view release on metacpan or  search on metacpan

src/Source/LibPNG/pngerror.c  view on Meta::CPAN

static PNG_FUNCTION(void /* PRIVATE */,
png_default_error,(png_const_structrp png_ptr, png_const_charp error_message),
   PNG_NORETURN)
{
#ifdef PNG_CONSOLE_IO_SUPPORTED
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
   /* Check on NULL only added in 1.5.4 */
   if (error_message != NULL && *error_message == PNG_LITERAL_SHARP)
   {
      /* Strip "#nnnn " from beginning of error message. */
      int offset;
      char error_number[16];
      for (offset = 0; offset<15; offset++)
      {
         error_number[offset] = error_message[offset + 1];
         if (error_message[offset] == ' ')
            break;
      }

      if ((offset > 1) && (offset < 15))
      {
         error_number[offset - 1] = '\0';
         fprintf(stderr, "libpng error no. %s: %s",
             error_number, error_message + offset + 1);
         fprintf(stderr, PNG_STRING_NEWLINE);
      }

      else
      {
         fprintf(stderr, "libpng error: %s, offset=%d",
             error_message, offset);
         fprintf(stderr, PNG_STRING_NEWLINE);
      }
   }
   else
#endif
   {
      fprintf(stderr, "libpng error: %s", error_message ? error_message :
         "undefined");
      fprintf(stderr, PNG_STRING_NEWLINE);
   }
#else
   PNG_UNUSED(error_message) /* Make compiler happy */
#endif
   png_longjmp(png_ptr, 1);
}

PNG_FUNCTION(void,PNGAPI
png_longjmp,(png_const_structrp png_ptr, int val),PNG_NORETURN)
{
#ifdef PNG_SETJMP_SUPPORTED
   if (png_ptr != NULL && png_ptr->longjmp_fn != NULL &&
       png_ptr->jmp_buf_ptr != NULL)
      png_ptr->longjmp_fn(*png_ptr->jmp_buf_ptr, val);
#else
   PNG_UNUSED(png_ptr)
   PNG_UNUSED(val)
#endif

   /* If control reaches this point, png_longjmp() must not return. The only
    * choice is to terminate the whole process (or maybe the thread); to do
    * this the ANSI-C abort() function is used unless a different method is 
    * implemented by overriding the default configuration setting for
    * PNG_ABORT().
    */
   PNG_ABORT();
}

#ifdef PNG_WARNINGS_SUPPORTED
/* This function is called when there is a warning, but the library thinks
 * it can continue anyway.  Replacement functions don't have to do anything
 * here if you don't want them to.  In the default configuration, png_ptr is
 * not used, but it is passed in case it may be useful.
 */
static void /* PRIVATE */
png_default_warning(png_const_structrp png_ptr, png_const_charp warning_message)
{
#ifdef PNG_CONSOLE_IO_SUPPORTED
#  ifdef PNG_ERROR_NUMBERS_SUPPORTED
   if (*warning_message == PNG_LITERAL_SHARP)
   {
      int offset;
      char warning_number[16];
      for (offset = 0; offset < 15; offset++)
      {
         warning_number[offset] = warning_message[offset + 1];
         if (warning_message[offset] == ' ')
            break;
      }

      if ((offset > 1) && (offset < 15))
      {
         warning_number[offset + 1] = '\0';
         fprintf(stderr, "libpng warning no. %s: %s",
             warning_number, warning_message + offset);
         fprintf(stderr, PNG_STRING_NEWLINE);
      }

      else
      {
         fprintf(stderr, "libpng warning: %s",
             warning_message);
         fprintf(stderr, PNG_STRING_NEWLINE);
      }
   }
   else
#  endif

   {
      fprintf(stderr, "libpng warning: %s", warning_message);
      fprintf(stderr, PNG_STRING_NEWLINE);
   }
#else
   PNG_UNUSED(warning_message) /* Make compiler happy */
#endif
   PNG_UNUSED(png_ptr) /* Make compiler happy */
}
#endif /* WARNINGS */

/* This function is called when the application wants to use another method
 * of handling errors and warnings.  Note that the error function MUST NOT