1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
5 #if defined(__GNUC__) && (__GNUC__ < 3)
8 #define FLEX_ARRAY /* empty */
12 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
14 #if !defined(__APPLE__) && !defined(__FreeBSD)
15 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
16 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
31 #include <sys/param.h>
32 #include <sys/types.h>
40 #include <sys/socket.h>
43 #include <netinet/in.h>
44 #include <netinet/tcp.h>
45 #include <arpa/inet.h>
54 /* On most systems <limits.h> would have given us this, but
55 * not on some systems (e.g. GNU/Hurd).
62 #define NORETURN __attribute__((__noreturn__))
66 #define __attribute__(x)
70 /* General helper functions */
71 extern void usage(const char *err
) NORETURN
;
72 extern void die(const char *err
, ...) NORETURN
__attribute__((format (printf
, 1, 2)));
73 extern int error(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
75 extern void set_usage_routine(void (*routine
)(const char *err
) NORETURN
);
76 extern void set_die_routine(void (*routine
)(const char *err
, va_list params
) NORETURN
);
77 extern void set_error_routine(void (*routine
)(const char *err
, va_list params
));
85 #define MAP_FAILED ((void*)-1)
88 #define mmap gitfakemmap
89 #define munmap gitfakemunmap
90 extern void *gitfakemmap(void *start
, size_t length
, int prot
, int flags
, int fd
, off_t offset
);
91 extern int gitfakemunmap(void *start
, size_t length
);
100 #define setenv gitsetenv
101 extern int gitsetenv(const char *, const char *, int);
105 #define unsetenv gitunsetenv
106 extern void gitunsetenv(const char *);
110 #define strcasestr gitstrcasestr
111 extern char *gitstrcasestr(const char *haystack
, const char *needle
);
115 #define strlcpy gitstrlcpy
116 extern size_t gitstrlcpy(char *, const char *, size_t);
119 static inline char* xstrdup(const char *str
)
121 char *ret
= strdup(str
);
123 die("Out of memory, strdup failed");
127 static inline void *xmalloc(size_t size
)
129 void *ret
= malloc(size
);
133 die("Out of memory, malloc failed");
134 #ifdef XMALLOC_POISON
135 memset(ret
, 0xA5, size
);
140 static inline void *xrealloc(void *ptr
, size_t size
)
142 void *ret
= realloc(ptr
, size
);
144 ret
= realloc(ptr
, 1);
146 die("Out of memory, realloc failed");
150 static inline void *xcalloc(size_t nmemb
, size_t size
)
152 void *ret
= calloc(nmemb
, size
);
153 if (!ret
&& (!nmemb
|| !size
))
156 die("Out of memory, calloc failed");
160 static inline ssize_t
xread(int fd
, void *buf
, size_t len
)
164 nr
= read(fd
, buf
, len
);
165 if ((nr
< 0) && (errno
== EAGAIN
|| errno
== EINTR
))
171 static inline ssize_t
xwrite(int fd
, const void *buf
, size_t len
)
175 nr
= write(fd
, buf
, len
);
176 if ((nr
< 0) && (errno
== EAGAIN
|| errno
== EINTR
))
182 static inline int has_extension(const char *filename
, const char *ext
)
184 size_t len
= strlen(filename
);
185 size_t extlen
= strlen(ext
);
186 return len
> extlen
&& !memcmp(filename
+ len
- extlen
, ext
, extlen
);
189 /* Sane ctype - no locale, and works with signed chars */
196 extern unsigned char sane_ctype
[256];
197 #define GIT_SPACE 0x01
198 #define GIT_DIGIT 0x02
199 #define GIT_ALPHA 0x04
200 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
201 #define isspace(x) sane_istest(x,GIT_SPACE)
202 #define isdigit(x) sane_istest(x,GIT_DIGIT)
203 #define isalpha(x) sane_istest(x,GIT_ALPHA)
204 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
205 #define tolower(x) sane_case((unsigned char)(x), 0x20)
206 #define toupper(x) sane_case((unsigned char)(x), 0)
208 static inline int sane_case(int x
, int high
)
210 if (sane_istest(x
, GIT_ALPHA
))
211 x
= (x
& ~0x20) | high
;