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set svn:eol-type=native for **.c

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@1439 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
bushing
2008-12-08 04:58:11 +00:00
parent 30c883bcfc
commit 18ceeda47a
41 changed files with 40592 additions and 40592 deletions
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Externals/wxWidgets/src/common/extended.c
Vendored
+196 -196
View File
@@ -1,196 +1,196 @@
/*****************************************************************************
** Name: extended.c
** Purpose: IEEE Extended<->Double routines to save floats to file
** Maintainer: Ryan Norton
** Modified by:
** Created: 11/24/04
** RCS-ID: $Id: extended.c 36952 2006-01-18 10:25:04Z JS $
*****************************************************************************/
#if defined(_WIN32_WCE)
/* eVC cause warnings in its own headers: stdlib.h and winnt.h */
#pragma warning (disable:4115)
#pragma warning (disable:4214)
#endif
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
#include <string.h>
#include "wx/defs.h"
#if defined(_WIN32_WCE)
#pragma warning (default:4115)
#pragma warning (default:4214)
#endif
#if wxUSE_APPLE_IEEE
#include "wx/math.h"
/* Copyright (C) 1989-1991 Ken Turkowski. <[email protected]>
*
* All rights reserved.
*
* Warranty Information
* Even though I have reviewed this software, I make no warranty
* or representation, either express or implied, with respect to this
* software, its quality, accuracy, merchantability, or fitness for a
* particular purpose. As a result, this software is provided "as is,"
* and you, its user, are assuming the entire risk as to its quality
* and accuracy.
*
* This code may be used and freely distributed as long as it includes
* this copyright notice and the above warranty information.
*
* Machine-independent I/O routines for IEEE floating-point numbers.
*
* NaN's and infinities are converted to HUGE_VAL or HUGE, which
* happens to be infinity on IEEE machines. Unfortunately, it is
* impossible to preserve NaN's in a machine-independent way.
* Infinities are, however, preserved on IEEE machines.
*
* These routines have been tested on the following machines:
* Apple Macintosh, MPW 3.1 C compiler
* Apple Macintosh, THINK C compiler
* Silicon Graphics IRIS, MIPS compiler
* Cray X/MP and Y/MP
* Digital Equipment VAX
* Sequent Balance (Multiprocesor 386)
* NeXT
*
*
* Implemented by Malcolm Slaney and Ken Turkowski.
*
* Malcolm Slaney contributions during 1988-1990 include big- and little-
* endian file I/O, conversion to and from Motorola's extended 80-bit
* floating-point format, and conversions to and from IEEE single-
* precision floating-point format.
*
* In 1991, Ken Turkowski implemented the conversions to and from
* IEEE double-precision format, added more precision to the extended
* conversions, and accommodated conversions involving +/- infinity,
* NaN's, and denormalized numbers.
*/
#ifndef HUGE_VAL
# define HUGE_VAL HUGE
#endif /*HUGE_VAL*/
/****************************************************************
* The following two routines make up for deficiencies in many
* compilers to convert properly between unsigned integers and
* floating-point. Some compilers which have this bug are the
* THINK_C compiler for the Macintosh and the C compiler for the
* Silicon Graphics MIPS-based Iris.
****************************************************************/
#ifdef applec /* The Apple C compiler works */
# define FloatToUnsigned(f) ((wxUint32)(f))
# define UnsignedToFloat(u) ((wxFloat64)(u))
#else /*applec*/
# define FloatToUnsigned(f) ((wxUint32)(((wxInt32)((f) - 2147483648.0)) + 2147483647L) + 1)
# define UnsignedToFloat(u) (((wxFloat64)((wxInt32)((u) - 2147483647L - 1))) + 2147483648.0)
#endif /*applec*/
/****************************************************************
* Extended precision IEEE floating-point conversion routines.
* Extended is an 80-bit number as defined by Motorola,
* with a sign bit, 15 bits of exponent (offset 16383?),
* and a 64-bit mantissa, with no hidden bit.
****************************************************************/
wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes)
{
wxFloat64 f;
wxInt32 expon;
wxUint32 hiMant, loMant;
expon = ((bytes[0] & 0x7F) << 8) | (bytes[1] & 0xFF);
hiMant = ((wxUint32)(bytes[2] & 0xFF) << 24)
| ((wxUint32)(bytes[3] & 0xFF) << 16)
| ((wxUint32)(bytes[4] & 0xFF) << 8)
| ((wxUint32)(bytes[5] & 0xFF));
loMant = ((wxUint32)(bytes[6] & 0xFF) << 24)
| ((wxUint32)(bytes[7] & 0xFF) << 16)
| ((wxUint32)(bytes[8] & 0xFF) << 8)
| ((wxUint32)(bytes[9] & 0xFF));
if (expon == 0 && hiMant == 0 && loMant == 0) {
f = 0;
}
else {
if (expon == 0x7FFF) { /* Infinity or NaN */
f = HUGE_VAL;
}
else {
expon -= 16383;
f = ldexp(UnsignedToFloat(hiMant), expon-=31);
f += ldexp(UnsignedToFloat(loMant), expon-=32);
}
}
if (bytes[0] & 0x80)
return -f;
else
return f;
}
/****************************************************************/
void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes)
{
wxInt32 sign;
wxInt32 expon;
wxFloat64 fMant, fsMant;
wxUint32 hiMant, loMant;
if (num < 0) {
sign = 0x8000;
num *= -1;
} else {
sign = 0;
}
if (num == 0) {
expon = 0; hiMant = 0; loMant = 0;
}
else {
fMant = frexp(num, &expon);
if ((expon > 16384) || !(fMant < 1)) { /* Infinity or NaN */
expon = sign|0x7FFF; hiMant = 0; loMant = 0; /* infinity */
}
else { /* Finite */
expon += 16382;
if (expon < 0) { /* denormalized */
fMant = ldexp(fMant, expon);
expon = 0;
}
expon |= sign;
fMant = ldexp(fMant, 32); fsMant = floor(fMant); hiMant = FloatToUnsigned(fsMant);
fMant = ldexp(fMant - fsMant, 32); fsMant = floor(fMant); loMant = FloatToUnsigned(fsMant);
}
}
bytes[0] = expon >> 8;
bytes[1] = expon;
bytes[2] = hiMant >> 24;
bytes[3] = hiMant >> 16;
bytes[4] = hiMant >> 8;
bytes[5] = hiMant;
bytes[6] = loMant >> 24;
bytes[7] = loMant >> 16;
bytes[8] = loMant >> 8;
bytes[9] = loMant;
}
#endif /* wxUSE_APPLE_IEEE */
/*****************************************************************************
** Name: extended.c
** Purpose: IEEE Extended<->Double routines to save floats to file
** Maintainer: Ryan Norton
** Modified by:
** Created: 11/24/04
** RCS-ID: $Id: extended.c 36952 2006-01-18 10:25:04Z JS $
*****************************************************************************/
#if defined(_WIN32_WCE)
/* eVC cause warnings in its own headers: stdlib.h and winnt.h */
#pragma warning (disable:4115)
#pragma warning (disable:4214)
#endif
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <limits.h>
#include <string.h>
#include "wx/defs.h"
#if defined(_WIN32_WCE)
#pragma warning (default:4115)
#pragma warning (default:4214)
#endif
#if wxUSE_APPLE_IEEE
#include "wx/math.h"
/* Copyright (C) 1989-1991 Ken Turkowski. <[email protected]>
*
* All rights reserved.
*
* Warranty Information
* Even though I have reviewed this software, I make no warranty
* or representation, either express or implied, with respect to this
* software, its quality, accuracy, merchantability, or fitness for a
* particular purpose. As a result, this software is provided "as is,"
* and you, its user, are assuming the entire risk as to its quality
* and accuracy.
*
* This code may be used and freely distributed as long as it includes
* this copyright notice and the above warranty information.
*
* Machine-independent I/O routines for IEEE floating-point numbers.
*
* NaN's and infinities are converted to HUGE_VAL or HUGE, which
* happens to be infinity on IEEE machines. Unfortunately, it is
* impossible to preserve NaN's in a machine-independent way.
* Infinities are, however, preserved on IEEE machines.
*
* These routines have been tested on the following machines:
* Apple Macintosh, MPW 3.1 C compiler
* Apple Macintosh, THINK C compiler
* Silicon Graphics IRIS, MIPS compiler
* Cray X/MP and Y/MP
* Digital Equipment VAX
* Sequent Balance (Multiprocesor 386)
* NeXT
*
*
* Implemented by Malcolm Slaney and Ken Turkowski.
*
* Malcolm Slaney contributions during 1988-1990 include big- and little-
* endian file I/O, conversion to and from Motorola's extended 80-bit
* floating-point format, and conversions to and from IEEE single-
* precision floating-point format.
*
* In 1991, Ken Turkowski implemented the conversions to and from
* IEEE double-precision format, added more precision to the extended
* conversions, and accommodated conversions involving +/- infinity,
* NaN's, and denormalized numbers.
*/
#ifndef HUGE_VAL
# define HUGE_VAL HUGE
#endif /*HUGE_VAL*/
/****************************************************************
* The following two routines make up for deficiencies in many
* compilers to convert properly between unsigned integers and
* floating-point. Some compilers which have this bug are the
* THINK_C compiler for the Macintosh and the C compiler for the
* Silicon Graphics MIPS-based Iris.
****************************************************************/
#ifdef applec /* The Apple C compiler works */
# define FloatToUnsigned(f) ((wxUint32)(f))
# define UnsignedToFloat(u) ((wxFloat64)(u))
#else /*applec*/
# define FloatToUnsigned(f) ((wxUint32)(((wxInt32)((f) - 2147483648.0)) + 2147483647L) + 1)
# define UnsignedToFloat(u) (((wxFloat64)((wxInt32)((u) - 2147483647L - 1))) + 2147483648.0)
#endif /*applec*/
/****************************************************************
* Extended precision IEEE floating-point conversion routines.
* Extended is an 80-bit number as defined by Motorola,
* with a sign bit, 15 bits of exponent (offset 16383?),
* and a 64-bit mantissa, with no hidden bit.
****************************************************************/
wxFloat64 ConvertFromIeeeExtended(const wxInt8 *bytes)
{
wxFloat64 f;
wxInt32 expon;
wxUint32 hiMant, loMant;
expon = ((bytes[0] & 0x7F) << 8) | (bytes[1] & 0xFF);
hiMant = ((wxUint32)(bytes[2] & 0xFF) << 24)
| ((wxUint32)(bytes[3] & 0xFF) << 16)
| ((wxUint32)(bytes[4] & 0xFF) << 8)
| ((wxUint32)(bytes[5] & 0xFF));
loMant = ((wxUint32)(bytes[6] & 0xFF) << 24)
| ((wxUint32)(bytes[7] & 0xFF) << 16)
| ((wxUint32)(bytes[8] & 0xFF) << 8)
| ((wxUint32)(bytes[9] & 0xFF));
if (expon == 0 && hiMant == 0 && loMant == 0) {
f = 0;
}
else {
if (expon == 0x7FFF) { /* Infinity or NaN */
f = HUGE_VAL;
}
else {
expon -= 16383;
f = ldexp(UnsignedToFloat(hiMant), expon-=31);
f += ldexp(UnsignedToFloat(loMant), expon-=32);
}
}
if (bytes[0] & 0x80)
return -f;
else
return f;
}
/****************************************************************/
void ConvertToIeeeExtended(wxFloat64 num, wxInt8 *bytes)
{
wxInt32 sign;
wxInt32 expon;
wxFloat64 fMant, fsMant;
wxUint32 hiMant, loMant;
if (num < 0) {
sign = 0x8000;
num *= -1;
} else {
sign = 0;
}
if (num == 0) {
expon = 0; hiMant = 0; loMant = 0;
}
else {
fMant = frexp(num, &expon);
if ((expon > 16384) || !(fMant < 1)) { /* Infinity or NaN */
expon = sign|0x7FFF; hiMant = 0; loMant = 0; /* infinity */
}
else { /* Finite */
expon += 16382;
if (expon < 0) { /* denormalized */
fMant = ldexp(fMant, expon);
expon = 0;
}
expon |= sign;
fMant = ldexp(fMant, 32); fsMant = floor(fMant); hiMant = FloatToUnsigned(fsMant);
fMant = ldexp(fMant - fsMant, 32); fsMant = floor(fMant); loMant = FloatToUnsigned(fsMant);
}
}
bytes[0] = expon >> 8;
bytes[1] = expon;
bytes[2] = hiMant >> 24;
bytes[3] = hiMant >> 16;
bytes[4] = hiMant >> 8;
bytes[5] = hiMant;
bytes[6] = loMant >> 24;
bytes[7] = loMant >> 16;
bytes[8] = loMant >> 8;
bytes[9] = loMant;
}
#endif /* wxUSE_APPLE_IEEE */
Externals/wxWidgets/src/msw/winestub.c
Vendored
+45 -45
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@@ -1,45 +1,45 @@
/****************************************************************************
* Name: winestub.cpp
* Purpose: wxWINE module mapping main() to WinMain()
* Author: Robert Roebling
* Created: 04/01/98
* RCS-ID: $Id: winestub.c 29038 2004-09-07 11:11:05Z ABX $
* Copyright: (c) Robert Roebling
* Licence: wxWidgets Licence
*****************************************************************************/
#include <string.h>
#include "winuser.h"
#include "xmalloc.h"
extern int PASCAL WinMain( HINSTANCE, HINSTANCE, LPSTR, int );
extern HINSTANCE MAIN_WinelibInit( int *argc, char *argv[] );
/* Most Windows C/C++ compilers use something like this to */
/* access argc and argv globally: */
int _ARGC;
char **_ARGV;
int main( int argc, char *argv [] )
{
HINSTANCE hInstance;
LPSTR lpszCmdParam;
int i, len = 0;
_ARGC = argc;
_ARGV = (char **)argv;
if (!(hInstance = MAIN_WinelibInit( &argc, argv ))) return 0;
/* Alloc szCmdParam */
for (i = 1; i < argc; i++) len += strlen(argv[i]) + 1;
lpszCmdParam = (LPSTR) xmalloc(len + 1);
/* Concatenate arguments */
if (argc > 1) strcpy(lpszCmdParam, argv[1]);
else lpszCmdParam[0] = '\0';
for (i = 2; i < argc; i++) strcat(strcat(lpszCmdParam, " "), argv[i]);
return WinMain (hInstance, /* hInstance */
0, /* hPrevInstance */
lpszCmdParam, /* lpszCmdParam */
SW_NORMAL); /* nCmdShow */
}
/****************************************************************************
* Name: winestub.cpp
* Purpose: wxWINE module mapping main() to WinMain()
* Author: Robert Roebling
* Created: 04/01/98
* RCS-ID: $Id: winestub.c 29038 2004-09-07 11:11:05Z ABX $
* Copyright: (c) Robert Roebling
* Licence: wxWidgets Licence
*****************************************************************************/
#include <string.h>
#include "winuser.h"
#include "xmalloc.h"
extern int PASCAL WinMain( HINSTANCE, HINSTANCE, LPSTR, int );
extern HINSTANCE MAIN_WinelibInit( int *argc, char *argv[] );
/* Most Windows C/C++ compilers use something like this to */
/* access argc and argv globally: */
int _ARGC;
char **_ARGV;
int main( int argc, char *argv [] )
{
HINSTANCE hInstance;
LPSTR lpszCmdParam;
int i, len = 0;
_ARGC = argc;
_ARGV = (char **)argv;
if (!(hInstance = MAIN_WinelibInit( &argc, argv ))) return 0;
/* Alloc szCmdParam */
for (i = 1; i < argc; i++) len += strlen(argv[i]) + 1;
lpszCmdParam = (LPSTR) xmalloc(len + 1);
/* Concatenate arguments */
if (argc > 1) strcpy(lpszCmdParam, argv[1]);
else lpszCmdParam[0] = '\0';
for (i = 2; i < argc; i++) strcat(strcat(lpszCmdParam, " "), argv[i]);
return WinMain (hInstance, /* hInstance */
0, /* hPrevInstance */
lpszCmdParam, /* lpszCmdParam */
SW_NORMAL); /* nCmdShow */
}
Externals/wxWidgets/src/png/png.c
Vendored
+826 -826
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Externals/wxWidgets/src/png/pngerror.c
Vendored
+295 -295
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@@ -1,295 +1,295 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* libpng version 1.2.7 - September 12, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 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"
static void /* PRIVATE */
png_default_error PNGARG((png_structp png_ptr,
png_const_charp error_message));
static void /* PRIVATE */
png_default_warning PNGARG((png_structp png_ptr,
png_const_charp warning_message));
/* 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.
*/
void PNGAPI
png_error(png_structp png_ptr, png_const_charp error_message)
{
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
char msg[16];
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);
}
/* 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;
#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);
}
/* 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'
};
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_strncpy(buffer+iout, error_message, 63);
buffer[iout+63] = 0;
}
}
void PNGAPI
png_chunk_error(png_structp png_ptr, png_const_charp error_message)
{
char msg[18+64];
png_format_buffer(png_ptr, msg, error_message);
png_error(png_ptr, msg);
}
void PNGAPI
png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
{
char msg[18+64];
png_format_buffer(png_ptr, msg, warning_message);
png_warning(png_ptr, msg);
}
/* 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
# 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
/* make compiler happy */ ;
if (png_ptr)
PNG_ABORT();
#endif
#ifdef PNG_NO_CONSOLE_IO
/* make compiler happy */ ;
if (&error_message != NULL)
return;
#endif
}
/* 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
/* make compiler happy */ ;
if (warning_message)
return;
#endif
/* make compiler happy */ ;
if (png_ptr)
return;
}
/* 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)
{
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)
{
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
/* pngerror.c - stub functions for i/o and memory allocation
*
* libpng version 1.2.7 - September 12, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 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"
static void /* PRIVATE */
png_default_error PNGARG((png_structp png_ptr,
png_const_charp error_message));
static void /* PRIVATE */
png_default_warning PNGARG((png_structp png_ptr,
png_const_charp warning_message));
/* 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.
*/
void PNGAPI
png_error(png_structp png_ptr, png_const_charp error_message)
{
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
char msg[16];
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);
}
/* 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;
#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);
}
/* 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'
};
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_strncpy(buffer+iout, error_message, 63);
buffer[iout+63] = 0;
}
}
void PNGAPI
png_chunk_error(png_structp png_ptr, png_const_charp error_message)
{
char msg[18+64];
png_format_buffer(png_ptr, msg, error_message);
png_error(png_ptr, msg);
}
void PNGAPI
png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
{
char msg[18+64];
png_format_buffer(png_ptr, msg, warning_message);
png_warning(png_ptr, msg);
}
/* 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
# 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
/* make compiler happy */ ;
if (png_ptr)
PNG_ABORT();
#endif
#ifdef PNG_NO_CONSOLE_IO
/* make compiler happy */ ;
if (&error_message != NULL)
return;
#endif
}
/* 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
/* make compiler happy */ ;
if (warning_message)
return;
#endif
/* make compiler happy */ ;
if (png_ptr)
return;
}
/* 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)
{
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)
{
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
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/* pngrio.c - functions for data input
*
* libpng 1.2.7 - September 12, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 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 input. Users who need
* special handling are expected to write a function that has the same
* arguments as this and performs a similar function, but that possibly
* has a different input method. Note that you shouldn't change this
* function, but rather write a replacement function and then make
* libpng use it at run time with png_set_read_fn(...).
*/
#define PNG_INTERNAL
#include "png.h"
/* Read the data from whatever input you are using. The default routine
reads from a file pointer. Note that this routine sometimes gets called
with very small lengths, so you should implement some kind of simple
buffering if you are using unbuffered reads. This should never be asked
to read more then 64K on a 16 bit machine. */
void /* PRIVATE */
png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_debug1(4,"reading %d bytes\n", (int)length);
if (png_ptr->read_data_fn != NULL)
(*(png_ptr->read_data_fn))(png_ptr, data, length);
else
png_error(png_ptr, "Call to NULL read function");
}
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual reading of data. If you are
not reading from a standard C stream, you should create a replacement
read_data function and use it at run time with png_set_read_fn(), rather
than changing the library. */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_size_t check;
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
* instead of an int, which is what fread() actually returns.
*/
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = (png_size_t)fread(data, (png_size_t)1, length,
(png_FILE_p)png_ptr->io_ptr);
#endif
if (check != length)
png_error(png_ptr, "Read Error");
}
#else
/* this is the model-independent version. Since the standard I/O library
can't handle far buffers in the medium and small models, we have to copy
the data.
*/
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
static void /* PRIVATE */
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
int check;
png_byte *n_data;
png_FILE_p io_ptr;
/* Check if data really is near. If so, use usual code. */
n_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
if ((png_bytep)n_data == data)
{
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = fread(n_data, 1, length, io_ptr);
#endif
}
else
{
png_byte buf[NEAR_BUF_SIZE];
png_size_t read, remaining, err;
check = 0;
remaining = length;
do
{
read = MIN(NEAR_BUF_SIZE, remaining);
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(io_ptr), buf, read, &err, NULL) )
err = 0;
#else
err = fread(buf, (png_size_t)1, read, io_ptr);
#endif
png_memcpy(data, buf, read); /* copy far buffer to near buffer */
if(err != read)
break;
else
check += err;
data += read;
remaining -= read;
}
while (remaining != 0);
}
if ((png_uint_32)check != (png_uint_32)length)
png_error(png_ptr, "read Error");
}
#endif
#endif
/* This function allows the application to supply a new input function
for libpng if standard C streams aren't being used.
This function takes as its arguments:
png_ptr - pointer to a png input data structure
io_ptr - pointer to user supplied structure containing info about
the input functions. May be NULL.
read_data_fn - pointer to a new input function that takes as its
arguments a pointer to a png_struct, a pointer to
a location where input data can be stored, and a 32-bit
unsigned int that is the number of bytes to be read.
To exit and output any fatal error messages the new write
function should call png_error(png_ptr, "Error msg"). */
void PNGAPI
png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr read_data_fn)
{
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
if (read_data_fn != NULL)
png_ptr->read_data_fn = read_data_fn;
else
png_ptr->read_data_fn = png_default_read_data;
#else
png_ptr->read_data_fn = read_data_fn;
#endif
/* It is an error to write to a read device */
if (png_ptr->write_data_fn != NULL)
{
png_ptr->write_data_fn = NULL;
png_warning(png_ptr,
"It's an error to set both read_data_fn and write_data_fn in the ");
png_warning(png_ptr,
"same structure. Resetting write_data_fn to NULL.");
}
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
png_ptr->output_flush_fn = NULL;
#endif
}
/* pngrio.c - functions for data input
*
* libpng 1.2.7 - September 12, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 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 input. Users who need
* special handling are expected to write a function that has the same
* arguments as this and performs a similar function, but that possibly
* has a different input method. Note that you shouldn't change this
* function, but rather write a replacement function and then make
* libpng use it at run time with png_set_read_fn(...).
*/
#define PNG_INTERNAL
#include "png.h"
/* Read the data from whatever input you are using. The default routine
reads from a file pointer. Note that this routine sometimes gets called
with very small lengths, so you should implement some kind of simple
buffering if you are using unbuffered reads. This should never be asked
to read more then 64K on a 16 bit machine. */
void /* PRIVATE */
png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_debug1(4,"reading %d bytes\n", (int)length);
if (png_ptr->read_data_fn != NULL)
(*(png_ptr->read_data_fn))(png_ptr, data, length);
else
png_error(png_ptr, "Call to NULL read function");
}
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual reading of data. If you are
not reading from a standard C stream, you should create a replacement
read_data function and use it at run time with png_set_read_fn(), rather
than changing the library. */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_size_t check;
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
* instead of an int, which is what fread() actually returns.
*/
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = (png_size_t)fread(data, (png_size_t)1, length,
(png_FILE_p)png_ptr->io_ptr);
#endif
if (check != length)
png_error(png_ptr, "Read Error");
}
#else
/* this is the model-independent version. Since the standard I/O library
can't handle far buffers in the medium and small models, we have to copy
the data.
*/
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
static void /* PRIVATE */
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
int check;
png_byte *n_data;
png_FILE_p io_ptr;
/* Check if data really is near. If so, use usual code. */
n_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
if ((png_bytep)n_data == data)
{
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = fread(n_data, 1, length, io_ptr);
#endif
}
else
{
png_byte buf[NEAR_BUF_SIZE];
png_size_t read, remaining, err;
check = 0;
remaining = length;
do
{
read = MIN(NEAR_BUF_SIZE, remaining);
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(io_ptr), buf, read, &err, NULL) )
err = 0;
#else
err = fread(buf, (png_size_t)1, read, io_ptr);
#endif
png_memcpy(data, buf, read); /* copy far buffer to near buffer */
if(err != read)
break;
else
check += err;
data += read;
remaining -= read;
}
while (remaining != 0);
}
if ((png_uint_32)check != (png_uint_32)length)
png_error(png_ptr, "read Error");
}
#endif
#endif
/* This function allows the application to supply a new input function
for libpng if standard C streams aren't being used.
This function takes as its arguments:
png_ptr - pointer to a png input data structure
io_ptr - pointer to user supplied structure containing info about
the input functions. May be NULL.
read_data_fn - pointer to a new input function that takes as its
arguments a pointer to a png_struct, a pointer to
a location where input data can be stored, and a 32-bit
unsigned int that is the number of bytes to be read.
To exit and output any fatal error messages the new write
function should call png_error(png_ptr, "Error msg"). */
void PNGAPI
png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr read_data_fn)
{
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
if (read_data_fn != NULL)
png_ptr->read_data_fn = read_data_fn;
else
png_ptr->read_data_fn = png_default_read_data;
#else
png_ptr->read_data_fn = read_data_fn;
#endif
/* It is an error to write to a read device */
if (png_ptr->write_data_fn != NULL)
{
png_ptr->write_data_fn = NULL;
png_warning(png_ptr,
"It's an error to set both read_data_fn and write_data_fn in the ");
png_warning(png_ptr,
"same structure. Resetting write_data_fn to NULL.");
}
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
png_ptr->output_flush_fn = NULL;
#endif
}
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/* pngwio.c - functions for data output
*
* libpng 1.2.7 - September 12, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 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 output. Users who need
* special handling are expected to write functions that have the same
* arguments as these and perform similar functions, but that possibly
* use different output methods. Note that you shouldn't change these
* functions, but rather write replacement functions and then change
* them at run time with png_set_write_fn(...).
*/
#define PNG_INTERNAL
#include "png.h"
#ifdef PNG_WRITE_SUPPORTED
/* Write the data to whatever output you are using. The default routine
writes to a file pointer. Note that this routine sometimes gets called
with very small lengths, so you should implement some kind of simple
buffering if you are using unbuffered writes. This should never be asked
to write more than 64K on a 16 bit machine. */
void /* PRIVATE */
png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
if (png_ptr->write_data_fn != NULL )
(*(png_ptr->write_data_fn))(png_ptr, data, length);
else
png_error(png_ptr, "Call to NULL write function");
}
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual writing of data. If you are
not writing to a standard C stream, you should create a replacement
write_data function and use it at run time with png_set_write_fn(), rather
than changing the library. */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
#if defined(_WIN32_WCE)
if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
#endif
if (check != length)
png_error(png_ptr, "Write Error");
}
#else
/* this is the model-independent version. Since the standard I/O library
can't handle far buffers in the medium and small models, we have to copy
the data.
*/
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
png_FILE_p io_ptr;
/* Check if data really is near. If so, use usual code. */
near_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
if ((png_bytep)near_data == data)
{
#if defined(_WIN32_WCE)
if ( !WriteFile(io_ptr, near_data, length, &check, NULL) )
check = 0;
#else
check = fwrite(near_data, 1, length, io_ptr);
#endif
}
else
{
png_byte buf[NEAR_BUF_SIZE];
png_size_t written, remaining, err;
check = 0;
remaining = length;
do
{
written = MIN(NEAR_BUF_SIZE, remaining);
png_memcpy(buf, data, written); /* copy far buffer to near buffer */
#if defined(_WIN32_WCE)
if ( !WriteFile(io_ptr, buf, written, &err, NULL) )
err = 0;
#else
err = fwrite(buf, 1, written, io_ptr);
#endif
if (err != written)
break;
else
check += err;
data += written;
remaining -= written;
}
while (remaining != 0);
}
if (check != length)
png_error(png_ptr, "Write Error");
}
#endif
#endif
/* This function is called to output any data pending writing (normally
to disk). After png_flush is called, there should be no data pending
writing in any buffers. */
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
void /* PRIVATE */
png_flush(png_structp png_ptr)
{
if (png_ptr->output_flush_fn != NULL)
(*(png_ptr->output_flush_fn))(png_ptr);
}
#if !defined(PNG_NO_STDIO)
void PNGAPI
png_default_flush(png_structp png_ptr)
{
#if !defined(_WIN32_WCE)
png_FILE_p io_ptr;
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
if (io_ptr != NULL)
fflush(io_ptr);
#endif
}
#endif
#endif
/* This function allows the application to supply new output functions for
libpng if standard C streams aren't being used.
This function takes as its arguments:
png_ptr - pointer to a png output data structure
io_ptr - pointer to user supplied structure containing info about
the output functions. May be NULL.
write_data_fn - pointer to a new output function that takes as its
arguments a pointer to a png_struct, a pointer to
data to be written, and a 32-bit unsigned int that is
the number of bytes to be written. The new write
function should call png_error(png_ptr, "Error msg")
to exit and output any fatal error messages.
flush_data_fn - pointer to a new flush function that takes as its
arguments a pointer to a png_struct. After a call to
the flush function, there should be no data in any buffers
or pending transmission. If the output method doesn't do
any buffering of ouput, a function prototype must still be
supplied although it doesn't have to do anything. If
PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
time, output_flush_fn will be ignored, although it must be
supplied for compatibility. */
void PNGAPI
png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
{
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
if (write_data_fn != NULL)
png_ptr->write_data_fn = write_data_fn;
else
png_ptr->write_data_fn = png_default_write_data;
#else
png_ptr->write_data_fn = write_data_fn;
#endif
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
#if !defined(PNG_NO_STDIO)
if (output_flush_fn != NULL)
png_ptr->output_flush_fn = output_flush_fn;
else
png_ptr->output_flush_fn = png_default_flush;
#else
png_ptr->output_flush_fn = output_flush_fn;
#endif
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */
if (png_ptr->read_data_fn != NULL)
{
png_ptr->read_data_fn = NULL;
png_warning(png_ptr,
"Attempted to set both read_data_fn and write_data_fn in");
png_warning(png_ptr,
"the same structure. Resetting read_data_fn to NULL.");
}
}
#if defined(USE_FAR_KEYWORD)
#if defined(_MSC_VER)
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
{
void *near_ptr;
void FAR *far_ptr;
FP_OFF(near_ptr) = FP_OFF(ptr);
far_ptr = (void FAR *)near_ptr;
if(check != 0)
if(FP_SEG(ptr) != FP_SEG(far_ptr))
png_error(png_ptr,"segment lost in conversion");
return(near_ptr);
}
# else
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
{
void *near_ptr;
void FAR *far_ptr;
near_ptr = (void FAR *)ptr;
far_ptr = (void FAR *)near_ptr;
if(check != 0)
if(far_ptr != ptr)
png_error(png_ptr,"segment lost in conversion");
return(near_ptr);
}
# endif
# endif
#endif /* PNG_WRITE_SUPPORTED */
/* pngwio.c - functions for data output
*
* libpng 1.2.7 - September 12, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 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 output. Users who need
* special handling are expected to write functions that have the same
* arguments as these and perform similar functions, but that possibly
* use different output methods. Note that you shouldn't change these
* functions, but rather write replacement functions and then change
* them at run time with png_set_write_fn(...).
*/
#define PNG_INTERNAL
#include "png.h"
#ifdef PNG_WRITE_SUPPORTED
/* Write the data to whatever output you are using. The default routine
writes to a file pointer. Note that this routine sometimes gets called
with very small lengths, so you should implement some kind of simple
buffering if you are using unbuffered writes. This should never be asked
to write more than 64K on a 16 bit machine. */
void /* PRIVATE */
png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
if (png_ptr->write_data_fn != NULL )
(*(png_ptr->write_data_fn))(png_ptr, data, length);
else
png_error(png_ptr, "Call to NULL write function");
}
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual writing of data. If you are
not writing to a standard C stream, you should create a replacement
write_data function and use it at run time with png_set_write_fn(), rather
than changing the library. */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
#if defined(_WIN32_WCE)
if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
#endif
if (check != length)
png_error(png_ptr, "Write Error");
}
#else
/* this is the model-independent version. Since the standard I/O library
can't handle far buffers in the medium and small models, we have to copy
the data.
*/
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
png_FILE_p io_ptr;
/* Check if data really is near. If so, use usual code. */
near_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
if ((png_bytep)near_data == data)
{
#if defined(_WIN32_WCE)
if ( !WriteFile(io_ptr, near_data, length, &check, NULL) )
check = 0;
#else
check = fwrite(near_data, 1, length, io_ptr);
#endif
}
else
{
png_byte buf[NEAR_BUF_SIZE];
png_size_t written, remaining, err;
check = 0;
remaining = length;
do
{
written = MIN(NEAR_BUF_SIZE, remaining);
png_memcpy(buf, data, written); /* copy far buffer to near buffer */
#if defined(_WIN32_WCE)
if ( !WriteFile(io_ptr, buf, written, &err, NULL) )
err = 0;
#else
err = fwrite(buf, 1, written, io_ptr);
#endif
if (err != written)
break;
else
check += err;
data += written;
remaining -= written;
}
while (remaining != 0);
}
if (check != length)
png_error(png_ptr, "Write Error");
}
#endif
#endif
/* This function is called to output any data pending writing (normally
to disk). After png_flush is called, there should be no data pending
writing in any buffers. */
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
void /* PRIVATE */
png_flush(png_structp png_ptr)
{
if (png_ptr->output_flush_fn != NULL)
(*(png_ptr->output_flush_fn))(png_ptr);
}
#if !defined(PNG_NO_STDIO)
void PNGAPI
png_default_flush(png_structp png_ptr)
{
#if !defined(_WIN32_WCE)
png_FILE_p io_ptr;
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
if (io_ptr != NULL)
fflush(io_ptr);
#endif
}
#endif
#endif
/* This function allows the application to supply new output functions for
libpng if standard C streams aren't being used.
This function takes as its arguments:
png_ptr - pointer to a png output data structure
io_ptr - pointer to user supplied structure containing info about
the output functions. May be NULL.
write_data_fn - pointer to a new output function that takes as its
arguments a pointer to a png_struct, a pointer to
data to be written, and a 32-bit unsigned int that is
the number of bytes to be written. The new write
function should call png_error(png_ptr, "Error msg")
to exit and output any fatal error messages.
flush_data_fn - pointer to a new flush function that takes as its
arguments a pointer to a png_struct. After a call to
the flush function, there should be no data in any buffers
or pending transmission. If the output method doesn't do
any buffering of ouput, a function prototype must still be
supplied although it doesn't have to do anything. If
PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
time, output_flush_fn will be ignored, although it must be
supplied for compatibility. */
void PNGAPI
png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
{
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
if (write_data_fn != NULL)
png_ptr->write_data_fn = write_data_fn;
else
png_ptr->write_data_fn = png_default_write_data;
#else
png_ptr->write_data_fn = write_data_fn;
#endif
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
#if !defined(PNG_NO_STDIO)
if (output_flush_fn != NULL)
png_ptr->output_flush_fn = output_flush_fn;
else
png_ptr->output_flush_fn = png_default_flush;
#else
png_ptr->output_flush_fn = output_flush_fn;
#endif
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */
if (png_ptr->read_data_fn != NULL)
{
png_ptr->read_data_fn = NULL;
png_warning(png_ptr,
"Attempted to set both read_data_fn and write_data_fn in");
png_warning(png_ptr,
"the same structure. Resetting read_data_fn to NULL.");
}
}
#if defined(USE_FAR_KEYWORD)
#if defined(_MSC_VER)
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
{
void *near_ptr;
void FAR *far_ptr;
FP_OFF(near_ptr) = FP_OFF(ptr);
far_ptr = (void FAR *)near_ptr;
if(check != 0)
if(FP_SEG(ptr) != FP_SEG(far_ptr))
png_error(png_ptr,"segment lost in conversion");
return(near_ptr);
}
# else
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
{
void *near_ptr;
void FAR *far_ptr;
near_ptr = (void FAR *)ptr;
far_ptr = (void FAR *)near_ptr;
if(check != 0)
if(far_ptr != ptr)
png_error(png_ptr,"segment lost in conversion");
return(near_ptr);
}
# endif
# endif
#endif /* PNG_WRITE_SUPPORTED */
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