git-compat-util.h

   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 #if defined(__GNUC__) && (__GNUC__ < 3)
   8 #define FLEX_ARRAY 0
   9 #else
  10 #define FLEX_ARRAY /* empty */
  11 #endif
  12 #endif
  13
  14 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  15
  16 #if !defined(__APPLE__) && !defined(__FreeBSD__)
  17 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
  18 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
  19 #endif
  20 #define _ALL_SOURCE 1
  21 #define _GNU_SOURCE 1
  22 #define _BSD_SOURCE 1
  23
  24 #include <unistd.h>
  25 #include <stdio.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28 #include <stddef.h>
  29 #include <stdlib.h>
  30 #include <stdarg.h>
  31 #include <string.h>
  32 #include <errno.h>
  33 #include <limits.h>
  34 #include <sys/param.h>
  35 #include <sys/types.h>
  36 #include <dirent.h>
  37 #include <sys/time.h>
  38 #include <time.h>
  39 #include <signal.h>
  40 //#include <sys/wait.h>
  41 #include <fnmatch.h>
  42 //#include <sys/poll.h>
  43 //#include <sys/socket.h>
  44 //#include <sys/select.h>
  45 #include <assert.h>
  46 #include <regex.h>
  47 //#include <netinet/in.h>
  48 //#include <netinet/tcp.h>
  49 //#include <arpa/inet.h>
  50 #ifndef NO_ETC_PASSWD
  51 #include <netdb.h>
  52 #include <pwd.h>
  53 #include <inttypes.h>
  54 #if defined(__CYGWIN__)
  55 #undef _XOPEN_SOURCE
  56 #include <grp.h>
  57 #define _XOPEN_SOURCE 600
  58 #else
  59 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
  60 #include <grp.h>
  61 #define _ALL_SOURCE 1
  62 #endif
  63 #endif
  64
  65 #ifndef NO_ICONV
  66 #include <iconv.h>
  67 #endif
  68
  69 /* On most systems <limits.h> would have given us this, but
  70  * not on some systems (e.g. GNU/Hurd).
  71  */
  72 #ifndef PATH_MAX
  73 #define PATH_MAX 4096
  74 #endif
  75
  76 #ifndef PRIuMAX
  77 #define PRIuMAX "llu"
  78 #endif
  79
  80 #ifdef __GNUC__
  81 #define NORETURN __attribute__((__noreturn__))
  82 #else
  83 #define NORETURN
  84 #ifndef __attribute__
  85 #define __attribute__(x)
  86 #endif
  87 #endif
  88
  89 /* General helper functions */
  90 extern void usage(const char *err) NORETURN;
  91 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  92 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
  93 extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
  94
  95 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
  96 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
  97 extern void set_error_routine(void (*routine)(const char *err, va_list params));
  98 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
  99
 100 #ifdef NO_MMAP
 101
 102 #ifndef PROT_READ
 103 #define PROT_READ 1
 104 #define PROT_WRITE 2
 105 #define MAP_PRIVATE 1
 106 #define MAP_FAILED ((void*)-1)
 107 #endif
 108
 109 #define mmap git_mmap
 110 #define munmap git_munmap
 111 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 112 extern int git_munmap(void *start, size_t length);
 113
 114 /* This value must be multiple of (pagesize * 2) */
 115 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 116
 117 #else /* NO_MMAP */
 118
 119 #include <sys/mman.h>
 120
 121 /* This value must be multiple of (pagesize * 2) */
 122 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 123         (sizeof(void*) >= 8 \
 124                 ?  1 * 1024 * 1024 * 1024 \
 125                 : 32 * 1024 * 1024)
 126
 127 #endif /* NO_MMAP */
 128
 129 #define DEFAULT_PACKED_GIT_LIMIT \
 130         ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 131
 132 #ifdef NO_PREAD
 133 #define pread git_pread
 134 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 135 #endif
 136
 137 #ifdef NO_SETENV
 138 #define setenv gitsetenv
 139 extern int gitsetenv(const char *, const char *, int);
 140 #endif
 141
 142 #ifdef NO_UNSETENV
 143 #define unsetenv gitunsetenv
 144 extern void gitunsetenv(const char *);
 145 #endif
 146
 147 #ifdef NO_STRCASESTR
 148 #define strcasestr gitstrcasestr
 149 extern char *gitstrcasestr(const char *haystack, const char *needle);
 150 #endif
 151
 152 #ifdef NO_STRLCPY
 153 #define strlcpy gitstrlcpy
 154 extern size_t gitstrlcpy(char *, const char *, size_t);
 155 #endif
 156
 157 #ifdef NO_STRTOUMAX
 158 #define strtoumax gitstrtoumax
 159 extern uintmax_t gitstrtoumax(const char *, char **, int);
 160 #endif
 161
 162 extern void release_pack_memory(size_t);
 163
 164 static inline char* xstrdup(const char *str)
 165 {
 166         char *ret = strdup(str);
 167         if (!ret) {
 168                 release_pack_memory(strlen(str) + 1);
 169                 ret = strdup(str);
 170                 if (!ret)
 171                         die("Out of memory, strdup failed");
 172         }
 173         return ret;
 174 }
 175
 176 static inline void *xmalloc(size_t size)
 177 {
 178         void *ret = malloc(size);
 179         if (!ret && !size)
 180                 ret = malloc(1);
 181         if (!ret) {
 182                 release_pack_memory(size);
 183                 ret = malloc(size);
 184                 if (!ret && !size)
 185                         ret = malloc(1);
 186                 if (!ret)
 187                         die("Out of memory, malloc failed");
 188         }
 189 #ifdef XMALLOC_POISON
 190         memset(ret, 0xA5, size);
 191 #endif
 192         return ret;
 193 }
 194
 195 static inline void *xrealloc(void *ptr, size_t size)
 196 {
 197         void *ret = realloc(ptr, size);
 198         if (!ret && !size)
 199                 ret = realloc(ptr, 1);
 200         if (!ret) {
 201                 release_pack_memory(size);
 202                 ret = realloc(ptr, size);
 203                 if (!ret && !size)
 204                         ret = realloc(ptr, 1);
 205                 if (!ret)
 206                         die("Out of memory, realloc failed");
 207         }
 208         return ret;
 209 }
 210
 211 static inline void *xcalloc(size_t nmemb, size_t size)
 212 {
 213         void *ret = calloc(nmemb, size);
 214         if (!ret && (!nmemb || !size))
 215                 ret = calloc(1, 1);
 216         if (!ret) {
 217                 release_pack_memory(nmemb * size);
 218                 ret = calloc(nmemb, size);
 219                 if (!ret && (!nmemb || !size))
 220                         ret = calloc(1, 1);
 221                 if (!ret)
 222                         die("Out of memory, calloc failed");
 223         }
 224         return ret;
 225 }
 226
 227 static inline void *xmmap(void *start, size_t length,
 228         int prot, int flags, int fd, off_t offset)
 229 {
 230         void *ret = mmap(start, length, prot, flags, fd, offset);
 231         if (ret == MAP_FAILED) {
 232                 if (!length)
 233                         return NULL;
 234                 release_pack_memory(length);
 235                 ret = mmap(start, length, prot, flags, fd, offset);
 236                 if (ret == MAP_FAILED)
 237                         die("Out of memory? mmap failed: %s", strerror(errno));
 238         }
 239         return ret;
 240 }
 241
 242 static inline ssize_t xread(int fd, void *buf, size_t len)
 243 {
 244         ssize_t nr;
 245         while (1) {
 246                 nr = read(fd, buf, len);
 247                 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 248                         continue;
 249                 return nr;
 250         }
 251 }
 252
 253 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 254 {
 255         ssize_t nr;
 256         while (1) {
 257                 nr = write(fd, buf, len);
 258                 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 259                         continue;
 260                 return nr;
 261         }
 262 }
 263
 264 static inline size_t xsize_t(off_t len)
 265 {
 266         return (size_t)len;
 267 }
 268
 269 static inline int has_extension(const char *filename, const char *ext)
 270 {
 271         size_t len = strlen(filename);
 272         size_t extlen = strlen(ext);
 273         return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 274 }
 275
 276 /* Sane ctype - no locale, and works with signed chars */
 277 #undef isspace
 278 #undef isdigit
 279 #undef isalpha
 280 #undef isalnum
 281 #undef tolower
 282 #undef toupper
 283 extern unsigned char sane_ctype[256];
 284 #define GIT_SPACE 0x01
 285 #define GIT_DIGIT 0x02
 286 #define GIT_ALPHA 0x04
 287 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 288 #define isspace(x) sane_istest(x,GIT_SPACE)
 289 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 290 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 291 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 292 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 293 #define toupper(x) sane_case((unsigned char)(x), 0)
 294
 295 static inline int sane_case(int x, int high)
 296 {
 297         if (sane_istest(x, GIT_ALPHA))
 298                 x = (x & ~0x20) | high;
 299         return x;
 300 }
 301
 302 static inline int prefixcmp(const char *str, const char *prefix)
 303 {
 304         return strncmp(str, prefix, strlen(prefix));
 305 }
 306
 307 // MinGW
 308
 309 #ifndef S_ISLNK
 310 #define S_IFLNK    0120000 /* Symbolic link */
 311 #define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
 312 #endif
 313
 314 #ifndef S_ISGRP
 315 #define S_ISGRP(x) 0
 316 #define S_IRGRP 0
 317 #define S_IWGRP 0
 318 #define S_IXGRP 0
 319 #define S_ISGID 0
 320 #define S_IROTH 0
 321 #define S_IXOTH 0
 322 #endif
 323
 324 int readlink(const char *path, char *buf, size_t bufsiz);
 325 int symlink(const char *oldpath, const char *newpath);
 326 #define link symlink
 327 int fchmod(int fildes, mode_t mode);
 328 int lstat(const char *file_name, struct stat *buf);
 329
 330 /* missing: link, mkstemp, fchmod, getuid (?), gettimeofday */
 331 int socketpair(int d, int type, int protocol, int sv[2]);
 332 #define AF_UNIX 0
 333 #define SOCK_STREAM 0
 334 int syslog(int type, char *bufp, ...);
 335 #define LOG_ERR 1
 336 #define LOG_INFO 2
 337 #define LOG_DAEMON 4
 338 unsigned int alarm(unsigned int seconds);
 339 #include <winsock2.h>
 340 void mingw_execve(const char *cmd, const char **argv, const char **env);
 341 #define execve mingw_execve
 342 int fork();
 343 typedef int pid_t;
 344 #define waitpid(pid, status, options) \
 345         ((options == 0) ? _cwait((status), (pid), 0) \
 346                 : (errno = EINVAL, -1))
 347 #define WIFEXITED(x) ((unsigned)(x) < 259)      /* STILL_ACTIVE */
 348 #define WEXITSTATUS(x) ((x) & 0xff)
 349 #define WIFSIGNALED(x) ((unsigned)(x) > 259)
 350 #define WTERMSIG(x) (x)
 351 #define WNOHANG 1
 352 #define SIGKILL 0
 353 #define SIGCHLD 0
 354 #define SIGALRM 0
 355 #define ECONNABORTED 0
 356
 357 int kill(pid_t pid, int sig);
 358 unsigned int sleep (unsigned int __seconds);
 359 const char *inet_ntop(int af, const void *src,
 360                              char *dst, size_t cnt);
 361 int mkstemp (char *__template);
 362 int gettimeofday(struct timeval *tv, void *tz);
 363 int pipe(int filedes[2]);
 364
 365 struct pollfd {
 366         int fd;           /* file descriptor */
 367         short events;     /* requested events */
 368         short revents;    /* returned events */
 369 };
 370 int poll(struct pollfd *ufds, unsigned int nfds, int timeout);
 371 #define POLLIN 1
 372 #define POLLHUP 2
 373
 374 typedef int siginfo_t;
 375 struct sigaction {
 376         void (*sa_handler)(int);
 377         void (*sa_sigaction)(int, siginfo_t *, void *);
 378         sigset_t sa_mask;
 379         int sa_flags;
 380         void (*sa_restorer)(void);
 381 };
 382 #define SA_RESTART 0
 383 #define ITIMER_REAL 0
 384
 385 struct itimerval { struct timeval it_interval, it_value; };
 386
 387 static inline int git_mkdir(const char *path, int mode)
 388 {
 389         return mkdir(path);
 390 }
 391 #define mkdir git_mkdir
 392
 393 static inline int git_unlink(const char *pathname) {
 394         /* read-only files cannot be removed */
 395         chmod(pathname, 0666);
 396         return unlink(pathname);
 397 }
 398 #define unlink git_unlink
 399
 400 #define open(P, F, M...) \
 401         (__builtin_constant_p(*(P)) && !strcmp(P, "/dev/null") ? \
 402                 open("nul", F, ## M) : open(P, F, ## M))
 403
 404 #include <time.h>
 405 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 406 struct tm *localtime_r(const time_t *timep, struct tm *result);
 407 #define hstrerror strerror
 408
 409 char *mingw_getcwd(char *pointer, int len);
 410 #define getcwd mingw_getcwd
 411
 412 int mingw_socket(int domain, int type, int protocol);
 413 #define socket mingw_socket
 414
 415 #define setlinebuf(x)
 416 #define fsync(x)
 417
 418 extern void quote_argv(const char **dst, const char **src);
 419 extern const char *parse_interpreter(const char *cmd);
 420
 421 #endif