1/**
2 * PhysicsFS; a portable, flexible file i/o abstraction.
3 *
4 * Documentation is in physfs.h. It's verbose, honest. :)
5 *
6 * Please see the file LICENSE.txt in the source's root directory.
7 *
8 * This file written by Ryan C. Gordon.
9 */
10
11#define __PHYSICSFS_INTERNAL__
12#include "physfs_internal.h"
13
14#ifndef PHYSFS_Swap16
15static inline PHYSFS_uint16 PHYSFS_Swap16(PHYSFS_uint16 D)
16{
17 return ((D<<8)|(D>>8));
18}
19#endif
20#ifndef PHYSFS_Swap32
21static inline PHYSFS_uint32 PHYSFS_Swap32(PHYSFS_uint32 D)
22{
23 return ((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24));
24}
25#endif
26#ifndef PHYSFS_NO_64BIT_SUPPORT
27#ifndef PHYSFS_Swap64
28static inline PHYSFS_uint64 PHYSFS_Swap64(PHYSFS_uint64 val) {
29 PHYSFS_uint32 hi, lo;
30
31 /* Separate into high and low 32-bit values and swap them */
32 lo = (PHYSFS_uint32)(val&0xFFFFFFFF);
33 val >>= 32;
34 hi = (PHYSFS_uint32)(val&0xFFFFFFFF);
35 val = PHYSFS_Swap32(lo);
36 val <<= 32;
37 val |= PHYSFS_Swap32(hi);
38 return val;
39}
40#endif
41#else
42#ifndef PHYSFS_Swap64
43/* This is mainly to keep compilers from complaining in PHYSFS code.
44 If there is no real 64-bit datatype, then compilers will complain about
45 the fake 64-bit datatype that PHYSFS provides when it compiles user code.
46*/
47#define PHYSFS_Swap64(X) (X)
48#endif
49#endif /* PHYSFS_NO_64BIT_SUPPORT */
50
51
52/* Byteswap item from the specified endianness to the native endianness */
53#if PHYSFS_BYTEORDER == PHYSFS_LIL_ENDIAN
54PHYSFS_uint16 PHYSFS_swapULE16(PHYSFS_uint16 x) { return x; }
55PHYSFS_sint16 PHYSFS_swapSLE16(PHYSFS_sint16 x) { return x; }
56PHYSFS_uint32 PHYSFS_swapULE32(PHYSFS_uint32 x) { return x; }
57PHYSFS_sint32 PHYSFS_swapSLE32(PHYSFS_sint32 x) { return x; }
58PHYSFS_uint64 PHYSFS_swapULE64(PHYSFS_uint64 x) { return x; }
59PHYSFS_sint64 PHYSFS_swapSLE64(PHYSFS_sint64 x) { return x; }
60
61PHYSFS_uint16 PHYSFS_swapUBE16(PHYSFS_uint16 x) { return PHYSFS_Swap16(x); }
62PHYSFS_sint16 PHYSFS_swapSBE16(PHYSFS_sint16 x) { return PHYSFS_Swap16(x); }
63PHYSFS_uint32 PHYSFS_swapUBE32(PHYSFS_uint32 x) { return PHYSFS_Swap32(x); }
64PHYSFS_sint32 PHYSFS_swapSBE32(PHYSFS_sint32 x) { return PHYSFS_Swap32(x); }
65PHYSFS_uint64 PHYSFS_swapUBE64(PHYSFS_uint64 x) { return PHYSFS_Swap64(x); }
66PHYSFS_sint64 PHYSFS_swapSBE64(PHYSFS_sint64 x) { return PHYSFS_Swap64(x); }
67#else
68PHYSFS_uint16 PHYSFS_swapULE16(PHYSFS_uint16 x) { return PHYSFS_Swap16(x); }
69PHYSFS_sint16 PHYSFS_swapSLE16(PHYSFS_sint16 x) { return PHYSFS_Swap16(x); }
70PHYSFS_uint32 PHYSFS_swapULE32(PHYSFS_uint32 x) { return PHYSFS_Swap32(x); }
71PHYSFS_sint32 PHYSFS_swapSLE32(PHYSFS_sint32 x) { return PHYSFS_Swap32(x); }
72PHYSFS_uint64 PHYSFS_swapULE64(PHYSFS_uint64 x) { return PHYSFS_Swap64(x); }
73PHYSFS_sint64 PHYSFS_swapSLE64(PHYSFS_sint64 x) { return PHYSFS_Swap64(x); }
74
75PHYSFS_uint16 PHYSFS_swapUBE16(PHYSFS_uint16 x) { return x; }
76PHYSFS_sint16 PHYSFS_swapSBE16(PHYSFS_sint16 x) { return x; }
77PHYSFS_uint32 PHYSFS_swapUBE32(PHYSFS_uint32 x) { return x; }
78PHYSFS_sint32 PHYSFS_swapSBE32(PHYSFS_sint32 x) { return x; }
79PHYSFS_uint64 PHYSFS_swapUBE64(PHYSFS_uint64 x) { return x; }
80PHYSFS_sint64 PHYSFS_swapSBE64(PHYSFS_sint64 x) { return x; }
81#endif
82
83static inline int readAll(PHYSFS_File *file, void *val, const size_t len)
84{
85 return (PHYSFS_readBytes(file, val, len) == len);
86} /* readAll */
87
88#define PHYSFS_BYTEORDER_READ(datatype, swaptype) \
89 int PHYSFS_read##swaptype(PHYSFS_File *file, PHYSFS_##datatype *val) { \
90 PHYSFS_##datatype in; \
91 BAIL_IF(val == NULL, PHYSFS_ERR_INVALID_ARGUMENT, 0); \
92 BAIL_IF_ERRPASS(!readAll(file, &in, sizeof (in)), 0); \
93 *val = PHYSFS_swap##swaptype(in); \
94 return 1; \
95 }
96
97PHYSFS_BYTEORDER_READ(sint16, SLE16)
98PHYSFS_BYTEORDER_READ(uint16, ULE16)
99PHYSFS_BYTEORDER_READ(sint16, SBE16)
100PHYSFS_BYTEORDER_READ(uint16, UBE16)
101PHYSFS_BYTEORDER_READ(sint32, SLE32)
102PHYSFS_BYTEORDER_READ(uint32, ULE32)
103PHYSFS_BYTEORDER_READ(sint32, SBE32)
104PHYSFS_BYTEORDER_READ(uint32, UBE32)
105PHYSFS_BYTEORDER_READ(sint64, SLE64)
106PHYSFS_BYTEORDER_READ(uint64, ULE64)
107PHYSFS_BYTEORDER_READ(sint64, SBE64)
108PHYSFS_BYTEORDER_READ(uint64, UBE64)
109
110
111static inline int writeAll(PHYSFS_File *f, const void *val, const size_t len)
112{
113 return (PHYSFS_writeBytes(f, val, len) == len);
114} /* writeAll */
115
116#define PHYSFS_BYTEORDER_WRITE(datatype, swaptype) \
117 int PHYSFS_write##swaptype(PHYSFS_File *file, PHYSFS_##datatype val) { \
118 const PHYSFS_##datatype out = PHYSFS_swap##swaptype(val); \
119 BAIL_IF_ERRPASS(!writeAll(file, &out, sizeof (out)), 0); \
120 return 1; \
121 }
122
123PHYSFS_BYTEORDER_WRITE(sint16, SLE16)
124PHYSFS_BYTEORDER_WRITE(uint16, ULE16)
125PHYSFS_BYTEORDER_WRITE(sint16, SBE16)
126PHYSFS_BYTEORDER_WRITE(uint16, UBE16)
127PHYSFS_BYTEORDER_WRITE(sint32, SLE32)
128PHYSFS_BYTEORDER_WRITE(uint32, ULE32)
129PHYSFS_BYTEORDER_WRITE(sint32, SBE32)
130PHYSFS_BYTEORDER_WRITE(uint32, UBE32)
131PHYSFS_BYTEORDER_WRITE(sint64, SLE64)
132PHYSFS_BYTEORDER_WRITE(uint64, ULE64)
133PHYSFS_BYTEORDER_WRITE(sint64, SBE64)
134PHYSFS_BYTEORDER_WRITE(uint64, UBE64)
135
136/* end of physfs_byteorder.c ... */
137
138