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4050c0df JH |
1 | #ifndef GIT_COMPAT_UTIL_H |
2 | #define GIT_COMPAT_UTIL_H | |
3 | ||
b97e9116 MW |
4 | #define _FILE_OFFSET_BITS 64 |
5 | ||
89c855ed EP |
6 | |
7 | /* Derived from Linux "Features Test Macro" header | |
8 | * Convenience macros to test the versions of gcc (or | |
9 | * a compatible compiler). | |
10 | * Use them like this: | |
11 | * #if GIT_GNUC_PREREQ (2,8) | |
12 | * ... code requiring gcc 2.8 or later ... | |
13 | * #endif | |
14 | */ | |
15 | #if defined(__GNUC__) && defined(__GNUC_MINOR__) | |
16 | # define GIT_GNUC_PREREQ(maj, min) \ | |
17 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | |
18 | #else | |
19 | #define GIT_GNUC_PREREQ(maj, min) 0 | |
20 | #endif | |
21 | ||
22 | ||
8f1d2e6f | 23 | #ifndef FLEX_ARRAY |
8e973991 JH |
24 | /* |
25 | * See if our compiler is known to support flexible array members. | |
26 | */ | |
203ee91f | 27 | #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580)) |
8e973991 JH |
28 | # define FLEX_ARRAY /* empty */ |
29 | #elif defined(__GNUC__) | |
30 | # if (__GNUC__ >= 3) | |
31 | # define FLEX_ARRAY /* empty */ | |
32 | # else | |
33 | # define FLEX_ARRAY 0 /* older GNU extension */ | |
34 | # endif | |
35 | #endif | |
36 | ||
37 | /* | |
38 | * Otherwise, default to safer but a bit wasteful traditional style | |
39 | */ | |
40 | #ifndef FLEX_ARRAY | |
41 | # define FLEX_ARRAY 1 | |
8f1d2e6f JH |
42 | #endif |
43 | #endif | |
44 | ||
89c855ed EP |
45 | |
46 | /* | |
47 | * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression. | |
48 | * @cond: the compile-time condition which must be true. | |
49 | * | |
50 | * Your compile will fail if the condition isn't true, or can't be evaluated | |
51 | * by the compiler. This can be used in an expression: its value is "0". | |
52 | * | |
53 | * Example: | |
54 | * #define foo_to_char(foo) \ | |
55 | * ((char *)(foo) \ | |
56 | * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0)) | |
57 | */ | |
58 | #define BUILD_ASSERT_OR_ZERO(cond) \ | |
59 | (sizeof(char [1 - 2*!(cond)]) - 1) | |
60 | ||
e2c6f7cd | 61 | #if GIT_GNUC_PREREQ(3, 1) |
89c855ed EP |
62 | /* &arr[0] degrades to a pointer: a different type from an array */ |
63 | # define BARF_UNLESS_AN_ARRAY(arr) \ | |
64 | BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \ | |
65 | __typeof__(&(arr)[0]))) | |
e2c6f7cd CB |
66 | #else |
67 | # define BARF_UNLESS_AN_ARRAY(arr) 0 | |
89c855ed EP |
68 | #endif |
69 | /* | |
70 | * ARRAY_SIZE - get the number of elements in a visible array | |
71 | * <at> x: the array whose size you want. | |
72 | * | |
73 | * This does not work on pointers, or arrays declared as [], or | |
74 | * function parameters. With correct compiler support, such usage | |
75 | * will cause a build error (see the build_assert_or_zero macro). | |
76 | */ | |
77 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x)) | |
78 | ||
f630cfda | 79 | #define bitsizeof(x) (CHAR_BIT * sizeof(x)) |
b4f2a6ac | 80 | |
c03c8315 EFL |
81 | #define maximum_signed_value_of_type(a) \ |
82 | (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a))) | |
83 | ||
1368f650 JN |
84 | #define maximum_unsigned_value_of_type(a) \ |
85 | (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a))) | |
86 | ||
c03c8315 EFL |
87 | /* |
88 | * Signed integer overflow is undefined in C, so here's a helper macro | |
89 | * to detect if the sum of two integers will overflow. | |
90 | * | |
91 | * Requires: a >= 0, typeof(a) equals typeof(b) | |
92 | */ | |
93 | #define signed_add_overflows(a, b) \ | |
94 | ((b) > maximum_signed_value_of_type(a) - (a)) | |
95 | ||
1368f650 JN |
96 | #define unsigned_add_overflows(a, b) \ |
97 | ((b) > maximum_unsigned_value_of_type(a) - (a)) | |
98 | ||
320d0b49 JK |
99 | /* |
100 | * Returns true if the multiplication of "a" and "b" will | |
101 | * overflow. The types of "a" and "b" must match and must be unsigned. | |
102 | * Note that this macro evaluates "a" twice! | |
103 | */ | |
104 | #define unsigned_mult_overflows(a, b) \ | |
105 | ((a) && (b) > maximum_unsigned_value_of_type(a) / (a)) | |
106 | ||
8723f216 NP |
107 | #ifdef __GNUC__ |
108 | #define TYPEOF(x) (__typeof__(x)) | |
109 | #else | |
110 | #define TYPEOF(x) | |
111 | #endif | |
112 | ||
f630cfda | 113 | #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits)))) |
db7244bd | 114 | #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ |
8723f216 | 115 | |
98cb6f30 PH |
116 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
117 | ||
cf606e3d AW |
118 | /* Approximation of the length of the decimal representation of this type. */ |
119 | #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) | |
120 | ||
4cb18a49 BC |
121 | #if defined(__sun__) |
122 | /* | |
123 | * On Solaris, when _XOPEN_EXTENDED is set, its header file | |
124 | * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE | |
125 | * setting to say we are XPG5 or XPG6. Also on Solaris, | |
126 | * XPG6 programs must be compiled with a c99 compiler, while | |
127 | * non XPG6 programs must be compiled with a pre-c99 compiler. | |
128 | */ | |
129 | # if __STDC_VERSION__ - 0 >= 199901L | |
130 | # define _XOPEN_SOURCE 600 | |
131 | # else | |
132 | # define _XOPEN_SOURCE 500 | |
133 | # endif | |
6555b196 | 134 | #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ |
6c109904 | 135 | !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ |
3a0a3a89 RJ |
136 | !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ |
137 | !defined(__CYGWIN__) | |
85023577 JH |
138 | #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ |
139 | #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ | |
c902c9a6 | 140 | #endif |
fb952206 JR |
141 | #define _ALL_SOURCE 1 |
142 | #define _GNU_SOURCE 1 | |
143 | #define _BSD_SOURCE 1 | |
f978a99f | 144 | #define _DEFAULT_SOURCE 1 |
9a695fbf | 145 | #define _NETBSD_SOURCE 1 |
9398b859 | 146 | #define _SGI_SOURCE 1 |
85023577 | 147 | |
380395d0 | 148 | #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ |
8453c125 | 149 | # if defined (_MSC_VER) && !defined(_WIN32_WINNT) |
41f29991 RJ |
150 | # define _WIN32_WINNT 0x0502 |
151 | # endif | |
435bdf8c MSO |
152 | #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ |
153 | #include <winsock2.h> | |
154 | #include <windows.h> | |
380395d0 | 155 | #define GIT_WINDOWS_NATIVE |
435bdf8c MSO |
156 | #endif |
157 | ||
4050c0df JH |
158 | #include <unistd.h> |
159 | #include <stdio.h> | |
160 | #include <sys/stat.h> | |
161 | #include <fcntl.h> | |
162 | #include <stddef.h> | |
163 | #include <stdlib.h> | |
164 | #include <stdarg.h> | |
165 | #include <string.h> | |
b3e103da | 166 | #ifdef HAVE_STRINGS_H |
6c109904 JS |
167 | #include <strings.h> /* for strcasecmp() */ |
168 | #endif | |
4050c0df JH |
169 | #include <errno.h> |
170 | #include <limits.h> | |
b2d05e06 | 171 | #ifdef NEEDS_SYS_PARAM_H |
4050c0df | 172 | #include <sys/param.h> |
6ede7205 | 173 | #endif |
4050c0df JH |
174 | #include <sys/types.h> |
175 | #include <dirent.h> | |
85023577 JH |
176 | #include <sys/time.h> |
177 | #include <time.h> | |
178 | #include <signal.h> | |
f4626df5 JS |
179 | #include <assert.h> |
180 | #include <regex.h> | |
181 | #include <utime.h> | |
088d8802 | 182 | #include <syslog.h> |
2844923d | 183 | #ifndef NO_SYS_POLL_H |
fdc12114 | 184 | #include <sys/poll.h> |
2844923d MD |
185 | #else |
186 | #include <poll.h> | |
187 | #endif | |
9529080d KM |
188 | #ifdef HAVE_BSD_SYSCTL |
189 | #include <sys/sysctl.h> | |
190 | #endif | |
2f0aaaf9 | 191 | |
cfc755d3 VR |
192 | #if defined(__MINGW32__) |
193 | /* pull in Windows compatibility stuff */ | |
194 | #include "compat/mingw.h" | |
195 | #elif defined(_MSC_VER) | |
196 | #include "compat/msvc.h" | |
197 | #else | |
1e8fef60 | 198 | #include <sys/utsname.h> |
f4626df5 | 199 | #include <sys/wait.h> |
ebae9ff9 | 200 | #include <sys/resource.h> |
85023577 | 201 | #include <sys/socket.h> |
80bbe72b | 202 | #include <sys/ioctl.h> |
eb80042c | 203 | #include <termios.h> |
2600973f | 204 | #ifndef NO_SYS_SELECT_H |
80bbe72b | 205 | #include <sys/select.h> |
2600973f | 206 | #endif |
85023577 JH |
207 | #include <netinet/in.h> |
208 | #include <netinet/tcp.h> | |
209 | #include <arpa/inet.h> | |
210 | #include <netdb.h> | |
211 | #include <pwd.h> | |
e2770979 | 212 | #include <sys/un.h> |
2844923d | 213 | #ifndef NO_INTTYPES_H |
007e2ba6 | 214 | #include <inttypes.h> |
2844923d MD |
215 | #else |
216 | #include <stdint.h> | |
217 | #endif | |
6c109904 JS |
218 | #ifdef NO_INTPTR_T |
219 | /* | |
220 | * On I16LP32, ILP32 and LP64 "long" is the save bet, however | |
221 | * on LLP86, IL33LLP64 and P64 it needs to be "long long", | |
222 | * while on IP16 and IP16L32 it is "int" (resp. "short") | |
223 | * Size needs to match (or exceed) 'sizeof(void *)'. | |
224 | * We can't take "long long" here as not everybody has it. | |
225 | */ | |
226 | typedef long intptr_t; | |
227 | typedef unsigned long uintptr_t; | |
228 | #endif | |
fb952206 | 229 | #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ |
85023577 | 230 | #include <grp.h> |
fb952206 | 231 | #define _ALL_SOURCE 1 |
41b20017 | 232 | #endif |
85023577 | 233 | |
76759c7d TB |
234 | /* used on Mac OS X */ |
235 | #ifdef PRECOMPOSE_UNICODE | |
236 | #include "compat/precompose_utf8.h" | |
237 | #else | |
238 | #define precompose_str(in,i_nfd2nfc) | |
239 | #define precompose_argv(c,v) | |
fdf72966 | 240 | #define probe_utf8_pathname_composition() |
76759c7d TB |
241 | #endif |
242 | ||
0539ecfd JS |
243 | #ifdef MKDIR_WO_TRAILING_SLASH |
244 | #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) | |
245 | extern int compat_mkdir_wo_trailing_slash(const char*, mode_t); | |
246 | #endif | |
247 | ||
7f9e848c JS |
248 | #ifdef NO_STRUCT_ITIMERVAL |
249 | struct itimerval { | |
250 | struct timeval it_interval; | |
251 | struct timeval it_value; | |
981ff520 | 252 | }; |
7f9e848c JS |
253 | #endif |
254 | ||
255 | #ifdef NO_SETITIMER | |
256 | #define setitimer(which,value,ovalue) | |
257 | #endif | |
258 | ||
e1c06886 DA |
259 | #ifndef NO_LIBGEN_H |
260 | #include <libgen.h> | |
261 | #else | |
262 | #define basename gitbasename | |
263 | extern char *gitbasename(char *); | |
824682ab JS |
264 | #define dirname gitdirname |
265 | extern char *gitdirname(char *); | |
e1c06886 DA |
266 | #endif |
267 | ||
85023577 JH |
268 | #ifndef NO_ICONV |
269 | #include <iconv.h> | |
270 | #endif | |
4050c0df | 271 | |
684ec6c6 | 272 | #ifndef NO_OPENSSL |
88c03eb5 | 273 | #ifdef __APPLE__ |
b195aa00 | 274 | #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 |
88c03eb5 KM |
275 | #include <AvailabilityMacros.h> |
276 | #undef DEPRECATED_ATTRIBUTE | |
277 | #define DEPRECATED_ATTRIBUTE | |
278 | #undef __AVAILABILITY_MACROS_USES_AVAILABILITY | |
279 | #endif | |
684ec6c6 RS |
280 | #include <openssl/ssl.h> |
281 | #include <openssl/err.h> | |
282 | #endif | |
283 | ||
3b130ade DM |
284 | /* On most systems <netdb.h> would have given us this, but |
285 | * not on some systems (e.g. z/OS). | |
286 | */ | |
287 | #ifndef NI_MAXHOST | |
288 | #define NI_MAXHOST 1025 | |
289 | #endif | |
290 | ||
291 | #ifndef NI_MAXSERV | |
292 | #define NI_MAXSERV 32 | |
293 | #endif | |
294 | ||
d0c2449f JH |
295 | /* On most systems <limits.h> would have given us this, but |
296 | * not on some systems (e.g. GNU/Hurd). | |
297 | */ | |
298 | #ifndef PATH_MAX | |
299 | #define PATH_MAX 4096 | |
300 | #endif | |
301 | ||
c4001d92 SP |
302 | #ifndef PRIuMAX |
303 | #define PRIuMAX "llu" | |
304 | #endif | |
305 | ||
fdcdb778 WM |
306 | #ifndef SCNuMAX |
307 | #define SCNuMAX PRIuMAX | |
308 | #endif | |
309 | ||
607bb3ff JS |
310 | #ifndef PRIu32 |
311 | #define PRIu32 "u" | |
312 | #endif | |
313 | ||
314 | #ifndef PRIx32 | |
315 | #define PRIx32 "x" | |
316 | #endif | |
317 | ||
5418d96d RJ |
318 | #ifndef PRIo32 |
319 | #define PRIo32 "o" | |
320 | #endif | |
321 | ||
28f4aee3 JS |
322 | typedef uintmax_t timestamp_t; |
323 | #define PRItime PRIuMAX | |
324 | #define parse_timestamp strtoumax | |
325 | #define TIME_MAX UINTMAX_MAX | |
1aeb7e75 | 326 | |
80ba074f JS |
327 | #ifndef PATH_SEP |
328 | #define PATH_SEP ':' | |
329 | #endif | |
330 | ||
cb6a22c0 CW |
331 | #ifdef HAVE_PATHS_H |
332 | #include <paths.h> | |
333 | #endif | |
334 | #ifndef _PATH_DEFPATH | |
335 | #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" | |
336 | #endif | |
337 | ||
25fe217b | 338 | #ifndef has_dos_drive_prefix |
bf728346 RS |
339 | static inline int git_has_dos_drive_prefix(const char *path) |
340 | { | |
341 | return 0; | |
342 | } | |
343 | #define has_dos_drive_prefix git_has_dos_drive_prefix | |
25fe217b JS |
344 | #endif |
345 | ||
2f36eed9 JS |
346 | #ifndef skip_dos_drive_prefix |
347 | static inline int git_skip_dos_drive_prefix(char **path) | |
348 | { | |
349 | return 0; | |
350 | } | |
351 | #define skip_dos_drive_prefix git_skip_dos_drive_prefix | |
352 | #endif | |
353 | ||
bf728346 RS |
354 | #ifndef is_dir_sep |
355 | static inline int git_is_dir_sep(int c) | |
356 | { | |
357 | return c == '/'; | |
358 | } | |
359 | #define is_dir_sep git_is_dir_sep | |
c2369bdf CZ |
360 | #endif |
361 | ||
bf728346 RS |
362 | #ifndef offset_1st_component |
363 | static inline int git_offset_1st_component(const char *path) | |
364 | { | |
365 | return is_dir_sep(path[0]); | |
366 | } | |
367 | #define offset_1st_component git_offset_1st_component | |
25fe217b JS |
368 | #endif |
369 | ||
d1c69255 | 370 | #ifndef find_last_dir_sep |
bf728346 RS |
371 | static inline char *git_find_last_dir_sep(const char *path) |
372 | { | |
373 | return strrchr(path, '/'); | |
374 | } | |
375 | #define find_last_dir_sep git_find_last_dir_sep | |
d1c69255 TN |
376 | #endif |
377 | ||
e4ac953b | 378 | #if defined(__HP_cc) && (__HP_cc >= 61000) |
b6ab349b MR |
379 | #define NORETURN __attribute__((noreturn)) |
380 | #define NORETURN_PTR | |
6520c846 | 381 | #elif defined(__GNUC__) && !defined(NO_NORETURN) |
4050c0df | 382 | #define NORETURN __attribute__((__noreturn__)) |
18660bc9 | 383 | #define NORETURN_PTR __attribute__((__noreturn__)) |
aba7dea8 RJ |
384 | #elif defined(_MSC_VER) |
385 | #define NORETURN __declspec(noreturn) | |
386 | #define NORETURN_PTR | |
4050c0df JH |
387 | #else |
388 | #define NORETURN | |
18660bc9 | 389 | #define NORETURN_PTR |
8cd7ebc8 | 390 | #ifndef __GNUC__ |
4050c0df JH |
391 | #ifndef __attribute__ |
392 | #define __attribute__(x) | |
393 | #endif | |
394 | #endif | |
8cd7ebc8 | 395 | #endif |
4050c0df | 396 | |
9fe3edc4 RJ |
397 | /* The sentinel attribute is valid from gcc version 4.0 */ |
398 | #if defined(__GNUC__) && (__GNUC__ >= 4) | |
399 | #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) | |
400 | #else | |
401 | #define LAST_ARG_MUST_BE_NULL | |
402 | #endif | |
403 | ||
51ea5519 NP |
404 | #include "compat/bswap.h" |
405 | ||
cebcab18 | 406 | #include "wildmatch.h" |
cebcab18 | 407 | |
9ccc0c08 RS |
408 | struct strbuf; |
409 | ||
4050c0df | 410 | /* General helper functions */ |
ebaa79f4 | 411 | extern void vreportf(const char *prefix, const char *err, va_list params); |
a4f3131c | 412 | extern NORETURN void usage(const char *err); |
64b1cb74 | 413 | extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); |
a4f3131c EFL |
414 | extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); |
415 | extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
4050c0df | 416 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
fd1d6723 | 417 | extern int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
46efd2d9 | 418 | extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); |
fd1d6723 | 419 | extern void warning_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); |
4050c0df | 420 | |
f2be034c BG |
421 | #ifndef NO_OPENSSL |
422 | #ifdef APPLE_COMMON_CRYPTO | |
423 | #include "compat/apple-common-crypto.h" | |
424 | #else | |
425 | #include <openssl/evp.h> | |
426 | #include <openssl/hmac.h> | |
427 | #endif /* APPLE_COMMON_CRYPTO */ | |
428 | #include <openssl/x509v3.h> | |
429 | #endif /* NO_OPENSSL */ | |
430 | ||
e208f9cc JK |
431 | /* |
432 | * Let callers be aware of the constant return value; this can help | |
9798f7e5 MK |
433 | * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, |
434 | * because some compilers may not support variadic macros. Since we're only | |
435 | * trying to help gcc, anyway, it's OK; other compilers will fall back to | |
436 | * using the function as usual. | |
e208f9cc | 437 | */ |
ff0a80af | 438 | #if defined(__GNUC__) |
87fe5df3 JK |
439 | static inline int const_error(void) |
440 | { | |
441 | return -1; | |
442 | } | |
443 | #define error(...) (error(__VA_ARGS__), const_error()) | |
4df5e918 | 444 | #define error_errno(...) (error_errno(__VA_ARGS__), const_error()) |
e208f9cc JK |
445 | #endif |
446 | ||
18660bc9 | 447 | extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)); |
3bc4181f | 448 | extern void set_error_routine(void (*routine)(const char *err, va_list params)); |
725149be | 449 | extern void (*get_error_routine(void))(const char *err, va_list params); |
b83f108b | 450 | extern void set_warn_routine(void (*routine)(const char *warn, va_list params)); |
725149be | 451 | extern void (*get_warn_routine(void))(const char *warn, va_list params); |
c19a490e | 452 | extern void set_die_is_recursing_routine(int (*routine)(void)); |
39a3f5ea | 453 | |
95662315 | 454 | extern int starts_with(const char *str, const char *prefix); |
698a68be | 455 | |
cf4fff57 JK |
456 | /* |
457 | * If the string "str" begins with the string found in "prefix", return 1. | |
458 | * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in | |
459 | * the string right after the prefix). | |
460 | * | |
461 | * Otherwise, return 0 and leave "out" untouched. | |
462 | * | |
463 | * Examples: | |
464 | * | |
465 | * [extract branch name, fail if not a branch] | |
466 | * if (!skip_prefix(ref, "refs/heads/", &branch) | |
467 | * return -1; | |
468 | * | |
469 | * [skip prefix if present, otherwise use whole string] | |
470 | * skip_prefix(name, "refs/heads/", &name); | |
471 | */ | |
472 | static inline int skip_prefix(const char *str, const char *prefix, | |
473 | const char **out) | |
fbca5837 | 474 | { |
ba399c46 | 475 | do { |
cf4fff57 JK |
476 | if (!*prefix) { |
477 | *out = str; | |
478 | return 1; | |
479 | } | |
ba399c46 | 480 | } while (*str++ == *prefix++); |
cf4fff57 | 481 | return 0; |
fbca5837 MV |
482 | } |
483 | ||
ae989a61 JK |
484 | /* |
485 | * Like skip_prefix, but promises never to read past "len" bytes of the input | |
486 | * buffer, and returns the remaining number of bytes in "out" via "outlen". | |
487 | */ | |
488 | static inline int skip_prefix_mem(const char *buf, size_t len, | |
489 | const char *prefix, | |
490 | const char **out, size_t *outlen) | |
491 | { | |
492 | size_t prefix_len = strlen(prefix); | |
493 | if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) { | |
494 | *out = buf + prefix_len; | |
495 | *outlen = len - prefix_len; | |
496 | return 1; | |
497 | } | |
498 | return 0; | |
499 | } | |
500 | ||
35480f0b JK |
501 | /* |
502 | * If buf ends with suffix, return 1 and subtract the length of the suffix | |
503 | * from *len. Otherwise, return 0 and leave *len untouched. | |
504 | */ | |
505 | static inline int strip_suffix_mem(const char *buf, size_t *len, | |
506 | const char *suffix) | |
507 | { | |
508 | size_t suflen = strlen(suffix); | |
509 | if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) | |
510 | return 0; | |
511 | *len -= suflen; | |
512 | return 1; | |
513 | } | |
514 | ||
515 | /* | |
516 | * If str ends with suffix, return 1 and set *len to the size of the string | |
517 | * without the suffix. Otherwise, return 0 and set *len to the size of the | |
518 | * string. | |
519 | * | |
520 | * Note that we do _not_ NUL-terminate str to the new length. | |
521 | */ | |
522 | static inline int strip_suffix(const char *str, const char *suffix, size_t *len) | |
523 | { | |
524 | *len = strlen(str); | |
525 | return strip_suffix_mem(str, len, suffix); | |
526 | } | |
527 | ||
f52a35fd JK |
528 | static inline int ends_with(const char *str, const char *suffix) |
529 | { | |
530 | size_t len; | |
531 | return strip_suffix(str, suffix, &len); | |
532 | } | |
533 | ||
568edcb9 RS |
534 | #define SWAP(a, b) do { \ |
535 | void *_swap_a_ptr = &(a); \ | |
536 | void *_swap_b_ptr = &(b); \ | |
537 | unsigned char _swap_buffer[sizeof(a)]; \ | |
538 | memcpy(_swap_buffer, _swap_a_ptr, sizeof(a)); \ | |
539 | memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) + \ | |
540 | BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b))); \ | |
541 | memcpy(_swap_b_ptr, _swap_buffer, sizeof(a)); \ | |
542 | } while (0) | |
543 | ||
b130a72b | 544 | #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) |
4050c0df JH |
545 | |
546 | #ifndef PROT_READ | |
547 | #define PROT_READ 1 | |
548 | #define PROT_WRITE 2 | |
549 | #define MAP_PRIVATE 1 | |
4050c0df JH |
550 | #endif |
551 | ||
d6779124 SP |
552 | #define mmap git_mmap |
553 | #define munmap git_munmap | |
554 | extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
555 | extern int git_munmap(void *start, size_t length); | |
4050c0df | 556 | |
b130a72b JL |
557 | #else /* NO_MMAP || USE_WIN32_MMAP */ |
558 | ||
559 | #include <sys/mman.h> | |
560 | ||
561 | #endif /* NO_MMAP || USE_WIN32_MMAP */ | |
562 | ||
563 | #ifdef NO_MMAP | |
564 | ||
5faaf246 | 565 | /* This value must be multiple of (pagesize * 2) */ |
8c82534d SP |
566 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) |
567 | ||
4050c0df JH |
568 | #else /* NO_MMAP */ |
569 | ||
5faaf246 | 570 | /* This value must be multiple of (pagesize * 2) */ |
22bac0ea SP |
571 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ |
572 | (sizeof(void*) >= 8 \ | |
573 | ? 1 * 1024 * 1024 * 1024 \ | |
574 | : 32 * 1024 * 1024) | |
4050c0df JH |
575 | |
576 | #endif /* NO_MMAP */ | |
577 | ||
fcf3a21a GV |
578 | #ifndef MAP_FAILED |
579 | #define MAP_FAILED ((void *)-1) | |
580 | #endif | |
581 | ||
fdb2a2a6 JH |
582 | #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT |
583 | #define on_disk_bytes(st) ((st).st_size) | |
584 | #else | |
585 | #define on_disk_bytes(st) ((st).st_blocks * 512) | |
586 | #endif | |
587 | ||
d543d9c0 DM |
588 | #ifdef NEEDS_MODE_TRANSLATION |
589 | #undef S_IFMT | |
590 | #undef S_IFREG | |
591 | #undef S_IFDIR | |
592 | #undef S_IFLNK | |
593 | #undef S_IFBLK | |
594 | #undef S_IFCHR | |
595 | #undef S_IFIFO | |
596 | #undef S_IFSOCK | |
597 | #define S_IFMT 0170000 | |
598 | #define S_IFREG 0100000 | |
599 | #define S_IFDIR 0040000 | |
600 | #define S_IFLNK 0120000 | |
601 | #define S_IFBLK 0060000 | |
602 | #define S_IFCHR 0020000 | |
603 | #define S_IFIFO 0010000 | |
604 | #define S_IFSOCK 0140000 | |
605 | #ifdef stat | |
606 | #undef stat | |
607 | #endif | |
608 | #define stat(path, buf) git_stat(path, buf) | |
609 | extern int git_stat(const char *, struct stat *); | |
610 | #ifdef fstat | |
611 | #undef fstat | |
612 | #endif | |
613 | #define fstat(fd, buf) git_fstat(fd, buf) | |
614 | extern int git_fstat(int, struct stat *); | |
615 | #ifdef lstat | |
616 | #undef lstat | |
617 | #endif | |
618 | #define lstat(path, buf) git_lstat(path, buf) | |
619 | extern int git_lstat(const char *, struct stat *); | |
620 | #endif | |
621 | ||
22bac0ea | 622 | #define DEFAULT_PACKED_GIT_LIMIT \ |
be4ca290 | 623 | ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? (32 * 1024L * 1024L) : 256)) |
8c82534d | 624 | |
6900679c SH |
625 | #ifdef NO_PREAD |
626 | #define pread git_pread | |
627 | extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); | |
628 | #endif | |
14086b0a SP |
629 | /* |
630 | * Forward decl that will remind us if its twin in cache.h changes. | |
631 | * This function is used in compat/pread.c. But we can't include | |
632 | * cache.h there. | |
633 | */ | |
634 | extern ssize_t read_in_full(int fd, void *buf, size_t count); | |
6900679c | 635 | |
4050c0df JH |
636 | #ifdef NO_SETENV |
637 | #define setenv gitsetenv | |
638 | extern int gitsetenv(const char *, const char *, int); | |
639 | #endif | |
640 | ||
ca5bb5d5 SP |
641 | #ifdef NO_MKDTEMP |
642 | #define mkdtemp gitmkdtemp | |
643 | extern char *gitmkdtemp(char *); | |
644 | #endif | |
0620b39b | 645 | |
731043fd JR |
646 | #ifdef NO_UNSETENV |
647 | #define unsetenv gitunsetenv | |
648 | extern void gitunsetenv(const char *); | |
649 | #endif | |
650 | ||
4050c0df JH |
651 | #ifdef NO_STRCASESTR |
652 | #define strcasestr gitstrcasestr | |
653 | extern char *gitstrcasestr(const char *haystack, const char *needle); | |
654 | #endif | |
655 | ||
817151e6 PE |
656 | #ifdef NO_STRLCPY |
657 | #define strlcpy gitstrlcpy | |
658 | extern size_t gitstrlcpy(char *, const char *, size_t); | |
659 | #endif | |
660 | ||
bc6b4f52 JR |
661 | #ifdef NO_STRTOUMAX |
662 | #define strtoumax gitstrtoumax | |
663 | extern uintmax_t gitstrtoumax(const char *, char **, int); | |
97000ba6 JS |
664 | #define strtoimax gitstrtoimax |
665 | extern intmax_t gitstrtoimax(const char *, char **, int); | |
bc6b4f52 JR |
666 | #endif |
667 | ||
fa0c87c3 AR |
668 | #ifdef NO_HSTRERROR |
669 | #define hstrerror githstrerror | |
670 | extern const char *githstrerror(int herror); | |
671 | #endif | |
672 | ||
b21b9f1d RS |
673 | #ifdef NO_MEMMEM |
674 | #define memmem gitmemmem | |
675 | void *gitmemmem(const void *haystack, size_t haystacklen, | |
676 | const void *needle, size_t needlelen); | |
677 | #endif | |
678 | ||
ca2baa3f RS |
679 | #ifdef OVERRIDE_STRDUP |
680 | #ifdef strdup | |
681 | #undef strdup | |
682 | #endif | |
683 | #define strdup gitstrdup | |
684 | char *gitstrdup(const char *s); | |
685 | #endif | |
b21b9f1d | 686 | |
40036bed MK |
687 | #ifdef NO_GETPAGESIZE |
688 | #define getpagesize() sysconf(_SC_PAGESIZE) | |
689 | #endif | |
690 | ||
05d1ed61 BW |
691 | #ifndef O_CLOEXEC |
692 | #define O_CLOEXEC 0 | |
693 | #endif | |
694 | ||
cba22528 | 695 | #ifdef FREAD_READS_DIRECTORIES |
b0a642ac RJ |
696 | # if !defined(SUPPRESS_FOPEN_REDEFINITION) |
697 | # ifdef fopen | |
698 | # undef fopen | |
699 | # endif | |
700 | # define fopen(a,b) git_fopen(a,b) | |
701 | # endif | |
cba22528 BC |
702 | extern FILE *git_fopen(const char*, const char*); |
703 | #endif | |
704 | ||
c4582f93 | 705 | #ifdef SNPRINTF_RETURNS_BOGUS |
ab03803c BS |
706 | #ifdef snprintf |
707 | #undef snprintf | |
708 | #endif | |
c4582f93 MR |
709 | #define snprintf git_snprintf |
710 | extern int git_snprintf(char *str, size_t maxsize, | |
711 | const char *format, ...); | |
ab03803c BS |
712 | #ifdef vsnprintf |
713 | #undef vsnprintf | |
714 | #endif | |
c4582f93 MR |
715 | #define vsnprintf git_vsnprintf |
716 | extern int git_vsnprintf(char *str, size_t maxsize, | |
717 | const char *format, va_list ap); | |
718 | #endif | |
719 | ||
726c8ef5 JS |
720 | #ifdef __GLIBC_PREREQ |
721 | #if __GLIBC_PREREQ(2, 1) | |
722 | #define HAVE_STRCHRNUL | |
723 | #endif | |
724 | #endif | |
725 | ||
726 | #ifndef HAVE_STRCHRNUL | |
659c69cf | 727 | #define strchrnul gitstrchrnul |
9e79f00f AE |
728 | static inline char *gitstrchrnul(const char *s, int c) |
729 | { | |
730 | while (*s && *s != c) | |
731 | s++; | |
732 | return (char *)s; | |
733 | } | |
659c69cf RS |
734 | #endif |
735 | ||
da523cc5 MP |
736 | #ifdef NO_INET_PTON |
737 | int inet_pton(int af, const char *src, void *dst); | |
738 | #endif | |
739 | ||
740 | #ifdef NO_INET_NTOP | |
741 | const char *inet_ntop(int af, const void *src, char *dst, size_t size); | |
742 | #endif | |
743 | ||
0f4b6db3 EB |
744 | #ifdef NO_PTHREADS |
745 | #define atexit git_atexit | |
746 | extern int git_atexit(void (*handler)(void)); | |
747 | #endif | |
748 | ||
7c3ecb32 | 749 | extern void release_pack_memory(size_t); |
97bfeb34 | 750 | |
851c34b0 JS |
751 | typedef void (*try_to_free_t)(size_t); |
752 | extern try_to_free_t set_try_to_free_routine(try_to_free_t); | |
320d0b49 JK |
753 | |
754 | static inline size_t st_add(size_t a, size_t b) | |
755 | { | |
756 | if (unsigned_add_overflows(a, b)) | |
757 | die("size_t overflow: %"PRIuMAX" + %"PRIuMAX, | |
758 | (uintmax_t)a, (uintmax_t)b); | |
759 | return a + b; | |
760 | } | |
d616fbf2 ES |
761 | #define st_add3(a,b,c) st_add(st_add((a),(b)),(c)) |
762 | #define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d)) | |
320d0b49 JK |
763 | |
764 | static inline size_t st_mult(size_t a, size_t b) | |
765 | { | |
766 | if (unsigned_mult_overflows(a, b)) | |
767 | die("size_t overflow: %"PRIuMAX" * %"PRIuMAX, | |
768 | (uintmax_t)a, (uintmax_t)b); | |
769 | return a * b; | |
770 | } | |
771 | ||
772 | static inline size_t st_sub(size_t a, size_t b) | |
773 | { | |
774 | if (a < b) | |
775 | die("size_t underflow: %"PRIuMAX" - %"PRIuMAX, | |
776 | (uintmax_t)a, (uintmax_t)b); | |
777 | return a - b; | |
778 | } | |
a9a74636 | 779 | |
61f76a36 KS |
780 | #ifdef HAVE_ALLOCA_H |
781 | # include <alloca.h> | |
782 | # define xalloca(size) (alloca(size)) | |
783 | # define xalloca_free(p) do {} while (0) | |
784 | #else | |
785 | # define xalloca(size) (xmalloc(size)) | |
786 | # define xalloca_free(p) (free(p)) | |
787 | #endif | |
112db553 LT |
788 | extern char *xstrdup(const char *str); |
789 | extern void *xmalloc(size_t size); | |
5bf9219d | 790 | extern void *xmallocz(size_t size); |
f8bb1d94 | 791 | extern void *xmallocz_gently(size_t size); |
112db553 LT |
792 | extern void *xmemdupz(const void *data, size_t len); |
793 | extern char *xstrndup(const char *str, size_t len); | |
794 | extern void *xrealloc(void *ptr, size_t size); | |
795 | extern void *xcalloc(size_t nmemb, size_t size); | |
796 | extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
1570856b | 797 | extern void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
3ff53df7 | 798 | extern int xopen(const char *path, int flags, ...); |
112db553 LT |
799 | extern ssize_t xread(int fd, void *buf, size_t len); |
800 | extern ssize_t xwrite(int fd, const void *buf, size_t len); | |
9aa91af0 | 801 | extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset); |
112db553 | 802 | extern int xdup(int fd); |
260eec29 | 803 | extern FILE *xfopen(const char *path, const char *mode); |
112db553 LT |
804 | extern FILE *xfdopen(int fd, const char *mode); |
805 | extern int xmkstemp(char *template); | |
463db9b1 | 806 | extern int xmkstemp_mode(char *template, int mode); |
aa14e980 | 807 | extern char *xgetcwd(void); |
79d7582e | 808 | extern FILE *fopen_for_writing(const char *path); |
e9d983f1 | 809 | extern FILE *fopen_or_warn(const char *path, const char *mode); |
f21a47b2 | 810 | |
e7792a74 JK |
811 | #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc))) |
812 | #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc))) | |
3ac22f82 | 813 | |
60566cbb RS |
814 | #define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \ |
815 | BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src)))) | |
816 | static inline void copy_array(void *dst, const void *src, size_t n, size_t size) | |
817 | { | |
818 | if (n) | |
819 | memcpy(dst, src, st_mult(size, n)); | |
820 | } | |
821 | ||
36895391 JK |
822 | /* |
823 | * These functions help you allocate structs with flex arrays, and copy | |
824 | * the data directly into the array. For example, if you had: | |
825 | * | |
826 | * struct foo { | |
827 | * int bar; | |
828 | * char name[FLEX_ARRAY]; | |
829 | * }; | |
830 | * | |
831 | * you can do: | |
832 | * | |
833 | * struct foo *f; | |
834 | * FLEX_ALLOC_MEM(f, name, src, len); | |
835 | * | |
836 | * to allocate a "foo" with the contents of "src" in the "name" field. | |
837 | * The resulting struct is automatically zero'd, and the flex-array field | |
838 | * is NUL-terminated (whether the incoming src buffer was or not). | |
839 | * | |
840 | * The FLEXPTR_* variants operate on structs that don't use flex-arrays, | |
841 | * but do want to store a pointer to some extra data in the same allocated | |
842 | * block. For example, if you have: | |
843 | * | |
844 | * struct foo { | |
845 | * char *name; | |
846 | * int bar; | |
847 | * }; | |
848 | * | |
849 | * you can do: | |
850 | * | |
851 | * struct foo *f; | |
0bb1519f | 852 | * FLEXPTR_ALLOC_STR(f, name, src); |
36895391 JK |
853 | * |
854 | * and "name" will point to a block of memory after the struct, which will be | |
855 | * freed along with the struct (but the pointer can be repointed anywhere). | |
856 | * | |
857 | * The *_STR variants accept a string parameter rather than a ptr/len | |
858 | * combination. | |
859 | * | |
860 | * Note that these macros will evaluate the first parameter multiple | |
861 | * times, and it must be assignable as an lvalue. | |
862 | */ | |
863 | #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \ | |
e9451782 RS |
864 | size_t flex_array_len_ = (len); \ |
865 | (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ | |
866 | memcpy((void *)(x)->flexname, (buf), flex_array_len_); \ | |
36895391 JK |
867 | } while (0) |
868 | #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \ | |
0ac52a38 RS |
869 | size_t flex_array_len_ = (len); \ |
870 | (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \ | |
871 | memcpy((x) + 1, (buf), flex_array_len_); \ | |
36895391 JK |
872 | (x)->ptrname = (void *)((x)+1); \ |
873 | } while(0) | |
874 | #define FLEX_ALLOC_STR(x, flexname, str) \ | |
875 | FLEX_ALLOC_MEM((x), flexname, (str), strlen(str)) | |
876 | #define FLEXPTR_ALLOC_STR(x, ptrname, str) \ | |
877 | FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str)) | |
878 | ||
d64ea0f8 JK |
879 | static inline char *xstrdup_or_null(const char *str) |
880 | { | |
881 | return str ? xstrdup(str) : NULL; | |
882 | } | |
883 | ||
dc49cd76 SP |
884 | static inline size_t xsize_t(off_t len) |
885 | { | |
46be82df TR |
886 | if (len > (size_t) len) |
887 | die("Cannot handle files this big"); | |
dc49cd76 SP |
888 | return (size_t)len; |
889 | } | |
890 | ||
7b03c89e JK |
891 | __attribute__((format (printf, 3, 4))) |
892 | extern int xsnprintf(char *dst, size_t max, const char *fmt, ...); | |
893 | ||
da25bdb7 RS |
894 | #ifndef HOST_NAME_MAX |
895 | #define HOST_NAME_MAX 256 | |
896 | #endif | |
897 | ||
5781a9a2 DT |
898 | extern int xgethostname(char *buf, size_t len); |
899 | ||
f1589d10 | 900 | /* in ctype.c, for kwset users */ |
189c860c | 901 | extern const unsigned char tolower_trans_tbl[256]; |
f1589d10 | 902 | |
4050c0df | 903 | /* Sane ctype - no locale, and works with signed chars */ |
c2e9364a | 904 | #undef isascii |
4050c0df JH |
905 | #undef isspace |
906 | #undef isdigit | |
907 | #undef isalpha | |
908 | #undef isalnum | |
0fcec2ce | 909 | #undef isprint |
43ccdf56 NK |
910 | #undef islower |
911 | #undef isupper | |
4050c0df JH |
912 | #undef tolower |
913 | #undef toupper | |
1c149ab2 NTND |
914 | #undef iscntrl |
915 | #undef ispunct | |
916 | #undef isxdigit | |
2adf7247 | 917 | |
ca5ab7d1 | 918 | extern const unsigned char sane_ctype[256]; |
4050c0df JH |
919 | #define GIT_SPACE 0x01 |
920 | #define GIT_DIGIT 0x02 | |
921 | #define GIT_ALPHA 0x04 | |
8cc32992 | 922 | #define GIT_GLOB_SPECIAL 0x08 |
f9b7cce6 | 923 | #define GIT_REGEX_SPECIAL 0x10 |
2f6c9760 | 924 | #define GIT_PATHSPEC_MAGIC 0x20 |
1c149ab2 NTND |
925 | #define GIT_CNTRL 0x40 |
926 | #define GIT_PUNCT 0x80 | |
4050c0df | 927 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) |
c2e9364a | 928 | #define isascii(x) (((x) & ~0x7f) == 0) |
4050c0df JH |
929 | #define isspace(x) sane_istest(x,GIT_SPACE) |
930 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
931 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
932 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
0fcec2ce | 933 | #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) |
43ccdf56 NK |
934 | #define islower(x) sane_iscase(x, 1) |
935 | #define isupper(x) sane_iscase(x, 0) | |
8cc32992 | 936 | #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) |
f9b7cce6 | 937 | #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) |
1c149ab2 NTND |
938 | #define iscntrl(x) (sane_istest(x,GIT_CNTRL)) |
939 | #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ | |
940 | GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) | |
50a71776 | 941 | #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) |
4050c0df JH |
942 | #define tolower(x) sane_case((unsigned char)(x), 0x20) |
943 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
2f6c9760 | 944 | #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) |
4050c0df JH |
945 | |
946 | static inline int sane_case(int x, int high) | |
947 | { | |
948 | if (sane_istest(x, GIT_ALPHA)) | |
949 | x = (x & ~0x20) | high; | |
950 | return x; | |
951 | } | |
952 | ||
43ccdf56 NK |
953 | static inline int sane_iscase(int x, int is_lower) |
954 | { | |
955 | if (!sane_istest(x, GIT_ALPHA)) | |
956 | return 0; | |
957 | ||
958 | if (is_lower) | |
959 | return (x & 0x20) != 0; | |
960 | else | |
961 | return (x & 0x20) == 0; | |
962 | } | |
963 | ||
6aead43d JM |
964 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) |
965 | { | |
966 | unsigned long ul; | |
967 | char *p; | |
968 | ||
969 | errno = 0; | |
e6f2599c MM |
970 | /* negative values would be accepted by strtoul */ |
971 | if (strchr(s, '-')) | |
972 | return -1; | |
6aead43d JM |
973 | ul = strtoul(s, &p, base); |
974 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
975 | return -1; | |
976 | *result = ul; | |
977 | return 0; | |
978 | } | |
979 | ||
7791ecbc JH |
980 | static inline int strtol_i(char const *s, int base, int *result) |
981 | { | |
982 | long ul; | |
983 | char *p; | |
984 | ||
985 | errno = 0; | |
986 | ul = strtol(s, &p, base); | |
987 | if (errno || *p || p == s || (int) ul != ul) | |
988 | return -1; | |
989 | *result = ul; | |
990 | return 0; | |
991 | } | |
992 | ||
43fe901b BD |
993 | #ifdef INTERNAL_QSORT |
994 | void git_qsort(void *base, size_t nmemb, size_t size, | |
995 | int(*compar)(const void *, const void *)); | |
996 | #define qsort git_qsort | |
997 | #endif | |
998 | ||
dbc540c7 RS |
999 | #define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar) |
1000 | static inline void sane_qsort(void *base, size_t nmemb, size_t size, | |
1001 | int(*compar)(const void *, const void *)) | |
1002 | { | |
1003 | if (nmemb > 1) | |
1004 | qsort(base, nmemb, size, compar); | |
1005 | } | |
1006 | ||
04ee8b87 RS |
1007 | #ifndef HAVE_ISO_QSORT_S |
1008 | int git_qsort_s(void *base, size_t nmemb, size_t size, | |
1009 | int (*compar)(const void *, const void *, void *), void *ctx); | |
1010 | #define qsort_s git_qsort_s | |
1011 | #endif | |
1012 | ||
3ca86994 RS |
1013 | #define QSORT_S(base, n, compar, ctx) do { \ |
1014 | if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \ | |
1015 | die("BUG: qsort_s() failed"); \ | |
1016 | } while (0) | |
1017 | ||
2f895225 JS |
1018 | #ifndef REG_STARTEND |
1019 | #error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd" | |
1020 | #endif | |
1021 | ||
1022 | static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size, | |
1023 | size_t nmatch, regmatch_t pmatch[], int eflags) | |
1024 | { | |
1025 | assert(nmatch > 0 && pmatch); | |
1026 | pmatch[0].rm_so = 0; | |
1027 | pmatch[0].rm_eo = size; | |
1028 | return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND); | |
1029 | } | |
1030 | ||
81a24b52 AR |
1031 | #ifndef DIR_HAS_BSD_GROUP_SEMANTICS |
1032 | # define FORCE_DIR_SET_GID S_ISGID | |
1033 | #else | |
1034 | # define FORCE_DIR_SET_GID 0 | |
1035 | #endif | |
1036 | ||
c06ff490 KB |
1037 | #ifdef NO_NSEC |
1038 | #undef USE_NSEC | |
1039 | #define ST_CTIME_NSEC(st) 0 | |
1040 | #define ST_MTIME_NSEC(st) 0 | |
1041 | #else | |
c567383b BG |
1042 | #ifdef USE_ST_TIMESPEC |
1043 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) | |
1044 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) | |
1045 | #else | |
c06ff490 KB |
1046 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) |
1047 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) | |
1048 | #endif | |
c567383b | 1049 | #endif |
c06ff490 | 1050 | |
34779c53 JS |
1051 | #ifdef UNRELIABLE_FSTAT |
1052 | #define fstat_is_reliable() 0 | |
1053 | #else | |
1054 | #define fstat_is_reliable() 1 | |
1055 | #endif | |
1056 | ||
ab8632ae | 1057 | #ifndef va_copy |
26db0f2e JN |
1058 | /* |
1059 | * Since an obvious implementation of va_list would be to make it a | |
1060 | * pointer into the stack frame, a simple assignment will work on | |
1061 | * many systems. But let's try to be more portable. | |
1062 | */ | |
1063 | #ifdef __va_copy | |
1064 | #define va_copy(dst, src) __va_copy(dst, src) | |
1065 | #else | |
1066 | #define va_copy(dst, src) ((dst) = (src)) | |
1067 | #endif | |
ab8632ae JK |
1068 | #endif |
1069 | ||
f51140c2 | 1070 | #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS) |
e05bed96 KB |
1071 | #define HAVE_VARIADIC_MACROS 1 |
1072 | #endif | |
1073 | ||
d8193743 JK |
1074 | #ifdef HAVE_VARIADIC_MACROS |
1075 | __attribute__((format (printf, 3, 4))) NORETURN | |
1076 | void BUG_fl(const char *file, int line, const char *fmt, ...); | |
1077 | #define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__) | |
1078 | #else | |
1079 | __attribute__((format (printf, 1, 2))) NORETURN | |
1080 | void BUG(const char *fmt, ...); | |
1081 | #endif | |
1082 | ||
fc71db39 AR |
1083 | /* |
1084 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
1054af7d RS |
1085 | * Returns 0 on success, which includes trying to unlink an object that does |
1086 | * not exist. | |
fc71db39 AR |
1087 | */ |
1088 | int unlink_or_warn(const char *path); | |
9ccc0c08 RS |
1089 | /* |
1090 | * Tries to unlink file. Returns 0 if unlink succeeded | |
1091 | * or the file already didn't exist. Returns -1 and | |
1092 | * appends a message to err suitable for | |
1093 | * 'error("%s", err->buf)' on error. | |
1094 | */ | |
1095 | int unlink_or_msg(const char *file, struct strbuf *err); | |
d1723296 | 1096 | /* |
1054af7d RS |
1097 | * Preserves errno, prints a message, but gives no warning for ENOENT. |
1098 | * Returns 0 on success, which includes trying to remove a directory that does | |
1099 | * not exist. | |
d1723296 PC |
1100 | */ |
1101 | int rmdir_or_warn(const char *path); | |
80d706af PC |
1102 | /* |
1103 | * Calls the correct function out of {unlink,rmdir}_or_warn based on | |
1104 | * the supplied file mode. | |
1105 | */ | |
1106 | int remove_or_warn(unsigned int mode, const char *path); | |
fc71db39 | 1107 | |
e5c52c98 JN |
1108 | /* |
1109 | * Call access(2), but warn for any error except "missing file" | |
1110 | * (ENOENT or ENOTDIR). | |
1111 | */ | |
4698c8fe JN |
1112 | #define ACCESS_EACCES_OK (1U << 0) |
1113 | int access_or_warn(const char *path, int mode, unsigned flag); | |
1114 | int access_or_die(const char *path, int mode, unsigned flag); | |
ba8bd830 | 1115 | |
11dc1fcb NTND |
1116 | /* Warn on an inaccessible file if errno indicates this is an error */ |
1117 | int warn_on_fopen_errors(const char *path); | |
55b38a48 | 1118 | |
66547547 JK |
1119 | #ifdef GMTIME_UNRELIABLE_ERRORS |
1120 | struct tm *git_gmtime(const time_t *); | |
1121 | struct tm *git_gmtime_r(const time_t *, struct tm *); | |
1122 | #define gmtime git_gmtime | |
1123 | #define gmtime_r git_gmtime_r | |
1124 | #endif | |
1125 | ||
290c8e7a KM |
1126 | #if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__) |
1127 | #define USE_PARENS_AROUND_GETTEXT_N 1 | |
1128 | #endif | |
1129 | ||
1b56cdf9 KM |
1130 | #ifndef SHELL_PATH |
1131 | # define SHELL_PATH "/bin/sh" | |
1132 | #endif | |
1133 | ||
f43cce23 JK |
1134 | #ifndef _POSIX_THREAD_SAFE_FUNCTIONS |
1135 | #define flockfile(fh) | |
1136 | #define funlockfile(fh) | |
1137 | #define getc_unlocked(fh) getc(fh) | |
1138 | #endif | |
1139 | ||
dc5a18b3 JH |
1140 | /* |
1141 | * Our code often opens a path to an optional file, to work on its | |
1142 | * contents when we can successfully open it. We can ignore a failure | |
1143 | * to open if such an optional file does not exist, but we do want to | |
1144 | * report a failure in opening for other reasons (e.g. we got an I/O | |
1145 | * error, or the file is there, but we lack the permission to open). | |
1146 | * | |
1147 | * Call this function after seeing an error from open() or fopen() to | |
1148 | * see if the errno indicates a missing file that we can safely ignore. | |
1149 | */ | |
1150 | static inline int is_missing_file_error(int errno_) | |
1151 | { | |
1152 | return (errno_ == ENOENT || errno_ == ENOTDIR); | |
1153 | } | |
1154 | ||
3f2e2297 | 1155 | extern int cmd_main(int, const char **); |
5c238e29 JK |
1156 | |
1157 | #endif |