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07800601 IM |
1 | #ifndef GIT_COMPAT_UTIL_H |
2 | #define GIT_COMPAT_UTIL_H | |
3 | ||
4 | #define _FILE_OFFSET_BITS 64 | |
5 | ||
6 | #ifndef FLEX_ARRAY | |
7 | /* | |
8 | * See if our compiler is known to support flexible array members. | |
9 | */ | |
10 | #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) | |
11 | # define FLEX_ARRAY /* empty */ | |
12 | #elif defined(__GNUC__) | |
13 | # if (__GNUC__ >= 3) | |
14 | # define FLEX_ARRAY /* empty */ | |
15 | # else | |
16 | # define FLEX_ARRAY 0 /* older GNU extension */ | |
17 | # endif | |
18 | #endif | |
19 | ||
20 | /* | |
21 | * Otherwise, default to safer but a bit wasteful traditional style | |
22 | */ | |
23 | #ifndef FLEX_ARRAY | |
24 | # define FLEX_ARRAY 1 | |
25 | #endif | |
26 | #endif | |
27 | ||
28 | #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) | |
29 | ||
30 | #ifdef __GNUC__ | |
31 | #define TYPEOF(x) (__typeof__(x)) | |
32 | #else | |
33 | #define TYPEOF(x) | |
34 | #endif | |
35 | ||
36 | #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits)))) | |
37 | #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ | |
38 | ||
39 | /* Approximation of the length of the decimal representation of this type. */ | |
40 | #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) | |
41 | ||
42 | #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX) | |
43 | #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ | |
44 | #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ | |
45 | #endif | |
46 | #define _ALL_SOURCE 1 | |
47 | #define _GNU_SOURCE 1 | |
48 | #define _BSD_SOURCE 1 | |
49 | ||
50 | #include <unistd.h> | |
51 | #include <stdio.h> | |
52 | #include <sys/stat.h> | |
53 | #include <fcntl.h> | |
54 | #include <stddef.h> | |
55 | #include <stdlib.h> | |
56 | #include <stdarg.h> | |
57 | #include <string.h> | |
58 | #include <errno.h> | |
59 | #include <limits.h> | |
60 | #include <sys/param.h> | |
61 | #include <sys/types.h> | |
62 | #include <dirent.h> | |
63 | #include <sys/time.h> | |
64 | #include <time.h> | |
65 | #include <signal.h> | |
66 | #include <fnmatch.h> | |
67 | #include <assert.h> | |
68 | #include <regex.h> | |
69 | #include <utime.h> | |
07800601 IM |
70 | #include <sys/wait.h> |
71 | #include <sys/poll.h> | |
72 | #include <sys/socket.h> | |
73 | #include <sys/ioctl.h> | |
74 | #ifndef NO_SYS_SELECT_H | |
75 | #include <sys/select.h> | |
76 | #endif | |
77 | #include <netinet/in.h> | |
78 | #include <netinet/tcp.h> | |
79 | #include <arpa/inet.h> | |
80 | #include <netdb.h> | |
81 | #include <pwd.h> | |
82 | #include <inttypes.h> | |
07800601 IM |
83 | |
84 | #ifndef NO_ICONV | |
85 | #include <iconv.h> | |
86 | #endif | |
87 | ||
07800601 IM |
88 | /* On most systems <limits.h> would have given us this, but |
89 | * not on some systems (e.g. GNU/Hurd). | |
90 | */ | |
91 | #ifndef PATH_MAX | |
92 | #define PATH_MAX 4096 | |
93 | #endif | |
94 | ||
95 | #ifndef PRIuMAX | |
96 | #define PRIuMAX "llu" | |
97 | #endif | |
98 | ||
99 | #ifndef PRIu32 | |
100 | #define PRIu32 "u" | |
101 | #endif | |
102 | ||
103 | #ifndef PRIx32 | |
104 | #define PRIx32 "x" | |
105 | #endif | |
106 | ||
107 | #ifndef PATH_SEP | |
108 | #define PATH_SEP ':' | |
109 | #endif | |
110 | ||
111 | #ifndef STRIP_EXTENSION | |
112 | #define STRIP_EXTENSION "" | |
113 | #endif | |
114 | ||
115 | #ifndef has_dos_drive_prefix | |
116 | #define has_dos_drive_prefix(path) 0 | |
117 | #endif | |
118 | ||
119 | #ifndef is_dir_sep | |
120 | #define is_dir_sep(c) ((c) == '/') | |
121 | #endif | |
122 | ||
123 | #ifdef __GNUC__ | |
124 | #define NORETURN __attribute__((__noreturn__)) | |
125 | #else | |
126 | #define NORETURN | |
127 | #ifndef __attribute__ | |
128 | #define __attribute__(x) | |
129 | #endif | |
130 | #endif | |
131 | ||
132 | /* General helper functions */ | |
133 | extern void usage(const char *err) NORETURN; | |
134 | extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); | |
135 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
136 | extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
137 | ||
138 | extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); | |
139 | ||
140 | extern int prefixcmp(const char *str, const char *prefix); | |
141 | extern time_t tm_to_time_t(const struct tm *tm); | |
142 | ||
143 | static inline const char *skip_prefix(const char *str, const char *prefix) | |
144 | { | |
145 | size_t len = strlen(prefix); | |
146 | return strncmp(str, prefix, len) ? NULL : str + len; | |
147 | } | |
148 | ||
149 | #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) | |
150 | ||
151 | #ifndef PROT_READ | |
152 | #define PROT_READ 1 | |
153 | #define PROT_WRITE 2 | |
154 | #define MAP_PRIVATE 1 | |
155 | #define MAP_FAILED ((void*)-1) | |
156 | #endif | |
157 | ||
158 | #define mmap git_mmap | |
159 | #define munmap git_munmap | |
160 | extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
161 | extern int git_munmap(void *start, size_t length); | |
162 | ||
163 | #else /* NO_MMAP || USE_WIN32_MMAP */ | |
164 | ||
165 | #include <sys/mman.h> | |
166 | ||
167 | #endif /* NO_MMAP || USE_WIN32_MMAP */ | |
168 | ||
169 | #ifdef NO_MMAP | |
170 | ||
171 | /* This value must be multiple of (pagesize * 2) */ | |
172 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) | |
173 | ||
174 | #else /* NO_MMAP */ | |
175 | ||
176 | /* This value must be multiple of (pagesize * 2) */ | |
177 | #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ | |
178 | (sizeof(void*) >= 8 \ | |
179 | ? 1 * 1024 * 1024 * 1024 \ | |
180 | : 32 * 1024 * 1024) | |
181 | ||
182 | #endif /* NO_MMAP */ | |
183 | ||
184 | #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT | |
185 | #define on_disk_bytes(st) ((st).st_size) | |
186 | #else | |
187 | #define on_disk_bytes(st) ((st).st_blocks * 512) | |
188 | #endif | |
189 | ||
190 | #define DEFAULT_PACKED_GIT_LIMIT \ | |
191 | ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) | |
192 | ||
193 | #ifdef NO_PREAD | |
194 | #define pread git_pread | |
195 | extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); | |
196 | #endif | |
197 | /* | |
198 | * Forward decl that will remind us if its twin in cache.h changes. | |
199 | * This function is used in compat/pread.c. But we can't include | |
200 | * cache.h there. | |
201 | */ | |
202 | extern ssize_t read_in_full(int fd, void *buf, size_t count); | |
203 | ||
204 | #ifdef NO_SETENV | |
205 | #define setenv gitsetenv | |
206 | extern int gitsetenv(const char *, const char *, int); | |
207 | #endif | |
208 | ||
209 | #ifdef NO_MKDTEMP | |
210 | #define mkdtemp gitmkdtemp | |
211 | extern char *gitmkdtemp(char *); | |
212 | #endif | |
213 | ||
214 | #ifdef NO_UNSETENV | |
215 | #define unsetenv gitunsetenv | |
216 | extern void gitunsetenv(const char *); | |
217 | #endif | |
218 | ||
219 | #ifdef NO_STRCASESTR | |
220 | #define strcasestr gitstrcasestr | |
221 | extern char *gitstrcasestr(const char *haystack, const char *needle); | |
222 | #endif | |
223 | ||
224 | #ifdef NO_STRLCPY | |
225 | #define strlcpy gitstrlcpy | |
226 | extern size_t gitstrlcpy(char *, const char *, size_t); | |
227 | #endif | |
228 | ||
229 | #ifdef NO_STRTOUMAX | |
230 | #define strtoumax gitstrtoumax | |
231 | extern uintmax_t gitstrtoumax(const char *, char **, int); | |
232 | #endif | |
233 | ||
234 | #ifdef NO_HSTRERROR | |
235 | #define hstrerror githstrerror | |
236 | extern const char *githstrerror(int herror); | |
237 | #endif | |
238 | ||
239 | #ifdef NO_MEMMEM | |
240 | #define memmem gitmemmem | |
241 | void *gitmemmem(const void *haystack, size_t haystacklen, | |
242 | const void *needle, size_t needlelen); | |
243 | #endif | |
244 | ||
245 | #ifdef FREAD_READS_DIRECTORIES | |
246 | #ifdef fopen | |
247 | #undef fopen | |
248 | #endif | |
249 | #define fopen(a,b) git_fopen(a,b) | |
250 | extern FILE *git_fopen(const char*, const char*); | |
251 | #endif | |
252 | ||
253 | #ifdef SNPRINTF_RETURNS_BOGUS | |
254 | #define snprintf git_snprintf | |
255 | extern int git_snprintf(char *str, size_t maxsize, | |
256 | const char *format, ...); | |
257 | #define vsnprintf git_vsnprintf | |
258 | extern int git_vsnprintf(char *str, size_t maxsize, | |
259 | const char *format, va_list ap); | |
260 | #endif | |
261 | ||
262 | #ifdef __GLIBC_PREREQ | |
263 | #if __GLIBC_PREREQ(2, 1) | |
264 | #define HAVE_STRCHRNUL | |
265 | #endif | |
266 | #endif | |
267 | ||
268 | #ifndef HAVE_STRCHRNUL | |
269 | #define strchrnul gitstrchrnul | |
270 | static inline char *gitstrchrnul(const char *s, int c) | |
271 | { | |
272 | while (*s && *s != c) | |
273 | s++; | |
274 | return (char *)s; | |
275 | } | |
276 | #endif | |
277 | ||
6f06ccbc IM |
278 | /* |
279 | * Wrappers: | |
280 | */ | |
281 | extern char *xstrdup(const char *str); | |
282 | extern void *xmalloc(size_t size); | |
283 | extern void *xmemdupz(const void *data, size_t len); | |
284 | extern char *xstrndup(const char *str, size_t len); | |
285 | extern void *xrealloc(void *ptr, size_t size); | |
286 | extern void *xcalloc(size_t nmemb, size_t size); | |
287 | extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); | |
288 | extern ssize_t xread(int fd, void *buf, size_t len); | |
289 | extern ssize_t xwrite(int fd, const void *buf, size_t len); | |
290 | extern int xdup(int fd); | |
291 | extern FILE *xfdopen(int fd, const char *mode); | |
16f762a2 IM |
292 | extern int xmkstemp(char *template); |
293 | ||
07800601 IM |
294 | static inline size_t xsize_t(off_t len) |
295 | { | |
296 | return (size_t)len; | |
297 | } | |
298 | ||
299 | static inline int has_extension(const char *filename, const char *ext) | |
300 | { | |
301 | size_t len = strlen(filename); | |
302 | size_t extlen = strlen(ext); | |
303 | return len > extlen && !memcmp(filename + len - extlen, ext, extlen); | |
304 | } | |
305 | ||
306 | /* Sane ctype - no locale, and works with signed chars */ | |
307 | #undef isascii | |
308 | #undef isspace | |
309 | #undef isdigit | |
310 | #undef isalpha | |
311 | #undef isalnum | |
312 | #undef tolower | |
313 | #undef toupper | |
314 | extern unsigned char sane_ctype[256]; | |
a73c7d84 PZ |
315 | #define GIT_SPACE 0x01 |
316 | #define GIT_DIGIT 0x02 | |
317 | #define GIT_ALPHA 0x04 | |
318 | #define GIT_GLOB_SPECIAL 0x08 | |
319 | #define GIT_REGEX_SPECIAL 0x10 | |
320 | #define GIT_PRINT_EXTRA 0x20 | |
321 | #define GIT_PRINT 0x3E | |
07800601 IM |
322 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) |
323 | #define isascii(x) (((x) & ~0x7f) == 0) | |
324 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
325 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
326 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
327 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
a73c7d84 | 328 | #define isprint(x) sane_istest(x,GIT_PRINT) |
07800601 IM |
329 | #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) |
330 | #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) | |
331 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
332 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
333 | ||
334 | static inline int sane_case(int x, int high) | |
335 | { | |
336 | if (sane_istest(x, GIT_ALPHA)) | |
337 | x = (x & ~0x20) | high; | |
338 | return x; | |
339 | } | |
340 | ||
341 | static inline int strtoul_ui(char const *s, int base, unsigned int *result) | |
342 | { | |
343 | unsigned long ul; | |
344 | char *p; | |
345 | ||
346 | errno = 0; | |
347 | ul = strtoul(s, &p, base); | |
348 | if (errno || *p || p == s || (unsigned int) ul != ul) | |
349 | return -1; | |
350 | *result = ul; | |
351 | return 0; | |
352 | } | |
353 | ||
354 | static inline int strtol_i(char const *s, int base, int *result) | |
355 | { | |
356 | long ul; | |
357 | char *p; | |
358 | ||
359 | errno = 0; | |
360 | ul = strtol(s, &p, base); | |
361 | if (errno || *p || p == s || (int) ul != ul) | |
362 | return -1; | |
363 | *result = ul; | |
364 | return 0; | |
365 | } | |
366 | ||
367 | #ifdef INTERNAL_QSORT | |
368 | void git_qsort(void *base, size_t nmemb, size_t size, | |
369 | int(*compar)(const void *, const void *)); | |
370 | #define qsort git_qsort | |
371 | #endif | |
372 | ||
373 | #ifndef DIR_HAS_BSD_GROUP_SEMANTICS | |
374 | # define FORCE_DIR_SET_GID S_ISGID | |
375 | #else | |
376 | # define FORCE_DIR_SET_GID 0 | |
377 | #endif | |
378 | ||
379 | #ifdef NO_NSEC | |
380 | #undef USE_NSEC | |
381 | #define ST_CTIME_NSEC(st) 0 | |
382 | #define ST_MTIME_NSEC(st) 0 | |
383 | #else | |
384 | #ifdef USE_ST_TIMESPEC | |
385 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec)) | |
386 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec)) | |
387 | #else | |
388 | #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec)) | |
389 | #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec)) | |
390 | #endif | |
391 | #endif | |
392 | ||
393 | #endif |