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4050c0df JH |
1 | #ifndef GIT_COMPAT_UTIL_H |
2 | #define GIT_COMPAT_UTIL_H | |
3 | ||
b97e9116 MW |
4 | #define _FILE_OFFSET_BITS 64 |
5 | ||
8f1d2e6f JH |
6 | #ifndef FLEX_ARRAY |
7 | #if defined(__GNUC__) && (__GNUC__ < 3) | |
8 | #define FLEX_ARRAY 0 | |
9 | #else | |
10 | #define FLEX_ARRAY /* empty */ | |
11 | #endif | |
12 | #endif | |
13 | ||
b4f2a6ac JH |
14 | #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) |
15 | ||
8723f216 NP |
16 | #ifdef __GNUC__ |
17 | #define TYPEOF(x) (__typeof__(x)) | |
18 | #else | |
19 | #define TYPEOF(x) | |
20 | #endif | |
21 | ||
22 | #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits)))) | |
23 | ||
cf606e3d AW |
24 | /* Approximation of the length of the decimal representation of this type. */ |
25 | #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) | |
26 | ||
95ca1c6c | 27 | #if !defined(__APPLE__) && !defined(__FreeBSD__) |
85023577 JH |
28 | #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ |
29 | #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ | |
c902c9a6 | 30 | #endif |
fb952206 JR |
31 | #define _ALL_SOURCE 1 |
32 | #define _GNU_SOURCE 1 | |
33 | #define _BSD_SOURCE 1 | |
85023577 | 34 | |
4050c0df JH |
35 | #include <unistd.h> |
36 | #include <stdio.h> | |
37 | #include <sys/stat.h> | |
38 | #include <fcntl.h> | |
39 | #include <stddef.h> | |
40 | #include <stdlib.h> | |
41 | #include <stdarg.h> | |
42 | #include <string.h> | |
43 | #include <errno.h> | |
44 | #include <limits.h> | |
45 | #include <sys/param.h> | |
4050c0df JH |
46 | #include <sys/types.h> |
47 | #include <dirent.h> | |
85023577 JH |
48 | #include <sys/time.h> |
49 | #include <time.h> | |
50 | #include <signal.h> | |
51 | #include <sys/wait.h> | |
52 | #include <fnmatch.h> | |
53 | #include <sys/poll.h> | |
54 | #include <sys/socket.h> | |
55 | #include <assert.h> | |
56 | #include <regex.h> | |
57 | #include <netinet/in.h> | |
58 | #include <netinet/tcp.h> | |
59 | #include <arpa/inet.h> | |
60 | #include <netdb.h> | |
61 | #include <pwd.h> | |
007e2ba6 | 62 | #include <inttypes.h> |
41b20017 RJ |
63 | #if defined(__CYGWIN__) |
64 | #undef _XOPEN_SOURCE | |
65 | #include <grp.h> | |
66 | #define _XOPEN_SOURCE 600 | |
67 | #else | |
fb952206 | 68 | #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ |
85023577 | 69 | #include <grp.h> |
fb952206 | 70 | #define _ALL_SOURCE 1 |
41b20017 | 71 | #endif |
85023577 JH |
72 | |
73 | #ifndef NO_ICONV | |
74 | #include <iconv.h> | |
75 | #endif | |
4050c0df | 76 | |
d0c2449f JH |
77 | /* On most systems <limits.h> would have given us this, but |
78 | * not on some systems (e.g. GNU/Hurd). | |
79 | */ | |
80 | #ifndef PATH_MAX | |
81 | #define PATH_MAX 4096 | |
82 | #endif | |
83 | ||
c4001d92 SP |
84 | #ifndef PRIuMAX |
85 | #define PRIuMAX "llu" | |
86 | #endif | |
87 | ||
4050c0df JH |
88 | #ifdef __GNUC__ |
89 | #define NORETURN __attribute__((__noreturn__)) | |
90 | #else | |
91 | #define NORETURN | |
92 | #ifndef __attribute__ | |
93 | #define __attribute__(x) | |
94 | #endif | |
95 | #endif | |
96 | ||
97 | /* General helper functions */ | |
98 | extern void usage(const char *err) NORETURN; | |
99 | extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); | |
100 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
46efd2d9 | 101 | extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); |
4050c0df | 102 | |
39a3f5ea PB |
103 | extern void set_usage_routine(void (*routine)(const char *err) NORETURN); |
104 | extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); | |
105 | extern void set_error_routine(void (*routine)(const char *err, va_list params)); | |
fa39b6b5 | 106 | extern void set_warn_routine(void (*routine)(const char *warn, va_list params)); |
39a3f5ea | 107 | |
4050c0df JH |
108 | #ifdef NO_MMAP |
109 | ||
110 | #ifndef PROT_READ | |
111 | #define PROT_READ 1 | |
112 | #define PROT_WRITE 2 | |
113 | #define MAP_PRIVATE 1 | |
114 | #define MAP_FAILED ((void*)-1) | |
115 | #endif | |
116 | ||
d6779124 SP |
117 | #define mmap git_mmap |
118 | #define munmap git_munmap | |
119 | extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
120 | extern int git_munmap(void *start, size_t length); | |
4050c0df | 121 | |
5faaf246 | 122 | /* This value must be multiple of (pagesize * 2) */ |
8c82534d SP |
123 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) |
124 | ||
4050c0df JH |
125 | #else /* NO_MMAP */ |
126 | ||
127 | #include <sys/mman.h> | |
5faaf246 JH |
128 | |
129 | /* This value must be multiple of (pagesize * 2) */ | |
22bac0ea SP |
130 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ |
131 | (sizeof(void*) >= 8 \ | |
132 | ? 1 * 1024 * 1024 * 1024 \ | |
133 | : 32 * 1024 * 1024) | |
4050c0df JH |
134 | |
135 | #endif /* NO_MMAP */ | |
136 | ||
22bac0ea | 137 | #define DEFAULT_PACKED_GIT_LIMIT \ |
ecaebf4a | 138 | ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) |
8c82534d | 139 | |
6900679c SH |
140 | #ifdef NO_PREAD |
141 | #define pread git_pread | |
142 | extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); | |
143 | #endif | |
144 | ||
4050c0df JH |
145 | #ifdef NO_SETENV |
146 | #define setenv gitsetenv | |
147 | extern int gitsetenv(const char *, const char *, int); | |
148 | #endif | |
149 | ||
731043fd JR |
150 | #ifdef NO_UNSETENV |
151 | #define unsetenv gitunsetenv | |
152 | extern void gitunsetenv(const char *); | |
153 | #endif | |
154 | ||
4050c0df JH |
155 | #ifdef NO_STRCASESTR |
156 | #define strcasestr gitstrcasestr | |
157 | extern char *gitstrcasestr(const char *haystack, const char *needle); | |
158 | #endif | |
159 | ||
817151e6 PE |
160 | #ifdef NO_STRLCPY |
161 | #define strlcpy gitstrlcpy | |
162 | extern size_t gitstrlcpy(char *, const char *, size_t); | |
163 | #endif | |
164 | ||
bc6b4f52 JR |
165 | #ifdef NO_STRTOUMAX |
166 | #define strtoumax gitstrtoumax | |
167 | extern uintmax_t gitstrtoumax(const char *, char **, int); | |
168 | #endif | |
169 | ||
fa0c87c3 AR |
170 | #ifdef NO_HSTRERROR |
171 | #define hstrerror githstrerror | |
172 | extern const char *githstrerror(int herror); | |
173 | #endif | |
174 | ||
d1efefa4 | 175 | extern void release_pack_memory(size_t, int); |
97bfeb34 | 176 | |
9befac47 SP |
177 | static inline char* xstrdup(const char *str) |
178 | { | |
179 | char *ret = strdup(str); | |
97bfeb34 | 180 | if (!ret) { |
d1efefa4 | 181 | release_pack_memory(strlen(str) + 1, -1); |
97bfeb34 SP |
182 | ret = strdup(str); |
183 | if (!ret) | |
184 | die("Out of memory, strdup failed"); | |
185 | } | |
9befac47 SP |
186 | return ret; |
187 | } | |
188 | ||
4050c0df JH |
189 | static inline void *xmalloc(size_t size) |
190 | { | |
191 | void *ret = malloc(size); | |
4e7a2ecc JH |
192 | if (!ret && !size) |
193 | ret = malloc(1); | |
97bfeb34 | 194 | if (!ret) { |
d1efefa4 | 195 | release_pack_memory(size, -1); |
97bfeb34 SP |
196 | ret = malloc(size); |
197 | if (!ret && !size) | |
198 | ret = malloc(1); | |
199 | if (!ret) | |
200 | die("Out of memory, malloc failed"); | |
201 | } | |
aa5481c1 JH |
202 | #ifdef XMALLOC_POISON |
203 | memset(ret, 0xA5, size); | |
204 | #endif | |
4050c0df JH |
205 | return ret; |
206 | } | |
207 | ||
5094102e DB |
208 | static inline char *xstrndup(const char *str, size_t len) |
209 | { | |
210 | char *p; | |
211 | ||
212 | p = memchr(str, '\0', len); | |
213 | if (p) | |
214 | len = p - str; | |
215 | p = xmalloc(len + 1); | |
216 | memcpy(p, str, len); | |
217 | p[len] = '\0'; | |
218 | return p; | |
219 | } | |
220 | ||
4050c0df JH |
221 | static inline void *xrealloc(void *ptr, size_t size) |
222 | { | |
223 | void *ret = realloc(ptr, size); | |
4e7a2ecc JH |
224 | if (!ret && !size) |
225 | ret = realloc(ptr, 1); | |
97bfeb34 | 226 | if (!ret) { |
d1efefa4 | 227 | release_pack_memory(size, -1); |
97bfeb34 SP |
228 | ret = realloc(ptr, size); |
229 | if (!ret && !size) | |
230 | ret = realloc(ptr, 1); | |
231 | if (!ret) | |
232 | die("Out of memory, realloc failed"); | |
233 | } | |
4050c0df JH |
234 | return ret; |
235 | } | |
236 | ||
237 | static inline void *xcalloc(size_t nmemb, size_t size) | |
238 | { | |
239 | void *ret = calloc(nmemb, size); | |
4e7a2ecc JH |
240 | if (!ret && (!nmemb || !size)) |
241 | ret = calloc(1, 1); | |
97bfeb34 | 242 | if (!ret) { |
d1efefa4 | 243 | release_pack_memory(nmemb * size, -1); |
97bfeb34 SP |
244 | ret = calloc(nmemb, size); |
245 | if (!ret && (!nmemb || !size)) | |
246 | ret = calloc(1, 1); | |
247 | if (!ret) | |
248 | die("Out of memory, calloc failed"); | |
249 | } | |
4050c0df JH |
250 | return ret; |
251 | } | |
252 | ||
c4712e45 SP |
253 | static inline void *xmmap(void *start, size_t length, |
254 | int prot, int flags, int fd, off_t offset) | |
255 | { | |
256 | void *ret = mmap(start, length, prot, flags, fd, offset); | |
257 | if (ret == MAP_FAILED) { | |
9130ac1e LT |
258 | if (!length) |
259 | return NULL; | |
d1efefa4 | 260 | release_pack_memory(length, fd); |
c4712e45 SP |
261 | ret = mmap(start, length, prot, flags, fd, offset); |
262 | if (ret == MAP_FAILED) | |
263 | die("Out of memory? mmap failed: %s", strerror(errno)); | |
264 | } | |
265 | return ret; | |
266 | } | |
267 | ||
1c15afb9 JH |
268 | static inline ssize_t xread(int fd, void *buf, size_t len) |
269 | { | |
270 | ssize_t nr; | |
271 | while (1) { | |
272 | nr = read(fd, buf, len); | |
273 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) | |
274 | continue; | |
275 | return nr; | |
276 | } | |
277 | } | |
278 | ||
279 | static inline ssize_t xwrite(int fd, const void *buf, size_t len) | |
280 | { | |
281 | ssize_t nr; | |
282 | while (1) { | |
283 | nr = write(fd, buf, len); | |
284 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) | |
285 | continue; | |
286 | return nr; | |
287 | } | |
288 | } | |
289 | ||
f5788250 JM |
290 | static inline int xdup(int fd) |
291 | { | |
292 | int ret = dup(fd); | |
293 | if (ret < 0) | |
294 | die("dup failed: %s", strerror(errno)); | |
295 | return ret; | |
296 | } | |
297 | ||
298 | static inline FILE *xfdopen(int fd, const char *mode) | |
299 | { | |
300 | FILE *stream = fdopen(fd, mode); | |
301 | if (stream == NULL) | |
302 | die("Out of memory? fdopen failed: %s", strerror(errno)); | |
303 | return stream; | |
304 | } | |
305 | ||
dc49cd76 SP |
306 | static inline size_t xsize_t(off_t len) |
307 | { | |
308 | return (size_t)len; | |
309 | } | |
310 | ||
5bb1cda5 | 311 | static inline int has_extension(const char *filename, const char *ext) |
83a2b841 | 312 | { |
5bb1cda5 RS |
313 | size_t len = strlen(filename); |
314 | size_t extlen = strlen(ext); | |
83a2b841 RS |
315 | return len > extlen && !memcmp(filename + len - extlen, ext, extlen); |
316 | } | |
317 | ||
4050c0df JH |
318 | /* Sane ctype - no locale, and works with signed chars */ |
319 | #undef isspace | |
320 | #undef isdigit | |
321 | #undef isalpha | |
322 | #undef isalnum | |
323 | #undef tolower | |
324 | #undef toupper | |
325 | extern unsigned char sane_ctype[256]; | |
326 | #define GIT_SPACE 0x01 | |
327 | #define GIT_DIGIT 0x02 | |
328 | #define GIT_ALPHA 0x04 | |
329 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | |
330 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
331 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
332 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
333 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
334 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
335 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
336 | ||
337 | static inline int sane_case(int x, int high) | |
338 | { | |
339 | if (sane_istest(x, GIT_ALPHA)) | |
340 | x = (x & ~0x20) | high; | |
341 | return x; | |
342 | } | |
343 | ||
cff0302c JH |
344 | static inline int prefixcmp(const char *str, const char *prefix) |
345 | { | |
346 | return strncmp(str, prefix, strlen(prefix)); | |
347 | } | |
348 | ||
6aead43d JM |
349 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) |
350 | { | |
351 | unsigned long ul; | |
352 | char *p; | |
353 | ||
354 | errno = 0; | |
355 | ul = strtoul(s, &p, base); | |
356 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
357 | return -1; | |
358 | *result = ul; | |
359 | return 0; | |
360 | } | |
361 | ||
4050c0df | 362 | #endif |