325 lines
9.6 KiB
C
325 lines
9.6 KiB
C
/**
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* PhysicsFS; a portable, flexible file i/o abstraction.
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*
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* Documentation is in physfs.h. It's verbose, honest. :)
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*
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* Please see the file LICENSE in the source's root directory.
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*
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* This file written by Ryan C. Gordon.
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*/
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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/* The macros used to swap values */
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/* Try to use superfast macros on systems that support them */
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#ifdef linux
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#include <asm/byteorder.h>
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#ifdef __arch__swab16
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#define PHYSFS_Swap16 __arch__swab16
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#endif
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#ifdef __arch__swab32
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#define PHYSFS_Swap32 __arch__swab32
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#endif
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#endif /* linux */
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#if (defined _MSC_VER)
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#define __inline__ __inline
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#endif
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#ifndef PHYSFS_Swap16
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static __inline__ PHYSFS_uint16 PHYSFS_Swap16(PHYSFS_uint16 D)
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{
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return((D<<8)|(D>>8));
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}
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#endif
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#ifndef PHYSFS_Swap32
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static __inline__ PHYSFS_uint32 PHYSFS_Swap32(PHYSFS_uint32 D)
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{
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return((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24));
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}
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#endif
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#ifndef PHYSFS_NO_64BIT_SUPPORT
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#ifndef PHYSFS_Swap64
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static __inline__ PHYSFS_uint64 PHYSFS_Swap64(PHYSFS_uint64 val) {
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PHYSFS_uint32 hi, lo;
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/* Separate into high and low 32-bit values and swap them */
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lo = (PHYSFS_uint32)(val&0xFFFFFFFF);
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val >>= 32;
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hi = (PHYSFS_uint32)(val&0xFFFFFFFF);
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val = PHYSFS_Swap32(lo);
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val <<= 32;
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val |= PHYSFS_Swap32(hi);
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return(val);
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}
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#endif
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#else
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#ifndef PHYSFS_Swap64
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/* This is mainly to keep compilers from complaining in PHYSFS code.
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If there is no real 64-bit datatype, then compilers will complain about
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the fake 64-bit datatype that PHYSFS provides when it compiles user code.
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*/
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#define PHYSFS_Swap64(X) (X)
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#endif
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#endif /* PHYSFS_NO_64BIT_SUPPORT */
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/* Byteswap item from the specified endianness to the native endianness */
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#if PHYSFS_BYTEORDER == PHYSFS_LIL_ENDIAN
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PHYSFS_uint16 PHYSFS_swapULE16(PHYSFS_uint16 x) { return(x); }
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PHYSFS_sint16 PHYSFS_swapSLE16(PHYSFS_sint16 x) { return(x); }
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PHYSFS_uint32 PHYSFS_swapULE32(PHYSFS_uint32 x) { return(x); }
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PHYSFS_sint32 PHYSFS_swapSLE32(PHYSFS_sint32 x) { return(x); }
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PHYSFS_uint64 PHYSFS_swapULE64(PHYSFS_uint64 x) { return(x); }
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PHYSFS_sint64 PHYSFS_swapSLE64(PHYSFS_sint64 x) { return(x); }
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PHYSFS_uint16 PHYSFS_swapUBE16(PHYSFS_uint16 x) { return(PHYSFS_Swap16(x)); }
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PHYSFS_sint16 PHYSFS_swapSBE16(PHYSFS_sint16 x) { return(PHYSFS_Swap16(x)); }
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PHYSFS_uint32 PHYSFS_swapUBE32(PHYSFS_uint32 x) { return(PHYSFS_Swap32(x)); }
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PHYSFS_sint32 PHYSFS_swapSBE32(PHYSFS_sint32 x) { return(PHYSFS_Swap32(x)); }
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PHYSFS_uint64 PHYSFS_swapUBE64(PHYSFS_uint64 x) { return(PHYSFS_Swap64(x)); }
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PHYSFS_sint64 PHYSFS_swapSBE64(PHYSFS_sint64 x) { return(PHYSFS_Swap64(x)); }
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#else
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PHYSFS_uint16 PHYSFS_swapULE16(PHYSFS_uint16 x) { return(PHYSFS_Swap16(x)); }
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PHYSFS_sint16 PHYSFS_swapSLE16(PHYSFS_sint16 x) { return(PHYSFS_Swap16(x)); }
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PHYSFS_uint32 PHYSFS_swapULE32(PHYSFS_uint32 x) { return(PHYSFS_Swap32(x)); }
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PHYSFS_sint32 PHYSFS_swapSLE32(PHYSFS_sint32 x) { return(PHYSFS_Swap32(x)); }
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PHYSFS_uint64 PHYSFS_swapULE64(PHYSFS_uint64 x) { return(PHYSFS_Swap64(x)); }
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PHYSFS_sint64 PHYSFS_swapSLE64(PHYSFS_sint64 x) { return(PHYSFS_Swap64(x)); }
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PHYSFS_uint16 PHYSFS_swapUBE16(PHYSFS_uint16 x) { return(x); }
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PHYSFS_sint16 PHYSFS_swapSBE16(PHYSFS_sint16 x) { return(x); }
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PHYSFS_uint32 PHYSFS_swapUBE32(PHYSFS_uint32 x) { return(x); }
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PHYSFS_sint32 PHYSFS_swapSBE32(PHYSFS_sint32 x) { return(x); }
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PHYSFS_uint64 PHYSFS_swapUBE64(PHYSFS_uint64 x) { return(x); }
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PHYSFS_sint64 PHYSFS_swapSBE64(PHYSFS_sint64 x) { return(x); }
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#endif
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int PHYSFS_readSLE16(PHYSFS_File *file, PHYSFS_sint16 *val)
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{
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PHYSFS_sint16 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapSLE16(in);
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return(1);
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} /* PHYSFS_readSLE16 */
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int PHYSFS_readULE16(PHYSFS_File *file, PHYSFS_uint16 *val)
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{
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PHYSFS_uint16 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapULE16(in);
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return(1);
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} /* PHYSFS_readULE16 */
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int PHYSFS_readSBE16(PHYSFS_File *file, PHYSFS_sint16 *val)
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{
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PHYSFS_sint16 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapSBE16(in);
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return(1);
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} /* PHYSFS_readSBE16 */
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int PHYSFS_readUBE16(PHYSFS_File *file, PHYSFS_uint16 *val)
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{
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PHYSFS_uint16 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapUBE16(in);
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return(1);
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} /* PHYSFS_readUBE16 */
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int PHYSFS_readSLE32(PHYSFS_File *file, PHYSFS_sint32 *val)
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{
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PHYSFS_sint32 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapSLE32(in);
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return(1);
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} /* PHYSFS_readSLE32 */
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int PHYSFS_readULE32(PHYSFS_File *file, PHYSFS_uint32 *val)
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{
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PHYSFS_uint32 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapULE32(in);
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return(1);
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} /* PHYSFS_readULE32 */
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int PHYSFS_readSBE32(PHYSFS_File *file, PHYSFS_sint32 *val)
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{
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PHYSFS_sint32 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapSBE32(in);
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return(1);
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} /* PHYSFS_readSBE32 */
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int PHYSFS_readUBE32(PHYSFS_File *file, PHYSFS_uint32 *val)
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{
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PHYSFS_uint32 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapUBE32(in);
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return(1);
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} /* PHYSFS_readUBE32 */
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int PHYSFS_readSLE64(PHYSFS_File *file, PHYSFS_sint64 *val)
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{
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PHYSFS_sint64 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapSLE64(in);
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return(1);
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} /* PHYSFS_readSLE64 */
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int PHYSFS_readULE64(PHYSFS_File *file, PHYSFS_uint64 *val)
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{
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PHYSFS_uint64 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapULE64(in);
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return(1);
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} /* PHYSFS_readULE64 */
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int PHYSFS_readSBE64(PHYSFS_File *file, PHYSFS_sint64 *val)
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{
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PHYSFS_sint64 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapSBE64(in);
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return(1);
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} /* PHYSFS_readSBE64 */
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int PHYSFS_readUBE64(PHYSFS_File *file, PHYSFS_uint64 *val)
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{
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PHYSFS_uint64 in;
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BAIL_IF_MACRO(val == NULL, ERR_INVALID_ARGUMENT, 0);
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BAIL_IF_MACRO(PHYSFS_read(file, &in, sizeof (in), 1) != 1, NULL, 0);
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*val = PHYSFS_swapUBE64(in);
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return(1);
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} /* PHYSFS_readUBE64 */
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int PHYSFS_writeSLE16(PHYSFS_File *file, PHYSFS_sint16 val)
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{
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PHYSFS_sint16 out = PHYSFS_swapSLE16(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeSLE16 */
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int PHYSFS_writeULE16(PHYSFS_File *file, PHYSFS_uint16 val)
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{
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PHYSFS_uint16 out = PHYSFS_swapULE16(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeULE16 */
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int PHYSFS_writeSBE16(PHYSFS_File *file, PHYSFS_sint16 val)
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{
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PHYSFS_sint16 out = PHYSFS_swapSBE16(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeSBE16 */
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int PHYSFS_writeUBE16(PHYSFS_File *file, PHYSFS_uint16 val)
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{
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PHYSFS_uint16 out = PHYSFS_swapUBE16(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeUBE16 */
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int PHYSFS_writeSLE32(PHYSFS_File *file, PHYSFS_sint32 val)
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{
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PHYSFS_sint32 out = PHYSFS_swapSLE32(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeSLE32 */
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int PHYSFS_writeULE32(PHYSFS_File *file, PHYSFS_uint32 val)
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{
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PHYSFS_uint32 out = PHYSFS_swapULE32(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeULE32 */
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int PHYSFS_writeSBE32(PHYSFS_File *file, PHYSFS_sint32 val)
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{
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PHYSFS_sint32 out = PHYSFS_swapSBE32(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeSBE32 */
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int PHYSFS_writeUBE32(PHYSFS_File *file, PHYSFS_uint32 val)
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{
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PHYSFS_uint32 out = PHYSFS_swapUBE32(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeUBE32 */
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int PHYSFS_writeSLE64(PHYSFS_File *file, PHYSFS_sint64 val)
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{
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PHYSFS_sint64 out = PHYSFS_swapSLE64(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeSLE64 */
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int PHYSFS_writeULE64(PHYSFS_File *file, PHYSFS_uint64 val)
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{
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PHYSFS_uint64 out = PHYSFS_swapULE64(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeULE64 */
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int PHYSFS_writeSBE64(PHYSFS_File *file, PHYSFS_sint64 val)
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{
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PHYSFS_sint64 out = PHYSFS_swapSBE64(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeSBE64 */
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int PHYSFS_writeUBE64(PHYSFS_File *file, PHYSFS_uint64 val)
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{
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PHYSFS_uint64 out = PHYSFS_swapUBE64(val);
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BAIL_IF_MACRO(PHYSFS_write(file, &out, sizeof (out), 1) != 1, NULL, 0);
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return(1);
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} /* PHYSFS_writeUBE64 */
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/* end of physfs_byteorder.c ... */
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