include/SDL_stdinc.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 16 Feb 2011 15:25:10 -0800
changeset 5325 b9c224e16859
parent 5262 b530ef003506
child 5481 22dfc3958dc3
permissions -rw-r--r--
Fixed bug #1090 (SDL_BlitCopyOverlap() assumes memcpy() operates in order)

Even if we're blitting between two different surfaces their pixels might still overlap, because of SDL_CreateRGBSurfaceFrom(), so always use SDL_BlitCopy() and check for overlap in that function.

When handling overlapping surfaces, don't assume that memcpy() iterates forward, instead use memmove() correctly, and provide a fallback implementation of SDL_memmove() that handles the different cases.

Fixed a bug with SDL_memset() not completely filling lengths that aren't a multiple of 4.
Optimized SDL_memcpy() a bit using the same technique as SDL_memset().
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2011 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Lesser General Public
     7     License as published by the Free Software Foundation; either
     8     version 2.1 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Lesser General Public License for more details.
    14 
    15     You should have received a copy of the GNU Lesser General Public
    16     License along with this library; if not, write to the Free Software
    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 /**
    24  *  \file SDL_stdinc.h
    25  *  
    26  *  This is a general header that includes C language support.
    27  */
    28 
    29 #ifndef _SDL_stdinc_h
    30 #define _SDL_stdinc_h
    31 
    32 #include "SDL_config.h"
    33 
    34 
    35 #ifdef HAVE_SYS_TYPES_H
    36 #include <sys/types.h>
    37 #endif
    38 #ifdef HAVE_STDIO_H
    39 #include <stdio.h>
    40 #endif
    41 #if defined(STDC_HEADERS)
    42 # include <stdlib.h>
    43 # include <stddef.h>
    44 # include <stdarg.h>
    45 #else
    46 # if defined(HAVE_STDLIB_H)
    47 #  include <stdlib.h>
    48 # elif defined(HAVE_MALLOC_H)
    49 #  include <malloc.h>
    50 # endif
    51 # if defined(HAVE_STDDEF_H)
    52 #  include <stddef.h>
    53 # endif
    54 # if defined(HAVE_STDARG_H)
    55 #  include <stdarg.h>
    56 # endif
    57 #endif
    58 #ifdef HAVE_STRING_H
    59 # if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
    60 #  include <memory.h>
    61 # endif
    62 # include <string.h>
    63 #endif
    64 #ifdef HAVE_STRINGS_H
    65 # include <strings.h>
    66 #endif
    67 #if defined(HAVE_INTTYPES_H)
    68 # include <inttypes.h>
    69 #elif defined(HAVE_STDINT_H)
    70 # include <stdint.h>
    71 #endif
    72 #ifdef HAVE_CTYPE_H
    73 # include <ctype.h>
    74 #endif
    75 #ifdef HAVE_MATH_H
    76 # include <math.h>
    77 #endif
    78 #if defined(HAVE_ICONV) && defined(HAVE_ICONV_H)
    79 # include <iconv.h>
    80 #endif
    81 
    82 /**
    83  *  The number of elements in an array.
    84  */
    85 #define SDL_arraysize(array)	(sizeof(array)/sizeof(array[0]))
    86 #define SDL_TABLESIZE(table)	SDL_arraysize(table)
    87 
    88 /**
    89  *  \name Cast operators
    90  *  
    91  *  Use proper C++ casts when compiled as C++ to be compatible with the option
    92  *  -Wold-style-cast of GCC (and -Werror=old-style-cast in GCC 4.2 and above).
    93  */
    94 /*@{*/
    95 #ifdef __cplusplus
    96 #define SDL_reinterpret_cast(type, expression) reinterpret_cast<type>(expression)
    97 #define SDL_static_cast(type, expression) static_cast<type>(expression)
    98 #else
    99 #define SDL_reinterpret_cast(type, expression) ((type)(expression))
   100 #define SDL_static_cast(type, expression) ((type)(expression))
   101 #endif
   102 /*@}*//*Cast operators*/
   103 
   104 /* Define a four character code as a Uint32 */
   105 #define SDL_FOURCC(A, B, C, D) \
   106     ((SDL_static_cast(Uint32, SDL_static_cast(Uint8, (A))) << 0) | \
   107      (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (B))) << 8) | \
   108      (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (C))) << 16) | \
   109      (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (D))) << 24))
   110 
   111 /**
   112  *  \name Basic data types
   113  */
   114 /*@{*/
   115 
   116 typedef enum
   117 {
   118     SDL_FALSE = 0,
   119     SDL_TRUE = 1
   120 } SDL_bool;
   121 
   122 /**
   123  * \brief A signed 8-bit integer type.
   124  */
   125 typedef int8_t Sint8;
   126 /**
   127  * \brief An unsigned 8-bit integer type.
   128  */
   129 typedef uint8_t Uint8;
   130 /**
   131  * \brief A signed 16-bit integer type.
   132  */
   133 typedef int16_t Sint16;
   134 /**
   135  * \brief An unsigned 16-bit integer type.
   136  */
   137 typedef uint16_t Uint16;
   138 /**
   139  * \brief A signed 32-bit integer type.
   140  */
   141 typedef int32_t Sint32;
   142 /**
   143  * \brief An unsigned 32-bit integer type.
   144  */
   145 typedef uint32_t Uint32;
   146 
   147 #ifdef SDL_HAS_64BIT_TYPE
   148 /**
   149  * \brief A signed 64-bit integer type.
   150  * \warning On platforms without any sort of 64-bit datatype, this is equivalent to Sint32!
   151  */
   152 typedef int64_t Sint64;
   153 /**
   154  * \brief An unsigned 64-bit integer type.
   155  * \warning On platforms without any sort of 64-bit datatype, this is equivalent to Uint32!
   156  */
   157 typedef uint64_t Uint64;
   158 #else
   159 /* This is really just a hack to prevent the compiler from complaining */
   160 typedef Sint32 Sint64;
   161 typedef Uint32 Uint64;
   162 #endif
   163 
   164 /*@}*//*Basic data types*/
   165 
   166 
   167 #define SDL_COMPILE_TIME_ASSERT(name, x)               \
   168        typedef int SDL_dummy_ ## name[(x) * 2 - 1]
   169 /** \cond */
   170 #ifndef DOXYGEN_SHOULD_IGNORE_THIS
   171 SDL_COMPILE_TIME_ASSERT(uint8, sizeof(Uint8) == 1);
   172 SDL_COMPILE_TIME_ASSERT(sint8, sizeof(Sint8) == 1);
   173 SDL_COMPILE_TIME_ASSERT(uint16, sizeof(Uint16) == 2);
   174 SDL_COMPILE_TIME_ASSERT(sint16, sizeof(Sint16) == 2);
   175 SDL_COMPILE_TIME_ASSERT(uint32, sizeof(Uint32) == 4);
   176 SDL_COMPILE_TIME_ASSERT(sint32, sizeof(Sint32) == 4);
   177 #if !defined(__NINTENDODS__) && !defined(__ANDROID__)
   178 /* TODO: figure out why the following happens:
   179  include/SDL_stdinc.h:150: error: size of array 'SDL_dummy_uint64' is negative
   180  include/SDL_stdinc.h:151: error: size of array 'SDL_dummy_sint64' is negative */
   181 SDL_COMPILE_TIME_ASSERT(uint64, sizeof(Uint64) == 8);
   182 SDL_COMPILE_TIME_ASSERT(sint64, sizeof(Sint64) == 8);
   183 #endif
   184 #endif /* DOXYGEN_SHOULD_IGNORE_THIS */
   185 /** \endcond */
   186 
   187 /* Check to make sure enums are the size of ints, for structure packing.
   188    For both Watcom C/C++ and Borland C/C++ the compiler option that makes
   189    enums having the size of an int must be enabled.
   190    This is "-b" for Borland C/C++ and "-ei" for Watcom C/C++ (v11).
   191 */
   192 /* Enable enums always int in CodeWarrior (for MPW use "-enum int") */
   193 #ifdef __MWERKS__
   194 #pragma enumsalwaysint on
   195 #endif
   196 
   197 /** \cond */
   198 #ifndef DOXYGEN_SHOULD_IGNORE_THIS
   199 #if !defined(__NINTENDODS__) && !defined(__ANDROID__) 
   200    /* TODO: include/SDL_stdinc.h:174: error: size of array 'SDL_dummy_enum' is negative */
   201 typedef enum
   202 {
   203     DUMMY_ENUM_VALUE
   204 } SDL_DUMMY_ENUM;
   205 
   206 SDL_COMPILE_TIME_ASSERT(enum, sizeof(SDL_DUMMY_ENUM) == sizeof(int));
   207 #endif
   208 #endif /* DOXYGEN_SHOULD_IGNORE_THIS */
   209 /** \endcond */
   210 
   211 #include "begin_code.h"
   212 /* Set up for C function definitions, even when using C++ */
   213 #ifdef __cplusplus
   214 /* *INDENT-OFF* */
   215 extern "C" {
   216 /* *INDENT-ON* */
   217 #endif
   218 
   219 #ifdef HAVE_MALLOC
   220 #define SDL_malloc	malloc
   221 #else
   222 extern DECLSPEC void *SDLCALL SDL_malloc(size_t size);
   223 #endif
   224 
   225 #ifdef HAVE_CALLOC
   226 #define SDL_calloc	calloc
   227 #else
   228 extern DECLSPEC void *SDLCALL SDL_calloc(size_t nmemb, size_t size);
   229 #endif
   230 
   231 #ifdef HAVE_REALLOC
   232 #define SDL_realloc	realloc
   233 #else
   234 extern DECLSPEC void *SDLCALL SDL_realloc(void *mem, size_t size);
   235 #endif
   236 
   237 #ifdef HAVE_FREE
   238 #define SDL_free	free
   239 #else
   240 extern DECLSPEC void SDLCALL SDL_free(void *mem);
   241 #endif
   242 
   243 #if defined(HAVE_ALLOCA) && !defined(alloca)
   244 # if defined(HAVE_ALLOCA_H)
   245 #  include <alloca.h>
   246 # elif defined(__GNUC__)
   247 #  define alloca __builtin_alloca
   248 # elif defined(_MSC_VER)
   249 #  include <malloc.h>
   250 #  define alloca _alloca
   251 # elif defined(__WATCOMC__)
   252 #  include <malloc.h>
   253 # elif defined(__BORLANDC__)
   254 #  include <malloc.h>
   255 # elif defined(__DMC__)
   256 #  include <stdlib.h>
   257 # elif defined(__AIX__)
   258 #pragma alloca
   259 # elif defined(__MRC__)
   260 void *alloca(unsigned);
   261 # else
   262 char *alloca();
   263 # endif
   264 #endif
   265 #ifdef HAVE_ALLOCA
   266 #define SDL_stack_alloc(type, count)    (type*)alloca(sizeof(type)*(count))
   267 #define SDL_stack_free(data)
   268 #else
   269 #define SDL_stack_alloc(type, count)    (type*)SDL_malloc(sizeof(type)*(count))
   270 #define SDL_stack_free(data)            SDL_free(data)
   271 #endif
   272 
   273 #ifdef HAVE_GETENV
   274 #define SDL_getenv	getenv
   275 #else
   276 extern DECLSPEC char *SDLCALL SDL_getenv(const char *name);
   277 #endif
   278 
   279 /* SDL_putenv() has moved to SDL_compat. */
   280 #ifdef HAVE_SETENV
   281 #define SDL_setenv	setenv
   282 #else
   283 extern DECLSPEC int SDLCALL SDL_setenv(const char *name, const char *value,
   284                                        int overwrite);
   285 #endif
   286 
   287 #ifdef HAVE_QSORT
   288 #define SDL_qsort	qsort
   289 #else
   290 extern DECLSPEC void SDLCALL SDL_qsort(void *base, size_t nmemb, size_t size,
   291                                        int (*compare) (const void *,
   292                                                        const void *));
   293 #endif
   294 
   295 #ifdef HAVE_ABS
   296 #define SDL_abs		abs
   297 #else
   298 #define SDL_abs(X)	((X) < 0 ? -(X) : (X))
   299 #endif
   300 
   301 #define SDL_min(x, y)	(((x) < (y)) ? (x) : (y))
   302 #define SDL_max(x, y)	(((x) > (y)) ? (x) : (y))
   303 
   304 #ifdef HAVE_CTYPE_H
   305 #define SDL_isdigit(X)  isdigit(X)
   306 #define SDL_isspace(X)  isspace(X)
   307 #define SDL_toupper(X)  toupper(X)
   308 #define SDL_tolower(X)  tolower(X)
   309 #else
   310 #define SDL_isdigit(X)  (((X) >= '0') && ((X) <= '9'))
   311 #define SDL_isspace(X)  (((X) == ' ') || ((X) == '\t') || ((X) == '\r') || ((X) == '\n'))
   312 #define SDL_toupper(X)  (((X) >= 'a') && ((X) <= 'z') ? ('A'+((X)-'a')) : (X))
   313 #define SDL_tolower(X)  (((X) >= 'A') && ((X) <= 'Z') ? ('a'+((X)-'A')) : (X))
   314 #endif
   315 
   316 #ifdef HAVE_MEMSET
   317 #define SDL_memset      memset
   318 #else
   319 extern DECLSPEC void *SDLCALL SDL_memset(void *dst, int c, size_t len);
   320 #endif
   321 #define SDL_zero(x)	SDL_memset(&(x), 0, sizeof((x)))
   322 #define SDL_zerop(x)	SDL_memset((x), 0, sizeof(*(x)))
   323 
   324 #if defined(__GNUC__) && defined(i386)
   325 #define SDL_memset4(dst, val, len)				\
   326 do {								\
   327 	int u0, u1, u2;						\
   328 	__asm__ __volatile__ (					\
   329 		"cld\n\t"					\
   330 		"rep ; stosl\n\t"				\
   331 		: "=&D" (u0), "=&a" (u1), "=&c" (u2)		\
   332 		: "0" (dst), "1" (val), "2" (SDL_static_cast(Uint32, len))	\
   333 		: "memory" );					\
   334 } while(0)
   335 #endif
   336 #ifndef SDL_memset4
   337 #define SDL_memset4(dst, val, len)		\
   338 do {						\
   339 	unsigned _count = (len);		\
   340 	unsigned _n = (_count + 3) / 4;		\
   341 	Uint32 *_p = SDL_static_cast(Uint32 *, dst);		\
   342 	Uint32 _val = (val);			\
   343 	if (len == 0) break;			\
   344         switch (_count % 4) {			\
   345         case 0: do {    *_p++ = _val;		\
   346         case 3:         *_p++ = _val;		\
   347         case 2:         *_p++ = _val;		\
   348         case 1:         *_p++ = _val;		\
   349 		} while ( --_n );		\
   350 	}					\
   351 } while(0)
   352 #endif
   353 
   354 /* We can count on memcpy existing on Mac OS X and being well-tuned. */
   355 #if defined(__MACOSX__)
   356 #define SDL_memcpy      memcpy
   357 #elif defined(__GNUC__) && defined(i386)
   358 #define SDL_memcpy(dst, src, len)					  \
   359 do {									  \
   360 	int u0, u1, u2;						  	  \
   361 	__asm__ __volatile__ (						  \
   362 		"cld\n\t"						  \
   363 		"rep ; movsl\n\t"					  \
   364 		"testb $2,%b4\n\t"					  \
   365 		"je 1f\n\t"						  \
   366 		"movsw\n"						  \
   367 		"1:\ttestb $1,%b4\n\t"					  \
   368 		"je 2f\n\t"						  \
   369 		"movsb\n"						  \
   370 		"2:"							  \
   371 		: "=&c" (u0), "=&D" (u1), "=&S" (u2)			  \
   372 		: "0" (SDL_static_cast(unsigned, len)/4), "q" (len), "1" (dst),"2" (src) \
   373 		: "memory" );						  \
   374 } while(0)
   375 #endif
   376 #ifndef SDL_memcpy
   377 #ifdef HAVE_MEMCPY
   378 #define SDL_memcpy      memcpy
   379 #elif defined(HAVE_BCOPY)
   380 #define SDL_memcpy(d, s, n)	bcopy((s), (d), (n))
   381 #else
   382 extern DECLSPEC void *SDLCALL SDL_memcpy(void *dst, const void *src,
   383                                          size_t len);
   384 #endif
   385 #endif
   386 
   387 /* We can count on memcpy existing on Mac OS X and being well-tuned. */
   388 #if defined(__MACOSX__)
   389 #define SDL_memcpy4(dst, src, len)	SDL_memcpy((dst), (src), (len) << 2)
   390 #elif defined(__GNUC__) && defined(i386)
   391 #define SDL_memcpy4(dst, src, len)				\
   392 do {								\
   393 	int ecx, edi, esi;					\
   394 	__asm__ __volatile__ (					\
   395 		"cld\n\t"					\
   396 		"rep ; movsl"					\
   397 		: "=&c" (ecx), "=&D" (edi), "=&S" (esi)		\
   398 		: "0" (SDL_static_cast(unsigned, len)), "1" (dst), "2" (src)	\
   399 		: "memory" );					\
   400 } while(0)
   401 #endif
   402 #ifndef SDL_memcpy4
   403 #define SDL_memcpy4(dst, src, len)	SDL_memcpy((dst), (src), (len) << 2)
   404 #endif
   405 
   406 #ifdef HAVE_MEMMOVE
   407 #define SDL_memmove     memmove
   408 #else
   409 extern DECLSPEC void *SDLCALL SDL_memmove(void *dst, const void *src,
   410                                           size_t len);
   411 #endif
   412 
   413 #ifdef HAVE_MEMCMP
   414 #define SDL_memcmp      memcmp
   415 #else
   416 extern DECLSPEC int SDLCALL SDL_memcmp(const void *s1, const void *s2,
   417                                        size_t len);
   418 #endif
   419 
   420 #ifdef HAVE_STRLEN
   421 #define SDL_strlen      strlen
   422 #else
   423 extern DECLSPEC size_t SDLCALL SDL_strlen(const char *string);
   424 #endif
   425 
   426 #ifdef HAVE_WCSLEN
   427 #define SDL_wcslen      wcslen
   428 #else
   429 #if !defined(wchar_t) && defined(__NINTENDODS__)
   430 #define wchar_t short           /* TODO: figure out why libnds doesn't have this */
   431 #endif
   432 extern DECLSPEC size_t SDLCALL SDL_wcslen(const wchar_t * string);
   433 #endif
   434 
   435 #ifdef HAVE_WCSLCPY
   436 #define SDL_wcslcpy      wcslcpy
   437 #else
   438 extern DECLSPEC size_t SDLCALL SDL_wcslcpy(wchar_t *dst, const wchar_t *src, size_t maxlen);
   439 #endif
   440 
   441 #ifdef HAVE_WCSLCAT
   442 #define SDL_wcslcat      wcslcat
   443 #else
   444 extern DECLSPEC size_t SDLCALL SDL_wcslcat(wchar_t *dst, const wchar_t *src, size_t maxlen);
   445 #endif
   446 
   447 
   448 #ifdef HAVE_STRLCPY
   449 #define SDL_strlcpy     strlcpy
   450 #else
   451 extern DECLSPEC size_t SDLCALL SDL_strlcpy(char *dst, const char *src,
   452                                            size_t maxlen);
   453 #endif
   454 
   455 extern DECLSPEC size_t SDLCALL SDL_utf8strlcpy(char *dst, const char *src,
   456                                             size_t dst_bytes);
   457 
   458 #ifdef HAVE_STRLCAT
   459 #define SDL_strlcat    strlcat
   460 #else
   461 extern DECLSPEC size_t SDLCALL SDL_strlcat(char *dst, const char *src,
   462                                            size_t maxlen);
   463 #endif
   464 
   465 #ifdef HAVE_STRDUP
   466 #define SDL_strdup     strdup
   467 #else
   468 extern DECLSPEC char *SDLCALL SDL_strdup(const char *string);
   469 #endif
   470 
   471 #ifdef HAVE__STRREV
   472 #define SDL_strrev      _strrev
   473 #else
   474 extern DECLSPEC char *SDLCALL SDL_strrev(char *string);
   475 #endif
   476 
   477 #ifdef HAVE__STRUPR
   478 #define SDL_strupr      _strupr
   479 #else
   480 extern DECLSPEC char *SDLCALL SDL_strupr(char *string);
   481 #endif
   482 
   483 #ifdef HAVE__STRLWR
   484 #define SDL_strlwr      _strlwr
   485 #else
   486 extern DECLSPEC char *SDLCALL SDL_strlwr(char *string);
   487 #endif
   488 
   489 #ifdef HAVE_STRCHR
   490 #define SDL_strchr      strchr
   491 #elif defined(HAVE_INDEX)
   492 #define SDL_strchr      index
   493 #else
   494 extern DECLSPEC char *SDLCALL SDL_strchr(const char *string, int c);
   495 #endif
   496 
   497 #ifdef HAVE_STRRCHR
   498 #define SDL_strrchr     strrchr
   499 #elif defined(HAVE_RINDEX)
   500 #define SDL_strrchr     rindex
   501 #else
   502 extern DECLSPEC char *SDLCALL SDL_strrchr(const char *string, int c);
   503 #endif
   504 
   505 #ifdef HAVE_STRSTR
   506 #define SDL_strstr      strstr
   507 #else
   508 extern DECLSPEC char *SDLCALL SDL_strstr(const char *haystack,
   509                                          const char *needle);
   510 #endif
   511 
   512 #ifdef HAVE_ITOA
   513 #define SDL_itoa        itoa
   514 #else
   515 #define SDL_itoa(value, string, radix)	SDL_ltoa((long)value, string, radix)
   516 #endif
   517 
   518 #ifdef HAVE__LTOA
   519 #define SDL_ltoa        _ltoa
   520 #else
   521 extern DECLSPEC char *SDLCALL SDL_ltoa(long value, char *string, int radix);
   522 #endif
   523 
   524 #ifdef HAVE__UITOA
   525 #define SDL_uitoa       _uitoa
   526 #else
   527 #define SDL_uitoa(value, string, radix)	SDL_ultoa((long)value, string, radix)
   528 #endif
   529 
   530 #ifdef HAVE__ULTOA
   531 #define SDL_ultoa       _ultoa
   532 #else
   533 extern DECLSPEC char *SDLCALL SDL_ultoa(unsigned long value, char *string,
   534                                         int radix);
   535 #endif
   536 
   537 #ifdef HAVE_STRTOL
   538 #define SDL_strtol      strtol
   539 #else
   540 extern DECLSPEC long SDLCALL SDL_strtol(const char *string, char **endp,
   541                                         int base);
   542 #endif
   543 
   544 #ifdef HAVE_STRTOUL
   545 #define SDL_strtoul      strtoul
   546 #else
   547 extern DECLSPEC unsigned long SDLCALL SDL_strtoul(const char *string,
   548                                                   char **endp, int base);
   549 #endif
   550 
   551 #ifdef SDL_HAS_64BIT_TYPE
   552 
   553 #ifdef HAVE__I64TOA
   554 #define SDL_lltoa       _i64toa
   555 #else
   556 extern DECLSPEC char *SDLCALL SDL_lltoa(Sint64 value, char *string,
   557                                         int radix);
   558 #endif
   559 
   560 #ifdef HAVE__UI64TOA
   561 #define SDL_ulltoa      _ui64toa
   562 #else
   563 extern DECLSPEC char *SDLCALL SDL_ulltoa(Uint64 value, char *string,
   564                                          int radix);
   565 #endif
   566 
   567 #ifdef HAVE_STRTOLL
   568 #define SDL_strtoll     strtoll
   569 #else
   570 extern DECLSPEC Sint64 SDLCALL SDL_strtoll(const char *string, char **endp,
   571                                            int base);
   572 #endif
   573 
   574 #ifdef HAVE_STRTOULL
   575 #define SDL_strtoull     strtoull
   576 #else
   577 extern DECLSPEC Uint64 SDLCALL SDL_strtoull(const char *string, char **endp,
   578                                             int base);
   579 #endif
   580 
   581 #endif /* SDL_HAS_64BIT_TYPE */
   582 
   583 #ifdef HAVE_STRTOD
   584 #define SDL_strtod      strtod
   585 #else
   586 extern DECLSPEC double SDLCALL SDL_strtod(const char *string, char **endp);
   587 #endif
   588 
   589 #ifdef HAVE_ATOI
   590 #define SDL_atoi        atoi
   591 #else
   592 #define SDL_atoi(X)     SDL_strtol(X, NULL, 0)
   593 #endif
   594 
   595 #ifdef HAVE_ATOF
   596 #define SDL_atof        atof
   597 #else
   598 #define SDL_atof(X)     SDL_strtod(X, NULL)
   599 #endif
   600 
   601 #ifdef HAVE_STRCMP
   602 #define SDL_strcmp      strcmp
   603 #else
   604 extern DECLSPEC int SDLCALL SDL_strcmp(const char *str1, const char *str2);
   605 #endif
   606 
   607 #ifdef HAVE_STRNCMP
   608 #define SDL_strncmp     strncmp
   609 #else
   610 extern DECLSPEC int SDLCALL SDL_strncmp(const char *str1, const char *str2,
   611                                         size_t maxlen);
   612 #endif
   613 
   614 #ifdef HAVE_STRCASECMP
   615 #define SDL_strcasecmp  strcasecmp
   616 #elif defined(HAVE__STRICMP)
   617 #define SDL_strcasecmp  _stricmp
   618 #else
   619 extern DECLSPEC int SDLCALL SDL_strcasecmp(const char *str1,
   620                                            const char *str2);
   621 #endif
   622 
   623 #ifdef HAVE_STRNCASECMP
   624 #define SDL_strncasecmp strncasecmp
   625 #elif defined(HAVE__STRNICMP)
   626 #define SDL_strncasecmp _strnicmp
   627 #else
   628 extern DECLSPEC int SDLCALL SDL_strncasecmp(const char *str1,
   629                                             const char *str2, size_t maxlen);
   630 #endif
   631 
   632 #ifdef HAVE_SSCANF
   633 #define SDL_sscanf      sscanf
   634 #else
   635 extern DECLSPEC int SDLCALL SDL_sscanf(const char *text, const char *fmt,
   636                                        ...);
   637 #endif
   638 
   639 #ifdef HAVE_SNPRINTF
   640 #define SDL_snprintf    snprintf
   641 #else
   642 extern DECLSPEC int SDLCALL SDL_snprintf(char *text, size_t maxlen,
   643                                          const char *fmt, ...);
   644 #endif
   645 
   646 #ifdef HAVE_VSNPRINTF
   647 #define SDL_vsnprintf   vsnprintf
   648 #else
   649 extern DECLSPEC int SDLCALL SDL_vsnprintf(char *text, size_t maxlen,
   650                                           const char *fmt, va_list ap);
   651 #endif
   652 
   653 #ifndef HAVE_M_PI
   654 #define M_PI    3.14159265358979323846264338327950288   /* pi */
   655 #endif
   656 
   657 #ifdef HAVE_ATAN
   658 #define SDL_atan        atan
   659 #else
   660 extern DECLSPEC double SDLCALL SDL_atan(double x);
   661 #endif
   662 
   663 #ifdef HAVE_ATAN2
   664 #define SDL_atan2       atan2
   665 #else
   666 extern DECLSPEC double SDLCALL SDL_atan2(double y, double x);
   667 #endif
   668 
   669 #ifdef HAVE_CEIL
   670 #define SDL_ceil        ceil
   671 #else
   672 #define SDL_ceil(x)     ((double)(int)((x)+0.5))
   673 #endif
   674 
   675 #ifdef HAVE_COPYSIGN
   676 #define SDL_copysign    copysign
   677 #else
   678 extern DECLSPEC double SDLCALL SDL_copysign(double x, double y);
   679 #endif
   680 
   681 #ifdef HAVE_COS
   682 #define SDL_cos         cos
   683 #else
   684 extern DECLSPEC double SDLCALL SDL_cos(double x);
   685 #endif
   686 
   687 #ifdef HAVE_COSF
   688 #define SDL_cosf        cosf
   689 #else
   690 #define SDL_cosf(x) (float)SDL_cos((double)x)
   691 #endif
   692 
   693 #ifdef HAVE_FABS
   694 #define SDL_fabs        fabs
   695 #else
   696 extern DECLSPEC double SDLCALL SDL_fabs(double x);
   697 #endif
   698 
   699 #ifdef HAVE_FLOOR
   700 #define SDL_floor       floor
   701 #else
   702 extern DECLSPEC double SDLCALL SDL_floor(double x);
   703 #endif
   704 
   705 #ifdef HAVE_LOG
   706 #define SDL_log         log
   707 #else
   708 extern DECLSPEC double SDLCALL SDL_log(double x);
   709 #endif
   710 
   711 #ifdef HAVE_POW
   712 #define SDL_pow         pow
   713 #else
   714 extern DECLSPEC double SDLCALL SDL_pow(double x, double y);
   715 #endif
   716 
   717 #ifdef HAVE_SCALBN
   718 #define SDL_scalbn      scalbn
   719 #else
   720 extern DECLSPEC double SDLCALL SDL_scalbn(double x, int n);
   721 #endif
   722 
   723 #ifdef HAVE_SIN
   724 #define SDL_sin         sin
   725 #else
   726 extern DECLSPEC double SDLCALL SDL_sin(double x);
   727 #endif
   728 
   729 #ifdef HAVE_SINF
   730 #define SDL_sinf        sinf
   731 #else
   732 #define SDL_sinf(x) (float)SDL_sin((double)x)
   733 #endif
   734 
   735 #ifdef HAVE_SQRT
   736 #define SDL_sqrt        sqrt
   737 #else
   738 extern DECLSPEC double SDLCALL SDL_sqrt(double x);
   739 #endif
   740 
   741 /* The SDL implementation of iconv() returns these error codes */
   742 #define SDL_ICONV_ERROR		(size_t)-1
   743 #define SDL_ICONV_E2BIG		(size_t)-2
   744 #define SDL_ICONV_EILSEQ	(size_t)-3
   745 #define SDL_ICONV_EINVAL	(size_t)-4
   746 
   747 #if defined(HAVE_ICONV) && defined(HAVE_ICONV_H)
   748 #define SDL_iconv_t     iconv_t
   749 #define SDL_iconv_open  iconv_open
   750 #define SDL_iconv_close iconv_close
   751 #else
   752 typedef struct _SDL_iconv_t *SDL_iconv_t;
   753 extern DECLSPEC SDL_iconv_t SDLCALL SDL_iconv_open(const char *tocode,
   754                                                    const char *fromcode);
   755 extern DECLSPEC int SDLCALL SDL_iconv_close(SDL_iconv_t cd);
   756 #endif
   757 extern DECLSPEC size_t SDLCALL SDL_iconv(SDL_iconv_t cd, const char **inbuf,
   758                                          size_t * inbytesleft, char **outbuf,
   759                                          size_t * outbytesleft);
   760 /**
   761  *  This function converts a string between encodings in one pass, returning a
   762  *  string that must be freed with SDL_free() or NULL on error.
   763  */
   764 extern DECLSPEC char *SDLCALL SDL_iconv_string(const char *tocode,
   765                                                const char *fromcode,
   766                                                const char *inbuf,
   767                                                size_t inbytesleft);
   768 #define SDL_iconv_utf8_locale(S)	SDL_iconv_string("", "UTF-8", S, SDL_strlen(S)+1)
   769 #define SDL_iconv_utf8_ucs2(S)		(Uint16 *)SDL_iconv_string("UCS-2", "UTF-8", S, SDL_strlen(S)+1)
   770 #define SDL_iconv_utf8_ucs4(S)		(Uint32 *)SDL_iconv_string("UCS-4", "UTF-8", S, SDL_strlen(S)+1)
   771 
   772 /* Ends C function definitions when using C++ */
   773 #ifdef __cplusplus
   774 /* *INDENT-OFF* */
   775 }
   776 /* *INDENT-ON* */
   777 #endif
   778 #include "close_code.h"
   779 
   780 #endif /* _SDL_stdinc_h */
   781 
   782 /* vi: set ts=4 sw=4 expandtab: */