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4050c0df JH |
1 | #ifndef GIT_COMPAT_UTIL_H |
2 | #define GIT_COMPAT_UTIL_H | |
3 | ||
7bc341e2 | 4 | #if __STDC_VERSION__ - 0 < 199901L |
5 | /* | |
6 | * Git is in a testing period for mandatory C99 support in the compiler. If | |
7 | * your compiler is reasonably recent, you can try to enable C99 support (or, | |
8 | * for MSVC, C11 support). If you encounter a problem and can't enable C99 | |
9 | * support with your compiler (such as with "-std=gnu99") and don't have access | |
10 | * to one with this support, such as GCC or Clang, you can remove this #if | |
11 | * directive, but please report the details of your system to | |
12 | * git@vger.kernel.org. | |
13 | */ | |
14 | #error "Required C99 support is in a test phase. Please see git-compat-util.h for more details." | |
15 | #endif | |
16 | ||
556702f8 JH |
17 | #ifdef USE_MSVC_CRTDBG |
18 | /* | |
19 | * For these to work they must appear very early in each | |
20 | * file -- before most of the standard header files. | |
21 | */ | |
22 | #include <stdlib.h> | |
23 | #include <crtdbg.h> | |
24 | #endif | |
25 | ||
b97e9116 MW |
26 | #define _FILE_OFFSET_BITS 64 |
27 | ||
89c855ed EP |
28 | |
29 | /* Derived from Linux "Features Test Macro" header | |
30 | * Convenience macros to test the versions of gcc (or | |
31 | * a compatible compiler). | |
32 | * Use them like this: | |
33 | * #if GIT_GNUC_PREREQ (2,8) | |
34 | * ... code requiring gcc 2.8 or later ... | |
35 | * #endif | |
36 | */ | |
37 | #if defined(__GNUC__) && defined(__GNUC_MINOR__) | |
38 | # define GIT_GNUC_PREREQ(maj, min) \ | |
39 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | |
40 | #else | |
41 | #define GIT_GNUC_PREREQ(maj, min) 0 | |
42 | #endif | |
43 | ||
44 | ||
8f1d2e6f | 45 | #ifndef FLEX_ARRAY |
8e973991 JH |
46 | /* |
47 | * See if our compiler is known to support flexible array members. | |
48 | */ | |
203ee91f | 49 | #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580)) |
8e973991 JH |
50 | # define FLEX_ARRAY /* empty */ |
51 | #elif defined(__GNUC__) | |
52 | # if (__GNUC__ >= 3) | |
53 | # define FLEX_ARRAY /* empty */ | |
54 | # else | |
55 | # define FLEX_ARRAY 0 /* older GNU extension */ | |
56 | # endif | |
57 | #endif | |
58 | ||
59 | /* | |
60 | * Otherwise, default to safer but a bit wasteful traditional style | |
61 | */ | |
62 | #ifndef FLEX_ARRAY | |
63 | # define FLEX_ARRAY 1 | |
8f1d2e6f JH |
64 | #endif |
65 | #endif | |
66 | ||
89c855ed EP |
67 | |
68 | /* | |
69 | * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression. | |
70 | * @cond: the compile-time condition which must be true. | |
71 | * | |
72 | * Your compile will fail if the condition isn't true, or can't be evaluated | |
73 | * by the compiler. This can be used in an expression: its value is "0". | |
74 | * | |
75 | * Example: | |
76 | * #define foo_to_char(foo) \ | |
77 | * ((char *)(foo) \ | |
78 | * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0)) | |
79 | */ | |
80 | #define BUILD_ASSERT_OR_ZERO(cond) \ | |
81 | (sizeof(char [1 - 2*!(cond)]) - 1) | |
82 | ||
e2c6f7cd | 83 | #if GIT_GNUC_PREREQ(3, 1) |
89c855ed EP |
84 | /* &arr[0] degrades to a pointer: a different type from an array */ |
85 | # define BARF_UNLESS_AN_ARRAY(arr) \ | |
86 | BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \ | |
87 | __typeof__(&(arr)[0]))) | |
e2c6f7cd CB |
88 | #else |
89 | # define BARF_UNLESS_AN_ARRAY(arr) 0 | |
89c855ed EP |
90 | #endif |
91 | /* | |
92 | * ARRAY_SIZE - get the number of elements in a visible array | |
68b69211 | 93 | * @x: the array whose size you want. |
89c855ed EP |
94 | * |
95 | * This does not work on pointers, or arrays declared as [], or | |
96 | * function parameters. With correct compiler support, such usage | |
97 | * will cause a build error (see the build_assert_or_zero macro). | |
98 | */ | |
99 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x)) | |
100 | ||
f630cfda | 101 | #define bitsizeof(x) (CHAR_BIT * sizeof(x)) |
b4f2a6ac | 102 | |
c03c8315 EFL |
103 | #define maximum_signed_value_of_type(a) \ |
104 | (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a))) | |
105 | ||
1368f650 JN |
106 | #define maximum_unsigned_value_of_type(a) \ |
107 | (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a))) | |
108 | ||
c03c8315 EFL |
109 | /* |
110 | * Signed integer overflow is undefined in C, so here's a helper macro | |
111 | * to detect if the sum of two integers will overflow. | |
112 | * | |
113 | * Requires: a >= 0, typeof(a) equals typeof(b) | |
114 | */ | |
115 | #define signed_add_overflows(a, b) \ | |
116 | ((b) > maximum_signed_value_of_type(a) - (a)) | |
117 | ||
1368f650 JN |
118 | #define unsigned_add_overflows(a, b) \ |
119 | ((b) > maximum_unsigned_value_of_type(a) - (a)) | |
120 | ||
320d0b49 JK |
121 | /* |
122 | * Returns true if the multiplication of "a" and "b" will | |
123 | * overflow. The types of "a" and "b" must match and must be unsigned. | |
124 | * Note that this macro evaluates "a" twice! | |
125 | */ | |
126 | #define unsigned_mult_overflows(a, b) \ | |
127 | ((a) && (b) > maximum_unsigned_value_of_type(a) / (a)) | |
128 | ||
e2ffeae3 JS |
129 | /* |
130 | * Returns true if the left shift of "a" by "shift" bits will | |
131 | * overflow. The type of "a" must be unsigned. | |
132 | */ | |
133 | #define unsigned_left_shift_overflows(a, shift) \ | |
134 | ((shift) < bitsizeof(a) && \ | |
135 | (a) > maximum_unsigned_value_of_type(a) >> (shift)) | |
136 | ||
8723f216 NP |
137 | #ifdef __GNUC__ |
138 | #define TYPEOF(x) (__typeof__(x)) | |
139 | #else | |
140 | #define TYPEOF(x) | |
141 | #endif | |
142 | ||
f630cfda | 143 | #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits)))) |
db7244bd | 144 | #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ |
8723f216 | 145 | |
98cb6f30 PH |
146 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
147 | ||
cf606e3d AW |
148 | /* Approximation of the length of the decimal representation of this type. */ |
149 | #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) | |
150 | ||
9e12400d CMAB |
151 | #ifdef __MINGW64__ |
152 | #define _POSIX_C_SOURCE 1 | |
153 | #elif defined(__sun__) | |
4cb18a49 BC |
154 | /* |
155 | * On Solaris, when _XOPEN_EXTENDED is set, its header file | |
156 | * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE | |
157 | * setting to say we are XPG5 or XPG6. Also on Solaris, | |
158 | * XPG6 programs must be compiled with a c99 compiler, while | |
159 | * non XPG6 programs must be compiled with a pre-c99 compiler. | |
160 | */ | |
161 | # if __STDC_VERSION__ - 0 >= 199901L | |
162 | # define _XOPEN_SOURCE 600 | |
163 | # else | |
164 | # define _XOPEN_SOURCE 500 | |
165 | # endif | |
6555b196 | 166 | #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ |
6c109904 | 167 | !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ |
3a0a3a89 RJ |
168 | !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ |
169 | !defined(__CYGWIN__) | |
85023577 JH |
170 | #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ |
171 | #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ | |
c902c9a6 | 172 | #endif |
fb952206 JR |
173 | #define _ALL_SOURCE 1 |
174 | #define _GNU_SOURCE 1 | |
175 | #define _BSD_SOURCE 1 | |
f978a99f | 176 | #define _DEFAULT_SOURCE 1 |
9a695fbf | 177 | #define _NETBSD_SOURCE 1 |
9398b859 | 178 | #define _SGI_SOURCE 1 |
85023577 | 179 | |
380395d0 | 180 | #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ |
3571e78a | 181 | # if !defined(_WIN32_WINNT) |
2939a1f7 | 182 | # define _WIN32_WINNT 0x0600 |
41f29991 | 183 | # endif |
435bdf8c MSO |
184 | #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ |
185 | #include <winsock2.h> | |
bb390b1f CMAB |
186 | #ifndef NO_UNIX_SOCKETS |
187 | #include <afunix.h> | |
188 | #endif | |
435bdf8c | 189 | #include <windows.h> |
380395d0 | 190 | #define GIT_WINDOWS_NATIVE |
05cd988d | 191 | #ifdef HAVE_RTLGENRANDOM |
192 | /* This is required to get access to RtlGenRandom. */ | |
193 | #define SystemFunction036 NTAPI SystemFunction036 | |
194 | #include <NTSecAPI.h> | |
195 | #undef SystemFunction036 | |
196 | #endif | |
435bdf8c MSO |
197 | #endif |
198 | ||
4050c0df JH |
199 | #include <unistd.h> |
200 | #include <stdio.h> | |
201 | #include <sys/stat.h> | |
202 | #include <fcntl.h> | |
203 | #include <stddef.h> | |
204 | #include <stdlib.h> | |
205 | #include <stdarg.h> | |
206 | #include <string.h> | |
b3e103da | 207 | #ifdef HAVE_STRINGS_H |
6c109904 JS |
208 | #include <strings.h> /* for strcasecmp() */ |
209 | #endif | |
4050c0df JH |
210 | #include <errno.h> |
211 | #include <limits.h> | |
b2d05e06 | 212 | #ifdef NEEDS_SYS_PARAM_H |
4050c0df | 213 | #include <sys/param.h> |
6ede7205 | 214 | #endif |
4050c0df JH |
215 | #include <sys/types.h> |
216 | #include <dirent.h> | |
85023577 JH |
217 | #include <sys/time.h> |
218 | #include <time.h> | |
219 | #include <signal.h> | |
f4626df5 JS |
220 | #include <assert.h> |
221 | #include <regex.h> | |
222 | #include <utime.h> | |
088d8802 | 223 | #include <syslog.h> |
2648ccc2 ĐTCD |
224 | #if !defined(NO_POLL_H) |
225 | #include <poll.h> | |
226 | #elif !defined(NO_SYS_POLL_H) | |
fdc12114 | 227 | #include <sys/poll.h> |
2844923d | 228 | #else |
2648ccc2 | 229 | /* Pull the compat stuff */ |
2844923d MD |
230 | #include <poll.h> |
231 | #endif | |
9529080d KM |
232 | #ifdef HAVE_BSD_SYSCTL |
233 | #include <sys/sysctl.h> | |
234 | #endif | |
2f0aaaf9 | 235 | |
496f2569 | 236 | #if defined(__CYGWIN__) |
1cadad6f | 237 | #include "compat/win32/path-utils.h" |
496f2569 | 238 | #endif |
cfc755d3 VR |
239 | #if defined(__MINGW32__) |
240 | /* pull in Windows compatibility stuff */ | |
1cadad6f | 241 | #include "compat/win32/path-utils.h" |
cfc755d3 VR |
242 | #include "compat/mingw.h" |
243 | #elif defined(_MSC_VER) | |
22c3634c | 244 | #include "compat/win32/path-utils.h" |
cfc755d3 VR |
245 | #include "compat/msvc.h" |
246 | #else | |
1e8fef60 | 247 | #include <sys/utsname.h> |
f4626df5 | 248 | #include <sys/wait.h> |
ebae9ff9 | 249 | #include <sys/resource.h> |
85023577 | 250 | #include <sys/socket.h> |
80bbe72b | 251 | #include <sys/ioctl.h> |
eb80042c | 252 | #include <termios.h> |
2600973f | 253 | #ifndef NO_SYS_SELECT_H |
80bbe72b | 254 | #include <sys/select.h> |
2600973f | 255 | #endif |
85023577 JH |
256 | #include <netinet/in.h> |
257 | #include <netinet/tcp.h> | |
258 | #include <arpa/inet.h> | |
259 | #include <netdb.h> | |
260 | #include <pwd.h> | |
e2770979 | 261 | #include <sys/un.h> |
2844923d | 262 | #ifndef NO_INTTYPES_H |
007e2ba6 | 263 | #include <inttypes.h> |
2844923d MD |
264 | #else |
265 | #include <stdint.h> | |
266 | #endif | |
05cd988d | 267 | #ifdef HAVE_ARC4RANDOM_LIBBSD |
268 | #include <bsd/stdlib.h> | |
269 | #endif | |
270 | #ifdef HAVE_GETRANDOM | |
271 | #include <sys/random.h> | |
272 | #endif | |
6c109904 JS |
273 | #ifdef NO_INTPTR_T |
274 | /* | |
c70e1b04 | 275 | * On I16LP32, ILP32 and LP64 "long" is the safe bet, however |
6c109904 JS |
276 | * on LLP86, IL33LLP64 and P64 it needs to be "long long", |
277 | * while on IP16 and IP16L32 it is "int" (resp. "short") | |
278 | * Size needs to match (or exceed) 'sizeof(void *)'. | |
279 | * We can't take "long long" here as not everybody has it. | |
280 | */ | |
281 | typedef long intptr_t; | |
282 | typedef unsigned long uintptr_t; | |
283 | #endif | |
fb952206 | 284 | #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ |
85023577 | 285 | #include <grp.h> |
fb952206 | 286 | #define _ALL_SOURCE 1 |
41b20017 | 287 | #endif |
85023577 | 288 | |
76759c7d TB |
289 | /* used on Mac OS X */ |
290 | #ifdef PRECOMPOSE_UNICODE | |
291 | #include "compat/precompose_utf8.h" | |
292 | #else | |
5c327502 | 293 | static inline const char *precompose_argv_prefix(int argc, const char **argv, const char *prefix) |
15b52a44 | 294 | { |
5c327502 | 295 | return prefix; |
15b52a44 | 296 | } |
5020774a TB |
297 | static inline const char *precompose_string_if_needed(const char *in) |
298 | { | |
299 | return in; | |
300 | } | |
301 | ||
fdf72966 | 302 | #define probe_utf8_pathname_composition() |
76759c7d TB |
303 | #endif |
304 | ||
0539ecfd JS |
305 | #ifdef MKDIR_WO_TRAILING_SLASH |
306 | #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) | |
55454427 | 307 | int compat_mkdir_wo_trailing_slash(const char*, mode_t); |
0539ecfd JS |
308 | #endif |
309 | ||
7f9e848c JS |
310 | #ifdef NO_STRUCT_ITIMERVAL |
311 | struct itimerval { | |
312 | struct timeval it_interval; | |
313 | struct timeval it_value; | |
981ff520 | 314 | }; |
7f9e848c JS |
315 | #endif |
316 | ||
317 | #ifdef NO_SETITIMER | |
15b52a44 | 318 | static inline int setitimer(int which, const struct itimerval *value, struct itimerval *newvalue) { |
14639a47 | 319 | return 0; /* pretend success */ |
15b52a44 | 320 | } |
7f9e848c JS |
321 | #endif |
322 | ||
e1c06886 DA |
323 | #ifndef NO_LIBGEN_H |
324 | #include <libgen.h> | |
325 | #else | |
326 | #define basename gitbasename | |
55454427 | 327 | char *gitbasename(char *); |
824682ab | 328 | #define dirname gitdirname |
55454427 | 329 | char *gitdirname(char *); |
e1c06886 DA |
330 | #endif |
331 | ||
85023577 JH |
332 | #ifndef NO_ICONV |
333 | #include <iconv.h> | |
334 | #endif | |
4050c0df | 335 | |
684ec6c6 | 336 | #ifndef NO_OPENSSL |
88c03eb5 | 337 | #ifdef __APPLE__ |
b195aa00 | 338 | #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 |
88c03eb5 KM |
339 | #include <AvailabilityMacros.h> |
340 | #undef DEPRECATED_ATTRIBUTE | |
341 | #define DEPRECATED_ATTRIBUTE | |
342 | #undef __AVAILABILITY_MACROS_USES_AVAILABILITY | |
343 | #endif | |
684ec6c6 RS |
344 | #include <openssl/ssl.h> |
345 | #include <openssl/err.h> | |
346 | #endif | |
347 | ||
9806f5a7 NTND |
348 | #ifdef HAVE_SYSINFO |
349 | # include <sys/sysinfo.h> | |
350 | #endif | |
351 | ||
3b130ade DM |
352 | /* On most systems <netdb.h> would have given us this, but |
353 | * not on some systems (e.g. z/OS). | |
354 | */ | |
355 | #ifndef NI_MAXHOST | |
356 | #define NI_MAXHOST 1025 | |
357 | #endif | |
358 | ||
359 | #ifndef NI_MAXSERV | |
360 | #define NI_MAXSERV 32 | |
361 | #endif | |
362 | ||
d0c2449f JH |
363 | /* On most systems <limits.h> would have given us this, but |
364 | * not on some systems (e.g. GNU/Hurd). | |
365 | */ | |
366 | #ifndef PATH_MAX | |
367 | #define PATH_MAX 4096 | |
368 | #endif | |
369 | ||
28f4aee3 JS |
370 | typedef uintmax_t timestamp_t; |
371 | #define PRItime PRIuMAX | |
372 | #define parse_timestamp strtoumax | |
373 | #define TIME_MAX UINTMAX_MAX | |
2e09c012 | 374 | #define TIME_MIN 0 |
1aeb7e75 | 375 | |
80ba074f JS |
376 | #ifndef PATH_SEP |
377 | #define PATH_SEP ':' | |
378 | #endif | |
379 | ||
cb6a22c0 CW |
380 | #ifdef HAVE_PATHS_H |
381 | #include <paths.h> | |
382 | #endif | |
383 | #ifndef _PATH_DEFPATH | |
384 | #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" | |
385 | #endif | |
386 | ||
70fc5793 JS |
387 | #ifndef platform_core_config |
388 | static inline int noop_core_config(const char *var, const char *value, void *cb) | |
389 | { | |
390 | return 0; | |
391 | } | |
392 | #define platform_core_config noop_core_config | |
393 | #endif | |
394 | ||
684dd4c2 MT |
395 | int lstat_cache_aware_rmdir(const char *path); |
396 | #if !defined(__MINGW32__) && !defined(_MSC_VER) | |
397 | #define rmdir lstat_cache_aware_rmdir | |
398 | #endif | |
399 | ||
25fe217b | 400 | #ifndef has_dos_drive_prefix |
bf728346 RS |
401 | static inline int git_has_dos_drive_prefix(const char *path) |
402 | { | |
403 | return 0; | |
404 | } | |
405 | #define has_dos_drive_prefix git_has_dos_drive_prefix | |
25fe217b JS |
406 | #endif |
407 | ||
2f36eed9 JS |
408 | #ifndef skip_dos_drive_prefix |
409 | static inline int git_skip_dos_drive_prefix(char **path) | |
410 | { | |
411 | return 0; | |
412 | } | |
413 | #define skip_dos_drive_prefix git_skip_dos_drive_prefix | |
414 | #endif | |
415 | ||
bf728346 RS |
416 | #ifndef is_dir_sep |
417 | static inline int git_is_dir_sep(int c) | |
418 | { | |
419 | return c == '/'; | |
420 | } | |
421 | #define is_dir_sep git_is_dir_sep | |
c2369bdf CZ |
422 | #endif |
423 | ||
bf728346 RS |
424 | #ifndef offset_1st_component |
425 | static inline int git_offset_1st_component(const char *path) | |
426 | { | |
427 | return is_dir_sep(path[0]); | |
428 | } | |
429 | #define offset_1st_component git_offset_1st_component | |
25fe217b JS |
430 | #endif |
431 | ||
d2c84dad JS |
432 | #ifndef is_valid_path |
433 | #define is_valid_path(path) 1 | |
434 | #endif | |
435 | ||
d1c69255 | 436 | #ifndef find_last_dir_sep |
bf728346 RS |
437 | static inline char *git_find_last_dir_sep(const char *path) |
438 | { | |
439 | return strrchr(path, '/'); | |
440 | } | |
441 | #define find_last_dir_sep git_find_last_dir_sep | |
d1c69255 TN |
442 | #endif |
443 | ||
05ac8582 AK |
444 | #ifndef has_dir_sep |
445 | static inline int git_has_dir_sep(const char *path) | |
446 | { | |
447 | return !!strchr(path, '/'); | |
448 | } | |
449 | #define has_dir_sep(path) git_has_dir_sep(path) | |
450 | #endif | |
451 | ||
501afcb8 JS |
452 | #ifndef query_user_email |
453 | #define query_user_email() NULL | |
454 | #endif | |
455 | ||
1305ef37 RB |
456 | #ifdef __TANDEM |
457 | #include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)> | |
458 | #include <floss.h(floss_getpwuid)> | |
459 | #ifndef NSIG | |
460 | /* | |
461 | * NonStop NSE and NSX do not provide NSIG. SIGGUARDIAN(99) is the highest | |
462 | * known, by detective work using kill -l as a list is all signals | |
463 | * instead of signal.h where it should be. | |
464 | */ | |
465 | # define NSIG 100 | |
466 | #endif | |
467 | #endif | |
468 | ||
e4ac953b | 469 | #if defined(__HP_cc) && (__HP_cc >= 61000) |
b6ab349b MR |
470 | #define NORETURN __attribute__((noreturn)) |
471 | #define NORETURN_PTR | |
6520c846 | 472 | #elif defined(__GNUC__) && !defined(NO_NORETURN) |
4050c0df | 473 | #define NORETURN __attribute__((__noreturn__)) |
18660bc9 | 474 | #define NORETURN_PTR __attribute__((__noreturn__)) |
aba7dea8 RJ |
475 | #elif defined(_MSC_VER) |
476 | #define NORETURN __declspec(noreturn) | |
477 | #define NORETURN_PTR | |
4050c0df JH |
478 | #else |
479 | #define NORETURN | |
18660bc9 | 480 | #define NORETURN_PTR |
8cd7ebc8 | 481 | #ifndef __GNUC__ |
4050c0df JH |
482 | #ifndef __attribute__ |
483 | #define __attribute__(x) | |
484 | #endif | |
485 | #endif | |
8cd7ebc8 | 486 | #endif |
4050c0df | 487 | |
9fe3edc4 RJ |
488 | /* The sentinel attribute is valid from gcc version 4.0 */ |
489 | #if defined(__GNUC__) && (__GNUC__ >= 4) | |
490 | #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) | |
491 | #else | |
492 | #define LAST_ARG_MUST_BE_NULL | |
493 | #endif | |
494 | ||
bbd8eb3e CMAB |
495 | #define MAYBE_UNUSED __attribute__((__unused__)) |
496 | ||
51ea5519 NP |
497 | #include "compat/bswap.h" |
498 | ||
cebcab18 | 499 | #include "wildmatch.h" |
cebcab18 | 500 | |
9ccc0c08 RS |
501 | struct strbuf; |
502 | ||
4050c0df | 503 | /* General helper functions */ |
55454427 DL |
504 | void vreportf(const char *prefix, const char *err, va_list params); |
505 | NORETURN void usage(const char *err); | |
b199d714 DL |
506 | NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); |
507 | NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
508 | NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
509 | int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
510 | int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
511 | void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
512 | void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
4050c0df | 513 | |
f2be034c BG |
514 | #ifndef NO_OPENSSL |
515 | #ifdef APPLE_COMMON_CRYPTO | |
516 | #include "compat/apple-common-crypto.h" | |
517 | #else | |
518 | #include <openssl/evp.h> | |
519 | #include <openssl/hmac.h> | |
520 | #endif /* APPLE_COMMON_CRYPTO */ | |
521 | #include <openssl/x509v3.h> | |
522 | #endif /* NO_OPENSSL */ | |
523 | ||
e208f9cc JK |
524 | /* |
525 | * Let callers be aware of the constant return value; this can help | |
9798f7e5 MK |
526 | * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, |
527 | * because some compilers may not support variadic macros. Since we're only | |
528 | * trying to help gcc, anyway, it's OK; other compilers will fall back to | |
529 | * using the function as usual. | |
e208f9cc | 530 | */ |
ff0a80af | 531 | #if defined(__GNUC__) |
87fe5df3 JK |
532 | static inline int const_error(void) |
533 | { | |
534 | return -1; | |
535 | } | |
536 | #define error(...) (error(__VA_ARGS__), const_error()) | |
4df5e918 | 537 | #define error_errno(...) (error_errno(__VA_ARGS__), const_error()) |
e208f9cc JK |
538 | #endif |
539 | ||
5710dcce JK |
540 | typedef void (*report_fn)(const char *, va_list params); |
541 | ||
542 | void set_die_routine(NORETURN_PTR report_fn routine); | |
543 | void set_error_routine(report_fn routine); | |
544 | report_fn get_error_routine(void); | |
545 | void set_warn_routine(report_fn routine); | |
546 | report_fn get_warn_routine(void); | |
55454427 | 547 | void set_die_is_recursing_routine(int (*routine)(void)); |
39a3f5ea | 548 | |
55454427 DL |
549 | int starts_with(const char *str, const char *prefix); |
550 | int istarts_with(const char *str, const char *prefix); | |
698a68be | 551 | |
cf4fff57 JK |
552 | /* |
553 | * If the string "str" begins with the string found in "prefix", return 1. | |
554 | * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in | |
555 | * the string right after the prefix). | |
556 | * | |
557 | * Otherwise, return 0 and leave "out" untouched. | |
558 | * | |
559 | * Examples: | |
560 | * | |
561 | * [extract branch name, fail if not a branch] | |
562 | * if (!skip_prefix(ref, "refs/heads/", &branch) | |
563 | * return -1; | |
564 | * | |
565 | * [skip prefix if present, otherwise use whole string] | |
566 | * skip_prefix(name, "refs/heads/", &name); | |
567 | */ | |
568 | static inline int skip_prefix(const char *str, const char *prefix, | |
569 | const char **out) | |
fbca5837 | 570 | { |
ba399c46 | 571 | do { |
cf4fff57 JK |
572 | if (!*prefix) { |
573 | *out = str; | |
574 | return 1; | |
575 | } | |
ba399c46 | 576 | } while (*str++ == *prefix++); |
cf4fff57 | 577 | return 0; |
fbca5837 MV |
578 | } |
579 | ||
afaef55e CC |
580 | /* |
581 | * If the string "str" is the same as the string in "prefix", then the "arg" | |
582 | * parameter is set to the "def" parameter and 1 is returned. | |
583 | * If the string "str" begins with the string found in "prefix" and then a | |
584 | * "=" sign, then the "arg" parameter is set to "str + strlen(prefix) + 1" | |
585 | * (i.e., to the point in the string right after the prefix and the "=" sign), | |
586 | * and 1 is returned. | |
587 | * | |
588 | * Otherwise, return 0 and leave "arg" untouched. | |
589 | * | |
590 | * When we accept both a "--key" and a "--key=<val>" option, this function | |
591 | * can be used instead of !strcmp(arg, "--key") and then | |
592 | * skip_prefix(arg, "--key=", &arg) to parse such an option. | |
593 | */ | |
594 | int skip_to_optional_arg_default(const char *str, const char *prefix, | |
595 | const char **arg, const char *def); | |
596 | ||
597 | static inline int skip_to_optional_arg(const char *str, const char *prefix, | |
598 | const char **arg) | |
599 | { | |
600 | return skip_to_optional_arg_default(str, prefix, arg, ""); | |
601 | } | |
602 | ||
ae989a61 JK |
603 | /* |
604 | * Like skip_prefix, but promises never to read past "len" bytes of the input | |
605 | * buffer, and returns the remaining number of bytes in "out" via "outlen". | |
606 | */ | |
607 | static inline int skip_prefix_mem(const char *buf, size_t len, | |
608 | const char *prefix, | |
609 | const char **out, size_t *outlen) | |
610 | { | |
611 | size_t prefix_len = strlen(prefix); | |
612 | if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) { | |
613 | *out = buf + prefix_len; | |
614 | *outlen = len - prefix_len; | |
615 | return 1; | |
616 | } | |
617 | return 0; | |
618 | } | |
619 | ||
35480f0b JK |
620 | /* |
621 | * If buf ends with suffix, return 1 and subtract the length of the suffix | |
622 | * from *len. Otherwise, return 0 and leave *len untouched. | |
623 | */ | |
624 | static inline int strip_suffix_mem(const char *buf, size_t *len, | |
625 | const char *suffix) | |
626 | { | |
627 | size_t suflen = strlen(suffix); | |
628 | if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) | |
629 | return 0; | |
630 | *len -= suflen; | |
631 | return 1; | |
632 | } | |
633 | ||
634 | /* | |
635 | * If str ends with suffix, return 1 and set *len to the size of the string | |
636 | * without the suffix. Otherwise, return 0 and set *len to the size of the | |
637 | * string. | |
638 | * | |
639 | * Note that we do _not_ NUL-terminate str to the new length. | |
640 | */ | |
641 | static inline int strip_suffix(const char *str, const char *suffix, size_t *len) | |
642 | { | |
643 | *len = strlen(str); | |
644 | return strip_suffix_mem(str, len, suffix); | |
645 | } | |
646 | ||
f52a35fd JK |
647 | static inline int ends_with(const char *str, const char *suffix) |
648 | { | |
649 | size_t len; | |
650 | return strip_suffix(str, suffix, &len); | |
651 | } | |
652 | ||
568edcb9 RS |
653 | #define SWAP(a, b) do { \ |
654 | void *_swap_a_ptr = &(a); \ | |
655 | void *_swap_b_ptr = &(b); \ | |
656 | unsigned char _swap_buffer[sizeof(a)]; \ | |
657 | memcpy(_swap_buffer, _swap_a_ptr, sizeof(a)); \ | |
658 | memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) + \ | |
659 | BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b))); \ | |
660 | memcpy(_swap_b_ptr, _swap_buffer, sizeof(a)); \ | |
661 | } while (0) | |
662 | ||
b130a72b | 663 | #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) |
4050c0df JH |
664 | |
665 | #ifndef PROT_READ | |
666 | #define PROT_READ 1 | |
667 | #define PROT_WRITE 2 | |
668 | #define MAP_PRIVATE 1 | |
4050c0df JH |
669 | #endif |
670 | ||
d6779124 SP |
671 | #define mmap git_mmap |
672 | #define munmap git_munmap | |
55454427 DL |
673 | void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
674 | int git_munmap(void *start, size_t length); | |
4050c0df | 675 | |
b130a72b JL |
676 | #else /* NO_MMAP || USE_WIN32_MMAP */ |
677 | ||
678 | #include <sys/mman.h> | |
679 | ||
680 | #endif /* NO_MMAP || USE_WIN32_MMAP */ | |
681 | ||
682 | #ifdef NO_MMAP | |
683 | ||
5faaf246 | 684 | /* This value must be multiple of (pagesize * 2) */ |
8c82534d SP |
685 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) |
686 | ||
4050c0df JH |
687 | #else /* NO_MMAP */ |
688 | ||
5faaf246 | 689 | /* This value must be multiple of (pagesize * 2) */ |
22bac0ea SP |
690 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ |
691 | (sizeof(void*) >= 8 \ | |
692 | ? 1 * 1024 * 1024 * 1024 \ | |
693 | : 32 * 1024 * 1024) | |
4050c0df JH |
694 | |
695 | #endif /* NO_MMAP */ | |
696 | ||
fcf3a21a GV |
697 | #ifndef MAP_FAILED |
698 | #define MAP_FAILED ((void *)-1) | |
699 | #endif | |
700 | ||
fdb2a2a6 JH |
701 | #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT |
702 | #define on_disk_bytes(st) ((st).st_size) | |
703 | #else | |
704 | #define on_disk_bytes(st) ((st).st_blocks * 512) | |
705 | #endif | |
706 | ||
d543d9c0 DM |
707 | #ifdef NEEDS_MODE_TRANSLATION |
708 | #undef S_IFMT | |
709 | #undef S_IFREG | |
710 | #undef S_IFDIR | |
711 | #undef S_IFLNK | |
712 | #undef S_IFBLK | |
713 | #undef S_IFCHR | |
714 | #undef S_IFIFO | |
715 | #undef S_IFSOCK | |
716 | #define S_IFMT 0170000 | |
717 | #define S_IFREG 0100000 | |
718 | #define S_IFDIR 0040000 | |
719 | #define S_IFLNK 0120000 | |
720 | #define S_IFBLK 0060000 | |
721 | #define S_IFCHR 0020000 | |
722 | #define S_IFIFO 0010000 | |
723 | #define S_IFSOCK 0140000 | |
724 | #ifdef stat | |
725 | #undef stat | |
726 | #endif | |
727 | #define stat(path, buf) git_stat(path, buf) | |
55454427 | 728 | int git_stat(const char *, struct stat *); |
d543d9c0 DM |
729 | #ifdef fstat |
730 | #undef fstat | |
731 | #endif | |
732 | #define fstat(fd, buf) git_fstat(fd, buf) | |
55454427 | 733 | int git_fstat(int, struct stat *); |
d543d9c0 DM |
734 | #ifdef lstat |
735 | #undef lstat | |
736 | #endif | |
737 | #define lstat(path, buf) git_lstat(path, buf) | |
55454427 | 738 | int git_lstat(const char *, struct stat *); |
d543d9c0 DM |
739 | #endif |
740 | ||
22bac0ea | 741 | #define DEFAULT_PACKED_GIT_LIMIT \ |
be4ca290 | 742 | ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? (32 * 1024L * 1024L) : 256)) |
8c82534d | 743 | |
6900679c SH |
744 | #ifdef NO_PREAD |
745 | #define pread git_pread | |
55454427 | 746 | ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); |
6900679c | 747 | #endif |
14086b0a SP |
748 | /* |
749 | * Forward decl that will remind us if its twin in cache.h changes. | |
750 | * This function is used in compat/pread.c. But we can't include | |
751 | * cache.h there. | |
752 | */ | |
55454427 | 753 | ssize_t read_in_full(int fd, void *buf, size_t count); |
6900679c | 754 | |
4050c0df JH |
755 | #ifdef NO_SETENV |
756 | #define setenv gitsetenv | |
55454427 | 757 | int gitsetenv(const char *, const char *, int); |
4050c0df JH |
758 | #endif |
759 | ||
ca5bb5d5 SP |
760 | #ifdef NO_MKDTEMP |
761 | #define mkdtemp gitmkdtemp | |
55454427 | 762 | char *gitmkdtemp(char *); |
ca5bb5d5 | 763 | #endif |
0620b39b | 764 | |
731043fd JR |
765 | #ifdef NO_UNSETENV |
766 | #define unsetenv gitunsetenv | |
a38989bd | 767 | int gitunsetenv(const char *); |
731043fd JR |
768 | #endif |
769 | ||
4050c0df JH |
770 | #ifdef NO_STRCASESTR |
771 | #define strcasestr gitstrcasestr | |
55454427 | 772 | char *gitstrcasestr(const char *haystack, const char *needle); |
4050c0df JH |
773 | #endif |
774 | ||
817151e6 PE |
775 | #ifdef NO_STRLCPY |
776 | #define strlcpy gitstrlcpy | |
55454427 | 777 | size_t gitstrlcpy(char *, const char *, size_t); |
817151e6 PE |
778 | #endif |
779 | ||
bc6b4f52 JR |
780 | #ifdef NO_STRTOUMAX |
781 | #define strtoumax gitstrtoumax | |
55454427 | 782 | uintmax_t gitstrtoumax(const char *, char **, int); |
97000ba6 | 783 | #define strtoimax gitstrtoimax |
55454427 | 784 | intmax_t gitstrtoimax(const char *, char **, int); |
bc6b4f52 JR |
785 | #endif |
786 | ||
fa0c87c3 AR |
787 | #ifdef NO_HSTRERROR |
788 | #define hstrerror githstrerror | |
55454427 | 789 | const char *githstrerror(int herror); |
fa0c87c3 AR |
790 | #endif |
791 | ||
b21b9f1d RS |
792 | #ifdef NO_MEMMEM |
793 | #define memmem gitmemmem | |
794 | void *gitmemmem(const void *haystack, size_t haystacklen, | |
ec36c42a | 795 | const void *needle, size_t needlelen); |
b21b9f1d RS |
796 | #endif |
797 | ||
ca2baa3f RS |
798 | #ifdef OVERRIDE_STRDUP |
799 | #ifdef strdup | |
800 | #undef strdup | |
801 | #endif | |
802 | #define strdup gitstrdup | |
803 | char *gitstrdup(const char *s); | |
804 | #endif | |
b21b9f1d | 805 | |
40036bed MK |
806 | #ifdef NO_GETPAGESIZE |
807 | #define getpagesize() sysconf(_SC_PAGESIZE) | |
808 | #endif | |
809 | ||
05d1ed61 BW |
810 | #ifndef O_CLOEXEC |
811 | #define O_CLOEXEC 0 | |
812 | #endif | |
813 | ||
cba22528 | 814 | #ifdef FREAD_READS_DIRECTORIES |
b0a642ac RJ |
815 | # if !defined(SUPPRESS_FOPEN_REDEFINITION) |
816 | # ifdef fopen | |
817 | # undef fopen | |
818 | # endif | |
819 | # define fopen(a,b) git_fopen(a,b) | |
820 | # endif | |
55454427 | 821 | FILE *git_fopen(const char*, const char*); |
cba22528 BC |
822 | #endif |
823 | ||
c4582f93 | 824 | #ifdef SNPRINTF_RETURNS_BOGUS |
ab03803c BS |
825 | #ifdef snprintf |
826 | #undef snprintf | |
827 | #endif | |
c4582f93 | 828 | #define snprintf git_snprintf |
b199d714 | 829 | int git_snprintf(char *str, size_t maxsize, |
ad6dad09 | 830 | const char *format, ...); |
ab03803c BS |
831 | #ifdef vsnprintf |
832 | #undef vsnprintf | |
833 | #endif | |
c4582f93 | 834 | #define vsnprintf git_vsnprintf |
55454427 | 835 | int git_vsnprintf(char *str, size_t maxsize, |
ad6dad09 | 836 | const char *format, va_list ap); |
c4582f93 MR |
837 | #endif |
838 | ||
2b081012 JK |
839 | #ifdef OPEN_RETURNS_EINTR |
840 | #undef open | |
841 | #define open git_open_with_retry | |
842 | int git_open_with_retry(const char *path, int flag, ...); | |
843 | #endif | |
844 | ||
726c8ef5 JS |
845 | #ifdef __GLIBC_PREREQ |
846 | #if __GLIBC_PREREQ(2, 1) | |
847 | #define HAVE_STRCHRNUL | |
848 | #endif | |
849 | #endif | |
850 | ||
851 | #ifndef HAVE_STRCHRNUL | |
659c69cf | 852 | #define strchrnul gitstrchrnul |
9e79f00f AE |
853 | static inline char *gitstrchrnul(const char *s, int c) |
854 | { | |
855 | while (*s && *s != c) | |
856 | s++; | |
857 | return (char *)s; | |
858 | } | |
659c69cf RS |
859 | #endif |
860 | ||
da523cc5 MP |
861 | #ifdef NO_INET_PTON |
862 | int inet_pton(int af, const char *src, void *dst); | |
863 | #endif | |
864 | ||
865 | #ifdef NO_INET_NTOP | |
866 | const char *inet_ntop(int af, const void *src, char *dst, size_t size); | |
867 | #endif | |
868 | ||
0f4b6db3 EB |
869 | #ifdef NO_PTHREADS |
870 | #define atexit git_atexit | |
55454427 | 871 | int git_atexit(void (*handler)(void)); |
0f4b6db3 EB |
872 | #endif |
873 | ||
320d0b49 JK |
874 | static inline size_t st_add(size_t a, size_t b) |
875 | { | |
876 | if (unsigned_add_overflows(a, b)) | |
877 | die("size_t overflow: %"PRIuMAX" + %"PRIuMAX, | |
878 | (uintmax_t)a, (uintmax_t)b); | |
879 | return a + b; | |
880 | } | |
d616fbf2 ES |
881 | #define st_add3(a,b,c) st_add(st_add((a),(b)),(c)) |
882 | #define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d)) | |
320d0b49 JK |
883 | |
884 | static inline size_t st_mult(size_t a, size_t b) | |
885 | { | |
886 | if (unsigned_mult_overflows(a, b)) | |
887 | die("size_t overflow: %"PRIuMAX" * %"PRIuMAX, | |
888 | (uintmax_t)a, (uintmax_t)b); | |
889 | return a * b; | |
890 | } | |
891 | ||
892 | static inline size_t st_sub(size_t a, size_t b) | |
893 | { | |
894 | if (a < b) | |
895 | die("size_t underflow: %"PRIuMAX" - %"PRIuMAX, | |
896 | (uintmax_t)a, (uintmax_t)b); | |
897 | return a - b; | |
898 | } | |
a9a74636 | 899 | |
e2ffeae3 JS |
900 | static inline size_t st_left_shift(size_t a, unsigned shift) |
901 | { | |
902 | if (unsigned_left_shift_overflows(a, shift)) | |
903 | die("size_t overflow: %"PRIuMAX" << %u", | |
904 | (uintmax_t)a, shift); | |
905 | return a << shift; | |
906 | } | |
907 | ||
908 | static inline unsigned long cast_size_t_to_ulong(size_t a) | |
909 | { | |
910 | if (a != (unsigned long)a) | |
911 | die("object too large to read on this platform: %" | |
912 | PRIuMAX" is cut off to %lu", | |
913 | (uintmax_t)a, (unsigned long)a); | |
914 | return (unsigned long)a; | |
915 | } | |
916 | ||
61f76a36 KS |
917 | #ifdef HAVE_ALLOCA_H |
918 | # include <alloca.h> | |
919 | # define xalloca(size) (alloca(size)) | |
920 | # define xalloca_free(p) do {} while (0) | |
921 | #else | |
922 | # define xalloca(size) (xmalloc(size)) | |
923 | # define xalloca_free(p) (free(p)) | |
924 | #endif | |
55454427 DL |
925 | char *xstrdup(const char *str); |
926 | void *xmalloc(size_t size); | |
927 | void *xmallocz(size_t size); | |
928 | void *xmallocz_gently(size_t size); | |
929 | void *xmemdupz(const void *data, size_t len); | |
930 | char *xstrndup(const char *str, size_t len); | |
931 | void *xrealloc(void *ptr, size_t size); | |
932 | void *xcalloc(size_t nmemb, size_t size); | |
3540c71e | 933 | void xsetenv(const char *name, const char *value, int overwrite); |
55454427 | 934 | void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
dc059294 | 935 | const char *mmap_os_err(void); |
55454427 | 936 | void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
b199d714 | 937 | int xopen(const char *path, int flags, ...); |
55454427 DL |
938 | ssize_t xread(int fd, void *buf, size_t len); |
939 | ssize_t xwrite(int fd, const void *buf, size_t len); | |
940 | ssize_t xpread(int fd, void *buf, size_t len, off_t offset); | |
941 | int xdup(int fd); | |
942 | FILE *xfopen(const char *path, const char *mode); | |
943 | FILE *xfdopen(int fd, const char *mode); | |
944 | int xmkstemp(char *temp_filename); | |
945 | int xmkstemp_mode(char *temp_filename, int mode); | |
946 | char *xgetcwd(void); | |
947 | FILE *fopen_for_writing(const char *path); | |
948 | FILE *fopen_or_warn(const char *path, const char *mode); | |
f21a47b2 | 949 | |
14570dc6 | 950 | /* |
951 | * Like strncmp, but only return zero if s is NUL-terminated and exactly len | |
952 | * characters long. If it is not, consider it greater than t. | |
953 | */ | |
954 | int xstrncmpz(const char *s, const char *t, size_t len); | |
955 | ||
481df65f ÆAB |
956 | /* |
957 | * FREE_AND_NULL(ptr) is like free(ptr) followed by ptr = NULL. Note | |
958 | * that ptr is used twice, so don't pass e.g. ptr++. | |
959 | */ | |
960 | #define FREE_AND_NULL(p) do { free(p); (p) = NULL; } while (0) | |
961 | ||
e7792a74 | 962 | #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) |
f1121499 | 963 | #define CALLOC_ARRAY(x, alloc) (x) = xcalloc((alloc), sizeof(*(x))) |
e7792a74 | 964 | #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) |
3ac22f82 | 965 | |
60566cbb RS |
966 | #define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \ |
967 | BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) | |
968 | static inline void copy_array(void *dst, const void *src, size_t n, size_t size) | |
969 | { | |
970 | if (n) | |
971 | memcpy(dst, src, st_mult(size, n)); | |
972 | } | |
973 | ||
57839807 RS |
974 | #define MOVE_ARRAY(dst, src, n) move_array((dst), (src), (n), sizeof(*(dst)) + \ |
975 | BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) | |
976 | static inline void move_array(void *dst, const void *src, size_t n, size_t size) | |
977 | { | |
978 | if (n) | |
979 | memmove(dst, src, st_mult(size, n)); | |
980 | } | |
981 | ||
36895391 JK |
982 | /* |
983 | * These functions help you allocate structs with flex arrays, and copy | |
984 | * the data directly into the array. For example, if you had: | |
985 | * | |
986 | * struct foo { | |
987 | * int bar; | |
988 | * char name[FLEX_ARRAY]; | |
989 | * }; | |
990 | * | |
991 | * you can do: | |
992 | * | |
993 | * struct foo *f; | |
994 | * FLEX_ALLOC_MEM(f, name, src, len); | |
995 | * | |
996 | * to allocate a "foo" with the contents of "src" in the "name" field. | |
997 | * The resulting struct is automatically zero'd, and the flex-array field | |
998 | * is NUL-terminated (whether the incoming src buffer was or not). | |
999 | * | |
1000 | * The FLEXPTR_* variants operate on structs that don't use flex-arrays, | |
1001 | * but do want to store a pointer to some extra data in the same allocated | |
1002 | * block. For example, if you have: | |
1003 | * | |
1004 | * struct foo { | |
1005 | * char *name; | |
1006 | * int bar; | |
1007 | * }; | |
1008 | * | |
1009 | * you can do: | |
1010 | * | |
1011 | * struct foo *f; | |
0bb1519f | 1012 | * FLEXPTR_ALLOC_STR(f, name, src); |
36895391 JK |
1013 | * |
1014 | * and "name" will point to a block of memory after the struct, which will be | |
1015 | * freed along with the struct (but the pointer can be repointed anywhere). | |
1016 | * | |
1017 | * The *_STR variants accept a string parameter rather than a ptr/len | |
1018 | * combination. | |
1019 | * | |
1020 | * Note that these macros will evaluate the first parameter multiple | |
1021 | * times, and it must be assignable as an lvalue. | |
1022 | */ | |
1023 | #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ | |
e9451782 RS |
1024 | size_t flex_array_len_ = (len); \ |
1025 | (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ | |
1026 | memcpy((void *)(x)->flexname, (buf), flex_array_len_); \ | |
36895391 JK |
1027 | } while (0) |
1028 | #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ | |
0ac52a38 RS |
1029 | size_t flex_array_len_ = (len); \ |
1030 | (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ | |
1031 | memcpy((x) + 1, (buf), flex_array_len_); \ | |
36895391 JK |
1032 | (x)->ptrname = (void *)((x)+1); \ |
1033 | } while(0) | |
1034 | #define FLEX_ALLOC_STR(x, flexname, str) \ | |
1035 | FLEX_ALLOC_MEM((x), flexname, (str), strlen(str)) | |
1036 | #define FLEXPTR_ALLOC_STR(x, ptrname, str) \ | |
1037 | FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) | |
1038 | ||
d64ea0f8 JK |
1039 | static inline char *xstrdup_or_null(const char *str) |
1040 | { | |
1041 | return str ? xstrdup(str) : NULL; | |
1042 | } | |
1043 | ||
dc49cd76 SP |
1044 | static inline size_t xsize_t(off_t len) |
1045 | { | |
aafa5df0 | 1046 | if (len < 0 || (uintmax_t) len > SIZE_MAX) |
46be82df | 1047 | die("Cannot handle files this big"); |
aafa5df0 | 1048 | return (size_t) len; |
dc49cd76 SP |
1049 | } |
1050 | ||
7b03c89e | 1051 | __attribute__((format (printf, 3, 4))) |
b199d714 | 1052 | int xsnprintf(char *dst, size_t max, const char *fmt, ...); |
7b03c89e | 1053 | |
da25bdb7 RS |
1054 | #ifndef HOST_NAME_MAX |
1055 | #define HOST_NAME_MAX 256 | |
1056 | #endif | |
1057 | ||
55454427 | 1058 | int xgethostname(char *buf, size_t len); |
5781a9a2 | 1059 | |
f1589d10 | 1060 | /* in ctype.c, for kwset users */ |
189c860c | 1061 | extern const unsigned char tolower_trans_tbl[256]; |
f1589d10 | 1062 | |
4050c0df | 1063 | /* Sane ctype - no locale, and works with signed chars */ |
c2e9364a | 1064 | #undef isascii |
4050c0df JH |
1065 | #undef isspace |
1066 | #undef isdigit | |
1067 | #undef isalpha | |
1068 | #undef isalnum | |
0fcec2ce | 1069 | #undef isprint |
43ccdf56 NK |
1070 | #undef islower |
1071 | #undef isupper | |
4050c0df JH |
1072 | #undef tolower |
1073 | #undef toupper | |
1c149ab2 NTND |
1074 | #undef iscntrl |
1075 | #undef ispunct | |
1076 | #undef isxdigit | |
2adf7247 | 1077 | |
ca5ab7d1 | 1078 | extern const unsigned char sane_ctype[256]; |
4050c0df JH |
1079 | #define GIT_SPACE 0x01 |
1080 | #define GIT_DIGIT 0x02 | |
1081 | #define GIT_ALPHA 0x04 | |
8cc32992 | 1082 | #define GIT_GLOB_SPECIAL 0x08 |
f9b7cce6 | 1083 | #define GIT_REGEX_SPECIAL 0x10 |
2f6c9760 | 1084 | #define GIT_PATHSPEC_MAGIC 0x20 |
1c149ab2 NTND |
1085 | #define GIT_CNTRL 0x40 |
1086 | #define GIT_PUNCT 0x80 | |
4050c0df | 1087 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) |
c2e9364a | 1088 | #define isascii(x) (((x) & ~0x7f) == 0) |
4050c0df JH |
1089 | #define isspace(x) sane_istest(x,GIT_SPACE) |
1090 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
1091 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
1092 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
0fcec2ce | 1093 | #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) |
43ccdf56 NK |
1094 | #define islower(x) sane_iscase(x, 1) |
1095 | #define isupper(x) sane_iscase(x, 0) | |
8cc32992 | 1096 | #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) |
f9b7cce6 | 1097 | #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) |
1c149ab2 NTND |
1098 | #define iscntrl(x) (sane_istest(x,GIT_CNTRL)) |
1099 | #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ | |
1100 | GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) | |
50a71776 | 1101 | #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) |
4050c0df JH |
1102 | #define tolower(x) sane_case((unsigned char)(x), 0x20) |
1103 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
2f6c9760 | 1104 | #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) |
4050c0df JH |
1105 | |
1106 | static inline int sane_case(int x, int high) | |
1107 | { | |
1108 | if (sane_istest(x, GIT_ALPHA)) | |
1109 | x = (x & ~0x20) | high; | |
1110 | return x; | |
1111 | } | |
1112 | ||
43ccdf56 NK |
1113 | static inline int sane_iscase(int x, int is_lower) |
1114 | { | |
1115 | if (!sane_istest(x, GIT_ALPHA)) | |
1116 | return 0; | |
1117 | ||
1118 | if (is_lower) | |
1119 | return (x & 0x20) != 0; | |
1120 | else | |
1121 | return (x & 0x20) == 0; | |
1122 | } | |
1123 | ||
41a80924 JK |
1124 | /* |
1125 | * Like skip_prefix, but compare case-insensitively. Note that the comparison | |
1126 | * is done via tolower(), so it is strictly ASCII (no multi-byte characters or | |
1127 | * locale-specific conversions). | |
1128 | */ | |
1129 | static inline int skip_iprefix(const char *str, const char *prefix, | |
1130 | const char **out) | |
1131 | { | |
1132 | do { | |
1133 | if (!*prefix) { | |
1134 | *out = str; | |
1135 | return 1; | |
1136 | } | |
1137 | } while (tolower(*str++) == tolower(*prefix++)); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
6aead43d JM |
1141 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) |
1142 | { | |
1143 | unsigned long ul; | |
1144 | char *p; | |
1145 | ||
1146 | errno = 0; | |
e6f2599c MM |
1147 | /* negative values would be accepted by strtoul */ |
1148 | if (strchr(s, '-')) | |
1149 | return -1; | |
6aead43d JM |
1150 | ul = strtoul(s, &p, base); |
1151 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
1152 | return -1; | |
1153 | *result = ul; | |
1154 | return 0; | |
1155 | } | |
1156 | ||
7791ecbc JH |
1157 | static inline int strtol_i(char const *s, int base, int *result) |
1158 | { | |
1159 | long ul; | |
1160 | char *p; | |
1161 | ||
1162 | errno = 0; | |
1163 | ul = strtol(s, &p, base); | |
1164 | if (errno || *p || p == s || (int) ul != ul) | |
1165 | return -1; | |
1166 | *result = ul; | |
1167 | return 0; | |
1168 | } | |
1169 | ||
97fff610 JS |
1170 | void git_stable_qsort(void *base, size_t nmemb, size_t size, |
1171 | int(*compar)(const void *, const void *)); | |
43fe901b | 1172 | #ifdef INTERNAL_QSORT |
97fff610 | 1173 | #define qsort git_stable_qsort |
43fe901b BD |
1174 | #endif |
1175 | ||
dbc540c7 RS |
1176 | #define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar) |
1177 | static inline void sane_qsort(void *base, size_t nmemb, size_t size, | |
1178 | int(*compar)(const void *, const void *)) | |
1179 | { | |
1180 | if (nmemb > 1) | |
1181 | qsort(base, nmemb, size, compar); | |
1182 | } | |
1183 | ||
97fff610 JS |
1184 | #define STABLE_QSORT(base, n, compar) \ |
1185 | git_stable_qsort((base), (n), sizeof(*(base)), compar) | |
1186 | ||
04ee8b87 RS |
1187 | #ifndef HAVE_ISO_QSORT_S |
1188 | int git_qsort_s(void *base, size_t nmemb, size_t size, | |
1189 | int (*compar)(const void *, const void *, void *), void *ctx); | |
1190 | #define qsort_s git_qsort_s | |
1191 | #endif | |
1192 | ||
3ca86994 RS |
1193 | #define QSORT_S(base, n, compar, ctx) do { \ |
1194 | if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \ | |
c3c3486b | 1195 | BUG("qsort_s() failed"); \ |
3ca86994 RS |
1196 | } while (0) |
1197 | ||
2f895225 JS |
1198 | #ifndef REG_STARTEND |
1199 | #error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd" | |
1200 | #endif | |
1201 | ||
1202 | static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size, | |
1203 | size_t nmatch, regmatch_t pmatch[], int eflags) | |
1204 | { | |
1205 | assert(nmatch > 0 && pmatch); | |
1206 | pmatch[0].rm_so = 0; | |
1207 | pmatch[0].rm_eo = size; | |
1208 | return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND); | |
1209 | } | |
1210 | ||
81a24b52 AR |
1211 | #ifndef DIR_HAS_BSD_GROUP_SEMANTICS |
1212 | # define FORCE_DIR_SET_GID S_ISGID | |
1213 | #else | |
1214 | # define FORCE_DIR_SET_GID 0 | |
1215 | #endif | |
1216 | ||
c06ff490 KB |
1217 | #ifdef NO_NSEC |
1218 | #undef USE_NSEC | |
1219 | #define ST_CTIME_NSEC(st) 0 | |
1220 | #define ST_MTIME_NSEC(st) 0 | |
1221 | #else | |
c567383b BG |
1222 | #ifdef USE_ST_TIMESPEC |
1223 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) | |
1224 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) | |
1225 | #else | |
c06ff490 KB |
1226 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) |
1227 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) | |
1228 | #endif | |
c567383b | 1229 | #endif |
c06ff490 | 1230 | |
34779c53 JS |
1231 | #ifdef UNRELIABLE_FSTAT |
1232 | #define fstat_is_reliable() 0 | |
1233 | #else | |
1234 | #define fstat_is_reliable() 1 | |
1235 | #endif | |
1236 | ||
ab8632ae | 1237 | #ifndef va_copy |
26db0f2e JN |
1238 | /* |
1239 | * Since an obvious implementation of va_list would be to make it a | |
1240 | * pointer into the stack frame, a simple assignment will work on | |
1241 | * many systems. But let's try to be more portable. | |
1242 | */ | |
1243 | #ifdef __va_copy | |
1244 | #define va_copy(dst, src) __va_copy(dst, src) | |
1245 | #else | |
1246 | #define va_copy(dst, src) ((dst) = (src)) | |
1247 | #endif | |
ab8632ae JK |
1248 | #endif |
1249 | ||
765dc168 JK |
1250 | /* |
1251 | * This is always defined as a first step towards making the use of variadic | |
1252 | * macros unconditional. If it causes compilation problems on your platform, | |
1253 | * please report it to the Git mailing list at git@vger.kernel.org. | |
1254 | */ | |
e05bed96 | 1255 | #define HAVE_VARIADIC_MACROS 1 |
e05bed96 | 1256 | |
746ea4ad RJ |
1257 | /* usage.c: only to be used for testing BUG() implementation (see test-tool) */ |
1258 | extern int BUG_exit_code; | |
1259 | ||
d8193743 JK |
1260 | #ifdef HAVE_VARIADIC_MACROS |
1261 | __attribute__((format (printf, 3, 4))) NORETURN | |
1262 | void BUG_fl(const char *file, int line, const char *fmt, ...); | |
1263 | #define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__) | |
1264 | #else | |
1265 | __attribute__((format (printf, 1, 2))) NORETURN | |
1266 | void BUG(const char *fmt, ...); | |
1267 | #endif | |
1268 | ||
fc71db39 AR |
1269 | /* |
1270 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
1054af7d RS |
1271 | * Returns 0 on success, which includes trying to unlink an object that does |
1272 | * not exist. | |
fc71db39 AR |
1273 | */ |
1274 | int unlink_or_warn(const char *path); | |
9ccc0c08 RS |
1275 | /* |
1276 | * Tries to unlink file. Returns 0 if unlink succeeded | |
1277 | * or the file already didn't exist. Returns -1 and | |
1278 | * appends a message to err suitable for | |
1279 | * 'error("%s", err->buf)' on error. | |
1280 | */ | |
1281 | int unlink_or_msg(const char *file, struct strbuf *err); | |
d1723296 | 1282 | /* |
1054af7d RS |
1283 | * Preserves errno, prints a message, but gives no warning for ENOENT. |
1284 | * Returns 0 on success, which includes trying to remove a directory that does | |
1285 | * not exist. | |
d1723296 PC |
1286 | */ |
1287 | int rmdir_or_warn(const char *path); | |
80d706af PC |
1288 | /* |
1289 | * Calls the correct function out of {unlink,rmdir}_or_warn based on | |
1290 | * the supplied file mode. | |
1291 | */ | |
1292 | int remove_or_warn(unsigned int mode, const char *path); | |
fc71db39 | 1293 | |
e5c52c98 JN |
1294 | /* |
1295 | * Call access(2), but warn for any error except "missing file" | |
1296 | * (ENOENT or ENOTDIR). | |
1297 | */ | |
4698c8fe JN |
1298 | #define ACCESS_EACCES_OK (1U << 0) |
1299 | int access_or_warn(const char *path, int mode, unsigned flag); | |
1300 | int access_or_die(const char *path, int mode, unsigned flag); | |
ba8bd830 | 1301 | |
11dc1fcb NTND |
1302 | /* Warn on an inaccessible file if errno indicates this is an error */ |
1303 | int warn_on_fopen_errors(const char *path); | |
55b38a48 | 1304 | |
00611d84 JK |
1305 | /* |
1306 | * Open with O_NOFOLLOW, or equivalent. Note that the fallback equivalent | |
1307 | * may be racy. Do not use this as protection against an attacker who can | |
1308 | * simultaneously create paths. | |
1309 | */ | |
1310 | int open_nofollow(const char *path, int flags); | |
1311 | ||
1b56cdf9 KM |
1312 | #ifndef SHELL_PATH |
1313 | # define SHELL_PATH "/bin/sh" | |
1314 | #endif | |
1315 | ||
f43cce23 | 1316 | #ifndef _POSIX_THREAD_SAFE_FUNCTIONS |
15b52a44 JH |
1317 | static inline void flockfile(FILE *fh) |
1318 | { | |
1319 | ; /* nothing */ | |
1320 | } | |
1321 | static inline void funlockfile(FILE *fh) | |
1322 | { | |
1323 | ; /* nothing */ | |
1324 | } | |
f43cce23 JK |
1325 | #define getc_unlocked(fh) getc(fh) |
1326 | #endif | |
1327 | ||
18a4f6be NTND |
1328 | #ifdef FILENO_IS_A_MACRO |
1329 | int git_fileno(FILE *stream); | |
400caafb | 1330 | # ifndef COMPAT_CODE_FILENO |
18a4f6be NTND |
1331 | # undef fileno |
1332 | # define fileno(p) git_fileno(p) | |
1333 | # endif | |
1334 | #endif | |
1335 | ||
400caafb CC |
1336 | #ifdef NEED_ACCESS_ROOT_HANDLER |
1337 | int git_access(const char *path, int mode); | |
1338 | # ifndef COMPAT_CODE_ACCESS | |
1339 | # ifdef access | |
1340 | # undef access | |
1341 | # endif | |
1342 | # define access(path, mode) git_access(path, mode) | |
1343 | # endif | |
1344 | #endif | |
1345 | ||
dc5a18b3 JH |
1346 | /* |
1347 | * Our code often opens a path to an optional file, to work on its | |
1348 | * contents when we can successfully open it. We can ignore a failure | |
1349 | * to open if such an optional file does not exist, but we do want to | |
1350 | * report a failure in opening for other reasons (e.g. we got an I/O | |
1351 | * error, or the file is there, but we lack the permission to open). | |
1352 | * | |
1353 | * Call this function after seeing an error from open() or fopen() to | |
1354 | * see if the errno indicates a missing file that we can safely ignore. | |
1355 | */ | |
1356 | static inline int is_missing_file_error(int errno_) | |
1357 | { | |
1358 | return (errno_ == ENOENT || errno_ == ENOTDIR); | |
1359 | } | |
1360 | ||
55454427 | 1361 | int cmd_main(int, const char **); |
5c238e29 | 1362 | |
ee4512ed JH |
1363 | /* |
1364 | * Intercept all calls to exit() and route them to trace2 to | |
1365 | * optionally emit a message before calling the real exit(). | |
1366 | */ | |
1367 | int trace2_cmd_exit_fl(const char *file, int line, int code); | |
1368 | #define exit(code) exit(trace2_cmd_exit_fl(__FILE__, __LINE__, (code))) | |
1369 | ||
0e5bba53 JK |
1370 | /* |
1371 | * You can mark a stack variable with UNLEAK(var) to avoid it being | |
1372 | * reported as a leak by tools like LSAN or valgrind. The argument | |
1373 | * should generally be the variable itself (not its address and not what | |
1374 | * it points to). It's safe to use this on pointers which may already | |
1375 | * have been freed, or on pointers which may still be in use. | |
1376 | * | |
1377 | * Use this _only_ for a variable that leaks by going out of scope at | |
1378 | * program exit (so only from cmd_* functions or their direct helpers). | |
1379 | * Normal functions, especially those which may be called multiple | |
1380 | * times, should actually free their memory. This is only meant as | |
1381 | * an annotation, and does nothing in non-leak-checking builds. | |
1382 | */ | |
1383 | #ifdef SUPPRESS_ANNOTATED_LEAKS | |
55454427 | 1384 | void unleak_memory(const void *ptr, size_t len); |
5de3de32 | 1385 | #define UNLEAK(var) unleak_memory(&(var), sizeof(var)) |
0e5bba53 | 1386 | #else |
5de3de32 | 1387 | #define UNLEAK(var) do {} while (0) |
0e5bba53 JK |
1388 | #endif |
1389 | ||
c8af66ab JK |
1390 | /* |
1391 | * This include must come after system headers, since it introduces macros that | |
1392 | * replace system names. | |
1393 | */ | |
1394 | #include "banned.h" | |
1395 | ||
973d5eea EW |
1396 | /* |
1397 | * container_of - Get the address of an object containing a field. | |
1398 | * | |
1399 | * @ptr: pointer to the field. | |
1400 | * @type: type of the object. | |
1401 | * @member: name of the field within the object. | |
1402 | */ | |
1403 | #define container_of(ptr, type, member) \ | |
1404 | ((type *) ((char *)(ptr) - offsetof(type, member))) | |
1405 | ||
f0e63c41 EW |
1406 | /* |
1407 | * helper function for `container_of_or_null' to avoid multiple | |
1408 | * evaluation of @ptr | |
1409 | */ | |
1410 | static inline void *container_of_or_null_offset(void *ptr, size_t offset) | |
1411 | { | |
1412 | return ptr ? (char *)ptr - offset : NULL; | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * like `container_of', but allows returned value to be NULL | |
1417 | */ | |
1418 | #define container_of_or_null(ptr, type, member) \ | |
1419 | (type *)container_of_or_null_offset(ptr, offsetof(type, member)) | |
1420 | ||
23dee69f | 1421 | /* |
abcb66c6 | 1422 | * like offsetof(), but takes a pointer to a variable of type which |
23dee69f EW |
1423 | * contains @member, instead of a specified type. |
1424 | * @ptr is subject to multiple evaluation since we can't rely on __typeof__ | |
1425 | * everywhere. | |
1426 | */ | |
1427 | #if defined(__GNUC__) /* clang sets this, too */ | |
1428 | #define OFFSETOF_VAR(ptr, member) offsetof(__typeof__(*ptr), member) | |
1429 | #else /* !__GNUC__ */ | |
1430 | #define OFFSETOF_VAR(ptr, member) \ | |
1431 | ((uintptr_t)&(ptr)->member - (uintptr_t)(ptr)) | |
1432 | #endif /* !__GNUC__ */ | |
1433 | ||
a76b138d HWN |
1434 | void sleep_millisec(int millisec); |
1435 | ||
05cd988d | 1436 | /* |
1437 | * Generate len bytes from the system cryptographically secure PRNG. | |
1438 | * Returns 0 on success and -1 on error, setting errno. The inability to | |
1439 | * satisfy the full request is an error. | |
1440 | */ | |
1441 | int csprng_bytes(void *buf, size_t len); | |
1442 | ||
5c238e29 | 1443 | #endif |