git-compat-util.h

   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 */
  29 extern void usage(const char *err) NORETURN;
  30 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  31 extern 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
  44 extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
  45 extern 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
  55 extern int gitsetenv(const char *, const char *, int);
  56 #endif
  57
  58 #ifdef NO_STRCASESTR
  59 #define strcasestr gitstrcasestr
  60 extern char *gitstrcasestr(const char *haystack, const char *needle);
  61 #endif
  62
  63 static inline void *xmalloc(size_t size)
  64 {
  65         void *ret = malloc(size);
  66         if (!ret)
  67                 die("Out of memory, malloc failed");
  68         return ret;
  69 }
  70
  71 static inline void *xrealloc(void *ptr, size_t size)
  72 {
  73         void *ret = realloc(ptr, size);
  74         if (!ret)
  75                 die("Out of memory, realloc failed");
  76         return ret;
  77 }
  78
  79 static inline void *xcalloc(size_t nmemb, size_t size)
  80 {
  81         void *ret = calloc(nmemb, size);
  82         if (!ret)
  83                 die("Out of memory, calloc failed");
  84         return ret;
  85 }
  86
  87 /* Sane ctype - no locale, and works with signed chars */
  88 #undef isspace
  89 #undef isdigit
  90 #undef isalpha
  91 #undef isalnum
  92 #undef tolower
  93 #undef toupper
  94 extern unsigned char sane_ctype[256];
  95 #define GIT_SPACE 0x01
  96 #define GIT_DIGIT 0x02
  97 #define GIT_ALPHA 0x04
  98 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
  99 #define isspace(x) sane_istest(x,GIT_SPACE)
 100 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 101 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 102 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 103 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 104 #define toupper(x) sane_case((unsigned char)(x), 0)
 105
 106 static inline int sane_case(int x, int high)
 107 {
 108         if (sane_istest(x, GIT_ALPHA))
 109                 x = (x & ~0x20) | high;
 110         return x;
 111 }
 112
 113 #endif