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