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1 | #ifndef GIT_COMPAT_UTIL_H | |
2 | #define GIT_COMPAT_UTIL_H | |
3 | ||
4 | #ifdef USE_MSVC_CRTDBG | |
5 | /* | |
6 | * For these to work they must appear very early in each | |
7 | * file -- before most of the standard header files. | |
8 | */ | |
9 | #include <stdlib.h> | |
10 | #include <crtdbg.h> | |
11 | #endif | |
12 | ||
13 | #define _FILE_OFFSET_BITS 64 | |
14 | ||
15 | ||
16 | /* Derived from Linux "Features Test Macro" header | |
17 | * Convenience macros to test the versions of gcc (or | |
18 | * a compatible compiler). | |
19 | * Use them like this: | |
20 | * #if GIT_GNUC_PREREQ (2,8) | |
21 | * ... code requiring gcc 2.8 or later ... | |
22 | * #endif | |
23 | */ | |
24 | #if defined(__GNUC__) && defined(__GNUC_MINOR__) | |
25 | # define GIT_GNUC_PREREQ(maj, min) \ | |
26 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | |
27 | #else | |
28 | #define GIT_GNUC_PREREQ(maj, min) 0 | |
29 | #endif | |
30 | ||
31 | ||
32 | #ifndef FLEX_ARRAY | |
33 | /* | |
34 | * See if our compiler is known to support flexible array members. | |
35 | */ | |
36 | #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580)) | |
37 | # define FLEX_ARRAY /* empty */ | |
38 | #elif defined(__GNUC__) | |
39 | # if (__GNUC__ >= 3) | |
40 | # define FLEX_ARRAY /* empty */ | |
41 | # else | |
42 | # define FLEX_ARRAY 0 /* older GNU extension */ | |
43 | # endif | |
44 | #endif | |
45 | ||
46 | /* | |
47 | * Otherwise, default to safer but a bit wasteful traditional style | |
48 | */ | |
49 | #ifndef FLEX_ARRAY | |
50 | # define FLEX_ARRAY 1 | |
51 | #endif | |
52 | #endif | |
53 | ||
54 | ||
55 | /* | |
56 | * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression. | |
57 | * @cond: the compile-time condition which must be true. | |
58 | * | |
59 | * Your compile will fail if the condition isn't true, or can't be evaluated | |
60 | * by the compiler. This can be used in an expression: its value is "0". | |
61 | * | |
62 | * Example: | |
63 | * #define foo_to_char(foo) \ | |
64 | * ((char *)(foo) \ | |
65 | * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0)) | |
66 | */ | |
67 | #define BUILD_ASSERT_OR_ZERO(cond) \ | |
68 | (sizeof(char [1 - 2*!(cond)]) - 1) | |
69 | ||
70 | #if GIT_GNUC_PREREQ(3, 1) | |
71 | /* &arr[0] degrades to a pointer: a different type from an array */ | |
72 | # define BARF_UNLESS_AN_ARRAY(arr) \ | |
73 | BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \ | |
74 | __typeof__(&(arr)[0]))) | |
75 | #else | |
76 | # define BARF_UNLESS_AN_ARRAY(arr) 0 | |
77 | #endif | |
78 | /* | |
79 | * ARRAY_SIZE - get the number of elements in a visible array | |
80 | * @x: the array whose size you want. | |
81 | * | |
82 | * This does not work on pointers, or arrays declared as [], or | |
83 | * function parameters. With correct compiler support, such usage | |
84 | * will cause a build error (see the build_assert_or_zero macro). | |
85 | */ | |
86 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x)) | |
87 | ||
88 | #define bitsizeof(x) (CHAR_BIT * sizeof(x)) | |
89 | ||
90 | #define maximum_signed_value_of_type(a) \ | |
91 | (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a))) | |
92 | ||
93 | #define maximum_unsigned_value_of_type(a) \ | |
94 | (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a))) | |
95 | ||
96 | /* | |
97 | * Signed integer overflow is undefined in C, so here's a helper macro | |
98 | * to detect if the sum of two integers will overflow. | |
99 | * | |
100 | * Requires: a >= 0, typeof(a) equals typeof(b) | |
101 | */ | |
102 | #define signed_add_overflows(a, b) \ | |
103 | ((b) > maximum_signed_value_of_type(a) - (a)) | |
104 | ||
105 | #define unsigned_add_overflows(a, b) \ | |
106 | ((b) > maximum_unsigned_value_of_type(a) - (a)) | |
107 | ||
108 | /* | |
109 | * Returns true if the multiplication of "a" and "b" will | |
110 | * overflow. The types of "a" and "b" must match and must be unsigned. | |
111 | * Note that this macro evaluates "a" twice! | |
112 | */ | |
113 | #define unsigned_mult_overflows(a, b) \ | |
114 | ((a) && (b) > maximum_unsigned_value_of_type(a) / (a)) | |
115 | ||
116 | #ifdef __GNUC__ | |
117 | #define TYPEOF(x) (__typeof__(x)) | |
118 | #else | |
119 | #define TYPEOF(x) | |
120 | #endif | |
121 | ||
122 | #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits)))) | |
123 | #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ | |
124 | ||
125 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) | |
126 | ||
127 | /* Approximation of the length of the decimal representation of this type. */ | |
128 | #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) | |
129 | ||
130 | #if defined(__sun__) | |
131 | /* | |
132 | * On Solaris, when _XOPEN_EXTENDED is set, its header file | |
133 | * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE | |
134 | * setting to say we are XPG5 or XPG6. Also on Solaris, | |
135 | * XPG6 programs must be compiled with a c99 compiler, while | |
136 | * non XPG6 programs must be compiled with a pre-c99 compiler. | |
137 | */ | |
138 | # if __STDC_VERSION__ - 0 >= 199901L | |
139 | # define _XOPEN_SOURCE 600 | |
140 | # else | |
141 | # define _XOPEN_SOURCE 500 | |
142 | # endif | |
143 | #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ | |
144 | !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ | |
145 | !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ | |
146 | !defined(__CYGWIN__) | |
147 | #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ | |
148 | #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ | |
149 | #endif | |
150 | #define _ALL_SOURCE 1 | |
151 | #define _GNU_SOURCE 1 | |
152 | #define _BSD_SOURCE 1 | |
153 | #define _DEFAULT_SOURCE 1 | |
154 | #define _NETBSD_SOURCE 1 | |
155 | #define _SGI_SOURCE 1 | |
156 | ||
157 | #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ | |
158 | # if !defined(_WIN32_WINNT) | |
159 | # define _WIN32_WINNT 0x0600 | |
160 | # endif | |
161 | #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ | |
162 | #include <winsock2.h> | |
163 | #include <windows.h> | |
164 | #define GIT_WINDOWS_NATIVE | |
165 | #endif | |
166 | ||
167 | #include <unistd.h> | |
168 | #include <stdio.h> | |
169 | #include <sys/stat.h> | |
170 | #include <fcntl.h> | |
171 | #include <stddef.h> | |
172 | #include <stdlib.h> | |
173 | #include <stdarg.h> | |
174 | #include <string.h> | |
175 | #ifdef HAVE_STRINGS_H | |
176 | #include <strings.h> /* for strcasecmp() */ | |
177 | #endif | |
178 | #include <errno.h> | |
179 | #include <limits.h> | |
180 | #ifdef NEEDS_SYS_PARAM_H | |
181 | #include <sys/param.h> | |
182 | #endif | |
183 | #include <sys/types.h> | |
184 | #include <dirent.h> | |
185 | #include <sys/time.h> | |
186 | #include <time.h> | |
187 | #include <signal.h> | |
188 | #include <assert.h> | |
189 | #include <regex.h> | |
190 | #include <utime.h> | |
191 | #include <syslog.h> | |
192 | #if !defined(NO_POLL_H) | |
193 | #include <poll.h> | |
194 | #elif !defined(NO_SYS_POLL_H) | |
195 | #include <sys/poll.h> | |
196 | #else | |
197 | /* Pull the compat stuff */ | |
198 | #include <poll.h> | |
199 | #endif | |
200 | #ifdef HAVE_BSD_SYSCTL | |
201 | #include <sys/sysctl.h> | |
202 | #endif | |
203 | ||
204 | #if defined(__CYGWIN__) | |
205 | #include "compat/win32/path-utils.h" | |
206 | #endif | |
207 | #if defined(__MINGW32__) | |
208 | /* pull in Windows compatibility stuff */ | |
209 | #include "compat/win32/path-utils.h" | |
210 | #include "compat/mingw.h" | |
211 | #elif defined(_MSC_VER) | |
212 | #include "compat/win32/path-utils.h" | |
213 | #include "compat/msvc.h" | |
214 | #else | |
215 | #include <sys/utsname.h> | |
216 | #include <sys/wait.h> | |
217 | #include <sys/resource.h> | |
218 | #include <sys/socket.h> | |
219 | #include <sys/ioctl.h> | |
220 | #include <termios.h> | |
221 | #ifndef NO_SYS_SELECT_H | |
222 | #include <sys/select.h> | |
223 | #endif | |
224 | #include <netinet/in.h> | |
225 | #include <netinet/tcp.h> | |
226 | #include <arpa/inet.h> | |
227 | #include <netdb.h> | |
228 | #include <pwd.h> | |
229 | #include <sys/un.h> | |
230 | #ifndef NO_INTTYPES_H | |
231 | #include <inttypes.h> | |
232 | #else | |
233 | #include <stdint.h> | |
234 | #endif | |
235 | #ifdef NO_INTPTR_T | |
236 | /* | |
237 | * On I16LP32, ILP32 and LP64 "long" is the safe bet, however | |
238 | * on LLP86, IL33LLP64 and P64 it needs to be "long long", | |
239 | * while on IP16 and IP16L32 it is "int" (resp. "short") | |
240 | * Size needs to match (or exceed) 'sizeof(void *)'. | |
241 | * We can't take "long long" here as not everybody has it. | |
242 | */ | |
243 | typedef long intptr_t; | |
244 | typedef unsigned long uintptr_t; | |
245 | #endif | |
246 | #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ | |
247 | #include <grp.h> | |
248 | #define _ALL_SOURCE 1 | |
249 | #endif | |
250 | ||
251 | /* used on Mac OS X */ | |
252 | #ifdef PRECOMPOSE_UNICODE | |
253 | #include "compat/precompose_utf8.h" | |
254 | #else | |
255 | static inline void precompose_argv(int argc, const char **argv) | |
256 | { | |
257 | ; /* nothing */ | |
258 | } | |
259 | #define probe_utf8_pathname_composition() | |
260 | #endif | |
261 | ||
262 | #ifdef MKDIR_WO_TRAILING_SLASH | |
263 | #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) | |
264 | int compat_mkdir_wo_trailing_slash(const char*, mode_t); | |
265 | #endif | |
266 | ||
267 | #ifdef NO_STRUCT_ITIMERVAL | |
268 | struct itimerval { | |
269 | struct timeval it_interval; | |
270 | struct timeval it_value; | |
271 | }; | |
272 | #endif | |
273 | ||
274 | #ifdef NO_SETITIMER | |
275 | static inline int setitimer(int which, const struct itimerval *value, struct itimerval *newvalue) { | |
276 | ; /* nothing */ | |
277 | } | |
278 | #endif | |
279 | ||
280 | #ifndef NO_LIBGEN_H | |
281 | #include <libgen.h> | |
282 | #else | |
283 | #define basename gitbasename | |
284 | char *gitbasename(char *); | |
285 | #define dirname gitdirname | |
286 | char *gitdirname(char *); | |
287 | #endif | |
288 | ||
289 | #ifndef NO_ICONV | |
290 | #include <iconv.h> | |
291 | #endif | |
292 | ||
293 | #ifndef NO_OPENSSL | |
294 | #ifdef __APPLE__ | |
295 | #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 | |
296 | #include <AvailabilityMacros.h> | |
297 | #undef DEPRECATED_ATTRIBUTE | |
298 | #define DEPRECATED_ATTRIBUTE | |
299 | #undef __AVAILABILITY_MACROS_USES_AVAILABILITY | |
300 | #endif | |
301 | #include <openssl/ssl.h> | |
302 | #include <openssl/err.h> | |
303 | #endif | |
304 | ||
305 | #ifdef HAVE_SYSINFO | |
306 | # include <sys/sysinfo.h> | |
307 | #endif | |
308 | ||
309 | /* On most systems <netdb.h> would have given us this, but | |
310 | * not on some systems (e.g. z/OS). | |
311 | */ | |
312 | #ifndef NI_MAXHOST | |
313 | #define NI_MAXHOST 1025 | |
314 | #endif | |
315 | ||
316 | #ifndef NI_MAXSERV | |
317 | #define NI_MAXSERV 32 | |
318 | #endif | |
319 | ||
320 | /* On most systems <limits.h> would have given us this, but | |
321 | * not on some systems (e.g. GNU/Hurd). | |
322 | */ | |
323 | #ifndef PATH_MAX | |
324 | #define PATH_MAX 4096 | |
325 | #endif | |
326 | ||
327 | typedef uintmax_t timestamp_t; | |
328 | #define PRItime PRIuMAX | |
329 | #define parse_timestamp strtoumax | |
330 | #define TIME_MAX UINTMAX_MAX | |
331 | #define TIME_MIN 0 | |
332 | ||
333 | #ifndef PATH_SEP | |
334 | #define PATH_SEP ':' | |
335 | #endif | |
336 | ||
337 | #ifdef HAVE_PATHS_H | |
338 | #include <paths.h> | |
339 | #endif | |
340 | #ifndef _PATH_DEFPATH | |
341 | #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" | |
342 | #endif | |
343 | ||
344 | #ifndef platform_core_config | |
345 | static inline int noop_core_config(const char *var, const char *value, void *cb) | |
346 | { | |
347 | return 0; | |
348 | } | |
349 | #define platform_core_config noop_core_config | |
350 | #endif | |
351 | ||
352 | #ifndef has_dos_drive_prefix | |
353 | static inline int git_has_dos_drive_prefix(const char *path) | |
354 | { | |
355 | return 0; | |
356 | } | |
357 | #define has_dos_drive_prefix git_has_dos_drive_prefix | |
358 | #endif | |
359 | ||
360 | #ifndef skip_dos_drive_prefix | |
361 | static inline int git_skip_dos_drive_prefix(char **path) | |
362 | { | |
363 | return 0; | |
364 | } | |
365 | #define skip_dos_drive_prefix git_skip_dos_drive_prefix | |
366 | #endif | |
367 | ||
368 | #ifndef is_dir_sep | |
369 | static inline int git_is_dir_sep(int c) | |
370 | { | |
371 | return c == '/'; | |
372 | } | |
373 | #define is_dir_sep git_is_dir_sep | |
374 | #endif | |
375 | ||
376 | #ifndef offset_1st_component | |
377 | static inline int git_offset_1st_component(const char *path) | |
378 | { | |
379 | return is_dir_sep(path[0]); | |
380 | } | |
381 | #define offset_1st_component git_offset_1st_component | |
382 | #endif | |
383 | ||
384 | #ifndef is_valid_path | |
385 | #define is_valid_path(path) 1 | |
386 | #endif | |
387 | ||
388 | #ifndef find_last_dir_sep | |
389 | static inline char *git_find_last_dir_sep(const char *path) | |
390 | { | |
391 | return strrchr(path, '/'); | |
392 | } | |
393 | #define find_last_dir_sep git_find_last_dir_sep | |
394 | #endif | |
395 | ||
396 | #ifndef has_dir_sep | |
397 | static inline int git_has_dir_sep(const char *path) | |
398 | { | |
399 | return !!strchr(path, '/'); | |
400 | } | |
401 | #define has_dir_sep(path) git_has_dir_sep(path) | |
402 | #endif | |
403 | ||
404 | #ifndef query_user_email | |
405 | #define query_user_email() NULL | |
406 | #endif | |
407 | ||
408 | #ifdef __TANDEM | |
409 | #include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)> | |
410 | #include <floss.h(floss_getpwuid)> | |
411 | #ifndef NSIG | |
412 | /* | |
413 | * NonStop NSE and NSX do not provide NSIG. SIGGUARDIAN(99) is the highest | |
414 | * known, by detective work using kill -l as a list is all signals | |
415 | * instead of signal.h where it should be. | |
416 | */ | |
417 | # define NSIG 100 | |
418 | #endif | |
419 | #endif | |
420 | ||
421 | #if defined(__HP_cc) && (__HP_cc >= 61000) | |
422 | #define NORETURN __attribute__((noreturn)) | |
423 | #define NORETURN_PTR | |
424 | #elif defined(__GNUC__) && !defined(NO_NORETURN) | |
425 | #define NORETURN __attribute__((__noreturn__)) | |
426 | #define NORETURN_PTR __attribute__((__noreturn__)) | |
427 | #elif defined(_MSC_VER) | |
428 | #define NORETURN __declspec(noreturn) | |
429 | #define NORETURN_PTR | |
430 | #else | |
431 | #define NORETURN | |
432 | #define NORETURN_PTR | |
433 | #ifndef __GNUC__ | |
434 | #ifndef __attribute__ | |
435 | #define __attribute__(x) | |
436 | #endif | |
437 | #endif | |
438 | #endif | |
439 | ||
440 | /* The sentinel attribute is valid from gcc version 4.0 */ | |
441 | #if defined(__GNUC__) && (__GNUC__ >= 4) | |
442 | #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) | |
443 | #else | |
444 | #define LAST_ARG_MUST_BE_NULL | |
445 | #endif | |
446 | ||
447 | #define MAYBE_UNUSED __attribute__((__unused__)) | |
448 | ||
449 | #include "compat/bswap.h" | |
450 | ||
451 | #include "wildmatch.h" | |
452 | ||
453 | struct strbuf; | |
454 | ||
455 | /* General helper functions */ | |
456 | void vreportf(const char *prefix, const char *err, va_list params); | |
457 | NORETURN void usage(const char *err); | |
458 | NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
459 | NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
460 | NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
461 | int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
462 | int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
463 | void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
464 | void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
465 | ||
466 | #ifndef NO_OPENSSL | |
467 | #ifdef APPLE_COMMON_CRYPTO | |
468 | #include "compat/apple-common-crypto.h" | |
469 | #else | |
470 | #include <openssl/evp.h> | |
471 | #include <openssl/hmac.h> | |
472 | #endif /* APPLE_COMMON_CRYPTO */ | |
473 | #include <openssl/x509v3.h> | |
474 | #endif /* NO_OPENSSL */ | |
475 | ||
476 | /* | |
477 | * Let callers be aware of the constant return value; this can help | |
478 | * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, | |
479 | * because some compilers may not support variadic macros. Since we're only | |
480 | * trying to help gcc, anyway, it's OK; other compilers will fall back to | |
481 | * using the function as usual. | |
482 | */ | |
483 | #if defined(__GNUC__) | |
484 | static inline int const_error(void) | |
485 | { | |
486 | return -1; | |
487 | } | |
488 | #define error(...) (error(__VA_ARGS__), const_error()) | |
489 | #define error_errno(...) (error_errno(__VA_ARGS__), const_error()) | |
490 | #endif | |
491 | ||
492 | typedef void (*report_fn)(const char *, va_list params); | |
493 | ||
494 | void set_die_routine(NORETURN_PTR report_fn routine); | |
495 | void set_error_routine(report_fn routine); | |
496 | report_fn get_error_routine(void); | |
497 | void set_warn_routine(report_fn routine); | |
498 | report_fn get_warn_routine(void); | |
499 | void set_die_is_recursing_routine(int (*routine)(void)); | |
500 | ||
501 | int starts_with(const char *str, const char *prefix); | |
502 | int istarts_with(const char *str, const char *prefix); | |
503 | ||
504 | /* | |
505 | * If the string "str" begins with the string found in "prefix", return 1. | |
506 | * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in | |
507 | * the string right after the prefix). | |
508 | * | |
509 | * Otherwise, return 0 and leave "out" untouched. | |
510 | * | |
511 | * Examples: | |
512 | * | |
513 | * [extract branch name, fail if not a branch] | |
514 | * if (!skip_prefix(ref, "refs/heads/", &branch) | |
515 | * return -1; | |
516 | * | |
517 | * [skip prefix if present, otherwise use whole string] | |
518 | * skip_prefix(name, "refs/heads/", &name); | |
519 | */ | |
520 | static inline int skip_prefix(const char *str, const char *prefix, | |
521 | const char **out) | |
522 | { | |
523 | do { | |
524 | if (!*prefix) { | |
525 | *out = str; | |
526 | return 1; | |
527 | } | |
528 | } while (*str++ == *prefix++); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /* | |
533 | * If the string "str" is the same as the string in "prefix", then the "arg" | |
534 | * parameter is set to the "def" parameter and 1 is returned. | |
535 | * If the string "str" begins with the string found in "prefix" and then a | |
536 | * "=" sign, then the "arg" parameter is set to "str + strlen(prefix) + 1" | |
537 | * (i.e., to the point in the string right after the prefix and the "=" sign), | |
538 | * and 1 is returned. | |
539 | * | |
540 | * Otherwise, return 0 and leave "arg" untouched. | |
541 | * | |
542 | * When we accept both a "--key" and a "--key=<val>" option, this function | |
543 | * can be used instead of !strcmp(arg, "--key") and then | |
544 | * skip_prefix(arg, "--key=", &arg) to parse such an option. | |
545 | */ | |
546 | int skip_to_optional_arg_default(const char *str, const char *prefix, | |
547 | const char **arg, const char *def); | |
548 | ||
549 | static inline int skip_to_optional_arg(const char *str, const char *prefix, | |
550 | const char **arg) | |
551 | { | |
552 | return skip_to_optional_arg_default(str, prefix, arg, ""); | |
553 | } | |
554 | ||
555 | /* | |
556 | * Like skip_prefix, but promises never to read past "len" bytes of the input | |
557 | * buffer, and returns the remaining number of bytes in "out" via "outlen". | |
558 | */ | |
559 | static inline int skip_prefix_mem(const char *buf, size_t len, | |
560 | const char *prefix, | |
561 | const char **out, size_t *outlen) | |
562 | { | |
563 | size_t prefix_len = strlen(prefix); | |
564 | if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) { | |
565 | *out = buf + prefix_len; | |
566 | *outlen = len - prefix_len; | |
567 | return 1; | |
568 | } | |
569 | return 0; | |
570 | } | |
571 | ||
572 | /* | |
573 | * If buf ends with suffix, return 1 and subtract the length of the suffix | |
574 | * from *len. Otherwise, return 0 and leave *len untouched. | |
575 | */ | |
576 | static inline int strip_suffix_mem(const char *buf, size_t *len, | |
577 | const char *suffix) | |
578 | { | |
579 | size_t suflen = strlen(suffix); | |
580 | if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) | |
581 | return 0; | |
582 | *len -= suflen; | |
583 | return 1; | |
584 | } | |
585 | ||
586 | /* | |
587 | * If str ends with suffix, return 1 and set *len to the size of the string | |
588 | * without the suffix. Otherwise, return 0 and set *len to the size of the | |
589 | * string. | |
590 | * | |
591 | * Note that we do _not_ NUL-terminate str to the new length. | |
592 | */ | |
593 | static inline int strip_suffix(const char *str, const char *suffix, size_t *len) | |
594 | { | |
595 | *len = strlen(str); | |
596 | return strip_suffix_mem(str, len, suffix); | |
597 | } | |
598 | ||
599 | static inline int ends_with(const char *str, const char *suffix) | |
600 | { | |
601 | size_t len; | |
602 | return strip_suffix(str, suffix, &len); | |
603 | } | |
604 | ||
605 | #define SWAP(a, b) do { \ | |
606 | void *_swap_a_ptr = &(a); \ | |
607 | void *_swap_b_ptr = &(b); \ | |
608 | unsigned char _swap_buffer[sizeof(a)]; \ | |
609 | memcpy(_swap_buffer, _swap_a_ptr, sizeof(a)); \ | |
610 | memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) + \ | |
611 | BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b))); \ | |
612 | memcpy(_swap_b_ptr, _swap_buffer, sizeof(a)); \ | |
613 | } while (0) | |
614 | ||
615 | #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) | |
616 | ||
617 | #ifndef PROT_READ | |
618 | #define PROT_READ 1 | |
619 | #define PROT_WRITE 2 | |
620 | #define MAP_PRIVATE 1 | |
621 | #endif | |
622 | ||
623 | #define mmap git_mmap | |
624 | #define munmap git_munmap | |
625 | void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
626 | int git_munmap(void *start, size_t length); | |
627 | ||
628 | #else /* NO_MMAP || USE_WIN32_MMAP */ | |
629 | ||
630 | #include <sys/mman.h> | |
631 | ||
632 | #endif /* NO_MMAP || USE_WIN32_MMAP */ | |
633 | ||
634 | #ifdef NO_MMAP | |
635 | ||
636 | /* This value must be multiple of (pagesize * 2) */ | |
637 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) | |
638 | ||
639 | #else /* NO_MMAP */ | |
640 | ||
641 | /* This value must be multiple of (pagesize * 2) */ | |
642 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ | |
643 | (sizeof(void*) >= 8 \ | |
644 | ? 1 * 1024 * 1024 * 1024 \ | |
645 | : 32 * 1024 * 1024) | |
646 | ||
647 | #endif /* NO_MMAP */ | |
648 | ||
649 | #ifndef MAP_FAILED | |
650 | #define MAP_FAILED ((void *)-1) | |
651 | #endif | |
652 | ||
653 | #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT | |
654 | #define on_disk_bytes(st) ((st).st_size) | |
655 | #else | |
656 | #define on_disk_bytes(st) ((st).st_blocks * 512) | |
657 | #endif | |
658 | ||
659 | #ifdef NEEDS_MODE_TRANSLATION | |
660 | #undef S_IFMT | |
661 | #undef S_IFREG | |
662 | #undef S_IFDIR | |
663 | #undef S_IFLNK | |
664 | #undef S_IFBLK | |
665 | #undef S_IFCHR | |
666 | #undef S_IFIFO | |
667 | #undef S_IFSOCK | |
668 | #define S_IFMT 0170000 | |
669 | #define S_IFREG 0100000 | |
670 | #define S_IFDIR 0040000 | |
671 | #define S_IFLNK 0120000 | |
672 | #define S_IFBLK 0060000 | |
673 | #define S_IFCHR 0020000 | |
674 | #define S_IFIFO 0010000 | |
675 | #define S_IFSOCK 0140000 | |
676 | #ifdef stat | |
677 | #undef stat | |
678 | #endif | |
679 | #define stat(path, buf) git_stat(path, buf) | |
680 | int git_stat(const char *, struct stat *); | |
681 | #ifdef fstat | |
682 | #undef fstat | |
683 | #endif | |
684 | #define fstat(fd, buf) git_fstat(fd, buf) | |
685 | int git_fstat(int, struct stat *); | |
686 | #ifdef lstat | |
687 | #undef lstat | |
688 | #endif | |
689 | #define lstat(path, buf) git_lstat(path, buf) | |
690 | int git_lstat(const char *, struct stat *); | |
691 | #endif | |
692 | ||
693 | #define DEFAULT_PACKED_GIT_LIMIT \ | |
694 | ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? (32 * 1024L * 1024L) : 256)) | |
695 | ||
696 | #ifdef NO_PREAD | |
697 | #define pread git_pread | |
698 | ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); | |
699 | #endif | |
700 | /* | |
701 | * Forward decl that will remind us if its twin in cache.h changes. | |
702 | * This function is used in compat/pread.c. But we can't include | |
703 | * cache.h there. | |
704 | */ | |
705 | ssize_t read_in_full(int fd, void *buf, size_t count); | |
706 | ||
707 | #ifdef NO_SETENV | |
708 | #define setenv gitsetenv | |
709 | int gitsetenv(const char *, const char *, int); | |
710 | #endif | |
711 | ||
712 | #ifdef NO_MKDTEMP | |
713 | #define mkdtemp gitmkdtemp | |
714 | char *gitmkdtemp(char *); | |
715 | #endif | |
716 | ||
717 | #ifdef NO_UNSETENV | |
718 | #define unsetenv gitunsetenv | |
719 | void gitunsetenv(const char *); | |
720 | #endif | |
721 | ||
722 | #ifdef NO_STRCASESTR | |
723 | #define strcasestr gitstrcasestr | |
724 | char *gitstrcasestr(const char *haystack, const char *needle); | |
725 | #endif | |
726 | ||
727 | #ifdef NO_STRLCPY | |
728 | #define strlcpy gitstrlcpy | |
729 | size_t gitstrlcpy(char *, const char *, size_t); | |
730 | #endif | |
731 | ||
732 | #ifdef NO_STRTOUMAX | |
733 | #define strtoumax gitstrtoumax | |
734 | uintmax_t gitstrtoumax(const char *, char **, int); | |
735 | #define strtoimax gitstrtoimax | |
736 | intmax_t gitstrtoimax(const char *, char **, int); | |
737 | #endif | |
738 | ||
739 | #ifdef NO_HSTRERROR | |
740 | #define hstrerror githstrerror | |
741 | const char *githstrerror(int herror); | |
742 | #endif | |
743 | ||
744 | #ifdef NO_MEMMEM | |
745 | #define memmem gitmemmem | |
746 | void *gitmemmem(const void *haystack, size_t haystacklen, | |
747 | const void *needle, size_t needlelen); | |
748 | #endif | |
749 | ||
750 | #ifdef OVERRIDE_STRDUP | |
751 | #ifdef strdup | |
752 | #undef strdup | |
753 | #endif | |
754 | #define strdup gitstrdup | |
755 | char *gitstrdup(const char *s); | |
756 | #endif | |
757 | ||
758 | #ifdef NO_GETPAGESIZE | |
759 | #define getpagesize() sysconf(_SC_PAGESIZE) | |
760 | #endif | |
761 | ||
762 | #ifndef O_CLOEXEC | |
763 | #define O_CLOEXEC 0 | |
764 | #endif | |
765 | ||
766 | #ifdef FREAD_READS_DIRECTORIES | |
767 | # if !defined(SUPPRESS_FOPEN_REDEFINITION) | |
768 | # ifdef fopen | |
769 | # undef fopen | |
770 | # endif | |
771 | # define fopen(a,b) git_fopen(a,b) | |
772 | # endif | |
773 | FILE *git_fopen(const char*, const char*); | |
774 | #endif | |
775 | ||
776 | #ifdef SNPRINTF_RETURNS_BOGUS | |
777 | #ifdef snprintf | |
778 | #undef snprintf | |
779 | #endif | |
780 | #define snprintf git_snprintf | |
781 | int git_snprintf(char *str, size_t maxsize, | |
782 | const char *format, ...); | |
783 | #ifdef vsnprintf | |
784 | #undef vsnprintf | |
785 | #endif | |
786 | #define vsnprintf git_vsnprintf | |
787 | int git_vsnprintf(char *str, size_t maxsize, | |
788 | const char *format, va_list ap); | |
789 | #endif | |
790 | ||
791 | #ifdef __GLIBC_PREREQ | |
792 | #if __GLIBC_PREREQ(2, 1) | |
793 | #define HAVE_STRCHRNUL | |
794 | #endif | |
795 | #endif | |
796 | ||
797 | #ifndef HAVE_STRCHRNUL | |
798 | #define strchrnul gitstrchrnul | |
799 | static inline char *gitstrchrnul(const char *s, int c) | |
800 | { | |
801 | while (*s && *s != c) | |
802 | s++; | |
803 | return (char *)s; | |
804 | } | |
805 | #endif | |
806 | ||
807 | #ifdef NO_INET_PTON | |
808 | int inet_pton(int af, const char *src, void *dst); | |
809 | #endif | |
810 | ||
811 | #ifdef NO_INET_NTOP | |
812 | const char *inet_ntop(int af, const void *src, char *dst, size_t size); | |
813 | #endif | |
814 | ||
815 | #ifdef NO_PTHREADS | |
816 | #define atexit git_atexit | |
817 | int git_atexit(void (*handler)(void)); | |
818 | #endif | |
819 | ||
820 | static inline size_t st_add(size_t a, size_t b) | |
821 | { | |
822 | if (unsigned_add_overflows(a, b)) | |
823 | die("size_t overflow: %"PRIuMAX" + %"PRIuMAX, | |
824 | (uintmax_t)a, (uintmax_t)b); | |
825 | return a + b; | |
826 | } | |
827 | #define st_add3(a,b,c) st_add(st_add((a),(b)),(c)) | |
828 | #define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d)) | |
829 | ||
830 | static inline size_t st_mult(size_t a, size_t b) | |
831 | { | |
832 | if (unsigned_mult_overflows(a, b)) | |
833 | die("size_t overflow: %"PRIuMAX" * %"PRIuMAX, | |
834 | (uintmax_t)a, (uintmax_t)b); | |
835 | return a * b; | |
836 | } | |
837 | ||
838 | static inline size_t st_sub(size_t a, size_t b) | |
839 | { | |
840 | if (a < b) | |
841 | die("size_t underflow: %"PRIuMAX" - %"PRIuMAX, | |
842 | (uintmax_t)a, (uintmax_t)b); | |
843 | return a - b; | |
844 | } | |
845 | ||
846 | #ifdef HAVE_ALLOCA_H | |
847 | # include <alloca.h> | |
848 | # define xalloca(size) (alloca(size)) | |
849 | # define xalloca_free(p) do {} while (0) | |
850 | #else | |
851 | # define xalloca(size) (xmalloc(size)) | |
852 | # define xalloca_free(p) (free(p)) | |
853 | #endif | |
854 | char *xstrdup(const char *str); | |
855 | void *xmalloc(size_t size); | |
856 | void *xmallocz(size_t size); | |
857 | void *xmallocz_gently(size_t size); | |
858 | void *xmemdupz(const void *data, size_t len); | |
859 | char *xstrndup(const char *str, size_t len); | |
860 | void *xrealloc(void *ptr, size_t size); | |
861 | void *xcalloc(size_t nmemb, size_t size); | |
862 | void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
863 | void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
864 | int xopen(const char *path, int flags, ...); | |
865 | ssize_t xread(int fd, void *buf, size_t len); | |
866 | ssize_t xwrite(int fd, const void *buf, size_t len); | |
867 | ssize_t xpread(int fd, void *buf, size_t len, off_t offset); | |
868 | int xdup(int fd); | |
869 | FILE *xfopen(const char *path, const char *mode); | |
870 | FILE *xfdopen(int fd, const char *mode); | |
871 | int xmkstemp(char *temp_filename); | |
872 | int xmkstemp_mode(char *temp_filename, int mode); | |
873 | char *xgetcwd(void); | |
874 | FILE *fopen_for_writing(const char *path); | |
875 | FILE *fopen_or_warn(const char *path, const char *mode); | |
876 | ||
877 | /* | |
878 | * Like strncmp, but only return zero if s is NUL-terminated and exactly len | |
879 | * characters long. If it is not, consider it greater than t. | |
880 | */ | |
881 | int xstrncmpz(const char *s, const char *t, size_t len); | |
882 | ||
883 | /* | |
884 | * FREE_AND_NULL(ptr) is like free(ptr) followed by ptr = NULL. Note | |
885 | * that ptr is used twice, so don't pass e.g. ptr++. | |
886 | */ | |
887 | #define FREE_AND_NULL(p) do { free(p); (p) = NULL; } while (0) | |
888 | ||
889 | #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) | |
890 | #define CALLOC_ARRAY(x, alloc) (x) = xcalloc((alloc), sizeof(*(x))); | |
891 | #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) | |
892 | ||
893 | #define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \ | |
894 | BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) | |
895 | static inline void copy_array(void *dst, const void *src, size_t n, size_t size) | |
896 | { | |
897 | if (n) | |
898 | memcpy(dst, src, st_mult(size, n)); | |
899 | } | |
900 | ||
901 | #define MOVE_ARRAY(dst, src, n) move_array((dst), (src), (n), sizeof(*(dst)) + \ | |
902 | BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) | |
903 | static inline void move_array(void *dst, const void *src, size_t n, size_t size) | |
904 | { | |
905 | if (n) | |
906 | memmove(dst, src, st_mult(size, n)); | |
907 | } | |
908 | ||
909 | /* | |
910 | * These functions help you allocate structs with flex arrays, and copy | |
911 | * the data directly into the array. For example, if you had: | |
912 | * | |
913 | * struct foo { | |
914 | * int bar; | |
915 | * char name[FLEX_ARRAY]; | |
916 | * }; | |
917 | * | |
918 | * you can do: | |
919 | * | |
920 | * struct foo *f; | |
921 | * FLEX_ALLOC_MEM(f, name, src, len); | |
922 | * | |
923 | * to allocate a "foo" with the contents of "src" in the "name" field. | |
924 | * The resulting struct is automatically zero'd, and the flex-array field | |
925 | * is NUL-terminated (whether the incoming src buffer was or not). | |
926 | * | |
927 | * The FLEXPTR_* variants operate on structs that don't use flex-arrays, | |
928 | * but do want to store a pointer to some extra data in the same allocated | |
929 | * block. For example, if you have: | |
930 | * | |
931 | * struct foo { | |
932 | * char *name; | |
933 | * int bar; | |
934 | * }; | |
935 | * | |
936 | * you can do: | |
937 | * | |
938 | * struct foo *f; | |
939 | * FLEXPTR_ALLOC_STR(f, name, src); | |
940 | * | |
941 | * and "name" will point to a block of memory after the struct, which will be | |
942 | * freed along with the struct (but the pointer can be repointed anywhere). | |
943 | * | |
944 | * The *_STR variants accept a string parameter rather than a ptr/len | |
945 | * combination. | |
946 | * | |
947 | * Note that these macros will evaluate the first parameter multiple | |
948 | * times, and it must be assignable as an lvalue. | |
949 | */ | |
950 | #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ | |
951 | size_t flex_array_len_ = (len); \ | |
952 | (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ | |
953 | memcpy((void *)(x)->flexname, (buf), flex_array_len_); \ | |
954 | } while (0) | |
955 | #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ | |
956 | size_t flex_array_len_ = (len); \ | |
957 | (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ | |
958 | memcpy((x) + 1, (buf), flex_array_len_); \ | |
959 | (x)->ptrname = (void *)((x)+1); \ | |
960 | } while(0) | |
961 | #define FLEX_ALLOC_STR(x, flexname, str) \ | |
962 | FLEX_ALLOC_MEM((x), flexname, (str), strlen(str)) | |
963 | #define FLEXPTR_ALLOC_STR(x, ptrname, str) \ | |
964 | FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) | |
965 | ||
966 | static inline char *xstrdup_or_null(const char *str) | |
967 | { | |
968 | return str ? xstrdup(str) : NULL; | |
969 | } | |
970 | ||
971 | static inline size_t xsize_t(off_t len) | |
972 | { | |
973 | size_t size = (size_t) len; | |
974 | ||
975 | if (len != (off_t) size) | |
976 | die("Cannot handle files this big"); | |
977 | return size; | |
978 | } | |
979 | ||
980 | __attribute__((format (printf, 3, 4))) | |
981 | int xsnprintf(char *dst, size_t max, const char *fmt, ...); | |
982 | ||
983 | #ifndef HOST_NAME_MAX | |
984 | #define HOST_NAME_MAX 256 | |
985 | #endif | |
986 | ||
987 | int xgethostname(char *buf, size_t len); | |
988 | ||
989 | /* in ctype.c, for kwset users */ | |
990 | extern const unsigned char tolower_trans_tbl[256]; | |
991 | ||
992 | /* Sane ctype - no locale, and works with signed chars */ | |
993 | #undef isascii | |
994 | #undef isspace | |
995 | #undef isdigit | |
996 | #undef isalpha | |
997 | #undef isalnum | |
998 | #undef isprint | |
999 | #undef islower | |
1000 | #undef isupper | |
1001 | #undef tolower | |
1002 | #undef toupper | |
1003 | #undef iscntrl | |
1004 | #undef ispunct | |
1005 | #undef isxdigit | |
1006 | ||
1007 | extern const unsigned char sane_ctype[256]; | |
1008 | #define GIT_SPACE 0x01 | |
1009 | #define GIT_DIGIT 0x02 | |
1010 | #define GIT_ALPHA 0x04 | |
1011 | #define GIT_GLOB_SPECIAL 0x08 | |
1012 | #define GIT_REGEX_SPECIAL 0x10 | |
1013 | #define GIT_PATHSPEC_MAGIC 0x20 | |
1014 | #define GIT_CNTRL 0x40 | |
1015 | #define GIT_PUNCT 0x80 | |
1016 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | |
1017 | #define isascii(x) (((x) & ~0x7f) == 0) | |
1018 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
1019 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
1020 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
1021 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
1022 | #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) | |
1023 | #define islower(x) sane_iscase(x, 1) | |
1024 | #define isupper(x) sane_iscase(x, 0) | |
1025 | #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) | |
1026 | #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) | |
1027 | #define iscntrl(x) (sane_istest(x,GIT_CNTRL)) | |
1028 | #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ | |
1029 | GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) | |
1030 | #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) | |
1031 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
1032 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
1033 | #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) | |
1034 | ||
1035 | static inline int sane_case(int x, int high) | |
1036 | { | |
1037 | if (sane_istest(x, GIT_ALPHA)) | |
1038 | x = (x & ~0x20) | high; | |
1039 | return x; | |
1040 | } | |
1041 | ||
1042 | static inline int sane_iscase(int x, int is_lower) | |
1043 | { | |
1044 | if (!sane_istest(x, GIT_ALPHA)) | |
1045 | return 0; | |
1046 | ||
1047 | if (is_lower) | |
1048 | return (x & 0x20) != 0; | |
1049 | else | |
1050 | return (x & 0x20) == 0; | |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * Like skip_prefix, but compare case-insensitively. Note that the comparison | |
1055 | * is done via tolower(), so it is strictly ASCII (no multi-byte characters or | |
1056 | * locale-specific conversions). | |
1057 | */ | |
1058 | static inline int skip_iprefix(const char *str, const char *prefix, | |
1059 | const char **out) | |
1060 | { | |
1061 | do { | |
1062 | if (!*prefix) { | |
1063 | *out = str; | |
1064 | return 1; | |
1065 | } | |
1066 | } while (tolower(*str++) == tolower(*prefix++)); | |
1067 | return 0; | |
1068 | } | |
1069 | ||
1070 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) | |
1071 | { | |
1072 | unsigned long ul; | |
1073 | char *p; | |
1074 | ||
1075 | errno = 0; | |
1076 | /* negative values would be accepted by strtoul */ | |
1077 | if (strchr(s, '-')) | |
1078 | return -1; | |
1079 | ul = strtoul(s, &p, base); | |
1080 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
1081 | return -1; | |
1082 | *result = ul; | |
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | static inline int strtol_i(char const *s, int base, int *result) | |
1087 | { | |
1088 | long ul; | |
1089 | char *p; | |
1090 | ||
1091 | errno = 0; | |
1092 | ul = strtol(s, &p, base); | |
1093 | if (errno || *p || p == s || (int) ul != ul) | |
1094 | return -1; | |
1095 | *result = ul; | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | void git_stable_qsort(void *base, size_t nmemb, size_t size, | |
1100 | int(*compar)(const void *, const void *)); | |
1101 | #ifdef INTERNAL_QSORT | |
1102 | #define qsort git_stable_qsort | |
1103 | #endif | |
1104 | ||
1105 | #define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar) | |
1106 | static inline void sane_qsort(void *base, size_t nmemb, size_t size, | |
1107 | int(*compar)(const void *, const void *)) | |
1108 | { | |
1109 | if (nmemb > 1) | |
1110 | qsort(base, nmemb, size, compar); | |
1111 | } | |
1112 | ||
1113 | #define STABLE_QSORT(base, n, compar) \ | |
1114 | git_stable_qsort((base), (n), sizeof(*(base)), compar) | |
1115 | ||
1116 | #ifndef HAVE_ISO_QSORT_S | |
1117 | int git_qsort_s(void *base, size_t nmemb, size_t size, | |
1118 | int (*compar)(const void *, const void *, void *), void *ctx); | |
1119 | #define qsort_s git_qsort_s | |
1120 | #endif | |
1121 | ||
1122 | #define QSORT_S(base, n, compar, ctx) do { \ | |
1123 | if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \ | |
1124 | BUG("qsort_s() failed"); \ | |
1125 | } while (0) | |
1126 | ||
1127 | #ifndef REG_STARTEND | |
1128 | #error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd" | |
1129 | #endif | |
1130 | ||
1131 | static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size, | |
1132 | size_t nmatch, regmatch_t pmatch[], int eflags) | |
1133 | { | |
1134 | assert(nmatch > 0 && pmatch); | |
1135 | pmatch[0].rm_so = 0; | |
1136 | pmatch[0].rm_eo = size; | |
1137 | return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND); | |
1138 | } | |
1139 | ||
1140 | #ifndef DIR_HAS_BSD_GROUP_SEMANTICS | |
1141 | # define FORCE_DIR_SET_GID S_ISGID | |
1142 | #else | |
1143 | # define FORCE_DIR_SET_GID 0 | |
1144 | #endif | |
1145 | ||
1146 | #ifdef NO_NSEC | |
1147 | #undef USE_NSEC | |
1148 | #define ST_CTIME_NSEC(st) 0 | |
1149 | #define ST_MTIME_NSEC(st) 0 | |
1150 | #else | |
1151 | #ifdef USE_ST_TIMESPEC | |
1152 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) | |
1153 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) | |
1154 | #else | |
1155 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) | |
1156 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) | |
1157 | #endif | |
1158 | #endif | |
1159 | ||
1160 | #ifdef UNRELIABLE_FSTAT | |
1161 | #define fstat_is_reliable() 0 | |
1162 | #else | |
1163 | #define fstat_is_reliable() 1 | |
1164 | #endif | |
1165 | ||
1166 | #ifndef va_copy | |
1167 | /* | |
1168 | * Since an obvious implementation of va_list would be to make it a | |
1169 | * pointer into the stack frame, a simple assignment will work on | |
1170 | * many systems. But let's try to be more portable. | |
1171 | */ | |
1172 | #ifdef __va_copy | |
1173 | #define va_copy(dst, src) __va_copy(dst, src) | |
1174 | #else | |
1175 | #define va_copy(dst, src) ((dst) = (src)) | |
1176 | #endif | |
1177 | #endif | |
1178 | ||
1179 | #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS) | |
1180 | #define HAVE_VARIADIC_MACROS 1 | |
1181 | #endif | |
1182 | ||
1183 | /* usage.c: only to be used for testing BUG() implementation (see test-tool) */ | |
1184 | extern int BUG_exit_code; | |
1185 | ||
1186 | #ifdef HAVE_VARIADIC_MACROS | |
1187 | __attribute__((format (printf, 3, 4))) NORETURN | |
1188 | void BUG_fl(const char *file, int line, const char *fmt, ...); | |
1189 | #define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__) | |
1190 | #else | |
1191 | __attribute__((format (printf, 1, 2))) NORETURN | |
1192 | void BUG(const char *fmt, ...); | |
1193 | #endif | |
1194 | ||
1195 | /* | |
1196 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
1197 | * Returns 0 on success, which includes trying to unlink an object that does | |
1198 | * not exist. | |
1199 | */ | |
1200 | int unlink_or_warn(const char *path); | |
1201 | /* | |
1202 | * Tries to unlink file. Returns 0 if unlink succeeded | |
1203 | * or the file already didn't exist. Returns -1 and | |
1204 | * appends a message to err suitable for | |
1205 | * 'error("%s", err->buf)' on error. | |
1206 | */ | |
1207 | int unlink_or_msg(const char *file, struct strbuf *err); | |
1208 | /* | |
1209 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
1210 | * Returns 0 on success, which includes trying to remove a directory that does | |
1211 | * not exist. | |
1212 | */ | |
1213 | int rmdir_or_warn(const char *path); | |
1214 | /* | |
1215 | * Calls the correct function out of {unlink,rmdir}_or_warn based on | |
1216 | * the supplied file mode. | |
1217 | */ | |
1218 | int remove_or_warn(unsigned int mode, const char *path); | |
1219 | ||
1220 | /* | |
1221 | * Call access(2), but warn for any error except "missing file" | |
1222 | * (ENOENT or ENOTDIR). | |
1223 | */ | |
1224 | #define ACCESS_EACCES_OK (1U << 0) | |
1225 | int access_or_warn(const char *path, int mode, unsigned flag); | |
1226 | int access_or_die(const char *path, int mode, unsigned flag); | |
1227 | ||
1228 | /* Warn on an inaccessible file if errno indicates this is an error */ | |
1229 | int warn_on_fopen_errors(const char *path); | |
1230 | ||
1231 | #if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__) | |
1232 | #define USE_PARENS_AROUND_GETTEXT_N 1 | |
1233 | #endif | |
1234 | ||
1235 | #ifndef SHELL_PATH | |
1236 | # define SHELL_PATH "/bin/sh" | |
1237 | #endif | |
1238 | ||
1239 | #ifndef _POSIX_THREAD_SAFE_FUNCTIONS | |
1240 | static inline void flockfile(FILE *fh) | |
1241 | { | |
1242 | ; /* nothing */ | |
1243 | } | |
1244 | static inline void funlockfile(FILE *fh) | |
1245 | { | |
1246 | ; /* nothing */ | |
1247 | } | |
1248 | #define getc_unlocked(fh) getc(fh) | |
1249 | #endif | |
1250 | ||
1251 | #ifdef FILENO_IS_A_MACRO | |
1252 | int git_fileno(FILE *stream); | |
1253 | # ifndef COMPAT_CODE_FILENO | |
1254 | # undef fileno | |
1255 | # define fileno(p) git_fileno(p) | |
1256 | # endif | |
1257 | #endif | |
1258 | ||
1259 | #ifdef NEED_ACCESS_ROOT_HANDLER | |
1260 | int git_access(const char *path, int mode); | |
1261 | # ifndef COMPAT_CODE_ACCESS | |
1262 | # ifdef access | |
1263 | # undef access | |
1264 | # endif | |
1265 | # define access(path, mode) git_access(path, mode) | |
1266 | # endif | |
1267 | #endif | |
1268 | ||
1269 | /* | |
1270 | * Our code often opens a path to an optional file, to work on its | |
1271 | * contents when we can successfully open it. We can ignore a failure | |
1272 | * to open if such an optional file does not exist, but we do want to | |
1273 | * report a failure in opening for other reasons (e.g. we got an I/O | |
1274 | * error, or the file is there, but we lack the permission to open). | |
1275 | * | |
1276 | * Call this function after seeing an error from open() or fopen() to | |
1277 | * see if the errno indicates a missing file that we can safely ignore. | |
1278 | */ | |
1279 | static inline int is_missing_file_error(int errno_) | |
1280 | { | |
1281 | return (errno_ == ENOENT || errno_ == ENOTDIR); | |
1282 | } | |
1283 | ||
1284 | int cmd_main(int, const char **); | |
1285 | ||
1286 | /* | |
1287 | * Intercept all calls to exit() and route them to trace2 to | |
1288 | * optionally emit a message before calling the real exit(). | |
1289 | */ | |
1290 | int trace2_cmd_exit_fl(const char *file, int line, int code); | |
1291 | #define exit(code) exit(trace2_cmd_exit_fl(__FILE__, __LINE__, (code))) | |
1292 | ||
1293 | /* | |
1294 | * You can mark a stack variable with UNLEAK(var) to avoid it being | |
1295 | * reported as a leak by tools like LSAN or valgrind. The argument | |
1296 | * should generally be the variable itself (not its address and not what | |
1297 | * it points to). It's safe to use this on pointers which may already | |
1298 | * have been freed, or on pointers which may still be in use. | |
1299 | * | |
1300 | * Use this _only_ for a variable that leaks by going out of scope at | |
1301 | * program exit (so only from cmd_* functions or their direct helpers). | |
1302 | * Normal functions, especially those which may be called multiple | |
1303 | * times, should actually free their memory. This is only meant as | |
1304 | * an annotation, and does nothing in non-leak-checking builds. | |
1305 | */ | |
1306 | #ifdef SUPPRESS_ANNOTATED_LEAKS | |
1307 | void unleak_memory(const void *ptr, size_t len); | |
1308 | #define UNLEAK(var) unleak_memory(&(var), sizeof(var)) | |
1309 | #else | |
1310 | #define UNLEAK(var) do {} while (0) | |
1311 | #endif | |
1312 | ||
1313 | /* | |
1314 | * This include must come after system headers, since it introduces macros that | |
1315 | * replace system names. | |
1316 | */ | |
1317 | #include "banned.h" | |
1318 | ||
1319 | /* | |
1320 | * container_of - Get the address of an object containing a field. | |
1321 | * | |
1322 | * @ptr: pointer to the field. | |
1323 | * @type: type of the object. | |
1324 | * @member: name of the field within the object. | |
1325 | */ | |
1326 | #define container_of(ptr, type, member) \ | |
1327 | ((type *) ((char *)(ptr) - offsetof(type, member))) | |
1328 | ||
1329 | /* | |
1330 | * helper function for `container_of_or_null' to avoid multiple | |
1331 | * evaluation of @ptr | |
1332 | */ | |
1333 | static inline void *container_of_or_null_offset(void *ptr, size_t offset) | |
1334 | { | |
1335 | return ptr ? (char *)ptr - offset : NULL; | |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * like `container_of', but allows returned value to be NULL | |
1340 | */ | |
1341 | #define container_of_or_null(ptr, type, member) \ | |
1342 | (type *)container_of_or_null_offset(ptr, offsetof(type, member)) | |
1343 | ||
1344 | /* | |
1345 | * like offsetof(), but takes a pointer to a a variable of type which | |
1346 | * contains @member, instead of a specified type. | |
1347 | * @ptr is subject to multiple evaluation since we can't rely on __typeof__ | |
1348 | * everywhere. | |
1349 | */ | |
1350 | #if defined(__GNUC__) /* clang sets this, too */ | |
1351 | #define OFFSETOF_VAR(ptr, member) offsetof(__typeof__(*ptr), member) | |
1352 | #else /* !__GNUC__ */ | |
1353 | #define OFFSETOF_VAR(ptr, member) \ | |
1354 | ((uintptr_t)&(ptr)->member - (uintptr_t)(ptr)) | |
1355 | #endif /* !__GNUC__ */ | |
1356 | ||
1357 | #endif |