text: /*
   * snprintf functions for CUPS.
   *
   * Copyright 2007-2013 by Apple Inc.
   * Copyright 1997-2007 by Easy Software Products.
   *
   * Licensed under Apache License v2.0.  See the file "LICENSE" for more information.
   */
  
  /*
   * Include necessary headers...
   */
  
  #include "string-private.h"
  
  
  #ifndef HAVE_VSNPRINTF
  /*
   * '_cups_vsnprintf()' - Format a string into a fixed size buffer.
   */
  
  int					/* O - Number of bytes formatted */
  _cups_vsnprintf(char       *buffer,	/* O - Output buffer */
                  size_t     bufsize,	/* O - Size of output buffer */
  	        const char *format,	/* I - printf-style format string */
  	        va_list    ap)		/* I - Pointer to additional arguments */
  {
    char		*bufptr,		/* Pointer to position in buffer */
  		*bufend,		/* Pointer to end of buffer */
  		sign,			/* Sign of format width */
  		size,			/* Size character (h, l, L) */
  		type;			/* Format type character */
    int		width,			/* Width of field */
  		prec;			/* Number of characters of precision */
    char		tformat[100],		/* Temporary format string for sprintf() */
  		*tptr,			/* Pointer into temporary format */
  		temp[1024];		/* Buffer for formatted numbers */
    size_t	templen;		/* Length of "temp" */
    char		*s;			/* Pointer to string */
    int		slen;			/* Length of string */
    int		bytes;			/* Total number of bytes needed */
  
  
   /*
    * Loop through the format string, formatting as needed...
    */
  
    bufptr = buffer;
    bufend = buffer + bufsize - 1;
    bytes  = 0;
  
    while (*format)
    {
      if (*format == '%')
      {
        tptr = tformat;
        *tptr++ = *format++;
  
        if (*format == '%')
        {
          if (bufptr && bufptr < bufend) *bufptr++ = *format;
          bytes ++;
          format ++;
  	continue;
        }
        else if (strchr(" -+#\'", *format))
        {
          *tptr++ = *format;
          sign = *format++;
        }
        else
          sign = 0;
  
        if (*format == '*')
        {
         /*
          * Get width from argument...
  	*/
  
  	format ++;
  	width = va_arg(ap, int);
  
  	snprintf(tptr, sizeof(tformat) - (tptr - tformat), "%d", width);
  	tptr += strlen(tptr);
        }
        else
        {
  	width = 0;
  
  	while (isdigit(*format & 255))
  	{
  	  if (tptr < (tformat + sizeof(tformat) - 1))
  	    *tptr++ = *format;
  
  	  width = width * 10 + *format++ - '0';
  	}
        }
  
        if (*format == '.')
        {
  	if (tptr < (tformat + sizeof(tformat) - 1))
  	  *tptr++ = *format;
  
          format ++;
  
          if (*format == '*')
  	{
           /*
  	  * Get precision from argument...
  	  */
  
  	  format ++;
  	  prec = va_arg(ap, int);
  
  	  snprintf(tptr, sizeof(tformat) - (tptr - tformat), "%d", prec);
  	  tptr += strlen(tptr);
  	}
  	else
  	{
  	  prec = 0;
  
  	  while (isdigit(*format & 255))
  	  {
  	    if (tptr < (tformat + sizeof(tformat) - 1))
  	      *tptr++ = *format;
  
  	    prec = prec * 10 + *format++ - '0';
  	  }
  	}
        }
        else
          prec = -1;
  
        if (*format == 'l' && format[1] == 'l')
        {
          size = 'L';
  
  	if (tptr < (tformat + sizeof(tformat) - 2))
  	{
  	  *tptr++ = 'l';
  	  *tptr++ = 'l';
  	}
  
  	format += 2;
        }
        else if (*format == 'h' || *format == 'l' || *format == 'L')
        {
  	if (tptr < (tformat + sizeof(tformat) - 1))
  	  *tptr++ = *format;
  
          size = *format++;
        }
  
        if (!*format)
          break;
  
        if (tptr < (tformat + sizeof(tformat) - 1))
          *tptr++ = *format;
  
        type  = *format++;
        *tptr = '\0';
  
        switch (type)
        {
  	case 'E' : /* Floating point formats */
  	case 'G' :
  	case 'e' :
  	case 'f' :
  	case 'g' :
  	    if ((width + 2) > sizeof(temp))
  	      break;
  
  	    sprintf(temp, tformat, va_arg(ap, double));
  	    templen = strlen(temp):
  
              bytes += (int)templen;
  
              if (bufptr)
  	    {
  	      if ((bufptr + templen) > bufend)
  	      {
  		strlcpy(bufptr, temp, (size_t)(bufend - bufptr));
  		bufptr = bufend;
  	      }
  	      else
  	      {
  		memcpy(bufptr, temp, templen + 1);
  		bufptr += templen;
  	      }
  	    }
  	    break;
  
          case 'B' : /* Integer formats */
  	case 'X' :
  	case 'b' :
          case 'd' :
  	case 'i' :
  	case 'o' :
  	case 'u' :
  	case 'x' :
  	    if ((width + 2) > sizeof(temp))
  	      break;
  
  	    sprintf(temp, tformat, va_arg(ap, int));
  	    templen = strlen(temp):
  
              bytes += (int)templen;
  
  	    if (bufptr)
  	    {
  	      if ((bufptr + templen) > bufend)
  	      {
  		strlcpy(bufptr, temp, (size_t)(bufend - bufptr));
  		bufptr = bufend;
  	      }
  	      else
  	      {
  		memcpy(bufptr, temp, templen + 1);
  		bufptr += templen;
  	      }
  	    }
  	    break;
  
  	case 'p' : /* Pointer value */
  	    if ((width + 2) > sizeof(temp))
  	      break;
  
  	    sprintf(temp, tformat, va_arg(ap, void *));
  	    templen = strlen(temp):
  
              bytes += (int)templen;
  
  	    if (bufptr)
  	    {
  	      if ((bufptr + templen) > bufend)
  	      {
  		strlcpy(bufptr, temp, (size_t)(bufend - bufptr));
  		bufptr = bufend;
  	      }
  	      else
  	      {
  		memcpy(bufptr, temp, templen + 1);
  		bufptr += templen;
  	      }
  	    }
  	    break;
  
          case 'c' : /* Character or character array */
  	    bytes += width;
  
  	    if (bufptr)
  	    {
  	      if (width <= 1)
  	        *bufptr++ = va_arg(ap, int);
  	      else
  	      {
  		if ((bufptr + width) > bufend)
  		  width = (int)(bufend - bufptr);
  
  		memcpy(bufptr, va_arg(ap, char *), (size_t)width);
  		bufptr += width;
  	      }
  	    }
  	    break;
  
  	case 's' : /* String */
  	    if ((s = va_arg(ap, char *)) == NULL)
  	      s = "(null)";
  
  	    slen = (int)strlen(s);
  	    if (slen > width && prec != width)
  	      width = slen;
  
              bytes += width;
  
  	    if (bufptr)
  	    {
  	      if ((bufptr + width) > bufend)
  	        width = (int)(bufend - bufptr);
  
                if (slen > width)
  	        slen = width;
  
  	      if (sign == '-')
  	      {
  		memcpy(bufptr, s, (size_t)slen);
  		memset(bufptr + slen, ' ', (size_t)(width - slen));
  	      }
  	      else
  	      {
  		memset(bufptr, ' ', (size_t)(width - slen));
  		memcpy(bufptr + width - slen, s, (size_t)slen);
  	      }
  
  	      bufptr += width;
  	    }
  	    break;
  
  	case 'n' : /* Output number of chars so far */
  	    *(va_arg(ap, int *)) = bytes;
  	    break;
        }
      }
      else
      {
        bytes ++;
  
        if (bufptr && bufptr < bufend)
          *bufptr++ = *format;
  
        format ++;
      }
    }
  
   /*
    * Nul-terminate the string and return the number of characters needed.
    */
  
    *bufptr = '\0';
  
    return (bytes);
  }
  #endif /* !HAVE_VSNPRINT */
  
  
  #ifndef HAVE_SNPRINTF
  /*
   * '_cups_snprintf()' - Format a string into a fixed size buffer.
   */
  
  int					/* O - Number of bytes formatted */
  _cups_snprintf(char       *buffer,	/* O - Output buffer */
                 size_t     bufsize,	/* O - Size of output buffer */
                 const char *format,	/* I - printf-style format string */
  	       ...)			/* I - Additional arguments as needed */
  {
    int		bytes;			/* Number of bytes formatted */
    va_list 	ap;			/* Pointer to additional arguments */
  
  
    va_start(ap, format);
    bytes = vsnprintf(buffer, bufsize, format, ap);
    va_end(ap);
  
    return (bytes);
  }
  #endif /* !HAVE_SNPRINTF */
  