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#ifdef _WIN32
 23// WinSock2 gets very angry if it's included too late
 24#include <winsock2.h>
 25#endif
 26#ifdef _MSC_VER
 27#include <Windows.h>
 28#include <sys/types.h>
 29typedef intptr_t ssize_t;
 30#define PATH_MAX MAX_PATH
 31#define restrict __restrict
 32#define strcasecmp _stricmp
 33#define strncasecmp _strnicmp
 34#define ftruncate _chsize
 35#define snprintf _snprintf
 36#define strdup _strdup
 37#define lseek _lseek
 38#elif defined(__wii__)
 39typedef intptr_t ssize_t;
 40#else
 41#include <strings.h>
 42#include <unistd.h>
 43#endif
 44
 45#ifndef SSIZE_MAX
 46#define SSIZE_MAX ((ssize_t) (SIZE_MAX >> 1))
 47#endif
 48
 49#define UNUSED(V) (void)(V)
 50
 51#ifndef M_PI
 52#define M_PI 3.141592654f
 53#endif
 54
 55#if defined(__PPC__) || defined(__POWERPC__)
 56#define LOAD_32LE(DEST, ADDR, ARR) { \
 57	uint32_t _addr = (ADDR); \
 58	const void* _ptr = (ARR); \
 59	__asm__("lwbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
 60}
 61
 62#define LOAD_16LE(DEST, ADDR, ARR) { \
 63	uint32_t _addr = (ADDR); \
 64	const void* _ptr = (ARR); \
 65	__asm__("lhbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
 66}
 67
 68#define STORE_32LE(SRC, ADDR, ARR) { \
 69	uint32_t _addr = (ADDR); \
 70	void* _ptr = (ARR); \
 71	__asm__("stwbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr)); \
 72}
 73
 74#define STORE_16LE(SRC, ADDR, ARR) { \
 75	uint32_t _addr = (ADDR); \
 76	void* _ptr = (ARR); \
 77	__asm__("sthbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr)); \
 78}
 79
 80#define LOAD_64LE(DEST, ADDR, ARR) DEST = __builtin_bswap64(((uint64_t*) ARR)[(ADDR) >> 3])
 81#define STORE_64LE(SRC, ADDR, ARR) ((uint64_t*) ARR)[(ADDR) >> 3] = __builtin_bswap64(SRC)
 82#elif defined __BIG_ENDIAN__
 83#if defined(__llvm__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
 84#define LOAD_64LE(DEST, ADDR, ARR) DEST = __builtin_bswap64(((uint64_t*) ARR)[(ADDR) >> 3])
 85#define LOAD_32LE(DEST, ADDR, ARR) DEST = __builtin_bswap32(((uint32_t*) ARR)[(ADDR) >> 2])
 86#define LOAD_16LE(DEST, ADDR, ARR) DEST = __builtin_bswap16(((uint16_t*) ARR)[(ADDR) >> 1])
 87#define STORE_64LE(SRC, ADDR, ARR) ((uint64_t*) ARR)[(ADDR) >> 3] = __builtin_bswap64(SRC)
 88#define STORE_32LE(SRC, ADDR, ARR) ((uint32_t*) ARR)[(ADDR) >> 2] = __builtin_bswap32(SRC)
 89#define STORE_16LE(SRC, ADDR, ARR) ((uint16_t*) ARR)[(ADDR) >> 1] = __builtin_bswap16(SRC)
 90#else
 91#error Big endian build not supported on this platform.
 92#endif
 93#else
 94#define LOAD_64LE(DEST, ADDR, ARR) DEST = *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
 95#define LOAD_32LE(DEST, ADDR, ARR) DEST = *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
 96#define LOAD_16LE(DEST, ADDR, ARR) DEST = *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
 97#define STORE_64LE(SRC, ADDR, ARR) *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
 98#define STORE_32LE(SRC, ADDR, ARR) *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
 99#define STORE_16LE(SRC, ADDR, ARR) *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
100#endif
101
102#define MAKE_MASK(START, END) (((1 << ((END) - (START))) - 1) << (START))
103#define CHECK_BITS(SRC, START, END) ((SRC) & MAKE_MASK(START, END))
104#define EXT_BITS(SRC, START, END) (((SRC) >> (START)) & ((1 << ((END) - (START))) - 1))
105#define INS_BITS(SRC, START, END, BITS) (CLEAR_BITS(SRC, START, END) | (((BITS) << (START)) & MAKE_MASK(START, END)))
106#define CLEAR_BITS(SRC, START, END) ((SRC) & ~MAKE_MASK(START, END))
107#define FILL_BITS(SRC, START, END) ((SRC) | MAKE_MASK(START, END))
108#define TEST_FILL_BITS(SRC, START, END, TEST) ((TEST) ? (FILL_BITS(SRC, START, END)) : (CLEAR_BITS(SRC, START, END)))
109
110#ifdef _MSC_VER
111#define ATTRIBUTE_UNUSED
112#define ATTRIBUTE_FORMAT(X, Y, Z)
113#else
114#define ATTRIBUTE_UNUSED __attribute__((unused))
115#define ATTRIBUTE_FORMAT(X, Y, Z) __attribute__((format(X, Y, Z)))
116#endif
117
118#define DECL_BITFIELD(NAME, TYPE) typedef TYPE NAME
119
120#define DECL_BITS(TYPE, FIELD, START, SIZE) \
121	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Is ## FIELD (TYPE src) { \
122		return CHECK_BITS(src, (START), (START) + (SIZE)); \
123	} \
124	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Get ## FIELD (TYPE src) { \
125		return EXT_BITS(src, (START), (START) + (SIZE)); \
126	} \
127	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Clear ## FIELD (TYPE src) { \
128		return CLEAR_BITS(src, (START), (START) + (SIZE)); \
129	} \
130	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Fill ## FIELD (TYPE src) { \
131		return FILL_BITS(src, (START), (START) + (SIZE)); \
132	} \
133	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Set ## FIELD (TYPE src, TYPE bits) { \
134		return INS_BITS(src, (START), (START) + (SIZE), bits); \
135	} \
136	ATTRIBUTE_UNUSED static inline TYPE TYPE ## TestFill ## FIELD (TYPE src, bool test) { \
137		return TEST_FILL_BITS(src, (START), (START) + (SIZE), test); \
138	}
139
140#define DECL_BIT(TYPE, FIELD, BIT) DECL_BITS(TYPE, FIELD, BIT, 1)
141
142#ifndef _MSC_VER
143#define LIKELY(X) __builtin_expect(!!(X), 1)
144#define UNLIKELY(X) __builtin_expect(!!(X), 0)
145#else
146#define LIKELY(X) (!!(X))
147#define UNLIKELY(X) (!!(X))
148#endif
149
150#define ROR(I, ROTATE) ((((uint32_t) (I)) >> ROTATE) | ((uint32_t) (I) << ((-ROTATE) & 31)))
151
152#endif