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 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX) 43 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ 44 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ 45 #endif 46 #define _ALL_SOURCE 1 47 #define _GNU_SOURCE 1 48 #define _BSD_SOURCE 1 49 50 #include <unistd.h> 51 #include <stdio.h> 52 #include <sys/stat.h> 53 #include <fcntl.h> 54 #include <stddef.h> 55 #include <stdlib.h> 56 #include <stdarg.h> 57 #include <string.h> 58 #include <errno.h> 59 #include <limits.h> 60 #include <sys/param.h> 61 #include <sys/types.h> 62 #include <dirent.h> 63 #include <sys/time.h> 64 #include <time.h> 65 #include <signal.h> 66 #include <fnmatch.h> 67 #include <assert.h> 68 #include <regex.h> 69 #include <utime.h> 70 #ifndef __MINGW32__ 71 #include <sys/wait.h> 72 #include <sys/poll.h> 73 #include <sys/socket.h> 74 #include <sys/ioctl.h> 75 #ifndef NO_SYS_SELECT_H 76 #include <sys/select.h> 77 #endif 78 #include <netinet/in.h> 79 #include <netinet/tcp.h> 80 #include <arpa/inet.h> 81 #include <netdb.h> 82 #include <pwd.h> 83 #include <inttypes.h> 84 #if defined(__CYGWIN__) 85 #undef _XOPEN_SOURCE 86 #include <grp.h> 87 #define _XOPEN_SOURCE 600 88 #include "compat/cygwin.h" 89 #else 90 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ 91 #include <grp.h> 92 #define _ALL_SOURCE 1 93 #endif 94 #else /* __MINGW32__ */ 95 /* pull in Windows compatibility stuff */ 96 #include "compat/mingw.h" 97 #endif /* __MINGW32__ */ 98 99 #ifndef NO_ICONV 100 #include <iconv.h> 101 #endif 102 103 /* On most systems <limits.h> would have given us this, but 104 * not on some systems (e.g. GNU/Hurd). 105 */ 106 #ifndef PATH_MAX 107 #define PATH_MAX 4096 108 #endif 109 110 #ifndef PRIuMAX 111 #define PRIuMAX "llu" 112 #endif 113 114 #ifndef PRIu32 115 #define PRIu32 "u" 116 #endif 117 118 #ifndef PRIx32 119 #define PRIx32 "x" 120 #endif 121 122 #ifndef PATH_SEP 123 #define PATH_SEP ':' 124 #endif 125 126 #ifndef STRIP_EXTENSION 127 #define STRIP_EXTENSION "" 128 #endif 129 130 #ifndef has_dos_drive_prefix 131 #define has_dos_drive_prefix(path) 0 132 #endif 133 134 #ifndef is_dir_sep 135 #define is_dir_sep(c) ((c) == '/') 136 #endif 137 138 #ifdef __GNUC__ 139 #define NORETURN __attribute__((__noreturn__)) 140 #else 141 #define NORETURN 142 #ifndef __attribute__ 143 #define __attribute__(x) 144 #endif 145 #endif 146 147 /* General helper functions */ 148 extern void usage(const char *err) NORETURN; 149 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); 150 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); 151 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); 152 153 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); 154 155 extern int prefixcmp(const char *str, const char *prefix); 156 extern time_t tm_to_time_t(const struct tm *tm); 157 158 static inline const char *skip_prefix(const char *str, const char *prefix) 159 { 160 size_t len = strlen(prefix); 161 return strncmp(str, prefix, len) ? NULL : str + len; 162 } 163 164 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) 165 166 #ifndef PROT_READ 167 #define PROT_READ 1 168 #define PROT_WRITE 2 169 #define MAP_PRIVATE 1 170 #define MAP_FAILED ((void*)-1) 171 #endif 172 173 #define mmap git_mmap 174 #define munmap git_munmap 175 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); 176 extern int git_munmap(void *start, size_t length); 177 178 #else /* NO_MMAP || USE_WIN32_MMAP */ 179 180 #include <sys/mman.h> 181 182 #endif /* NO_MMAP || USE_WIN32_MMAP */ 183 184 #ifdef NO_MMAP 185 186 /* This value must be multiple of (pagesize * 2) */ 187 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) 188 189 #else /* NO_MMAP */ 190 191 /* This value must be multiple of (pagesize * 2) */ 192 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ 193 (sizeof(void*) >= 8 \ 194 ? 1 * 1024 * 1024 * 1024 \ 195 : 32 * 1024 * 1024) 196 197 #endif /* NO_MMAP */ 198 199 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT 200 #define on_disk_bytes(st) ((st).st_size) 201 #else 202 #define on_disk_bytes(st) ((st).st_blocks * 512) 203 #endif 204 205 #define DEFAULT_PACKED_GIT_LIMIT \ 206 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) 207 208 #ifdef NO_PREAD 209 #define pread git_pread 210 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); 211 #endif 212 /* 213 * Forward decl that will remind us if its twin in cache.h changes. 214 * This function is used in compat/pread.c. But we can't include 215 * cache.h there. 216 */ 217 extern ssize_t read_in_full(int fd, void *buf, size_t count); 218 219 #ifdef NO_SETENV 220 #define setenv gitsetenv 221 extern int gitsetenv(const char *, const char *, int); 222 #endif 223 224 #ifdef NO_MKDTEMP 225 #define mkdtemp gitmkdtemp 226 extern char *gitmkdtemp(char *); 227 #endif 228 229 #ifdef NO_UNSETENV 230 #define unsetenv gitunsetenv 231 extern void gitunsetenv(const char *); 232 #endif 233 234 #ifdef NO_STRCASESTR 235 #define strcasestr gitstrcasestr 236 extern char *gitstrcasestr(const char *haystack, const char *needle); 237 #endif 238 239 #ifdef NO_STRLCPY 240 #define strlcpy gitstrlcpy 241 extern size_t gitstrlcpy(char *, const char *, size_t); 242 #endif 243 244 #ifdef NO_STRTOUMAX 245 #define strtoumax gitstrtoumax 246 extern uintmax_t gitstrtoumax(const char *, char **, int); 247 #endif 248 249 #ifdef NO_HSTRERROR 250 #define hstrerror githstrerror 251 extern const char *githstrerror(int herror); 252 #endif 253 254 #ifdef NO_MEMMEM 255 #define memmem gitmemmem 256 void *gitmemmem(const void *haystack, size_t haystacklen, 257 const void *needle, size_t needlelen); 258 #endif 259 260 #ifdef FREAD_READS_DIRECTORIES 261 #ifdef fopen 262 #undef fopen 263 #endif 264 #define fopen(a,b) git_fopen(a,b) 265 extern FILE *git_fopen(const char*, const char*); 266 #endif 267 268 #ifdef SNPRINTF_RETURNS_BOGUS 269 #define snprintf git_snprintf 270 extern int git_snprintf(char *str, size_t maxsize, 271 const char *format, ...); 272 #define vsnprintf git_vsnprintf 273 extern int git_vsnprintf(char *str, size_t maxsize, 274 const char *format, va_list ap); 275 #endif 276 277 #ifdef __GLIBC_PREREQ 278 #if __GLIBC_PREREQ(2, 1) 279 #define HAVE_STRCHRNUL 280 #endif 281 #endif 282 283 #ifndef HAVE_STRCHRNUL 284 #define strchrnul gitstrchrnul 285 static inline char *gitstrchrnul(const char *s, int c) 286 { 287 while (*s && *s != c) 288 s++; 289 return (char *)s; 290 } 291 #endif 292 293 /* 294 * Wrappers: 295 */ 296 extern char *xstrdup(const char *str); 297 extern void *xmalloc(size_t size); 298 extern void *xmemdupz(const void *data, size_t len); 299 extern char *xstrndup(const char *str, size_t len); 300 extern void *xrealloc(void *ptr, size_t size); 301 extern void *xcalloc(size_t nmemb, size_t size); 302 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); 303 extern ssize_t xread(int fd, void *buf, size_t len); 304 extern ssize_t xwrite(int fd, const void *buf, size_t len); 305 extern int xdup(int fd); 306 extern FILE *xfdopen(int fd, const char *mode); 307 extern int xmkstemp(char *template); 308 309 static inline size_t xsize_t(off_t len) 310 { 311 return (size_t)len; 312 } 313 314 static inline int has_extension(const char *filename, const char *ext) 315 { 316 size_t len = strlen(filename); 317 size_t extlen = strlen(ext); 318 return len > extlen && !memcmp(filename + len - extlen, ext, extlen); 319 } 320 321 /* Sane ctype - no locale, and works with signed chars */ 322 #undef isascii 323 #undef isspace 324 #undef isdigit 325 #undef isalpha 326 #undef isalnum 327 #undef tolower 328 #undef toupper 329 extern unsigned char sane_ctype[256]; 330 #define GIT_SPACE 0x01 331 #define GIT_DIGIT 0x02 332 #define GIT_ALPHA 0x04 333 #define GIT_GLOB_SPECIAL 0x08 334 #define GIT_REGEX_SPECIAL 0x10 335 #define GIT_PRINT_EXTRA 0x20 336 #define GIT_PRINT 0x3E 337 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) 338 #define isascii(x) (((x) & ~0x7f) == 0) 339 #define isspace(x) sane_istest(x,GIT_SPACE) 340 #define isdigit(x) sane_istest(x,GIT_DIGIT) 341 #define isalpha(x) sane_istest(x,GIT_ALPHA) 342 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) 343 #define isprint(x) sane_istest(x,GIT_PRINT) 344 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) 345 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) 346 #define tolower(x) sane_case((unsigned char)(x), 0x20) 347 #define toupper(x) sane_case((unsigned char)(x), 0) 348 349 static inline int sane_case(int x, int high) 350 { 351 if (sane_istest(x, GIT_ALPHA)) 352 x = (x & ~0x20) | high; 353 return x; 354 } 355 356 static inline int strtoul_ui(char const *s, int base, unsigned int *result) 357 { 358 unsigned long ul; 359 char *p; 360 361 errno = 0; 362 ul = strtoul(s, &p, base); 363 if (errno || *p || p == s || (unsigned int) ul != ul) 364 return -1; 365 *result = ul; 366 return 0; 367 } 368 369 static inline int strtol_i(char const *s, int base, int *result) 370 { 371 long ul; 372 char *p; 373 374 errno = 0; 375 ul = strtol(s, &p, base); 376 if (errno || *p || p == s || (int) ul != ul) 377 return -1; 378 *result = ul; 379 return 0; 380 } 381 382 #ifdef INTERNAL_QSORT 383 void git_qsort(void *base, size_t nmemb, size_t size, 384 int(*compar)(const void *, const void *)); 385 #define qsort git_qsort 386 #endif 387 388 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS 389 # define FORCE_DIR_SET_GID S_ISGID 390 #else 391 # define FORCE_DIR_SET_GID 0 392 #endif 393 394 #ifdef NO_NSEC 395 #undef USE_NSEC 396 #define ST_CTIME_NSEC(st) 0 397 #define ST_MTIME_NSEC(st) 0 398 #else 399 #ifdef USE_ST_TIMESPEC 400 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) 401 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) 402 #else 403 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) 404 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) 405 #endif 406 #endif 407 408 #endif 409