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-rw-r--r--generic/tclUnicodeObj.c771
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diff --git a/generic/tclUnicodeObj.c b/generic/tclUnicodeObj.c
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+/*
+ * tclUnicodeObj.c --
+ *
+ * This file contains the implementation of the Unicode internal
+ * representation of Tcl objects.
+ *
+ * Copyright (c) 1999 by Scriptics Corporation.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * RCS: @(#) $Id: tclUnicodeObj.c,v 1.2 1999/06/08 02:59:27 hershey Exp $
+ */
+
+#include <math.h>
+#include "tclInt.h"
+#include "tclPort.h"
+
+/*
+ * Prototypes for local procedures defined in this file:
+ */
+
+static void DupUnicodeInternalRep _ANSI_ARGS_((Tcl_Obj *srcPtr,
+ Tcl_Obj *copyPtr));
+static void FreeUnicodeInternalRep _ANSI_ARGS_((Tcl_Obj *objPtr));
+static void UpdateStringOfUnicode _ANSI_ARGS_((Tcl_Obj *objPtr));
+static int SetUnicodeFromAny _ANSI_ARGS_((Tcl_Interp *interp,
+ Tcl_Obj *objPtr));
+
+static int AllSingleByteChars _ANSI_ARGS_((Tcl_Obj *objPtr));
+static void TclAppendUniCharStrToObj _ANSI_ARGS_((
+ register Tcl_Obj *objPtr, Tcl_UniChar *unichars,
+ int numChars));
+static Tcl_Obj * TclNewUnicodeObj _ANSI_ARGS_((Tcl_UniChar *unichars,
+ int numChars));
+static void SetOptUnicodeFromAny _ANSI_ARGS_((Tcl_Obj *objPtr,
+ int numChars));
+
+/*
+ * The following object type represents a Unicode string. A Unicode string
+ * is an internationalized string. Conceptually, a Unicode string is an
+ * array of 16-bit quantities organized as a sequence of properly formed
+ * UTF-8 characters. There is a one-to-one map between Unicode and UTF
+ * characters. The Unicode ojbect is opitmized for the case where each UTF
+ * char in a string is only one byte. In this case, we store the value of
+ * numChars, but we don't copy the bytes to the unicodeObj->chars. Before
+ * accessing obj->chars, check if unicodeObj->numChars == obj->length.
+ */
+
+Tcl_ObjType tclUnicodeType = {
+ "unicode",
+ FreeUnicodeInternalRep,
+ DupUnicodeInternalRep,
+ UpdateStringOfUnicode,
+ SetUnicodeFromAny
+};
+
+/*
+ * The following structure is the internal rep for a Unicode object.
+ * Keeps track of how much memory has been used and how much has been
+ * allocated for the Unicode to enable growing and shrinking of the
+ * Unicode object with fewer mallocs.
+ */
+
+typedef struct Unicode {
+ int numChars; /* The number of chars in the unicode
+ * string. */
+ int used; /* The number of bytes used in the unicode
+ * string. */
+ int allocated; /* The amount of space actually allocated
+ * minus 1 byte. */
+ unsigned char chars[4]; /* The array of chars. The actual size of
+ * this field depends on the 'allocated' field
+ * above. */
+} Unicode;
+
+#define UNICODE_SIZE(len) \
+ ((unsigned) (sizeof(Unicode) - 4 + (len)))
+#define GET_UNICODE(objPtr) \
+ ((Unicode *) (objPtr)->internalRep.otherValuePtr)
+#define SET_UNICODE(objPtr, unicodePtr) \
+ (objPtr)->internalRep.otherValuePtr = (VOID *) (unicodePtr)
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclGetUnicodeLengthFromObj --
+ *
+ * Get the length of the Unicode string from the Tcl object. If
+ * the object is not already a Unicode object, an attempt will be
+ * made to convert it to one.
+ *
+ * Results:
+ * Pointer to unicode string representing the unicode object.
+ *
+ * Side effects:
+ * Frees old internal rep. Allocates memory for new internal rep.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclGetUnicodeLengthFromObj(objPtr)
+ Tcl_Obj *objPtr; /* The Unicode object. */
+{
+ int length;
+ Unicode *unicodePtr;
+
+ SetUnicodeFromAny(NULL, objPtr);
+ unicodePtr = GET_UNICODE(objPtr);
+
+ length = unicodePtr->numChars;
+ return length;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclGetUniCharFromObj --
+ *
+ * Get the index'th Unicode character from the Unicode object. If
+ * the object is not already a Unicode object, an attempt will be
+ * made to convert it to one. The index is assumed to be in the
+ * appropriate range.
+ *
+ * Results:
+ * Returns the index'th Unicode character in the Object.
+ *
+ * Side effects:
+ * Fills unichar with the index'th Unicode character.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_UniChar
+TclGetUniCharFromObj(objPtr, index)
+ Tcl_Obj *objPtr; /* The Unicode object. */
+ int index; /* Get the index'th character. */
+{
+ Tcl_UniChar *unicharPtr, unichar;
+ Unicode *unicodePtr;
+ int length;
+
+ SetUnicodeFromAny(NULL, objPtr);
+ unicodePtr = GET_UNICODE(objPtr);
+ length = objPtr->length;
+
+ if (AllSingleByteChars(objPtr)) {
+ int length;
+ char *str;
+
+ /*
+ * All of the characters in the Utf string are 1 byte chars,
+ * so we don't store the unicode char. We get the Utf string
+ * and convert the index'th byte to a Unicode character.
+ */
+
+ str = Tcl_GetStringFromObj(objPtr, &length);
+ Tcl_UtfToUniChar(&str[index], &unichar);
+ } else {
+ unicharPtr = (Tcl_UniChar *)unicodePtr->chars;
+ unichar = unicharPtr[index];
+ }
+ return unichar;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclGetRangeFromObj --
+ *
+ * Create a Tcl Object that contains the chars between first and
+ * last of the object indicated by "objPtr". If the object is not
+ * already a Unicode object, an attempt will be made to convert it
+ * to one. The first and last indices are assumed to be in the
+ * appropriate range.
+ *
+ * Results:
+ * Returns a new Tcl Object of either "string" or "unicode" type,
+ * containing the range of chars.
+ *
+ * Side effects:
+ * Changes the internal rep of "objPtr" to unicode.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Obj*
+TclGetRangeFromObj(objPtr, first, last)
+
+ Tcl_Obj *objPtr; /* The Tcl object to find the range of. */
+ int first; /* First index of the range. */
+ int last; /* Last index of the range. */
+{
+ Tcl_Obj *newObjPtr; /* The Tcl object to find the range of. */
+ Tcl_UniChar *unicharPtr;
+ Unicode *unicodePtr;
+ int length;
+
+ SetUnicodeFromAny(NULL, objPtr);
+ unicodePtr = GET_UNICODE(objPtr);
+ length = objPtr->length;
+
+ if (unicodePtr->numChars != length) {
+ unicharPtr = (Tcl_UniChar *)unicodePtr->chars;
+ newObjPtr = TclNewUnicodeObj(&unicharPtr[first], last-first+1);
+ } else {
+ int length;
+ char *str;
+
+ /*
+ * All of the characters in the Utf string are 1 byte chars,
+ * so we don't store the unicode char. Create a new string
+ * object containing the specified range of chars.
+ */
+
+ str = Tcl_GetStringFromObj(objPtr, &length);
+ newObjPtr = Tcl_NewStringObj(&str[first], last-first+1);
+ }
+ return newObjPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclAppendObjToUnicodeObj --
+ *
+ * This procedure appends the contest of "srcObjPtr" to the Unicode
+ * object "destPtr".
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * If srcObjPtr doesn't have an internal rep, then it is given a
+ * Unicode internal rep.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_Obj *
+TclAppendObjToUnicodeObj(targetObjPtr, srcObjPtr)
+ register Tcl_Obj *targetObjPtr; /* Points to the object to
+ * append to. */
+ register Tcl_Obj *srcObjPtr; /* Points to the object to
+ * append from. */
+{
+ int numBytes, numChars;
+ Tcl_Obj *resultObjPtr;
+ char *utfSrcStr;
+ Tcl_UniChar *unicharSrcStr;
+ Unicode *unicodePtr;
+ Tcl_DString dsPtr;
+
+ /*
+ * Duplicate the target if it is shared.
+ * Change the result's internal rep to Unicode object.
+ */
+
+ if (Tcl_IsShared(targetObjPtr)) {
+ resultObjPtr = Tcl_DuplicateObj(targetObjPtr);
+ } else {
+ resultObjPtr = targetObjPtr;
+ }
+ SetUnicodeFromAny(NULL, resultObjPtr);
+
+ /*
+ * Case where target chars are 1 byte long:
+ * If src obj is of "string" or null type, then convert it to "unicode"
+ * type. Src objs of other types (such as int) are left in tact to keep
+ * them from shimmering between types. If the src obj is a unichar obj,
+ * and all src chars are also 1 byte long, the src string is appended to
+ * the target "unicode" obj, and the target obj maintains its "optimized"
+ * status.
+ */
+
+ if (AllSingleByteChars(resultObjPtr)) {
+
+ int length;
+ char *stringRep;
+
+ if (srcObjPtr->typePtr == &tclStringType
+ || srcObjPtr->typePtr == NULL) {
+ SetUnicodeFromAny(NULL, srcObjPtr);
+ }
+
+ stringRep = Tcl_GetStringFromObj(srcObjPtr, &length);
+ Tcl_AppendToObj(resultObjPtr, stringRep, length);
+
+ if ((srcObjPtr->typePtr == &tclUnicodeType)
+ && (AllSingleByteChars(srcObjPtr))) {
+ SetOptUnicodeFromAny(resultObjPtr, resultObjPtr->length);
+ }
+ return resultObjPtr;
+ }
+
+ /*
+ * Extract a unicode string from "unicode" or "string" type objects.
+ * Extract the utf string from non-unicode objects, and convert the
+ * utf string to unichar string locally.
+ * If the src obj is a "string" obj, convert it to "unicode" type.
+ * Src objs of other types (such as int) are left in tact to keep
+ * them from shimmering between types.
+ */
+
+ Tcl_DStringInit(&dsPtr);
+ if (srcObjPtr->typePtr == &tclStringType || srcObjPtr->typePtr == NULL) {
+ SetUnicodeFromAny(NULL, srcObjPtr);
+ }
+ if (srcObjPtr->typePtr == &tclUnicodeType) {
+ if (AllSingleByteChars(srcObjPtr)) {
+
+ unicodePtr = GET_UNICODE(srcObjPtr);
+ numChars = unicodePtr->numChars;
+
+ utfSrcStr = Tcl_GetStringFromObj(srcObjPtr, &numBytes);
+ unicharSrcStr = (Tcl_UniChar *)Tcl_UtfToUniCharDString(utfSrcStr,
+ numBytes, &dsPtr);
+ } else {
+ unicodePtr = GET_UNICODE(srcObjPtr);
+ numChars = unicodePtr->numChars;
+ unicharSrcStr = (Tcl_UniChar *)unicodePtr->chars;
+ }
+ } else {
+ utfSrcStr = Tcl_GetStringFromObj(srcObjPtr, &numBytes);
+ numChars = Tcl_NumUtfChars(utfSrcStr, numBytes);
+ unicharSrcStr = (Tcl_UniChar *)Tcl_UtfToUniCharDString(utfSrcStr,
+ numBytes, &dsPtr);
+ }
+ if (numChars == 0) {
+ return resultObjPtr;
+ }
+
+ /*
+ * Append the unichar src string to the result object.
+ */
+
+ TclAppendUniCharStrToObj(resultObjPtr, unicharSrcStr, numChars);
+ Tcl_DStringFree(&dsPtr);
+ return resultObjPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclAppendUniCharStrToObj --
+ *
+ * This procedure appends the contents of "srcObjPtr" to the
+ * Unicode object "objPtr".
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * If srcObjPtr doesn't have an internal rep, then it is given a
+ * Unicode internal rep.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TclAppendUniCharStrToObj(objPtr, unichars, numNewChars)
+ register Tcl_Obj *objPtr; /* Points to the object to append to. */
+ Tcl_UniChar *unichars; /* The unicode string to append to the
+ * object. */
+ int numNewChars; /* Number of chars in "unichars". */
+{
+ Unicode *unicodePtr;
+ int usedBytes, numNewBytes, totalNumBytes, totalNumChars;
+
+ /*
+ * Invalidate the StringRep.
+ */
+
+ Tcl_InvalidateStringRep(objPtr);
+
+ unicodePtr = GET_UNICODE(objPtr);
+
+ usedBytes = unicodePtr->used;
+ totalNumChars = numNewChars + unicodePtr->numChars;
+ totalNumBytes = totalNumChars * sizeof(Tcl_UniChar);
+ numNewBytes = numNewChars * sizeof(Tcl_UniChar);
+
+ if (unicodePtr->allocated < totalNumBytes) {
+ int allocatedBytes = totalNumBytes * 2;
+
+ /*
+ * There isn't currently enough space in the Unicode
+ * representation so allocate additional space. In fact,
+ * overallocate so that there is room for future growth without
+ * having to reallocate again.
+ */
+
+ unicodePtr = (Unicode *) ckrealloc(unicodePtr,
+ UNICODE_SIZE(allocatedBytes));
+ memcpy((VOID *) (unicodePtr->chars + usedBytes),
+ (VOID *) unichars, (size_t) numNewBytes);
+
+ unicodePtr->allocated = allocatedBytes;
+ unicodePtr = SET_UNICODE(objPtr, unicodePtr);
+ }
+
+ memcpy((VOID *) (unicodePtr->chars + usedBytes),
+ (VOID *) unichars, (size_t) numNewBytes);
+ unicodePtr->used = totalNumBytes;
+ unicodePtr->numChars = totalNumChars;
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * TclNewUnicodeObj --
+ *
+ * This procedure is creates a new Unicode object and initializes
+ * it from the given Utf String. If the Utf String is the same size
+ * as the Unicode string, don't duplicate the data.
+ *
+ * Results:
+ * The newly created object is returned. This object will have no
+ * initial string representation. The returned object has a ref count
+ * of 0.
+ *
+ * Side effects:
+ * Memory allocated for new object and copy of Unicode argument.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+Tcl_Obj *
+TclNewUnicodeObj(unichars, numChars)
+ Tcl_UniChar *unichars; /* The unicode string used to initialize
+ * the new object. */
+ int numChars; /* Number of characters in the unicode
+ * string. */
+{
+ Tcl_Obj *objPtr;
+ Unicode *unicodePtr;
+ int numBytes;
+
+ numBytes = numChars * sizeof(Tcl_UniChar);
+
+ TclNewObj(objPtr);
+ objPtr->bytes = NULL;
+ objPtr->typePtr = &tclUnicodeType;
+
+ unicodePtr = (Unicode *) ckalloc(UNICODE_SIZE(numBytes));
+ unicodePtr->used = numBytes;
+ unicodePtr->numChars = numChars;
+ unicodePtr->allocated = numBytes;
+ memcpy((VOID *) unicodePtr->chars, (VOID *) unichars, (size_t) numBytes);
+ SET_UNICODE(objPtr, unicodePtr);
+ return objPtr;
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * TclAllSingleByteChars --
+ *
+ * Initialize the internal representation of a Unicode Tcl_Obj
+ * to a copy of the internal representation of an existing Unicode
+ * object.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Allocates memory.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+static int
+AllSingleByteChars(objPtr)
+ Tcl_Obj *objPtr; /* Object whose char lengths to check. */
+{
+ Unicode *unicodePtr;
+ int numBytes, numChars;
+
+ unicodePtr = GET_UNICODE(objPtr);
+ numChars = unicodePtr->numChars;
+ numBytes = objPtr->length;
+
+ if (numChars == numBytes) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * DupUnicodeInternalRep --
+ *
+ * Initialize the internal representation of a Unicode Tcl_Obj
+ * to a copy of the internal representation of an existing Unicode
+ * object.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Allocates memory.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+static void
+DupUnicodeInternalRep(srcPtr, copyPtr)
+ Tcl_Obj *srcPtr; /* Object with internal rep to copy. */
+ Tcl_Obj *copyPtr; /* Object with internal rep to set. */
+{
+ Unicode *srcUnicodePtr = GET_UNICODE(srcPtr);
+ Unicode *copyUnicodePtr; /*GET_UNICODE(copyPtr);*/
+
+ /*
+ * If the src obj is a string of 1-byte Utf chars, then copy the
+ * string rep of the source object and create an "empty" Unicode
+ * internal rep for the new object. Otherwise, copy Unicode
+ * internal rep, and invalidate the string rep of the new object.
+ */
+
+ if (AllSingleByteChars(srcPtr)) {
+ copyUnicodePtr = (Unicode *) ckalloc(UNICODE_SIZE(4));
+ } else {
+ int used = srcUnicodePtr->used;
+ int allocated = srcUnicodePtr->allocated;
+ Tcl_UniChar *unichars;
+
+ unichars = (Tcl_UniChar *)srcUnicodePtr->chars;
+
+ copyUnicodePtr = (Unicode *) ckalloc(UNICODE_SIZE(allocated));
+
+ copyUnicodePtr->used = used;
+ copyUnicodePtr->allocated = allocated;
+ memcpy((VOID *) copyUnicodePtr->chars,
+ (VOID *) srcUnicodePtr->chars, (size_t) used);
+ }
+ copyUnicodePtr->numChars = srcUnicodePtr->numChars;
+ SET_UNICODE(copyPtr, copyUnicodePtr);
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * TclSetUnicodeObj --
+ *
+ * Modify an object to be a Unicode object and to have the specified
+ * unicode string as its value.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The object's old string rep and internal rep is freed.
+ * Memory allocated for copy of unicode argument.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TclSetUnicodeObj(objPtr, chars, length)
+ Tcl_Obj *objPtr; /* Object to initialize as a Unicode obj. */
+ unsigned char *chars; /* The unicode string to use as the new
+ * value. */
+ int length; /* Length of the unicode string, which must
+ * be >= 0. */
+{
+ Tcl_ObjType *typePtr;
+ Unicode *unicodePtr;
+
+ if (Tcl_IsShared(objPtr)) {
+ panic("TclSetUnicodeObj called with shared object");
+ }
+ typePtr = objPtr->typePtr;
+ if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) {
+ (*typePtr->freeIntRepProc)(objPtr);
+ }
+ Tcl_InvalidateStringRep(objPtr);
+
+ unicodePtr = (Unicode *) ckalloc(UNICODE_SIZE(length));
+ unicodePtr->used = length;
+ unicodePtr->allocated = length;
+ memcpy((VOID *) unicodePtr->chars, (VOID *) chars, (size_t) length);
+
+ objPtr->typePtr = &tclUnicodeType;
+ SET_UNICODE(objPtr, unicodePtr);
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * UpdateStringOfUnicode --
+ *
+ * Update the string representation for a Unicode data object.
+ * Note: This procedure does not invalidate an existing old string rep
+ * so storage will be lost if this has not already been done.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The object's string is set to a valid string that results from
+ * the Unicode-to-string conversion.
+ *
+ * The object becomes a string object -- the internal rep is
+ * discarded and the typePtr becomes NULL.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+static void
+UpdateStringOfUnicode(objPtr)
+ Tcl_Obj *objPtr; /* Unicode object whose string rep to
+ * update. */
+{
+ int i, length, size;
+ Tcl_UniChar *src;
+ char dummy[TCL_UTF_MAX];
+ char *dst;
+ Unicode *unicodePtr;
+
+ unicodePtr = GET_UNICODE(objPtr);
+ src = (Tcl_UniChar *) unicodePtr->chars;
+ length = unicodePtr->used;
+
+ /*
+ * How much space will string rep need?
+ */
+
+ size = 0;
+ for (i = 0; i < unicodePtr->numChars; i++) {
+ size += Tcl_UniCharToUtf((int) src[i], dummy);
+ }
+
+ dst = (char *) ckalloc((unsigned) (size + 1));
+ objPtr->bytes = dst;
+ objPtr->length = size;
+
+ for (i = 0; i < unicodePtr->numChars; i++) {
+ dst += Tcl_UniCharToUtf(src[i], dst);
+ }
+ *dst = '\0';
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * SetOptUnicodeFromAny --
+ *
+ * Generate the Unicode internal rep from the string rep.
+ *
+ * Results:
+ * The return value is always TCL_OK.
+ *
+ * Side effects:
+ * A Unicode object is stored as the internal rep of objPtr. The Unicode
+ * ojbect is opitmized for the case where each UTF char in a string is only
+ * one byte. In this case, we store the value of numChars, but we don't copy
+ * the bytes to the unicodeObj->chars. Before accessing obj->chars, check if
+ * all chars are 1 byte long.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+static void
+SetOptUnicodeFromAny(objPtr, numChars)
+ Tcl_Obj *objPtr; /* The object to convert to type Unicode. */
+ int numChars;
+{
+ Tcl_ObjType *typePtr;
+ Unicode *unicodePtr;
+
+ unicodePtr = (Unicode *) ckalloc(UNICODE_SIZE(4));
+ unicodePtr->numChars = numChars;
+
+ typePtr = objPtr->typePtr;
+ if ((typePtr != NULL) && (typePtr->freeIntRepProc) != NULL) {
+ (*typePtr->freeIntRepProc)(objPtr);
+ }
+ objPtr->typePtr = &tclUnicodeType;
+ SET_UNICODE(objPtr, unicodePtr);
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * SetUnicodeFromAny --
+ *
+ * Generate the Unicode internal rep from the string rep.
+ *
+ * Results:
+ * The return value is always TCL_OK.
+ *
+ * Side effects:
+ * A Unicode object is stored as the internal rep of objPtr. The Unicode
+ * ojbect is opitmized for the case where each UTF char in a string is only
+ * one byte. In this case, we store the value of numChars, but we don't copy
+ * the bytes to the unicodeObj->chars. Before accessing obj->chars, check if
+ * all chars are 1 byte long.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+static int
+SetUnicodeFromAny(interp, objPtr)
+ Tcl_Interp *interp; /* Not used. */
+ Tcl_Obj *objPtr; /* The object to convert to type Unicode. */
+{
+ Tcl_ObjType *typePtr;
+ int numBytes, numChars;
+ char *src, *srcEnd;
+ Unicode *unicodePtr;
+ unsigned char *dst;
+
+ typePtr = objPtr->typePtr;
+ if (typePtr != &tclUnicodeType) {
+ src = Tcl_GetStringFromObj(objPtr, &numBytes);
+
+ numChars = Tcl_NumUtfChars(src, numBytes);
+ if (numChars == numBytes) {
+ SetOptUnicodeFromAny(objPtr, numChars);
+ } else {
+ unicodePtr = (Unicode *) ckalloc(UNICODE_SIZE(numChars
+ * sizeof(Tcl_UniChar)));
+ srcEnd = src + numBytes;
+
+ for (dst = unicodePtr->chars; src < srcEnd;
+ dst += sizeof(Tcl_UniChar)) {
+ src += Tcl_UtfToUniChar(src, (Tcl_UniChar *) dst);
+ }
+
+ unicodePtr->used = numChars * sizeof(Tcl_UniChar);
+ unicodePtr->numChars = numChars;
+ unicodePtr->allocated = numChars * sizeof(Tcl_UniChar);
+
+ if ((typePtr != NULL) && (typePtr->freeIntRepProc) != NULL) {
+ (*typePtr->freeIntRepProc)(objPtr);
+ }
+ objPtr->typePtr = &tclUnicodeType;
+ SET_UNICODE(objPtr, unicodePtr);
+ }
+ }
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * FreeUnicodeInternalRep --
+ *
+ * Deallocate the storage associated with a Unicode data object's
+ * internal representation.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Frees memory.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+FreeUnicodeInternalRep(objPtr)
+ Tcl_Obj *objPtr; /* Object with internal rep to free. */
+{
+ ckfree((char *) GET_UNICODE(objPtr));
+}
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