1 #ifndef GIT_COMPAT_UTIL_H 2 #define GIT_COMPAT_UTIL_H 3 4 #define _FILE_OFFSET_BITS 64 5 6 #ifndef FLEX_ARRAY 7 /* 8 * See if our compiler is known to support flexible array members. 9 */ 10 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) 11 # define FLEX_ARRAY /* empty */ 12 #elif defined(__GNUC__) 13 # if (__GNUC__ >= 3) 14 # define FLEX_ARRAY /* empty */ 15 # else 16 # define FLEX_ARRAY 0 /* older GNU extension */ 17 # endif 18 #endif 19 20 /* 21 * Otherwise, default to safer but a bit wasteful traditional style 22 */ 23 #ifndef FLEX_ARRAY 24 # define FLEX_ARRAY 1 25 #endif 26 #endif 27 28 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) 29 30 #ifdef __GNUC__ 31 #define TYPEOF(x) (__typeof__(x)) 32 #else 33 #define TYPEOF(x) 34 #endif 35 36 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits)))) 37 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ 38 39 /* Approximation of the length of the decimal representation of this type. */ 40 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) 41 42 #define _ALL_SOURCE 1 43 #define _GNU_SOURCE 1 44 #define _BSD_SOURCE 1 45 #define HAS_BOOL 46 47 #include <unistd.h> 48 #include <stdio.h> 49 #include <sys/stat.h> 50 #include <sys/statfs.h> 51 #include <fcntl.h> 52 #include <stdbool.h> 53 #include <stddef.h> 54 #include <stdlib.h> 55 #include <stdarg.h> 56 #include <string.h> 57 #include <errno.h> 58 #include <limits.h> 59 #include <sys/param.h> 60 #include <sys/types.h> 61 #include <dirent.h> 62 #include <sys/time.h> 63 #include <time.h> 64 #include <signal.h> 65 #include <fnmatch.h> 66 #include <assert.h> 67 #include <regex.h> 68 #include <utime.h> 69 #include <sys/wait.h> 70 #include <sys/poll.h> 71 #include <sys/socket.h> 72 #include <sys/ioctl.h> 73 #ifndef NO_SYS_SELECT_H 74 #include <sys/select.h> 75 #endif 76 #include <netinet/in.h> 77 #include <netinet/tcp.h> 78 #include <arpa/inet.h> 79 #include <netdb.h> 80 #include <pwd.h> 81 #include <inttypes.h> 82 #include "../../../include/linux/magic.h" 83 #include "types.h" 84 85 86 #ifndef NO_ICONV 87 #include <iconv.h> 88 #endif 89 90 extern const char *graph_line; 91 extern const char *graph_dotted_line; 92 93 /* On most systems <limits.h> would have given us this, but 94 * not on some systems (e.g. GNU/Hurd). 95 */ 96 #ifndef PATH_MAX 97 #define PATH_MAX 4096 98 #endif 99 100 #ifndef PRIuMAX 101 #define PRIuMAX "llu" 102 #endif 103 104 #ifndef PRIu32 105 #define PRIu32 "u" 106 #endif 107 108 #ifndef PRIx32 109 #define PRIx32 "x" 110 #endif 111 112 #ifndef PATH_SEP 113 #define PATH_SEP ':' 114 #endif 115 116 #ifndef STRIP_EXTENSION 117 #define STRIP_EXTENSION "" 118 #endif 119 120 #ifndef has_dos_drive_prefix 121 #define has_dos_drive_prefix(path) 0 122 #endif 123 124 #ifndef is_dir_sep 125 #define is_dir_sep(c) ((c) == '/') 126 #endif 127 128 #ifdef __GNUC__ 129 #define NORETURN __attribute__((__noreturn__)) 130 #else 131 #define NORETURN 132 #ifndef __attribute__ 133 #define __attribute__(x) 134 #endif 135 #endif 136 137 /* General helper functions */ 138 extern void usage(const char *err) NORETURN; 139 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); 140 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); 141 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); 142 143 #include "../../../include/linux/stringify.h" 144 145 #define DIE_IF(cnd) \ 146 do { if (cnd) \ 147 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \ 148 __stringify(cnd) "\n"); \ 149 } while (0) 150 151 152 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); 153 154 extern int prefixcmp(const char *str, const char *prefix); 155 extern time_t tm_to_time_t(const struct tm *tm); 156 157 static inline const char *skip_prefix(const char *str, const char *prefix) 158 { 159 size_t len = strlen(prefix); 160 return strncmp(str, prefix, len) ? NULL : str + len; 161 } 162 163 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) 164 165 #ifndef PROT_READ 166 #define PROT_READ 1 167 #define PROT_WRITE 2 168 #define MAP_PRIVATE 1 169 #define MAP_FAILED ((void*)-1) 170 #endif 171 172 #define mmap git_mmap 173 #define munmap git_munmap 174 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); 175 extern int git_munmap(void *start, size_t length); 176 177 #else /* NO_MMAP || USE_WIN32_MMAP */ 178 179 #include <sys/mman.h> 180 181 #endif /* NO_MMAP || USE_WIN32_MMAP */ 182 183 #ifdef NO_MMAP 184 185 /* This value must be multiple of (pagesize * 2) */ 186 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) 187 188 #else /* NO_MMAP */ 189 190 /* This value must be multiple of (pagesize * 2) */ 191 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ 192 (sizeof(void*) >= 8 \ 193 ? 1 * 1024 * 1024 * 1024 \ 194 : 32 * 1024 * 1024) 195 196 #endif /* NO_MMAP */ 197 198 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT 199 #define on_disk_bytes(st) ((st).st_size) 200 #else 201 #define on_disk_bytes(st) ((st).st_blocks * 512) 202 #endif 203 204 #define DEFAULT_PACKED_GIT_LIMIT \ 205 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) 206 207 #ifdef NO_PREAD 208 #define pread git_pread 209 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); 210 #endif 211 /* 212 * Forward decl that will remind us if its twin in cache.h changes. 213 * This function is used in compat/pread.c. But we can't include 214 * cache.h there. 215 */ 216 extern ssize_t read_in_full(int fd, void *buf, size_t count); 217 218 #ifdef NO_SETENV 219 #define setenv gitsetenv 220 extern int gitsetenv(const char *, const char *, int); 221 #endif 222 223 #ifdef NO_MKDTEMP 224 #define mkdtemp gitmkdtemp 225 extern char *gitmkdtemp(char *); 226 #endif 227 228 #ifdef NO_UNSETENV 229 #define unsetenv gitunsetenv 230 extern void gitunsetenv(const char *); 231 #endif 232 233 #ifdef NO_STRCASESTR 234 #define strcasestr gitstrcasestr 235 extern char *gitstrcasestr(const char *haystack, const char *needle); 236 #endif 237 238 #ifdef NO_STRLCPY 239 #define strlcpy gitstrlcpy 240 extern size_t gitstrlcpy(char *, const char *, size_t); 241 #endif 242 243 #ifdef NO_STRTOUMAX 244 #define strtoumax gitstrtoumax 245 extern uintmax_t gitstrtoumax(const char *, char **, int); 246 #endif 247 248 #ifdef NO_HSTRERROR 249 #define hstrerror githstrerror 250 extern const char *githstrerror(int herror); 251 #endif 252 253 #ifdef NO_MEMMEM 254 #define memmem gitmemmem 255 void *gitmemmem(const void *haystack, size_t haystacklen, 256 const void *needle, size_t needlelen); 257 #endif 258 259 #ifdef FREAD_READS_DIRECTORIES 260 #ifdef fopen 261 #undef fopen 262 #endif 263 #define fopen(a,b) git_fopen(a,b) 264 extern FILE *git_fopen(const char*, const char*); 265 #endif 266 267 #ifdef SNPRINTF_RETURNS_BOGUS 268 #define snprintf git_snprintf 269 extern int git_snprintf(char *str, size_t maxsize, 270 const char *format, ...); 271 #define vsnprintf git_vsnprintf 272 extern int git_vsnprintf(char *str, size_t maxsize, 273 const char *format, va_list ap); 274 #endif 275 276 #ifdef __GLIBC_PREREQ 277 #if __GLIBC_PREREQ(2, 1) 278 #define HAVE_STRCHRNUL 279 #endif 280 #endif 281 282 #ifndef HAVE_STRCHRNUL 283 #define strchrnul gitstrchrnul 284 static inline char *gitstrchrnul(const char *s, int c) 285 { 286 while (*s && *s != c) 287 s++; 288 return (char *)s; 289 } 290 #endif 291 292 /* 293 * Wrappers: 294 */ 295 extern char *xstrdup(const char *str); 296 extern void *xmalloc(size_t size) __attribute__((weak)); 297 extern void *xmemdupz(const void *data, size_t len); 298 extern char *xstrndup(const char *str, size_t len); 299 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak)); 300 301 static inline void *xzalloc(size_t size) 302 { 303 void *buf = xmalloc(size); 304 305 return memset(buf, 0, size); 306 } 307 308 static inline void *zalloc(size_t size) 309 { 310 return calloc(1, size); 311 } 312 313 static inline size_t xsize_t(off_t len) 314 { 315 return (size_t)len; 316 } 317 318 static inline int has_extension(const char *filename, const char *ext) 319 { 320 size_t len = strlen(filename); 321 size_t extlen = strlen(ext); 322 323 return len > extlen && !memcmp(filename + len - extlen, ext, extlen); 324 } 325 326 /* Sane ctype - no locale, and works with signed chars */ 327 #undef isascii 328 #undef isspace 329 #undef isdigit 330 #undef isxdigit 331 #undef isalpha 332 #undef isprint 333 #undef isalnum 334 #undef tolower 335 #undef toupper 336 337 extern unsigned char sane_ctype[256]; 338 #define GIT_SPACE 0x01 339 #define GIT_DIGIT 0x02 340 #define GIT_ALPHA 0x04 341 #define GIT_GLOB_SPECIAL 0x08 342 #define GIT_REGEX_SPECIAL 0x10 343 #define GIT_PRINT_EXTRA 0x20 344 #define GIT_PRINT 0x3E 345 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) 346 #define isascii(x) (((x) & ~0x7f) == 0) 347 #define isspace(x) sane_istest(x,GIT_SPACE) 348 #define isdigit(x) sane_istest(x,GIT_DIGIT) 349 #define isxdigit(x) \ 350 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G') 351 #define isalpha(x) sane_istest(x,GIT_ALPHA) 352 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) 353 #define isprint(x) sane_istest(x,GIT_PRINT) 354 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) 355 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) 356 #define tolower(x) sane_case((unsigned char)(x), 0x20) 357 #define toupper(x) sane_case((unsigned char)(x), 0) 358 359 static inline int sane_case(int x, int high) 360 { 361 if (sane_istest(x, GIT_ALPHA)) 362 x = (x & ~0x20) | high; 363 return x; 364 } 365 366 static inline int strtoul_ui(char const *s, int base, unsigned int *result) 367 { 368 unsigned long ul; 369 char *p; 370 371 errno = 0; 372 ul = strtoul(s, &p, base); 373 if (errno || *p || p == s || (unsigned int) ul != ul) 374 return -1; 375 *result = ul; 376 return 0; 377 } 378 379 static inline int strtol_i(char const *s, int base, int *result) 380 { 381 long ul; 382 char *p; 383 384 errno = 0; 385 ul = strtol(s, &p, base); 386 if (errno || *p || p == s || (int) ul != ul) 387 return -1; 388 *result = ul; 389 return 0; 390 } 391 392 #ifdef INTERNAL_QSORT 393 void git_qsort(void *base, size_t nmemb, size_t size, 394 int(*compar)(const void *, const void *)); 395 #define qsort git_qsort 396 #endif 397 398 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS 399 # define FORCE_DIR_SET_GID S_ISGID 400 #else 401 # define FORCE_DIR_SET_GID 0 402 #endif 403 404 #ifdef NO_NSEC 405 #undef USE_NSEC 406 #define ST_CTIME_NSEC(st) 0 407 #define ST_MTIME_NSEC(st) 0 408 #else 409 #ifdef USE_ST_TIMESPEC 410 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) 411 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) 412 #else 413 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) 414 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) 415 #endif 416 #endif 417 418 int mkdir_p(char *path, mode_t mode); 419 int copyfile(const char *from, const char *to); 420 421 s64 perf_atoll(const char *str); 422 char **argv_split(const char *str, int *argcp); 423 void argv_free(char **argv); 424 bool strglobmatch(const char *str, const char *pat); 425 bool strlazymatch(const char *str, const char *pat); 426 unsigned long convert_unit(unsigned long value, char *unit); 427 428 #define _STR(x) #x 429 #define STR(x) _STR(x) 430 431 #endif 432