+++ /dev/null
-/*
-******************************************************************************
-*
-* Copyright (C) 2001-2010, International Business Machines
-* Corporation and others. All Rights Reserved.
-*
-******************************************************************************
-*
-* File ustrtrns.c
-*
-* Modification History:
-*
-* Date Name Description
-* 9/10/2001 Ram Creation.
-******************************************************************************
-*/
-
-/*******************************************************************************
- *
- * u_strTo* and u_strFrom* APIs
- * WCS functions moved to ustr_wcs.c for better modularization
- *
- *******************************************************************************
- */
-
-
-#include "unicode/putil.h"
-#include "unicode/ustring.h"
-#include "cstring.h"
-#include "cmemory.h"
-#include "ustr_imp.h"
-
-U_CAPI UChar* U_EXPORT2
-u_strFromUTF32WithSub(UChar *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const UChar32 *src,
- int32_t srcLength,
- UChar32 subchar, int32_t *pNumSubstitutions,
- UErrorCode *pErrorCode) {
- const UChar32 *srcLimit;
- UChar32 ch;
- UChar *destLimit;
- UChar *pDest;
- int32_t reqLength;
- int32_t numSubstitutions;
-
- /* args check */
- if(U_FAILURE(*pErrorCode)){
- return NULL;
- }
- if( (src==NULL && srcLength!=0) || srcLength < -1 ||
- (destCapacity<0) || (dest == NULL && destCapacity > 0) ||
- subchar > 0x10ffff || U_IS_SURROGATE(subchar)
- ) {
- *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
- return NULL;
- }
-
- if(pNumSubstitutions != NULL) {
- *pNumSubstitutions = 0;
- }
-
- pDest = dest;
- destLimit = dest + destCapacity;
- reqLength = 0;
- numSubstitutions = 0;
-
- if(srcLength < 0) {
- /* simple loop for conversion of a NUL-terminated BMP string */
- while((ch=*src) != 0 &&
- ((uint32_t)ch < 0xd800 || (0xe000 <= ch && ch <= 0xffff))) {
- ++src;
- if(pDest < destLimit) {
- *pDest++ = (UChar)ch;
- } else {
- ++reqLength;
- }
- }
- srcLimit = src;
- if(ch != 0) {
- /* "complicated" case, find the end of the remaining string */
- while(*++srcLimit != 0) {}
- }
- } else {
- srcLimit = src + srcLength;
- }
-
- /* convert with length */
- while(src < srcLimit) {
- ch = *src++;
- do {
- /* usually "loops" once; twice only for writing subchar */
- if((uint32_t)ch < 0xd800 || (0xe000 <= ch && ch <= 0xffff)) {
- if(pDest < destLimit) {
- *pDest++ = (UChar)ch;
- } else {
- ++reqLength;
- }
- break;
- } else if(0x10000 <= ch && ch <= 0x10ffff) {
- if((pDest + 2) <= destLimit) {
- *pDest++ = U16_LEAD(ch);
- *pDest++ = U16_TRAIL(ch);
- } else {
- reqLength += 2;
- }
- break;
- } else if((ch = subchar) < 0) {
- /* surrogate code point, or not a Unicode code point at all */
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- } else {
- ++numSubstitutions;
- }
- } while(TRUE);
- }
-
- reqLength += (int32_t)(pDest - dest);
- if(pDestLength) {
- *pDestLength = reqLength;
- }
- if(pNumSubstitutions != NULL) {
- *pNumSubstitutions = numSubstitutions;
- }
-
- /* Terminate the buffer */
- u_terminateUChars(dest, destCapacity, reqLength, pErrorCode);
-
- return dest;
-}
-
-U_CAPI UChar* U_EXPORT2
-u_strFromUTF32(UChar *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const UChar32 *src,
- int32_t srcLength,
- UErrorCode *pErrorCode) {
- return u_strFromUTF32WithSub(
- dest, destCapacity, pDestLength,
- src, srcLength,
- U_SENTINEL, NULL,
- pErrorCode);
-}
-
-U_CAPI UChar32* U_EXPORT2
-u_strToUTF32WithSub(UChar32 *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const UChar *src,
- int32_t srcLength,
- UChar32 subchar, int32_t *pNumSubstitutions,
- UErrorCode *pErrorCode) {
- const UChar *srcLimit;
- UChar32 ch;
- UChar ch2;
- UChar32 *destLimit;
- UChar32 *pDest;
- int32_t reqLength;
- int32_t numSubstitutions;
-
- /* args check */
- if(U_FAILURE(*pErrorCode)){
- return NULL;
- }
- if( (src==NULL && srcLength!=0) || srcLength < -1 ||
- (destCapacity<0) || (dest == NULL && destCapacity > 0) ||
- subchar > 0x10ffff || U_IS_SURROGATE(subchar)
- ) {
- *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
- return NULL;
- }
-
- if(pNumSubstitutions != NULL) {
- *pNumSubstitutions = 0;
- }
-
- pDest = dest;
- destLimit = dest + destCapacity;
- reqLength = 0;
- numSubstitutions = 0;
-
- if(srcLength < 0) {
- /* simple loop for conversion of a NUL-terminated BMP string */
- while((ch=*src) != 0 && !U16_IS_SURROGATE(ch)) {
- ++src;
- if(pDest < destLimit) {
- *pDest++ = ch;
- } else {
- ++reqLength;
- }
- }
- srcLimit = src;
- if(ch != 0) {
- /* "complicated" case, find the end of the remaining string */
- while(*++srcLimit != 0) {}
- }
- } else {
- srcLimit = src + srcLength;
- }
-
- /* convert with length */
- while(src < srcLimit) {
- ch = *src++;
- if(!U16_IS_SURROGATE(ch)) {
- /* write or count ch below */
- } else if(U16_IS_SURROGATE_LEAD(ch) && src < srcLimit && U16_IS_TRAIL(ch2 = *src)) {
- ++src;
- ch = U16_GET_SUPPLEMENTARY(ch, ch2);
- } else if((ch = subchar) < 0) {
- /* unpaired surrogate */
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- } else {
- ++numSubstitutions;
- }
- if(pDest < destLimit) {
- *pDest++ = ch;
- } else {
- ++reqLength;
- }
- }
-
- reqLength += (int32_t)(pDest - dest);
- if(pDestLength) {
- *pDestLength = reqLength;
- }
- if(pNumSubstitutions != NULL) {
- *pNumSubstitutions = numSubstitutions;
- }
-
- /* Terminate the buffer */
- u_terminateUChar32s(dest, destCapacity, reqLength, pErrorCode);
-
- return dest;
-}
-
-U_CAPI UChar32* U_EXPORT2
-u_strToUTF32(UChar32 *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const UChar *src,
- int32_t srcLength,
- UErrorCode *pErrorCode) {
- return u_strToUTF32WithSub(
- dest, destCapacity, pDestLength,
- src, srcLength,
- U_SENTINEL, NULL,
- pErrorCode);
-}
-
-/* for utf8_nextCharSafeBodyTerminated() */
-static const UChar32
-utf8_minLegal[4]={ 0, 0x80, 0x800, 0x10000 };
-
-/*
- * Version of utf8_nextCharSafeBody() with the following differences:
- * - checks for NUL termination instead of length
- * - works with pointers instead of indexes
- * - always strict (strict==-1)
- *
- * *ps points to after the lead byte and will be moved to after the last trail byte.
- * c is the lead byte.
- * @return the code point, or U_SENTINEL
- */
-static UChar32
-utf8_nextCharSafeBodyTerminated(const uint8_t **ps, UChar32 c) {
- const uint8_t *s=*ps;
- uint8_t trail, illegal=0;
- uint8_t count=UTF8_COUNT_TRAIL_BYTES(c);
- UTF8_MASK_LEAD_BYTE((c), count);
- /* count==0 for illegally leading trail bytes and the illegal bytes 0xfe and 0xff */
- switch(count) {
- /* each branch falls through to the next one */
- case 5:
- case 4:
- /* count>=4 is always illegal: no more than 3 trail bytes in Unicode's UTF-8 */
- illegal=1;
- break;
- case 3:
- trail=(uint8_t)(*s++ - 0x80);
- c=(c<<6)|trail;
- if(trail>0x3f || c>=0x110) {
- /* not a trail byte, or code point>0x10ffff (outside Unicode) */
- illegal=1;
- break;
- }
- case 2:
- trail=(uint8_t)(*s++ - 0x80);
- if(trail>0x3f) {
- /* not a trail byte */
- illegal=1;
- break;
- }
- c=(c<<6)|trail;
- case 1:
- trail=(uint8_t)(*s++ - 0x80);
- if(trail>0x3f) {
- /* not a trail byte */
- illegal=1;
- }
- c=(c<<6)|trail;
- break;
- case 0:
- return U_SENTINEL;
- /* no default branch to optimize switch() - all values are covered */
- }
-
- /* correct sequence - all trail bytes have (b7..b6)==(10)? */
- /* illegal is also set if count>=4 */
- if(illegal || c<utf8_minLegal[count] || UTF_IS_SURROGATE(c)) {
- /* error handling */
- /* don't go beyond this sequence */
- s=*ps;
- while(count>0 && UTF8_IS_TRAIL(*s)) {
- ++s;
- --count;
- }
- c=U_SENTINEL;
- }
- *ps=s;
- return c;
-}
-
-/*
- * Version of utf8_nextCharSafeBody() with the following differences:
- * - works with pointers instead of indexes
- * - always strict (strict==-1)
- *
- * *ps points to after the lead byte and will be moved to after the last trail byte.
- * c is the lead byte.
- * @return the code point, or U_SENTINEL
- */
-static UChar32
-utf8_nextCharSafeBodyPointer(const uint8_t **ps, const uint8_t *limit, UChar32 c) {
- const uint8_t *s=*ps;
- uint8_t trail, illegal=0;
- uint8_t count=UTF8_COUNT_TRAIL_BYTES(c);
- if((limit-s)>=count) {
- UTF8_MASK_LEAD_BYTE((c), count);
- /* count==0 for illegally leading trail bytes and the illegal bytes 0xfe and 0xff */
- switch(count) {
- /* each branch falls through to the next one */
- case 5:
- case 4:
- /* count>=4 is always illegal: no more than 3 trail bytes in Unicode's UTF-8 */
- illegal=1;
- break;
- case 3:
- trail=*s++;
- c=(c<<6)|(trail&0x3f);
- if(c<0x110) {
- illegal|=(trail&0xc0)^0x80;
- } else {
- /* code point>0x10ffff, outside Unicode */
- illegal=1;
- break;
- }
- case 2:
- trail=*s++;
- c=(c<<6)|(trail&0x3f);
- illegal|=(trail&0xc0)^0x80;
- case 1:
- trail=*s++;
- c=(c<<6)|(trail&0x3f);
- illegal|=(trail&0xc0)^0x80;
- break;
- case 0:
- return U_SENTINEL;
- /* no default branch to optimize switch() - all values are covered */
- }
- } else {
- illegal=1; /* too few bytes left */
- }
-
- /* correct sequence - all trail bytes have (b7..b6)==(10)? */
- /* illegal is also set if count>=4 */
- if(illegal || c<utf8_minLegal[count] || UTF_IS_SURROGATE(c)) {
- /* error handling */
- /* don't go beyond this sequence */
- s=*ps;
- while(count>0 && s<limit && UTF8_IS_TRAIL(*s)) {
- ++s;
- --count;
- }
- c=U_SENTINEL;
- }
- *ps=s;
- return c;
-}
-
-U_CAPI UChar* U_EXPORT2
-u_strFromUTF8WithSub(UChar *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const char* src,
- int32_t srcLength,
- UChar32 subchar, int32_t *pNumSubstitutions,
- UErrorCode *pErrorCode){
- UChar *pDest = dest;
- UChar *pDestLimit = dest+destCapacity;
- UChar32 ch;
- int32_t reqLength = 0;
- const uint8_t* pSrc = (const uint8_t*) src;
- uint8_t t1, t2; /* trail bytes */
- int32_t numSubstitutions;
-
- /* args check */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
- return NULL;
- }
-
- if( (src==NULL && srcLength!=0) || srcLength < -1 ||
- (destCapacity<0) || (dest == NULL && destCapacity > 0) ||
- subchar > 0x10ffff || U_IS_SURROGATE(subchar)
- ) {
- *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
- return NULL;
- }
-
- if(pNumSubstitutions!=NULL) {
- *pNumSubstitutions=0;
- }
- numSubstitutions=0;
-
- /*
- * Inline processing of UTF-8 byte sequences:
- *
- * Byte sequences for the most common characters are handled inline in
- * the conversion loops. In order to reduce the path lengths for those
- * characters, the tests are arranged in a kind of binary search.
- * ASCII (<=0x7f) is checked first, followed by the dividing point
- * between 2- and 3-byte sequences (0xe0).
- * The 3-byte branch is tested first to speed up CJK text.
- * The compiler should combine the subtractions for the two tests for 0xe0.
- * Each branch then tests for the other end of its range.
- */
-
- if(srcLength < 0){
- /*
- * Transform a NUL-terminated string.
- * The code explicitly checks for NULs only in the lead byte position.
- * A NUL byte in the trail byte position fails the trail byte range check anyway.
- */
- while(((ch = *pSrc) != 0) && (pDest < pDestLimit)) {
- if(ch <= 0x7f){
- *pDest++=(UChar)ch;
- ++pSrc;
- } else {
- if(ch > 0xe0) {
- if( /* handle U+1000..U+CFFF inline */
- ch <= 0xec &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f &&
- (t2 = (uint8_t)(pSrc[2] - 0x80)) <= 0x3f
- ) {
- /* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
- *pDest++ = (UChar)((ch << 12) | (t1 << 6) | t2);
- pSrc += 3;
- continue;
- }
- } else if(ch < 0xe0) {
- if( /* handle U+0080..U+07FF inline */
- ch >= 0xc2 &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f
- ) {
- *pDest++ = (UChar)(((ch & 0x1f) << 6) | t1);
- pSrc += 2;
- continue;
- }
- }
-
- /* function call for "complicated" and error cases */
- ++pSrc; /* continue after the lead byte */
- ch=utf8_nextCharSafeBodyTerminated(&pSrc, ch);
- if(ch<0 && (++numSubstitutions, ch = subchar) < 0) {
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- } else if(ch<=0xFFFF) {
- *(pDest++)=(UChar)ch;
- } else {
- *(pDest++)=UTF16_LEAD(ch);
- if(pDest<pDestLimit) {
- *(pDest++)=UTF16_TRAIL(ch);
- } else {
- reqLength++;
- break;
- }
- }
- }
- }
-
- /* Pre-flight the rest of the string. */
- while((ch = *pSrc) != 0) {
- if(ch <= 0x7f){
- ++reqLength;
- ++pSrc;
- } else {
- if(ch > 0xe0) {
- if( /* handle U+1000..U+CFFF inline */
- ch <= 0xec &&
- (uint8_t)(pSrc[1] - 0x80) <= 0x3f &&
- (uint8_t)(pSrc[2] - 0x80) <= 0x3f
- ) {
- ++reqLength;
- pSrc += 3;
- continue;
- }
- } else if(ch < 0xe0) {
- if( /* handle U+0080..U+07FF inline */
- ch >= 0xc2 &&
- (uint8_t)(pSrc[1] - 0x80) <= 0x3f
- ) {
- ++reqLength;
- pSrc += 2;
- continue;
- }
- }
-
- /* function call for "complicated" and error cases */
- ++pSrc; /* continue after the lead byte */
- ch=utf8_nextCharSafeBodyTerminated(&pSrc, ch);
- if(ch<0 && (++numSubstitutions, ch = subchar) < 0) {
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }
- reqLength += U16_LENGTH(ch);
- }
- }
- } else /* srcLength >= 0 */ {
- const uint8_t *pSrcLimit = pSrc + srcLength;
- int32_t count;
-
- /* Faster loop without ongoing checking for pSrcLimit and pDestLimit. */
- for(;;) {
- /*
- * Each iteration of the inner loop progresses by at most 3 UTF-8
- * bytes and one UChar, for most characters.
- * For supplementary code points (4 & 2), which are rare,
- * there is an additional adjustment.
- */
- count = (int32_t)(pDestLimit - pDest);
- srcLength = (int32_t)((pSrcLimit - pSrc) / 3);
- if(count > srcLength) {
- count = srcLength; /* min(remaining dest, remaining src/3) */
- }
- if(count < 3) {
- /*
- * Too much overhead if we get near the end of the string,
- * continue with the next loop.
- */
- break;
- }
-
- do {
- ch = *pSrc;
- if(ch <= 0x7f){
- *pDest++=(UChar)ch;
- ++pSrc;
- } else {
- if(ch > 0xe0) {
- if( /* handle U+1000..U+CFFF inline */
- ch <= 0xec &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f &&
- (t2 = (uint8_t)(pSrc[2] - 0x80)) <= 0x3f
- ) {
- /* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
- *pDest++ = (UChar)((ch << 12) | (t1 << 6) | t2);
- pSrc += 3;
- continue;
- }
- } else if(ch < 0xe0) {
- if( /* handle U+0080..U+07FF inline */
- ch >= 0xc2 &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f
- ) {
- *pDest++ = (UChar)(((ch & 0x1f) << 6) | t1);
- pSrc += 2;
- continue;
- }
- }
-
- if(ch >= 0xf0 || subchar > 0xffff) {
- /*
- * We may read up to six bytes and write up to two UChars,
- * which we didn't account for with computing count,
- * so we adjust it here.
- */
- if(--count == 0) {
- break;
- }
- }
-
- /* function call for "complicated" and error cases */
- ++pSrc; /* continue after the lead byte */
- ch=utf8_nextCharSafeBodyPointer(&pSrc, pSrcLimit, ch);
- if(ch<0 && (++numSubstitutions, ch = subchar) < 0){
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }else if(ch<=0xFFFF){
- *(pDest++)=(UChar)ch;
- }else{
- *(pDest++)=UTF16_LEAD(ch);
- *(pDest++)=UTF16_TRAIL(ch);
- }
- }
- } while(--count > 0);
- }
-
- while((pSrc<pSrcLimit) && (pDest<pDestLimit)) {
- ch = *pSrc;
- if(ch <= 0x7f){
- *pDest++=(UChar)ch;
- ++pSrc;
- } else {
- if(ch > 0xe0) {
- if( /* handle U+1000..U+CFFF inline */
- ch <= 0xec &&
- ((pSrcLimit - pSrc) >= 3) &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f &&
- (t2 = (uint8_t)(pSrc[2] - 0x80)) <= 0x3f
- ) {
- /* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
- *pDest++ = (UChar)((ch << 12) | (t1 << 6) | t2);
- pSrc += 3;
- continue;
- }
- } else if(ch < 0xe0) {
- if( /* handle U+0080..U+07FF inline */
- ch >= 0xc2 &&
- ((pSrcLimit - pSrc) >= 2) &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f
- ) {
- *pDest++ = (UChar)(((ch & 0x1f) << 6) | t1);
- pSrc += 2;
- continue;
- }
- }
-
- /* function call for "complicated" and error cases */
- ++pSrc; /* continue after the lead byte */
- ch=utf8_nextCharSafeBodyPointer(&pSrc, pSrcLimit, ch);
- if(ch<0 && (++numSubstitutions, ch = subchar) < 0){
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }else if(ch<=0xFFFF){
- *(pDest++)=(UChar)ch;
- }else{
- *(pDest++)=UTF16_LEAD(ch);
- if(pDest<pDestLimit){
- *(pDest++)=UTF16_TRAIL(ch);
- }else{
- reqLength++;
- break;
- }
- }
- }
- }
- /* do not fill the dest buffer just count the UChars needed */
- while(pSrc < pSrcLimit){
- ch = *pSrc;
- if(ch <= 0x7f){
- reqLength++;
- ++pSrc;
- } else {
- if(ch > 0xe0) {
- if( /* handle U+1000..U+CFFF inline */
- ch <= 0xec &&
- ((pSrcLimit - pSrc) >= 3) &&
- (uint8_t)(pSrc[1] - 0x80) <= 0x3f &&
- (uint8_t)(pSrc[2] - 0x80) <= 0x3f
- ) {
- reqLength++;
- pSrc += 3;
- continue;
- }
- } else if(ch < 0xe0) {
- if( /* handle U+0080..U+07FF inline */
- ch >= 0xc2 &&
- ((pSrcLimit - pSrc) >= 2) &&
- (uint8_t)(pSrc[1] - 0x80) <= 0x3f
- ) {
- reqLength++;
- pSrc += 2;
- continue;
- }
- }
-
- /* function call for "complicated" and error cases */
- ++pSrc; /* continue after the lead byte */
- ch=utf8_nextCharSafeBodyPointer(&pSrc, pSrcLimit, ch);
- if(ch<0 && (++numSubstitutions, ch = subchar) < 0){
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }
- reqLength+=UTF_CHAR_LENGTH(ch);
- }
- }
- }
-
- reqLength+=(int32_t)(pDest - dest);
-
- if(pNumSubstitutions!=NULL) {
- *pNumSubstitutions=numSubstitutions;
- }
-
- if(pDestLength){
- *pDestLength = reqLength;
- }
-
- /* Terminate the buffer */
- u_terminateUChars(dest,destCapacity,reqLength,pErrorCode);
-
- return dest;
-}
-
-U_CAPI UChar* U_EXPORT2
-u_strFromUTF8(UChar *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const char* src,
- int32_t srcLength,
- UErrorCode *pErrorCode){
- return u_strFromUTF8WithSub(
- dest, destCapacity, pDestLength,
- src, srcLength,
- U_SENTINEL, NULL,
- pErrorCode);
-}
-
-U_CAPI UChar * U_EXPORT2
-u_strFromUTF8Lenient(UChar *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const char *src,
- int32_t srcLength,
- UErrorCode *pErrorCode) {
- UChar *pDest = dest;
- UChar32 ch;
- int32_t reqLength = 0;
- uint8_t* pSrc = (uint8_t*) src;
-
- /* args check */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
- return NULL;
- }
-
- if( (src==NULL && srcLength!=0) || srcLength < -1 ||
- (destCapacity<0) || (dest == NULL && destCapacity > 0)
- ) {
- *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
- return NULL;
- }
-
- if(srcLength < 0) {
- /* Transform a NUL-terminated string. */
- UChar *pDestLimit = dest+destCapacity;
- uint8_t t1, t2, t3; /* trail bytes */
-
- while(((ch = *pSrc) != 0) && (pDest < pDestLimit)) {
- if(ch < 0xc0) {
- /*
- * ASCII, or a trail byte in lead position which is treated like
- * a single-byte sequence for better character boundary
- * resynchronization after illegal sequences.
- */
- *pDest++=(UChar)ch;
- ++pSrc;
- continue;
- } else if(ch < 0xe0) { /* U+0080..U+07FF */
- if((t1 = pSrc[1]) != 0) {
- /* 0x3080 = (0xc0 << 6) + 0x80 */
- *pDest++ = (UChar)((ch << 6) + t1 - 0x3080);
- pSrc += 2;
- continue;
- }
- } else if(ch < 0xf0) { /* U+0800..U+FFFF */
- if((t1 = pSrc[1]) != 0 && (t2 = pSrc[2]) != 0) {
- /* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
- /* 0x2080 = (0x80 << 6) + 0x80 */
- *pDest++ = (UChar)((ch << 12) + (t1 << 6) + t2 - 0x2080);
- pSrc += 3;
- continue;
- }
- } else /* f0..f4 */ { /* U+10000..U+10FFFF */
- if((t1 = pSrc[1]) != 0 && (t2 = pSrc[2]) != 0 && (t3 = pSrc[3]) != 0) {
- pSrc += 4;
- /* 0x3c82080 = (0xf0 << 18) + (0x80 << 12) + (0x80 << 6) + 0x80 */
- ch = (ch << 18) + (t1 << 12) + (t2 << 6) + t3 - 0x3c82080;
- *(pDest++) = U16_LEAD(ch);
- if(pDest < pDestLimit) {
- *(pDest++) = U16_TRAIL(ch);
- } else {
- reqLength = 1;
- break;
- }
- continue;
- }
- }
-
- /* truncated character at the end */
- *pDest++ = 0xfffd;
- while(*++pSrc != 0) {}
- break;
- }
-
- /* Pre-flight the rest of the string. */
- while((ch = *pSrc) != 0) {
- if(ch < 0xc0) {
- /*
- * ASCII, or a trail byte in lead position which is treated like
- * a single-byte sequence for better character boundary
- * resynchronization after illegal sequences.
- */
- ++reqLength;
- ++pSrc;
- continue;
- } else if(ch < 0xe0) { /* U+0080..U+07FF */
- if(pSrc[1] != 0) {
- ++reqLength;
- pSrc += 2;
- continue;
- }
- } else if(ch < 0xf0) { /* U+0800..U+FFFF */
- if(pSrc[1] != 0 && pSrc[2] != 0) {
- ++reqLength;
- pSrc += 3;
- continue;
- }
- } else /* f0..f4 */ { /* U+10000..U+10FFFF */
- if(pSrc[1] != 0 && pSrc[2] != 0 && pSrc[3] != 0) {
- reqLength += 2;
- pSrc += 4;
- continue;
- }
- }
-
- /* truncated character at the end */
- ++reqLength;
- break;
- }
- } else /* srcLength >= 0 */ {
- const uint8_t *pSrcLimit = pSrc + srcLength;
-
- /*
- * This function requires that if srcLength is given, then it must be
- * destCapatity >= srcLength so that we need not check for
- * destination buffer overflow in the loop.
- */
- if(destCapacity < srcLength) {
- if(pDestLength != NULL) {
- *pDestLength = srcLength; /* this likely overestimates the true destLength! */
- }
- *pErrorCode = U_BUFFER_OVERFLOW_ERROR;
- return NULL;
- }
-
- if((pSrcLimit - pSrc) >= 4) {
- pSrcLimit -= 3; /* temporarily reduce pSrcLimit */
-
- /* in this loop, we can always access at least 4 bytes, up to pSrc+3 */
- do {
- ch = *pSrc++;
- if(ch < 0xc0) {
- /*
- * ASCII, or a trail byte in lead position which is treated like
- * a single-byte sequence for better character boundary
- * resynchronization after illegal sequences.
- */
- *pDest++=(UChar)ch;
- } else if(ch < 0xe0) { /* U+0080..U+07FF */
- /* 0x3080 = (0xc0 << 6) + 0x80 */
- *pDest++ = (UChar)((ch << 6) + *pSrc++ - 0x3080);
- } else if(ch < 0xf0) { /* U+0800..U+FFFF */
- /* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
- /* 0x2080 = (0x80 << 6) + 0x80 */
- ch = (ch << 12) + (*pSrc++ << 6);
- *pDest++ = (UChar)(ch + *pSrc++ - 0x2080);
- } else /* f0..f4 */ { /* U+10000..U+10FFFF */
- /* 0x3c82080 = (0xf0 << 18) + (0x80 << 12) + (0x80 << 6) + 0x80 */
- ch = (ch << 18) + (*pSrc++ << 12);
- ch += *pSrc++ << 6;
- ch += *pSrc++ - 0x3c82080;
- *(pDest++) = U16_LEAD(ch);
- *(pDest++) = U16_TRAIL(ch);
- }
- } while(pSrc < pSrcLimit);
-
- pSrcLimit += 3; /* restore original pSrcLimit */
- }
-
- while(pSrc < pSrcLimit) {
- ch = *pSrc++;
- if(ch < 0xc0) {
- /*
- * ASCII, or a trail byte in lead position which is treated like
- * a single-byte sequence for better character boundary
- * resynchronization after illegal sequences.
- */
- *pDest++=(UChar)ch;
- continue;
- } else if(ch < 0xe0) { /* U+0080..U+07FF */
- if(pSrc < pSrcLimit) {
- /* 0x3080 = (0xc0 << 6) + 0x80 */
- *pDest++ = (UChar)((ch << 6) + *pSrc++ - 0x3080);
- continue;
- }
- } else if(ch < 0xf0) { /* U+0800..U+FFFF */
- if((pSrcLimit - pSrc) >= 2) {
- /* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
- /* 0x2080 = (0x80 << 6) + 0x80 */
- ch = (ch << 12) + (*pSrc++ << 6);
- *pDest++ = (UChar)(ch + *pSrc++ - 0x2080);
- pSrc += 3;
- continue;
- }
- } else /* f0..f4 */ { /* U+10000..U+10FFFF */
- if((pSrcLimit - pSrc) >= 3) {
- /* 0x3c82080 = (0xf0 << 18) + (0x80 << 12) + (0x80 << 6) + 0x80 */
- ch = (ch << 18) + (*pSrc++ << 12);
- ch += *pSrc++ << 6;
- ch += *pSrc++ - 0x3c82080;
- *(pDest++) = U16_LEAD(ch);
- *(pDest++) = U16_TRAIL(ch);
- pSrc += 4;
- continue;
- }
- }
-
- /* truncated character at the end */
- *pDest++ = 0xfffd;
- break;
- }
- }
-
- reqLength+=(int32_t)(pDest - dest);
-
- if(pDestLength){
- *pDestLength = reqLength;
- }
-
- /* Terminate the buffer */
- u_terminateUChars(dest,destCapacity,reqLength,pErrorCode);
-
- return dest;
-}
-
-static U_INLINE uint8_t *
-_appendUTF8(uint8_t *pDest, UChar32 c) {
- /* it is 0<=c<=0x10ffff and not a surrogate if called by a validating function */
- if((c)<=0x7f) {
- *pDest++=(uint8_t)c;
- } else if(c<=0x7ff) {
- *pDest++=(uint8_t)((c>>6)|0xc0);
- *pDest++=(uint8_t)((c&0x3f)|0x80);
- } else if(c<=0xffff) {
- *pDest++=(uint8_t)((c>>12)|0xe0);
- *pDest++=(uint8_t)(((c>>6)&0x3f)|0x80);
- *pDest++=(uint8_t)(((c)&0x3f)|0x80);
- } else /* if((uint32_t)(c)<=0x10ffff) */ {
- *pDest++=(uint8_t)(((c)>>18)|0xf0);
- *pDest++=(uint8_t)((((c)>>12)&0x3f)|0x80);
- *pDest++=(uint8_t)((((c)>>6)&0x3f)|0x80);
- *pDest++=(uint8_t)(((c)&0x3f)|0x80);
- }
- return pDest;
-}
-
-
-U_CAPI char* U_EXPORT2
-u_strToUTF8WithSub(char *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const UChar *pSrc,
- int32_t srcLength,
- UChar32 subchar, int32_t *pNumSubstitutions,
- UErrorCode *pErrorCode){
- int32_t reqLength=0;
- uint32_t ch=0,ch2=0;
- uint8_t *pDest = (uint8_t *)dest;
- uint8_t *pDestLimit = pDest + destCapacity;
- int32_t numSubstitutions;
-
- /* args check */
- if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
- return NULL;
- }
-
- if( (pSrc==NULL && srcLength!=0) || srcLength < -1 ||
- (destCapacity<0) || (dest == NULL && destCapacity > 0) ||
- subchar > 0x10ffff || U_IS_SURROGATE(subchar)
- ) {
- *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
- return NULL;
- }
-
- if(pNumSubstitutions!=NULL) {
- *pNumSubstitutions=0;
- }
- numSubstitutions=0;
-
- if(srcLength==-1) {
- while((ch=*pSrc)!=0) {
- ++pSrc;
- if(ch <= 0x7f) {
- if(pDest<pDestLimit) {
- *pDest++ = (uint8_t)ch;
- } else {
- reqLength = 1;
- break;
- }
- } else if(ch <= 0x7ff) {
- if((pDestLimit - pDest) >= 2) {
- *pDest++=(uint8_t)((ch>>6)|0xc0);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else {
- reqLength = 2;
- break;
- }
- } else if(ch <= 0xd7ff || ch >= 0xe000) {
- if((pDestLimit - pDest) >= 3) {
- *pDest++=(uint8_t)((ch>>12)|0xe0);
- *pDest++=(uint8_t)(((ch>>6)&0x3f)|0x80);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else {
- reqLength = 3;
- break;
- }
- } else /* ch is a surrogate */ {
- int32_t length;
-
- /*need not check for NUL because NUL fails UTF_IS_TRAIL() anyway*/
- if(UTF_IS_SURROGATE_FIRST(ch) && UTF_IS_TRAIL(ch2=*pSrc)) {
- ++pSrc;
- ch=UTF16_GET_PAIR_VALUE(ch, ch2);
- } else if(subchar>=0) {
- ch=subchar;
- ++numSubstitutions;
- } else {
- /* Unicode 3.2 forbids surrogate code points in UTF-8 */
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }
-
- length = U8_LENGTH(ch);
- if((pDestLimit - pDest) >= length) {
- /* convert and append*/
- pDest=_appendUTF8(pDest, ch);
- } else {
- reqLength = length;
- break;
- }
- }
- }
- while((ch=*pSrc++)!=0) {
- if(ch<=0x7f) {
- ++reqLength;
- } else if(ch<=0x7ff) {
- reqLength+=2;
- } else if(!UTF_IS_SURROGATE(ch)) {
- reqLength+=3;
- } else if(UTF_IS_SURROGATE_FIRST(ch) && UTF_IS_TRAIL(ch2=*pSrc)) {
- ++pSrc;
- reqLength+=4;
- } else if(subchar>=0) {
- reqLength+=U8_LENGTH(subchar);
- ++numSubstitutions;
- } else {
- /* Unicode 3.2 forbids surrogate code points in UTF-8 */
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }
- }
- } else {
- const UChar *pSrcLimit = pSrc+srcLength;
- int32_t count;
-
- /* Faster loop without ongoing checking for pSrcLimit and pDestLimit. */
- for(;;) {
- /*
- * Each iteration of the inner loop progresses by at most 3 UTF-8
- * bytes and one UChar, for most characters.
- * For supplementary code points (4 & 2), which are rare,
- * there is an additional adjustment.
- */
- count = (int32_t)((pDestLimit - pDest) / 3);
- srcLength = (int32_t)(pSrcLimit - pSrc);
- if(count > srcLength) {
- count = srcLength; /* min(remaining dest/3, remaining src) */
- }
- if(count < 3) {
- /*
- * Too much overhead if we get near the end of the string,
- * continue with the next loop.
- */
- break;
- }
- do {
- ch=*pSrc++;
- if(ch <= 0x7f) {
- *pDest++ = (uint8_t)ch;
- } else if(ch <= 0x7ff) {
- *pDest++=(uint8_t)((ch>>6)|0xc0);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else if(ch <= 0xd7ff || ch >= 0xe000) {
- *pDest++=(uint8_t)((ch>>12)|0xe0);
- *pDest++=(uint8_t)(((ch>>6)&0x3f)|0x80);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else /* ch is a surrogate */ {
- /*
- * We will read two UChars and probably output four bytes,
- * which we didn't account for with computing count,
- * so we adjust it here.
- */
- if(--count == 0) {
- --pSrc; /* undo ch=*pSrc++ for the lead surrogate */
- break; /* recompute count */
- }
-
- if(UTF_IS_SURROGATE_FIRST(ch) && UTF_IS_TRAIL(ch2=*pSrc)) {
- ++pSrc;
- ch=UTF16_GET_PAIR_VALUE(ch, ch2);
-
- /* writing 4 bytes per 2 UChars is ok */
- *pDest++=(uint8_t)((ch>>18)|0xf0);
- *pDest++=(uint8_t)(((ch>>12)&0x3f)|0x80);
- *pDest++=(uint8_t)(((ch>>6)&0x3f)|0x80);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else {
- /* Unicode 3.2 forbids surrogate code points in UTF-8 */
- if(subchar>=0) {
- ch=subchar;
- ++numSubstitutions;
- } else {
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }
-
- /* convert and append*/
- pDest=_appendUTF8(pDest, ch);
- }
- }
- } while(--count > 0);
- }
-
- while(pSrc<pSrcLimit) {
- ch=*pSrc++;
- if(ch <= 0x7f) {
- if(pDest<pDestLimit) {
- *pDest++ = (uint8_t)ch;
- } else {
- reqLength = 1;
- break;
- }
- } else if(ch <= 0x7ff) {
- if((pDestLimit - pDest) >= 2) {
- *pDest++=(uint8_t)((ch>>6)|0xc0);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else {
- reqLength = 2;
- break;
- }
- } else if(ch <= 0xd7ff || ch >= 0xe000) {
- if((pDestLimit - pDest) >= 3) {
- *pDest++=(uint8_t)((ch>>12)|0xe0);
- *pDest++=(uint8_t)(((ch>>6)&0x3f)|0x80);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else {
- reqLength = 3;
- break;
- }
- } else /* ch is a surrogate */ {
- int32_t length;
-
- if(UTF_IS_SURROGATE_FIRST(ch) && pSrc<pSrcLimit && UTF_IS_TRAIL(ch2=*pSrc)) {
- ++pSrc;
- ch=UTF16_GET_PAIR_VALUE(ch, ch2);
- } else if(subchar>=0) {
- ch=subchar;
- ++numSubstitutions;
- } else {
- /* Unicode 3.2 forbids surrogate code points in UTF-8 */
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }
-
- length = U8_LENGTH(ch);
- if((pDestLimit - pDest) >= length) {
- /* convert and append*/
- pDest=_appendUTF8(pDest, ch);
- } else {
- reqLength = length;
- break;
- }
- }
- }
- while(pSrc<pSrcLimit) {
- ch=*pSrc++;
- if(ch<=0x7f) {
- ++reqLength;
- } else if(ch<=0x7ff) {
- reqLength+=2;
- } else if(!UTF_IS_SURROGATE(ch)) {
- reqLength+=3;
- } else if(UTF_IS_SURROGATE_FIRST(ch) && pSrc<pSrcLimit && UTF_IS_TRAIL(ch2=*pSrc)) {
- ++pSrc;
- reqLength+=4;
- } else if(subchar>=0) {
- reqLength+=U8_LENGTH(subchar);
- ++numSubstitutions;
- } else {
- /* Unicode 3.2 forbids surrogate code points in UTF-8 */
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- }
- }
- }
-
- reqLength+=(int32_t)(pDest - (uint8_t *)dest);
-
- if(pNumSubstitutions!=NULL) {
- *pNumSubstitutions=numSubstitutions;
- }
-
- if(pDestLength){
- *pDestLength = reqLength;
- }
-
- /* Terminate the buffer */
- u_terminateChars(dest, destCapacity, reqLength, pErrorCode);
- return dest;
-}
-
-U_CAPI char* U_EXPORT2
-u_strToUTF8(char *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const UChar *pSrc,
- int32_t srcLength,
- UErrorCode *pErrorCode){
- return u_strToUTF8WithSub(
- dest, destCapacity, pDestLength,
- pSrc, srcLength,
- U_SENTINEL, NULL,
- pErrorCode);
-}
-
-U_CAPI UChar* U_EXPORT2
-u_strFromJavaModifiedUTF8WithSub(
- UChar *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const char *src,
- int32_t srcLength,
- UChar32 subchar, int32_t *pNumSubstitutions,
- UErrorCode *pErrorCode) {
- UChar *pDest = dest;
- UChar *pDestLimit = dest+destCapacity;
- UChar32 ch;
- int32_t reqLength = 0;
- const uint8_t* pSrc = (const uint8_t*) src;
- const uint8_t *pSrcLimit;
- int32_t count;
- uint8_t t1, t2; /* trail bytes */
- int32_t numSubstitutions;
-
- /* args check */
- if(U_FAILURE(*pErrorCode)){
- return NULL;
- }
- if( (src==NULL && srcLength!=0) || srcLength < -1 ||
- (dest==NULL && destCapacity!=0) || destCapacity<0 ||
- subchar > 0x10ffff || U_IS_SURROGATE(subchar)
- ) {
- *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
- return NULL;
- }
-
- if(pNumSubstitutions!=NULL) {
- *pNumSubstitutions=0;
- }
- numSubstitutions=0;
-
- if(srcLength < 0) {
- /*
- * Transform a NUL-terminated ASCII string.
- * Handle non-ASCII strings with slower code.
- */
- while(((ch = *pSrc) != 0) && ch <= 0x7f && (pDest < pDestLimit)) {
- *pDest++=(UChar)ch;
- ++pSrc;
- }
- if(ch == 0) {
- reqLength=(int32_t)(pDest - dest);
- if(pDestLength) {
- *pDestLength = reqLength;
- }
-
- /* Terminate the buffer */
- u_terminateUChars(dest, destCapacity, reqLength, pErrorCode);
- return dest;
- }
- srcLength = uprv_strlen((const char *)pSrc);
- }
-
- /* Faster loop without ongoing checking for pSrcLimit and pDestLimit. */
- pSrcLimit = pSrc + srcLength;
- for(;;) {
- count = (int32_t)(pDestLimit - pDest);
- srcLength = (int32_t)(pSrcLimit - pSrc);
- if(count >= srcLength && srcLength > 0 && *pSrc <= 0x7f) {
- /* fast ASCII loop */
- const uint8_t *prevSrc = pSrc;
- int32_t delta;
- while(pSrc < pSrcLimit && (ch = *pSrc) <= 0x7f) {
- *pDest++=(UChar)ch;
- ++pSrc;
- }
- delta = (int32_t)(pSrc - prevSrc);
- count -= delta;
- srcLength -= delta;
- }
- /*
- * Each iteration of the inner loop progresses by at most 3 UTF-8
- * bytes and one UChar.
- */
- srcLength /= 3;
- if(count > srcLength) {
- count = srcLength; /* min(remaining dest, remaining src/3) */
- }
- if(count < 3) {
- /*
- * Too much overhead if we get near the end of the string,
- * continue with the next loop.
- */
- break;
- }
- do {
- ch = *pSrc;
- if(ch <= 0x7f){
- *pDest++=(UChar)ch;
- ++pSrc;
- } else {
- if(ch >= 0xe0) {
- if( /* handle U+0000..U+FFFF inline */
- ch <= 0xef &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f &&
- (t2 = (uint8_t)(pSrc[2] - 0x80)) <= 0x3f
- ) {
- /* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
- *pDest++ = (UChar)((ch << 12) | (t1 << 6) | t2);
- pSrc += 3;
- continue;
- }
- } else {
- if( /* handle U+0000..U+07FF inline */
- ch >= 0xc0 &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f
- ) {
- *pDest++ = (UChar)(((ch & 0x1f) << 6) | t1);
- pSrc += 2;
- continue;
- }
- }
-
- if(subchar < 0) {
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- } else if(subchar > 0xffff && --count == 0) {
- /*
- * We need to write two UChars, adjusted count for that,
- * and ran out of space.
- */
- break;
- } else {
- /* function call for error cases */
- ++pSrc; /* continue after the lead byte */
- utf8_nextCharSafeBodyPointer(&pSrc, pSrcLimit, ch);
- ++numSubstitutions;
- if(subchar<=0xFFFF) {
- *(pDest++)=(UChar)subchar;
- } else {
- *(pDest++)=U16_LEAD(subchar);
- *(pDest++)=U16_TRAIL(subchar);
- }
- }
- }
- } while(--count > 0);
- }
-
- while((pSrc<pSrcLimit) && (pDest<pDestLimit)) {
- ch = *pSrc;
- if(ch <= 0x7f){
- *pDest++=(UChar)ch;
- ++pSrc;
- } else {
- if(ch >= 0xe0) {
- if( /* handle U+0000..U+FFFF inline */
- ch <= 0xef &&
- ((pSrcLimit - pSrc) >= 3) &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f &&
- (t2 = (uint8_t)(pSrc[2] - 0x80)) <= 0x3f
- ) {
- /* no need for (ch & 0xf) because the upper bits are truncated after <<12 in the cast to (UChar) */
- *pDest++ = (UChar)((ch << 12) | (t1 << 6) | t2);
- pSrc += 3;
- continue;
- }
- } else {
- if( /* handle U+0000..U+07FF inline */
- ch >= 0xc0 &&
- ((pSrcLimit - pSrc) >= 2) &&
- (t1 = (uint8_t)(pSrc[1] - 0x80)) <= 0x3f
- ) {
- *pDest++ = (UChar)(((ch & 0x1f) << 6) | t1);
- pSrc += 2;
- continue;
- }
- }
-
- if(subchar < 0) {
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- } else {
- /* function call for error cases */
- ++pSrc; /* continue after the lead byte */
- utf8_nextCharSafeBodyPointer(&pSrc, pSrcLimit, ch);
- ++numSubstitutions;
- if(subchar<=0xFFFF) {
- *(pDest++)=(UChar)subchar;
- } else {
- *(pDest++)=U16_LEAD(subchar);
- if(pDest<pDestLimit) {
- *(pDest++)=U16_TRAIL(subchar);
- } else {
- reqLength++;
- break;
- }
- }
- }
- }
- }
-
- /* do not fill the dest buffer just count the UChars needed */
- while(pSrc < pSrcLimit){
- ch = *pSrc;
- if(ch <= 0x7f) {
- reqLength++;
- ++pSrc;
- } else {
- if(ch >= 0xe0) {
- if( /* handle U+0000..U+FFFF inline */
- ch <= 0xef &&
- ((pSrcLimit - pSrc) >= 3) &&
- (uint8_t)(pSrc[1] - 0x80) <= 0x3f &&
- (uint8_t)(pSrc[2] - 0x80) <= 0x3f
- ) {
- reqLength++;
- pSrc += 3;
- continue;
- }
- } else {
- if( /* handle U+0000..U+07FF inline */
- ch >= 0xc0 &&
- ((pSrcLimit - pSrc) >= 2) &&
- (uint8_t)(pSrc[1] - 0x80) <= 0x3f
- ) {
- reqLength++;
- pSrc += 2;
- continue;
- }
- }
-
- if(subchar < 0) {
- *pErrorCode = U_INVALID_CHAR_FOUND;
- return NULL;
- } else {
- /* function call for error cases */
- ++pSrc; /* continue after the lead byte */
- utf8_nextCharSafeBodyPointer(&pSrc, pSrcLimit, ch);
- ++numSubstitutions;
- reqLength+=U16_LENGTH(ch);
- }
- }
- }
-
- if(pNumSubstitutions!=NULL) {
- *pNumSubstitutions=numSubstitutions;
- }
-
- reqLength+=(int32_t)(pDest - dest);
- if(pDestLength) {
- *pDestLength = reqLength;
- }
-
- /* Terminate the buffer */
- u_terminateUChars(dest, destCapacity, reqLength, pErrorCode);
- return dest;
-}
-
-U_CAPI char* U_EXPORT2
-u_strToJavaModifiedUTF8(
- char *dest,
- int32_t destCapacity,
- int32_t *pDestLength,
- const UChar *src,
- int32_t srcLength,
- UErrorCode *pErrorCode) {
- int32_t reqLength=0;
- uint32_t ch=0;
- uint8_t *pDest = (uint8_t *)dest;
- uint8_t *pDestLimit = pDest + destCapacity;
- const UChar *pSrcLimit;
- int32_t count;
-
- /* args check */
- if(U_FAILURE(*pErrorCode)){
- return NULL;
- }
- if( (src==NULL && srcLength!=0) || srcLength < -1 ||
- (dest==NULL && destCapacity!=0) || destCapacity<0
- ) {
- *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
- return NULL;
- }
-
- if(srcLength==-1) {
- /* Convert NUL-terminated ASCII, then find the string length. */
- while((ch=*src)<=0x7f && ch != 0 && pDest<pDestLimit) {
- *pDest++ = (uint8_t)ch;
- ++src;
- }
- if(ch == 0) {
- reqLength=(int32_t)(pDest - (uint8_t *)dest);
- if(pDestLength) {
- *pDestLength = reqLength;
- }
-
- /* Terminate the buffer */
- u_terminateChars(dest, destCapacity, reqLength, pErrorCode);
- return dest;
- }
- srcLength = u_strlen(src);
- }
-
- /* Faster loop without ongoing checking for pSrcLimit and pDestLimit. */
- pSrcLimit = src+srcLength;
- for(;;) {
- count = (int32_t)(pDestLimit - pDest);
- srcLength = (int32_t)(pSrcLimit - src);
- if(count >= srcLength && srcLength > 0 && *src <= 0x7f) {
- /* fast ASCII loop */
- const UChar *prevSrc = src;
- int32_t delta;
- while(src < pSrcLimit && (ch = *src) <= 0x7f && ch != 0) {
- *pDest++=(uint8_t)ch;
- ++src;
- }
- delta = (int32_t)(src - prevSrc);
- count -= delta;
- srcLength -= delta;
- }
- /*
- * Each iteration of the inner loop progresses by at most 3 UTF-8
- * bytes and one UChar.
- */
- count /= 3;
- if(count > srcLength) {
- count = srcLength; /* min(remaining dest/3, remaining src) */
- }
- if(count < 3) {
- /*
- * Too much overhead if we get near the end of the string,
- * continue with the next loop.
- */
- break;
- }
- do {
- ch=*src++;
- if(ch <= 0x7f && ch != 0) {
- *pDest++ = (uint8_t)ch;
- } else if(ch <= 0x7ff) {
- *pDest++=(uint8_t)((ch>>6)|0xc0);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else {
- *pDest++=(uint8_t)((ch>>12)|0xe0);
- *pDest++=(uint8_t)(((ch>>6)&0x3f)|0x80);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- }
- } while(--count > 0);
- }
-
- while(src<pSrcLimit) {
- ch=*src++;
- if(ch <= 0x7f && ch != 0) {
- if(pDest<pDestLimit) {
- *pDest++ = (uint8_t)ch;
- } else {
- reqLength = 1;
- break;
- }
- } else if(ch <= 0x7ff) {
- if((pDestLimit - pDest) >= 2) {
- *pDest++=(uint8_t)((ch>>6)|0xc0);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else {
- reqLength = 2;
- break;
- }
- } else {
- if((pDestLimit - pDest) >= 3) {
- *pDest++=(uint8_t)((ch>>12)|0xe0);
- *pDest++=(uint8_t)(((ch>>6)&0x3f)|0x80);
- *pDest++=(uint8_t)((ch&0x3f)|0x80);
- } else {
- reqLength = 3;
- break;
- }
- }
- }
- while(src<pSrcLimit) {
- ch=*src++;
- if(ch <= 0x7f && ch != 0) {
- ++reqLength;
- } else if(ch<=0x7ff) {
- reqLength+=2;
- } else {
- reqLength+=3;
- }
- }
-
- reqLength+=(int32_t)(pDest - (uint8_t *)dest);
- if(pDestLength){
- *pDestLength = reqLength;
- }
-
- /* Terminate the buffer */
- u_terminateChars(dest, destCapacity, reqLength, pErrorCode);
- return dest;
-}
projects / apple / icu.git / blobdiff