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Commit | Line | Data |
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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 | 6 | #ifndef FLEX_ARRAY |
8e973991 JH |
7 | /* |
8 | * See if our compiler is known to support flexible array members. | |
9 | */ | |
10 | #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) | |
11 | # define FLEX_ARRAY /* empty */ | |
12 | #elif defined(__GNUC__) | |
13 | # if (__GNUC__ >= 3) | |
14 | # define FLEX_ARRAY /* empty */ | |
15 | # else | |
16 | # define FLEX_ARRAY 0 /* older GNU extension */ | |
17 | # endif | |
18 | #endif | |
19 | ||
20 | /* | |
21 | * Otherwise, default to safer but a bit wasteful traditional style | |
22 | */ | |
23 | #ifndef FLEX_ARRAY | |
24 | # define FLEX_ARRAY 1 | |
8f1d2e6f JH |
25 | #endif |
26 | #endif | |
27 | ||
b4f2a6ac JH |
28 | #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) |
29 | ||
8723f216 NP |
30 | #ifdef __GNUC__ |
31 | #define TYPEOF(x) (__typeof__(x)) | |
32 | #else | |
33 | #define TYPEOF(x) | |
34 | #endif | |
35 | ||
36 | #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits)))) | |
db7244bd | 37 | #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ |
8723f216 | 38 | |
cf606e3d AW |
39 | /* Approximation of the length of the decimal representation of this type. */ |
40 | #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) | |
41 | ||
95ca1c6c | 42 | #if !defined(__APPLE__) && !defined(__FreeBSD__) |
85023577 JH |
43 | #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ |
44 | #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ | |
c902c9a6 | 45 | #endif |
fb952206 JR |
46 | #define _ALL_SOURCE 1 |
47 | #define _GNU_SOURCE 1 | |
48 | #define _BSD_SOURCE 1 | |
85023577 | 49 | |
4050c0df JH |
50 | #include <unistd.h> |
51 | #include <stdio.h> | |
52 | #include <sys/stat.h> | |
53 | #include <fcntl.h> | |
54 | #include <stddef.h> | |
55 | #include <stdlib.h> | |
56 | #include <stdarg.h> | |
57 | #include <string.h> | |
58 | #include <errno.h> | |
59 | #include <limits.h> | |
60 | #include <sys/param.h> | |
4050c0df JH |
61 | #include <sys/types.h> |
62 | #include <dirent.h> | |
85023577 JH |
63 | #include <sys/time.h> |
64 | #include <time.h> | |
65 | #include <signal.h> | |
66 | #include <sys/wait.h> | |
67 | #include <fnmatch.h> | |
68 | #include <sys/poll.h> | |
69 | #include <sys/socket.h> | |
80bbe72b | 70 | #include <sys/ioctl.h> |
2600973f | 71 | #ifndef NO_SYS_SELECT_H |
80bbe72b | 72 | #include <sys/select.h> |
2600973f | 73 | #endif |
85023577 JH |
74 | #include <assert.h> |
75 | #include <regex.h> | |
76 | #include <netinet/in.h> | |
77 | #include <netinet/tcp.h> | |
78 | #include <arpa/inet.h> | |
79 | #include <netdb.h> | |
80 | #include <pwd.h> | |
007e2ba6 | 81 | #include <inttypes.h> |
41b20017 RJ |
82 | #if defined(__CYGWIN__) |
83 | #undef _XOPEN_SOURCE | |
84 | #include <grp.h> | |
85 | #define _XOPEN_SOURCE 600 | |
86 | #else | |
fb952206 | 87 | #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ |
85023577 | 88 | #include <grp.h> |
fb952206 | 89 | #define _ALL_SOURCE 1 |
41b20017 | 90 | #endif |
85023577 JH |
91 | |
92 | #ifndef NO_ICONV | |
93 | #include <iconv.h> | |
94 | #endif | |
4050c0df | 95 | |
d0c2449f JH |
96 | /* On most systems <limits.h> would have given us this, but |
97 | * not on some systems (e.g. GNU/Hurd). | |
98 | */ | |
99 | #ifndef PATH_MAX | |
100 | #define PATH_MAX 4096 | |
101 | #endif | |
102 | ||
c4001d92 SP |
103 | #ifndef PRIuMAX |
104 | #define PRIuMAX "llu" | |
105 | #endif | |
106 | ||
4050c0df JH |
107 | #ifdef __GNUC__ |
108 | #define NORETURN __attribute__((__noreturn__)) | |
109 | #else | |
110 | #define NORETURN | |
111 | #ifndef __attribute__ | |
112 | #define __attribute__(x) | |
113 | #endif | |
114 | #endif | |
115 | ||
116 | /* General helper functions */ | |
117 | extern void usage(const char *err) NORETURN; | |
118 | extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); | |
119 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
46efd2d9 | 120 | extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); |
4050c0df | 121 | |
39a3f5ea PB |
122 | extern void set_usage_routine(void (*routine)(const char *err) NORETURN); |
123 | extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); | |
124 | extern void set_error_routine(void (*routine)(const char *err, va_list params)); | |
fa39b6b5 | 125 | extern void set_warn_routine(void (*routine)(const char *warn, va_list params)); |
39a3f5ea | 126 | |
698a68be JH |
127 | extern int prefixcmp(const char *str, const char *prefix); |
128 | ||
4050c0df JH |
129 | #ifdef NO_MMAP |
130 | ||
131 | #ifndef PROT_READ | |
132 | #define PROT_READ 1 | |
133 | #define PROT_WRITE 2 | |
134 | #define MAP_PRIVATE 1 | |
135 | #define MAP_FAILED ((void*)-1) | |
136 | #endif | |
137 | ||
d6779124 SP |
138 | #define mmap git_mmap |
139 | #define munmap git_munmap | |
140 | extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
141 | extern int git_munmap(void *start, size_t length); | |
4050c0df | 142 | |
5faaf246 | 143 | /* This value must be multiple of (pagesize * 2) */ |
8c82534d SP |
144 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) |
145 | ||
4050c0df JH |
146 | #else /* NO_MMAP */ |
147 | ||
148 | #include <sys/mman.h> | |
5faaf246 JH |
149 | |
150 | /* This value must be multiple of (pagesize * 2) */ | |
22bac0ea SP |
151 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ |
152 | (sizeof(void*) >= 8 \ | |
153 | ? 1 * 1024 * 1024 * 1024 \ | |
154 | : 32 * 1024 * 1024) | |
4050c0df JH |
155 | |
156 | #endif /* NO_MMAP */ | |
157 | ||
22bac0ea | 158 | #define DEFAULT_PACKED_GIT_LIMIT \ |
ecaebf4a | 159 | ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) |
8c82534d | 160 | |
6900679c SH |
161 | #ifdef NO_PREAD |
162 | #define pread git_pread | |
163 | extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); | |
164 | #endif | |
165 | ||
4050c0df JH |
166 | #ifdef NO_SETENV |
167 | #define setenv gitsetenv | |
168 | extern int gitsetenv(const char *, const char *, int); | |
169 | #endif | |
170 | ||
ca5bb5d5 SP |
171 | #ifdef NO_MKDTEMP |
172 | #define mkdtemp gitmkdtemp | |
173 | extern char *gitmkdtemp(char *); | |
174 | #endif | |
175 | ||
731043fd JR |
176 | #ifdef NO_UNSETENV |
177 | #define unsetenv gitunsetenv | |
178 | extern void gitunsetenv(const char *); | |
179 | #endif | |
180 | ||
4050c0df JH |
181 | #ifdef NO_STRCASESTR |
182 | #define strcasestr gitstrcasestr | |
183 | extern char *gitstrcasestr(const char *haystack, const char *needle); | |
184 | #endif | |
185 | ||
817151e6 PE |
186 | #ifdef NO_STRLCPY |
187 | #define strlcpy gitstrlcpy | |
188 | extern size_t gitstrlcpy(char *, const char *, size_t); | |
189 | #endif | |
190 | ||
bc6b4f52 JR |
191 | #ifdef NO_STRTOUMAX |
192 | #define strtoumax gitstrtoumax | |
193 | extern uintmax_t gitstrtoumax(const char *, char **, int); | |
194 | #endif | |
195 | ||
fa0c87c3 AR |
196 | #ifdef NO_HSTRERROR |
197 | #define hstrerror githstrerror | |
198 | extern const char *githstrerror(int herror); | |
199 | #endif | |
200 | ||
b21b9f1d RS |
201 | #ifdef NO_MEMMEM |
202 | #define memmem gitmemmem | |
203 | void *gitmemmem(const void *haystack, size_t haystacklen, | |
204 | const void *needle, size_t needlelen); | |
205 | #endif | |
206 | ||
726c8ef5 JS |
207 | #ifdef __GLIBC_PREREQ |
208 | #if __GLIBC_PREREQ(2, 1) | |
209 | #define HAVE_STRCHRNUL | |
210 | #endif | |
211 | #endif | |
212 | ||
213 | #ifndef HAVE_STRCHRNUL | |
659c69cf | 214 | #define strchrnul gitstrchrnul |
9e79f00f AE |
215 | static inline char *gitstrchrnul(const char *s, int c) |
216 | { | |
217 | while (*s && *s != c) | |
218 | s++; | |
219 | return (char *)s; | |
220 | } | |
659c69cf RS |
221 | #endif |
222 | ||
d1efefa4 | 223 | extern void release_pack_memory(size_t, int); |
97bfeb34 | 224 | |
9befac47 SP |
225 | static inline char* xstrdup(const char *str) |
226 | { | |
227 | char *ret = strdup(str); | |
97bfeb34 | 228 | if (!ret) { |
d1efefa4 | 229 | release_pack_memory(strlen(str) + 1, -1); |
97bfeb34 SP |
230 | ret = strdup(str); |
231 | if (!ret) | |
232 | die("Out of memory, strdup failed"); | |
233 | } | |
9befac47 SP |
234 | return ret; |
235 | } | |
236 | ||
4050c0df JH |
237 | static inline void *xmalloc(size_t size) |
238 | { | |
239 | void *ret = malloc(size); | |
4e7a2ecc JH |
240 | if (!ret && !size) |
241 | ret = malloc(1); | |
97bfeb34 | 242 | if (!ret) { |
d1efefa4 | 243 | release_pack_memory(size, -1); |
97bfeb34 SP |
244 | ret = malloc(size); |
245 | if (!ret && !size) | |
246 | ret = malloc(1); | |
247 | if (!ret) | |
248 | die("Out of memory, malloc failed"); | |
249 | } | |
aa5481c1 JH |
250 | #ifdef XMALLOC_POISON |
251 | memset(ret, 0xA5, size); | |
252 | #endif | |
4050c0df JH |
253 | return ret; |
254 | } | |
255 | ||
68d3025a | 256 | static inline void *xmemdupz(const void *data, size_t len) |
5094102e | 257 | { |
68d3025a PH |
258 | char *p = xmalloc(len + 1); |
259 | memcpy(p, data, len); | |
5094102e DB |
260 | p[len] = '\0'; |
261 | return p; | |
262 | } | |
263 | ||
68d3025a PH |
264 | static inline char *xstrndup(const char *str, size_t len) |
265 | { | |
266 | char *p = memchr(str, '\0', len); | |
267 | return xmemdupz(str, p ? p - str : len); | |
268 | } | |
269 | ||
4050c0df JH |
270 | static inline void *xrealloc(void *ptr, size_t size) |
271 | { | |
272 | void *ret = realloc(ptr, size); | |
4e7a2ecc JH |
273 | if (!ret && !size) |
274 | ret = realloc(ptr, 1); | |
97bfeb34 | 275 | if (!ret) { |
d1efefa4 | 276 | release_pack_memory(size, -1); |
97bfeb34 SP |
277 | ret = realloc(ptr, size); |
278 | if (!ret && !size) | |
279 | ret = realloc(ptr, 1); | |
280 | if (!ret) | |
281 | die("Out of memory, realloc failed"); | |
282 | } | |
4050c0df JH |
283 | return ret; |
284 | } | |
285 | ||
286 | static inline void *xcalloc(size_t nmemb, size_t size) | |
287 | { | |
288 | void *ret = calloc(nmemb, size); | |
4e7a2ecc JH |
289 | if (!ret && (!nmemb || !size)) |
290 | ret = calloc(1, 1); | |
97bfeb34 | 291 | if (!ret) { |
d1efefa4 | 292 | release_pack_memory(nmemb * size, -1); |
97bfeb34 SP |
293 | ret = calloc(nmemb, size); |
294 | if (!ret && (!nmemb || !size)) | |
295 | ret = calloc(1, 1); | |
296 | if (!ret) | |
297 | die("Out of memory, calloc failed"); | |
298 | } | |
4050c0df JH |
299 | return ret; |
300 | } | |
301 | ||
c4712e45 SP |
302 | static inline void *xmmap(void *start, size_t length, |
303 | int prot, int flags, int fd, off_t offset) | |
304 | { | |
305 | void *ret = mmap(start, length, prot, flags, fd, offset); | |
306 | if (ret == MAP_FAILED) { | |
9130ac1e LT |
307 | if (!length) |
308 | return NULL; | |
d1efefa4 | 309 | release_pack_memory(length, fd); |
c4712e45 SP |
310 | ret = mmap(start, length, prot, flags, fd, offset); |
311 | if (ret == MAP_FAILED) | |
312 | die("Out of memory? mmap failed: %s", strerror(errno)); | |
313 | } | |
314 | return ret; | |
315 | } | |
316 | ||
1c15afb9 JH |
317 | static inline ssize_t xread(int fd, void *buf, size_t len) |
318 | { | |
319 | ssize_t nr; | |
320 | while (1) { | |
321 | nr = read(fd, buf, len); | |
322 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) | |
323 | continue; | |
324 | return nr; | |
325 | } | |
326 | } | |
327 | ||
328 | static inline ssize_t xwrite(int fd, const void *buf, size_t len) | |
329 | { | |
330 | ssize_t nr; | |
331 | while (1) { | |
332 | nr = write(fd, buf, len); | |
333 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) | |
334 | continue; | |
335 | return nr; | |
336 | } | |
337 | } | |
338 | ||
f5788250 JM |
339 | static inline int xdup(int fd) |
340 | { | |
341 | int ret = dup(fd); | |
342 | if (ret < 0) | |
343 | die("dup failed: %s", strerror(errno)); | |
344 | return ret; | |
345 | } | |
346 | ||
347 | static inline FILE *xfdopen(int fd, const char *mode) | |
348 | { | |
349 | FILE *stream = fdopen(fd, mode); | |
350 | if (stream == NULL) | |
351 | die("Out of memory? fdopen failed: %s", strerror(errno)); | |
352 | return stream; | |
353 | } | |
354 | ||
f21a47b2 LFC |
355 | static inline int xmkstemp(char *template) |
356 | { | |
357 | int fd; | |
358 | ||
359 | fd = mkstemp(template); | |
360 | if (fd < 0) | |
361 | die("Unable to create temporary file: %s", strerror(errno)); | |
362 | return fd; | |
363 | } | |
364 | ||
dc49cd76 SP |
365 | static inline size_t xsize_t(off_t len) |
366 | { | |
367 | return (size_t)len; | |
368 | } | |
369 | ||
5bb1cda5 | 370 | static inline int has_extension(const char *filename, const char *ext) |
83a2b841 | 371 | { |
5bb1cda5 RS |
372 | size_t len = strlen(filename); |
373 | size_t extlen = strlen(ext); | |
83a2b841 RS |
374 | return len > extlen && !memcmp(filename + len - extlen, ext, extlen); |
375 | } | |
376 | ||
4050c0df JH |
377 | /* Sane ctype - no locale, and works with signed chars */ |
378 | #undef isspace | |
379 | #undef isdigit | |
380 | #undef isalpha | |
381 | #undef isalnum | |
382 | #undef tolower | |
383 | #undef toupper | |
384 | extern unsigned char sane_ctype[256]; | |
385 | #define GIT_SPACE 0x01 | |
386 | #define GIT_DIGIT 0x02 | |
387 | #define GIT_ALPHA 0x04 | |
388 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | |
389 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
390 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
391 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
392 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
393 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
394 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
395 | ||
396 | static inline int sane_case(int x, int high) | |
397 | { | |
398 | if (sane_istest(x, GIT_ALPHA)) | |
399 | x = (x & ~0x20) | high; | |
400 | return x; | |
401 | } | |
402 | ||
6aead43d JM |
403 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) |
404 | { | |
405 | unsigned long ul; | |
406 | char *p; | |
407 | ||
408 | errno = 0; | |
409 | ul = strtoul(s, &p, base); | |
410 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
411 | return -1; | |
412 | *result = ul; | |
413 | return 0; | |
414 | } | |
415 | ||
7791ecbc JH |
416 | static inline int strtol_i(char const *s, int base, int *result) |
417 | { | |
418 | long ul; | |
419 | char *p; | |
420 | ||
421 | errno = 0; | |
422 | ul = strtol(s, &p, base); | |
423 | if (errno || *p || p == s || (int) ul != ul) | |
424 | return -1; | |
425 | *result = ul; | |
426 | return 0; | |
427 | } | |
428 | ||
4050c0df | 429 | #endif |