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 | 668af4e | 2009-06-24 06:35:59 -0500 | [diff] [blame] | 4 | * Last changed in libpng 1.4.0 [June 24, 2009] |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 5 | * Copyright (c) 1998-2009 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 | 3e61d79 | 2009-06-24 09:31:28 -0500 | [diff] [blame] | 9 | * This code is released under the zlib-libpng license. |
Glenn Randers-Pehrson | 037023b | 2009-06-24 10:27:36 -0500 | [diff] [blame^] | 10 | * For conditions of distribution and use, see copyright notice, disclaimer, |
| 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 | |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 20 | #include "png.h" |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 21 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 22 | #include "pngpriv.h" |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 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 | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 30 | png_voidp /* PRIVATE */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 31 | png_create_struct(int type) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 32 | { |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [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 | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 38 | png_voidp /* PRIVATE */ |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 39 | png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 40 | { |
| 41 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 42 | png_size_t size; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 43 | png_voidp struct_ptr; |
| 44 | |
| 45 | if (type == PNG_STRUCT_INFO) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 46 | size = png_sizeof(png_info); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 47 | else if (type == PNG_STRUCT_PNG) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 48 | size = png_sizeof(png_struct); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 49 | else |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 50 | return (png_get_copyright(NULL)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 51 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 52 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 53 | if (malloc_fn != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 54 | { |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 55 | png_struct dummy_struct; |
| 56 | png_structp png_ptr = &dummy_struct; |
| 57 | png_ptr->mem_ptr=mem_ptr; |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 58 | struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 59 | } |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 60 | else |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 61 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 62 | struct_ptr = (png_voidp)farmalloc(size); |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 63 | if (struct_ptr != NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 64 | png_memset(struct_ptr, 0, size); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 65 | return (struct_ptr); |
| 66 | } |
| 67 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 68 | /* Free memory allocated by a png_create_struct() call */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 69 | void /* PRIVATE */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 70 | png_destroy_struct(png_voidp struct_ptr) |
| 71 | { |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 72 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 73 | png_destroy_struct_2(struct_ptr, NULL, NULL); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | /* Free memory allocated by a png_create_struct() call */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 77 | void /* PRIVATE */ |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 78 | png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, |
| 79 | png_voidp mem_ptr) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 80 | { |
| 81 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 82 | if (struct_ptr != NULL) |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 83 | { |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 84 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 85 | if (free_fn != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 86 | { |
| 87 | png_struct dummy_struct; |
| 88 | png_structp png_ptr = &dummy_struct; |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 89 | png_ptr->mem_ptr=mem_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 90 | (*(free_fn))(png_ptr, struct_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 91 | return; |
| 92 | } |
| 93 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 94 | farfree (struct_ptr); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 95 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 96 | } |
| 97 | |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 98 | /* Allocate memory. For reasonable files, size should never exceed |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 99 | * 64K. However, zlib may allocate more then 64K if you don't tell |
| 100 | * it not to. See zconf.h and png.h for more information. zlib does |
| 101 | * need to allocate exactly 64K, so whatever you call here must |
| 102 | * have the ability to do that. |
| 103 | * |
| 104 | * 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] | 105 | * 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] | 106 | * memory stuff). zlib doesn't like this at all, so we have to |
| 107 | * detect and deal with it. This code should not be needed in |
| 108 | * Windows or OS/2 modes, and only in 16 bit mode. This code has |
| 109 | * been updated by Alexander Lehmann for version 0.89 to waste less |
| 110 | * memory. |
| 111 | * |
| 112 | * Note that we can't use png_size_t for the "size" declaration, |
| 113 | * since on some systems a png_size_t is a 16-bit quantity, and as a |
| 114 | * result, we would be truncating potentially larger memory requests |
| 115 | * (which should cause a fatal error) and introducing major problems. |
| 116 | */ |
Glenn Randers-Pehrson | 0ffb71a | 2009-02-28 06:08:20 -0600 | [diff] [blame] | 117 | #ifdef PNG_CALLOC_SUPPORTED |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 118 | png_voidp PNGAPI |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 119 | png_calloc(png_structp png_ptr, png_alloc_size_t size) |
| 120 | { |
| 121 | png_voidp ret; |
| 122 | |
| 123 | ret = (png_malloc(png_ptr, size)); |
| 124 | if (ret != NULL) |
| 125 | png_memset(ret,0,(png_size_t)size); |
| 126 | return (ret); |
| 127 | } |
Glenn Randers-Pehrson | 0ffb71a | 2009-02-28 06:08:20 -0600 | [diff] [blame] | 128 | #endif |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 129 | |
| 130 | png_voidp PNGAPI |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 131 | png_malloc(png_structp png_ptr, png_alloc_size_t size) |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 132 | { |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 133 | png_voidp ret; |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 134 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 135 | if (png_ptr == NULL || size == 0) |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 136 | return (NULL); |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 137 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 138 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 139 | if (png_ptr->malloc_fn != NULL) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 140 | ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 141 | else |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 142 | ret = (png_malloc_default(png_ptr, size)); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 143 | 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] | 144 | png_error(png_ptr, "Out of memory"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 145 | return (ret); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 146 | } |
| 147 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 148 | png_voidp PNGAPI |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 149 | png_malloc_default(png_structp png_ptr, png_alloc_size_t size) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 150 | { |
| 151 | png_voidp ret; |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 152 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 153 | |
Glenn Randers-Pehrson | 6b12c08 | 2006-11-14 10:53:30 -0600 | [diff] [blame] | 154 | if (png_ptr == NULL || size == 0) |
| 155 | return (NULL); |
| 156 | |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 157 | #ifdef PNG_MAX_MALLOC_64K |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 158 | if (size > (png_uint_32)65536L) |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 159 | { |
| 160 | png_warning(png_ptr, "Cannot Allocate > 64K"); |
| 161 | ret = NULL; |
| 162 | } |
| 163 | else |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 164 | #endif |
| 165 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 166 | if (size != (size_t)size) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 167 | ret = NULL; |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 168 | else if (size == (png_uint_32)65536L) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 169 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 170 | if (png_ptr->offset_table == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 171 | { |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 172 | /* 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] | 173 | ret = farmalloc(size); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 174 | if (ret == NULL || ((png_size_t)ret & 0xffff)) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 175 | { |
| 176 | int num_blocks; |
| 177 | png_uint_32 total_size; |
| 178 | png_bytep table; |
| 179 | int i; |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 180 | png_byte huge * hptr; |
| 181 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 182 | if (ret != NULL) |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 183 | { |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 184 | farfree(ret); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 185 | ret = NULL; |
| 186 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 187 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 188 | if (png_ptr->zlib_window_bits > 14) |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 189 | num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14)); |
| 190 | else |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 191 | num_blocks = 1; |
| 192 | if (png_ptr->zlib_mem_level >= 7) |
| 193 | num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7)); |
| 194 | else |
| 195 | num_blocks++; |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 196 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 197 | total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 198 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 199 | table = farmalloc(total_size); |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 200 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 201 | if (table == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 202 | { |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 203 | #ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 204 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 205 | png_error(png_ptr, "Out Of Memory"); /* Note "O" and "M" */ |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 206 | else |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 207 | png_warning(png_ptr, "Out Of Memory"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 208 | #endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 209 | return (NULL); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 210 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 211 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 212 | if ((png_size_t)table & 0xfff0) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 213 | { |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 214 | #ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 215 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 216 | png_error(png_ptr, |
| 217 | "Farmalloc didn't return normalized pointer"); |
| 218 | else |
| 219 | png_warning(png_ptr, |
| 220 | "Farmalloc didn't return normalized pointer"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 221 | #endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 222 | return (NULL); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 223 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 224 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 225 | png_ptr->offset_table = table; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 226 | png_ptr->offset_table_ptr = farmalloc(num_blocks * |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 227 | png_sizeof(png_bytep)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 228 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 229 | if (png_ptr->offset_table_ptr == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 230 | { |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 231 | #ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 232 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 233 | png_error(png_ptr, "Out Of memory"); /* Note "O" and "M" */ |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 234 | else |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 235 | png_warning(png_ptr, "Out Of memory"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 236 | #endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 237 | return (NULL); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | hptr = (png_byte huge *)table; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 241 | if ((png_size_t)hptr & 0xf) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 242 | { |
| 243 | hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 244 | hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 245 | } |
| 246 | for (i = 0; i < num_blocks; i++) |
| 247 | { |
| 248 | png_ptr->offset_table_ptr[i] = (png_bytep)hptr; |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 249 | hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */ |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 250 | } |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 251 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 252 | png_ptr->offset_table_number = num_blocks; |
| 253 | png_ptr->offset_table_count = 0; |
| 254 | png_ptr->offset_table_count_free = 0; |
| 255 | } |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 256 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 257 | |
| 258 | if (png_ptr->offset_table_count >= png_ptr->offset_table_number) |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 259 | { |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 260 | #ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 261 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 262 | png_error(png_ptr, "Out of Memory"); /* Note "o" and "M" */ |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 263 | else |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 264 | png_warning(png_ptr, "Out of Memory"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 265 | #endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 266 | return (NULL); |
| 267 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 268 | |
| 269 | ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 270 | } |
| 271 | else |
| 272 | ret = farmalloc(size); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 273 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 274 | #ifndef PNG_USER_MEM_SUPPORTED |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 275 | if (ret == NULL) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 276 | { |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 277 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 278 | png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */ |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 279 | else |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 280 | png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 281 | } |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 282 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 283 | |
Glenn Randers-Pehrson | b212002 | 1998-01-31 20:07:59 -0600 | [diff] [blame] | 284 | return (ret); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 285 | } |
| 286 | |
Glenn Randers-Pehrson | 4bb4d01 | 2009-05-20 12:45:29 -0500 | [diff] [blame] | 287 | /* 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] | 288 | * configuration, png_ptr is not used, but is passed in case it |
| 289 | * is needed. If ptr is NULL, return without taking any action. |
| 290 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 291 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 292 | png_free(png_structp png_ptr, png_voidp ptr) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 293 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 294 | if (png_ptr == NULL || ptr == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 295 | return; |
| 296 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 297 | #ifdef PNG_USER_MEM_SUPPORTED |
| 298 | if (png_ptr->free_fn != NULL) |
| 299 | { |
| 300 | (*(png_ptr->free_fn))(png_ptr, ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 301 | return; |
| 302 | } |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 303 | else |
| 304 | png_free_default(png_ptr, ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 305 | } |
| 306 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 307 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 308 | png_free_default(png_structp png_ptr, png_voidp ptr) |
| 309 | { |
| 310 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 311 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 312 | if (png_ptr == NULL || ptr == NULL) |
| 313 | return; |
Glenn Randers-Pehrson | 6b12c08 | 2006-11-14 10:53:30 -0600 | [diff] [blame] | 314 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 315 | if (png_ptr->offset_table != NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 316 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 317 | int i; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 318 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 319 | for (i = 0; i < png_ptr->offset_table_count; i++) |
| 320 | { |
| 321 | if (ptr == png_ptr->offset_table_ptr[i]) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 322 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 323 | ptr = NULL; |
| 324 | png_ptr->offset_table_count_free++; |
| 325 | break; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 326 | } |
| 327 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 328 | if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) |
| 329 | { |
| 330 | farfree(png_ptr->offset_table); |
| 331 | farfree(png_ptr->offset_table_ptr); |
| 332 | png_ptr->offset_table = NULL; |
| 333 | png_ptr->offset_table_ptr = NULL; |
| 334 | } |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 335 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 336 | |
| 337 | if (ptr != NULL) |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 338 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 339 | farfree(ptr); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 340 | } |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | #else /* Not the Borland DOS special memory handler */ |
| 344 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 345 | /* 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] | 346 | 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] | 347 | to improve performance noticably. */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 348 | png_voidp /* PRIVATE */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 349 | png_create_struct(int type) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 350 | { |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 351 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 352 | return (png_create_struct_2(type, NULL, NULL)); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | /* Allocate memory for a png_struct or a png_info. The malloc and |
| 356 | 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] | 357 | to improve performance noticably. */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 358 | png_voidp /* PRIVATE */ |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 359 | png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 360 | { |
| 361 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 362 | png_size_t size; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 363 | png_voidp struct_ptr; |
| 364 | |
| 365 | if (type == PNG_STRUCT_INFO) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 366 | size = png_sizeof(png_info); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 367 | else if (type == PNG_STRUCT_PNG) |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 368 | size = png_sizeof(png_struct); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 369 | else |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 370 | return (NULL); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 371 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 372 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 373 | if (malloc_fn != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 374 | { |
Glenn Randers-Pehrson | 5cded0b | 2001-11-07 07:10:08 -0600 | [diff] [blame] | 375 | png_struct dummy_struct; |
| 376 | png_structp png_ptr = &dummy_struct; |
| 377 | png_ptr->mem_ptr=mem_ptr; |
Glenn Randers-Pehrson | ae498dc | 2001-11-24 14:53:31 -0600 | [diff] [blame] | 378 | struct_ptr = (*(malloc_fn))(png_ptr, size); |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 379 | if (struct_ptr != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 380 | png_memset(struct_ptr, 0, size); |
| 381 | return (struct_ptr); |
| 382 | } |
| 383 | #endif /* PNG_USER_MEM_SUPPORTED */ |
| 384 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 385 | #if defined(__TURBOC__) && !defined(__FLAT__) |
| 386 | struct_ptr = (png_voidp)farmalloc(size); |
| 387 | #else |
| 388 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
| 389 | struct_ptr = (png_voidp)halloc(size, 1); |
| 390 | # else |
| 391 | struct_ptr = (png_voidp)malloc(size); |
| 392 | # endif |
| 393 | #endif |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 394 | if (struct_ptr != NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 395 | png_memset(struct_ptr, 0, size); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 396 | |
| 397 | return (struct_ptr); |
| 398 | } |
| 399 | |
| 400 | |
| 401 | /* Free memory allocated by a png_create_struct() call */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 402 | void /* PRIVATE */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 403 | png_destroy_struct(png_voidp struct_ptr) |
| 404 | { |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 405 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 406 | png_destroy_struct_2(struct_ptr, NULL, NULL); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | /* Free memory allocated by a png_create_struct() call */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 410 | void /* PRIVATE */ |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 411 | png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, |
| 412 | png_voidp mem_ptr) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 413 | { |
| 414 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 415 | if (struct_ptr != NULL) |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 416 | { |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 417 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 418 | if (free_fn != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 419 | { |
| 420 | png_struct dummy_struct; |
| 421 | png_structp png_ptr = &dummy_struct; |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 422 | png_ptr->mem_ptr=mem_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 423 | (*(free_fn))(png_ptr, struct_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 424 | return; |
| 425 | } |
| 426 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 427 | #if defined(__TURBOC__) && !defined(__FLAT__) |
| 428 | farfree(struct_ptr); |
| 429 | #else |
| 430 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
| 431 | hfree(struct_ptr); |
| 432 | # else |
| 433 | free(struct_ptr); |
| 434 | # endif |
| 435 | #endif |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 436 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 437 | } |
| 438 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 439 | /* 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] | 440 | * 64K. However, zlib may allocate more then 64K if you don't tell |
| 441 | * it not to. See zconf.h and png.h for more information. zlib does |
| 442 | * need to allocate exactly 64K, so whatever you call here must |
| 443 | * have the ability to do that. |
| 444 | */ |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 445 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 446 | png_voidp PNGAPI |
Glenn Randers-Pehrson | 79134c6 | 2009-02-14 10:32:18 -0600 | [diff] [blame] | 447 | png_calloc(png_structp png_ptr, png_alloc_size_t size) |
| 448 | { |
| 449 | png_voidp ret; |
| 450 | |
| 451 | ret = (png_malloc(png_ptr, size)); |
| 452 | if (ret != NULL) |
| 453 | png_memset(ret,0,(png_size_t)size); |
| 454 | return (ret); |
| 455 | } |
| 456 | |
| 457 | png_voidp PNGAPI |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 458 | png_malloc(png_structp png_ptr, png_alloc_size_t size) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 459 | { |
| 460 | png_voidp ret; |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 461 | |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 462 | #ifdef PNG_USER_MEM_SUPPORTED |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 463 | if (png_ptr == NULL || size == 0) |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 464 | return (NULL); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 465 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 466 | if (png_ptr->malloc_fn != NULL) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 467 | ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 468 | else |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 469 | ret = (png_malloc_default(png_ptr, size)); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 470 | 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] | 471 | png_error(png_ptr, "Out of Memory"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 472 | return (ret); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 473 | } |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 474 | |
Glenn Randers-Pehrson | 73d57cb | 2002-03-25 18:49:08 -0600 | [diff] [blame] | 475 | png_voidp PNGAPI |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 476 | png_malloc_default(png_structp png_ptr, png_alloc_size_t size) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 477 | { |
| 478 | png_voidp ret; |
| 479 | #endif /* PNG_USER_MEM_SUPPORTED */ |
| 480 | |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 481 | if (png_ptr == NULL || size == 0) |
| 482 | return (NULL); |
| 483 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 484 | #ifdef PNG_MAX_MALLOC_64K |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 485 | if (size > (png_uint_32)65536L) |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 486 | { |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 487 | #ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 488 | if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 489 | png_error(png_ptr, "Cannot Allocate > 64K"); |
| 490 | else |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 491 | #endif |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 492 | return NULL; |
| 493 | } |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 494 | #endif |
| 495 | |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 496 | /* Check for overflow */ |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 497 | #if defined(__TURBOC__) && !defined(__FLAT__) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 498 | if (size != (unsigned long)size) |
| 499 | ret = NULL; |
| 500 | else |
| 501 | ret = farmalloc(size); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 502 | #else |
| 503 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 504 | if (size != (unsigned long)size) |
| 505 | ret = NULL; |
| 506 | else |
| 507 | ret = halloc(size, 1); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 508 | # else |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 509 | if (size != (size_t)size) |
| 510 | ret = NULL; |
| 511 | else |
| 512 | ret = malloc((size_t)size); |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 513 | # endif |
| 514 | #endif |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 515 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 516 | #ifndef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 517 | 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] | 518 | png_error(png_ptr, "Out of Memory"); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 519 | #endif |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 520 | |
Glenn Randers-Pehrson | b212002 | 1998-01-31 20:07:59 -0600 | [diff] [blame] | 521 | return (ret); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 522 | } |
| 523 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 524 | /* 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] | 525 | * without taking any action. |
| 526 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 527 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 528 | png_free(png_structp png_ptr, png_voidp ptr) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 529 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 530 | if (png_ptr == NULL || ptr == NULL) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 531 | return; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 532 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 533 | #ifdef PNG_USER_MEM_SUPPORTED |
| 534 | if (png_ptr->free_fn != NULL) |
| 535 | { |
| 536 | (*(png_ptr->free_fn))(png_ptr, ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 537 | return; |
| 538 | } |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 539 | else |
| 540 | png_free_default(png_ptr, ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 541 | } |
Glenn Randers-Pehrson | 73d57cb | 2002-03-25 18:49:08 -0600 | [diff] [blame] | 542 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 543 | png_free_default(png_structp png_ptr, png_voidp ptr) |
| 544 | { |
Glenn Randers-Pehrson | 6d8f3b0 | 1999-10-23 08:39:18 -0500 | [diff] [blame] | 545 | if (png_ptr == NULL || ptr == NULL) |
| 546 | return; |
| 547 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 548 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 549 | |
| 550 | #if defined(__TURBOC__) && !defined(__FLAT__) |
| 551 | farfree(ptr); |
| 552 | #else |
| 553 | # if defined(_MSC_VER) && defined(MAXSEG_64K) |
| 554 | hfree(ptr); |
| 555 | # else |
| 556 | free(ptr); |
| 557 | # endif |
| 558 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 559 | } |
| 560 | |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 561 | #endif /* Not Borland DOS special memory handler */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 562 | |
Glenn Randers-Pehrson | 2ae022d | 2002-07-01 22:23:46 -0500 | [diff] [blame] | 563 | /* 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] | 564 | * function will set up png_malloc() to issue a png_warning and return NULL |
| 565 | * instead of issuing a png_error, if it fails to allocate the requested |
| 566 | * memory. |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 567 | */ |
| 568 | png_voidp PNGAPI |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 569 | png_malloc_warn(png_structp png_ptr, png_alloc_size_t size) |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 570 | { |
| 571 | png_voidp ptr; |
Glenn Randers-Pehrson | ae4bd5c | 2006-11-16 20:35:49 -0600 | [diff] [blame] | 572 | png_uint_32 save_flags; |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 573 | if (png_ptr == NULL) |
| 574 | return (NULL); |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 575 | |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 576 | save_flags = png_ptr->flags; |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 577 | png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; |
| 578 | ptr = (png_voidp)png_malloc((png_structp)png_ptr, size); |
| 579 | png_ptr->flags=save_flags; |
| 580 | return(ptr); |
| 581 | } |
| 582 | |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 583 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 584 | #ifdef PNG_USER_MEM_SUPPORTED |
| 585 | /* This function is called when the application wants to use another method |
| 586 | * of allocating and freeing memory. |
| 587 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 588 | void PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 589 | png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr |
| 590 | malloc_fn, png_free_ptr free_fn) |
| 591 | { |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 592 | if (png_ptr != NULL) |
| 593 | { |
| 594 | png_ptr->mem_ptr = mem_ptr; |
| 595 | png_ptr->malloc_fn = malloc_fn; |
| 596 | png_ptr->free_fn = free_fn; |
Glenn Randers-Pehrson | 6b12c08 | 2006-11-14 10:53:30 -0600 | [diff] [blame] | 597 | } |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 598 | } |
| 599 | |
| 600 | /* This function returns a pointer to the mem_ptr associated with the user |
| 601 | * functions. The application should free any memory associated with this |
| 602 | * pointer before png_write_destroy and png_read_destroy are called. |
| 603 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 604 | png_voidp PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 605 | png_get_mem_ptr(png_structp png_ptr) |
| 606 | { |
Glenn Randers-Pehrson glennrp@comcast.net | b1c0d33 | 2009-05-15 20:39:34 -0500 | [diff] [blame] | 607 | if (png_ptr == NULL) |
| 608 | return (NULL); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 609 | return ((png_voidp)png_ptr->mem_ptr); |
| 610 | } |
| 611 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 612 | #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |