3717 lines
105 KiB
C
3717 lines
105 KiB
C
/*
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||
* tclEncoding.c --
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*
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* Contains the implementation of the encoding conversion package.
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*
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* Copyright (c) 1996-1998 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution of
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* this file, and for a DISCLAIMER OF ALL WARRANTIES.
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||
*/
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#include "tclInt.h"
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||
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typedef size_t (LengthProc)(const char *src);
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/*
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* The following data structure represents an encoding, which describes how to
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* convert between various character sets and UTF-8.
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*/
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typedef struct {
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char *name; /* Name of encoding. Malloced because (1) hash
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* table entry that owns this encoding may be
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* freed prior to this encoding being freed,
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* (2) string passed in the Tcl_EncodingType
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* structure may not be persistent. */
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Tcl_EncodingConvertProc *toUtfProc;
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/* Function to convert from external encoding
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* into UTF-8. */
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Tcl_EncodingConvertProc *fromUtfProc;
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/* Function to convert from UTF-8 into
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* external encoding. */
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Tcl_EncodingFreeProc *freeProc;
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/* If non-NULL, function to call when this
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* encoding is deleted. */
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int nullSize; /* Number of 0x00 bytes that signify
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* end-of-string in this encoding. This number
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* is used to determine the source string
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* length when the srcLen argument is
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* negative. This number can be 1 or 2. */
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ClientData clientData; /* Arbitrary value associated with encoding
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* type. Passed to conversion functions. */
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LengthProc *lengthProc; /* Function to compute length of
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* null-terminated strings in this encoding.
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* If nullSize is 1, this is strlen; if
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* nullSize is 2, this is a function that
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* returns the number of bytes in a 0x0000
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* terminated string. */
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int refCount; /* Number of uses of this structure. */
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Tcl_HashEntry *hPtr; /* Hash table entry that owns this encoding. */
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} Encoding;
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/*
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* The following structure is the clientData for a dynamically-loaded,
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* table-driven encoding created by LoadTableEncoding(). It maps between
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* Unicode and a single-byte, double-byte, or multibyte (1 or 2 bytes only)
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* encoding.
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*/
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typedef struct {
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int fallback; /* Character (in this encoding) to substitute
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* when this encoding cannot represent a UTF-8
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* character. */
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char prefixBytes[256]; /* If a byte in the input stream is a lead
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* byte for a 2-byte sequence, the
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* corresponding entry in this array is 1,
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* otherwise it is 0. */
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unsigned short **toUnicode; /* Two dimensional sparse matrix to map
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* characters from the encoding to Unicode.
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* Each element of the toUnicode array points
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* to an array of 256 shorts. If there is no
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* corresponding character in Unicode, the
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* value in the matrix is 0x0000.
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* malloc'd. */
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unsigned short **fromUnicode;
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/* Two dimensional sparse matrix to map
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* characters from Unicode to the encoding.
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* Each element of the fromUnicode array
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* points to an array of 256 shorts. If there
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* is no corresponding character the encoding,
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* the value in the matrix is 0x0000.
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* malloc'd. */
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} TableEncodingData;
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/*
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* Each of the following structures is the clientData for a dynamically-loaded
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* escape-driven encoding that is itself comprised of other simpler encodings.
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* An example is "iso-2022-jp", which uses escape sequences to switch between
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* ascii, jis0208, jis0212, gb2312, and ksc5601. Note that "escape-driven"
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* does not necessarily mean that the ESCAPE character is the character used
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* for switching character sets.
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*/
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typedef struct {
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unsigned sequenceLen; /* Length of following string. */
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char sequence[16]; /* Escape code that marks this encoding. */
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char name[32]; /* Name for encoding. */
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Encoding *encodingPtr; /* Encoding loaded using above name, or NULL
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* if this sub-encoding has not been needed
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* yet. */
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} EscapeSubTable;
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typedef struct {
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int fallback; /* Character (in this encoding) to substitute
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* when this encoding cannot represent a UTF-8
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* character. */
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unsigned initLen; /* Length of following string. */
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char init[16]; /* String to emit or expect before first char
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* in conversion. */
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unsigned finalLen; /* Length of following string. */
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char final[16]; /* String to emit or expect after last char in
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* conversion. */
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char prefixBytes[256]; /* If a byte in the input stream is the first
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* character of one of the escape sequences in
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* the following array, the corresponding
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* entry in this array is 1, otherwise it is
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* 0. */
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int numSubTables; /* Length of following array. */
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EscapeSubTable subTables[TCLFLEXARRAY];/* Information about each EscapeSubTable used
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* by this encoding type. The actual size is
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* as large as necessary to hold all
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* EscapeSubTables. */
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} EscapeEncodingData;
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/*
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* Constants used when loading an encoding file to identify the type of the
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* file.
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*/
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#define ENCODING_SINGLEBYTE 0
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#define ENCODING_DOUBLEBYTE 1
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#define ENCODING_MULTIBYTE 2
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#define ENCODING_ESCAPE 3
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/*
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* A list of directories in which Tcl should look for *.enc files. This list
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* is shared by all threads. Access is governed by a mutex lock.
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*/
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static TclInitProcessGlobalValueProc InitializeEncodingSearchPath;
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static ProcessGlobalValue encodingSearchPath = {
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0, 0, NULL, NULL, InitializeEncodingSearchPath, NULL, NULL
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};
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/*
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* A map from encoding names to the directories in which their data files have
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* been seen. The string value of the map is shared by all threads. Access to
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* the shared string is governed by a mutex lock.
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*/
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static ProcessGlobalValue encodingFileMap = {
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0, 0, NULL, NULL, NULL, NULL, NULL
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};
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/*
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* A list of directories making up the "library path". Historically this
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* search path has served many uses, but the only one remaining is a base for
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* the encodingSearchPath above. If the application does not explicitly set
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* the encodingSearchPath, then it is initialized by appending /encoding
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* to each directory in this "libraryPath".
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*/
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static ProcessGlobalValue libraryPath = {
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0, 0, NULL, NULL, TclpInitLibraryPath, NULL, NULL
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};
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static int encodingsInitialized = 0;
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/*
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* Hash table that keeps track of all loaded Encodings. Keys are the string
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* names that represent the encoding, values are (Encoding *).
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*/
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static Tcl_HashTable encodingTable;
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TCL_DECLARE_MUTEX(encodingMutex)
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/*
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* The following are used to hold the default and current system encodings.
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* If NULL is passed to one of the conversion routines, the current setting of
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* the system encoding is used to perform the conversion.
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*/
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static Tcl_Encoding defaultEncoding = NULL;
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static Tcl_Encoding systemEncoding = NULL;
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Tcl_Encoding tclIdentityEncoding = NULL;
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/*
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* The following variable is used in the sparse matrix code for a
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* TableEncoding to represent a page in the table that has no entries.
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*/
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static unsigned short emptyPage[256];
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/*
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* Functions used only in this module.
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*/
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static Tcl_EncodingConvertProc BinaryProc;
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static Tcl_DupInternalRepProc DupEncodingInternalRep;
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static Tcl_EncodingFreeProc EscapeFreeProc;
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static Tcl_EncodingConvertProc EscapeFromUtfProc;
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static Tcl_EncodingConvertProc EscapeToUtfProc;
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static void FillEncodingFileMap(void);
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static void FreeEncoding(Tcl_Encoding encoding);
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static Tcl_FreeInternalRepProc FreeEncodingInternalRep;
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static Encoding * GetTableEncoding(EscapeEncodingData *dataPtr,
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int state);
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static Tcl_Encoding LoadEncodingFile(Tcl_Interp *interp,
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const char *name);
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static Tcl_Encoding LoadTableEncoding(const char *name, int type,
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Tcl_Channel chan);
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static Tcl_Encoding LoadEscapeEncoding(const char *name,
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Tcl_Channel chan);
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static Tcl_Channel OpenEncodingFileChannel(Tcl_Interp *interp,
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const char *name);
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static Tcl_EncodingFreeProc TableFreeProc;
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static int TableFromUtfProc(ClientData clientData,
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const char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr);
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static int TableToUtfProc(ClientData clientData, const char *src,
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int srcLen, int flags, Tcl_EncodingState *statePtr,
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char *dst, int dstLen, int *srcReadPtr,
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int *dstWrotePtr, int *dstCharsPtr);
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static size_t unilen(const char *src);
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static int UnicodeToUtfProc(ClientData clientData,
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const char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr);
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static int UtfToUnicodeProc(ClientData clientData,
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const char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr);
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static int UtfToUtfProc(ClientData clientData,
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const char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr, int pureNullMode);
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static int UtfIntToUtfExtProc(ClientData clientData,
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const char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr);
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static int UtfExtToUtfIntProc(ClientData clientData,
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const char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr);
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static int Iso88591FromUtfProc(ClientData clientData,
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const char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst, int dstLen,
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int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr);
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static int Iso88591ToUtfProc(ClientData clientData,
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const char *src, int srcLen, int flags,
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Tcl_EncodingState *statePtr, char *dst,
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int dstLen, int *srcReadPtr, int *dstWrotePtr,
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int *dstCharsPtr);
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/*
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* A Tcl_ObjType for holding a cached Tcl_Encoding in the twoPtrValue.ptr1 field
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* of the internalrep. This should help the lifetime of encodings be more useful.
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* See concerns raised in [Bug 1077262].
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*/
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static const Tcl_ObjType encodingType = {
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"encoding", FreeEncodingInternalRep, DupEncodingInternalRep, NULL, NULL
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};
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/*
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*----------------------------------------------------------------------
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*
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* Tcl_GetEncodingFromObj --
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*
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* Writes to (*encodingPtr) the Tcl_Encoding value of (*objPtr), if
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* possible, and returns TCL_OK. If no such encoding exists, TCL_ERROR is
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* returned, and if interp is non-NULL, an error message is written
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* there.
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*
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* Results:
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* Standard Tcl return code.
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*
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* Side effects:
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* Caches the Tcl_Encoding value as the internal rep of (*objPtr).
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*
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*----------------------------------------------------------------------
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*/
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int
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Tcl_GetEncodingFromObj(
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Tcl_Interp *interp,
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Tcl_Obj *objPtr,
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Tcl_Encoding *encodingPtr)
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{
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const char *name = TclGetString(objPtr);
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if (objPtr->typePtr != &encodingType) {
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Tcl_Encoding encoding = Tcl_GetEncoding(interp, name);
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if (encoding == NULL) {
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return TCL_ERROR;
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}
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TclFreeIntRep(objPtr);
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objPtr->internalRep.twoPtrValue.ptr1 = encoding;
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objPtr->typePtr = &encodingType;
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}
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*encodingPtr = Tcl_GetEncoding(NULL, name);
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* FreeEncodingInternalRep --
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*
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* The Tcl_FreeInternalRepProc for the "encoding" Tcl_ObjType.
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*
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*----------------------------------------------------------------------
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*/
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static void
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FreeEncodingInternalRep(
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Tcl_Obj *objPtr)
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{
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Tcl_FreeEncoding((Tcl_Encoding)objPtr->internalRep.twoPtrValue.ptr1);
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objPtr->typePtr = NULL;
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}
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/*
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*----------------------------------------------------------------------
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*
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* DupEncodingInternalRep --
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*
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* The Tcl_DupInternalRepProc for the "encoding" Tcl_ObjType.
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*
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*----------------------------------------------------------------------
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*/
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static void
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DupEncodingInternalRep(
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Tcl_Obj *srcPtr,
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Tcl_Obj *dupPtr)
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{
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dupPtr->internalRep.twoPtrValue.ptr1 = Tcl_GetEncoding(NULL, srcPtr->bytes);
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}
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/*
|
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*----------------------------------------------------------------------
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||
*
|
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* Tcl_GetEncodingSearchPath --
|
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*
|
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* Keeps the per-thread copy of the encoding search path current with
|
||
* changes to the global copy.
|
||
*
|
||
* Results:
|
||
* Returns a "list" (Tcl_Obj *) that contains the encoding search path.
|
||
*
|
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*----------------------------------------------------------------------
|
||
*/
|
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Tcl_Obj *
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Tcl_GetEncodingSearchPath(void)
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{
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return TclGetProcessGlobalValue(&encodingSearchPath);
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||
}
|
||
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/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_SetEncodingSearchPath --
|
||
*
|
||
* Keeps the per-thread copy of the encoding search path current with
|
||
* changes to the global copy.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
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||
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int
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Tcl_SetEncodingSearchPath(
|
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Tcl_Obj *searchPath)
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{
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int dummy;
|
||
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if (TCL_ERROR == Tcl_ListObjLength(NULL, searchPath, &dummy)) {
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||
return TCL_ERROR;
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||
}
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TclSetProcessGlobalValue(&encodingSearchPath, searchPath, NULL);
|
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return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclGetLibraryPath --
|
||
*
|
||
* Keeps the per-thread copy of the library path current with changes to
|
||
* the global copy.
|
||
*
|
||
* Results:
|
||
* Returns a "list" (Tcl_Obj *) that contains the library path.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
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||
Tcl_Obj *
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TclGetLibraryPath(void)
|
||
{
|
||
return TclGetProcessGlobalValue(&libraryPath);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclSetLibraryPath --
|
||
*
|
||
* Keeps the per-thread copy of the library path current with changes to
|
||
* the global copy.
|
||
*
|
||
* Since the result of this routine is void, if searchPath is not a valid
|
||
* list this routine silently does nothing.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclSetLibraryPath(
|
||
Tcl_Obj *path)
|
||
{
|
||
int dummy;
|
||
|
||
if (TCL_ERROR == Tcl_ListObjLength(NULL, path, &dummy)) {
|
||
return;
|
||
}
|
||
TclSetProcessGlobalValue(&libraryPath, path, NULL);
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* FillEncodingFileMap --
|
||
*
|
||
* Called to update the encoding file map with the current value
|
||
* of the encoding search path.
|
||
*
|
||
* Finds *.end files in the directories on the encoding search path and
|
||
* stores the found pathnames in a map associated with the encoding name.
|
||
*
|
||
* If $dir is on the encoding search path and the file $dir/foo.enc is
|
||
* found, stores a "foo" -> $dir entry in the map. if the "foo" encoding
|
||
* is needed later, the $dir/foo.enc name can be quickly constructed in
|
||
* order to read the encoding data.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Entries are added to the encoding file map.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
FillEncodingFileMap(void)
|
||
{
|
||
int i, numDirs = 0;
|
||
Tcl_Obj *map, *searchPath;
|
||
|
||
searchPath = Tcl_GetEncodingSearchPath();
|
||
Tcl_IncrRefCount(searchPath);
|
||
Tcl_ListObjLength(NULL, searchPath, &numDirs);
|
||
map = Tcl_NewDictObj();
|
||
Tcl_IncrRefCount(map);
|
||
|
||
for (i = numDirs-1; i >= 0; i--) {
|
||
/*
|
||
* Iterate backwards through the search path so as we overwrite
|
||
* entries found, we favor files earlier on the search path.
|
||
*/
|
||
|
||
int j, numFiles;
|
||
Tcl_Obj *directory, *matchFileList = Tcl_NewObj();
|
||
Tcl_Obj **filev;
|
||
Tcl_GlobTypeData readableFiles = {
|
||
TCL_GLOB_TYPE_FILE, TCL_GLOB_PERM_R, NULL, NULL
|
||
};
|
||
|
||
Tcl_ListObjIndex(NULL, searchPath, i, &directory);
|
||
Tcl_IncrRefCount(directory);
|
||
Tcl_IncrRefCount(matchFileList);
|
||
Tcl_FSMatchInDirectory(NULL, matchFileList, directory, "*.enc",
|
||
&readableFiles);
|
||
|
||
Tcl_ListObjGetElements(NULL, matchFileList, &numFiles, &filev);
|
||
for (j=0; j<numFiles; j++) {
|
||
Tcl_Obj *encodingName, *fileObj;
|
||
|
||
fileObj = TclPathPart(NULL, filev[j], TCL_PATH_TAIL);
|
||
encodingName = TclPathPart(NULL, fileObj, TCL_PATH_ROOT);
|
||
Tcl_DictObjPut(NULL, map, encodingName, directory);
|
||
Tcl_DecrRefCount(fileObj);
|
||
Tcl_DecrRefCount(encodingName);
|
||
}
|
||
Tcl_DecrRefCount(matchFileList);
|
||
Tcl_DecrRefCount(directory);
|
||
}
|
||
Tcl_DecrRefCount(searchPath);
|
||
TclSetProcessGlobalValue(&encodingFileMap, map, NULL);
|
||
Tcl_DecrRefCount(map);
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* TclInitEncodingSubsystem --
|
||
*
|
||
* Initialize all resources used by this subsystem on a per-process
|
||
* basis.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Depends on the memory, object, and IO subsystems.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclInitEncodingSubsystem(void)
|
||
{
|
||
Tcl_EncodingType type;
|
||
TableEncodingData *dataPtr;
|
||
unsigned size;
|
||
unsigned short i;
|
||
union {
|
||
char c;
|
||
short s;
|
||
} isLe;
|
||
|
||
if (encodingsInitialized) {
|
||
return;
|
||
}
|
||
|
||
isLe.s = 1;
|
||
Tcl_MutexLock(&encodingMutex);
|
||
Tcl_InitHashTable(&encodingTable, TCL_STRING_KEYS);
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
|
||
/*
|
||
* Create a few initial encodings. UTF-8 to UTF-8 translation is not a
|
||
* no-op because it turns a stream of improperly formed UTF-8 into a
|
||
* properly formed stream.
|
||
*/
|
||
|
||
type.encodingName = "identity";
|
||
type.toUtfProc = BinaryProc;
|
||
type.fromUtfProc = BinaryProc;
|
||
type.freeProc = NULL;
|
||
type.nullSize = 1;
|
||
type.clientData = NULL;
|
||
tclIdentityEncoding = Tcl_CreateEncoding(&type);
|
||
|
||
type.encodingName = "utf-8";
|
||
type.toUtfProc = UtfExtToUtfIntProc;
|
||
type.fromUtfProc = UtfIntToUtfExtProc;
|
||
type.freeProc = NULL;
|
||
type.nullSize = 1;
|
||
type.clientData = NULL;
|
||
Tcl_CreateEncoding(&type);
|
||
|
||
type.encodingName = "unicode";
|
||
type.toUtfProc = UnicodeToUtfProc;
|
||
type.fromUtfProc = UtfToUnicodeProc;
|
||
type.freeProc = NULL;
|
||
type.nullSize = 2;
|
||
type.clientData = INT2PTR(isLe.c);
|
||
Tcl_CreateEncoding(&type);
|
||
|
||
/*
|
||
* Need the iso8859-1 encoding in order to process binary data, so force
|
||
* it to always be embedded. Note that this encoding *must* be a proper
|
||
* table encoding or some of the escape encodings crash! Hence the ugly
|
||
* code to duplicate the structure of a table encoding here.
|
||
*/
|
||
|
||
dataPtr = (TableEncodingData *)ckalloc(sizeof(TableEncodingData));
|
||
memset(dataPtr, 0, sizeof(TableEncodingData));
|
||
dataPtr->fallback = '?';
|
||
|
||
size = 256*(sizeof(unsigned short *) + sizeof(unsigned short));
|
||
dataPtr->toUnicode = (unsigned short **)ckalloc(size);
|
||
memset(dataPtr->toUnicode, 0, size);
|
||
dataPtr->fromUnicode = (unsigned short **)ckalloc(size);
|
||
memset(dataPtr->fromUnicode, 0, size);
|
||
|
||
dataPtr->toUnicode[0] = (unsigned short *) (dataPtr->toUnicode + 256);
|
||
dataPtr->fromUnicode[0] = (unsigned short *) (dataPtr->fromUnicode + 256);
|
||
for (i=1 ; i<256 ; i++) {
|
||
dataPtr->toUnicode[i] = emptyPage;
|
||
dataPtr->fromUnicode[i] = emptyPage;
|
||
}
|
||
|
||
for (i=0 ; i<256 ; i++) {
|
||
dataPtr->toUnicode[0][i] = i;
|
||
dataPtr->fromUnicode[0][i] = i;
|
||
}
|
||
|
||
type.encodingName = "iso8859-1";
|
||
type.toUtfProc = Iso88591ToUtfProc;
|
||
type.fromUtfProc = Iso88591FromUtfProc;
|
||
type.freeProc = TableFreeProc;
|
||
type.nullSize = 1;
|
||
type.clientData = dataPtr;
|
||
defaultEncoding = Tcl_CreateEncoding(&type);
|
||
systemEncoding = Tcl_GetEncoding(NULL, type.encodingName);
|
||
|
||
encodingsInitialized = 1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclFinalizeEncodingSubsystem --
|
||
*
|
||
* Release the state associated with the encoding subsystem.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Frees all of the encodings.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclFinalizeEncodingSubsystem(void)
|
||
{
|
||
Tcl_HashSearch search;
|
||
Tcl_HashEntry *hPtr;
|
||
|
||
Tcl_MutexLock(&encodingMutex);
|
||
encodingsInitialized = 0;
|
||
FreeEncoding(systemEncoding);
|
||
systemEncoding = NULL;
|
||
defaultEncoding = NULL;
|
||
FreeEncoding(tclIdentityEncoding);
|
||
tclIdentityEncoding = NULL;
|
||
|
||
hPtr = Tcl_FirstHashEntry(&encodingTable, &search);
|
||
while (hPtr != NULL) {
|
||
/*
|
||
* Call FreeEncoding instead of doing it directly to handle refcounts
|
||
* like escape encodings use. [Bug 524674] Make sure to call
|
||
* Tcl_FirstHashEntry repeatedly so that all encodings are eventually
|
||
* cleaned up.
|
||
*/
|
||
|
||
FreeEncoding((Tcl_Encoding)Tcl_GetHashValue(hPtr));
|
||
hPtr = Tcl_FirstHashEntry(&encodingTable, &search);
|
||
}
|
||
|
||
Tcl_DeleteHashTable(&encodingTable);
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetDefaultEncodingDir --
|
||
*
|
||
* Legacy public interface to retrieve first directory in the encoding
|
||
* searchPath.
|
||
*
|
||
* Results:
|
||
* The directory pathname, as a string, or NULL for an empty encoding
|
||
* search path.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
const char *
|
||
Tcl_GetDefaultEncodingDir(void)
|
||
{
|
||
int numDirs;
|
||
Tcl_Obj *first, *searchPath = Tcl_GetEncodingSearchPath();
|
||
|
||
Tcl_ListObjLength(NULL, searchPath, &numDirs);
|
||
if (numDirs == 0) {
|
||
return NULL;
|
||
}
|
||
Tcl_ListObjIndex(NULL, searchPath, 0, &first);
|
||
|
||
return TclGetString(first);
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_SetDefaultEncodingDir --
|
||
*
|
||
* Legacy public interface to set the first directory in the encoding
|
||
* search path.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Modifies the encoding search path.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_SetDefaultEncodingDir(
|
||
const char *path)
|
||
{
|
||
Tcl_Obj *searchPath = Tcl_GetEncodingSearchPath();
|
||
Tcl_Obj *directory = Tcl_NewStringObj(path, -1);
|
||
|
||
searchPath = Tcl_DuplicateObj(searchPath);
|
||
Tcl_ListObjReplace(NULL, searchPath, 0, 0, 1, &directory);
|
||
Tcl_SetEncodingSearchPath(searchPath);
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetEncoding --
|
||
*
|
||
* Given the name of a encoding, find the corresponding Tcl_Encoding
|
||
* token. If the encoding did not already exist, Tcl attempts to
|
||
* dynamically load an encoding by that name.
|
||
*
|
||
* Results:
|
||
* Returns a token that represents the encoding. If the name didn't refer
|
||
* to any known or loadable encoding, NULL is returned. If NULL was
|
||
* returned, an error message is left in interp's result object, unless
|
||
* interp was NULL.
|
||
*
|
||
* Side effects:
|
||
* LoadEncodingFile is called if necessary.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Encoding
|
||
Tcl_GetEncoding(
|
||
Tcl_Interp *interp, /* Interp for error reporting, if not NULL. */
|
||
const char *name) /* The name of the desired encoding. */
|
||
{
|
||
Tcl_HashEntry *hPtr;
|
||
Encoding *encodingPtr;
|
||
|
||
Tcl_MutexLock(&encodingMutex);
|
||
if (name == NULL) {
|
||
encodingPtr = (Encoding *) systemEncoding;
|
||
encodingPtr->refCount++;
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
return systemEncoding;
|
||
}
|
||
|
||
hPtr = Tcl_FindHashEntry(&encodingTable, name);
|
||
if (hPtr != NULL) {
|
||
encodingPtr = (Encoding *)Tcl_GetHashValue(hPtr);
|
||
encodingPtr->refCount++;
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
return (Tcl_Encoding) encodingPtr;
|
||
}
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
|
||
return LoadEncodingFile(interp, name);
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* Tcl_FreeEncoding --
|
||
*
|
||
* Releases an encoding allocated by Tcl_CreateEncoding() or
|
||
* Tcl_GetEncoding().
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The reference count associated with the encoding is decremented and
|
||
* the encoding is deleted if nothing is using it anymore.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_FreeEncoding(
|
||
Tcl_Encoding encoding)
|
||
{
|
||
Tcl_MutexLock(&encodingMutex);
|
||
FreeEncoding(encoding);
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* FreeEncoding --
|
||
*
|
||
* Decrements the reference count of an encoding. The caller must hold
|
||
* encodingMutes.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Releases the resource for an encoding if it is now unused.
|
||
* The reference count associated with the encoding is decremented and
|
||
* the encoding may be deleted if nothing is using it anymore.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
FreeEncoding(
|
||
Tcl_Encoding encoding)
|
||
{
|
||
Encoding *encodingPtr = (Encoding *) encoding;
|
||
|
||
if (encodingPtr == NULL) {
|
||
return;
|
||
}
|
||
if (encodingPtr->refCount<=0) {
|
||
Tcl_Panic("FreeEncoding: refcount problem !!!");
|
||
}
|
||
if (encodingPtr->refCount-- <= 1) {
|
||
if (encodingPtr->freeProc != NULL) {
|
||
encodingPtr->freeProc(encodingPtr->clientData);
|
||
}
|
||
if (encodingPtr->hPtr != NULL) {
|
||
Tcl_DeleteHashEntry(encodingPtr->hPtr);
|
||
}
|
||
if (encodingPtr->name) {
|
||
ckfree(encodingPtr->name);
|
||
}
|
||
ckfree(encodingPtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetEncodingName --
|
||
*
|
||
* Given an encoding, return the name that was used to constuct the
|
||
* encoding.
|
||
*
|
||
* Results:
|
||
* The name of the encoding.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
const char *
|
||
Tcl_GetEncodingName(
|
||
Tcl_Encoding encoding) /* The encoding whose name to fetch. */
|
||
{
|
||
if (encoding == NULL) {
|
||
encoding = systemEncoding;
|
||
}
|
||
|
||
return ((Encoding *) encoding)->name;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetEncodingNames --
|
||
*
|
||
* Get the list of all known encodings, including the ones stored as
|
||
* files on disk in the encoding path.
|
||
*
|
||
* Results:
|
||
* Modifies interp's result object to hold a list of all the available
|
||
* encodings.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_GetEncodingNames(
|
||
Tcl_Interp *interp) /* Interp to hold result. */
|
||
{
|
||
Tcl_HashTable table;
|
||
Tcl_HashSearch search;
|
||
Tcl_HashEntry *hPtr;
|
||
Tcl_Obj *map, *name, *result = Tcl_NewObj();
|
||
Tcl_DictSearch mapSearch;
|
||
int dummy, done = 0;
|
||
|
||
Tcl_InitObjHashTable(&table);
|
||
|
||
/*
|
||
* Copy encoding names from loaded encoding table to table.
|
||
*/
|
||
|
||
Tcl_MutexLock(&encodingMutex);
|
||
for (hPtr = Tcl_FirstHashEntry(&encodingTable, &search); hPtr != NULL;
|
||
hPtr = Tcl_NextHashEntry(&search)) {
|
||
Encoding *encodingPtr = (Encoding *)Tcl_GetHashValue(hPtr);
|
||
|
||
Tcl_CreateHashEntry(&table,
|
||
Tcl_NewStringObj(encodingPtr->name, -1), &dummy);
|
||
}
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
|
||
FillEncodingFileMap();
|
||
map = TclGetProcessGlobalValue(&encodingFileMap);
|
||
|
||
/*
|
||
* Copy encoding names from encoding file map to table.
|
||
*/
|
||
|
||
Tcl_DictObjFirst(NULL, map, &mapSearch, &name, NULL, &done);
|
||
for (; !done; Tcl_DictObjNext(&mapSearch, &name, NULL, &done)) {
|
||
Tcl_CreateHashEntry(&table, name, &dummy);
|
||
}
|
||
|
||
/*
|
||
* Pull all encoding names from table into the result list.
|
||
*/
|
||
|
||
for (hPtr = Tcl_FirstHashEntry(&table, &search); hPtr != NULL;
|
||
hPtr = Tcl_NextHashEntry(&search)) {
|
||
Tcl_ListObjAppendElement(NULL, result,
|
||
(Tcl_Obj *) Tcl_GetHashKey(&table, hPtr));
|
||
}
|
||
Tcl_SetObjResult(interp, result);
|
||
Tcl_DeleteHashTable(&table);
|
||
}
|
||
|
||
/*
|
||
*------------------------------------------------------------------------
|
||
*
|
||
* Tcl_SetSystemEncoding --
|
||
*
|
||
* Sets the default encoding that should be used whenever the user passes
|
||
* a NULL value in to one of the conversion routines. If the supplied
|
||
* name is NULL, the system encoding is reset to the default system
|
||
* encoding.
|
||
*
|
||
* Results:
|
||
* The return value is TCL_OK if the system encoding was successfully set
|
||
* to the encoding specified by name, TCL_ERROR otherwise. If TCL_ERROR
|
||
* is returned, an error message is left in interp's result object,
|
||
* unless interp was NULL.
|
||
*
|
||
* Side effects:
|
||
* The reference count of the new system encoding is incremented. The
|
||
* reference count of the old system encoding is decremented and it may
|
||
* be freed. All VFS cached information is invalidated.
|
||
*
|
||
*------------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_SetSystemEncoding(
|
||
Tcl_Interp *interp, /* Interp for error reporting, if not NULL. */
|
||
const char *name) /* The name of the desired encoding, or NULL/""
|
||
* to reset to default encoding. */
|
||
{
|
||
Tcl_Encoding encoding;
|
||
Encoding *encodingPtr;
|
||
|
||
if (!name || !*name) {
|
||
Tcl_MutexLock(&encodingMutex);
|
||
encoding = defaultEncoding;
|
||
encodingPtr = (Encoding *) encoding;
|
||
encodingPtr->refCount++;
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
} else {
|
||
encoding = Tcl_GetEncoding(interp, name);
|
||
if (encoding == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
Tcl_MutexLock(&encodingMutex);
|
||
FreeEncoding(systemEncoding);
|
||
systemEncoding = encoding;
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
Tcl_FSMountsChanged(NULL);
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* Tcl_CreateEncoding --
|
||
*
|
||
* Defines a new encoding, along with the functions that are used to
|
||
* convert to and from Unicode.
|
||
*
|
||
* Results:
|
||
* Returns a token that represents the encoding. If an encoding with the
|
||
* same name already existed, the old encoding token remains valid and
|
||
* continues to behave as it used to, and is eventually garbage collected
|
||
* when the last reference to it goes away. Any subsequent calls to
|
||
* Tcl_GetEncoding with the specified name retrieve the most recent
|
||
* encoding token.
|
||
*
|
||
* Side effects:
|
||
* A new record having the name of the encoding is entered into a table of
|
||
* encodings visible to all interpreters. For each call to this function,
|
||
* there should eventually be a call to Tcl_FreeEncoding, which cleans
|
||
* deletes the record in the table when an encoding is no longer needed.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Encoding
|
||
Tcl_CreateEncoding(
|
||
const Tcl_EncodingType *typePtr)
|
||
/* The encoding type. */
|
||
{
|
||
Tcl_HashEntry *hPtr;
|
||
int isNew;
|
||
Encoding *encodingPtr;
|
||
char *name;
|
||
|
||
Tcl_MutexLock(&encodingMutex);
|
||
hPtr = Tcl_CreateHashEntry(&encodingTable, typePtr->encodingName, &isNew);
|
||
if (isNew == 0) {
|
||
/*
|
||
* Remove old encoding from hash table, but don't delete it until last
|
||
* reference goes away.
|
||
*/
|
||
|
||
encodingPtr = (Encoding *)Tcl_GetHashValue(hPtr);
|
||
encodingPtr->hPtr = NULL;
|
||
}
|
||
|
||
name = (char *)ckalloc(strlen(typePtr->encodingName) + 1);
|
||
|
||
encodingPtr = (Encoding *)ckalloc(sizeof(Encoding));
|
||
encodingPtr->name = strcpy(name, typePtr->encodingName);
|
||
encodingPtr->toUtfProc = typePtr->toUtfProc;
|
||
encodingPtr->fromUtfProc = typePtr->fromUtfProc;
|
||
encodingPtr->freeProc = typePtr->freeProc;
|
||
encodingPtr->nullSize = typePtr->nullSize;
|
||
encodingPtr->clientData = typePtr->clientData;
|
||
if (typePtr->nullSize == 1) {
|
||
encodingPtr->lengthProc = (LengthProc *) strlen;
|
||
} else {
|
||
encodingPtr->lengthProc = (LengthProc *) unilen;
|
||
}
|
||
encodingPtr->refCount = 1;
|
||
encodingPtr->hPtr = hPtr;
|
||
Tcl_SetHashValue(hPtr, encodingPtr);
|
||
|
||
Tcl_MutexUnlock(&encodingMutex);
|
||
|
||
return (Tcl_Encoding) encodingPtr;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_ExternalToUtfDString --
|
||
*
|
||
* Convert a source buffer from the specified encoding into UTF-8. If any
|
||
* of the bytes in the source buffer are invalid or cannot be represented
|
||
* in the target encoding, a default fallback character will be
|
||
* substituted.
|
||
*
|
||
* Results:
|
||
* The converted bytes are stored in the DString, which is then NULL
|
||
* terminated. The return value is a pointer to the value stored in the
|
||
* DString.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
char *
|
||
Tcl_ExternalToUtfDString(
|
||
Tcl_Encoding encoding, /* The encoding for the source string, or NULL
|
||
* for the default system encoding. */
|
||
const char *src, /* Source string in specified encoding. */
|
||
int srcLen, /* Source string length in bytes, or < 0 for
|
||
* encoding-specific string length. */
|
||
Tcl_DString *dstPtr) /* Uninitialized or free DString in which the
|
||
* converted string is stored. */
|
||
{
|
||
char *dst;
|
||
Tcl_EncodingState state;
|
||
const Encoding *encodingPtr;
|
||
int flags, dstLen, result, soFar, srcRead, dstWrote, dstChars;
|
||
|
||
Tcl_DStringInit(dstPtr);
|
||
dst = Tcl_DStringValue(dstPtr);
|
||
dstLen = dstPtr->spaceAvl - 1;
|
||
|
||
if (encoding == NULL) {
|
||
encoding = systemEncoding;
|
||
}
|
||
encodingPtr = (Encoding *) encoding;
|
||
|
||
if (src == NULL) {
|
||
srcLen = 0;
|
||
} else if (srcLen < 0) {
|
||
srcLen = encodingPtr->lengthProc(src);
|
||
}
|
||
|
||
flags = TCL_ENCODING_START | TCL_ENCODING_END;
|
||
|
||
while (1) {
|
||
result = encodingPtr->toUtfProc(encodingPtr->clientData, src, srcLen,
|
||
flags, &state, dst, dstLen, &srcRead, &dstWrote, &dstChars);
|
||
soFar = dst + dstWrote - Tcl_DStringValue(dstPtr);
|
||
|
||
if (result != TCL_CONVERT_NOSPACE) {
|
||
Tcl_DStringSetLength(dstPtr, soFar);
|
||
return Tcl_DStringValue(dstPtr);
|
||
}
|
||
|
||
flags &= ~TCL_ENCODING_START;
|
||
src += srcRead;
|
||
srcLen -= srcRead;
|
||
if (Tcl_DStringLength(dstPtr) == 0) {
|
||
Tcl_DStringSetLength(dstPtr, dstLen);
|
||
}
|
||
Tcl_DStringSetLength(dstPtr, 2 * Tcl_DStringLength(dstPtr) + 1);
|
||
dst = Tcl_DStringValue(dstPtr) + soFar;
|
||
dstLen = Tcl_DStringLength(dstPtr) - soFar - 1;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_ExternalToUtf --
|
||
*
|
||
* Convert a source buffer from the specified encoding into UTF-8.
|
||
*
|
||
* Results:
|
||
* The return value is one of TCL_OK, TCL_CONVERT_MULTIBYTE,
|
||
* TCL_CONVERT_SYNTAX, TCL_CONVERT_UNKNOWN, or TCL_CONVERT_NOSPACE, as
|
||
* documented in tcl.h.
|
||
*
|
||
* Side effects:
|
||
* The converted bytes are stored in the output buffer.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_ExternalToUtf(
|
||
Tcl_Interp *interp, /* Interp for error return, if not NULL. */
|
||
Tcl_Encoding encoding, /* The encoding for the source string, or NULL
|
||
* for the default system encoding. */
|
||
const char *src, /* Source string in specified encoding. */
|
||
int srcLen, /* Source string length in bytes, or < 0 for
|
||
* encoding-specific string length. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
const Encoding *encodingPtr;
|
||
int result, srcRead, dstWrote, dstChars = 0;
|
||
int noTerminate = flags & TCL_ENCODING_NO_TERMINATE;
|
||
int charLimited = (flags & TCL_ENCODING_CHAR_LIMIT) && dstCharsPtr;
|
||
int maxChars = INT_MAX;
|
||
Tcl_EncodingState state;
|
||
|
||
if (encoding == NULL) {
|
||
encoding = systemEncoding;
|
||
}
|
||
encodingPtr = (Encoding *) encoding;
|
||
|
||
if (src == NULL) {
|
||
srcLen = 0;
|
||
} else if (srcLen < 0) {
|
||
srcLen = encodingPtr->lengthProc(src);
|
||
}
|
||
if (statePtr == NULL) {
|
||
flags |= TCL_ENCODING_START | TCL_ENCODING_END;
|
||
statePtr = &state;
|
||
}
|
||
if (srcReadPtr == NULL) {
|
||
srcReadPtr = &srcRead;
|
||
}
|
||
if (dstWrotePtr == NULL) {
|
||
dstWrotePtr = &dstWrote;
|
||
}
|
||
if (dstCharsPtr == NULL) {
|
||
dstCharsPtr = &dstChars;
|
||
flags &= ~TCL_ENCODING_CHAR_LIMIT;
|
||
} else if (charLimited) {
|
||
maxChars = *dstCharsPtr;
|
||
}
|
||
|
||
if (!noTerminate) {
|
||
/*
|
||
* If there are any null characters in the middle of the buffer,
|
||
* they will converted to the UTF-8 null character (\xC080). To get
|
||
* the actual \0 at the end of the destination buffer, we need to
|
||
* append it manually. First make room for it...
|
||
*/
|
||
|
||
dstLen--;
|
||
}
|
||
do {
|
||
Tcl_EncodingState savedState = *statePtr;
|
||
|
||
result = encodingPtr->toUtfProc(encodingPtr->clientData, src, srcLen,
|
||
flags, statePtr, dst, dstLen, srcReadPtr, dstWrotePtr,
|
||
dstCharsPtr);
|
||
if (*dstCharsPtr <= maxChars) {
|
||
break;
|
||
}
|
||
dstLen = Tcl_UtfAtIndex(dst, maxChars) - dst + (TCL_UTF_MAX - 1);
|
||
*statePtr = savedState;
|
||
} while (1);
|
||
if (!noTerminate) {
|
||
/* ...and then append it */
|
||
|
||
dst[*dstWrotePtr] = '\0';
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_UtfToExternalDString --
|
||
*
|
||
* Convert a source buffer from UTF-8 to the specified encoding. If any
|
||
* of the bytes in the source buffer are invalid or cannot be represented
|
||
* in the target encoding, a default fallback character is substituted.
|
||
*
|
||
* Results:
|
||
* The converted bytes are stored in the DString, which is then NULL
|
||
* terminated in an encoding-specific manner. The return value is a
|
||
* pointer to the value stored in the DString.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
char *
|
||
Tcl_UtfToExternalDString(
|
||
Tcl_Encoding encoding, /* The encoding for the converted string, or
|
||
* NULL for the default system encoding. */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes, or < 0 for
|
||
* strlen(). */
|
||
Tcl_DString *dstPtr) /* Uninitialized or free DString in which the
|
||
* converted string is stored. */
|
||
{
|
||
char *dst;
|
||
Tcl_EncodingState state;
|
||
const Encoding *encodingPtr;
|
||
int flags, dstLen, result, soFar, srcRead, dstWrote, dstChars;
|
||
|
||
Tcl_DStringInit(dstPtr);
|
||
dst = Tcl_DStringValue(dstPtr);
|
||
dstLen = dstPtr->spaceAvl - 1;
|
||
|
||
if (encoding == NULL) {
|
||
encoding = systemEncoding;
|
||
}
|
||
encodingPtr = (Encoding *) encoding;
|
||
|
||
if (src == NULL) {
|
||
srcLen = 0;
|
||
} else if (srcLen < 0) {
|
||
srcLen = strlen(src);
|
||
}
|
||
flags = TCL_ENCODING_START | TCL_ENCODING_END;
|
||
while (1) {
|
||
result = encodingPtr->fromUtfProc(encodingPtr->clientData, src,
|
||
srcLen, flags, &state, dst, dstLen, &srcRead, &dstWrote,
|
||
&dstChars);
|
||
soFar = dst + dstWrote - Tcl_DStringValue(dstPtr);
|
||
|
||
if (result != TCL_CONVERT_NOSPACE) {
|
||
if (encodingPtr->nullSize == 2) {
|
||
Tcl_DStringSetLength(dstPtr, soFar + 1);
|
||
}
|
||
Tcl_DStringSetLength(dstPtr, soFar);
|
||
return Tcl_DStringValue(dstPtr);
|
||
}
|
||
|
||
flags &= ~TCL_ENCODING_START;
|
||
src += srcRead;
|
||
srcLen -= srcRead;
|
||
if (Tcl_DStringLength(dstPtr) == 0) {
|
||
Tcl_DStringSetLength(dstPtr, dstLen);
|
||
}
|
||
Tcl_DStringSetLength(dstPtr, 2 * Tcl_DStringLength(dstPtr) + 1);
|
||
dst = Tcl_DStringValue(dstPtr) + soFar;
|
||
dstLen = Tcl_DStringLength(dstPtr) - soFar - 1;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Tcl_UtfToExternal --
|
||
*
|
||
* Convert a buffer from UTF-8 into the specified encoding.
|
||
*
|
||
* Results:
|
||
* The return value is one of TCL_OK, TCL_CONVERT_MULTIBYTE,
|
||
* TCL_CONVERT_SYNTAX, TCL_CONVERT_UNKNOWN, or TCL_CONVERT_NOSPACE, as
|
||
* documented in tcl.h.
|
||
*
|
||
* Side effects:
|
||
* The converted bytes are stored in the output buffer.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_UtfToExternal(
|
||
Tcl_Interp *interp, /* Interp for error return, if not NULL. */
|
||
Tcl_Encoding encoding, /* The encoding for the converted string, or
|
||
* NULL for the default system encoding. */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes, or < 0 for
|
||
* strlen(). */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string
|
||
* is stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
const Encoding *encodingPtr;
|
||
int result, srcRead, dstWrote, dstChars;
|
||
Tcl_EncodingState state;
|
||
|
||
if (encoding == NULL) {
|
||
encoding = systemEncoding;
|
||
}
|
||
encodingPtr = (Encoding *) encoding;
|
||
|
||
if (src == NULL) {
|
||
srcLen = 0;
|
||
} else if (srcLen < 0) {
|
||
srcLen = strlen(src);
|
||
}
|
||
if (statePtr == NULL) {
|
||
flags |= TCL_ENCODING_START | TCL_ENCODING_END;
|
||
statePtr = &state;
|
||
}
|
||
if (srcReadPtr == NULL) {
|
||
srcReadPtr = &srcRead;
|
||
}
|
||
if (dstWrotePtr == NULL) {
|
||
dstWrotePtr = &dstWrote;
|
||
}
|
||
if (dstCharsPtr == NULL) {
|
||
dstCharsPtr = &dstChars;
|
||
}
|
||
|
||
dstLen -= encodingPtr->nullSize;
|
||
result = encodingPtr->fromUtfProc(encodingPtr->clientData, src, srcLen,
|
||
flags, statePtr, dst, dstLen, srcReadPtr, dstWrotePtr,
|
||
dstCharsPtr);
|
||
if (encodingPtr->nullSize == 2) {
|
||
dst[*dstWrotePtr + 1] = '\0';
|
||
}
|
||
dst[*dstWrotePtr] = '\0';
|
||
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* Tcl_FindExecutable --
|
||
*
|
||
* This function computes the absolute path name of the current
|
||
* application, given its argv[0] value.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The absolute pathname for the application is computed and stored to be
|
||
* returned later by [info nameofexecutable].
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
#undef Tcl_FindExecutable
|
||
void
|
||
Tcl_FindExecutable(
|
||
const char *argv0) /* The value of the application's argv[0]
|
||
* (native). */
|
||
{
|
||
TclInitSubsystems();
|
||
TclpSetInitialEncodings();
|
||
TclpFindExecutable(argv0);
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* OpenEncodingFileChannel --
|
||
*
|
||
* Open the file believed to hold data for the encoding, "name".
|
||
*
|
||
* Results:
|
||
* Returns the readable Tcl_Channel from opening the file, or NULL if the
|
||
* file could not be successfully opened. If NULL was returned, an error
|
||
* message is left in interp's result object, unless interp was NULL.
|
||
*
|
||
* Side effects:
|
||
* Channel may be opened. Information about the filesystem may be cached
|
||
* to speed later calls.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static Tcl_Channel
|
||
OpenEncodingFileChannel(
|
||
Tcl_Interp *interp, /* Interp for error reporting, if not NULL. */
|
||
const char *name) /* The name of the encoding file on disk and
|
||
* also the name for new encoding. */
|
||
{
|
||
Tcl_Obj *nameObj = Tcl_NewStringObj(name, -1);
|
||
Tcl_Obj *fileNameObj = Tcl_DuplicateObj(nameObj);
|
||
Tcl_Obj *searchPath = Tcl_DuplicateObj(Tcl_GetEncodingSearchPath());
|
||
Tcl_Obj *map = TclGetProcessGlobalValue(&encodingFileMap);
|
||
Tcl_Obj **dir, *path, *directory = NULL;
|
||
Tcl_Channel chan = NULL;
|
||
int i, numDirs;
|
||
|
||
Tcl_ListObjGetElements(NULL, searchPath, &numDirs, &dir);
|
||
Tcl_IncrRefCount(nameObj);
|
||
Tcl_AppendToObj(fileNameObj, ".enc", -1);
|
||
Tcl_IncrRefCount(fileNameObj);
|
||
Tcl_DictObjGet(NULL, map, nameObj, &directory);
|
||
|
||
/*
|
||
* Check that any cached directory is still on the encoding search path.
|
||
*/
|
||
|
||
if (NULL != directory) {
|
||
int verified = 0;
|
||
|
||
for (i=0; i<numDirs && !verified; i++) {
|
||
if (dir[i] == directory) {
|
||
verified = 1;
|
||
}
|
||
}
|
||
if (!verified) {
|
||
const char *dirString = TclGetString(directory);
|
||
|
||
for (i=0; i<numDirs && !verified; i++) {
|
||
if (strcmp(dirString, TclGetString(dir[i])) == 0) {
|
||
verified = 1;
|
||
}
|
||
}
|
||
}
|
||
if (!verified) {
|
||
/*
|
||
* Directory no longer on the search path. Remove from cache.
|
||
*/
|
||
|
||
map = Tcl_DuplicateObj(map);
|
||
Tcl_DictObjRemove(NULL, map, nameObj);
|
||
TclSetProcessGlobalValue(&encodingFileMap, map, NULL);
|
||
directory = NULL;
|
||
}
|
||
}
|
||
|
||
if (NULL != directory) {
|
||
/*
|
||
* Got a directory from the cache. Try to use it first.
|
||
*/
|
||
|
||
Tcl_IncrRefCount(directory);
|
||
path = Tcl_FSJoinToPath(directory, 1, &fileNameObj);
|
||
Tcl_IncrRefCount(path);
|
||
Tcl_DecrRefCount(directory);
|
||
chan = Tcl_FSOpenFileChannel(NULL, path, "r", 0);
|
||
Tcl_DecrRefCount(path);
|
||
}
|
||
|
||
/*
|
||
* Scan the search path until we find it.
|
||
*/
|
||
|
||
for (i=0; i<numDirs && (chan == NULL); i++) {
|
||
path = Tcl_FSJoinToPath(dir[i], 1, &fileNameObj);
|
||
Tcl_IncrRefCount(path);
|
||
chan = Tcl_FSOpenFileChannel(NULL, path, "r", 0);
|
||
Tcl_DecrRefCount(path);
|
||
if (chan != NULL) {
|
||
/*
|
||
* Save directory in the cache.
|
||
*/
|
||
|
||
map = Tcl_DuplicateObj(TclGetProcessGlobalValue(&encodingFileMap));
|
||
Tcl_DictObjPut(NULL, map, nameObj, dir[i]);
|
||
TclSetProcessGlobalValue(&encodingFileMap, map, NULL);
|
||
}
|
||
}
|
||
|
||
if ((NULL == chan) && (interp != NULL)) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"unknown encoding \"%s\"", name));
|
||
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ENCODING", name, NULL);
|
||
}
|
||
Tcl_DecrRefCount(fileNameObj);
|
||
Tcl_DecrRefCount(nameObj);
|
||
Tcl_DecrRefCount(searchPath);
|
||
|
||
return chan;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* LoadEncodingFile --
|
||
*
|
||
* Read a file that describes an encoding and create a new Encoding from
|
||
* the data.
|
||
*
|
||
* Results:
|
||
* The return value is the newly loaded Tcl_Encoding or NULL if the file
|
||
* didn't exist or could not be processed. If NULL is returned and interp
|
||
* is not NULL, an error message is left in interp's result object.
|
||
*
|
||
* Side effects:
|
||
* A corresponding encoding file might be read from persistent storage, in
|
||
* which case LoadTableEncoding is called.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static Tcl_Encoding
|
||
LoadEncodingFile(
|
||
Tcl_Interp *interp, /* Interp for error reporting, if not NULL. */
|
||
const char *name) /* The name of both the encoding file
|
||
* and the new encoding. */
|
||
{
|
||
Tcl_Channel chan = NULL;
|
||
Tcl_Encoding encoding = NULL;
|
||
int ch;
|
||
|
||
chan = OpenEncodingFileChannel(interp, name);
|
||
if (chan == NULL) {
|
||
return NULL;
|
||
}
|
||
|
||
Tcl_SetChannelOption(NULL, chan, "-encoding", "utf-8");
|
||
|
||
while (1) {
|
||
Tcl_DString ds;
|
||
|
||
Tcl_DStringInit(&ds);
|
||
Tcl_Gets(chan, &ds);
|
||
ch = Tcl_DStringValue(&ds)[0];
|
||
Tcl_DStringFree(&ds);
|
||
if (ch != '#') {
|
||
break;
|
||
}
|
||
}
|
||
|
||
switch (ch) {
|
||
case 'S':
|
||
encoding = LoadTableEncoding(name, ENCODING_SINGLEBYTE, chan);
|
||
break;
|
||
case 'D':
|
||
encoding = LoadTableEncoding(name, ENCODING_DOUBLEBYTE, chan);
|
||
break;
|
||
case 'M':
|
||
encoding = LoadTableEncoding(name, ENCODING_MULTIBYTE, chan);
|
||
break;
|
||
case 'E':
|
||
encoding = LoadEscapeEncoding(name, chan);
|
||
break;
|
||
}
|
||
if ((encoding == NULL) && (interp != NULL)) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"invalid encoding file \"%s\"", name));
|
||
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ENCODING", name, NULL);
|
||
}
|
||
Tcl_Close(NULL, chan);
|
||
|
||
return encoding;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* LoadTableEncoding --
|
||
*
|
||
* Helper function for LoadEncodingFile(). Creates a Tcl_EncodingType
|
||
* structure along with its corresponding TableEncodingData structure, and
|
||
* passes it to Tcl_Createncoding.
|
||
*
|
||
* The file contains binary data but begins with a marker to indicate
|
||
* byte-ordering so a single binary file can be read on big or
|
||
* little-endian systems.
|
||
*
|
||
* Results:
|
||
* Returns the new Tcl_Encoding, or NULL if it could could
|
||
* not be created because the file contained invalid data.
|
||
*
|
||
* Side effects:
|
||
* See Tcl_CreateEncoding().
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static Tcl_Encoding
|
||
LoadTableEncoding(
|
||
const char *name, /* Name of the new encoding. */
|
||
int type, /* Type of encoding (ENCODING_?????). */
|
||
Tcl_Channel chan) /* File containing new encoding. */
|
||
{
|
||
Tcl_DString lineString;
|
||
Tcl_Obj *objPtr;
|
||
char *line;
|
||
int i, hi, lo, numPages, symbol, fallback, len;
|
||
unsigned char used[256];
|
||
unsigned size;
|
||
TableEncodingData *dataPtr;
|
||
unsigned short *pageMemPtr, *page;
|
||
Tcl_EncodingType encType;
|
||
|
||
/*
|
||
* Speed over memory. Use a full 256 character table to decode hex
|
||
* sequences in the encoding files.
|
||
*/
|
||
|
||
static const char staticHex[] = {
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0 ... 15 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 16 ... 31 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 32 ... 47 */
|
||
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 48 ... 63 */
|
||
0, 10, 11, 12, 13, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 64 ... 79 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 80 ... 95 */
|
||
0, 10, 11, 12, 13, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 96 ... 111 */
|
||
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 112 ... 127 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 128 ... 143 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 144 ... 159 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 160 ... 175 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 176 ... 191 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 192 ... 207 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 208 ... 223 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 224 ... 239 */
|
||
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 240 ... 255 */
|
||
};
|
||
|
||
Tcl_DStringInit(&lineString);
|
||
if (Tcl_Gets(chan, &lineString) == -1) {
|
||
return NULL;
|
||
}
|
||
line = Tcl_DStringValue(&lineString);
|
||
|
||
fallback = (int) strtol(line, &line, 16);
|
||
symbol = (int) strtol(line, &line, 10);
|
||
numPages = (int) strtol(line, &line, 10);
|
||
Tcl_DStringFree(&lineString);
|
||
|
||
if (numPages < 0) {
|
||
numPages = 0;
|
||
} else if (numPages > 256) {
|
||
numPages = 256;
|
||
}
|
||
|
||
memset(used, 0, sizeof(used));
|
||
|
||
#undef PAGESIZE
|
||
#define PAGESIZE (256 * sizeof(unsigned short))
|
||
|
||
dataPtr = (TableEncodingData *)ckalloc(sizeof(TableEncodingData));
|
||
memset(dataPtr, 0, sizeof(TableEncodingData));
|
||
|
||
dataPtr->fallback = fallback;
|
||
|
||
/*
|
||
* Read the table that maps characters to Unicode. Performs a single
|
||
* malloc to get the memory for the array and all the pages needed by the
|
||
* array.
|
||
*/
|
||
|
||
size = 256 * sizeof(unsigned short *) + numPages * PAGESIZE;
|
||
dataPtr->toUnicode = (unsigned short **)ckalloc(size);
|
||
memset(dataPtr->toUnicode, 0, size);
|
||
pageMemPtr = (unsigned short *) (dataPtr->toUnicode + 256);
|
||
|
||
TclNewObj(objPtr);
|
||
Tcl_IncrRefCount(objPtr);
|
||
for (i = 0; i < numPages; i++) {
|
||
int ch;
|
||
const char *p;
|
||
int expected = 3 + 16 * (16 * 4 + 1);
|
||
|
||
if (Tcl_ReadChars(chan, objPtr, expected, 0) != expected) {
|
||
return NULL;
|
||
}
|
||
p = TclGetString(objPtr);
|
||
hi = (staticHex[UCHAR(p[0])] << 4) + staticHex[UCHAR(p[1])];
|
||
dataPtr->toUnicode[hi] = pageMemPtr;
|
||
p += 2;
|
||
for (lo = 0; lo < 256; lo++) {
|
||
if ((lo & 0x0F) == 0) {
|
||
p++;
|
||
}
|
||
ch = (staticHex[UCHAR(p[0])] << 12) + (staticHex[UCHAR(p[1])] << 8)
|
||
+ (staticHex[UCHAR(p[2])] << 4) + staticHex[UCHAR(p[3])];
|
||
if (ch != 0) {
|
||
used[ch >> 8] = 1;
|
||
}
|
||
*pageMemPtr = (unsigned short) ch;
|
||
pageMemPtr++;
|
||
p += 4;
|
||
}
|
||
}
|
||
TclDecrRefCount(objPtr);
|
||
|
||
if (type == ENCODING_DOUBLEBYTE) {
|
||
memset(dataPtr->prefixBytes, 1, sizeof(dataPtr->prefixBytes));
|
||
} else {
|
||
for (hi = 1; hi < 256; hi++) {
|
||
if (dataPtr->toUnicode[hi] != NULL) {
|
||
dataPtr->prefixBytes[hi] = 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Invert the toUnicode array to produce the fromUnicode array. Performs a
|
||
* single malloc to get the memory for the array and all the pages needed
|
||
* by the array. While reading in the toUnicode array remember what
|
||
* pages are needed for the fromUnicode array.
|
||
*/
|
||
|
||
if (symbol) {
|
||
used[0] = 1;
|
||
}
|
||
numPages = 0;
|
||
for (hi = 0; hi < 256; hi++) {
|
||
if (used[hi]) {
|
||
numPages++;
|
||
}
|
||
}
|
||
size = 256 * sizeof(unsigned short *) + numPages * PAGESIZE;
|
||
dataPtr->fromUnicode = (unsigned short **)ckalloc(size);
|
||
memset(dataPtr->fromUnicode, 0, size);
|
||
pageMemPtr = (unsigned short *) (dataPtr->fromUnicode + 256);
|
||
|
||
for (hi = 0; hi < 256; hi++) {
|
||
if (dataPtr->toUnicode[hi] == NULL) {
|
||
dataPtr->toUnicode[hi] = emptyPage;
|
||
continue;
|
||
}
|
||
for (lo = 0; lo < 256; lo++) {
|
||
int ch = dataPtr->toUnicode[hi][lo];
|
||
|
||
if (ch != 0) {
|
||
page = dataPtr->fromUnicode[ch >> 8];
|
||
if (page == NULL) {
|
||
page = pageMemPtr;
|
||
pageMemPtr += 256;
|
||
dataPtr->fromUnicode[ch >> 8] = page;
|
||
}
|
||
page[ch & 0xFF] = (unsigned short) ((hi << 8) + lo);
|
||
}
|
||
}
|
||
}
|
||
if (type == ENCODING_MULTIBYTE) {
|
||
/*
|
||
* If multibyte encodings don't have a backslash character, define
|
||
* one. Otherwise, on Windows, native file names don't work because
|
||
* the backslash in the file name maps to the unknown character
|
||
* (question mark) when converting from UTF-8 to external encoding.
|
||
*/
|
||
|
||
if (dataPtr->fromUnicode[0] != NULL) {
|
||
if (dataPtr->fromUnicode[0]['\\'] == '\0') {
|
||
dataPtr->fromUnicode[0]['\\'] = '\\';
|
||
}
|
||
}
|
||
}
|
||
if (symbol) {
|
||
/*
|
||
* Make a special symbol encoding that maps each symbol character from
|
||
* its Unicode code point down into page 0, and also ensure that each
|
||
* characters on page 0 maps to itself so that a symbol font can be
|
||
* used to display a simple string like "abcd" and have alpha, beta,
|
||
* chi, delta show up, rather than have "unknown" chars show up because
|
||
* strictly speaking the symbol font doesn't have glyphs for those low
|
||
* ASCII chars.
|
||
*/
|
||
|
||
page = dataPtr->fromUnicode[0];
|
||
if (page == NULL) {
|
||
page = pageMemPtr;
|
||
dataPtr->fromUnicode[0] = page;
|
||
}
|
||
for (lo = 0; lo < 256; lo++) {
|
||
if (dataPtr->toUnicode[0][lo] != 0) {
|
||
page[lo] = (unsigned short) lo;
|
||
}
|
||
}
|
||
}
|
||
for (hi = 0; hi < 256; hi++) {
|
||
if (dataPtr->fromUnicode[hi] == NULL) {
|
||
dataPtr->fromUnicode[hi] = emptyPage;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* For trailing 'R'everse encoding, see [Patch 689341]
|
||
*/
|
||
|
||
Tcl_DStringInit(&lineString);
|
||
|
||
/*
|
||
* Skip leading empty lines.
|
||
*/
|
||
|
||
while ((len = Tcl_Gets(chan, &lineString)) == 0) {
|
||
/* empty body */
|
||
}
|
||
if (len < 0) {
|
||
goto doneParse;
|
||
}
|
||
|
||
/*
|
||
* Require that it starts with an 'R'.
|
||
*/
|
||
|
||
line = Tcl_DStringValue(&lineString);
|
||
if (line[0] != 'R') {
|
||
goto doneParse;
|
||
}
|
||
|
||
/*
|
||
* Read lines until EOF.
|
||
*/
|
||
|
||
for (TclDStringClear(&lineString);
|
||
(len = Tcl_Gets(chan, &lineString)) >= 0;
|
||
TclDStringClear(&lineString)) {
|
||
const unsigned char *p;
|
||
int to, from;
|
||
|
||
/*
|
||
* Skip short lines.
|
||
*/
|
||
|
||
if (len < 5) {
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* Parse the line as a sequence of hex digits.
|
||
*/
|
||
|
||
p = (const unsigned char *) Tcl_DStringValue(&lineString);
|
||
to = (staticHex[p[0]] << 12) + (staticHex[p[1]] << 8)
|
||
+ (staticHex[p[2]] << 4) + staticHex[p[3]];
|
||
if (to == 0) {
|
||
continue;
|
||
}
|
||
for (p += 5, len -= 5; len >= 0 && *p; p += 5, len -= 5) {
|
||
from = (staticHex[p[0]] << 12) + (staticHex[p[1]] << 8)
|
||
+ (staticHex[p[2]] << 4) + staticHex[p[3]];
|
||
if (from == 0) {
|
||
continue;
|
||
}
|
||
dataPtr->fromUnicode[from >> 8][from & 0xFF] = to;
|
||
}
|
||
}
|
||
doneParse:
|
||
Tcl_DStringFree(&lineString);
|
||
|
||
/*
|
||
* Package everything into an encoding structure.
|
||
*/
|
||
|
||
encType.encodingName = name;
|
||
encType.toUtfProc = TableToUtfProc;
|
||
encType.fromUtfProc = TableFromUtfProc;
|
||
encType.freeProc = TableFreeProc;
|
||
encType.nullSize = (type == ENCODING_DOUBLEBYTE) ? 2 : 1;
|
||
encType.clientData = dataPtr;
|
||
|
||
return Tcl_CreateEncoding(&encType);
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* LoadEscapeEncoding --
|
||
*
|
||
* Helper function for LoadEncodingTable(). Loads a state machine that
|
||
* converts between Unicode and some other encoding.
|
||
*
|
||
* File contains text data that describes the escape sequences that are
|
||
* used to choose an encoding and the associated names for the
|
||
* sub-encodings.
|
||
*
|
||
* Results:
|
||
* The return value is the new encoding, or NULL if the encoding could
|
||
* not be created (because the file contained invalid data).
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static Tcl_Encoding
|
||
LoadEscapeEncoding(
|
||
const char *name, /* Name of the new encoding. */
|
||
Tcl_Channel chan) /* File containing new encoding. */
|
||
{
|
||
int i;
|
||
unsigned size;
|
||
Tcl_DString escapeData;
|
||
char init[16], final[16];
|
||
EscapeEncodingData *dataPtr;
|
||
Tcl_EncodingType type;
|
||
|
||
init[0] = '\0';
|
||
final[0] = '\0';
|
||
Tcl_DStringInit(&escapeData);
|
||
|
||
while (1) {
|
||
int argc;
|
||
const char **argv;
|
||
char *line;
|
||
Tcl_DString lineString;
|
||
|
||
Tcl_DStringInit(&lineString);
|
||
if (Tcl_Gets(chan, &lineString) < 0) {
|
||
break;
|
||
}
|
||
line = Tcl_DStringValue(&lineString);
|
||
if (Tcl_SplitList(NULL, line, &argc, &argv) != TCL_OK) {
|
||
Tcl_DStringFree(&lineString);
|
||
continue;
|
||
}
|
||
if (argc >= 2) {
|
||
if (strcmp(argv[0], "name") == 0) {
|
||
/* do nothing */
|
||
} else if (strcmp(argv[0], "init") == 0) {
|
||
strncpy(init, argv[1], sizeof(init));
|
||
init[sizeof(init) - 1] = '\0';
|
||
} else if (strcmp(argv[0], "final") == 0) {
|
||
strncpy(final, argv[1], sizeof(final));
|
||
final[sizeof(final) - 1] = '\0';
|
||
} else {
|
||
EscapeSubTable est;
|
||
Encoding *e;
|
||
|
||
strncpy(est.sequence, argv[1], sizeof(est.sequence));
|
||
est.sequence[sizeof(est.sequence) - 1] = '\0';
|
||
est.sequenceLen = strlen(est.sequence);
|
||
|
||
strncpy(est.name, argv[0], sizeof(est.name));
|
||
est.name[sizeof(est.name) - 1] = '\0';
|
||
|
||
/*
|
||
* To avoid infinite recursion in [encoding system iso2022-*]
|
||
*/
|
||
|
||
e = (Encoding *) Tcl_GetEncoding(NULL, est.name);
|
||
if ((e != NULL) && (e->toUtfProc != TableToUtfProc)
|
||
&& (e->toUtfProc != Iso88591ToUtfProc)) {
|
||
Tcl_FreeEncoding((Tcl_Encoding) e);
|
||
e = NULL;
|
||
}
|
||
est.encodingPtr = e;
|
||
Tcl_DStringAppend(&escapeData, (char *) &est, sizeof(est));
|
||
}
|
||
}
|
||
ckfree(argv);
|
||
Tcl_DStringFree(&lineString);
|
||
}
|
||
|
||
size = TclOffset(EscapeEncodingData, subTables)
|
||
+ Tcl_DStringLength(&escapeData);
|
||
dataPtr = (EscapeEncodingData *)ckalloc(size);
|
||
dataPtr->initLen = strlen(init);
|
||
memcpy(dataPtr->init, init, dataPtr->initLen + 1);
|
||
dataPtr->finalLen = strlen(final);
|
||
memcpy(dataPtr->final, final, dataPtr->finalLen + 1);
|
||
dataPtr->numSubTables =
|
||
Tcl_DStringLength(&escapeData) / sizeof(EscapeSubTable);
|
||
memcpy(dataPtr->subTables, Tcl_DStringValue(&escapeData),
|
||
Tcl_DStringLength(&escapeData));
|
||
Tcl_DStringFree(&escapeData);
|
||
|
||
memset(dataPtr->prefixBytes, 0, sizeof(dataPtr->prefixBytes));
|
||
for (i = 0; i < dataPtr->numSubTables; i++) {
|
||
dataPtr->prefixBytes[UCHAR(dataPtr->subTables[i].sequence[0])] = 1;
|
||
}
|
||
if (dataPtr->init[0] != '\0') {
|
||
dataPtr->prefixBytes[UCHAR(dataPtr->init[0])] = 1;
|
||
}
|
||
if (dataPtr->final[0] != '\0') {
|
||
dataPtr->prefixBytes[UCHAR(dataPtr->final[0])] = 1;
|
||
}
|
||
|
||
/*
|
||
* Package everything into an encoding structure.
|
||
*/
|
||
|
||
type.encodingName = name;
|
||
type.toUtfProc = EscapeToUtfProc;
|
||
type.fromUtfProc = EscapeFromUtfProc;
|
||
type.freeProc = EscapeFreeProc;
|
||
type.nullSize = 1;
|
||
type.clientData = dataPtr;
|
||
|
||
return Tcl_CreateEncoding(&type);
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* BinaryProc --
|
||
*
|
||
* The default conversion when no other conversion is specified. No
|
||
* translation is done; source bytes are copied directly to destination
|
||
* bytes.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
BinaryProc(
|
||
ClientData clientData, /* Not used. */
|
||
const char *src, /* Source string (unknown encoding). */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
int result;
|
||
|
||
result = TCL_OK;
|
||
dstLen -= TCL_UTF_MAX - 1;
|
||
if (dstLen < 0) {
|
||
dstLen = 0;
|
||
}
|
||
if ((flags & TCL_ENCODING_CHAR_LIMIT) && srcLen > *dstCharsPtr) {
|
||
srcLen = *dstCharsPtr;
|
||
}
|
||
if (srcLen > dstLen) {
|
||
srcLen = dstLen;
|
||
result = TCL_CONVERT_NOSPACE;
|
||
}
|
||
|
||
*srcReadPtr = srcLen;
|
||
*dstWrotePtr = srcLen;
|
||
*dstCharsPtr = srcLen;
|
||
memcpy(dst, src, srcLen);
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* UtfIntToUtfExtProc --
|
||
*
|
||
* Convert from UTF-8 to UTF-8. While converting null-bytes from the
|
||
* Tcl's internal representation (0xC0, 0x80) to the official
|
||
* representation (0x00). See UtfToUtfProc for details.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
UtfIntToUtfExtProc(
|
||
ClientData clientData, /* Not used. */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string
|
||
* is stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
return UtfToUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
||
srcReadPtr, dstWrotePtr, dstCharsPtr, 1);
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* UtfExtToUtfIntProc --
|
||
*
|
||
* Convert from UTF-8 to UTF-8 while converting null-bytes from the
|
||
* official representation (0x00) to Tcl's internal representation (0xC0,
|
||
* 0x80). See UtfToUtfProc for details.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
UtfExtToUtfIntProc(
|
||
ClientData clientData, /* Not used. */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
return UtfToUtfProc(clientData, src, srcLen, flags, statePtr, dst, dstLen,
|
||
srcReadPtr, dstWrotePtr, dstCharsPtr, 0);
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* UtfToUtfProc --
|
||
*
|
||
* Convert from UTF-8 to UTF-8. Note that the UTF-8 to UTF-8 translation
|
||
* is not a no-op, because it will turn a stream of improperly formed
|
||
* UTF-8 into a properly formed stream.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
UtfToUtfProc(
|
||
ClientData clientData, /* Not used. */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr, /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
int pureNullMode) /* Convert embedded nulls from internal
|
||
* representation to real null-bytes or vice
|
||
* versa. Also combine or separate surrogate pairs */
|
||
{
|
||
const char *srcStart, *srcEnd, *srcClose;
|
||
const char *dstStart, *dstEnd;
|
||
int result, numChars, charLimit = INT_MAX;
|
||
Tcl_UniChar *chPtr = (Tcl_UniChar *) statePtr;
|
||
|
||
if (flags & TCL_ENCODING_START) {
|
||
*statePtr = 0;
|
||
}
|
||
result = TCL_OK;
|
||
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
srcClose = srcEnd;
|
||
if ((flags & TCL_ENCODING_END) == 0) {
|
||
srcClose -= 6;
|
||
}
|
||
if (flags & TCL_ENCODING_CHAR_LIMIT) {
|
||
charLimit = *dstCharsPtr;
|
||
}
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - ((pureNullMode == 1) ? 4 : TCL_UTF_MAX);
|
||
|
||
for (numChars = 0; src < srcEnd && numChars <= charLimit; numChars++) {
|
||
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
||
/*
|
||
* If there is more string to follow, this will ensure that the
|
||
* last UTF-8 character in the source buffer hasn't been cut off.
|
||
*/
|
||
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
break;
|
||
}
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
if (UCHAR(*src) < 0x80 && !((UCHAR(*src) == 0) && (pureNullMode == 0))) {
|
||
/*
|
||
* Copy 7bit characters, but skip null-bytes when we are in input
|
||
* mode, so that they get converted to 0xC080.
|
||
*/
|
||
|
||
*dst++ = *src++;
|
||
*chPtr = 0; /* reset surrogate handling */
|
||
} else if ((UCHAR(*src) == 0xC0) && (src + 1 < srcEnd)
|
||
&& (UCHAR(src[1]) == 0x80) && (pureNullMode == 1)) {
|
||
/*
|
||
* Convert 0xC080 to real nulls when we are in output mode.
|
||
*/
|
||
|
||
*dst++ = 0;
|
||
*chPtr = 0; /* reset surrogate handling */
|
||
src += 2;
|
||
} else if (!Tcl_UtfCharComplete(src, srcEnd - src)) {
|
||
/*
|
||
* Always check before using TclUtfToUniChar. Not doing can so
|
||
* cause it run beyond the end of the buffer! If we happen such an
|
||
* incomplete char its bytes are made to represent themselves
|
||
* unless the user has explicitly asked to be told.
|
||
*/
|
||
|
||
if ((flags & TCL_ENCODING_STOPONERROR) && (pureNullMode == 0)) {
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
break;
|
||
}
|
||
*chPtr = UCHAR(*src);
|
||
src += 1;
|
||
dst += Tcl_UniCharToUtf(*chPtr, dst);
|
||
} else {
|
||
size_t len = TclUtfToUniChar(src, chPtr);
|
||
if ((len < 2) && (*chPtr != 0) && (flags & TCL_ENCODING_STOPONERROR)
|
||
&& ((*chPtr & ~0x7FF) != 0xD800) && (pureNullMode == 0)) {
|
||
result = TCL_CONVERT_SYNTAX;
|
||
break;
|
||
}
|
||
src += len;
|
||
if ((*chPtr & ~0x7FF) == 0xD800) {
|
||
Tcl_UniChar low;
|
||
/* A surrogate character is detected, handle especially */
|
||
#if TCL_UTF_MAX <= 4
|
||
if ((len < 3) && ((src[3 - len] & 0xC0) != 0x80)) {
|
||
/* It's invalid. See [ed29806ba] */
|
||
*chPtr = UCHAR(src[-1]);
|
||
dst += Tcl_UniCharToUtf(*chPtr, dst);
|
||
continue;
|
||
}
|
||
#endif
|
||
low = *chPtr;
|
||
len = (src <= srcEnd-3) ? Tcl_UtfToUniChar(src, &low) : 0;
|
||
if (((low & ~0x3FF) != 0xDC00) || (*chPtr & 0x400)) {
|
||
*dst++ = (char) (((*chPtr >> 12) | 0xE0) & 0xEF);
|
||
*dst++ = (char) (((*chPtr >> 6) | 0x80) & 0xBF);
|
||
*dst++ = (char) ((*chPtr | 0x80) & 0xBF);
|
||
*chPtr = 0; /* reset surrogate handling */
|
||
continue;
|
||
} else if ((TCL_UTF_MAX > 3) || (pureNullMode == 1)) {
|
||
int full = (((*chPtr & 0x3FF) << 10) | (low & 0x3FF)) + 0x10000;
|
||
*dst++ = (char) (((full >> 18) | 0xF0) & 0xF7);
|
||
*dst++ = (char) (((full >> 12) | 0x80) & 0xBF);
|
||
*dst++ = (char) (((full >> 6) | 0x80) & 0xBF);
|
||
*dst++ = (char) ((full | 0x80) & 0xBF);
|
||
*chPtr = 0; /* reset surrogate handling */
|
||
src += len;
|
||
continue;
|
||
}
|
||
}
|
||
dst += Tcl_UniCharToUtf(*chPtr, dst);
|
||
}
|
||
}
|
||
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* UnicodeToUtfProc --
|
||
*
|
||
* Convert from UTF-16 to UTF-8.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
UnicodeToUtfProc(
|
||
ClientData clientData, /* != NULL means LE, == NUL means BE */
|
||
const char *src, /* Source string in Unicode. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
const char *srcStart, *srcEnd;
|
||
const char *dstEnd, *dstStart;
|
||
int result, numChars, charLimit = INT_MAX;
|
||
unsigned short ch;
|
||
|
||
if (flags & TCL_ENCODING_CHAR_LIMIT) {
|
||
charLimit = *dstCharsPtr;
|
||
}
|
||
result = TCL_OK;
|
||
|
||
/* check alignment with utf-16 (2 == sizeof(UTF-16)) */
|
||
if ((srcLen % 2) != 0) {
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
srcLen--;
|
||
}
|
||
|
||
/*
|
||
* If last code point is a high surrogate, we cannot handle that yet.
|
||
*/
|
||
|
||
if ((srcLen >= 2) &&
|
||
((src[srcLen - (clientData?1:2)] & 0xFC) == 0xD8)) {
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
srcLen-= 2;
|
||
}
|
||
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - TCL_UTF_MAX;
|
||
|
||
for (numChars = 0; src < srcEnd && numChars <= charLimit; numChars++) {
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
|
||
if (clientData) {
|
||
ch = (src[1] & 0xFF) << 8 | (src[0] & 0xFF);
|
||
} else {
|
||
ch = (src[0] & 0xFF) << 8 | (src[1] & 0xFF);
|
||
}
|
||
|
||
/*
|
||
* Special case for 1-byte utf chars for speed. Make sure we work with
|
||
* unsigned short-size data.
|
||
*/
|
||
|
||
if (ch && ch < 0x80) {
|
||
*dst++ = (ch & 0xFF);
|
||
} else {
|
||
dst += Tcl_UniCharToUtf(ch, dst);
|
||
}
|
||
src += sizeof(unsigned short);
|
||
}
|
||
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* UtfToUnicodeProc --
|
||
*
|
||
* Convert from UTF-8 to UTF-16.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
UtfToUnicodeProc(
|
||
ClientData clientData, /* != NULL means LE, == NUL means BE */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
const char *srcStart, *srcEnd, *srcClose, *dstStart, *dstEnd;
|
||
int result, numChars;
|
||
Tcl_UniChar *chPtr = (Tcl_UniChar *) statePtr;
|
||
|
||
if (flags & TCL_ENCODING_START) {
|
||
*statePtr = 0;
|
||
}
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
srcClose = srcEnd;
|
||
if ((flags & TCL_ENCODING_END) == 0) {
|
||
srcClose -= TCL_UTF_MAX;
|
||
}
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - sizeof(Tcl_UniChar);
|
||
|
||
result = TCL_OK;
|
||
for (numChars = 0; src < srcEnd; numChars++) {
|
||
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
||
/*
|
||
* If there is more string to follow, this will ensure that the
|
||
* last UTF-8 character in the source buffer hasn't been cut off.
|
||
*/
|
||
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
break;
|
||
}
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
src += TclUtfToUniChar(src, chPtr);
|
||
|
||
if (clientData) {
|
||
#if TCL_UTF_MAX > 4
|
||
if (*chPtr <= 0xFFFF) {
|
||
*dst++ = (*chPtr & 0xFF);
|
||
*dst++ = (*chPtr >> 8);
|
||
} else {
|
||
*dst++ = (((*chPtr - 0x10000) >> 10) & 0xFF);
|
||
*dst++ = (((*chPtr - 0x10000) >> 18) & 0x3) | 0xD8;
|
||
*dst++ = (*chPtr & 0xFF);
|
||
*dst++ = ((*chPtr >> 8) & 0x3) | 0xDC;
|
||
}
|
||
#else
|
||
*dst++ = (*chPtr & 0xFF);
|
||
*dst++ = (*chPtr >> 8);
|
||
#endif
|
||
} else {
|
||
#if TCL_UTF_MAX > 4
|
||
if (*chPtr <= 0xFFFF) {
|
||
*dst++ = (*chPtr >> 8);
|
||
*dst++ = (*chPtr & 0xFF);
|
||
} else {
|
||
*dst++ = (((*chPtr - 0x10000) >> 18) & 0x3) | 0xD8;
|
||
*dst++ = (((*chPtr - 0x10000) >> 10) & 0xFF);
|
||
*dst++ = ((*chPtr >> 8) & 0x3) | 0xDC;
|
||
*dst++ = (*chPtr & 0xFF);
|
||
}
|
||
#else
|
||
*dst++ = (*chPtr >> 8);
|
||
*dst++ = (*chPtr & 0xFF);
|
||
#endif
|
||
}
|
||
}
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* TableToUtfProc --
|
||
*
|
||
* Convert from the encoding specified by the TableEncodingData into
|
||
* UTF-8.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
TableToUtfProc(
|
||
ClientData clientData, /* TableEncodingData that specifies
|
||
* encoding. */
|
||
const char *src, /* Source string in specified encoding. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
const char *srcStart, *srcEnd;
|
||
const char *dstEnd, *dstStart, *prefixBytes;
|
||
int result, byte, numChars, charLimit = INT_MAX;
|
||
Tcl_UniChar ch = 0;
|
||
const unsigned short *const *toUnicode;
|
||
const unsigned short *pageZero;
|
||
TableEncodingData *dataPtr = (TableEncodingData *)clientData;
|
||
|
||
if (flags & TCL_ENCODING_CHAR_LIMIT) {
|
||
charLimit = *dstCharsPtr;
|
||
}
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - TCL_UTF_MAX;
|
||
|
||
toUnicode = (const unsigned short *const *) dataPtr->toUnicode;
|
||
prefixBytes = dataPtr->prefixBytes;
|
||
pageZero = toUnicode[0];
|
||
|
||
result = TCL_OK;
|
||
for (numChars = 0; src < srcEnd && numChars <= charLimit; numChars++) {
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
byte = *((unsigned char *) src);
|
||
if (prefixBytes[byte]) {
|
||
src++;
|
||
if (src >= srcEnd) {
|
||
src--;
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
break;
|
||
}
|
||
ch = toUnicode[byte][*((unsigned char *) src)];
|
||
} else {
|
||
ch = pageZero[byte];
|
||
}
|
||
if ((ch == 0) && (byte != 0)) {
|
||
if (flags & TCL_ENCODING_STOPONERROR) {
|
||
result = TCL_CONVERT_SYNTAX;
|
||
break;
|
||
}
|
||
if (prefixBytes[byte]) {
|
||
src--;
|
||
}
|
||
ch = (Tcl_UniChar) byte;
|
||
}
|
||
|
||
/*
|
||
* Special case for 1-byte utf chars for speed.
|
||
*/
|
||
|
||
if (ch && ch < 0x80) {
|
||
*dst++ = (char) ch;
|
||
} else {
|
||
dst += Tcl_UniCharToUtf(ch, dst);
|
||
}
|
||
src++;
|
||
}
|
||
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* TableFromUtfProc --
|
||
*
|
||
* Convert from UTF-8 into the encoding specified by the
|
||
* TableEncodingData.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
TableFromUtfProc(
|
||
ClientData clientData, /* TableEncodingData that specifies
|
||
* encoding. */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
const char *srcStart, *srcEnd, *srcClose;
|
||
const char *dstStart, *dstEnd, *prefixBytes;
|
||
Tcl_UniChar ch = 0;
|
||
int result, len, word, numChars;
|
||
TableEncodingData *dataPtr = (TableEncodingData *)clientData;
|
||
const unsigned short *const *fromUnicode;
|
||
|
||
result = TCL_OK;
|
||
|
||
prefixBytes = dataPtr->prefixBytes;
|
||
fromUnicode = (const unsigned short *const *) dataPtr->fromUnicode;
|
||
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
srcClose = srcEnd;
|
||
if ((flags & TCL_ENCODING_END) == 0) {
|
||
srcClose -= TCL_UTF_MAX;
|
||
}
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - 1;
|
||
|
||
for (numChars = 0; src < srcEnd; numChars++) {
|
||
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
||
/*
|
||
* If there is more string to follow, this will ensure that the
|
||
* last UTF-8 character in the source buffer hasn't been cut off.
|
||
*/
|
||
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
break;
|
||
}
|
||
len = TclUtfToUniChar(src, &ch);
|
||
|
||
#if TCL_UTF_MAX > 4
|
||
/* Unicode chars > +U0FFFF cannot be represented in any table encoding */
|
||
if (ch & 0xFFFF0000) {
|
||
word = 0;
|
||
} else
|
||
#elif TCL_UTF_MAX == 4
|
||
if (!len) {
|
||
word = 0;
|
||
} else
|
||
#endif
|
||
word = fromUnicode[(ch >> 8)][ch & 0xFF];
|
||
|
||
if ((word == 0) && (ch != 0)) {
|
||
if (flags & TCL_ENCODING_STOPONERROR) {
|
||
result = TCL_CONVERT_UNKNOWN;
|
||
break;
|
||
}
|
||
word = dataPtr->fallback;
|
||
}
|
||
if (prefixBytes[(word >> 8)] != 0) {
|
||
if (dst + 1 > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
dst[0] = (char) (word >> 8);
|
||
dst[1] = (char) word;
|
||
dst += 2;
|
||
} else {
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
dst[0] = (char) word;
|
||
dst++;
|
||
}
|
||
src += len;
|
||
}
|
||
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Iso88591ToUtfProc --
|
||
*
|
||
* Convert from the "iso8859-1" encoding into UTF-8.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
Iso88591ToUtfProc(
|
||
ClientData clientData, /* Ignored. */
|
||
const char *src, /* Source string in specified encoding. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
const char *srcStart, *srcEnd;
|
||
const char *dstEnd, *dstStart;
|
||
int result, numChars, charLimit = INT_MAX;
|
||
|
||
if (flags & TCL_ENCODING_CHAR_LIMIT) {
|
||
charLimit = *dstCharsPtr;
|
||
}
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - TCL_UTF_MAX;
|
||
|
||
result = TCL_OK;
|
||
for (numChars = 0; src < srcEnd && numChars <= charLimit; numChars++) {
|
||
Tcl_UniChar ch = 0;
|
||
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
ch = (Tcl_UniChar) *((unsigned char *) src);
|
||
|
||
/*
|
||
* Special case for 1-byte utf chars for speed.
|
||
*/
|
||
|
||
if (ch && ch < 0x80) {
|
||
*dst++ = (char) ch;
|
||
} else {
|
||
dst += Tcl_UniCharToUtf(ch, dst);
|
||
}
|
||
src++;
|
||
}
|
||
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* Iso88591FromUtfProc --
|
||
*
|
||
* Convert from UTF-8 into the encoding "iso8859-1".
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
Iso88591FromUtfProc(
|
||
ClientData clientData, /* Ignored. */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
const char *srcStart, *srcEnd, *srcClose;
|
||
const char *dstStart, *dstEnd;
|
||
int result = TCL_OK, numChars;
|
||
Tcl_UniChar ch = 0;
|
||
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
srcClose = srcEnd;
|
||
if ((flags & TCL_ENCODING_END) == 0) {
|
||
srcClose -= TCL_UTF_MAX;
|
||
}
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - 1;
|
||
|
||
for (numChars = 0; src < srcEnd; numChars++) {
|
||
int len;
|
||
|
||
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
||
/*
|
||
* If there is more string to follow, this will ensure that the
|
||
* last UTF-8 character in the source buffer hasn't been cut off.
|
||
*/
|
||
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
break;
|
||
}
|
||
len = TclUtfToUniChar(src, &ch);
|
||
|
||
/*
|
||
* Check for illegal characters.
|
||
*/
|
||
|
||
if (ch > 0xFF
|
||
#if TCL_UTF_MAX == 4
|
||
|| ((ch >= 0xD800) && (len < 3))
|
||
#endif
|
||
) {
|
||
if (flags & TCL_ENCODING_STOPONERROR) {
|
||
result = TCL_CONVERT_UNKNOWN;
|
||
break;
|
||
}
|
||
#if TCL_UTF_MAX == 4
|
||
if ((ch >= 0xD800) && (len < 3)) {
|
||
len = 4;
|
||
}
|
||
#endif
|
||
/*
|
||
* Plunge on, using '?' as a fallback character.
|
||
*/
|
||
|
||
ch = (Tcl_UniChar) '?';
|
||
}
|
||
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
*(dst++) = (char) ch;
|
||
src += len;
|
||
}
|
||
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* TableFreeProc --
|
||
*
|
||
* This function is invoked when an encoding is deleted. It deletes the
|
||
* memory used by the TableEncodingData.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Memory freed.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
TableFreeProc(
|
||
ClientData clientData) /* TableEncodingData that specifies
|
||
* encoding. */
|
||
{
|
||
TableEncodingData *dataPtr = (TableEncodingData *) clientData;
|
||
|
||
/*
|
||
* Make sure we aren't freeing twice on shutdown. [Bug 219314]
|
||
*/
|
||
|
||
ckfree(dataPtr->toUnicode);
|
||
dataPtr->toUnicode = NULL;
|
||
ckfree(dataPtr->fromUnicode);
|
||
dataPtr->fromUnicode = NULL;
|
||
ckfree(dataPtr);
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* EscapeToUtfProc --
|
||
*
|
||
* Convert from the encoding specified by the EscapeEncodingData into
|
||
* UTF-8.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
EscapeToUtfProc(
|
||
ClientData clientData, /* EscapeEncodingData that specifies
|
||
* encoding. */
|
||
const char *src, /* Source string in specified encoding. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
EscapeEncodingData *dataPtr = (EscapeEncodingData *) clientData;
|
||
const char *prefixBytes, *tablePrefixBytes, *srcStart, *srcEnd;
|
||
const unsigned short *const *tableToUnicode;
|
||
const Encoding *encodingPtr;
|
||
int state, result, numChars, charLimit = INT_MAX;
|
||
const char *dstStart, *dstEnd;
|
||
|
||
if (flags & TCL_ENCODING_CHAR_LIMIT) {
|
||
charLimit = *dstCharsPtr;
|
||
}
|
||
result = TCL_OK;
|
||
tablePrefixBytes = NULL;
|
||
tableToUnicode = NULL;
|
||
prefixBytes = dataPtr->prefixBytes;
|
||
encodingPtr = NULL;
|
||
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - TCL_UTF_MAX;
|
||
|
||
state = PTR2INT(*statePtr);
|
||
if (flags & TCL_ENCODING_START) {
|
||
state = 0;
|
||
}
|
||
|
||
for (numChars = 0; src < srcEnd && numChars <= charLimit; ) {
|
||
int byte, hi, lo, ch;
|
||
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
byte = *((unsigned char *) src);
|
||
if (prefixBytes[byte]) {
|
||
unsigned left, len, longest;
|
||
int checked, i;
|
||
const EscapeSubTable *subTablePtr;
|
||
|
||
/*
|
||
* Saw the beginning of an escape sequence.
|
||
*/
|
||
|
||
left = srcEnd - src;
|
||
len = dataPtr->initLen;
|
||
longest = len;
|
||
checked = 0;
|
||
|
||
if (len <= left) {
|
||
checked++;
|
||
if ((len > 0) && (memcmp(src, dataPtr->init, len) == 0)) {
|
||
/*
|
||
* If we see initialization string, skip it, even if we're
|
||
* not at the beginning of the buffer.
|
||
*/
|
||
|
||
src += len;
|
||
continue;
|
||
}
|
||
}
|
||
|
||
len = dataPtr->finalLen;
|
||
if (len > longest) {
|
||
longest = len;
|
||
}
|
||
|
||
if (len <= left) {
|
||
checked++;
|
||
if ((len > 0) && (memcmp(src, dataPtr->final, len) == 0)) {
|
||
/*
|
||
* If we see finalization string, skip it, even if we're
|
||
* not at the end of the buffer.
|
||
*/
|
||
|
||
src += len;
|
||
continue;
|
||
}
|
||
}
|
||
|
||
subTablePtr = dataPtr->subTables;
|
||
for (i = 0; i < dataPtr->numSubTables; i++) {
|
||
len = subTablePtr->sequenceLen;
|
||
if (len > longest) {
|
||
longest = len;
|
||
}
|
||
if (len <= left) {
|
||
checked++;
|
||
if ((len > 0) &&
|
||
(memcmp(src, subTablePtr->sequence, len) == 0)) {
|
||
state = i;
|
||
encodingPtr = NULL;
|
||
subTablePtr = NULL;
|
||
src += len;
|
||
break;
|
||
}
|
||
}
|
||
subTablePtr++;
|
||
}
|
||
|
||
if (subTablePtr == NULL) {
|
||
/*
|
||
* A match was found, the escape sequence was consumed, and
|
||
* the state was updated.
|
||
*/
|
||
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* We have a split-up or unrecognized escape sequence. If we
|
||
* checked all the sequences, then it's a syntax error, otherwise
|
||
* we need more bytes to determine a match.
|
||
*/
|
||
|
||
if ((checked == dataPtr->numSubTables + 2)
|
||
|| (flags & TCL_ENCODING_END)) {
|
||
if ((flags & TCL_ENCODING_STOPONERROR) == 0) {
|
||
/*
|
||
* Skip the unknown escape sequence.
|
||
*/
|
||
|
||
src += longest;
|
||
continue;
|
||
}
|
||
result = TCL_CONVERT_SYNTAX;
|
||
} else {
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
}
|
||
break;
|
||
}
|
||
|
||
if (encodingPtr == NULL) {
|
||
TableEncodingData *tableDataPtr;
|
||
|
||
encodingPtr = GetTableEncoding(dataPtr, state);
|
||
tableDataPtr = (TableEncodingData *)encodingPtr->clientData;
|
||
tablePrefixBytes = tableDataPtr->prefixBytes;
|
||
tableToUnicode = (const unsigned short *const*)
|
||
tableDataPtr->toUnicode;
|
||
}
|
||
|
||
if (tablePrefixBytes[byte]) {
|
||
src++;
|
||
if (src >= srcEnd) {
|
||
src--;
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
break;
|
||
}
|
||
hi = byte;
|
||
lo = *((unsigned char *) src);
|
||
} else {
|
||
hi = 0;
|
||
lo = byte;
|
||
}
|
||
|
||
ch = tableToUnicode[hi][lo];
|
||
dst += Tcl_UniCharToUtf(ch, dst);
|
||
src++;
|
||
numChars++;
|
||
}
|
||
|
||
*statePtr = (Tcl_EncodingState) INT2PTR(state);
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* EscapeFromUtfProc --
|
||
*
|
||
* Convert from UTF-8 into the encoding specified by the
|
||
* EscapeEncodingData.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK if conversion was successful.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
EscapeFromUtfProc(
|
||
ClientData clientData, /* EscapeEncodingData that specifies
|
||
* encoding. */
|
||
const char *src, /* Source string in UTF-8. */
|
||
int srcLen, /* Source string length in bytes. */
|
||
int flags, /* Conversion control flags. */
|
||
Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
|
||
* information used during a piecewise
|
||
* conversion. Contents of statePtr are
|
||
* initialized and/or reset by conversion
|
||
* routine under control of flags argument. */
|
||
char *dst, /* Output buffer in which converted string is
|
||
* stored. */
|
||
int dstLen, /* The maximum length of output buffer in
|
||
* bytes. */
|
||
int *srcReadPtr, /* Filled with the number of bytes from the
|
||
* source string that were converted. This may
|
||
* be less than the original source length if
|
||
* there was a problem converting some source
|
||
* characters. */
|
||
int *dstWrotePtr, /* Filled with the number of bytes that were
|
||
* stored in the output buffer as a result of
|
||
* the conversion. */
|
||
int *dstCharsPtr) /* Filled with the number of characters that
|
||
* correspond to the bytes stored in the
|
||
* output buffer. */
|
||
{
|
||
EscapeEncodingData *dataPtr = (EscapeEncodingData *)clientData;
|
||
const Encoding *encodingPtr;
|
||
const char *srcStart, *srcEnd, *srcClose;
|
||
const char *dstStart, *dstEnd;
|
||
int state, result, numChars;
|
||
const TableEncodingData *tableDataPtr;
|
||
const char *tablePrefixBytes;
|
||
const unsigned short *const *tableFromUnicode;
|
||
Tcl_UniChar ch = 0;
|
||
|
||
result = TCL_OK;
|
||
|
||
srcStart = src;
|
||
srcEnd = src + srcLen;
|
||
srcClose = srcEnd;
|
||
if ((flags & TCL_ENCODING_END) == 0) {
|
||
srcClose -= TCL_UTF_MAX;
|
||
}
|
||
|
||
dstStart = dst;
|
||
dstEnd = dst + dstLen - 1;
|
||
|
||
/*
|
||
* RFC 1468 states that the text starts in ASCII, and switches to Japanese
|
||
* characters, and that the text must end in ASCII. [Patch 474358]
|
||
*/
|
||
|
||
if (flags & TCL_ENCODING_START) {
|
||
state = 0;
|
||
if ((dst + dataPtr->initLen) > dstEnd) {
|
||
*srcReadPtr = 0;
|
||
*dstWrotePtr = 0;
|
||
return TCL_CONVERT_NOSPACE;
|
||
}
|
||
memcpy(dst, dataPtr->init, dataPtr->initLen);
|
||
dst += dataPtr->initLen;
|
||
} else {
|
||
state = PTR2INT(*statePtr);
|
||
}
|
||
|
||
encodingPtr = GetTableEncoding(dataPtr, state);
|
||
tableDataPtr = (const TableEncodingData *)encodingPtr->clientData;
|
||
tablePrefixBytes = tableDataPtr->prefixBytes;
|
||
tableFromUnicode = (const unsigned short *const *)
|
||
tableDataPtr->fromUnicode;
|
||
|
||
for (numChars = 0; src < srcEnd; numChars++) {
|
||
unsigned len;
|
||
int word;
|
||
|
||
if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
|
||
/*
|
||
* If there is more string to follow, this will ensure that the
|
||
* last UTF-8 character in the source buffer hasn't been cut off.
|
||
*/
|
||
|
||
result = TCL_CONVERT_MULTIBYTE;
|
||
break;
|
||
}
|
||
len = TclUtfToUniChar(src, &ch);
|
||
word = tableFromUnicode[(ch >> 8)][ch & 0xFF];
|
||
|
||
if ((word == 0) && (ch != 0)) {
|
||
int oldState;
|
||
const EscapeSubTable *subTablePtr;
|
||
|
||
oldState = state;
|
||
for (state = 0; state < dataPtr->numSubTables; state++) {
|
||
encodingPtr = GetTableEncoding(dataPtr, state);
|
||
tableDataPtr = (const TableEncodingData *)encodingPtr->clientData;
|
||
word = tableDataPtr->fromUnicode[(ch >> 8)][ch & 0xFF];
|
||
if (word != 0) {
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (word == 0) {
|
||
state = oldState;
|
||
if (flags & TCL_ENCODING_STOPONERROR) {
|
||
result = TCL_CONVERT_UNKNOWN;
|
||
break;
|
||
}
|
||
encodingPtr = GetTableEncoding(dataPtr, state);
|
||
tableDataPtr = (const TableEncodingData *)encodingPtr->clientData;
|
||
word = tableDataPtr->fallback;
|
||
}
|
||
|
||
tablePrefixBytes = (const char *) tableDataPtr->prefixBytes;
|
||
tableFromUnicode = (const unsigned short *const *)
|
||
tableDataPtr->fromUnicode;
|
||
|
||
/*
|
||
* The state variable has the value of oldState when word is 0.
|
||
* In this case, the escape sequence should not be copied to dst
|
||
* because the current character set is not changed.
|
||
*/
|
||
|
||
if (state != oldState) {
|
||
subTablePtr = &dataPtr->subTables[state];
|
||
if ((dst + subTablePtr->sequenceLen) > dstEnd) {
|
||
/*
|
||
* If there is no space to write the escape sequence, the
|
||
* state variable must be changed to the value of oldState
|
||
* variable because this escape sequence must be written
|
||
* in the next conversion.
|
||
*/
|
||
|
||
state = oldState;
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
memcpy(dst, subTablePtr->sequence,
|
||
subTablePtr->sequenceLen);
|
||
dst += subTablePtr->sequenceLen;
|
||
}
|
||
}
|
||
|
||
if (tablePrefixBytes[(word >> 8)] != 0) {
|
||
if (dst + 1 > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
dst[0] = (char) (word >> 8);
|
||
dst[1] = (char) word;
|
||
dst += 2;
|
||
} else {
|
||
if (dst > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
break;
|
||
}
|
||
dst[0] = (char) word;
|
||
dst++;
|
||
}
|
||
src += len;
|
||
}
|
||
|
||
if ((result == TCL_OK) && (flags & TCL_ENCODING_END)) {
|
||
unsigned len = dataPtr->subTables[0].sequenceLen;
|
||
|
||
/*
|
||
* Certain encodings like iso2022-jp need to write an escape sequence
|
||
* after all characters have been converted. This logic checks that
|
||
* enough room is available in the buffer for the escape bytes. The
|
||
* TCL_ENCODING_END flag is cleared after a final escape sequence has
|
||
* been added to the buffer so that another call to this method does
|
||
* not attempt to append escape bytes a second time.
|
||
*/
|
||
|
||
if ((dst + dataPtr->finalLen + (state?len:0)) > dstEnd) {
|
||
result = TCL_CONVERT_NOSPACE;
|
||
} else {
|
||
if (state) {
|
||
memcpy(dst, dataPtr->subTables[0].sequence, len);
|
||
dst += len;
|
||
}
|
||
memcpy(dst, dataPtr->final, dataPtr->finalLen);
|
||
dst += dataPtr->finalLen;
|
||
state &= ~TCL_ENCODING_END;
|
||
}
|
||
}
|
||
|
||
*statePtr = (Tcl_EncodingState) INT2PTR(state);
|
||
*srcReadPtr = src - srcStart;
|
||
*dstWrotePtr = dst - dstStart;
|
||
*dstCharsPtr = numChars;
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* EscapeFreeProc --
|
||
*
|
||
* Frees resources used by the encoding.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Memory is freed.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
EscapeFreeProc(
|
||
ClientData clientData) /* EscapeEncodingData that specifies
|
||
* encoding. */
|
||
{
|
||
EscapeEncodingData *dataPtr = (EscapeEncodingData *)clientData;
|
||
EscapeSubTable *subTablePtr;
|
||
int i;
|
||
|
||
if (dataPtr == NULL) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* The subTables should be freed recursively in normal operation but not
|
||
* during TclFinalizeEncodingSubsystem because they are also present as a
|
||
* weak reference in the toplevel encodingTable (i.e., they don't have a
|
||
* +1 refcount for this), and unpredictable nuking order could remove them
|
||
* from under the following loop's feet. [Bug 2891556]
|
||
*
|
||
* The encodingsInitialized flag, being reset on entry to TFES, can serve
|
||
* as a "not in finalization" test.
|
||
*/
|
||
|
||
if (encodingsInitialized) {
|
||
subTablePtr = dataPtr->subTables;
|
||
for (i = 0; i < dataPtr->numSubTables; i++) {
|
||
FreeEncoding((Tcl_Encoding) subTablePtr->encodingPtr);
|
||
subTablePtr->encodingPtr = NULL;
|
||
subTablePtr++;
|
||
}
|
||
}
|
||
ckfree(dataPtr);
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* GetTableEncoding --
|
||
*
|
||
* Helper function for the EscapeEncodingData conversions. Gets the
|
||
* encoding (of type TextEncodingData) that represents the specified
|
||
* state.
|
||
*
|
||
* Results:
|
||
* The return value is the encoding.
|
||
*
|
||
* Side effects:
|
||
* If the encoding that represents the specified state has not already
|
||
* been used by this EscapeEncoding, it will be loaded and cached in the
|
||
* dataPtr.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static Encoding *
|
||
GetTableEncoding(
|
||
EscapeEncodingData *dataPtr,/* Contains names of encodings. */
|
||
int state) /* Index in dataPtr of desired Encoding. */
|
||
{
|
||
EscapeSubTable *subTablePtr = &dataPtr->subTables[state];
|
||
Encoding *encodingPtr = subTablePtr->encodingPtr;
|
||
|
||
if (encodingPtr == NULL) {
|
||
encodingPtr = (Encoding *) Tcl_GetEncoding(NULL, subTablePtr->name);
|
||
if ((encodingPtr == NULL)
|
||
|| (encodingPtr->toUtfProc != TableToUtfProc
|
||
&& encodingPtr->toUtfProc != Iso88591ToUtfProc)) {
|
||
Tcl_Panic("EscapeToUtfProc: invalid sub table");
|
||
}
|
||
subTablePtr->encodingPtr = encodingPtr;
|
||
}
|
||
|
||
return encodingPtr;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* unilen --
|
||
*
|
||
* A helper function for the Tcl_ExternalToUtf functions. This function
|
||
* is similar to strlen for double-byte characters: it returns the number
|
||
* of bytes in a 0x0000 terminated string.
|
||
*
|
||
* Results:
|
||
* As above.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static size_t
|
||
unilen(
|
||
const char *src)
|
||
{
|
||
unsigned short *p;
|
||
|
||
p = (unsigned short *) src;
|
||
while (*p != 0x0000) {
|
||
p++;
|
||
}
|
||
return (char *) p - src;
|
||
}
|
||
|
||
/*
|
||
*-------------------------------------------------------------------------
|
||
*
|
||
* InitializeEncodingSearchPath --
|
||
*
|
||
* This is the fallback routine that sets the default value of the
|
||
* encoding search path if the application has not set one via a call to
|
||
* Tcl_SetEncodingSearchPath() by the first time the search path is needed
|
||
* to load encoding data.
|
||
*
|
||
* The default encoding search path is produced by taking each directory
|
||
* in the library path, appending a subdirectory named "encoding", and if
|
||
* the resulting directory exists, adding it to the encoding search path.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Sets the encoding search path to an initial value.
|
||
*
|
||
*-------------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
InitializeEncodingSearchPath(
|
||
char **valuePtr,
|
||
int *lengthPtr,
|
||
Tcl_Encoding *encodingPtr)
|
||
{
|
||
const char *bytes;
|
||
int i, numDirs, numBytes;
|
||
Tcl_Obj *libPathObj, *encodingObj, *searchPathObj;
|
||
|
||
TclNewLiteralStringObj(encodingObj, "encoding");
|
||
TclNewObj(searchPathObj);
|
||
Tcl_IncrRefCount(encodingObj);
|
||
Tcl_IncrRefCount(searchPathObj);
|
||
libPathObj = TclGetLibraryPath();
|
||
Tcl_IncrRefCount(libPathObj);
|
||
Tcl_ListObjLength(NULL, libPathObj, &numDirs);
|
||
|
||
for (i = 0; i < numDirs; i++) {
|
||
Tcl_Obj *directoryObj, *pathObj;
|
||
Tcl_StatBuf stat;
|
||
|
||
Tcl_ListObjIndex(NULL, libPathObj, i, &directoryObj);
|
||
pathObj = Tcl_FSJoinToPath(directoryObj, 1, &encodingObj);
|
||
Tcl_IncrRefCount(pathObj);
|
||
if ((0 == Tcl_FSStat(pathObj, &stat)) && S_ISDIR(stat.st_mode)) {
|
||
Tcl_ListObjAppendElement(NULL, searchPathObj, pathObj);
|
||
}
|
||
Tcl_DecrRefCount(pathObj);
|
||
}
|
||
|
||
Tcl_DecrRefCount(libPathObj);
|
||
Tcl_DecrRefCount(encodingObj);
|
||
*encodingPtr = libraryPath.encoding;
|
||
if (*encodingPtr) {
|
||
((Encoding *)(*encodingPtr))->refCount++;
|
||
}
|
||
bytes = Tcl_GetStringFromObj(searchPathObj, &numBytes);
|
||
|
||
*lengthPtr = numBytes;
|
||
*valuePtr = (char *)ckalloc(numBytes + 1);
|
||
memcpy(*valuePtr, bytes, numBytes + 1);
|
||
Tcl_DecrRefCount(searchPathObj);
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* mode: c
|
||
* c-basic-offset: 4
|
||
* fill-column: 78
|
||
* End:
|
||
*/
|