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      1 /*
      2     SDL - Simple DirectMedia Layer
      3     Copyright (C) 1997-2012 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 (at) libsdl.org
     21 */
     22 
     23 /** @file SDL_stdinc.h
     24  *  This is a general header that includes C language support
     25  */
     26 
     27 #ifndef _SDL_stdinc_h
     28 #define _SDL_stdinc_h
     29 
     30 #include "SDL_config.h"
     31 
     32 
     33 #ifdef HAVE_SYS_TYPES_H
     34 #include <sys/types.h>
     35 #endif
     36 #ifdef HAVE_STDIO_H
     37 #include <stdio.h>
     38 #endif
     39 #if defined(STDC_HEADERS)
     40 # include <stdlib.h>
     41 # include <stddef.h>
     42 # include <stdarg.h>
     43 #else
     44 # if defined(HAVE_STDLIB_H)
     45 #  include <stdlib.h>
     46 # elif defined(HAVE_MALLOC_H)
     47 #  include <malloc.h>
     48 # endif
     49 # if defined(HAVE_STDDEF_H)
     50 #  include <stddef.h>
     51 # endif
     52 # if defined(HAVE_STDARG_H)
     53 #  include <stdarg.h>
     54 # endif
     55 #endif
     56 #ifdef HAVE_STRING_H
     57 # if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
     58 #  include <memory.h>
     59 # endif
     60 # include <string.h>
     61 #endif
     62 #ifdef HAVE_STRINGS_H
     63 # include <strings.h>
     64 #endif
     65 #if defined(HAVE_INTTYPES_H)
     66 # include <inttypes.h>
     67 #elif defined(HAVE_STDINT_H)
     68 # include <stdint.h>
     69 #endif
     70 #ifdef HAVE_CTYPE_H
     71 # include <ctype.h>
     72 #endif
     73 #if defined(HAVE_ICONV) && defined(HAVE_ICONV_H)
     74 # include <iconv.h>
     75 #endif
     76 
     77 /** The number of elements in an array */
     78 #define SDL_arraysize(array)	(sizeof(array)/sizeof(array[0]))
     79 #define SDL_TABLESIZE(table)	SDL_arraysize(table)
     80 
     81 /* Use proper C++ casts when compiled as C++ to be compatible with the option
     82  -Wold-style-cast of GCC (and -Werror=old-style-cast in GCC 4.2 and above. */
     83 #ifdef __cplusplus
     84 #define SDL_reinterpret_cast(type, expression) reinterpret_cast<type>(expression)
     85 #define SDL_static_cast(type, expression) static_cast<type>(expression)
     86 #else
     87 #define SDL_reinterpret_cast(type, expression) ((type)(expression))
     88 #define SDL_static_cast(type, expression) ((type)(expression))
     89 #endif
     90 
     91 /** @name Basic data types */
     92 /*@{*/
     93 typedef enum {
     94 	SDL_FALSE = 0,
     95 	SDL_TRUE  = 1
     96 } SDL_bool;
     97 
     98 typedef int8_t		Sint8;
     99 typedef uint8_t		Uint8;
    100 typedef int16_t		Sint16;
    101 typedef uint16_t	Uint16;
    102 typedef int32_t		Sint32;
    103 typedef uint32_t	Uint32;
    104 
    105 #ifdef SDL_HAS_64BIT_TYPE
    106 typedef int64_t		Sint64;
    107 #ifndef SYMBIAN32_GCCE
    108 typedef uint64_t	Uint64;
    109 #endif
    110 #else
    111 /* This is really just a hack to prevent the compiler from complaining */
    112 typedef struct {
    113 	Uint32 hi;
    114 	Uint32 lo;
    115 } Uint64, Sint64;
    116 #endif
    117 
    118 /*@}*/
    119 
    120 /** @name Make sure the types really have the right sizes */
    121 /*@{*/
    122 #define SDL_COMPILE_TIME_ASSERT(name, x)               \
    123        typedef int SDL_dummy_ ## name[(x) * 2 - 1]
    124 
    125 SDL_COMPILE_TIME_ASSERT(uint8, sizeof(Uint8) == 1);
    126 SDL_COMPILE_TIME_ASSERT(sint8, sizeof(Sint8) == 1);
    127 SDL_COMPILE_TIME_ASSERT(uint16, sizeof(Uint16) == 2);
    128 SDL_COMPILE_TIME_ASSERT(sint16, sizeof(Sint16) == 2);
    129 SDL_COMPILE_TIME_ASSERT(uint32, sizeof(Uint32) == 4);
    130 SDL_COMPILE_TIME_ASSERT(sint32, sizeof(Sint32) == 4);
    131 SDL_COMPILE_TIME_ASSERT(uint64, sizeof(Uint64) == 8);
    132 SDL_COMPILE_TIME_ASSERT(sint64, sizeof(Sint64) == 8);
    133 /*@}*/
    134 
    135 /** @name Enum Size Check
    136  *  Check to make sure enums are the size of ints, for structure packing.
    137  *  For both Watcom C/C++ and Borland C/C++ the compiler option that makes
    138  *  enums having the size of an int must be enabled.
    139  *  This is "-b" for Borland C/C++ and "-ei" for Watcom C/C++ (v11).
    140  */
    141 /* Enable enums always int in CodeWarrior (for MPW use "-enum int") */
    142 #ifdef __MWERKS__
    143 #pragma enumsalwaysint on
    144 #endif
    145 
    146 typedef enum {
    147 	DUMMY_ENUM_VALUE
    148 } SDL_DUMMY_ENUM;
    149 
    150 #ifndef __NDS__
    151 SDL_COMPILE_TIME_ASSERT(enum, sizeof(SDL_DUMMY_ENUM) == sizeof(int));
    152 #endif
    153 /*@}*/
    154 
    155 #include "begin_code.h"
    156 /* Set up for C function definitions, even when using C++ */
    157 #ifdef __cplusplus
    158 extern "C" {
    159 #endif
    160 
    161 #ifdef HAVE_MALLOC
    162 #define SDL_malloc	malloc
    163 #else
    164 extern DECLSPEC void * SDLCALL SDL_malloc(size_t size);
    165 #endif
    166 
    167 #ifdef HAVE_CALLOC
    168 #define SDL_calloc	calloc
    169 #else
    170 extern DECLSPEC void * SDLCALL SDL_calloc(size_t nmemb, size_t size);
    171 #endif
    172 
    173 #ifdef HAVE_REALLOC
    174 #define SDL_realloc	realloc
    175 #else
    176 extern DECLSPEC void * SDLCALL SDL_realloc(void *mem, size_t size);
    177 #endif
    178 
    179 #ifdef HAVE_FREE
    180 #define SDL_free	free
    181 #else
    182 extern DECLSPEC void SDLCALL SDL_free(void *mem);
    183 #endif
    184 
    185 #if defined(HAVE_ALLOCA) && !defined(alloca)
    186 # if defined(HAVE_ALLOCA_H)
    187 #  include <alloca.h>
    188 # elif defined(__GNUC__)
    189 #  define alloca __builtin_alloca
    190 # elif defined(_MSC_VER)
    191 #  include <malloc.h>
    192 #  define alloca _alloca
    193 # elif defined(__WATCOMC__)
    194 #  include <malloc.h>
    195 # elif defined(__BORLANDC__)
    196 #  include <malloc.h>
    197 # elif defined(__DMC__)
    198 #  include <stdlib.h>
    199 # elif defined(__AIX__)
    200   #pragma alloca
    201 # elif defined(__MRC__)
    202    void *alloca (unsigned);
    203 # else
    204    char *alloca ();
    205 # endif
    206 #endif
    207 #ifdef HAVE_ALLOCA
    208 #define SDL_stack_alloc(type, count)    (type*)alloca(sizeof(type)*(count))
    209 #define SDL_stack_free(data)
    210 #else
    211 #define SDL_stack_alloc(type, count)    (type*)SDL_malloc(sizeof(type)*(count))
    212 #define SDL_stack_free(data)            SDL_free(data)
    213 #endif
    214 
    215 #ifdef HAVE_GETENV
    216 #define SDL_getenv	getenv
    217 #else
    218 extern DECLSPEC char * SDLCALL SDL_getenv(const char *name);
    219 #endif
    220 
    221 #ifdef HAVE_PUTENV
    222 #define SDL_putenv	putenv
    223 #else
    224 extern DECLSPEC int SDLCALL SDL_putenv(const char *variable);
    225 #endif
    226 
    227 #ifdef HAVE_QSORT
    228 #define SDL_qsort	qsort
    229 #else
    230 extern DECLSPEC void SDLCALL SDL_qsort(void *base, size_t nmemb, size_t size,
    231            int (*compare)(const void *, const void *));
    232 #endif
    233 
    234 #ifdef HAVE_ABS
    235 #define SDL_abs		abs
    236 #else
    237 #define SDL_abs(X)	((X) < 0 ? -(X) : (X))
    238 #endif
    239 
    240 #define SDL_min(x, y)	(((x) < (y)) ? (x) : (y))
    241 #define SDL_max(x, y)	(((x) > (y)) ? (x) : (y))
    242 
    243 #ifdef HAVE_CTYPE_H
    244 #define SDL_isdigit(X)  isdigit(X)
    245 #define SDL_isspace(X)  isspace(X)
    246 #define SDL_toupper(X)  toupper(X)
    247 #define SDL_tolower(X)  tolower(X)
    248 #else
    249 #define SDL_isdigit(X)  (((X) >= '0') && ((X) <= '9'))
    250 #define SDL_isspace(X)  (((X) == ' ') || ((X) == '\t') || ((X) == '\r') || ((X) == '\n'))
    251 #define SDL_toupper(X)  (((X) >= 'a') && ((X) <= 'z') ? ('A'+((X)-'a')) : (X))
    252 #define SDL_tolower(X)  (((X) >= 'A') && ((X) <= 'Z') ? ('a'+((X)-'A')) : (X))
    253 #endif
    254 
    255 #ifdef HAVE_MEMSET
    256 #define SDL_memset      memset
    257 #else
    258 extern DECLSPEC void * SDLCALL SDL_memset(void *dst, int c, size_t len);
    259 #endif
    260 
    261 #if defined(__GNUC__) && defined(i386)
    262 #define SDL_memset4(dst, val, len)				\
    263 do {								\
    264 	int u0, u1, u2;						\
    265 	__asm__ __volatile__ (					\
    266 		"cld\n\t"					\
    267 		"rep ; stosl\n\t"				\
    268 		: "=&D" (u0), "=&a" (u1), "=&c" (u2)		\
    269 		: "0" (dst), "1" (val), "2" (SDL_static_cast(Uint32, len))	\
    270 		: "memory" );					\
    271 } while(0)
    272 #endif
    273 #ifndef SDL_memset4
    274 #define SDL_memset4(dst, val, len)		\
    275 do {						\
    276 	unsigned _count = (len);		\
    277 	unsigned _n = (_count + 3) / 4;		\
    278 	Uint32 *_p = SDL_static_cast(Uint32 *, dst);	\
    279 	Uint32 _val = (val);			\
    280 	if (len == 0) break;			\
    281         switch (_count % 4) {			\
    282         case 0: do {    *_p++ = _val;		\
    283         case 3:         *_p++ = _val;		\
    284         case 2:         *_p++ = _val;		\
    285         case 1:         *_p++ = _val;		\
    286 		} while ( --_n );		\
    287 	}					\
    288 } while(0)
    289 #endif
    290 
    291 /* We can count on memcpy existing on Mac OS X and being well-tuned. */
    292 #if defined(__MACH__) && defined(__APPLE__)
    293 #define SDL_memcpy(dst, src, len) memcpy(dst, src, len)
    294 #elif defined(__GNUC__) && defined(i386)
    295 #define SDL_memcpy(dst, src, len)					  \
    296 do {									  \
    297 	int u0, u1, u2;						  	  \
    298 	__asm__ __volatile__ (						  \
    299 		"cld\n\t"						  \
    300 		"rep ; movsl\n\t"					  \
    301 		"testb $2,%b4\n\t"					  \
    302 		"je 1f\n\t"						  \
    303 		"movsw\n"						  \
    304 		"1:\ttestb $1,%b4\n\t"					  \
    305 		"je 2f\n\t"						  \
    306 		"movsb\n"						  \
    307 		"2:"							  \
    308 		: "=&c" (u0), "=&D" (u1), "=&S" (u2)			  \
    309 		: "0" (SDL_static_cast(unsigned, len)/4), "q" (len), "1" (dst),"2" (src) \
    310 		: "memory" );						  \
    311 } while(0)
    312 #endif
    313 #ifndef SDL_memcpy
    314 #ifdef HAVE_MEMCPY
    315 #define SDL_memcpy      memcpy
    316 #elif defined(HAVE_BCOPY)
    317 #define SDL_memcpy(d, s, n)	bcopy((s), (d), (n))
    318 #else
    319 extern DECLSPEC void * SDLCALL SDL_memcpy(void *dst, const void *src, size_t len);
    320 #endif
    321 #endif
    322 
    323 /* We can count on memcpy existing on Mac OS X and being well-tuned. */
    324 #if defined(__MACH__) && defined(__APPLE__)
    325 #define SDL_memcpy4(dst, src, len) memcpy(dst, src, (len)*4)
    326 #elif defined(__GNUC__) && defined(i386)
    327 #define SDL_memcpy4(dst, src, len)				\
    328 do {								\
    329 	int ecx, edi, esi;					\
    330 	__asm__ __volatile__ (					\
    331 		"cld\n\t"					\
    332 		"rep ; movsl"					\
    333 		: "=&c" (ecx), "=&D" (edi), "=&S" (esi)		\
    334 		: "0" (SDL_static_cast(unsigned, len)), "1" (dst), "2" (src)	\
    335 		: "memory" );					\
    336 } while(0)
    337 #endif
    338 #ifndef SDL_memcpy4
    339 #define SDL_memcpy4(dst, src, len)	SDL_memcpy(dst, src, (len) << 2)
    340 #endif
    341 
    342 #if defined(__GNUC__) && defined(i386)
    343 #define SDL_revcpy(dst, src, len)			\
    344 do {							\
    345 	int u0, u1, u2;					\
    346 	char *dstp = SDL_static_cast(char *, dst);	\
    347 	char *srcp = SDL_static_cast(char *, src);	\
    348 	int n = (len);					\
    349 	if ( n >= 4 ) {					\
    350 	__asm__ __volatile__ (				\
    351 		"std\n\t"				\
    352 		"rep ; movsl\n\t"			\
    353 		"cld\n\t"				\
    354 		: "=&c" (u0), "=&D" (u1), "=&S" (u2)	\
    355 		: "0" (n >> 2),				\
    356 		  "1" (dstp+(n-4)), "2" (srcp+(n-4))	\
    357 		: "memory" );				\
    358 	}						\
    359 	switch (n & 3) {				\
    360 		case 3: dstp[2] = srcp[2];		\
    361 		case 2: dstp[1] = srcp[1];		\
    362 		case 1: dstp[0] = srcp[0];		\
    363 			break;				\
    364 		default:				\
    365 			break;				\
    366 	}						\
    367 } while(0)
    368 #endif
    369 #ifndef SDL_revcpy
    370 extern DECLSPEC void * SDLCALL SDL_revcpy(void *dst, const void *src, size_t len);
    371 #endif
    372 
    373 #ifdef HAVE_MEMMOVE
    374 #define SDL_memmove     memmove
    375 #elif defined(HAVE_BCOPY)
    376 #define SDL_memmove(d, s, n)	bcopy((s), (d), (n))
    377 #else
    378 #define SDL_memmove(dst, src, len)			\
    379 do {							\
    380 	if ( dst < src ) {				\
    381 		SDL_memcpy(dst, src, len);		\
    382 	} else {					\
    383 		SDL_revcpy(dst, src, len);		\
    384 	}						\
    385 } while(0)
    386 #endif
    387 
    388 #ifdef HAVE_MEMCMP
    389 #define SDL_memcmp      memcmp
    390 #else
    391 extern DECLSPEC int SDLCALL SDL_memcmp(const void *s1, const void *s2, size_t len);
    392 #endif
    393 
    394 #ifdef HAVE_STRLEN
    395 #define SDL_strlen      strlen
    396 #else
    397 extern DECLSPEC size_t SDLCALL SDL_strlen(const char *string);
    398 #endif
    399 
    400 #ifdef HAVE_STRLCPY
    401 #define SDL_strlcpy     strlcpy
    402 #else
    403 extern DECLSPEC size_t SDLCALL SDL_strlcpy(char *dst, const char *src, size_t maxlen);
    404 #endif
    405 
    406 #ifdef HAVE_STRLCAT
    407 #define SDL_strlcat    strlcat
    408 #else
    409 extern DECLSPEC size_t SDLCALL SDL_strlcat(char *dst, const char *src, size_t maxlen);
    410 #endif
    411 
    412 #ifdef HAVE_STRDUP
    413 #define SDL_strdup     strdup
    414 #else
    415 extern DECLSPEC char * SDLCALL SDL_strdup(const char *string);
    416 #endif
    417 
    418 #ifdef HAVE__STRREV
    419 #define SDL_strrev      _strrev
    420 #else
    421 extern DECLSPEC char * SDLCALL SDL_strrev(char *string);
    422 #endif
    423 
    424 #ifdef HAVE__STRUPR
    425 #define SDL_strupr      _strupr
    426 #else
    427 extern DECLSPEC char * SDLCALL SDL_strupr(char *string);
    428 #endif
    429 
    430 #ifdef HAVE__STRLWR
    431 #define SDL_strlwr      _strlwr
    432 #else
    433 extern DECLSPEC char * SDLCALL SDL_strlwr(char *string);
    434 #endif
    435 
    436 #ifdef HAVE_STRCHR
    437 #define SDL_strchr      strchr
    438 #elif defined(HAVE_INDEX)
    439 #define SDL_strchr      index
    440 #else
    441 extern DECLSPEC char * SDLCALL SDL_strchr(const char *string, int c);
    442 #endif
    443 
    444 #ifdef HAVE_STRRCHR
    445 #define SDL_strrchr     strrchr
    446 #elif defined(HAVE_RINDEX)
    447 #define SDL_strrchr     rindex
    448 #else
    449 extern DECLSPEC char * SDLCALL SDL_strrchr(const char *string, int c);
    450 #endif
    451 
    452 #ifdef HAVE_STRSTR
    453 #define SDL_strstr      strstr
    454 #else
    455 extern DECLSPEC char * SDLCALL SDL_strstr(const char *haystack, const char *needle);
    456 #endif
    457 
    458 #ifdef HAVE_ITOA
    459 #define SDL_itoa        itoa
    460 #else
    461 #define SDL_itoa(value, string, radix)	SDL_ltoa((long)value, string, radix)
    462 #endif
    463 
    464 #ifdef HAVE__LTOA
    465 #define SDL_ltoa        _ltoa
    466 #else
    467 extern DECLSPEC char * SDLCALL SDL_ltoa(long value, char *string, int radix);
    468 #endif
    469 
    470 #ifdef HAVE__UITOA
    471 #define SDL_uitoa       _uitoa
    472 #else
    473 #define SDL_uitoa(value, string, radix)	SDL_ultoa((long)value, string, radix)
    474 #endif
    475 
    476 #ifdef HAVE__ULTOA
    477 #define SDL_ultoa       _ultoa
    478 #else
    479 extern DECLSPEC char * SDLCALL SDL_ultoa(unsigned long value, char *string, int radix);
    480 #endif
    481 
    482 #ifdef HAVE_STRTOL
    483 #define SDL_strtol      strtol
    484 #else
    485 extern DECLSPEC long SDLCALL SDL_strtol(const char *string, char **endp, int base);
    486 #endif
    487 
    488 #ifdef HAVE_STRTOUL
    489 #define SDL_strtoul      strtoul
    490 #else
    491 extern DECLSPEC unsigned long SDLCALL SDL_strtoul(const char *string, char **endp, int base);
    492 #endif
    493 
    494 #ifdef SDL_HAS_64BIT_TYPE
    495 
    496 #ifdef HAVE__I64TOA
    497 #define SDL_lltoa       _i64toa
    498 #else
    499 extern DECLSPEC char* SDLCALL SDL_lltoa(Sint64 value, char *string, int radix);
    500 #endif
    501 
    502 #ifdef HAVE__UI64TOA
    503 #define SDL_ulltoa      _ui64toa
    504 #else
    505 extern DECLSPEC char* SDLCALL SDL_ulltoa(Uint64 value, char *string, int radix);
    506 #endif
    507 
    508 #ifdef HAVE_STRTOLL
    509 #define SDL_strtoll     strtoll
    510 #else
    511 extern DECLSPEC Sint64 SDLCALL SDL_strtoll(const char *string, char **endp, int base);
    512 #endif
    513 
    514 #ifdef HAVE_STRTOULL
    515 #define SDL_strtoull     strtoull
    516 #else
    517 extern DECLSPEC Uint64 SDLCALL SDL_strtoull(const char *string, char **endp, int base);
    518 #endif
    519 
    520 #endif /* SDL_HAS_64BIT_TYPE */
    521 
    522 #ifdef HAVE_STRTOD
    523 #define SDL_strtod      strtod
    524 #else
    525 extern DECLSPEC double SDLCALL SDL_strtod(const char *string, char **endp);
    526 #endif
    527 
    528 #ifdef HAVE_ATOI
    529 #define SDL_atoi        atoi
    530 #else
    531 #define SDL_atoi(X)     SDL_strtol(X, NULL, 0)
    532 #endif
    533 
    534 #ifdef HAVE_ATOF
    535 #define SDL_atof        atof
    536 #else
    537 #define SDL_atof(X)     SDL_strtod(X, NULL)
    538 #endif
    539 
    540 #ifdef HAVE_STRCMP
    541 #define SDL_strcmp      strcmp
    542 #else
    543 extern DECLSPEC int SDLCALL SDL_strcmp(const char *str1, const char *str2);
    544 #endif
    545 
    546 #ifdef HAVE_STRNCMP
    547 #define SDL_strncmp     strncmp
    548 #else
    549 extern DECLSPEC int SDLCALL SDL_strncmp(const char *str1, const char *str2, size_t maxlen);
    550 #endif
    551 
    552 #ifdef HAVE_STRCASECMP
    553 #define SDL_strcasecmp  strcasecmp
    554 #elif defined(HAVE__STRICMP)
    555 #define SDL_strcasecmp  _stricmp
    556 #else
    557 extern DECLSPEC int SDLCALL SDL_strcasecmp(const char *str1, const char *str2);
    558 #endif
    559 
    560 #ifdef HAVE_STRNCASECMP
    561 #define SDL_strncasecmp strncasecmp
    562 #elif defined(HAVE__STRNICMP)
    563 #define SDL_strncasecmp _strnicmp
    564 #else
    565 extern DECLSPEC int SDLCALL SDL_strncasecmp(const char *str1, const char *str2, size_t maxlen);
    566 #endif
    567 
    568 #ifdef HAVE_SSCANF
    569 #define SDL_sscanf      sscanf
    570 #else
    571 extern DECLSPEC int SDLCALL SDL_sscanf(const char *text, const char *fmt, ...);
    572 #endif
    573 
    574 #ifdef HAVE_SNPRINTF
    575 #define SDL_snprintf    snprintf
    576 #else
    577 extern DECLSPEC int SDLCALL SDL_snprintf(char *text, size_t maxlen, const char *fmt, ...);
    578 #endif
    579 
    580 #ifdef HAVE_VSNPRINTF
    581 #define SDL_vsnprintf   vsnprintf
    582 #else
    583 extern DECLSPEC int SDLCALL SDL_vsnprintf(char *text, size_t maxlen, const char *fmt, va_list ap);
    584 #endif
    585 
    586 /** @name SDL_ICONV Error Codes
    587  *  The SDL implementation of iconv() returns these error codes
    588  */
    589 /*@{*/
    590 #define SDL_ICONV_ERROR		(size_t)-1
    591 #define SDL_ICONV_E2BIG		(size_t)-2
    592 #define SDL_ICONV_EILSEQ	(size_t)-3
    593 #define SDL_ICONV_EINVAL	(size_t)-4
    594 /*@}*/
    595 
    596 #if defined(HAVE_ICONV) && defined(HAVE_ICONV_H)
    597 #define SDL_iconv_t     iconv_t
    598 #define SDL_iconv_open  iconv_open
    599 #define SDL_iconv_close iconv_close
    600 #else
    601 typedef struct _SDL_iconv_t *SDL_iconv_t;
    602 extern DECLSPEC SDL_iconv_t SDLCALL SDL_iconv_open(const char *tocode, const char *fromcode);
    603 extern DECLSPEC int SDLCALL SDL_iconv_close(SDL_iconv_t cd);
    604 #endif
    605 extern DECLSPEC size_t SDLCALL SDL_iconv(SDL_iconv_t cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
    606 /** This function converts a string between encodings in one pass, returning a
    607  *  string that must be freed with SDL_free() or NULL on error.
    608  */
    609 extern DECLSPEC char * SDLCALL SDL_iconv_string(const char *tocode, const char *fromcode, const char *inbuf, size_t inbytesleft);
    610 #define SDL_iconv_utf8_locale(S)	SDL_iconv_string("", "UTF-8", S, SDL_strlen(S)+1)
    611 #define SDL_iconv_utf8_ucs2(S)		(Uint16 *)SDL_iconv_string("UCS-2", "UTF-8", S, SDL_strlen(S)+1)
    612 #define SDL_iconv_utf8_ucs4(S)		(Uint32 *)SDL_iconv_string("UCS-4", "UTF-8", S, SDL_strlen(S)+1)
    613 
    614 /* Ends C function definitions when using C++ */
    615 #ifdef __cplusplus
    616 }
    617 #endif
    618 #include "close_code.h"
    619 
    620 #endif /* _SDL_stdinc_h */
    621