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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 | ||
8723f216 NP |
99 | #ifdef __GNUC__ |
100 | #define TYPEOF(x) (__typeof__(x)) | |
101 | #else | |
102 | #define TYPEOF(x) | |
103 | #endif | |
104 | ||
f630cfda | 105 | #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits)))) |
db7244bd | 106 | #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ |
8723f216 | 107 | |
98cb6f30 PH |
108 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
109 | ||
cf606e3d AW |
110 | /* Approximation of the length of the decimal representation of this type. */ |
111 | #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) | |
112 | ||
4cb18a49 BC |
113 | #if defined(__sun__) |
114 | /* | |
115 | * On Solaris, when _XOPEN_EXTENDED is set, its header file | |
116 | * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE | |
117 | * setting to say we are XPG5 or XPG6. Also on Solaris, | |
118 | * XPG6 programs must be compiled with a c99 compiler, while | |
119 | * non XPG6 programs must be compiled with a pre-c99 compiler. | |
120 | */ | |
121 | # if __STDC_VERSION__ - 0 >= 199901L | |
122 | # define _XOPEN_SOURCE 600 | |
123 | # else | |
124 | # define _XOPEN_SOURCE 500 | |
125 | # endif | |
6555b196 | 126 | #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ |
6c109904 | 127 | !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ |
3a0a3a89 RJ |
128 | !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ |
129 | !defined(__CYGWIN__) | |
85023577 JH |
130 | #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ |
131 | #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ | |
c902c9a6 | 132 | #endif |
fb952206 JR |
133 | #define _ALL_SOURCE 1 |
134 | #define _GNU_SOURCE 1 | |
135 | #define _BSD_SOURCE 1 | |
f978a99f | 136 | #define _DEFAULT_SOURCE 1 |
9a695fbf | 137 | #define _NETBSD_SOURCE 1 |
9398b859 | 138 | #define _SGI_SOURCE 1 |
85023577 | 139 | |
380395d0 | 140 | #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ |
8453c125 | 141 | # if defined (_MSC_VER) && !defined(_WIN32_WINNT) |
41f29991 RJ |
142 | # define _WIN32_WINNT 0x0502 |
143 | # endif | |
435bdf8c MSO |
144 | #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ |
145 | #include <winsock2.h> | |
146 | #include <windows.h> | |
380395d0 | 147 | #define GIT_WINDOWS_NATIVE |
435bdf8c MSO |
148 | #endif |
149 | ||
4050c0df JH |
150 | #include <unistd.h> |
151 | #include <stdio.h> | |
152 | #include <sys/stat.h> | |
153 | #include <fcntl.h> | |
154 | #include <stddef.h> | |
155 | #include <stdlib.h> | |
156 | #include <stdarg.h> | |
157 | #include <string.h> | |
b3e103da | 158 | #ifdef HAVE_STRINGS_H |
6c109904 JS |
159 | #include <strings.h> /* for strcasecmp() */ |
160 | #endif | |
4050c0df JH |
161 | #include <errno.h> |
162 | #include <limits.h> | |
b2d05e06 | 163 | #ifdef NEEDS_SYS_PARAM_H |
4050c0df | 164 | #include <sys/param.h> |
6ede7205 | 165 | #endif |
4050c0df JH |
166 | #include <sys/types.h> |
167 | #include <dirent.h> | |
85023577 JH |
168 | #include <sys/time.h> |
169 | #include <time.h> | |
170 | #include <signal.h> | |
f4626df5 JS |
171 | #include <assert.h> |
172 | #include <regex.h> | |
173 | #include <utime.h> | |
088d8802 | 174 | #include <syslog.h> |
2844923d | 175 | #ifndef NO_SYS_POLL_H |
fdc12114 | 176 | #include <sys/poll.h> |
2844923d MD |
177 | #else |
178 | #include <poll.h> | |
179 | #endif | |
9529080d KM |
180 | #ifdef HAVE_BSD_SYSCTL |
181 | #include <sys/sysctl.h> | |
182 | #endif | |
2f0aaaf9 | 183 | |
cfc755d3 VR |
184 | #if defined(__MINGW32__) |
185 | /* pull in Windows compatibility stuff */ | |
186 | #include "compat/mingw.h" | |
187 | #elif defined(_MSC_VER) | |
188 | #include "compat/msvc.h" | |
189 | #else | |
1e8fef60 | 190 | #include <sys/utsname.h> |
f4626df5 | 191 | #include <sys/wait.h> |
ebae9ff9 | 192 | #include <sys/resource.h> |
85023577 | 193 | #include <sys/socket.h> |
80bbe72b | 194 | #include <sys/ioctl.h> |
eb80042c | 195 | #include <termios.h> |
2600973f | 196 | #ifndef NO_SYS_SELECT_H |
80bbe72b | 197 | #include <sys/select.h> |
2600973f | 198 | #endif |
85023577 JH |
199 | #include <netinet/in.h> |
200 | #include <netinet/tcp.h> | |
201 | #include <arpa/inet.h> | |
202 | #include <netdb.h> | |
203 | #include <pwd.h> | |
e2770979 | 204 | #include <sys/un.h> |
2844923d | 205 | #ifndef NO_INTTYPES_H |
007e2ba6 | 206 | #include <inttypes.h> |
2844923d MD |
207 | #else |
208 | #include <stdint.h> | |
209 | #endif | |
6c109904 JS |
210 | #ifdef NO_INTPTR_T |
211 | /* | |
212 | * On I16LP32, ILP32 and LP64 "long" is the save bet, however | |
213 | * on LLP86, IL33LLP64 and P64 it needs to be "long long", | |
214 | * while on IP16 and IP16L32 it is "int" (resp. "short") | |
215 | * Size needs to match (or exceed) 'sizeof(void *)'. | |
216 | * We can't take "long long" here as not everybody has it. | |
217 | */ | |
218 | typedef long intptr_t; | |
219 | typedef unsigned long uintptr_t; | |
220 | #endif | |
fb952206 | 221 | #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ |
85023577 | 222 | #include <grp.h> |
fb952206 | 223 | #define _ALL_SOURCE 1 |
41b20017 | 224 | #endif |
85023577 | 225 | |
76759c7d TB |
226 | /* used on Mac OS X */ |
227 | #ifdef PRECOMPOSE_UNICODE | |
228 | #include "compat/precompose_utf8.h" | |
229 | #else | |
230 | #define precompose_str(in,i_nfd2nfc) | |
231 | #define precompose_argv(c,v) | |
232 | #define probe_utf8_pathname_composition(a,b) | |
233 | #endif | |
234 | ||
0539ecfd JS |
235 | #ifdef MKDIR_WO_TRAILING_SLASH |
236 | #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) | |
237 | extern int compat_mkdir_wo_trailing_slash(const char*, mode_t); | |
238 | #endif | |
239 | ||
7f9e848c JS |
240 | #ifdef NO_STRUCT_ITIMERVAL |
241 | struct itimerval { | |
242 | struct timeval it_interval; | |
243 | struct timeval it_value; | |
981ff520 | 244 | }; |
7f9e848c JS |
245 | #endif |
246 | ||
247 | #ifdef NO_SETITIMER | |
248 | #define setitimer(which,value,ovalue) | |
249 | #endif | |
250 | ||
e1c06886 DA |
251 | #ifndef NO_LIBGEN_H |
252 | #include <libgen.h> | |
253 | #else | |
254 | #define basename gitbasename | |
255 | extern char *gitbasename(char *); | |
256 | #endif | |
257 | ||
85023577 JH |
258 | #ifndef NO_ICONV |
259 | #include <iconv.h> | |
260 | #endif | |
4050c0df | 261 | |
684ec6c6 | 262 | #ifndef NO_OPENSSL |
88c03eb5 | 263 | #ifdef __APPLE__ |
b195aa00 | 264 | #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 |
88c03eb5 KM |
265 | #include <AvailabilityMacros.h> |
266 | #undef DEPRECATED_ATTRIBUTE | |
267 | #define DEPRECATED_ATTRIBUTE | |
268 | #undef __AVAILABILITY_MACROS_USES_AVAILABILITY | |
269 | #endif | |
684ec6c6 RS |
270 | #include <openssl/ssl.h> |
271 | #include <openssl/err.h> | |
88e01181 RH |
272 | #ifdef NO_HMAC_CTX_CLEANUP |
273 | #define HMAC_CTX_cleanup HMAC_cleanup | |
274 | #endif | |
684ec6c6 RS |
275 | #endif |
276 | ||
3b130ade DM |
277 | /* On most systems <netdb.h> would have given us this, but |
278 | * not on some systems (e.g. z/OS). | |
279 | */ | |
280 | #ifndef NI_MAXHOST | |
281 | #define NI_MAXHOST 1025 | |
282 | #endif | |
283 | ||
284 | #ifndef NI_MAXSERV | |
285 | #define NI_MAXSERV 32 | |
286 | #endif | |
287 | ||
d0c2449f JH |
288 | /* On most systems <limits.h> would have given us this, but |
289 | * not on some systems (e.g. GNU/Hurd). | |
290 | */ | |
291 | #ifndef PATH_MAX | |
292 | #define PATH_MAX 4096 | |
293 | #endif | |
294 | ||
c4001d92 SP |
295 | #ifndef PRIuMAX |
296 | #define PRIuMAX "llu" | |
297 | #endif | |
298 | ||
607bb3ff JS |
299 | #ifndef PRIu32 |
300 | #define PRIu32 "u" | |
301 | #endif | |
302 | ||
303 | #ifndef PRIx32 | |
304 | #define PRIx32 "x" | |
305 | #endif | |
306 | ||
5418d96d RJ |
307 | #ifndef PRIo32 |
308 | #define PRIo32 "o" | |
309 | #endif | |
310 | ||
80ba074f JS |
311 | #ifndef PATH_SEP |
312 | #define PATH_SEP ':' | |
313 | #endif | |
314 | ||
cb6a22c0 CW |
315 | #ifdef HAVE_PATHS_H |
316 | #include <paths.h> | |
317 | #endif | |
318 | #ifndef _PATH_DEFPATH | |
319 | #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" | |
320 | #endif | |
321 | ||
23326d14 JS |
322 | #ifndef STRIP_EXTENSION |
323 | #define STRIP_EXTENSION "" | |
324 | #endif | |
325 | ||
25fe217b | 326 | #ifndef has_dos_drive_prefix |
bf728346 RS |
327 | static inline int git_has_dos_drive_prefix(const char *path) |
328 | { | |
329 | return 0; | |
330 | } | |
331 | #define has_dos_drive_prefix git_has_dos_drive_prefix | |
25fe217b JS |
332 | #endif |
333 | ||
bf728346 RS |
334 | #ifndef is_dir_sep |
335 | static inline int git_is_dir_sep(int c) | |
336 | { | |
337 | return c == '/'; | |
338 | } | |
339 | #define is_dir_sep git_is_dir_sep | |
c2369bdf CZ |
340 | #endif |
341 | ||
bf728346 RS |
342 | #ifndef offset_1st_component |
343 | static inline int git_offset_1st_component(const char *path) | |
344 | { | |
345 | return is_dir_sep(path[0]); | |
346 | } | |
347 | #define offset_1st_component git_offset_1st_component | |
25fe217b JS |
348 | #endif |
349 | ||
d1c69255 | 350 | #ifndef find_last_dir_sep |
bf728346 RS |
351 | static inline char *git_find_last_dir_sep(const char *path) |
352 | { | |
353 | return strrchr(path, '/'); | |
354 | } | |
355 | #define find_last_dir_sep git_find_last_dir_sep | |
d1c69255 TN |
356 | #endif |
357 | ||
e4ac953b | 358 | #if defined(__HP_cc) && (__HP_cc >= 61000) |
b6ab349b MR |
359 | #define NORETURN __attribute__((noreturn)) |
360 | #define NORETURN_PTR | |
6520c846 | 361 | #elif defined(__GNUC__) && !defined(NO_NORETURN) |
4050c0df | 362 | #define NORETURN __attribute__((__noreturn__)) |
18660bc9 | 363 | #define NORETURN_PTR __attribute__((__noreturn__)) |
aba7dea8 RJ |
364 | #elif defined(_MSC_VER) |
365 | #define NORETURN __declspec(noreturn) | |
366 | #define NORETURN_PTR | |
4050c0df JH |
367 | #else |
368 | #define NORETURN | |
18660bc9 | 369 | #define NORETURN_PTR |
8cd7ebc8 | 370 | #ifndef __GNUC__ |
4050c0df JH |
371 | #ifndef __attribute__ |
372 | #define __attribute__(x) | |
373 | #endif | |
374 | #endif | |
8cd7ebc8 | 375 | #endif |
4050c0df | 376 | |
9fe3edc4 RJ |
377 | /* The sentinel attribute is valid from gcc version 4.0 */ |
378 | #if defined(__GNUC__) && (__GNUC__ >= 4) | |
379 | #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) | |
380 | #else | |
381 | #define LAST_ARG_MUST_BE_NULL | |
382 | #endif | |
383 | ||
51ea5519 NP |
384 | #include "compat/bswap.h" |
385 | ||
cebcab18 | 386 | #include "wildmatch.h" |
cebcab18 | 387 | |
9ccc0c08 RS |
388 | struct strbuf; |
389 | ||
4050c0df | 390 | /* General helper functions */ |
ebaa79f4 | 391 | extern void vreportf(const char *prefix, const char *err, va_list params); |
3bc4181f | 392 | extern void vwritef(int fd, const char *prefix, const char *err, va_list params); |
a4f3131c | 393 | extern NORETURN void usage(const char *err); |
64b1cb74 | 394 | extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); |
a4f3131c EFL |
395 | extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); |
396 | extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
4050c0df | 397 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
46efd2d9 | 398 | extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); |
4050c0df | 399 | |
f2be034c BG |
400 | #ifndef NO_OPENSSL |
401 | #ifdef APPLE_COMMON_CRYPTO | |
402 | #include "compat/apple-common-crypto.h" | |
403 | #else | |
404 | #include <openssl/evp.h> | |
405 | #include <openssl/hmac.h> | |
406 | #endif /* APPLE_COMMON_CRYPTO */ | |
407 | #include <openssl/x509v3.h> | |
408 | #endif /* NO_OPENSSL */ | |
409 | ||
e208f9cc JK |
410 | /* |
411 | * Let callers be aware of the constant return value; this can help | |
9798f7e5 MK |
412 | * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, |
413 | * because some compilers may not support variadic macros. Since we're only | |
414 | * trying to help gcc, anyway, it's OK; other compilers will fall back to | |
415 | * using the function as usual. | |
e208f9cc | 416 | */ |
ff0a80af | 417 | #if defined(__GNUC__) |
87fe5df3 JK |
418 | static inline int const_error(void) |
419 | { | |
420 | return -1; | |
421 | } | |
422 | #define error(...) (error(__VA_ARGS__), const_error()) | |
e208f9cc JK |
423 | #endif |
424 | ||
18660bc9 | 425 | extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)); |
3bc4181f | 426 | extern void set_error_routine(void (*routine)(const char *err, va_list params)); |
c19a490e | 427 | extern void set_die_is_recursing_routine(int (*routine)(void)); |
39a3f5ea | 428 | |
95662315 | 429 | extern int starts_with(const char *str, const char *prefix); |
698a68be | 430 | |
cf4fff57 JK |
431 | /* |
432 | * If the string "str" begins with the string found in "prefix", return 1. | |
433 | * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in | |
434 | * the string right after the prefix). | |
435 | * | |
436 | * Otherwise, return 0 and leave "out" untouched. | |
437 | * | |
438 | * Examples: | |
439 | * | |
440 | * [extract branch name, fail if not a branch] | |
441 | * if (!skip_prefix(ref, "refs/heads/", &branch) | |
442 | * return -1; | |
443 | * | |
444 | * [skip prefix if present, otherwise use whole string] | |
445 | * skip_prefix(name, "refs/heads/", &name); | |
446 | */ | |
447 | static inline int skip_prefix(const char *str, const char *prefix, | |
448 | const char **out) | |
fbca5837 | 449 | { |
ba399c46 | 450 | do { |
cf4fff57 JK |
451 | if (!*prefix) { |
452 | *out = str; | |
453 | return 1; | |
454 | } | |
ba399c46 | 455 | } while (*str++ == *prefix++); |
cf4fff57 | 456 | return 0; |
fbca5837 MV |
457 | } |
458 | ||
35480f0b JK |
459 | /* |
460 | * If buf ends with suffix, return 1 and subtract the length of the suffix | |
461 | * from *len. Otherwise, return 0 and leave *len untouched. | |
462 | */ | |
463 | static inline int strip_suffix_mem(const char *buf, size_t *len, | |
464 | const char *suffix) | |
465 | { | |
466 | size_t suflen = strlen(suffix); | |
467 | if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) | |
468 | return 0; | |
469 | *len -= suflen; | |
470 | return 1; | |
471 | } | |
472 | ||
473 | /* | |
474 | * If str ends with suffix, return 1 and set *len to the size of the string | |
475 | * without the suffix. Otherwise, return 0 and set *len to the size of the | |
476 | * string. | |
477 | * | |
478 | * Note that we do _not_ NUL-terminate str to the new length. | |
479 | */ | |
480 | static inline int strip_suffix(const char *str, const char *suffix, size_t *len) | |
481 | { | |
482 | *len = strlen(str); | |
483 | return strip_suffix_mem(str, len, suffix); | |
484 | } | |
485 | ||
f52a35fd JK |
486 | static inline int ends_with(const char *str, const char *suffix) |
487 | { | |
488 | size_t len; | |
489 | return strip_suffix(str, suffix, &len); | |
490 | } | |
491 | ||
b130a72b | 492 | #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) |
4050c0df JH |
493 | |
494 | #ifndef PROT_READ | |
495 | #define PROT_READ 1 | |
496 | #define PROT_WRITE 2 | |
497 | #define MAP_PRIVATE 1 | |
4050c0df JH |
498 | #endif |
499 | ||
d6779124 SP |
500 | #define mmap git_mmap |
501 | #define munmap git_munmap | |
502 | extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
503 | extern int git_munmap(void *start, size_t length); | |
4050c0df | 504 | |
b130a72b JL |
505 | #else /* NO_MMAP || USE_WIN32_MMAP */ |
506 | ||
507 | #include <sys/mman.h> | |
508 | ||
509 | #endif /* NO_MMAP || USE_WIN32_MMAP */ | |
510 | ||
511 | #ifdef NO_MMAP | |
512 | ||
5faaf246 | 513 | /* This value must be multiple of (pagesize * 2) */ |
8c82534d SP |
514 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) |
515 | ||
4050c0df JH |
516 | #else /* NO_MMAP */ |
517 | ||
5faaf246 | 518 | /* This value must be multiple of (pagesize * 2) */ |
22bac0ea SP |
519 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ |
520 | (sizeof(void*) >= 8 \ | |
521 | ? 1 * 1024 * 1024 * 1024 \ | |
522 | : 32 * 1024 * 1024) | |
4050c0df JH |
523 | |
524 | #endif /* NO_MMAP */ | |
525 | ||
fcf3a21a GV |
526 | #ifndef MAP_FAILED |
527 | #define MAP_FAILED ((void *)-1) | |
528 | #endif | |
529 | ||
fdb2a2a6 JH |
530 | #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT |
531 | #define on_disk_bytes(st) ((st).st_size) | |
532 | #else | |
533 | #define on_disk_bytes(st) ((st).st_blocks * 512) | |
534 | #endif | |
535 | ||
d543d9c0 DM |
536 | #ifdef NEEDS_MODE_TRANSLATION |
537 | #undef S_IFMT | |
538 | #undef S_IFREG | |
539 | #undef S_IFDIR | |
540 | #undef S_IFLNK | |
541 | #undef S_IFBLK | |
542 | #undef S_IFCHR | |
543 | #undef S_IFIFO | |
544 | #undef S_IFSOCK | |
545 | #define S_IFMT 0170000 | |
546 | #define S_IFREG 0100000 | |
547 | #define S_IFDIR 0040000 | |
548 | #define S_IFLNK 0120000 | |
549 | #define S_IFBLK 0060000 | |
550 | #define S_IFCHR 0020000 | |
551 | #define S_IFIFO 0010000 | |
552 | #define S_IFSOCK 0140000 | |
553 | #ifdef stat | |
554 | #undef stat | |
555 | #endif | |
556 | #define stat(path, buf) git_stat(path, buf) | |
557 | extern int git_stat(const char *, struct stat *); | |
558 | #ifdef fstat | |
559 | #undef fstat | |
560 | #endif | |
561 | #define fstat(fd, buf) git_fstat(fd, buf) | |
562 | extern int git_fstat(int, struct stat *); | |
563 | #ifdef lstat | |
564 | #undef lstat | |
565 | #endif | |
566 | #define lstat(path, buf) git_lstat(path, buf) | |
567 | extern int git_lstat(const char *, struct stat *); | |
568 | #endif | |
569 | ||
22bac0ea | 570 | #define DEFAULT_PACKED_GIT_LIMIT \ |
ecaebf4a | 571 | ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) |
8c82534d | 572 | |
6900679c SH |
573 | #ifdef NO_PREAD |
574 | #define pread git_pread | |
575 | extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); | |
576 | #endif | |
14086b0a SP |
577 | /* |
578 | * Forward decl that will remind us if its twin in cache.h changes. | |
579 | * This function is used in compat/pread.c. But we can't include | |
580 | * cache.h there. | |
581 | */ | |
582 | extern ssize_t read_in_full(int fd, void *buf, size_t count); | |
6900679c | 583 | |
4050c0df JH |
584 | #ifdef NO_SETENV |
585 | #define setenv gitsetenv | |
586 | extern int gitsetenv(const char *, const char *, int); | |
587 | #endif | |
588 | ||
ca5bb5d5 SP |
589 | #ifdef NO_MKDTEMP |
590 | #define mkdtemp gitmkdtemp | |
591 | extern char *gitmkdtemp(char *); | |
592 | #endif | |
593 | ||
0620b39b DA |
594 | #ifdef NO_MKSTEMPS |
595 | #define mkstemps gitmkstemps | |
596 | extern int gitmkstemps(char *, int); | |
597 | #endif | |
598 | ||
731043fd JR |
599 | #ifdef NO_UNSETENV |
600 | #define unsetenv gitunsetenv | |
601 | extern void gitunsetenv(const char *); | |
602 | #endif | |
603 | ||
4050c0df JH |
604 | #ifdef NO_STRCASESTR |
605 | #define strcasestr gitstrcasestr | |
606 | extern char *gitstrcasestr(const char *haystack, const char *needle); | |
607 | #endif | |
608 | ||
817151e6 PE |
609 | #ifdef NO_STRLCPY |
610 | #define strlcpy gitstrlcpy | |
611 | extern size_t gitstrlcpy(char *, const char *, size_t); | |
612 | #endif | |
613 | ||
bc6b4f52 JR |
614 | #ifdef NO_STRTOUMAX |
615 | #define strtoumax gitstrtoumax | |
616 | extern uintmax_t gitstrtoumax(const char *, char **, int); | |
97000ba6 JS |
617 | #define strtoimax gitstrtoimax |
618 | extern intmax_t gitstrtoimax(const char *, char **, int); | |
bc6b4f52 JR |
619 | #endif |
620 | ||
fa0c87c3 AR |
621 | #ifdef NO_HSTRERROR |
622 | #define hstrerror githstrerror | |
623 | extern const char *githstrerror(int herror); | |
624 | #endif | |
625 | ||
b21b9f1d RS |
626 | #ifdef NO_MEMMEM |
627 | #define memmem gitmemmem | |
628 | void *gitmemmem(const void *haystack, size_t haystacklen, | |
629 | const void *needle, size_t needlelen); | |
630 | #endif | |
631 | ||
40036bed MK |
632 | #ifdef NO_GETPAGESIZE |
633 | #define getpagesize() sysconf(_SC_PAGESIZE) | |
634 | #endif | |
635 | ||
cba22528 | 636 | #ifdef FREAD_READS_DIRECTORIES |
c5445fe0 JS |
637 | #ifdef fopen |
638 | #undef fopen | |
639 | #endif | |
cba22528 BC |
640 | #define fopen(a,b) git_fopen(a,b) |
641 | extern FILE *git_fopen(const char*, const char*); | |
642 | #endif | |
643 | ||
c4582f93 | 644 | #ifdef SNPRINTF_RETURNS_BOGUS |
ab03803c BS |
645 | #ifdef snprintf |
646 | #undef snprintf | |
647 | #endif | |
c4582f93 MR |
648 | #define snprintf git_snprintf |
649 | extern int git_snprintf(char *str, size_t maxsize, | |
650 | const char *format, ...); | |
ab03803c BS |
651 | #ifdef vsnprintf |
652 | #undef vsnprintf | |
653 | #endif | |
c4582f93 MR |
654 | #define vsnprintf git_vsnprintf |
655 | extern int git_vsnprintf(char *str, size_t maxsize, | |
656 | const char *format, va_list ap); | |
657 | #endif | |
658 | ||
726c8ef5 JS |
659 | #ifdef __GLIBC_PREREQ |
660 | #if __GLIBC_PREREQ(2, 1) | |
661 | #define HAVE_STRCHRNUL | |
137c6eaa | 662 | #define HAVE_MEMPCPY |
726c8ef5 JS |
663 | #endif |
664 | #endif | |
665 | ||
666 | #ifndef HAVE_STRCHRNUL | |
659c69cf | 667 | #define strchrnul gitstrchrnul |
9e79f00f AE |
668 | static inline char *gitstrchrnul(const char *s, int c) |
669 | { | |
670 | while (*s && *s != c) | |
671 | s++; | |
672 | return (char *)s; | |
673 | } | |
659c69cf RS |
674 | #endif |
675 | ||
137c6eaa JN |
676 | #ifndef HAVE_MEMPCPY |
677 | #define mempcpy gitmempcpy | |
678 | static inline void *gitmempcpy(void *dest, const void *src, size_t n) | |
679 | { | |
680 | return (char *)memcpy(dest, src, n) + n; | |
681 | } | |
682 | #endif | |
683 | ||
da523cc5 MP |
684 | #ifdef NO_INET_PTON |
685 | int inet_pton(int af, const char *src, void *dst); | |
686 | #endif | |
687 | ||
688 | #ifdef NO_INET_NTOP | |
689 | const char *inet_ntop(int af, const void *src, char *dst, size_t size); | |
690 | #endif | |
691 | ||
0f4b6db3 EB |
692 | #ifdef NO_PTHREADS |
693 | #define atexit git_atexit | |
694 | extern int git_atexit(void (*handler)(void)); | |
695 | #endif | |
696 | ||
7c3ecb32 | 697 | extern void release_pack_memory(size_t); |
97bfeb34 | 698 | |
851c34b0 JS |
699 | typedef void (*try_to_free_t)(size_t); |
700 | extern try_to_free_t set_try_to_free_routine(try_to_free_t); | |
a9a74636 | 701 | |
61f76a36 KS |
702 | #ifdef HAVE_ALLOCA_H |
703 | # include <alloca.h> | |
704 | # define xalloca(size) (alloca(size)) | |
705 | # define xalloca_free(p) do {} while (0) | |
706 | #else | |
707 | # define xalloca(size) (xmalloc(size)) | |
708 | # define xalloca_free(p) (free(p)) | |
709 | #endif | |
112db553 LT |
710 | extern char *xstrdup(const char *str); |
711 | extern void *xmalloc(size_t size); | |
5bf9219d | 712 | extern void *xmallocz(size_t size); |
f8bb1d94 | 713 | extern void *xmallocz_gently(size_t size); |
112db553 LT |
714 | extern void *xmemdupz(const void *data, size_t len); |
715 | extern char *xstrndup(const char *str, size_t len); | |
716 | extern void *xrealloc(void *ptr, size_t size); | |
717 | extern void *xcalloc(size_t nmemb, size_t size); | |
718 | extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
1570856b | 719 | extern void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset); |
112db553 LT |
720 | extern ssize_t xread(int fd, void *buf, size_t len); |
721 | extern ssize_t xwrite(int fd, const void *buf, size_t len); | |
9aa91af0 | 722 | extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset); |
112db553 LT |
723 | extern int xdup(int fd); |
724 | extern FILE *xfdopen(int fd, const char *mode); | |
725 | extern int xmkstemp(char *template); | |
463db9b1 | 726 | extern int xmkstemp_mode(char *template, int mode); |
6e180cdc | 727 | extern int odb_mkstemp(char *template, size_t limit, const char *pattern); |
8640d496 | 728 | extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1); |
aa14e980 | 729 | extern char *xgetcwd(void); |
f21a47b2 | 730 | |
3ac22f82 RS |
731 | #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x))) |
732 | ||
d64ea0f8 JK |
733 | static inline char *xstrdup_or_null(const char *str) |
734 | { | |
735 | return str ? xstrdup(str) : NULL; | |
736 | } | |
737 | ||
dc49cd76 SP |
738 | static inline size_t xsize_t(off_t len) |
739 | { | |
46be82df TR |
740 | if (len > (size_t) len) |
741 | die("Cannot handle files this big"); | |
dc49cd76 SP |
742 | return (size_t)len; |
743 | } | |
744 | ||
f1589d10 | 745 | /* in ctype.c, for kwset users */ |
189c860c | 746 | extern const unsigned char tolower_trans_tbl[256]; |
f1589d10 | 747 | |
4050c0df | 748 | /* Sane ctype - no locale, and works with signed chars */ |
c2e9364a | 749 | #undef isascii |
4050c0df JH |
750 | #undef isspace |
751 | #undef isdigit | |
752 | #undef isalpha | |
753 | #undef isalnum | |
0fcec2ce | 754 | #undef isprint |
43ccdf56 NK |
755 | #undef islower |
756 | #undef isupper | |
4050c0df JH |
757 | #undef tolower |
758 | #undef toupper | |
1c149ab2 NTND |
759 | #undef iscntrl |
760 | #undef ispunct | |
761 | #undef isxdigit | |
2adf7247 | 762 | |
ca5ab7d1 | 763 | extern const unsigned char sane_ctype[256]; |
4050c0df JH |
764 | #define GIT_SPACE 0x01 |
765 | #define GIT_DIGIT 0x02 | |
766 | #define GIT_ALPHA 0x04 | |
8cc32992 | 767 | #define GIT_GLOB_SPECIAL 0x08 |
f9b7cce6 | 768 | #define GIT_REGEX_SPECIAL 0x10 |
2f6c9760 | 769 | #define GIT_PATHSPEC_MAGIC 0x20 |
1c149ab2 NTND |
770 | #define GIT_CNTRL 0x40 |
771 | #define GIT_PUNCT 0x80 | |
4050c0df | 772 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) |
c2e9364a | 773 | #define isascii(x) (((x) & ~0x7f) == 0) |
4050c0df JH |
774 | #define isspace(x) sane_istest(x,GIT_SPACE) |
775 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
776 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
777 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
0fcec2ce | 778 | #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) |
43ccdf56 NK |
779 | #define islower(x) sane_iscase(x, 1) |
780 | #define isupper(x) sane_iscase(x, 0) | |
8cc32992 | 781 | #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) |
f9b7cce6 | 782 | #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) |
1c149ab2 NTND |
783 | #define iscntrl(x) (sane_istest(x,GIT_CNTRL)) |
784 | #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ | |
785 | GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) | |
50a71776 | 786 | #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) |
4050c0df JH |
787 | #define tolower(x) sane_case((unsigned char)(x), 0x20) |
788 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
2f6c9760 | 789 | #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) |
4050c0df JH |
790 | |
791 | static inline int sane_case(int x, int high) | |
792 | { | |
793 | if (sane_istest(x, GIT_ALPHA)) | |
794 | x = (x & ~0x20) | high; | |
795 | return x; | |
796 | } | |
797 | ||
43ccdf56 NK |
798 | static inline int sane_iscase(int x, int is_lower) |
799 | { | |
800 | if (!sane_istest(x, GIT_ALPHA)) | |
801 | return 0; | |
802 | ||
803 | if (is_lower) | |
804 | return (x & 0x20) != 0; | |
805 | else | |
806 | return (x & 0x20) == 0; | |
807 | } | |
808 | ||
6aead43d JM |
809 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) |
810 | { | |
811 | unsigned long ul; | |
812 | char *p; | |
813 | ||
814 | errno = 0; | |
815 | ul = strtoul(s, &p, base); | |
816 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
817 | return -1; | |
818 | *result = ul; | |
819 | return 0; | |
820 | } | |
821 | ||
7791ecbc JH |
822 | static inline int strtol_i(char const *s, int base, int *result) |
823 | { | |
824 | long ul; | |
825 | char *p; | |
826 | ||
827 | errno = 0; | |
828 | ul = strtol(s, &p, base); | |
829 | if (errno || *p || p == s || (int) ul != ul) | |
830 | return -1; | |
831 | *result = ul; | |
832 | return 0; | |
833 | } | |
834 | ||
43fe901b BD |
835 | #ifdef INTERNAL_QSORT |
836 | void git_qsort(void *base, size_t nmemb, size_t size, | |
837 | int(*compar)(const void *, const void *)); | |
838 | #define qsort git_qsort | |
839 | #endif | |
840 | ||
81a24b52 AR |
841 | #ifndef DIR_HAS_BSD_GROUP_SEMANTICS |
842 | # define FORCE_DIR_SET_GID S_ISGID | |
843 | #else | |
844 | # define FORCE_DIR_SET_GID 0 | |
845 | #endif | |
846 | ||
c06ff490 KB |
847 | #ifdef NO_NSEC |
848 | #undef USE_NSEC | |
849 | #define ST_CTIME_NSEC(st) 0 | |
850 | #define ST_MTIME_NSEC(st) 0 | |
851 | #else | |
c567383b BG |
852 | #ifdef USE_ST_TIMESPEC |
853 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) | |
854 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) | |
855 | #else | |
c06ff490 KB |
856 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) |
857 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) | |
858 | #endif | |
c567383b | 859 | #endif |
c06ff490 | 860 | |
34779c53 JS |
861 | #ifdef UNRELIABLE_FSTAT |
862 | #define fstat_is_reliable() 0 | |
863 | #else | |
864 | #define fstat_is_reliable() 1 | |
865 | #endif | |
866 | ||
ab8632ae | 867 | #ifndef va_copy |
26db0f2e JN |
868 | /* |
869 | * Since an obvious implementation of va_list would be to make it a | |
870 | * pointer into the stack frame, a simple assignment will work on | |
871 | * many systems. But let's try to be more portable. | |
872 | */ | |
873 | #ifdef __va_copy | |
874 | #define va_copy(dst, src) __va_copy(dst, src) | |
875 | #else | |
876 | #define va_copy(dst, src) ((dst) = (src)) | |
877 | #endif | |
ab8632ae JK |
878 | #endif |
879 | ||
f51140c2 | 880 | #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS) |
e05bed96 KB |
881 | #define HAVE_VARIADIC_MACROS 1 |
882 | #endif | |
883 | ||
fc71db39 AR |
884 | /* |
885 | * Preserves errno, prints a message, but gives no warning for ENOENT. | |
1054af7d RS |
886 | * Returns 0 on success, which includes trying to unlink an object that does |
887 | * not exist. | |
fc71db39 AR |
888 | */ |
889 | int unlink_or_warn(const char *path); | |
9ccc0c08 RS |
890 | /* |
891 | * Tries to unlink file. Returns 0 if unlink succeeded | |
892 | * or the file already didn't exist. Returns -1 and | |
893 | * appends a message to err suitable for | |
894 | * 'error("%s", err->buf)' on error. | |
895 | */ | |
896 | int unlink_or_msg(const char *file, struct strbuf *err); | |
d1723296 | 897 | /* |
1054af7d RS |
898 | * Preserves errno, prints a message, but gives no warning for ENOENT. |
899 | * Returns 0 on success, which includes trying to remove a directory that does | |
900 | * not exist. | |
d1723296 PC |
901 | */ |
902 | int rmdir_or_warn(const char *path); | |
80d706af PC |
903 | /* |
904 | * Calls the correct function out of {unlink,rmdir}_or_warn based on | |
905 | * the supplied file mode. | |
906 | */ | |
907 | int remove_or_warn(unsigned int mode, const char *path); | |
fc71db39 | 908 | |
e5c52c98 JN |
909 | /* |
910 | * Call access(2), but warn for any error except "missing file" | |
911 | * (ENOENT or ENOTDIR). | |
912 | */ | |
4698c8fe JN |
913 | #define ACCESS_EACCES_OK (1U << 0) |
914 | int access_or_warn(const char *path, int mode, unsigned flag); | |
915 | int access_or_die(const char *path, int mode, unsigned flag); | |
ba8bd830 | 916 | |
55b38a48 JH |
917 | /* Warn on an inaccessible file that ought to be accessible */ |
918 | void warn_on_inaccessible(const char *path); | |
919 | ||
2f705875 JK |
920 | /* Get the passwd entry for the UID of the current process. */ |
921 | struct passwd *xgetpwuid_self(void); | |
922 | ||
66547547 JK |
923 | #ifdef GMTIME_UNRELIABLE_ERRORS |
924 | struct tm *git_gmtime(const time_t *); | |
925 | struct tm *git_gmtime_r(const time_t *, struct tm *); | |
926 | #define gmtime git_gmtime | |
927 | #define gmtime_r git_gmtime_r | |
928 | #endif | |
929 | ||
290c8e7a KM |
930 | #if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__) |
931 | #define USE_PARENS_AROUND_GETTEXT_N 1 | |
932 | #endif | |
933 | ||
1b56cdf9 KM |
934 | #ifndef SHELL_PATH |
935 | # define SHELL_PATH "/bin/sh" | |
936 | #endif | |
937 | ||
f43cce23 JK |
938 | #ifndef _POSIX_THREAD_SAFE_FUNCTIONS |
939 | #define flockfile(fh) | |
940 | #define funlockfile(fh) | |
941 | #define getc_unlocked(fh) getc(fh) | |
942 | #endif | |
943 | ||
4050c0df | 944 | #endif |