[25] | 1 | /* |
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| 2 | * tclStringObj.c -- |
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| 3 | * |
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| 4 | * This file contains functions that implement string operations on Tcl |
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| 5 | * objects. Some string operations work with UTF strings and others |
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| 6 | * require Unicode format. Functions that require knowledge of the width |
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| 7 | * of each character, such as indexing, operate on Unicode data. |
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| 8 | * |
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| 9 | * A Unicode string is an internationalized string. Conceptually, a |
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| 10 | * Unicode string is an array of 16-bit quantities organized as a |
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| 11 | * sequence of properly formed UTF-8 characters. There is a one-to-one |
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| 12 | * map between Unicode and UTF characters. Because Unicode characters |
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| 13 | * have a fixed width, operations such as indexing operate on Unicode |
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| 14 | * data. The String object is optimized for the case where each UTF char |
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| 15 | * in a string is only one byte. In this case, we store the value of |
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| 16 | * numChars, but we don't store the Unicode data (unless Tcl_GetUnicode |
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| 17 | * is explicitly called). |
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| 18 | * |
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| 19 | * The String object type stores one or both formats. The default |
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| 20 | * behavior is to store UTF. Once Unicode is calculated by a function, it |
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| 21 | * is stored in the internal rep for future access (without an additional |
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| 22 | * O(n) cost). |
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| 23 | * |
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| 24 | * To allow many appends to be done to an object without constantly |
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| 25 | * reallocating the space for the string or Unicode representation, we |
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| 26 | * allocate double the space for the string or Unicode and use the |
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| 27 | * internal representation to keep track of how much space is used vs. |
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| 28 | * allocated. |
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| 29 | * |
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| 30 | * Copyright (c) 1995-1997 Sun Microsystems, Inc. |
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| 31 | * Copyright (c) 1999 by Scriptics Corporation. |
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| 32 | * |
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| 33 | * See the file "license.terms" for information on usage and redistribution of |
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| 34 | * this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 35 | * |
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| 36 | * RCS: @(#) $Id: tclStringObj.c,v 1.70 2008/02/28 17:36:49 dgp Exp $ */ |
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| 37 | |
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| 38 | #include "tclInt.h" |
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| 39 | #include "tommath.h" |
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| 40 | |
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| 41 | /* |
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| 42 | * Prototypes for functions defined later in this file: |
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| 43 | */ |
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| 44 | |
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| 45 | static void AppendUnicodeToUnicodeRep(Tcl_Obj *objPtr, |
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| 46 | const Tcl_UniChar *unicode, int appendNumChars); |
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| 47 | static void AppendUnicodeToUtfRep(Tcl_Obj *objPtr, |
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| 48 | const Tcl_UniChar *unicode, int numChars); |
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| 49 | static void AppendUtfToUnicodeRep(Tcl_Obj *objPtr, |
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| 50 | const char *bytes, int numBytes); |
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| 51 | static void AppendUtfToUtfRep(Tcl_Obj *objPtr, |
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| 52 | const char *bytes, int numBytes); |
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| 53 | static void FillUnicodeRep(Tcl_Obj *objPtr); |
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| 54 | static void AppendPrintfToObjVA(Tcl_Obj *objPtr, |
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| 55 | const char *format, va_list argList); |
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| 56 | static void FreeStringInternalRep(Tcl_Obj *objPtr); |
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| 57 | static void DupStringInternalRep(Tcl_Obj *objPtr, |
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| 58 | Tcl_Obj *copyPtr); |
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| 59 | static int SetStringFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); |
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| 60 | static void UpdateStringOfString(Tcl_Obj *objPtr); |
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| 61 | |
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| 62 | /* |
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| 63 | * The structure below defines the string Tcl object type by means of |
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| 64 | * functions that can be invoked by generic object code. |
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| 65 | */ |
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| 66 | |
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| 67 | Tcl_ObjType tclStringType = { |
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| 68 | "string", /* name */ |
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| 69 | FreeStringInternalRep, /* freeIntRepPro */ |
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| 70 | DupStringInternalRep, /* dupIntRepProc */ |
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| 71 | UpdateStringOfString, /* updateStringProc */ |
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| 72 | SetStringFromAny /* setFromAnyProc */ |
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| 73 | }; |
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| 74 | |
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| 75 | /* |
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| 76 | * The following structure is the internal rep for a String object. It keeps |
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| 77 | * track of how much memory has been used and how much has been allocated for |
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| 78 | * the Unicode and UTF string to enable growing and shrinking of the UTF and |
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| 79 | * Unicode reps of the String object with fewer mallocs. To optimize string |
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| 80 | * length and indexing operations, this structure also stores the number of |
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| 81 | * characters (same of UTF and Unicode!) once that value has been computed. |
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| 82 | * |
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| 83 | * Under normal configurations, what Tcl calls "Unicode" is actually UTF-16 |
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| 84 | * restricted to the Basic Multilingual Plane (i.e. U+00000 to U+0FFFF). This |
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| 85 | * can be officially modified by altering the definition of Tcl_UniChar in |
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| 86 | * tcl.h, but do not do that unless you are sure what you're doing! |
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| 87 | */ |
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| 88 | |
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| 89 | typedef struct String { |
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| 90 | int numChars; /* The number of chars in the string. -1 means |
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| 91 | * this value has not been calculated. >= 0 |
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| 92 | * means that there is a valid Unicode rep, or |
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| 93 | * that the number of UTF bytes == the number |
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| 94 | * of chars. */ |
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| 95 | size_t allocated; /* The amount of space actually allocated for |
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| 96 | * the UTF string (minus 1 byte for the |
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| 97 | * termination char). */ |
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| 98 | size_t uallocated; /* The amount of space actually allocated for |
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| 99 | * the Unicode string (minus 2 bytes for the |
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| 100 | * termination char). */ |
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| 101 | int hasUnicode; /* Boolean determining whether the string has |
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| 102 | * a Unicode representation. */ |
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| 103 | Tcl_UniChar unicode[2]; /* The array of Unicode chars. The actual size |
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| 104 | * of this field depends on the 'uallocated' |
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| 105 | * field above. */ |
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| 106 | } String; |
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| 107 | |
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| 108 | #define STRING_UALLOC(numChars) \ |
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| 109 | (numChars * sizeof(Tcl_UniChar)) |
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| 110 | #define STRING_SIZE(ualloc) \ |
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| 111 | ((unsigned) ((ualloc) \ |
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| 112 | ? sizeof(String) - sizeof(Tcl_UniChar) + (ualloc) \ |
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| 113 | : sizeof(String))) |
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| 114 | #define GET_STRING(objPtr) \ |
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| 115 | ((String *) (objPtr)->internalRep.otherValuePtr) |
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| 116 | #define SET_STRING(objPtr, stringPtr) \ |
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| 117 | ((objPtr)->internalRep.otherValuePtr = (void *) (stringPtr)) |
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| 118 | |
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| 119 | /* |
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| 120 | * TCL STRING GROWTH ALGORITHM |
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| 121 | * |
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| 122 | * When growing strings (during an append, for example), the following growth |
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| 123 | * algorithm is used: |
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| 124 | * |
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| 125 | * Attempt to allocate 2 * (originalLength + appendLength) |
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| 126 | * On failure: |
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| 127 | * attempt to allocate originalLength + 2*appendLength + |
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| 128 | * TCL_GROWTH_MIN_ALLOC |
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| 129 | * |
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| 130 | * This algorithm allows very good performance, as it rapidly increases the |
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| 131 | * memory allocated for a given string, which minimizes the number of |
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| 132 | * reallocations that must be performed. However, using only the doubling |
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| 133 | * algorithm can lead to a significant waste of memory. In particular, it may |
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| 134 | * fail even when there is sufficient memory available to complete the append |
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| 135 | * request (but there is not 2*totalLength memory available). So when the |
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| 136 | * doubling fails (because there is not enough memory available), the |
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| 137 | * algorithm requests a smaller amount of memory, which is still enough to |
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| 138 | * cover the request, but which hopefully will be less than the total |
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| 139 | * available memory. |
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| 140 | * |
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| 141 | * The addition of TCL_GROWTH_MIN_ALLOC allows for efficient handling of very |
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| 142 | * small appends. Without this extra slush factor, a sequence of several small |
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| 143 | * appends would cause several memory allocations. As long as |
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| 144 | * TCL_GROWTH_MIN_ALLOC is a reasonable size, we can avoid that behavior. |
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| 145 | * |
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| 146 | * The growth algorithm can be tuned by adjusting the following parameters: |
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| 147 | * |
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| 148 | * TCL_GROWTH_MIN_ALLOC Additional space, in bytes, to allocate when |
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| 149 | * the double allocation has failed. Default is |
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| 150 | * 1024 (1 kilobyte). |
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| 151 | */ |
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| 152 | |
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| 153 | #ifndef TCL_GROWTH_MIN_ALLOC |
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| 154 | #define TCL_GROWTH_MIN_ALLOC 1024 |
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| 155 | #endif |
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| 156 | |
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| 157 | /* |
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| 158 | *---------------------------------------------------------------------- |
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| 159 | * |
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| 160 | * Tcl_NewStringObj -- |
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| 161 | * |
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| 162 | * This function is normally called when not debugging: i.e., when |
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| 163 | * TCL_MEM_DEBUG is not defined. It creates a new string object and |
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| 164 | * initializes it from the byte pointer and length arguments. |
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| 165 | * |
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| 166 | * When TCL_MEM_DEBUG is defined, this function just returns the result |
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| 167 | * of calling the debugging version Tcl_DbNewStringObj. |
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| 168 | * |
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| 169 | * Results: |
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| 170 | * A newly created string object is returned that has ref count zero. |
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| 171 | * |
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| 172 | * Side effects: |
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| 173 | * The new object's internal string representation will be set to a copy |
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| 174 | * of the length bytes starting at "bytes". If "length" is negative, use |
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| 175 | * bytes up to the first NUL byte; i.e., assume "bytes" points to a |
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| 176 | * C-style NUL-terminated string. The object's type is set to NULL. An |
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| 177 | * extra NUL is added to the end of the new object's byte array. |
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| 178 | * |
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| 179 | *---------------------------------------------------------------------- |
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| 180 | */ |
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| 181 | |
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| 182 | #ifdef TCL_MEM_DEBUG |
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| 183 | #undef Tcl_NewStringObj |
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| 184 | Tcl_Obj * |
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| 185 | Tcl_NewStringObj( |
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| 186 | const char *bytes, /* Points to the first of the length bytes |
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| 187 | * used to initialize the new object. */ |
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| 188 | int length) /* The number of bytes to copy from "bytes" |
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| 189 | * when initializing the new object. If |
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| 190 | * negative, use bytes up to the first NUL |
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| 191 | * byte. */ |
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| 192 | { |
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| 193 | return Tcl_DbNewStringObj(bytes, length, "unknown", 0); |
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| 194 | } |
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| 195 | #else /* if not TCL_MEM_DEBUG */ |
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| 196 | Tcl_Obj * |
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| 197 | Tcl_NewStringObj( |
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| 198 | const char *bytes, /* Points to the first of the length bytes |
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| 199 | * used to initialize the new object. */ |
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| 200 | int length) /* The number of bytes to copy from "bytes" |
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| 201 | * when initializing the new object. If |
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| 202 | * negative, use bytes up to the first NUL |
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| 203 | * byte. */ |
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| 204 | { |
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| 205 | register Tcl_Obj *objPtr; |
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| 206 | |
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| 207 | if (length < 0) { |
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| 208 | length = (bytes? strlen(bytes) : 0); |
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| 209 | } |
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| 210 | TclNewStringObj(objPtr, bytes, length); |
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| 211 | return objPtr; |
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| 212 | } |
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| 213 | #endif /* TCL_MEM_DEBUG */ |
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| 214 | |
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| 215 | /* |
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| 216 | *---------------------------------------------------------------------- |
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| 217 | * |
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| 218 | * Tcl_DbNewStringObj -- |
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| 219 | * |
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| 220 | * This function is normally called when debugging: i.e., when |
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| 221 | * TCL_MEM_DEBUG is defined. It creates new string objects. It is the |
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| 222 | * same as the Tcl_NewStringObj function above except that it calls |
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| 223 | * Tcl_DbCkalloc directly with the file name and line number from its |
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| 224 | * caller. This simplifies debugging since then the [memory active] |
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| 225 | * command will report the correct file name and line number when |
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| 226 | * reporting objects that haven't been freed. |
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| 227 | * |
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| 228 | * When TCL_MEM_DEBUG is not defined, this function just returns the |
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| 229 | * result of calling Tcl_NewStringObj. |
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| 230 | * |
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| 231 | * Results: |
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| 232 | * A newly created string object is returned that has ref count zero. |
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| 233 | * |
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| 234 | * Side effects: |
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| 235 | * The new object's internal string representation will be set to a copy |
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| 236 | * of the length bytes starting at "bytes". If "length" is negative, use |
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| 237 | * bytes up to the first NUL byte; i.e., assume "bytes" points to a |
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| 238 | * C-style NUL-terminated string. The object's type is set to NULL. An |
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| 239 | * extra NUL is added to the end of the new object's byte array. |
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| 240 | * |
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| 241 | *---------------------------------------------------------------------- |
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| 242 | */ |
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| 243 | |
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| 244 | #ifdef TCL_MEM_DEBUG |
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| 245 | Tcl_Obj * |
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| 246 | Tcl_DbNewStringObj( |
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| 247 | const char *bytes, /* Points to the first of the length bytes |
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| 248 | * used to initialize the new object. */ |
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| 249 | int length, /* The number of bytes to copy from "bytes" |
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| 250 | * when initializing the new object. If |
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| 251 | * negative, use bytes up to the first NUL |
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| 252 | * byte. */ |
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| 253 | const char *file, /* The name of the source file calling this |
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| 254 | * function; used for debugging. */ |
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| 255 | int line) /* Line number in the source file; used for |
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| 256 | * debugging. */ |
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| 257 | { |
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| 258 | register Tcl_Obj *objPtr; |
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| 259 | |
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| 260 | if (length < 0) { |
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| 261 | length = (bytes? strlen(bytes) : 0); |
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| 262 | } |
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| 263 | TclDbNewObj(objPtr, file, line); |
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| 264 | TclInitStringRep(objPtr, bytes, length); |
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| 265 | return objPtr; |
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| 266 | } |
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| 267 | #else /* if not TCL_MEM_DEBUG */ |
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| 268 | Tcl_Obj * |
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| 269 | Tcl_DbNewStringObj( |
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| 270 | const char *bytes, /* Points to the first of the length bytes |
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| 271 | * used to initialize the new object. */ |
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| 272 | register int length, /* The number of bytes to copy from "bytes" |
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| 273 | * when initializing the new object. If |
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| 274 | * negative, use bytes up to the first NUL |
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| 275 | * byte. */ |
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| 276 | const char *file, /* The name of the source file calling this |
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| 277 | * function; used for debugging. */ |
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| 278 | int line) /* Line number in the source file; used for |
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| 279 | * debugging. */ |
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| 280 | { |
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| 281 | return Tcl_NewStringObj(bytes, length); |
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| 282 | } |
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| 283 | #endif /* TCL_MEM_DEBUG */ |
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| 284 | |
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| 285 | /* |
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| 286 | *--------------------------------------------------------------------------- |
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| 287 | * |
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| 288 | * Tcl_NewUnicodeObj -- |
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| 289 | * |
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| 290 | * This function is creates a new String object and initializes it from |
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| 291 | * the given Unicode String. If the Utf String is the same size as the |
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| 292 | * Unicode string, don't duplicate the data. |
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| 293 | * |
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| 294 | * Results: |
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| 295 | * The newly created object is returned. This object will have no initial |
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| 296 | * string representation. The returned object has a ref count of 0. |
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| 297 | * |
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| 298 | * Side effects: |
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| 299 | * Memory allocated for new object and copy of Unicode argument. |
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| 300 | * |
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| 301 | *--------------------------------------------------------------------------- |
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| 302 | */ |
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| 303 | |
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| 304 | Tcl_Obj * |
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| 305 | Tcl_NewUnicodeObj( |
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| 306 | const Tcl_UniChar *unicode, /* The unicode string used to initialize the |
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| 307 | * new object. */ |
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| 308 | int numChars) /* Number of characters in the unicode |
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| 309 | * string. */ |
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| 310 | { |
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| 311 | Tcl_Obj *objPtr; |
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| 312 | String *stringPtr; |
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| 313 | size_t uallocated; |
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| 314 | |
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| 315 | if (numChars < 0) { |
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| 316 | numChars = 0; |
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| 317 | if (unicode) { |
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| 318 | while (unicode[numChars] != 0) { |
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| 319 | numChars++; |
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| 320 | } |
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| 321 | } |
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| 322 | } |
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| 323 | uallocated = STRING_UALLOC(numChars); |
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| 324 | |
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| 325 | /* |
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| 326 | * Create a new obj with an invalid string rep. |
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| 327 | */ |
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| 328 | |
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| 329 | TclNewObj(objPtr); |
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| 330 | Tcl_InvalidateStringRep(objPtr); |
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| 331 | objPtr->typePtr = &tclStringType; |
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| 332 | |
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| 333 | stringPtr = (String *) ckalloc(STRING_SIZE(uallocated)); |
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| 334 | stringPtr->numChars = numChars; |
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| 335 | stringPtr->uallocated = uallocated; |
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| 336 | stringPtr->hasUnicode = (numChars > 0); |
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| 337 | stringPtr->allocated = 0; |
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| 338 | memcpy(stringPtr->unicode, unicode, uallocated); |
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| 339 | stringPtr->unicode[numChars] = 0; |
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| 340 | SET_STRING(objPtr, stringPtr); |
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| 341 | return objPtr; |
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| 342 | } |
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| 343 | |
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| 344 | /* |
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| 345 | *---------------------------------------------------------------------- |
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| 346 | * |
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| 347 | * Tcl_GetCharLength -- |
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| 348 | * |
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| 349 | * Get the length of the Unicode string from the Tcl object. |
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| 350 | * |
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| 351 | * Results: |
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| 352 | * Pointer to unicode string representing the unicode object. |
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| 353 | * |
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| 354 | * Side effects: |
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| 355 | * Frees old internal rep. Allocates memory for new "String" internal |
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| 356 | * rep. |
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| 357 | * |
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| 358 | *---------------------------------------------------------------------- |
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| 359 | */ |
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| 360 | |
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| 361 | int |
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| 362 | Tcl_GetCharLength( |
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| 363 | Tcl_Obj *objPtr) /* The String object to get the num chars |
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| 364 | * of. */ |
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| 365 | { |
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| 366 | String *stringPtr; |
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| 367 | |
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| 368 | SetStringFromAny(NULL, objPtr); |
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| 369 | stringPtr = GET_STRING(objPtr); |
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| 370 | |
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| 371 | /* |
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| 372 | * If numChars is unknown, then calculate the number of characaters while |
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| 373 | * populating the Unicode string. |
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| 374 | */ |
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| 375 | |
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| 376 | if (stringPtr->numChars == -1) { |
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| 377 | register int i = objPtr->length; |
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| 378 | register unsigned char *str = (unsigned char *) objPtr->bytes; |
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| 379 | |
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| 380 | /* |
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| 381 | * This is a speed sensitive function, so run specially over the |
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| 382 | * string to count continuous ascii characters before resorting to the |
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| 383 | * Tcl_NumUtfChars call. This is a long form of: |
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| 384 | stringPtr->numChars = Tcl_NumUtfChars(objPtr->bytes,objPtr->length); |
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| 385 | * |
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| 386 | * TODO: Consider macro-izing this. |
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| 387 | */ |
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| 388 | |
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| 389 | while (i && (*str < 0xC0)) { |
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| 390 | i--; |
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| 391 | str++; |
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| 392 | } |
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| 393 | stringPtr->numChars = objPtr->length - i; |
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| 394 | if (i) { |
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| 395 | stringPtr->numChars += Tcl_NumUtfChars(objPtr->bytes |
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| 396 | + (objPtr->length - i), i); |
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| 397 | } |
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| 398 | |
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| 399 | if (stringPtr->numChars == objPtr->length) { |
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| 400 | /* |
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| 401 | * Since we've just calculated the number of chars, and all UTF |
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| 402 | * chars are 1-byte long, we don't need to store the unicode |
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| 403 | * string. |
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| 404 | */ |
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| 405 | |
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| 406 | stringPtr->hasUnicode = 0; |
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| 407 | } else { |
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| 408 | /* |
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| 409 | * Since we've just calucalated the number of chars, and not all |
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| 410 | * UTF chars are 1-byte long, go ahead and populate the unicode |
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| 411 | * string. |
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| 412 | */ |
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| 413 | |
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| 414 | FillUnicodeRep(objPtr); |
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| 415 | |
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| 416 | /* |
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| 417 | * We need to fetch the pointer again because we have just |
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| 418 | * reallocated the structure to make room for the Unicode data. |
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| 419 | */ |
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| 420 | |
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| 421 | stringPtr = GET_STRING(objPtr); |
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| 422 | } |
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| 423 | } |
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| 424 | return stringPtr->numChars; |
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| 425 | } |
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| 426 | |
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| 427 | /* |
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| 428 | *---------------------------------------------------------------------- |
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| 429 | * |
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| 430 | * Tcl_GetUniChar -- |
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| 431 | * |
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| 432 | * Get the index'th Unicode character from the String object. The index |
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| 433 | * is assumed to be in the appropriate range. |
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| 434 | * |
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| 435 | * Results: |
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| 436 | * Returns the index'th Unicode character in the Object. |
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| 437 | * |
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| 438 | * Side effects: |
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| 439 | * Fills unichar with the index'th Unicode character. |
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| 440 | * |
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| 441 | *---------------------------------------------------------------------- |
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| 442 | */ |
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| 443 | |
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| 444 | Tcl_UniChar |
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| 445 | Tcl_GetUniChar( |
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| 446 | Tcl_Obj *objPtr, /* The object to get the Unicode charater |
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| 447 | * from. */ |
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| 448 | int index) /* Get the index'th Unicode character. */ |
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| 449 | { |
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| 450 | Tcl_UniChar unichar; |
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| 451 | String *stringPtr; |
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| 452 | |
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| 453 | SetStringFromAny(NULL, objPtr); |
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| 454 | stringPtr = GET_STRING(objPtr); |
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| 455 | |
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| 456 | if (stringPtr->numChars == -1) { |
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| 457 | /* |
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| 458 | * We haven't yet calculated the length, so we don't have the Unicode |
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| 459 | * str. We need to know the number of chars before we can do indexing. |
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| 460 | */ |
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| 461 | |
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| 462 | Tcl_GetCharLength(objPtr); |
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| 463 | |
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| 464 | /* |
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| 465 | * We need to fetch the pointer again because we may have just |
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| 466 | * reallocated the structure. |
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| 467 | */ |
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| 468 | |
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| 469 | stringPtr = GET_STRING(objPtr); |
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| 470 | } |
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| 471 | if (stringPtr->hasUnicode == 0) { |
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| 472 | /* |
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| 473 | * All of the characters in the Utf string are 1 byte chars, so we |
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| 474 | * don't store the unicode char. We get the Utf string and convert the |
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| 475 | * index'th byte to a Unicode character. |
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| 476 | */ |
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| 477 | |
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| 478 | unichar = (Tcl_UniChar) objPtr->bytes[index]; |
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| 479 | } else { |
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| 480 | unichar = stringPtr->unicode[index]; |
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| 481 | } |
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| 482 | return unichar; |
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| 483 | } |
---|
| 484 | |
---|
| 485 | /* |
---|
| 486 | *---------------------------------------------------------------------- |
---|
| 487 | * |
---|
| 488 | * Tcl_GetUnicode -- |
---|
| 489 | * |
---|
| 490 | * Get the Unicode form of the String object. If the object is not |
---|
| 491 | * already a String object, it will be converted to one. If the String |
---|
| 492 | * object does not have a Unicode rep, then one is create from the UTF |
---|
| 493 | * string format. |
---|
| 494 | * |
---|
| 495 | * Results: |
---|
| 496 | * Returns a pointer to the object's internal Unicode string. |
---|
| 497 | * |
---|
| 498 | * Side effects: |
---|
| 499 | * Converts the object to have the String internal rep. |
---|
| 500 | * |
---|
| 501 | *---------------------------------------------------------------------- |
---|
| 502 | */ |
---|
| 503 | |
---|
| 504 | Tcl_UniChar * |
---|
| 505 | Tcl_GetUnicode( |
---|
| 506 | Tcl_Obj *objPtr) /* The object to find the unicode string |
---|
| 507 | * for. */ |
---|
| 508 | { |
---|
| 509 | String *stringPtr; |
---|
| 510 | |
---|
| 511 | SetStringFromAny(NULL, objPtr); |
---|
| 512 | stringPtr = GET_STRING(objPtr); |
---|
| 513 | |
---|
| 514 | if ((stringPtr->numChars == -1) || (stringPtr->hasUnicode == 0)) { |
---|
| 515 | /* |
---|
| 516 | * We haven't yet calculated the length, or all of the characters in |
---|
| 517 | * the Utf string are 1 byte chars (so we didn't store the unicode |
---|
| 518 | * str). Since this function must return a unicode string, and one has |
---|
| 519 | * not yet been stored, force the Unicode to be calculated and stored |
---|
| 520 | * now. |
---|
| 521 | */ |
---|
| 522 | |
---|
| 523 | FillUnicodeRep(objPtr); |
---|
| 524 | |
---|
| 525 | /* |
---|
| 526 | * We need to fetch the pointer again because we have just reallocated |
---|
| 527 | * the structure to make room for the Unicode data. |
---|
| 528 | */ |
---|
| 529 | |
---|
| 530 | stringPtr = GET_STRING(objPtr); |
---|
| 531 | } |
---|
| 532 | return stringPtr->unicode; |
---|
| 533 | } |
---|
| 534 | |
---|
| 535 | /* |
---|
| 536 | *---------------------------------------------------------------------- |
---|
| 537 | * |
---|
| 538 | * Tcl_GetUnicodeFromObj -- |
---|
| 539 | * |
---|
| 540 | * Get the Unicode form of the String object with length. If the object |
---|
| 541 | * is not already a String object, it will be converted to one. If the |
---|
| 542 | * String object does not have a Unicode rep, then one is create from the |
---|
| 543 | * UTF string format. |
---|
| 544 | * |
---|
| 545 | * Results: |
---|
| 546 | * Returns a pointer to the object's internal Unicode string. |
---|
| 547 | * |
---|
| 548 | * Side effects: |
---|
| 549 | * Converts the object to have the String internal rep. |
---|
| 550 | * |
---|
| 551 | *---------------------------------------------------------------------- |
---|
| 552 | */ |
---|
| 553 | |
---|
| 554 | Tcl_UniChar * |
---|
| 555 | Tcl_GetUnicodeFromObj( |
---|
| 556 | Tcl_Obj *objPtr, /* The object to find the unicode string |
---|
| 557 | * for. */ |
---|
| 558 | int *lengthPtr) /* If non-NULL, the location where the string |
---|
| 559 | * rep's unichar length should be stored. If |
---|
| 560 | * NULL, no length is stored. */ |
---|
| 561 | { |
---|
| 562 | String *stringPtr; |
---|
| 563 | |
---|
| 564 | SetStringFromAny(NULL, objPtr); |
---|
| 565 | stringPtr = GET_STRING(objPtr); |
---|
| 566 | |
---|
| 567 | if ((stringPtr->numChars == -1) || (stringPtr->hasUnicode == 0)) { |
---|
| 568 | /* |
---|
| 569 | * We haven't yet calculated the length, or all of the characters in |
---|
| 570 | * the Utf string are 1 byte chars (so we didn't store the unicode |
---|
| 571 | * str). Since this function must return a unicode string, and one has |
---|
| 572 | * not yet been stored, force the Unicode to be calculated and stored |
---|
| 573 | * now. |
---|
| 574 | */ |
---|
| 575 | |
---|
| 576 | FillUnicodeRep(objPtr); |
---|
| 577 | |
---|
| 578 | /* |
---|
| 579 | * We need to fetch the pointer again because we have just reallocated |
---|
| 580 | * the structure to make room for the Unicode data. |
---|
| 581 | */ |
---|
| 582 | |
---|
| 583 | stringPtr = GET_STRING(objPtr); |
---|
| 584 | } |
---|
| 585 | |
---|
| 586 | if (lengthPtr != NULL) { |
---|
| 587 | *lengthPtr = stringPtr->numChars; |
---|
| 588 | } |
---|
| 589 | return stringPtr->unicode; |
---|
| 590 | } |
---|
| 591 | |
---|
| 592 | /* |
---|
| 593 | *---------------------------------------------------------------------- |
---|
| 594 | * |
---|
| 595 | * Tcl_GetRange -- |
---|
| 596 | * |
---|
| 597 | * Create a Tcl Object that contains the chars between first and last of |
---|
| 598 | * the object indicated by "objPtr". If the object is not already a |
---|
| 599 | * String object, convert it to one. The first and last indices are |
---|
| 600 | * assumed to be in the appropriate range. |
---|
| 601 | * |
---|
| 602 | * Results: |
---|
| 603 | * Returns a new Tcl Object of the String type. |
---|
| 604 | * |
---|
| 605 | * Side effects: |
---|
| 606 | * Changes the internal rep of "objPtr" to the String type. |
---|
| 607 | * |
---|
| 608 | *---------------------------------------------------------------------- |
---|
| 609 | */ |
---|
| 610 | |
---|
| 611 | Tcl_Obj * |
---|
| 612 | Tcl_GetRange( |
---|
| 613 | Tcl_Obj *objPtr, /* The Tcl object to find the range of. */ |
---|
| 614 | int first, /* First index of the range. */ |
---|
| 615 | int last) /* Last index of the range. */ |
---|
| 616 | { |
---|
| 617 | Tcl_Obj *newObjPtr; /* The Tcl object to find the range of. */ |
---|
| 618 | String *stringPtr; |
---|
| 619 | |
---|
| 620 | SetStringFromAny(NULL, objPtr); |
---|
| 621 | stringPtr = GET_STRING(objPtr); |
---|
| 622 | |
---|
| 623 | if (stringPtr->numChars == -1) { |
---|
| 624 | /* |
---|
| 625 | * We haven't yet calculated the length, so we don't have the Unicode |
---|
| 626 | * str. We need to know the number of chars before we can do indexing. |
---|
| 627 | */ |
---|
| 628 | |
---|
| 629 | Tcl_GetCharLength(objPtr); |
---|
| 630 | |
---|
| 631 | /* |
---|
| 632 | * We need to fetch the pointer again because we may have just |
---|
| 633 | * reallocated the structure. |
---|
| 634 | */ |
---|
| 635 | |
---|
| 636 | stringPtr = GET_STRING(objPtr); |
---|
| 637 | } |
---|
| 638 | |
---|
| 639 | if (objPtr->bytes && (stringPtr->numChars == objPtr->length)) { |
---|
| 640 | char *str = TclGetString(objPtr); |
---|
| 641 | |
---|
| 642 | /* |
---|
| 643 | * All of the characters in the Utf string are 1 byte chars, so we |
---|
| 644 | * don't store the unicode char. Create a new string object containing |
---|
| 645 | * the specified range of chars. |
---|
| 646 | */ |
---|
| 647 | |
---|
| 648 | newObjPtr = Tcl_NewStringObj(&str[first], last-first+1); |
---|
| 649 | |
---|
| 650 | /* |
---|
| 651 | * Since we know the new string only has 1-byte chars, we can set it's |
---|
| 652 | * numChars field. |
---|
| 653 | */ |
---|
| 654 | |
---|
| 655 | SetStringFromAny(NULL, newObjPtr); |
---|
| 656 | stringPtr = GET_STRING(newObjPtr); |
---|
| 657 | stringPtr->numChars = last-first+1; |
---|
| 658 | } else { |
---|
| 659 | newObjPtr = Tcl_NewUnicodeObj(stringPtr->unicode + first, |
---|
| 660 | last-first+1); |
---|
| 661 | } |
---|
| 662 | return newObjPtr; |
---|
| 663 | } |
---|
| 664 | |
---|
| 665 | /* |
---|
| 666 | *---------------------------------------------------------------------- |
---|
| 667 | * |
---|
| 668 | * Tcl_SetStringObj -- |
---|
| 669 | * |
---|
| 670 | * Modify an object to hold a string that is a copy of the bytes |
---|
| 671 | * indicated by the byte pointer and length arguments. |
---|
| 672 | * |
---|
| 673 | * Results: |
---|
| 674 | * None. |
---|
| 675 | * |
---|
| 676 | * Side effects: |
---|
| 677 | * The object's string representation will be set to a copy of the |
---|
| 678 | * "length" bytes starting at "bytes". If "length" is negative, use bytes |
---|
| 679 | * up to the first NUL byte; i.e., assume "bytes" points to a C-style |
---|
| 680 | * NUL-terminated string. The object's old string and internal |
---|
| 681 | * representations are freed and the object's type is set NULL. |
---|
| 682 | * |
---|
| 683 | *---------------------------------------------------------------------- |
---|
| 684 | */ |
---|
| 685 | |
---|
| 686 | void |
---|
| 687 | Tcl_SetStringObj( |
---|
| 688 | register Tcl_Obj *objPtr, /* Object whose internal rep to init. */ |
---|
| 689 | const char *bytes, /* Points to the first of the length bytes |
---|
| 690 | * used to initialize the object. */ |
---|
| 691 | register int length) /* The number of bytes to copy from "bytes" |
---|
| 692 | * when initializing the object. If negative, |
---|
| 693 | * use bytes up to the first NUL byte.*/ |
---|
| 694 | { |
---|
| 695 | /* |
---|
| 696 | * Free any old string rep, then set the string rep to a copy of the |
---|
| 697 | * length bytes starting at "bytes". |
---|
| 698 | */ |
---|
| 699 | |
---|
| 700 | if (Tcl_IsShared(objPtr)) { |
---|
| 701 | Tcl_Panic("%s called with shared object", "Tcl_SetStringObj"); |
---|
| 702 | } |
---|
| 703 | |
---|
| 704 | /* |
---|
| 705 | * Set the type to NULL and free any internal rep for the old type. |
---|
| 706 | */ |
---|
| 707 | |
---|
| 708 | TclFreeIntRep(objPtr); |
---|
| 709 | objPtr->typePtr = NULL; |
---|
| 710 | |
---|
| 711 | Tcl_InvalidateStringRep(objPtr); |
---|
| 712 | if (length < 0) { |
---|
| 713 | length = (bytes? strlen(bytes) : 0); |
---|
| 714 | } |
---|
| 715 | TclInitStringRep(objPtr, bytes, length); |
---|
| 716 | } |
---|
| 717 | |
---|
| 718 | /* |
---|
| 719 | *---------------------------------------------------------------------- |
---|
| 720 | * |
---|
| 721 | * Tcl_SetObjLength -- |
---|
| 722 | * |
---|
| 723 | * This function changes the length of the string representation of an |
---|
| 724 | * object. |
---|
| 725 | * |
---|
| 726 | * Results: |
---|
| 727 | * None. |
---|
| 728 | * |
---|
| 729 | * Side effects: |
---|
| 730 | * If the size of objPtr's string representation is greater than length, |
---|
| 731 | * then it is reduced to length and a new terminating null byte is stored |
---|
| 732 | * in the strength. If the length of the string representation is greater |
---|
| 733 | * than length, the storage space is reallocated to the given length; a |
---|
| 734 | * null byte is stored at the end, but other bytes past the end of the |
---|
| 735 | * original string representation are undefined. The object's internal |
---|
| 736 | * representation is changed to "expendable string". |
---|
| 737 | * |
---|
| 738 | *---------------------------------------------------------------------- |
---|
| 739 | */ |
---|
| 740 | |
---|
| 741 | void |
---|
| 742 | Tcl_SetObjLength( |
---|
| 743 | register Tcl_Obj *objPtr, /* Pointer to object. This object must not |
---|
| 744 | * currently be shared. */ |
---|
| 745 | register int length) /* Number of bytes desired for string |
---|
| 746 | * representation of object, not including |
---|
| 747 | * terminating null byte. */ |
---|
| 748 | { |
---|
| 749 | String *stringPtr; |
---|
| 750 | |
---|
| 751 | if (Tcl_IsShared(objPtr)) { |
---|
| 752 | Tcl_Panic("%s called with shared object", "Tcl_SetObjLength"); |
---|
| 753 | } |
---|
| 754 | SetStringFromAny(NULL, objPtr); |
---|
| 755 | |
---|
| 756 | stringPtr = GET_STRING(objPtr); |
---|
| 757 | |
---|
| 758 | /* |
---|
| 759 | * Check that we're not extending a pure unicode string. |
---|
| 760 | */ |
---|
| 761 | |
---|
| 762 | if (length > (int) stringPtr->allocated && |
---|
| 763 | (objPtr->bytes != NULL || stringPtr->hasUnicode == 0)) { |
---|
| 764 | /* |
---|
| 765 | * Not enough space in current string. Reallocate the string space and |
---|
| 766 | * free the old string. |
---|
| 767 | */ |
---|
| 768 | |
---|
| 769 | if (objPtr->bytes != tclEmptyStringRep) { |
---|
| 770 | objPtr->bytes = ckrealloc((char *) objPtr->bytes, |
---|
| 771 | (unsigned) (length + 1)); |
---|
| 772 | } else { |
---|
| 773 | char *newBytes = ckalloc((unsigned) (length+1)); |
---|
| 774 | |
---|
| 775 | if (objPtr->bytes != NULL && objPtr->length != 0) { |
---|
| 776 | memcpy(newBytes, objPtr->bytes, (size_t) objPtr->length); |
---|
| 777 | Tcl_InvalidateStringRep(objPtr); |
---|
| 778 | } |
---|
| 779 | objPtr->bytes = newBytes; |
---|
| 780 | } |
---|
| 781 | stringPtr->allocated = length; |
---|
| 782 | |
---|
| 783 | /* |
---|
| 784 | * Invalidate the unicode data. |
---|
| 785 | */ |
---|
| 786 | |
---|
| 787 | stringPtr->hasUnicode = 0; |
---|
| 788 | } |
---|
| 789 | |
---|
| 790 | if (objPtr->bytes != NULL) { |
---|
| 791 | objPtr->length = length; |
---|
| 792 | if (objPtr->bytes != tclEmptyStringRep) { |
---|
| 793 | /* |
---|
| 794 | * Ensure the string is NUL-terminated. |
---|
| 795 | */ |
---|
| 796 | |
---|
| 797 | objPtr->bytes[length] = 0; |
---|
| 798 | } |
---|
| 799 | |
---|
| 800 | /* |
---|
| 801 | * Invalidate the unicode data. |
---|
| 802 | */ |
---|
| 803 | |
---|
| 804 | stringPtr->numChars = -1; |
---|
| 805 | stringPtr->hasUnicode = 0; |
---|
| 806 | } else { |
---|
| 807 | /* |
---|
| 808 | * Changing length of pure unicode string. |
---|
| 809 | */ |
---|
| 810 | |
---|
| 811 | size_t uallocated = STRING_UALLOC(length); |
---|
| 812 | |
---|
| 813 | if (uallocated > stringPtr->uallocated) { |
---|
| 814 | stringPtr = (String *) ckrealloc((char*) stringPtr, |
---|
| 815 | STRING_SIZE(uallocated)); |
---|
| 816 | SET_STRING(objPtr, stringPtr); |
---|
| 817 | stringPtr->uallocated = uallocated; |
---|
| 818 | } |
---|
| 819 | stringPtr->numChars = length; |
---|
| 820 | stringPtr->hasUnicode = (length > 0); |
---|
| 821 | |
---|
| 822 | /* |
---|
| 823 | * Ensure the string is NUL-terminated. |
---|
| 824 | */ |
---|
| 825 | |
---|
| 826 | stringPtr->unicode[length] = 0; |
---|
| 827 | stringPtr->allocated = 0; |
---|
| 828 | objPtr->length = 0; |
---|
| 829 | } |
---|
| 830 | } |
---|
| 831 | |
---|
| 832 | /* |
---|
| 833 | *---------------------------------------------------------------------- |
---|
| 834 | * |
---|
| 835 | * Tcl_AttemptSetObjLength -- |
---|
| 836 | * |
---|
| 837 | * This function changes the length of the string representation of an |
---|
| 838 | * object. It uses the attempt* (non-panic'ing) memory allocators. |
---|
| 839 | * |
---|
| 840 | * Results: |
---|
| 841 | * 1 if the requested memory was allocated, 0 otherwise. |
---|
| 842 | * |
---|
| 843 | * Side effects: |
---|
| 844 | * If the size of objPtr's string representation is greater than length, |
---|
| 845 | * then it is reduced to length and a new terminating null byte is stored |
---|
| 846 | * in the strength. If the length of the string representation is greater |
---|
| 847 | * than length, the storage space is reallocated to the given length; a |
---|
| 848 | * null byte is stored at the end, but other bytes past the end of the |
---|
| 849 | * original string representation are undefined. The object's internal |
---|
| 850 | * representation is changed to "expendable string". |
---|
| 851 | * |
---|
| 852 | *---------------------------------------------------------------------- |
---|
| 853 | */ |
---|
| 854 | |
---|
| 855 | int |
---|
| 856 | Tcl_AttemptSetObjLength( |
---|
| 857 | register Tcl_Obj *objPtr, /* Pointer to object. This object must not |
---|
| 858 | * currently be shared. */ |
---|
| 859 | register int length) /* Number of bytes desired for string |
---|
| 860 | * representation of object, not including |
---|
| 861 | * terminating null byte. */ |
---|
| 862 | { |
---|
| 863 | String *stringPtr; |
---|
| 864 | |
---|
| 865 | if (Tcl_IsShared(objPtr)) { |
---|
| 866 | Tcl_Panic("%s called with shared object", "Tcl_AttemptSetObjLength"); |
---|
| 867 | } |
---|
| 868 | SetStringFromAny(NULL, objPtr); |
---|
| 869 | |
---|
| 870 | stringPtr = GET_STRING(objPtr); |
---|
| 871 | |
---|
| 872 | /* |
---|
| 873 | * Check that we're not extending a pure unicode string. |
---|
| 874 | */ |
---|
| 875 | |
---|
| 876 | if (length > (int) stringPtr->allocated && |
---|
| 877 | (objPtr->bytes != NULL || stringPtr->hasUnicode == 0)) { |
---|
| 878 | char *newBytes; |
---|
| 879 | |
---|
| 880 | /* |
---|
| 881 | * Not enough space in current string. Reallocate the string space and |
---|
| 882 | * free the old string. |
---|
| 883 | */ |
---|
| 884 | |
---|
| 885 | if (objPtr->bytes != tclEmptyStringRep) { |
---|
| 886 | newBytes = attemptckrealloc(objPtr->bytes, |
---|
| 887 | (unsigned)(length + 1)); |
---|
| 888 | if (newBytes == NULL) { |
---|
| 889 | return 0; |
---|
| 890 | } |
---|
| 891 | } else { |
---|
| 892 | newBytes = attemptckalloc((unsigned) (length + 1)); |
---|
| 893 | if (newBytes == NULL) { |
---|
| 894 | return 0; |
---|
| 895 | } |
---|
| 896 | if (objPtr->bytes != NULL && objPtr->length != 0) { |
---|
| 897 | memcpy(newBytes, objPtr->bytes, (size_t) objPtr->length); |
---|
| 898 | Tcl_InvalidateStringRep(objPtr); |
---|
| 899 | } |
---|
| 900 | } |
---|
| 901 | objPtr->bytes = newBytes; |
---|
| 902 | stringPtr->allocated = length; |
---|
| 903 | |
---|
| 904 | /* |
---|
| 905 | * Invalidate the unicode data. |
---|
| 906 | */ |
---|
| 907 | |
---|
| 908 | stringPtr->hasUnicode = 0; |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | if (objPtr->bytes != NULL) { |
---|
| 912 | objPtr->length = length; |
---|
| 913 | if (objPtr->bytes != tclEmptyStringRep) { |
---|
| 914 | /* |
---|
| 915 | * Ensure the string is NULL-terminated. |
---|
| 916 | */ |
---|
| 917 | |
---|
| 918 | objPtr->bytes[length] = 0; |
---|
| 919 | } |
---|
| 920 | |
---|
| 921 | /* |
---|
| 922 | * Invalidate the unicode data. |
---|
| 923 | */ |
---|
| 924 | |
---|
| 925 | stringPtr->numChars = -1; |
---|
| 926 | stringPtr->hasUnicode = 0; |
---|
| 927 | } else { |
---|
| 928 | /* |
---|
| 929 | * Changing length of pure unicode string. |
---|
| 930 | */ |
---|
| 931 | |
---|
| 932 | size_t uallocated = STRING_UALLOC(length); |
---|
| 933 | |
---|
| 934 | if (uallocated > stringPtr->uallocated) { |
---|
| 935 | stringPtr = (String *) attemptckrealloc((char*) stringPtr, |
---|
| 936 | STRING_SIZE(uallocated)); |
---|
| 937 | if (stringPtr == NULL) { |
---|
| 938 | return 0; |
---|
| 939 | } |
---|
| 940 | SET_STRING(objPtr, stringPtr); |
---|
| 941 | stringPtr->uallocated = uallocated; |
---|
| 942 | } |
---|
| 943 | stringPtr->numChars = length; |
---|
| 944 | stringPtr->hasUnicode = (length > 0); |
---|
| 945 | |
---|
| 946 | /* |
---|
| 947 | * Ensure the string is NUL-terminated. |
---|
| 948 | */ |
---|
| 949 | |
---|
| 950 | stringPtr->unicode[length] = 0; |
---|
| 951 | stringPtr->allocated = 0; |
---|
| 952 | objPtr->length = 0; |
---|
| 953 | } |
---|
| 954 | return 1; |
---|
| 955 | } |
---|
| 956 | |
---|
| 957 | /* |
---|
| 958 | *--------------------------------------------------------------------------- |
---|
| 959 | * |
---|
| 960 | * TclSetUnicodeObj -- |
---|
| 961 | * |
---|
| 962 | * Modify an object to hold the Unicode string indicated by "unicode". |
---|
| 963 | * |
---|
| 964 | * Results: |
---|
| 965 | * None. |
---|
| 966 | * |
---|
| 967 | * Side effects: |
---|
| 968 | * Memory allocated for new "String" internal rep. |
---|
| 969 | * |
---|
| 970 | *--------------------------------------------------------------------------- |
---|
| 971 | */ |
---|
| 972 | |
---|
| 973 | void |
---|
| 974 | Tcl_SetUnicodeObj( |
---|
| 975 | Tcl_Obj *objPtr, /* The object to set the string of. */ |
---|
| 976 | const Tcl_UniChar *unicode, /* The unicode string used to initialize the |
---|
| 977 | * object. */ |
---|
| 978 | int numChars) /* Number of characters in the unicode |
---|
| 979 | * string. */ |
---|
| 980 | { |
---|
| 981 | String *stringPtr; |
---|
| 982 | size_t uallocated; |
---|
| 983 | |
---|
| 984 | if (numChars < 0) { |
---|
| 985 | numChars = 0; |
---|
| 986 | if (unicode) { |
---|
| 987 | while (unicode[numChars] != 0) { |
---|
| 988 | numChars++; |
---|
| 989 | } |
---|
| 990 | } |
---|
| 991 | } |
---|
| 992 | uallocated = STRING_UALLOC(numChars); |
---|
| 993 | |
---|
| 994 | /* |
---|
| 995 | * Free the internal rep if one exists, and invalidate the string rep. |
---|
| 996 | */ |
---|
| 997 | |
---|
| 998 | TclFreeIntRep(objPtr); |
---|
| 999 | objPtr->typePtr = &tclStringType; |
---|
| 1000 | |
---|
| 1001 | /* |
---|
| 1002 | * Allocate enough space for the String structure + Unicode string. |
---|
| 1003 | */ |
---|
| 1004 | |
---|
| 1005 | stringPtr = (String *) ckalloc(STRING_SIZE(uallocated)); |
---|
| 1006 | stringPtr->numChars = numChars; |
---|
| 1007 | stringPtr->uallocated = uallocated; |
---|
| 1008 | stringPtr->hasUnicode = (numChars > 0); |
---|
| 1009 | stringPtr->allocated = 0; |
---|
| 1010 | memcpy(stringPtr->unicode, unicode, uallocated); |
---|
| 1011 | stringPtr->unicode[numChars] = 0; |
---|
| 1012 | |
---|
| 1013 | SET_STRING(objPtr, stringPtr); |
---|
| 1014 | Tcl_InvalidateStringRep(objPtr); |
---|
| 1015 | return; |
---|
| 1016 | } |
---|
| 1017 | |
---|
| 1018 | /* |
---|
| 1019 | *---------------------------------------------------------------------- |
---|
| 1020 | * |
---|
| 1021 | * Tcl_AppendLimitedToObj -- |
---|
| 1022 | * |
---|
| 1023 | * This function appends a limited number of bytes from a sequence of |
---|
| 1024 | * bytes to an object, marking any limitation with an ellipsis. |
---|
| 1025 | * |
---|
| 1026 | * Results: |
---|
| 1027 | * None. |
---|
| 1028 | * |
---|
| 1029 | * Side effects: |
---|
| 1030 | * The bytes at *bytes are appended to the string representation of |
---|
| 1031 | * objPtr. |
---|
| 1032 | * |
---|
| 1033 | *---------------------------------------------------------------------- |
---|
| 1034 | */ |
---|
| 1035 | |
---|
| 1036 | void |
---|
| 1037 | Tcl_AppendLimitedToObj( |
---|
| 1038 | register Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1039 | const char *bytes, /* Points to the bytes to append to the |
---|
| 1040 | * object. */ |
---|
| 1041 | register int length, /* The number of bytes available to be |
---|
| 1042 | * appended from "bytes". If < 0, then all |
---|
| 1043 | * bytes up to a NUL byte are available. */ |
---|
| 1044 | register int limit, /* The maximum number of bytes to append to |
---|
| 1045 | * the object. */ |
---|
| 1046 | const char *ellipsis) /* Ellipsis marker string, appended to the |
---|
| 1047 | * object to indicate not all available bytes |
---|
| 1048 | * at "bytes" were appended. */ |
---|
| 1049 | { |
---|
| 1050 | String *stringPtr; |
---|
| 1051 | int toCopy = 0; |
---|
| 1052 | |
---|
| 1053 | if (Tcl_IsShared(objPtr)) { |
---|
| 1054 | Tcl_Panic("%s called with shared object", "Tcl_AppendLimitedToObj"); |
---|
| 1055 | } |
---|
| 1056 | |
---|
| 1057 | SetStringFromAny(NULL, objPtr); |
---|
| 1058 | |
---|
| 1059 | if (length < 0) { |
---|
| 1060 | length = (bytes ? strlen(bytes) : 0); |
---|
| 1061 | } |
---|
| 1062 | if (length == 0) { |
---|
| 1063 | return; |
---|
| 1064 | } |
---|
| 1065 | |
---|
| 1066 | if (length <= limit) { |
---|
| 1067 | toCopy = length; |
---|
| 1068 | } else { |
---|
| 1069 | if (ellipsis == NULL) { |
---|
| 1070 | ellipsis = "..."; |
---|
| 1071 | } |
---|
| 1072 | toCopy = Tcl_UtfPrev(bytes+limit+1-strlen(ellipsis), bytes) - bytes; |
---|
| 1073 | } |
---|
| 1074 | |
---|
| 1075 | /* |
---|
| 1076 | * If objPtr has a valid Unicode rep, then append the Unicode conversion |
---|
| 1077 | * of "bytes" to the objPtr's Unicode rep, otherwise append "bytes" to |
---|
| 1078 | * objPtr's string rep. |
---|
| 1079 | */ |
---|
| 1080 | |
---|
| 1081 | stringPtr = GET_STRING(objPtr); |
---|
| 1082 | if (stringPtr->hasUnicode != 0) { |
---|
| 1083 | AppendUtfToUnicodeRep(objPtr, bytes, toCopy); |
---|
| 1084 | } else { |
---|
| 1085 | AppendUtfToUtfRep(objPtr, bytes, toCopy); |
---|
| 1086 | } |
---|
| 1087 | |
---|
| 1088 | if (length <= limit) { |
---|
| 1089 | return; |
---|
| 1090 | } |
---|
| 1091 | |
---|
| 1092 | stringPtr = GET_STRING(objPtr); |
---|
| 1093 | if (stringPtr->hasUnicode != 0) { |
---|
| 1094 | AppendUtfToUnicodeRep(objPtr, ellipsis, -1); |
---|
| 1095 | } else { |
---|
| 1096 | AppendUtfToUtfRep(objPtr, ellipsis, -1); |
---|
| 1097 | } |
---|
| 1098 | } |
---|
| 1099 | |
---|
| 1100 | /* |
---|
| 1101 | *---------------------------------------------------------------------- |
---|
| 1102 | * |
---|
| 1103 | * Tcl_AppendToObj -- |
---|
| 1104 | * |
---|
| 1105 | * This function appends a sequence of bytes to an object. |
---|
| 1106 | * |
---|
| 1107 | * Results: |
---|
| 1108 | * None. |
---|
| 1109 | * |
---|
| 1110 | * Side effects: |
---|
| 1111 | * The bytes at *bytes are appended to the string representation of |
---|
| 1112 | * objPtr. |
---|
| 1113 | * |
---|
| 1114 | *---------------------------------------------------------------------- |
---|
| 1115 | */ |
---|
| 1116 | |
---|
| 1117 | void |
---|
| 1118 | Tcl_AppendToObj( |
---|
| 1119 | register Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1120 | const char *bytes, /* Points to the bytes to append to the |
---|
| 1121 | * object. */ |
---|
| 1122 | register int length) /* The number of bytes to append from "bytes". |
---|
| 1123 | * If < 0, then append all bytes up to NUL |
---|
| 1124 | * byte. */ |
---|
| 1125 | { |
---|
| 1126 | Tcl_AppendLimitedToObj(objPtr, bytes, length, INT_MAX, NULL); |
---|
| 1127 | } |
---|
| 1128 | |
---|
| 1129 | /* |
---|
| 1130 | *---------------------------------------------------------------------- |
---|
| 1131 | * |
---|
| 1132 | * Tcl_AppendUnicodeToObj -- |
---|
| 1133 | * |
---|
| 1134 | * This function appends a Unicode string to an object in the most |
---|
| 1135 | * efficient manner possible. Length must be >= 0. |
---|
| 1136 | * |
---|
| 1137 | * Results: |
---|
| 1138 | * None. |
---|
| 1139 | * |
---|
| 1140 | * Side effects: |
---|
| 1141 | * Invalidates the string rep and creates a new Unicode string. |
---|
| 1142 | * |
---|
| 1143 | *---------------------------------------------------------------------- |
---|
| 1144 | */ |
---|
| 1145 | |
---|
| 1146 | void |
---|
| 1147 | Tcl_AppendUnicodeToObj( |
---|
| 1148 | register Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1149 | const Tcl_UniChar *unicode, /* The unicode string to append to the |
---|
| 1150 | * object. */ |
---|
| 1151 | int length) /* Number of chars in "unicode". */ |
---|
| 1152 | { |
---|
| 1153 | String *stringPtr; |
---|
| 1154 | |
---|
| 1155 | if (Tcl_IsShared(objPtr)) { |
---|
| 1156 | Tcl_Panic("%s called with shared object", "Tcl_AppendUnicodeToObj"); |
---|
| 1157 | } |
---|
| 1158 | |
---|
| 1159 | if (length == 0) { |
---|
| 1160 | return; |
---|
| 1161 | } |
---|
| 1162 | |
---|
| 1163 | SetStringFromAny(NULL, objPtr); |
---|
| 1164 | stringPtr = GET_STRING(objPtr); |
---|
| 1165 | |
---|
| 1166 | /* |
---|
| 1167 | * If objPtr has a valid Unicode rep, then append the "unicode" to the |
---|
| 1168 | * objPtr's Unicode rep, otherwise the UTF conversion of "unicode" to |
---|
| 1169 | * objPtr's string rep. |
---|
| 1170 | */ |
---|
| 1171 | |
---|
| 1172 | if (stringPtr->hasUnicode != 0) { |
---|
| 1173 | AppendUnicodeToUnicodeRep(objPtr, unicode, length); |
---|
| 1174 | } else { |
---|
| 1175 | AppendUnicodeToUtfRep(objPtr, unicode, length); |
---|
| 1176 | } |
---|
| 1177 | } |
---|
| 1178 | |
---|
| 1179 | /* |
---|
| 1180 | *---------------------------------------------------------------------- |
---|
| 1181 | * |
---|
| 1182 | * Tcl_AppendObjToObj -- |
---|
| 1183 | * |
---|
| 1184 | * This function appends the string rep of one object to another. |
---|
| 1185 | * "objPtr" cannot be a shared object. |
---|
| 1186 | * |
---|
| 1187 | * Results: |
---|
| 1188 | * None. |
---|
| 1189 | * |
---|
| 1190 | * Side effects: |
---|
| 1191 | * The string rep of appendObjPtr is appended to the string |
---|
| 1192 | * representation of objPtr. |
---|
| 1193 | * |
---|
| 1194 | *---------------------------------------------------------------------- |
---|
| 1195 | */ |
---|
| 1196 | |
---|
| 1197 | void |
---|
| 1198 | Tcl_AppendObjToObj( |
---|
| 1199 | Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1200 | Tcl_Obj *appendObjPtr) /* Object to append. */ |
---|
| 1201 | { |
---|
| 1202 | String *stringPtr; |
---|
| 1203 | int length, numChars, allOneByteChars; |
---|
| 1204 | char *bytes; |
---|
| 1205 | |
---|
| 1206 | SetStringFromAny(NULL, objPtr); |
---|
| 1207 | |
---|
| 1208 | /* |
---|
| 1209 | * If objPtr has a valid Unicode rep, then get a Unicode string from |
---|
| 1210 | * appendObjPtr and append it. |
---|
| 1211 | */ |
---|
| 1212 | |
---|
| 1213 | stringPtr = GET_STRING(objPtr); |
---|
| 1214 | if (stringPtr->hasUnicode != 0) { |
---|
| 1215 | /* |
---|
| 1216 | * If appendObjPtr is not of the "String" type, don't convert it. |
---|
| 1217 | */ |
---|
| 1218 | |
---|
| 1219 | if (appendObjPtr->typePtr == &tclStringType) { |
---|
| 1220 | stringPtr = GET_STRING(appendObjPtr); |
---|
| 1221 | if ((stringPtr->numChars == -1) || (stringPtr->hasUnicode == 0)) { |
---|
| 1222 | /* |
---|
| 1223 | * If appendObjPtr is a string obj with no valid Unicode rep, |
---|
| 1224 | * then fill its unicode rep. |
---|
| 1225 | */ |
---|
| 1226 | |
---|
| 1227 | FillUnicodeRep(appendObjPtr); |
---|
| 1228 | stringPtr = GET_STRING(appendObjPtr); |
---|
| 1229 | } |
---|
| 1230 | AppendUnicodeToUnicodeRep(objPtr, stringPtr->unicode, |
---|
| 1231 | stringPtr->numChars); |
---|
| 1232 | } else { |
---|
| 1233 | bytes = TclGetStringFromObj(appendObjPtr, &length); |
---|
| 1234 | AppendUtfToUnicodeRep(objPtr, bytes, length); |
---|
| 1235 | } |
---|
| 1236 | return; |
---|
| 1237 | } |
---|
| 1238 | |
---|
| 1239 | /* |
---|
| 1240 | * Append to objPtr's UTF string rep. If we know the number of characters |
---|
| 1241 | * in both objects before appending, then set the combined number of |
---|
| 1242 | * characters in the final (appended-to) object. |
---|
| 1243 | */ |
---|
| 1244 | |
---|
| 1245 | bytes = TclGetStringFromObj(appendObjPtr, &length); |
---|
| 1246 | |
---|
| 1247 | allOneByteChars = 0; |
---|
| 1248 | numChars = stringPtr->numChars; |
---|
| 1249 | if ((numChars >= 0) && (appendObjPtr->typePtr == &tclStringType)) { |
---|
| 1250 | stringPtr = GET_STRING(appendObjPtr); |
---|
| 1251 | if ((stringPtr->numChars >= 0) && (stringPtr->numChars == length)) { |
---|
| 1252 | numChars += stringPtr->numChars; |
---|
| 1253 | allOneByteChars = 1; |
---|
| 1254 | } |
---|
| 1255 | } |
---|
| 1256 | |
---|
| 1257 | AppendUtfToUtfRep(objPtr, bytes, length); |
---|
| 1258 | |
---|
| 1259 | if (allOneByteChars) { |
---|
| 1260 | stringPtr = GET_STRING(objPtr); |
---|
| 1261 | stringPtr->numChars = numChars; |
---|
| 1262 | } |
---|
| 1263 | } |
---|
| 1264 | |
---|
| 1265 | /* |
---|
| 1266 | *---------------------------------------------------------------------- |
---|
| 1267 | * |
---|
| 1268 | * AppendUnicodeToUnicodeRep -- |
---|
| 1269 | * |
---|
| 1270 | * This function appends the contents of "unicode" to the Unicode rep of |
---|
| 1271 | * "objPtr". objPtr must already have a valid Unicode rep. |
---|
| 1272 | * |
---|
| 1273 | * Results: |
---|
| 1274 | * None. |
---|
| 1275 | * |
---|
| 1276 | * Side effects: |
---|
| 1277 | * objPtr's internal rep is reallocated. |
---|
| 1278 | * |
---|
| 1279 | *---------------------------------------------------------------------- |
---|
| 1280 | */ |
---|
| 1281 | |
---|
| 1282 | static void |
---|
| 1283 | AppendUnicodeToUnicodeRep( |
---|
| 1284 | Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1285 | const Tcl_UniChar *unicode, /* String to append. */ |
---|
| 1286 | int appendNumChars) /* Number of chars of "unicode" to append. */ |
---|
| 1287 | { |
---|
| 1288 | String *stringPtr, *tmpString; |
---|
| 1289 | size_t numChars; |
---|
| 1290 | |
---|
| 1291 | if (appendNumChars < 0) { |
---|
| 1292 | appendNumChars = 0; |
---|
| 1293 | if (unicode) { |
---|
| 1294 | while (unicode[appendNumChars] != 0) { |
---|
| 1295 | appendNumChars++; |
---|
| 1296 | } |
---|
| 1297 | } |
---|
| 1298 | } |
---|
| 1299 | if (appendNumChars == 0) { |
---|
| 1300 | return; |
---|
| 1301 | } |
---|
| 1302 | |
---|
| 1303 | SetStringFromAny(NULL, objPtr); |
---|
| 1304 | stringPtr = GET_STRING(objPtr); |
---|
| 1305 | |
---|
| 1306 | /* |
---|
| 1307 | * If not enough space has been allocated for the unicode rep, reallocate |
---|
| 1308 | * the internal rep object with additional space. First try to double the |
---|
| 1309 | * required allocation; if that fails, try a more modest increase. See the |
---|
| 1310 | * "TCL STRING GROWTH ALGORITHM" comment at the top of this file for an |
---|
| 1311 | * explanation of this growth algorithm. |
---|
| 1312 | */ |
---|
| 1313 | |
---|
| 1314 | numChars = stringPtr->numChars + appendNumChars; |
---|
| 1315 | |
---|
| 1316 | if (STRING_UALLOC(numChars) >= stringPtr->uallocated) { |
---|
| 1317 | stringPtr->uallocated = STRING_UALLOC(2 * numChars); |
---|
| 1318 | tmpString = (String *) attemptckrealloc((char *)stringPtr, |
---|
| 1319 | STRING_SIZE(stringPtr->uallocated)); |
---|
| 1320 | if (tmpString == NULL) { |
---|
| 1321 | stringPtr->uallocated = |
---|
| 1322 | STRING_UALLOC(numChars + appendNumChars) |
---|
| 1323 | + TCL_GROWTH_MIN_ALLOC; |
---|
| 1324 | tmpString = (String *) ckrealloc((char *)stringPtr, |
---|
| 1325 | STRING_SIZE(stringPtr->uallocated)); |
---|
| 1326 | } |
---|
| 1327 | stringPtr = tmpString; |
---|
| 1328 | SET_STRING(objPtr, stringPtr); |
---|
| 1329 | } |
---|
| 1330 | |
---|
| 1331 | /* |
---|
| 1332 | * Copy the new string onto the end of the old string, then add the |
---|
| 1333 | * trailing null. |
---|
| 1334 | */ |
---|
| 1335 | |
---|
| 1336 | memcpy(stringPtr->unicode + stringPtr->numChars, unicode, |
---|
| 1337 | appendNumChars * sizeof(Tcl_UniChar)); |
---|
| 1338 | stringPtr->unicode[numChars] = 0; |
---|
| 1339 | stringPtr->numChars = numChars; |
---|
| 1340 | |
---|
| 1341 | Tcl_InvalidateStringRep(objPtr); |
---|
| 1342 | } |
---|
| 1343 | |
---|
| 1344 | /* |
---|
| 1345 | *---------------------------------------------------------------------- |
---|
| 1346 | * |
---|
| 1347 | * AppendUnicodeToUtfRep -- |
---|
| 1348 | * |
---|
| 1349 | * This function converts the contents of "unicode" to UTF and appends |
---|
| 1350 | * the UTF to the string rep of "objPtr". |
---|
| 1351 | * |
---|
| 1352 | * Results: |
---|
| 1353 | * None. |
---|
| 1354 | * |
---|
| 1355 | * Side effects: |
---|
| 1356 | * objPtr's internal rep is reallocated. |
---|
| 1357 | * |
---|
| 1358 | *---------------------------------------------------------------------- |
---|
| 1359 | */ |
---|
| 1360 | |
---|
| 1361 | static void |
---|
| 1362 | AppendUnicodeToUtfRep( |
---|
| 1363 | Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1364 | const Tcl_UniChar *unicode, /* String to convert to UTF. */ |
---|
| 1365 | int numChars) /* Number of chars of "unicode" to convert. */ |
---|
| 1366 | { |
---|
| 1367 | Tcl_DString dsPtr; |
---|
| 1368 | const char *bytes; |
---|
| 1369 | |
---|
| 1370 | if (numChars < 0) { |
---|
| 1371 | numChars = 0; |
---|
| 1372 | if (unicode) { |
---|
| 1373 | while (unicode[numChars] != 0) { |
---|
| 1374 | numChars++; |
---|
| 1375 | } |
---|
| 1376 | } |
---|
| 1377 | } |
---|
| 1378 | if (numChars == 0) { |
---|
| 1379 | return; |
---|
| 1380 | } |
---|
| 1381 | |
---|
| 1382 | Tcl_DStringInit(&dsPtr); |
---|
| 1383 | bytes = Tcl_UniCharToUtfDString(unicode, numChars, &dsPtr); |
---|
| 1384 | AppendUtfToUtfRep(objPtr, bytes, Tcl_DStringLength(&dsPtr)); |
---|
| 1385 | Tcl_DStringFree(&dsPtr); |
---|
| 1386 | } |
---|
| 1387 | |
---|
| 1388 | /* |
---|
| 1389 | *---------------------------------------------------------------------- |
---|
| 1390 | * |
---|
| 1391 | * AppendUtfToUnicodeRep -- |
---|
| 1392 | * |
---|
| 1393 | * This function converts the contents of "bytes" to Unicode and appends |
---|
| 1394 | * the Unicode to the Unicode rep of "objPtr". objPtr must already have a |
---|
| 1395 | * valid Unicode rep. |
---|
| 1396 | * |
---|
| 1397 | * Results: |
---|
| 1398 | * None. |
---|
| 1399 | * |
---|
| 1400 | * Side effects: |
---|
| 1401 | * objPtr's internal rep is reallocated. |
---|
| 1402 | * |
---|
| 1403 | *---------------------------------------------------------------------- |
---|
| 1404 | */ |
---|
| 1405 | |
---|
| 1406 | static void |
---|
| 1407 | AppendUtfToUnicodeRep( |
---|
| 1408 | Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1409 | const char *bytes, /* String to convert to Unicode. */ |
---|
| 1410 | int numBytes) /* Number of bytes of "bytes" to convert. */ |
---|
| 1411 | { |
---|
| 1412 | Tcl_DString dsPtr; |
---|
| 1413 | int numChars; |
---|
| 1414 | Tcl_UniChar *unicode; |
---|
| 1415 | |
---|
| 1416 | if (numBytes < 0) { |
---|
| 1417 | numBytes = (bytes ? strlen(bytes) : 0); |
---|
| 1418 | } |
---|
| 1419 | if (numBytes == 0) { |
---|
| 1420 | return; |
---|
| 1421 | } |
---|
| 1422 | |
---|
| 1423 | Tcl_DStringInit(&dsPtr); |
---|
| 1424 | numChars = Tcl_NumUtfChars(bytes, numBytes); |
---|
| 1425 | unicode = (Tcl_UniChar *)Tcl_UtfToUniCharDString(bytes, numBytes, &dsPtr); |
---|
| 1426 | AppendUnicodeToUnicodeRep(objPtr, unicode, numChars); |
---|
| 1427 | Tcl_DStringFree(&dsPtr); |
---|
| 1428 | } |
---|
| 1429 | |
---|
| 1430 | /* |
---|
| 1431 | *---------------------------------------------------------------------- |
---|
| 1432 | * |
---|
| 1433 | * AppendUtfToUtfRep -- |
---|
| 1434 | * |
---|
| 1435 | * This function appends "numBytes" bytes of "bytes" to the UTF string |
---|
| 1436 | * rep of "objPtr". objPtr must already have a valid String rep. |
---|
| 1437 | * |
---|
| 1438 | * Results: |
---|
| 1439 | * None. |
---|
| 1440 | * |
---|
| 1441 | * Side effects: |
---|
| 1442 | * objPtr's internal rep is reallocated. |
---|
| 1443 | * |
---|
| 1444 | *---------------------------------------------------------------------- |
---|
| 1445 | */ |
---|
| 1446 | |
---|
| 1447 | static void |
---|
| 1448 | AppendUtfToUtfRep( |
---|
| 1449 | Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1450 | const char *bytes, /* String to append. */ |
---|
| 1451 | int numBytes) /* Number of bytes of "bytes" to append. */ |
---|
| 1452 | { |
---|
| 1453 | String *stringPtr; |
---|
| 1454 | int newLength, oldLength; |
---|
| 1455 | |
---|
| 1456 | if (numBytes < 0) { |
---|
| 1457 | numBytes = (bytes ? strlen(bytes) : 0); |
---|
| 1458 | } |
---|
| 1459 | if (numBytes == 0) { |
---|
| 1460 | return; |
---|
| 1461 | } |
---|
| 1462 | |
---|
| 1463 | /* |
---|
| 1464 | * Copy the new string onto the end of the old string, then add the |
---|
| 1465 | * trailing null. |
---|
| 1466 | */ |
---|
| 1467 | |
---|
| 1468 | oldLength = objPtr->length; |
---|
| 1469 | newLength = numBytes + oldLength; |
---|
| 1470 | |
---|
| 1471 | stringPtr = GET_STRING(objPtr); |
---|
| 1472 | if (newLength > (int) stringPtr->allocated) { |
---|
| 1473 | /* |
---|
| 1474 | * There isn't currently enough space in the string representation so |
---|
| 1475 | * allocate additional space. First, try to double the length |
---|
| 1476 | * required. If that fails, try a more modest allocation. See the "TCL |
---|
| 1477 | * STRING GROWTH ALGORITHM" comment at the top of this file for an |
---|
| 1478 | * explanation of this growth algorithm. |
---|
| 1479 | */ |
---|
| 1480 | |
---|
| 1481 | if (Tcl_AttemptSetObjLength(objPtr, 2 * newLength) == 0) { |
---|
| 1482 | Tcl_SetObjLength(objPtr, |
---|
| 1483 | newLength + numBytes + TCL_GROWTH_MIN_ALLOC); |
---|
| 1484 | } |
---|
| 1485 | } |
---|
| 1486 | |
---|
| 1487 | /* |
---|
| 1488 | * Invalidate the unicode data. |
---|
| 1489 | */ |
---|
| 1490 | |
---|
| 1491 | stringPtr->numChars = -1; |
---|
| 1492 | stringPtr->hasUnicode = 0; |
---|
| 1493 | |
---|
| 1494 | memcpy(objPtr->bytes + oldLength, bytes, (size_t) numBytes); |
---|
| 1495 | objPtr->bytes[newLength] = 0; |
---|
| 1496 | objPtr->length = newLength; |
---|
| 1497 | } |
---|
| 1498 | |
---|
| 1499 | /* |
---|
| 1500 | *---------------------------------------------------------------------- |
---|
| 1501 | * |
---|
| 1502 | * Tcl_AppendStringsToObjVA -- |
---|
| 1503 | * |
---|
| 1504 | * This function appends one or more null-terminated strings to an |
---|
| 1505 | * object. |
---|
| 1506 | * |
---|
| 1507 | * Results: |
---|
| 1508 | * None. |
---|
| 1509 | * |
---|
| 1510 | * Side effects: |
---|
| 1511 | * The contents of all the string arguments are appended to the string |
---|
| 1512 | * representation of objPtr. |
---|
| 1513 | * |
---|
| 1514 | *---------------------------------------------------------------------- |
---|
| 1515 | */ |
---|
| 1516 | |
---|
| 1517 | void |
---|
| 1518 | Tcl_AppendStringsToObjVA( |
---|
| 1519 | Tcl_Obj *objPtr, /* Points to the object to append to. */ |
---|
| 1520 | va_list argList) /* Variable argument list. */ |
---|
| 1521 | { |
---|
| 1522 | #define STATIC_LIST_SIZE 16 |
---|
| 1523 | String *stringPtr; |
---|
| 1524 | int newLength, oldLength, attemptLength; |
---|
| 1525 | register char *string, *dst; |
---|
| 1526 | char *static_list[STATIC_LIST_SIZE]; |
---|
| 1527 | char **args = static_list; |
---|
| 1528 | int nargs_space = STATIC_LIST_SIZE; |
---|
| 1529 | int nargs, i; |
---|
| 1530 | |
---|
| 1531 | if (Tcl_IsShared(objPtr)) { |
---|
| 1532 | Tcl_Panic("%s called with shared object", "Tcl_AppendStringsToObj"); |
---|
| 1533 | } |
---|
| 1534 | |
---|
| 1535 | SetStringFromAny(NULL, objPtr); |
---|
| 1536 | |
---|
| 1537 | /* |
---|
| 1538 | * Figure out how much space is needed for all the strings, and expand the |
---|
| 1539 | * string representation if it isn't big enough. If no bytes would be |
---|
| 1540 | * appended, just return. Note that on some platforms (notably OS/390) the |
---|
| 1541 | * argList is an array so we need to use memcpy. |
---|
| 1542 | */ |
---|
| 1543 | |
---|
| 1544 | nargs = 0; |
---|
| 1545 | newLength = 0; |
---|
| 1546 | oldLength = objPtr->length; |
---|
| 1547 | while (1) { |
---|
| 1548 | string = va_arg(argList, char *); |
---|
| 1549 | if (string == NULL) { |
---|
| 1550 | break; |
---|
| 1551 | } |
---|
| 1552 | if (nargs >= nargs_space) { |
---|
| 1553 | /* |
---|
| 1554 | * Expand the args buffer. |
---|
| 1555 | */ |
---|
| 1556 | |
---|
| 1557 | nargs_space += STATIC_LIST_SIZE; |
---|
| 1558 | if (args == static_list) { |
---|
| 1559 | args = (void *) ckalloc(nargs_space * sizeof(char *)); |
---|
| 1560 | for (i = 0; i < nargs; ++i) { |
---|
| 1561 | args[i] = static_list[i]; |
---|
| 1562 | } |
---|
| 1563 | } else { |
---|
| 1564 | args = (void *) ckrealloc((void *) args, |
---|
| 1565 | nargs_space * sizeof(char *)); |
---|
| 1566 | } |
---|
| 1567 | } |
---|
| 1568 | newLength += strlen(string); |
---|
| 1569 | args[nargs++] = string; |
---|
| 1570 | } |
---|
| 1571 | if (newLength == 0) { |
---|
| 1572 | goto done; |
---|
| 1573 | } |
---|
| 1574 | |
---|
| 1575 | stringPtr = GET_STRING(objPtr); |
---|
| 1576 | if (oldLength + newLength > (int) stringPtr->allocated) { |
---|
| 1577 | /* |
---|
| 1578 | * There isn't currently enough space in the string representation, so |
---|
| 1579 | * allocate additional space. If the current string representation |
---|
| 1580 | * isn't empty (i.e. it looks like we're doing a series of appends) |
---|
| 1581 | * then try to allocate extra space to accomodate future growth: first |
---|
| 1582 | * try to double the required memory; if that fails, try a more modest |
---|
| 1583 | * allocation. See the "TCL STRING GROWTH ALGORITHM" comment at the |
---|
| 1584 | * top of this file for an explanation of this growth algorithm. |
---|
| 1585 | * Otherwise, if the current string representation is empty, exactly |
---|
| 1586 | * enough memory is allocated. |
---|
| 1587 | */ |
---|
| 1588 | |
---|
| 1589 | if (oldLength == 0) { |
---|
| 1590 | Tcl_SetObjLength(objPtr, newLength); |
---|
| 1591 | } else { |
---|
| 1592 | attemptLength = 2 * (oldLength + newLength); |
---|
| 1593 | if (Tcl_AttemptSetObjLength(objPtr, attemptLength) == 0) { |
---|
| 1594 | attemptLength = oldLength + (2 * newLength) + |
---|
| 1595 | TCL_GROWTH_MIN_ALLOC; |
---|
| 1596 | Tcl_SetObjLength(objPtr, attemptLength); |
---|
| 1597 | } |
---|
| 1598 | } |
---|
| 1599 | } |
---|
| 1600 | |
---|
| 1601 | /* |
---|
| 1602 | * Make a second pass through the arguments, appending all the strings to |
---|
| 1603 | * the object. |
---|
| 1604 | */ |
---|
| 1605 | |
---|
| 1606 | dst = objPtr->bytes + oldLength; |
---|
| 1607 | for (i = 0; i < nargs; ++i) { |
---|
| 1608 | string = args[i]; |
---|
| 1609 | if (string == NULL) { |
---|
| 1610 | break; |
---|
| 1611 | } |
---|
| 1612 | while (*string != 0) { |
---|
| 1613 | *dst = *string; |
---|
| 1614 | dst++; |
---|
| 1615 | string++; |
---|
| 1616 | } |
---|
| 1617 | } |
---|
| 1618 | |
---|
| 1619 | /* |
---|
| 1620 | * Add a null byte to terminate the string. However, be careful: it's |
---|
| 1621 | * possible that the object is totally empty (if it was empty originally |
---|
| 1622 | * and there was nothing to append). In this case dst is NULL; just leave |
---|
| 1623 | * everything alone. |
---|
| 1624 | */ |
---|
| 1625 | |
---|
| 1626 | if (dst != NULL) { |
---|
| 1627 | *dst = 0; |
---|
| 1628 | } |
---|
| 1629 | objPtr->length = oldLength + newLength; |
---|
| 1630 | |
---|
| 1631 | done: |
---|
| 1632 | /* |
---|
| 1633 | * If we had to allocate a buffer from the heap, free it now. |
---|
| 1634 | */ |
---|
| 1635 | |
---|
| 1636 | if (args != static_list) { |
---|
| 1637 | ckfree((void *) args); |
---|
| 1638 | } |
---|
| 1639 | #undef STATIC_LIST_SIZE |
---|
| 1640 | } |
---|
| 1641 | |
---|
| 1642 | /* |
---|
| 1643 | *---------------------------------------------------------------------- |
---|
| 1644 | * |
---|
| 1645 | * Tcl_AppendStringsToObj -- |
---|
| 1646 | * |
---|
| 1647 | * This function appends one or more null-terminated strings to an |
---|
| 1648 | * object. |
---|
| 1649 | * |
---|
| 1650 | * Results: |
---|
| 1651 | * None. |
---|
| 1652 | * |
---|
| 1653 | * Side effects: |
---|
| 1654 | * The contents of all the string arguments are appended to the string |
---|
| 1655 | * representation of objPtr. |
---|
| 1656 | * |
---|
| 1657 | *---------------------------------------------------------------------- |
---|
| 1658 | */ |
---|
| 1659 | |
---|
| 1660 | void |
---|
| 1661 | Tcl_AppendStringsToObj( |
---|
| 1662 | Tcl_Obj *objPtr, |
---|
| 1663 | ...) |
---|
| 1664 | { |
---|
| 1665 | va_list argList; |
---|
| 1666 | |
---|
| 1667 | va_start(argList, objPtr); |
---|
| 1668 | Tcl_AppendStringsToObjVA(objPtr, argList); |
---|
| 1669 | va_end(argList); |
---|
| 1670 | } |
---|
| 1671 | |
---|
| 1672 | /* |
---|
| 1673 | *---------------------------------------------------------------------- |
---|
| 1674 | * |
---|
| 1675 | * Tcl_AppendFormatToObj -- |
---|
| 1676 | * |
---|
| 1677 | * This function appends a list of Tcl_Obj's to a Tcl_Obj according to |
---|
| 1678 | * the formatting instructions embedded in the format string. The |
---|
| 1679 | * formatting instructions are inspired by sprintf(). Returns TCL_OK when |
---|
| 1680 | * successful. If there's an error in the arguments, TCL_ERROR is |
---|
| 1681 | * returned, and an error message is written to the interp, if non-NULL. |
---|
| 1682 | * |
---|
| 1683 | * Results: |
---|
| 1684 | * A standard Tcl result. |
---|
| 1685 | * |
---|
| 1686 | * Side effects: |
---|
| 1687 | * None. |
---|
| 1688 | * |
---|
| 1689 | *---------------------------------------------------------------------- |
---|
| 1690 | */ |
---|
| 1691 | |
---|
| 1692 | int |
---|
| 1693 | Tcl_AppendFormatToObj( |
---|
| 1694 | Tcl_Interp *interp, |
---|
| 1695 | Tcl_Obj *appendObj, |
---|
| 1696 | const char *format, |
---|
| 1697 | int objc, |
---|
| 1698 | Tcl_Obj *const objv[]) |
---|
| 1699 | { |
---|
| 1700 | const char *span = format, *msg; |
---|
| 1701 | int numBytes = 0, objIndex = 0, gotXpg = 0, gotSequential = 0; |
---|
| 1702 | int originalLength; |
---|
| 1703 | static const char *mixedXPG = |
---|
| 1704 | "cannot mix \"%\" and \"%n$\" conversion specifiers"; |
---|
| 1705 | static const char *badIndex[2] = { |
---|
| 1706 | "not enough arguments for all format specifiers", |
---|
| 1707 | "\"%n$\" argument index out of range" |
---|
| 1708 | }; |
---|
| 1709 | |
---|
| 1710 | if (Tcl_IsShared(appendObj)) { |
---|
| 1711 | Tcl_Panic("%s called with shared object", "Tcl_AppendFormatToObj"); |
---|
| 1712 | } |
---|
| 1713 | TclGetStringFromObj(appendObj, &originalLength); |
---|
| 1714 | |
---|
| 1715 | /* |
---|
| 1716 | * Format string is NUL-terminated. |
---|
| 1717 | */ |
---|
| 1718 | |
---|
| 1719 | while (*format != '\0') { |
---|
| 1720 | char *end; |
---|
| 1721 | int gotMinus, gotHash, gotZero, gotSpace, gotPlus, sawFlag; |
---|
| 1722 | int width, gotPrecision, precision, useShort, useWide, useBig; |
---|
| 1723 | int newXpg, numChars, allocSegment = 0; |
---|
| 1724 | Tcl_Obj *segment; |
---|
| 1725 | Tcl_UniChar ch; |
---|
| 1726 | int step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1727 | |
---|
| 1728 | format += step; |
---|
| 1729 | if (ch != '%') { |
---|
| 1730 | numBytes += step; |
---|
| 1731 | continue; |
---|
| 1732 | } |
---|
| 1733 | if (numBytes) { |
---|
| 1734 | Tcl_AppendToObj(appendObj, span, numBytes); |
---|
| 1735 | numBytes = 0; |
---|
| 1736 | } |
---|
| 1737 | |
---|
| 1738 | /* |
---|
| 1739 | * Saw a % : process the format specifier. |
---|
| 1740 | * |
---|
| 1741 | * Step 0. Handle special case of escaped format marker (i.e., %%). |
---|
| 1742 | */ |
---|
| 1743 | |
---|
| 1744 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1745 | if (ch == '%') { |
---|
| 1746 | span = format; |
---|
| 1747 | numBytes = step; |
---|
| 1748 | format += step; |
---|
| 1749 | continue; |
---|
| 1750 | } |
---|
| 1751 | |
---|
| 1752 | /* |
---|
| 1753 | * Step 1. XPG3 position specifier |
---|
| 1754 | */ |
---|
| 1755 | |
---|
| 1756 | newXpg = 0; |
---|
| 1757 | if (isdigit(UCHAR(ch))) { |
---|
| 1758 | int position = strtoul(format, &end, 10); |
---|
| 1759 | if (*end == '$') { |
---|
| 1760 | newXpg = 1; |
---|
| 1761 | objIndex = position - 1; |
---|
| 1762 | format = end + 1; |
---|
| 1763 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1764 | } |
---|
| 1765 | } |
---|
| 1766 | if (newXpg) { |
---|
| 1767 | if (gotSequential) { |
---|
| 1768 | msg = mixedXPG; |
---|
| 1769 | goto errorMsg; |
---|
| 1770 | } |
---|
| 1771 | gotXpg = 1; |
---|
| 1772 | } else { |
---|
| 1773 | if (gotXpg) { |
---|
| 1774 | msg = mixedXPG; |
---|
| 1775 | goto errorMsg; |
---|
| 1776 | } |
---|
| 1777 | gotSequential = 1; |
---|
| 1778 | } |
---|
| 1779 | if ((objIndex < 0) || (objIndex >= objc)) { |
---|
| 1780 | msg = badIndex[gotXpg]; |
---|
| 1781 | goto errorMsg; |
---|
| 1782 | } |
---|
| 1783 | |
---|
| 1784 | /* |
---|
| 1785 | * Step 2. Set of flags. |
---|
| 1786 | */ |
---|
| 1787 | |
---|
| 1788 | gotMinus = gotHash = gotZero = gotSpace = gotPlus = 0; |
---|
| 1789 | sawFlag = 1; |
---|
| 1790 | do { |
---|
| 1791 | switch (ch) { |
---|
| 1792 | case '-': |
---|
| 1793 | gotMinus = 1; |
---|
| 1794 | break; |
---|
| 1795 | case '#': |
---|
| 1796 | gotHash = 1; |
---|
| 1797 | break; |
---|
| 1798 | case '0': |
---|
| 1799 | gotZero = 1; |
---|
| 1800 | break; |
---|
| 1801 | case ' ': |
---|
| 1802 | gotSpace = 1; |
---|
| 1803 | break; |
---|
| 1804 | case '+': |
---|
| 1805 | gotPlus = 1; |
---|
| 1806 | break; |
---|
| 1807 | default: |
---|
| 1808 | sawFlag = 0; |
---|
| 1809 | } |
---|
| 1810 | if (sawFlag) { |
---|
| 1811 | format += step; |
---|
| 1812 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1813 | } |
---|
| 1814 | } while (sawFlag); |
---|
| 1815 | |
---|
| 1816 | /* |
---|
| 1817 | * Step 3. Minimum field width. |
---|
| 1818 | */ |
---|
| 1819 | |
---|
| 1820 | width = 0; |
---|
| 1821 | if (isdigit(UCHAR(ch))) { |
---|
| 1822 | width = strtoul(format, &end, 10); |
---|
| 1823 | format = end; |
---|
| 1824 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1825 | } else if (ch == '*') { |
---|
| 1826 | if (objIndex >= objc - 1) { |
---|
| 1827 | msg = badIndex[gotXpg]; |
---|
| 1828 | goto errorMsg; |
---|
| 1829 | } |
---|
| 1830 | if (TclGetIntFromObj(interp, objv[objIndex], &width) != TCL_OK) { |
---|
| 1831 | goto error; |
---|
| 1832 | } |
---|
| 1833 | if (width < 0) { |
---|
| 1834 | width = -width; |
---|
| 1835 | gotMinus = 1; |
---|
| 1836 | } |
---|
| 1837 | objIndex++; |
---|
| 1838 | format += step; |
---|
| 1839 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1840 | } |
---|
| 1841 | |
---|
| 1842 | /* |
---|
| 1843 | * Step 4. Precision. |
---|
| 1844 | */ |
---|
| 1845 | |
---|
| 1846 | gotPrecision = precision = 0; |
---|
| 1847 | if (ch == '.') { |
---|
| 1848 | gotPrecision = 1; |
---|
| 1849 | format += step; |
---|
| 1850 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1851 | } |
---|
| 1852 | if (isdigit(UCHAR(ch))) { |
---|
| 1853 | precision = strtoul(format, &end, 10); |
---|
| 1854 | format = end; |
---|
| 1855 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1856 | } else if (ch == '*') { |
---|
| 1857 | if (objIndex >= objc - 1) { |
---|
| 1858 | msg = badIndex[gotXpg]; |
---|
| 1859 | goto errorMsg; |
---|
| 1860 | } |
---|
| 1861 | if (TclGetIntFromObj(interp, objv[objIndex], &precision) |
---|
| 1862 | != TCL_OK) { |
---|
| 1863 | goto error; |
---|
| 1864 | } |
---|
| 1865 | |
---|
| 1866 | /* |
---|
| 1867 | * TODO: Check this truncation logic. |
---|
| 1868 | */ |
---|
| 1869 | |
---|
| 1870 | if (precision < 0) { |
---|
| 1871 | precision = 0; |
---|
| 1872 | } |
---|
| 1873 | objIndex++; |
---|
| 1874 | format += step; |
---|
| 1875 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1876 | } |
---|
| 1877 | |
---|
| 1878 | /* |
---|
| 1879 | * Step 5. Length modifier. |
---|
| 1880 | */ |
---|
| 1881 | |
---|
| 1882 | useShort = useWide = useBig = 0; |
---|
| 1883 | if (ch == 'h') { |
---|
| 1884 | useShort = 1; |
---|
| 1885 | format += step; |
---|
| 1886 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1887 | } else if (ch == 'l') { |
---|
| 1888 | format += step; |
---|
| 1889 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1890 | if (ch == 'l') { |
---|
| 1891 | useBig = 1; |
---|
| 1892 | format += step; |
---|
| 1893 | step = Tcl_UtfToUniChar(format, &ch); |
---|
| 1894 | } else { |
---|
| 1895 | #ifndef TCL_WIDE_INT_IS_LONG |
---|
| 1896 | useWide = 1; |
---|
| 1897 | #endif |
---|
| 1898 | } |
---|
| 1899 | } |
---|
| 1900 | |
---|
| 1901 | format += step; |
---|
| 1902 | span = format; |
---|
| 1903 | |
---|
| 1904 | /* |
---|
| 1905 | * Step 6. The actual conversion character. |
---|
| 1906 | */ |
---|
| 1907 | |
---|
| 1908 | segment = objv[objIndex]; |
---|
| 1909 | if (ch == 'i') { |
---|
| 1910 | ch = 'd'; |
---|
| 1911 | } |
---|
| 1912 | switch (ch) { |
---|
| 1913 | case '\0': |
---|
| 1914 | msg = "format string ended in middle of field specifier"; |
---|
| 1915 | goto errorMsg; |
---|
| 1916 | case 's': { |
---|
| 1917 | numChars = Tcl_GetCharLength(segment); |
---|
| 1918 | if (gotPrecision && (precision < numChars)) { |
---|
| 1919 | segment = Tcl_GetRange(segment, 0, precision - 1); |
---|
| 1920 | Tcl_IncrRefCount(segment); |
---|
| 1921 | allocSegment = 1; |
---|
| 1922 | } |
---|
| 1923 | break; |
---|
| 1924 | } |
---|
| 1925 | case 'c': { |
---|
| 1926 | char buf[TCL_UTF_MAX]; |
---|
| 1927 | int code, length; |
---|
| 1928 | |
---|
| 1929 | if (TclGetIntFromObj(interp, segment, &code) != TCL_OK) { |
---|
| 1930 | goto error; |
---|
| 1931 | } |
---|
| 1932 | length = Tcl_UniCharToUtf(code, buf); |
---|
| 1933 | segment = Tcl_NewStringObj(buf, length); |
---|
| 1934 | Tcl_IncrRefCount(segment); |
---|
| 1935 | allocSegment = 1; |
---|
| 1936 | break; |
---|
| 1937 | } |
---|
| 1938 | |
---|
| 1939 | case 'u': |
---|
| 1940 | if (useBig) { |
---|
| 1941 | msg = "unsigned bignum format is invalid"; |
---|
| 1942 | goto errorMsg; |
---|
| 1943 | } |
---|
| 1944 | case 'd': |
---|
| 1945 | case 'o': |
---|
| 1946 | case 'x': |
---|
| 1947 | case 'X': { |
---|
| 1948 | short int s = 0; /* Silence compiler warning; only defined and |
---|
| 1949 | * used when useShort is true. */ |
---|
| 1950 | long l; |
---|
| 1951 | Tcl_WideInt w; |
---|
| 1952 | mp_int big; |
---|
| 1953 | int isNegative = 0; |
---|
| 1954 | |
---|
| 1955 | if (useBig) { |
---|
| 1956 | if (Tcl_GetBignumFromObj(interp, segment, &big) != TCL_OK) { |
---|
| 1957 | goto error; |
---|
| 1958 | } |
---|
| 1959 | isNegative = (mp_cmp_d(&big, 0) == MP_LT); |
---|
| 1960 | } else if (useWide) { |
---|
| 1961 | if (Tcl_GetWideIntFromObj(NULL, segment, &w) != TCL_OK) { |
---|
| 1962 | Tcl_Obj *objPtr; |
---|
| 1963 | |
---|
| 1964 | if (Tcl_GetBignumFromObj(interp,segment,&big) != TCL_OK) { |
---|
| 1965 | goto error; |
---|
| 1966 | } |
---|
| 1967 | mp_mod_2d(&big, (int) CHAR_BIT*sizeof(Tcl_WideInt), &big); |
---|
| 1968 | objPtr = Tcl_NewBignumObj(&big); |
---|
| 1969 | Tcl_IncrRefCount(objPtr); |
---|
| 1970 | Tcl_GetWideIntFromObj(NULL, objPtr, &w); |
---|
| 1971 | Tcl_DecrRefCount(objPtr); |
---|
| 1972 | } |
---|
| 1973 | isNegative = (w < (Tcl_WideInt)0); |
---|
| 1974 | } else if (TclGetLongFromObj(NULL, segment, &l) != TCL_OK) { |
---|
| 1975 | if (Tcl_GetWideIntFromObj(NULL, segment, &w) != TCL_OK) { |
---|
| 1976 | Tcl_Obj *objPtr; |
---|
| 1977 | |
---|
| 1978 | if (Tcl_GetBignumFromObj(interp,segment,&big) != TCL_OK) { |
---|
| 1979 | goto error; |
---|
| 1980 | } |
---|
| 1981 | mp_mod_2d(&big, (int) CHAR_BIT * sizeof(long), &big); |
---|
| 1982 | objPtr = Tcl_NewBignumObj(&big); |
---|
| 1983 | Tcl_IncrRefCount(objPtr); |
---|
| 1984 | TclGetLongFromObj(NULL, objPtr, &l); |
---|
| 1985 | Tcl_DecrRefCount(objPtr); |
---|
| 1986 | } else { |
---|
| 1987 | l = Tcl_WideAsLong(w); |
---|
| 1988 | } |
---|
| 1989 | if (useShort) { |
---|
| 1990 | s = (short int) l; |
---|
| 1991 | isNegative = (s < (short int)0); |
---|
| 1992 | } else { |
---|
| 1993 | isNegative = (l < (long)0); |
---|
| 1994 | } |
---|
| 1995 | } else if (useShort) { |
---|
| 1996 | s = (short int) l; |
---|
| 1997 | isNegative = (s < (short int)0); |
---|
| 1998 | } else { |
---|
| 1999 | isNegative = (l < (long)0); |
---|
| 2000 | } |
---|
| 2001 | |
---|
| 2002 | segment = Tcl_NewObj(); |
---|
| 2003 | allocSegment = 1; |
---|
| 2004 | Tcl_IncrRefCount(segment); |
---|
| 2005 | |
---|
| 2006 | if ((isNegative || gotPlus) && (useBig || (ch == 'd'))) { |
---|
| 2007 | Tcl_AppendToObj(segment, (isNegative ? "-" : "+"), 1); |
---|
| 2008 | } |
---|
| 2009 | |
---|
| 2010 | if (gotHash) { |
---|
| 2011 | switch (ch) { |
---|
| 2012 | case 'o': |
---|
| 2013 | Tcl_AppendToObj(segment, "0", 1); |
---|
| 2014 | precision--; |
---|
| 2015 | break; |
---|
| 2016 | case 'x': |
---|
| 2017 | case 'X': |
---|
| 2018 | Tcl_AppendToObj(segment, "0x", 2); |
---|
| 2019 | break; |
---|
| 2020 | } |
---|
| 2021 | } |
---|
| 2022 | |
---|
| 2023 | switch (ch) { |
---|
| 2024 | case 'd': { |
---|
| 2025 | int length; |
---|
| 2026 | Tcl_Obj *pure; |
---|
| 2027 | const char *bytes; |
---|
| 2028 | |
---|
| 2029 | if (useShort) { |
---|
| 2030 | pure = Tcl_NewIntObj((int)(s)); |
---|
| 2031 | } else if (useWide) { |
---|
| 2032 | pure = Tcl_NewWideIntObj(w); |
---|
| 2033 | } else if (useBig) { |
---|
| 2034 | pure = Tcl_NewBignumObj(&big); |
---|
| 2035 | } else { |
---|
| 2036 | pure = Tcl_NewLongObj(l); |
---|
| 2037 | } |
---|
| 2038 | Tcl_IncrRefCount(pure); |
---|
| 2039 | bytes = TclGetStringFromObj(pure, &length); |
---|
| 2040 | |
---|
| 2041 | /* |
---|
| 2042 | * Already did the sign above. |
---|
| 2043 | */ |
---|
| 2044 | |
---|
| 2045 | if (*bytes == '-') { |
---|
| 2046 | length--; |
---|
| 2047 | bytes++; |
---|
| 2048 | } |
---|
| 2049 | |
---|
| 2050 | /* |
---|
| 2051 | * Canonical decimal string reps for integers are composed |
---|
| 2052 | * entirely of one-byte encoded characters, so "length" is the |
---|
| 2053 | * number of chars. |
---|
| 2054 | */ |
---|
| 2055 | |
---|
| 2056 | if (gotPrecision) { |
---|
| 2057 | while (length < precision) { |
---|
| 2058 | Tcl_AppendToObj(segment, "0", 1); |
---|
| 2059 | length++; |
---|
| 2060 | } |
---|
| 2061 | gotZero = 0; |
---|
| 2062 | } |
---|
| 2063 | if (gotZero) { |
---|
| 2064 | length += Tcl_GetCharLength(segment); |
---|
| 2065 | while (length < width) { |
---|
| 2066 | Tcl_AppendToObj(segment, "0", 1); |
---|
| 2067 | length++; |
---|
| 2068 | } |
---|
| 2069 | } |
---|
| 2070 | Tcl_AppendToObj(segment, bytes, -1); |
---|
| 2071 | Tcl_DecrRefCount(pure); |
---|
| 2072 | break; |
---|
| 2073 | } |
---|
| 2074 | |
---|
| 2075 | case 'u': |
---|
| 2076 | case 'o': |
---|
| 2077 | case 'x': |
---|
| 2078 | case 'X': { |
---|
| 2079 | Tcl_WideUInt bits = (Tcl_WideUInt)0; |
---|
| 2080 | int length, numBits = 4, numDigits = 0, base = 16; |
---|
| 2081 | int index = 0, shift = 0; |
---|
| 2082 | Tcl_Obj *pure; |
---|
| 2083 | char *bytes; |
---|
| 2084 | |
---|
| 2085 | if (ch == 'u') { |
---|
| 2086 | base = 10; |
---|
| 2087 | } |
---|
| 2088 | if (ch == 'o') { |
---|
| 2089 | base = 8; |
---|
| 2090 | numBits = 3; |
---|
| 2091 | } |
---|
| 2092 | if (useShort) { |
---|
| 2093 | unsigned short int us = (unsigned short int) s; |
---|
| 2094 | |
---|
| 2095 | bits = (Tcl_WideUInt) us; |
---|
| 2096 | while (us) { |
---|
| 2097 | numDigits++; |
---|
| 2098 | us /= base; |
---|
| 2099 | } |
---|
| 2100 | } else if (useWide) { |
---|
| 2101 | Tcl_WideUInt uw = (Tcl_WideUInt) w; |
---|
| 2102 | |
---|
| 2103 | bits = uw; |
---|
| 2104 | while (uw) { |
---|
| 2105 | numDigits++; |
---|
| 2106 | uw /= base; |
---|
| 2107 | } |
---|
| 2108 | } else if (useBig && big.used) { |
---|
| 2109 | int leftover = (big.used * DIGIT_BIT) % numBits; |
---|
| 2110 | mp_digit mask = (~(mp_digit)0) << (DIGIT_BIT-leftover); |
---|
| 2111 | |
---|
| 2112 | numDigits = 1 + ((big.used * DIGIT_BIT) / numBits); |
---|
| 2113 | while ((mask & big.dp[big.used-1]) == 0) { |
---|
| 2114 | numDigits--; |
---|
| 2115 | mask >>= numBits; |
---|
| 2116 | } |
---|
| 2117 | } else if (!useBig) { |
---|
| 2118 | unsigned long int ul = (unsigned long int) l; |
---|
| 2119 | |
---|
| 2120 | bits = (Tcl_WideUInt) ul; |
---|
| 2121 | while (ul) { |
---|
| 2122 | numDigits++; |
---|
| 2123 | ul /= base; |
---|
| 2124 | } |
---|
| 2125 | } |
---|
| 2126 | |
---|
| 2127 | /* |
---|
| 2128 | * Need to be sure zero becomes "0", not "". |
---|
| 2129 | */ |
---|
| 2130 | |
---|
| 2131 | if ((numDigits == 0) && !((ch == 'o') && gotHash)) { |
---|
| 2132 | numDigits = 1; |
---|
| 2133 | } |
---|
| 2134 | pure = Tcl_NewObj(); |
---|
| 2135 | Tcl_SetObjLength(pure, numDigits); |
---|
| 2136 | bytes = TclGetString(pure); |
---|
| 2137 | length = numDigits; |
---|
| 2138 | while (numDigits--) { |
---|
| 2139 | int digitOffset; |
---|
| 2140 | |
---|
| 2141 | if (useBig && big.used) { |
---|
| 2142 | if ((size_t) shift < |
---|
| 2143 | CHAR_BIT*sizeof(Tcl_WideUInt) - DIGIT_BIT) { |
---|
| 2144 | bits |= (((Tcl_WideUInt)big.dp[index++]) <<shift); |
---|
| 2145 | shift += DIGIT_BIT; |
---|
| 2146 | } |
---|
| 2147 | shift -= numBits; |
---|
| 2148 | } |
---|
| 2149 | digitOffset = (int) (bits % base); |
---|
| 2150 | if (digitOffset > 9) { |
---|
| 2151 | bytes[numDigits] = 'a' + digitOffset - 10; |
---|
| 2152 | } else { |
---|
| 2153 | bytes[numDigits] = '0' + digitOffset; |
---|
| 2154 | } |
---|
| 2155 | bits /= base; |
---|
| 2156 | } |
---|
| 2157 | if (useBig) { |
---|
| 2158 | mp_clear(&big); |
---|
| 2159 | } |
---|
| 2160 | if (gotPrecision) { |
---|
| 2161 | while (length < precision) { |
---|
| 2162 | Tcl_AppendToObj(segment, "0", 1); |
---|
| 2163 | length++; |
---|
| 2164 | } |
---|
| 2165 | gotZero = 0; |
---|
| 2166 | } |
---|
| 2167 | if (gotZero) { |
---|
| 2168 | length += Tcl_GetCharLength(segment); |
---|
| 2169 | while (length < width) { |
---|
| 2170 | Tcl_AppendToObj(segment, "0", 1); |
---|
| 2171 | length++; |
---|
| 2172 | } |
---|
| 2173 | } |
---|
| 2174 | Tcl_AppendObjToObj(segment, pure); |
---|
| 2175 | Tcl_DecrRefCount(pure); |
---|
| 2176 | break; |
---|
| 2177 | } |
---|
| 2178 | |
---|
| 2179 | } |
---|
| 2180 | break; |
---|
| 2181 | } |
---|
| 2182 | |
---|
| 2183 | case 'e': |
---|
| 2184 | case 'E': |
---|
| 2185 | case 'f': |
---|
| 2186 | case 'g': |
---|
| 2187 | case 'G': { |
---|
| 2188 | #define MAX_FLOAT_SIZE 320 |
---|
| 2189 | char spec[2*TCL_INTEGER_SPACE + 9], *p = spec; |
---|
| 2190 | double d; |
---|
| 2191 | int length = MAX_FLOAT_SIZE; |
---|
| 2192 | char *bytes; |
---|
| 2193 | |
---|
| 2194 | if (Tcl_GetDoubleFromObj(interp, segment, &d) != TCL_OK) { |
---|
| 2195 | /* TODO: Figure out ACCEPT_NAN here */ |
---|
| 2196 | goto error; |
---|
| 2197 | } |
---|
| 2198 | *p++ = '%'; |
---|
| 2199 | if (gotMinus) { |
---|
| 2200 | *p++ = '-'; |
---|
| 2201 | } |
---|
| 2202 | if (gotHash) { |
---|
| 2203 | *p++ = '#'; |
---|
| 2204 | } |
---|
| 2205 | if (gotZero) { |
---|
| 2206 | *p++ = '0'; |
---|
| 2207 | } |
---|
| 2208 | if (gotSpace) { |
---|
| 2209 | *p++ = ' '; |
---|
| 2210 | } |
---|
| 2211 | if (gotPlus) { |
---|
| 2212 | *p++ = '+'; |
---|
| 2213 | } |
---|
| 2214 | if (width) { |
---|
| 2215 | p += sprintf(p, "%d", width); |
---|
| 2216 | } |
---|
| 2217 | if (gotPrecision) { |
---|
| 2218 | *p++ = '.'; |
---|
| 2219 | p += sprintf(p, "%d", precision); |
---|
| 2220 | length += precision; |
---|
| 2221 | } |
---|
| 2222 | |
---|
| 2223 | /* |
---|
| 2224 | * Don't pass length modifiers! |
---|
| 2225 | */ |
---|
| 2226 | |
---|
| 2227 | *p++ = (char) ch; |
---|
| 2228 | *p = '\0'; |
---|
| 2229 | |
---|
| 2230 | segment = Tcl_NewObj(); |
---|
| 2231 | allocSegment = 1; |
---|
| 2232 | Tcl_SetObjLength(segment, length); |
---|
| 2233 | bytes = TclGetString(segment); |
---|
| 2234 | Tcl_SetObjLength(segment, sprintf(bytes, spec, d)); |
---|
| 2235 | break; |
---|
| 2236 | } |
---|
| 2237 | default: |
---|
| 2238 | if (interp != NULL) { |
---|
| 2239 | char buf[40]; |
---|
| 2240 | |
---|
| 2241 | sprintf(buf, "bad field specifier \"%c\"", ch); |
---|
| 2242 | Tcl_SetObjResult(interp, Tcl_NewStringObj(buf, -1)); |
---|
| 2243 | } |
---|
| 2244 | goto error; |
---|
| 2245 | } |
---|
| 2246 | |
---|
| 2247 | switch (ch) { |
---|
| 2248 | case 'E': |
---|
| 2249 | case 'G': |
---|
| 2250 | case 'X': { |
---|
| 2251 | Tcl_SetObjLength(segment, Tcl_UtfToUpper(TclGetString(segment))); |
---|
| 2252 | } |
---|
| 2253 | } |
---|
| 2254 | |
---|
| 2255 | numChars = Tcl_GetCharLength(segment); |
---|
| 2256 | if (!gotMinus) { |
---|
| 2257 | while (numChars < width) { |
---|
| 2258 | Tcl_AppendToObj(appendObj, (gotZero ? "0" : " "), 1); |
---|
| 2259 | numChars++; |
---|
| 2260 | } |
---|
| 2261 | } |
---|
| 2262 | Tcl_AppendObjToObj(appendObj, segment); |
---|
| 2263 | if (allocSegment) { |
---|
| 2264 | Tcl_DecrRefCount(segment); |
---|
| 2265 | } |
---|
| 2266 | while (numChars < width) { |
---|
| 2267 | Tcl_AppendToObj(appendObj, (gotZero ? "0" : " "), 1); |
---|
| 2268 | numChars++; |
---|
| 2269 | } |
---|
| 2270 | |
---|
| 2271 | objIndex += gotSequential; |
---|
| 2272 | } |
---|
| 2273 | if (numBytes) { |
---|
| 2274 | Tcl_AppendToObj(appendObj, span, numBytes); |
---|
| 2275 | numBytes = 0; |
---|
| 2276 | } |
---|
| 2277 | |
---|
| 2278 | return TCL_OK; |
---|
| 2279 | |
---|
| 2280 | errorMsg: |
---|
| 2281 | if (interp != NULL) { |
---|
| 2282 | Tcl_SetObjResult(interp, Tcl_NewStringObj(msg, -1)); |
---|
| 2283 | } |
---|
| 2284 | error: |
---|
| 2285 | Tcl_SetObjLength(appendObj, originalLength); |
---|
| 2286 | return TCL_ERROR; |
---|
| 2287 | } |
---|
| 2288 | |
---|
| 2289 | /* |
---|
| 2290 | *--------------------------------------------------------------------------- |
---|
| 2291 | * |
---|
| 2292 | * Tcl_Format-- |
---|
| 2293 | * |
---|
| 2294 | * Results: |
---|
| 2295 | * A refcount zero Tcl_Obj. |
---|
| 2296 | * |
---|
| 2297 | * Side effects: |
---|
| 2298 | * None. |
---|
| 2299 | * |
---|
| 2300 | *--------------------------------------------------------------------------- |
---|
| 2301 | */ |
---|
| 2302 | |
---|
| 2303 | Tcl_Obj * |
---|
| 2304 | Tcl_Format( |
---|
| 2305 | Tcl_Interp *interp, |
---|
| 2306 | const char *format, |
---|
| 2307 | int objc, |
---|
| 2308 | Tcl_Obj *const objv[]) |
---|
| 2309 | { |
---|
| 2310 | int result; |
---|
| 2311 | Tcl_Obj *objPtr = Tcl_NewObj(); |
---|
| 2312 | result = Tcl_AppendFormatToObj(interp, objPtr, format, objc, objv); |
---|
| 2313 | if (result != TCL_OK) { |
---|
| 2314 | Tcl_DecrRefCount(objPtr); |
---|
| 2315 | return NULL; |
---|
| 2316 | } |
---|
| 2317 | return objPtr; |
---|
| 2318 | } |
---|
| 2319 | |
---|
| 2320 | /* |
---|
| 2321 | *--------------------------------------------------------------------------- |
---|
| 2322 | * |
---|
| 2323 | * AppendPrintfToObjVA -- |
---|
| 2324 | * |
---|
| 2325 | * Results: |
---|
| 2326 | * |
---|
| 2327 | * Side effects: |
---|
| 2328 | * |
---|
| 2329 | *--------------------------------------------------------------------------- |
---|
| 2330 | */ |
---|
| 2331 | |
---|
| 2332 | static void |
---|
| 2333 | AppendPrintfToObjVA( |
---|
| 2334 | Tcl_Obj *objPtr, |
---|
| 2335 | const char *format, |
---|
| 2336 | va_list argList) |
---|
| 2337 | { |
---|
| 2338 | int code, objc; |
---|
| 2339 | Tcl_Obj **objv, *list = Tcl_NewObj(); |
---|
| 2340 | const char *p; |
---|
| 2341 | char *end; |
---|
| 2342 | |
---|
| 2343 | p = format; |
---|
| 2344 | Tcl_IncrRefCount(list); |
---|
| 2345 | while (*p != '\0') { |
---|
| 2346 | int size = 0, seekingConversion = 1, gotPrecision = 0; |
---|
| 2347 | int lastNum = -1; |
---|
| 2348 | |
---|
| 2349 | if (*p++ != '%') { |
---|
| 2350 | continue; |
---|
| 2351 | } |
---|
| 2352 | if (*p == '%') { |
---|
| 2353 | p++; |
---|
| 2354 | continue; |
---|
| 2355 | } |
---|
| 2356 | do { |
---|
| 2357 | switch (*p) { |
---|
| 2358 | |
---|
| 2359 | case '\0': |
---|
| 2360 | seekingConversion = 0; |
---|
| 2361 | break; |
---|
| 2362 | case 's': { |
---|
| 2363 | const char *q, *end, *bytes = va_arg(argList, char *); |
---|
| 2364 | seekingConversion = 0; |
---|
| 2365 | |
---|
| 2366 | /* |
---|
| 2367 | * The buffer to copy characters from starts at bytes and ends |
---|
| 2368 | * at either the first NUL byte, or after lastNum bytes, when |
---|
| 2369 | * caller has indicated a limit. |
---|
| 2370 | */ |
---|
| 2371 | |
---|
| 2372 | end = bytes; |
---|
| 2373 | while ((!gotPrecision || lastNum--) && (*end != '\0')) { |
---|
| 2374 | end++; |
---|
| 2375 | } |
---|
| 2376 | |
---|
| 2377 | /* |
---|
| 2378 | * Within that buffer, we trim both ends if needed so that we |
---|
| 2379 | * copy only whole characters, and avoid copying any partial |
---|
| 2380 | * multi-byte characters. |
---|
| 2381 | */ |
---|
| 2382 | |
---|
| 2383 | q = Tcl_UtfPrev(end, bytes); |
---|
| 2384 | if (!Tcl_UtfCharComplete(q, (int)(end - q))) { |
---|
| 2385 | end = q; |
---|
| 2386 | } |
---|
| 2387 | |
---|
| 2388 | q = bytes + TCL_UTF_MAX; |
---|
| 2389 | while ((bytes < end) && (bytes < q) |
---|
| 2390 | && ((*bytes & 0xC0) == 0x80)) { |
---|
| 2391 | bytes++; |
---|
| 2392 | } |
---|
| 2393 | |
---|
| 2394 | Tcl_ListObjAppendElement(NULL, list, |
---|
| 2395 | Tcl_NewStringObj(bytes , (int)(end - bytes))); |
---|
| 2396 | |
---|
| 2397 | break; |
---|
| 2398 | } |
---|
| 2399 | case 'c': |
---|
| 2400 | case 'i': |
---|
| 2401 | case 'u': |
---|
| 2402 | case 'd': |
---|
| 2403 | case 'o': |
---|
| 2404 | case 'x': |
---|
| 2405 | case 'X': |
---|
| 2406 | seekingConversion = 0; |
---|
| 2407 | switch (size) { |
---|
| 2408 | case -1: |
---|
| 2409 | case 0: |
---|
| 2410 | Tcl_ListObjAppendElement(NULL, list, Tcl_NewLongObj( |
---|
| 2411 | (long int)va_arg(argList, int))); |
---|
| 2412 | break; |
---|
| 2413 | case 1: |
---|
| 2414 | Tcl_ListObjAppendElement(NULL, list, Tcl_NewLongObj( |
---|
| 2415 | va_arg(argList, long int))); |
---|
| 2416 | break; |
---|
| 2417 | } |
---|
| 2418 | break; |
---|
| 2419 | case 'e': |
---|
| 2420 | case 'E': |
---|
| 2421 | case 'f': |
---|
| 2422 | case 'g': |
---|
| 2423 | case 'G': |
---|
| 2424 | Tcl_ListObjAppendElement(NULL, list, Tcl_NewDoubleObj( |
---|
| 2425 | va_arg(argList, double))); |
---|
| 2426 | seekingConversion = 0; |
---|
| 2427 | break; |
---|
| 2428 | case '*': |
---|
| 2429 | lastNum = (int)va_arg(argList, int); |
---|
| 2430 | Tcl_ListObjAppendElement(NULL, list, Tcl_NewIntObj(lastNum)); |
---|
| 2431 | p++; |
---|
| 2432 | break; |
---|
| 2433 | case '0': case '1': case '2': case '3': case '4': |
---|
| 2434 | case '5': case '6': case '7': case '8': case '9': |
---|
| 2435 | lastNum = (int) strtoul(p, &end, 10); |
---|
| 2436 | p = end; |
---|
| 2437 | break; |
---|
| 2438 | case '.': |
---|
| 2439 | gotPrecision = 1; |
---|
| 2440 | p++; |
---|
| 2441 | break; |
---|
| 2442 | /* TODO: support for wide (and bignum?) arguments */ |
---|
| 2443 | case 'l': |
---|
| 2444 | size = 1; |
---|
| 2445 | p++; |
---|
| 2446 | break; |
---|
| 2447 | case 'h': |
---|
| 2448 | size = -1; |
---|
| 2449 | default: |
---|
| 2450 | p++; |
---|
| 2451 | } |
---|
| 2452 | } while (seekingConversion); |
---|
| 2453 | } |
---|
| 2454 | TclListObjGetElements(NULL, list, &objc, &objv); |
---|
| 2455 | code = Tcl_AppendFormatToObj(NULL, objPtr, format, objc, objv); |
---|
| 2456 | if (code != TCL_OK) { |
---|
| 2457 | Tcl_AppendPrintfToObj(objPtr, |
---|
| 2458 | "Unable to format \"%s\" with supplied arguments: %s", |
---|
| 2459 | format, Tcl_GetString(list)); |
---|
| 2460 | } |
---|
| 2461 | Tcl_DecrRefCount(list); |
---|
| 2462 | } |
---|
| 2463 | |
---|
| 2464 | /* |
---|
| 2465 | *--------------------------------------------------------------------------- |
---|
| 2466 | * |
---|
| 2467 | * Tcl_AppendPrintfToObj -- |
---|
| 2468 | * |
---|
| 2469 | * Results: |
---|
| 2470 | * A standard Tcl result. |
---|
| 2471 | * |
---|
| 2472 | * Side effects: |
---|
| 2473 | * None. |
---|
| 2474 | * |
---|
| 2475 | *--------------------------------------------------------------------------- |
---|
| 2476 | */ |
---|
| 2477 | |
---|
| 2478 | void |
---|
| 2479 | Tcl_AppendPrintfToObj( |
---|
| 2480 | Tcl_Obj *objPtr, |
---|
| 2481 | const char *format, |
---|
| 2482 | ...) |
---|
| 2483 | { |
---|
| 2484 | va_list argList; |
---|
| 2485 | |
---|
| 2486 | va_start(argList, format); |
---|
| 2487 | AppendPrintfToObjVA(objPtr, format, argList); |
---|
| 2488 | va_end(argList); |
---|
| 2489 | } |
---|
| 2490 | |
---|
| 2491 | /* |
---|
| 2492 | *--------------------------------------------------------------------------- |
---|
| 2493 | * |
---|
| 2494 | * Tcl_ObjPrintf -- |
---|
| 2495 | * |
---|
| 2496 | * Results: |
---|
| 2497 | * A refcount zero Tcl_Obj. |
---|
| 2498 | * |
---|
| 2499 | * Side effects: |
---|
| 2500 | * None. |
---|
| 2501 | * |
---|
| 2502 | *--------------------------------------------------------------------------- |
---|
| 2503 | */ |
---|
| 2504 | |
---|
| 2505 | Tcl_Obj * |
---|
| 2506 | Tcl_ObjPrintf( |
---|
| 2507 | const char *format, |
---|
| 2508 | ...) |
---|
| 2509 | { |
---|
| 2510 | va_list argList; |
---|
| 2511 | Tcl_Obj *objPtr = Tcl_NewObj(); |
---|
| 2512 | |
---|
| 2513 | va_start(argList, format); |
---|
| 2514 | AppendPrintfToObjVA(objPtr, format, argList); |
---|
| 2515 | va_end(argList); |
---|
| 2516 | return objPtr; |
---|
| 2517 | } |
---|
| 2518 | |
---|
| 2519 | /* |
---|
| 2520 | *--------------------------------------------------------------------------- |
---|
| 2521 | * |
---|
| 2522 | * TclStringObjReverse -- |
---|
| 2523 | * |
---|
| 2524 | * Implements the [string reverse] operation. |
---|
| 2525 | * |
---|
| 2526 | * Results: |
---|
| 2527 | * An unshared Tcl value which is the [string reverse] of the argument |
---|
| 2528 | * supplied. When sharing rules permit, the returned value might be |
---|
| 2529 | * the argument with modifications done in place. |
---|
| 2530 | * |
---|
| 2531 | * Side effects: |
---|
| 2532 | * May allocate a new Tcl_Obj. |
---|
| 2533 | * |
---|
| 2534 | *--------------------------------------------------------------------------- |
---|
| 2535 | */ |
---|
| 2536 | |
---|
| 2537 | Tcl_Obj * |
---|
| 2538 | TclStringObjReverse( |
---|
| 2539 | Tcl_Obj *objPtr) |
---|
| 2540 | { |
---|
| 2541 | String *stringPtr; |
---|
| 2542 | int numChars = Tcl_GetCharLength(objPtr); |
---|
| 2543 | int i = 0, lastCharIdx = numChars - 1; |
---|
| 2544 | char *bytes; |
---|
| 2545 | |
---|
| 2546 | if (numChars <= 1) { |
---|
| 2547 | return objPtr; |
---|
| 2548 | } |
---|
| 2549 | |
---|
| 2550 | stringPtr = GET_STRING(objPtr); |
---|
| 2551 | if (stringPtr->hasUnicode) { |
---|
| 2552 | Tcl_UniChar *source = stringPtr->unicode; |
---|
| 2553 | |
---|
| 2554 | if (Tcl_IsShared(objPtr)) { |
---|
| 2555 | Tcl_UniChar *dest, ch = 0; |
---|
| 2556 | |
---|
| 2557 | /* |
---|
| 2558 | * Create a non-empty, pure unicode value, so we can coax |
---|
| 2559 | * Tcl_SetObjLength into growing the unicode rep buffer. |
---|
| 2560 | */ |
---|
| 2561 | |
---|
| 2562 | Tcl_Obj *resultPtr = Tcl_NewUnicodeObj(&ch, 1); |
---|
| 2563 | Tcl_SetObjLength(resultPtr, numChars); |
---|
| 2564 | dest = Tcl_GetUnicode(resultPtr); |
---|
| 2565 | |
---|
| 2566 | while (i < numChars) { |
---|
| 2567 | dest[i++] = source[lastCharIdx--]; |
---|
| 2568 | } |
---|
| 2569 | return resultPtr; |
---|
| 2570 | } |
---|
| 2571 | |
---|
| 2572 | while (i < lastCharIdx) { |
---|
| 2573 | Tcl_UniChar tmp = source[lastCharIdx]; |
---|
| 2574 | source[lastCharIdx--] = source[i]; |
---|
| 2575 | source[i++] = tmp; |
---|
| 2576 | } |
---|
| 2577 | Tcl_InvalidateStringRep(objPtr); |
---|
| 2578 | return objPtr; |
---|
| 2579 | } |
---|
| 2580 | |
---|
| 2581 | bytes = TclGetString(objPtr); |
---|
| 2582 | if (Tcl_IsShared(objPtr)) { |
---|
| 2583 | char *dest; |
---|
| 2584 | Tcl_Obj *resultPtr = Tcl_NewObj(); |
---|
| 2585 | Tcl_SetObjLength(resultPtr, numChars); |
---|
| 2586 | dest = TclGetString(resultPtr); |
---|
| 2587 | while (i < numChars) { |
---|
| 2588 | dest[i++] = bytes[lastCharIdx--]; |
---|
| 2589 | } |
---|
| 2590 | return resultPtr; |
---|
| 2591 | } |
---|
| 2592 | |
---|
| 2593 | while (i < lastCharIdx) { |
---|
| 2594 | char tmp = bytes[lastCharIdx]; |
---|
| 2595 | bytes[lastCharIdx--] = bytes[i]; |
---|
| 2596 | bytes[i++] = tmp; |
---|
| 2597 | } |
---|
| 2598 | return objPtr; |
---|
| 2599 | } |
---|
| 2600 | |
---|
| 2601 | /* |
---|
| 2602 | *--------------------------------------------------------------------------- |
---|
| 2603 | * |
---|
| 2604 | * FillUnicodeRep -- |
---|
| 2605 | * |
---|
| 2606 | * Populate the Unicode internal rep with the Unicode form of its string |
---|
| 2607 | * rep. The object must alread have a "String" internal rep. |
---|
| 2608 | * |
---|
| 2609 | * Results: |
---|
| 2610 | * None. |
---|
| 2611 | * |
---|
| 2612 | * Side effects: |
---|
| 2613 | * Reallocates the String internal rep. |
---|
| 2614 | * |
---|
| 2615 | *--------------------------------------------------------------------------- |
---|
| 2616 | */ |
---|
| 2617 | |
---|
| 2618 | static void |
---|
| 2619 | FillUnicodeRep( |
---|
| 2620 | Tcl_Obj *objPtr) /* The object in which to fill the unicode |
---|
| 2621 | * rep. */ |
---|
| 2622 | { |
---|
| 2623 | String *stringPtr; |
---|
| 2624 | size_t uallocated; |
---|
| 2625 | char *srcEnd, *src = objPtr->bytes; |
---|
| 2626 | Tcl_UniChar *dst; |
---|
| 2627 | |
---|
| 2628 | stringPtr = GET_STRING(objPtr); |
---|
| 2629 | if (stringPtr->numChars == -1) { |
---|
| 2630 | stringPtr->numChars = Tcl_NumUtfChars(src, objPtr->length); |
---|
| 2631 | } |
---|
| 2632 | stringPtr->hasUnicode = (stringPtr->numChars > 0); |
---|
| 2633 | |
---|
| 2634 | uallocated = STRING_UALLOC(stringPtr->numChars); |
---|
| 2635 | if (uallocated > stringPtr->uallocated) { |
---|
| 2636 | /* |
---|
| 2637 | * If not enough space has been allocated for the unicode rep, |
---|
| 2638 | * reallocate the internal rep object. |
---|
| 2639 | * |
---|
| 2640 | * There isn't currently enough space in the Unicode representation so |
---|
| 2641 | * allocate additional space. If the current Unicode representation |
---|
| 2642 | * isn't empty (i.e. it looks like we've done some appends) then |
---|
| 2643 | * overallocate the space so that we won't have to do as much |
---|
| 2644 | * reallocation in the future. |
---|
| 2645 | */ |
---|
| 2646 | |
---|
| 2647 | if (stringPtr->uallocated > 0) { |
---|
| 2648 | uallocated *= 2; |
---|
| 2649 | } |
---|
| 2650 | stringPtr = (String *) ckrealloc((char*) stringPtr, |
---|
| 2651 | STRING_SIZE(uallocated)); |
---|
| 2652 | stringPtr->uallocated = uallocated; |
---|
| 2653 | } |
---|
| 2654 | |
---|
| 2655 | /* |
---|
| 2656 | * Convert src to Unicode and store the coverted data in "unicode". |
---|
| 2657 | */ |
---|
| 2658 | |
---|
| 2659 | srcEnd = src + objPtr->length; |
---|
| 2660 | for (dst = stringPtr->unicode; src < srcEnd; dst++) { |
---|
| 2661 | src += TclUtfToUniChar(src, dst); |
---|
| 2662 | } |
---|
| 2663 | *dst = 0; |
---|
| 2664 | |
---|
| 2665 | SET_STRING(objPtr, stringPtr); |
---|
| 2666 | } |
---|
| 2667 | |
---|
| 2668 | /* |
---|
| 2669 | *---------------------------------------------------------------------- |
---|
| 2670 | * |
---|
| 2671 | * DupStringInternalRep -- |
---|
| 2672 | * |
---|
| 2673 | * Initialize the internal representation of a new Tcl_Obj to a copy of |
---|
| 2674 | * the internal representation of an existing string object. |
---|
| 2675 | * |
---|
| 2676 | * Results: |
---|
| 2677 | * None. |
---|
| 2678 | * |
---|
| 2679 | * Side effects: |
---|
| 2680 | * copyPtr's internal rep is set to a copy of srcPtr's internal |
---|
| 2681 | * representation. |
---|
| 2682 | * |
---|
| 2683 | *---------------------------------------------------------------------- |
---|
| 2684 | */ |
---|
| 2685 | |
---|
| 2686 | static void |
---|
| 2687 | DupStringInternalRep( |
---|
| 2688 | register Tcl_Obj *srcPtr, /* Object with internal rep to copy. Must have |
---|
| 2689 | * an internal rep of type "String". */ |
---|
| 2690 | register Tcl_Obj *copyPtr) /* Object with internal rep to set. Must not |
---|
| 2691 | * currently have an internal rep.*/ |
---|
| 2692 | { |
---|
| 2693 | String *srcStringPtr = GET_STRING(srcPtr); |
---|
| 2694 | String *copyStringPtr = NULL; |
---|
| 2695 | |
---|
| 2696 | /* |
---|
| 2697 | * If the src obj is a string of 1-byte Utf chars, then copy the string |
---|
| 2698 | * rep of the source object and create an "empty" Unicode internal rep for |
---|
| 2699 | * the new object. Otherwise, copy Unicode internal rep, and invalidate |
---|
| 2700 | * the string rep of the new object. |
---|
| 2701 | */ |
---|
| 2702 | |
---|
| 2703 | if (srcStringPtr->hasUnicode == 0) { |
---|
| 2704 | copyStringPtr = (String *) ckalloc(STRING_SIZE(STRING_UALLOC(0))); |
---|
| 2705 | copyStringPtr->uallocated = STRING_UALLOC(0); |
---|
| 2706 | } else { |
---|
| 2707 | copyStringPtr = (String *) ckalloc( |
---|
| 2708 | STRING_SIZE(srcStringPtr->uallocated)); |
---|
| 2709 | copyStringPtr->uallocated = srcStringPtr->uallocated; |
---|
| 2710 | |
---|
| 2711 | memcpy(copyStringPtr->unicode, srcStringPtr->unicode, |
---|
| 2712 | (size_t) srcStringPtr->numChars * sizeof(Tcl_UniChar)); |
---|
| 2713 | copyStringPtr->unicode[srcStringPtr->numChars] = 0; |
---|
| 2714 | } |
---|
| 2715 | copyStringPtr->numChars = srcStringPtr->numChars; |
---|
| 2716 | copyStringPtr->hasUnicode = srcStringPtr->hasUnicode; |
---|
| 2717 | copyStringPtr->allocated = srcStringPtr->allocated; |
---|
| 2718 | |
---|
| 2719 | /* |
---|
| 2720 | * Tricky point: the string value was copied by generic object management |
---|
| 2721 | * code, so it doesn't contain any extra bytes that might exist in the |
---|
| 2722 | * source object. |
---|
| 2723 | */ |
---|
| 2724 | |
---|
| 2725 | copyStringPtr->allocated = copyPtr->length; |
---|
| 2726 | |
---|
| 2727 | SET_STRING(copyPtr, copyStringPtr); |
---|
| 2728 | copyPtr->typePtr = &tclStringType; |
---|
| 2729 | } |
---|
| 2730 | |
---|
| 2731 | /* |
---|
| 2732 | *---------------------------------------------------------------------- |
---|
| 2733 | * |
---|
| 2734 | * SetStringFromAny -- |
---|
| 2735 | * |
---|
| 2736 | * Create an internal representation of type "String" for an object. |
---|
| 2737 | * |
---|
| 2738 | * Results: |
---|
| 2739 | * This operation always succeeds and returns TCL_OK. |
---|
| 2740 | * |
---|
| 2741 | * Side effects: |
---|
| 2742 | * Any old internal reputation for objPtr is freed and the internal |
---|
| 2743 | * representation is set to "String". |
---|
| 2744 | * |
---|
| 2745 | *---------------------------------------------------------------------- |
---|
| 2746 | */ |
---|
| 2747 | |
---|
| 2748 | static int |
---|
| 2749 | SetStringFromAny( |
---|
| 2750 | Tcl_Interp *interp, /* Used for error reporting if not NULL. */ |
---|
| 2751 | register Tcl_Obj *objPtr) /* The object to convert. */ |
---|
| 2752 | { |
---|
| 2753 | /* |
---|
| 2754 | * The Unicode object is optimized for the case where each UTF char in a |
---|
| 2755 | * string is only one byte. In this case, we store the value of numChars, |
---|
| 2756 | * but we don't copy the bytes to the unicodeObj->unicode. |
---|
| 2757 | */ |
---|
| 2758 | |
---|
| 2759 | if (objPtr->typePtr != &tclStringType) { |
---|
| 2760 | String *stringPtr; |
---|
| 2761 | |
---|
| 2762 | if (objPtr->typePtr != NULL) { |
---|
| 2763 | if (objPtr->bytes == NULL) { |
---|
| 2764 | objPtr->typePtr->updateStringProc(objPtr); |
---|
| 2765 | } |
---|
| 2766 | TclFreeIntRep(objPtr); |
---|
| 2767 | } |
---|
| 2768 | objPtr->typePtr = &tclStringType; |
---|
| 2769 | |
---|
| 2770 | /* |
---|
| 2771 | * Allocate enough space for the basic String structure. |
---|
| 2772 | */ |
---|
| 2773 | |
---|
| 2774 | stringPtr = (String *) ckalloc(STRING_SIZE(STRING_UALLOC(0))); |
---|
| 2775 | stringPtr->numChars = -1; |
---|
| 2776 | stringPtr->uallocated = STRING_UALLOC(0); |
---|
| 2777 | stringPtr->hasUnicode = 0; |
---|
| 2778 | |
---|
| 2779 | if (objPtr->bytes != NULL) { |
---|
| 2780 | stringPtr->allocated = objPtr->length; |
---|
| 2781 | objPtr->bytes[objPtr->length] = 0; |
---|
| 2782 | } else { |
---|
| 2783 | objPtr->length = 0; |
---|
| 2784 | } |
---|
| 2785 | SET_STRING(objPtr, stringPtr); |
---|
| 2786 | } |
---|
| 2787 | return TCL_OK; |
---|
| 2788 | } |
---|
| 2789 | |
---|
| 2790 | /* |
---|
| 2791 | *---------------------------------------------------------------------- |
---|
| 2792 | * |
---|
| 2793 | * UpdateStringOfString -- |
---|
| 2794 | * |
---|
| 2795 | * Update the string representation for an object whose internal |
---|
| 2796 | * representation is "String". |
---|
| 2797 | * |
---|
| 2798 | * Results: |
---|
| 2799 | * None. |
---|
| 2800 | * |
---|
| 2801 | * Side effects: |
---|
| 2802 | * The object's string may be set by converting its Unicode represention |
---|
| 2803 | * to UTF format. |
---|
| 2804 | * |
---|
| 2805 | *---------------------------------------------------------------------- |
---|
| 2806 | */ |
---|
| 2807 | |
---|
| 2808 | static void |
---|
| 2809 | UpdateStringOfString( |
---|
| 2810 | Tcl_Obj *objPtr) /* Object with string rep to update. */ |
---|
| 2811 | { |
---|
| 2812 | int i, size; |
---|
| 2813 | Tcl_UniChar *unicode; |
---|
| 2814 | char dummy[TCL_UTF_MAX]; |
---|
| 2815 | char *dst; |
---|
| 2816 | String *stringPtr; |
---|
| 2817 | |
---|
| 2818 | stringPtr = GET_STRING(objPtr); |
---|
| 2819 | if ((objPtr->bytes == NULL) || (stringPtr->allocated == 0)) { |
---|
| 2820 | if (stringPtr->numChars <= 0) { |
---|
| 2821 | /* |
---|
| 2822 | * If there is no Unicode rep, or the string has 0 chars, then set |
---|
| 2823 | * the string rep to an empty string. |
---|
| 2824 | */ |
---|
| 2825 | |
---|
| 2826 | objPtr->bytes = tclEmptyStringRep; |
---|
| 2827 | objPtr->length = 0; |
---|
| 2828 | return; |
---|
| 2829 | } |
---|
| 2830 | |
---|
| 2831 | unicode = stringPtr->unicode; |
---|
| 2832 | |
---|
| 2833 | /* |
---|
| 2834 | * Translate the Unicode string to UTF. "size" will hold the amount of |
---|
| 2835 | * space the UTF string needs. |
---|
| 2836 | */ |
---|
| 2837 | |
---|
| 2838 | size = 0; |
---|
| 2839 | for (i = 0; i < stringPtr->numChars; i++) { |
---|
| 2840 | size += Tcl_UniCharToUtf((int) unicode[i], dummy); |
---|
| 2841 | } |
---|
| 2842 | |
---|
| 2843 | dst = (char *) ckalloc((unsigned) (size + 1)); |
---|
| 2844 | objPtr->bytes = dst; |
---|
| 2845 | objPtr->length = size; |
---|
| 2846 | stringPtr->allocated = size; |
---|
| 2847 | |
---|
| 2848 | for (i = 0; i < stringPtr->numChars; i++) { |
---|
| 2849 | dst += Tcl_UniCharToUtf(unicode[i], dst); |
---|
| 2850 | } |
---|
| 2851 | *dst = '\0'; |
---|
| 2852 | } |
---|
| 2853 | return; |
---|
| 2854 | } |
---|
| 2855 | |
---|
| 2856 | /* |
---|
| 2857 | *---------------------------------------------------------------------- |
---|
| 2858 | * |
---|
| 2859 | * FreeStringInternalRep -- |
---|
| 2860 | * |
---|
| 2861 | * Deallocate the storage associated with a String data object's internal |
---|
| 2862 | * representation. |
---|
| 2863 | * |
---|
| 2864 | * Results: |
---|
| 2865 | * None. |
---|
| 2866 | * |
---|
| 2867 | * Side effects: |
---|
| 2868 | * Frees memory. |
---|
| 2869 | * |
---|
| 2870 | *---------------------------------------------------------------------- |
---|
| 2871 | */ |
---|
| 2872 | |
---|
| 2873 | static void |
---|
| 2874 | FreeStringInternalRep( |
---|
| 2875 | Tcl_Obj *objPtr) /* Object with internal rep to free. */ |
---|
| 2876 | { |
---|
| 2877 | ckfree((char *) GET_STRING(objPtr)); |
---|
| 2878 | } |
---|
| 2879 | |
---|
| 2880 | /* |
---|
| 2881 | * Local Variables: |
---|
| 2882 | * mode: c |
---|
| 2883 | * c-basic-offset: 4 |
---|
| 2884 | * fill-column: 78 |
---|
| 2885 | * End: |
---|
| 2886 | */ |
---|