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
  82static inline void *xmalloc(size_t size)
  83{
  84        void *ret = malloc(size);
  85        if (!ret && !size)
  86                ret = malloc(1);
  87        if (!ret)
  88                die("Out of memory, malloc failed");
  89        return ret;
  90}
  91
  92static inline void *xrealloc(void *ptr, size_t size)
  93{
  94        void *ret = realloc(ptr, size);
  95        if (!ret && !size)
  96                ret = realloc(ptr, 1);
  97        if (!ret)
  98                die("Out of memory, realloc failed");
  99        return ret;
 100}
 101
 102static inline void *xcalloc(size_t nmemb, size_t size)
 103{
 104        void *ret = calloc(nmemb, size);
 105        if (!ret && (!nmemb || !size))
 106                ret = calloc(1, 1);
 107        if (!ret)
 108                die("Out of memory, calloc failed");
 109        return ret;
 110}
 111
 112static inline ssize_t xread(int fd, void *buf, size_t len)
 113{
 114        ssize_t nr;
 115        while (1) {
 116                nr = read(fd, buf, len);
 117                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 118                        continue;
 119                return nr;
 120        }
 121}
 122
 123static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 124{
 125        ssize_t nr;
 126        while (1) {
 127                nr = write(fd, buf, len);
 128                if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 129                        continue;
 130                return nr;
 131        }
 132}
 133
 134/* Sane ctype - no locale, and works with signed chars */
 135#undef isspace
 136#undef isdigit
 137#undef isalpha
 138#undef isalnum
 139#undef tolower
 140#undef toupper
 141extern unsigned char sane_ctype[256];
 142#define GIT_SPACE 0x01
 143#define GIT_DIGIT 0x02
 144#define GIT_ALPHA 0x04
 145#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 146#define isspace(x) sane_istest(x,GIT_SPACE)
 147#define isdigit(x) sane_istest(x,GIT_DIGIT)
 148#define isalpha(x) sane_istest(x,GIT_ALPHA)
 149#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 150#define tolower(x) sane_case((unsigned char)(x), 0x20)
 151#define toupper(x) sane_case((unsigned char)(x), 0)
 152
 153static inline int sane_case(int x, int high)
 154{
 155        if (sane_istest(x, GIT_ALPHA))
 156                x = (x & ~0x20) | high;
 157        return x;
 158}
 159
 160#ifndef MAXPATHLEN
 161#define MAXPATHLEN 256
 162#endif
 163#endif