|
| 1 | +/* |
| 2 | + * C utilities |
| 3 | + * |
| 4 | + * Copyright (c) 2017 Fabrice Bellard |
| 5 | + * Copyright (c) 2018 Charlie Gordon |
| 6 | + * |
| 7 | + * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | + * of this software and associated documentation files (the "Software"), to deal |
| 9 | + * in the Software without restriction, including without limitation the rights |
| 10 | + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | + * copies of the Software, and to permit persons to whom the Software is |
| 12 | + * furnished to do so, subject to the following conditions: |
| 13 | + * |
| 14 | + * The above copyright notice and this permission notice shall be included in |
| 15 | + * all copies or substantial portions of the Software. |
| 16 | + * |
| 17 | + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | + * THE SOFTWARE. |
| 24 | + */ |
| 25 | +#ifndef CUTILS_H |
| 26 | +#define CUTILS_H |
| 27 | + |
| 28 | +#include <stdlib.h> |
| 29 | +#include <inttypes.h> |
| 30 | + |
| 31 | +/* set if CPU is big endian */ |
| 32 | +#undef WORDS_BIGENDIAN |
| 33 | + |
| 34 | +#define likely(x) __builtin_expect(!!(x), 1) |
| 35 | +#define unlikely(x) __builtin_expect(!!(x), 0) |
| 36 | +#define force_inline inline __attribute__((always_inline)) |
| 37 | +#define no_inline __attribute__((noinline)) |
| 38 | +#define __maybe_unused __attribute__((unused)) |
| 39 | + |
| 40 | +#define xglue(x, y) x ## y |
| 41 | +#define glue(x, y) xglue(x, y) |
| 42 | +#define stringify(s) tostring(s) |
| 43 | +#define tostring(s) #s |
| 44 | + |
| 45 | +#ifndef offsetof |
| 46 | +#define offsetof(type, field) ((size_t) &((type *)0)->field) |
| 47 | +#endif |
| 48 | +#ifndef countof |
| 49 | +#define countof(x) (sizeof(x) / sizeof((x)[0])) |
| 50 | +#endif |
| 51 | + |
| 52 | +typedef int BOOL; |
| 53 | + |
| 54 | +#ifndef FALSE |
| 55 | +enum { |
| 56 | + FALSE = 0, |
| 57 | + TRUE = 1, |
| 58 | +}; |
| 59 | +#endif |
| 60 | + |
| 61 | +void pstrcpy(char *buf, int buf_size, const char *str); |
| 62 | +char *pstrcat(char *buf, int buf_size, const char *s); |
| 63 | +int strstart(const char *str, const char *val, const char **ptr); |
| 64 | +int has_suffix(const char *str, const char *suffix); |
| 65 | + |
| 66 | +static inline int max_int(int a, int b) |
| 67 | +{ |
| 68 | + if (a > b) |
| 69 | + return a; |
| 70 | + else |
| 71 | + return b; |
| 72 | +} |
| 73 | + |
| 74 | +static inline int min_int(int a, int b) |
| 75 | +{ |
| 76 | + if (a < b) |
| 77 | + return a; |
| 78 | + else |
| 79 | + return b; |
| 80 | +} |
| 81 | + |
| 82 | +static inline uint32_t max_uint32(uint32_t a, uint32_t b) |
| 83 | +{ |
| 84 | + if (a > b) |
| 85 | + return a; |
| 86 | + else |
| 87 | + return b; |
| 88 | +} |
| 89 | + |
| 90 | +static inline uint32_t min_uint32(uint32_t a, uint32_t b) |
| 91 | +{ |
| 92 | + if (a < b) |
| 93 | + return a; |
| 94 | + else |
| 95 | + return b; |
| 96 | +} |
| 97 | + |
| 98 | +static inline int64_t max_int64(int64_t a, int64_t b) |
| 99 | +{ |
| 100 | + if (a > b) |
| 101 | + return a; |
| 102 | + else |
| 103 | + return b; |
| 104 | +} |
| 105 | + |
| 106 | +static inline int64_t min_int64(int64_t a, int64_t b) |
| 107 | +{ |
| 108 | + if (a < b) |
| 109 | + return a; |
| 110 | + else |
| 111 | + return b; |
| 112 | +} |
| 113 | + |
| 114 | +/* WARNING: undefined if a = 0 */ |
| 115 | +static inline int clz32(unsigned int a) |
| 116 | +{ |
| 117 | + return __builtin_clz(a); |
| 118 | +} |
| 119 | + |
| 120 | +/* WARNING: undefined if a = 0 */ |
| 121 | +static inline int clz64(uint64_t a) |
| 122 | +{ |
| 123 | + return __builtin_clzll(a); |
| 124 | +} |
| 125 | + |
| 126 | +/* WARNING: undefined if a = 0 */ |
| 127 | +static inline int ctz32(unsigned int a) |
| 128 | +{ |
| 129 | + return __builtin_ctz(a); |
| 130 | +} |
| 131 | + |
| 132 | +/* WARNING: undefined if a = 0 */ |
| 133 | +static inline int ctz64(uint64_t a) |
| 134 | +{ |
| 135 | + return __builtin_ctzll(a); |
| 136 | +} |
| 137 | + |
| 138 | +struct __attribute__((packed)) packed_u64 { |
| 139 | + uint64_t v; |
| 140 | +}; |
| 141 | + |
| 142 | +struct __attribute__((packed)) packed_u32 { |
| 143 | + uint32_t v; |
| 144 | +}; |
| 145 | + |
| 146 | +struct __attribute__((packed)) packed_u16 { |
| 147 | + uint16_t v; |
| 148 | +}; |
| 149 | + |
| 150 | +static inline uint64_t get_u64(const uint8_t *tab) |
| 151 | +{ |
| 152 | + return ((const struct packed_u64 *)tab)->v; |
| 153 | +} |
| 154 | + |
| 155 | +static inline int64_t get_i64(const uint8_t *tab) |
| 156 | +{ |
| 157 | + return (int64_t)((const struct packed_u64 *)tab)->v; |
| 158 | +} |
| 159 | + |
| 160 | +static inline void put_u64(uint8_t *tab, uint64_t val) |
| 161 | +{ |
| 162 | + ((struct packed_u64 *)tab)->v = val; |
| 163 | +} |
| 164 | + |
| 165 | +static inline uint32_t get_u32(const uint8_t *tab) |
| 166 | +{ |
| 167 | + return ((const struct packed_u32 *)tab)->v; |
| 168 | +} |
| 169 | + |
| 170 | +static inline int32_t get_i32(const uint8_t *tab) |
| 171 | +{ |
| 172 | + return (int32_t)((const struct packed_u32 *)tab)->v; |
| 173 | +} |
| 174 | + |
| 175 | +static inline void put_u32(uint8_t *tab, uint32_t val) |
| 176 | +{ |
| 177 | + ((struct packed_u32 *)tab)->v = val; |
| 178 | +} |
| 179 | + |
| 180 | +static inline uint32_t get_u16(const uint8_t *tab) |
| 181 | +{ |
| 182 | + return ((const struct packed_u16 *)tab)->v; |
| 183 | +} |
| 184 | + |
| 185 | +static inline int32_t get_i16(const uint8_t *tab) |
| 186 | +{ |
| 187 | + return (int16_t)((const struct packed_u16 *)tab)->v; |
| 188 | +} |
| 189 | + |
| 190 | +static inline void put_u16(uint8_t *tab, uint16_t val) |
| 191 | +{ |
| 192 | + ((struct packed_u16 *)tab)->v = val; |
| 193 | +} |
| 194 | + |
| 195 | +static inline uint32_t get_u8(const uint8_t *tab) |
| 196 | +{ |
| 197 | + return *tab; |
| 198 | +} |
| 199 | + |
| 200 | +static inline int32_t get_i8(const uint8_t *tab) |
| 201 | +{ |
| 202 | + return (int8_t)*tab; |
| 203 | +} |
| 204 | + |
| 205 | +static inline void put_u8(uint8_t *tab, uint8_t val) |
| 206 | +{ |
| 207 | + *tab = val; |
| 208 | +} |
| 209 | + |
| 210 | +static inline uint16_t bswap16(uint16_t x) |
| 211 | +{ |
| 212 | + return (x >> 8) | (x << 8); |
| 213 | +} |
| 214 | + |
| 215 | +static inline uint32_t bswap32(uint32_t v) |
| 216 | +{ |
| 217 | + return ((v & 0xff000000) >> 24) | ((v & 0x00ff0000) >> 8) | |
| 218 | + ((v & 0x0000ff00) << 8) | ((v & 0x000000ff) << 24); |
| 219 | +} |
| 220 | + |
| 221 | +static inline uint64_t bswap64(uint64_t v) |
| 222 | +{ |
| 223 | + return ((v & ((uint64_t)0xff << (7 * 8))) >> (7 * 8)) | |
| 224 | + ((v & ((uint64_t)0xff << (6 * 8))) >> (5 * 8)) | |
| 225 | + ((v & ((uint64_t)0xff << (5 * 8))) >> (3 * 8)) | |
| 226 | + ((v & ((uint64_t)0xff << (4 * 8))) >> (1 * 8)) | |
| 227 | + ((v & ((uint64_t)0xff << (3 * 8))) << (1 * 8)) | |
| 228 | + ((v & ((uint64_t)0xff << (2 * 8))) << (3 * 8)) | |
| 229 | + ((v & ((uint64_t)0xff << (1 * 8))) << (5 * 8)) | |
| 230 | + ((v & ((uint64_t)0xff << (0 * 8))) << (7 * 8)); |
| 231 | +} |
| 232 | + |
| 233 | +/* XXX: should take an extra argument to pass slack information to the caller */ |
| 234 | +typedef void *DynBufReallocFunc(void *opaque, void *ptr, size_t size); |
| 235 | + |
| 236 | +typedef struct DynBuf { |
| 237 | + uint8_t *buf; |
| 238 | + size_t size; |
| 239 | + size_t allocated_size; |
| 240 | + BOOL error; /* true if a memory allocation error occurred */ |
| 241 | + DynBufReallocFunc *realloc_func; |
| 242 | + void *opaque; /* for realloc_func */ |
| 243 | +} DynBuf; |
| 244 | + |
| 245 | +void dbuf_init(DynBuf *s); |
| 246 | +void dbuf_init2(DynBuf *s, void *opaque, DynBufReallocFunc *realloc_func); |
| 247 | +int dbuf_realloc(DynBuf *s, size_t new_size); |
| 248 | +int dbuf_write(DynBuf *s, size_t offset, const uint8_t *data, size_t len); |
| 249 | +int dbuf_put(DynBuf *s, const uint8_t *data, size_t len); |
| 250 | +int dbuf_put_self(DynBuf *s, size_t offset, size_t len); |
| 251 | +int dbuf_putc(DynBuf *s, uint8_t c); |
| 252 | +int dbuf_putstr(DynBuf *s, const char *str); |
| 253 | +static inline int dbuf_put_u16(DynBuf *s, uint16_t val) |
| 254 | +{ |
| 255 | + return dbuf_put(s, (uint8_t *)&val, 2); |
| 256 | +} |
| 257 | +static inline int dbuf_put_u32(DynBuf *s, uint32_t val) |
| 258 | +{ |
| 259 | + return dbuf_put(s, (uint8_t *)&val, 4); |
| 260 | +} |
| 261 | +static inline int dbuf_put_u64(DynBuf *s, uint64_t val) |
| 262 | +{ |
| 263 | + return dbuf_put(s, (uint8_t *)&val, 8); |
| 264 | +} |
| 265 | +int __attribute__((format(printf, 2, 3))) dbuf_printf(DynBuf *s, |
| 266 | + const char *fmt, ...); |
| 267 | +void dbuf_free(DynBuf *s); |
| 268 | +static inline BOOL dbuf_error(DynBuf *s) { |
| 269 | + return s->error; |
| 270 | +} |
| 271 | + |
| 272 | +#define UTF8_CHAR_LEN_MAX 6 |
| 273 | + |
| 274 | +int unicode_to_utf8(uint8_t *buf, unsigned int c); |
| 275 | +int unicode_from_utf8(const uint8_t *p, int max_len, const uint8_t **pp); |
| 276 | + |
| 277 | +static inline int from_hex(int c) |
| 278 | +{ |
| 279 | + if (c >= '0' && c <= '9') |
| 280 | + return c - '0'; |
| 281 | + else if (c >= 'A' && c <= 'F') |
| 282 | + return c - 'A' + 10; |
| 283 | + else if (c >= 'a' && c <= 'f') |
| 284 | + return c - 'a' + 10; |
| 285 | + else |
| 286 | + return -1; |
| 287 | +} |
| 288 | + |
| 289 | +void rqsort(void *base, size_t nmemb, size_t size, |
| 290 | + int (*cmp)(const void *, const void *, void *), |
| 291 | + void *arg); |
| 292 | + |
| 293 | +#endif /* CUTILS_H */ |
0 commit comments