Andrew's git - gitweb.git/blob

   1#ifndef GIT_COMPAT_UTIL_H
   2#define GIT_COMPAT_UTIL_H
   3
   4#include <unistd.h>
   5#include <stdio.h>
   6#include <sys/stat.h>
   7#include <fcntl.h>
   8#include <stddef.h>
   9#include <stdlib.h>
  10#include <stdarg.h>
  11#include <string.h>
  12#include <errno.h>
  13#include <limits.h>
  14#include <sys/param.h>
  15#include <netinet/in.h>
  16#include <sys/types.h>
  17#include <dirent.h>
  18
  19#ifdef __GNUC__
  20#define NORETURN __attribute__((__noreturn__))
  21#else
  22#define NORETURN
  23#ifndef __attribute__
  24#define __attribute__(x)
  25#endif
  26#endif
  27
  28/* General helper functions */
  29extern void usage(const char *err) NORETURN;
  30extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  31extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
  32
  33#ifdef NO_MMAP
  34
  35#ifndef PROT_READ
  36#define PROT_READ 1
  37#define PROT_WRITE 2
  38#define MAP_PRIVATE 1
  39#define MAP_FAILED ((void*)-1)
  40#endif
  41
  42#define mmap gitfakemmap
  43#define munmap gitfakemunmap
  44extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
  45extern int gitfakemunmap(void *start, size_t length);
  46
  47#else /* NO_MMAP */
  48
  49#include <sys/mman.h>
  50
  51#endif /* NO_MMAP */
  52
  53#ifdef NO_SETENV
  54#define setenv gitsetenv
  55extern int gitsetenv(const char *, const char *, int);
  56#endif
  57
  58#ifdef NO_STRCASESTR
  59#define strcasestr gitstrcasestr
  60extern char *gitstrcasestr(const char *haystack, const char *needle);
  61#endif
  62
  63static inline void *xmalloc(size_t size)
  64{
  65        void *ret = malloc(size);
  66        if (!ret && !size)
  67                ret = malloc(1);
  68        if (!ret)
  69                die("Out of memory, malloc failed");
  70        return ret;
  71}
  72
  73static inline void *xrealloc(void *ptr, size_t size)
  74{
  75        void *ret = realloc(ptr, size);
  76        if (!ret && !size)
  77                ret = realloc(ptr, 1);
  78        if (!ret)
  79                die("Out of memory, realloc failed");
  80        return ret;
  81}
  82
  83static inline void *xcalloc(size_t nmemb, size_t size)
  84{
  85        void *ret = calloc(nmemb, size);
  86        if (!ret && (!nmemb || !size))
  87                ret = calloc(1, 1);
  88        if (!ret)
  89                die("Out of memory, calloc failed");
  90        return ret;
  91}
  92
  93static inline ssize_t xread(int fd, void *buf, size_t len)
  94{
  95        ssize_t nr;
  96        while (1) {
  97                nr = read(fd, buf, len);
  98                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
  99                        continue;
 100                return nr;
 101        }
 102}
 103
 104static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 105{
 106        ssize_t nr;
 107        while (1) {
 108                nr = write(fd, buf, len);
 109                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 110                        continue;
 111                return nr;
 112        }
 113}
 114
 115/* Sane ctype - no locale, and works with signed chars */
 116#undef isspace
 117#undef isdigit
 118#undef isalpha
 119#undef isalnum
 120#undef tolower
 121#undef toupper
 122extern unsigned char sane_ctype[256];
 123#define GIT_SPACE 0x01
 124#define GIT_DIGIT 0x02
 125#define GIT_ALPHA 0x04
 126#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 127#define isspace(x) sane_istest(x,GIT_SPACE)
 128#define isdigit(x) sane_istest(x,GIT_DIGIT)
 129#define isalpha(x) sane_istest(x,GIT_ALPHA)
 130#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 131#define tolower(x) sane_case((unsigned char)(x), 0x20)
 132#define toupper(x) sane_case((unsigned char)(x), 0)
 133
 134static inline int sane_case(int x, int high)
 135{
 136        if (sane_istest(x, GIT_ALPHA))
 137                x = (x & ~0x20) | high;
 138        return x;
 139}
 140
 141#ifndef MAXPATHLEN
 142#define MAXPATHLEN 256
 143#endif
 144#endif