Mercurial > repos > rliterman > csp2

annotate CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/include/pngconf.h @ 69:33d812a61356

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
planemo upload commit 2e9511a184a1ca667c7be0c6321a36dc4e3d116d
author jpayne
date Tue, 18 Mar 2025 17:55:14 -0400
parents
children
rev   line source
jpayne@69 1
jpayne@69 2 /* pngconf.h - machine-configurable file for libpng
jpayne@69 3 *
jpayne@69 4 * libpng version 1.6.43
jpayne@69 5 *
jpayne@69 6 * Copyright (c) 2018-2024 Cosmin Truta
jpayne@69 7 * Copyright (c) 1998-2002,2004,2006-2016,2018 Glenn Randers-Pehrson
jpayne@69 8 * Copyright (c) 1996-1997 Andreas Dilger
jpayne@69 9 * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
jpayne@69 10 *
jpayne@69 11 * This code is released under the libpng license.
jpayne@69 12 * For conditions of distribution and use, see the disclaimer
jpayne@69 13 * and license in png.h
jpayne@69 14 *
jpayne@69 15 * Any machine specific code is near the front of this file, so if you
jpayne@69 16 * are configuring libpng for a machine, you may want to read the section
jpayne@69 17 * starting here down to where it starts to typedef png_color, png_text,
jpayne@69 18 * and png_info.
jpayne@69 19 */
jpayne@69 20
jpayne@69 21 #ifndef PNGCONF_H
jpayne@69 22 #define PNGCONF_H
jpayne@69 23
jpayne@69 24 #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
jpayne@69 25
jpayne@69 26 /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
jpayne@69 27 * compiler for correct compilation. The following header files are required by
jpayne@69 28 * the standard. If your compiler doesn't provide these header files, or they
jpayne@69 29 * do not match the standard, you will need to provide/improve them.
jpayne@69 30 */
jpayne@69 31 #include <limits.h>
jpayne@69 32 #include <stddef.h>
jpayne@69 33
jpayne@69 34 /* Library header files. These header files are all defined by ISOC90; libpng
jpayne@69 35 * expects conformant implementations, however, an ISOC90 conformant system need
jpayne@69 36 * not provide these header files if the functionality cannot be implemented.
jpayne@69 37 * In this case it will be necessary to disable the relevant parts of libpng in
jpayne@69 38 * the build of pnglibconf.h.
jpayne@69 39 *
jpayne@69 40 * Prior to 1.6.0 string.h was included here; the API changes in 1.6.0 to not
jpayne@69 41 * include this unnecessary header file.
jpayne@69 42 */
jpayne@69 43
jpayne@69 44 #ifdef PNG_STDIO_SUPPORTED
jpayne@69 45 /* Required for the definition of FILE: */
jpayne@69 46 # include <stdio.h>
jpayne@69 47 #endif
jpayne@69 48
jpayne@69 49 #ifdef PNG_SETJMP_SUPPORTED
jpayne@69 50 /* Required for the definition of jmp_buf and the declaration of longjmp: */
jpayne@69 51 # include <setjmp.h>
jpayne@69 52 #endif
jpayne@69 53
jpayne@69 54 #ifdef PNG_CONVERT_tIME_SUPPORTED
jpayne@69 55 /* Required for struct tm: */
jpayne@69 56 # include <time.h>
jpayne@69 57 #endif
jpayne@69 58
jpayne@69 59 #endif /* PNG_BUILDING_SYMBOL_TABLE */
jpayne@69 60
jpayne@69 61 /* Prior to 1.6.0, it was possible to turn off 'const' in declarations,
jpayne@69 62 * using PNG_NO_CONST. This is no longer supported.
jpayne@69 63 */
jpayne@69 64 #define PNG_CONST const /* backward compatibility only */
jpayne@69 65
jpayne@69 66 /* This controls optimization of the reading of 16-bit and 32-bit
jpayne@69 67 * values from PNG files. It can be set on a per-app-file basis: it
jpayne@69 68 * just changes whether a macro is used when the function is called.
jpayne@69 69 * The library builder sets the default; if read functions are not
jpayne@69 70 * built into the library the macro implementation is forced on.
jpayne@69 71 */
jpayne@69 72 #ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
jpayne@69 73 # define PNG_USE_READ_MACROS
jpayne@69 74 #endif
jpayne@69 75 #if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
jpayne@69 76 # if PNG_DEFAULT_READ_MACROS
jpayne@69 77 # define PNG_USE_READ_MACROS
jpayne@69 78 # endif
jpayne@69 79 #endif
jpayne@69 80
jpayne@69 81 /* COMPILER SPECIFIC OPTIONS.
jpayne@69 82 *
jpayne@69 83 * These options are provided so that a variety of difficult compilers
jpayne@69 84 * can be used. Some are fixed at build time (e.g. PNG_API_RULE
jpayne@69 85 * below) but still have compiler specific implementations, others
jpayne@69 86 * may be changed on a per-file basis when compiling against libpng.
jpayne@69 87 */
jpayne@69 88
jpayne@69 89 /* The PNGARG macro was used in versions of libpng prior to 1.6.0 to protect
jpayne@69 90 * against legacy (pre ISOC90) compilers that did not understand function
jpayne@69 91 * prototypes. It is not required for modern C compilers.
jpayne@69 92 */
jpayne@69 93 #ifndef PNGARG
jpayne@69 94 # define PNGARG(arglist) arglist
jpayne@69 95 #endif
jpayne@69 96
jpayne@69 97 /* Function calling conventions.
jpayne@69 98 * =============================
jpayne@69 99 * Normally it is not necessary to specify to the compiler how to call
jpayne@69 100 * a function - it just does it - however on x86 systems derived from
jpayne@69 101 * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
jpayne@69 102 * and some others) there are multiple ways to call a function and the
jpayne@69 103 * default can be changed on the compiler command line. For this reason
jpayne@69 104 * libpng specifies the calling convention of every exported function and
jpayne@69 105 * every function called via a user supplied function pointer. This is
jpayne@69 106 * done in this file by defining the following macros:
jpayne@69 107 *
jpayne@69 108 * PNGAPI Calling convention for exported functions.
jpayne@69 109 * PNGCBAPI Calling convention for user provided (callback) functions.
jpayne@69 110 * PNGCAPI Calling convention used by the ANSI-C library (required
jpayne@69 111 * for longjmp callbacks and sometimes used internally to
jpayne@69 112 * specify the calling convention for zlib).
jpayne@69 113 *
jpayne@69 114 * These macros should never be overridden. If it is necessary to
jpayne@69 115 * change calling convention in a private build this can be done
jpayne@69 116 * by setting PNG_API_RULE (which defaults to 0) to one of the values
jpayne@69 117 * below to select the correct 'API' variants.
jpayne@69 118 *
jpayne@69 119 * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
jpayne@69 120 * This is correct in every known environment.
jpayne@69 121 * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
jpayne@69 122 * the 'C' calling convention (from PNGCAPI) for
jpayne@69 123 * callbacks (PNGCBAPI). This is no longer required
jpayne@69 124 * in any known environment - if it has to be used
jpayne@69 125 * please post an explanation of the problem to the
jpayne@69 126 * libpng mailing list.
jpayne@69 127 *
jpayne@69 128 * These cases only differ if the operating system does not use the C
jpayne@69 129 * calling convention, at present this just means the above cases
jpayne@69 130 * (x86 DOS/Windows systems) and, even then, this does not apply to
jpayne@69 131 * Cygwin running on those systems.
jpayne@69 132 *
jpayne@69 133 * Note that the value must be defined in pnglibconf.h so that what
jpayne@69 134 * the application uses to call the library matches the conventions
jpayne@69 135 * set when building the library.
jpayne@69 136 */
jpayne@69 137
jpayne@69 138 /* Symbol export
jpayne@69 139 * =============
jpayne@69 140 * When building a shared library it is almost always necessary to tell
jpayne@69 141 * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
jpayne@69 142 * is used to mark the symbols. On some systems these symbols can be
jpayne@69 143 * extracted at link time and need no special processing by the compiler,
jpayne@69 144 * on other systems the symbols are flagged by the compiler and just
jpayne@69 145 * the declaration requires a special tag applied (unfortunately) in a
jpayne@69 146 * compiler dependent way. Some systems can do either.
jpayne@69 147 *
jpayne@69 148 * A small number of older systems also require a symbol from a DLL to
jpayne@69 149 * be flagged to the program that calls it. This is a problem because
jpayne@69 150 * we do not know in the header file included by application code that
jpayne@69 151 * the symbol will come from a shared library, as opposed to a statically
jpayne@69 152 * linked one. For this reason the application must tell us by setting
jpayne@69 153 * the magic flag PNG_USE_DLL to turn on the special processing before
jpayne@69 154 * it includes png.h.
jpayne@69 155 *
jpayne@69 156 * Four additional macros are used to make this happen:
jpayne@69 157 *
jpayne@69 158 * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
jpayne@69 159 * the build or imported if PNG_USE_DLL is set - compiler
jpayne@69 160 * and system specific.
jpayne@69 161 *
jpayne@69 162 * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
jpayne@69 163 * 'type', compiler specific.
jpayne@69 164 *
jpayne@69 165 * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
jpayne@69 166 * make a symbol exported from the DLL. Not used in the
jpayne@69 167 * public header files; see pngpriv.h for how it is used
jpayne@69 168 * in the libpng build.
jpayne@69 169 *
jpayne@69 170 * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
jpayne@69 171 * from a DLL - used to define PNG_IMPEXP when
jpayne@69 172 * PNG_USE_DLL is set.
jpayne@69 173 */
jpayne@69 174
jpayne@69 175 /* System specific discovery.
jpayne@69 176 * ==========================
jpayne@69 177 * This code is used at build time to find PNG_IMPEXP, the API settings
jpayne@69 178 * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
jpayne@69 179 * import processing is possible. On Windows systems it also sets
jpayne@69 180 * compiler-specific macros to the values required to change the calling
jpayne@69 181 * conventions of the various functions.
jpayne@69 182 */
jpayne@69 183 #if defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
jpayne@69 184 defined(__CYGWIN__)
jpayne@69 185 /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
jpayne@69 186 * MinGW on any architecture currently supported by Windows. Also includes
jpayne@69 187 * Watcom builds but these need special treatment because they are not
jpayne@69 188 * compatible with GCC or Visual C because of different calling conventions.
jpayne@69 189 */
jpayne@69 190 # if PNG_API_RULE == 2
jpayne@69 191 /* If this line results in an error, either because __watcall is not
jpayne@69 192 * understood or because of a redefine just below you cannot use *this*
jpayne@69 193 * build of the library with the compiler you are using. *This* build was
jpayne@69 194 * build using Watcom and applications must also be built using Watcom!
jpayne@69 195 */
jpayne@69 196 # define PNGCAPI __watcall
jpayne@69 197 # endif
jpayne@69 198
jpayne@69 199 # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
jpayne@69 200 # define PNGCAPI __cdecl
jpayne@69 201 # if PNG_API_RULE == 1
jpayne@69 202 /* If this line results in an error __stdcall is not understood and
jpayne@69 203 * PNG_API_RULE should not have been set to '1'.
jpayne@69 204 */
jpayne@69 205 # define PNGAPI __stdcall
jpayne@69 206 # endif
jpayne@69 207 # else
jpayne@69 208 /* An older compiler, or one not detected (erroneously) above,
jpayne@69 209 * if necessary override on the command line to get the correct
jpayne@69 210 * variants for the compiler.
jpayne@69 211 */
jpayne@69 212 # ifndef PNGCAPI
jpayne@69 213 # define PNGCAPI _cdecl
jpayne@69 214 # endif
jpayne@69 215 # if PNG_API_RULE == 1 && !defined(PNGAPI)
jpayne@69 216 # define PNGAPI _stdcall
jpayne@69 217 # endif
jpayne@69 218 # endif /* compiler/api */
jpayne@69 219
jpayne@69 220 /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
jpayne@69 221
jpayne@69 222 # if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
jpayne@69 223 # error "PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed"
jpayne@69 224 # endif
jpayne@69 225
jpayne@69 226 # if (defined(_MSC_VER) && _MSC_VER < 800) ||\
jpayne@69 227 (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
jpayne@69 228 /* older Borland and MSC
jpayne@69 229 * compilers used '__export' and required this to be after
jpayne@69 230 * the type.
jpayne@69 231 */
jpayne@69 232 # ifndef PNG_EXPORT_TYPE
jpayne@69 233 # define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
jpayne@69 234 # endif
jpayne@69 235 # define PNG_DLL_EXPORT __export
jpayne@69 236 # else /* newer compiler */
jpayne@69 237 # define PNG_DLL_EXPORT __declspec(dllexport)
jpayne@69 238 # ifndef PNG_DLL_IMPORT
jpayne@69 239 # define PNG_DLL_IMPORT __declspec(dllimport)
jpayne@69 240 # endif
jpayne@69 241 # endif /* compiler */
jpayne@69 242
jpayne@69 243 #else /* !Windows */
jpayne@69 244 # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
jpayne@69 245 # define PNGAPI _System
jpayne@69 246 # else /* !Windows/x86 && !OS/2 */
jpayne@69 247 /* Use the defaults, or define PNG*API on the command line (but
jpayne@69 248 * this will have to be done for every compile!)
jpayne@69 249 */
jpayne@69 250 # endif /* other system, !OS/2 */
jpayne@69 251 #endif /* !Windows/x86 */
jpayne@69 252
jpayne@69 253 /* Now do all the defaulting . */
jpayne@69 254 #ifndef PNGCAPI
jpayne@69 255 # define PNGCAPI
jpayne@69 256 #endif
jpayne@69 257 #ifndef PNGCBAPI
jpayne@69 258 # define PNGCBAPI PNGCAPI
jpayne@69 259 #endif
jpayne@69 260 #ifndef PNGAPI
jpayne@69 261 # define PNGAPI PNGCAPI
jpayne@69 262 #endif
jpayne@69 263
jpayne@69 264 /* PNG_IMPEXP may be set on the compilation system command line or (if not set)
jpayne@69 265 * then in an internal header file when building the library, otherwise (when
jpayne@69 266 * using the library) it is set here.
jpayne@69 267 */
jpayne@69 268 #ifndef PNG_IMPEXP
jpayne@69 269 # if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
jpayne@69 270 /* This forces use of a DLL, disallowing static linking */
jpayne@69 271 # define PNG_IMPEXP PNG_DLL_IMPORT
jpayne@69 272 # endif
jpayne@69 273
jpayne@69 274 # ifndef PNG_IMPEXP
jpayne@69 275 # define PNG_IMPEXP
jpayne@69 276 # endif
jpayne@69 277 #endif
jpayne@69 278
jpayne@69 279 /* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
jpayne@69 280 * 'attributes' as a storage class - the attributes go at the start of the
jpayne@69 281 * function definition, and attributes are always appended regardless of the
jpayne@69 282 * compiler. This considerably simplifies these macros but may cause problems
jpayne@69 283 * if any compilers both need function attributes and fail to handle them as
jpayne@69 284 * a storage class (this is unlikely.)
jpayne@69 285 */
jpayne@69 286 #ifndef PNG_FUNCTION
jpayne@69 287 # define PNG_FUNCTION(type, name, args, attributes) attributes type name args
jpayne@69 288 #endif
jpayne@69 289
jpayne@69 290 #ifndef PNG_EXPORT_TYPE
jpayne@69 291 # define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
jpayne@69 292 #endif
jpayne@69 293
jpayne@69 294 /* The ordinal value is only relevant when preprocessing png.h for symbol
jpayne@69 295 * table entries, so we discard it here. See the .dfn files in the
jpayne@69 296 * scripts directory.
jpayne@69 297 */
jpayne@69 298
jpayne@69 299 #ifndef PNG_EXPORTA
jpayne@69 300 # define PNG_EXPORTA(ordinal, type, name, args, attributes) \
jpayne@69 301 PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \
jpayne@69 302 PNG_LINKAGE_API attributes)
jpayne@69 303 #endif
jpayne@69 304
jpayne@69 305 /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
jpayne@69 306 * so make something non-empty to satisfy the requirement:
jpayne@69 307 */
jpayne@69 308 #define PNG_EMPTY /*empty list*/
jpayne@69 309
jpayne@69 310 #define PNG_EXPORT(ordinal, type, name, args) \
jpayne@69 311 PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
jpayne@69 312
jpayne@69 313 /* Use PNG_REMOVED to comment out a removed interface. */
jpayne@69 314 #ifndef PNG_REMOVED
jpayne@69 315 # define PNG_REMOVED(ordinal, type, name, args, attributes)
jpayne@69 316 #endif
jpayne@69 317
jpayne@69 318 #ifndef PNG_CALLBACK
jpayne@69 319 # define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
jpayne@69 320 #endif
jpayne@69 321
jpayne@69 322 /* Support for compiler specific function attributes. These are used
jpayne@69 323 * so that where compiler support is available incorrect use of API
jpayne@69 324 * functions in png.h will generate compiler warnings.
jpayne@69 325 *
jpayne@69 326 * Added at libpng-1.2.41.
jpayne@69 327 */
jpayne@69 328
jpayne@69 329 #ifndef PNG_NO_PEDANTIC_WARNINGS
jpayne@69 330 # ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
jpayne@69 331 # define PNG_PEDANTIC_WARNINGS_SUPPORTED
jpayne@69 332 # endif
jpayne@69 333 #endif
jpayne@69 334
jpayne@69 335 #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
jpayne@69 336 /* Support for compiler specific function attributes. These are used
jpayne@69 337 * so that where compiler support is available, incorrect use of API
jpayne@69 338 * functions in png.h will generate compiler warnings. Added at libpng
jpayne@69 339 * version 1.2.41. Disabling these removes the warnings but may also produce
jpayne@69 340 * less efficient code.
jpayne@69 341 */
jpayne@69 342 # if defined(__clang__) && defined(__has_attribute)
jpayne@69 343 /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */
jpayne@69 344 # if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__)
jpayne@69 345 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
jpayne@69 346 # endif
jpayne@69 347 # if !defined(PNG_NORETURN) && __has_attribute(__noreturn__)
jpayne@69 348 # define PNG_NORETURN __attribute__((__noreturn__))
jpayne@69 349 # endif
jpayne@69 350 # if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__)
jpayne@69 351 # define PNG_ALLOCATED __attribute__((__malloc__))
jpayne@69 352 # endif
jpayne@69 353 # if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__)
jpayne@69 354 # define PNG_DEPRECATED __attribute__((__deprecated__))
jpayne@69 355 # endif
jpayne@69 356 # if !defined(PNG_PRIVATE)
jpayne@69 357 # ifdef __has_extension
jpayne@69 358 # if __has_extension(attribute_unavailable_with_message)
jpayne@69 359 # define PNG_PRIVATE __attribute__((__unavailable__(\
jpayne@69 360 "This function is not exported by libpng.")))
jpayne@69 361 # endif
jpayne@69 362 # endif
jpayne@69 363 # endif
jpayne@69 364 # ifndef PNG_RESTRICT
jpayne@69 365 # define PNG_RESTRICT __restrict
jpayne@69 366 # endif
jpayne@69 367
jpayne@69 368 # elif defined(__GNUC__)
jpayne@69 369 # ifndef PNG_USE_RESULT
jpayne@69 370 # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
jpayne@69 371 # endif
jpayne@69 372 # ifndef PNG_NORETURN
jpayne@69 373 # define PNG_NORETURN __attribute__((__noreturn__))
jpayne@69 374 # endif
jpayne@69 375 # if __GNUC__ >= 3
jpayne@69 376 # ifndef PNG_ALLOCATED
jpayne@69 377 # define PNG_ALLOCATED __attribute__((__malloc__))
jpayne@69 378 # endif
jpayne@69 379 # ifndef PNG_DEPRECATED
jpayne@69 380 # define PNG_DEPRECATED __attribute__((__deprecated__))
jpayne@69 381 # endif
jpayne@69 382 # ifndef PNG_PRIVATE
jpayne@69 383 # if 0 /* Doesn't work so we use deprecated instead*/
jpayne@69 384 # define PNG_PRIVATE \
jpayne@69 385 __attribute__((warning("This function is not exported by libpng.")))
jpayne@69 386 # else
jpayne@69 387 # define PNG_PRIVATE \
jpayne@69 388 __attribute__((__deprecated__))
jpayne@69 389 # endif
jpayne@69 390 # endif
jpayne@69 391 # if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1))
jpayne@69 392 # ifndef PNG_RESTRICT
jpayne@69 393 # define PNG_RESTRICT __restrict
jpayne@69 394 # endif
jpayne@69 395 # endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */
jpayne@69 396 # endif /* __GNUC__ >= 3 */
jpayne@69 397
jpayne@69 398 # elif defined(_MSC_VER) && (_MSC_VER >= 1300)
jpayne@69 399 # ifndef PNG_USE_RESULT
jpayne@69 400 # define PNG_USE_RESULT /* not supported */
jpayne@69 401 # endif
jpayne@69 402 # ifndef PNG_NORETURN
jpayne@69 403 # define PNG_NORETURN __declspec(noreturn)
jpayne@69 404 # endif
jpayne@69 405 # ifndef PNG_ALLOCATED
jpayne@69 406 # if (_MSC_VER >= 1400)
jpayne@69 407 # define PNG_ALLOCATED __declspec(restrict)
jpayne@69 408 # endif
jpayne@69 409 # endif
jpayne@69 410 # ifndef PNG_DEPRECATED
jpayne@69 411 # define PNG_DEPRECATED __declspec(deprecated)
jpayne@69 412 # endif
jpayne@69 413 # ifndef PNG_PRIVATE
jpayne@69 414 # define PNG_PRIVATE __declspec(deprecated)
jpayne@69 415 # endif
jpayne@69 416 # ifndef PNG_RESTRICT
jpayne@69 417 # if (_MSC_VER >= 1400)
jpayne@69 418 # define PNG_RESTRICT __restrict
jpayne@69 419 # endif
jpayne@69 420 # endif
jpayne@69 421
jpayne@69 422 # elif defined(__WATCOMC__)
jpayne@69 423 # ifndef PNG_RESTRICT
jpayne@69 424 # define PNG_RESTRICT __restrict
jpayne@69 425 # endif
jpayne@69 426 # endif
jpayne@69 427 #endif /* PNG_PEDANTIC_WARNINGS */
jpayne@69 428
jpayne@69 429 #ifndef PNG_DEPRECATED
jpayne@69 430 # define PNG_DEPRECATED /* Use of this function is deprecated */
jpayne@69 431 #endif
jpayne@69 432 #ifndef PNG_USE_RESULT
jpayne@69 433 # define PNG_USE_RESULT /* The result of this function must be checked */
jpayne@69 434 #endif
jpayne@69 435 #ifndef PNG_NORETURN
jpayne@69 436 # define PNG_NORETURN /* This function does not return */
jpayne@69 437 #endif
jpayne@69 438 #ifndef PNG_ALLOCATED
jpayne@69 439 # define PNG_ALLOCATED /* The result of the function is new memory */
jpayne@69 440 #endif
jpayne@69 441 #ifndef PNG_PRIVATE
jpayne@69 442 # define PNG_PRIVATE /* This is a private libpng function */
jpayne@69 443 #endif
jpayne@69 444 #ifndef PNG_RESTRICT
jpayne@69 445 # define PNG_RESTRICT /* The C99 "restrict" feature */
jpayne@69 446 #endif
jpayne@69 447
jpayne@69 448 #ifndef PNG_FP_EXPORT /* A floating point API. */
jpayne@69 449 # ifdef PNG_FLOATING_POINT_SUPPORTED
jpayne@69 450 # define PNG_FP_EXPORT(ordinal, type, name, args)\
jpayne@69 451 PNG_EXPORT(ordinal, type, name, args);
jpayne@69 452 # else /* No floating point APIs */
jpayne@69 453 # define PNG_FP_EXPORT(ordinal, type, name, args)
jpayne@69 454 # endif
jpayne@69 455 #endif
jpayne@69 456 #ifndef PNG_FIXED_EXPORT /* A fixed point API. */
jpayne@69 457 # ifdef PNG_FIXED_POINT_SUPPORTED
jpayne@69 458 # define PNG_FIXED_EXPORT(ordinal, type, name, args)\
jpayne@69 459 PNG_EXPORT(ordinal, type, name, args);
jpayne@69 460 # else /* No fixed point APIs */
jpayne@69 461 # define PNG_FIXED_EXPORT(ordinal, type, name, args)
jpayne@69 462 # endif
jpayne@69 463 #endif
jpayne@69 464
jpayne@69 465 #ifndef PNG_BUILDING_SYMBOL_TABLE
jpayne@69 466 /* Some typedefs to get us started. These should be safe on most of the common
jpayne@69 467 * platforms.
jpayne@69 468 *
jpayne@69 469 * png_uint_32 and png_int_32 may, currently, be larger than required to hold a
jpayne@69 470 * 32-bit value however this is not normally advisable.
jpayne@69 471 *
jpayne@69 472 * png_uint_16 and png_int_16 should always be two bytes in size - this is
jpayne@69 473 * verified at library build time.
jpayne@69 474 *
jpayne@69 475 * png_byte must always be one byte in size.
jpayne@69 476 *
jpayne@69 477 * The checks below use constants from limits.h, as defined by the ISOC90
jpayne@69 478 * standard.
jpayne@69 479 */
jpayne@69 480 #if CHAR_BIT == 8 && UCHAR_MAX == 255
jpayne@69 481 typedef unsigned char png_byte;
jpayne@69 482 #else
jpayne@69 483 # error "libpng requires 8-bit bytes"
jpayne@69 484 #endif
jpayne@69 485
jpayne@69 486 #if INT_MIN == -32768 && INT_MAX == 32767
jpayne@69 487 typedef int png_int_16;
jpayne@69 488 #elif SHRT_MIN == -32768 && SHRT_MAX == 32767
jpayne@69 489 typedef short png_int_16;
jpayne@69 490 #else
jpayne@69 491 # error "libpng requires a signed 16-bit type"
jpayne@69 492 #endif
jpayne@69 493
jpayne@69 494 #if UINT_MAX == 65535
jpayne@69 495 typedef unsigned int png_uint_16;
jpayne@69 496 #elif USHRT_MAX == 65535
jpayne@69 497 typedef unsigned short png_uint_16;
jpayne@69 498 #else
jpayne@69 499 # error "libpng requires an unsigned 16-bit type"
jpayne@69 500 #endif
jpayne@69 501
jpayne@69 502 #if INT_MIN < -2147483646 && INT_MAX > 2147483646
jpayne@69 503 typedef int png_int_32;
jpayne@69 504 #elif LONG_MIN < -2147483646 && LONG_MAX > 2147483646
jpayne@69 505 typedef long int png_int_32;
jpayne@69 506 #else
jpayne@69 507 # error "libpng requires a signed 32-bit (or more) type"
jpayne@69 508 #endif
jpayne@69 509
jpayne@69 510 #if UINT_MAX > 4294967294U
jpayne@69 511 typedef unsigned int png_uint_32;
jpayne@69 512 #elif ULONG_MAX > 4294967294U
jpayne@69 513 typedef unsigned long int png_uint_32;
jpayne@69 514 #else
jpayne@69 515 # error "libpng requires an unsigned 32-bit (or more) type"
jpayne@69 516 #endif
jpayne@69 517
jpayne@69 518 /* Prior to 1.6.0, it was possible to disable the use of size_t and ptrdiff_t.
jpayne@69 519 * From 1.6.0 onwards, an ISO C90 compiler, as well as a standard-compliant
jpayne@69 520 * behavior of sizeof and ptrdiff_t are required.
jpayne@69 521 * The legacy typedefs are provided here for backwards compatibility.
jpayne@69 522 */
jpayne@69 523 typedef size_t png_size_t;
jpayne@69 524 typedef ptrdiff_t png_ptrdiff_t;
jpayne@69 525
jpayne@69 526 /* libpng needs to know the maximum value of 'size_t' and this controls the
jpayne@69 527 * definition of png_alloc_size_t, below. This maximum value of size_t limits
jpayne@69 528 * but does not control the maximum allocations the library makes - there is
jpayne@69 529 * direct application control of this through png_set_user_limits().
jpayne@69 530 */
jpayne@69 531 #ifndef PNG_SMALL_SIZE_T
jpayne@69 532 /* Compiler specific tests for systems where size_t is known to be less than
jpayne@69 533 * 32 bits (some of these systems may no longer work because of the lack of
jpayne@69 534 * 'far' support; see above.)
jpayne@69 535 */
jpayne@69 536 # if (defined(__TURBOC__) && !defined(__FLAT__)) ||\
jpayne@69 537 (defined(_MSC_VER) && defined(MAXSEG_64K))
jpayne@69 538 # define PNG_SMALL_SIZE_T
jpayne@69 539 # endif
jpayne@69 540 #endif
jpayne@69 541
jpayne@69 542 /* png_alloc_size_t is guaranteed to be no smaller than size_t, and no smaller
jpayne@69 543 * than png_uint_32. Casts from size_t or png_uint_32 to png_alloc_size_t are
jpayne@69 544 * not necessary; in fact, it is recommended not to use them at all, so that
jpayne@69 545 * the compiler can complain when something turns out to be problematic.
jpayne@69 546 *
jpayne@69 547 * Casts in the other direction (from png_alloc_size_t to size_t or
jpayne@69 548 * png_uint_32) should be explicitly applied; however, we do not expect to
jpayne@69 549 * encounter practical situations that require such conversions.
jpayne@69 550 *
jpayne@69 551 * PNG_SMALL_SIZE_T must be defined if the maximum value of size_t is less than
jpayne@69 552 * 4294967295 - i.e. less than the maximum value of png_uint_32.
jpayne@69 553 */
jpayne@69 554 #ifdef PNG_SMALL_SIZE_T
jpayne@69 555 typedef png_uint_32 png_alloc_size_t;
jpayne@69 556 #else
jpayne@69 557 typedef size_t png_alloc_size_t;
jpayne@69 558 #endif
jpayne@69 559
jpayne@69 560 /* Prior to 1.6.0 libpng offered limited support for Microsoft C compiler
jpayne@69 561 * implementations of Intel CPU specific support of user-mode segmented address
jpayne@69 562 * spaces, where 16-bit pointers address more than 65536 bytes of memory using
jpayne@69 563 * separate 'segment' registers. The implementation requires two different
jpayne@69 564 * types of pointer (only one of which includes the segment value.)
jpayne@69 565 *
jpayne@69 566 * If required this support is available in version 1.2 of libpng and may be
jpayne@69 567 * available in versions through 1.5, although the correctness of the code has
jpayne@69 568 * not been verified recently.
jpayne@69 569 */
jpayne@69 570
jpayne@69 571 /* Typedef for floating-point numbers that are converted to fixed-point with a
jpayne@69 572 * multiple of 100,000, e.g., gamma
jpayne@69 573 */
jpayne@69 574 typedef png_int_32 png_fixed_point;
jpayne@69 575
jpayne@69 576 /* Add typedefs for pointers */
jpayne@69 577 typedef void * png_voidp;
jpayne@69 578 typedef const void * png_const_voidp;
jpayne@69 579 typedef png_byte * png_bytep;
jpayne@69 580 typedef const png_byte * png_const_bytep;
jpayne@69 581 typedef png_uint_32 * png_uint_32p;
jpayne@69 582 typedef const png_uint_32 * png_const_uint_32p;
jpayne@69 583 typedef png_int_32 * png_int_32p;
jpayne@69 584 typedef const png_int_32 * png_const_int_32p;
jpayne@69 585 typedef png_uint_16 * png_uint_16p;
jpayne@69 586 typedef const png_uint_16 * png_const_uint_16p;
jpayne@69 587 typedef png_int_16 * png_int_16p;
jpayne@69 588 typedef const png_int_16 * png_const_int_16p;
jpayne@69 589 typedef char * png_charp;
jpayne@69 590 typedef const char * png_const_charp;
jpayne@69 591 typedef png_fixed_point * png_fixed_point_p;
jpayne@69 592 typedef const png_fixed_point * png_const_fixed_point_p;
jpayne@69 593 typedef size_t * png_size_tp;
jpayne@69 594 typedef const size_t * png_const_size_tp;
jpayne@69 595
jpayne@69 596 #ifdef PNG_STDIO_SUPPORTED
jpayne@69 597 typedef FILE * png_FILE_p;
jpayne@69 598 #endif
jpayne@69 599
jpayne@69 600 #ifdef PNG_FLOATING_POINT_SUPPORTED
jpayne@69 601 typedef double * png_doublep;
jpayne@69 602 typedef const double * png_const_doublep;
jpayne@69 603 #endif
jpayne@69 604
jpayne@69 605 /* Pointers to pointers; i.e. arrays */
jpayne@69 606 typedef png_byte * * png_bytepp;
jpayne@69 607 typedef png_uint_32 * * png_uint_32pp;
jpayne@69 608 typedef png_int_32 * * png_int_32pp;
jpayne@69 609 typedef png_uint_16 * * png_uint_16pp;
jpayne@69 610 typedef png_int_16 * * png_int_16pp;
jpayne@69 611 typedef const char * * png_const_charpp;
jpayne@69 612 typedef char * * png_charpp;
jpayne@69 613 typedef png_fixed_point * * png_fixed_point_pp;
jpayne@69 614 #ifdef PNG_FLOATING_POINT_SUPPORTED
jpayne@69 615 typedef double * * png_doublepp;
jpayne@69 616 #endif
jpayne@69 617
jpayne@69 618 /* Pointers to pointers to pointers; i.e., pointer to array */
jpayne@69 619 typedef char * * * png_charppp;
jpayne@69 620
jpayne@69 621 #endif /* PNG_BUILDING_SYMBOL_TABLE */
jpayne@69 622
jpayne@69 623 #endif /* PNGCONF_H */