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