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