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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(_WIN32_WINNT) | |
150 | # define _WIN32_WINNT 0x0600 | |
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 | #if !defined(NO_POLL_H) | |
184 | #include <poll.h> | |
185 | #elif !defined(NO_SYS_POLL_H) | |
186 | #include <sys/poll.h> | |
187 | #else | |
188 | /* Pull the compat stuff */ | |
189 | #include <poll.h> | |
190 | #endif | |
191 | #ifdef HAVE_BSD_SYSCTL | |
192 | #include <sys/sysctl.h> | |
193 | #endif | |
194 | ||
195 | #if defined(__CYGWIN__) | |
196 | #include "compat/win32/path-utils.h" | |
197 | #endif | |
198 | #if defined(__MINGW32__) | |
199 | /* pull in Windows compatibility stuff */ | |
200 | #include "compat/win32/path-utils.h" | |
201 | #include "compat/mingw.h" | |
202 | #elif defined(_MSC_VER) | |
203 | #include "compat/win32/path-utils.h" | |
204 | #include "compat/msvc.h" | |
205 | #else | |
206 | #include <sys/utsname.h> | |
207 | #include <sys/wait.h> | |
208 | #include <sys/resource.h> | |
209 | #include <sys/socket.h> | |
210 | #include <sys/ioctl.h> | |
211 | #include <termios.h> | |
212 | #ifndef NO_SYS_SELECT_H | |
213 | #include <sys/select.h> | |
214 | #endif | |
215 | #include <netinet/in.h> | |
216 | #include <netinet/tcp.h> | |
217 | #include <arpa/inet.h> | |
218 | #include <netdb.h> | |
219 | #include <pwd.h> | |
220 | #include <sys/un.h> | |
221 | #ifndef NO_INTTYPES_H | |
222 | #include <inttypes.h> | |
223 | #else | |
224 | #include <stdint.h> | |
225 | #endif | |
226 | #ifdef NO_INTPTR_T | |
227 | /* | |
228 | * On I16LP32, ILP32 and LP64 "long" is the safe bet, however | |
229 | * on LLP86, IL33LLP64 and P64 it needs to be "long long", | |
230 | * while on IP16 and IP16L32 it is "int" (resp. "short") | |
231 | * Size needs to match (or exceed) 'sizeof(void *)'. | |
232 | * We can't take "long long" here as not everybody has it. | |
233 | */ | |
234 | typedef long intptr_t; | |
235 | typedef unsigned long uintptr_t; | |
236 | #endif | |
237 | #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ | |
238 | #include <grp.h> | |
239 | #define _ALL_SOURCE 1 | |
240 | #endif | |
241 | ||
242 | /* used on Mac OS X */ | |
243 | #ifdef PRECOMPOSE_UNICODE | |
244 | #include "compat/precompose_utf8.h" | |
245 | #else | |
246 | #define precompose_str(in,i_nfd2nfc) | |
247 | #define precompose_argv(c,v) | |
248 | #define probe_utf8_pathname_composition() | |
249 | #endif | |
250 | ||
251 | #ifdef MKDIR_WO_TRAILING_SLASH | |
252 | #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) | |
253 | int compat_mkdir_wo_trailing_slash(const char*, mode_t); | |
254 | #endif | |
255 | ||
256 | #ifdef NO_STRUCT_ITIMERVAL | |
257 | struct itimerval { | |
258 | struct timeval it_interval; | |
259 | struct timeval it_value; | |
260 | }; | |
261 | #endif | |
262 | ||
263 | #ifdef NO_SETITIMER | |
264 | #define setitimer(which,value,ovalue) | |
265 | #endif | |
266 | ||
267 | #ifndef NO_LIBGEN_H | |
268 | #include <libgen.h> | |
269 | #else | |
270 | #define basename gitbasename | |
271 | char *gitbasename(char *); | |
272 | #define dirname gitdirname | |
273 | char *gitdirname(char *); | |
274 | #endif | |
275 | ||
276 | #ifndef NO_ICONV | |
277 | #include <iconv.h> | |
278 | #endif | |
279 | ||
280 | #ifndef NO_OPENSSL | |
281 | #ifdef __APPLE__ | |
282 | #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 | |
283 | #include <AvailabilityMacros.h> | |
284 | #undef DEPRECATED_ATTRIBUTE | |
285 | #define DEPRECATED_ATTRIBUTE | |
286 | #undef __AVAILABILITY_MACROS_USES_AVAILABILITY | |
287 | #endif | |
288 | #include <openssl/ssl.h> | |
289 | #include <openssl/err.h> | |
290 | #endif | |
291 | ||
292 | #ifdef HAVE_SYSINFO | |
293 | # include <sys/sysinfo.h> | |
294 | #endif | |
295 | ||
296 | /* On most systems <netdb.h> would have given us this, but | |
297 | * not on some systems (e.g. z/OS). | |
298 | */ | |
299 | #ifndef NI_MAXHOST | |
300 | #define NI_MAXHOST 1025 | |
301 | #endif | |
302 | ||
303 | #ifndef NI_MAXSERV | |
304 | #define NI_MAXSERV 32 | |
305 | #endif | |
306 | ||
307 | /* On most systems <limits.h> would have given us this, but | |
308 | * not on some systems (e.g. GNU/Hurd). | |
309 | */ | |
310 | #ifndef PATH_MAX | |
311 | #define PATH_MAX 4096 | |
312 | #endif | |
313 | ||
314 | #ifndef PRIuMAX | |
315 | #define PRIuMAX "llu" | |
316 | #endif | |
317 | ||
318 | #ifndef SCNuMAX | |
319 | #define SCNuMAX PRIuMAX | |
320 | #endif | |
321 | ||
322 | #ifndef PRIu32 | |
323 | #define PRIu32 "u" | |
324 | #endif | |
325 | ||
326 | #ifndef PRIx32 | |
327 | #define PRIx32 "x" | |
328 | #endif | |
329 | ||
330 | #ifndef PRIo32 | |
331 | #define PRIo32 "o" | |
332 | #endif | |
333 | ||
334 | typedef uintmax_t timestamp_t; | |
335 | #define PRItime PRIuMAX | |
336 | #define parse_timestamp strtoumax | |
337 | #define TIME_MAX UINTMAX_MAX | |
338 | ||
339 | #ifndef PATH_SEP | |
340 | #define PATH_SEP ':' | |
341 | #endif | |
342 | ||
343 | #ifdef HAVE_PATHS_H | |
344 | #include <paths.h> | |
345 | #endif | |
346 | #ifndef _PATH_DEFPATH | |
347 | #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" | |
348 | #endif | |
349 | ||
350 | #ifndef platform_core_config | |
351 | static inline int noop_core_config(const char *var, const char *value, void *cb) | |
352 | { | |
353 | return 0; | |
354 | } | |
355 | #define platform_core_config noop_core_config | |
356 | #endif | |
357 | ||
358 | #ifndef has_dos_drive_prefix | |
359 | static inline int git_has_dos_drive_prefix(const char *path) | |
360 | { | |
361 | return 0; | |
362 | } | |
363 | #define has_dos_drive_prefix git_has_dos_drive_prefix | |
364 | #endif | |
365 | ||
366 | #ifndef skip_dos_drive_prefix | |
367 | static inline int git_skip_dos_drive_prefix(char **path) | |
368 | { | |
369 | return 0; | |
370 | } | |
371 | #define skip_dos_drive_prefix git_skip_dos_drive_prefix | |
372 | #endif | |
373 | ||
374 | #ifndef is_dir_sep | |
375 | static inline int git_is_dir_sep(int c) | |
376 | { | |
377 | return c == '/'; | |
378 | } | |
379 | #define is_dir_sep git_is_dir_sep | |
380 | #endif | |
381 | ||
382 | #ifndef offset_1st_component | |
383 | static inline int git_offset_1st_component(const char *path) | |
384 | { | |
385 | return is_dir_sep(path[0]); | |
386 | } | |
387 | #define offset_1st_component git_offset_1st_component | |
388 | #endif | |
389 | ||
390 | #ifndef find_last_dir_sep | |
391 | static inline char *git_find_last_dir_sep(const char *path) | |
392 | { | |
393 | return strrchr(path, '/'); | |
394 | } | |
395 | #define find_last_dir_sep git_find_last_dir_sep | |
396 | #endif | |
397 | ||
398 | #ifndef query_user_email | |
399 | #define query_user_email() NULL | |
400 | #endif | |
401 | ||
402 | #ifdef __TANDEM | |
403 | #include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)> | |
404 | #include <floss.h(floss_getpwuid)> | |
405 | #ifndef NSIG | |
406 | /* | |
407 | * NonStop NSE and NSX do not provide NSIG. SIGGUARDIAN(99) is the highest | |
408 | * known, by detective work using kill -l as a list is all signals | |
409 | * instead of signal.h where it should be. | |
410 | */ | |
411 | # define NSIG 100 | |
412 | #endif | |
413 | #endif | |
414 | ||
415 | #if defined(__HP_cc) && (__HP_cc >= 61000) | |
416 | #define NORETURN __attribute__((noreturn)) | |
417 | #define NORETURN_PTR | |
418 | #elif defined(__GNUC__) && !defined(NO_NORETURN) | |
419 | #define NORETURN __attribute__((__noreturn__)) | |
420 | #define NORETURN_PTR __attribute__((__noreturn__)) | |
421 | #elif defined(_MSC_VER) | |
422 | #define NORETURN __declspec(noreturn) | |
423 | #define NORETURN_PTR | |
424 | #else | |
425 | #define NORETURN | |
426 | #define NORETURN_PTR | |
427 | #ifndef __GNUC__ | |
428 | #ifndef __attribute__ | |
429 | #define __attribute__(x) | |
430 | #endif | |
431 | #endif | |
432 | #endif | |
433 | ||
434 | /* The sentinel attribute is valid from gcc version 4.0 */ | |
435 | #if defined(__GNUC__) && (__GNUC__ >= 4) | |
436 | #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) | |
437 | #else | |
438 | #define LAST_ARG_MUST_BE_NULL | |
439 | #endif | |
440 | ||
441 | #define MAYBE_UNUSED __attribute__((__unused__)) | |
442 | ||
443 | #include "compat/bswap.h" | |
444 | ||
445 | #include "wildmatch.h" | |
446 | ||
447 | struct strbuf; | |
448 | ||
449 | /* General helper functions */ | |
450 | void vreportf(const char *prefix, const char *err, va_list params); | |
451 | NORETURN void usage(const char *err); | |
452 | NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
453 | NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
454 | NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
455 | int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
456 | int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
457 | void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
458 | void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
459 | ||
460 | #ifndef NO_OPENSSL | |
461 | #ifdef APPLE_COMMON_CRYPTO | |
462 | #include "compat/apple-common-crypto.h" | |
463 | #else | |
464 | #include <openssl/evp.h> | |
465 | #include <openssl/hmac.h> | |
466 | #endif /* APPLE_COMMON_CRYPTO */ | |
467 | #include <openssl/x509v3.h> | |
468 | #endif /* NO_OPENSSL */ | |
469 | ||
470 | /* | |
471 | * Let callers be aware of the constant return value; this can help | |
472 | * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, | |
473 | * because some compilers may not support variadic macros. Since we're only | |
474 | * trying to help gcc, anyway, it's OK; other compilers will fall back to | |
475 | * using the function as usual. | |
476 | */ | |
477 | #if defined(__GNUC__) | |
478 | static inline int const_error(void) | |
479 | { | |
480 | return -1; | |
481 | } | |
482 | #define error(...) (error(__VA_ARGS__), const_error()) | |
483 | #define error_errno(...) (error_errno(__VA_ARGS__), const_error()) | |
484 | #endif | |
485 | ||
486 | void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)); | |
487 | void set_error_routine(void (*routine)(const char *err, va_list params)); | |
488 | extern void (*get_error_routine(void))(const char *err, va_list params); | |
489 | void set_warn_routine(void (*routine)(const char *warn, va_list params)); | |
490 | extern void (*get_warn_routine(void))(const char *warn, va_list params); | |
491 | void set_die_is_recursing_routine(int (*routine)(void)); | |
492 | ||
493 | int starts_with(const char *str, const char *prefix); | |
494 | int istarts_with(const char *str, const char *prefix); | |
495 | ||
496 | /* | |
497 | * If the string "str" begins with the string found in "prefix", return 1. | |
498 | * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in | |
499 | * the string right after the prefix). | |
500 | * | |
501 | * Otherwise, return 0 and leave "out" untouched. | |
502 | * | |
503 | * Examples: | |
504 | * | |
505 | * [extract branch name, fail if not a branch] | |
506 | * if (!skip_prefix(ref, "refs/heads/", &branch) | |
507 | * return -1; | |
508 | * | |
509 | * [skip prefix if present, otherwise use whole string] | |
510 | * skip_prefix(name, "refs/heads/", &name); | |
511 | */ | |
512 | static inline int skip_prefix(const char *str, const char *prefix, | |
513 | const char **out) | |
514 | { | |
515 | do { | |
516 | if (!*prefix) { | |
517 | *out = str; | |
518 | return 1; | |
519 | } | |
520 | } while (*str++ == *prefix++); | |
521 | return 0; | |
522 | } | |
523 | ||
524 | /* | |
525 | * If the string "str" is the same as the string in "prefix", then the "arg" | |
526 | * parameter is set to the "def" parameter and 1 is returned. | |
527 | * If the string "str" begins with the string found in "prefix" and then a | |
528 | * "=" sign, then the "arg" parameter is set to "str + strlen(prefix) + 1" | |
529 | * (i.e., to the point in the string right after the prefix and the "=" sign), | |
530 | * and 1 is returned. | |
531 | * | |
532 | * Otherwise, return 0 and leave "arg" untouched. | |
533 | * | |
534 | * When we accept both a "--key" and a "--key=<val>" option, this function | |
535 | * can be used instead of !strcmp(arg, "--key") and then | |
536 | * skip_prefix(arg, "--key=", &arg) to parse such an option. | |
537 | */ | |
538 | int skip_to_optional_arg_default(const char *str, const char *prefix, | |
539 | const char **arg, const char *def); | |
540 | ||
541 | static inline int skip_to_optional_arg(const char *str, const char *prefix, | |
542 | const char **arg) | |
543 | { | |
544 | return skip_to_optional_arg_default(str, prefix, arg, ""); | |
545 | } | |
546 | ||
547 | /* | |
548 | * Like skip_prefix, but promises never to read past "len" bytes of the input | |
549 | * buffer, and returns the remaining number of bytes in "out" via "outlen". | |
550 | */ | |
551 | static inline int skip_prefix_mem(const char *buf, size_t len, | |
552 | const char *prefix, | |
553 | const char **out, size_t *outlen) | |
554 | { | |
555 | size_t prefix_len = strlen(prefix); | |
556 | if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) { | |
557 | *out = buf + prefix_len; | |
558 | *outlen = len - prefix_len; | |
559 | return 1; | |
560 | } | |
561 | return 0; | |
562 | } | |
563 | ||
564 | /* | |
565 | * If buf ends with suffix, return 1 and subtract the length of the suffix | |
566 | * from *len. Otherwise, return 0 and leave *len untouched. | |
567 | */ | |
568 | static inline int strip_suffix_mem(const char *buf, size_t *len, | |
569 | const char *suffix) | |
570 | { | |
571 | size_t suflen = strlen(suffix); | |
572 | if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) | |
573 | return 0; | |
574 | *len -= suflen; | |
575 | return 1; | |
576 | } | |
577 | ||
578 | /* | |
579 | * If str ends with suffix, return 1 and set *len to the size of the string | |
580 | * without the suffix. Otherwise, return 0 and set *len to the size of the | |
581 | * string. | |
582 | * | |
583 | * Note that we do _not_ NUL-terminate str to the new length. | |
584 | */ | |
585 | static inline int strip_suffix(const char *str, const char *suffix, size_t *len) | |
586 | { | |
587 | *len = strlen(str); | |
588 | return strip_suffix_mem(str, len, suffix); | |
589 | } | |
590 | ||
591 | static inline int ends_with(const char *str, const char *suffix) | |
592 | { | |
593 | size_t len; | |
594 | return strip_suffix(str, suffix, &len); | |
595 | } | |
596 | ||
597 | #define SWAP(a, b) do { \ | |
598 | void *_swap_a_ptr = &(a); \ | |
599 | void *_swap_b_ptr = &(b); \ | |
600 | unsigned char _swap_buffer[sizeof(a)]; \ | |
601 | memcpy(_swap_buffer, _swap_a_ptr, sizeof(a)); \ | |
602 | memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) + \ | |
603 | BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b))); \ | |
604 | memcpy(_swap_b_ptr, _swap_buffer, sizeof(a)); \ | |
605 | } while (0) | |
606 | ||
607 | #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) | |
608 | ||
609 | #ifndef PROT_READ | |
610 | #define PROT_READ 1 | |
611 | #define PROT_WRITE 2 | |
612 | #define MAP_PRIVATE 1 | |
613 | #endif | |
614 | ||
615 | #define mmap git_mmap | |
616 | #define munmap git_munmap | |
617 | void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
618 | int git_munmap(void *start, size_t length); | |
619 | ||
620 | #else /* NO_MMAP || USE_WIN32_MMAP */ | |
621 | ||
622 | #include <sys/mman.h> | |
623 | ||
624 | #endif /* NO_MMAP || USE_WIN32_MMAP */ | |
625 | ||
626 | #ifdef NO_MMAP | |
627 | ||
628 | /* This value must be multiple of (pagesize * 2) */ | |
629 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) | |
630 | ||
631 | #else /* NO_MMAP */ | |
632 | ||
633 | /* This value must be multiple of (pagesize * 2) */ | |
634 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ | |
635 | (sizeof(void*) >= 8 \ | |
636 | ? 1 * 1024 * 1024 * 1024 \ | |
637 | : 32 * 1024 * 1024) | |
638 | ||
639 | #endif /* NO_MMAP */ | |
640 | ||
641 | #ifndef MAP_FAILED | |
642 | #define MAP_FAILED ((void *)-1) | |
643 | #endif | |
644 | ||
645 | #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT | |
646 | #define on_disk_bytes(st) ((st).st_size) | |
647 | #else | |
648 | #define on_disk_bytes(st) ((st).st_blocks * 512) | |
649 | #endif | |
650 | ||
651 | #ifdef NEEDS_MODE_TRANSLATION | |
652 | #undef S_IFMT | |
653 | #undef S_IFREG | |
654 | #undef S_IFDIR | |
655 | #undef S_IFLNK | |
656 | #undef S_IFBLK | |
657 | #undef S_IFCHR | |
658 | #undef S_IFIFO | |
659 | #undef S_IFSOCK | |
660 | #define S_IFMT 0170000 | |
661 | #define S_IFREG 0100000 | |
662 | #define S_IFDIR 0040000 | |
663 | #define S_IFLNK 0120000 | |
664 | #define S_IFBLK 0060000 | |
665 | #define S_IFCHR 0020000 | |
666 | #define S_IFIFO 0010000 | |
667 | #define S_IFSOCK 0140000 | |
668 | #ifdef stat | |
669 | #undef stat | |
670 | #endif | |
671 | #define stat(path, buf) git_stat(path, buf) | |
672 | int git_stat(const char *, struct stat *); | |
673 | #ifdef fstat | |
674 | #undef fstat | |
675 | #endif | |
676 | #define fstat(fd, buf) git_fstat(fd, buf) | |
677 | int git_fstat(int, struct stat *); | |
678 | #ifdef lstat | |
679 | #undef lstat | |
680 | #endif | |
681 | #define lstat(path, buf) git_lstat(path, buf) | |
682 | int git_lstat(const char *, struct stat *); | |
683 | #endif | |
684 | ||
685 | #define DEFAULT_PACKED_GIT_LIMIT \ | |
686 | ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? (32 * 1024L * 1024L) : 256)) | |
687 | ||
688 | #ifdef NO_PREAD | |
689 | #define pread git_pread | |
690 | ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); | |
691 | #endif | |
692 | /* | |
693 | * Forward decl that will remind us if its twin in cache.h changes. | |
694 | * This function is used in compat/pread.c. But we can't include | |
695 | * cache.h there. | |
696 | */ | |
697 | ssize_t read_in_full(int fd, void *buf, size_t count); | |
698 | ||
699 | #ifdef NO_SETENV | |
700 | #define setenv gitsetenv | |
701 | int gitsetenv(const char *, const char *, int); | |
702 | #endif | |
703 | ||
704 | #ifdef NO_MKDTEMP | |
705 | #define mkdtemp gitmkdtemp | |
706 | char *gitmkdtemp(char *); | |
707 | #endif | |
708 | ||
709 | #ifdef NO_UNSETENV | |
710 | #define unsetenv gitunsetenv | |
711 | void gitunsetenv(const char *); | |
712 | #endif | |
713 | ||
714 | #ifdef NO_STRCASESTR | |
715 | #define strcasestr gitstrcasestr | |
716 | char *gitstrcasestr(const char *haystack, const char *needle); | |
717 | #endif | |
718 | ||
719 | #ifdef NO_STRLCPY | |
720 | #define strlcpy gitstrlcpy | |
721 | size_t gitstrlcpy(char *, const char *, size_t); | |
722 | #endif | |
723 | ||
724 | #ifdef NO_STRTOUMAX | |
725 | #define strtoumax gitstrtoumax | |
726 | uintmax_t gitstrtoumax(const char *, char **, int); | |
727 | #define strtoimax gitstrtoimax | |
728 | intmax_t gitstrtoimax(const char *, char **, int); | |
729 | #endif | |
730 | ||
731 | #ifdef NO_HSTRERROR | |
732 | #define hstrerror githstrerror | |
733 | const char *githstrerror(int herror); | |
734 | #endif | |
735 | ||
736 | #ifdef NO_MEMMEM | |
737 | #define memmem gitmemmem | |
738 | void *gitmemmem(const void *haystack, size_t haystacklen, | |
739 | const void *needle, size_t needlelen); | |
740 | #endif | |
741 | ||
742 | #ifdef OVERRIDE_STRDUP | |
743 | #ifdef strdup | |
744 | #undef strdup | |
745 | #endif | |
746 | #define strdup gitstrdup | |
747 | char *gitstrdup(const char *s); | |
748 | #endif | |
749 | ||
750 | #ifdef NO_GETPAGESIZE | |
751 | #define getpagesize() sysconf(_SC_PAGESIZE) | |
752 | #endif | |
753 | ||
754 | #ifndef O_CLOEXEC | |
755 | #define O_CLOEXEC 0 | |
756 | #endif | |
757 | ||
758 | #ifdef FREAD_READS_DIRECTORIES | |
759 | # if !defined(SUPPRESS_FOPEN_REDEFINITION) | |
760 | # ifdef fopen | |
761 | # undef fopen | |
762 | # endif | |
763 | # define fopen(a,b) git_fopen(a,b) | |
764 | # endif | |
765 | FILE *git_fopen(const char*, const char*); | |
766 | #endif | |
767 | ||
768 | #ifdef SNPRINTF_RETURNS_BOGUS | |
769 | #ifdef snprintf | |
770 | #undef snprintf | |
771 | #endif | |
772 | #define snprintf git_snprintf | |
773 | int git_snprintf(char *str, size_t maxsize, | |
774 | const char *format, ...); | |
775 | #ifdef vsnprintf | |
776 | #undef vsnprintf | |
777 | #endif | |
778 | #define vsnprintf git_vsnprintf | |
779 | int git_vsnprintf(char *str, size_t maxsize, | |
780 | const char *format, va_list ap); | |
781 | #endif | |
782 | ||
783 | #ifdef __GLIBC_PREREQ | |
784 | #if __GLIBC_PREREQ(2, 1) | |
785 | #define HAVE_STRCHRNUL | |
786 | #endif | |
787 | #endif | |
788 | ||
789 | #ifndef HAVE_STRCHRNUL | |
790 | #define strchrnul gitstrchrnul | |
791 | static inline char *gitstrchrnul(const char *s, int c) | |
792 | { | |
793 | while (*s && *s != c) | |
794 | s++; | |
795 | return (char *)s; | |
796 | } | |
797 | #endif | |
798 | ||
799 | #ifdef NO_INET_PTON | |
800 | int inet_pton(int af, const char *src, void *dst); | |
801 | #endif | |
802 | ||
803 | #ifdef NO_INET_NTOP | |
804 | const char *inet_ntop(int af, const void *src, char *dst, size_t size); | |
805 | #endif | |
806 | ||
807 | #ifdef NO_PTHREADS | |
808 | #define atexit git_atexit | |
809 | int git_atexit(void (*handler)(void)); | |
810 | #endif | |
811 | ||
812 | typedef void (*try_to_free_t)(size_t); | |
813 | try_to_free_t set_try_to_free_routine(try_to_free_t); | |
814 | ||
815 | static inline size_t st_add(size_t a, size_t b) | |
816 | { | |
817 | if (unsigned_add_overflows(a, b)) | |
818 | die("size_t overflow: %"PRIuMAX" + %"PRIuMAX, | |
819 | (uintmax_t)a, (uintmax_t)b); | |
820 | return a + b; | |
821 | } | |
822 | #define st_add3(a,b,c) st_add(st_add((a),(b)),(c)) | |
823 | #define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d)) | |
824 | ||
825 | static inline size_t st_mult(size_t a, size_t b) | |
826 | { | |
827 | if (unsigned_mult_overflows(a, b)) | |
828 | die("size_t overflow: %"PRIuMAX" * %"PRIuMAX, | |
829 | (uintmax_t)a, (uintmax_t)b); | |
830 | return a * b; | |
831 | } | |
832 | ||
833 | static inline size_t st_sub(size_t a, size_t b) | |
834 | { | |
835 | if (a < b) | |
836 | die("size_t underflow: %"PRIuMAX" - %"PRIuMAX, | |
837 | (uintmax_t)a, (uintmax_t)b); | |
838 | return a - b; | |
839 | } | |
840 | ||
841 | #ifdef HAVE_ALLOCA_H | |
842 | # include <alloca.h> | |
843 | # define xalloca(size) (alloca(size)) | |
844 | # define xalloca_free(p) do {} while (0) | |
845 | #else | |
846 | # define xalloca(size) (xmalloc(size)) | |
847 | # define xalloca_free(p) (free(p)) | |
848 | #endif | |
849 | char *xstrdup(const char *str); | |
850 | void *xmalloc(size_t size); | |
851 | void *xmallocz(size_t size); | |
852 | void *xmallocz_gently(size_t size); | |
853 | void *xmemdupz(const void *data, size_t len); | |
854 | char *xstrndup(const char *str, size_t len); | |
855 | void *xrealloc(void *ptr, size_t size); | |
856 | void *xcalloc(size_t nmemb, size_t size); | |
857 | void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
858 | void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
859 | int xopen(const char *path, int flags, ...); | |
860 | ssize_t xread(int fd, void *buf, size_t len); | |
861 | ssize_t xwrite(int fd, const void *buf, size_t len); | |
862 | ssize_t xpread(int fd, void *buf, size_t len, off_t offset); | |
863 | int xdup(int fd); | |
864 | FILE *xfopen(const char *path, const char *mode); | |
865 | FILE *xfdopen(int fd, const char *mode); | |
866 | int xmkstemp(char *temp_filename); | |
867 | int xmkstemp_mode(char *temp_filename, int mode); | |
868 | char *xgetcwd(void); | |
869 | FILE *fopen_for_writing(const char *path); | |
870 | FILE *fopen_or_warn(const char *path, const char *mode); | |
871 | ||
872 | /* | |
873 | * FREE_AND_NULL(ptr) is like free(ptr) followed by ptr = NULL. Note | |
874 | * that ptr is used twice, so don't pass e.g. ptr++. | |
875 | */ | |
876 | #define FREE_AND_NULL(p) do { free(p); (p) = NULL; } while (0) | |
877 | ||
878 | #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) | |
879 | #define CALLOC_ARRAY(x, alloc) (x) = xcalloc((alloc), sizeof(*(x))); | |
880 | #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) | |
881 | ||
882 | #define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \ | |
883 | BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) | |
884 | static inline void copy_array(void *dst, const void *src, size_t n, size_t size) | |
885 | { | |
886 | if (n) | |
887 | memcpy(dst, src, st_mult(size, n)); | |
888 | } | |
889 | ||
890 | #define MOVE_ARRAY(dst, src, n) move_array((dst), (src), (n), sizeof(*(dst)) + \ | |
891 | BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) | |
892 | static inline void move_array(void *dst, const void *src, size_t n, size_t size) | |
893 | { | |
894 | if (n) | |
895 | memmove(dst, src, st_mult(size, n)); | |
896 | } | |
897 | ||
898 | /* | |
899 | * These functions help you allocate structs with flex arrays, and copy | |
900 | * the data directly into the array. For example, if you had: | |
901 | * | |
902 | * struct foo { | |
903 | * int bar; | |
904 | * char name[FLEX_ARRAY]; | |
905 | * }; | |
906 | * | |
907 | * you can do: | |
908 | * | |
909 | * struct foo *f; | |
910 | * FLEX_ALLOC_MEM(f, name, src, len); | |
911 | * | |
912 | * to allocate a "foo" with the contents of "src" in the "name" field. | |
913 | * The resulting struct is automatically zero'd, and the flex-array field | |
914 | * is NUL-terminated (whether the incoming src buffer was or not). | |
915 | * | |
916 | * The FLEXPTR_* variants operate on structs that don't use flex-arrays, | |
917 | * but do want to store a pointer to some extra data in the same allocated | |
918 | * block. For example, if you have: | |
919 | * | |
920 | * struct foo { | |
921 | * char *name; | |
922 | * int bar; | |
923 | * }; | |
924 | * | |
925 | * you can do: | |
926 | * | |
927 | * struct foo *f; | |
928 | * FLEXPTR_ALLOC_STR(f, name, src); | |
929 | * | |
930 | * and "name" will point to a block of memory after the struct, which will be | |
931 | * freed along with the struct (but the pointer can be repointed anywhere). | |
932 | * | |
933 | * The *_STR variants accept a string parameter rather than a ptr/len | |
934 | * combination. | |
935 | * | |
936 | * Note that these macros will evaluate the first parameter multiple | |
937 | * times, and it must be assignable as an lvalue. | |
938 | */ | |
939 | #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ | |
940 | size_t flex_array_len_ = (len); \ | |
941 | (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ | |
942 | memcpy((void *)(x)->flexname, (buf), flex_array_len_); \ | |
943 | } while (0) | |
944 | #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ | |
945 | size_t flex_array_len_ = (len); \ | |
946 | (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ | |
947 | memcpy((x) + 1, (buf), flex_array_len_); \ | |
948 | (x)->ptrname = (void *)((x)+1); \ | |
949 | } while(0) | |
950 | #define FLEX_ALLOC_STR(x, flexname, str) \ | |
951 | FLEX_ALLOC_MEM((x), flexname, (str), strlen(str)) | |
952 | #define FLEXPTR_ALLOC_STR(x, ptrname, str) \ | |
953 | FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) | |
954 | ||
955 | static inline char *xstrdup_or_null(const char *str) | |
956 | { | |
957 | return str ? xstrdup(str) : NULL; | |
958 | } | |
959 | ||
960 | static inline size_t xsize_t(off_t len) | |
961 | { | |
962 | size_t size = (size_t) len; | |
963 | ||
964 | if (len != (off_t) size) | |
965 | die("Cannot handle files this big"); | |
966 | return size; | |
967 | } | |
968 | ||
969 | __attribute__((format (printf, 3, 4))) | |
970 | int xsnprintf(char *dst, size_t max, const char *fmt, ...); | |
971 | ||
972 | #ifndef HOST_NAME_MAX | |
973 | #define HOST_NAME_MAX 256 | |
974 | #endif | |
975 | ||
976 | int xgethostname(char *buf, size_t len); | |
977 | ||
978 | /* in ctype.c, for kwset users */ | |
979 | extern const unsigned char tolower_trans_tbl[256]; | |
980 | ||
981 | /* Sane ctype - no locale, and works with signed chars */ | |
982 | #undef isascii | |
983 | #undef isspace | |
984 | #undef isdigit | |
985 | #undef isalpha | |
986 | #undef isalnum | |
987 | #undef isprint | |
988 | #undef islower | |
989 | #undef isupper | |
990 | #undef tolower | |
991 | #undef toupper | |
992 | #undef iscntrl | |
993 | #undef ispunct | |
994 | #undef isxdigit | |
995 | ||
996 | extern const unsigned char sane_ctype[256]; | |
997 | #define GIT_SPACE 0x01 | |
998 | #define GIT_DIGIT 0x02 | |
999 | #define GIT_ALPHA 0x04 | |
1000 | #define GIT_GLOB_SPECIAL 0x08 | |
1001 | #define GIT_REGEX_SPECIAL 0x10 | |
1002 | #define GIT_PATHSPEC_MAGIC 0x20 | |
1003 | #define GIT_CNTRL 0x40 | |
1004 | #define GIT_PUNCT 0x80 | |
1005 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | |
1006 | #define isascii(x) (((x) & ~0x7f) == 0) | |
1007 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
1008 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
1009 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
1010 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
1011 | #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) | |
1012 | #define islower(x) sane_iscase(x, 1) | |
1013 | #define isupper(x) sane_iscase(x, 0) | |
1014 | #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) | |
1015 | #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) | |
1016 | #define iscntrl(x) (sane_istest(x,GIT_CNTRL)) | |
1017 | #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ | |
1018 | GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) | |
1019 | #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) | |
1020 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
1021 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
1022 | #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) | |
1023 | ||
1024 | static inline int sane_case(int x, int high) | |
1025 | { | |
1026 | if (sane_istest(x, GIT_ALPHA)) | |
1027 | x = (x & ~0x20) | high; | |
1028 | return x; | |
1029 | } | |
1030 | ||
1031 | static inline int sane_iscase(int x, int is_lower) | |
1032 | { | |
1033 | if (!sane_istest(x, GIT_ALPHA)) | |
1034 | return 0; | |
1035 | ||
1036 | if (is_lower) | |
1037 | return (x & 0x20) != 0; | |
1038 | else | |
1039 | return (x & 0x20) == 0; | |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * Like skip_prefix, but compare case-insensitively. Note that the comparison | |
1044 | * is done via tolower(), so it is strictly ASCII (no multi-byte characters or | |
1045 | * locale-specific conversions). | |
1046 | */ | |
1047 | static inline int skip_iprefix(const char *str, const char *prefix, | |
1048 | const char **out) | |
1049 | { | |
1050 | do { | |
1051 | if (!*prefix) { | |
1052 | *out = str; | |
1053 | return 1; | |
1054 | } | |
1055 | } while (tolower(*str++) == tolower(*prefix++)); | |
1056 | return 0; | |
1057 | } | |
1058 | ||
1059 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) | |
1060 | { | |
1061 | unsigned long ul; | |
1062 | char *p; | |
1063 | ||
1064 | errno = 0; | |
1065 | /* negative values would be accepted by strtoul */ | |
1066 | if (strchr(s, '-')) | |
1067 | return -1; | |
1068 | ul = strtoul(s, &p, base); | |
1069 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
1070 | return -1; | |
1071 | *result = ul; | |
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | static inline int strtol_i(char const *s, int base, int *result) | |
1076 | { | |
1077 | long ul; | |
1078 | char *p; | |
1079 | ||
1080 | errno = 0; | |
1081 | ul = strtol(s, &p, base); | |
1082 | if (errno || *p || p == s || (int) ul != ul) | |
1083 | return -1; | |
1084 | *result = ul; | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | #ifdef INTERNAL_QSORT | |
1089 | void git_qsort(void *base, size_t nmemb, size_t size, | |
1090 | int(*compar)(const void *, const void *)); | |
1091 | #define qsort git_qsort | |
1092 | #endif | |
1093 | ||
1094 | #define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar) | |
1095 | static inline void sane_qsort(void *base, size_t nmemb, size_t size, | |
1096 | int(*compar)(const void *, const void *)) | |
1097 | { | |
1098 | if (nmemb > 1) | |
1099 | qsort(base, nmemb, size, compar); | |
1100 | } | |
1101 | ||
1102 | #ifndef HAVE_ISO_QSORT_S | |
1103 | int git_qsort_s(void *base, size_t nmemb, size_t size, | |
1104 | int (*compar)(const void *, const void *, void *), void *ctx); | |
1105 | #define qsort_s git_qsort_s | |
1106 | #endif | |
1107 | ||
1108 | #define QSORT_S(base, n, compar, ctx) do { \ | |
1109 | if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \ | |
1110 | BUG("qsort_s() failed"); \ | |
1111 | } while (0) | |
1112 | ||
1113 | #ifndef REG_STARTEND | |
1114 | #error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd" | |
1115 | #endif | |
1116 | ||
1117 | static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size, | |
1118 | size_t nmatch, regmatch_t pmatch[], int eflags) | |
1119 | { | |
1120 | assert(nmatch > 0 && pmatch); | |
1121 | pmatch[0].rm_so = 0; | |
1122 | pmatch[0].rm_eo = size; | |
1123 | return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND); | |
1124 | } | |
1125 | ||
1126 | #ifndef DIR_HAS_BSD_GROUP_SEMANTICS | |
1127 | # define FORCE_DIR_SET_GID S_ISGID | |
1128 | #else | |
1129 | # define FORCE_DIR_SET_GID 0 | |
1130 | #endif | |
1131 | ||
1132 | #ifdef NO_NSEC | |
1133 | #undef USE_NSEC | |
1134 | #define ST_CTIME_NSEC(st) 0 | |
1135 | #define ST_MTIME_NSEC(st) 0 | |
1136 | #else | |
1137 | #ifdef USE_ST_TIMESPEC | |
1138 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) | |
1139 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) | |
1140 | #else | |
1141 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) | |
1142 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) | |
1143 | #endif | |
1144 | #endif | |
1145 | ||
1146 | #ifdef UNRELIABLE_FSTAT | |
1147 | #define fstat_is_reliable() 0 | |
1148 | #else | |
1149 | #define fstat_is_reliable() 1 | |
1150 | #endif | |
1151 | ||
1152 | #ifndef va_copy | |
1153 | /* | |
1154 | * Since an obvious implementation of va_list would be to make it a | |
1155 | * pointer into the stack frame, a simple assignment will work on | |
1156 | * many systems. But let's try to be more portable. | |
1157 | */ | |
1158 | #ifdef __va_copy | |
1159 | #define va_copy(dst, src) __va_copy(dst, src) | |
1160 | #else | |
1161 | #define va_copy(dst, src) ((dst) = (src)) | |
1162 | #endif | |
1163 | #endif | |
1164 | ||
1165 | #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS) | |
1166 | #define HAVE_VARIADIC_MACROS 1 | |
1167 | #endif | |
1168 | ||
1169 | /* usage.c: only to be used for testing BUG() implementation (see test-tool) */ | |
1170 | extern int BUG_exit_code; | |
1171 | ||
1172 | #ifdef HAVE_VARIADIC_MACROS | |
1173 | __attribute__((format (printf, 3, 4))) NORETURN | |
1174 | void BUG_fl(const char *file, int line, const char *fmt, ...); | |
1175 | #define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__) | |
1176 | #else | |
1177 | __attribute__((format (printf, 1, 2))) NORETURN | |
1178 | void BUG(const char *fmt, ...); | |
1179 | #endif | |
1180 | ||
1181 | /* | |
1182 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
1183 | * Returns 0 on success, which includes trying to unlink an object that does | |
1184 | * not exist. | |
1185 | */ | |
1186 | int unlink_or_warn(const char *path); | |
1187 | /* | |
1188 | * Tries to unlink file. Returns 0 if unlink succeeded | |
1189 | * or the file already didn't exist. Returns -1 and | |
1190 | * appends a message to err suitable for | |
1191 | * 'error("%s", err->buf)' on error. | |
1192 | */ | |
1193 | int unlink_or_msg(const char *file, struct strbuf *err); | |
1194 | /* | |
1195 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
1196 | * Returns 0 on success, which includes trying to remove a directory that does | |
1197 | * not exist. | |
1198 | */ | |
1199 | int rmdir_or_warn(const char *path); | |
1200 | /* | |
1201 | * Calls the correct function out of {unlink,rmdir}_or_warn based on | |
1202 | * the supplied file mode. | |
1203 | */ | |
1204 | int remove_or_warn(unsigned int mode, const char *path); | |
1205 | ||
1206 | /* | |
1207 | * Call access(2), but warn for any error except "missing file" | |
1208 | * (ENOENT or ENOTDIR). | |
1209 | */ | |
1210 | #define ACCESS_EACCES_OK (1U << 0) | |
1211 | int access_or_warn(const char *path, int mode, unsigned flag); | |
1212 | int access_or_die(const char *path, int mode, unsigned flag); | |
1213 | ||
1214 | /* Warn on an inaccessible file if errno indicates this is an error */ | |
1215 | int warn_on_fopen_errors(const char *path); | |
1216 | ||
1217 | #ifdef GMTIME_UNRELIABLE_ERRORS | |
1218 | struct tm *git_gmtime(const time_t *); | |
1219 | struct tm *git_gmtime_r(const time_t *, struct tm *); | |
1220 | #define gmtime git_gmtime | |
1221 | #define gmtime_r git_gmtime_r | |
1222 | #endif | |
1223 | ||
1224 | #if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__) | |
1225 | #define USE_PARENS_AROUND_GETTEXT_N 1 | |
1226 | #endif | |
1227 | ||
1228 | #ifndef SHELL_PATH | |
1229 | # define SHELL_PATH "/bin/sh" | |
1230 | #endif | |
1231 | ||
1232 | #ifndef _POSIX_THREAD_SAFE_FUNCTIONS | |
1233 | #define flockfile(fh) | |
1234 | #define funlockfile(fh) | |
1235 | #define getc_unlocked(fh) getc(fh) | |
1236 | #endif | |
1237 | ||
1238 | #ifdef FILENO_IS_A_MACRO | |
1239 | int git_fileno(FILE *stream); | |
1240 | # ifndef COMPAT_CODE_FILENO | |
1241 | # undef fileno | |
1242 | # define fileno(p) git_fileno(p) | |
1243 | # endif | |
1244 | #endif | |
1245 | ||
1246 | #ifdef NEED_ACCESS_ROOT_HANDLER | |
1247 | int git_access(const char *path, int mode); | |
1248 | # ifndef COMPAT_CODE_ACCESS | |
1249 | # ifdef access | |
1250 | # undef access | |
1251 | # endif | |
1252 | # define access(path, mode) git_access(path, mode) | |
1253 | # endif | |
1254 | #endif | |
1255 | ||
1256 | /* | |
1257 | * Our code often opens a path to an optional file, to work on its | |
1258 | * contents when we can successfully open it. We can ignore a failure | |
1259 | * to open if such an optional file does not exist, but we do want to | |
1260 | * report a failure in opening for other reasons (e.g. we got an I/O | |
1261 | * error, or the file is there, but we lack the permission to open). | |
1262 | * | |
1263 | * Call this function after seeing an error from open() or fopen() to | |
1264 | * see if the errno indicates a missing file that we can safely ignore. | |
1265 | */ | |
1266 | static inline int is_missing_file_error(int errno_) | |
1267 | { | |
1268 | return (errno_ == ENOENT || errno_ == ENOTDIR); | |
1269 | } | |
1270 | ||
1271 | int cmd_main(int, const char **); | |
1272 | ||
1273 | /* | |
1274 | * Intercept all calls to exit() and route them to trace2 to | |
1275 | * optionally emit a message before calling the real exit(). | |
1276 | */ | |
1277 | int trace2_cmd_exit_fl(const char *file, int line, int code); | |
1278 | #define exit(code) exit(trace2_cmd_exit_fl(__FILE__, __LINE__, (code))) | |
1279 | ||
1280 | /* | |
1281 | * You can mark a stack variable with UNLEAK(var) to avoid it being | |
1282 | * reported as a leak by tools like LSAN or valgrind. The argument | |
1283 | * should generally be the variable itself (not its address and not what | |
1284 | * it points to). It's safe to use this on pointers which may already | |
1285 | * have been freed, or on pointers which may still be in use. | |
1286 | * | |
1287 | * Use this _only_ for a variable that leaks by going out of scope at | |
1288 | * program exit (so only from cmd_* functions or their direct helpers). | |
1289 | * Normal functions, especially those which may be called multiple | |
1290 | * times, should actually free their memory. This is only meant as | |
1291 | * an annotation, and does nothing in non-leak-checking builds. | |
1292 | */ | |
1293 | #ifdef SUPPRESS_ANNOTATED_LEAKS | |
1294 | void unleak_memory(const void *ptr, size_t len); | |
1295 | #define UNLEAK(var) unleak_memory(&(var), sizeof(var)) | |
1296 | #else | |
1297 | #define UNLEAK(var) do {} while (0) | |
1298 | #endif | |
1299 | ||
1300 | /* | |
1301 | * This include must come after system headers, since it introduces macros that | |
1302 | * replace system names. | |
1303 | */ | |
1304 | #include "banned.h" | |
1305 | ||
1306 | #endif |