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Diffstat (limited to 'scummsys.h')
-rw-r--r-- | scummsys.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/scummsys.h b/scummsys.h new file mode 100644 index 0000000000..ae91e1e3e5 --- /dev/null +++ b/scummsys.h @@ -0,0 +1,152 @@ +/* ScummVM - Scumm Interpreter + * Copyright (C) 2001 Ludvig Strigeus + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Change Log: + * $Log$ + * Revision 1.1 2001/10/09 14:30:14 strigeus + * Initial revision + * + * + */ + +#if defined(WIN32) + +#define SCUMM_LITTLE_ENDIAN + +#define FORCEINLINE __forceinline +#define NORETURN _declspec(noreturn) + +typedef unsigned char byte; +typedef unsigned char uint8; +typedef unsigned short uint16; +typedef unsigned long uint32; +typedef unsigned int uint; +typedef signed char int8; +typedef signed short int16; +typedef signed long int32; + +#define START_PACK_STRUCTS pack (push,1) +#define END_PACK_STRUCTS pack(pop) + +#elif defined(UNIX) + +#define FORCEINLINE inline +#define NORETURN +#define CDECL + +typedef unsigned char byte; +typedef unsigned char uint8; +typedef unsigned short uint16; +typedef unsigned long uint32; +typedef unsigned int uint; +typedef signed char int8; +typedef signed short int16; +typedef signed long int32; + +#define START_PACK_STRUCTS pack (1) +#define END_PACK_STRUCTS pack () + +#else +#error No system type defined +#endif + + +#if defined(SCUMM_LITTLE_ENDIAN) + +#if defined(SCUMM_NEED_ALIGNMENT) +#error Little endian processors that need alignment is not implemented +#endif + +#define MKID(a) ((((a)>>24)&0xFF) | (((a)>>8)&0xFF00) | (((a)<<8)&0xFF0000) | (((a)<<24)&0xFF000000)) + +int FORCEINLINE READ_LE_UINT16(void *ptr) { + return *(uint16*)(ptr); +} + +int FORCEINLINE READ_BE_UINT16(void *ptr) { + return (((byte*)ptr)[0]<<8)|((byte*)ptr)[1]; +} + +uint32 FORCEINLINE READ_LE_UINT32(void *ptr) { + return *(uint32*)(ptr); +} + +uint32 FORCEINLINE READ_BE_UINT32(void *ptr) { + byte *b = (byte*)ptr; + return (b[0]<<24)+(b[1]<<16)+(b[2]<<8)+(b[3]); +} + +#define READ_BE_UINT32_UNALIGNED READ_BE_UINT32 +#define READ_BE_UINT16_UNALIGNED READ_BE_UINT16 + +#define READ_UINT32_UNALIGNED(a) (*((uint32*)a)) + +#define FROM_LE_32(__a__) __a__ +#define FROM_LE_16(__a__) __a__ + +#define TO_BE_32(a) ((((a)>>24)&0xFF) | (((a)>>8)&0xFF00) | (((a)<<8)&0xFF0000) | (((a)<<24)&0xFF000000)) + +#elif defined(SCUMM_BIG_ENDIAN) + +#define MKID(a) (a) + +uint32 FORCEINLINE FROM_LE_32(uint32 a) { + return ((a>>24)&0xFF) + ((a>>8)&0xFF00) + ((a<<8)&0xFF0000) + ((a<<24)&0xFF000000); +} + +uint16 FORCEINLINE FROM_LE_16(uint16 a) { + return ((a>>8)&0xFF) + ((a<<8)&0xFF00); +} + +uint32 FORCEINLINE READ_LE_UINT32(void *ptr) { + byte *b = (byte*)ptr; + return (b[3]<<24)+(b[2]<<16)+(b[1]<<8)+(b[0]); +} + +uint32 FORCEINLINE READ_BE_UINT32(void *ptr) { + return *(uint32*)(ptr); +} + +int FORCEINLINE READ_LE_UINT16(void *ptr) { + byte *b = (byte*)ptr; + return (b[1]<<8) + b[0]; +} + +int FORCEINLINE READ_BE_UINT16(void *ptr) { + return *(uint16*)(ptr); +} + +int FORCEINLINE READ_BE_UINT16_UNALIGNED(void *ptr) { + return (((byte*)ptr)[0]<<8)|((byte*)ptr)[1]; +} + + +uint32 FORCEINLINE READ_BE_UINT32_UNALIGNED(void *ptr) { + byte *b = (byte*)ptr; + return (b[0]<<24)+(b[1]<<16)+(b[2]<<8)+(b[3]); +} + +#define READ_UINT32_UNALIGNED READ_BE_UINT32_UNALIGNED + +#define TO_BE_32(a) (a) + +#else + +#error No endianness defined + +#endif + |