| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 1998-2006, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * |
| * File ucbuf.c |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 05/10/01 Ram Creation. |
| ******************************************************************************* |
| */ |
| |
| #include "unicode/utypes.h" |
| #include "unicode/putil.h" |
| #include "unicode/ucnv.h" |
| #include "unicode/ucnv_err.h" |
| #include "filestrm.h" |
| #include "cstring.h" |
| #include "cmemory.h" |
| #include "ustrfmt.h" |
| #include "unicode/ustring.h" |
| #include "unicode/uchar.h" |
| #include "ucbuf.h" |
| #include <stdio.h> |
| |
| #if !UCONFIG_NO_CONVERSION |
| |
| |
| #define MAX_IN_BUF 1000 |
| #define MAX_U_BUF 1500 |
| #define CONTEXT_LEN 15 |
| |
| struct UCHARBUF { |
| UChar* buffer; |
| UChar* currentPos; |
| UChar* bufLimit; |
| int32_t bufCapacity; |
| int32_t remaining; |
| int32_t signatureLength; |
| FileStream* in; |
| UConverter* conv; |
| UBool showWarning; /* makes this API not produce any errors */ |
| UBool isBuffered; |
| }; |
| |
| U_CAPI UBool U_EXPORT2 |
| ucbuf_autodetect_fs(FileStream* in, const char** cp, UConverter** conv, int32_t* signatureLength, UErrorCode* error){ |
| char start[8]; |
| int32_t numRead; |
| |
| UChar target[1]={ 0 }; |
| UChar* pTarget; |
| const char* pStart; |
| |
| /* read a few bytes */ |
| numRead=T_FileStream_read(in, start, sizeof(start)); |
| |
| *cp = ucnv_detectUnicodeSignature(start, numRead, signatureLength, error); |
| |
| /* unread the bytes beyond what was consumed for U+FEFF */ |
| T_FileStream_rewind(in); |
| if (*signatureLength > 0) { |
| numRead = T_FileStream_read(in, start, *signatureLength); |
| } |
| |
| if(*cp==NULL){ |
| *conv =NULL; |
| return FALSE; |
| } |
| |
| /* open the converter for the detected Unicode charset */ |
| *conv = ucnv_open(*cp,error); |
| |
| /* convert and ignore initial U+FEFF, and the buffer overflow */ |
| pTarget = target; |
| pStart = start; |
| ucnv_toUnicode(*conv, &pTarget, target+1, &pStart, start+*signatureLength, NULL, FALSE, error); |
| *signatureLength = (int32_t)(pStart - start); |
| if(*error==U_BUFFER_OVERFLOW_ERROR) { |
| *error=U_ZERO_ERROR; |
| } |
| |
| /* verify that we successfully read exactly U+FEFF */ |
| if(U_SUCCESS(*error) && (pTarget!=(target+1) || target[0]!=0xfeff)) { |
| *error=U_INTERNAL_PROGRAM_ERROR; |
| } |
| |
| |
| return TRUE; |
| } |
| static UBool ucbuf_isCPKnown(const char* cp){ |
| if(ucnv_compareNames("UTF-8",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("UTF-16BE",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("UTF-16LE",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("UTF-16",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("UTF-32",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("UTF-32BE",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("UTF-32LE",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("SCSU",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("BOCU-1",cp)==0){ |
| return TRUE; |
| } |
| if(ucnv_compareNames("UTF-7",cp)==0){ |
| return TRUE; |
| } |
| return FALSE; |
| } |
| |
| U_CAPI FileStream * U_EXPORT2 |
| ucbuf_autodetect(const char* fileName, const char** cp,UConverter** conv, int32_t* signatureLength,UErrorCode* error){ |
| FileStream* in=NULL; |
| if(error==NULL || U_FAILURE(*error)){ |
| return NULL; |
| } |
| if(conv==NULL || cp==NULL || fileName==NULL){ |
| *error = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| /* open the file */ |
| in= T_FileStream_open(fileName,"rb"); |
| |
| if(in == NULL){ |
| *error=U_FILE_ACCESS_ERROR; |
| return NULL; |
| } |
| |
| if(ucbuf_autodetect_fs(in,cp,conv,signatureLength,error)) { |
| return in; |
| } else { |
| ucnv_close(*conv); |
| *conv=NULL; |
| T_FileStream_close(in); |
| return NULL; |
| } |
| } |
| |
| /* fill the uchar buffer */ |
| static UCHARBUF* |
| ucbuf_fillucbuf( UCHARBUF* buf,UErrorCode* error){ |
| UChar* pTarget=NULL; |
| UChar* target=NULL; |
| const char* source=NULL; |
| char carr[MAX_IN_BUF] = {'\0'}; |
| char* cbuf = carr; |
| int32_t inputRead=0; |
| int32_t outputWritten=0; |
| int32_t offset=0; |
| const char* sourceLimit =NULL; |
| int32_t cbufSize=0; |
| pTarget = buf->buffer; |
| /* check if we arrived here without exhausting the buffer*/ |
| if(buf->currentPos<buf->bufLimit){ |
| offset = (int32_t)(buf->bufLimit-buf->currentPos); |
| memmove(buf->buffer,buf->currentPos,offset* sizeof(UChar)); |
| } |
| |
| #if DEBUG |
| memset(pTarget+offset,0xff,sizeof(UChar)*(MAX_IN_BUF-offset)); |
| #endif |
| if(buf->isBuffered){ |
| cbufSize = MAX_IN_BUF; |
| /* read the file */ |
| inputRead=T_FileStream_read(buf->in,cbuf,cbufSize-offset); |
| buf->remaining-=inputRead; |
| |
| }else{ |
| cbufSize = T_FileStream_size(buf->in); |
| cbuf = (char*)uprv_malloc(cbufSize); |
| inputRead= T_FileStream_read(buf->in,cbuf,cbufSize); |
| buf->remaining-=inputRead; |
| } |
| |
| /* just to be sure...*/ |
| if ( 0 == inputRead ) |
| buf->remaining = 0; |
| |
| target=pTarget; |
| /* convert the bytes */ |
| if(buf->conv){ |
| /* set the callback to stop */ |
| UConverterToUCallback toUOldAction ; |
| void* toUOldContext; |
| void* toUNewContext=NULL; |
| ucnv_setToUCallBack(buf->conv, |
| UCNV_TO_U_CALLBACK_STOP, |
| toUNewContext, |
| &toUOldAction, |
| (const void**)&toUOldContext, |
| error); |
| /* since state is saved in the converter we add offset to source*/ |
| target = pTarget+offset; |
| source = cbuf; |
| sourceLimit = source + inputRead; |
| ucnv_toUnicode(buf->conv,&target,target+(buf->bufCapacity-offset), |
| &source,sourceLimit,NULL, |
| (UBool)(buf->remaining==0),error); |
| |
| if(U_FAILURE(*error)){ |
| char context[CONTEXT_LEN]; |
| char preContext[CONTEXT_LEN]; |
| char postContext[CONTEXT_LEN]; |
| int8_t len = CONTEXT_LEN; |
| int32_t start=0; |
| int32_t stop =0; |
| int32_t pos =0; |
| /* use erro1 to preserve the error code */ |
| UErrorCode error1 =U_ZERO_ERROR; |
| |
| if( buf->showWarning==TRUE){ |
| fprintf(stderr,"\n###WARNING: Encountered abnormal bytes while" |
| " converting input stream to target encoding: %s\n", |
| u_errorName(*error)); |
| } |
| |
| |
| /* now get the context chars */ |
| ucnv_getInvalidChars(buf->conv,context,&len,&error1); |
| context[len]= 0 ; /* null terminate the buffer */ |
| |
| pos = (int32_t)(source - cbuf - len); |
| |
| /* for pre-context */ |
| start = (pos <=CONTEXT_LEN)? 0 : (pos - (CONTEXT_LEN-1)); |
| stop = pos-len; |
| |
| memcpy(preContext,cbuf+start,stop-start); |
| /* null terminate the buffer */ |
| preContext[stop-start] = 0; |
| |
| /* for post-context */ |
| start = pos+len; |
| stop = (int32_t)(((pos+CONTEXT_LEN)<= (sourceLimit-cbuf) )? (pos+(CONTEXT_LEN-1)) : (sourceLimit-cbuf)); |
| |
| memcpy(postContext,source,stop-start); |
| /* null terminate the buffer */ |
| postContext[stop-start] = 0; |
| |
| if(buf->showWarning ==TRUE){ |
| /* print out the context */ |
| fprintf(stderr,"\tPre-context: %s\n",preContext); |
| fprintf(stderr,"\tContext: %s\n",context); |
| fprintf(stderr,"\tPost-context: %s\n", postContext); |
| } |
| |
| /* reset the converter */ |
| ucnv_reset(buf->conv); |
| |
| /* set the call back to substitute |
| * and restart conversion |
| */ |
| ucnv_setToUCallBack(buf->conv, |
| UCNV_TO_U_CALLBACK_SUBSTITUTE, |
| toUNewContext, |
| &toUOldAction, |
| (const void**)&toUOldContext, |
| &error1); |
| |
| /* reset source and target start positions */ |
| target = pTarget+offset; |
| source = cbuf; |
| |
| /* re convert */ |
| ucnv_toUnicode(buf->conv,&target,target+(buf->bufCapacity-offset), |
| &source,sourceLimit,NULL, |
| (UBool)(buf->remaining==0),&error1); |
| |
| } |
| outputWritten = (int32_t)(target - pTarget); |
| |
| |
| #if DEBUG |
| { |
| int i; |
| target = pTarget; |
| for(i=0;i<numRead;i++){ |
| /* printf("%c", (char)(*target++));*/ |
| } |
| } |
| #endif |
| |
| }else{ |
| u_charsToUChars(cbuf,target+offset,inputRead); |
| outputWritten=((buf->remaining>cbufSize)? cbufSize:inputRead+offset); |
| } |
| buf->currentPos = pTarget; |
| buf->bufLimit=pTarget+outputWritten; |
| *buf->bufLimit=0; /*NUL terminate*/ |
| if(cbuf!=carr){ |
| uprv_free(cbuf); |
| } |
| return buf; |
| } |
| |
| |
| |
| /* get a UChar from the stream*/ |
| U_CAPI int32_t U_EXPORT2 |
| ucbuf_getc(UCHARBUF* buf,UErrorCode* error){ |
| if(error==NULL || U_FAILURE(*error)){ |
| return FALSE; |
| } |
| if(buf->currentPos>=buf->bufLimit){ |
| if(buf->remaining==0){ |
| return U_EOF; |
| } |
| buf=ucbuf_fillucbuf(buf,error); |
| if(U_FAILURE(*error)){ |
| return U_EOF; |
| } |
| } |
| |
| return *(buf->currentPos++); |
| } |
| |
| /* get a UChar32 from the stream*/ |
| U_CAPI int32_t U_EXPORT2 |
| ucbuf_getc32(UCHARBUF* buf,UErrorCode* error){ |
| int32_t retVal = (int32_t)U_EOF; |
| if(error==NULL || U_FAILURE(*error)){ |
| return FALSE; |
| } |
| if(buf->currentPos+1>=buf->bufLimit){ |
| if(buf->remaining==0){ |
| return U_EOF; |
| } |
| buf=ucbuf_fillucbuf(buf,error); |
| if(U_FAILURE(*error)){ |
| return U_EOF; |
| } |
| } |
| if(UTF_IS_LEAD(*(buf->currentPos))){ |
| retVal=UTF16_GET_PAIR_VALUE(*(buf->currentPos++),*(buf->currentPos++)); |
| }else{ |
| retVal = *(buf->currentPos++); |
| } |
| return retVal; |
| } |
| |
| /* u_unescapeAt() callback to return a UChar*/ |
| static UChar U_CALLCONV |
| _charAt(int32_t offset, void *context) { |
| return ((UCHARBUF*) context)->currentPos[offset]; |
| } |
| |
| /* getc and escape it */ |
| U_CAPI int32_t U_EXPORT2 |
| ucbuf_getcx32(UCHARBUF* buf,UErrorCode* error) { |
| int32_t length; |
| int32_t offset; |
| UChar32 c32,c1,c2; |
| if(error==NULL || U_FAILURE(*error)){ |
| return FALSE; |
| } |
| /* Fill the buffer if it is empty */ |
| if (buf->currentPos >=buf->bufLimit-2) { |
| ucbuf_fillucbuf(buf,error); |
| } |
| |
| /* Get the next character in the buffer */ |
| if (buf->currentPos < buf->bufLimit) { |
| c1 = *(buf->currentPos)++; |
| } else { |
| c1 = U_EOF; |
| } |
| |
| c2 = *(buf->currentPos); |
| |
| /* If it isn't a backslash, return it */ |
| if (c1 != 0x005C) { |
| return c1; |
| } |
| |
| /* Determine the amount of data in the buffer */ |
| length = (int32_t)(buf->bufLimit - buf->currentPos); |
| |
| /* The longest escape sequence is \Uhhhhhhhh; make sure |
| we have at least that many characters */ |
| if (length < 10) { |
| |
| /* fill the buffer */ |
| ucbuf_fillucbuf(buf,error); |
| length = (int32_t)(buf->bufLimit - buf->buffer); |
| } |
| |
| /* Process the escape */ |
| offset = 0; |
| c32 = u_unescapeAt(_charAt, &offset, length, (void*)buf); |
| |
| /* check if u_unescapeAt unescaped and converted |
| * to c32 or not |
| */ |
| if(c32==0xFFFFFFFF){ |
| if(buf->showWarning) { |
| char context[20]; |
| int32_t len = 20; |
| if(length < len) { |
| len = length; |
| } |
| context[len]= 0 ; /* null terminate the buffer */ |
| u_UCharsToChars( buf->currentPos, context, len); |
| fprintf(stderr,"Bad escape: [%c%s]...\n", (int)c1, context); |
| } |
| *error= U_ILLEGAL_ESCAPE_SEQUENCE; |
| return c1; |
| }else if(c32!=c2 || (c32==0x0075 && c2==0x0075 && c1==0x005C) /* for \u0075 c2=0x0075 and c32==0x0075*/){ |
| /* Update the current buffer position */ |
| buf->currentPos += offset; |
| }else{ |
| /* unescaping failed so we just return |
| * c1 and not consume the buffer |
| * this is useful for rules with escapes |
| * in resouce bundles |
| * eg: \' \\ \" |
| */ |
| return c1; |
| } |
| |
| return c32; |
| } |
| |
| U_CAPI UCHARBUF* U_EXPORT2 |
| ucbuf_open(const char* fileName,const char** cp,UBool showWarning, UBool buffered, UErrorCode* error){ |
| |
| FileStream* in = NULL; |
| int32_t fileSize=0; |
| const char* knownCp; |
| if(error==NULL || U_FAILURE(*error)){ |
| return NULL; |
| } |
| if(cp==NULL || fileName==NULL){ |
| *error = U_ILLEGAL_ARGUMENT_ERROR; |
| return FALSE; |
| } |
| if (!uprv_strcmp(fileName, "-")) { |
| in = T_FileStream_stdin(); |
| }else{ |
| in = T_FileStream_open(fileName, "rb"); |
| } |
| |
| if(in!=NULL){ |
| UCHARBUF* buf =(UCHARBUF*) uprv_malloc(sizeof(UCHARBUF)); |
| fileSize = T_FileStream_size(in); |
| if(buf == NULL){ |
| *error = U_MEMORY_ALLOCATION_ERROR; |
| T_FileStream_close(in); |
| return NULL; |
| } |
| buf->in=in; |
| buf->conv=NULL; |
| buf->showWarning = showWarning; |
| buf->isBuffered = buffered; |
| buf->signatureLength=0; |
| if(*cp==NULL || **cp=='\0'){ |
| /* don't have code page name... try to autodetect */ |
| ucbuf_autodetect_fs(in,cp,&buf->conv,&buf->signatureLength,error); |
| }else if(ucbuf_isCPKnown(*cp)){ |
| /* discard BOM */ |
| ucbuf_autodetect_fs(in,&knownCp,&buf->conv,&buf->signatureLength,error); |
| } |
| if(U_SUCCESS(*error) && buf->conv==NULL) { |
| buf->conv=ucnv_open(*cp,error); |
| } |
| if(U_FAILURE(*error)){ |
| ucnv_close(buf->conv); |
| uprv_free(buf); |
| T_FileStream_close(in); |
| return NULL; |
| } |
| |
| if((buf->conv==NULL) && (buf->showWarning==TRUE)){ |
| fprintf(stderr,"###WARNING: No converter defined. Using codepage of system.\n"); |
| } |
| buf->remaining=fileSize-buf->signatureLength; |
| if(buf->isBuffered){ |
| buf->bufCapacity=MAX_U_BUF; |
| }else{ |
| buf->bufCapacity=buf->remaining+buf->signatureLength+1/*for terminating nul*/; |
| } |
| buf->buffer=(UChar*) uprv_malloc(U_SIZEOF_UCHAR * buf->bufCapacity ); |
| if (buf->buffer == NULL) { |
| *error = U_MEMORY_ALLOCATION_ERROR; |
| ucnv_close(buf->conv); |
| uprv_free(buf); |
| T_FileStream_close(in); |
| return NULL; |
| } |
| buf->currentPos=buf->buffer; |
| buf->bufLimit=buf->buffer; |
| if(U_FAILURE(*error)){ |
| fprintf(stderr, "Could not open codepage [%s]: %s\n", *cp, u_errorName(*error)); |
| ucnv_close(buf->conv); |
| uprv_free(buf); |
| T_FileStream_close(in); |
| return NULL; |
| } |
| buf=ucbuf_fillucbuf(buf,error); |
| return buf; |
| } |
| *error =U_FILE_ACCESS_ERROR; |
| return NULL; |
| } |
| |
| |
| |
| /* TODO: this method will fail if at the |
| * begining of buffer and the uchar to unget |
| * is from the previous buffer. Need to implement |
| * system to take care of that situation. |
| */ |
| U_CAPI void U_EXPORT2 |
| ucbuf_ungetc(int32_t c,UCHARBUF* buf){ |
| /* decrement currentPos pointer |
| * if not at the begining of buffer |
| */ |
| UChar escaped[8] ={'\0'}; |
| int32_t len =0; |
| if(c > 0xFFFF){ |
| len = uprv_itou(escaped,8,c,16,8); |
| }else{ |
| len=uprv_itou(escaped,8,c,16,4); |
| } |
| if(buf->currentPos!=buf->buffer){ |
| if(*(buf->currentPos-1)==c){ |
| buf->currentPos--; |
| }else if(u_strncmp(buf->currentPos-len,escaped,len) == 0){ |
| while(--len>0){ |
| buf->currentPos--; |
| } |
| } |
| } |
| } |
| |
| /* frees the resources of UChar* buffer */ |
| static void |
| ucbuf_closebuf(UCHARBUF* buf){ |
| uprv_free(buf->buffer); |
| buf->buffer = NULL; |
| } |
| |
| /* close the buf and release resources*/ |
| U_CAPI void U_EXPORT2 |
| ucbuf_close(UCHARBUF* buf){ |
| if(buf!=NULL){ |
| if(buf->conv){ |
| ucnv_close(buf->conv); |
| } |
| T_FileStream_close(buf->in); |
| ucbuf_closebuf(buf); |
| uprv_free(buf); |
| } |
| } |
| |
| /* rewind the buf and file stream */ |
| U_CAPI void U_EXPORT2 |
| ucbuf_rewind(UCHARBUF* buf,UErrorCode* error){ |
| if(error==NULL || U_FAILURE(*error)){ |
| return; |
| } |
| if(buf){ |
| buf->currentPos=buf->buffer; |
| buf->bufLimit=buf->buffer; |
| T_FileStream_rewind(buf->in); |
| buf->remaining=T_FileStream_size(buf->in)-buf->signatureLength; |
| |
| ucnv_resetToUnicode(buf->conv); |
| if(buf->signatureLength>0) { |
| UChar target[1]={ 0 }; |
| UChar* pTarget; |
| char start[8]; |
| const char* pStart; |
| int32_t numRead; |
| |
| /* read the signature bytes */ |
| numRead=T_FileStream_read(buf->in, start, buf->signatureLength); |
| |
| /* convert and ignore initial U+FEFF, and the buffer overflow */ |
| pTarget = target; |
| pStart = start; |
| ucnv_toUnicode(buf->conv, &pTarget, target+1, &pStart, start+numRead, NULL, FALSE, error); |
| if(*error==U_BUFFER_OVERFLOW_ERROR) { |
| *error=U_ZERO_ERROR; |
| } |
| |
| /* verify that we successfully read exactly U+FEFF */ |
| if(U_SUCCESS(*error) && (numRead!=buf->signatureLength || pTarget!=(target+1) || target[0]!=0xfeff)) { |
| *error=U_INTERNAL_PROGRAM_ERROR; |
| } |
| } |
| } |
| } |
| |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucbuf_size(UCHARBUF* buf){ |
| if(buf){ |
| if(buf->isBuffered){ |
| return (T_FileStream_size(buf->in)-buf->signatureLength)/ucnv_getMinCharSize(buf->conv); |
| }else{ |
| return (int32_t)(buf->bufLimit - buf->buffer); |
| } |
| } |
| return 0; |
| } |
| |
| U_CAPI const UChar* U_EXPORT2 |
| ucbuf_getBuffer(UCHARBUF* buf,int32_t* len,UErrorCode* error){ |
| if(error==NULL || U_FAILURE(*error)){ |
| return NULL; |
| } |
| if(buf==NULL || len==NULL){ |
| *error = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| *len = (int32_t)(buf->bufLimit - buf->buffer); |
| return buf->buffer; |
| } |
| |
| U_CAPI const char* U_EXPORT2 |
| ucbuf_resolveFileName(const char* inputDir, const char* fileName, char* target, int32_t* len, UErrorCode* status){ |
| int32_t requiredLen = 0; |
| int32_t dirlen = 0; |
| int32_t filelen = 0; |
| if(status==NULL || U_FAILURE(*status)){ |
| return NULL; |
| } |
| |
| if(inputDir == NULL || fileName == NULL || len==NULL || (target==NULL && *len>0)){ |
| *status = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| |
| dirlen = (int32_t)uprv_strlen(inputDir); |
| filelen = (int32_t)uprv_strlen(fileName); |
| if(inputDir[dirlen-1] != U_FILE_SEP_CHAR) { |
| requiredLen = dirlen + filelen + 2; |
| if((*len < requiredLen) || target==NULL){ |
| *len = requiredLen; |
| *status = U_BUFFER_OVERFLOW_ERROR; |
| return NULL; |
| } |
| |
| target[0] = '\0'; |
| /* |
| * append the input dir to openFileName if the first char in |
| * filename is not file seperation char and the last char input directory is not '.'. |
| * This is to support : |
| * genrb -s. /home/icu/data |
| * genrb -s. icu/data |
| * The user cannot mix notations like |
| * genrb -s. /icu/data --- the absolute path specified. -s redundant |
| * user should use |
| * genrb -s. icu/data --- start from CWD and look in icu/data dir |
| */ |
| if( (fileName[0] != U_FILE_SEP_CHAR) && (inputDir[dirlen-1] !='.')){ |
| uprv_strcpy(target, inputDir); |
| target[dirlen] = U_FILE_SEP_CHAR; |
| } |
| target[dirlen + 1] = '\0'; |
| } else { |
| requiredLen = dirlen + filelen + 1; |
| if((*len < requiredLen) || target==NULL){ |
| *len = requiredLen; |
| *status = U_BUFFER_OVERFLOW_ERROR; |
| return NULL; |
| } |
| |
| uprv_strcpy(target, inputDir); |
| } |
| |
| uprv_strcat(target, fileName); |
| return target; |
| } |
| /* |
| * Unicode TR 13 says any of the below chars is |
| * a new line char in a readline function in addition |
| * to CR+LF combination which needs to be |
| * handled seperately |
| */ |
| static UBool ucbuf_isCharNewLine(UChar c){ |
| switch(c){ |
| case 0x000A: /* LF */ |
| case 0x000D: /* CR */ |
| case 0x000C: /* FF */ |
| case 0x0085: /* NEL */ |
| case 0x2028: /* LS */ |
| case 0x2029: /* PS */ |
| return TRUE; |
| default: |
| return FALSE; |
| } |
| } |
| |
| U_CAPI const UChar* U_EXPORT2 |
| ucbuf_readline(UCHARBUF* buf,int32_t* len,UErrorCode* err){ |
| UChar* temp = buf->currentPos; |
| UChar* savePos =NULL; |
| UChar c=0x0000; |
| if(buf->isBuffered){ |
| /* The input is buffered we have to do more |
| * for returning a pointer U_TRUNCATED_CHAR_FOUND |
| */ |
| for(;;){ |
| c = *temp++; |
| if(buf->remaining==0){ |
| return NULL; /* end of file is reached return NULL */ |
| } |
| if(temp>=buf->bufLimit && buf->currentPos == buf->buffer){ |
| *err= U_TRUNCATED_CHAR_FOUND; |
| return NULL; |
| }else{ |
| ucbuf_fillucbuf(buf,err); |
| if(U_FAILURE(*err)){ |
| return NULL; |
| } |
| } |
| /* |
| * Accoding to TR 13 readLine functions must interpret |
| * CR, CR+LF, LF, NEL, PS, LS or FF as line seperators |
| */ |
| /* Windows CR LF */ |
| if(c ==0x0d && temp+1<=buf->bufLimit && *(temp+1) == 0x0a ){ |
| *len = (int32_t)(temp++ - buf->currentPos); |
| savePos = buf->currentPos; |
| buf->currentPos = temp; |
| return savePos; |
| } |
| /* else */ |
| |
| if (temp>=buf->bufLimit|| ucbuf_isCharNewLine(c)){ /* Unipad inserts 2028 line separators! */ |
| *len = (int32_t)(temp - buf->currentPos); |
| savePos = buf->currentPos; |
| buf->currentPos = temp; |
| return savePos; |
| } |
| } |
| }else{ |
| /* we know that all input is read into the internal |
| * buffer so we can safely return pointers |
| */ |
| for(;;){ |
| c = *temp++; |
| |
| if(buf->currentPos==buf->bufLimit){ |
| return NULL; /* end of file is reached return NULL */ |
| } |
| /* Windows CR LF */ |
| if(c ==0x0d && temp+1<=buf->bufLimit && *(temp+1) == 0x0a ){ |
| *len = (int32_t)(temp++ - buf->currentPos); |
| savePos = buf->currentPos; |
| buf->currentPos = temp; |
| return savePos; |
| } |
| /* else */ |
| if (temp>=buf->bufLimit|| ucbuf_isCharNewLine(c)) { /* Unipad inserts 2028 line separators! */ |
| *len = (int32_t)(temp - buf->currentPos); |
| savePos = buf->currentPos; |
| buf->currentPos = temp; |
| return savePos; |
| } |
| } |
| } |
| /* not reached */ |
| /* A compiler warning will appear if all paths don't contain a return statement. */ |
| /* return NULL;*/ |
| } |
| #endif |
