FCL/interim/QEMU: comparison symbian-qemu-0.9.1-12/libpng-1.2.32/png.c

equal deleted inserted replaced

-:ffa851df0825
+:2fb8b9db1c86
+/* png.c - location for general purpose libpng functions
+*
+* Last changed in libpng 1.2.30 [August 15, 2008]
+* For conditions of distribution and use, see copyright notice in png.h
+* 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.)
+*/
+#define PNG_INTERNAL
+#define PNG_NO_EXTERN
+#include "png.h"
+/* Generate a compiler error if there is an old png.h in the search path. */
+typedef version_1_2_32 Your_png_h_is_not_version_1_2_32;
+/* Version information for C files.  This had better match the version
+* string defined in png.h.  */
+#ifdef PNG_USE_GLOBAL_ARRAYS
+/* png_libpng_ver was changed to a function in version 1.0.5c */
+PNG_CONST char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING;
+#ifdef PNG_READ_SUPPORTED
+/* png_sig was changed to a function in version 1.0.5c */
+/* Place to hold the signature string for a PNG file. */
+PNG_CONST png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+#endif /* PNG_READ_SUPPORTED */
+/* Invoke global declarations for constant strings for known chunk types */
+PNG_IHDR;
+PNG_IDAT;
+PNG_IEND;
+PNG_PLTE;
+PNG_bKGD;
+PNG_cHRM;
+PNG_gAMA;
+PNG_hIST;
+PNG_iCCP;
+PNG_iTXt;
+PNG_oFFs;
+PNG_pCAL;
+PNG_sCAL;
+PNG_pHYs;
+PNG_sBIT;
+PNG_sPLT;
+PNG_sRGB;
+PNG_tEXt;
+PNG_tIME;
+PNG_tRNS;
+PNG_zTXt;
+#ifdef PNG_READ_SUPPORTED
+/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
+/* start of interlace block */
+PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
+/* offset to next interlace block */
+PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
+/* start of interlace block in the y direction */
+PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
+/* offset to next interlace block in the y direction */
+PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
+/* Height of interlace block.  This is not currently used - if you need
+* it, uncomment it here and in png.h
+PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
+*/
+/* Mask to determine which pixels are valid in a pass */
+PNG_CONST int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
+/* Mask to determine which pixels to overwrite while displaying */
+PNG_CONST int FARDATA png_pass_dsp_mask[]
+= {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
+#endif /* PNG_READ_SUPPORTED */
+#endif /* PNG_USE_GLOBAL_ARRAYS */
+/* Tells libpng that we have already handled the first "num_bytes" bytes
+* of the PNG file signature.  If the PNG data is embedded into another
+* stream we can set num_bytes = 8 so that libpng will not attempt to read
+* or write any of the magic bytes before it starts on the IHDR.
+*/
+#ifdef PNG_READ_SUPPORTED
+void PNGAPI
+png_set_sig_bytes(png_structp png_ptr, int num_bytes)
+{
+if (png_ptr == NULL) return;
+png_debug(1, "in png_set_sig_bytes\n");
+if (num_bytes > 8)
+png_error(png_ptr, "Too many bytes for PNG signature.");
+png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes);
+}
+/* Checks whether the supplied bytes match the PNG signature.  We allow
+* checking less than the full 8-byte signature so that those apps that
+* already read the first few bytes of a file to determine the file type
+* can simply check the remaining bytes for extra assurance.  Returns
+* an integer less than, equal to, or greater than zero if sig is found,
+* respectively, to be less than, to match, or be greater than the correct
+* PNG signature (this is the same behaviour as strcmp, memcmp, etc).
+*/
+int PNGAPI
+png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
+{
+png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+if (num_to_check > 8)
+num_to_check = 8;
+else if (num_to_check < 1)
+return (-1);
+if (start > 7)
+return (-1);
+if (start + num_to_check > 8)
+num_to_check = 8 - start;
+return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
+}
+#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
+/* (Obsolete) function to check signature bytes.  It does not allow one
+* to check a partial signature.  This function might be removed in the
+* future - use png_sig_cmp().  Returns true (nonzero) if the file is PNG.
+*/
+int PNGAPI
+png_check_sig(png_bytep sig, int num)
+{
+return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
+}
+#endif
+#endif /* PNG_READ_SUPPORTED */
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+/* Function to allocate memory for zlib and clear it to 0. */
+#ifdef PNG_1_0_X
+voidpf PNGAPI
+#else
+voidpf /* private */
+#endif
+png_zalloc(voidpf png_ptr, uInt items, uInt size)
+{
+png_voidp ptr;
+png_structp p=(png_structp)png_ptr;
+png_uint_32 save_flags=p->flags;
+png_uint_32 num_bytes;
+if (png_ptr == NULL) return (NULL);
+if (items > PNG_UINT_32_MAX/size)
+{
+png_warning (p, "Potential overflow in png_zalloc()");
+return (NULL);
+}
+num_bytes = (png_uint_32)items * size;
+p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
+ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
+p->flags=save_flags;
+#if defined(PNG_1_0_X) && !defined(PNG_NO_ZALLOC_ZERO)
+if (ptr == NULL)
+return ((voidpf)ptr);
+if (num_bytes > (png_uint_32)0x8000L)
+{
+png_memset(ptr, 0, (png_size_t)0x8000L);
+png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0,
+(png_size_t)(num_bytes - (png_uint_32)0x8000L));
+}
+else
+{
+png_memset(ptr, 0, (png_size_t)num_bytes);
+}
+#endif
+return ((voidpf)ptr);
+}
+/* function to free memory for zlib */
+#ifdef PNG_1_0_X
+void PNGAPI
+#else
+void /* private */
+#endif
+png_zfree(voidpf png_ptr, voidpf ptr)
+{
+png_free((png_structp)png_ptr, (png_voidp)ptr);
+}
+/* Reset the CRC variable to 32 bits of 1's.  Care must be taken
+* in case CRC is > 32 bits to leave the top bits 0.
+*/
+void /* PRIVATE */
+png_reset_crc(png_structp png_ptr)
+{
+png_ptr->crc = crc32(0, Z_NULL, 0);
+}
+/* Calculate the CRC over a section of data.  We can only pass as
+* much data to this routine as the largest single buffer size.  We
+* also check that this data will actually be used before going to the
+* trouble of calculating it.
+*/
+void /* PRIVATE */
+png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length)
+{
+int need_crc = 1;
+if (png_ptr->chunk_name[0] & 0x20)                     /* ancillary */
+{
+if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
+(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
+need_crc = 0;
+}
+else                                                    /* critical */
+{
+if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
+need_crc = 0;
+}
+if (need_crc)
+png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
+}
+/* Allocate the memory for an info_struct for the application.  We don't
+* really need the png_ptr, but it could potentially be useful in the
+* future.  This should be used in favour of malloc(png_sizeof(png_info))
+* and png_info_init() so that applications that want to use a shared
+* libpng don't have to be recompiled if png_info changes size.
+*/
+png_infop PNGAPI
+png_create_info_struct(png_structp png_ptr)
+{
+png_infop info_ptr;
+png_debug(1, "in png_create_info_struct\n");
+if (png_ptr == NULL) return (NULL);
+#ifdef PNG_USER_MEM_SUPPORTED
+info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
+png_ptr->malloc_fn, png_ptr->mem_ptr);
+#else
+info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
+#endif
+if (info_ptr != NULL)
+png_info_init_3(&info_ptr, png_sizeof(png_info));
+return (info_ptr);
+}
+/* This function frees the memory associated with a single info struct.
+* Normally, one would use either png_destroy_read_struct() or
+* png_destroy_write_struct() to free an info struct, but this may be
+* useful for some applications.
+*/
+void PNGAPI
+png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
+{
+png_infop info_ptr = NULL;
+if (png_ptr == NULL) return;
+png_debug(1, "in png_destroy_info_struct\n");
+if (info_ptr_ptr != NULL)
+info_ptr = *info_ptr_ptr;
+if (info_ptr != NULL)
+{
+png_info_destroy(png_ptr, info_ptr);
+#ifdef PNG_USER_MEM_SUPPORTED
+png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
+png_ptr->mem_ptr);
+#else
+png_destroy_struct((png_voidp)info_ptr);
+#endif
+*info_ptr_ptr = NULL;
+}
+}
+/* Initialize the info structure.  This is now an internal function (0.89)
+* and applications using it are urged to use png_create_info_struct()
+* instead.
+*/
+#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
+#undef png_info_init
+void PNGAPI
+png_info_init(png_infop info_ptr)
+{
+/* We only come here via pre-1.0.12-compiled applications */
+png_info_init_3(&info_ptr, 0);
+}
+#endif
+void PNGAPI
+png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
+{
+png_infop info_ptr = *ptr_ptr;
+if (info_ptr == NULL) return;
+png_debug(1, "in png_info_init_3\n");
+if (png_sizeof(png_info) > png_info_struct_size)
+{
+png_destroy_struct(info_ptr);
+info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
+*ptr_ptr = info_ptr;
+}
+/* set everything to 0 */
+png_memset(info_ptr, 0, png_sizeof(png_info));
+}
+#ifdef PNG_FREE_ME_SUPPORTED
+void PNGAPI
+png_data_freer(png_structp png_ptr, png_infop info_ptr,
+int freer, png_uint_32 mask)
+{
+png_debug(1, "in png_data_freer\n");
+if (png_ptr == NULL || info_ptr == NULL)
+return;
+if (freer == PNG_DESTROY_WILL_FREE_DATA)
+info_ptr->free_me |= mask;
+else if (freer == PNG_USER_WILL_FREE_DATA)
+info_ptr->free_me &= ~mask;
+else
+png_warning(png_ptr,
+"Unknown freer parameter in png_data_freer.");
+}
+#endif
+void PNGAPI
+png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
+int num)
+{
+png_debug(1, "in png_free_data\n");
+if (png_ptr == NULL || info_ptr == NULL)
+return;
+#if defined(PNG_TEXT_SUPPORTED)
+/* free text item num or (if num == -1) all text items */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_TEXT)
+#endif
+{
+if (num != -1)
+{
+if (info_ptr->text && info_ptr->text[num].key)
+{
+png_free(png_ptr, info_ptr->text[num].key);
+info_ptr->text[num].key = NULL;
+}
+}
+else
+{
+int i;
+for (i = 0; i < info_ptr->num_text; i++)
+png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
+png_free(png_ptr, info_ptr->text);
+info_ptr->text = NULL;
+info_ptr->num_text=0;
+}
+}
+#endif
+#if defined(PNG_tRNS_SUPPORTED)
+/* free any tRNS entry */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
+#else
+if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
+#endif
+{
+png_free(png_ptr, info_ptr->trans);
+info_ptr->trans = NULL;
+info_ptr->valid &= ~PNG_INFO_tRNS;
+#ifndef PNG_FREE_ME_SUPPORTED
+png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
+#endif
+}
+#endif
+#if defined(PNG_sCAL_SUPPORTED)
+/* free any sCAL entry */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_SCAL)
+#endif
+{
+#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
+png_free(png_ptr, info_ptr->scal_s_width);
+png_free(png_ptr, info_ptr->scal_s_height);
+info_ptr->scal_s_width = NULL;
+info_ptr->scal_s_height = NULL;
+#endif
+info_ptr->valid &= ~PNG_INFO_sCAL;
+}
+#endif
+#if defined(PNG_pCAL_SUPPORTED)
+/* free any pCAL entry */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_PCAL)
+#endif
+{
+png_free(png_ptr, info_ptr->pcal_purpose);
+png_free(png_ptr, info_ptr->pcal_units);
+info_ptr->pcal_purpose = NULL;
+info_ptr->pcal_units = NULL;
+if (info_ptr->pcal_params != NULL)
+{
+int i;
+for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
+{
+png_free(png_ptr, info_ptr->pcal_params[i]);
+info_ptr->pcal_params[i]=NULL;
+}
+png_free(png_ptr, info_ptr->pcal_params);
+info_ptr->pcal_params = NULL;
+}
+info_ptr->valid &= ~PNG_INFO_pCAL;
+}
+#endif
+#if defined(PNG_iCCP_SUPPORTED)
+/* free any iCCP entry */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_ICCP)
+#endif
+{
+png_free(png_ptr, info_ptr->iccp_name);
+png_free(png_ptr, info_ptr->iccp_profile);
+info_ptr->iccp_name = NULL;
+info_ptr->iccp_profile = NULL;
+info_ptr->valid &= ~PNG_INFO_iCCP;
+}
+#endif
+#if defined(PNG_sPLT_SUPPORTED)
+/* free a given sPLT entry, or (if num == -1) all sPLT entries */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_SPLT)
+#endif
+{
+if (num != -1)
+{
+if (info_ptr->splt_palettes)
+{
+png_free(png_ptr, info_ptr->splt_palettes[num].name);
+png_free(png_ptr, info_ptr->splt_palettes[num].entries);
+info_ptr->splt_palettes[num].name = NULL;
+info_ptr->splt_palettes[num].entries = NULL;
+}
+}
+else
+{
+if (info_ptr->splt_palettes_num)
+{
+int i;
+for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
+png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
+png_free(png_ptr, info_ptr->splt_palettes);
+info_ptr->splt_palettes = NULL;
+info_ptr->splt_palettes_num = 0;
+}
+info_ptr->valid &= ~PNG_INFO_sPLT;
+}
+}
+#endif
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+if (png_ptr->unknown_chunk.data)
+{
+png_free(png_ptr, png_ptr->unknown_chunk.data);
+png_ptr->unknown_chunk.data = NULL;
+}
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_UNKN)
+#endif
+{
+if (num != -1)
+{
+if (info_ptr->unknown_chunks)
+{
+png_free(png_ptr, info_ptr->unknown_chunks[num].data);
+info_ptr->unknown_chunks[num].data = NULL;
+}
+}
+else
+{
+int i;
+if (info_ptr->unknown_chunks_num)
+{
+for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
+png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
+png_free(png_ptr, info_ptr->unknown_chunks);
+info_ptr->unknown_chunks = NULL;
+info_ptr->unknown_chunks_num = 0;
+}
+}
+}
+#endif
+#if defined(PNG_hIST_SUPPORTED)
+/* free any hIST entry */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_HIST)  & info_ptr->free_me)
+#else
+if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
+#endif
+{
+png_free(png_ptr, info_ptr->hist);
+info_ptr->hist = NULL;
+info_ptr->valid &= ~PNG_INFO_hIST;
+#ifndef PNG_FREE_ME_SUPPORTED
+png_ptr->flags &= ~PNG_FLAG_FREE_HIST;
+#endif
+}
+#endif
+/* free any PLTE entry that was internally allocated */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
+#else
+if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
+#endif
+{
+png_zfree(png_ptr, info_ptr->palette);
+info_ptr->palette = NULL;
+info_ptr->valid &= ~PNG_INFO_PLTE;
+#ifndef PNG_FREE_ME_SUPPORTED
+png_ptr->flags &= ~PNG_FLAG_FREE_PLTE;
+#endif
+info_ptr->num_palette = 0;
+}
+#if defined(PNG_INFO_IMAGE_SUPPORTED)
+/* free any image bits attached to the info structure */
+#ifdef PNG_FREE_ME_SUPPORTED
+if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
+#else
+if (mask & PNG_FREE_ROWS)
+#endif
+{
+if (info_ptr->row_pointers)
+{
+int row;
+for (row = 0; row < (int)info_ptr->height; row++)
+{
+png_free(png_ptr, info_ptr->row_pointers[row]);
+info_ptr->row_pointers[row]=NULL;
+}
+png_free(png_ptr, info_ptr->row_pointers);
+info_ptr->row_pointers=NULL;
+}
+info_ptr->valid &= ~PNG_INFO_IDAT;
+}
+#endif
+#ifdef PNG_FREE_ME_SUPPORTED
+if (num == -1)
+info_ptr->free_me &= ~mask;
+else
+info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
+#endif
+}
+/* This is an internal routine to free any memory that the info struct is
+* pointing to before re-using it or freeing the struct itself.  Recall
+* that png_free() checks for NULL pointers for us.
+*/
+void /* PRIVATE */
+png_info_destroy(png_structp png_ptr, png_infop info_ptr)
+{
+png_debug(1, "in png_info_destroy\n");
+png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
+if (png_ptr->num_chunk_list)
+{
+png_free(png_ptr, png_ptr->chunk_list);
+png_ptr->chunk_list=NULL;
+png_ptr->num_chunk_list = 0;
+}
+#endif
+png_info_init_3(&info_ptr, png_sizeof(png_info));
+}
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+/* This function returns a pointer to the io_ptr associated with the user
+* functions.  The application should free any memory associated with this
+* pointer before png_write_destroy() or png_read_destroy() are called.
+*/
+png_voidp PNGAPI
+png_get_io_ptr(png_structp png_ptr)
+{
+if (png_ptr == NULL) return (NULL);
+return (png_ptr->io_ptr);
+}
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+#if !defined(PNG_NO_STDIO)
+/* Initialize the default input/output functions for the PNG file.  If you
+* use your own read or write routines, you can call either png_set_read_fn()
+* or png_set_write_fn() instead of png_init_io().  If you have defined
+* PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't
+* necessarily available.
+*/
+void PNGAPI
+png_init_io(png_structp png_ptr, png_FILE_p fp)
+{
+png_debug(1, "in png_init_io\n");
+if (png_ptr == NULL) return;
+png_ptr->io_ptr = (png_voidp)fp;
+}
+#endif
+#if defined(PNG_TIME_RFC1123_SUPPORTED)
+/* Convert the supplied time into an RFC 1123 string suitable for use in
+* a "Creation Time" or other text-based time string.
+*/
+png_charp PNGAPI
+png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
+{
+static PNG_CONST char short_months[12][4] =
+{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+if (png_ptr == NULL) return (NULL);
+if (png_ptr->time_buffer == NULL)
+{
+png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
+png_sizeof(char)));
+}
+#if defined(_WIN32_WCE)
+{
+wchar_t time_buf[29];
+wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"),
+ptime->day % 32, short_months[(ptime->month - 1) % 12],
+ptime->year, ptime->hour % 24, ptime->minute % 60,
+ptime->second % 61);
+WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29,
+NULL, NULL);
+}
+#else
+#ifdef USE_FAR_KEYWORD
+{
+char near_time_buf[29];
+png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000",
+ptime->day % 32, short_months[(ptime->month - 1) % 12],
+ptime->year, ptime->hour % 24, ptime->minute % 60,
+ptime->second % 61);
+png_memcpy(png_ptr->time_buffer, near_time_buf,
+29*png_sizeof(char));
+}
+#else
+png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000",
+ptime->day % 32, short_months[(ptime->month - 1) % 12],
+ptime->year, ptime->hour % 24, ptime->minute % 60,
+ptime->second % 61);
+#endif
+#endif /* _WIN32_WCE */
+return ((png_charp)png_ptr->time_buffer);
+}
+#endif /* PNG_TIME_RFC1123_SUPPORTED */
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+png_charp PNGAPI
+png_get_copyright(png_structp png_ptr)
+{
+png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
+return ((png_charp) "\n libpng version 1.2.32 - September 18, 2008\n\
+Copyright (c) 1998-2008 Glenn Randers-Pehrson\n\
+Copyright (c) 1996-1997 Andreas Dilger\n\
+Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
+}
+/* The following return the library version as a short string in the
+* format 1.0.0 through 99.99.99zz.  To get the version of *.h files
+* used with your application, print out PNG_LIBPNG_VER_STRING, which
+* is defined in png.h.
+* Note: now there is no difference between png_get_libpng_ver() and
+* png_get_header_ver().  Due to the version_nn_nn_nn typedef guard,
+* it is guaranteed that png.c uses the correct version of png.h.
+*/
+png_charp PNGAPI
+png_get_libpng_ver(png_structp png_ptr)
+{
+/* Version of *.c files used when building libpng */
+png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
+return ((png_charp) PNG_LIBPNG_VER_STRING);
+}
+png_charp PNGAPI
+png_get_header_ver(png_structp png_ptr)
+{
+/* Version of *.h files used when building libpng */
+png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
+return ((png_charp) PNG_LIBPNG_VER_STRING);
+}
+png_charp PNGAPI
+png_get_header_version(png_structp png_ptr)
+{
+/* Returns longer string containing both version and date */
+png_ptr = png_ptr;  /* silence compiler warning about unused png_ptr */
+return ((png_charp) PNG_HEADER_VERSION_STRING
+#ifndef PNG_READ_SUPPORTED
+"     (NO READ SUPPORT)"
+#endif
+"\n");
+}
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+int PNGAPI
+png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
+{
+/* check chunk_name and return "keep" value if it's on the list, else 0 */
+int i;
+png_bytep p;
+if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
+return 0;
+p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5;
+for (i = png_ptr->num_chunk_list; i; i--, p -= 5)
+if (!png_memcmp(chunk_name, p, 4))
+return ((int)*(p + 4));
+return 0;
+}
+#endif
+/* This function, added to libpng-1.0.6g, is untested. */
+int PNGAPI
+png_reset_zstream(png_structp png_ptr)
+{
+if (png_ptr == NULL) return Z_STREAM_ERROR;
+return (inflateReset(&png_ptr->zstream));
+}
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+/* This function was added to libpng-1.0.7 */
+png_uint_32 PNGAPI
+png_access_version_number(void)
+{
+/* Version of *.c files used when building libpng */
+return((png_uint_32) PNG_LIBPNG_VER);
+}
+#if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED)
+#if !defined(PNG_1_0_X)
+/* this function was added to libpng 1.2.0 */
+int PNGAPI
+png_mmx_support(void)
+{
+/* obsolete, to be removed from libpng-1.4.0 */
+return -1;
+}
+#endif /* PNG_1_0_X */
+#endif /* PNG_READ_SUPPORTED && PNG_ASSEMBLER_CODE_SUPPORTED */
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+#ifdef PNG_SIZE_T
+/* Added at libpng version 1.2.6 */
+PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
+png_size_t PNGAPI
+png_convert_size(size_t size)
+{
+if (size > (png_size_t)-1)
+PNG_ABORT();  /* We haven't got access to png_ptr, so no png_error() */
+return ((png_size_t)size);
+}
+#endif /* PNG_SIZE_T */
+#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */