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#ifdef XMALLOC_POISON
  95        memset(ret, 0xA5, size);
  96#endif
  97        return ret;
  98}
  99
 100static inline void *xrealloc(void *ptr, size_t size)
 101{
 102        void *ret = realloc(ptr, size);
 103        if (!ret && !size)
 104                ret = realloc(ptr, 1);
 105        if (!ret)
 106                die("Out of memory, realloc failed");
 107        return ret;
 108}
 109
 110static inline void *xcalloc(size_t nmemb, size_t size)
 111{
 112        void *ret = calloc(nmemb, size);
 113        if (!ret && (!nmemb || !size))
 114                ret = calloc(1, 1);
 115        if (!ret)
 116                die("Out of memory, calloc failed");
 117        return ret;
 118}
 119
 120static inline ssize_t xread(int fd, void *buf, size_t len)
 121{
 122        ssize_t nr;
 123        while (1) {
 124                nr = read(fd, buf, len);
 125                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 126                        continue;
 127                return nr;
 128        }
 129}
 130
 131static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 132{
 133        ssize_t nr;
 134        while (1) {
 135                nr = write(fd, buf, len);
 136                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 137                        continue;
 138                return nr;
 139        }
 140}
 141
 142static inline int has_extension(const char *filename, const char *ext)
 143{
 144        size_t len = strlen(filename);
 145        size_t extlen = strlen(ext);
 146        return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 147}
 148
 149/* Sane ctype - no locale, and works with signed chars */
 150#undef isspace
 151#undef isdigit
 152#undef isalpha
 153#undef isalnum
 154#undef tolower
 155#undef toupper
 156extern unsigned char sane_ctype[256];
 157#define GIT_SPACE 0x01
 158#define GIT_DIGIT 0x02
 159#define GIT_ALPHA 0x04
 160#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 161#define isspace(x) sane_istest(x,GIT_SPACE)
 162#define isdigit(x) sane_istest(x,GIT_DIGIT)
 163#define isalpha(x) sane_istest(x,GIT_ALPHA)
 164#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 165#define tolower(x) sane_case((unsigned char)(x), 0x20)
 166#define toupper(x) sane_case((unsigned char)(x), 0)
 167
 168static inline int sane_case(int x, int high)
 169{
 170        if (sane_istest(x, GIT_ALPHA))
 171                x = (x & ~0x20) | high;
 172        return x;
 173}
 174
 175#endif