include/SDL_types.h
author Sam Lantinga <slouken@libsdl.org>
Mon, 06 Feb 2006 08:28:51 +0000
changeset 1330 450721ad5436
parent 1312 c9b51268668f
child 1345 7f32b9bede06
permissions -rw-r--r--
It's now possible to build SDL without any C runtime at all on Windows,
using Visual C++ 2005
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 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 /* General data types used by the SDL library */
    24 
    25 #ifndef _SDL_types_h
    26 #define _SDL_types_h
    27 
    28 #include <sys/types.h>
    29 #ifdef _MSC_VER
    30 #include <crtdefs.h>	/* For size_t */
    31 #endif
    32 
    33 /* The number of elements in an array */
    34 #define SDL_arraysize(array)	(sizeof(array)/sizeof(array[0]))
    35 #define SDL_TABLESIZE(table)	SDL_arraysize(table)
    36 
    37 /* Basic data types */
    38 typedef enum SDL_bool {
    39 	SDL_FALSE = 0,
    40 	SDL_TRUE  = 1
    41 } SDL_bool;
    42 
    43 #ifdef H_MMBASIC /* mmbasic.h (Tru64 MME) */
    44 /* Some of the basic types are already defined in mmbasic.h */
    45 typedef signed char	Sint8;
    46 typedef signed short	Sint16;
    47 typedef signed int	Sint32;
    48 #else
    49 typedef unsigned char	Uint8;
    50 typedef signed char	Sint8;
    51 typedef unsigned short	Uint16;
    52 typedef signed short	Sint16;
    53 typedef unsigned int	Uint32;
    54 typedef signed int	Sint32;
    55 #endif
    56 
    57 /* Figure out how to support 64-bit datatypes */
    58 #if !defined(__STRICT_ANSI__)
    59 #ifdef __osf__ /* Tru64 */
    60 #define SDL_HAS_64BIT_TYPE	long
    61 #elif defined(__GNUC__) || defined(__MWERKS__) || defined(__SUNPRO_C) || defined(__DECC) || defined(__WATCOMC__)
    62 #define SDL_HAS_64BIT_TYPE	long long
    63 #elif defined(_MSC_VER) /* VC++ */
    64 #define SDL_HAS_64BIT_TYPE	__int64
    65 #endif
    66 #endif /* !__STRICT_ANSI__ */
    67 
    68 /* The 64-bit type isn't available on EPOC/Symbian OS */
    69 #ifdef __SYMBIAN32__
    70 #undef SDL_HAS_64BIT_TYPE
    71 #endif
    72 
    73 /* The 64-bit datatype isn't supported on all platforms */
    74 #ifdef SDL_HAS_64BIT_TYPE
    75 #ifndef H_MMBASIC
    76 typedef unsigned SDL_HAS_64BIT_TYPE Uint64;
    77 #endif
    78 typedef SDL_HAS_64BIT_TYPE Sint64;
    79 #else
    80 /* This is really just a hack to prevent the compiler from complaining */
    81 typedef struct {
    82 	Uint32 hi;
    83 	Uint32 lo;
    84 } Uint64, Sint64;
    85 #endif
    86 
    87 /* Make sure the types really have the right sizes */
    88 #define SDL_COMPILE_TIME_ASSERT(name, x)               \
    89        typedef int SDL_dummy_ ## name[(x) * 2 - 1]
    90 
    91 SDL_COMPILE_TIME_ASSERT(uint8, sizeof(Uint8) == 1);
    92 SDL_COMPILE_TIME_ASSERT(sint8, sizeof(Sint8) == 1);
    93 SDL_COMPILE_TIME_ASSERT(uint16, sizeof(Uint16) == 2);
    94 SDL_COMPILE_TIME_ASSERT(sint16, sizeof(Sint16) == 2);
    95 SDL_COMPILE_TIME_ASSERT(uint32, sizeof(Uint32) == 4);
    96 SDL_COMPILE_TIME_ASSERT(sint32, sizeof(Sint32) == 4);
    97 SDL_COMPILE_TIME_ASSERT(uint64, sizeof(Uint64) == 8);
    98 SDL_COMPILE_TIME_ASSERT(sint64, sizeof(Sint64) == 8);
    99 
   100 /* Check to make sure enums are the size of ints, for structure packing.
   101    For both Watcom C/C++ and Borland C/C++ the compiler option that makes
   102    enums having the size of an int must be enabled.
   103    This is "-b" for Borland C/C++ and "-ei" for Watcom C/C++ (v11).
   104 */
   105 /* Enable enums always int in CodeWarrior (for MPW use "-enum int") */
   106 #ifdef __MWERKS__
   107 #pragma enumsalwaysint on
   108 #endif
   109 
   110 typedef enum {
   111 	DUMMY_ENUM_VALUE
   112 } SDL_DUMMY_ENUM;
   113 
   114 SDL_COMPILE_TIME_ASSERT(enum, sizeof(SDL_DUMMY_ENUM) == sizeof(int));
   115 
   116 #endif