+++ /dev/null
-
-/* pngerror.c - stub functions for i/o and memory allocation
- *
- * Last changed in libpng 1.2.22 [October 13, 2007]
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2007 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * This file provides a location for all error handling. Users who
- * need special error handling are expected to write replacement functions
- * and use png_set_error_fn() to use those functions. See the instructions
- * at each function.
- */
-
-#define PNG_INTERNAL
-#include "png.h"
-
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-static void /* PRIVATE */
-png_default_error PNGARG((png_structp png_ptr,
- png_const_charp error_message));
-#ifndef PNG_NO_WARNINGS
-static void /* PRIVATE */
-png_default_warning PNGARG((png_structp png_ptr,
- png_const_charp warning_message));
-#endif /* PNG_NO_WARNINGS */
-
-/* This function is called whenever there is a fatal error. This function
- * should not be changed. If there is a need to handle errors differently,
- * you should supply a replacement error function and use png_set_error_fn()
- * to replace the error function at run-time.
- */
-#ifndef PNG_NO_ERROR_TEXT
-void PNGAPI
-png_error(png_structp png_ptr, png_const_charp error_message)
-{
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- char msg[16];
- if (png_ptr != NULL)
- {
- if (png_ptr->flags&
- (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
- {
- if (*error_message == '#')
- {
- int offset;
- 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 != NULL && png_ptr->error_fn != NULL)
- (*(png_ptr->error_fn))(png_ptr, error_message);
-
- /* If the custom handler doesn't exist, or if it returns,
- use the default handler, which will not return. */
- png_default_error(png_ptr, error_message);
-}
-#else
-void PNGAPI
-png_err(png_structp png_ptr)
-{
- if (png_ptr != NULL && png_ptr->error_fn != NULL)
- (*(png_ptr->error_fn))(png_ptr, '\0');
-
- /* If the custom handler doesn't exist, or if it returns,
- use the default handler, which will not return. */
- png_default_error(png_ptr, '\0');
-}
-#endif /* PNG_NO_ERROR_TEXT */
-
-#ifndef PNG_NO_WARNINGS
-/* This function is called whenever there is a non-fatal error. This function
- * should not be changed. If there is a need to handle warnings differently,
- * you should supply a replacement warning function and use
- * png_set_error_fn() to replace the warning function at run-time.
- */
-void PNGAPI
-png_warning(png_structp png_ptr, png_const_charp warning_message)
-{
- int offset = 0;
- if (png_ptr != NULL)
- {
-#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 != NULL && png_ptr->warning_fn != NULL)
- (*(png_ptr->warning_fn))(png_ptr, warning_message+offset);
- }
- else
- png_default_warning(png_ptr, warning_message+offset);
-}
-#endif /* PNG_NO_WARNINGS */
-
-
-/* These utilities are used internally to build an error message that relates
- * to the current chunk. The chunk name comes from png_ptr->chunk_name,
- * this is used to prefix the message. The message is limited in length
- * to 63 bytes, the name characters are output as hex digits wrapped in []
- * if the character is invalid.
- */
-#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
-static PNG_CONST char png_digit[16] = {
- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
- 'A', 'B', 'C', 'D', 'E', 'F'
-};
-
-#define PNG_MAX_ERROR_TEXT 64
-
-#if !defined(PNG_NO_WARNINGS) || !defined(PNG_NO_ERROR_TEXT)
-static void /* PRIVATE */
-png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
- error_message)
-{
- 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, PNG_MAX_ERROR_TEXT);
- buffer[iout+PNG_MAX_ERROR_TEXT-1] = '\0';
- }
-}
-
-#ifdef PNG_READ_SUPPORTED
-void PNGAPI
-png_chunk_error(png_structp png_ptr, png_const_charp error_message)
-{
- char msg[18+PNG_MAX_ERROR_TEXT];
- if (png_ptr == NULL)
- png_error(png_ptr, error_message);
- else
- {
- png_format_buffer(png_ptr, msg, error_message);
- png_error(png_ptr, msg);
- }
-}
-#endif /* PNG_READ_SUPPORTED */
-#endif /* !defined(PNG_NO_WARNINGS) || !defined(PNG_NO_ERROR_TEXT) */
-
-#ifndef PNG_NO_WARNINGS
-void PNGAPI
-png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
-{
- char msg[18+PNG_MAX_ERROR_TEXT];
- if (png_ptr == NULL)
- png_warning(png_ptr, warning_message);
- else
- {
- png_format_buffer(png_ptr, msg, warning_message);
- png_warning(png_ptr, msg);
- }
-}
-#endif /* PNG_NO_WARNINGS */
-
-
-/* This is the default error handling function. Note that replacements for
- * this function MUST NOT RETURN, or the program will likely crash. This
- * function is used by default, or if the program supplies NULL for the
- * error function pointer in png_set_error_fn().
- */
-static void /* PRIVATE */
-png_default_error(png_structp png_ptr, png_const_charp error_message)
-{
-#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);
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
- if (png_ptr)
- {
-# ifdef USE_FAR_KEYWORD
- {
- jmp_buf jmpbuf;
- png_memcpy(jmpbuf, png_ptr->jmpbuf, png_sizeof(jmp_buf));
- longjmp(jmpbuf, 1);
- }
-# else
- longjmp(png_ptr->jmpbuf, 1);
-# endif
- }
-#else
- PNG_ABORT();
-#endif
-#ifdef PNG_NO_CONSOLE_IO
- error_message = error_message; /* make compiler happy */
-#endif
-}
-
-#ifndef PNG_NO_WARNINGS
-/* 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_structp png_ptr, png_const_charp warning_message)
-{
-#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
- warning_message = warning_message; /* make compiler happy */
-#endif
- png_ptr = png_ptr; /* make compiler happy */
-}
-#endif /* PNG_NO_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
- * return to the calling routine or serious problems will occur. The return
- * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
- */
-void PNGAPI
-png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warning_fn)
-{
- if (png_ptr == NULL)
- return;
- png_ptr->error_ptr = error_ptr;
- png_ptr->error_fn = error_fn;
- png_ptr->warning_fn = warning_fn;
-}
-
-
-/* This function returns a pointer to the error_ptr associated with the user
- * functions. The application should free any memory associated with this
- * pointer before png_write_destroy and png_read_destroy are called.
- */
-png_voidp PNGAPI
-png_get_error_ptr(png_structp png_ptr)
-{
- if (png_ptr == NULL)
- return NULL;
- return ((png_voidp)png_ptr->error_ptr);
-}
-
-
-#ifdef PNG_ERROR_NUMBERS_SUPPORTED
-void PNGAPI
-png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
-{
- if(png_ptr != NULL)
- {
- png_ptr->flags &=
- ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
- }
-}
-#endif
-#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
projects / opencv / blobdiff