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plt-scheme  4.2.1
Defines | Functions | Variables
pngerror.c File Reference
#include "png.h"

Go to the source code of this file.

Defines

#define PNG_INTERNAL
#define isnonalpha(c)   ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97))

Functions

static void png_default_error PNGARG ((png_structp png_ptr, png_const_charp error_message))
static void png_default_warning PNGARG ((png_structp png_ptr, png_const_charp warning_message))
void PNGAPI png_error (png_structp png_ptr, png_const_charp error_message)
void PNGAPI png_warning (png_structp png_ptr, png_const_charp warning_message)
static void png_format_buffer (png_structp png_ptr, png_charp buffer, png_const_charp error_message)
void PNGAPI png_chunk_error (png_structp png_ptr, png_const_charp error_message)
void PNGAPI png_chunk_warning (png_structp png_ptr, png_const_charp warning_message)
static void png_default_error (png_structp png_ptr, png_const_charp error_message)
static void png_default_warning (png_structp png_ptr, png_const_charp warning_message)
void PNGAPI png_set_error_fn (png_structp png_ptr, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)
png_voidp PNGAPI png_get_error_ptr (png_structp png_ptr)
void PNGAPI png_set_strip_error_numbers (png_structp png_ptr, png_uint_32 strip_mode)

Variables

static PNG_CONST char png_digit [16]

Define Documentation

#define isnonalpha (   c)    ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97))

Definition at line 107 of file pngerror.c.

#define PNG_INTERNAL

Definition at line 16 of file pngerror.c.


Function Documentation

void PNGAPI png_chunk_error ( png_structp  png_ptr,
png_const_charp  error_message 
)

Definition at line 146 of file pngerror.c.

{
   char msg[18+64];
   png_format_buffer(png_ptr, msg, error_message);
   png_error(png_ptr, msg);
}

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void PNGAPI png_chunk_warning ( png_structp  png_ptr,
png_const_charp  warning_message 
)

Definition at line 154 of file pngerror.c.

{
   char msg[18+64];
   png_format_buffer(png_ptr, msg, warning_message);
   png_warning(png_ptr, msg);
}

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static void png_default_error ( png_structp  png_ptr,
png_const_charp  error_message 
) [static]

Definition at line 167 of file pngerror.c.

{
#ifndef PNG_NO_CONSOLE_IO
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
   if (*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\n", error_number,
          error_message+offset);
     }
     else
       fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
   }
   else
#endif
   fprintf(stderr, "libpng error: %s\n", error_message);
#else
   if (error_message)
     /* make compiler happy */ ;
#endif

#ifdef PNG_SETJMP_SUPPORTED
#  ifdef USE_FAR_KEYWORD
   {
      jmp_buf jmpbuf;
      png_memcpy(jmpbuf,png_ptr->jmpbuf,sizeof(jmp_buf));
      longjmp(jmpbuf, 1);
   }
#  else
   longjmp(png_ptr->jmpbuf, 1);
# endif
#else
   if (png_ptr)
     /* make compiler happy */ ;
   PNG_ABORT();
#endif
}

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static void png_default_warning ( png_structp  png_ptr,
png_const_charp  warning_message 
) [static]

Definition at line 221 of file pngerror.c.

{
#ifndef PNG_NO_CONSOLE_IO
#  ifdef PNG_ERROR_NUMBERS_SUPPORTED
   if (*warning_message == '#')
   {
     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\n", warning_number,
          warning_message+offset);
     }
     else
       fprintf(stderr, "libpng warning: %s\n", warning_message);
   }
   else
#  endif
     fprintf(stderr, "libpng warning: %s\n", warning_message);
#else
   if (warning_message)
     /* appease compiler */ ;
#endif
   if (png_ptr)
      return;
}

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void PNGAPI png_error ( png_structp  png_ptr,
png_const_charp  error_message 
)

Definition at line 32 of file pngerror.c.

{
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
   char msg[16];
   if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
   {
     int offset = 0;
     if (*error_message == '#')
     {
         for (offset=1; offset<15; offset++)
            if (*(error_message+offset) == ' ')
                break;
         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
         {
            int i;
            for (i=0; i<offset-1; i++)
               msg[i]=error_message[i+1];
            msg[i]='\0';
            error_message=msg;
         }
         else
            error_message+=offset;
     }
     else
     {
         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
         {
            msg[0]='0';        
            msg[1]='\0';
            error_message=msg;
         }
     }
   }
#endif
   if (png_ptr->error_fn != NULL)
      (*(png_ptr->error_fn))(png_ptr, error_message);

   /* if the following returns or doesn't exist, use the default function,
      which will not return */
   png_default_error(png_ptr, error_message);
}

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static void png_format_buffer ( png_structp  png_ptr,
png_charp  buffer,
png_const_charp  error_message 
) [static]

Definition at line 113 of file pngerror.c.

{
   int iout = 0, iin = 0;

   while (iin < 4)
   {
      int c = png_ptr->chunk_name[iin++];
      if (isnonalpha(c))
      {
         buffer[iout++] = '[';
         buffer[iout++] = png_digit[(c & 0xf0) >> 4];
         buffer[iout++] = png_digit[c & 0x0f];
         buffer[iout++] = ']';
      }
      else
      {
         buffer[iout++] = (png_byte)c;
      }
   }

   if (error_message == NULL)
      buffer[iout] = 0;
   else
   {
      buffer[iout++] = ':';
      buffer[iout++] = ' ';
      png_memcpy(buffer+iout, error_message, 64);
      buffer[iout+63] = 0;
   }
}

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Definition at line 275 of file pngerror.c.

{
   return ((png_voidp)png_ptr->error_ptr);
}
void PNGAPI png_set_error_fn ( png_structp  png_ptr,
png_voidp  error_ptr,
png_error_ptr  error_fn,
png_error_ptr  warning_fn 
)

Definition at line 261 of file pngerror.c.

{
   png_ptr->error_ptr = error_ptr;
   png_ptr->error_fn = error_fn;
   png_ptr->warning_fn = warning_fn;
}

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Definition at line 283 of file pngerror.c.

{
   if(png_ptr != NULL)
   {
     png_ptr->flags &=
       ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
   }
}
void PNGAPI png_warning ( png_structp  png_ptr,
png_const_charp  warning_message 
)

Definition at line 80 of file pngerror.c.

{
     int offset = 0;
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
   if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
#endif
   {
     if (*warning_message == '#')
     {
         for (offset=1; offset<15; offset++)
            if (*(warning_message+offset) == ' ')
                break;
     }
   }
   if (png_ptr->warning_fn != NULL)
      (*(png_ptr->warning_fn))(png_ptr,
         (png_const_charp)(warning_message+offset));
   else
      png_default_warning(png_ptr, (png_const_charp)(warning_message+offset));
}

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Variable Documentation

PNG_CONST char png_digit[16] [static]
Initial value:
 {
   '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E',
   'F' }

Definition at line 108 of file pngerror.c.