Increase packedGit{Limit,WindowSize} on 64 bit systems.
[git/git.git] / git-compat-util.h
1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
3
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
12 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
13
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 */
17 #endif
18 #define _GNU_SOURCE
19 #define _BSD_SOURCE
20
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>
32 #include <sys/types.h>
33 #include <dirent.h>
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
53
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
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 */
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)));
74 extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
75
76 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
77 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
78 extern void set_error_routine(void (*routine)(const char *err, va_list params));
79 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
80
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
90 #define mmap git_mmap
91 #define munmap git_munmap
92 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
93 extern int git_munmap(void *start, size_t length);
94
95 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
96
97 #else /* NO_MMAP */
98
99 #include <sys/mman.h>
100 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
101 (sizeof(void*) >= 8 \
102 ? 1 * 1024 * 1024 * 1024 \
103 : 32 * 1024 * 1024)
104
105 #endif /* NO_MMAP */
106
107 #define DEFAULT_PACKED_GIT_LIMIT \
108 (sizeof(void*) >= 8 \
109 ? 8 * 1024 * 1024 * 1024 \
110 : 256 * 1024 * 1024)
111
112 #ifdef NO_SETENV
113 #define setenv gitsetenv
114 extern int gitsetenv(const char *, const char *, int);
115 #endif
116
117 #ifdef NO_UNSETENV
118 #define unsetenv gitunsetenv
119 extern void gitunsetenv(const char *);
120 #endif
121
122 #ifdef NO_STRCASESTR
123 #define strcasestr gitstrcasestr
124 extern char *gitstrcasestr(const char *haystack, const char *needle);
125 #endif
126
127 #ifdef NO_STRLCPY
128 #define strlcpy gitstrlcpy
129 extern size_t gitstrlcpy(char *, const char *, size_t);
130 #endif
131
132 extern void release_pack_memory(size_t);
133
134 static inline char* xstrdup(const char *str)
135 {
136 char *ret = strdup(str);
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 }
143 return ret;
144 }
145
146 static inline void *xmalloc(size_t size)
147 {
148 void *ret = malloc(size);
149 if (!ret && !size)
150 ret = malloc(1);
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 }
159 #ifdef XMALLOC_POISON
160 memset(ret, 0xA5, size);
161 #endif
162 return ret;
163 }
164
165 static inline void *xrealloc(void *ptr, size_t size)
166 {
167 void *ret = realloc(ptr, size);
168 if (!ret && !size)
169 ret = realloc(ptr, 1);
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 }
178 return ret;
179 }
180
181 static inline void *xcalloc(size_t nmemb, size_t size)
182 {
183 void *ret = calloc(nmemb, size);
184 if (!ret && (!nmemb || !size))
185 ret = calloc(1, 1);
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 }
194 return ret;
195 }
196
197 static 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
210 static 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
221 static 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
232 static inline int has_extension(const char *filename, const char *ext)
233 {
234 size_t len = strlen(filename);
235 size_t extlen = strlen(ext);
236 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
237 }
238
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
246 extern 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
258 static 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