| /* |
| ****************************************************************************** |
| * |
| * Copyright (C) 2001-2003, 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 |
| * |
| ******************************************************************************* |
| */ |
| |
| |
| #include "unicode/putil.h" |
| #include "unicode/ucnv.h" |
| #include "unicode/ustring.h" |
| #include "cstring.h" |
| #include "cwchar.h" |
| #include "cmemory.h" |
| #include "ustr_imp.h" |
| |
| |
| U_CAPI UBool /* U_CALLCONV U_EXPORT2 */ |
| u_growAnyBufferFromStatic(void *context, |
| void **pBuffer, int32_t *pCapacity, int32_t reqCapacity, |
| int32_t length, int32_t size); |
| |
| U_CAPI UBool /* U_CALLCONV U_EXPORT2 */ |
| u_growAnyBufferFromStatic(void *context, |
| void **pBuffer, int32_t *pCapacity, int32_t reqCapacity, |
| int32_t length, int32_t size) { |
| |
| void *newBuffer=uprv_malloc(reqCapacity*size); |
| if(newBuffer!=NULL) { |
| if(length>0) { |
| uprv_memcpy(newBuffer, *pBuffer, length*size); |
| } |
| *pCapacity=reqCapacity; |
| } else { |
| *pCapacity=0; |
| } |
| |
| /* release the old pBuffer if it was not statically allocated */ |
| if(*pBuffer!=(void *)context) { |
| uprv_free(*pBuffer); |
| } |
| |
| *pBuffer=newBuffer; |
| return (UBool)(newBuffer!=NULL); |
| } |
| |
| #define _STACK_BUFFER_CAPACITY 1000 |
| |
| U_CAPI UChar* U_EXPORT2 |
| u_strFromUTF32(UChar *dest, |
| int32_t destCapacity, |
| int32_t *pDestLength, |
| const UChar32 *src, |
| int32_t srcLength, |
| UErrorCode *pErrorCode) |
| { |
| int32_t reqLength = 0; |
| uint32_t ch =0; |
| UChar *pDestLimit =dest+destCapacity; |
| UChar *pDest = dest; |
| const uint32_t *pSrc = (const uint32_t *)src; |
| |
| /* args check */ |
| if(pErrorCode && U_FAILURE(*pErrorCode)){ |
| return NULL; |
| } |
| |
| if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){ |
| *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| /* Check if the source is null terminated */ |
| if(srcLength == -1 ){ |
| while((ch=*pSrc)!=0){ |
| if(pDest < pDestLimit){ |
| ++pSrc; |
| if(ch<=0xFFFF){ |
| *(pDest++)=(UChar)ch; |
| }else{ |
| *(pDest++)=(uint16_t)((ch>>10)+0xd7c0); /*UTF_FIRST_SURROGATE(ch);*/ |
| if(pDest<pDestLimit){ |
| *(pDest++)=(uint16_t)((ch&0x3ff)|0xdc00); /*UTF_SECOND_SURROGATE(ch);*/ |
| }else{ |
| reqLength++; |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| while((ch=*pSrc++) != 0){ |
| reqLength+=UTF_CHAR_LENGTH(ch); |
| } |
| }else{ |
| const uint32_t* pSrcLimit = ((const uint32_t*)pSrc) + srcLength; |
| while(pSrc<pSrcLimit){ |
| if(pDest < pDestLimit){ |
| ch = *pSrc++; |
| if(ch<=0xFFFF){ |
| *(pDest++)=(UChar)ch; |
| }else{ |
| *(pDest++)=(uint16_t)((ch>>10)+0xd7c0); /*UTF_FIRST_SURROGATE(ch);*/ |
| if(pDest<pDestLimit){ |
| *(pDest++)=(uint16_t)((ch&0x3ff)|0xdc00); /*UTF_SECOND_SURROGATE(ch);*/ |
| }else{ |
| reqLength++; |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| while(pSrc <pSrcLimit){ |
| ch = *pSrc++; |
| reqLength+=UTF_CHAR_LENGTH(ch); |
| } |
| } |
| |
| /* return the required length */ |
| reqLength+=(pDest - dest); |
| |
| if(pDestLength){ |
| *pDestLength = reqLength; |
| } |
| |
| /* Terminate the buffer */ |
| u_terminateUChars(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) |
| { |
| const UChar* pSrc = src; |
| int32_t reqLength=0; |
| uint32_t ch=0; |
| int32_t index=0; |
| uint32_t *pDest = (uint32_t *)dest; |
| uint32_t *pDestLimit = pDest + destCapacity; |
| |
| /* args check */ |
| if(pErrorCode && U_FAILURE(*pErrorCode)){ |
| return NULL; |
| } |
| |
| if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){ |
| *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| if(srcLength == -1){ |
| srcLength = u_strlen(pSrc); |
| } |
| |
| while(index < srcLength){ |
| if(pDest <pDestLimit){ |
| UTF16_NEXT_CHAR_SAFE(src, index, srcLength, ch, TRUE); |
| if(ch!=UTF_ERROR_VALUE){ |
| *(pDest++)= ch; |
| }else{ |
| *pErrorCode = U_ILLEGAL_CHAR_FOUND; |
| return NULL; |
| } |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| /* donot fill the dest buffer just count the UChars needed */ |
| while(index < srcLength){ |
| UTF16_NEXT_CHAR_SAFE(src, index, srcLength, ch, TRUE); |
| if(ch!=UTF_ERROR_VALUE){ |
| reqLength++; |
| }else{ |
| *pErrorCode = U_ILLEGAL_CHAR_FOUND; |
| return NULL; |
| } |
| } |
| |
| reqLength+=(pDest - (uint32_t *)dest); |
| if(pDestLength){ |
| *pDestLength = reqLength; |
| } |
| |
| /* Terminate the buffer */ |
| u_terminateUChar32s(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){ |
| |
| UChar *pDest = dest; |
| UChar *pDestLimit = dest+destCapacity; |
| UChar32 ch=0; |
| int32_t index = 0; |
| int32_t reqLength = 0; |
| uint8_t* pSrc = (uint8_t*) src; |
| |
| /* args check */ |
| if(pErrorCode && U_FAILURE(*pErrorCode)){ |
| return NULL; |
| } |
| |
| if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){ |
| *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| if(srcLength == -1){ |
| srcLength = uprv_strlen((char*)pSrc); |
| } |
| |
| while(index < srcLength){ |
| if(pDest <pDestLimit){ |
| ch = pSrc[index++]; |
| if(ch <=0x7f){ |
| *pDest++=(UChar)ch; |
| }else{ |
| ch=utf8_nextCharSafeBody(pSrc, &index, srcLength, ch, FALSE); |
| if(ch<=0xFFFF){ |
| *(pDest++)=(UChar)ch; |
| }else{ |
| *(pDest++)=(uint16_t)((ch>>10)+0xd7c0); /*UTF_FIRST_SURROGATE(ch);*/ |
| if(pDest<pDestLimit){ |
| *(pDest++)=(uint16_t)((ch&0x3ff)|0xdc00); /*UTF_SECOND_SURROGATE(ch);*/ |
| }else{ |
| reqLength++; |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| } |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| /* donot fill the dest buffer just count the UChars needed */ |
| while(index < srcLength){ |
| ch = pSrc[index++]; |
| if(ch <= 0x7f){ |
| reqLength++; |
| }else{ |
| ch=utf8_nextCharSafeBody(pSrc, &index, srcLength, ch, FALSE); |
| reqLength+=UTF_CHAR_LENGTH(ch); |
| } |
| } |
| |
| reqLength+=(pDest - dest); |
| |
| if(pDestLength){ |
| *pDestLength = reqLength; |
| } |
| |
| /* Terminate the buffer */ |
| u_terminateUChars(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){ |
| |
| int32_t reqLength=0; |
| const UChar *pSrcLimit; |
| uint32_t ch; |
| |
| /* args check */ |
| if(pErrorCode && U_FAILURE(*pErrorCode)){ |
| return NULL; |
| } |
| |
| if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){ |
| *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| if(srcLength == -1){ |
| while(*pSrc!=0){ |
| if(reqLength < destCapacity){ |
| ch = *pSrc++; |
| if(ch<=0x7f) { |
| dest[reqLength++]=(uint8_t)ch; |
| } else { |
| int num = utf8_appendCharSafeBody((uint8_t*)dest, reqLength, destCapacity, ch); |
| if(num==reqLength){ |
| *pErrorCode =U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| reqLength = num; |
| } |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| while(*pSrc!=0){ |
| ch = *pSrc++; |
| reqLength+=UTF8_CHAR_LENGTH(ch); |
| } |
| }else{ |
| pSrcLimit = pSrc + srcLength; |
| while(pSrc < pSrcLimit){ |
| if(reqLength < destCapacity){ |
| ch = *pSrc++; |
| if(ch<=0x7f) { |
| dest[reqLength++]=(uint8_t)ch; |
| } else { |
| int num = utf8_appendCharSafeBody((uint8_t*)dest, reqLength, destCapacity, ch); |
| if(num==reqLength){ |
| *pErrorCode =U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| reqLength = num; |
| } |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| break; |
| } |
| } |
| while(pSrc < pSrcLimit){ |
| ch = *pSrc++; |
| reqLength+=UTF8_CHAR_LENGTH(ch); |
| } |
| } |
| if(destCapacity==0){ |
| reqLength+=destCapacity; |
| } |
| if(pDestLength){ |
| *pDestLength = reqLength; |
| } |
| |
| /* Terminate the buffer */ |
| u_terminateChars((char*)dest,destCapacity,reqLength,pErrorCode); |
| |
| return (char*)dest; |
| } |
| |
| /* helper function */ |
| static wchar_t* |
| _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; |
| int count=0,retVal=0; |
| |
| const UChar *pSrcLimit =NULL; |
| const UChar *pSrc = src; |
| pSrcLimit = pSrc + srcLength; |
| conv = u_getDefaultConverter(pErrorCode); |
| do{ |
| /* convert to chars using default converter */ |
| ucnv_fromUnicode(conv,&tempBuf,tempBufLimit,&pSrc,pSrcLimit,NULL,FALSE,pErrorCode); |
| |
| /* This should rarely occur */ |
| if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR){ |
| int32_t bufCount = tempBuf - saveBuf; |
| *pErrorCode=U_ZERO_ERROR; |
| tempBuf = saveBuf; |
| /* we dont have enough room on the stack grow the buffer */ |
| u_growAnyBufferFromStatic(stackBuffer,(void**) &tempBuf, &tempBufCapacity, |
| (tempBufCapacity+_STACK_BUFFER_CAPACITY), bufCount,sizeof(char)); |
| |
| saveBuf = tempBuf; |
| tempBufLimit = tempBuf + tempBufCapacity; |
| tempBuf = tempBuf + bufCount; |
| /* to flush the converters internal state when pSrc<pSrcLimit */ |
| continue; |
| |
| } |
| |
| }while (pSrc<pSrcLimit); |
| |
| count =(tempBuf - saveBuf); |
| |
| /* allocate more space than required |
| * here we assume that every char requires |
| * no more than 2 wchar_ts |
| */ |
| intTarget = (wchar_t*)uprv_malloc( ((count * 2)+1/* for null termination */) * sizeof(wchar_t) ); |
| |
| if(intTarget){ |
| |
| int nulLen = 0; |
| wchar_t* pIntTarget=intTarget; |
| |
| /* null terminate the UChar buffer */ |
| u_terminateChars((char*)saveBuf,(tempBufLimit-saveBuf),count,pErrorCode); |
| |
| 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),(count+1)); |
| |
| if(retVal==-1){ |
| *pErrorCode = U_INVALID_CHAR_FOUND; |
| break; |
| } |
| |
| /*scan for nulls */ |
| /* we donot check for limit since tempBuf is null terminated */ |
| while(tempBuf[nulLen++] != 0){ |
| } |
| |
| /* check if we have reached the source limit*/ |
| if(nulLen>=(count)){ |
| break; |
| } |
| pIntTarget = pIntTarget + retVal+1/* for terminating null*/; |
| } |
| |
| if(count < destCapacity){ |
| uprv_memcpy(dest,intTarget,count*sizeof(wchar_t)); |
| |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| } |
| |
| if(pDestLength){ |
| *pDestLength = count; |
| } |
| |
| /* free the allocated memory */ |
| uprv_free(intTarget); |
| |
| }else{ |
| *pErrorCode = U_MEMORY_ALLOCATION_ERROR; |
| } |
| |
| /* are we still using stack buffer */ |
| if(stackBuffer != saveBuf){ |
| uprv_free(saveBuf); |
| } |
| u_terminateWChars(dest,destCapacity,count,pErrorCode); |
| |
| u_releaseDefaultConverter(conv); |
| |
| return dest; |
| } |
| |
| 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){ |
| |
| const UChar *pSrc = src; |
| |
| /* args check */ |
| if(pErrorCode && U_FAILURE(*pErrorCode)){ |
| return NULL; |
| } |
| |
| if((srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){ |
| *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| if(srcLength == -1){ |
| srcLength = u_strlen(pSrc); |
| } |
| |
| #ifdef U_WCHAR_IS_UTF16 |
| /* wchar_t is UTF-16 just do a memcpy */ |
| if(srcLength==-1){ |
| srcLength =0; |
| while(pSrc[srcLength++]!=0){ |
| } |
| } |
| if(srcLength <= destCapacity){ |
| uprv_memcpy(dest,src,srcLength*U_SIZEOF_UCHAR); |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| } |
| 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 |
| } |
| |
| /* 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 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(;;){ |
| int32_t nulLen = 0; |
| |
| /* find nulls in the string */ |
| while((pSrc+nulLen)<pSrcLimit && 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 = pCSrc + retVal+1 /* already null terminated */; |
| |
| pSrc = pSrc+nulLen; /* skip past the null */ |
| |
| 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); |
| } |
| /* 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 = pCSrc+retVal +1; |
| pSrc = pSrc + nulLen; |
| } |
| |
| /* ran out of input, break */ |
| if(pSrc >= pSrcLimit){ |
| break; |
| } |
| |
| } |
| |
| } |
| |
| /* OK..now we have converted from wchar_ts to chars now |
| * convert chars to UChars |
| */ |
| pCSrcLimit = pCSrc; |
| pCSrc = pCSave; |
| pTarget = dest; |
| pTargetLimit = dest + destCapacity; |
| |
| conv= u_getDefaultConverter(pErrorCode); |
| |
| /* convert and write to the target */ |
| ucnv_toUnicode(conv,&pTarget,pTargetLimit,(const char**)&pCSrc,pCSrcLimit,NULL,FALSE,pErrorCode); |
| /* count the number converted */ |
| count=pTarget - dest; |
| |
| while(*pErrorCode ==U_BUFFER_OVERFLOW_ERROR){ |
| |
| *pErrorCode = U_ZERO_ERROR; |
| |
| pTarget = uStack; |
| pTargetLimit = uStack + _STACK_BUFFER_CAPACITY; |
| |
| /* convert to stack buffer*/ |
| ucnv_toUnicode(conv,&pTarget,pTargetLimit,(const char**)&pCSrc,pCSrcLimit,NULL,FALSE,pErrorCode); |
| |
| /* increment count to number written to stack */ |
| count+= pTarget - uStack; |
| } |
| |
| 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; |
| } |
| |
| 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 && 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 |
| { |
| const wchar_t* pSrc = src; |
| /* wchar_t is UTF-16 just do a memcpy */ |
| if(srcLength==-1){ |
| srcLength =0; |
| while(pSrc[srcLength++]!=0){ |
| } |
| } |
| if(srcLength <= destCapacity){ |
| uprv_memcpy(dest,src,srcLength*U_SIZEOF_UCHAR); |
| }else{ |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| } |
| 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 |
| |
| } |
