misc/libphysfs/physfs_byteorder.c
author Wuzzy <Wuzzy2@mail.ru>
Fri, 09 Mar 2018 19:05:59 +0100
changeset 13145 5083fb0a2992
parent 8524 a65e9bcf0a03
permissions -rw-r--r--
A Classic Fairytale: Harden all missions against missing campaign variables in team file and assume default values This assumes the worst case in which the team file is missing all campaign variables except Progress. This has been successfully tested with all 10 missions and still generates a logical storyline. By default, the game assumes: - The cyborg's offer in mission 2 was refused - The traitor in mission 5 was killed As a consequence, missions 8 and 10 use the princessScene cut scene.
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/**
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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.txt 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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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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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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static inline int readAll(PHYSFS_File *file, void *val, const size_t len)
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{
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    return (PHYSFS_readBytes(file, val, len) == len);
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} /* readAll */
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#define PHYSFS_BYTEORDER_READ(datatype, swaptype) \
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    int PHYSFS_read##swaptype(PHYSFS_File *file, PHYSFS_##datatype *val) { \
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        PHYSFS_##datatype in; \
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        BAIL_IF_MACRO(val == NULL, PHYSFS_ERR_INVALID_ARGUMENT, 0); \
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        BAIL_IF_MACRO(!readAll(file, &in, sizeof (in)), ERRPASS, 0); \
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        *val = PHYSFS_swap##swaptype(in); \
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        return 1; \
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    }
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PHYSFS_BYTEORDER_READ(sint16, SLE16)
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PHYSFS_BYTEORDER_READ(uint16, ULE16)
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PHYSFS_BYTEORDER_READ(sint16, SBE16)
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PHYSFS_BYTEORDER_READ(uint16, UBE16)
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PHYSFS_BYTEORDER_READ(sint32, SLE32)
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PHYSFS_BYTEORDER_READ(uint32, ULE32)
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PHYSFS_BYTEORDER_READ(sint32, SBE32)
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PHYSFS_BYTEORDER_READ(uint32, UBE32)
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PHYSFS_BYTEORDER_READ(sint64, SLE64)
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PHYSFS_BYTEORDER_READ(uint64, ULE64)
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PHYSFS_BYTEORDER_READ(sint64, SBE64)
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PHYSFS_BYTEORDER_READ(uint64, UBE64)
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static inline int writeAll(PHYSFS_File *f, const void *val, const size_t len)
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{
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    return (PHYSFS_writeBytes(f, val, len) == len);
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} /* writeAll */
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#define PHYSFS_BYTEORDER_WRITE(datatype, swaptype) \
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    int PHYSFS_write##swaptype(PHYSFS_File *file, PHYSFS_##datatype val) { \
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        const PHYSFS_##datatype out = PHYSFS_swap##swaptype(val); \
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        BAIL_IF_MACRO(!writeAll(file, &out, sizeof (out)), ERRPASS, 0); \
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        return 1; \
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    }
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PHYSFS_BYTEORDER_WRITE(sint16, SLE16)
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PHYSFS_BYTEORDER_WRITE(uint16, ULE16)
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PHYSFS_BYTEORDER_WRITE(sint16, SBE16)
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PHYSFS_BYTEORDER_WRITE(uint16, UBE16)
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PHYSFS_BYTEORDER_WRITE(sint32, SLE32)
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PHYSFS_BYTEORDER_WRITE(uint32, ULE32)
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PHYSFS_BYTEORDER_WRITE(sint32, SBE32)
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PHYSFS_BYTEORDER_WRITE(uint32, UBE32)
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PHYSFS_BYTEORDER_WRITE(sint64, SLE64)
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PHYSFS_BYTEORDER_WRITE(uint64, ULE64)
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PHYSFS_BYTEORDER_WRITE(sint64, SBE64)
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PHYSFS_BYTEORDER_WRITE(uint64, UBE64)
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/* end of physfs_byteorder.c ... */
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