Set _ALL_SOURCE for AIX, but avoid its struct list.
[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
95ca1c6c 14#if !defined(__APPLE__) && !defined(__FreeBSD__)
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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 */
c902c9a6 17#endif
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18#define _ALL_SOURCE 1
19#define _GNU_SOURCE 1
20#define _BSD_SOURCE 1
85023577 21
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22#include <unistd.h>
23#include <stdio.h>
24#include <sys/stat.h>
25#include <fcntl.h>
26#include <stddef.h>
27#include <stdlib.h>
28#include <stdarg.h>
29#include <string.h>
30#include <errno.h>
31#include <limits.h>
32#include <sys/param.h>
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33#include <sys/types.h>
34#include <dirent.h>
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35#include <sys/time.h>
36#include <time.h>
37#include <signal.h>
38#include <sys/wait.h>
39#include <fnmatch.h>
40#include <sys/poll.h>
41#include <sys/socket.h>
42#include <assert.h>
43#include <regex.h>
44#include <netinet/in.h>
45#include <netinet/tcp.h>
46#include <arpa/inet.h>
47#include <netdb.h>
48#include <pwd.h>
fb952206 49#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577 50#include <grp.h>
fb952206 51#define _ALL_SOURCE 1
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52
53#ifndef NO_ICONV
54#include <iconv.h>
55#endif
4050c0df 56
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57/* On most systems <limits.h> would have given us this, but
58 * not on some systems (e.g. GNU/Hurd).
59 */
60#ifndef PATH_MAX
61#define PATH_MAX 4096
62#endif
63
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64#ifdef __GNUC__
65#define NORETURN __attribute__((__noreturn__))
66#else
67#define NORETURN
68#ifndef __attribute__
69#define __attribute__(x)
70#endif
71#endif
72
73/* General helper functions */
74extern void usage(const char *err) NORETURN;
75extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
76extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
fa39b6b5 77extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df 78
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79extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
80extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
81extern void set_error_routine(void (*routine)(const char *err, va_list params));
fa39b6b5 82extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
39a3f5ea 83
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84#ifdef NO_MMAP
85
86#ifndef PROT_READ
87#define PROT_READ 1
88#define PROT_WRITE 2
89#define MAP_PRIVATE 1
90#define MAP_FAILED ((void*)-1)
91#endif
92
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93#define mmap git_mmap
94#define munmap git_munmap
95extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
96extern int git_munmap(void *start, size_t length);
4050c0df 97
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98#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
99
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100#else /* NO_MMAP */
101
102#include <sys/mman.h>
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103#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
104 (sizeof(void*) >= 8 \
105 ? 1 * 1024 * 1024 * 1024 \
106 : 32 * 1024 * 1024)
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107
108#endif /* NO_MMAP */
109
22bac0ea 110#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a 111 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d 112
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113#ifdef NO_PREAD
114#define pread git_pread
115extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
116#endif
117
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118#ifdef NO_SETENV
119#define setenv gitsetenv
120extern int gitsetenv(const char *, const char *, int);
121#endif
122
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123#ifdef NO_UNSETENV
124#define unsetenv gitunsetenv
125extern void gitunsetenv(const char *);
126#endif
127
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128#ifdef NO_STRCASESTR
129#define strcasestr gitstrcasestr
130extern char *gitstrcasestr(const char *haystack, const char *needle);
131#endif
132
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133#ifdef NO_STRLCPY
134#define strlcpy gitstrlcpy
135extern size_t gitstrlcpy(char *, const char *, size_t);
136#endif
137
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138extern void release_pack_memory(size_t);
139
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140static inline char* xstrdup(const char *str)
141{
142 char *ret = strdup(str);
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143 if (!ret) {
144 release_pack_memory(strlen(str) + 1);
145 ret = strdup(str);
146 if (!ret)
147 die("Out of memory, strdup failed");
148 }
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149 return ret;
150}
151
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152static inline void *xmalloc(size_t size)
153{
154 void *ret = malloc(size);
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155 if (!ret && !size)
156 ret = malloc(1);
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157 if (!ret) {
158 release_pack_memory(size);
159 ret = malloc(size);
160 if (!ret && !size)
161 ret = malloc(1);
162 if (!ret)
163 die("Out of memory, malloc failed");
164 }
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165#ifdef XMALLOC_POISON
166 memset(ret, 0xA5, size);
167#endif
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168 return ret;
169}
170
171static inline void *xrealloc(void *ptr, size_t size)
172{
173 void *ret = realloc(ptr, size);
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174 if (!ret && !size)
175 ret = realloc(ptr, 1);
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176 if (!ret) {
177 release_pack_memory(size);
178 ret = realloc(ptr, size);
179 if (!ret && !size)
180 ret = realloc(ptr, 1);
181 if (!ret)
182 die("Out of memory, realloc failed");
183 }
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184 return ret;
185}
186
187static inline void *xcalloc(size_t nmemb, size_t size)
188{
189 void *ret = calloc(nmemb, size);
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190 if (!ret && (!nmemb || !size))
191 ret = calloc(1, 1);
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192 if (!ret) {
193 release_pack_memory(nmemb * size);
194 ret = calloc(nmemb, size);
195 if (!ret && (!nmemb || !size))
196 ret = calloc(1, 1);
197 if (!ret)
198 die("Out of memory, calloc failed");
199 }
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200 return ret;
201}
202
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203static inline void *xmmap(void *start, size_t length,
204 int prot, int flags, int fd, off_t offset)
205{
206 void *ret = mmap(start, length, prot, flags, fd, offset);
207 if (ret == MAP_FAILED) {
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208 if (!length)
209 return NULL;
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210 release_pack_memory(length);
211 ret = mmap(start, length, prot, flags, fd, offset);
212 if (ret == MAP_FAILED)
213 die("Out of memory? mmap failed: %s", strerror(errno));
214 }
215 return ret;
216}
217
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218static inline ssize_t xread(int fd, void *buf, size_t len)
219{
220 ssize_t nr;
221 while (1) {
222 nr = read(fd, buf, len);
223 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
224 continue;
225 return nr;
226 }
227}
228
229static inline ssize_t xwrite(int fd, const void *buf, size_t len)
230{
231 ssize_t nr;
232 while (1) {
233 nr = write(fd, buf, len);
234 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
235 continue;
236 return nr;
237 }
238}
239
5bb1cda5 240static inline int has_extension(const char *filename, const char *ext)
83a2b841 241{
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242 size_t len = strlen(filename);
243 size_t extlen = strlen(ext);
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244 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
245}
246
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247/* Sane ctype - no locale, and works with signed chars */
248#undef isspace
249#undef isdigit
250#undef isalpha
251#undef isalnum
252#undef tolower
253#undef toupper
254extern unsigned char sane_ctype[256];
255#define GIT_SPACE 0x01
256#define GIT_DIGIT 0x02
257#define GIT_ALPHA 0x04
258#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
259#define isspace(x) sane_istest(x,GIT_SPACE)
260#define isdigit(x) sane_istest(x,GIT_DIGIT)
261#define isalpha(x) sane_istest(x,GIT_ALPHA)
262#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
263#define tolower(x) sane_case((unsigned char)(x), 0x20)
264#define toupper(x) sane_case((unsigned char)(x), 0)
265
266static inline int sane_case(int x, int high)
267{
268 if (sane_istest(x, GIT_ALPHA))
269 x = (x & ~0x20) | high;
270 return x;
271}
272
273#endif