/**

 * PhysicsFS; a portable, flexible file i/o abstraction.

 *

 * Documentation is in physfs.h. It's verbose, honest.  :)

 *

 * Please see the file LICENSE.txt in the source's root directory.

 *

 *  This file written by Ryan C. Gordon.

 */

#define __PHYSICSFS_INTERNAL__

#include "physfs_internal.h"

#ifndef PHYSFS_Swap16

static inline PHYSFS_uint16 PHYSFS_Swap16(PHYSFS_uint16 D)

{

    return ((D<<8)|(D>>8));

}

#endif

#ifndef PHYSFS_Swap32

static inline PHYSFS_uint32 PHYSFS_Swap32(PHYSFS_uint32 D)

{

    return ((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24));

}

#endif

#ifndef PHYSFS_NO_64BIT_SUPPORT

#ifndef PHYSFS_Swap64

static inline PHYSFS_uint64 PHYSFS_Swap64(PHYSFS_uint64 val) {

    PHYSFS_uint32 hi, lo;

    /* Separate into high and low 32-bit values and swap them */

    lo = (PHYSFS_uint32)(val&0xFFFFFFFF);

    val >>= 32;

    hi = (PHYSFS_uint32)(val&0xFFFFFFFF);

    val = PHYSFS_Swap32(lo);

    val <<= 32;

    val |= PHYSFS_Swap32(hi);

    return val;

}

#endif

#else

#ifndef PHYSFS_Swap64

/* This is mainly to keep compilers from complaining in PHYSFS code.

   If there is no real 64-bit datatype, then compilers will complain about

   the fake 64-bit datatype that PHYSFS provides when it compiles user code.

*/

#define PHYSFS_Swap64(X)    (X)

#endif

#endif /* PHYSFS_NO_64BIT_SUPPORT */

/* Byteswap item from the specified endianness to the native endianness */

#if PHYSFS_BYTEORDER == PHYSFS_LIL_ENDIAN

PHYSFS_uint16 PHYSFS_swapULE16(PHYSFS_uint16 x) { return x; }

PHYSFS_sint16 PHYSFS_swapSLE16(PHYSFS_sint16 x) { return x; }

PHYSFS_uint32 PHYSFS_swapULE32(PHYSFS_uint32 x) { return x; }

PHYSFS_sint32 PHYSFS_swapSLE32(PHYSFS_sint32 x) { return x; }

PHYSFS_uint64 PHYSFS_swapULE64(PHYSFS_uint64 x) { return x; }

PHYSFS_sint64 PHYSFS_swapSLE64(PHYSFS_sint64 x) { return x; }

PHYSFS_uint16 PHYSFS_swapUBE16(PHYSFS_uint16 x) { return PHYSFS_Swap16(x); }

PHYSFS_sint16 PHYSFS_swapSBE16(PHYSFS_sint16 x) { return PHYSFS_Swap16(x); }

PHYSFS_uint32 PHYSFS_swapUBE32(PHYSFS_uint32 x) { return PHYSFS_Swap32(x); }

PHYSFS_sint32 PHYSFS_swapSBE32(PHYSFS_sint32 x) { return PHYSFS_Swap32(x); }

PHYSFS_uint64 PHYSFS_swapUBE64(PHYSFS_uint64 x) { return PHYSFS_Swap64(x); }

PHYSFS_sint64 PHYSFS_swapSBE64(PHYSFS_sint64 x) { return PHYSFS_Swap64(x); }

#else

PHYSFS_uint16 PHYSFS_swapULE16(PHYSFS_uint16 x) { return PHYSFS_Swap16(x); }

PHYSFS_sint16 PHYSFS_swapSLE16(PHYSFS_sint16 x) { return PHYSFS_Swap16(x); }

PHYSFS_uint32 PHYSFS_swapULE32(PHYSFS_uint32 x) { return PHYSFS_Swap32(x); }

PHYSFS_sint32 PHYSFS_swapSLE32(PHYSFS_sint32 x) { return PHYSFS_Swap32(x); }

PHYSFS_uint64 PHYSFS_swapULE64(PHYSFS_uint64 x) { return PHYSFS_Swap64(x); }

PHYSFS_sint64 PHYSFS_swapSLE64(PHYSFS_sint64 x) { return PHYSFS_Swap64(x); }

PHYSFS_uint16 PHYSFS_swapUBE16(PHYSFS_uint16 x) { return x; }

PHYSFS_sint16 PHYSFS_swapSBE16(PHYSFS_sint16 x) { return x; }

PHYSFS_uint32 PHYSFS_swapUBE32(PHYSFS_uint32 x) { return x; }

PHYSFS_sint32 PHYSFS_swapSBE32(PHYSFS_sint32 x) { return x; }

PHYSFS_uint64 PHYSFS_swapUBE64(PHYSFS_uint64 x) { return x; }

PHYSFS_sint64 PHYSFS_swapSBE64(PHYSFS_sint64 x) { return x; }

#endif

static inline int readAll(PHYSFS_File *file, void *val, const size_t len)

{

    return (PHYSFS_readBytes(file, val, len) == len);

} /* readAll */

#define PHYSFS_BYTEORDER_READ(datatype, swaptype) \

    int PHYSFS_read##swaptype(PHYSFS_File *file, PHYSFS_##datatype *val) { \

        PHYSFS_##datatype in; \

        BAIL_IF_MACRO(val == NULL, PHYSFS_ERR_INVALID_ARGUMENT, 0); \

        BAIL_IF_MACRO(!readAll(file, &in, sizeof (in)), ERRPASS, 0); \

        *val = PHYSFS_swap##swaptype(in); \

        return 1; \

    }

PHYSFS_BYTEORDER_READ(sint16, SLE16)

PHYSFS_BYTEORDER_READ(uint16, ULE16)

PHYSFS_BYTEORDER_READ(sint16, SBE16)

PHYSFS_BYTEORDER_READ(uint16, UBE16)

PHYSFS_BYTEORDER_READ(sint32, SLE32)

PHYSFS_BYTEORDER_READ(uint32, ULE32)

PHYSFS_BYTEORDER_READ(sint32, SBE32)

PHYSFS_BYTEORDER_READ(uint32, UBE32)

PHYSFS_BYTEORDER_READ(sint64, SLE64)

PHYSFS_BYTEORDER_READ(uint64, ULE64)

PHYSFS_BYTEORDER_READ(sint64, SBE64)

PHYSFS_BYTEORDER_READ(uint64, UBE64)

static inline int writeAll(PHYSFS_File *f, const void *val, const size_t len)

{

    return (PHYSFS_writeBytes(f, val, len) == len);

} /* writeAll */

#define PHYSFS_BYTEORDER_WRITE(datatype, swaptype) \

    int PHYSFS_write##swaptype(PHYSFS_File *file, PHYSFS_##datatype val) { \

        const PHYSFS_##datatype out = PHYSFS_swap##swaptype(val); \

        BAIL_IF_MACRO(!writeAll(file, &out, sizeof (out)), ERRPASS, 0); \

        return 1; \

    }

PHYSFS_BYTEORDER_WRITE(sint16, SLE16)

PHYSFS_BYTEORDER_WRITE(uint16, ULE16)

PHYSFS_BYTEORDER_WRITE(sint16, SBE16)

PHYSFS_BYTEORDER_WRITE(uint16, UBE16)

PHYSFS_BYTEORDER_WRITE(sint32, SLE32)

PHYSFS_BYTEORDER_WRITE(uint32, ULE32)

PHYSFS_BYTEORDER_WRITE(sint32, SBE32)

PHYSFS_BYTEORDER_WRITE(uint32, UBE32)

PHYSFS_BYTEORDER_WRITE(sint64, SLE64)

PHYSFS_BYTEORDER_WRITE(uint64, ULE64)

PHYSFS_BYTEORDER_WRITE(sint64, SBE64)

PHYSFS_BYTEORDER_WRITE(uint64, UBE64)

/* end of physfs_byteorder.c ... */