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#include <unistd.h>
  15#include <stdio.h>
  16#include <sys/stat.h>
  17#include <fcntl.h>
  18#include <stddef.h>
  19#include <stdlib.h>
  20#include <stdarg.h>
  21#include <string.h>
  22#include <errno.h>
  23#include <limits.h>
  24#include <sys/param.h>
  25#include <netinet/in.h>
  26#include <sys/types.h>
  27#include <dirent.h>
  28
  29#ifdef __GNUC__
  30#define NORETURN __attribute__((__noreturn__))
  31#else
  32#define NORETURN
  33#ifndef __attribute__
  34#define __attribute__(x)
  35#endif
  36#endif
  37
  38/* General helper functions */
  39extern void usage(const char *err) NORETURN;
  40extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  41extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
  42
  43extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
  44extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
  45extern void set_error_routine(void (*routine)(const char *err, va_list params));
  46
  47#ifdef NO_MMAP
  48
  49#ifndef PROT_READ
  50#define PROT_READ 1
  51#define PROT_WRITE 2
  52#define MAP_PRIVATE 1
  53#define MAP_FAILED ((void*)-1)
  54#endif
  55
  56#define mmap gitfakemmap
  57#define munmap gitfakemunmap
  58extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
  59extern int gitfakemunmap(void *start, size_t length);
  60
  61#else /* NO_MMAP */
  62
  63#include <sys/mman.h>
  64
  65#endif /* NO_MMAP */
  66
  67#ifdef NO_SETENV
  68#define setenv gitsetenv
  69extern int gitsetenv(const char *, const char *, int);
  70#endif
  71
  72#ifdef NO_UNSETENV
  73#define unsetenv gitunsetenv
  74extern void gitunsetenv(const char *);
  75#endif
  76
  77#ifdef NO_STRCASESTR
  78#define strcasestr gitstrcasestr
  79extern char *gitstrcasestr(const char *haystack, const char *needle);
  80#endif
  81
  82#ifdef NO_STRLCPY
  83#define strlcpy gitstrlcpy
  84extern size_t gitstrlcpy(char *, const char *, size_t);
  85#endif
  86
  87static inline void *xmalloc(size_t size)
  88{
  89        void *ret = malloc(size);
  90        if (!ret && !size)
  91                ret = malloc(1);
  92        if (!ret)
  93                die("Out of memory, malloc failed");
  94        return ret;
  95}
  96
  97static inline void *xrealloc(void *ptr, size_t size)
  98{
  99        void *ret = realloc(ptr, size);
 100        if (!ret && !size)
 101                ret = realloc(ptr, 1);
 102        if (!ret)
 103                die("Out of memory, realloc failed");
 104        return ret;
 105}
 106
 107static inline void *xcalloc(size_t nmemb, size_t size)
 108{
 109        void *ret = calloc(nmemb, size);
 110        if (!ret && (!nmemb || !size))
 111                ret = calloc(1, 1);
 112        if (!ret)
 113                die("Out of memory, calloc failed");
 114        return ret;
 115}
 116
 117static inline ssize_t xread(int fd, void *buf, size_t len)
 118{
 119        ssize_t nr;
 120        while (1) {
 121                nr = read(fd, buf, len);
 122                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 123                        continue;
 124                return nr;
 125        }
 126}
 127
 128static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 129{
 130        ssize_t nr;
 131        while (1) {
 132                nr = write(fd, buf, len);
 133                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 134                        continue;
 135                return nr;
 136        }
 137}
 138
 139/* Sane ctype - no locale, and works with signed chars */
 140#undef isspace
 141#undef isdigit
 142#undef isalpha
 143#undef isalnum
 144#undef tolower
 145#undef toupper
 146extern unsigned char sane_ctype[256];
 147#define GIT_SPACE 0x01
 148#define GIT_DIGIT 0x02
 149#define GIT_ALPHA 0x04
 150#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 151#define isspace(x) sane_istest(x,GIT_SPACE)
 152#define isdigit(x) sane_istest(x,GIT_DIGIT)
 153#define isalpha(x) sane_istest(x,GIT_ALPHA)
 154#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 155#define tolower(x) sane_case((unsigned char)(x), 0x20)
 156#define toupper(x) sane_case((unsigned char)(x), 0)
 157
 158static inline int sane_case(int x, int high)
 159{
 160        if (sane_istest(x, GIT_ALPHA))
 161                x = (x & ~0x20) | high;
 162        return x;
 163}
 164
 165#ifndef MAXPATHLEN
 166#define MAXPATHLEN 256
 167#endif
 168#endif