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1 | #ifndef GIT_COMPAT_UTIL_H | |
2 | #define GIT_COMPAT_UTIL_H | |
3 | ||
4 | #define _FILE_OFFSET_BITS 64 | |
5 | ||
6 | ||
7 | /* Derived from Linux "Features Test Macro" header | |
8 | * Convenience macros to test the versions of gcc (or | |
9 | * a compatible compiler). | |
10 | * Use them like this: | |
11 | * #if GIT_GNUC_PREREQ (2,8) | |
12 | * ... code requiring gcc 2.8 or later ... | |
13 | * #endif | |
14 | */ | |
15 | #if defined(__GNUC__) && defined(__GNUC_MINOR__) | |
16 | # define GIT_GNUC_PREREQ(maj, min) \ | |
17 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | |
18 | #else | |
19 | #define GIT_GNUC_PREREQ(maj, min) 0 | |
20 | #endif | |
21 | ||
22 | ||
23 | #ifndef FLEX_ARRAY | |
24 | /* | |
25 | * See if our compiler is known to support flexible array members. | |
26 | */ | |
27 | #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580)) | |
28 | # define FLEX_ARRAY /* empty */ | |
29 | #elif defined(__GNUC__) | |
30 | # if (__GNUC__ >= 3) | |
31 | # define FLEX_ARRAY /* empty */ | |
32 | # else | |
33 | # define FLEX_ARRAY 0 /* older GNU extension */ | |
34 | # endif | |
35 | #endif | |
36 | ||
37 | /* | |
38 | * Otherwise, default to safer but a bit wasteful traditional style | |
39 | */ | |
40 | #ifndef FLEX_ARRAY | |
41 | # define FLEX_ARRAY 1 | |
42 | #endif | |
43 | #endif | |
44 | ||
45 | ||
46 | /* | |
47 | * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression. | |
48 | * @cond: the compile-time condition which must be true. | |
49 | * | |
50 | * Your compile will fail if the condition isn't true, or can't be evaluated | |
51 | * by the compiler. This can be used in an expression: its value is "0". | |
52 | * | |
53 | * Example: | |
54 | * #define foo_to_char(foo) \ | |
55 | * ((char *)(foo) \ | |
56 | * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0)) | |
57 | */ | |
58 | #define BUILD_ASSERT_OR_ZERO(cond) \ | |
59 | (sizeof(char [1 - 2*!(cond)]) - 1) | |
60 | ||
61 | #if GIT_GNUC_PREREQ(3, 1) | |
62 | /* &arr[0] degrades to a pointer: a different type from an array */ | |
63 | # define BARF_UNLESS_AN_ARRAY(arr) \ | |
64 | BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \ | |
65 | __typeof__(&(arr)[0]))) | |
66 | #else | |
67 | # define BARF_UNLESS_AN_ARRAY(arr) 0 | |
68 | #endif | |
69 | /* | |
70 | * ARRAY_SIZE - get the number of elements in a visible array | |
71 | * <at> x: the array whose size you want. | |
72 | * | |
73 | * This does not work on pointers, or arrays declared as [], or | |
74 | * function parameters. With correct compiler support, such usage | |
75 | * will cause a build error (see the build_assert_or_zero macro). | |
76 | */ | |
77 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x)) | |
78 | ||
79 | #define bitsizeof(x) (CHAR_BIT * sizeof(x)) | |
80 | ||
81 | #define maximum_signed_value_of_type(a) \ | |
82 | (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a))) | |
83 | ||
84 | #define maximum_unsigned_value_of_type(a) \ | |
85 | (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a))) | |
86 | ||
87 | /* | |
88 | * Signed integer overflow is undefined in C, so here's a helper macro | |
89 | * to detect if the sum of two integers will overflow. | |
90 | * | |
91 | * Requires: a >= 0, typeof(a) equals typeof(b) | |
92 | */ | |
93 | #define signed_add_overflows(a, b) \ | |
94 | ((b) > maximum_signed_value_of_type(a) - (a)) | |
95 | ||
96 | #define unsigned_add_overflows(a, b) \ | |
97 | ((b) > maximum_unsigned_value_of_type(a) - (a)) | |
98 | ||
99 | /* | |
100 | * Returns true if the multiplication of "a" and "b" will | |
101 | * overflow. The types of "a" and "b" must match and must be unsigned. | |
102 | * Note that this macro evaluates "a" twice! | |
103 | */ | |
104 | #define unsigned_mult_overflows(a, b) \ | |
105 | ((a) && (b) > maximum_unsigned_value_of_type(a) / (a)) | |
106 | ||
107 | #ifdef __GNUC__ | |
108 | #define TYPEOF(x) (__typeof__(x)) | |
109 | #else | |
110 | #define TYPEOF(x) | |
111 | #endif | |
112 | ||
113 | #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits)))) | |
114 | #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ | |
115 | ||
116 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) | |
117 | ||
118 | /* Approximation of the length of the decimal representation of this type. */ | |
119 | #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) | |
120 | ||
121 | #if defined(__sun__) | |
122 | /* | |
123 | * On Solaris, when _XOPEN_EXTENDED is set, its header file | |
124 | * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE | |
125 | * setting to say we are XPG5 or XPG6. Also on Solaris, | |
126 | * XPG6 programs must be compiled with a c99 compiler, while | |
127 | * non XPG6 programs must be compiled with a pre-c99 compiler. | |
128 | */ | |
129 | # if __STDC_VERSION__ - 0 >= 199901L | |
130 | # define _XOPEN_SOURCE 600 | |
131 | # else | |
132 | # define _XOPEN_SOURCE 500 | |
133 | # endif | |
134 | #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ | |
135 | !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ | |
136 | !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ | |
137 | !defined(__CYGWIN__) | |
138 | #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ | |
139 | #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ | |
140 | #endif | |
141 | #define _ALL_SOURCE 1 | |
142 | #define _GNU_SOURCE 1 | |
143 | #define _BSD_SOURCE 1 | |
144 | #define _DEFAULT_SOURCE 1 | |
145 | #define _NETBSD_SOURCE 1 | |
146 | #define _SGI_SOURCE 1 | |
147 | ||
148 | #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ | |
149 | # if defined (_MSC_VER) && !defined(_WIN32_WINNT) | |
150 | # define _WIN32_WINNT 0x0502 | |
151 | # endif | |
152 | #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ | |
153 | #include <winsock2.h> | |
154 | #include <windows.h> | |
155 | #define GIT_WINDOWS_NATIVE | |
156 | #endif | |
157 | ||
158 | #include <unistd.h> | |
159 | #include <stdio.h> | |
160 | #include <sys/stat.h> | |
161 | #include <fcntl.h> | |
162 | #include <stddef.h> | |
163 | #include <stdlib.h> | |
164 | #include <stdarg.h> | |
165 | #include <string.h> | |
166 | #ifdef HAVE_STRINGS_H | |
167 | #include <strings.h> /* for strcasecmp() */ | |
168 | #endif | |
169 | #include <errno.h> | |
170 | #include <limits.h> | |
171 | #ifdef NEEDS_SYS_PARAM_H | |
172 | #include <sys/param.h> | |
173 | #endif | |
174 | #include <sys/types.h> | |
175 | #include <dirent.h> | |
176 | #include <sys/time.h> | |
177 | #include <time.h> | |
178 | #include <signal.h> | |
179 | #include <assert.h> | |
180 | #include <regex.h> | |
181 | #include <utime.h> | |
182 | #include <syslog.h> | |
183 | #ifndef NO_SYS_POLL_H | |
184 | #include <sys/poll.h> | |
185 | #else | |
186 | #include <poll.h> | |
187 | #endif | |
188 | #ifdef HAVE_BSD_SYSCTL | |
189 | #include <sys/sysctl.h> | |
190 | #endif | |
191 | ||
192 | #if defined(__MINGW32__) | |
193 | /* pull in Windows compatibility stuff */ | |
194 | #include "compat/mingw.h" | |
195 | #elif defined(_MSC_VER) | |
196 | #include "compat/msvc.h" | |
197 | #else | |
198 | #include <sys/utsname.h> | |
199 | #include <sys/wait.h> | |
200 | #include <sys/resource.h> | |
201 | #include <sys/socket.h> | |
202 | #include <sys/ioctl.h> | |
203 | #include <termios.h> | |
204 | #ifndef NO_SYS_SELECT_H | |
205 | #include <sys/select.h> | |
206 | #endif | |
207 | #include <netinet/in.h> | |
208 | #include <netinet/tcp.h> | |
209 | #include <arpa/inet.h> | |
210 | #include <netdb.h> | |
211 | #include <pwd.h> | |
212 | #include <sys/un.h> | |
213 | #ifndef NO_INTTYPES_H | |
214 | #include <inttypes.h> | |
215 | #else | |
216 | #include <stdint.h> | |
217 | #endif | |
218 | #ifdef NO_INTPTR_T | |
219 | /* | |
220 | * On I16LP32, ILP32 and LP64 "long" is the save bet, however | |
221 | * on LLP86, IL33LLP64 and P64 it needs to be "long long", | |
222 | * while on IP16 and IP16L32 it is "int" (resp. "short") | |
223 | * Size needs to match (or exceed) 'sizeof(void *)'. | |
224 | * We can't take "long long" here as not everybody has it. | |
225 | */ | |
226 | typedef long intptr_t; | |
227 | typedef unsigned long uintptr_t; | |
228 | #endif | |
229 | #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ | |
230 | #include <grp.h> | |
231 | #define _ALL_SOURCE 1 | |
232 | #endif | |
233 | ||
234 | /* used on Mac OS X */ | |
235 | #ifdef PRECOMPOSE_UNICODE | |
236 | #include "compat/precompose_utf8.h" | |
237 | #else | |
238 | #define precompose_str(in,i_nfd2nfc) | |
239 | #define precompose_argv(c,v) | |
240 | #define probe_utf8_pathname_composition() | |
241 | #endif | |
242 | ||
243 | #ifdef MKDIR_WO_TRAILING_SLASH | |
244 | #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) | |
245 | extern int compat_mkdir_wo_trailing_slash(const char*, mode_t); | |
246 | #endif | |
247 | ||
248 | #ifdef NO_STRUCT_ITIMERVAL | |
249 | struct itimerval { | |
250 | struct timeval it_interval; | |
251 | struct timeval it_value; | |
252 | }; | |
253 | #endif | |
254 | ||
255 | #ifdef NO_SETITIMER | |
256 | #define setitimer(which,value,ovalue) | |
257 | #endif | |
258 | ||
259 | #ifndef NO_LIBGEN_H | |
260 | #include <libgen.h> | |
261 | #else | |
262 | #define basename gitbasename | |
263 | extern char *gitbasename(char *); | |
264 | #define dirname gitdirname | |
265 | extern char *gitdirname(char *); | |
266 | #endif | |
267 | ||
268 | #ifndef NO_ICONV | |
269 | #include <iconv.h> | |
270 | #endif | |
271 | ||
272 | #ifndef NO_OPENSSL | |
273 | #ifdef __APPLE__ | |
274 | #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 | |
275 | #include <AvailabilityMacros.h> | |
276 | #undef DEPRECATED_ATTRIBUTE | |
277 | #define DEPRECATED_ATTRIBUTE | |
278 | #undef __AVAILABILITY_MACROS_USES_AVAILABILITY | |
279 | #endif | |
280 | #include <openssl/ssl.h> | |
281 | #include <openssl/err.h> | |
282 | #ifdef NO_HMAC_CTX_CLEANUP | |
283 | #define HMAC_CTX_cleanup HMAC_cleanup | |
284 | #endif | |
285 | #endif | |
286 | ||
287 | /* On most systems <netdb.h> would have given us this, but | |
288 | * not on some systems (e.g. z/OS). | |
289 | */ | |
290 | #ifndef NI_MAXHOST | |
291 | #define NI_MAXHOST 1025 | |
292 | #endif | |
293 | ||
294 | #ifndef NI_MAXSERV | |
295 | #define NI_MAXSERV 32 | |
296 | #endif | |
297 | ||
298 | /* On most systems <limits.h> would have given us this, but | |
299 | * not on some systems (e.g. GNU/Hurd). | |
300 | */ | |
301 | #ifndef PATH_MAX | |
302 | #define PATH_MAX 4096 | |
303 | #endif | |
304 | ||
305 | #ifndef PRIuMAX | |
306 | #define PRIuMAX "llu" | |
307 | #endif | |
308 | ||
309 | #ifndef SCNuMAX | |
310 | #define SCNuMAX PRIuMAX | |
311 | #endif | |
312 | ||
313 | #ifndef PRIu32 | |
314 | #define PRIu32 "u" | |
315 | #endif | |
316 | ||
317 | #ifndef PRIx32 | |
318 | #define PRIx32 "x" | |
319 | #endif | |
320 | ||
321 | #ifndef PRIo32 | |
322 | #define PRIo32 "o" | |
323 | #endif | |
324 | ||
325 | #ifndef PATH_SEP | |
326 | #define PATH_SEP ':' | |
327 | #endif | |
328 | ||
329 | #ifdef HAVE_PATHS_H | |
330 | #include <paths.h> | |
331 | #endif | |
332 | #ifndef _PATH_DEFPATH | |
333 | #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" | |
334 | #endif | |
335 | ||
336 | #ifndef STRIP_EXTENSION | |
337 | #define STRIP_EXTENSION "" | |
338 | #endif | |
339 | ||
340 | #ifndef has_dos_drive_prefix | |
341 | static inline int git_has_dos_drive_prefix(const char *path) | |
342 | { | |
343 | return 0; | |
344 | } | |
345 | #define has_dos_drive_prefix git_has_dos_drive_prefix | |
346 | #endif | |
347 | ||
348 | #ifndef skip_dos_drive_prefix | |
349 | static inline int git_skip_dos_drive_prefix(char **path) | |
350 | { | |
351 | return 0; | |
352 | } | |
353 | #define skip_dos_drive_prefix git_skip_dos_drive_prefix | |
354 | #endif | |
355 | ||
356 | #ifndef is_dir_sep | |
357 | static inline int git_is_dir_sep(int c) | |
358 | { | |
359 | return c == '/'; | |
360 | } | |
361 | #define is_dir_sep git_is_dir_sep | |
362 | #endif | |
363 | ||
364 | #ifndef offset_1st_component | |
365 | static inline int git_offset_1st_component(const char *path) | |
366 | { | |
367 | return is_dir_sep(path[0]); | |
368 | } | |
369 | #define offset_1st_component git_offset_1st_component | |
370 | #endif | |
371 | ||
372 | #ifndef find_last_dir_sep | |
373 | static inline char *git_find_last_dir_sep(const char *path) | |
374 | { | |
375 | return strrchr(path, '/'); | |
376 | } | |
377 | #define find_last_dir_sep git_find_last_dir_sep | |
378 | #endif | |
379 | ||
380 | #if defined(__HP_cc) && (__HP_cc >= 61000) | |
381 | #define NORETURN __attribute__((noreturn)) | |
382 | #define NORETURN_PTR | |
383 | #elif defined(__GNUC__) && !defined(NO_NORETURN) | |
384 | #define NORETURN __attribute__((__noreturn__)) | |
385 | #define NORETURN_PTR __attribute__((__noreturn__)) | |
386 | #elif defined(_MSC_VER) | |
387 | #define NORETURN __declspec(noreturn) | |
388 | #define NORETURN_PTR | |
389 | #else | |
390 | #define NORETURN | |
391 | #define NORETURN_PTR | |
392 | #ifndef __GNUC__ | |
393 | #ifndef __attribute__ | |
394 | #define __attribute__(x) | |
395 | #endif | |
396 | #endif | |
397 | #endif | |
398 | ||
399 | /* The sentinel attribute is valid from gcc version 4.0 */ | |
400 | #if defined(__GNUC__) && (__GNUC__ >= 4) | |
401 | #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) | |
402 | #else | |
403 | #define LAST_ARG_MUST_BE_NULL | |
404 | #endif | |
405 | ||
406 | #include "compat/bswap.h" | |
407 | ||
408 | #include "wildmatch.h" | |
409 | ||
410 | struct strbuf; | |
411 | ||
412 | /* General helper functions */ | |
413 | extern void vreportf(const char *prefix, const char *err, va_list params); | |
414 | extern NORETURN void usage(const char *err); | |
415 | extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
416 | extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
417 | extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
418 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
419 | extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
420 | ||
421 | #ifndef NO_OPENSSL | |
422 | #ifdef APPLE_COMMON_CRYPTO | |
423 | #include "compat/apple-common-crypto.h" | |
424 | #else | |
425 | #include <openssl/evp.h> | |
426 | #include <openssl/hmac.h> | |
427 | #endif /* APPLE_COMMON_CRYPTO */ | |
428 | #include <openssl/x509v3.h> | |
429 | #endif /* NO_OPENSSL */ | |
430 | ||
431 | /* | |
432 | * Let callers be aware of the constant return value; this can help | |
433 | * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, | |
434 | * because some compilers may not support variadic macros. Since we're only | |
435 | * trying to help gcc, anyway, it's OK; other compilers will fall back to | |
436 | * using the function as usual. | |
437 | */ | |
438 | #if defined(__GNUC__) | |
439 | static inline int const_error(void) | |
440 | { | |
441 | return -1; | |
442 | } | |
443 | #define error(...) (error(__VA_ARGS__), const_error()) | |
444 | #endif | |
445 | ||
446 | extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)); | |
447 | extern void set_error_routine(void (*routine)(const char *err, va_list params)); | |
448 | extern void set_die_is_recursing_routine(int (*routine)(void)); | |
449 | extern void set_error_handle(FILE *); | |
450 | ||
451 | extern int starts_with(const char *str, const char *prefix); | |
452 | ||
453 | /* | |
454 | * If the string "str" begins with the string found in "prefix", return 1. | |
455 | * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in | |
456 | * the string right after the prefix). | |
457 | * | |
458 | * Otherwise, return 0 and leave "out" untouched. | |
459 | * | |
460 | * Examples: | |
461 | * | |
462 | * [extract branch name, fail if not a branch] | |
463 | * if (!skip_prefix(ref, "refs/heads/", &branch) | |
464 | * return -1; | |
465 | * | |
466 | * [skip prefix if present, otherwise use whole string] | |
467 | * skip_prefix(name, "refs/heads/", &name); | |
468 | */ | |
469 | static inline int skip_prefix(const char *str, const char *prefix, | |
470 | const char **out) | |
471 | { | |
472 | do { | |
473 | if (!*prefix) { | |
474 | *out = str; | |
475 | return 1; | |
476 | } | |
477 | } while (*str++ == *prefix++); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | /* | |
482 | * If buf ends with suffix, return 1 and subtract the length of the suffix | |
483 | * from *len. Otherwise, return 0 and leave *len untouched. | |
484 | */ | |
485 | static inline int strip_suffix_mem(const char *buf, size_t *len, | |
486 | const char *suffix) | |
487 | { | |
488 | size_t suflen = strlen(suffix); | |
489 | if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) | |
490 | return 0; | |
491 | *len -= suflen; | |
492 | return 1; | |
493 | } | |
494 | ||
495 | /* | |
496 | * If str ends with suffix, return 1 and set *len to the size of the string | |
497 | * without the suffix. Otherwise, return 0 and set *len to the size of the | |
498 | * string. | |
499 | * | |
500 | * Note that we do _not_ NUL-terminate str to the new length. | |
501 | */ | |
502 | static inline int strip_suffix(const char *str, const char *suffix, size_t *len) | |
503 | { | |
504 | *len = strlen(str); | |
505 | return strip_suffix_mem(str, len, suffix); | |
506 | } | |
507 | ||
508 | static inline int ends_with(const char *str, const char *suffix) | |
509 | { | |
510 | size_t len; | |
511 | return strip_suffix(str, suffix, &len); | |
512 | } | |
513 | ||
514 | #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) | |
515 | ||
516 | #ifndef PROT_READ | |
517 | #define PROT_READ 1 | |
518 | #define PROT_WRITE 2 | |
519 | #define MAP_PRIVATE 1 | |
520 | #endif | |
521 | ||
522 | #define mmap git_mmap | |
523 | #define munmap git_munmap | |
524 | extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
525 | extern int git_munmap(void *start, size_t length); | |
526 | ||
527 | #else /* NO_MMAP || USE_WIN32_MMAP */ | |
528 | ||
529 | #include <sys/mman.h> | |
530 | ||
531 | #endif /* NO_MMAP || USE_WIN32_MMAP */ | |
532 | ||
533 | #ifdef NO_MMAP | |
534 | ||
535 | /* This value must be multiple of (pagesize * 2) */ | |
536 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) | |
537 | ||
538 | #else /* NO_MMAP */ | |
539 | ||
540 | /* This value must be multiple of (pagesize * 2) */ | |
541 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ | |
542 | (sizeof(void*) >= 8 \ | |
543 | ? 1 * 1024 * 1024 * 1024 \ | |
544 | : 32 * 1024 * 1024) | |
545 | ||
546 | #endif /* NO_MMAP */ | |
547 | ||
548 | #ifndef MAP_FAILED | |
549 | #define MAP_FAILED ((void *)-1) | |
550 | #endif | |
551 | ||
552 | #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT | |
553 | #define on_disk_bytes(st) ((st).st_size) | |
554 | #else | |
555 | #define on_disk_bytes(st) ((st).st_blocks * 512) | |
556 | #endif | |
557 | ||
558 | #ifdef NEEDS_MODE_TRANSLATION | |
559 | #undef S_IFMT | |
560 | #undef S_IFREG | |
561 | #undef S_IFDIR | |
562 | #undef S_IFLNK | |
563 | #undef S_IFBLK | |
564 | #undef S_IFCHR | |
565 | #undef S_IFIFO | |
566 | #undef S_IFSOCK | |
567 | #define S_IFMT 0170000 | |
568 | #define S_IFREG 0100000 | |
569 | #define S_IFDIR 0040000 | |
570 | #define S_IFLNK 0120000 | |
571 | #define S_IFBLK 0060000 | |
572 | #define S_IFCHR 0020000 | |
573 | #define S_IFIFO 0010000 | |
574 | #define S_IFSOCK 0140000 | |
575 | #ifdef stat | |
576 | #undef stat | |
577 | #endif | |
578 | #define stat(path, buf) git_stat(path, buf) | |
579 | extern int git_stat(const char *, struct stat *); | |
580 | #ifdef fstat | |
581 | #undef fstat | |
582 | #endif | |
583 | #define fstat(fd, buf) git_fstat(fd, buf) | |
584 | extern int git_fstat(int, struct stat *); | |
585 | #ifdef lstat | |
586 | #undef lstat | |
587 | #endif | |
588 | #define lstat(path, buf) git_lstat(path, buf) | |
589 | extern int git_lstat(const char *, struct stat *); | |
590 | #endif | |
591 | ||
592 | #define DEFAULT_PACKED_GIT_LIMIT \ | |
593 | ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? 8192 : 256)) | |
594 | ||
595 | #ifdef NO_PREAD | |
596 | #define pread git_pread | |
597 | extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); | |
598 | #endif | |
599 | /* | |
600 | * Forward decl that will remind us if its twin in cache.h changes. | |
601 | * This function is used in compat/pread.c. But we can't include | |
602 | * cache.h there. | |
603 | */ | |
604 | extern ssize_t read_in_full(int fd, void *buf, size_t count); | |
605 | ||
606 | #ifdef NO_SETENV | |
607 | #define setenv gitsetenv | |
608 | extern int gitsetenv(const char *, const char *, int); | |
609 | #endif | |
610 | ||
611 | #ifdef NO_MKDTEMP | |
612 | #define mkdtemp gitmkdtemp | |
613 | extern char *gitmkdtemp(char *); | |
614 | #endif | |
615 | ||
616 | #ifdef NO_MKSTEMPS | |
617 | #define mkstemps gitmkstemps | |
618 | extern int gitmkstemps(char *, int); | |
619 | #endif | |
620 | ||
621 | #ifdef NO_UNSETENV | |
622 | #define unsetenv gitunsetenv | |
623 | extern void gitunsetenv(const char *); | |
624 | #endif | |
625 | ||
626 | #ifdef NO_STRCASESTR | |
627 | #define strcasestr gitstrcasestr | |
628 | extern char *gitstrcasestr(const char *haystack, const char *needle); | |
629 | #endif | |
630 | ||
631 | #ifdef NO_STRLCPY | |
632 | #define strlcpy gitstrlcpy | |
633 | extern size_t gitstrlcpy(char *, const char *, size_t); | |
634 | #endif | |
635 | ||
636 | #ifdef NO_STRTOUMAX | |
637 | #define strtoumax gitstrtoumax | |
638 | extern uintmax_t gitstrtoumax(const char *, char **, int); | |
639 | #define strtoimax gitstrtoimax | |
640 | extern intmax_t gitstrtoimax(const char *, char **, int); | |
641 | #endif | |
642 | ||
643 | #ifdef NO_HSTRERROR | |
644 | #define hstrerror githstrerror | |
645 | extern const char *githstrerror(int herror); | |
646 | #endif | |
647 | ||
648 | #ifdef NO_MEMMEM | |
649 | #define memmem gitmemmem | |
650 | void *gitmemmem(const void *haystack, size_t haystacklen, | |
651 | const void *needle, size_t needlelen); | |
652 | #endif | |
653 | ||
654 | #ifdef NO_GETPAGESIZE | |
655 | #define getpagesize() sysconf(_SC_PAGESIZE) | |
656 | #endif | |
657 | ||
658 | #ifdef FREAD_READS_DIRECTORIES | |
659 | #ifdef fopen | |
660 | #undef fopen | |
661 | #endif | |
662 | #define fopen(a,b) git_fopen(a,b) | |
663 | extern FILE *git_fopen(const char*, const char*); | |
664 | #endif | |
665 | ||
666 | #ifdef SNPRINTF_RETURNS_BOGUS | |
667 | #ifdef snprintf | |
668 | #undef snprintf | |
669 | #endif | |
670 | #define snprintf git_snprintf | |
671 | extern int git_snprintf(char *str, size_t maxsize, | |
672 | const char *format, ...); | |
673 | #ifdef vsnprintf | |
674 | #undef vsnprintf | |
675 | #endif | |
676 | #define vsnprintf git_vsnprintf | |
677 | extern int git_vsnprintf(char *str, size_t maxsize, | |
678 | const char *format, va_list ap); | |
679 | #endif | |
680 | ||
681 | #ifdef __GLIBC_PREREQ | |
682 | #if __GLIBC_PREREQ(2, 1) | |
683 | #define HAVE_STRCHRNUL | |
684 | #endif | |
685 | #endif | |
686 | ||
687 | #ifndef HAVE_STRCHRNUL | |
688 | #define strchrnul gitstrchrnul | |
689 | static inline char *gitstrchrnul(const char *s, int c) | |
690 | { | |
691 | while (*s && *s != c) | |
692 | s++; | |
693 | return (char *)s; | |
694 | } | |
695 | #endif | |
696 | ||
697 | #ifdef NO_INET_PTON | |
698 | int inet_pton(int af, const char *src, void *dst); | |
699 | #endif | |
700 | ||
701 | #ifdef NO_INET_NTOP | |
702 | const char *inet_ntop(int af, const void *src, char *dst, size_t size); | |
703 | #endif | |
704 | ||
705 | #ifdef NO_PTHREADS | |
706 | #define atexit git_atexit | |
707 | extern int git_atexit(void (*handler)(void)); | |
708 | #endif | |
709 | ||
710 | extern void release_pack_memory(size_t); | |
711 | ||
712 | typedef void (*try_to_free_t)(size_t); | |
713 | extern try_to_free_t set_try_to_free_routine(try_to_free_t); | |
714 | ||
715 | static inline size_t st_add(size_t a, size_t b) | |
716 | { | |
717 | if (unsigned_add_overflows(a, b)) | |
718 | die("size_t overflow: %"PRIuMAX" + %"PRIuMAX, | |
719 | (uintmax_t)a, (uintmax_t)b); | |
720 | return a + b; | |
721 | } | |
722 | #define st_add3(a,b,c) st_add((a),st_add((b),(c))) | |
723 | #define st_add4(a,b,c,d) st_add((a),st_add3((b),(c),(d))) | |
724 | ||
725 | static inline size_t st_mult(size_t a, size_t b) | |
726 | { | |
727 | if (unsigned_mult_overflows(a, b)) | |
728 | die("size_t overflow: %"PRIuMAX" * %"PRIuMAX, | |
729 | (uintmax_t)a, (uintmax_t)b); | |
730 | return a * b; | |
731 | } | |
732 | ||
733 | static inline size_t st_sub(size_t a, size_t b) | |
734 | { | |
735 | if (a < b) | |
736 | die("size_t underflow: %"PRIuMAX" - %"PRIuMAX, | |
737 | (uintmax_t)a, (uintmax_t)b); | |
738 | return a - b; | |
739 | } | |
740 | ||
741 | #ifdef HAVE_ALLOCA_H | |
742 | # include <alloca.h> | |
743 | # define xalloca(size) (alloca(size)) | |
744 | # define xalloca_free(p) do {} while (0) | |
745 | #else | |
746 | # define xalloca(size) (xmalloc(size)) | |
747 | # define xalloca_free(p) (free(p)) | |
748 | #endif | |
749 | extern char *xstrdup(const char *str); | |
750 | extern void *xmalloc(size_t size); | |
751 | extern void *xmallocz(size_t size); | |
752 | extern void *xmallocz_gently(size_t size); | |
753 | extern void *xmemdupz(const void *data, size_t len); | |
754 | extern char *xstrndup(const char *str, size_t len); | |
755 | extern void *xrealloc(void *ptr, size_t size); | |
756 | extern void *xcalloc(size_t nmemb, size_t size); | |
757 | extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
758 | extern void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
759 | extern int xopen(const char *path, int flags, ...); | |
760 | extern ssize_t xread(int fd, void *buf, size_t len); | |
761 | extern ssize_t xwrite(int fd, const void *buf, size_t len); | |
762 | extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset); | |
763 | extern int xdup(int fd); | |
764 | extern FILE *xfopen(const char *path, const char *mode); | |
765 | extern FILE *xfdopen(int fd, const char *mode); | |
766 | extern int xmkstemp(char *template); | |
767 | extern int xmkstemp_mode(char *template, int mode); | |
768 | extern int odb_mkstemp(char *template, size_t limit, const char *pattern); | |
769 | extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1); | |
770 | extern char *xgetcwd(void); | |
771 | extern FILE *fopen_for_writing(const char *path); | |
772 | ||
773 | #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) | |
774 | #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) | |
775 | ||
776 | /* | |
777 | * These functions help you allocate structs with flex arrays, and copy | |
778 | * the data directly into the array. For example, if you had: | |
779 | * | |
780 | * struct foo { | |
781 | * int bar; | |
782 | * char name[FLEX_ARRAY]; | |
783 | * }; | |
784 | * | |
785 | * you can do: | |
786 | * | |
787 | * struct foo *f; | |
788 | * FLEX_ALLOC_MEM(f, name, src, len); | |
789 | * | |
790 | * to allocate a "foo" with the contents of "src" in the "name" field. | |
791 | * The resulting struct is automatically zero'd, and the flex-array field | |
792 | * is NUL-terminated (whether the incoming src buffer was or not). | |
793 | * | |
794 | * The FLEXPTR_* variants operate on structs that don't use flex-arrays, | |
795 | * but do want to store a pointer to some extra data in the same allocated | |
796 | * block. For example, if you have: | |
797 | * | |
798 | * struct foo { | |
799 | * char *name; | |
800 | * int bar; | |
801 | * }; | |
802 | * | |
803 | * you can do: | |
804 | * | |
805 | * struct foo *f; | |
806 | * FLEX_ALLOC_STR(f, name, src); | |
807 | * | |
808 | * and "name" will point to a block of memory after the struct, which will be | |
809 | * freed along with the struct (but the pointer can be repointed anywhere). | |
810 | * | |
811 | * The *_STR variants accept a string parameter rather than a ptr/len | |
812 | * combination. | |
813 | * | |
814 | * Note that these macros will evaluate the first parameter multiple | |
815 | * times, and it must be assignable as an lvalue. | |
816 | */ | |
817 | #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ | |
818 | (x) = NULL; /* silence -Wuninitialized for offset calculation */ \ | |
819 | (x) = xalloc_flex(sizeof(*(x)), (char *)(&((x)->flexname)) - (char *)(x), (buf), (len)); \ | |
820 | } while (0) | |
821 | #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ | |
822 | (x) = xalloc_flex(sizeof(*(x)), sizeof(*(x)), (buf), (len)); \ | |
823 | (x)->ptrname = (void *)((x)+1); \ | |
824 | } while(0) | |
825 | #define FLEX_ALLOC_STR(x, flexname, str) \ | |
826 | FLEX_ALLOC_MEM((x), flexname, (str), strlen(str)) | |
827 | #define FLEXPTR_ALLOC_STR(x, ptrname, str) \ | |
828 | FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) | |
829 | ||
830 | static inline void *xalloc_flex(size_t base_len, size_t offset, | |
831 | const void *src, size_t src_len) | |
832 | { | |
833 | unsigned char *ret = xcalloc(1, st_add3(base_len, src_len, 1)); | |
834 | memcpy(ret + offset, src, src_len); | |
835 | return ret; | |
836 | } | |
837 | ||
838 | static inline char *xstrdup_or_null(const char *str) | |
839 | { | |
840 | return str ? xstrdup(str) : NULL; | |
841 | } | |
842 | ||
843 | static inline size_t xsize_t(off_t len) | |
844 | { | |
845 | if (len > (size_t) len) | |
846 | die("Cannot handle files this big"); | |
847 | return (size_t)len; | |
848 | } | |
849 | ||
850 | __attribute__((format (printf, 3, 4))) | |
851 | extern int xsnprintf(char *dst, size_t max, const char *fmt, ...); | |
852 | ||
853 | /* in ctype.c, for kwset users */ | |
854 | extern const unsigned char tolower_trans_tbl[256]; | |
855 | ||
856 | /* Sane ctype - no locale, and works with signed chars */ | |
857 | #undef isascii | |
858 | #undef isspace | |
859 | #undef isdigit | |
860 | #undef isalpha | |
861 | #undef isalnum | |
862 | #undef isprint | |
863 | #undef islower | |
864 | #undef isupper | |
865 | #undef tolower | |
866 | #undef toupper | |
867 | #undef iscntrl | |
868 | #undef ispunct | |
869 | #undef isxdigit | |
870 | ||
871 | extern const unsigned char sane_ctype[256]; | |
872 | #define GIT_SPACE 0x01 | |
873 | #define GIT_DIGIT 0x02 | |
874 | #define GIT_ALPHA 0x04 | |
875 | #define GIT_GLOB_SPECIAL 0x08 | |
876 | #define GIT_REGEX_SPECIAL 0x10 | |
877 | #define GIT_PATHSPEC_MAGIC 0x20 | |
878 | #define GIT_CNTRL 0x40 | |
879 | #define GIT_PUNCT 0x80 | |
880 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | |
881 | #define isascii(x) (((x) & ~0x7f) == 0) | |
882 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
883 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
884 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
885 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
886 | #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) | |
887 | #define islower(x) sane_iscase(x, 1) | |
888 | #define isupper(x) sane_iscase(x, 0) | |
889 | #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) | |
890 | #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) | |
891 | #define iscntrl(x) (sane_istest(x,GIT_CNTRL)) | |
892 | #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ | |
893 | GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) | |
894 | #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) | |
895 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
896 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
897 | #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) | |
898 | ||
899 | static inline int sane_case(int x, int high) | |
900 | { | |
901 | if (sane_istest(x, GIT_ALPHA)) | |
902 | x = (x & ~0x20) | high; | |
903 | return x; | |
904 | } | |
905 | ||
906 | static inline int sane_iscase(int x, int is_lower) | |
907 | { | |
908 | if (!sane_istest(x, GIT_ALPHA)) | |
909 | return 0; | |
910 | ||
911 | if (is_lower) | |
912 | return (x & 0x20) != 0; | |
913 | else | |
914 | return (x & 0x20) == 0; | |
915 | } | |
916 | ||
917 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) | |
918 | { | |
919 | unsigned long ul; | |
920 | char *p; | |
921 | ||
922 | errno = 0; | |
923 | /* negative values would be accepted by strtoul */ | |
924 | if (strchr(s, '-')) | |
925 | return -1; | |
926 | ul = strtoul(s, &p, base); | |
927 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
928 | return -1; | |
929 | *result = ul; | |
930 | return 0; | |
931 | } | |
932 | ||
933 | static inline int strtol_i(char const *s, int base, int *result) | |
934 | { | |
935 | long ul; | |
936 | char *p; | |
937 | ||
938 | errno = 0; | |
939 | ul = strtol(s, &p, base); | |
940 | if (errno || *p || p == s || (int) ul != ul) | |
941 | return -1; | |
942 | *result = ul; | |
943 | return 0; | |
944 | } | |
945 | ||
946 | #ifdef INTERNAL_QSORT | |
947 | void git_qsort(void *base, size_t nmemb, size_t size, | |
948 | int(*compar)(const void *, const void *)); | |
949 | #define qsort git_qsort | |
950 | #endif | |
951 | ||
952 | #ifndef DIR_HAS_BSD_GROUP_SEMANTICS | |
953 | # define FORCE_DIR_SET_GID S_ISGID | |
954 | #else | |
955 | # define FORCE_DIR_SET_GID 0 | |
956 | #endif | |
957 | ||
958 | #ifdef NO_NSEC | |
959 | #undef USE_NSEC | |
960 | #define ST_CTIME_NSEC(st) 0 | |
961 | #define ST_MTIME_NSEC(st) 0 | |
962 | #else | |
963 | #ifdef USE_ST_TIMESPEC | |
964 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) | |
965 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) | |
966 | #else | |
967 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) | |
968 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) | |
969 | #endif | |
970 | #endif | |
971 | ||
972 | #ifdef UNRELIABLE_FSTAT | |
973 | #define fstat_is_reliable() 0 | |
974 | #else | |
975 | #define fstat_is_reliable() 1 | |
976 | #endif | |
977 | ||
978 | #ifndef va_copy | |
979 | /* | |
980 | * Since an obvious implementation of va_list would be to make it a | |
981 | * pointer into the stack frame, a simple assignment will work on | |
982 | * many systems. But let's try to be more portable. | |
983 | */ | |
984 | #ifdef __va_copy | |
985 | #define va_copy(dst, src) __va_copy(dst, src) | |
986 | #else | |
987 | #define va_copy(dst, src) ((dst) = (src)) | |
988 | #endif | |
989 | #endif | |
990 | ||
991 | #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS) | |
992 | #define HAVE_VARIADIC_MACROS 1 | |
993 | #endif | |
994 | ||
995 | /* | |
996 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
997 | * Returns 0 on success, which includes trying to unlink an object that does | |
998 | * not exist. | |
999 | */ | |
1000 | int unlink_or_warn(const char *path); | |
1001 | /* | |
1002 | * Tries to unlink file. Returns 0 if unlink succeeded | |
1003 | * or the file already didn't exist. Returns -1 and | |
1004 | * appends a message to err suitable for | |
1005 | * 'error("%s", err->buf)' on error. | |
1006 | */ | |
1007 | int unlink_or_msg(const char *file, struct strbuf *err); | |
1008 | /* | |
1009 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
1010 | * Returns 0 on success, which includes trying to remove a directory that does | |
1011 | * not exist. | |
1012 | */ | |
1013 | int rmdir_or_warn(const char *path); | |
1014 | /* | |
1015 | * Calls the correct function out of {unlink,rmdir}_or_warn based on | |
1016 | * the supplied file mode. | |
1017 | */ | |
1018 | int remove_or_warn(unsigned int mode, const char *path); | |
1019 | ||
1020 | /* | |
1021 | * Call access(2), but warn for any error except "missing file" | |
1022 | * (ENOENT or ENOTDIR). | |
1023 | */ | |
1024 | #define ACCESS_EACCES_OK (1U << 0) | |
1025 | int access_or_warn(const char *path, int mode, unsigned flag); | |
1026 | int access_or_die(const char *path, int mode, unsigned flag); | |
1027 | ||
1028 | /* Warn on an inaccessible file that ought to be accessible */ | |
1029 | void warn_on_inaccessible(const char *path); | |
1030 | ||
1031 | #ifdef GMTIME_UNRELIABLE_ERRORS | |
1032 | struct tm *git_gmtime(const time_t *); | |
1033 | struct tm *git_gmtime_r(const time_t *, struct tm *); | |
1034 | #define gmtime git_gmtime | |
1035 | #define gmtime_r git_gmtime_r | |
1036 | #endif | |
1037 | ||
1038 | #if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__) | |
1039 | #define USE_PARENS_AROUND_GETTEXT_N 1 | |
1040 | #endif | |
1041 | ||
1042 | #ifndef SHELL_PATH | |
1043 | # define SHELL_PATH "/bin/sh" | |
1044 | #endif | |
1045 | ||
1046 | #ifndef _POSIX_THREAD_SAFE_FUNCTIONS | |
1047 | #define flockfile(fh) | |
1048 | #define funlockfile(fh) | |
1049 | #define getc_unlocked(fh) getc(fh) | |
1050 | #endif | |
1051 | ||
1052 | #endif |