868 lines
24 KiB
C
868 lines
24 KiB
C
/*
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******************************************************************************
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*
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* Copyright (C) 2001-2003, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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*
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* File ustrtrns.c
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*
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* Modification History:
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*
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* Date Name Description
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* 9/10/2001 Ram Creation.
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******************************************************************************
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*/
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/*******************************************************************************
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*
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* u_strTo* and u_strFrom* APIs
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*
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*******************************************************************************
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*/
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#include "unicode/putil.h"
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#include "unicode/ucnv.h"
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#include "unicode/ustring.h"
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#include "cstring.h"
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#include "cwchar.h"
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#include "cmemory.h"
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#include "ustr_imp.h"
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U_INLINE static UBool
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u_growAnyBufferFromStatic(void *context,
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void **pBuffer, int32_t *pCapacity, int32_t reqCapacity,
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int32_t length, int32_t size) {
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void *newBuffer=uprv_malloc(reqCapacity*size);
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if(newBuffer!=NULL) {
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if(length>0) {
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uprv_memcpy(newBuffer, *pBuffer, length*size);
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}
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*pCapacity=reqCapacity;
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} else {
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*pCapacity=0;
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}
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/* release the old pBuffer if it was not statically allocated */
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if(*pBuffer!=(void *)context) {
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uprv_free(*pBuffer);
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}
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*pBuffer=newBuffer;
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return (UBool)(newBuffer!=NULL);
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}
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#define _STACK_BUFFER_CAPACITY 1000
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U_CAPI UChar* U_EXPORT2
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u_strFromUTF32(UChar *dest,
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int32_t destCapacity,
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int32_t *pDestLength,
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const UChar32 *src,
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int32_t srcLength,
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UErrorCode *pErrorCode)
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{
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int32_t reqLength = 0;
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uint32_t ch =0;
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UChar *pDestLimit =dest+destCapacity;
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UChar *pDest = dest;
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const uint32_t *pSrc = (const uint32_t *)src;
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/* args check */
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
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return NULL;
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}
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if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
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*pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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/* Check if the source is null terminated */
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if(srcLength == -1 ){
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while(((ch=*pSrc)!=0) && (pDest < pDestLimit)){
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++pSrc;
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if(ch<=0xFFFF){
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*(pDest++)=(UChar)ch;
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}else if(ch<=0x10ffff){
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*(pDest++)=UTF16_LEAD(ch);
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if(pDest<pDestLimit){
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*(pDest++)=UTF16_TRAIL(ch);
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}else{
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reqLength++;
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break;
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}
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}else{
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*pErrorCode = U_INVALID_CHAR_FOUND;
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return NULL;
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}
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}
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while((ch=*pSrc++) != 0){
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reqLength+=UTF_CHAR_LENGTH(ch);
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}
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}else{
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const uint32_t* pSrcLimit = ((const uint32_t*)pSrc) + srcLength;
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while((pSrc < pSrcLimit) && (pDest < pDestLimit)){
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ch = *pSrc++;
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if(ch<=0xFFFF){
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*(pDest++)=(UChar)ch;
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}else if(ch<=0x10FFFF){
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*(pDest++)=UTF16_LEAD(ch);
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if(pDest<pDestLimit){
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*(pDest++)=UTF16_TRAIL(ch);
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}else{
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reqLength++;
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break;
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}
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}else{
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*pErrorCode = U_INVALID_CHAR_FOUND;
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return NULL;
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}
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}
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while(pSrc <pSrcLimit){
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ch = *pSrc++;
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reqLength+=UTF_CHAR_LENGTH(ch);
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}
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}
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reqLength += pDest - dest;
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if(pDestLength){
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*pDestLength = reqLength;
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}
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/* Terminate the buffer */
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u_terminateUChars(dest,destCapacity,reqLength,pErrorCode);
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return dest;
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}
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U_CAPI UChar32* U_EXPORT2
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u_strToUTF32(UChar32 *dest,
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int32_t destCapacity,
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int32_t *pDestLength,
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const UChar *src,
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int32_t srcLength,
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UErrorCode *pErrorCode)
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{
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const UChar* pSrc = src;
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const UChar* pSrcLimit;
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int32_t reqLength=0;
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uint32_t ch=0;
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uint32_t *pDest = (uint32_t *)dest;
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uint32_t *pDestLimit = pDest + destCapacity;
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UChar ch2=0;
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/* args check */
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
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return NULL;
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}
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if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
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*pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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if(srcLength==-1) {
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while((ch=*pSrc)!=0 && pDest!=pDestLimit) {
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++pSrc;
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/*need not check for NUL because NUL fails UTF_IS_TRAIL() anyway*/
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if(UTF_IS_LEAD(ch) && UTF_IS_TRAIL(ch2=*pSrc)) {
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++pSrc;
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ch=UTF16_GET_PAIR_VALUE(ch, ch2);
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}
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*(pDest++)= ch;
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}
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while((ch=*pSrc++)!=0) {
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if(UTF_IS_LEAD(ch) && UTF_IS_TRAIL(ch2=*pSrc)) {
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++pSrc;
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}
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++reqLength;
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}
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} else {
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pSrcLimit = pSrc+srcLength;
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while(pSrc<pSrcLimit && pDest<pDestLimit) {
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ch=*pSrc++;
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if(UTF_IS_LEAD(ch) && pSrc<pSrcLimit && UTF_IS_TRAIL(ch2=*pSrc)) {
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++pSrc;
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ch=UTF16_GET_PAIR_VALUE(ch, ch2);
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}
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*(pDest++)= ch;
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}
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while(pSrc!=pSrcLimit) {
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ch=*pSrc++;
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if(UTF_IS_LEAD(ch) && pSrc<pSrcLimit && UTF_IS_TRAIL(ch2=*pSrc)) {
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++pSrc;
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}
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++reqLength;
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}
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}
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reqLength+=(pDest - (uint32_t *)dest);
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if(pDestLength){
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*pDestLength = reqLength;
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}
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/* Terminate the buffer */
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u_terminateUChar32s(dest,destCapacity,reqLength,pErrorCode);
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return dest;
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}
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U_CAPI UChar* U_EXPORT2
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u_strFromUTF8(UChar *dest,
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int32_t destCapacity,
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int32_t *pDestLength,
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const char* src,
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int32_t srcLength,
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UErrorCode *pErrorCode){
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UChar *pDest = dest;
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UChar *pDestLimit = dest+destCapacity;
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UChar32 ch=0;
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int32_t index = 0;
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int32_t reqLength = 0;
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uint8_t* pSrc = (uint8_t*) src;
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/* args check */
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
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return NULL;
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}
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if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
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*pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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if(srcLength == -1){
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srcLength = uprv_strlen((char*)pSrc);
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}
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while((index < srcLength)&&(pDest<pDestLimit)){
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ch = pSrc[index++];
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if(ch <=0x7f){
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*pDest++=(UChar)ch;
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}else{
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ch=utf8_nextCharSafeBody(pSrc, &index, srcLength, ch, FALSE);
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if(ch<=0xFFFF){
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*(pDest++)=(UChar)ch;
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}else if(ch<=0x10ffff){
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*(pDest++)=UTF16_LEAD(ch);
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if(pDest<pDestLimit){
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*(pDest++)=UTF16_TRAIL(ch);
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}else{
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reqLength++;
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break;
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}
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}else{
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*pErrorCode = U_INVALID_CHAR_FOUND;
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return NULL;
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}
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}
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}
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/* donot fill the dest buffer just count the UChars needed */
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while(index < srcLength){
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ch = pSrc[index++];
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if(ch <= 0x7f){
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reqLength++;
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}else{
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ch=utf8_nextCharSafeBody(pSrc, &index, srcLength, ch, FALSE);
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reqLength+=UTF_CHAR_LENGTH(ch);
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}
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}
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reqLength+=(pDest - dest);
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if(pDestLength){
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*pDestLength = reqLength;
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}
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/* Terminate the buffer */
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u_terminateUChars(dest,destCapacity,reqLength,pErrorCode);
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return dest;
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}
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U_INLINE static uint8_t *
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_appendUTF8(uint8_t *pDest, UChar32 c) {
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/* c<=0x7f is handled by the caller, here it is 0x80<=c<=0x10ffff */
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if((c)<=0x7ff) {
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*pDest++=(uint8_t)((c>>6)|0xc0);
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*pDest++=(uint8_t)((c&0x3f)|0x80);
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} else if((uint32_t)(c)<=0xffff) {
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*pDest++=(uint8_t)((c>>12)|0xe0);
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*pDest++=(uint8_t)(((c>>6)&0x3f)|0x80);
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*pDest++=(uint8_t)(((c)&0x3f)|0x80);
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} else /* if((uint32_t)(c)<=0x10ffff) */ {
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*pDest++=(uint8_t)(((c)>>18)|0xf0);
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*pDest++=(uint8_t)((((c)>>12)&0x3f)|0x80);
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*pDest++=(uint8_t)((((c)>>6)&0x3f)|0x80);
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*pDest++=(uint8_t)(((c)&0x3f)|0x80);
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}
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return pDest;
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}
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U_CAPI char* U_EXPORT2
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u_strToUTF8(char *dest,
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int32_t destCapacity,
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int32_t *pDestLength,
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const UChar *pSrc,
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int32_t srcLength,
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UErrorCode *pErrorCode){
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int32_t reqLength=0;
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const UChar *pSrcLimit;
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uint32_t ch=0,ch2=0;
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uint8_t *pDest = (uint8_t *)dest;
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uint8_t *pDestLimit = pDest + destCapacity;
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|
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/* args check */
|
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if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
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return NULL;
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}
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|
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if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
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*pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
|
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}
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|
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if(srcLength==-1) {
|
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while((ch=*pSrc)!=0 && pDest!=pDestLimit) {
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++pSrc;
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if(ch <= 0x7f) {
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*pDest++ = (char)ch;
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++reqLength;
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continue;
|
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}
|
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|
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/*need not check for NUL because NUL fails UTF_IS_TRAIL() anyway*/
|
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if(UTF_IS_LEAD(ch) && UTF_IS_TRAIL(ch2=*pSrc)) {
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++pSrc;
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ch=UTF16_GET_PAIR_VALUE(ch, ch2);
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}
|
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reqLength += UTF8_CHAR_LENGTH(ch);
|
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/* do we have enough room in destination? */
|
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if(destCapacity< reqLength){
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break;
|
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}
|
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/* convert and append*/
|
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pDest=_appendUTF8(pDest, ch);
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}
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while((ch=*pSrc++)!=0) {
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if(UTF_IS_LEAD(ch) && UTF_IS_TRAIL(ch2=*pSrc)) {
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++pSrc;
|
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reqLength+=4;
|
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} else {
|
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reqLength+=UTF8_CHAR_LENGTH(ch);
|
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}
|
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}
|
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} else {
|
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pSrcLimit = pSrc+srcLength;
|
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while(pSrc<pSrcLimit && pDest<pDestLimit) {
|
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ch=*pSrc++;
|
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if(ch <= 0x7f) {
|
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*pDest++ = (char)ch;
|
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++reqLength;
|
|
continue;
|
|
}
|
|
|
|
if(UTF_IS_LEAD(ch) && pSrc<pSrcLimit && UTF_IS_TRAIL(ch2=*pSrc)) {
|
|
++pSrc;
|
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ch=UTF16_GET_PAIR_VALUE(ch, ch2);
|
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}
|
|
reqLength += UTF8_CHAR_LENGTH(ch);
|
|
/* do we have enough room in destination? */
|
|
if(destCapacity< reqLength){
|
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break;
|
|
}
|
|
/* convert and append*/
|
|
pDest=_appendUTF8(pDest, ch);
|
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}
|
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while(pSrc<pSrcLimit) {
|
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ch=*pSrc++;
|
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if(UTF_IS_LEAD(ch) && pSrc<pSrcLimit && UTF_IS_TRAIL(ch2=*pSrc)) {
|
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++pSrc;
|
|
reqLength+=4;
|
|
} else {
|
|
reqLength+=UTF8_CHAR_LENGTH(ch);
|
|
}
|
|
}
|
|
}
|
|
|
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if(pDestLength){
|
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*pDestLength = reqLength;
|
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}
|
|
|
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/* Terminate the buffer */
|
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u_terminateChars((char*)dest,destCapacity,reqLength,pErrorCode);
|
|
|
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return (char*)dest;
|
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}
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|
|
#if !defined(U_WCHAR_IS_UTF16) && !defined(U_WCHAR_IS_UTF32)
|
|
/* helper function */
|
|
static wchar_t*
|
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_strToWCS(wchar_t *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode){
|
|
|
|
char stackBuffer [_STACK_BUFFER_CAPACITY];
|
|
char* tempBuf = stackBuffer;
|
|
int32_t tempBufCapacity = _STACK_BUFFER_CAPACITY;
|
|
char* tempBufLimit = stackBuffer + tempBufCapacity;
|
|
UConverter* conv = NULL;
|
|
char* saveBuf = tempBuf;
|
|
wchar_t* intTarget=NULL;
|
|
int32_t intTargetCapacity=0;
|
|
int count=0,retVal=0;
|
|
|
|
const UChar *pSrcLimit =NULL;
|
|
const UChar *pSrc = src;
|
|
|
|
conv = u_getDefaultConverter(pErrorCode);
|
|
|
|
if(U_FAILURE(*pErrorCode)){
|
|
return NULL;
|
|
}
|
|
|
|
if(srcLength == -1){
|
|
srcLength = u_strlen(pSrc);
|
|
}
|
|
|
|
pSrcLimit = pSrc + srcLength;
|
|
|
|
for(;;) {
|
|
/* reset the error state */
|
|
*pErrorCode = U_ZERO_ERROR;
|
|
|
|
/* convert to chars using default converter */
|
|
ucnv_fromUnicode(conv,&tempBuf,tempBufLimit,&pSrc,pSrcLimit,NULL,(UBool)(pSrc==pSrcLimit),pErrorCode);
|
|
count =(tempBuf - saveBuf);
|
|
|
|
/* This should rarely occur */
|
|
if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR){
|
|
tempBuf = saveBuf;
|
|
|
|
/* we dont have enough room on the stack grow the buffer */
|
|
if(!u_growAnyBufferFromStatic(stackBuffer,(void**) &tempBuf, &tempBufCapacity,
|
|
(2*(pSrcLimit-pSrc)+100), count,sizeof(char))){
|
|
goto cleanup;
|
|
}
|
|
|
|
saveBuf = tempBuf;
|
|
tempBufLimit = tempBuf + tempBufCapacity;
|
|
tempBuf = tempBuf + count;
|
|
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(U_FAILURE(*pErrorCode)){
|
|
goto cleanup;
|
|
}
|
|
|
|
/* done with conversion null terminate the char buffer */
|
|
if(count>=tempBufCapacity){
|
|
tempBuf = saveBuf;
|
|
/* we dont have enough room on the stack grow the buffer */
|
|
if(!u_growAnyBufferFromStatic(stackBuffer,(void**) &tempBuf, &tempBufCapacity,
|
|
tempBufCapacity-count+1, count,sizeof(char))){
|
|
goto cleanup;
|
|
}
|
|
saveBuf = tempBuf;
|
|
}
|
|
|
|
saveBuf[count]=0;
|
|
|
|
|
|
/* allocate more space than required
|
|
* here we assume that every char requires
|
|
* no more than 2 wchar_ts
|
|
*/
|
|
intTargetCapacity = (count*2+1) /*for null termination */;
|
|
intTarget = (wchar_t*)uprv_malloc( intTargetCapacity * sizeof(wchar_t) );
|
|
|
|
if(intTarget){
|
|
|
|
int32_t nulLen = 0;
|
|
int32_t remaining = intTargetCapacity;
|
|
wchar_t* pIntTarget=intTarget;
|
|
tempBuf = saveBuf;
|
|
|
|
/* now convert the mbs to wcs */
|
|
for(;;){
|
|
|
|
/* we can call the system API since we are sure that
|
|
* there is atleast 1 null in the input
|
|
*/
|
|
retVal = uprv_mbstowcs(pIntTarget,(tempBuf+nulLen),remaining);
|
|
|
|
if(retVal==-1){
|
|
*pErrorCode = U_INVALID_CHAR_FOUND;
|
|
break;
|
|
}else if(retVal== remaining){/* should never occur */
|
|
int numWritten = (pIntTarget-intTarget);
|
|
u_growAnyBufferFromStatic(NULL,(void**) &intTarget,
|
|
&intTargetCapacity,
|
|
intTargetCapacity*2,
|
|
numWritten,
|
|
sizeof(wchar_t));
|
|
pIntTarget = intTarget;
|
|
remaining=intTargetCapacity;
|
|
|
|
if(nulLen!=count){ /*there are embedded nulls*/
|
|
pIntTarget+=numWritten;
|
|
remaining-=numWritten;
|
|
}
|
|
|
|
}else{
|
|
/*scan for nulls */
|
|
/* we donot check for limit since tempBuf is null terminated */
|
|
while(tempBuf[nulLen++] != 0){
|
|
}
|
|
pIntTarget = pIntTarget + retVal+1;
|
|
remaining -=(retVal+1);
|
|
|
|
/* check if we have reached the source limit*/
|
|
if(nulLen>=(count)){
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
count = (int32_t)(pIntTarget-intTarget);
|
|
|
|
if(0 < count && count <= destCapacity){
|
|
uprv_memcpy(dest,intTarget,count*sizeof(wchar_t));
|
|
}
|
|
|
|
if(pDestLength){
|
|
*pDestLength = count;
|
|
}
|
|
|
|
/* free the allocated memory */
|
|
uprv_free(intTarget);
|
|
|
|
}else{
|
|
*pErrorCode = U_MEMORY_ALLOCATION_ERROR;
|
|
}
|
|
cleanup:
|
|
/* are we still using stack buffer */
|
|
if(stackBuffer != saveBuf){
|
|
uprv_free(saveBuf);
|
|
}
|
|
u_terminateWChars(dest,destCapacity,count,pErrorCode);
|
|
|
|
u_releaseDefaultConverter(conv);
|
|
|
|
return dest;
|
|
}
|
|
#endif
|
|
|
|
U_CAPI wchar_t* U_EXPORT2
|
|
u_strToWCS(wchar_t *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode){
|
|
|
|
/* args check */
|
|
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
|
|
return NULL;
|
|
}
|
|
|
|
if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
|
|
*pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef U_WCHAR_IS_UTF16
|
|
/* wchar_t is UTF-16 just do a memcpy */
|
|
if(srcLength == -1){
|
|
srcLength = u_strlen(src);
|
|
}
|
|
if(0 < srcLength && srcLength <= destCapacity){
|
|
uprv_memcpy(dest,src,srcLength*U_SIZEOF_UCHAR);
|
|
}
|
|
if(pDestLength){
|
|
*pDestLength = srcLength;
|
|
}
|
|
|
|
u_terminateUChars(dest,destCapacity,srcLength,pErrorCode);
|
|
|
|
return dest;
|
|
|
|
#elif defined U_WCHAR_IS_UTF32
|
|
|
|
return u_strToUTF32(dest,destCapacity,pDestLength,src,srcLength,pErrorCode);
|
|
|
|
#else
|
|
|
|
return _strToWCS(dest,destCapacity,pDestLength,src,srcLength, pErrorCode);
|
|
|
|
#endif
|
|
}
|
|
|
|
#if !defined(U_WCHAR_IS_UTF16) && !defined(U_WCHAR_IS_UTF32)
|
|
/* helper function */
|
|
static UChar*
|
|
_strFromWCS( UChar *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const wchar_t *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode){
|
|
|
|
int32_t retVal =0, count =0 ;
|
|
UConverter* conv = NULL;
|
|
UChar* pTarget = NULL;
|
|
UChar* pTargetLimit = NULL;
|
|
UChar* target = NULL;
|
|
|
|
UChar uStack [_STACK_BUFFER_CAPACITY];
|
|
|
|
wchar_t wStack[_STACK_BUFFER_CAPACITY];
|
|
wchar_t* pWStack = wStack;
|
|
|
|
|
|
char cStack[_STACK_BUFFER_CAPACITY];
|
|
int32_t cStackCap = _STACK_BUFFER_CAPACITY;
|
|
char* pCSrc=cStack;
|
|
char* pCSave=pCSrc;
|
|
char* pCSrcLimit=NULL;
|
|
|
|
const wchar_t* pSrc = src;
|
|
const wchar_t* pSrcLimit = NULL;
|
|
|
|
if(srcLength ==-1){
|
|
/* if the wchar_t source is null terminated we can safely
|
|
* assume that there are no embedded nulls, this is a fast
|
|
* path for null terminated strings.
|
|
*/
|
|
for(;;){
|
|
/* convert wchars to chars */
|
|
retVal = uprv_wcstombs(pCSrc,src, cStackCap);
|
|
|
|
if(retVal == -1){
|
|
*pErrorCode = U_ILLEGAL_CHAR_FOUND;
|
|
goto cleanup;
|
|
}else if(retVal == cStackCap){
|
|
/* Should rarely occur */
|
|
u_growAnyBufferFromStatic(cStack,(void**)&pCSrc,&cStackCap,
|
|
cStackCap*2,0,sizeof(char));
|
|
pCSave = pCSrc;
|
|
}else{
|
|
/* converted every thing */
|
|
pCSrc = pCSrc+retVal;
|
|
break;
|
|
}
|
|
}
|
|
|
|
}else{
|
|
/* here the source is not null terminated
|
|
* so it may have nulls embeded and we need to
|
|
* do some extra processing
|
|
*/
|
|
int32_t remaining =cStackCap;
|
|
|
|
pSrcLimit = src + srcLength;
|
|
|
|
for(;;){
|
|
register int32_t nulLen = 0;
|
|
|
|
/* find nulls in the string */
|
|
while(nulLen<srcLength && pSrc[nulLen++]!=0){
|
|
}
|
|
|
|
if((pSrc+nulLen) < pSrcLimit){
|
|
/* check if we have enough room in pCSrc */
|
|
if(remaining < (nulLen * MB_CUR_MAX)){
|
|
/* should rarely occur */
|
|
int32_t len = (pCSrc-pCSave);
|
|
pCSrc = pCSave;
|
|
/* we do not have enough room so grow the buffer*/
|
|
u_growAnyBufferFromStatic(cStack,(void**)&pCSrc,&cStackCap,
|
|
2*cStackCap+(nulLen*MB_CUR_MAX),len,sizeof(char));
|
|
|
|
pCSave = pCSrc;
|
|
pCSrc = pCSave+len;
|
|
remaining = cStackCap-(pCSrc - pCSave);
|
|
}
|
|
|
|
/* we have found a null so convert the
|
|
* chunk from begining of non-null char to null
|
|
*/
|
|
retVal = uprv_wcstombs(pCSrc,pSrc,remaining);
|
|
|
|
if(retVal==-1){
|
|
/* an error occurred bail out */
|
|
*pErrorCode = U_ILLEGAL_CHAR_FOUND;
|
|
goto cleanup;
|
|
}
|
|
|
|
pCSrc += retVal+1 /* already null terminated */;
|
|
|
|
pSrc += nulLen; /* skip past the null */
|
|
srcLength-=nulLen; /* decrement the srcLength */
|
|
remaining -= (pCSrc-pCSave);
|
|
|
|
|
|
}else{
|
|
/* the source is not null terminated and we are
|
|
* end of source so we copy the source to a temp buffer
|
|
* null terminate it and convert wchar_ts to chars
|
|
*/
|
|
if(nulLen > _STACK_BUFFER_CAPACITY){
|
|
/* Should rarely occcur */
|
|
/* allocate new buffer buffer */
|
|
pWStack =(wchar_t*) uprv_malloc(sizeof(wchar_t) * nulLen);
|
|
if(pWStack==NULL){
|
|
*pErrorCode = U_MEMORY_ALLOCATION_ERROR;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
if(nulLen>0){
|
|
/* copy the contents to tempStack */
|
|
uprv_memcpy(pWStack,pSrc,nulLen*sizeof(wchar_t));
|
|
}
|
|
|
|
/* null terminate the tempBuffer */
|
|
pWStack[nulLen] =0 ;
|
|
|
|
if(remaining < (nulLen * MB_CUR_MAX)){
|
|
/* Should rarely occur */
|
|
int32_t len = (pCSrc-pCSave);
|
|
pCSrc = pCSave;
|
|
/* we do not have enough room so grow the buffer*/
|
|
u_growAnyBufferFromStatic(cStack,(void**)&pCSrc,&cStackCap,
|
|
cStackCap+(nulLen*MB_CUR_MAX),len,sizeof(char));
|
|
|
|
pCSave = pCSrc;
|
|
pCSrc = pCSave+len;
|
|
remaining = cStackCap-(pCSrc - pCSave);
|
|
}
|
|
/* convert to chars */
|
|
retVal = uprv_wcstombs(pCSrc,pWStack,remaining);
|
|
|
|
pCSrc += retVal +1;
|
|
pSrc += nulLen;
|
|
srcLength-=nulLen; /* decrement the srcLength */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* OK..now we have converted from wchar_ts to chars now
|
|
* convert chars to UChars
|
|
*/
|
|
pCSrcLimit = pCSrc;
|
|
pCSrc = pCSave;
|
|
pTarget = target= dest;
|
|
pTargetLimit = dest + destCapacity;
|
|
|
|
conv= u_getDefaultConverter(pErrorCode);
|
|
|
|
if(U_FAILURE(*pErrorCode)|| conv==NULL){
|
|
goto cleanup;
|
|
}
|
|
|
|
for(;;) {
|
|
|
|
*pErrorCode = U_ZERO_ERROR;
|
|
|
|
/* convert to stack buffer*/
|
|
ucnv_toUnicode(conv,&pTarget,pTargetLimit,(const char**)&pCSrc,pCSrcLimit,NULL,(UBool)(pCSrc==pCSrcLimit),pErrorCode);
|
|
|
|
/* increment count to number written to stack */
|
|
count+= pTarget - target;
|
|
|
|
if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR){
|
|
target = uStack;
|
|
pTarget = uStack;
|
|
pTargetLimit = uStack + _STACK_BUFFER_CAPACITY;
|
|
} else {
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
if(pDestLength){
|
|
*pDestLength =count;
|
|
}
|
|
|
|
u_terminateUChars(dest,destCapacity,count,pErrorCode);
|
|
|
|
cleanup:
|
|
|
|
if(cStack != pCSave){
|
|
uprv_free(pCSave);
|
|
}
|
|
|
|
if(wStack != pWStack){
|
|
uprv_free(pWStack);
|
|
}
|
|
|
|
u_releaseDefaultConverter(conv);
|
|
|
|
return dest;
|
|
}
|
|
#endif
|
|
|
|
U_CAPI UChar* U_EXPORT2
|
|
u_strFromWCS(UChar *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const wchar_t *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode)
|
|
{
|
|
|
|
/* args check */
|
|
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)){
|
|
return NULL;
|
|
}
|
|
|
|
if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
|
|
*pErrorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef U_WCHAR_IS_UTF16
|
|
/* wchar_t is UTF-16 just do a memcpy */
|
|
if(srcLength == -1){
|
|
srcLength = u_strlen(src);
|
|
}
|
|
if(0 < srcLength && srcLength <= destCapacity){
|
|
uprv_memcpy(dest,src,srcLength*U_SIZEOF_UCHAR);
|
|
}
|
|
if(pDestLength){
|
|
*pDestLength = srcLength;
|
|
}
|
|
|
|
u_terminateUChars(dest,destCapacity,srcLength,pErrorCode);
|
|
|
|
return dest;
|
|
|
|
#elif defined U_WCHAR_IS_UTF32
|
|
|
|
return u_strFromUTF32(dest,destCapacity,pDestLength,src,srcLength,pErrorCode);
|
|
|
|
#else
|
|
|
|
return _strFromWCS(dest,destCapacity,pDestLength,src,srcLength,pErrorCode);
|
|
|
|
#endif
|
|
|
|
}
|