[25] | 1 | /* |
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| 2 | * tclEncoding.c -- |
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| 3 | * |
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| 4 | * Contains the implementation of the encoding conversion package. |
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| 5 | * |
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| 6 | * Copyright (c) 1996-1998 Sun Microsystems, Inc. |
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| 7 | * |
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| 8 | * See the file "license.terms" for information on usage and redistribution of |
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| 9 | * this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 10 | * |
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| 11 | * RCS: @(#) $Id: tclEncoding.c,v 1.59 2008/03/11 22:25:12 das Exp $ |
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| 12 | */ |
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| 13 | |
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| 14 | #include "tclInt.h" |
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| 15 | |
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| 16 | typedef size_t (LengthProc)(CONST char *src); |
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| 17 | |
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| 18 | /* |
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| 19 | * The following data structure represents an encoding, which describes how to |
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| 20 | * convert between various character sets and UTF-8. |
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| 21 | */ |
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| 22 | |
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| 23 | typedef struct Encoding { |
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| 24 | char *name; /* Name of encoding. Malloced because (1) hash |
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| 25 | * table entry that owns this encoding may be |
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| 26 | * freed prior to this encoding being freed, |
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| 27 | * (2) string passed in the Tcl_EncodingType |
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| 28 | * structure may not be persistent. */ |
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| 29 | Tcl_EncodingConvertProc *toUtfProc; |
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| 30 | /* Function to convert from external encoding |
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| 31 | * into UTF-8. */ |
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| 32 | Tcl_EncodingConvertProc *fromUtfProc; |
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| 33 | /* Function to convert from UTF-8 into |
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| 34 | * external encoding. */ |
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| 35 | Tcl_EncodingFreeProc *freeProc; |
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| 36 | /* If non-NULL, function to call when this |
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| 37 | * encoding is deleted. */ |
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| 38 | int nullSize; /* Number of 0x00 bytes that signify |
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| 39 | * end-of-string in this encoding. This number |
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| 40 | * is used to determine the source string |
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| 41 | * length when the srcLen argument is |
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| 42 | * negative. This number can be 1 or 2. */ |
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| 43 | ClientData clientData; /* Arbitrary value associated with encoding |
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| 44 | * type. Passed to conversion functions. */ |
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| 45 | LengthProc *lengthProc; /* Function to compute length of |
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| 46 | * null-terminated strings in this encoding. |
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| 47 | * If nullSize is 1, this is strlen; if |
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| 48 | * nullSize is 2, this is a function that |
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| 49 | * returns the number of bytes in a 0x0000 |
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| 50 | * terminated string. */ |
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| 51 | int refCount; /* Number of uses of this structure. */ |
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| 52 | Tcl_HashEntry *hPtr; /* Hash table entry that owns this encoding. */ |
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| 53 | } Encoding; |
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| 54 | |
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| 55 | /* |
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| 56 | * The following structure is the clientData for a dynamically-loaded, |
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| 57 | * table-driven encoding created by LoadTableEncoding(). It maps between |
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| 58 | * Unicode and a single-byte, double-byte, or multibyte (1 or 2 bytes only) |
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| 59 | * encoding. |
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| 60 | */ |
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| 61 | |
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| 62 | typedef struct TableEncodingData { |
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| 63 | int fallback; /* Character (in this encoding) to substitute |
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| 64 | * when this encoding cannot represent a UTF-8 |
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| 65 | * character. */ |
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| 66 | char prefixBytes[256]; /* If a byte in the input stream is a lead |
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| 67 | * byte for a 2-byte sequence, the |
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| 68 | * corresponding entry in this array is 1, |
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| 69 | * otherwise it is 0. */ |
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| 70 | unsigned short **toUnicode; /* Two dimensional sparse matrix to map |
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| 71 | * characters from the encoding to Unicode. |
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| 72 | * Each element of the toUnicode array points |
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| 73 | * to an array of 256 shorts. If there is no |
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| 74 | * corresponding character in Unicode, the |
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| 75 | * value in the matrix is 0x0000. |
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| 76 | * malloc'd. */ |
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| 77 | unsigned short **fromUnicode; |
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| 78 | /* Two dimensional sparse matrix to map |
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| 79 | * characters from Unicode to the encoding. |
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| 80 | * Each element of the fromUnicode array |
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| 81 | * points to an array of 256 shorts. If there |
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| 82 | * is no corresponding character the encoding, |
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| 83 | * the value in the matrix is 0x0000. |
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| 84 | * malloc'd. */ |
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| 85 | } TableEncodingData; |
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| 86 | |
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| 87 | /* |
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| 88 | * The following structures is the clientData for a dynamically-loaded, |
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| 89 | * escape-driven encoding that is itself comprised of other simpler encodings. |
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| 90 | * An example is "iso-2022-jp", which uses escape sequences to switch between |
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| 91 | * ascii, jis0208, jis0212, gb2312, and ksc5601. Note that "escape-driven" |
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| 92 | * does not necessarily mean that the ESCAPE character is the character used |
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| 93 | * for switching character sets. |
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| 94 | */ |
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| 95 | |
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| 96 | typedef struct EscapeSubTable { |
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| 97 | unsigned int sequenceLen; /* Length of following string. */ |
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| 98 | char sequence[16]; /* Escape code that marks this encoding. */ |
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| 99 | char name[32]; /* Name for encoding. */ |
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| 100 | Encoding *encodingPtr; /* Encoding loaded using above name, or NULL |
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| 101 | * if this sub-encoding has not been needed |
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| 102 | * yet. */ |
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| 103 | } EscapeSubTable; |
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| 104 | |
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| 105 | typedef struct EscapeEncodingData { |
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| 106 | int fallback; /* Character (in this encoding) to substitute |
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| 107 | * when this encoding cannot represent a UTF-8 |
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| 108 | * character. */ |
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| 109 | unsigned int initLen; /* Length of following string. */ |
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| 110 | char init[16]; /* String to emit or expect before first char |
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| 111 | * in conversion. */ |
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| 112 | unsigned int finalLen; /* Length of following string. */ |
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| 113 | char final[16]; /* String to emit or expect after last char in |
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| 114 | * conversion. */ |
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| 115 | char prefixBytes[256]; /* If a byte in the input stream is the first |
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| 116 | * character of one of the escape sequences in |
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| 117 | * the following array, the corresponding |
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| 118 | * entry in this array is 1, otherwise it is |
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| 119 | * 0. */ |
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| 120 | int numSubTables; /* Length of following array. */ |
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| 121 | EscapeSubTable subTables[1];/* Information about each EscapeSubTable used |
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| 122 | * by this encoding type. The actual size will |
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| 123 | * be as large as necessary to hold all |
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| 124 | * EscapeSubTables. */ |
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| 125 | } EscapeEncodingData; |
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| 126 | |
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| 127 | /* |
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| 128 | * Constants used when loading an encoding file to identify the type of the |
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| 129 | * file. |
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| 130 | */ |
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| 131 | |
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| 132 | #define ENCODING_SINGLEBYTE 0 |
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| 133 | #define ENCODING_DOUBLEBYTE 1 |
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| 134 | #define ENCODING_MULTIBYTE 2 |
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| 135 | #define ENCODING_ESCAPE 3 |
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| 136 | |
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| 137 | /* |
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| 138 | * A list of directories in which Tcl should look for *.enc files. This list |
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| 139 | * is shared by all threads. Access is governed by a mutex lock. |
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| 140 | */ |
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| 141 | |
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| 142 | static TclInitProcessGlobalValueProc InitializeEncodingSearchPath; |
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| 143 | static ProcessGlobalValue encodingSearchPath = { |
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| 144 | 0, 0, NULL, NULL, InitializeEncodingSearchPath, NULL, NULL |
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| 145 | }; |
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| 146 | |
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| 147 | /* |
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| 148 | * A map from encoding names to the directories in which their data files have |
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| 149 | * been seen. The string value of the map is shared by all threads. Access to |
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| 150 | * the shared string is governed by a mutex lock. |
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| 151 | */ |
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| 152 | |
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| 153 | static ProcessGlobalValue encodingFileMap = { |
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| 154 | 0, 0, NULL, NULL, NULL, NULL, NULL |
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| 155 | }; |
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| 156 | |
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| 157 | /* |
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| 158 | * A list of directories making up the "library path". Historically this |
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| 159 | * search path has served many uses, but the only one remaining is a base for |
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| 160 | * the encodingSearchPath above. If the application does not explicitly set |
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| 161 | * the encodingSearchPath, then it will be initialized by appending /encoding |
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| 162 | * to each directory in this "libraryPath". |
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| 163 | */ |
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| 164 | |
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| 165 | static ProcessGlobalValue libraryPath = { |
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| 166 | 0, 0, NULL, NULL, TclpInitLibraryPath, NULL, NULL |
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| 167 | }; |
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| 168 | |
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| 169 | static int encodingsInitialized = 0; |
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| 170 | |
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| 171 | /* |
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| 172 | * Hash table that keeps track of all loaded Encodings. Keys are the string |
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| 173 | * names that represent the encoding, values are (Encoding *). |
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| 174 | */ |
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| 175 | |
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| 176 | static Tcl_HashTable encodingTable; |
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| 177 | TCL_DECLARE_MUTEX(encodingMutex) |
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| 178 | |
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| 179 | /* |
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| 180 | * The following are used to hold the default and current system encodings. |
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| 181 | * If NULL is passed to one of the conversion routines, the current setting of |
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| 182 | * the system encoding will be used to perform the conversion. |
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| 183 | */ |
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| 184 | |
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| 185 | static Tcl_Encoding defaultEncoding; |
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| 186 | static Tcl_Encoding systemEncoding; |
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| 187 | |
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| 188 | /* |
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| 189 | * The following variable is used in the sparse matrix code for a |
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| 190 | * TableEncoding to represent a page in the table that has no entries. |
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| 191 | */ |
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| 192 | |
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| 193 | static unsigned short emptyPage[256]; |
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| 194 | |
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| 195 | /* |
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| 196 | * Functions used only in this module. |
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| 197 | */ |
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| 198 | |
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| 199 | static int BinaryProc(ClientData clientData, |
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| 200 | CONST char *src, int srcLen, int flags, |
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| 201 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 202 | int *srcReadPtr, int *dstWrotePtr, |
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| 203 | int *dstCharsPtr); |
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| 204 | static void DupEncodingIntRep(Tcl_Obj *srcPtr, Tcl_Obj *dupPtr); |
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| 205 | static void EscapeFreeProc(ClientData clientData); |
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| 206 | static int EscapeFromUtfProc(ClientData clientData, |
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| 207 | CONST char *src, int srcLen, int flags, |
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| 208 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 209 | int *srcReadPtr, int *dstWrotePtr, |
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| 210 | int *dstCharsPtr); |
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| 211 | static int EscapeToUtfProc(ClientData clientData, |
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| 212 | CONST char *src, int srcLen, int flags, |
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| 213 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 214 | int *srcReadPtr, int *dstWrotePtr, |
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| 215 | int *dstCharsPtr); |
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| 216 | static void FillEncodingFileMap(void); |
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| 217 | static void FreeEncoding(Tcl_Encoding encoding); |
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| 218 | static void FreeEncodingIntRep(Tcl_Obj *objPtr); |
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| 219 | static Encoding * GetTableEncoding(EscapeEncodingData *dataPtr, |
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| 220 | int state); |
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| 221 | static Tcl_Encoding LoadEncodingFile(Tcl_Interp *interp, CONST char *name); |
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| 222 | static Tcl_Encoding LoadTableEncoding(CONST char *name, int type, |
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| 223 | Tcl_Channel chan); |
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| 224 | static Tcl_Encoding LoadEscapeEncoding(CONST char *name, Tcl_Channel chan); |
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| 225 | static Tcl_Channel OpenEncodingFileChannel(Tcl_Interp *interp, |
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| 226 | CONST char *name); |
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| 227 | static void TableFreeProc(ClientData clientData); |
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| 228 | static int TableFromUtfProc(ClientData clientData, |
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| 229 | CONST char *src, int srcLen, int flags, |
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| 230 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 231 | int *srcReadPtr, int *dstWrotePtr, |
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| 232 | int *dstCharsPtr); |
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| 233 | static int TableToUtfProc(ClientData clientData, CONST char *src, |
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| 234 | int srcLen, int flags, Tcl_EncodingState *statePtr, |
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| 235 | char *dst, int dstLen, int *srcReadPtr, |
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| 236 | int *dstWrotePtr, int *dstCharsPtr); |
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| 237 | static size_t unilen(CONST char *src); |
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| 238 | static int UnicodeToUtfProc(ClientData clientData, |
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| 239 | CONST char *src, int srcLen, int flags, |
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| 240 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 241 | int *srcReadPtr, int *dstWrotePtr, |
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| 242 | int *dstCharsPtr); |
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| 243 | static int UtfToUnicodeProc(ClientData clientData, |
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| 244 | CONST char *src, int srcLen, int flags, |
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| 245 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 246 | int *srcReadPtr, int *dstWrotePtr, |
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| 247 | int *dstCharsPtr); |
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| 248 | static int UtfToUtfProc(ClientData clientData, |
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| 249 | CONST char *src, int srcLen, int flags, |
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| 250 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 251 | int *srcReadPtr, int *dstWrotePtr, |
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| 252 | int *dstCharsPtr, int pureNullMode); |
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| 253 | static int UtfIntToUtfExtProc(ClientData clientData, |
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| 254 | CONST char *src, int srcLen, int flags, |
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| 255 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 256 | int *srcReadPtr, int *dstWrotePtr, |
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| 257 | int *dstCharsPtr); |
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| 258 | static int UtfExtToUtfIntProc(ClientData clientData, |
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| 259 | CONST char *src, int srcLen, int flags, |
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| 260 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 261 | int *srcReadPtr, int *dstWrotePtr, |
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| 262 | int *dstCharsPtr); |
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| 263 | static int Iso88591FromUtfProc(ClientData clientData, |
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| 264 | CONST char *src, int srcLen, int flags, |
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| 265 | Tcl_EncodingState *statePtr, char *dst, int dstLen, |
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| 266 | int *srcReadPtr, int *dstWrotePtr, |
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| 267 | int *dstCharsPtr); |
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| 268 | static int Iso88591ToUtfProc(ClientData clientData, |
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| 269 | CONST char *src, int srcLen, int flags, |
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| 270 | Tcl_EncodingState *statePtr, char *dst, |
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| 271 | int dstLen, int *srcReadPtr, int *dstWrotePtr, |
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| 272 | int *dstCharsPtr); |
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| 273 | |
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| 274 | /* |
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| 275 | * A Tcl_ObjType for holding a cached Tcl_Encoding in the otherValuePtr field |
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| 276 | * of the intrep. This should help the lifetime of encodings be more useful. |
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| 277 | * See concerns raised in [Bug 1077262]. |
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| 278 | */ |
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| 279 | |
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| 280 | static Tcl_ObjType encodingType = { |
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| 281 | "encoding", FreeEncodingIntRep, DupEncodingIntRep, NULL, NULL |
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| 282 | }; |
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| 283 | |
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| 284 | /* |
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| 285 | *---------------------------------------------------------------------- |
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| 286 | * |
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| 287 | * Tcl_GetEncodingFromObj -- |
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| 288 | * |
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| 289 | * Writes to (*encodingPtr) the Tcl_Encoding value of (*objPtr), if |
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| 290 | * possible, and returns TCL_OK. If no such encoding exists, TCL_ERROR is |
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| 291 | * returned, and if interp is non-NULL, an error message is written |
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| 292 | * there. |
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| 293 | * |
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| 294 | * Results: |
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| 295 | * Standard Tcl return code. |
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| 296 | * |
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| 297 | * Side effects: |
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| 298 | * Caches the Tcl_Encoding value as the internal rep of (*objPtr). |
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| 299 | * |
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| 300 | *---------------------------------------------------------------------- |
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| 301 | */ |
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| 302 | |
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| 303 | int |
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| 304 | Tcl_GetEncodingFromObj( |
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| 305 | Tcl_Interp *interp, |
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| 306 | Tcl_Obj *objPtr, |
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| 307 | Tcl_Encoding *encodingPtr) |
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| 308 | { |
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| 309 | CONST char *name = Tcl_GetString(objPtr); |
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| 310 | if (objPtr->typePtr != &encodingType) { |
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| 311 | Tcl_Encoding encoding = Tcl_GetEncoding(interp, name); |
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| 312 | |
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| 313 | if (encoding == NULL) { |
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| 314 | return TCL_ERROR; |
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| 315 | } |
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| 316 | TclFreeIntRep(objPtr); |
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| 317 | objPtr->internalRep.otherValuePtr = (VOID *) encoding; |
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| 318 | objPtr->typePtr = &encodingType; |
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| 319 | } |
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| 320 | *encodingPtr = Tcl_GetEncoding(NULL, name); |
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| 321 | return TCL_OK; |
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| 322 | } |
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| 323 | |
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| 324 | /* |
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| 325 | *---------------------------------------------------------------------- |
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| 326 | * |
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| 327 | * FreeEncodingIntRep -- |
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| 328 | * |
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| 329 | * The Tcl_FreeInternalRepProc for the "encoding" Tcl_ObjType. |
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| 330 | * |
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| 331 | *---------------------------------------------------------------------- |
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| 332 | */ |
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| 333 | |
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| 334 | static void |
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| 335 | FreeEncodingIntRep( |
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| 336 | Tcl_Obj *objPtr) |
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| 337 | { |
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| 338 | Tcl_FreeEncoding((Tcl_Encoding) objPtr->internalRep.otherValuePtr); |
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| 339 | } |
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| 340 | |
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| 341 | /* |
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| 342 | *---------------------------------------------------------------------- |
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| 343 | * |
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| 344 | * DupEncodingIntRep -- |
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| 345 | * |
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| 346 | * The Tcl_DupInternalRepProc for the "encoding" Tcl_ObjType. |
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| 347 | * |
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| 348 | *---------------------------------------------------------------------- |
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| 349 | */ |
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| 350 | |
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| 351 | static void |
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| 352 | DupEncodingIntRep( |
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| 353 | Tcl_Obj *srcPtr, |
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| 354 | Tcl_Obj *dupPtr) |
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| 355 | { |
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| 356 | dupPtr->internalRep.otherValuePtr = (VOID *) |
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| 357 | Tcl_GetEncoding(NULL, srcPtr->bytes); |
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| 358 | } |
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| 359 | |
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| 360 | /* |
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| 361 | *---------------------------------------------------------------------- |
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| 362 | * |
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| 363 | * Tcl_GetEncodingSearchPath -- |
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| 364 | * |
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| 365 | * Keeps the per-thread copy of the encoding search path current with |
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| 366 | * changes to the global copy. |
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| 367 | * |
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| 368 | * Results: |
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| 369 | * Returns a "list" (Tcl_Obj *) that contains the encoding search path. |
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| 370 | * |
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| 371 | *---------------------------------------------------------------------- |
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| 372 | */ |
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| 373 | |
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| 374 | Tcl_Obj * |
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| 375 | Tcl_GetEncodingSearchPath(void) |
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| 376 | { |
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| 377 | return TclGetProcessGlobalValue(&encodingSearchPath); |
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| 378 | } |
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| 379 | |
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| 380 | /* |
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| 381 | *---------------------------------------------------------------------- |
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| 382 | * |
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| 383 | * Tcl_SetEncodingSearchPath -- |
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| 384 | * |
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| 385 | * Keeps the per-thread copy of the encoding search path current with |
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| 386 | * changes to the global copy. |
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| 387 | * |
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| 388 | *---------------------------------------------------------------------- |
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| 389 | */ |
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| 390 | |
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| 391 | int |
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| 392 | Tcl_SetEncodingSearchPath( |
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| 393 | Tcl_Obj *searchPath) |
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| 394 | { |
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| 395 | int dummy; |
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| 396 | |
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| 397 | if (TCL_ERROR == Tcl_ListObjLength(NULL, searchPath, &dummy)) { |
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| 398 | return TCL_ERROR; |
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| 399 | } |
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| 400 | TclSetProcessGlobalValue(&encodingSearchPath, searchPath, NULL); |
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| 401 | return TCL_OK; |
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| 402 | } |
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| 403 | |
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| 404 | /* |
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| 405 | *---------------------------------------------------------------------- |
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| 406 | * |
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| 407 | * TclGetLibraryPath -- |
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| 408 | * |
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| 409 | * Keeps the per-thread copy of the library path current with changes to |
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| 410 | * the global copy. |
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| 411 | * |
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| 412 | * Results: |
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| 413 | * Returns a "list" (Tcl_Obj *) that contains the library path. |
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| 414 | * |
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| 415 | *---------------------------------------------------------------------- |
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| 416 | */ |
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| 417 | |
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| 418 | Tcl_Obj * |
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| 419 | TclGetLibraryPath(void) |
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| 420 | { |
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| 421 | return TclGetProcessGlobalValue(&libraryPath); |
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| 422 | } |
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| 423 | |
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| 424 | /* |
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| 425 | *---------------------------------------------------------------------- |
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| 426 | * |
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| 427 | * TclSetLibraryPath -- |
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| 428 | * |
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| 429 | * Keeps the per-thread copy of the library path current with changes to |
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| 430 | * the global copy. |
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| 431 | * |
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| 432 | * NOTE: this routine returns void, so there's no way to report the error |
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| 433 | * that searchPath is not a valid list. In that case, this routine will |
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| 434 | * silently do nothing. |
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| 435 | * |
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| 436 | *---------------------------------------------------------------------- |
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| 437 | */ |
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| 438 | |
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| 439 | void |
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| 440 | TclSetLibraryPath( |
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| 441 | Tcl_Obj *path) |
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| 442 | { |
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| 443 | int dummy; |
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| 444 | |
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| 445 | if (TCL_ERROR == Tcl_ListObjLength(NULL, path, &dummy)) { |
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| 446 | return; |
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| 447 | } |
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| 448 | TclSetProcessGlobalValue(&libraryPath, path, NULL); |
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| 449 | } |
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| 450 | |
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| 451 | /* |
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| 452 | *--------------------------------------------------------------------------- |
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| 453 | * |
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| 454 | * FillEncodingFileMap -- |
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| 455 | * |
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| 456 | * Called to bring the encoding file map in sync with the current value |
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| 457 | * of the encoding search path. |
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| 458 | * |
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| 459 | * Scan the directories on the encoding search path, find the *.enc |
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| 460 | * files, and store the found pathnames in a map associated with the |
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| 461 | * encoding name. |
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| 462 | * |
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| 463 | * In particular, if $dir is on the encoding search path, and the file |
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| 464 | * $dir/foo.enc is found, then store a "foo" -> $dir entry in the map. |
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| 465 | * Later, any need for the "foo" encoding will quickly * be able to |
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| 466 | * construct the $dir/foo.enc pathname for reading the encoding data. |
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| 467 | * |
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| 468 | * Results: |
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| 469 | * None. |
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| 470 | * |
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| 471 | * Side effects: |
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| 472 | * Entries are added to the encoding file map. |
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| 473 | * |
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| 474 | *--------------------------------------------------------------------------- |
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| 475 | */ |
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| 476 | |
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| 477 | static void |
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| 478 | FillEncodingFileMap(void) |
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| 479 | { |
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| 480 | int i, numDirs = 0; |
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| 481 | Tcl_Obj *map, *searchPath; |
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| 482 | |
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| 483 | searchPath = Tcl_GetEncodingSearchPath(); |
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| 484 | Tcl_IncrRefCount(searchPath); |
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| 485 | Tcl_ListObjLength(NULL, searchPath, &numDirs); |
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| 486 | map = Tcl_NewDictObj(); |
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| 487 | Tcl_IncrRefCount(map); |
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| 488 | |
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| 489 | for (i = numDirs-1; i >= 0; i--) { |
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| 490 | /* |
---|
| 491 | * Iterate backwards through the search path so as we overwrite |
---|
| 492 | * entries found, we favor files earlier on the search path. |
---|
| 493 | */ |
---|
| 494 | |
---|
| 495 | int j, numFiles; |
---|
| 496 | Tcl_Obj *directory, *matchFileList = Tcl_NewObj(); |
---|
| 497 | Tcl_Obj **filev; |
---|
| 498 | Tcl_GlobTypeData readableFiles = { |
---|
| 499 | TCL_GLOB_TYPE_FILE, TCL_GLOB_PERM_R, NULL, NULL |
---|
| 500 | }; |
---|
| 501 | |
---|
| 502 | Tcl_ListObjIndex(NULL, searchPath, i, &directory); |
---|
| 503 | Tcl_IncrRefCount(directory); |
---|
| 504 | Tcl_IncrRefCount(matchFileList); |
---|
| 505 | Tcl_FSMatchInDirectory(NULL, matchFileList, directory, "*.enc", |
---|
| 506 | &readableFiles); |
---|
| 507 | |
---|
| 508 | Tcl_ListObjGetElements(NULL, matchFileList, &numFiles, &filev); |
---|
| 509 | for (j=0; j<numFiles; j++) { |
---|
| 510 | Tcl_Obj *encodingName, *file; |
---|
| 511 | |
---|
| 512 | file = TclPathPart(NULL, filev[j], TCL_PATH_TAIL); |
---|
| 513 | encodingName = TclPathPart(NULL, file, TCL_PATH_ROOT); |
---|
| 514 | Tcl_DictObjPut(NULL, map, encodingName, directory); |
---|
| 515 | Tcl_DecrRefCount(file); |
---|
| 516 | Tcl_DecrRefCount(encodingName); |
---|
| 517 | } |
---|
| 518 | Tcl_DecrRefCount(matchFileList); |
---|
| 519 | Tcl_DecrRefCount(directory); |
---|
| 520 | } |
---|
| 521 | Tcl_DecrRefCount(searchPath); |
---|
| 522 | TclSetProcessGlobalValue(&encodingFileMap, map, NULL); |
---|
| 523 | Tcl_DecrRefCount(map); |
---|
| 524 | } |
---|
| 525 | |
---|
| 526 | /* |
---|
| 527 | *--------------------------------------------------------------------------- |
---|
| 528 | * |
---|
| 529 | * TclInitEncodingSubsystem -- |
---|
| 530 | * |
---|
| 531 | * Initialize all resources used by this subsystem on a per-process |
---|
| 532 | * basis. |
---|
| 533 | * |
---|
| 534 | * Results: |
---|
| 535 | * None. |
---|
| 536 | * |
---|
| 537 | * Side effects: |
---|
| 538 | * Depends on the memory, object, and IO subsystems. |
---|
| 539 | * |
---|
| 540 | *--------------------------------------------------------------------------- |
---|
| 541 | */ |
---|
| 542 | |
---|
| 543 | void |
---|
| 544 | TclInitEncodingSubsystem(void) |
---|
| 545 | { |
---|
| 546 | Tcl_EncodingType type; |
---|
| 547 | |
---|
| 548 | if (encodingsInitialized) { |
---|
| 549 | return; |
---|
| 550 | } |
---|
| 551 | |
---|
| 552 | Tcl_MutexLock(&encodingMutex); |
---|
| 553 | Tcl_InitHashTable(&encodingTable, TCL_STRING_KEYS); |
---|
| 554 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 555 | |
---|
| 556 | /* |
---|
| 557 | * Create a few initial encodings. Note that the UTF-8 to UTF-8 |
---|
| 558 | * translation is not a no-op, because it will turn a stream of improperly |
---|
| 559 | * formed UTF-8 into a properly formed stream. |
---|
| 560 | */ |
---|
| 561 | |
---|
| 562 | type.encodingName = "identity"; |
---|
| 563 | type.toUtfProc = BinaryProc; |
---|
| 564 | type.fromUtfProc = BinaryProc; |
---|
| 565 | type.freeProc = NULL; |
---|
| 566 | type.nullSize = 1; |
---|
| 567 | type.clientData = NULL; |
---|
| 568 | |
---|
| 569 | defaultEncoding = Tcl_CreateEncoding(&type); |
---|
| 570 | systemEncoding = Tcl_GetEncoding(NULL, type.encodingName); |
---|
| 571 | |
---|
| 572 | type.encodingName = "utf-8"; |
---|
| 573 | type.toUtfProc = UtfExtToUtfIntProc; |
---|
| 574 | type.fromUtfProc = UtfIntToUtfExtProc; |
---|
| 575 | type.freeProc = NULL; |
---|
| 576 | type.nullSize = 1; |
---|
| 577 | type.clientData = NULL; |
---|
| 578 | Tcl_CreateEncoding(&type); |
---|
| 579 | |
---|
| 580 | type.encodingName = "unicode"; |
---|
| 581 | type.toUtfProc = UnicodeToUtfProc; |
---|
| 582 | type.fromUtfProc = UtfToUnicodeProc; |
---|
| 583 | type.freeProc = NULL; |
---|
| 584 | type.nullSize = 2; |
---|
| 585 | type.clientData = NULL; |
---|
| 586 | Tcl_CreateEncoding(&type); |
---|
| 587 | |
---|
| 588 | /* |
---|
| 589 | * Need the iso8859-1 encoding in order to process binary data, so force |
---|
| 590 | * it to always be embedded. Note that this encoding *must* be a proper |
---|
| 591 | * table encoding or some of the escape encodings crash! Hence the ugly |
---|
| 592 | * code to duplicate the structure of a table encoding here. |
---|
| 593 | */ |
---|
| 594 | |
---|
| 595 | { |
---|
| 596 | TableEncodingData *dataPtr = (TableEncodingData *) |
---|
| 597 | ckalloc(sizeof(TableEncodingData)); |
---|
| 598 | unsigned size; |
---|
| 599 | unsigned short i; |
---|
| 600 | |
---|
| 601 | memset(dataPtr, 0, sizeof(TableEncodingData)); |
---|
| 602 | dataPtr->fallback = '?'; |
---|
| 603 | |
---|
| 604 | size = 256*(sizeof(unsigned short *) + sizeof(unsigned short)); |
---|
| 605 | dataPtr->toUnicode = (unsigned short **) ckalloc(size); |
---|
| 606 | memset(dataPtr->toUnicode, 0, size); |
---|
| 607 | dataPtr->fromUnicode = (unsigned short **) ckalloc(size); |
---|
| 608 | memset(dataPtr->fromUnicode, 0, size); |
---|
| 609 | |
---|
| 610 | dataPtr->toUnicode[0] = (unsigned short *) (dataPtr->toUnicode + 256); |
---|
| 611 | dataPtr->fromUnicode[0] = (unsigned short *) |
---|
| 612 | (dataPtr->fromUnicode + 256); |
---|
| 613 | for (i=1 ; i<256 ; i++) { |
---|
| 614 | dataPtr->toUnicode[i] = emptyPage; |
---|
| 615 | dataPtr->fromUnicode[i] = emptyPage; |
---|
| 616 | } |
---|
| 617 | |
---|
| 618 | for (i=0 ; i<256 ; i++) { |
---|
| 619 | dataPtr->toUnicode[0][i] = i; |
---|
| 620 | dataPtr->fromUnicode[0][i] = i; |
---|
| 621 | } |
---|
| 622 | |
---|
| 623 | type.encodingName = "iso8859-1"; |
---|
| 624 | type.toUtfProc = Iso88591ToUtfProc; |
---|
| 625 | type.fromUtfProc = Iso88591FromUtfProc; |
---|
| 626 | type.freeProc = TableFreeProc; |
---|
| 627 | type.nullSize = 1; |
---|
| 628 | type.clientData = dataPtr; |
---|
| 629 | Tcl_CreateEncoding(&type); |
---|
| 630 | } |
---|
| 631 | |
---|
| 632 | encodingsInitialized = 1; |
---|
| 633 | } |
---|
| 634 | |
---|
| 635 | /* |
---|
| 636 | *---------------------------------------------------------------------- |
---|
| 637 | * |
---|
| 638 | * TclFinalizeEncodingSubsystem -- |
---|
| 639 | * |
---|
| 640 | * Release the state associated with the encoding subsystem. |
---|
| 641 | * |
---|
| 642 | * Results: |
---|
| 643 | * None. |
---|
| 644 | * |
---|
| 645 | * Side effects: |
---|
| 646 | * Frees all of the encodings. |
---|
| 647 | * |
---|
| 648 | *---------------------------------------------------------------------- |
---|
| 649 | */ |
---|
| 650 | |
---|
| 651 | void |
---|
| 652 | TclFinalizeEncodingSubsystem(void) |
---|
| 653 | { |
---|
| 654 | Tcl_HashSearch search; |
---|
| 655 | Tcl_HashEntry *hPtr; |
---|
| 656 | |
---|
| 657 | Tcl_MutexLock(&encodingMutex); |
---|
| 658 | encodingsInitialized = 0; |
---|
| 659 | FreeEncoding(systemEncoding); |
---|
| 660 | |
---|
| 661 | hPtr = Tcl_FirstHashEntry(&encodingTable, &search); |
---|
| 662 | while (hPtr != NULL) { |
---|
| 663 | /* |
---|
| 664 | * Call FreeEncoding instead of doing it directly to handle refcounts |
---|
| 665 | * like escape encodings use. [Bug 524674] Make sure to call |
---|
| 666 | * Tcl_FirstHashEntry repeatedly so that all encodings are eventually |
---|
| 667 | * cleaned up. |
---|
| 668 | */ |
---|
| 669 | |
---|
| 670 | FreeEncoding((Tcl_Encoding) Tcl_GetHashValue(hPtr)); |
---|
| 671 | hPtr = Tcl_FirstHashEntry(&encodingTable, &search); |
---|
| 672 | } |
---|
| 673 | |
---|
| 674 | Tcl_DeleteHashTable(&encodingTable); |
---|
| 675 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 676 | } |
---|
| 677 | |
---|
| 678 | /* |
---|
| 679 | *------------------------------------------------------------------------- |
---|
| 680 | * |
---|
| 681 | * Tcl_GetDefaultEncodingDir -- |
---|
| 682 | * |
---|
| 683 | * Legacy public interface to retrieve first directory in the encoding |
---|
| 684 | * searchPath. |
---|
| 685 | * |
---|
| 686 | * Results: |
---|
| 687 | * The directory pathname, as a string, or NULL for an empty encoding |
---|
| 688 | * search path. |
---|
| 689 | * |
---|
| 690 | * Side effects: |
---|
| 691 | * None. |
---|
| 692 | * |
---|
| 693 | *------------------------------------------------------------------------- |
---|
| 694 | */ |
---|
| 695 | |
---|
| 696 | CONST char * |
---|
| 697 | Tcl_GetDefaultEncodingDir(void) |
---|
| 698 | { |
---|
| 699 | int numDirs; |
---|
| 700 | Tcl_Obj *first, *searchPath = Tcl_GetEncodingSearchPath(); |
---|
| 701 | |
---|
| 702 | Tcl_ListObjLength(NULL, searchPath, &numDirs); |
---|
| 703 | if (numDirs == 0) { |
---|
| 704 | return NULL; |
---|
| 705 | } |
---|
| 706 | Tcl_ListObjIndex(NULL, searchPath, 0, &first); |
---|
| 707 | |
---|
| 708 | return Tcl_GetString(first); |
---|
| 709 | } |
---|
| 710 | |
---|
| 711 | /* |
---|
| 712 | *------------------------------------------------------------------------- |
---|
| 713 | * |
---|
| 714 | * Tcl_SetDefaultEncodingDir -- |
---|
| 715 | * |
---|
| 716 | * Legacy public interface to set the first directory in the encoding |
---|
| 717 | * search path. |
---|
| 718 | * |
---|
| 719 | * Results: |
---|
| 720 | * None. |
---|
| 721 | * |
---|
| 722 | * Side effects: |
---|
| 723 | * Modifies the encoding search path. |
---|
| 724 | * |
---|
| 725 | *------------------------------------------------------------------------- |
---|
| 726 | */ |
---|
| 727 | |
---|
| 728 | void |
---|
| 729 | Tcl_SetDefaultEncodingDir( |
---|
| 730 | CONST char *path) |
---|
| 731 | { |
---|
| 732 | Tcl_Obj *searchPath = Tcl_GetEncodingSearchPath(); |
---|
| 733 | Tcl_Obj *directory = Tcl_NewStringObj(path, -1); |
---|
| 734 | |
---|
| 735 | searchPath = Tcl_DuplicateObj(searchPath); |
---|
| 736 | Tcl_ListObjReplace(NULL, searchPath, 0, 0, 1, &directory); |
---|
| 737 | Tcl_SetEncodingSearchPath(searchPath); |
---|
| 738 | } |
---|
| 739 | |
---|
| 740 | /* |
---|
| 741 | *------------------------------------------------------------------------- |
---|
| 742 | * |
---|
| 743 | * Tcl_GetEncoding -- |
---|
| 744 | * |
---|
| 745 | * Given the name of a encoding, find the corresponding Tcl_Encoding |
---|
| 746 | * token. If the encoding did not already exist, Tcl attempts to |
---|
| 747 | * dynamically load an encoding by that name. |
---|
| 748 | * |
---|
| 749 | * Results: |
---|
| 750 | * Returns a token that represents the encoding. If the name didn't refer |
---|
| 751 | * to any known or loadable encoding, NULL is returned. If NULL was |
---|
| 752 | * returned, an error message is left in interp's result object, unless |
---|
| 753 | * interp was NULL. |
---|
| 754 | * |
---|
| 755 | * Side effects: |
---|
| 756 | * The new encoding type is entered into a table visible to all |
---|
| 757 | * interpreters, keyed off the encoding's name. For each call to this |
---|
| 758 | * function, there should eventually be a call to Tcl_FreeEncoding, so |
---|
| 759 | * that the database can be cleaned up when encodings aren't needed |
---|
| 760 | * anymore. |
---|
| 761 | * |
---|
| 762 | *------------------------------------------------------------------------- |
---|
| 763 | */ |
---|
| 764 | |
---|
| 765 | Tcl_Encoding |
---|
| 766 | Tcl_GetEncoding( |
---|
| 767 | Tcl_Interp *interp, /* Interp for error reporting, if not NULL. */ |
---|
| 768 | CONST char *name) /* The name of the desired encoding. */ |
---|
| 769 | { |
---|
| 770 | Tcl_HashEntry *hPtr; |
---|
| 771 | Encoding *encodingPtr; |
---|
| 772 | |
---|
| 773 | Tcl_MutexLock(&encodingMutex); |
---|
| 774 | if (name == NULL) { |
---|
| 775 | encodingPtr = (Encoding *) systemEncoding; |
---|
| 776 | encodingPtr->refCount++; |
---|
| 777 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 778 | return systemEncoding; |
---|
| 779 | } |
---|
| 780 | |
---|
| 781 | hPtr = Tcl_FindHashEntry(&encodingTable, name); |
---|
| 782 | if (hPtr != NULL) { |
---|
| 783 | encodingPtr = (Encoding *) Tcl_GetHashValue(hPtr); |
---|
| 784 | encodingPtr->refCount++; |
---|
| 785 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 786 | return (Tcl_Encoding) encodingPtr; |
---|
| 787 | } |
---|
| 788 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 789 | |
---|
| 790 | return LoadEncodingFile(interp, name); |
---|
| 791 | } |
---|
| 792 | |
---|
| 793 | /* |
---|
| 794 | *--------------------------------------------------------------------------- |
---|
| 795 | * |
---|
| 796 | * Tcl_FreeEncoding -- |
---|
| 797 | * |
---|
| 798 | * This function is called to release an encoding allocated by |
---|
| 799 | * Tcl_CreateEncoding() or Tcl_GetEncoding(). |
---|
| 800 | * |
---|
| 801 | * Results: |
---|
| 802 | * None. |
---|
| 803 | * |
---|
| 804 | * Side effects: |
---|
| 805 | * The reference count associated with the encoding is decremented and |
---|
| 806 | * the encoding may be deleted if nothing is using it anymore. |
---|
| 807 | * |
---|
| 808 | *--------------------------------------------------------------------------- |
---|
| 809 | */ |
---|
| 810 | |
---|
| 811 | void |
---|
| 812 | Tcl_FreeEncoding( |
---|
| 813 | Tcl_Encoding encoding) |
---|
| 814 | { |
---|
| 815 | Tcl_MutexLock(&encodingMutex); |
---|
| 816 | FreeEncoding(encoding); |
---|
| 817 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 818 | } |
---|
| 819 | |
---|
| 820 | /* |
---|
| 821 | *---------------------------------------------------------------------- |
---|
| 822 | * |
---|
| 823 | * FreeEncoding -- |
---|
| 824 | * |
---|
| 825 | * This function is called to release an encoding by functions that |
---|
| 826 | * already have the encodingMutex. |
---|
| 827 | * |
---|
| 828 | * Results: |
---|
| 829 | * None. |
---|
| 830 | * |
---|
| 831 | * Side effects: |
---|
| 832 | * The reference count associated with the encoding is decremented and |
---|
| 833 | * the encoding may be deleted if nothing is using it anymore. |
---|
| 834 | * |
---|
| 835 | *---------------------------------------------------------------------- |
---|
| 836 | */ |
---|
| 837 | |
---|
| 838 | static void |
---|
| 839 | FreeEncoding( |
---|
| 840 | Tcl_Encoding encoding) |
---|
| 841 | { |
---|
| 842 | Encoding *encodingPtr; |
---|
| 843 | |
---|
| 844 | encodingPtr = (Encoding *) encoding; |
---|
| 845 | if (encodingPtr == NULL) { |
---|
| 846 | return; |
---|
| 847 | } |
---|
| 848 | encodingPtr->refCount--; |
---|
| 849 | if (encodingPtr->refCount == 0) { |
---|
| 850 | if (encodingPtr->freeProc != NULL) { |
---|
| 851 | (*encodingPtr->freeProc)(encodingPtr->clientData); |
---|
| 852 | } |
---|
| 853 | if (encodingPtr->hPtr != NULL) { |
---|
| 854 | Tcl_DeleteHashEntry(encodingPtr->hPtr); |
---|
| 855 | } |
---|
| 856 | ckfree((char *) encodingPtr->name); |
---|
| 857 | ckfree((char *) encodingPtr); |
---|
| 858 | } |
---|
| 859 | } |
---|
| 860 | |
---|
| 861 | /* |
---|
| 862 | *------------------------------------------------------------------------- |
---|
| 863 | * |
---|
| 864 | * Tcl_GetEncodingName -- |
---|
| 865 | * |
---|
| 866 | * Given an encoding, return the name that was used to constuct the |
---|
| 867 | * encoding. |
---|
| 868 | * |
---|
| 869 | * Results: |
---|
| 870 | * The name of the encoding. |
---|
| 871 | * |
---|
| 872 | * Side effects: |
---|
| 873 | * None. |
---|
| 874 | * |
---|
| 875 | *--------------------------------------------------------------------------- |
---|
| 876 | */ |
---|
| 877 | |
---|
| 878 | CONST char * |
---|
| 879 | Tcl_GetEncodingName( |
---|
| 880 | Tcl_Encoding encoding) /* The encoding whose name to fetch. */ |
---|
| 881 | { |
---|
| 882 | if (encoding == NULL) { |
---|
| 883 | encoding = systemEncoding; |
---|
| 884 | } |
---|
| 885 | |
---|
| 886 | return ((Encoding *) encoding)->name; |
---|
| 887 | } |
---|
| 888 | |
---|
| 889 | /* |
---|
| 890 | *------------------------------------------------------------------------- |
---|
| 891 | * |
---|
| 892 | * Tcl_GetEncodingNames -- |
---|
| 893 | * |
---|
| 894 | * Get the list of all known encodings, including the ones stored as |
---|
| 895 | * files on disk in the encoding path. |
---|
| 896 | * |
---|
| 897 | * Results: |
---|
| 898 | * Modifies interp's result object to hold a list of all the available |
---|
| 899 | * encodings. |
---|
| 900 | * |
---|
| 901 | * Side effects: |
---|
| 902 | * None. |
---|
| 903 | * |
---|
| 904 | *------------------------------------------------------------------------- |
---|
| 905 | */ |
---|
| 906 | |
---|
| 907 | void |
---|
| 908 | Tcl_GetEncodingNames( |
---|
| 909 | Tcl_Interp *interp) /* Interp to hold result. */ |
---|
| 910 | { |
---|
| 911 | Tcl_HashTable table; |
---|
| 912 | Tcl_HashSearch search; |
---|
| 913 | Tcl_HashEntry *hPtr; |
---|
| 914 | Tcl_Obj *map, *name, *result = Tcl_NewObj(); |
---|
| 915 | Tcl_DictSearch mapSearch; |
---|
| 916 | int dummy, done = 0; |
---|
| 917 | |
---|
| 918 | Tcl_InitObjHashTable(&table); |
---|
| 919 | |
---|
| 920 | /* |
---|
| 921 | * Copy encoding names from loaded encoding table to table. |
---|
| 922 | */ |
---|
| 923 | |
---|
| 924 | Tcl_MutexLock(&encodingMutex); |
---|
| 925 | for (hPtr = Tcl_FirstHashEntry(&encodingTable, &search); hPtr != NULL; |
---|
| 926 | hPtr = Tcl_NextHashEntry(&search)) { |
---|
| 927 | Encoding *encodingPtr = (Encoding *) Tcl_GetHashValue(hPtr); |
---|
| 928 | Tcl_CreateHashEntry(&table, |
---|
| 929 | (char *) Tcl_NewStringObj(encodingPtr->name, -1), &dummy); |
---|
| 930 | } |
---|
| 931 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 932 | |
---|
| 933 | FillEncodingFileMap(); |
---|
| 934 | map = TclGetProcessGlobalValue(&encodingFileMap); |
---|
| 935 | |
---|
| 936 | /* |
---|
| 937 | * Copy encoding names from encoding file map to table. |
---|
| 938 | */ |
---|
| 939 | |
---|
| 940 | Tcl_DictObjFirst(NULL, map, &mapSearch, &name, NULL, &done); |
---|
| 941 | for (; !done; Tcl_DictObjNext(&mapSearch, &name, NULL, &done)) { |
---|
| 942 | Tcl_CreateHashEntry(&table, (char *) name, &dummy); |
---|
| 943 | } |
---|
| 944 | |
---|
| 945 | /* |
---|
| 946 | * Pull all encoding names from table into the result list. |
---|
| 947 | */ |
---|
| 948 | |
---|
| 949 | for (hPtr = Tcl_FirstHashEntry(&table, &search); hPtr != NULL; |
---|
| 950 | hPtr = Tcl_NextHashEntry(&search)) { |
---|
| 951 | Tcl_ListObjAppendElement(NULL, result, |
---|
| 952 | (Tcl_Obj *) Tcl_GetHashKey(&table, hPtr)); |
---|
| 953 | } |
---|
| 954 | Tcl_SetObjResult(interp, result); |
---|
| 955 | Tcl_DeleteHashTable(&table); |
---|
| 956 | } |
---|
| 957 | |
---|
| 958 | /* |
---|
| 959 | *------------------------------------------------------------------------ |
---|
| 960 | * |
---|
| 961 | * Tcl_SetSystemEncoding -- |
---|
| 962 | * |
---|
| 963 | * Sets the default encoding that should be used whenever the user passes |
---|
| 964 | * a NULL value in to one of the conversion routines. If the supplied |
---|
| 965 | * name is NULL, the system encoding is reset to the default system |
---|
| 966 | * encoding. |
---|
| 967 | * |
---|
| 968 | * Results: |
---|
| 969 | * The return value is TCL_OK if the system encoding was successfully set |
---|
| 970 | * to the encoding specified by name, TCL_ERROR otherwise. If TCL_ERROR |
---|
| 971 | * is returned, an error message is left in interp's result object, |
---|
| 972 | * unless interp was NULL. |
---|
| 973 | * |
---|
| 974 | * Side effects: |
---|
| 975 | * The reference count of the new system encoding is incremented. The |
---|
| 976 | * reference count of the old system encoding is decremented and it may |
---|
| 977 | * be freed. |
---|
| 978 | * |
---|
| 979 | *------------------------------------------------------------------------ |
---|
| 980 | */ |
---|
| 981 | |
---|
| 982 | int |
---|
| 983 | Tcl_SetSystemEncoding( |
---|
| 984 | Tcl_Interp *interp, /* Interp for error reporting, if not NULL. */ |
---|
| 985 | CONST char *name) /* The name of the desired encoding, or NULL |
---|
| 986 | * to reset to default encoding. */ |
---|
| 987 | { |
---|
| 988 | Tcl_Encoding encoding; |
---|
| 989 | Encoding *encodingPtr; |
---|
| 990 | |
---|
| 991 | if (name == NULL) { |
---|
| 992 | Tcl_MutexLock(&encodingMutex); |
---|
| 993 | encoding = defaultEncoding; |
---|
| 994 | encodingPtr = (Encoding *) encoding; |
---|
| 995 | encodingPtr->refCount++; |
---|
| 996 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 997 | } else { |
---|
| 998 | encoding = Tcl_GetEncoding(interp, name); |
---|
| 999 | if (encoding == NULL) { |
---|
| 1000 | return TCL_ERROR; |
---|
| 1001 | } |
---|
| 1002 | } |
---|
| 1003 | |
---|
| 1004 | Tcl_MutexLock(&encodingMutex); |
---|
| 1005 | FreeEncoding(systemEncoding); |
---|
| 1006 | systemEncoding = encoding; |
---|
| 1007 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 1008 | |
---|
| 1009 | return TCL_OK; |
---|
| 1010 | } |
---|
| 1011 | |
---|
| 1012 | /* |
---|
| 1013 | *--------------------------------------------------------------------------- |
---|
| 1014 | * |
---|
| 1015 | * Tcl_CreateEncoding -- |
---|
| 1016 | * |
---|
| 1017 | * This function is called to define a new encoding and the functions |
---|
| 1018 | * that are used to convert between the specified encoding and Unicode. |
---|
| 1019 | * |
---|
| 1020 | * Results: |
---|
| 1021 | * Returns a token that represents the encoding. If an encoding with the |
---|
| 1022 | * same name already existed, the old encoding token remains valid and |
---|
| 1023 | * continues to behave as it used to, and will eventually be garbage |
---|
| 1024 | * collected when the last reference to it goes away. Any subsequent |
---|
| 1025 | * calls to Tcl_GetEncoding with the specified name will retrieve the |
---|
| 1026 | * most recent encoding token. |
---|
| 1027 | * |
---|
| 1028 | * Side effects: |
---|
| 1029 | * The new encoding type is entered into a table visible to all |
---|
| 1030 | * interpreters, keyed off the encoding's name. For each call to this |
---|
| 1031 | * function, there should eventually be a call to Tcl_FreeEncoding, so |
---|
| 1032 | * that the database can be cleaned up when encodings aren't needed |
---|
| 1033 | * anymore. |
---|
| 1034 | * |
---|
| 1035 | *--------------------------------------------------------------------------- |
---|
| 1036 | */ |
---|
| 1037 | |
---|
| 1038 | Tcl_Encoding |
---|
| 1039 | Tcl_CreateEncoding( |
---|
| 1040 | const Tcl_EncodingType *typePtr) |
---|
| 1041 | /* The encoding type. */ |
---|
| 1042 | { |
---|
| 1043 | Tcl_HashEntry *hPtr; |
---|
| 1044 | int isNew; |
---|
| 1045 | Encoding *encodingPtr; |
---|
| 1046 | char *name; |
---|
| 1047 | |
---|
| 1048 | Tcl_MutexLock(&encodingMutex); |
---|
| 1049 | hPtr = Tcl_CreateHashEntry(&encodingTable, typePtr->encodingName, &isNew); |
---|
| 1050 | if (isNew == 0) { |
---|
| 1051 | /* |
---|
| 1052 | * Remove old encoding from hash table, but don't delete it until last |
---|
| 1053 | * reference goes away. |
---|
| 1054 | */ |
---|
| 1055 | |
---|
| 1056 | encodingPtr = (Encoding *) Tcl_GetHashValue(hPtr); |
---|
| 1057 | encodingPtr->hPtr = NULL; |
---|
| 1058 | } |
---|
| 1059 | |
---|
| 1060 | name = ckalloc((unsigned) strlen(typePtr->encodingName) + 1); |
---|
| 1061 | |
---|
| 1062 | encodingPtr = (Encoding *) ckalloc(sizeof(Encoding)); |
---|
| 1063 | encodingPtr->name = strcpy(name, typePtr->encodingName); |
---|
| 1064 | encodingPtr->toUtfProc = typePtr->toUtfProc; |
---|
| 1065 | encodingPtr->fromUtfProc = typePtr->fromUtfProc; |
---|
| 1066 | encodingPtr->freeProc = typePtr->freeProc; |
---|
| 1067 | encodingPtr->nullSize = typePtr->nullSize; |
---|
| 1068 | encodingPtr->clientData = typePtr->clientData; |
---|
| 1069 | if (typePtr->nullSize == 1) { |
---|
| 1070 | encodingPtr->lengthProc = (LengthProc *) strlen; |
---|
| 1071 | } else { |
---|
| 1072 | encodingPtr->lengthProc = (LengthProc *) unilen; |
---|
| 1073 | } |
---|
| 1074 | encodingPtr->refCount = 1; |
---|
| 1075 | encodingPtr->hPtr = hPtr; |
---|
| 1076 | Tcl_SetHashValue(hPtr, encodingPtr); |
---|
| 1077 | |
---|
| 1078 | Tcl_MutexUnlock(&encodingMutex); |
---|
| 1079 | |
---|
| 1080 | return (Tcl_Encoding) encodingPtr; |
---|
| 1081 | } |
---|
| 1082 | |
---|
| 1083 | /* |
---|
| 1084 | *------------------------------------------------------------------------- |
---|
| 1085 | * |
---|
| 1086 | * Tcl_ExternalToUtfDString -- |
---|
| 1087 | * |
---|
| 1088 | * Convert a source buffer from the specified encoding into UTF-8. If any |
---|
| 1089 | * of the bytes in the source buffer are invalid or cannot be represented |
---|
| 1090 | * in the target encoding, a default fallback character will be |
---|
| 1091 | * substituted. |
---|
| 1092 | * |
---|
| 1093 | * Results: |
---|
| 1094 | * The converted bytes are stored in the DString, which is then NULL |
---|
| 1095 | * terminated. The return value is a pointer to the value stored in the |
---|
| 1096 | * DString. |
---|
| 1097 | * |
---|
| 1098 | * Side effects: |
---|
| 1099 | * None. |
---|
| 1100 | * |
---|
| 1101 | *------------------------------------------------------------------------- |
---|
| 1102 | */ |
---|
| 1103 | |
---|
| 1104 | char * |
---|
| 1105 | Tcl_ExternalToUtfDString( |
---|
| 1106 | Tcl_Encoding encoding, /* The encoding for the source string, or NULL |
---|
| 1107 | * for the default system encoding. */ |
---|
| 1108 | CONST char *src, /* Source string in specified encoding. */ |
---|
| 1109 | int srcLen, /* Source string length in bytes, or < 0 for |
---|
| 1110 | * encoding-specific string length. */ |
---|
| 1111 | Tcl_DString *dstPtr) /* Uninitialized or free DString in which the |
---|
| 1112 | * converted string is stored. */ |
---|
| 1113 | { |
---|
| 1114 | char *dst; |
---|
| 1115 | Tcl_EncodingState state; |
---|
| 1116 | Encoding *encodingPtr; |
---|
| 1117 | int flags, dstLen, result, soFar, srcRead, dstWrote, dstChars; |
---|
| 1118 | |
---|
| 1119 | Tcl_DStringInit(dstPtr); |
---|
| 1120 | dst = Tcl_DStringValue(dstPtr); |
---|
| 1121 | dstLen = dstPtr->spaceAvl - 1; |
---|
| 1122 | |
---|
| 1123 | if (encoding == NULL) { |
---|
| 1124 | encoding = systemEncoding; |
---|
| 1125 | } |
---|
| 1126 | encodingPtr = (Encoding *) encoding; |
---|
| 1127 | |
---|
| 1128 | if (src == NULL) { |
---|
| 1129 | srcLen = 0; |
---|
| 1130 | } else if (srcLen < 0) { |
---|
| 1131 | srcLen = (*encodingPtr->lengthProc)(src); |
---|
| 1132 | } |
---|
| 1133 | |
---|
| 1134 | flags = TCL_ENCODING_START | TCL_ENCODING_END; |
---|
| 1135 | |
---|
| 1136 | while (1) { |
---|
| 1137 | result = (*encodingPtr->toUtfProc)(encodingPtr->clientData, src, |
---|
| 1138 | srcLen, flags, &state, dst, dstLen, &srcRead, &dstWrote, |
---|
| 1139 | &dstChars); |
---|
| 1140 | soFar = dst + dstWrote - Tcl_DStringValue(dstPtr); |
---|
| 1141 | |
---|
| 1142 | if (result != TCL_CONVERT_NOSPACE) { |
---|
| 1143 | Tcl_DStringSetLength(dstPtr, soFar); |
---|
| 1144 | return Tcl_DStringValue(dstPtr); |
---|
| 1145 | } |
---|
| 1146 | |
---|
| 1147 | flags &= ~TCL_ENCODING_START; |
---|
| 1148 | src += srcRead; |
---|
| 1149 | srcLen -= srcRead; |
---|
| 1150 | if (Tcl_DStringLength(dstPtr) == 0) { |
---|
| 1151 | Tcl_DStringSetLength(dstPtr, dstLen); |
---|
| 1152 | } |
---|
| 1153 | Tcl_DStringSetLength(dstPtr, 2 * Tcl_DStringLength(dstPtr) + 1); |
---|
| 1154 | dst = Tcl_DStringValue(dstPtr) + soFar; |
---|
| 1155 | dstLen = Tcl_DStringLength(dstPtr) - soFar - 1; |
---|
| 1156 | } |
---|
| 1157 | } |
---|
| 1158 | |
---|
| 1159 | /* |
---|
| 1160 | *------------------------------------------------------------------------- |
---|
| 1161 | * |
---|
| 1162 | * Tcl_ExternalToUtf -- |
---|
| 1163 | * |
---|
| 1164 | * Convert a source buffer from the specified encoding into UTF-8. |
---|
| 1165 | * |
---|
| 1166 | * Results: |
---|
| 1167 | * The return value is one of TCL_OK, TCL_CONVERT_MULTIBYTE, |
---|
| 1168 | * TCL_CONVERT_SYNTAX, TCL_CONVERT_UNKNOWN, or TCL_CONVERT_NOSPACE, as |
---|
| 1169 | * documented in tcl.h. |
---|
| 1170 | * |
---|
| 1171 | * Side effects: |
---|
| 1172 | * The converted bytes are stored in the output buffer. |
---|
| 1173 | * |
---|
| 1174 | *------------------------------------------------------------------------- |
---|
| 1175 | */ |
---|
| 1176 | |
---|
| 1177 | int |
---|
| 1178 | Tcl_ExternalToUtf( |
---|
| 1179 | Tcl_Interp *interp, /* Interp for error return, if not NULL. */ |
---|
| 1180 | Tcl_Encoding encoding, /* The encoding for the source string, or NULL |
---|
| 1181 | * for the default system encoding. */ |
---|
| 1182 | CONST char *src, /* Source string in specified encoding. */ |
---|
| 1183 | int srcLen, /* Source string length in bytes, or < 0 for |
---|
| 1184 | * encoding-specific string length. */ |
---|
| 1185 | int flags, /* Conversion control flags. */ |
---|
| 1186 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 1187 | * information used during a piecewise |
---|
| 1188 | * conversion. Contents of statePtr are |
---|
| 1189 | * initialized and/or reset by conversion |
---|
| 1190 | * routine under control of flags argument. */ |
---|
| 1191 | char *dst, /* Output buffer in which converted string is |
---|
| 1192 | * stored. */ |
---|
| 1193 | int dstLen, /* The maximum length of output buffer in |
---|
| 1194 | * bytes. */ |
---|
| 1195 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 1196 | * source string that were converted. This may |
---|
| 1197 | * be less than the original source length if |
---|
| 1198 | * there was a problem converting some source |
---|
| 1199 | * characters. */ |
---|
| 1200 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 1201 | * stored in the output buffer as a result of |
---|
| 1202 | * the conversion. */ |
---|
| 1203 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 1204 | * correspond to the bytes stored in the |
---|
| 1205 | * output buffer. */ |
---|
| 1206 | { |
---|
| 1207 | Encoding *encodingPtr; |
---|
| 1208 | int result, srcRead, dstWrote, dstChars; |
---|
| 1209 | Tcl_EncodingState state; |
---|
| 1210 | |
---|
| 1211 | if (encoding == NULL) { |
---|
| 1212 | encoding = systemEncoding; |
---|
| 1213 | } |
---|
| 1214 | encodingPtr = (Encoding *) encoding; |
---|
| 1215 | |
---|
| 1216 | if (src == NULL) { |
---|
| 1217 | srcLen = 0; |
---|
| 1218 | } else if (srcLen < 0) { |
---|
| 1219 | srcLen = (*encodingPtr->lengthProc)(src); |
---|
| 1220 | } |
---|
| 1221 | if (statePtr == NULL) { |
---|
| 1222 | flags |= TCL_ENCODING_START | TCL_ENCODING_END; |
---|
| 1223 | statePtr = &state; |
---|
| 1224 | } |
---|
| 1225 | if (srcReadPtr == NULL) { |
---|
| 1226 | srcReadPtr = &srcRead; |
---|
| 1227 | } |
---|
| 1228 | if (dstWrotePtr == NULL) { |
---|
| 1229 | dstWrotePtr = &dstWrote; |
---|
| 1230 | } |
---|
| 1231 | if (dstCharsPtr == NULL) { |
---|
| 1232 | dstCharsPtr = &dstChars; |
---|
| 1233 | } |
---|
| 1234 | |
---|
| 1235 | /* |
---|
| 1236 | * If there are any null characters in the middle of the buffer, they will |
---|
| 1237 | * converted to the UTF-8 null character (\xC080). To get the actual \0 at |
---|
| 1238 | * the end of the destination buffer, we need to append it manually. |
---|
| 1239 | */ |
---|
| 1240 | |
---|
| 1241 | dstLen--; |
---|
| 1242 | result = (*encodingPtr->toUtfProc)(encodingPtr->clientData, src, srcLen, |
---|
| 1243 | flags, statePtr, dst, dstLen, srcReadPtr, dstWrotePtr, |
---|
| 1244 | dstCharsPtr); |
---|
| 1245 | dst[*dstWrotePtr] = '\0'; |
---|
| 1246 | |
---|
| 1247 | return result; |
---|
| 1248 | } |
---|
| 1249 | |
---|
| 1250 | /* |
---|
| 1251 | *------------------------------------------------------------------------- |
---|
| 1252 | * |
---|
| 1253 | * Tcl_UtfToExternalDString -- |
---|
| 1254 | * |
---|
| 1255 | * Convert a source buffer from UTF-8 into the specified encoding. If any |
---|
| 1256 | * of the bytes in the source buffer are invalid or cannot be represented |
---|
| 1257 | * in the target encoding, a default fallback character will be |
---|
| 1258 | * substituted. |
---|
| 1259 | * |
---|
| 1260 | * Results: |
---|
| 1261 | * The converted bytes are stored in the DString, which is then NULL |
---|
| 1262 | * terminated in an encoding-specific manner. The return value is a |
---|
| 1263 | * pointer to the value stored in the DString. |
---|
| 1264 | * |
---|
| 1265 | * Side effects: |
---|
| 1266 | * None. |
---|
| 1267 | * |
---|
| 1268 | *------------------------------------------------------------------------- |
---|
| 1269 | */ |
---|
| 1270 | |
---|
| 1271 | char * |
---|
| 1272 | Tcl_UtfToExternalDString( |
---|
| 1273 | Tcl_Encoding encoding, /* The encoding for the converted string, or |
---|
| 1274 | * NULL for the default system encoding. */ |
---|
| 1275 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 1276 | int srcLen, /* Source string length in bytes, or < 0 for |
---|
| 1277 | * strlen(). */ |
---|
| 1278 | Tcl_DString *dstPtr) /* Uninitialized or free DString in which the |
---|
| 1279 | * converted string is stored. */ |
---|
| 1280 | { |
---|
| 1281 | char *dst; |
---|
| 1282 | Tcl_EncodingState state; |
---|
| 1283 | Encoding *encodingPtr; |
---|
| 1284 | int flags, dstLen, result, soFar, srcRead, dstWrote, dstChars; |
---|
| 1285 | |
---|
| 1286 | Tcl_DStringInit(dstPtr); |
---|
| 1287 | dst = Tcl_DStringValue(dstPtr); |
---|
| 1288 | dstLen = dstPtr->spaceAvl - 1; |
---|
| 1289 | |
---|
| 1290 | if (encoding == NULL) { |
---|
| 1291 | encoding = systemEncoding; |
---|
| 1292 | } |
---|
| 1293 | encodingPtr = (Encoding *) encoding; |
---|
| 1294 | |
---|
| 1295 | if (src == NULL) { |
---|
| 1296 | srcLen = 0; |
---|
| 1297 | } else if (srcLen < 0) { |
---|
| 1298 | srcLen = strlen(src); |
---|
| 1299 | } |
---|
| 1300 | flags = TCL_ENCODING_START | TCL_ENCODING_END; |
---|
| 1301 | while (1) { |
---|
| 1302 | result = (*encodingPtr->fromUtfProc)(encodingPtr->clientData, src, |
---|
| 1303 | srcLen, flags, &state, dst, dstLen, &srcRead, &dstWrote, |
---|
| 1304 | &dstChars); |
---|
| 1305 | soFar = dst + dstWrote - Tcl_DStringValue(dstPtr); |
---|
| 1306 | |
---|
| 1307 | if (result != TCL_CONVERT_NOSPACE) { |
---|
| 1308 | if (encodingPtr->nullSize == 2) { |
---|
| 1309 | Tcl_DStringSetLength(dstPtr, soFar + 1); |
---|
| 1310 | } |
---|
| 1311 | Tcl_DStringSetLength(dstPtr, soFar); |
---|
| 1312 | return Tcl_DStringValue(dstPtr); |
---|
| 1313 | } |
---|
| 1314 | |
---|
| 1315 | flags &= ~TCL_ENCODING_START; |
---|
| 1316 | src += srcRead; |
---|
| 1317 | srcLen -= srcRead; |
---|
| 1318 | if (Tcl_DStringLength(dstPtr) == 0) { |
---|
| 1319 | Tcl_DStringSetLength(dstPtr, dstLen); |
---|
| 1320 | } |
---|
| 1321 | Tcl_DStringSetLength(dstPtr, 2 * Tcl_DStringLength(dstPtr) + 1); |
---|
| 1322 | dst = Tcl_DStringValue(dstPtr) + soFar; |
---|
| 1323 | dstLen = Tcl_DStringLength(dstPtr) - soFar - 1; |
---|
| 1324 | } |
---|
| 1325 | } |
---|
| 1326 | |
---|
| 1327 | /* |
---|
| 1328 | *------------------------------------------------------------------------- |
---|
| 1329 | * |
---|
| 1330 | * Tcl_UtfToExternal -- |
---|
| 1331 | * |
---|
| 1332 | * Convert a buffer from UTF-8 into the specified encoding. |
---|
| 1333 | * |
---|
| 1334 | * Results: |
---|
| 1335 | * The return value is one of TCL_OK, TCL_CONVERT_MULTIBYTE, |
---|
| 1336 | * TCL_CONVERT_SYNTAX, TCL_CONVERT_UNKNOWN, or TCL_CONVERT_NOSPACE, as |
---|
| 1337 | * documented in tcl.h. |
---|
| 1338 | * |
---|
| 1339 | * Side effects: |
---|
| 1340 | * The converted bytes are stored in the output buffer. |
---|
| 1341 | * |
---|
| 1342 | *------------------------------------------------------------------------- |
---|
| 1343 | */ |
---|
| 1344 | |
---|
| 1345 | int |
---|
| 1346 | Tcl_UtfToExternal( |
---|
| 1347 | Tcl_Interp *interp, /* Interp for error return, if not NULL. */ |
---|
| 1348 | Tcl_Encoding encoding, /* The encoding for the converted string, or |
---|
| 1349 | * NULL for the default system encoding. */ |
---|
| 1350 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 1351 | int srcLen, /* Source string length in bytes, or < 0 for |
---|
| 1352 | * strlen(). */ |
---|
| 1353 | int flags, /* Conversion control flags. */ |
---|
| 1354 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 1355 | * information used during a piecewise |
---|
| 1356 | * conversion. Contents of statePtr are |
---|
| 1357 | * initialized and/or reset by conversion |
---|
| 1358 | * routine under control of flags argument. */ |
---|
| 1359 | char *dst, /* Output buffer in which converted string |
---|
| 1360 | * is stored. */ |
---|
| 1361 | int dstLen, /* The maximum length of output buffer in |
---|
| 1362 | * bytes. */ |
---|
| 1363 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 1364 | * source string that were converted. This may |
---|
| 1365 | * be less than the original source length if |
---|
| 1366 | * there was a problem converting some source |
---|
| 1367 | * characters. */ |
---|
| 1368 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 1369 | * stored in the output buffer as a result of |
---|
| 1370 | * the conversion. */ |
---|
| 1371 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 1372 | * correspond to the bytes stored in the |
---|
| 1373 | * output buffer. */ |
---|
| 1374 | { |
---|
| 1375 | Encoding *encodingPtr; |
---|
| 1376 | int result, srcRead, dstWrote, dstChars; |
---|
| 1377 | Tcl_EncodingState state; |
---|
| 1378 | |
---|
| 1379 | if (encoding == NULL) { |
---|
| 1380 | encoding = systemEncoding; |
---|
| 1381 | } |
---|
| 1382 | encodingPtr = (Encoding *) encoding; |
---|
| 1383 | |
---|
| 1384 | if (src == NULL) { |
---|
| 1385 | srcLen = 0; |
---|
| 1386 | } else if (srcLen < 0) { |
---|
| 1387 | srcLen = strlen(src); |
---|
| 1388 | } |
---|
| 1389 | if (statePtr == NULL) { |
---|
| 1390 | flags |= TCL_ENCODING_START | TCL_ENCODING_END; |
---|
| 1391 | statePtr = &state; |
---|
| 1392 | } |
---|
| 1393 | if (srcReadPtr == NULL) { |
---|
| 1394 | srcReadPtr = &srcRead; |
---|
| 1395 | } |
---|
| 1396 | if (dstWrotePtr == NULL) { |
---|
| 1397 | dstWrotePtr = &dstWrote; |
---|
| 1398 | } |
---|
| 1399 | if (dstCharsPtr == NULL) { |
---|
| 1400 | dstCharsPtr = &dstChars; |
---|
| 1401 | } |
---|
| 1402 | |
---|
| 1403 | dstLen -= encodingPtr->nullSize; |
---|
| 1404 | result = (*encodingPtr->fromUtfProc)(encodingPtr->clientData, src, srcLen, |
---|
| 1405 | flags, statePtr, dst, dstLen, srcReadPtr, dstWrotePtr, |
---|
| 1406 | dstCharsPtr); |
---|
| 1407 | if (encodingPtr->nullSize == 2) { |
---|
| 1408 | dst[*dstWrotePtr + 1] = '\0'; |
---|
| 1409 | } |
---|
| 1410 | dst[*dstWrotePtr] = '\0'; |
---|
| 1411 | |
---|
| 1412 | return result; |
---|
| 1413 | } |
---|
| 1414 | |
---|
| 1415 | /* |
---|
| 1416 | *--------------------------------------------------------------------------- |
---|
| 1417 | * |
---|
| 1418 | * Tcl_FindExecutable -- |
---|
| 1419 | * |
---|
| 1420 | * This function computes the absolute path name of the current |
---|
| 1421 | * application, given its argv[0] value. |
---|
| 1422 | * |
---|
| 1423 | * Results: |
---|
| 1424 | * None. |
---|
| 1425 | * |
---|
| 1426 | * Side effects: |
---|
| 1427 | * The absolute pathname for the application is computed and stored to be |
---|
| 1428 | * returned later be [info nameofexecutable]. |
---|
| 1429 | * |
---|
| 1430 | *--------------------------------------------------------------------------- |
---|
| 1431 | */ |
---|
| 1432 | |
---|
| 1433 | void |
---|
| 1434 | Tcl_FindExecutable( |
---|
| 1435 | CONST char *argv0) /* The value of the application's argv[0] |
---|
| 1436 | * (native). */ |
---|
| 1437 | { |
---|
| 1438 | TclInitSubsystems(); |
---|
| 1439 | TclpSetInitialEncodings(); |
---|
| 1440 | TclpFindExecutable(argv0); |
---|
| 1441 | } |
---|
| 1442 | |
---|
| 1443 | /* |
---|
| 1444 | *--------------------------------------------------------------------------- |
---|
| 1445 | * |
---|
| 1446 | * OpenEncodingFileChannel -- |
---|
| 1447 | * |
---|
| 1448 | * Open the file believed to hold data for the encoding, "name". |
---|
| 1449 | * |
---|
| 1450 | * Results: |
---|
| 1451 | * Returns the readable Tcl_Channel from opening the file, or NULL if the |
---|
| 1452 | * file could not be successfully opened. If NULL was returned, an error |
---|
| 1453 | * message is left in interp's result object, unless interp was NULL. |
---|
| 1454 | * |
---|
| 1455 | * Side effects: |
---|
| 1456 | * Channel may be opened. Information about the filesystem may be cached |
---|
| 1457 | * to speed later calls. |
---|
| 1458 | * |
---|
| 1459 | *--------------------------------------------------------------------------- |
---|
| 1460 | */ |
---|
| 1461 | |
---|
| 1462 | static Tcl_Channel |
---|
| 1463 | OpenEncodingFileChannel( |
---|
| 1464 | Tcl_Interp *interp, /* Interp for error reporting, if not NULL. */ |
---|
| 1465 | CONST char *name) /* The name of the encoding file on disk and |
---|
| 1466 | * also the name for new encoding. */ |
---|
| 1467 | { |
---|
| 1468 | Tcl_Obj *nameObj = Tcl_NewStringObj(name, -1); |
---|
| 1469 | Tcl_Obj *fileNameObj = Tcl_DuplicateObj(nameObj); |
---|
| 1470 | Tcl_Obj *searchPath = Tcl_DuplicateObj(Tcl_GetEncodingSearchPath()); |
---|
| 1471 | Tcl_Obj *map = TclGetProcessGlobalValue(&encodingFileMap); |
---|
| 1472 | Tcl_Obj **dir, *path, *directory = NULL; |
---|
| 1473 | Tcl_Channel chan = NULL; |
---|
| 1474 | int i, numDirs; |
---|
| 1475 | |
---|
| 1476 | Tcl_ListObjGetElements(NULL, searchPath, &numDirs, &dir); |
---|
| 1477 | Tcl_IncrRefCount(nameObj); |
---|
| 1478 | Tcl_AppendToObj(fileNameObj, ".enc", -1); |
---|
| 1479 | Tcl_IncrRefCount(fileNameObj); |
---|
| 1480 | Tcl_DictObjGet(NULL, map, nameObj, &directory); |
---|
| 1481 | |
---|
| 1482 | /* |
---|
| 1483 | * Check that any cached directory is still on the encoding search path. |
---|
| 1484 | */ |
---|
| 1485 | |
---|
| 1486 | if (NULL != directory) { |
---|
| 1487 | int verified = 0; |
---|
| 1488 | |
---|
| 1489 | for (i=0; i<numDirs && !verified; i++) { |
---|
| 1490 | if (dir[i] == directory) { |
---|
| 1491 | verified = 1; |
---|
| 1492 | } |
---|
| 1493 | } |
---|
| 1494 | if (!verified) { |
---|
| 1495 | CONST char *dirString = Tcl_GetString(directory); |
---|
| 1496 | for (i=0; i<numDirs && !verified; i++) { |
---|
| 1497 | if (strcmp(dirString, Tcl_GetString(dir[i])) == 0) { |
---|
| 1498 | verified = 1; |
---|
| 1499 | } |
---|
| 1500 | } |
---|
| 1501 | } |
---|
| 1502 | if (!verified) { |
---|
| 1503 | /* |
---|
| 1504 | * Directory no longer on the search path. Remove from cache. |
---|
| 1505 | */ |
---|
| 1506 | |
---|
| 1507 | map = Tcl_DuplicateObj(map); |
---|
| 1508 | Tcl_DictObjRemove(NULL, map, nameObj); |
---|
| 1509 | TclSetProcessGlobalValue(&encodingFileMap, map, NULL); |
---|
| 1510 | directory = NULL; |
---|
| 1511 | } |
---|
| 1512 | } |
---|
| 1513 | |
---|
| 1514 | if (NULL != directory) { |
---|
| 1515 | /* |
---|
| 1516 | * Got a directory from the cache. Try to use it first. |
---|
| 1517 | */ |
---|
| 1518 | |
---|
| 1519 | Tcl_IncrRefCount(directory); |
---|
| 1520 | path = Tcl_FSJoinToPath(directory, 1, &fileNameObj); |
---|
| 1521 | Tcl_IncrRefCount(path); |
---|
| 1522 | Tcl_DecrRefCount(directory); |
---|
| 1523 | chan = Tcl_FSOpenFileChannel(NULL, path, "r", 0); |
---|
| 1524 | Tcl_DecrRefCount(path); |
---|
| 1525 | } |
---|
| 1526 | |
---|
| 1527 | /* |
---|
| 1528 | * Scan the search path until we find it. |
---|
| 1529 | */ |
---|
| 1530 | |
---|
| 1531 | for (i=0; i<numDirs && (chan == NULL); i++) { |
---|
| 1532 | path = Tcl_FSJoinToPath(dir[i], 1, &fileNameObj); |
---|
| 1533 | Tcl_IncrRefCount(path); |
---|
| 1534 | chan = Tcl_FSOpenFileChannel(NULL, path, "r", 0); |
---|
| 1535 | Tcl_DecrRefCount(path); |
---|
| 1536 | if (chan != NULL) { |
---|
| 1537 | /* |
---|
| 1538 | * Save directory in the cache. |
---|
| 1539 | */ |
---|
| 1540 | |
---|
| 1541 | map = Tcl_DuplicateObj(TclGetProcessGlobalValue(&encodingFileMap)); |
---|
| 1542 | Tcl_DictObjPut(NULL, map, nameObj, dir[i]); |
---|
| 1543 | TclSetProcessGlobalValue(&encodingFileMap, map, NULL); |
---|
| 1544 | } |
---|
| 1545 | } |
---|
| 1546 | |
---|
| 1547 | if ((NULL == chan) && (interp != NULL)) { |
---|
| 1548 | Tcl_AppendResult(interp, "unknown encoding \"", name, "\"", NULL); |
---|
| 1549 | Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ENCODING", name, NULL); |
---|
| 1550 | } |
---|
| 1551 | Tcl_DecrRefCount(fileNameObj); |
---|
| 1552 | Tcl_DecrRefCount(nameObj); |
---|
| 1553 | Tcl_DecrRefCount(searchPath); |
---|
| 1554 | |
---|
| 1555 | return chan; |
---|
| 1556 | } |
---|
| 1557 | |
---|
| 1558 | /* |
---|
| 1559 | *--------------------------------------------------------------------------- |
---|
| 1560 | * |
---|
| 1561 | * LoadEncodingFile -- |
---|
| 1562 | * |
---|
| 1563 | * Read a file that describes an encoding and create a new Encoding from |
---|
| 1564 | * the data. |
---|
| 1565 | * |
---|
| 1566 | * Results: |
---|
| 1567 | * The return value is the newly loaded Encoding, or NULL if the file |
---|
| 1568 | * didn't exist of was in the incorrect format. If NULL was returned, an |
---|
| 1569 | * error message is left in interp's result object, unless interp was |
---|
| 1570 | * NULL. |
---|
| 1571 | * |
---|
| 1572 | * Side effects: |
---|
| 1573 | * File read from disk. |
---|
| 1574 | * |
---|
| 1575 | *--------------------------------------------------------------------------- |
---|
| 1576 | */ |
---|
| 1577 | |
---|
| 1578 | static Tcl_Encoding |
---|
| 1579 | LoadEncodingFile( |
---|
| 1580 | Tcl_Interp *interp, /* Interp for error reporting, if not NULL. */ |
---|
| 1581 | CONST char *name) /* The name of the encoding file on disk and |
---|
| 1582 | * also the name for new encoding. */ |
---|
| 1583 | { |
---|
| 1584 | Tcl_Channel chan = NULL; |
---|
| 1585 | Tcl_Encoding encoding = NULL; |
---|
| 1586 | int ch; |
---|
| 1587 | |
---|
| 1588 | chan = OpenEncodingFileChannel(interp, name); |
---|
| 1589 | if (chan == NULL) { |
---|
| 1590 | return NULL; |
---|
| 1591 | } |
---|
| 1592 | |
---|
| 1593 | Tcl_SetChannelOption(NULL, chan, "-encoding", "utf-8"); |
---|
| 1594 | |
---|
| 1595 | while (1) { |
---|
| 1596 | Tcl_DString ds; |
---|
| 1597 | |
---|
| 1598 | Tcl_DStringInit(&ds); |
---|
| 1599 | Tcl_Gets(chan, &ds); |
---|
| 1600 | ch = Tcl_DStringValue(&ds)[0]; |
---|
| 1601 | Tcl_DStringFree(&ds); |
---|
| 1602 | if (ch != '#') { |
---|
| 1603 | break; |
---|
| 1604 | } |
---|
| 1605 | } |
---|
| 1606 | |
---|
| 1607 | switch (ch) { |
---|
| 1608 | case 'S': |
---|
| 1609 | encoding = LoadTableEncoding(name, ENCODING_SINGLEBYTE, chan); |
---|
| 1610 | break; |
---|
| 1611 | case 'D': |
---|
| 1612 | encoding = LoadTableEncoding(name, ENCODING_DOUBLEBYTE, chan); |
---|
| 1613 | break; |
---|
| 1614 | case 'M': |
---|
| 1615 | encoding = LoadTableEncoding(name, ENCODING_MULTIBYTE, chan); |
---|
| 1616 | break; |
---|
| 1617 | case 'E': |
---|
| 1618 | encoding = LoadEscapeEncoding(name, chan); |
---|
| 1619 | break; |
---|
| 1620 | } |
---|
| 1621 | if ((encoding == NULL) && (interp != NULL)) { |
---|
| 1622 | Tcl_AppendResult(interp, "invalid encoding file \"", name, "\"", NULL); |
---|
| 1623 | } |
---|
| 1624 | Tcl_Close(NULL, chan); |
---|
| 1625 | |
---|
| 1626 | return encoding; |
---|
| 1627 | } |
---|
| 1628 | |
---|
| 1629 | /* |
---|
| 1630 | *------------------------------------------------------------------------- |
---|
| 1631 | * |
---|
| 1632 | * LoadTableEncoding -- |
---|
| 1633 | * |
---|
| 1634 | * Helper function for LoadEncodingTable(). Loads a table to that |
---|
| 1635 | * converts between Unicode and some other encoding and creates an |
---|
| 1636 | * encoding (using a TableEncoding structure) from that information. |
---|
| 1637 | * |
---|
| 1638 | * File contains binary data, but begins with a marker to indicate |
---|
| 1639 | * byte-ordering, so that same binary file can be read on either endian |
---|
| 1640 | * platforms. |
---|
| 1641 | * |
---|
| 1642 | * Results: |
---|
| 1643 | * The return value is the new encoding, or NULL if the encoding could |
---|
| 1644 | * not be created (because the file contained invalid data). |
---|
| 1645 | * |
---|
| 1646 | * Side effects: |
---|
| 1647 | * None. |
---|
| 1648 | * |
---|
| 1649 | *------------------------------------------------------------------------- |
---|
| 1650 | */ |
---|
| 1651 | |
---|
| 1652 | static Tcl_Encoding |
---|
| 1653 | LoadTableEncoding( |
---|
| 1654 | CONST char *name, /* Name for new encoding. */ |
---|
| 1655 | int type, /* Type of encoding (ENCODING_?????). */ |
---|
| 1656 | Tcl_Channel chan) /* File containing new encoding. */ |
---|
| 1657 | { |
---|
| 1658 | Tcl_DString lineString; |
---|
| 1659 | Tcl_Obj *objPtr; |
---|
| 1660 | char *line; |
---|
| 1661 | int i, hi, lo, numPages, symbol, fallback; |
---|
| 1662 | unsigned char used[256]; |
---|
| 1663 | unsigned int size; |
---|
| 1664 | TableEncodingData *dataPtr; |
---|
| 1665 | unsigned short *pageMemPtr; |
---|
| 1666 | Tcl_EncodingType encType; |
---|
| 1667 | |
---|
| 1668 | /* |
---|
| 1669 | * Speed over memory. Use a full 256 character table to decode hex |
---|
| 1670 | * sequences in the encoding files. |
---|
| 1671 | */ |
---|
| 1672 | |
---|
| 1673 | static char staticHex[] = { |
---|
| 1674 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0 ... 15 */ |
---|
| 1675 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 16 ... 31 */ |
---|
| 1676 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 32 ... 47 */ |
---|
| 1677 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 48 ... 63 */ |
---|
| 1678 | 0, 10, 11, 12, 13, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 64 ... 79 */ |
---|
| 1679 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 80 ... 95 */ |
---|
| 1680 | 0, 10, 11, 12, 13, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 96 ... 111 */ |
---|
| 1681 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 112 ... 127 */ |
---|
| 1682 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 128 ... 143 */ |
---|
| 1683 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 144 ... 159 */ |
---|
| 1684 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 160 ... 175 */ |
---|
| 1685 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 176 ... 191 */ |
---|
| 1686 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 192 ... 207 */ |
---|
| 1687 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 208 ... 223 */ |
---|
| 1688 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 224 ... 239 */ |
---|
| 1689 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 240 ... 255 */ |
---|
| 1690 | }; |
---|
| 1691 | |
---|
| 1692 | Tcl_DStringInit(&lineString); |
---|
| 1693 | Tcl_Gets(chan, &lineString); |
---|
| 1694 | line = Tcl_DStringValue(&lineString); |
---|
| 1695 | |
---|
| 1696 | fallback = (int) strtol(line, &line, 16); |
---|
| 1697 | symbol = (int) strtol(line, &line, 10); |
---|
| 1698 | numPages = (int) strtol(line, &line, 10); |
---|
| 1699 | Tcl_DStringFree(&lineString); |
---|
| 1700 | |
---|
| 1701 | if (numPages < 0) { |
---|
| 1702 | numPages = 0; |
---|
| 1703 | } else if (numPages > 256) { |
---|
| 1704 | numPages = 256; |
---|
| 1705 | } |
---|
| 1706 | |
---|
| 1707 | memset(used, 0, sizeof(used)); |
---|
| 1708 | |
---|
| 1709 | #undef PAGESIZE |
---|
| 1710 | #define PAGESIZE (256 * sizeof(unsigned short)) |
---|
| 1711 | |
---|
| 1712 | dataPtr = (TableEncodingData *) ckalloc(sizeof(TableEncodingData)); |
---|
| 1713 | memset(dataPtr, 0, sizeof(TableEncodingData)); |
---|
| 1714 | |
---|
| 1715 | dataPtr->fallback = fallback; |
---|
| 1716 | |
---|
| 1717 | /* |
---|
| 1718 | * Read the table that maps characters to Unicode. Performs a single |
---|
| 1719 | * malloc to get the memory for the array and all the pages needed by the |
---|
| 1720 | * array. |
---|
| 1721 | */ |
---|
| 1722 | |
---|
| 1723 | size = 256 * sizeof(unsigned short *) + numPages * PAGESIZE; |
---|
| 1724 | dataPtr->toUnicode = (unsigned short **) ckalloc(size); |
---|
| 1725 | memset(dataPtr->toUnicode, 0, size); |
---|
| 1726 | pageMemPtr = (unsigned short *) (dataPtr->toUnicode + 256); |
---|
| 1727 | |
---|
| 1728 | TclNewObj(objPtr); |
---|
| 1729 | Tcl_IncrRefCount(objPtr); |
---|
| 1730 | for (i = 0; i < numPages; i++) { |
---|
| 1731 | int ch; |
---|
| 1732 | char *p; |
---|
| 1733 | |
---|
| 1734 | Tcl_ReadChars(chan, objPtr, 3 + 16 * (16 * 4 + 1), 0); |
---|
| 1735 | p = Tcl_GetString(objPtr); |
---|
| 1736 | hi = (staticHex[UCHAR(p[0])] << 4) + staticHex[UCHAR(p[1])]; |
---|
| 1737 | dataPtr->toUnicode[hi] = pageMemPtr; |
---|
| 1738 | p += 2; |
---|
| 1739 | for (lo = 0; lo < 256; lo++) { |
---|
| 1740 | if ((lo & 0x0f) == 0) { |
---|
| 1741 | p++; |
---|
| 1742 | } |
---|
| 1743 | ch = (staticHex[UCHAR(p[0])] << 12) + (staticHex[UCHAR(p[1])] << 8) |
---|
| 1744 | + (staticHex[UCHAR(p[2])] << 4) + staticHex[UCHAR(p[3])]; |
---|
| 1745 | if (ch != 0) { |
---|
| 1746 | used[ch >> 8] = 1; |
---|
| 1747 | } |
---|
| 1748 | *pageMemPtr = (unsigned short) ch; |
---|
| 1749 | pageMemPtr++; |
---|
| 1750 | p += 4; |
---|
| 1751 | } |
---|
| 1752 | } |
---|
| 1753 | TclDecrRefCount(objPtr); |
---|
| 1754 | |
---|
| 1755 | if (type == ENCODING_DOUBLEBYTE) { |
---|
| 1756 | memset(dataPtr->prefixBytes, 1, sizeof(dataPtr->prefixBytes)); |
---|
| 1757 | } else { |
---|
| 1758 | for (hi = 1; hi < 256; hi++) { |
---|
| 1759 | if (dataPtr->toUnicode[hi] != NULL) { |
---|
| 1760 | dataPtr->prefixBytes[hi] = 1; |
---|
| 1761 | } |
---|
| 1762 | } |
---|
| 1763 | } |
---|
| 1764 | |
---|
| 1765 | /* |
---|
| 1766 | * Invert toUnicode array to produce the fromUnicode array. Performs a |
---|
| 1767 | * single malloc to get the memory for the array and all the pages needed |
---|
| 1768 | * by the array. While reading in the toUnicode array, we remembered what |
---|
| 1769 | * pages that would be needed for the fromUnicode array. |
---|
| 1770 | */ |
---|
| 1771 | |
---|
| 1772 | if (symbol) { |
---|
| 1773 | used[0] = 1; |
---|
| 1774 | } |
---|
| 1775 | numPages = 0; |
---|
| 1776 | for (hi = 0; hi < 256; hi++) { |
---|
| 1777 | if (used[hi]) { |
---|
| 1778 | numPages++; |
---|
| 1779 | } |
---|
| 1780 | } |
---|
| 1781 | size = 256 * sizeof(unsigned short *) + numPages * PAGESIZE; |
---|
| 1782 | dataPtr->fromUnicode = (unsigned short **) ckalloc(size); |
---|
| 1783 | memset(dataPtr->fromUnicode, 0, size); |
---|
| 1784 | pageMemPtr = (unsigned short *) (dataPtr->fromUnicode + 256); |
---|
| 1785 | |
---|
| 1786 | for (hi = 0; hi < 256; hi++) { |
---|
| 1787 | if (dataPtr->toUnicode[hi] == NULL) { |
---|
| 1788 | dataPtr->toUnicode[hi] = emptyPage; |
---|
| 1789 | } else { |
---|
| 1790 | for (lo = 0; lo < 256; lo++) { |
---|
| 1791 | int ch; |
---|
| 1792 | |
---|
| 1793 | ch = dataPtr->toUnicode[hi][lo]; |
---|
| 1794 | if (ch != 0) { |
---|
| 1795 | unsigned short *page; |
---|
| 1796 | |
---|
| 1797 | page = dataPtr->fromUnicode[ch >> 8]; |
---|
| 1798 | if (page == NULL) { |
---|
| 1799 | page = pageMemPtr; |
---|
| 1800 | pageMemPtr += 256; |
---|
| 1801 | dataPtr->fromUnicode[ch >> 8] = page; |
---|
| 1802 | } |
---|
| 1803 | page[ch & 0xff] = (unsigned short) ((hi << 8) + lo); |
---|
| 1804 | } |
---|
| 1805 | } |
---|
| 1806 | } |
---|
| 1807 | } |
---|
| 1808 | if (type == ENCODING_MULTIBYTE) { |
---|
| 1809 | /* |
---|
| 1810 | * If multibyte encodings don't have a backslash character, define |
---|
| 1811 | * one. Otherwise, on Windows, native file names won't work because |
---|
| 1812 | * the backslash in the file name will map to the unknown character |
---|
| 1813 | * (question mark) when converting from UTF-8 to external encoding. |
---|
| 1814 | */ |
---|
| 1815 | |
---|
| 1816 | if (dataPtr->fromUnicode[0] != NULL) { |
---|
| 1817 | if (dataPtr->fromUnicode[0]['\\'] == '\0') { |
---|
| 1818 | dataPtr->fromUnicode[0]['\\'] = '\\'; |
---|
| 1819 | } |
---|
| 1820 | } |
---|
| 1821 | } |
---|
| 1822 | if (symbol) { |
---|
| 1823 | unsigned short *page; |
---|
| 1824 | |
---|
| 1825 | /* |
---|
| 1826 | * Make a special symbol encoding that not only maps the symbol |
---|
| 1827 | * characters from their Unicode code points down into page 0, but |
---|
| 1828 | * also ensure that the characters on page 0 map to themselves. This |
---|
| 1829 | * is so that a symbol font can be used to display a simple string |
---|
| 1830 | * like "abcd" and have alpha, beta, chi, delta show up, rather than |
---|
| 1831 | * have "unknown" chars show up because strictly speaking the symbol |
---|
| 1832 | * font doesn't have glyphs for those low ascii chars. |
---|
| 1833 | */ |
---|
| 1834 | |
---|
| 1835 | page = dataPtr->fromUnicode[0]; |
---|
| 1836 | if (page == NULL) { |
---|
| 1837 | page = pageMemPtr; |
---|
| 1838 | dataPtr->fromUnicode[0] = page; |
---|
| 1839 | } |
---|
| 1840 | for (lo = 0; lo < 256; lo++) { |
---|
| 1841 | if (dataPtr->toUnicode[0][lo] != 0) { |
---|
| 1842 | page[lo] = (unsigned short) lo; |
---|
| 1843 | } |
---|
| 1844 | } |
---|
| 1845 | } |
---|
| 1846 | for (hi = 0; hi < 256; hi++) { |
---|
| 1847 | if (dataPtr->fromUnicode[hi] == NULL) { |
---|
| 1848 | dataPtr->fromUnicode[hi] = emptyPage; |
---|
| 1849 | } |
---|
| 1850 | } |
---|
| 1851 | |
---|
| 1852 | /* |
---|
| 1853 | * For trailing 'R'everse encoding, see [Patch 689341] |
---|
| 1854 | */ |
---|
| 1855 | |
---|
| 1856 | Tcl_DStringInit(&lineString); |
---|
| 1857 | do { |
---|
| 1858 | int len; |
---|
| 1859 | |
---|
| 1860 | /* |
---|
| 1861 | * Skip leading empty lines. |
---|
| 1862 | */ |
---|
| 1863 | |
---|
| 1864 | while ((len = Tcl_Gets(chan, &lineString)) == 0) { |
---|
| 1865 | /* empty body */ |
---|
| 1866 | } |
---|
| 1867 | |
---|
| 1868 | if (len < 0) { |
---|
| 1869 | break; |
---|
| 1870 | } |
---|
| 1871 | line = Tcl_DStringValue(&lineString); |
---|
| 1872 | if (line[0] != 'R') { |
---|
| 1873 | break; |
---|
| 1874 | } |
---|
| 1875 | for (Tcl_DStringSetLength(&lineString, 0); |
---|
| 1876 | (len = Tcl_Gets(chan, &lineString)) >= 0; |
---|
| 1877 | Tcl_DStringSetLength(&lineString, 0)) { |
---|
| 1878 | unsigned char* p; |
---|
| 1879 | int to, from; |
---|
| 1880 | |
---|
| 1881 | if (len < 5) { |
---|
| 1882 | continue; |
---|
| 1883 | } |
---|
| 1884 | p = (unsigned char*) Tcl_DStringValue(&lineString); |
---|
| 1885 | to = (staticHex[p[0]] << 12) + (staticHex[p[1]] << 8) |
---|
| 1886 | + (staticHex[p[2]] << 4) + staticHex[p[3]]; |
---|
| 1887 | if (to == 0) { |
---|
| 1888 | continue; |
---|
| 1889 | } |
---|
| 1890 | for (p += 5, len -= 5; len >= 0 && *p; p += 5, len -= 5) { |
---|
| 1891 | from = (staticHex[p[0]] << 12) + (staticHex[p[1]] << 8) |
---|
| 1892 | + (staticHex[p[2]] << 4) + staticHex[p[3]]; |
---|
| 1893 | if (from == 0) { |
---|
| 1894 | continue; |
---|
| 1895 | } |
---|
| 1896 | dataPtr->fromUnicode[from >> 8][from & 0xff] = to; |
---|
| 1897 | } |
---|
| 1898 | } |
---|
| 1899 | } while (0); |
---|
| 1900 | Tcl_DStringFree(&lineString); |
---|
| 1901 | |
---|
| 1902 | encType.encodingName = name; |
---|
| 1903 | encType.toUtfProc = TableToUtfProc; |
---|
| 1904 | encType.fromUtfProc = TableFromUtfProc; |
---|
| 1905 | encType.freeProc = TableFreeProc; |
---|
| 1906 | encType.nullSize = (type == ENCODING_DOUBLEBYTE) ? 2 : 1; |
---|
| 1907 | encType.clientData = (ClientData) dataPtr; |
---|
| 1908 | |
---|
| 1909 | return Tcl_CreateEncoding(&encType); |
---|
| 1910 | } |
---|
| 1911 | |
---|
| 1912 | /* |
---|
| 1913 | *------------------------------------------------------------------------- |
---|
| 1914 | * |
---|
| 1915 | * LoadEscapeEncoding -- |
---|
| 1916 | * |
---|
| 1917 | * Helper function for LoadEncodingTable(). Loads a state machine that |
---|
| 1918 | * converts between Unicode and some other encoding. |
---|
| 1919 | * |
---|
| 1920 | * File contains text data that describes the escape sequences that are |
---|
| 1921 | * used to choose an encoding and the associated names for the |
---|
| 1922 | * sub-encodings. |
---|
| 1923 | * |
---|
| 1924 | * Results: |
---|
| 1925 | * The return value is the new encoding, or NULL if the encoding could |
---|
| 1926 | * not be created (because the file contained invalid data). |
---|
| 1927 | * |
---|
| 1928 | * Side effects: |
---|
| 1929 | * None. |
---|
| 1930 | * |
---|
| 1931 | *------------------------------------------------------------------------- |
---|
| 1932 | */ |
---|
| 1933 | |
---|
| 1934 | static Tcl_Encoding |
---|
| 1935 | LoadEscapeEncoding( |
---|
| 1936 | CONST char *name, /* Name for new encoding. */ |
---|
| 1937 | Tcl_Channel chan) /* File containing new encoding. */ |
---|
| 1938 | { |
---|
| 1939 | int i; |
---|
| 1940 | unsigned int size; |
---|
| 1941 | Tcl_DString escapeData; |
---|
| 1942 | char init[16], final[16]; |
---|
| 1943 | EscapeEncodingData *dataPtr; |
---|
| 1944 | Tcl_EncodingType type; |
---|
| 1945 | |
---|
| 1946 | init[0] = '\0'; |
---|
| 1947 | final[0] = '\0'; |
---|
| 1948 | Tcl_DStringInit(&escapeData); |
---|
| 1949 | |
---|
| 1950 | while (1) { |
---|
| 1951 | int argc; |
---|
| 1952 | CONST char **argv; |
---|
| 1953 | char *line; |
---|
| 1954 | Tcl_DString lineString; |
---|
| 1955 | |
---|
| 1956 | Tcl_DStringInit(&lineString); |
---|
| 1957 | if (Tcl_Gets(chan, &lineString) < 0) { |
---|
| 1958 | break; |
---|
| 1959 | } |
---|
| 1960 | line = Tcl_DStringValue(&lineString); |
---|
| 1961 | if (Tcl_SplitList(NULL, line, &argc, &argv) != TCL_OK) { |
---|
| 1962 | continue; |
---|
| 1963 | } |
---|
| 1964 | if (argc >= 2) { |
---|
| 1965 | if (strcmp(argv[0], "name") == 0) { |
---|
| 1966 | /* do nothing */ |
---|
| 1967 | } else if (strcmp(argv[0], "init") == 0) { |
---|
| 1968 | strncpy(init, argv[1], sizeof(init)); |
---|
| 1969 | init[sizeof(init) - 1] = '\0'; |
---|
| 1970 | } else if (strcmp(argv[0], "final") == 0) { |
---|
| 1971 | strncpy(final, argv[1], sizeof(final)); |
---|
| 1972 | final[sizeof(final) - 1] = '\0'; |
---|
| 1973 | } else { |
---|
| 1974 | EscapeSubTable est; |
---|
| 1975 | Encoding *e; |
---|
| 1976 | |
---|
| 1977 | strncpy(est.sequence, argv[1], sizeof(est.sequence)); |
---|
| 1978 | est.sequence[sizeof(est.sequence) - 1] = '\0'; |
---|
| 1979 | est.sequenceLen = strlen(est.sequence); |
---|
| 1980 | |
---|
| 1981 | strncpy(est.name, argv[0], sizeof(est.name)); |
---|
| 1982 | est.name[sizeof(est.name) - 1] = '\0'; |
---|
| 1983 | |
---|
| 1984 | /* |
---|
| 1985 | * To avoid infinite recursion in [encoding system iso2022-*] |
---|
| 1986 | */ |
---|
| 1987 | |
---|
| 1988 | e = (Encoding *) Tcl_GetEncoding(NULL, est.name); |
---|
| 1989 | if (e && e->toUtfProc != TableToUtfProc && |
---|
| 1990 | e->toUtfProc != Iso88591ToUtfProc) { |
---|
| 1991 | Tcl_FreeEncoding((Tcl_Encoding) e); |
---|
| 1992 | e = NULL; |
---|
| 1993 | } |
---|
| 1994 | est.encodingPtr = e; |
---|
| 1995 | Tcl_DStringAppend(&escapeData, (char *) &est, sizeof(est)); |
---|
| 1996 | } |
---|
| 1997 | } |
---|
| 1998 | ckfree((char *) argv); |
---|
| 1999 | Tcl_DStringFree(&lineString); |
---|
| 2000 | } |
---|
| 2001 | |
---|
| 2002 | size = sizeof(EscapeEncodingData) - sizeof(EscapeSubTable) |
---|
| 2003 | + Tcl_DStringLength(&escapeData); |
---|
| 2004 | dataPtr = (EscapeEncodingData *) ckalloc(size); |
---|
| 2005 | dataPtr->initLen = strlen(init); |
---|
| 2006 | strcpy(dataPtr->init, init); |
---|
| 2007 | dataPtr->finalLen = strlen(final); |
---|
| 2008 | strcpy(dataPtr->final, final); |
---|
| 2009 | dataPtr->numSubTables = |
---|
| 2010 | Tcl_DStringLength(&escapeData) / sizeof(EscapeSubTable); |
---|
| 2011 | memcpy(dataPtr->subTables, Tcl_DStringValue(&escapeData), |
---|
| 2012 | (size_t) Tcl_DStringLength(&escapeData)); |
---|
| 2013 | Tcl_DStringFree(&escapeData); |
---|
| 2014 | |
---|
| 2015 | memset(dataPtr->prefixBytes, 0, sizeof(dataPtr->prefixBytes)); |
---|
| 2016 | for (i = 0; i < dataPtr->numSubTables; i++) { |
---|
| 2017 | dataPtr->prefixBytes[UCHAR(dataPtr->subTables[i].sequence[0])] = 1; |
---|
| 2018 | } |
---|
| 2019 | if (dataPtr->init[0] != '\0') { |
---|
| 2020 | dataPtr->prefixBytes[UCHAR(dataPtr->init[0])] = 1; |
---|
| 2021 | } |
---|
| 2022 | if (dataPtr->final[0] != '\0') { |
---|
| 2023 | dataPtr->prefixBytes[UCHAR(dataPtr->final[0])] = 1; |
---|
| 2024 | } |
---|
| 2025 | |
---|
| 2026 | type.encodingName = name; |
---|
| 2027 | type.toUtfProc = EscapeToUtfProc; |
---|
| 2028 | type.fromUtfProc = EscapeFromUtfProc; |
---|
| 2029 | type.freeProc = EscapeFreeProc; |
---|
| 2030 | type.nullSize = 1; |
---|
| 2031 | type.clientData = (ClientData) dataPtr; |
---|
| 2032 | |
---|
| 2033 | return Tcl_CreateEncoding(&type); |
---|
| 2034 | } |
---|
| 2035 | |
---|
| 2036 | /* |
---|
| 2037 | *------------------------------------------------------------------------- |
---|
| 2038 | * |
---|
| 2039 | * BinaryProc -- |
---|
| 2040 | * |
---|
| 2041 | * The default conversion when no other conversion is specified. No |
---|
| 2042 | * translation is done; source bytes are copied directly to destination |
---|
| 2043 | * bytes. |
---|
| 2044 | * |
---|
| 2045 | * Results: |
---|
| 2046 | * Returns TCL_OK if conversion was successful. |
---|
| 2047 | * |
---|
| 2048 | * Side effects: |
---|
| 2049 | * None. |
---|
| 2050 | * |
---|
| 2051 | *------------------------------------------------------------------------- |
---|
| 2052 | */ |
---|
| 2053 | |
---|
| 2054 | static int |
---|
| 2055 | BinaryProc( |
---|
| 2056 | ClientData clientData, /* Not used. */ |
---|
| 2057 | CONST char *src, /* Source string (unknown encoding). */ |
---|
| 2058 | int srcLen, /* Source string length in bytes. */ |
---|
| 2059 | int flags, /* Conversion control flags. */ |
---|
| 2060 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2061 | * information used during a piecewise |
---|
| 2062 | * conversion. Contents of statePtr are |
---|
| 2063 | * initialized and/or reset by conversion |
---|
| 2064 | * routine under control of flags argument. */ |
---|
| 2065 | char *dst, /* Output buffer in which converted string is |
---|
| 2066 | * stored. */ |
---|
| 2067 | int dstLen, /* The maximum length of output buffer in |
---|
| 2068 | * bytes. */ |
---|
| 2069 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2070 | * source string that were converted. */ |
---|
| 2071 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2072 | * stored in the output buffer as a result of |
---|
| 2073 | * the conversion. */ |
---|
| 2074 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2075 | * correspond to the bytes stored in the |
---|
| 2076 | * output buffer. */ |
---|
| 2077 | { |
---|
| 2078 | int result; |
---|
| 2079 | |
---|
| 2080 | result = TCL_OK; |
---|
| 2081 | dstLen -= TCL_UTF_MAX - 1; |
---|
| 2082 | if (dstLen < 0) { |
---|
| 2083 | dstLen = 0; |
---|
| 2084 | } |
---|
| 2085 | if (srcLen > dstLen) { |
---|
| 2086 | srcLen = dstLen; |
---|
| 2087 | result = TCL_CONVERT_NOSPACE; |
---|
| 2088 | } |
---|
| 2089 | |
---|
| 2090 | *srcReadPtr = srcLen; |
---|
| 2091 | *dstWrotePtr = srcLen; |
---|
| 2092 | *dstCharsPtr = srcLen; |
---|
| 2093 | memcpy(dst, src, (size_t) srcLen); |
---|
| 2094 | return result; |
---|
| 2095 | } |
---|
| 2096 | |
---|
| 2097 | /* |
---|
| 2098 | *------------------------------------------------------------------------- |
---|
| 2099 | * |
---|
| 2100 | * UtfExtToUtfIntProc -- |
---|
| 2101 | * |
---|
| 2102 | * Convert from UTF-8 to UTF-8. While converting null-bytes from the |
---|
| 2103 | * Tcl's internal representation (0xc0, 0x80) to the official |
---|
| 2104 | * representation (0x00). See UtfToUtfProc for details. |
---|
| 2105 | * |
---|
| 2106 | * Results: |
---|
| 2107 | * Returns TCL_OK if conversion was successful. |
---|
| 2108 | * |
---|
| 2109 | * Side effects: |
---|
| 2110 | * None. |
---|
| 2111 | * |
---|
| 2112 | *------------------------------------------------------------------------- |
---|
| 2113 | */ |
---|
| 2114 | |
---|
| 2115 | static int |
---|
| 2116 | UtfIntToUtfExtProc( |
---|
| 2117 | ClientData clientData, /* Not used. */ |
---|
| 2118 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 2119 | int srcLen, /* Source string length in bytes. */ |
---|
| 2120 | int flags, /* Conversion control flags. */ |
---|
| 2121 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2122 | * information used during a piecewise |
---|
| 2123 | * conversion. Contents of statePtr are |
---|
| 2124 | * initialized and/or reset by conversion |
---|
| 2125 | * routine under control of flags argument. */ |
---|
| 2126 | char *dst, /* Output buffer in which converted string |
---|
| 2127 | * is stored. */ |
---|
| 2128 | int dstLen, /* The maximum length of output buffer in |
---|
| 2129 | * bytes. */ |
---|
| 2130 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2131 | * source string that were converted. This may |
---|
| 2132 | * be less than the original source length if |
---|
| 2133 | * there was a problem converting some source |
---|
| 2134 | * characters. */ |
---|
| 2135 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2136 | * stored in the output buffer as a result of |
---|
| 2137 | * the conversion. */ |
---|
| 2138 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2139 | * correspond to the bytes stored in the |
---|
| 2140 | * output buffer. */ |
---|
| 2141 | { |
---|
| 2142 | return UtfToUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen, |
---|
| 2143 | srcReadPtr, dstWrotePtr, dstCharsPtr, 1); |
---|
| 2144 | } |
---|
| 2145 | |
---|
| 2146 | /* |
---|
| 2147 | *------------------------------------------------------------------------- |
---|
| 2148 | * |
---|
| 2149 | * UtfExtToUtfIntProc -- |
---|
| 2150 | * |
---|
| 2151 | * Convert from UTF-8 to UTF-8 while converting null-bytes from the |
---|
| 2152 | * official representation (0x00) to Tcl's internal representation (0xc0, |
---|
| 2153 | * 0x80). See UtfToUtfProc for details. |
---|
| 2154 | * |
---|
| 2155 | * Results: |
---|
| 2156 | * Returns TCL_OK if conversion was successful. |
---|
| 2157 | * |
---|
| 2158 | * Side effects: |
---|
| 2159 | * None. |
---|
| 2160 | * |
---|
| 2161 | *------------------------------------------------------------------------- |
---|
| 2162 | */ |
---|
| 2163 | static int |
---|
| 2164 | UtfExtToUtfIntProc( |
---|
| 2165 | ClientData clientData, /* Not used. */ |
---|
| 2166 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 2167 | int srcLen, /* Source string length in bytes. */ |
---|
| 2168 | int flags, /* Conversion control flags. */ |
---|
| 2169 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2170 | * information used during a piecewise |
---|
| 2171 | * conversion. Contents of statePtr are |
---|
| 2172 | * initialized and/or reset by conversion |
---|
| 2173 | * routine under control of flags argument. */ |
---|
| 2174 | char *dst, /* Output buffer in which converted string is |
---|
| 2175 | * stored. */ |
---|
| 2176 | int dstLen, /* The maximum length of output buffer in |
---|
| 2177 | * bytes. */ |
---|
| 2178 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2179 | * source string that were converted. This may |
---|
| 2180 | * be less than the original source length if |
---|
| 2181 | * there was a problem converting some source |
---|
| 2182 | * characters. */ |
---|
| 2183 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2184 | * stored in the output buffer as a result of |
---|
| 2185 | * the conversion. */ |
---|
| 2186 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2187 | * correspond to the bytes stored in the |
---|
| 2188 | * output buffer. */ |
---|
| 2189 | { |
---|
| 2190 | return UtfToUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen, |
---|
| 2191 | srcReadPtr, dstWrotePtr, dstCharsPtr, 0); |
---|
| 2192 | } |
---|
| 2193 | |
---|
| 2194 | /* |
---|
| 2195 | *------------------------------------------------------------------------- |
---|
| 2196 | * |
---|
| 2197 | * UtfToUtfProc -- |
---|
| 2198 | * |
---|
| 2199 | * Convert from UTF-8 to UTF-8. Note that the UTF-8 to UTF-8 translation |
---|
| 2200 | * is not a no-op, because it will turn a stream of improperly formed |
---|
| 2201 | * UTF-8 into a properly formed stream. |
---|
| 2202 | * |
---|
| 2203 | * Results: |
---|
| 2204 | * Returns TCL_OK if conversion was successful. |
---|
| 2205 | * |
---|
| 2206 | * Side effects: |
---|
| 2207 | * None. |
---|
| 2208 | * |
---|
| 2209 | *------------------------------------------------------------------------- |
---|
| 2210 | */ |
---|
| 2211 | |
---|
| 2212 | static int |
---|
| 2213 | UtfToUtfProc( |
---|
| 2214 | ClientData clientData, /* Not used. */ |
---|
| 2215 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 2216 | int srcLen, /* Source string length in bytes. */ |
---|
| 2217 | int flags, /* Conversion control flags. */ |
---|
| 2218 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2219 | * information used during a piecewise |
---|
| 2220 | * conversion. Contents of statePtr are |
---|
| 2221 | * initialized and/or reset by conversion |
---|
| 2222 | * routine under control of flags argument. */ |
---|
| 2223 | char *dst, /* Output buffer in which converted string is |
---|
| 2224 | * stored. */ |
---|
| 2225 | int dstLen, /* The maximum length of output buffer in |
---|
| 2226 | * bytes. */ |
---|
| 2227 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2228 | * source string that were converted. This may |
---|
| 2229 | * be less than the original source length if |
---|
| 2230 | * there was a problem converting some source |
---|
| 2231 | * characters. */ |
---|
| 2232 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2233 | * stored in the output buffer as a result of |
---|
| 2234 | * the conversion. */ |
---|
| 2235 | int *dstCharsPtr, /* Filled with the number of characters that |
---|
| 2236 | * correspond to the bytes stored in the |
---|
| 2237 | * output buffer. */ |
---|
| 2238 | int pureNullMode) /* Convert embedded nulls from internal |
---|
| 2239 | * representation to real null-bytes or vice |
---|
| 2240 | * versa. */ |
---|
| 2241 | { |
---|
| 2242 | CONST char *srcStart, *srcEnd, *srcClose; |
---|
| 2243 | char *dstStart, *dstEnd; |
---|
| 2244 | int result, numChars; |
---|
| 2245 | Tcl_UniChar ch; |
---|
| 2246 | |
---|
| 2247 | result = TCL_OK; |
---|
| 2248 | |
---|
| 2249 | srcStart = src; |
---|
| 2250 | srcEnd = src + srcLen; |
---|
| 2251 | srcClose = srcEnd; |
---|
| 2252 | if ((flags & TCL_ENCODING_END) == 0) { |
---|
| 2253 | srcClose -= TCL_UTF_MAX; |
---|
| 2254 | } |
---|
| 2255 | |
---|
| 2256 | dstStart = dst; |
---|
| 2257 | dstEnd = dst + dstLen - TCL_UTF_MAX; |
---|
| 2258 | |
---|
| 2259 | for (numChars = 0; src < srcEnd; numChars++) { |
---|
| 2260 | if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) { |
---|
| 2261 | /* |
---|
| 2262 | * If there is more string to follow, this will ensure that the |
---|
| 2263 | * last UTF-8 character in the source buffer hasn't been cut off. |
---|
| 2264 | */ |
---|
| 2265 | |
---|
| 2266 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 2267 | break; |
---|
| 2268 | } |
---|
| 2269 | if (dst > dstEnd) { |
---|
| 2270 | result = TCL_CONVERT_NOSPACE; |
---|
| 2271 | break; |
---|
| 2272 | } |
---|
| 2273 | if (UCHAR(*src) < 0x80 && !(UCHAR(*src) == 0 && pureNullMode == 0)) { |
---|
| 2274 | /* |
---|
| 2275 | * Copy 7bit chatacters, but skip null-bytes when we are in input |
---|
| 2276 | * mode, so that they get converted to 0xc080. |
---|
| 2277 | */ |
---|
| 2278 | |
---|
| 2279 | *dst++ = *src++; |
---|
| 2280 | } else if (pureNullMode == 1 && UCHAR(*src) == 0xc0 && |
---|
| 2281 | UCHAR(*(src+1)) == 0x80) { |
---|
| 2282 | /* |
---|
| 2283 | * Convert 0xc080 to real nulls when we are in output mode. |
---|
| 2284 | */ |
---|
| 2285 | |
---|
| 2286 | *dst++ = 0; |
---|
| 2287 | src += 2; |
---|
| 2288 | } else if (!Tcl_UtfCharComplete(src, srcEnd - src)) { |
---|
| 2289 | /* |
---|
| 2290 | * Always check before using Tcl_UtfToUniChar. Not doing can so |
---|
| 2291 | * cause it run beyond the endof the buffer! If we happen such an |
---|
| 2292 | * incomplete char its byts are made to represent themselves. |
---|
| 2293 | */ |
---|
| 2294 | |
---|
| 2295 | ch = (Tcl_UniChar) *src; |
---|
| 2296 | src += 1; |
---|
| 2297 | dst += Tcl_UniCharToUtf(ch, dst); |
---|
| 2298 | } else { |
---|
| 2299 | src += Tcl_UtfToUniChar(src, &ch); |
---|
| 2300 | dst += Tcl_UniCharToUtf(ch, dst); |
---|
| 2301 | } |
---|
| 2302 | } |
---|
| 2303 | |
---|
| 2304 | *srcReadPtr = src - srcStart; |
---|
| 2305 | *dstWrotePtr = dst - dstStart; |
---|
| 2306 | *dstCharsPtr = numChars; |
---|
| 2307 | return result; |
---|
| 2308 | } |
---|
| 2309 | |
---|
| 2310 | /* |
---|
| 2311 | *------------------------------------------------------------------------- |
---|
| 2312 | * |
---|
| 2313 | * UnicodeToUtfProc -- |
---|
| 2314 | * |
---|
| 2315 | * Convert from Unicode to UTF-8. |
---|
| 2316 | * |
---|
| 2317 | * Results: |
---|
| 2318 | * Returns TCL_OK if conversion was successful. |
---|
| 2319 | * |
---|
| 2320 | * Side effects: |
---|
| 2321 | * None. |
---|
| 2322 | * |
---|
| 2323 | *------------------------------------------------------------------------- |
---|
| 2324 | */ |
---|
| 2325 | |
---|
| 2326 | static int |
---|
| 2327 | UnicodeToUtfProc( |
---|
| 2328 | ClientData clientData, /* Not used. */ |
---|
| 2329 | CONST char *src, /* Source string in Unicode. */ |
---|
| 2330 | int srcLen, /* Source string length in bytes. */ |
---|
| 2331 | int flags, /* Conversion control flags. */ |
---|
| 2332 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2333 | * information used during a piecewise |
---|
| 2334 | * conversion. Contents of statePtr are |
---|
| 2335 | * initialized and/or reset by conversion |
---|
| 2336 | * routine under control of flags argument. */ |
---|
| 2337 | char *dst, /* Output buffer in which converted string is |
---|
| 2338 | * stored. */ |
---|
| 2339 | int dstLen, /* The maximum length of output buffer in |
---|
| 2340 | * bytes. */ |
---|
| 2341 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2342 | * source string that were converted. This may |
---|
| 2343 | * be less than the original source length if |
---|
| 2344 | * there was a problem converting some source |
---|
| 2345 | * characters. */ |
---|
| 2346 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2347 | * stored in the output buffer as a result of |
---|
| 2348 | * the conversion. */ |
---|
| 2349 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2350 | * correspond to the bytes stored in the |
---|
| 2351 | * output buffer. */ |
---|
| 2352 | { |
---|
| 2353 | CONST char *srcStart, *srcEnd; |
---|
| 2354 | char *dstEnd, *dstStart; |
---|
| 2355 | int result, numChars; |
---|
| 2356 | Tcl_UniChar ch; |
---|
| 2357 | |
---|
| 2358 | result = TCL_OK; |
---|
| 2359 | if ((srcLen % sizeof(Tcl_UniChar)) != 0) { |
---|
| 2360 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 2361 | srcLen /= sizeof(Tcl_UniChar); |
---|
| 2362 | srcLen *= sizeof(Tcl_UniChar); |
---|
| 2363 | } |
---|
| 2364 | |
---|
| 2365 | srcStart = src; |
---|
| 2366 | srcEnd = src + srcLen; |
---|
| 2367 | |
---|
| 2368 | dstStart = dst; |
---|
| 2369 | dstEnd = dst + dstLen - TCL_UTF_MAX; |
---|
| 2370 | |
---|
| 2371 | for (numChars = 0; src < srcEnd; numChars++) { |
---|
| 2372 | if (dst > dstEnd) { |
---|
| 2373 | result = TCL_CONVERT_NOSPACE; |
---|
| 2374 | break; |
---|
| 2375 | } |
---|
| 2376 | /* |
---|
| 2377 | * Special case for 1-byte utf chars for speed. Make sure we |
---|
| 2378 | * work with Tcl_UniChar-size data. |
---|
| 2379 | */ |
---|
| 2380 | ch = *(Tcl_UniChar *)src; |
---|
| 2381 | if (ch && ch < 0x80) { |
---|
| 2382 | *dst++ = (ch & 0xFF); |
---|
| 2383 | } else { |
---|
| 2384 | dst += Tcl_UniCharToUtf(ch, dst); |
---|
| 2385 | } |
---|
| 2386 | src += sizeof(Tcl_UniChar); |
---|
| 2387 | } |
---|
| 2388 | |
---|
| 2389 | *srcReadPtr = src - srcStart; |
---|
| 2390 | *dstWrotePtr = dst - dstStart; |
---|
| 2391 | *dstCharsPtr = numChars; |
---|
| 2392 | return result; |
---|
| 2393 | } |
---|
| 2394 | |
---|
| 2395 | /* |
---|
| 2396 | *------------------------------------------------------------------------- |
---|
| 2397 | * |
---|
| 2398 | * UtfToUnicodeProc -- |
---|
| 2399 | * |
---|
| 2400 | * Convert from UTF-8 to Unicode. |
---|
| 2401 | * |
---|
| 2402 | * Results: |
---|
| 2403 | * Returns TCL_OK if conversion was successful. |
---|
| 2404 | * |
---|
| 2405 | * Side effects: |
---|
| 2406 | * None. |
---|
| 2407 | * |
---|
| 2408 | *------------------------------------------------------------------------- |
---|
| 2409 | */ |
---|
| 2410 | |
---|
| 2411 | static int |
---|
| 2412 | UtfToUnicodeProc( |
---|
| 2413 | ClientData clientData, /* TableEncodingData that specifies |
---|
| 2414 | * encoding. */ |
---|
| 2415 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 2416 | int srcLen, /* Source string length in bytes. */ |
---|
| 2417 | int flags, /* Conversion control flags. */ |
---|
| 2418 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2419 | * information used during a piecewise |
---|
| 2420 | * conversion. Contents of statePtr are |
---|
| 2421 | * initialized and/or reset by conversion |
---|
| 2422 | * routine under control of flags argument. */ |
---|
| 2423 | char *dst, /* Output buffer in which converted string is |
---|
| 2424 | * stored. */ |
---|
| 2425 | int dstLen, /* The maximum length of output buffer in |
---|
| 2426 | * bytes. */ |
---|
| 2427 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2428 | * source string that were converted. This may |
---|
| 2429 | * be less than the original source length if |
---|
| 2430 | * there was a problem converting some source |
---|
| 2431 | * characters. */ |
---|
| 2432 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2433 | * stored in the output buffer as a result of |
---|
| 2434 | * the conversion. */ |
---|
| 2435 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2436 | * correspond to the bytes stored in the |
---|
| 2437 | * output buffer. */ |
---|
| 2438 | { |
---|
| 2439 | CONST char *srcStart, *srcEnd, *srcClose, *dstStart, *dstEnd; |
---|
| 2440 | int result, numChars; |
---|
| 2441 | Tcl_UniChar ch; |
---|
| 2442 | |
---|
| 2443 | srcStart = src; |
---|
| 2444 | srcEnd = src + srcLen; |
---|
| 2445 | srcClose = srcEnd; |
---|
| 2446 | if ((flags & TCL_ENCODING_END) == 0) { |
---|
| 2447 | srcClose -= TCL_UTF_MAX; |
---|
| 2448 | } |
---|
| 2449 | |
---|
| 2450 | dstStart = dst; |
---|
| 2451 | dstEnd = dst + dstLen - sizeof(Tcl_UniChar); |
---|
| 2452 | |
---|
| 2453 | result = TCL_OK; |
---|
| 2454 | for (numChars = 0; src < srcEnd; numChars++) { |
---|
| 2455 | if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) { |
---|
| 2456 | /* |
---|
| 2457 | * If there is more string to follow, this will ensure that the |
---|
| 2458 | * last UTF-8 character in the source buffer hasn't been cut off. |
---|
| 2459 | */ |
---|
| 2460 | |
---|
| 2461 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 2462 | break; |
---|
| 2463 | } |
---|
| 2464 | if (dst > dstEnd) { |
---|
| 2465 | result = TCL_CONVERT_NOSPACE; |
---|
| 2466 | break; |
---|
| 2467 | } |
---|
| 2468 | src += TclUtfToUniChar(src, &ch); |
---|
| 2469 | /* |
---|
| 2470 | * Need to handle this in a way that won't cause misalignment |
---|
| 2471 | * by casting dst to a Tcl_UniChar. [Bug 1122671] |
---|
| 2472 | * XXX: This hard-codes the assumed size of Tcl_UniChar as 2. |
---|
| 2473 | */ |
---|
| 2474 | #ifdef WORDS_BIGENDIAN |
---|
| 2475 | *dst++ = (ch >> 8); |
---|
| 2476 | *dst++ = (ch & 0xFF); |
---|
| 2477 | #else |
---|
| 2478 | *dst++ = (ch & 0xFF); |
---|
| 2479 | *dst++ = (ch >> 8); |
---|
| 2480 | #endif |
---|
| 2481 | } |
---|
| 2482 | *srcReadPtr = src - srcStart; |
---|
| 2483 | *dstWrotePtr = dst - dstStart; |
---|
| 2484 | *dstCharsPtr = numChars; |
---|
| 2485 | return result; |
---|
| 2486 | } |
---|
| 2487 | |
---|
| 2488 | /* |
---|
| 2489 | *------------------------------------------------------------------------- |
---|
| 2490 | * |
---|
| 2491 | * TableToUtfProc -- |
---|
| 2492 | * |
---|
| 2493 | * Convert from the encoding specified by the TableEncodingData into |
---|
| 2494 | * UTF-8. |
---|
| 2495 | * |
---|
| 2496 | * Results: |
---|
| 2497 | * Returns TCL_OK if conversion was successful. |
---|
| 2498 | * |
---|
| 2499 | * Side effects: |
---|
| 2500 | * None. |
---|
| 2501 | * |
---|
| 2502 | *------------------------------------------------------------------------- |
---|
| 2503 | */ |
---|
| 2504 | |
---|
| 2505 | static int |
---|
| 2506 | TableToUtfProc( |
---|
| 2507 | ClientData clientData, /* TableEncodingData that specifies |
---|
| 2508 | * encoding. */ |
---|
| 2509 | CONST char *src, /* Source string in specified encoding. */ |
---|
| 2510 | int srcLen, /* Source string length in bytes. */ |
---|
| 2511 | int flags, /* Conversion control flags. */ |
---|
| 2512 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2513 | * information used during a piecewise |
---|
| 2514 | * conversion. Contents of statePtr are |
---|
| 2515 | * initialized and/or reset by conversion |
---|
| 2516 | * routine under control of flags argument. */ |
---|
| 2517 | char *dst, /* Output buffer in which converted string is |
---|
| 2518 | * stored. */ |
---|
| 2519 | int dstLen, /* The maximum length of output buffer in |
---|
| 2520 | * bytes. */ |
---|
| 2521 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2522 | * source string that were converted. This may |
---|
| 2523 | * be less than the original source length if |
---|
| 2524 | * there was a problem converting some source |
---|
| 2525 | * characters. */ |
---|
| 2526 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2527 | * stored in the output buffer as a result of |
---|
| 2528 | * the conversion. */ |
---|
| 2529 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2530 | * correspond to the bytes stored in the |
---|
| 2531 | * output buffer. */ |
---|
| 2532 | { |
---|
| 2533 | CONST char *srcStart, *srcEnd; |
---|
| 2534 | char *dstEnd, *dstStart, *prefixBytes; |
---|
| 2535 | int result, byte, numChars; |
---|
| 2536 | Tcl_UniChar ch; |
---|
| 2537 | unsigned short **toUnicode; |
---|
| 2538 | unsigned short *pageZero; |
---|
| 2539 | TableEncodingData *dataPtr; |
---|
| 2540 | |
---|
| 2541 | srcStart = src; |
---|
| 2542 | srcEnd = src + srcLen; |
---|
| 2543 | |
---|
| 2544 | dstStart = dst; |
---|
| 2545 | dstEnd = dst + dstLen - TCL_UTF_MAX; |
---|
| 2546 | |
---|
| 2547 | dataPtr = (TableEncodingData *) clientData; |
---|
| 2548 | toUnicode = dataPtr->toUnicode; |
---|
| 2549 | prefixBytes = dataPtr->prefixBytes; |
---|
| 2550 | pageZero = toUnicode[0]; |
---|
| 2551 | |
---|
| 2552 | result = TCL_OK; |
---|
| 2553 | for (numChars = 0; src < srcEnd; numChars++) { |
---|
| 2554 | if (dst > dstEnd) { |
---|
| 2555 | result = TCL_CONVERT_NOSPACE; |
---|
| 2556 | break; |
---|
| 2557 | } |
---|
| 2558 | byte = *((unsigned char *) src); |
---|
| 2559 | if (prefixBytes[byte]) { |
---|
| 2560 | src++; |
---|
| 2561 | if (src >= srcEnd) { |
---|
| 2562 | src--; |
---|
| 2563 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 2564 | break; |
---|
| 2565 | } |
---|
| 2566 | ch = toUnicode[byte][*((unsigned char *) src)]; |
---|
| 2567 | } else { |
---|
| 2568 | ch = pageZero[byte]; |
---|
| 2569 | } |
---|
| 2570 | if ((ch == 0) && (byte != 0)) { |
---|
| 2571 | if (flags & TCL_ENCODING_STOPONERROR) { |
---|
| 2572 | result = TCL_CONVERT_SYNTAX; |
---|
| 2573 | break; |
---|
| 2574 | } |
---|
| 2575 | if (prefixBytes[byte]) { |
---|
| 2576 | src--; |
---|
| 2577 | } |
---|
| 2578 | ch = (Tcl_UniChar) byte; |
---|
| 2579 | } |
---|
| 2580 | /* |
---|
| 2581 | * Special case for 1-byte utf chars for speed. |
---|
| 2582 | */ |
---|
| 2583 | if (ch && ch < 0x80) { |
---|
| 2584 | *dst++ = (char) ch; |
---|
| 2585 | } else { |
---|
| 2586 | dst += Tcl_UniCharToUtf(ch, dst); |
---|
| 2587 | } |
---|
| 2588 | src++; |
---|
| 2589 | } |
---|
| 2590 | |
---|
| 2591 | *srcReadPtr = src - srcStart; |
---|
| 2592 | *dstWrotePtr = dst - dstStart; |
---|
| 2593 | *dstCharsPtr = numChars; |
---|
| 2594 | return result; |
---|
| 2595 | } |
---|
| 2596 | |
---|
| 2597 | /* |
---|
| 2598 | *------------------------------------------------------------------------- |
---|
| 2599 | * |
---|
| 2600 | * TableFromUtfProc -- |
---|
| 2601 | * |
---|
| 2602 | * Convert from UTF-8 into the encoding specified by the |
---|
| 2603 | * TableEncodingData. |
---|
| 2604 | * |
---|
| 2605 | * Results: |
---|
| 2606 | * Returns TCL_OK if conversion was successful. |
---|
| 2607 | * |
---|
| 2608 | * Side effects: |
---|
| 2609 | * None. |
---|
| 2610 | * |
---|
| 2611 | *------------------------------------------------------------------------- |
---|
| 2612 | */ |
---|
| 2613 | |
---|
| 2614 | static int |
---|
| 2615 | TableFromUtfProc( |
---|
| 2616 | ClientData clientData, /* TableEncodingData that specifies |
---|
| 2617 | * encoding. */ |
---|
| 2618 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 2619 | int srcLen, /* Source string length in bytes. */ |
---|
| 2620 | int flags, /* Conversion control flags. */ |
---|
| 2621 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2622 | * information used during a piecewise |
---|
| 2623 | * conversion. Contents of statePtr are |
---|
| 2624 | * initialized and/or reset by conversion |
---|
| 2625 | * routine under control of flags argument. */ |
---|
| 2626 | char *dst, /* Output buffer in which converted string is |
---|
| 2627 | * stored. */ |
---|
| 2628 | int dstLen, /* The maximum length of output buffer in |
---|
| 2629 | * bytes. */ |
---|
| 2630 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2631 | * source string that were converted. This may |
---|
| 2632 | * be less than the original source length if |
---|
| 2633 | * there was a problem converting some source |
---|
| 2634 | * characters. */ |
---|
| 2635 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2636 | * stored in the output buffer as a result of |
---|
| 2637 | * the conversion. */ |
---|
| 2638 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2639 | * correspond to the bytes stored in the |
---|
| 2640 | * output buffer. */ |
---|
| 2641 | { |
---|
| 2642 | CONST char *srcStart, *srcEnd, *srcClose; |
---|
| 2643 | char *dstStart, *dstEnd, *prefixBytes; |
---|
| 2644 | Tcl_UniChar ch; |
---|
| 2645 | int result, len, word, numChars; |
---|
| 2646 | TableEncodingData *dataPtr; |
---|
| 2647 | unsigned short **fromUnicode; |
---|
| 2648 | |
---|
| 2649 | result = TCL_OK; |
---|
| 2650 | |
---|
| 2651 | dataPtr = (TableEncodingData *) clientData; |
---|
| 2652 | prefixBytes = dataPtr->prefixBytes; |
---|
| 2653 | fromUnicode = dataPtr->fromUnicode; |
---|
| 2654 | |
---|
| 2655 | srcStart = src; |
---|
| 2656 | srcEnd = src + srcLen; |
---|
| 2657 | srcClose = srcEnd; |
---|
| 2658 | if ((flags & TCL_ENCODING_END) == 0) { |
---|
| 2659 | srcClose -= TCL_UTF_MAX; |
---|
| 2660 | } |
---|
| 2661 | |
---|
| 2662 | dstStart = dst; |
---|
| 2663 | dstEnd = dst + dstLen - 1; |
---|
| 2664 | |
---|
| 2665 | for (numChars = 0; src < srcEnd; numChars++) { |
---|
| 2666 | if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) { |
---|
| 2667 | /* |
---|
| 2668 | * If there is more string to follow, this will ensure that the |
---|
| 2669 | * last UTF-8 character in the source buffer hasn't been cut off. |
---|
| 2670 | */ |
---|
| 2671 | |
---|
| 2672 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 2673 | break; |
---|
| 2674 | } |
---|
| 2675 | len = TclUtfToUniChar(src, &ch); |
---|
| 2676 | |
---|
| 2677 | #if TCL_UTF_MAX > 3 |
---|
| 2678 | /* |
---|
| 2679 | * This prevents a crash condition. More evaluation is required for |
---|
| 2680 | * full support of int Tcl_UniChar. [Bug 1004065] |
---|
| 2681 | */ |
---|
| 2682 | |
---|
| 2683 | if (ch & 0xffff0000) { |
---|
| 2684 | word = 0; |
---|
| 2685 | } else |
---|
| 2686 | #endif |
---|
| 2687 | word = fromUnicode[(ch >> 8)][ch & 0xff]; |
---|
| 2688 | |
---|
| 2689 | if ((word == 0) && (ch != 0)) { |
---|
| 2690 | if (flags & TCL_ENCODING_STOPONERROR) { |
---|
| 2691 | result = TCL_CONVERT_UNKNOWN; |
---|
| 2692 | break; |
---|
| 2693 | } |
---|
| 2694 | word = dataPtr->fallback; |
---|
| 2695 | } |
---|
| 2696 | if (prefixBytes[(word >> 8)] != 0) { |
---|
| 2697 | if (dst + 1 > dstEnd) { |
---|
| 2698 | result = TCL_CONVERT_NOSPACE; |
---|
| 2699 | break; |
---|
| 2700 | } |
---|
| 2701 | dst[0] = (char) (word >> 8); |
---|
| 2702 | dst[1] = (char) word; |
---|
| 2703 | dst += 2; |
---|
| 2704 | } else { |
---|
| 2705 | if (dst > dstEnd) { |
---|
| 2706 | result = TCL_CONVERT_NOSPACE; |
---|
| 2707 | break; |
---|
| 2708 | } |
---|
| 2709 | dst[0] = (char) word; |
---|
| 2710 | dst++; |
---|
| 2711 | } |
---|
| 2712 | src += len; |
---|
| 2713 | } |
---|
| 2714 | |
---|
| 2715 | *srcReadPtr = src - srcStart; |
---|
| 2716 | *dstWrotePtr = dst - dstStart; |
---|
| 2717 | *dstCharsPtr = numChars; |
---|
| 2718 | return result; |
---|
| 2719 | } |
---|
| 2720 | |
---|
| 2721 | /* |
---|
| 2722 | *------------------------------------------------------------------------- |
---|
| 2723 | * |
---|
| 2724 | * Iso88591ToUtfProc -- |
---|
| 2725 | * |
---|
| 2726 | * Convert from the "iso8859-1" encoding into UTF-8. |
---|
| 2727 | * |
---|
| 2728 | * Results: |
---|
| 2729 | * Returns TCL_OK if conversion was successful. |
---|
| 2730 | * |
---|
| 2731 | * Side effects: |
---|
| 2732 | * None. |
---|
| 2733 | * |
---|
| 2734 | *------------------------------------------------------------------------- |
---|
| 2735 | */ |
---|
| 2736 | |
---|
| 2737 | static int |
---|
| 2738 | Iso88591ToUtfProc( |
---|
| 2739 | ClientData clientData, /* Ignored. */ |
---|
| 2740 | CONST char *src, /* Source string in specified encoding. */ |
---|
| 2741 | int srcLen, /* Source string length in bytes. */ |
---|
| 2742 | int flags, /* Conversion control flags. */ |
---|
| 2743 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2744 | * information used during a piecewise |
---|
| 2745 | * conversion. Contents of statePtr are |
---|
| 2746 | * initialized and/or reset by conversion |
---|
| 2747 | * routine under control of flags argument. */ |
---|
| 2748 | char *dst, /* Output buffer in which converted string is |
---|
| 2749 | * stored. */ |
---|
| 2750 | int dstLen, /* The maximum length of output buffer in |
---|
| 2751 | * bytes. */ |
---|
| 2752 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2753 | * source string that were converted. This may |
---|
| 2754 | * be less than the original source length if |
---|
| 2755 | * there was a problem converting some source |
---|
| 2756 | * characters. */ |
---|
| 2757 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2758 | * stored in the output buffer as a result of |
---|
| 2759 | * the conversion. */ |
---|
| 2760 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2761 | * correspond to the bytes stored in the |
---|
| 2762 | * output buffer. */ |
---|
| 2763 | { |
---|
| 2764 | CONST char *srcStart, *srcEnd; |
---|
| 2765 | char *dstEnd, *dstStart; |
---|
| 2766 | int result, numChars; |
---|
| 2767 | |
---|
| 2768 | srcStart = src; |
---|
| 2769 | srcEnd = src + srcLen; |
---|
| 2770 | |
---|
| 2771 | dstStart = dst; |
---|
| 2772 | dstEnd = dst + dstLen - TCL_UTF_MAX; |
---|
| 2773 | |
---|
| 2774 | result = TCL_OK; |
---|
| 2775 | for (numChars = 0; src < srcEnd; numChars++) { |
---|
| 2776 | Tcl_UniChar ch; |
---|
| 2777 | |
---|
| 2778 | if (dst > dstEnd) { |
---|
| 2779 | result = TCL_CONVERT_NOSPACE; |
---|
| 2780 | break; |
---|
| 2781 | } |
---|
| 2782 | ch = (Tcl_UniChar) *((unsigned char *) src); |
---|
| 2783 | /* |
---|
| 2784 | * Special case for 1-byte utf chars for speed. |
---|
| 2785 | */ |
---|
| 2786 | if (ch && ch < 0x80) { |
---|
| 2787 | *dst++ = (char) ch; |
---|
| 2788 | } else { |
---|
| 2789 | dst += Tcl_UniCharToUtf(ch, dst); |
---|
| 2790 | } |
---|
| 2791 | src++; |
---|
| 2792 | } |
---|
| 2793 | |
---|
| 2794 | *srcReadPtr = src - srcStart; |
---|
| 2795 | *dstWrotePtr = dst - dstStart; |
---|
| 2796 | *dstCharsPtr = numChars; |
---|
| 2797 | return result; |
---|
| 2798 | } |
---|
| 2799 | |
---|
| 2800 | /* |
---|
| 2801 | *------------------------------------------------------------------------- |
---|
| 2802 | * |
---|
| 2803 | * Iso88591FromUtfProc -- |
---|
| 2804 | * |
---|
| 2805 | * Convert from UTF-8 into the encoding "iso8859-1". |
---|
| 2806 | * |
---|
| 2807 | * Results: |
---|
| 2808 | * Returns TCL_OK if conversion was successful. |
---|
| 2809 | * |
---|
| 2810 | * Side effects: |
---|
| 2811 | * None. |
---|
| 2812 | * |
---|
| 2813 | *------------------------------------------------------------------------- |
---|
| 2814 | */ |
---|
| 2815 | |
---|
| 2816 | static int |
---|
| 2817 | Iso88591FromUtfProc( |
---|
| 2818 | ClientData clientData, /* Ignored. */ |
---|
| 2819 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 2820 | int srcLen, /* Source string length in bytes. */ |
---|
| 2821 | int flags, /* Conversion control flags. */ |
---|
| 2822 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2823 | * information used during a piecewise |
---|
| 2824 | * conversion. Contents of statePtr are |
---|
| 2825 | * initialized and/or reset by conversion |
---|
| 2826 | * routine under control of flags argument. */ |
---|
| 2827 | char *dst, /* Output buffer in which converted string is |
---|
| 2828 | * stored. */ |
---|
| 2829 | int dstLen, /* The maximum length of output buffer in |
---|
| 2830 | * bytes. */ |
---|
| 2831 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2832 | * source string that were converted. This may |
---|
| 2833 | * be less than the original source length if |
---|
| 2834 | * there was a problem converting some source |
---|
| 2835 | * characters. */ |
---|
| 2836 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2837 | * stored in the output buffer as a result of |
---|
| 2838 | * the conversion. */ |
---|
| 2839 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2840 | * correspond to the bytes stored in the |
---|
| 2841 | * output buffer. */ |
---|
| 2842 | { |
---|
| 2843 | CONST char *srcStart, *srcEnd, *srcClose; |
---|
| 2844 | char *dstStart, *dstEnd; |
---|
| 2845 | int result, numChars; |
---|
| 2846 | |
---|
| 2847 | result = TCL_OK; |
---|
| 2848 | |
---|
| 2849 | srcStart = src; |
---|
| 2850 | srcEnd = src + srcLen; |
---|
| 2851 | srcClose = srcEnd; |
---|
| 2852 | if ((flags & TCL_ENCODING_END) == 0) { |
---|
| 2853 | srcClose -= TCL_UTF_MAX; |
---|
| 2854 | } |
---|
| 2855 | |
---|
| 2856 | dstStart = dst; |
---|
| 2857 | dstEnd = dst + dstLen - 1; |
---|
| 2858 | |
---|
| 2859 | for (numChars = 0; src < srcEnd; numChars++) { |
---|
| 2860 | Tcl_UniChar ch; |
---|
| 2861 | int len; |
---|
| 2862 | |
---|
| 2863 | if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) { |
---|
| 2864 | /* |
---|
| 2865 | * If there is more string to follow, this will ensure that the |
---|
| 2866 | * last UTF-8 character in the source buffer hasn't been cut off. |
---|
| 2867 | */ |
---|
| 2868 | |
---|
| 2869 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 2870 | break; |
---|
| 2871 | } |
---|
| 2872 | len = TclUtfToUniChar(src, &ch); |
---|
| 2873 | |
---|
| 2874 | /* |
---|
| 2875 | * Check for illegal characters. |
---|
| 2876 | */ |
---|
| 2877 | |
---|
| 2878 | if (ch > 0xff) { |
---|
| 2879 | if (flags & TCL_ENCODING_STOPONERROR) { |
---|
| 2880 | result = TCL_CONVERT_UNKNOWN; |
---|
| 2881 | break; |
---|
| 2882 | } |
---|
| 2883 | |
---|
| 2884 | /* |
---|
| 2885 | * Plunge on, using '?' as a fallback character. |
---|
| 2886 | */ |
---|
| 2887 | |
---|
| 2888 | ch = (Tcl_UniChar) '?'; |
---|
| 2889 | } |
---|
| 2890 | |
---|
| 2891 | if (dst > dstEnd) { |
---|
| 2892 | result = TCL_CONVERT_NOSPACE; |
---|
| 2893 | break; |
---|
| 2894 | } |
---|
| 2895 | *(dst++) = (char) ch; |
---|
| 2896 | src += len; |
---|
| 2897 | } |
---|
| 2898 | |
---|
| 2899 | *srcReadPtr = src - srcStart; |
---|
| 2900 | *dstWrotePtr = dst - dstStart; |
---|
| 2901 | *dstCharsPtr = numChars; |
---|
| 2902 | return result; |
---|
| 2903 | } |
---|
| 2904 | |
---|
| 2905 | /* |
---|
| 2906 | *--------------------------------------------------------------------------- |
---|
| 2907 | * |
---|
| 2908 | * TableFreeProc -- |
---|
| 2909 | * |
---|
| 2910 | * This function is invoked when an encoding is deleted. It deletes the |
---|
| 2911 | * memory used by the TableEncodingData. |
---|
| 2912 | * |
---|
| 2913 | * Results: |
---|
| 2914 | * None. |
---|
| 2915 | * |
---|
| 2916 | * Side effects: |
---|
| 2917 | * Memory freed. |
---|
| 2918 | * |
---|
| 2919 | *--------------------------------------------------------------------------- |
---|
| 2920 | */ |
---|
| 2921 | |
---|
| 2922 | static void |
---|
| 2923 | TableFreeProc( |
---|
| 2924 | ClientData clientData) /* TableEncodingData that specifies |
---|
| 2925 | * encoding. */ |
---|
| 2926 | { |
---|
| 2927 | TableEncodingData *dataPtr; |
---|
| 2928 | |
---|
| 2929 | /* |
---|
| 2930 | * Make sure we aren't freeing twice on shutdown. [Bug 219314] |
---|
| 2931 | */ |
---|
| 2932 | |
---|
| 2933 | dataPtr = (TableEncodingData *) clientData; |
---|
| 2934 | ckfree((char *) dataPtr->toUnicode); |
---|
| 2935 | ckfree((char *) dataPtr->fromUnicode); |
---|
| 2936 | ckfree((char *) dataPtr); |
---|
| 2937 | } |
---|
| 2938 | |
---|
| 2939 | /* |
---|
| 2940 | *------------------------------------------------------------------------- |
---|
| 2941 | * |
---|
| 2942 | * EscapeToUtfProc -- |
---|
| 2943 | * |
---|
| 2944 | * Convert from the encoding specified by the EscapeEncodingData into |
---|
| 2945 | * UTF-8. |
---|
| 2946 | * |
---|
| 2947 | * Results: |
---|
| 2948 | * Returns TCL_OK if conversion was successful. |
---|
| 2949 | * |
---|
| 2950 | * Side effects: |
---|
| 2951 | * None. |
---|
| 2952 | * |
---|
| 2953 | *------------------------------------------------------------------------- |
---|
| 2954 | */ |
---|
| 2955 | |
---|
| 2956 | static int |
---|
| 2957 | EscapeToUtfProc( |
---|
| 2958 | ClientData clientData, /* EscapeEncodingData that specifies |
---|
| 2959 | * encoding. */ |
---|
| 2960 | CONST char *src, /* Source string in specified encoding. */ |
---|
| 2961 | int srcLen, /* Source string length in bytes. */ |
---|
| 2962 | int flags, /* Conversion control flags. */ |
---|
| 2963 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 2964 | * information used during a piecewise |
---|
| 2965 | * conversion. Contents of statePtr are |
---|
| 2966 | * initialized and/or reset by conversion |
---|
| 2967 | * routine under control of flags argument. */ |
---|
| 2968 | char *dst, /* Output buffer in which converted string is |
---|
| 2969 | * stored. */ |
---|
| 2970 | int dstLen, /* The maximum length of output buffer in |
---|
| 2971 | * bytes. */ |
---|
| 2972 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 2973 | * source string that were converted. This may |
---|
| 2974 | * be less than the original source length if |
---|
| 2975 | * there was a problem converting some source |
---|
| 2976 | * characters. */ |
---|
| 2977 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 2978 | * stored in the output buffer as a result of |
---|
| 2979 | * the conversion. */ |
---|
| 2980 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 2981 | * correspond to the bytes stored in the |
---|
| 2982 | * output buffer. */ |
---|
| 2983 | { |
---|
| 2984 | EscapeEncodingData *dataPtr; |
---|
| 2985 | char *prefixBytes, *tablePrefixBytes; |
---|
| 2986 | unsigned short **tableToUnicode; |
---|
| 2987 | Encoding *encodingPtr; |
---|
| 2988 | int state, result, numChars; |
---|
| 2989 | CONST char *srcStart, *srcEnd; |
---|
| 2990 | char *dstStart, *dstEnd; |
---|
| 2991 | |
---|
| 2992 | result = TCL_OK; |
---|
| 2993 | |
---|
| 2994 | tablePrefixBytes = NULL; /* lint. */ |
---|
| 2995 | tableToUnicode = NULL; /* lint. */ |
---|
| 2996 | |
---|
| 2997 | dataPtr = (EscapeEncodingData *) clientData; |
---|
| 2998 | prefixBytes = dataPtr->prefixBytes; |
---|
| 2999 | encodingPtr = NULL; |
---|
| 3000 | |
---|
| 3001 | srcStart = src; |
---|
| 3002 | srcEnd = src + srcLen; |
---|
| 3003 | |
---|
| 3004 | dstStart = dst; |
---|
| 3005 | dstEnd = dst + dstLen - TCL_UTF_MAX; |
---|
| 3006 | |
---|
| 3007 | state = PTR2INT(*statePtr); |
---|
| 3008 | if (flags & TCL_ENCODING_START) { |
---|
| 3009 | state = 0; |
---|
| 3010 | } |
---|
| 3011 | |
---|
| 3012 | for (numChars = 0; src < srcEnd; ) { |
---|
| 3013 | int byte, hi, lo, ch; |
---|
| 3014 | |
---|
| 3015 | if (dst > dstEnd) { |
---|
| 3016 | result = TCL_CONVERT_NOSPACE; |
---|
| 3017 | break; |
---|
| 3018 | } |
---|
| 3019 | byte = *((unsigned char *) src); |
---|
| 3020 | if (prefixBytes[byte]) { |
---|
| 3021 | unsigned int left, len, longest; |
---|
| 3022 | int checked, i; |
---|
| 3023 | EscapeSubTable *subTablePtr; |
---|
| 3024 | |
---|
| 3025 | /* |
---|
| 3026 | * Saw the beginning of an escape sequence. |
---|
| 3027 | */ |
---|
| 3028 | |
---|
| 3029 | left = srcEnd - src; |
---|
| 3030 | len = dataPtr->initLen; |
---|
| 3031 | longest = len; |
---|
| 3032 | checked = 0; |
---|
| 3033 | |
---|
| 3034 | if (len <= left) { |
---|
| 3035 | checked++; |
---|
| 3036 | if ((len > 0) && (memcmp(src, dataPtr->init, len) == 0)) { |
---|
| 3037 | /* |
---|
| 3038 | * If we see initialization string, skip it, even if we're |
---|
| 3039 | * not at the beginning of the buffer. |
---|
| 3040 | */ |
---|
| 3041 | |
---|
| 3042 | src += len; |
---|
| 3043 | continue; |
---|
| 3044 | } |
---|
| 3045 | } |
---|
| 3046 | |
---|
| 3047 | len = dataPtr->finalLen; |
---|
| 3048 | if (len > longest) { |
---|
| 3049 | longest = len; |
---|
| 3050 | } |
---|
| 3051 | |
---|
| 3052 | if (len <= left) { |
---|
| 3053 | checked++; |
---|
| 3054 | if ((len > 0) && (memcmp(src, dataPtr->final, len) == 0)) { |
---|
| 3055 | /* |
---|
| 3056 | * If we see finalization string, skip it, even if we're |
---|
| 3057 | * not at the end of the buffer. |
---|
| 3058 | */ |
---|
| 3059 | |
---|
| 3060 | src += len; |
---|
| 3061 | continue; |
---|
| 3062 | } |
---|
| 3063 | } |
---|
| 3064 | |
---|
| 3065 | subTablePtr = dataPtr->subTables; |
---|
| 3066 | for (i = 0; i < dataPtr->numSubTables; i++) { |
---|
| 3067 | len = subTablePtr->sequenceLen; |
---|
| 3068 | if (len > longest) { |
---|
| 3069 | longest = len; |
---|
| 3070 | } |
---|
| 3071 | if (len <= left) { |
---|
| 3072 | checked++; |
---|
| 3073 | if ((len > 0) && |
---|
| 3074 | (memcmp(src, subTablePtr->sequence, len) == 0)) { |
---|
| 3075 | state = i; |
---|
| 3076 | encodingPtr = NULL; |
---|
| 3077 | subTablePtr = NULL; |
---|
| 3078 | src += len; |
---|
| 3079 | break; |
---|
| 3080 | } |
---|
| 3081 | } |
---|
| 3082 | subTablePtr++; |
---|
| 3083 | } |
---|
| 3084 | |
---|
| 3085 | if (subTablePtr == NULL) { |
---|
| 3086 | /* |
---|
| 3087 | * A match was found, the escape sequence was consumed, and |
---|
| 3088 | * the state was updated. |
---|
| 3089 | */ |
---|
| 3090 | |
---|
| 3091 | continue; |
---|
| 3092 | } |
---|
| 3093 | |
---|
| 3094 | /* |
---|
| 3095 | * We have a split-up or unrecognized escape sequence. If we |
---|
| 3096 | * checked all the sequences, then it's a syntax error, otherwise |
---|
| 3097 | * we need more bytes to determine a match. |
---|
| 3098 | */ |
---|
| 3099 | |
---|
| 3100 | if ((checked == dataPtr->numSubTables + 2) |
---|
| 3101 | || (flags & TCL_ENCODING_END)) { |
---|
| 3102 | if ((flags & TCL_ENCODING_STOPONERROR) == 0) { |
---|
| 3103 | /* |
---|
| 3104 | * Skip the unknown escape sequence. |
---|
| 3105 | */ |
---|
| 3106 | |
---|
| 3107 | src += longest; |
---|
| 3108 | continue; |
---|
| 3109 | } |
---|
| 3110 | result = TCL_CONVERT_SYNTAX; |
---|
| 3111 | } else { |
---|
| 3112 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 3113 | } |
---|
| 3114 | break; |
---|
| 3115 | } |
---|
| 3116 | |
---|
| 3117 | if (encodingPtr == NULL) { |
---|
| 3118 | TableEncodingData *tableDataPtr; |
---|
| 3119 | |
---|
| 3120 | encodingPtr = GetTableEncoding(dataPtr, state); |
---|
| 3121 | tableDataPtr = (TableEncodingData *) encodingPtr->clientData; |
---|
| 3122 | tablePrefixBytes = tableDataPtr->prefixBytes; |
---|
| 3123 | tableToUnicode = tableDataPtr->toUnicode; |
---|
| 3124 | } |
---|
| 3125 | |
---|
| 3126 | if (tablePrefixBytes[byte]) { |
---|
| 3127 | src++; |
---|
| 3128 | if (src >= srcEnd) { |
---|
| 3129 | src--; |
---|
| 3130 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 3131 | break; |
---|
| 3132 | } |
---|
| 3133 | hi = byte; |
---|
| 3134 | lo = *((unsigned char *) src); |
---|
| 3135 | } else { |
---|
| 3136 | hi = 0; |
---|
| 3137 | lo = byte; |
---|
| 3138 | } |
---|
| 3139 | |
---|
| 3140 | ch = tableToUnicode[hi][lo]; |
---|
| 3141 | dst += Tcl_UniCharToUtf(ch, dst); |
---|
| 3142 | src++; |
---|
| 3143 | numChars++; |
---|
| 3144 | } |
---|
| 3145 | |
---|
| 3146 | *statePtr = (Tcl_EncodingState) INT2PTR(state); |
---|
| 3147 | *srcReadPtr = src - srcStart; |
---|
| 3148 | *dstWrotePtr = dst - dstStart; |
---|
| 3149 | *dstCharsPtr = numChars; |
---|
| 3150 | return result; |
---|
| 3151 | } |
---|
| 3152 | |
---|
| 3153 | /* |
---|
| 3154 | *------------------------------------------------------------------------- |
---|
| 3155 | * |
---|
| 3156 | * EscapeFromUtfProc -- |
---|
| 3157 | * |
---|
| 3158 | * Convert from UTF-8 into the encoding specified by the |
---|
| 3159 | * EscapeEncodingData. |
---|
| 3160 | * |
---|
| 3161 | * Results: |
---|
| 3162 | * Returns TCL_OK if conversion was successful. |
---|
| 3163 | * |
---|
| 3164 | * Side effects: |
---|
| 3165 | * None. |
---|
| 3166 | * |
---|
| 3167 | *------------------------------------------------------------------------- |
---|
| 3168 | */ |
---|
| 3169 | |
---|
| 3170 | static int |
---|
| 3171 | EscapeFromUtfProc( |
---|
| 3172 | ClientData clientData, /* EscapeEncodingData that specifies |
---|
| 3173 | * encoding. */ |
---|
| 3174 | CONST char *src, /* Source string in UTF-8. */ |
---|
| 3175 | int srcLen, /* Source string length in bytes. */ |
---|
| 3176 | int flags, /* Conversion control flags. */ |
---|
| 3177 | Tcl_EncodingState *statePtr,/* Place for conversion routine to store state |
---|
| 3178 | * information used during a piecewise |
---|
| 3179 | * conversion. Contents of statePtr are |
---|
| 3180 | * initialized and/or reset by conversion |
---|
| 3181 | * routine under control of flags argument. */ |
---|
| 3182 | char *dst, /* Output buffer in which converted string is |
---|
| 3183 | * stored. */ |
---|
| 3184 | int dstLen, /* The maximum length of output buffer in |
---|
| 3185 | * bytes. */ |
---|
| 3186 | int *srcReadPtr, /* Filled with the number of bytes from the |
---|
| 3187 | * source string that were converted. This may |
---|
| 3188 | * be less than the original source length if |
---|
| 3189 | * there was a problem converting some source |
---|
| 3190 | * characters. */ |
---|
| 3191 | int *dstWrotePtr, /* Filled with the number of bytes that were |
---|
| 3192 | * stored in the output buffer as a result of |
---|
| 3193 | * the conversion. */ |
---|
| 3194 | int *dstCharsPtr) /* Filled with the number of characters that |
---|
| 3195 | * correspond to the bytes stored in the |
---|
| 3196 | * output buffer. */ |
---|
| 3197 | { |
---|
| 3198 | EscapeEncodingData *dataPtr; |
---|
| 3199 | Encoding *encodingPtr; |
---|
| 3200 | CONST char *srcStart, *srcEnd, *srcClose; |
---|
| 3201 | char *dstStart, *dstEnd; |
---|
| 3202 | int state, result, numChars; |
---|
| 3203 | TableEncodingData *tableDataPtr; |
---|
| 3204 | char *tablePrefixBytes; |
---|
| 3205 | unsigned short **tableFromUnicode; |
---|
| 3206 | |
---|
| 3207 | result = TCL_OK; |
---|
| 3208 | |
---|
| 3209 | dataPtr = (EscapeEncodingData *) clientData; |
---|
| 3210 | |
---|
| 3211 | srcStart = src; |
---|
| 3212 | srcEnd = src + srcLen; |
---|
| 3213 | srcClose = srcEnd; |
---|
| 3214 | if ((flags & TCL_ENCODING_END) == 0) { |
---|
| 3215 | srcClose -= TCL_UTF_MAX; |
---|
| 3216 | } |
---|
| 3217 | |
---|
| 3218 | dstStart = dst; |
---|
| 3219 | dstEnd = dst + dstLen - 1; |
---|
| 3220 | |
---|
| 3221 | /* |
---|
| 3222 | * RFC1468 states that the text starts in ASCII, and switches to Japanese |
---|
| 3223 | * characters, and that the text must end in ASCII. [Patch 474358] |
---|
| 3224 | */ |
---|
| 3225 | |
---|
| 3226 | if (flags & TCL_ENCODING_START) { |
---|
| 3227 | state = 0; |
---|
| 3228 | if ((dst + dataPtr->initLen) > dstEnd) { |
---|
| 3229 | *srcReadPtr = 0; |
---|
| 3230 | *dstWrotePtr = 0; |
---|
| 3231 | return TCL_CONVERT_NOSPACE; |
---|
| 3232 | } |
---|
| 3233 | memcpy(dst, dataPtr->init, (size_t)dataPtr->initLen); |
---|
| 3234 | dst += dataPtr->initLen; |
---|
| 3235 | } else { |
---|
| 3236 | state = PTR2INT(*statePtr); |
---|
| 3237 | } |
---|
| 3238 | |
---|
| 3239 | encodingPtr = GetTableEncoding(dataPtr, state); |
---|
| 3240 | tableDataPtr = (TableEncodingData *) encodingPtr->clientData; |
---|
| 3241 | tablePrefixBytes = tableDataPtr->prefixBytes; |
---|
| 3242 | tableFromUnicode = tableDataPtr->fromUnicode; |
---|
| 3243 | |
---|
| 3244 | for (numChars = 0; src < srcEnd; numChars++) { |
---|
| 3245 | unsigned int len; |
---|
| 3246 | int word; |
---|
| 3247 | Tcl_UniChar ch; |
---|
| 3248 | |
---|
| 3249 | if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) { |
---|
| 3250 | /* |
---|
| 3251 | * If there is more string to follow, this will ensure that the |
---|
| 3252 | * last UTF-8 character in the source buffer hasn't been cut off. |
---|
| 3253 | */ |
---|
| 3254 | |
---|
| 3255 | result = TCL_CONVERT_MULTIBYTE; |
---|
| 3256 | break; |
---|
| 3257 | } |
---|
| 3258 | len = TclUtfToUniChar(src, &ch); |
---|
| 3259 | word = tableFromUnicode[(ch >> 8)][ch & 0xff]; |
---|
| 3260 | |
---|
| 3261 | if ((word == 0) && (ch != 0)) { |
---|
| 3262 | int oldState; |
---|
| 3263 | EscapeSubTable *subTablePtr; |
---|
| 3264 | |
---|
| 3265 | oldState = state; |
---|
| 3266 | for (state = 0; state < dataPtr->numSubTables; state++) { |
---|
| 3267 | encodingPtr = GetTableEncoding(dataPtr, state); |
---|
| 3268 | tableDataPtr = (TableEncodingData *) encodingPtr->clientData; |
---|
| 3269 | word = tableDataPtr->fromUnicode[(ch >> 8)][ch & 0xff]; |
---|
| 3270 | if (word != 0) { |
---|
| 3271 | break; |
---|
| 3272 | } |
---|
| 3273 | } |
---|
| 3274 | |
---|
| 3275 | if (word == 0) { |
---|
| 3276 | state = oldState; |
---|
| 3277 | if (flags & TCL_ENCODING_STOPONERROR) { |
---|
| 3278 | result = TCL_CONVERT_UNKNOWN; |
---|
| 3279 | break; |
---|
| 3280 | } |
---|
| 3281 | encodingPtr = GetTableEncoding(dataPtr, state); |
---|
| 3282 | tableDataPtr = (TableEncodingData *) encodingPtr->clientData; |
---|
| 3283 | word = tableDataPtr->fallback; |
---|
| 3284 | } |
---|
| 3285 | |
---|
| 3286 | tablePrefixBytes = tableDataPtr->prefixBytes; |
---|
| 3287 | tableFromUnicode = tableDataPtr->fromUnicode; |
---|
| 3288 | |
---|
| 3289 | /* |
---|
| 3290 | * The state variable has the value of oldState when word is 0. |
---|
| 3291 | * In this case, the escape sequense should not be copied to dst |
---|
| 3292 | * because the current character set is not changed. |
---|
| 3293 | */ |
---|
| 3294 | |
---|
| 3295 | if (state != oldState) { |
---|
| 3296 | subTablePtr = &dataPtr->subTables[state]; |
---|
| 3297 | if ((dst + subTablePtr->sequenceLen) > dstEnd) { |
---|
| 3298 | /* |
---|
| 3299 | * If there is no space to write the escape sequence, the |
---|
| 3300 | * state variable must be changed to the value of oldState |
---|
| 3301 | * variable because this escape sequence must be written |
---|
| 3302 | * in the next conversion. |
---|
| 3303 | */ |
---|
| 3304 | |
---|
| 3305 | state = oldState; |
---|
| 3306 | result = TCL_CONVERT_NOSPACE; |
---|
| 3307 | break; |
---|
| 3308 | } |
---|
| 3309 | memcpy(dst, subTablePtr->sequence, |
---|
| 3310 | (size_t) subTablePtr->sequenceLen); |
---|
| 3311 | dst += subTablePtr->sequenceLen; |
---|
| 3312 | } |
---|
| 3313 | } |
---|
| 3314 | |
---|
| 3315 | if (tablePrefixBytes[(word >> 8)] != 0) { |
---|
| 3316 | if (dst + 1 > dstEnd) { |
---|
| 3317 | result = TCL_CONVERT_NOSPACE; |
---|
| 3318 | break; |
---|
| 3319 | } |
---|
| 3320 | dst[0] = (char) (word >> 8); |
---|
| 3321 | dst[1] = (char) word; |
---|
| 3322 | dst += 2; |
---|
| 3323 | } else { |
---|
| 3324 | if (dst > dstEnd) { |
---|
| 3325 | result = TCL_CONVERT_NOSPACE; |
---|
| 3326 | break; |
---|
| 3327 | } |
---|
| 3328 | dst[0] = (char) word; |
---|
| 3329 | dst++; |
---|
| 3330 | } |
---|
| 3331 | src += len; |
---|
| 3332 | } |
---|
| 3333 | |
---|
| 3334 | if ((result == TCL_OK) && (flags & TCL_ENCODING_END)) { |
---|
| 3335 | unsigned int len = dataPtr->subTables[0].sequenceLen; |
---|
| 3336 | /* |
---|
| 3337 | * Certain encodings like iso2022-jp need to write |
---|
| 3338 | * an escape sequence after all characters have |
---|
| 3339 | * been converted. This logic checks that enough |
---|
| 3340 | * room is available in the buffer for the escape bytes. |
---|
| 3341 | * The TCL_ENCODING_END flag is cleared after a final |
---|
| 3342 | * escape sequence has been added to the buffer so |
---|
| 3343 | * that another call to this method does not attempt |
---|
| 3344 | * to append escape bytes a second time. |
---|
| 3345 | */ |
---|
| 3346 | if ((dst + dataPtr->finalLen + (state?len:0)) > dstEnd) { |
---|
| 3347 | result = TCL_CONVERT_NOSPACE; |
---|
| 3348 | } else { |
---|
| 3349 | if (state) { |
---|
| 3350 | memcpy(dst, dataPtr->subTables[0].sequence, (size_t) len); |
---|
| 3351 | dst += len; |
---|
| 3352 | } |
---|
| 3353 | memcpy(dst, dataPtr->final, (size_t) dataPtr->finalLen); |
---|
| 3354 | dst += dataPtr->finalLen; |
---|
| 3355 | state &= ~TCL_ENCODING_END; |
---|
| 3356 | } |
---|
| 3357 | } |
---|
| 3358 | |
---|
| 3359 | *statePtr = (Tcl_EncodingState) INT2PTR(state); |
---|
| 3360 | *srcReadPtr = src - srcStart; |
---|
| 3361 | *dstWrotePtr = dst - dstStart; |
---|
| 3362 | *dstCharsPtr = numChars; |
---|
| 3363 | return result; |
---|
| 3364 | } |
---|
| 3365 | |
---|
| 3366 | /* |
---|
| 3367 | *--------------------------------------------------------------------------- |
---|
| 3368 | * |
---|
| 3369 | * EscapeFreeProc -- |
---|
| 3370 | * |
---|
| 3371 | * This function is invoked when an EscapeEncodingData encoding is |
---|
| 3372 | * deleted. It deletes the memory used by the encoding. |
---|
| 3373 | * |
---|
| 3374 | * Results: |
---|
| 3375 | * None. |
---|
| 3376 | * |
---|
| 3377 | * Side effects: |
---|
| 3378 | * Memory freed. |
---|
| 3379 | * |
---|
| 3380 | *--------------------------------------------------------------------------- |
---|
| 3381 | */ |
---|
| 3382 | |
---|
| 3383 | static void |
---|
| 3384 | EscapeFreeProc( |
---|
| 3385 | ClientData clientData) /* EscapeEncodingData that specifies |
---|
| 3386 | * encoding. */ |
---|
| 3387 | { |
---|
| 3388 | EscapeEncodingData *dataPtr; |
---|
| 3389 | EscapeSubTable *subTablePtr; |
---|
| 3390 | int i; |
---|
| 3391 | |
---|
| 3392 | dataPtr = (EscapeEncodingData *) clientData; |
---|
| 3393 | if (dataPtr == NULL) { |
---|
| 3394 | return; |
---|
| 3395 | } |
---|
| 3396 | subTablePtr = dataPtr->subTables; |
---|
| 3397 | for (i = 0; i < dataPtr->numSubTables; i++) { |
---|
| 3398 | FreeEncoding((Tcl_Encoding) subTablePtr->encodingPtr); |
---|
| 3399 | subTablePtr++; |
---|
| 3400 | } |
---|
| 3401 | ckfree((char *) dataPtr); |
---|
| 3402 | } |
---|
| 3403 | |
---|
| 3404 | /* |
---|
| 3405 | *--------------------------------------------------------------------------- |
---|
| 3406 | * |
---|
| 3407 | * GetTableEncoding -- |
---|
| 3408 | * |
---|
| 3409 | * Helper function for the EscapeEncodingData conversions. Gets the |
---|
| 3410 | * encoding (of type TextEncodingData) that represents the specified |
---|
| 3411 | * state. |
---|
| 3412 | * |
---|
| 3413 | * Results: |
---|
| 3414 | * The return value is the encoding. |
---|
| 3415 | * |
---|
| 3416 | * Side effects: |
---|
| 3417 | * If the encoding that represents the specified state has not already |
---|
| 3418 | * been used by this EscapeEncoding, it will be loaded and cached in the |
---|
| 3419 | * dataPtr. |
---|
| 3420 | * |
---|
| 3421 | *--------------------------------------------------------------------------- |
---|
| 3422 | */ |
---|
| 3423 | |
---|
| 3424 | static Encoding * |
---|
| 3425 | GetTableEncoding( |
---|
| 3426 | EscapeEncodingData *dataPtr,/* Contains names of encodings. */ |
---|
| 3427 | int state) /* Index in dataPtr of desired Encoding. */ |
---|
| 3428 | { |
---|
| 3429 | EscapeSubTable *subTablePtr; |
---|
| 3430 | Encoding *encodingPtr; |
---|
| 3431 | |
---|
| 3432 | subTablePtr = &dataPtr->subTables[state]; |
---|
| 3433 | encodingPtr = subTablePtr->encodingPtr; |
---|
| 3434 | |
---|
| 3435 | if (encodingPtr == NULL) { |
---|
| 3436 | encodingPtr = (Encoding *) Tcl_GetEncoding(NULL, subTablePtr->name); |
---|
| 3437 | if ((encodingPtr == NULL) |
---|
| 3438 | || (encodingPtr->toUtfProc != TableToUtfProc |
---|
| 3439 | && encodingPtr->toUtfProc != Iso88591ToUtfProc)) { |
---|
| 3440 | Tcl_Panic("EscapeToUtfProc: invalid sub table"); |
---|
| 3441 | } |
---|
| 3442 | subTablePtr->encodingPtr = encodingPtr; |
---|
| 3443 | } |
---|
| 3444 | |
---|
| 3445 | return encodingPtr; |
---|
| 3446 | } |
---|
| 3447 | |
---|
| 3448 | /* |
---|
| 3449 | *--------------------------------------------------------------------------- |
---|
| 3450 | * |
---|
| 3451 | * unilen -- |
---|
| 3452 | * |
---|
| 3453 | * A helper function for the Tcl_ExternalToUtf functions. This function |
---|
| 3454 | * is similar to strlen for double-byte characters: it returns the number |
---|
| 3455 | * of bytes in a 0x0000 terminated string. |
---|
| 3456 | * |
---|
| 3457 | * Results: |
---|
| 3458 | * As above. |
---|
| 3459 | * |
---|
| 3460 | * Side effects: |
---|
| 3461 | * None. |
---|
| 3462 | * |
---|
| 3463 | *--------------------------------------------------------------------------- |
---|
| 3464 | */ |
---|
| 3465 | |
---|
| 3466 | static size_t |
---|
| 3467 | unilen( |
---|
| 3468 | CONST char *src) |
---|
| 3469 | { |
---|
| 3470 | unsigned short *p; |
---|
| 3471 | |
---|
| 3472 | p = (unsigned short *) src; |
---|
| 3473 | while (*p != 0x0000) { |
---|
| 3474 | p++; |
---|
| 3475 | } |
---|
| 3476 | return (char *) p - src; |
---|
| 3477 | } |
---|
| 3478 | |
---|
| 3479 | /* |
---|
| 3480 | *------------------------------------------------------------------------- |
---|
| 3481 | * |
---|
| 3482 | * InitializeEncodingSearchPath -- |
---|
| 3483 | * |
---|
| 3484 | * This is the fallback routine that sets the default value of the |
---|
| 3485 | * encoding search path if the application has not set one via a call to |
---|
| 3486 | * Tcl_SetEncodingSearchPath() by the first time the search path is needed |
---|
| 3487 | * to load encoding data. |
---|
| 3488 | * |
---|
| 3489 | * The default encoding search path is produced by taking each directory |
---|
| 3490 | * in the library path, appending a subdirectory named "encoding", and if |
---|
| 3491 | * the resulting directory exists, adding it to the encoding search path. |
---|
| 3492 | * |
---|
| 3493 | * Results: |
---|
| 3494 | * None. |
---|
| 3495 | * |
---|
| 3496 | * Side effects: |
---|
| 3497 | * Sets the encoding search path to an initial value. |
---|
| 3498 | * |
---|
| 3499 | *------------------------------------------------------------------------- |
---|
| 3500 | */ |
---|
| 3501 | |
---|
| 3502 | static void |
---|
| 3503 | InitializeEncodingSearchPath( |
---|
| 3504 | char **valuePtr, |
---|
| 3505 | int *lengthPtr, |
---|
| 3506 | Tcl_Encoding *encodingPtr) |
---|
| 3507 | { |
---|
| 3508 | char *bytes; |
---|
| 3509 | int i, numDirs, numBytes; |
---|
| 3510 | Tcl_Obj *libPath, *encodingObj, *searchPath; |
---|
| 3511 | |
---|
| 3512 | TclNewLiteralStringObj(encodingObj, "encoding"); |
---|
| 3513 | TclNewObj(searchPath); |
---|
| 3514 | Tcl_IncrRefCount(encodingObj); |
---|
| 3515 | Tcl_IncrRefCount(searchPath); |
---|
| 3516 | libPath = TclGetLibraryPath(); |
---|
| 3517 | Tcl_IncrRefCount(libPath); |
---|
| 3518 | Tcl_ListObjLength(NULL, libPath, &numDirs); |
---|
| 3519 | |
---|
| 3520 | for (i = 0; i < numDirs; i++) { |
---|
| 3521 | Tcl_Obj *directory, *path; |
---|
| 3522 | Tcl_StatBuf stat; |
---|
| 3523 | |
---|
| 3524 | Tcl_ListObjIndex(NULL, libPath, i, &directory); |
---|
| 3525 | path = Tcl_FSJoinToPath(directory, 1, &encodingObj); |
---|
| 3526 | Tcl_IncrRefCount(path); |
---|
| 3527 | if ((0 == Tcl_FSStat(path, &stat)) && S_ISDIR(stat.st_mode)) { |
---|
| 3528 | Tcl_ListObjAppendElement(NULL, searchPath, path); |
---|
| 3529 | } |
---|
| 3530 | Tcl_DecrRefCount(path); |
---|
| 3531 | } |
---|
| 3532 | |
---|
| 3533 | Tcl_DecrRefCount(libPath); |
---|
| 3534 | Tcl_DecrRefCount(encodingObj); |
---|
| 3535 | *encodingPtr = libraryPath.encoding; |
---|
| 3536 | if (*encodingPtr) { |
---|
| 3537 | ((Encoding *)(*encodingPtr))->refCount++; |
---|
| 3538 | } |
---|
| 3539 | bytes = Tcl_GetStringFromObj(searchPath, &numBytes); |
---|
| 3540 | |
---|
| 3541 | *lengthPtr = numBytes; |
---|
| 3542 | *valuePtr = ckalloc((unsigned int) numBytes + 1); |
---|
| 3543 | memcpy(*valuePtr, bytes, (size_t) numBytes + 1); |
---|
| 3544 | Tcl_DecrRefCount(searchPath); |
---|
| 3545 | } |
---|
| 3546 | |
---|
| 3547 | /* |
---|
| 3548 | * Local Variables: |
---|
| 3549 | * mode: c |
---|
| 3550 | * c-basic-offset: 4 |
---|
| 3551 | * fill-column: 78 |
---|
| 3552 | * End: |
---|
| 3553 | */ |
---|
| 3554 | |
---|