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
 25#include <sys/types.h>
 26typedef intptr_t ssize_t;
 27#define inline __inline
 28#define restrict __restrict
 29#define strcasecmp _stricmp
 30#define strncasecmp _strnicmp
 31#define ftruncate _chsize
 32#define snprintf _snprintf
 33#else
 34#include <strings.h>
 35#include <unistd.h>
 36#endif
 37
 38#ifndef SSIZE_MAX
 39#define SSIZE_MAX ((ssize_t) (SIZE_MAX >> 1))
 40#endif
 41
 42#define UNUSED(V) (void)(V)
 43
 44#ifndef M_PI
 45#define M_PI 3.141592654f
 46#endif
 47
 48#if defined(__PPC__) || defined(__POWERPC__)
 49#define LOAD_32LE(DEST, ADDR, ARR) { \
 50	uint32_t _addr = (ADDR); \
 51	void* _ptr = (ARR); \
 52	__asm__("lwbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
 53}
 54
 55#define LOAD_16LE(DEST, ADDR, ARR) { \
 56	uint32_t _addr = (ADDR); \
 57	void* _ptr = (ARR); \
 58	__asm__("lhbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
 59}
 60
 61#define STORE_32LE(SRC, ADDR, ARR) { \
 62	uint32_t _addr = (ADDR); \
 63	void* _ptr = (ARR); \
 64	__asm__("stwbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr)); \
 65}
 66
 67#define STORE_16LE(SRC, ADDR, ARR) { \
 68	uint32_t _addr = (ADDR); \
 69	void* _ptr = (ARR); \
 70	__asm__("sthbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr)); \
 71}
 72#else
 73#define LOAD_32LE(DEST, ADDR, ARR) DEST = ((uint32_t*) ARR)[(ADDR) >> 2]
 74#define LOAD_16LE(DEST, ADDR, ARR) DEST = ((uint16_t*) ARR)[(ADDR) >> 1]
 75#define STORE_32LE(SRC, ADDR, ARR) ((uint32_t*) ARR)[(ADDR) >> 2] = SRC
 76#define STORE_16LE(SRC, ADDR, ARR) ((uint16_t*) ARR)[(ADDR) >> 1] = SRC
 77#endif
 78
 79#define MAKE_MASK(START, END) (((1 << ((END) - (START))) - 1) << (START))
 80#define CHECK_BITS(SRC, START, END) ((SRC) & MAKE_MASK(START, END))
 81#define EXT_BITS(SRC, START, END) (((SRC) >> (START)) & ((1 << ((END) - (START))) - 1))
 82#define INS_BITS(SRC, START, END, BITS) (CLEAR_BITS(SRC, START, END) | (((BITS) << (START)) & MAKE_MASK(START, END)))
 83#define CLEAR_BITS(SRC, START, END) ((SRC) & ~MAKE_MASK(START, END))
 84#define FILL_BITS(SRC, START, END) ((SRC) | MAKE_MASK(START, END))
 85
 86#ifdef _MSC_VER
 87#define ATTRIBUTE_UNUSED
 88#define ATTRIBUTE_FORMAT(X, Y, Z)
 89#else
 90#define ATTRIBUTE_UNUSED __attribute__((unused))
 91#define ATTRIBUTE_FORMAT(X, Y, Z) __attribute__((format(X, Y, Z)))
 92#endif
 93
 94#define DECL_BITFIELD(NAME, TYPE) typedef TYPE NAME
 95
 96#define DECL_BITS(TYPE, FIELD, START, SIZE) \
 97	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Is ## FIELD (TYPE src) { \
 98		return CHECK_BITS(src, (START), (START) + (SIZE)); \
 99	} \
100	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Get ## FIELD (TYPE src) { \
101		return EXT_BITS(src, (START), (START) + (SIZE)); \
102	} \
103	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Clear ## FIELD (TYPE src) { \
104		return CLEAR_BITS(src, (START), (START) + (SIZE)); \
105	} \
106	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Fill ## FIELD (TYPE src) { \
107		return FILL_BITS(src, (START), (START) + (SIZE)); \
108	} \
109	ATTRIBUTE_UNUSED static inline TYPE TYPE ## Set ## FIELD (TYPE src, TYPE bits) { \
110		return INS_BITS(src, (START), (START) + (SIZE), bits); \
111	}
112
113#define DECL_BIT(TYPE, FIELD, BIT) DECL_BITS(TYPE, FIELD, BIT, 1)
114
115#ifndef _MSC_VER
116#define LIKELY(X) __builtin_expect(!!(X), 1)
117#define UNLIKELY(X) __builtin_expect(!!(X), 0)
118#else
119#define LIKELY(X) (!!(X))
120#define UNLIKELY(X) (!!(X))
121#endif
122
123#define ROR(I, ROTATE) ((((uint32_t) (I)) >> ROTATE) | ((uint32_t) (I) << ((-ROTATE) & 31)))
124
125#endif