Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1 | |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 2 | /* pngmem.c - stub functions for memory allocation |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 3 | * |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 4 | * Last changed in libpng 1.5.0 [August 2, 2010] |
Glenn Randers-Pehrson | e69b55d | 2010-01-01 10:29:06 -0600 | [diff] [blame] | 5 | * Copyright (c) 1998-2010 Glenn Randers-Pehrson |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 8 | * |
Glenn Randers-Pehrson | bfbf865 | 2009-06-26 21:46:52 -0500 | [diff] [blame] | 9 | * This code is released under the libpng license. |
Glenn Randers-Pehrson | c332bbc | 2009-06-25 13:43:50 -0500 | [diff] [blame] | 10 | * For conditions of distribution and use, see the disclaimer |
Glenn Randers-Pehrson | 037023b | 2009-06-24 10:27:36 -0500 | [diff] [blame] | 11 | * and license in png.h |
Glenn Randers-Pehrson | 3e61d79 | 2009-06-24 09:31:28 -0500 | [diff] [blame] | 12 | * |
Glenn Randers-Pehrson | 896239b | 1998-04-21 15:03:57 -0500 | [diff] [blame] | 13 | * This file provides a location for all memory allocation. Users who |
Glenn Randers-Pehrson | 345bc27 | 1998-06-14 14:43:31 -0500 | [diff] [blame] | 14 | * need special memory handling are expected to supply replacement |
| 15 | * functions for png_malloc() and png_free(), and to use |
| 16 | * png_create_read_struct_2() and png_create_write_struct_2() to |
| 17 | * identify the replacement functions. |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 18 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 19 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 20 | #include "pngpriv.h" |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 21 | |
Glenn Randers-Pehrson | c3cd22b | 2010-03-08 21:10:25 -0600 | [diff] [blame] | 22 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| 23 | |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 24 | /* Borland DOS special memory handler */ |
| 25 | #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 26 | /* If you change this, be sure to change the one in png.h also */ |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 27 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 28 | /* Allocate memory for a png_struct. The malloc and memset can be replaced |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 29 | by a single call to calloc() if this is thought to improve performance. */ |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 30 | PNG_FUNCTION(png_voidp /* PRIVATE */, |
| 31 | png_create_struct,(int type),PNG_ALLOCATED) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 32 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 33 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 34 | return (png_create_struct_2(type, NULL, NULL)); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | /* Alternate version of png_create_struct, for use with user-defined malloc. */ |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 38 | PNG_FUNCTION(png_voidp /* PRIVATE */, |
| 39 | png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), |
| 40 | PNG_ALLOCATED) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 41 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 42 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 43 | png_size_t size; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 44 | png_voidp struct_ptr; |
| 45 | |
| 46 | if (type == PNG_STRUCT_INFO) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 47 | size = png_sizeof(png_info); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 48 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 49 | else if (type == PNG_STRUCT_PNG) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 50 | size = png_sizeof(png_struct); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 51 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 52 | else |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 53 | return (png_get_copyright(NULL)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 54 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 55 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 56 | if (malloc_fn != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 57 | { |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 58 | png_struct dummy_struct; |
| 59 | png_structp png_ptr = &dummy_struct; |
| 60 | png_ptr->mem_ptr=mem_ptr; |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 61 | struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 62 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 63 | |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 64 | else |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 65 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 66 | struct_ptr = (png_voidp)farmalloc(size); |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 67 | if (struct_ptr != NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 68 | png_memset(struct_ptr, 0, size); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 69 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 70 | return (struct_ptr); |
| 71 | } |
| 72 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 73 | /* Free memory allocated by a png_create_struct() call */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 74 | void /* PRIVATE */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 75 | png_destroy_struct(png_voidp struct_ptr) |
| 76 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 77 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 78 | png_destroy_struct_2(struct_ptr, NULL, NULL); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | /* Free memory allocated by a png_create_struct() call */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 82 | void /* PRIVATE */ |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 83 | png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, |
| 84 | png_voidp mem_ptr) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 85 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 86 | # endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 87 | if (struct_ptr != NULL) |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 88 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 89 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 90 | if (free_fn != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 91 | { |
| 92 | png_struct dummy_struct; |
| 93 | png_structp png_ptr = &dummy_struct; |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 94 | png_ptr->mem_ptr=mem_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 95 | (*(free_fn))(png_ptr, struct_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 96 | return; |
| 97 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 98 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 99 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 100 | farfree (struct_ptr); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 101 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 102 | } |
| 103 | |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 104 | /* Allocate memory. For reasonable files, size should never exceed |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 105 | * 64K. However, zlib may allocate more then 64K if you don't tell |
| 106 | * it not to. See zconf.h and png.h for more information. zlib does |
| 107 | * need to allocate exactly 64K, so whatever you call here must |
| 108 | * have the ability to do that. |
| 109 | * |
| 110 | * Borland seems to have a problem in DOS mode for exactly 64K. |
Glenn Randers-Pehrson | 8686fff | 1998-05-21 09:27:50 -0500 | [diff] [blame] | 111 | * It gives you a segment with an offset of 8 (perhaps to store its |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 112 | * memory stuff). zlib doesn't like this at all, so we have to |
| 113 | * detect and deal with it. This code should not be needed in |
| 114 | * Windows or OS/2 modes, and only in 16 bit mode. This code has |
| 115 | * been updated by Alexander Lehmann for version 0.89 to waste less |
| 116 | * memory. |
| 117 | * |
| 118 | * Note that we can't use png_size_t for the "size" declaration, |
| 119 | * since on some systems a png_size_t is a 16-bit quantity, and as a |
| 120 | * result, we would be truncating potentially larger memory requests |
| 121 | * (which should cause a fatal error) and introducing major problems. |
| 122 | */ |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 123 | PNG_FUNCTION(png_voidp,PNGAPI |
| 124 | png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 125 | { |
| 126 | png_voidp ret; |
| 127 | |
| 128 | ret = (png_malloc(png_ptr, size)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 129 | |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 130 | if (ret != NULL) |
| 131 | png_memset(ret,0,(png_size_t)size); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 132 | |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 133 | return (ret); |
| 134 | } |
| 135 | |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 136 | PNG_FUNCTION(png_voidp,PNGAPI |
| 137 | png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 138 | { |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 139 | png_voidp ret; |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 140 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 141 | if (png_ptr == NULL || size == 0) |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 142 | return (NULL); |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 143 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 144 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 145 | if (png_ptr->malloc_fn != NULL) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 146 | ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 147 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 148 | else |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 149 | ret = (png_malloc_default(png_ptr, size)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 150 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 151 | if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 152 | png_error(png_ptr, "Out of memory"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 153 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 154 | return (ret); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 155 | } |
| 156 | |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 157 | PNG_FUNCTION(png_voidp,PNGAPI |
| 158 | png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 159 | { |
| 160 | png_voidp ret; |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 161 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 162 | |
Glenn Randers-Pehrson | 6b12c08 | 2006-11-14 10:53:30 -0600 | [diff] [blame] | 163 | if (png_ptr == NULL || size == 0) |
| 164 | return (NULL); |
| 165 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 166 | # ifdef PNG_MAX_MALLOC_64K |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 167 | if (size > (png_uint_32)65536L) |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 168 | { |
| 169 | png_warning(png_ptr, "Cannot Allocate > 64K"); |
| 170 | ret = NULL; |
| 171 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 172 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 173 | else |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 174 | # endif |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 175 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 176 | if (size != (size_t)size) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 177 | ret = NULL; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 178 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 179 | else if (size == (png_uint_32)65536L) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 180 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 181 | if (png_ptr->offset_table == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 182 | { |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 183 | /* Try to see if we need to do any of this fancy stuff */ |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 184 | ret = farmalloc(size); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 185 | if (ret == NULL || ((png_size_t)ret & 0xffff)) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 186 | { |
| 187 | int num_blocks; |
| 188 | png_uint_32 total_size; |
| 189 | png_bytep table; |
| 190 | int i; |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 191 | png_byte huge * hptr; |
| 192 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 193 | if (ret != NULL) |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 194 | { |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 195 | farfree(ret); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 196 | ret = NULL; |
| 197 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 198 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 199 | if (png_ptr->zlib_window_bits > 14) |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 200 | num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 201 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 202 | else |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 203 | num_blocks = 1; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 204 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 205 | if (png_ptr->zlib_mem_level >= 7) |
| 206 | num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 207 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 208 | else |
| 209 | num_blocks++; |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 210 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 211 | total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 212 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 213 | table = farmalloc(total_size); |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 214 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 215 | if (table == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 216 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 217 | # ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 218 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 219 | png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */ |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 220 | |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 221 | else |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 222 | png_warning(png_ptr, "Out Of Memory"); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 223 | # endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 224 | return (NULL); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 225 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 226 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 227 | if ((png_size_t)table & 0xfff0) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 228 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 229 | # ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 230 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 231 | png_error(png_ptr, |
| 232 | "Farmalloc didn't return normalized pointer"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 233 | |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 234 | else |
| 235 | png_warning(png_ptr, |
| 236 | "Farmalloc didn't return normalized pointer"); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 237 | # endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 238 | return (NULL); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 239 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 240 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 241 | png_ptr->offset_table = table; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 242 | png_ptr->offset_table_ptr = farmalloc(num_blocks * |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 243 | png_sizeof(png_bytep)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 244 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 245 | if (png_ptr->offset_table_ptr == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 246 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 247 | # ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 248 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 249 | png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */ |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 250 | |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 251 | else |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 252 | png_warning(png_ptr, "Out Of memory"); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 253 | # endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 254 | return (NULL); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | hptr = (png_byte huge *)table; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 258 | if ((png_size_t)hptr & 0xf) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 259 | { |
| 260 | hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 261 | hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 262 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 263 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 264 | for (i = 0; i < num_blocks; i++) |
| 265 | { |
| 266 | png_ptr->offset_table_ptr[i] = (png_bytep)hptr; |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 267 | hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */ |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 268 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 269 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 270 | png_ptr->offset_table_number = num_blocks; |
| 271 | png_ptr->offset_table_count = 0; |
| 272 | png_ptr->offset_table_count_free = 0; |
| 273 | } |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 274 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 275 | |
| 276 | if (png_ptr->offset_table_count >= png_ptr->offset_table_number) |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 277 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 278 | # ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 279 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 280 | png_error(png_ptr, "Out of Memory"); /* Note "o" and "M" */ |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 281 | |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 282 | else |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 283 | png_warning(png_ptr, "Out of Memory"); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 284 | # endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 285 | return (NULL); |
| 286 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 287 | |
| 288 | ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 289 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 290 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 291 | else |
| 292 | ret = farmalloc(size); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 293 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 294 | # ifndef PNG_USER_MEM_SUPPORTED |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 295 | if (ret == NULL) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 296 | { |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 297 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 298 | png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */ |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 299 | |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 300 | else |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 301 | png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 302 | } |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 303 | # endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 304 | |
Glenn Randers-Pehrson | b212002 | 1998-01-31 20:07:59 -0600 | [diff] [blame] | 305 | return (ret); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 306 | } |
| 307 | |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 308 | /* Free a pointer allocated by png_malloc(). In the default |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 309 | * configuration, png_ptr is not used, but is passed in case it |
| 310 | * is needed. If ptr is NULL, return without taking any action. |
| 311 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 312 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 313 | png_free(png_structp png_ptr, png_voidp ptr) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 314 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 315 | if (png_ptr == NULL || ptr == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 316 | return; |
| 317 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 318 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 319 | if (png_ptr->free_fn != NULL) |
| 320 | { |
| 321 | (*(png_ptr->free_fn))(png_ptr, ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 322 | return; |
| 323 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 324 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 325 | else |
| 326 | png_free_default(png_ptr, ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 327 | } |
| 328 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 329 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 330 | png_free_default(png_structp png_ptr, png_voidp ptr) |
| 331 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 332 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 333 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 334 | if (png_ptr == NULL || ptr == NULL) |
| 335 | return; |
Glenn Randers-Pehrson | 6b12c08 | 2006-11-14 10:53:30 -0600 | [diff] [blame] | 336 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 337 | if (png_ptr->offset_table != NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 338 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 339 | int i; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 340 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 341 | for (i = 0; i < png_ptr->offset_table_count; i++) |
| 342 | { |
| 343 | if (ptr == png_ptr->offset_table_ptr[i]) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 344 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 345 | ptr = NULL; |
| 346 | png_ptr->offset_table_count_free++; |
| 347 | break; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 348 | } |
| 349 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 350 | if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) |
| 351 | { |
| 352 | farfree(png_ptr->offset_table); |
| 353 | farfree(png_ptr->offset_table_ptr); |
| 354 | png_ptr->offset_table = NULL; |
| 355 | png_ptr->offset_table_ptr = NULL; |
| 356 | } |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 357 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 358 | |
| 359 | if (ptr != NULL) |
| 360 | farfree(ptr); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | #else /* Not the Borland DOS special memory handler */ |
| 364 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 365 | /* Allocate memory for a png_struct or a png_info. The malloc and |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 366 | memset can be replaced by a single call to calloc() if this is thought |
Glenn Randers-Pehrson | d1e8c86 | 2002-06-20 06:54:34 -0500 | [diff] [blame] | 367 | to improve performance noticably. */ |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 368 | PNG_FUNCTION(png_voidp /* PRIVATE */, |
| 369 | png_create_struct,(int type),PNG_ALLOCATED) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 370 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 371 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 372 | return (png_create_struct_2(type, NULL, NULL)); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | /* Allocate memory for a png_struct or a png_info. The malloc and |
| 376 | memset can be replaced by a single call to calloc() if this is thought |
Glenn Randers-Pehrson | d1e8c86 | 2002-06-20 06:54:34 -0500 | [diff] [blame] | 377 | to improve performance noticably. */ |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 378 | PNG_FUNCTION(png_voidp /* PRIVATE */, |
| 379 | png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), |
| 380 | PNG_ALLOCATED) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 381 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 382 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 383 | png_size_t size; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 384 | png_voidp struct_ptr; |
| 385 | |
| 386 | if (type == PNG_STRUCT_INFO) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 387 | size = png_sizeof(png_info); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 388 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 389 | else if (type == PNG_STRUCT_PNG) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 390 | size = png_sizeof(png_struct); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 391 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 392 | else |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 393 | return (NULL); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 394 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 395 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 396 | if (malloc_fn != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 397 | { |
Glenn Randers-Pehrson | 5cded0b | 2001-11-07 07:10:08 -0600 | [diff] [blame] | 398 | png_struct dummy_struct; |
| 399 | png_structp png_ptr = &dummy_struct; |
| 400 | png_ptr->mem_ptr=mem_ptr; |
Glenn Randers-Pehrson | ae498dc | 2001-11-24 14:53:31 -0600 | [diff] [blame] | 401 | struct_ptr = (*(malloc_fn))(png_ptr, size); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 402 | |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 403 | if (struct_ptr != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 404 | png_memset(struct_ptr, 0, size); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 405 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 406 | return (struct_ptr); |
| 407 | } |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 408 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 409 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 410 | # if defined(__TURBOC__) && !defined(__FLAT__) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 411 | struct_ptr = (png_voidp)farmalloc(size); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 412 | # else |
| 413 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 414 | struct_ptr = (png_voidp)halloc(size, 1); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 415 | # else |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 416 | struct_ptr = (png_voidp)malloc(size); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 417 | # endif |
| 418 | # endif |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 419 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 420 | if (struct_ptr != NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 421 | png_memset(struct_ptr, 0, size); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 422 | |
| 423 | return (struct_ptr); |
| 424 | } |
| 425 | |
| 426 | |
| 427 | /* Free memory allocated by a png_create_struct() call */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 428 | void /* PRIVATE */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 429 | png_destroy_struct(png_voidp struct_ptr) |
| 430 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 431 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 432 | png_destroy_struct_2(struct_ptr, NULL, NULL); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 433 | } |
| 434 | |
| 435 | /* Free memory allocated by a png_create_struct() call */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 436 | void /* PRIVATE */ |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 437 | png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, |
| 438 | png_voidp mem_ptr) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 439 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 440 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 441 | if (struct_ptr != NULL) |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 442 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 443 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 444 | if (free_fn != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 445 | { |
| 446 | png_struct dummy_struct; |
| 447 | png_structp png_ptr = &dummy_struct; |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 448 | png_ptr->mem_ptr=mem_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 449 | (*(free_fn))(png_ptr, struct_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 450 | return; |
| 451 | } |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 452 | # endif /* PNG_USER_MEM_SUPPORTED */ |
| 453 | # if defined(__TURBOC__) && !defined(__FLAT__) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 454 | farfree(struct_ptr); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 455 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 456 | # else |
| 457 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 458 | hfree(struct_ptr); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 459 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 460 | # else |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 461 | free(struct_ptr); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 462 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 463 | # endif |
| 464 | # endif |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 465 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 466 | } |
| 467 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 468 | /* Allocate memory. For reasonable files, size should never exceed |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 469 | * 64K. However, zlib may allocate more then 64K if you don't tell |
| 470 | * it not to. See zconf.h and png.h for more information. zlib does |
| 471 | * need to allocate exactly 64K, so whatever you call here must |
| 472 | * have the ability to do that. |
| 473 | */ |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 474 | |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 475 | PNG_FUNCTION(png_voidp,PNGAPI |
| 476 | png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 477 | { |
| 478 | png_voidp ret; |
| 479 | |
| 480 | ret = (png_malloc(png_ptr, size)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 481 | |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 482 | if (ret != NULL) |
| 483 | png_memset(ret,0,(png_size_t)size); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 484 | |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 485 | return (ret); |
| 486 | } |
| 487 | |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 488 | PNG_FUNCTION(png_voidp,PNGAPI |
| 489 | png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 490 | { |
| 491 | png_voidp ret; |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 492 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 493 | # ifdef PNG_USER_MEM_SUPPORTED |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 494 | if (png_ptr == NULL || size == 0) |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 495 | return (NULL); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 496 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 497 | if (png_ptr->malloc_fn != NULL) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 498 | ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 499 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 500 | else |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 501 | ret = (png_malloc_default(png_ptr, size)); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 502 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 503 | if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 504 | png_error(png_ptr, "Out of Memory"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 505 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 506 | return (ret); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 507 | } |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 508 | |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 509 | PNG_FUNCTION(png_voidp,PNGAPI |
| 510 | png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 511 | { |
| 512 | png_voidp ret; |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 513 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 514 | |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 515 | if (png_ptr == NULL || size == 0) |
| 516 | return (NULL); |
| 517 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 518 | # ifdef PNG_MAX_MALLOC_64K |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 519 | if (size > (png_uint_32)65536L) |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 520 | { |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 521 | # ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 522 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 523 | png_error(png_ptr, "Cannot Allocate > 64K"); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 524 | |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 525 | else |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 526 | # endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 527 | return NULL; |
| 528 | } |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 529 | # endif |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 530 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 531 | /* Check for overflow */ |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 532 | # if defined(__TURBOC__) && !defined(__FLAT__) |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 533 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 534 | if (size != (unsigned long)size) |
| 535 | ret = NULL; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 536 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 537 | else |
| 538 | ret = farmalloc(size); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 539 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 540 | # else |
| 541 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 542 | if (size != (unsigned long)size) |
| 543 | ret = NULL; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 544 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 545 | else |
| 546 | ret = halloc(size, 1); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 547 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 548 | # else |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 549 | if (size != (size_t)size) |
| 550 | ret = NULL; |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 551 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 552 | else |
| 553 | ret = malloc((size_t)size); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 554 | # endif |
| 555 | # endif |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 556 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 557 | # ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 558 | if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 559 | png_error(png_ptr, "Out of Memory"); |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 560 | # endif |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 561 | |
Glenn Randers-Pehrson | b212002 | 1998-01-31 20:07:59 -0600 | [diff] [blame] | 562 | return (ret); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 563 | } |
| 564 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 565 | /* Free a pointer allocated by png_malloc(). If ptr is NULL, return |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 566 | * without taking any action. |
| 567 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 568 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 569 | png_free(png_structp png_ptr, png_voidp ptr) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 570 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 571 | if (png_ptr == NULL || ptr == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 572 | return; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 573 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 574 | # ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 575 | if (png_ptr->free_fn != NULL) |
| 576 | { |
| 577 | (*(png_ptr->free_fn))(png_ptr, ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 578 | return; |
| 579 | } |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 580 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 581 | else |
| 582 | png_free_default(png_ptr, ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 583 | } |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 584 | |
Glenn Randers-Pehrson | 73d57cb | 2002-03-25 18:49:08 -0600 | [diff] [blame] | 585 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 586 | png_free_default(png_structp png_ptr, png_voidp ptr) |
| 587 | { |
Glenn Randers-Pehrson | 6d8f3b0 | 1999-10-23 08:39:18 -0500 | [diff] [blame] | 588 | if (png_ptr == NULL || ptr == NULL) |
| 589 | return; |
| 590 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 591 | # endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 592 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 593 | # if defined(__TURBOC__) && !defined(__FLAT__) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 594 | farfree(ptr); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 595 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 596 | # else |
| 597 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 598 | hfree(ptr); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 599 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 600 | # else |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 601 | free(ptr); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 602 | |
Glenn Randers-Pehrson | 6f6a91a | 2010-03-06 13:54:59 -0600 | [diff] [blame] | 603 | # endif |
| 604 | # endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 605 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 606 | #endif /* Not Borland DOS special memory handler */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 607 | |
Glenn Randers-Pehrson | 2ae022d | 2002-07-01 22:23:46 -0500 | [diff] [blame] | 608 | /* This function was added at libpng version 1.2.3. The png_malloc_warn() |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 609 | * function will set up png_malloc() to issue a png_warning and return NULL |
| 610 | * instead of issuing a png_error, if it fails to allocate the requested |
| 611 | * memory. |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 612 | */ |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame^] | 613 | PNG_FUNCTION(png_voidp,PNGAPI |
| 614 | png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 615 | { |
| 616 | png_voidp ptr; |
Glenn Randers-Pehrson | ae4bd5c | 2006-11-16 20:35:49 -0600 | [diff] [blame] | 617 | png_uint_32 save_flags; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 618 | if (png_ptr == NULL) |
| 619 | return (NULL); |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 620 | |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 621 | save_flags = png_ptr->flags; |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 622 | png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; |
| 623 | ptr = (png_voidp)png_malloc((png_structp)png_ptr, size); |
| 624 | png_ptr->flags=save_flags; |
| 625 | return(ptr); |
| 626 | } |
| 627 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 628 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 629 | #ifdef PNG_USER_MEM_SUPPORTED |
| 630 | /* This function is called when the application wants to use another method |
| 631 | * of allocating and freeing memory. |
| 632 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 633 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 634 | png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr |
| 635 | malloc_fn, png_free_ptr free_fn) |
| 636 | { |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 637 | if (png_ptr != NULL) |
| 638 | { |
| 639 | png_ptr->mem_ptr = mem_ptr; |
| 640 | png_ptr->malloc_fn = malloc_fn; |
| 641 | png_ptr->free_fn = free_fn; |
Glenn Randers-Pehrson | 6b12c08 | 2006-11-14 10:53:30 -0600 | [diff] [blame] | 642 | } |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | /* This function returns a pointer to the mem_ptr associated with the user |
| 646 | * functions. The application should free any memory associated with this |
| 647 | * pointer before png_write_destroy and png_read_destroy are called. |
| 648 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 649 | png_voidp PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 650 | png_get_mem_ptr(png_structp png_ptr) |
| 651 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 652 | if (png_ptr == NULL) |
| 653 | return (NULL); |
Glenn Randers-Pehrson | f24daf2 | 2010-05-06 09:44:04 -0500 | [diff] [blame] | 654 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 655 | return ((png_voidp)png_ptr->mem_ptr); |
| 656 | } |
| 657 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 658 | #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |