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