Andrew's git - gitweb.git/blob

c66e0a424707dde0e155aacf6b9adf4e355cb54f
   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#if !defined(__APPLE__) && !defined(__FreeBSD)
  15#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
  16#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
  17#endif
  18#define _GNU_SOURCE
  19#define _BSD_SOURCE
  20
  21#include <unistd.h>
  22#include <stdio.h>
  23#include <sys/stat.h>
  24#include <fcntl.h>
  25#include <stddef.h>
  26#include <stdlib.h>
  27#include <stdarg.h>
  28#include <string.h>
  29#include <errno.h>
  30#include <limits.h>
  31#include <sys/param.h>
  32#include <sys/types.h>
  33#include <dirent.h>
  34#include <sys/time.h>
  35#include <time.h>
  36#include <signal.h>
  37#include <sys/wait.h>
  38#include <fnmatch.h>
  39#include <sys/poll.h>
  40#include <sys/socket.h>
  41#include <assert.h>
  42#include <regex.h>
  43#include <netinet/in.h>
  44#include <netinet/tcp.h>
  45#include <arpa/inet.h>
  46#include <netdb.h>
  47#include <pwd.h>
  48#include <grp.h>
  49
  50#ifndef NO_ICONV
  51#include <iconv.h>
  52#endif
  53
  54/* On most systems <limits.h> would have given us this, but
  55 * not on some systems (e.g. GNU/Hurd).
  56 */
  57#ifndef PATH_MAX
  58#define PATH_MAX 4096
  59#endif
  60
  61#ifdef __GNUC__
  62#define NORETURN __attribute__((__noreturn__))
  63#else
  64#define NORETURN
  65#ifndef __attribute__
  66#define __attribute__(x)
  67#endif
  68#endif
  69
  70/* General helper functions */
  71extern void usage(const char *err) NORETURN;
  72extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  73extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
  74
  75extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
  76extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
  77extern void set_error_routine(void (*routine)(const char *err, va_list params));
  78
  79#ifdef NO_MMAP
  80
  81#ifndef PROT_READ
  82#define PROT_READ 1
  83#define PROT_WRITE 2
  84#define MAP_PRIVATE 1
  85#define MAP_FAILED ((void*)-1)
  86#endif
  87
  88#define mmap gitfakemmap
  89#define munmap gitfakemunmap
  90extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
  91extern int gitfakemunmap(void *start, size_t length);
  92
  93#else /* NO_MMAP */
  94
  95#include <sys/mman.h>
  96
  97#endif /* NO_MMAP */
  98
  99#ifdef NO_SETENV
 100#define setenv gitsetenv
 101extern int gitsetenv(const char *, const char *, int);
 102#endif
 103
 104#ifdef NO_UNSETENV
 105#define unsetenv gitunsetenv
 106extern void gitunsetenv(const char *);
 107#endif
 108
 109#ifdef NO_STRCASESTR
 110#define strcasestr gitstrcasestr
 111extern char *gitstrcasestr(const char *haystack, const char *needle);
 112#endif
 113
 114#ifdef NO_STRLCPY
 115#define strlcpy gitstrlcpy
 116extern size_t gitstrlcpy(char *, const char *, size_t);
 117#endif
 118
 119static inline char* xstrdup(const char *str)
 120{
 121        char *ret = strdup(str);
 122        if (!ret)
 123                die("Out of memory, strdup failed");
 124        return ret;
 125}
 126
 127static inline void *xmalloc(size_t size)
 128{
 129        void *ret = malloc(size);
 130        if (!ret && !size)
 131                ret = malloc(1);
 132        if (!ret)
 133                die("Out of memory, malloc failed");
 134#ifdef XMALLOC_POISON
 135        memset(ret, 0xA5, size);
 136#endif
 137        return ret;
 138}
 139
 140static inline void *xrealloc(void *ptr, size_t size)
 141{
 142        void *ret = realloc(ptr, size);
 143        if (!ret && !size)
 144                ret = realloc(ptr, 1);
 145        if (!ret)
 146                die("Out of memory, realloc failed");
 147        return ret;
 148}
 149
 150static inline void *xcalloc(size_t nmemb, size_t size)
 151{
 152        void *ret = calloc(nmemb, size);
 153        if (!ret && (!nmemb || !size))
 154                ret = calloc(1, 1);
 155        if (!ret)
 156                die("Out of memory, calloc failed");
 157        return ret;
 158}
 159
 160static inline ssize_t xread(int fd, void *buf, size_t len)
 161{
 162        ssize_t nr;
 163        while (1) {
 164                nr = read(fd, buf, len);
 165                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 166                        continue;
 167                return nr;
 168        }
 169}
 170
 171static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 172{
 173        ssize_t nr;
 174        while (1) {
 175                nr = write(fd, buf, len);
 176                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 177                        continue;
 178                return nr;
 179        }
 180}
 181
 182static inline int has_extension(const char *filename, const char *ext)
 183{
 184        size_t len = strlen(filename);
 185        size_t extlen = strlen(ext);
 186        return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 187}
 188
 189/* Sane ctype - no locale, and works with signed chars */
 190#undef isspace
 191#undef isdigit
 192#undef isalpha
 193#undef isalnum
 194#undef tolower
 195#undef toupper
 196extern unsigned char sane_ctype[256];
 197#define GIT_SPACE 0x01
 198#define GIT_DIGIT 0x02
 199#define GIT_ALPHA 0x04
 200#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 201#define isspace(x) sane_istest(x,GIT_SPACE)
 202#define isdigit(x) sane_istest(x,GIT_DIGIT)
 203#define isalpha(x) sane_istest(x,GIT_ALPHA)
 204#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 205#define tolower(x) sane_case((unsigned char)(x), 0x20)
 206#define toupper(x) sane_case((unsigned char)(x), 0)
 207
 208static inline int sane_case(int x, int high)
 209{
 210        if (sane_istest(x, GIT_ALPHA))
 211                x = (x & ~0x20) | high;
 212        return x;
 213}
 214
 215#endif