Fossil

    i++;
  }
  if( pTo ){
    blob_append(pTo, &pFrom->aData[pFrom->iCursor], i - pFrom->iCursor);
  }
  pFrom->iCursor = i;
}

/*
** Remove comment lines (starting with '#') from a blob pIn.
** Store the result in pOut.  It is ok for pIn and pOut to be the same blob.
**
** pOut must either be the same as pIn or else uninitialized.
*/
void blob_strip_comment_lines(Blob *pIn, Blob *pOut){
  char *z = pIn->aData;
  unsigned int i = 0;
  unsigned int n = pIn->nUsed;
  unsigned int lineStart = 0;
  int doCopy = 1;
  Blob temp;
  blob_zero(&temp);

  while( i<n ){
    if( i==lineStart && z[i]=='#' ){
      doCopy = 0;
    }
    if( z[i]=='\n' ){
      if( doCopy ) blob_append(&temp,&pIn->aData[lineStart], i - lineStart + 1);
      lineStart = i + 1;
      doCopy = 1;
    }
    i++;
  }
  /* Last line */
  if( doCopy ) blob_append(&temp, &pIn->aData[lineStart], i - lineStart);

  if( pOut==pIn ) blob_reset(pOut);
  *pOut = temp;
}

/*
** COMMAND: test-strip-comment-lines
**
** Usage: %fossil test-strip-comment-lines ?OPTIONS? INPUTFILE
**
** Read INPUTFILE and print it without comment lines (starting with '#').
**
** This is used to test and debug the blob_strip_comment_lines() routine.
**
** Options:
**   -y|--side-by-side    Show diff of INPUTFILE and output side-by-side
**   -W|--width N         Width of lines in side-by-side diff
*/
void test_strip_comment_lines_cmd(void){
  Blob f, h;   /* unitialized */
  Blob out;
  DiffConfig dCfg;
  int sbs = 0;
  const char *z;
  int w = 0;

  memset(&dCfg, 0, sizeof(dCfg));

  sbs = find_option("side-by-side","y",0)!=0;
  if( (z = find_option("width","W",1))!=0 && (w = atoi(z))>0 ){
    dCfg.wColumn = w;
  }  
  verify_all_options();
  if( g.argc!=3 ) usage("INPUTFILE");

  blob_read_from_file(&f, g.argv[2], ExtFILE);
  blob_strip_comment_lines(&f, &h);

  if ( !sbs ){
    blob_write_to_file(&h, "-");
  }else{
    blob_zero(&out);
    dCfg.nContext = -1;   /* whole content */
    dCfg.diffFlags = DIFF_SIDEBYSIDE | DIFF_CONTEXT_EX | DIFF_STRIP_EOLCR;
    diff_begin(&dCfg);
    text_diff(&f, &h, &out, &dCfg);
    blob_write_to_file(&out, "-");
    diff_end(&dCfg, 0);
  }
}

/*
** Ensure that the text in pBlob ends with '\n'
*/
void blob_add_final_newline(Blob *pBlob){
  if( pBlob->nUsed<=0 ) return;
  if( pBlob->aData[pBlob->nUsed-1]!='\n' ){

      blob_append(&versionedPathname, ".no-warn", -1);
      if( file_size(blob_str(&versionedPathname), ExtFILE)>=0 ){
        noWarn = 1;
      }
    }
    blob_reset(&versionedPathname);
    if( found ){
      blob_strip_comment_lines(&setting, &setting);
      blob_trim(&setting); /* Avoid non-obvious problems with line endings
                           ** on boolean properties */
      zVersionedSetting = fossil_strdup(blob_str(&setting));
    }
    blob_reset(&setting);
    /* Store result in cache, which can be the value or 0 if not found */
    cacheEntry = (struct _cacheEntry*)fossil_malloc(sizeof(struct _cacheEntry));