Function cupsFileGetLine

cups/file.c:865–930

 */

size_t					/* O - Number of bytes on line or 0 on end of file */
cupsFileGetLine(cups_file_t *fp,	/* I - File to read from */
                char        *buf,	/* I - Buffer */
                size_t      buflen)	/* I - Size of buffer */
{
  int		ch;			/* Character from file */
  char		*ptr,			/* Current position in line buffer */
		*end;			/* End of line buffer */


 /*
  * Range check input...
  */

  DEBUG_printf(("2cupsFileGetLine(fp=%p, buf=%p, buflen=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST buflen));

  if (!fp || (fp->mode != 'r' && fp->mode != 's') || !buf || buflen < 3)
    return (0);

 /*
  * Now loop until we have a valid line...
  */

  for (ptr = buf, end = buf + buflen - 2; ptr < end ;)
  {
    if (fp->ptr >= fp->end)
      if (cups_fill(fp) <= 0)
        break;

    *ptr++ = ch = *(fp->ptr)++;
    fp->pos ++;

    if (ch == '\r')
    {
     /*
      * Check for CR LF...
      */

      if (fp->ptr >= fp->end)
	if (cups_fill(fp) <= 0)
          break;

      if (*(fp->ptr) == '\n')
      {
        *ptr++ = *(fp->ptr)++;
	fp->pos ++;
      }

      break;
    }
    else if (ch == '\n')
    {
     /*
      * Line feed ends a line...
      */

      break;
    }