/* pngwio.c - functions for data output
*
- * libpng 1.0.3 - January 14, 1999
+ * Last changed in libpng 1.2.30 [August 15, 2008]
* For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
- * Copyright (c) 1996, 1997 Andreas Dilger
- * Copyright (c) 1998, 1999 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2008 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
#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
buffering if you are using unbuffered writes. This should never be asked
to write more than 64K on a 16 bit machine. */
-void
+void /* PRIVATE */
png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
if (png_ptr->write_data_fn != NULL )
write_data function and use it at run time with png_set_write_fn(), rather
than changing the library. */
#ifndef USE_FAR_KEYWORD
-#ifdef __VISAGECPP__
-static void _Optlink
+void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
-#else
-static void
-png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
-#endif
{
png_uint_32 check;
- check = fwrite(data, 1, length, (FILE *)(png_ptr->io_ptr));
+ if (png_ptr == NULL) return;
+#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
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
-#ifdef __VISAGECPP__
-static void _Optlink
+void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
-#else
-static void
-png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
-#endif
{
png_uint_32 check;
png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
- FILE *io_ptr;
+ png_FILE_p io_ptr;
+ if (png_ptr == NULL) return;
/* Check if data really is near. If so, use usual code. */
near_data = (png_byte *)CVT_PTR_NOCHECK(data);
- io_ptr = (FILE *)CVT_PTR(png_ptr->io_ptr);
+ 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
{
{
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
while (remaining != 0);
}
if (check != length)
- {
png_error(png_ptr, "Write Error");
- }
}
#endif
to disk). After png_flush is called, there should be no data pending
writing in any buffers. */
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
-void
+void /* PRIVATE */
png_flush(png_structp png_ptr)
{
if (png_ptr->output_flush_fn != NULL)
}
#if !defined(PNG_NO_STDIO)
-#ifdef __VISAGECPP__
-static void _Optlink
+void PNGAPI
png_default_flush(png_structp png_ptr)
-#else
-static void
-png_default_flush(png_structp png_ptr)
-#endif
{
- FILE *io_ptr;
- io_ptr = (FILE *)CVT_PTR((png_ptr->io_ptr));
+#if !defined(_WIN32_WCE)
+ png_FILE_p io_ptr;
+#endif
+ if (png_ptr == NULL) return;
+#if !defined(_WIN32_WCE)
+ io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
if (io_ptr != NULL)
fflush(io_ptr);
+#endif
}
#endif
#endif
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
+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)
{
+ if (png_ptr == NULL) return;
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
#if defined(USE_FAR_KEYWORD)
#if defined(_MSC_VER)
-void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
+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");
+ 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 *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");
+ 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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