reusing existing API

[wxWidgets.git] / src / png / pngtest.c

diff --git a/src/png/pngtest.c b/src/png/pngtest.c
index a1ba8ec2eafd13cb8a7a04c7465fcb2b59bf0c96..c52aef3e6b53665c2729c1dd6eea8405e442f855 100644 (file)
--- a/src/png/pngtest.c
+++ b/src/png/pngtest.c
@@ -1,11 +1,14 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
 
 /* pngtest.c - a simple test program to test libpng
  *

- * libpng 1.0.3 -January 14, 1999
- * 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
+ * Last changed in libpng 1.5.6 [November 3, 2011]
+ * Copyright (c) 1998-2011 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 code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h

  *
  * This program reads in a PNG image, writes it out again, and then
  * compares the two files.  If the files are identical, this shows that
  *
  * This program reads in a PNG image, writes it out again, and then
  * compares the two files.  If the files are identical, this shows that


@@ -15,11 +18,12 @@
  *
  * The program will report "FAIL" in certain legitimate cases:
  * 1) when the compression level or filter selection method is changed.
  *
  * The program will report "FAIL" in certain legitimate cases:
  * 1) when the compression level or filter selection method is changed.

- * 2) when the chunk size is not 8K.
- * 3) unknown ancillary chunks exist in the input file.
+ * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192.
+ * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks
+ *    exist in the input file.

  * 4) others not listed here...
  * In these cases, it is best to check with another tool such as "pngcheck"
  * 4) others not listed here...
  * In these cases, it is best to check with another tool such as "pngcheck"

- * to see what the differences between the two images are.
+ * to see what the differences between the two files are.

  *
  * If a filename is given on the command-line, then this file is used
  * for the input, rather than the default "pngtest.png".  This allows
  *
  * If a filename is given on the command-line, then this file is used
  * for the input, rather than the default "pngtest.png".  This allows


@@ -27,20 +31,74 @@
  * of files at once by typing "pngtest -m file1.png file2.png ..."
  */
 
  * of files at once by typing "pngtest -m file1.png file2.png ..."
  */
 

-#include <stdio.h>
-#include <stdlib.h>
+#define _POSIX_SOURCE 1
+
+#include "zlib.h"
+#include "png.h"
+/* Copied from pngpriv.h but only used in error messages below. */
+#ifndef PNG_ZBUF_SIZE
+#  define PNG_ZBUF_SIZE 8192
+#endif
+#  include <stdio.h>
+#  include <stdlib.h>
+#  include <string.h>
+#  define FCLOSE(file) fclose(file)
+
+#ifndef PNG_STDIO_SUPPORTED
+typedef FILE                * png_FILE_p;
+#endif

 
 

-/* Makes pngtest verbose so we can find problems (needs to be before png.h) */
+/* Makes pngtest verbose so we can find problems. */

 #ifndef PNG_DEBUG
 #ifndef PNG_DEBUG

-#define PNG_DEBUG 0
+#  define PNG_DEBUG 0

 #endif
 
 #endif
 

-#include "png.h"
+#if PNG_DEBUG > 1
+#  define pngtest_debug(m)        ((void)fprintf(stderr, m "\n"))
+#  define pngtest_debug1(m,p1)    ((void)fprintf(stderr, m "\n", p1))
+#  define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
+#else
+#  define pngtest_debug(m)        ((void)0)
+#  define pngtest_debug1(m,p1)    ((void)0)
+#  define pngtest_debug2(m,p1,p2) ((void)0)
+#endif

 
 

-#if defined(PNG_TIME_RFC1123_SUPPORTED)
-static int tIME_chunk_present=0;
-static char tIME_string[30] = "no tIME chunk present in file";
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#if !PNG_DEBUG
+#  define SINGLE_ROWBUF_ALLOC  /* Makes buffer overruns easier to nail */
+#endif
+
+/* The code uses memcmp and memcpy on large objects (typically row pointers) so
+ * it is necessary to do soemthing special on certain architectures, note that
+ * the actual support for this was effectively removed in 1.4, so only the
+ * memory remains in this program:
+ */
+#define CVT_PTR(ptr)         (ptr)
+#define CVT_PTR_NOCHECK(ptr) (ptr)
+#define png_memcmp  memcmp
+#define png_memcpy  memcpy
+#define png_memset  memset
+
+/* Turn on CPU timing
+#define PNGTEST_TIMING
+*/
+
+#ifndef PNG_FLOATING_POINT_SUPPORTED
+#undef PNGTEST_TIMING
+#endif
+
+#ifdef PNGTEST_TIMING
+static float t_start, t_stop, t_decode, t_encode, t_misc;
+#include <time.h>
+#endif
+
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+#define PNG_tIME_STRING_LENGTH 29
+static int tIME_chunk_present = 0;
+static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
+#endif
+
+static int verbose = 0;
+static int strict = 0;

 
 int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
 
 
 int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
 


@@ -48,55 +106,91 @@ int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
 #include <mem.h>
 #endif
 
 #include <mem.h>
 #endif
 

-/* defined so I can write to a file on gui/windowing platforms */
+/* Defined so I can write to a file on gui/windowing platforms */

 /*  #define STDERR stderr  */
 /*  #define STDERR stderr  */

-#define STDERR stdout   /* for DOS */
+#define STDERR stdout   /* For DOS */
+
+/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
+#ifndef png_jmpbuf
+#  define png_jmpbuf(png_ptr) png_ptr->jmpbuf
+#endif

 
 

-/* example of using row callbacks to make a simple progress meter */
-static int status_pass=1;
-static int status_dots_requested=0;
-static int status_dots=1;
+/* Example of using row callbacks to make a simple progress meter */
+static int status_pass = 1;
+static int status_dots_requested = 0;
+static int status_dots = 1;

 
 

-void
+void PNGCBAPI
+read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
+void PNGCBAPI

 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 {
 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 {

-    if(png_ptr == NULL || row_number > 0x3fffffffL) return;
-    if(status_pass != pass)
-    {
-       fprintf(stdout,"\n Pass %d: ",pass);
-       status_pass = pass;
-       status_dots = 30;
-    }
-    status_dots--;
-    if(status_dots == 0)
-    {
-       fprintf(stdout, "\n         ");
-       status_dots=30;
-    }
-    fprintf(stdout, "r");
+   if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
+      return;
+
+   if (status_pass != pass)
+   {
+      fprintf(stdout, "\n Pass %d: ", pass);
+      status_pass = pass;
+      status_dots = 31;
+   }
+
+   status_dots--;
+
+   if (status_dots == 0)
+   {
+      fprintf(stdout, "\n         ");
+      status_dots=30;
+   }
+
+   fprintf(stdout, "r");

 }
 
 }
 

-void
+void PNGCBAPI
+write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
+void PNGCBAPI

 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 {
 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 {

-    if(png_ptr == NULL || row_number > 0x3fffffffL || pass > 7) return;
-    fprintf(stdout, "w");
+   if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
+      return;
+
+   fprintf(stdout, "w");

 }
 
 
 }
 
 

-#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-/* example of using user transform callback (we don't transform anything,
-   but merely count the zero samples) */
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+/* Example of using user transform callback (we don't transform anything,
+ * but merely examine the row filters.  We set this to 256 rather than
+ * 5 in case illegal filter values are present.)
+ */
+static png_uint_32 filters_used[256];
+void PNGCBAPI
+count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data);
+void PNGCBAPI
+count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
+{
+   if (png_ptr != NULL && row_info != NULL)
+      ++filters_used[*(data - 1)];
+}
+#endif
+
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+/* Example of using user transform callback (we don't transform anything,
+ * but merely count the zero samples)
+ */

 
 static png_uint_32 zero_samples;
 
 
 static png_uint_32 zero_samples;
 

-void
+void PNGCBAPI
+count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data);
+void PNGCBAPI

 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 {
    png_bytep dp = data;
 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 {
    png_bytep dp = data;

-   if(png_ptr == NULL)return;
+   if (png_ptr == NULL)
+      return;

 
 

-   /* contents of row_info:
+   /* Contents of row_info:

     *  png_uint_32 width      width of row
     *  png_uint_32 rowbytes   number of bytes in row
     *  png_byte color_type    color type of pixels
     *  png_uint_32 width      width of row
     *  png_uint_32 rowbytes   number of bytes in row
     *  png_byte color_type    color type of pixels


@@ -105,109 +199,178 @@ count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
     *  png_byte pixel_depth   bits per pixel (depth*channels)
     */
 
     *  png_byte pixel_depth   bits per pixel (depth*channels)
     */
 

-    /* counts the number of zero samples (or zero pixels if color_type is 3 */
+    /* Counts the number of zero samples (or zero pixels if color_type is 3 */

 
 

-    if(row_info->color_type == 0 || row_info->color_type == 3)
+    if (row_info->color_type == 0 || row_info->color_type == 3)

     {
     {

-       int pos=0;
+       int pos = 0;

        png_uint_32 n, nstop;
        png_uint_32 n, nstop;

-       for (n=0, nstop=row_info->width; n<nstop; n++)
+
+       for (n = 0, nstop=row_info->width; n<nstop; n++)

        {
        {

-          if(row_info->bit_depth == 1)
+          if (row_info->bit_depth == 1)

           {
           {

-             if(((*dp << pos++ )& 0x80) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << pos++ ) & 0x80) == 0)
+                zero_samples++;
+
+             if (pos == 8)

              {
                 pos = 0;
                 dp++;
              }
           }
              {
                 pos = 0;
                 dp++;
              }
           }

-          if(row_info->bit_depth == 2)
+
+          if (row_info->bit_depth == 2)

           {
           {

-             if(((*dp << (pos+=2))& 0xc0) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << (pos+=2)) & 0xc0) == 0)
+                zero_samples++;
+
+             if (pos == 8)

              {
                 pos = 0;
                 dp++;
              }
           }
              {
                 pos = 0;
                 dp++;
              }
           }

-          if(row_info->bit_depth == 4)
+
+          if (row_info->bit_depth == 4)

           {
           {

-             if(((*dp << (pos+=4))& 0xf0) == 0) zero_samples++;
-             if(pos == 8)
+             if (((*dp << (pos+=4)) & 0xf0) == 0)
+                zero_samples++;
+
+             if (pos == 8)

              {
                 pos = 0;
                 dp++;
              }
           }
              {
                 pos = 0;
                 dp++;
              }
           }

-          if(row_info->bit_depth == 8)
-             if(*dp++ == 0) zero_samples++;
-          if(row_info->bit_depth == 16)
+
+          if (row_info->bit_depth == 8)
+             if (*dp++ == 0)
+                zero_samples++;
+
+          if (row_info->bit_depth == 16)

           {
           {

-             if((*dp | *(dp+1)) == 0) zero_samples++;
+             if ((*dp | *(dp+1)) == 0)
+                zero_samples++;

              dp+=2;
           }
        }
     }
              dp+=2;
           }
        }
     }

-    else /* other color types */
+    else /* Other color types */

     {
        png_uint_32 n, nstop;
        int channel;
        int color_channels = row_info->channels;
     {
        png_uint_32 n, nstop;
        int channel;
        int color_channels = row_info->channels;

-       if(row_info->color_type > 3)color_channels--;
+       if (row_info->color_type > 3)color_channels--;

 
 

-       for (n=0, nstop=row_info->width; n<nstop; n++)
+       for (n = 0, nstop=row_info->width; n<nstop; n++)

        {
           for (channel = 0; channel < color_channels; channel++)
           {
        {
           for (channel = 0; channel < color_channels; channel++)
           {

-             if(row_info->bit_depth == 8)
-                if(*dp++ == 0) zero_samples++;
-             if(row_info->bit_depth == 16)
+             if (row_info->bit_depth == 8)
+                if (*dp++ == 0)
+                   zero_samples++;
+
+             if (row_info->bit_depth == 16)

              {
              {

-                if((*dp | *(dp+1)) == 0) zero_samples++;
+                if ((*dp | *(dp+1)) == 0)
+                   zero_samples++;
+

                 dp+=2;
              }
           }
                 dp+=2;
              }
           }

-          if(row_info->color_type > 3)
+          if (row_info->color_type > 3)

           {
              dp++;
           {
              dp++;

-             if(row_info->bit_depth == 16)dp++;
+             if (row_info->bit_depth == 16)
+                dp++;

           }
        }
     }
 }
 #endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
 
           }
        }
     }
 }
 #endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
 

-static int verbose = 0;

 static int wrote_question = 0;
 
 static int wrote_question = 0;
 

-#if defined(PNG_NO_STDIO)
+#ifndef PNG_STDIO_SUPPORTED

 /* START of code to validate stdio-free compilation */
 /* START of code to validate stdio-free compilation */

-/* These copies of the default read/write functions come from pngrio.c and */
-/* pngwio.c.  They allow "don't include stdio" testing of the library. */
-/* 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. */
+/* These copies of the default read/write functions come from pngrio.c and
+ * pngwio.c.  They allow "don't include stdio" testing of the library.
+ * 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.
+ */
+
+#ifdef PNG_IO_STATE_SUPPORTED
+void
+pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
+   png_uint_32 io_op);
+void
+pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
+   png_uint_32 io_op)
+{
+   png_uint_32 io_state = png_get_io_state(png_ptr);
+   int err = 0;
+
+   /* Check if the current operation (reading / writing) is as expected. */
+   if ((io_state & PNG_IO_MASK_OP) != io_op)
+      png_error(png_ptr, "Incorrect operation in I/O state");
+
+   /* Check if the buffer size specific to the current location
+    * (file signature / header / data / crc) is as expected.
+    */
+   switch (io_state & PNG_IO_MASK_LOC)
+   {
+   case PNG_IO_SIGNATURE:
+      if (data_length > 8)
+         err = 1;
+      break;
+   case PNG_IO_CHUNK_HDR:
+      if (data_length != 8)
+         err = 1;
+      break;
+   case PNG_IO_CHUNK_DATA:
+      break;  /* no restrictions here */
+   case PNG_IO_CHUNK_CRC:
+      if (data_length != 4)
+         err = 1;
+      break;
+   default:
+      err = 1;  /* uninitialized */
+   }
+   if (err)
+      png_error(png_ptr, "Bad I/O state or buffer size");
+}
+#endif
+

 #ifndef USE_FAR_KEYWORD
 #ifndef USE_FAR_KEYWORD

-static void
-png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
+static void PNGCBAPI
+pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)

 {
 {

-   png_size_t check;
+   png_size_t check = 0;
+   png_voidp io_ptr;

 
    /* 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.
     */
 
    /* 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.
     */

-   check = (png_size_t)fread(data, (png_size_t)1, length,
-      (FILE *)png_ptr->io_ptr);
+   io_ptr = png_get_io_ptr(png_ptr);
+   if (io_ptr != NULL)
+   {
+      check = fread(data, 1, length, (png_FILE_p)io_ptr);
+   }

 
    if (check != length)
    {
       png_error(png_ptr, "Read Error");
    }
 
    if (check != length)
    {
       png_error(png_ptr, "Read Error");
    }

+
+#ifdef PNG_IO_STATE_SUPPORTED
+   pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
+#endif

 }
 #else
 }
 #else

-/* this is the model-independent version. Since the standard I/O library
+/* 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.
 */
    can't handle far buffers in the medium and small models, we have to copy
    the data.
 */


@@ -215,16 +378,16 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 #define NEAR_BUF_SIZE 1024
 #define MIN(a,b) (a <= b ? a : b)
 
 #define NEAR_BUF_SIZE 1024
 #define MIN(a,b) (a <= b ? a : b)
 

-static void
-png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
+static void PNGCBAPI
+pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)

 {
 {

-   int check;
+   png_size_t check;

    png_byte *n_data;
    png_byte *n_data;

-   FILE *io_ptr;
+   png_FILE_p io_ptr;

 
    /* Check if data really is near. If so, use usual code. */
    n_data = (png_byte *)CVT_PTR_NOCHECK(data);
 
    /* Check if data really is near. If so, use usual code. */
    n_data = (png_byte *)CVT_PTR_NOCHECK(data);

-   io_ptr = (FILE *)CVT_PTR(png_ptr->io_ptr);
+   io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr));

    if ((png_bytep)n_data == data)
    {
       check = fread(n_data, 1, length, io_ptr);
    if ((png_bytep)n_data == data)
    {
       check = fread(n_data, 1, length, io_ptr);


@@ -235,12 +398,13 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
       png_size_t read, remaining, err;
       check = 0;
       remaining = length;
       png_size_t read, remaining, err;
       check = 0;
       remaining = length;

+

       do
       {
          read = MIN(NEAR_BUF_SIZE, remaining);
       do
       {
          read = MIN(NEAR_BUF_SIZE, remaining);

-         err = fread(buf, (png_size_t)1, read, io_ptr);
-         png_memcpy(data, buf, read); /* copy far buffer to near buffer */
-         if(err != read)
+         err = fread(buf, 1, 1, io_ptr);
+         png_memcpy(data, buf, read); /* Copy far buffer to near buffer */
+         if (err != read)

             break;
          else
             check += err;
             break;
          else
             check += err;


@@ -249,42 +413,49 @@ png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
       }
       while (remaining != 0);
    }
       }
       while (remaining != 0);
    }

+

    if (check != length)
    if (check != length)

-   {
-      png_error(png_ptr, "read Error");
-   }
+      png_error(png_ptr, "Read Error");
+
+#ifdef PNG_IO_STATE_SUPPORTED
+   pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
+#endif

 }
 #endif /* USE_FAR_KEYWORD */
 
 }
 #endif /* USE_FAR_KEYWORD */
 

-#if defined(PNG_WRITE_FLUSH_SUPPORTED)
-static void
-png_default_flush(png_structp png_ptr)
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+static void PNGCBAPI
+pngtest_flush(png_structp png_ptr)

 {
 {

-   FILE *io_ptr;
-   io_ptr = (FILE *)CVT_PTR((png_ptr->io_ptr));
-   if (io_ptr != NULL)
-      fflush(io_ptr);
+   /* Do nothing; fflush() is said to be just a waste of energy. */
+   PNG_UNUSED(png_ptr)   /* Stifle compiler warning */

 }
 #endif
 
 /* This is the function that does the actual writing of data.  If you are
 }
 #endif
 
 /* 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. */
+ * 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
 #ifndef USE_FAR_KEYWORD

-static void
-png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
+static void PNGCBAPI
+pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)

 {
 {

-   png_uint_32 check;
+   png_size_t check;
+
+   check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr));

 
 

-   check = fwrite(data, 1, length, (FILE *)(png_ptr->io_ptr));

    if (check != length)
    {
       png_error(png_ptr, "Write Error");
    }
    if (check != length)
    {
       png_error(png_ptr, "Write Error");
    }

+
+#ifdef PNG_IO_STATE_SUPPORTED
+   pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
+#endif

 }
 #else
 }
 #else

-/* this is the model-independent version. Since the standard I/O library
+/* 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.
 */
    can't handle far buffers in the medium and small models, we have to copy
    the data.
 */


@@ -292,30 +463,33 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
 #define NEAR_BUF_SIZE 1024
 #define MIN(a,b) (a <= b ? a : b)
 
 #define NEAR_BUF_SIZE 1024
 #define MIN(a,b) (a <= b ? a : b)
 

-static void
-png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
+static void PNGCBAPI
+pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)

 {
 {

-   png_uint_32 check;
+   png_size_t check;

    png_byte *near_data;  /* Needs to be "png_byte *" instead of "png_bytep" */
    png_byte *near_data;  /* Needs to be "png_byte *" instead of "png_bytep" */

-   FILE *io_ptr;
+   png_FILE_p io_ptr;

 
    /* Check if data really is near. If so, use usual code. */
    near_data = (png_byte *)CVT_PTR_NOCHECK(data);
 
    /* 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_get_io_ptr(png_ptr));
+

    if ((png_bytep)near_data == data)
    {
       check = fwrite(near_data, 1, length, io_ptr);
    }
    if ((png_bytep)near_data == data)
    {
       check = fwrite(near_data, 1, length, io_ptr);
    }

+

    else
    {
       png_byte buf[NEAR_BUF_SIZE];
       png_size_t written, remaining, err;
       check = 0;
       remaining = length;
    else
    {
       png_byte buf[NEAR_BUF_SIZE];
       png_size_t written, remaining, err;
       check = 0;
       remaining = length;

+

       do
       {
          written = MIN(NEAR_BUF_SIZE, remaining);
       do
       {
          written = MIN(NEAR_BUF_SIZE, remaining);

-         png_memcpy(buf, data, written); /* copy far buffer to near buffer */
+         png_memcpy(buf, data, written); /* Copy far buffer to near buffer */

          err = fwrite(buf, 1, written, io_ptr);
          if (err != written)
             break;
          err = fwrite(buf, 1, written, io_ptr);
          if (err != written)
             break;


@@ -326,12 +500,16 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
       }
       while (remaining != 0);
    }
       }
       while (remaining != 0);
    }

+

    if (check != length)
    {
       png_error(png_ptr, "Write Error");
    }
    if (check != length)
    {
       png_error(png_ptr, "Write Error");
    }

-}

 
 

+#ifdef PNG_IO_STATE_SUPPORTED
+   pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
+#endif
+}

 #endif /* USE_FAR_KEYWORD */
 
 /* This function is called when there is a warning, but the library thinks
 #endif /* USE_FAR_KEYWORD */
 
 /* This function is called when there is a warning, but the library thinks


@@ -339,13 +517,18 @@ png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
  * here if you don't want to.  In the default configuration, png_ptr is
  * not used, but it is passed in case it may be useful.
  */
  * here if you don't want to.  In the default configuration, png_ptr is
  * not used, but it is passed in case it may be useful.
  */

-static void
-png_default_warning(png_structp png_ptr, png_const_charp message)
+static void PNGCBAPI
+pngtest_warning(png_structp png_ptr, png_const_charp message)

 {
    PNG_CONST char *name = "UNKNOWN (ERROR!)";
 {
    PNG_CONST char *name = "UNKNOWN (ERROR!)";

-   if (png_ptr != NULL && png_ptr->error_ptr != NULL)
-      name = png_ptr->error_ptr;
-   fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
+   char *test;
+   test = png_get_error_ptr(png_ptr);
+
+   if (test == NULL)
+     fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
+
+   else
+     fprintf(STDERR, "%s: libpng warning: %s\n", test, message);

 }
 
 /* This is the default error handling function.  Note that replacements for
 }
 
 /* This is the default error handling function.  Note that replacements for


@@ -353,29 +536,32 @@ png_default_warning(png_structp png_ptr, png_const_charp message)
  * function is used by default, or if the program supplies NULL for the
  * error function pointer in png_set_error_fn().
  */
  * function is used by default, or if the program supplies NULL for the
  * error function pointer in png_set_error_fn().
  */

-static void
-png_default_error(png_structp png_ptr, png_const_charp message)
+static void PNGCBAPI
+pngtest_error(png_structp png_ptr, png_const_charp message)

 {
 {

-   png_default_warning(png_ptr, message);
+   pngtest_warning(png_ptr, message);

    /* We can return because png_error calls the default handler, which is
    /* We can return because png_error calls the default handler, which is

-    * actually OK in this case. */
+    * actually OK in this case.
+    */

 }
 }

-#endif /* PNG_NO_STDIO */
+#endif /* !PNG_STDIO_SUPPORTED */

 /* END of code to validate stdio-free compilation */
 
 /* START of code to validate memory allocation and deallocation */
 /* END of code to validate stdio-free compilation */
 
 /* START of code to validate memory allocation and deallocation */

-#ifdef PNG_USER_MEM_SUPPORTED
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG

 
 /* Allocate memory.  For reasonable files, size should never exceed
 
 /* Allocate memory.  For reasonable files, size should never exceed

-   64K.  However, zlib may allocate more then 64K if you don't tell
-   it not to.  See zconf.h and png.h for more information.  zlib does
-   need to allocate exactly 64K, so whatever you call here must
-   have the ability to do that.
-
-   This piece of code can be compiled to validate max 64K allocations
-   by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K. */
-typedef struct memory_information {
-   png_uint_32                    size;
+ * 64K.  However, zlib may allocate more then 64K if you don't tell
+ * it not to.  See zconf.h and png.h for more information.  zlib does
+ * need to allocate exactly 64K, so whatever you call here must
+ * have the ability to do that.
+ *
+ * This piece of code can be compiled to validate max 64K allocations
+ * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
+ */
+typedef struct memory_information
+{
+   png_alloc_size_t          size;

    png_voidp                 pointer;
    struct memory_information FAR *next;
 } memory_information;
    png_voidp                 pointer;
    struct memory_information FAR *next;
 } memory_information;


@@ -384,45 +570,76 @@ typedef memory_information FAR *memory_infop;
 static memory_infop pinformation = NULL;
 static int current_allocation = 0;
 static int maximum_allocation = 0;
 static memory_infop pinformation = NULL;
 static int current_allocation = 0;
 static int maximum_allocation = 0;

+static int total_allocation = 0;
+static int num_allocations = 0;

 
 

-extern PNG_EXPORT(png_voidp,png_debug_malloc) PNGARG((png_structp png_ptr,
-   png_uint_32 size));
-extern PNG_EXPORT(void,png_debug_free) PNGARG((png_structp png_ptr,
-   png_voidp ptr));
+png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr,
+    png_alloc_size_t size));
+void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));

 
 png_voidp
 
 png_voidp

-png_debug_malloc(png_structp png_ptr, png_uint_32 size) {
+PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
+{

 
    /* png_malloc has already tested for NULL; png_create_struct calls
 
    /* png_malloc has already tested for NULL; png_create_struct calls

-      png_debug_malloc directly, with png_ptr == NULL which is OK */
+    * png_debug_malloc directly, with png_ptr == NULL which is OK
+    */

 
    if (size == 0)
 
    if (size == 0)

-      return (png_voidp)(NULL);
+      return (NULL);

 
    /* This calls the library allocator twice, once to get the requested
       buffer and once to get a new free list entry. */
    {
 
    /* This calls the library allocator twice, once to get the requested
       buffer and once to get a new free list entry. */
    {

-      memory_infop pinfo = png_malloc_default(png_ptr, sizeof *pinfo);
+      /* Disable malloc_fn and free_fn */
+      memory_infop pinfo;
+      png_set_mem_fn(png_ptr, NULL, NULL, NULL);
+      pinfo = (memory_infop)png_malloc(png_ptr,
+         png_sizeof(*pinfo));

       pinfo->size = size;
       current_allocation += size;
       pinfo->size = size;
       current_allocation += size;

+      total_allocation += size;
+      num_allocations ++;
+

       if (current_allocation > maximum_allocation)
          maximum_allocation = current_allocation;
       if (current_allocation > maximum_allocation)
          maximum_allocation = current_allocation;

-      pinfo->pointer = png_malloc_default(png_ptr, size);
+
+      pinfo->pointer = png_malloc(png_ptr, size);
+      /* Restore malloc_fn and free_fn */
+
+      png_set_mem_fn(png_ptr,
+          NULL, png_debug_malloc, png_debug_free);
+
+      if (size != 0 && pinfo->pointer == NULL)
+      {
+         current_allocation -= size;
+         total_allocation -= size;
+         png_error(png_ptr,
+           "out of memory in pngtest->png_debug_malloc");
+      }
+

       pinfo->next = pinformation;
       pinformation = pinfo;
       /* Make sure the caller isn't assuming zeroed memory. */
       png_memset(pinfo->pointer, 0xdd, pinfo->size);
       pinfo->next = pinformation;
       pinformation = pinfo;
       /* Make sure the caller isn't assuming zeroed memory. */
       png_memset(pinfo->pointer, 0xdd, pinfo->size);

+
+      if (verbose)
+         printf("png_malloc %lu bytes at %p\n", (unsigned long)size,
+            pinfo->pointer);
+

       return (png_voidp)(pinfo->pointer);
    }
 }
 
 /* Free a pointer.  It is removed from the list at the same time. */
       return (png_voidp)(pinfo->pointer);
    }
 }
 
 /* Free a pointer.  It is removed from the list at the same time. */

-void
+void PNGCBAPI

 png_debug_free(png_structp png_ptr, png_voidp ptr)
 {
    if (png_ptr == NULL)
       fprintf(STDERR, "NULL pointer to png_debug_free.\n");
 png_debug_free(png_structp png_ptr, png_voidp ptr)
 {
    if (png_ptr == NULL)
       fprintf(STDERR, "NULL pointer to png_debug_free.\n");

-   if (ptr == 0) {
+
+   if (ptr == 0)
+   {

 #if 0 /* This happens all the time. */
       fprintf(STDERR, "WARNING: freeing NULL pointer\n");
 #endif
 #if 0 /* This happens all the time. */
       fprintf(STDERR, "WARNING: freeing NULL pointer\n");
 #endif


@@ -432,52 +649,146 @@ png_debug_free(png_structp png_ptr, png_voidp ptr)
    /* Unlink the element from the list. */
    {
       memory_infop FAR *ppinfo = &pinformation;
    /* Unlink the element from the list. */
    {
       memory_infop FAR *ppinfo = &pinformation;

-      for (;;) {
+
+      for (;;)
+      {

          memory_infop pinfo = *ppinfo;
          memory_infop pinfo = *ppinfo;

-         if (pinfo->pointer == ptr) {
+
+         if (pinfo->pointer == ptr)
+         {

             *ppinfo = pinfo->next;
             current_allocation -= pinfo->size;
             if (current_allocation < 0)
                fprintf(STDERR, "Duplicate free of memory\n");
             /* We must free the list element too, but first kill
                the memory that is to be freed. */
             *ppinfo = pinfo->next;
             current_allocation -= pinfo->size;
             if (current_allocation < 0)
                fprintf(STDERR, "Duplicate free of memory\n");
             /* We must free the list element too, but first kill
                the memory that is to be freed. */

-            memset(ptr, 0x55, pinfo->size);
+            png_memset(ptr, 0x55, pinfo->size);

             png_free_default(png_ptr, pinfo);
             png_free_default(png_ptr, pinfo);

+            pinfo = NULL;

             break;
          }
             break;
          }

-         if (pinfo->next == NULL) {
-            fprintf(STDERR, "Pointer %x not found\n", ptr);
+
+         if (pinfo->next == NULL)
+         {
+            fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);

             break;
          }
             break;
          }

+

          ppinfo = &pinfo->next;
       }
    }
 
    /* Finally free the data. */
          ppinfo = &pinfo->next;
       }
    }
 
    /* Finally free the data. */

+   if (verbose)
+      printf("Freeing %p\n", ptr);
+

    png_free_default(png_ptr, ptr);
    png_free_default(png_ptr, ptr);

+   ptr = NULL;

 }
 }

-#endif /* PNG_USER_MEM_SUPPORTED */
+#endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */

 /* END of code to test memory allocation/deallocation */
 
 /* END of code to test memory allocation/deallocation */
 

+
+/* Demonstration of user chunk support of the sTER and vpAg chunks */
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+
+/* (sTER is a public chunk not yet known by libpng.  vpAg is a private
+chunk used in ImageMagick to store "virtual page" size).  */
+
+static png_uint_32 user_chunk_data[4];
+
+    /* 0: sTER mode + 1
+     * 1: vpAg width
+     * 2: vpAg height
+     * 3: vpAg units
+     */
+
+static int PNGCBAPI read_user_chunk_callback(png_struct *png_ptr,
+   png_unknown_chunkp chunk)
+{
+   png_uint_32
+     *my_user_chunk_data;
+
+   /* Return one of the following:
+    *    return (-n);  chunk had an error
+    *    return (0);  did not recognize
+    *    return (n);  success
+    *
+    * The unknown chunk structure contains the chunk data:
+    * png_byte name[5];
+    * png_byte *data;
+    * png_size_t size;
+    *
+    * Note that libpng has already taken care of the CRC handling.
+    */
+
+   if (chunk->name[0] == 115 && chunk->name[1] ==  84 &&     /* s  T */
+       chunk->name[2] ==  69 && chunk->name[3] ==  82)       /* E  R */
+      {
+         /* Found sTER chunk */
+         if (chunk->size != 1)
+            return (-1); /* Error return */
+
+         if (chunk->data[0] != 0 && chunk->data[0] != 1)
+            return (-1);  /* Invalid mode */
+
+         my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
+         my_user_chunk_data[0]=chunk->data[0]+1;
+         return (1);
+      }
+
+   if (chunk->name[0] != 118 || chunk->name[1] != 112 ||    /* v  p */
+       chunk->name[2] !=  65 || chunk->name[3] != 103)      /* A  g */
+      return (0); /* Did not recognize */
+
+   /* Found ImageMagick vpAg chunk */
+
+   if (chunk->size != 9)
+      return (-1); /* Error return */
+
+   my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
+
+   my_user_chunk_data[1]=png_get_uint_31(png_ptr, chunk->data);
+   my_user_chunk_data[2]=png_get_uint_31(png_ptr, chunk->data + 4);
+   my_user_chunk_data[3]=(png_uint_32)chunk->data[8];
+
+   return (1);
+
+}
+#endif
+/* END of code to demonstrate user chunk support */
+

 /* Test one file */
 int
 test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 {
 /* Test one file */
 int
 test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 {

-   static FILE *fpin, *fpout;  /* "static" prevents setjmp corruption */
-   png_structp read_ptr, write_ptr;
-   png_infop read_info_ptr, write_info_ptr, end_info_ptr;
+   static png_FILE_p fpin;
+   static png_FILE_p fpout;  /* "static" prevents setjmp corruption */
+   png_structp read_ptr;
+   png_infop read_info_ptr, end_info_ptr;
+#ifdef PNG_WRITE_SUPPORTED
+   png_structp write_ptr;
+   png_infop write_info_ptr;
+   png_infop write_end_info_ptr;
+#else
+   png_structp write_ptr = NULL;
+   png_infop write_info_ptr = NULL;
+   png_infop write_end_info_ptr = NULL;
+#endif

    png_bytep row_buf;
    png_uint_32 y;
    png_uint_32 width, height;
    int num_pass, pass;
    int bit_depth, color_type;
    png_bytep row_buf;
    png_uint_32 y;
    png_uint_32 width, height;
    int num_pass, pass;
    int bit_depth, color_type;

+#ifdef PNG_SETJMP_SUPPORTED

 #ifdef USE_FAR_KEYWORD
 #ifdef USE_FAR_KEYWORD

-   jmp_buf jmpbuf;
-#endif   
+   jmp_buf tmp_jmpbuf;
+#endif
+#endif

 
    char inbuf[256], outbuf[256];
 
 
    char inbuf[256], outbuf[256];
 

-   row_buf = (png_bytep)NULL;
+   row_buf = NULL;

 
    if ((fpin = fopen(inname, "rb")) == NULL)
    {
 
    if ((fpin = fopen(inname, "rb")) == NULL)
    {


@@ -488,111 +799,181 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
    if ((fpout = fopen(outname, "wb")) == NULL)
    {
       fprintf(STDERR, "Could not open output file %s\n", outname);
    if ((fpout = fopen(outname, "wb")) == NULL)
    {
       fprintf(STDERR, "Could not open output file %s\n", outname);

-      fclose(fpin);
+      FCLOSE(fpin);

       return (1);
    }
 
       return (1);
    }
 

-   png_debug(0, "Allocating read and write structures\n");
-#ifdef PNG_USER_MEM_SUPPORTED
-   read_ptr = png_create_read_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
-      (png_error_ptr)NULL, (png_error_ptr)NULL, (png_voidp)NULL,
-      (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
+   pngtest_debug("Allocating read and write structures");
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
+   read_ptr =
+      png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
+      NULL, NULL, NULL, png_debug_malloc, png_debug_free);

 #else
 #else

-   read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
-      (png_error_ptr)NULL, (png_error_ptr)NULL);
+   read_ptr =
+      png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);

 #endif
 #endif

-#if defined(PNG_NO_STDIO)
-   png_set_error_fn(read_ptr, (png_voidp)inname, png_default_error,
-       png_default_warning);
+#ifndef PNG_STDIO_SUPPORTED
+   png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
+       pngtest_warning);

 #endif
 #endif

-#ifdef PNG_USER_MEM_SUPPORTED
-   write_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
-      (png_error_ptr)NULL, (png_error_ptr)NULL, (png_voidp)NULL,
-      (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
+
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+   user_chunk_data[0] = 0;
+   user_chunk_data[1] = 0;
+   user_chunk_data[2] = 0;
+   user_chunk_data[3] = 0;
+   png_set_read_user_chunk_fn(read_ptr, user_chunk_data,
+     read_user_chunk_callback);
+
+#endif
+#ifdef PNG_WRITE_SUPPORTED
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
+   write_ptr =
+      png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
+      NULL, NULL, NULL, png_debug_malloc, png_debug_free);

 #else
 #else

-   write_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
-      (png_error_ptr)NULL, (png_error_ptr)NULL);
+   write_ptr =
+      png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+#endif
+#ifndef PNG_STDIO_SUPPORTED
+   png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
+       pngtest_warning);

 #endif
 #endif

-#if defined(PNG_NO_STDIO)
-   png_set_error_fn(write_ptr, (png_voidp)inname, png_default_error,
-       png_default_warning);

 #endif
 #endif

-   png_debug(0, "Allocating read_info, write_info and end_info structures\n");
+   pngtest_debug("Allocating read_info, write_info and end_info structures");

    read_info_ptr = png_create_info_struct(read_ptr);
    read_info_ptr = png_create_info_struct(read_ptr);

-   write_info_ptr = png_create_info_struct(write_ptr);

    end_info_ptr = png_create_info_struct(read_ptr);
    end_info_ptr = png_create_info_struct(read_ptr);

-#ifdef PNG_USER_MEM_SUPPORTED
+#ifdef PNG_WRITE_SUPPORTED
+   write_info_ptr = png_create_info_struct(write_ptr);
+   write_end_info_ptr = png_create_info_struct(write_ptr);

 #endif
 
 #endif
 

-   png_debug(0, "Setting jmpbuf for read struct\n");
+#ifdef PNG_SETJMP_SUPPORTED
+   pngtest_debug("Setting jmpbuf for read struct");

 #ifdef USE_FAR_KEYWORD
 #ifdef USE_FAR_KEYWORD

-   if (setjmp(jmpbuf))
+   if (setjmp(tmp_jmpbuf))

 #else
 #else

-   if (setjmp(read_ptr->jmpbuf))
+   if (setjmp(png_jmpbuf(read_ptr)))

 #endif
    {
       fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
 #endif
    {
       fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);

+      png_free(read_ptr, row_buf);
+      row_buf = NULL;

       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);

+#ifdef PNG_WRITE_SUPPORTED
+      png_destroy_info_struct(write_ptr, &write_end_info_ptr);

       png_destroy_write_struct(&write_ptr, &write_info_ptr);
       png_destroy_write_struct(&write_ptr, &write_info_ptr);

-      fclose(fpin);
-      fclose(fpout);
+#endif
+      FCLOSE(fpin);
+      FCLOSE(fpout);

       return (1);
    }
 #ifdef USE_FAR_KEYWORD
       return (1);
    }
 #ifdef USE_FAR_KEYWORD

-   png_memcpy(read_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
+   png_memcpy(png_jmpbuf(read_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));

 #endif
 
 #endif
 

-   png_debug(0, "Setting jmpbuf for write struct\n");
+#ifdef PNG_WRITE_SUPPORTED
+   pngtest_debug("Setting jmpbuf for write struct");

 #ifdef USE_FAR_KEYWORD
 #ifdef USE_FAR_KEYWORD

-   if (setjmp(jmpbuf))
+
+   if (setjmp(tmp_jmpbuf))

 #else
 #else

-   if (setjmp(write_ptr->jmpbuf))
+   if (setjmp(png_jmpbuf(write_ptr)))

 #endif
    {
       fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
 #endif
    {
       fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
       png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);

+      png_destroy_info_struct(write_ptr, &write_end_info_ptr);
+#ifdef PNG_WRITE_SUPPORTED

       png_destroy_write_struct(&write_ptr, &write_info_ptr);
       png_destroy_write_struct(&write_ptr, &write_info_ptr);

-      fclose(fpin);
-      fclose(fpout);
+#endif
+      FCLOSE(fpin);
+      FCLOSE(fpout);

       return (1);
    }
       return (1);
    }

+

 #ifdef USE_FAR_KEYWORD
 #ifdef USE_FAR_KEYWORD

-   png_memcpy(write_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf));
+   png_memcpy(png_jmpbuf(write_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
+#endif
+#endif

 #endif
 
 #endif
 

-   png_debug(0, "Initializing input and output streams\n");
-#if !defined(PNG_NO_STDIO)
+   pngtest_debug("Initializing input and output streams");
+#ifdef PNG_STDIO_SUPPORTED

    png_init_io(read_ptr, fpin);
    png_init_io(read_ptr, fpin);

+#  ifdef PNG_WRITE_SUPPORTED

    png_init_io(write_ptr, fpout);
    png_init_io(write_ptr, fpout);

+#  endif

 #else
 #else

-   png_set_read_fn(read_ptr, (png_voidp)fpin, png_default_read_data);
-   png_set_write_fn(write_ptr, (png_voidp)fpout,  png_default_write_data,
-#if defined(PNG_WRITE_FLUSH_SUPPORTED)
-      png_default_flush);
-#else
+   png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
+#  ifdef PNG_WRITE_SUPPORTED
+   png_set_write_fn(write_ptr, (png_voidp)fpout,  pngtest_write_data,
+#    ifdef PNG_WRITE_FLUSH_SUPPORTED
+      pngtest_flush);
+#    else

       NULL);
       NULL);

+#    endif
+#  endif

 #endif
 #endif

+
+#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
+   /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
+    * This is here just to make pngtest replicate the results from libpng
+    * versions prior to 1.5.4, and to test this new API.
+    */
+   png_set_text_compression_strategy(write_ptr, Z_FILTERED);

 #endif
 #endif

-   if(status_dots_requested == 1)
+
+   if (status_dots_requested == 1)

    {
    {

+#ifdef PNG_WRITE_SUPPORTED

       png_set_write_status_fn(write_ptr, write_row_callback);
       png_set_write_status_fn(write_ptr, write_row_callback);

+#endif

       png_set_read_status_fn(read_ptr, read_row_callback);
    }
       png_set_read_status_fn(read_ptr, read_row_callback);
    }

+

    else
    {
    else
    {

+#ifdef PNG_WRITE_SUPPORTED

       png_set_write_status_fn(write_ptr, NULL);
       png_set_write_status_fn(write_ptr, NULL);

+#endif

       png_set_read_status_fn(read_ptr, NULL);
    }
 
       png_set_read_status_fn(read_ptr, NULL);
    }
 

-#  if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-     zero_samples=0;
-     png_set_write_user_transform_fn(write_ptr, count_zero_samples);
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+   {
+      int i;
+
+      for (i = 0; i<256; i++)
+         filters_used[i] = 0;
+
+      png_set_read_user_transform_fn(read_ptr, count_filters);
+   }
+#endif
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+   zero_samples = 0;
+   png_set_write_user_transform_fn(write_ptr, count_zero_samples);
+#endif
+
+#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
+#  ifndef PNG_HANDLE_CHUNK_ALWAYS
+#    define PNG_HANDLE_CHUNK_ALWAYS       3

 #  endif
 #  endif

+   png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
+      NULL, 0);
+#endif
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+#  ifndef PNG_HANDLE_CHUNK_IF_SAFE
+#    define PNG_HANDLE_CHUNK_IF_SAFE      2
+#  endif
+   png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_IF_SAFE,
+      NULL, 0);
+#endif

 
 

-   png_debug(0, "Reading info struct\n");
+   pngtest_debug("Reading info struct");

    png_read_info(read_ptr, read_info_ptr);
 
    png_read_info(read_ptr, read_info_ptr);
 

-   png_debug(0, "Transferring info struct\n");
+   pngtest_debug("Transferring info struct");

    {
       int interlace_type, compression_type, filter_type;
 
    {
       int interlace_type, compression_type, filter_type;
 


@@ -600,26 +981,41 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
           &color_type, &interlace_type, &compression_type, &filter_type))
       {
          png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
           &color_type, &interlace_type, &compression_type, &filter_type))
       {
          png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,

-#if defined(PNG_WRITE_INTERLACING_SUPPORTED)
+#ifdef PNG_WRITE_INTERLACING_SUPPORTED

             color_type, interlace_type, compression_type, filter_type);
 #else
             color_type, PNG_INTERLACE_NONE, compression_type, filter_type);
 #endif
       }
    }
             color_type, interlace_type, compression_type, filter_type);
 #else
             color_type, PNG_INTERLACE_NONE, compression_type, filter_type);
 #endif
       }
    }

-#if defined(PNG_READ_bKGD_SUPPORTED) && defined(PNG_WRITE_bKGD_SUPPORTED)
+#ifdef PNG_FIXED_POINT_SUPPORTED
+#ifdef PNG_cHRM_SUPPORTED

    {
    {

-      png_color_16p background;
+      png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
+         blue_y;

 
 

-      if (png_get_bKGD(read_ptr, read_info_ptr, &background))
+      if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
+         &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y))

       {
       {

-         png_set_bKGD(write_ptr, write_info_ptr, background);
+         png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
+            red_y, green_x, green_y, blue_x, blue_y);

       }
    }
 #endif
       }
    }
 #endif

-#if defined(PNG_READ_cHRM_SUPPORTED) && defined(PNG_WRITE_cHRM_SUPPORTED)
+#ifdef PNG_gAMA_SUPPORTED
+   {
+      png_fixed_point gamma;
+
+      if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma))
+         png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
+   }
+#endif
+#else /* Use floating point versions */
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+#ifdef PNG_cHRM_SUPPORTED

    {
    {

-      double white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
+      double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
+         blue_y;

 
       if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
          &red_y, &green_x, &green_y, &blue_x, &blue_y))
 
       if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
          &red_y, &green_x, &green_y, &blue_x, &blue_y))


@@ -629,48 +1025,77 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       }
    }
 #endif
       }
    }
 #endif

-#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_WRITE_gAMA_SUPPORTED)
+#ifdef PNG_gAMA_SUPPORTED

    {
       double gamma;
 
       if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))
    {
       double gamma;
 
       if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))

-      {

          png_set_gAMA(write_ptr, write_info_ptr, gamma);
          png_set_gAMA(write_ptr, write_info_ptr, gamma);

+   }
+#endif
+#endif /* Floating point */
+#endif /* Fixed point */
+#ifdef PNG_iCCP_SUPPORTED
+   {
+      png_charp name;
+      png_bytep profile;
+      png_uint_32 proflen;
+      int compression_type;
+
+      if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
+                      &profile, &proflen))
+      {
+         png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
+                      profile, proflen);

       }
    }
 #endif
       }
    }
 #endif

-#if defined(PNG_READ_sRGB_SUPPORTED) && defined(PNG_WRITE_sRGB_SUPPORTED)
+#ifdef PNG_sRGB_SUPPORTED

    {
       int intent;
 
       if (png_get_sRGB(read_ptr, read_info_ptr, &intent))
    {
       int intent;
 
       if (png_get_sRGB(read_ptr, read_info_ptr, &intent))

-      {

          png_set_sRGB(write_ptr, write_info_ptr, intent);
          png_set_sRGB(write_ptr, write_info_ptr, intent);

+   }
+#endif
+   {
+      png_colorp palette;
+      int num_palette;
+
+      if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
+         png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
+   }
+#ifdef PNG_bKGD_SUPPORTED
+   {
+      png_color_16p background;
+
+      if (png_get_bKGD(read_ptr, read_info_ptr, &background))
+      {
+         png_set_bKGD(write_ptr, write_info_ptr, background);

       }
    }
 #endif
       }
    }
 #endif

-#if defined(PNG_READ_hIST_SUPPORTED) && defined(PNG_WRITE_hIST_SUPPORTED)
+#ifdef PNG_hIST_SUPPORTED

    {
       png_uint_16p hist;
 
       if (png_get_hIST(read_ptr, read_info_ptr, &hist))
    {
       png_uint_16p hist;
 
       if (png_get_hIST(read_ptr, read_info_ptr, &hist))

-      {

          png_set_hIST(write_ptr, write_info_ptr, hist);
          png_set_hIST(write_ptr, write_info_ptr, hist);

-      }

    }
 #endif
    }
 #endif

-#if defined(PNG_READ_oFFs_SUPPORTED) && defined(PNG_WRITE_oFFs_SUPPORTED)
+#ifdef PNG_oFFs_SUPPORTED

    {
    {

-      png_uint_32 offset_x, offset_y;
+      png_int_32 offset_x, offset_y;

       int unit_type;
 
       int unit_type;
 

-      if (png_get_oFFs(read_ptr, read_info_ptr,&offset_x,&offset_y,&unit_type))
+      if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
+          &unit_type))

       {
          png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
       }
    }
 #endif
       {
          png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
       }
    }
 #endif

-#if defined(PNG_READ_pCAL_SUPPORTED) && defined(PNG_WRITE_pCAL_SUPPORTED)
+#ifdef PNG_pCAL_SUPPORTED

    {
       png_charp purpose, units;
       png_charpp params;
    {
       png_charp purpose, units;
       png_charpp params;


@@ -685,135 +1110,340 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
       }
    }
 #endif
       }
    }
 #endif

-#if defined(PNG_READ_pHYs_SUPPORTED) && defined(PNG_WRITE_pHYs_SUPPORTED)
+#ifdef PNG_pHYs_SUPPORTED

    {
       png_uint_32 res_x, res_y;
       int unit_type;
 
       if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))
    {
       png_uint_32 res_x, res_y;
       int unit_type;
 
       if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))

-      {

          png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
          png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);

-      }

    }
 #endif
    }
 #endif

+#ifdef PNG_sBIT_SUPPORTED

    {
    {

-      png_colorp palette;
-      int num_palette;
+      png_color_8p sig_bit;

 
 

-      if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
+      if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
+         png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
+   }
+#endif
+#ifdef PNG_sCAL_SUPPORTED
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+   {
+      int unit;
+      double scal_width, scal_height;
+
+      if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
+         &scal_height))

       {
       {

-         png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
+         png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);

       }
    }
       }
    }

-#if defined(PNG_READ_sBIT_SUPPORTED) && defined(PNG_WRITE_sBIT_SUPPORTED)
+#else
+#ifdef PNG_FIXED_POINT_SUPPORTED

    {
    {

-      png_color_8p sig_bit;
+      int unit;
+      png_charp scal_width, scal_height;

 
 

-      if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
+      if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
+          &scal_height))

       {
       {

-         png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
+         png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
+             scal_height);

       }
    }
 #endif
       }
    }
 #endif

-#if (defined(PNG_READ_tEXt_SUPPORTED) && defined(PNG_WRITE_tEXt_SUPPORTED)) || \
-    (defined(PNG_READ_zTXt_SUPPORTED) && defined(PNG_WRITE_zTXt_SUPPORTED))
+#endif
+#endif
+#ifdef PNG_TEXT_SUPPORTED

    {
       png_textp text_ptr;
       int num_text;
 
       if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
       {
    {
       png_textp text_ptr;
       int num_text;
 
       if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
       {

-         png_debug1(0, "Handling %d tEXt/zTXt chunks\n", num_text);
+         pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
+
+         if (verbose)
+            printf("\nText compression=%d\n", text_ptr->compression);
+

          png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
       }
    }
 #endif
          png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
       }
    }
 #endif

-#if defined(PNG_READ_tIME_SUPPORTED) && defined(PNG_WRITE_tIME_SUPPORTED)
+#ifdef PNG_tIME_SUPPORTED

    {
       png_timep mod_time;
 
       if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
       {
          png_set_tIME(write_ptr, write_info_ptr, mod_time);
    {
       png_timep mod_time;
 
       if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
       {
          png_set_tIME(write_ptr, write_info_ptr, mod_time);

-#if defined(PNG_TIME_RFC1123_SUPPORTED)
-         /* we have to use png_strcpy instead of "=" because the string
-            pointed to by png_convert_to_rfc1123() gets free'ed before
-            we use it */
-         png_strcpy(tIME_string,png_convert_to_rfc1123(read_ptr, mod_time));
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+         /* We have to use png_memcpy instead of "=" because the string
+          * pointed to by png_convert_to_rfc1123() gets free'ed before
+          * we use it.
+          */
+         png_memcpy(tIME_string,
+                    png_convert_to_rfc1123(read_ptr, mod_time),
+                    png_sizeof(tIME_string));
+
+         tIME_string[png_sizeof(tIME_string) - 1] = '\0';

          tIME_chunk_present++;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
       }
    }
 #endif
          tIME_chunk_present++;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
       }
    }
 #endif

-#if defined(PNG_READ_tRNS_SUPPORTED) && defined(PNG_WRITE_tRNS_SUPPORTED)
+#ifdef PNG_tRNS_SUPPORTED

    {
    {

-      png_bytep trans;
+      png_bytep trans_alpha;

       int num_trans;
       int num_trans;

-      png_color_16p trans_values;
+      png_color_16p trans_color;

 
 

-      if (png_get_tRNS(read_ptr, read_info_ptr, &trans, &num_trans,
-         &trans_values))
+      if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
+         &trans_color))

       {
       {

-         png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans,
-            trans_values);
+         int sample_max = (1 << bit_depth);
+         /* libpng doesn't reject a tRNS chunk with out-of-range samples */
+         if (!((color_type == PNG_COLOR_TYPE_GRAY &&
+             (int)trans_color->gray > sample_max) ||
+             (color_type == PNG_COLOR_TYPE_RGB &&
+             ((int)trans_color->red > sample_max ||
+             (int)trans_color->green > sample_max ||
+             (int)trans_color->blue > sample_max))))
+            png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
+               trans_color);

       }
    }
 #endif
       }
    }
 #endif

+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+   {
+      png_unknown_chunkp unknowns;
+      int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr,
+         &unknowns);

 
 

-   png_debug(0, "\nWriting info struct\n");
+      if (num_unknowns)
+      {
+         int i;
+         png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
+           num_unknowns);
+         /* Copy the locations from the read_info_ptr.  The automatically
+          * generated locations in write_info_ptr are wrong because we
+          * haven't written anything yet.
+          */
+         for (i = 0; i < num_unknowns; i++)
+           png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
+             unknowns[i].location);
+      }
+   }
+#endif
+
+#ifdef PNG_WRITE_SUPPORTED
+   pngtest_debug("Writing info struct");
+
+/* If we wanted, we could write info in two steps:
+ * png_write_info_before_PLTE(write_ptr, write_info_ptr);
+ */

    png_write_info(write_ptr, write_info_ptr);
 
    png_write_info(write_ptr, write_info_ptr);
 

-   png_debug(0, "\nAllocating row buffer \n");
-   row_buf = (png_bytep)png_malloc(read_ptr,
-      png_get_rowbytes(read_ptr, read_info_ptr));
-   if (row_buf == NULL)
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+   if (user_chunk_data[0] != 0)

    {
    {

-      fprintf(STDERR, "No memory to allocate row buffer\n");
-      png_destroy_read_struct(&read_ptr, &read_info_ptr, (png_infopp)NULL);
-      png_destroy_write_struct(&write_ptr, &write_info_ptr);
-      fclose(fpin);
-      fclose(fpout);
-      return (1);
+      png_byte png_sTER[5] = {115,  84,  69,  82, '\0'};
+
+      unsigned char
+        ster_chunk_data[1];
+
+      if (verbose)
+         fprintf(STDERR, "\n stereo mode = %lu\n",
+           (unsigned long)(user_chunk_data[0] - 1));
+
+      ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1);
+      png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1);

    }
    }

-   png_debug(0, "Writing row data\n");

 
 

+   if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0)
+   {
+      png_byte png_vpAg[5] = {118, 112,  65, 103, '\0'};
+
+      unsigned char
+        vpag_chunk_data[9];
+
+      if (verbose)
+         fprintf(STDERR, " vpAg = %lu x %lu, units = %lu\n",
+           (unsigned long)user_chunk_data[1],
+           (unsigned long)user_chunk_data[2],
+           (unsigned long)user_chunk_data[3]);
+
+      png_save_uint_32(vpag_chunk_data, user_chunk_data[1]);
+      png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]);
+      vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff);
+      png_write_chunk(write_ptr, png_vpAg, vpag_chunk_data, 9);
+   }
+
+#endif
+#endif
+
+#ifdef SINGLE_ROWBUF_ALLOC
+   pngtest_debug("Allocating row buffer...");
+   row_buf = (png_bytep)png_malloc(read_ptr,
+      png_get_rowbytes(read_ptr, read_info_ptr));
+
+   pngtest_debug1("\t0x%08lx", (unsigned long)row_buf);
+#endif /* SINGLE_ROWBUF_ALLOC */
+   pngtest_debug("Writing row data");
+
+#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
+  defined(PNG_WRITE_INTERLACING_SUPPORTED)

    num_pass = png_set_interlace_handling(read_ptr);
    num_pass = png_set_interlace_handling(read_ptr);

+#  ifdef PNG_WRITE_SUPPORTED

    png_set_interlace_handling(write_ptr);
    png_set_interlace_handling(write_ptr);

+#  endif
+#else
+   num_pass = 1;
+#endif

 
 

+#ifdef PNGTEST_TIMING
+   t_stop = (float)clock();
+   t_misc += (t_stop - t_start);
+   t_start = t_stop;
+#endif

    for (pass = 0; pass < num_pass; pass++)
    {
    for (pass = 0; pass < num_pass; pass++)
    {

-      png_debug1(0, "Writing row data for pass %d\n",pass);
+      pngtest_debug1("Writing row data for pass %d", pass);

       for (y = 0; y < height; y++)
       {
       for (y = 0; y < height; y++)
       {

-         png_read_rows(read_ptr, (png_bytepp)&row_buf, (png_bytepp)NULL, 1);
+#ifndef SINGLE_ROWBUF_ALLOC
+         pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
+         row_buf = (png_bytep)png_malloc(read_ptr,
+            png_get_rowbytes(read_ptr, read_info_ptr));
+
+         pngtest_debug2("\t0x%08lx (%u bytes)", (unsigned long)row_buf,
+            png_get_rowbytes(read_ptr, read_info_ptr));
+
+#endif /* !SINGLE_ROWBUF_ALLOC */
+         png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
+
+#ifdef PNG_WRITE_SUPPORTED
+#ifdef PNGTEST_TIMING
+         t_stop = (float)clock();
+         t_decode += (t_stop - t_start);
+         t_start = t_stop;
+#endif

          png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
          png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);

+#ifdef PNGTEST_TIMING
+         t_stop = (float)clock();
+         t_encode += (t_stop - t_start);
+         t_start = t_stop;
+#endif
+#endif /* PNG_WRITE_SUPPORTED */
+
+#ifndef SINGLE_ROWBUF_ALLOC
+         pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
+         png_free(read_ptr, row_buf);
+         row_buf = NULL;
+#endif /* !SINGLE_ROWBUF_ALLOC */

       }
    }
 
       }
    }
 

-   png_debug(0, "Reading and writing end_info data\n");
+#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
+   png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
+#endif
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+   png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
+#endif
+
+   pngtest_debug("Reading and writing end_info data");
+

    png_read_end(read_ptr, end_info_ptr);
    png_read_end(read_ptr, end_info_ptr);

-   png_write_end(write_ptr, end_info_ptr);
+#ifdef PNG_TEXT_SUPPORTED
+   {
+      png_textp text_ptr;
+      int num_text;
+
+      if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
+      {
+         pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
+         png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
+      }
+   }
+#endif
+#ifdef PNG_tIME_SUPPORTED
+   {
+      png_timep mod_time;
+
+      if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
+      {
+         png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+         /* We have to use png_memcpy instead of "=" because the string
+            pointed to by png_convert_to_rfc1123() gets free'ed before
+            we use it */
+         png_memcpy(tIME_string,
+                    png_convert_to_rfc1123(read_ptr, mod_time),
+                    png_sizeof(tIME_string));
+
+         tIME_string[png_sizeof(tIME_string) - 1] = '\0';
+         tIME_chunk_present++;
+#endif /* PNG_TIME_RFC1123_SUPPORTED */
+      }
+   }
+#endif
+#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+   {
+      png_unknown_chunkp unknowns;
+      int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr,
+         &unknowns);
+
+      if (num_unknowns)
+      {
+         int i;
+         png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
+           num_unknowns);
+         /* Copy the locations from the read_info_ptr.  The automatically
+          * generated locations in write_end_info_ptr are wrong because we
+          * haven't written the end_info yet.
+          */
+         for (i = 0; i < num_unknowns; i++)
+           png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
+             unknowns[i].location);
+      }
+   }
+#endif
+#ifdef PNG_WRITE_SUPPORTED
+   png_write_end(write_ptr, write_end_info_ptr);
+#endif

 
 #ifdef PNG_EASY_ACCESS_SUPPORTED
 
 #ifdef PNG_EASY_ACCESS_SUPPORTED

-   if(verbose)
+   if (verbose)

    {
       png_uint_32 iwidth, iheight;
       iwidth = png_get_image_width(write_ptr, write_info_ptr);
       iheight = png_get_image_height(write_ptr, write_info_ptr);
    {
       png_uint_32 iwidth, iheight;
       iwidth = png_get_image_width(write_ptr, write_info_ptr);
       iheight = png_get_image_height(write_ptr, write_info_ptr);

-      fprintf(STDERR, "Image width = %lu, height = %lu\n",
-         iwidth, iheight);
+      fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
+         (unsigned long)iwidth, (unsigned long)iheight);

    }
 #endif
 
    }
 #endif
 

-   png_debug(0, "Destroying data structs\n");
+   pngtest_debug("Destroying data structs");
+#ifdef SINGLE_ROWBUF_ALLOC
+   pngtest_debug("destroying row_buf for read_ptr");

    png_free(read_ptr, row_buf);
    png_free(read_ptr, row_buf);

+   row_buf = NULL;
+#endif /* SINGLE_ROWBUF_ALLOC */
+   pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");

    png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
    png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);

+#ifdef PNG_WRITE_SUPPORTED
+   pngtest_debug("destroying write_end_info_ptr");
+   png_destroy_info_struct(write_ptr, &write_end_info_ptr);
+   pngtest_debug("destroying write_ptr, write_info_ptr");

    png_destroy_write_struct(&write_ptr, &write_info_ptr);
    png_destroy_write_struct(&write_ptr, &write_info_ptr);

+#endif
+   pngtest_debug("Destruction complete.");

 
 

-   fclose(fpin);
-   fclose(fpout);
+   FCLOSE(fpin);
+   FCLOSE(fpout);

 
 

-   png_debug(0, "Opening files for comparison\n");
+   pngtest_debug("Opening files for comparison");

    if ((fpin = fopen(inname, "rb")) == NULL)
    {
       fprintf(STDERR, "Could not find file %s\n", inname);
    if ((fpin = fopen(inname, "rb")) == NULL)
    {
       fprintf(STDERR, "Could not find file %s\n", inname);


@@ -823,35 +1453,43 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
    if ((fpout = fopen(outname, "rb")) == NULL)
    {
       fprintf(STDERR, "Could not find file %s\n", outname);
    if ((fpout = fopen(outname, "rb")) == NULL)
    {
       fprintf(STDERR, "Could not find file %s\n", outname);

-      fclose(fpin);
+      FCLOSE(fpin);

       return (1);
    }
 
       return (1);
    }
 

-   for(;;)
+   for (;;)

    {
       png_size_t num_in, num_out;
 
    {
       png_size_t num_in, num_out;
 

-      num_in = fread(inbuf, 1, 1, fpin);
-      num_out = fread(outbuf, 1, 1, fpout);
+         num_in = fread(inbuf, 1, 1, fpin);
+         num_out = fread(outbuf, 1, 1, fpout);

 
       if (num_in != num_out)
       {
 
       if (num_in != num_out)
       {

-         fprintf(STDERR, "Files %s and %s are of a different size\n",
+         fprintf(STDERR, "\nFiles %s and %s are of a different size\n",

                  inname, outname);
                  inname, outname);

-         if(wrote_question == 0)
+
+         if (wrote_question == 0)

          {
             fprintf(STDERR,
          {
             fprintf(STDERR,

-              "   Was %s written with the same chunk size (8k),",inname);
+         "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
+              inname, PNG_ZBUF_SIZE);

             fprintf(STDERR,
             fprintf(STDERR,

-              " filtering\n   heuristic (libpng default), compression");
+              "\n   filtering heuristic (libpng default), compression");

             fprintf(STDERR,
             fprintf(STDERR,

-              " level (zlib default)\n   and zlib version (%s)?\n\n",
+              " level (zlib default),\n   and zlib version (%s)?\n\n",

               ZLIB_VERSION);
               ZLIB_VERSION);

-            wrote_question=1;
+            wrote_question = 1;

          }
          }

-         fclose(fpin);
-         fclose(fpout);
-         return (0);
+
+         FCLOSE(fpin);
+         FCLOSE(fpout);
+
+         if (strict != 0)
+           return (1);
+
+         else
+           return (0);

       }
 
       if (!num_in)
       }
 
       if (!num_in)


@@ -859,34 +1497,42 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 
       if (png_memcmp(inbuf, outbuf, num_in))
       {
 
       if (png_memcmp(inbuf, outbuf, num_in))
       {

-         fprintf(STDERR, "Files %s and %s are different\n", inname, outname);
-         if(wrote_question == 0)
+         fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
+
+         if (wrote_question == 0)

          {
             fprintf(STDERR,
          {
             fprintf(STDERR,

-              "   Was %s written with the same chunk size (8k),",inname);
+         "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
+                 inname, PNG_ZBUF_SIZE);

             fprintf(STDERR,
             fprintf(STDERR,

-              " filtering\n   heuristic (libpng default), compression");
+              "\n   filtering heuristic (libpng default), compression");

             fprintf(STDERR,
             fprintf(STDERR,

-              " level (zlib default)\n   and zlib version (%s)?\n\n",
+              " level (zlib default),\n   and zlib version (%s)?\n\n",

               ZLIB_VERSION);
               ZLIB_VERSION);

-            wrote_question=1;
+            wrote_question = 1;

          }
          }

-         fclose(fpin);
-         fclose(fpout);
-         return (0);
+
+         FCLOSE(fpin);
+         FCLOSE(fpout);
+
+         if (strict != 0)
+           return (1);
+
+         else
+           return (0);

       }
    }
 
       }
    }
 

-   fclose(fpin);
-   fclose(fpout);
+   FCLOSE(fpin);
+   FCLOSE(fpout);

 
    return (0);
 }
 
 
    return (0);
 }
 

-/* input and output filenames */
+/* Input and output filenames */

 #ifdef RISCOS
 #ifdef RISCOS

-PNG_CONST char *inname = "pngtest/png";
-PNG_CONST char *outname = "pngout/png";
+static PNG_CONST char *inname = "pngtest/png";
+static PNG_CONST char *outname = "pngout/png";

 #else
 static PNG_CONST char *inname = "pngtest.png";
 static PNG_CONST char *outname = "pngout.png";
 #else
 static PNG_CONST char *inname = "pngtest.png";
 static PNG_CONST char *outname = "pngout.png";


@@ -898,14 +1544,23 @@ main(int argc, char *argv[])
    int multiple = 0;
    int ierror = 0;
 
    int multiple = 0;
    int ierror = 0;
 

-   fprintf(STDERR, "Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
+   fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);

    fprintf(STDERR, "   with zlib   version %s\n", ZLIB_VERSION);
    fprintf(STDERR, "   with zlib   version %s\n", ZLIB_VERSION);

-   fprintf(STDERR,"%s",png_get_copyright(NULL));
+   fprintf(STDERR, "%s", png_get_copyright(NULL));
+   /* Show the version of libpng used in building the library */
+   fprintf(STDERR, " library (%lu):%s",
+      (unsigned long)png_access_version_number(),
+      png_get_header_version(NULL));
+
+   /* Show the version of libpng used in building the application */
+   fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
+      PNG_HEADER_VERSION_STRING);

 
    /* Do some consistency checking on the memory allocation settings, I'm
 
    /* Do some consistency checking on the memory allocation settings, I'm

-      not sure this matters, but it is nice to know, the first of these
-      tests should be impossible because of the way the macros are set
-      in pngconf.h */
+    * not sure this matters, but it is nice to know, the first of these
+    * tests should be impossible because of the way the macros are set
+    * in pngconf.h
+    */

 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
       fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
 #endif
 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
       fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
 #endif


@@ -930,6 +1585,7 @@ main(int argc, char *argv[])
          multiple = 1;
          status_dots_requested = 0;
       }
          multiple = 1;
          status_dots_requested = 0;
       }

+

       else if (strcmp(argv[1], "-mv") == 0 ||
                strcmp(argv[1], "-vm") == 0 )
       {
       else if (strcmp(argv[1], "-mv") == 0 ||
                strcmp(argv[1], "-vm") == 0 )
       {


@@ -937,12 +1593,22 @@ main(int argc, char *argv[])
          verbose = 1;
          status_dots_requested = 1;
       }
          verbose = 1;
          status_dots_requested = 1;
       }

+

       else if (strcmp(argv[1], "-v") == 0)
       {
          verbose = 1;
          status_dots_requested = 1;
          inname = argv[2];
       }
       else if (strcmp(argv[1], "-v") == 0)
       {
          verbose = 1;
          status_dots_requested = 1;
          inname = argv[2];
       }

+
+      else if (strcmp(argv[1], "--strict") == 0)
+      {
+         status_dots_requested = 0;
+         verbose = 1;
+         inname = argv[2];
+         strict++;
+      }
+

       else
       {
          inname = argv[1];
       else
       {
          inname = argv[1];


@@ -950,10 +1616,10 @@ main(int argc, char *argv[])
       }
    }
 
       }
    }
 

-   if (!multiple && argc == 3+verbose)
-     outname = argv[2+verbose];
+   if (!multiple && argc == 3 + verbose)
+     outname = argv[2 + verbose];

 
 

-   if ((!multiple && argc > 3+verbose) || (multiple && argc < 2))
+   if ((!multiple && argc > 3 + verbose) || (multiple && argc < 2))

    {
      fprintf(STDERR,
        "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
    {
      fprintf(STDERR,
        "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",


@@ -968,114 +1634,187 @@ main(int argc, char *argv[])
    if (multiple)
    {
       int i;
    if (multiple)
    {
       int i;

-#ifdef PNG_USER_MEM_SUPPORTED
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG

       int allocation_now = current_allocation;
 #endif
       for (i=2; i<argc; ++i)
       {
          int kerror;
       int allocation_now = current_allocation;
 #endif
       for (i=2; i<argc; ++i)
       {
          int kerror;

-         fprintf(STDERR, "Testing %s:",argv[i]);
+         fprintf(STDERR, "\n Testing %s:", argv[i]);

          kerror = test_one_file(argv[i], outname);
          if (kerror == 0)
          {
          kerror = test_one_file(argv[i], outname);
          if (kerror == 0)
          {

-#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-            fprintf(STDERR, " PASS (%lu zero samples)\n",zero_samples);
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+            int k;
+#endif
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+            fprintf(STDERR, "\n PASS (%lu zero samples)\n",
+               (unsigned long)zero_samples);

 #else
             fprintf(STDERR, " PASS\n");
 #endif
 #else
             fprintf(STDERR, " PASS\n");
 #endif

-#if defined(PNG_TIME_RFC1123_SUPPORTED)
-         if(tIME_chunk_present != 0)
-            fprintf(STDERR, " tIME = %s\n",tIME_string);
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+            for (k = 0; k<256; k++)
+               if (filters_used[k])
+                  fprintf(STDERR, " Filter %d was used %lu times\n",
+                     k, (unsigned long)filters_used[k]);
+#endif
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+         if (tIME_chunk_present != 0)
+            fprintf(STDERR, " tIME = %s\n", tIME_string);
+

          tIME_chunk_present = 0;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
          }
          tIME_chunk_present = 0;
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
          }

+

          else
          {
             fprintf(STDERR, " FAIL\n");
             ierror += kerror;
          }
          else
          {
             fprintf(STDERR, " FAIL\n");
             ierror += kerror;
          }

-#ifdef PNG_USER_MEM_SUPPORTED
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG

          if (allocation_now != current_allocation)
             fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
          if (allocation_now != current_allocation)
             fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",

-               current_allocation-allocation_now);
-         if (current_allocation != 0) {
+               current_allocation - allocation_now);
+
+         if (current_allocation != 0)
+         {

             memory_infop pinfo = pinformation;
 
             fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
                current_allocation);
             memory_infop pinfo = pinformation;
 
             fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
                current_allocation);

-            while (pinfo != NULL) {
-               fprintf(STDERR, " %d bytes at %x\n", pinfo->size, pinfo->pointer);
+
+            while (pinfo != NULL)
+            {
+               fprintf(STDERR, " %lu bytes at %x\n",
+                 (unsigned long)pinfo->size,
+                 (unsigned int)pinfo->pointer);

                pinfo = pinfo->next;
                pinfo = pinfo->next;

-               }
+            }

          }
 #endif
       }
          }
 #endif
       }

-#ifdef PNG_USER_MEM_SUPPORTED
-         fprintf(STDERR, "Maximum memory allocation: %d bytes\n",
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
+         fprintf(STDERR, " Current memory allocation: %10d bytes\n",
+            current_allocation);
+         fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",

             maximum_allocation);
             maximum_allocation);

+         fprintf(STDERR, " Total   memory allocation: %10d bytes\n",
+            total_allocation);
+         fprintf(STDERR, "     Number of allocations: %10d\n",
+            num_allocations);

 #endif
    }
 #endif
    }

+

    else
    {
       int i;
    else
    {
       int i;

-      for (i=0; i<3; ++i) {
+      for (i = 0; i<3; ++i)
+      {

          int kerror;
          int kerror;

-#ifdef PNG_USER_MEM_SUPPORTED
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG

          int allocation_now = current_allocation;
 #endif
          int allocation_now = current_allocation;
 #endif

-         if (i == 1) status_dots_requested = 1;
-         else if(verbose == 0)status_dots_requested = 0;
+         if (i == 1)
+            status_dots_requested = 1;
+
+         else if (verbose == 0)
+            status_dots_requested = 0;
+

          if (i == 0 || verbose == 1 || ierror != 0)
          if (i == 0 || verbose == 1 || ierror != 0)

-            fprintf(STDERR, "Testing %s:",inname);
+            fprintf(STDERR, "\n Testing %s:", inname);
+

          kerror = test_one_file(inname, outname);
          kerror = test_one_file(inname, outname);

-         if(kerror == 0)
+
+         if (kerror == 0)

          {
          {

-            if(verbose == 1 || i == 2)
+            if (verbose == 1 || i == 2)

             {
             {

-#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-                fprintf(STDERR, " PASS (%lu zero samples)\n",zero_samples);
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+                int k;
+#endif
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+                fprintf(STDERR, "\n PASS (%lu zero samples)\n",
+                   (unsigned long)zero_samples);

 #else
                 fprintf(STDERR, " PASS\n");
 #endif
 #else
                 fprintf(STDERR, " PASS\n");
 #endif

-#if defined(PNG_TIME_RFC1123_SUPPORTED)
-         if(tIME_chunk_present != 0)
-            fprintf(STDERR, " tIME = %s\n",tIME_string);
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+                for (k = 0; k<256; k++)
+                   if (filters_used[k])
+                      fprintf(STDERR, " Filter %d was used %lu times\n",
+                         k, (unsigned long)filters_used[k]);
+#endif
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+             if (tIME_chunk_present != 0)
+                fprintf(STDERR, " tIME = %s\n", tIME_string);

 #endif /* PNG_TIME_RFC1123_SUPPORTED */
             }
          }
 #endif /* PNG_TIME_RFC1123_SUPPORTED */
             }
          }

+

          else
          {
          else
          {

-            if(verbose == 0 && i != 2)
-               fprintf(STDERR, "Testing %s:",inname);
+            if (verbose == 0 && i != 2)
+               fprintf(STDERR, "\n Testing %s:", inname);
+

             fprintf(STDERR, " FAIL\n");
             ierror += kerror;
          }
             fprintf(STDERR, " FAIL\n");
             ierror += kerror;
          }

-#ifdef PNG_USER_MEM_SUPPORTED
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG

          if (allocation_now != current_allocation)
              fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
          if (allocation_now != current_allocation)
              fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",

-               current_allocation-allocation_now);
-         if (current_allocation != 0) {
+               current_allocation - allocation_now);
+
+         if (current_allocation != 0)
+         {

              memory_infop pinfo = pinformation;
 
              fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
                 current_allocation);
              memory_infop pinfo = pinformation;
 
              fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
                 current_allocation);

-             while (pinfo != NULL) {
-                fprintf(STDERR, " %d bytes at %x\n", pinfo->size, pinfo->pointer);
+
+             while (pinfo != NULL)
+             {
+                fprintf(STDERR, " %lu bytes at %x\n",
+                   (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);

                 pinfo = pinfo->next;
              }
           }
 #endif
        }
                 pinfo = pinfo->next;
              }
           }
 #endif
        }

-#ifdef PNG_USER_MEM_SUPPORTED
-       fprintf(STDERR, "Maximum memory allocation: %d bytes\n",
+#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
+       fprintf(STDERR, " Current memory allocation: %10d bytes\n",
+          current_allocation);
+       fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",

           maximum_allocation);
           maximum_allocation);

+       fprintf(STDERR, " Total   memory allocation: %10d bytes\n",
+          total_allocation);
+       fprintf(STDERR, "     Number of allocations: %10d\n",
+            num_allocations);

 #endif
    }
 
 #endif
    }
 

+#ifdef PNGTEST_TIMING
+   t_stop = (float)clock();
+   t_misc += (t_stop - t_start);
+   t_start = t_stop;
+   fprintf(STDERR, " CPU time used = %.3f seconds",
+      (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
+   fprintf(STDERR, " (decoding %.3f,\n",
+      t_decode/(float)CLOCKS_PER_SEC);
+   fprintf(STDERR, "        encoding %.3f ,",
+      t_encode/(float)CLOCKS_PER_SEC);
+   fprintf(STDERR, " other %.3f seconds)\n\n",
+      t_misc/(float)CLOCKS_PER_SEC);
+#endif
+

    if (ierror == 0)
    if (ierror == 0)

-      fprintf(STDERR, "libpng passes test\n");
+      fprintf(STDERR, " libpng passes test\n");
+

    else
    else

-      fprintf(STDERR, "libpng FAILS test\n");
+      fprintf(STDERR, " libpng FAILS test\n");
+

    return (int)(ierror != 0);
 }
 
    return (int)(ierror != 0);
 }
 

+/* Generate a compiler error if there is an old png.h in the search path. */
+typedef png_libpng_version_1_5_7 Your_png_h_is_not_version_1_5_7;