The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1 | |
| 2 | /* pngconf.h - machine configurable file for libpng |
| 3 | * |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 4 | * libpng version 1.6.10 - March 6, 2014 |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 5 | * |
| 6 | * Copyright (c) 1998-2013 Glenn Randers-Pehrson |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 7 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 8 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 9 | * |
| 10 | * This code is released under the libpng license. |
| 11 | * For conditions of distribution and use, see the disclaimer |
| 12 | * and license in png.h |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 13 | * |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | /* Any machine specific code is near the front of this file, so if you |
| 17 | * are configuring libpng for a machine, you may want to read the section |
| 18 | * starting here down to where it starts to typedef png_color, png_text, |
| 19 | * and png_info. |
| 20 | */ |
| 21 | |
| 22 | #ifndef PNGCONF_H |
| 23 | #define PNGCONF_H |
| 24 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 25 | /* To do: Do all of this in scripts/pnglibconf.dfa */ |
| 26 | #ifdef PNG_SAFE_LIMITS_SUPPORTED |
| 27 | # ifdef PNG_USER_WIDTH_MAX |
| 28 | # undef PNG_USER_WIDTH_MAX |
| 29 | # define PNG_USER_WIDTH_MAX 1000000L |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 30 | # endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 31 | # ifdef PNG_USER_HEIGHT_MAX |
| 32 | # undef PNG_USER_HEIGHT_MAX |
| 33 | # define PNG_USER_HEIGHT_MAX 1000000L |
| 34 | # endif |
| 35 | # ifdef PNG_USER_CHUNK_MALLOC_MAX |
| 36 | # undef PNG_USER_CHUNK_MALLOC_MAX |
| 37 | # define PNG_USER_CHUNK_MALLOC_MAX 4000000L |
| 38 | # endif |
| 39 | # ifdef PNG_USER_CHUNK_CACHE_MAX |
| 40 | # undef PNG_USER_CHUNK_CACHE_MAX |
| 41 | # define PNG_USER_CHUNK_CACHE_MAX 128 |
| 42 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 43 | #endif |
| 44 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 45 | #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 46 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 47 | /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C |
| 48 | * compiler for correct compilation. The following header files are required by |
| 49 | * the standard. If your compiler doesn't provide these header files, or they |
| 50 | * do not match the standard, you will need to provide/improve them. |
| 51 | */ |
| 52 | #include <limits.h> |
| 53 | #include <stddef.h> |
| 54 | |
| 55 | /* Library header files. These header files are all defined by ISOC90; libpng |
| 56 | * expects conformant implementations, however, an ISOC90 conformant system need |
| 57 | * not provide these header files if the functionality cannot be implemented. |
| 58 | * In this case it will be necessary to disable the relevant parts of libpng in |
| 59 | * the build of pnglibconf.h. |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 60 | * |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 61 | * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not |
| 62 | * include this unnecessary header file. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 63 | */ |
| 64 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 65 | #ifdef PNG_STDIO_SUPPORTED |
| 66 | /* Required for the definition of FILE: */ |
| 67 | # include <stdio.h> |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 68 | #endif |
| 69 | |
| 70 | #ifdef PNG_SETJMP_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 71 | /* Required for the definition of jmp_buf and the declaration of longjmp: */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 72 | # include <setjmp.h> |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 73 | #endif |
| 74 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 75 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 76 | /* Required for struct tm: */ |
| 77 | # include <time.h> |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 78 | #endif |
| 79 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 80 | #endif /* PNG_BUILDING_SYMBOL_TABLE */ |
| 81 | |
| 82 | /* Prior to 1.6.0 it was possible to turn off 'const' in declarations using |
| 83 | * PNG_NO_CONST; this is no longer supported except for data declarations which |
| 84 | * apparently still cause problems in 2011 on some compilers. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 85 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 86 | #define PNG_CONST const /* backward compatibility only */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 87 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 88 | /* This controls optimization of the reading of 16 and 32 bit values |
| 89 | * from PNG files. It can be set on a per-app-file basis - it |
| 90 | * just changes whether a macro is used when the function is called. |
| 91 | * The library builder sets the default; if read functions are not |
| 92 | * built into the library the macro implementation is forced on. |
| 93 | */ |
| 94 | #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED |
| 95 | # define PNG_USE_READ_MACROS |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 96 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 97 | #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) |
| 98 | # if PNG_DEFAULT_READ_MACROS |
| 99 | # define PNG_USE_READ_MACROS |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 100 | # endif |
| 101 | #endif |
| 102 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 103 | /* COMPILER SPECIFIC OPTIONS. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 104 | * |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 105 | * These options are provided so that a variety of difficult compilers |
| 106 | * can be used. Some are fixed at build time (e.g. PNG_API_RULE |
| 107 | * below) but still have compiler specific implementations, others |
| 108 | * may be changed on a per-file basis when compiling against libpng. |
| 109 | */ |
| 110 | |
| 111 | /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect |
| 112 | * against legacy (pre ISOC90) compilers that did not understand function |
| 113 | * prototypes. It is not required for modern C compilers. |
| 114 | */ |
| 115 | #ifndef PNGARG |
| 116 | # define PNGARG(arglist) arglist |
| 117 | #endif |
| 118 | |
| 119 | /* Function calling conventions. |
| 120 | * ============================= |
| 121 | * Normally it is not necessary to specify to the compiler how to call |
| 122 | * a function - it just does it - however on x86 systems derived from |
| 123 | * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems |
| 124 | * and some others) there are multiple ways to call a function and the |
| 125 | * default can be changed on the compiler command line. For this reason |
| 126 | * libpng specifies the calling convention of every exported function and |
| 127 | * every function called via a user supplied function pointer. This is |
| 128 | * done in this file by defining the following macros: |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 129 | * |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 130 | * PNGAPI Calling convention for exported functions. |
| 131 | * PNGCBAPI Calling convention for user provided (callback) functions. |
| 132 | * PNGCAPI Calling convention used by the ANSI-C library (required |
| 133 | * for longjmp callbacks and sometimes used internally to |
| 134 | * specify the calling convention for zlib). |
| 135 | * |
| 136 | * These macros should never be overridden. If it is necessary to |
| 137 | * change calling convention in a private build this can be done |
| 138 | * by setting PNG_API_RULE (which defaults to 0) to one of the values |
| 139 | * below to select the correct 'API' variants. |
| 140 | * |
| 141 | * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. |
| 142 | * This is correct in every known environment. |
| 143 | * PNG_API_RULE=1 Use the operating system convention for PNGAPI and |
| 144 | * the 'C' calling convention (from PNGCAPI) for |
| 145 | * callbacks (PNGCBAPI). This is no longer required |
| 146 | * in any known environment - if it has to be used |
| 147 | * please post an explanation of the problem to the |
| 148 | * libpng mailing list. |
| 149 | * |
| 150 | * These cases only differ if the operating system does not use the C |
| 151 | * calling convention, at present this just means the above cases |
| 152 | * (x86 DOS/Windows sytems) and, even then, this does not apply to |
| 153 | * Cygwin running on those systems. |
| 154 | * |
| 155 | * Note that the value must be defined in pnglibconf.h so that what |
| 156 | * the application uses to call the library matches the conventions |
| 157 | * set when building the library. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 158 | */ |
| 159 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 160 | /* Symbol export |
| 161 | * ============= |
| 162 | * When building a shared library it is almost always necessary to tell |
| 163 | * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' |
| 164 | * is used to mark the symbols. On some systems these symbols can be |
| 165 | * extracted at link time and need no special processing by the compiler, |
| 166 | * on other systems the symbols are flagged by the compiler and just |
| 167 | * the declaration requires a special tag applied (unfortunately) in a |
| 168 | * compiler dependent way. Some systems can do either. |
| 169 | * |
| 170 | * A small number of older systems also require a symbol from a DLL to |
| 171 | * be flagged to the program that calls it. This is a problem because |
| 172 | * we do not know in the header file included by application code that |
| 173 | * the symbol will come from a shared library, as opposed to a statically |
| 174 | * linked one. For this reason the application must tell us by setting |
| 175 | * the magic flag PNG_USE_DLL to turn on the special processing before |
| 176 | * it includes png.h. |
| 177 | * |
| 178 | * Four additional macros are used to make this happen: |
| 179 | * |
| 180 | * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from |
| 181 | * the build or imported if PNG_USE_DLL is set - compiler |
| 182 | * and system specific. |
| 183 | * |
| 184 | * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to |
| 185 | * 'type', compiler specific. |
| 186 | * |
| 187 | * PNG_DLL_EXPORT Set to the magic to use during a libpng build to |
| 188 | * make a symbol exported from the DLL. Not used in the |
| 189 | * public header files; see pngpriv.h for how it is used |
| 190 | * in the libpng build. |
| 191 | * |
| 192 | * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come |
| 193 | * from a DLL - used to define PNG_IMPEXP when |
| 194 | * PNG_USE_DLL is set. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 195 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 196 | |
| 197 | /* System specific discovery. |
| 198 | * ========================== |
| 199 | * This code is used at build time to find PNG_IMPEXP, the API settings |
| 200 | * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL |
| 201 | * import processing is possible. On Windows systems it also sets |
| 202 | * compiler-specific macros to the values required to change the calling |
| 203 | * conventions of the various functions. |
| 204 | */ |
| 205 | #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ |
| 206 | defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) |
| 207 | /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or |
| 208 | * MinGW on any architecture currently supported by Windows. Also includes |
| 209 | * Watcom builds but these need special treatment because they are not |
| 210 | * compatible with GCC or Visual C because of different calling conventions. |
| 211 | */ |
| 212 | # if PNG_API_RULE == 2 |
| 213 | /* If this line results in an error, either because __watcall is not |
| 214 | * understood or because of a redefine just below you cannot use *this* |
| 215 | * build of the library with the compiler you are using. *This* build was |
| 216 | * build using Watcom and applications must also be built using Watcom! |
| 217 | */ |
| 218 | # define PNGCAPI __watcall |
| 219 | # endif |
| 220 | |
| 221 | # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800)) |
| 222 | # define PNGCAPI __cdecl |
| 223 | # if PNG_API_RULE == 1 |
| 224 | /* If this line results in an error __stdcall is not understood and |
| 225 | * PNG_API_RULE should not have been set to '1'. |
| 226 | */ |
| 227 | # define PNGAPI __stdcall |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 228 | # endif |
| 229 | # else |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 230 | /* An older compiler, or one not detected (erroneously) above, |
| 231 | * if necessary override on the command line to get the correct |
| 232 | * variants for the compiler. |
| 233 | */ |
| 234 | # ifndef PNGCAPI |
| 235 | # define PNGCAPI _cdecl |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 236 | # endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 237 | # if PNG_API_RULE == 1 && !defined(PNGAPI) |
| 238 | # define PNGAPI _stdcall |
| 239 | # endif |
| 240 | # endif /* compiler/api */ |
| 241 | |
| 242 | /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ |
| 243 | |
| 244 | # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) |
| 245 | # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed" |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 246 | # endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 247 | |
| 248 | # if (defined(_MSC_VER) && _MSC_VER < 800) ||\ |
| 249 | (defined(__BORLANDC__) && __BORLANDC__ < 0x500) |
| 250 | /* older Borland and MSC |
| 251 | * compilers used '__export' and required this to be after |
| 252 | * the type. |
| 253 | */ |
| 254 | # ifndef PNG_EXPORT_TYPE |
| 255 | # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP |
| 256 | # endif |
| 257 | # define PNG_DLL_EXPORT __export |
| 258 | # else /* newer compiler */ |
| 259 | # define PNG_DLL_EXPORT __declspec(dllexport) |
| 260 | # ifndef PNG_DLL_IMPORT |
| 261 | # define PNG_DLL_IMPORT __declspec(dllimport) |
| 262 | # endif |
| 263 | # endif /* compiler */ |
| 264 | |
| 265 | #else /* !Windows */ |
| 266 | # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) |
| 267 | # define PNGAPI _System |
| 268 | # else /* !Windows/x86 && !OS/2 */ |
| 269 | /* Use the defaults, or define PNG*API on the command line (but |
| 270 | * this will have to be done for every compile!) |
| 271 | */ |
| 272 | # endif /* other system, !OS/2 */ |
| 273 | #endif /* !Windows/x86 */ |
| 274 | |
| 275 | /* Now do all the defaulting . */ |
| 276 | #ifndef PNGCAPI |
| 277 | # define PNGCAPI |
| 278 | #endif |
| 279 | #ifndef PNGCBAPI |
| 280 | # define PNGCBAPI PNGCAPI |
| 281 | #endif |
| 282 | #ifndef PNGAPI |
| 283 | # define PNGAPI PNGCAPI |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 284 | #endif |
| 285 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 286 | /* PNG_IMPEXP may be set on the compilation system command line or (if not set) |
| 287 | * then in an internal header file when building the library, otherwise (when |
| 288 | * using the library) it is set here. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 289 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 290 | #ifndef PNG_IMPEXP |
| 291 | # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) |
| 292 | /* This forces use of a DLL, disallowing static linking */ |
| 293 | # define PNG_IMPEXP PNG_DLL_IMPORT |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 294 | # endif |
| 295 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 296 | # ifndef PNG_IMPEXP |
Jim Huang | 1cb15eb | 2010-08-08 15:11:37 +0800 | [diff] [blame] | 297 | # define PNG_IMPEXP |
| 298 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 299 | #endif |
| 300 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 301 | /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat |
| 302 | * 'attributes' as a storage class - the attributes go at the start of the |
| 303 | * function definition, and attributes are always appended regardless of the |
| 304 | * compiler. This considerably simplifies these macros but may cause problems |
| 305 | * if any compilers both need function attributes and fail to handle them as |
| 306 | * a storage class (this is unlikely.) |
| 307 | */ |
| 308 | #ifndef PNG_FUNCTION |
| 309 | # define PNG_FUNCTION(type, name, args, attributes) attributes type name args |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 310 | #endif |
| 311 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 312 | #ifndef PNG_EXPORT_TYPE |
| 313 | # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 314 | #endif |
| 315 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 316 | /* The ordinal value is only relevant when preprocessing png.h for symbol |
| 317 | * table entries, so we discard it here. See the .dfn files in the |
| 318 | * scripts directory. |
| 319 | */ |
| 320 | #ifndef PNG_EXPORTA |
| 321 | |
| 322 | # define PNG_EXPORTA(ordinal, type, name, args, attributes)\ |
| 323 | PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ |
| 324 | extern attributes) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 325 | #endif |
| 326 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 327 | /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, |
| 328 | * so make something non-empty to satisfy the requirement: |
| 329 | */ |
| 330 | #define PNG_EMPTY /*empty list*/ |
| 331 | |
| 332 | #define PNG_EXPORT(ordinal, type, name, args)\ |
| 333 | PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) |
| 334 | |
| 335 | /* Use PNG_REMOVED to comment out a removed interface. */ |
| 336 | #ifndef PNG_REMOVED |
| 337 | # define PNG_REMOVED(ordinal, type, name, args, attributes) |
| 338 | #endif |
| 339 | |
| 340 | #ifndef PNG_CALLBACK |
| 341 | # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) |
| 342 | #endif |
| 343 | |
| 344 | /* Support for compiler specific function attributes. These are used |
| 345 | * so that where compiler support is available incorrect use of API |
| 346 | * functions in png.h will generate compiler warnings. |
| 347 | * |
| 348 | * Added at libpng-1.2.41. |
| 349 | */ |
| 350 | |
| 351 | #ifndef PNG_NO_PEDANTIC_WARNINGS |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 352 | # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED |
| 353 | # define PNG_PEDANTIC_WARNINGS_SUPPORTED |
| 354 | # endif |
| 355 | #endif |
| 356 | |
| 357 | #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 358 | /* Support for compiler specific function attributes. These are used |
| 359 | * so that where compiler support is available, incorrect use of API |
| 360 | * functions in png.h will generate compiler warnings. Added at libpng |
| 361 | * version 1.2.41. Disabling these removes the warnings but may also produce |
| 362 | * less efficient code. |
| 363 | */ |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 364 | # if defined(__clang__) |
| 365 | /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */ |
| 366 | # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__) |
| 367 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) |
| 368 | # endif |
| 369 | # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__) |
| 370 | # define PNG_NORETURN __attribute__((__noreturn__)) |
| 371 | # endif |
| 372 | # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__) |
| 373 | # define PNG_ALLOCATED __attribute__((__malloc__)) |
| 374 | # endif |
| 375 | # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__) |
| 376 | # define PNG_DEPRECATED __attribute__((__deprecated__)) |
| 377 | # endif |
| 378 | # if !defined(PNG_PRIVATE) |
| 379 | # ifdef __has_extension |
| 380 | # if __has_extension(attribute_unavailable_with_message) |
| 381 | # define PNG_PRIVATE __attribute__((__unavailable__(\ |
| 382 | "This function is not exported by libpng."))) |
| 383 | # endif |
| 384 | # endif |
| 385 | # endif |
| 386 | # ifndef PNG_RESTRICT |
| 387 | # define PNG_RESTRICT __restrict |
| 388 | # endif |
| 389 | |
| 390 | # elif defined(__GNUC__) |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 391 | # ifndef PNG_USE_RESULT |
| 392 | # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) |
| 393 | # endif |
| 394 | # ifndef PNG_NORETURN |
| 395 | # define PNG_NORETURN __attribute__((__noreturn__)) |
| 396 | # endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 397 | # if __GNUC__ >= 3 |
| 398 | # ifndef PNG_ALLOCATED |
| 399 | # define PNG_ALLOCATED __attribute__((__malloc__)) |
| 400 | # endif |
| 401 | # ifndef PNG_DEPRECATED |
| 402 | # define PNG_DEPRECATED __attribute__((__deprecated__)) |
| 403 | # endif |
| 404 | # ifndef PNG_PRIVATE |
| 405 | # if 0 /* Doesn't work so we use deprecated instead*/ |
| 406 | # define PNG_PRIVATE \ |
| 407 | __attribute__((warning("This function is not exported by libpng."))) |
| 408 | # else |
| 409 | # define PNG_PRIVATE \ |
| 410 | __attribute__((__deprecated__)) |
| 411 | # endif |
| 412 | # endif |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 413 | # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1)) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 414 | # ifndef PNG_RESTRICT |
| 415 | # define PNG_RESTRICT __restrict |
| 416 | # endif |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 417 | # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */ |
| 418 | # endif /* __GNUC__ >= 3 */ |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 419 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 420 | # elif defined(_MSC_VER) && (_MSC_VER >= 1300) |
| 421 | # ifndef PNG_USE_RESULT |
| 422 | # define PNG_USE_RESULT /* not supported */ |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 423 | # endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 424 | # ifndef PNG_NORETURN |
| 425 | # define PNG_NORETURN __declspec(noreturn) |
| 426 | # endif |
| 427 | # ifndef PNG_ALLOCATED |
| 428 | # if (_MSC_VER >= 1400) |
| 429 | # define PNG_ALLOCATED __declspec(restrict) |
| 430 | # endif |
| 431 | # endif |
| 432 | # ifndef PNG_DEPRECATED |
| 433 | # define PNG_DEPRECATED __declspec(deprecated) |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 434 | # endif |
| 435 | # ifndef PNG_PRIVATE |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 436 | # define PNG_PRIVATE __declspec(deprecated) |
| 437 | # endif |
| 438 | # ifndef PNG_RESTRICT |
| 439 | # if (_MSC_VER >= 1400) |
| 440 | # define PNG_RESTRICT __restrict |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 441 | # endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 442 | # endif |
| 443 | |
| 444 | # elif defined(__WATCOMC__) |
| 445 | # ifndef PNG_RESTRICT |
| 446 | # define PNG_RESTRICT __restrict |
| 447 | # endif |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 448 | # endif |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 449 | #endif /* PNG_PEDANTIC_WARNINGS */ |
| 450 | |
| 451 | #ifndef PNG_DEPRECATED |
| 452 | # define PNG_DEPRECATED /* Use of this function is deprecated */ |
| 453 | #endif |
| 454 | #ifndef PNG_USE_RESULT |
| 455 | # define PNG_USE_RESULT /* The result of this function must be checked */ |
| 456 | #endif |
| 457 | #ifndef PNG_NORETURN |
| 458 | # define PNG_NORETURN /* This function does not return */ |
| 459 | #endif |
| 460 | #ifndef PNG_ALLOCATED |
| 461 | # define PNG_ALLOCATED /* The result of the function is new memory */ |
| 462 | #endif |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 463 | #ifndef PNG_PRIVATE |
| 464 | # define PNG_PRIVATE /* This is a private libpng function */ |
| 465 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 466 | #ifndef PNG_RESTRICT |
| 467 | # define PNG_RESTRICT /* The C99 "restrict" feature */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 468 | #endif |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 469 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 470 | #ifndef PNG_FP_EXPORT /* A floating point API. */ |
| 471 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
| 472 | # define PNG_FP_EXPORT(ordinal, type, name, args)\ |
| 473 | PNG_EXPORT(ordinal, type, name, args); |
| 474 | # else /* No floating point APIs */ |
| 475 | # define PNG_FP_EXPORT(ordinal, type, name, args) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 476 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 477 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 478 | #ifndef PNG_FIXED_EXPORT /* A fixed point API. */ |
| 479 | # ifdef PNG_FIXED_POINT_SUPPORTED |
| 480 | # define PNG_FIXED_EXPORT(ordinal, type, name, args)\ |
| 481 | PNG_EXPORT(ordinal, type, name, args); |
| 482 | # else /* No fixed point APIs */ |
| 483 | # define PNG_FIXED_EXPORT(ordinal, type, name, args) |
| 484 | # endif |
| 485 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 486 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 487 | #ifndef PNG_BUILDING_SYMBOL_TABLE |
| 488 | /* Some typedefs to get us started. These should be safe on most of the common |
| 489 | * platforms. |
| 490 | * |
| 491 | * png_uint_32 and png_int_32 may, currently, be larger than required to hold a |
| 492 | * 32-bit value however this is not normally advisable. |
| 493 | * |
| 494 | * png_uint_16 and png_int_16 should always be two bytes in size - this is |
| 495 | * verified at library build time. |
| 496 | * |
| 497 | * png_byte must always be one byte in size. |
| 498 | * |
| 499 | * The checks below use constants from limits.h, as defined by the ISOC90 |
| 500 | * standard. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 501 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 502 | #if CHAR_BIT == 8 && UCHAR_MAX == 255 |
| 503 | typedef unsigned char png_byte; |
| 504 | #else |
| 505 | # error "libpng requires 8 bit bytes" |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 506 | #endif |
| 507 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 508 | #if INT_MIN == -32768 && INT_MAX == 32767 |
| 509 | typedef int png_int_16; |
| 510 | #elif SHRT_MIN == -32768 && SHRT_MAX == 32767 |
| 511 | typedef short png_int_16; |
| 512 | #else |
| 513 | # error "libpng requires a signed 16 bit type" |
| 514 | #endif |
| 515 | |
| 516 | #if UINT_MAX == 65535 |
| 517 | typedef unsigned int png_uint_16; |
| 518 | #elif USHRT_MAX == 65535 |
| 519 | typedef unsigned short png_uint_16; |
| 520 | #else |
| 521 | # error "libpng requires an unsigned 16 bit type" |
| 522 | #endif |
| 523 | |
| 524 | #if INT_MIN < -2147483646 && INT_MAX > 2147483646 |
| 525 | typedef int png_int_32; |
| 526 | #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646 |
| 527 | typedef long int png_int_32; |
| 528 | #else |
| 529 | # error "libpng requires a signed 32 bit (or more) type" |
| 530 | #endif |
| 531 | |
| 532 | #if UINT_MAX > 4294967294 |
| 533 | typedef unsigned int png_uint_32; |
| 534 | #elif ULONG_MAX > 4294967294 |
| 535 | typedef unsigned long int png_uint_32; |
| 536 | #else |
| 537 | # error "libpng requires an unsigned 32 bit (or more) type" |
| 538 | #endif |
| 539 | |
| 540 | /* Prior to 1.6.0 it was possible to disable the use of size_t, 1.6.0, however, |
| 541 | * requires an ISOC90 compiler and relies on consistent behavior of sizeof. |
| 542 | */ |
| 543 | typedef size_t png_size_t; |
| 544 | typedef ptrdiff_t png_ptrdiff_t; |
| 545 | |
| 546 | /* libpng needs to know the maximum value of 'size_t' and this controls the |
| 547 | * definition of png_alloc_size_t, below. This maximum value of size_t limits |
| 548 | * but does not control the maximum allocations the library makes - there is |
| 549 | * direct application control of this through png_set_user_limits(). |
| 550 | */ |
| 551 | #ifndef PNG_SMALL_SIZE_T |
| 552 | /* Compiler specific tests for systems where size_t is known to be less than |
| 553 | * 32 bits (some of these systems may no longer work because of the lack of |
| 554 | * 'far' support; see above.) |
| 555 | */ |
| 556 | # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\ |
| 557 | (defined(_MSC_VER) && defined(MAXSEG_64K)) |
| 558 | # define PNG_SMALL_SIZE_T |
| 559 | # endif |
| 560 | #endif |
| 561 | |
| 562 | /* png_alloc_size_t is guaranteed to be no smaller than png_size_t, and no |
| 563 | * smaller than png_uint_32. Casts from png_size_t or png_uint_32 to |
| 564 | * png_alloc_size_t are not necessary; in fact, it is recommended not to use |
| 565 | * them at all so that the compiler can complain when something turns out to be |
| 566 | * problematic. |
| 567 | * |
| 568 | * Casts in the other direction (from png_alloc_size_t to png_size_t or |
| 569 | * png_uint_32) should be explicitly applied; however, we do not expect to |
| 570 | * encounter practical situations that require such conversions. |
| 571 | * |
| 572 | * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than |
| 573 | * 4294967295 - i.e. less than the maximum value of png_uint_32. |
| 574 | */ |
| 575 | #ifdef PNG_SMALL_SIZE_T |
| 576 | typedef png_uint_32 png_alloc_size_t; |
| 577 | #else |
| 578 | typedef png_size_t png_alloc_size_t; |
| 579 | #endif |
| 580 | |
| 581 | /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler |
| 582 | * implementations of Intel CPU specific support of user-mode segmented address |
| 583 | * spaces, where 16-bit pointers address more than 65536 bytes of memory using |
| 584 | * separate 'segment' registers. The implementation requires two different |
| 585 | * types of pointer (only one of which includes the segment value.) |
| 586 | * |
| 587 | * If required this support is available in version 1.2 of libpng and may be |
| 588 | * available in versions through 1.5, although the correctness of the code has |
| 589 | * not been verified recently. |
| 590 | */ |
| 591 | |
| 592 | /* Typedef for floating-point numbers that are converted to fixed-point with a |
| 593 | * multiple of 100,000, e.g., gamma |
| 594 | */ |
| 595 | typedef png_int_32 png_fixed_point; |
| 596 | |
| 597 | /* Add typedefs for pointers */ |
| 598 | typedef void * png_voidp; |
| 599 | typedef const void * png_const_voidp; |
| 600 | typedef png_byte * png_bytep; |
| 601 | typedef const png_byte * png_const_bytep; |
| 602 | typedef png_uint_32 * png_uint_32p; |
| 603 | typedef const png_uint_32 * png_const_uint_32p; |
| 604 | typedef png_int_32 * png_int_32p; |
| 605 | typedef const png_int_32 * png_const_int_32p; |
| 606 | typedef png_uint_16 * png_uint_16p; |
| 607 | typedef const png_uint_16 * png_const_uint_16p; |
| 608 | typedef png_int_16 * png_int_16p; |
| 609 | typedef const png_int_16 * png_const_int_16p; |
| 610 | typedef char * png_charp; |
| 611 | typedef const char * png_const_charp; |
| 612 | typedef png_fixed_point * png_fixed_point_p; |
| 613 | typedef const png_fixed_point * png_const_fixed_point_p; |
| 614 | typedef png_size_t * png_size_tp; |
| 615 | typedef const png_size_t * png_const_size_tp; |
| 616 | |
| 617 | #ifdef PNG_STDIO_SUPPORTED |
| 618 | typedef FILE * png_FILE_p; |
| 619 | #endif |
| 620 | |
| 621 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
| 622 | typedef double * png_doublep; |
| 623 | typedef const double * png_const_doublep; |
| 624 | #endif |
| 625 | |
| 626 | /* Pointers to pointers; i.e. arrays */ |
| 627 | typedef png_byte * * png_bytepp; |
| 628 | typedef png_uint_32 * * png_uint_32pp; |
| 629 | typedef png_int_32 * * png_int_32pp; |
| 630 | typedef png_uint_16 * * png_uint_16pp; |
| 631 | typedef png_int_16 * * png_int_16pp; |
| 632 | typedef const char * * png_const_charpp; |
| 633 | typedef char * * png_charpp; |
| 634 | typedef png_fixed_point * * png_fixed_point_pp; |
| 635 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
| 636 | typedef double * * png_doublepp; |
| 637 | #endif |
| 638 | |
| 639 | /* Pointers to pointers to pointers; i.e., pointer to array */ |
| 640 | typedef char * * * png_charppp; |
| 641 | |
| 642 | #endif /* PNG_BUILDING_SYMBOL_TABLE */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 643 | |
| 644 | #endif /* PNGCONF_H */ |