The Tor Browser: intl/icu/source/tools/toolutil/ucbuf.c@6474c204b198 (annotated)

intl/icu/source/tools/toolutil/ucbuf.c@6474c204b198 (annotated)

intl/icu/source/tools/toolutil/ucbuf.c

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
 *******************************************************************************
 *
 *   Copyright (C) 1998-2011, 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/uchar.h"
 #include "unicode/ucnv.h"
 #include "unicode/ucnv_err.h"
 #include "unicode/ustring.h"
 #include "unicode/utf16.h"
 #include "filestrm.h"
 #include "cstring.h"
 #include "cmemory.h"
 #include "ustrfmt.h"
 #include "ucbuf.h"
 #include <stdio.h>
 #if !UCONFIG_NO_CONVERSION
 #define MAX_IN_BUF 1000
 #define MAX_U_BUF 1500
 #define CONTEXT_LEN 20
 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) {
         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);
         if (cbuf == NULL) {
         	*error = U_MEMORY_ALLOCATION_ERROR;
         	return NULL;
         }
         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+1];
             char preContext[CONTEXT_LEN+1];
             char postContext[CONTEXT_LEN+1];
             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(U16_IS_LEAD(*(buf->currentPos))){
         retVal=U16_GET_SUPPLEMENTARY(buf->currentPos[0],buf->currentPos[1]);
         buf->currentPos+=2;
     }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[CONTEXT_LEN+1];
             int32_t len = CONTEXT_LEN;
             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;
             ucbuf_close(buf);
             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));
             ucbuf_close(buf);
             return NULL;
         }
         ucbuf_fillucbuf(buf,error);
         if(U_FAILURE(*error)){
             ucbuf_close(buf);
             return NULL;
         }
         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
      */
     if(buf->currentPos!=buf->buffer){
         if(*(buf->currentPos-1)==c){
             buf->currentPos--;
         } else {
             /* ungetc failed - did not match. */
         }
     } else {
        /* ungetc failed - beginning of buffer. */
     }
 }
 /* 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

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intl/icu/source/tools/toolutil/ucbuf.c@6474c204b198 (annotated)

intl/icu/source/tools/toolutil/ucbuf.c