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