src/util/common.h (view raw)
1/* Copyright (c) 2013-2014 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#ifndef COMMON_H
7#define COMMON_H
8
9#include <ctype.h>
10#include <fcntl.h>
11#include <inttypes.h>
12#include <limits.h>
13#include <math.h>
14#include <stdarg.h>
15#include <stdbool.h>
16#include <stddef.h>
17#include <stdint.h>
18#include <stdio.h>
19#include <stdlib.h>
20#include <string.h>
21
22#include "version.h"
23
24#ifdef _MSC_VER
25typedef intptr_t off_t;
26typedef intptr_t ssize_t;
27#define restrict __restrict
28#define strcasecmp _stricmp
29#define strncasecmp _strnicmp
30#define ftruncate _chsize
31#elif defined(__wii__)
32typedef int32_t ssize_t;
33#define SSIZE_MAX ((ssize_t) SIZE_MAX)
34#else
35#include <strings.h>
36#include <unistd.h>
37#endif
38
39#ifndef SSIZE_MAX
40#define SSIZE_MAX ((ssize_t) (SIZE_MAX >> 1))
41#endif
42
43#define UNUSED(V) (void)(V)
44
45#ifndef M_PI
46#define M_PI 3.141592654f
47#endif
48
49#if defined(__PPC__) || defined(__POWERPC__)
50#define LOAD_32LE(DEST, ADDR, ARR) { \
51 uint32_t _addr = (ADDR); \
52 void* _ptr = (ARR); \
53 __asm__("lwbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
54}
55
56#define LOAD_16LE(DEST, ADDR, ARR) { \
57 uint32_t _addr = (ADDR); \
58 void* _ptr = (ARR); \
59 __asm__("lhbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
60}
61
62#define STORE_32LE(SRC, ADDR, ARR) { \
63 uint32_t _addr = (ADDR); \
64 void* _ptr = (ARR); \
65 __asm__("stwbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr)); \
66}
67
68#define STORE_16LE(SRC, ADDR, ARR) { \
69 uint32_t _addr = (ADDR); \
70 void* _ptr = (ARR); \
71 __asm__("sthbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr)); \
72}
73#else
74#define LOAD_32LE(DEST, ADDR, ARR) DEST = ((uint32_t*) ARR)[(ADDR) >> 2]
75#define LOAD_16LE(DEST, ADDR, ARR) DEST = ((uint16_t*) ARR)[(ADDR) >> 1]
76#define STORE_32LE(SRC, ADDR, ARR) ((uint32_t*) ARR)[(ADDR) >> 2] = SRC
77#define STORE_16LE(SRC, ADDR, ARR) ((uint16_t*) ARR)[(ADDR) >> 1] = SRC
78#endif
79
80#define MAKE_MASK(START, END) (((1 << ((END) - (START))) - 1) << (START))
81#define CHECK_BITS(SRC, START, END) ((SRC) & MAKE_MASK(START, END))
82#define EXT_BITS(SRC, START, END) (((SRC) >> (START)) & ((1 << ((END) - (START))) - 1))
83#define INS_BITS(SRC, START, END, BITS) (CLEAR_BITS(SRC, START, END) | (((BITS) << (START)) & MAKE_MASK(START, END)))
84#define CLEAR_BITS(SRC, START, END) ((SRC) & ~MAKE_MASK(START, END))
85#define FILL_BITS(SRC, START, END) ((SRC) | MAKE_MASK(START, END))
86
87#ifdef _MSC_VER
88#define ATTRIBUTE_UNUSED
89#define ATTRIBUTE_FORMAT(X, Y, Z)
90#else
91#define ATTRIBUTE_UNUSED __attribute__((unused))
92#define ATTRIBUTE_FORMAT(X, Y, Z) __attribute__((format(X, Y, Z)))
93#endif
94
95#define DECL_BITFIELD(NAME, TYPE) typedef TYPE NAME
96
97#define DECL_BITS(TYPE, FIELD, START, SIZE) \
98 ATTRIBUTE_UNUSED static inline TYPE TYPE ## Is ## FIELD (TYPE src) { \
99 return CHECK_BITS(src, (START), (START) + (SIZE)); \
100 } \
101 ATTRIBUTE_UNUSED static inline TYPE TYPE ## Get ## FIELD (TYPE src) { \
102 return EXT_BITS(src, (START), (START) + (SIZE)); \
103 } \
104 ATTRIBUTE_UNUSED static inline TYPE TYPE ## Clear ## FIELD (TYPE src) { \
105 return CLEAR_BITS(src, (START), (START) + (SIZE)); \
106 } \
107 ATTRIBUTE_UNUSED static inline TYPE TYPE ## Fill ## FIELD (TYPE src) { \
108 return FILL_BITS(src, (START), (START) + (SIZE)); \
109 } \
110 ATTRIBUTE_UNUSED static inline TYPE TYPE ## Set ## FIELD (TYPE src, TYPE bits) { \
111 return INS_BITS(src, (START), (START) + (SIZE), bits); \
112 }
113
114#define DECL_BIT(TYPE, FIELD, BIT) DECL_BITS(TYPE, FIELD, BIT, 1)
115
116#ifndef _MSC_VER
117#define LIKELY(X) __builtin_expect(!!(X), 1)
118#define UNLIKELY(X) __builtin_expect(!!(X), 0)
119#else
120#define LIKELY(X) (!!(X))
121#define UNLIKELY(X) (!!(X))
122#endif
123
124#define ROR(I, ROTATE) ((((uint32_t) (I)) >> ROTATE) | ((uint32_t) (I) << ((-ROTATE) & 31)))
125
126#endif