Andrew's git - gitweb.git/blob

   1#ifndef GIT_COMPAT_UTIL_H
   2#define GIT_COMPAT_UTIL_H
   3
   4#ifndef FLEX_ARRAY
   5#if defined(__GNUC__) && (__GNUC__ < 3)
   6#define FLEX_ARRAY 0
   7#else
   8#define FLEX_ARRAY /* empty */
   9#endif
  10#endif
  11
  12#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  13
  14#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
  15#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
  16#define _GNU_SOURCE
  17#define _BSD_SOURCE
  18
  19#include <unistd.h>
  20#include <stdio.h>
  21#include <sys/stat.h>
  22#include <fcntl.h>
  23#include <stddef.h>
  24#include <stdlib.h>
  25#include <stdarg.h>
  26#include <string.h>
  27#include <errno.h>
  28#include <limits.h>
  29#include <sys/param.h>
  30#include <sys/types.h>
  31#include <dirent.h>
  32#include <sys/time.h>
  33#include <time.h>
  34#include <signal.h>
  35#include <sys/wait.h>
  36#include <fnmatch.h>
  37#include <sys/poll.h>
  38#include <sys/socket.h>
  39#include <assert.h>
  40#include <regex.h>
  41#include <netinet/in.h>
  42#include <netinet/tcp.h>
  43#include <arpa/inet.h>
  44#include <netdb.h>
  45#include <pwd.h>
  46#include <grp.h>
  47
  48#ifndef NO_ICONV
  49#include <iconv.h>
  50#endif
  51
  52/* On most systems <limits.h> would have given us this, but
  53 * not on some systems (e.g. GNU/Hurd).
  54 */
  55#ifndef PATH_MAX
  56#define PATH_MAX 4096
  57#endif
  58
  59#ifdef __GNUC__
  60#define NORETURN __attribute__((__noreturn__))
  61#else
  62#define NORETURN
  63#ifndef __attribute__
  64#define __attribute__(x)
  65#endif
  66#endif
  67
  68/* General helper functions */
  69extern void usage(const char *err) NORETURN;
  70extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  71extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
  72
  73extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
  74extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
  75extern void set_error_routine(void (*routine)(const char *err, va_list params));
  76
  77#ifdef NO_MMAP
  78
  79#ifndef PROT_READ
  80#define PROT_READ 1
  81#define PROT_WRITE 2
  82#define MAP_PRIVATE 1
  83#define MAP_FAILED ((void*)-1)
  84#endif
  85
  86#define mmap gitfakemmap
  87#define munmap gitfakemunmap
  88extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
  89extern int gitfakemunmap(void *start, size_t length);
  90
  91#else /* NO_MMAP */
  92
  93#include <sys/mman.h>
  94
  95#endif /* NO_MMAP */
  96
  97#ifdef NO_SETENV
  98#define setenv gitsetenv
  99extern int gitsetenv(const char *, const char *, int);
 100#endif
 101
 102#ifdef NO_UNSETENV
 103#define unsetenv gitunsetenv
 104extern void gitunsetenv(const char *);
 105#endif
 106
 107#ifdef NO_STRCASESTR
 108#define strcasestr gitstrcasestr
 109extern char *gitstrcasestr(const char *haystack, const char *needle);
 110#endif
 111
 112#ifdef NO_STRLCPY
 113#define strlcpy gitstrlcpy
 114extern size_t gitstrlcpy(char *, const char *, size_t);
 115#endif
 116
 117static inline char* xstrdup(const char *str)
 118{
 119        char *ret = strdup(str);
 120        if (!ret)
 121                die("Out of memory, strdup failed");
 122        return ret;
 123}
 124
 125static inline void *xmalloc(size_t size)
 126{
 127        void *ret = malloc(size);
 128        if (!ret && !size)
 129                ret = malloc(1);
 130        if (!ret)
 131                die("Out of memory, malloc failed");
 132#ifdef XMALLOC_POISON
 133        memset(ret, 0xA5, size);
 134#endif
 135        return ret;
 136}
 137
 138static inline void *xrealloc(void *ptr, size_t size)
 139{
 140        void *ret = realloc(ptr, size);
 141        if (!ret && !size)
 142                ret = realloc(ptr, 1);
 143        if (!ret)
 144                die("Out of memory, realloc failed");
 145        return ret;
 146}
 147
 148static inline void *xcalloc(size_t nmemb, size_t size)
 149{
 150        void *ret = calloc(nmemb, size);
 151        if (!ret && (!nmemb || !size))
 152                ret = calloc(1, 1);
 153        if (!ret)
 154                die("Out of memory, calloc failed");
 155        return ret;
 156}
 157
 158static inline ssize_t xread(int fd, void *buf, size_t len)
 159{
 160        ssize_t nr;
 161        while (1) {
 162                nr = read(fd, buf, len);
 163                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 164                        continue;
 165                return nr;
 166        }
 167}
 168
 169static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 170{
 171        ssize_t nr;
 172        while (1) {
 173                nr = write(fd, buf, len);
 174                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 175                        continue;
 176                return nr;
 177        }
 178}
 179
 180static inline int has_extension(const char *filename, const char *ext)
 181{
 182        size_t len = strlen(filename);
 183        size_t extlen = strlen(ext);
 184        return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 185}
 186
 187/* Sane ctype - no locale, and works with signed chars */
 188#undef isspace
 189#undef isdigit
 190#undef isalpha
 191#undef isalnum
 192#undef tolower
 193#undef toupper
 194extern unsigned char sane_ctype[256];
 195#define GIT_SPACE 0x01
 196#define GIT_DIGIT 0x02
 197#define GIT_ALPHA 0x04
 198#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 199#define isspace(x) sane_istest(x,GIT_SPACE)
 200#define isdigit(x) sane_istest(x,GIT_DIGIT)
 201#define isalpha(x) sane_istest(x,GIT_ALPHA)
 202#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 203#define tolower(x) sane_case((unsigned char)(x), 0x20)
 204#define toupper(x) sane_case((unsigned char)(x), 0)
 205
 206static inline int sane_case(int x, int high)
 207{
 208        if (sane_istest(x, GIT_ALPHA))
 209                x = (x & ~0x20) | high;
 210        return x;
 211}
 212
 213#endif