Merge branch 'ew/svn-pm'
[git/git.git] / git-compat-util.h
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1#ifndef GIT_COMPAT_UTIL_H
2#define GIT_COMPAT_UTIL_H
3
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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
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12#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
13
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14#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
15#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
16#define _GNU_SOURCE
17#define _BSD_SOURCE
18
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19#include <unistd.h>
20#include <stdio.h>
21#include <sys/stat.h>
22#include <fcntl.h>
23#include <stddef.h>
24#include <stdlib.h>
25#include <stdarg.h>
26#include <string.h>
27#include <errno.h>
28#include <limits.h>
29#include <sys/param.h>
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30#include <sys/types.h>
31#include <dirent.h>
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32#include <sys/time.h>
33#include <time.h>
34#include <signal.h>
35#include <sys/wait.h>
36#include <fnmatch.h>
37#include <sys/poll.h>
38#include <sys/socket.h>
39#include <assert.h>
40#include <regex.h>
41#include <netinet/in.h>
42#include <netinet/tcp.h>
43#include <arpa/inet.h>
44#include <netdb.h>
45#include <pwd.h>
46#include <grp.h>
47
48#ifndef NO_ICONV
49#include <iconv.h>
50#endif
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52/* On most systems <limits.h> would have given us this, but
53 * not on some systems (e.g. GNU/Hurd).
54 */
55#ifndef PATH_MAX
56#define PATH_MAX 4096
57#endif
58
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59#ifdef __GNUC__
60#define NORETURN __attribute__((__noreturn__))
61#else
62#define NORETURN
63#ifndef __attribute__
64#define __attribute__(x)
65#endif
66#endif
67
68/* General helper functions */
69extern void usage(const char *err) NORETURN;
70extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
71extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
72
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73extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
74extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
75extern void set_error_routine(void (*routine)(const char *err, va_list params));
76
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77#ifdef NO_MMAP
78
79#ifndef PROT_READ
80#define PROT_READ 1
81#define PROT_WRITE 2
82#define MAP_PRIVATE 1
83#define MAP_FAILED ((void*)-1)
84#endif
85
86#define mmap gitfakemmap
87#define munmap gitfakemunmap
88extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
89extern int gitfakemunmap(void *start, size_t length);
90
91#else /* NO_MMAP */
92
93#include <sys/mman.h>
94
95#endif /* NO_MMAP */
96
97#ifdef NO_SETENV
98#define setenv gitsetenv
99extern int gitsetenv(const char *, const char *, int);
100#endif
101
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102#ifdef NO_UNSETENV
103#define unsetenv gitunsetenv
104extern void gitunsetenv(const char *);
105#endif
106
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107#ifdef NO_STRCASESTR
108#define strcasestr gitstrcasestr
109extern char *gitstrcasestr(const char *haystack, const char *needle);
110#endif
111
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112#ifdef NO_STRLCPY
113#define strlcpy gitstrlcpy
114extern size_t gitstrlcpy(char *, const char *, size_t);
115#endif
116
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117static inline char* xstrdup(const char *str)
118{
119 char *ret = strdup(str);
120 if (!ret)
121 die("Out of memory, strdup failed");
122 return ret;
123}
124
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125static inline void *xmalloc(size_t size)
126{
127 void *ret = malloc(size);
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128 if (!ret && !size)
129 ret = malloc(1);
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130 if (!ret)
131 die("Out of memory, malloc failed");
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132#ifdef XMALLOC_POISON
133 memset(ret, 0xA5, size);
134#endif
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135 return ret;
136}
137
138static inline void *xrealloc(void *ptr, size_t size)
139{
140 void *ret = realloc(ptr, size);
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141 if (!ret && !size)
142 ret = realloc(ptr, 1);
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143 if (!ret)
144 die("Out of memory, realloc failed");
145 return ret;
146}
147
148static inline void *xcalloc(size_t nmemb, size_t size)
149{
150 void *ret = calloc(nmemb, size);
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151 if (!ret && (!nmemb || !size))
152 ret = calloc(1, 1);
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153 if (!ret)
154 die("Out of memory, calloc failed");
155 return ret;
156}
157
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158static inline ssize_t xread(int fd, void *buf, size_t len)
159{
160 ssize_t nr;
161 while (1) {
162 nr = read(fd, buf, len);
163 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
164 continue;
165 return nr;
166 }
167}
168
169static inline ssize_t xwrite(int fd, const void *buf, size_t len)
170{
171 ssize_t nr;
172 while (1) {
173 nr = write(fd, buf, len);
174 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
175 continue;
176 return nr;
177 }
178}
179
5bb1cda5 180static inline int has_extension(const char *filename, const char *ext)
83a2b841 181{
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182 size_t len = strlen(filename);
183 size_t extlen = strlen(ext);
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184 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
185}
186
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187/* Sane ctype - no locale, and works with signed chars */
188#undef isspace
189#undef isdigit
190#undef isalpha
191#undef isalnum
192#undef tolower
193#undef toupper
194extern unsigned char sane_ctype[256];
195#define GIT_SPACE 0x01
196#define GIT_DIGIT 0x02
197#define GIT_ALPHA 0x04
198#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
199#define isspace(x) sane_istest(x,GIT_SPACE)
200#define isdigit(x) sane_istest(x,GIT_DIGIT)
201#define isalpha(x) sane_istest(x,GIT_ALPHA)
202#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
203#define tolower(x) sane_case((unsigned char)(x), 0x20)
204#define toupper(x) sane_case((unsigned char)(x), 0)
205
206static inline int sane_case(int x, int high)
207{
208 if (sane_istest(x, GIT_ALPHA))
209 x = (x & ~0x20) | high;
210 return x;
211}
212
213#endif