3644 | register ResolvedCmdName *resPtr = |
---|
3645 | (ResolvedCmdName *) objPtr->internalRep.twoPtrValue.ptr1; |
---|
3646 | |
---|
3647 | if (resPtr != NULL) { |
---|
3648 | /* |
---|
3649 | * Decrement the reference count of the ResolvedCmdName structure. If |
---|
3650 | * there are no more uses, free the ResolvedCmdName structure. |
---|
3651 | */ |
---|
3652 | |
---|
3653 | resPtr->refCount--; |
---|
3654 | if (resPtr->refCount == 0) { |
---|
3655 | /* |
---|
3656 | * Now free the cached command, unless it is still in its hash |
---|
3657 | * table or if there are other references to it from other cmdName |
---|
3658 | * objects. |
---|
3659 | */ |
---|
3660 | |
---|
3661 | Command *cmdPtr = resPtr->cmdPtr; |
---|
3662 | TclCleanupCommandMacro(cmdPtr); |
---|
3663 | ckfree((char *) resPtr); |
---|
3664 | } |
---|
3665 | } |
---|
3666 | } |
---|
3667 | |
---|
3668 | /* |
---|
3669 | *---------------------------------------------------------------------- |
---|
3670 | * |
---|
3671 | * DupCmdNameInternalRep -- |
---|
3672 | * |
---|
3673 | * Initialize the internal representation of an cmdName Tcl_Obj to a copy |
---|
3674 | * of the internal representation of an existing cmdName object. |
---|
3675 | * |
---|
3676 | * Results: |
---|
3677 | * None. |
---|
3678 | * |
---|
3679 | * Side effects: |
---|
3680 | * "copyPtr"s internal rep is set to point to the ResolvedCmdName |
---|
3681 | * structure corresponding to "srcPtr"s internal rep. Increments the ref |
---|
3682 | * count of the ResolvedCmdName structure pointed to by the cmdName's |
---|
3683 | * internal representation. |
---|
3684 | * |
---|
3685 | *---------------------------------------------------------------------- |
---|
3686 | */ |
---|
3687 | |
---|
3688 | static void |
---|
3689 | DupCmdNameInternalRep( |
---|
3690 | Tcl_Obj *srcPtr, /* Object with internal rep to copy. */ |
---|
3691 | register Tcl_Obj *copyPtr) /* Object with internal rep to set. */ |
---|
3692 | { |
---|
3693 | register ResolvedCmdName *resPtr = (ResolvedCmdName *) |
---|
3694 | srcPtr->internalRep.twoPtrValue.ptr1; |
---|
3695 | |
---|
3696 | copyPtr->internalRep.twoPtrValue.ptr1 = (void *) resPtr; |
---|
3697 | copyPtr->internalRep.twoPtrValue.ptr2 = NULL; |
---|
3698 | if (resPtr != NULL) { |
---|
3699 | resPtr->refCount++; |
---|
3700 | } |
---|
3701 | copyPtr->typePtr = &tclCmdNameType; |
---|
3702 | } |
---|
3703 | |
---|
3704 | /* |
---|
3705 | *---------------------------------------------------------------------- |
---|
3706 | * |
---|
3707 | * SetCmdNameFromAny -- |
---|
3708 | * |
---|
3709 | * Generate an cmdName internal form for the Tcl object "objPtr". |
---|
3710 | * |
---|
3711 | * Results: |
---|
3712 | * The return value is a standard Tcl result. The conversion always |
---|
3713 | * succeeds and TCL_OK is returned. |
---|
3714 | * |
---|
3715 | * Side effects: |
---|
3716 | * A pointer to a ResolvedCmdName structure that holds a cached pointer |
---|
3717 | * to the command with a name that matches objPtr's string rep is stored |
---|
3718 | * as objPtr's internal representation. This ResolvedCmdName pointer will |
---|
3719 | * be NULL if no matching command was found. The ref count of the cached |
---|
3720 | * Command's structure (if any) is also incremented. |
---|
3721 | * |
---|
3722 | *---------------------------------------------------------------------- |
---|
3723 | */ |
---|
3724 | |
---|
3725 | static int |
---|
3726 | SetCmdNameFromAny( |
---|
3727 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
3728 | register Tcl_Obj *objPtr) /* The object to convert. */ |
---|
3729 | { |
---|
3730 | Interp *iPtr = (Interp *) interp; |
---|
3731 | char *name; |
---|
3732 | register Command *cmdPtr; |
---|
3733 | Namespace *currNsPtr; |
---|
3734 | register ResolvedCmdName *resPtr; |
---|
3735 | |
---|
3736 | /* |
---|
3737 | * Find the Command structure, if any, that describes the command called |
---|
3738 | * "name". Build a ResolvedCmdName that holds a cached pointer to this |
---|
3739 | * Command, and bump the reference count in the referenced Command |
---|
3740 | * structure. A Command structure will not be deleted as long as it is |
---|
3741 | * referenced from a CmdName object. |
---|
3742 | */ |
---|
3743 | |
---|
3744 | name = TclGetString(objPtr); |
---|
3745 | cmdPtr = (Command *) Tcl_FindCommand(interp, name, /*ns*/ NULL, /*flags*/ 0); |
---|
3746 | |
---|
3747 | /* |
---|
3748 | * Free the old internalRep before setting the new one. Do this after |
---|
3749 | * getting the string rep to allow the conversion code (in particular, |
---|
3750 | * Tcl_GetStringFromObj) to use that old internalRep. |
---|
3751 | */ |
---|
3752 | |
---|
3753 | if (cmdPtr) { |
---|
3754 | cmdPtr->refCount++; |
---|
3755 | resPtr = (ResolvedCmdName *) objPtr->internalRep.otherValuePtr; |
---|
3756 | if ((objPtr->typePtr == &tclCmdNameType) |
---|
3757 | && resPtr && (resPtr->refCount == 1)) { |
---|
3758 | /* |
---|
3759 | * Reuse the old ResolvedCmdName struct instead of freeing it |
---|
3760 | */ |
---|
3761 | |
---|
3762 | Command *oldCmdPtr = resPtr->cmdPtr; |
---|
3763 | if (--oldCmdPtr->refCount == 0) { |
---|
3764 | TclCleanupCommandMacro(oldCmdPtr); |
---|
3765 | } |
---|
3766 | } else { |
---|
3767 | TclFreeIntRep(objPtr); |
---|
3768 | resPtr = (ResolvedCmdName *) ckalloc(sizeof(ResolvedCmdName)); |
---|
3769 | resPtr->refCount = 1; |
---|
3770 | objPtr->internalRep.twoPtrValue.ptr1 = (void *) resPtr; |
---|
3771 | objPtr->internalRep.twoPtrValue.ptr2 = NULL; |
---|
3772 | objPtr->typePtr = &tclCmdNameType; |
---|
3773 | } |
---|
3774 | resPtr->cmdPtr = cmdPtr; |
---|
3775 | resPtr->cmdEpoch = cmdPtr->cmdEpoch; |
---|
3776 | if ((*name++ == ':') && (*name == ':')) { |
---|
3777 | /* |
---|
3778 | * The name is fully qualified: set the referring namespace to |
---|
3779 | * NULL. |
---|
3780 | */ |
---|
3781 | |
---|
3782 | resPtr->refNsPtr = NULL; |
---|
3783 | } else { |
---|
3784 | /* |
---|
3785 | * Get the current namespace. |
---|
3786 | */ |
---|
3787 | |
---|
3788 | currNsPtr = iPtr->varFramePtr->nsPtr; |
---|
3789 | |
---|
3790 | resPtr->refNsPtr = currNsPtr; |
---|
3791 | resPtr->refNsId = currNsPtr->nsId; |
---|
3792 | resPtr->refNsCmdEpoch = currNsPtr->cmdRefEpoch; |
---|
3793 | } |
---|
3794 | } else { |
---|
3795 | TclFreeIntRep(objPtr); |
---|
3796 | objPtr->internalRep.twoPtrValue.ptr1 = NULL; |
---|
3797 | objPtr->internalRep.twoPtrValue.ptr2 = NULL; |
---|
3798 | objPtr->typePtr = &tclCmdNameType; |
---|
3799 | } |
---|
3800 | return TCL_OK; |
---|
3801 | } |
---|
3802 | |
---|
3803 | /* |
---|
3804 | * Local Variables: |
---|
3805 | * mode: c |
---|
3806 | * c-basic-offset: 4 |
---|
3807 | * fill-column: 78 |
---|
3808 | * End: |
---|
3809 | */ |
---|