+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
-* Copyright (C) 2005-2012, International Business Machines
+* Copyright (C) 2005-2016, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: utext.cpp
-* encoding: US-ASCII
+* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
U_CAPI UText * U_EXPORT2
utext_clone(UText *dest, const UText *src, UBool deep, UBool readOnly, UErrorCode *status) {
- UText *result;
- result = src->pFuncs->clone(dest, src, deep, status);
+ if (U_FAILURE(*status)) {
+ return dest;
+ }
+ UText *result = src->pFuncs->clone(dest, src, deep, status);
+ if (U_FAILURE(*status)) {
+ return result;
+ }
+ if (result == NULL) {
+ *status = U_MEMORY_ALLOCATION_ERROR;
+ return result;
+ }
if (readOnly) {
utext_freeze(result);
}
adjustPointer(dest, &dest->r, src);
adjustPointer(dest, (const void **)&dest->chunkContents, src);
+ // The newly shallow-cloned UText does _not_ own the underlying storage for the text.
+ // (The source for the clone may or may not have owned the text.)
+
+ dest->providerProperties &= ~I32_FLAG(UTEXT_PROVIDER_OWNS_TEXT);
+
return dest;
}
//------------------------------------------------------------------------------
// Chunk size.
-// Must be less than 85, because of byte mapping from UChar indexes to native indexes.
+// Must be less than 85 (256/3), because of byte mapping from UChar indexes to native indexes.
// Worst case is three native bytes to one UChar. (Supplemenaries are 4 native bytes
// to two UChars.)
+// The longest illegal byte sequence treated as a single error (and converted to U+FFFD)
+// is a three-byte sequence (truncated four-byte sequence).
//
enum { UTF8_TEXT_CHUNK_SIZE=32 };
// Requested index is in this buffer.
u8b = (UTF8Buf *)ut->p; // the current buffer
mapIndex = ix - u8b->toUCharsMapStart;
+ U_ASSERT(mapIndex < (int32_t)sizeof(UTF8Buf::mapToUChars));
ut->chunkOffset = u8b->mapToUChars[mapIndex] - u8b->bufStartIdx;
return TRUE;
int32_t cIx = srcIx;
int32_t dIx = destIx;
int32_t dIxSaved = destIx;
- U8_NEXT(s8, srcIx, strLen, c);
+ U8_NEXT_OR_FFFD(s8, srcIx, strLen, c);
if (c==0 && nulTerminated) {
srcIx--;
break;
}
- if (c<0) {
- // Illegal UTF-8. Replace with sub character.
- c = 0x0fffd;
- }
U16_APPEND_UNSAFE(buf, destIx, c);
do {
// Can only do this if the incoming index is somewhere in the interior of the string.
// If index is at the end, there is no character there to look at.
if (ix != ut->b) {
+ // Note: this function will only move the index back if it is on a trail byte
+ // and there is a preceding lead byte and the sequence from the lead
+ // through this trail could be part of a valid UTF-8 sequence
+ // Otherwise the index remains unchanged.
U8_SET_CP_START(s8, 0, ix);
}
UChar *buf = u8b->buf;
uint8_t *mapToNative = u8b->mapToNative;
uint8_t *mapToUChars = u8b->mapToUChars;
- int32_t toUCharsMapStart = ix - (UTF8_TEXT_CHUNK_SIZE*3 + 1);
+ int32_t toUCharsMapStart = ix - sizeof(UTF8Buf::mapToUChars) + 1;
+ // Note that toUCharsMapStart can be negative. Happens when the remaining
+ // text from current position to the beginning is less than the buffer size.
+ // + 1 because mapToUChars must have a slot at the end for the bufNativeLimit entry.
int32_t destIx = UTF8_TEXT_CHUNK_SIZE+2; // Start in the overflow region
// at end of buffer to leave room
// for a surrogate pair at the
if (c<0x80) {
// Special case ASCII range for speed.
buf[destIx] = (UChar)c;
+ U_ASSERT(toUCharsMapStart <= srcIx);
mapToUChars[srcIx - toUCharsMapStart] = (uint8_t)destIx;
mapToNative[destIx] = (uint8_t)(srcIx - toUCharsMapStart);
} else {
int32_t sIx = srcIx; // ix of last byte of multi-byte u8 char
// Get the full character from the UTF8 string.
- // use code derived from tbe macros in utf.8
+ // use code derived from tbe macros in utf8.h
// Leaves srcIx pointing at the first byte of the UTF-8 char.
//
- if (c<=0xbf) {
- c=utf8_prevCharSafeBody(s8, 0, &srcIx, c, -1);
- // leaves srcIx at first byte of the multi-byte char.
- } else {
- c=0x0fffd;
- }
+ c=utf8_prevCharSafeBody(s8, 0, &srcIx, c, -3);
+ // leaves srcIx at first byte of the multi-byte char.
// Store the character in UTF-16 buffer.
if (c<0x10000) {
do {
mapToUChars[sIx-- - toUCharsMapStart] = (uint8_t)destIx;
} while (sIx >= srcIx);
+ U_ASSERT(toUCharsMapStart <= (srcIx+1));
// Set native indexing limit to be the current position.
// We are processing a non-ascii, non-native-indexing char now;
if(ch <=0x7f){
*pDest++=(UChar)ch;
}else{
- ch=utf8_nextCharSafeBody(pSrc, &index, srcLength, ch, -1);
- if(ch<0){
- ch = 0xfffd;
- }
+ ch=utf8_nextCharSafeBody(pSrc, &index, srcLength, ch, -3);
if(U_IS_BMP(ch)){
*(pDest++)=(UChar)ch;
}else{
if(ch <= 0x7f){
reqLength++;
}else{
- ch=utf8_nextCharSafeBody(pSrc, &index, srcLength, ch, -1);
- if(ch<0){
- ch = 0xfffd;
- }
+ ch=utf8_nextCharSafeBody(pSrc, &index, srcLength, ch, -3);
reqLength+=U16_LENGTH(ch);
}
}
U_ASSERT(index>=ut->chunkNativeStart+ut->nativeIndexingLimit);
U_ASSERT(index<=ut->chunkNativeLimit);
int32_t mapIndex = index - u8b->toUCharsMapStart;
+ U_ASSERT(mapIndex < (int32_t)sizeof(UTF8Buf::mapToUChars));
int32_t offset = u8b->mapToUChars[mapIndex] - u8b->bufStartIdx;
U_ASSERT(offset>=0 && offset<=ut->chunkLength);
return offset;
U_CDECL_END
-static const struct UTextFuncs utf8Funcs =
+static const struct UTextFuncs utf8Funcs =
{
sizeof(UTextFuncs),
0, 0, 0, // Reserved alignment padding
UnicodeString buffer(dest, 0, destCapacity); // writable alias
rep->extractBetween(start32, limit32, buffer);
repTextAccess(ut, limit32, TRUE);
-
+
return u_terminateUChars(dest, destCapacity, length, status);
}
repTextAccess(ut, nativeIterIndex, TRUE);
}
-static const struct UTextFuncs repFuncs =
+static const struct UTextFuncs repFuncs =
{
sizeof(UTextFuncs),
0, 0, 0, // Reserved alignment padding
repTextLength,
repTextAccess,
repTextExtract,
- repTextReplace,
- repTextCopy,
+ repTextReplace,
+ repTextCopy,
NULL, // MapOffsetToNative,
NULL, // MapIndexToUTF16,
repTextClose,
return NULL;
}
ut = utext_setup(ut, sizeof(ReplExtra), status);
+ if(U_FAILURE(*status)) {
+ return ut;
+ }
ut->providerProperties = I32_FLAG(UTEXT_PROVIDER_WRITABLE);
if(rep->hasMetaData()) {
}
if(move) {
- // move: copy to destIndex, then replace original with nothing
+ // move: copy to destIndex, then remove original
int32_t segLength=limit32-start32;
us->copy(start32, limit32, destIndex32);
if(destIndex32<start32) {
start32+=segLength;
}
- us->replace(start32, segLength, NULL, 0);
+ us->remove(start32, segLength);
} else {
// copy
us->copy(start32, limit32, destIndex32);
}
-static const struct UTextFuncs unistrFuncs =
+static const struct UTextFuncs unistrFuncs =
{
sizeof(UTextFuncs),
0, 0, 0, // Reserved alignment padding
unistrTextLength,
unistrTextAccess,
unistrTextExtract,
- unistrTextReplace,
- unistrTextCopy,
+ unistrTextReplace,
+ unistrTextCopy,
NULL, // MapOffsetToNative,
NULL, // MapIndexToUTF16,
unistrTextClose,
ut->chunkLength = si;
ut->nativeIndexingLimit = si;
strLength = si;
+ limit32 = si;
break;
}
U_ASSERT(di>=0); /* to ensure di never exceeds INT32_MAX, which must not happen logically */
// If the limit index points to a lead surrogate of a pair,
// add the corresponding trail surrogate to the destination.
if (si>0 && U16_IS_LEAD(s[si-1]) &&
- ((si<strLength || strLength<0) && U16_IS_TRAIL(s[si])))
+ ((si<strLength || strLength<0) && U16_IS_TRAIL(s[si])))
{
if (di<destCapacity) {
// store only if there is space in the output buffer.
- dest[di++] = s[si++];
+ dest[di++] = s[si];
}
+ si++;
}
// Put iteration position at the point just following the extracted text
- ut->chunkOffset = uprv_min(strLength, start32 + destCapacity);
+ if (si <= ut->chunkNativeLimit) {
+ ut->chunkOffset = si;
+ } else {
+ ucstrTextAccess(ut, si, TRUE);
+ }
// Add a terminating NUL if space in the buffer permits,
// and set the error status as required.
return di;
}
-static const struct UTextFuncs ucstrFuncs =
+static const struct UTextFuncs ucstrFuncs =
{
sizeof(UTextFuncs),
0, 0, 0, // Reserved alignment padding
CharacterIterator *srcCI =(CharacterIterator *)src->context;
srcCI = srcCI->clone();
dest = utext_openCharacterIterator(dest, srcCI, status);
+ if (U_FAILURE(*status)) {
+ return dest;
+ }
// cast off const on getNativeIndex.
// For CharacterIterator based UTexts, this is safe, the operation is const.
int64_t ix = utext_getNativeIndex((UText *)src);
}
srci += len;
}
-
+
charIterTextAccess(ut, copyLimit, TRUE);
u_terminateUChars(dest, destCapacity, desti, status);
return desti;
}
-static const struct UTextFuncs charIterFuncs =
+static const struct UTextFuncs charIterFuncs =
{
sizeof(UTextFuncs),
0, 0, 0, // Reserved alignment padding
}
return ut;
}
-
-
-
projects / apple / icu.git / blobdiff