Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Newer
Older
100644 403 lines (345 sloc) 9.06 kB
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
3
b97e911 @tali Support for large files on 32bit systems.
tali authored
4 #define _FILE_OFFSET_BITS 64
5
8f1d2e6 [PATCH] Compilation: zero-length array declaration.
Junio C Hamano authored
6 #ifndef FLEX_ARRAY
7 #if defined(__GNUC__) && (__GNUC__ < 3)
8 #define FLEX_ARRAY 0
9 #else
10 #define FLEX_ARRAY /* empty */
11 #endif
12 #endif
13
b4f2a6a Use #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
Junio C Hamano authored
14 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
15
8723f21 make overflow test on delta base offset work regardless of variable size
Nicolas Pitre authored
16 #ifdef __GNUC__
17 #define TYPEOF(x) (__typeof__(x))
18 #else
19 #define TYPEOF(x)
20 #endif
21
22 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
23
cf606e3 @awhitcroft git name-rev writes beyond the end of malloc() with large generations
awhitcroft authored
24 /* Approximation of the length of the decimal representation of this type. */
25 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
26
95ca1c6 Really fix headers for __FreeBSD__
Junio C Hamano authored
27 #if !defined(__APPLE__) && !defined(__FreeBSD__)
8502357 simplify inclusion of system header files.
Junio C Hamano authored
28 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
29 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
c902c9a Fix system header problems on Mac OS X
Terje Sten Bjerkseth authored
30 #endif
fb95220 Set _ALL_SOURCE for AIX, but avoid its struct list.
Jason Riedy authored
31 #define _ALL_SOURCE 1
32 #define _GNU_SOURCE 1
33 #define _BSD_SOURCE 1
8502357 simplify inclusion of system header files.
Junio C Hamano authored
34
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
35 #include <unistd.h>
36 #include <stdio.h>
37 #include <sys/stat.h>
38 #include <fcntl.h>
39 #include <stddef.h>
40 #include <stdlib.h>
41 #include <stdarg.h>
42 #include <string.h>
43 #include <errno.h>
44 #include <limits.h>
45 #include <sys/param.h>
46 #include <sys/types.h>
47 #include <dirent.h>
8502357 simplify inclusion of system header files.
Junio C Hamano authored
48 #include <sys/time.h>
49 #include <time.h>
50 #include <signal.h>
51 #include <sys/wait.h>
52 #include <fnmatch.h>
53 #include <sys/poll.h>
54 #include <sys/socket.h>
55 #include <assert.h>
56 #include <regex.h>
57 #include <netinet/in.h>
58 #include <netinet/tcp.h>
59 #include <arpa/inet.h>
60 #include <netdb.h>
61 #include <pwd.h>
007e2ba Use inttypes.h rather than stdint.h.
Jason Riedy authored
62 #include <inttypes.h>
41b2001 Fix an "implicit function definition" warning.
Ramsay Jones authored
63 #if defined(__CYGWIN__)
64 #undef _XOPEN_SOURCE
65 #include <grp.h>
66 #define _XOPEN_SOURCE 600
67 #else
fb95220 Set _ALL_SOURCE for AIX, but avoid its struct list.
Jason Riedy authored
68 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
8502357 simplify inclusion of system header files.
Junio C Hamano authored
69 #include <grp.h>
fb95220 Set _ALL_SOURCE for AIX, but avoid its struct list.
Jason Riedy authored
70 #define _ALL_SOURCE 1
41b2001 Fix an "implicit function definition" warning.
Ramsay Jones authored
71 #endif
8502357 simplify inclusion of system header files.
Junio C Hamano authored
72
73 #ifndef NO_ICONV
74 #include <iconv.h>
75 #endif
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
76
d0c2449 Define fallback PATH_MAX on systems that do not define one in <limits.h>
Junio C Hamano authored
77 /* On most systems <limits.h> would have given us this, but
78 * not on some systems (e.g. GNU/Hurd).
79 */
80 #ifndef PATH_MAX
81 #define PATH_MAX 4096
82 #endif
83
c4001d9 @spearce Use off_t when we really mean a file offset.
spearce authored
84 #ifndef PRIuMAX
85 #define PRIuMAX "llu"
86 #endif
87
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
88 #ifdef __GNUC__
89 #define NORETURN __attribute__((__noreturn__))
90 #else
91 #define NORETURN
92 #ifndef __attribute__
93 #define __attribute__(x)
94 #endif
95 #endif
96
97 /* General helper functions */
98 extern void usage(const char *err) NORETURN;
99 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
100 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d @tytso Rename warn() to warning() to fix symbol conflicts on BSD and Mac OS
tytso authored
101 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
102
39a3f5e Customizable error handlers
Petr Baudis authored
103 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
104 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
105 extern void set_error_routine(void (*routine)(const char *err, va_list params));
fa39b6b @spearce Introduce a global level warn() function.
spearce authored
106 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
39a3f5e Customizable error handlers
Petr Baudis authored
107
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
108 #ifdef NO_MMAP
109
110 #ifndef PROT_READ
111 #define PROT_READ 1
112 #define PROT_WRITE 2
113 #define MAP_PRIVATE 1
114 #define MAP_FAILED ((void*)-1)
115 #endif
116
d677912 @spearce Rename gitfakemmap to git_mmap.
spearce authored
117 #define mmap git_mmap
118 #define munmap git_munmap
119 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
120 extern int git_munmap(void *start, size_t length);
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
121
5faaf24 Make sure packedgitwindowsize is multiple of (pagesize * 2)
Junio C Hamano authored
122 /* This value must be multiple of (pagesize * 2) */
8c82534 @spearce Default core.packdGitWindowSize to 1 MiB if NO_MMAP.
spearce authored
123 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
124
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
125 #else /* NO_MMAP */
126
127 #include <sys/mman.h>
5faaf24 Make sure packedgitwindowsize is multiple of (pagesize * 2)
Junio C Hamano authored
128
129 /* This value must be multiple of (pagesize * 2) */
22bac0e @spearce Increase packedGit{Limit,WindowSize} on 64 bit systems.
spearce authored
130 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
131 (sizeof(void*) >= 8 \
132 ? 1 * 1024 * 1024 * 1024 \
133 : 32 * 1024 * 1024)
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
134
135 #endif /* NO_MMAP */
136
22bac0e @spearce Increase packedGit{Limit,WindowSize} on 64 bit systems.
spearce authored
137 #define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4 Spell default packedgitlimit slightly differently
Junio C Hamano authored
138 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534 @spearce Default core.packdGitWindowSize to 1 MiB if NO_MMAP.
spearce authored
139
6900679 Replacing the system call pread() with lseek()/xread()/lseek() sequence.
Stefan-W. Hahn authored
140 #ifdef NO_PREAD
141 #define pread git_pread
142 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
143 #endif
144
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
145 #ifdef NO_SETENV
146 #define setenv gitsetenv
147 extern int gitsetenv(const char *, const char *, int);
148 #endif
149
ca5bb5d @spearce Define compat version of mkdtemp for systems lacking it
spearce authored
150 #ifdef NO_MKDTEMP
151 #define mkdtemp gitmkdtemp
152 extern char *gitmkdtemp(char *);
153 #endif
154
731043f Add compat/unsetenv.c .
Jason Riedy authored
155 #ifdef NO_UNSETENV
156 #define unsetenv gitunsetenv
157 extern void gitunsetenv(const char *);
158 #endif
159
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
160 #ifdef NO_STRCASESTR
161 #define strcasestr gitstrcasestr
162 extern char *gitstrcasestr(const char *haystack, const char *needle);
163 #endif
164
817151e Rename safe_strncpy() to strlcpy().
Peter Eriksen authored
165 #ifdef NO_STRLCPY
166 #define strlcpy gitstrlcpy
167 extern size_t gitstrlcpy(char *, const char *, size_t);
168 #endif
169
bc6b4f5 Add a compat/strtoumax.c for Solaris 8.
Jason Riedy authored
170 #ifdef NO_STRTOUMAX
171 #define strtoumax gitstrtoumax
172 extern uintmax_t gitstrtoumax(const char *, char **, int);
173 #endif
174
fa0c87c @raalkml Add a local implementation of hstrerror for the system which do not h…
raalkml authored
175 #ifdef NO_HSTRERROR
176 #define hstrerror githstrerror
177 extern const char *githstrerror(int herror);
178 #endif
179
b21b9f1 add memmem()
René Scharfe authored
180 #ifdef NO_MEMMEM
181 #define memmem gitmemmem
182 void *gitmemmem(const void *haystack, size_t haystacklen,
183 const void *needle, size_t needlelen);
184 #endif
185
659c69c Add strchrnul()
René Scharfe authored
186 #ifdef NO_STRCHRNUL
187 #define strchrnul gitstrchrnul
188 char *gitstrchrnul(const char *s, int c);
189 #endif
190
d1efefa @spearce Actually handle some-low memory conditions
spearce authored
191 extern void release_pack_memory(size_t, int);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
192
9befac4 @spearce Replace uses of strdup with xstrdup.
spearce authored
193 static inline char* xstrdup(const char *str)
194 {
195 char *ret = strdup(str);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
196 if (!ret) {
d1efefa @spearce Actually handle some-low memory conditions
spearce authored
197 release_pack_memory(strlen(str) + 1, -1);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
198 ret = strdup(str);
199 if (!ret)
200 die("Out of memory, strdup failed");
201 }
9befac4 @spearce Replace uses of strdup with xstrdup.
spearce authored
202 return ret;
203 }
204
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
205 static inline void *xmalloc(size_t size)
206 {
207 void *ret = malloc(size);
4e7a2ec ?alloc: do not return NULL when asked for zero bytes
Junio C Hamano authored
208 if (!ret && !size)
209 ret = malloc(1);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
210 if (!ret) {
d1efefa @spearce Actually handle some-low memory conditions
spearce authored
211 release_pack_memory(size, -1);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
212 ret = malloc(size);
213 if (!ret && !size)
214 ret = malloc(1);
215 if (!ret)
216 die("Out of memory, malloc failed");
217 }
aa5481c debugging: XMALLOC_POISON
Junio C Hamano authored
218 #ifdef XMALLOC_POISON
219 memset(ret, 0xA5, size);
220 #endif
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
221 return ret;
222 }
223
68d3025 @MadCoder Add xmemdupz() that duplicates a block of memory, and NUL terminates it.
MadCoder authored
224 static inline void *xmemdupz(const void *data, size_t len)
5094102 Make xstrndup common
Daniel Barkalow authored
225 {
68d3025 @MadCoder Add xmemdupz() that duplicates a block of memory, and NUL terminates it.
MadCoder authored
226 char *p = xmalloc(len + 1);
227 memcpy(p, data, len);
5094102 Make xstrndup common
Daniel Barkalow authored
228 p[len] = '\0';
229 return p;
230 }
231
68d3025 @MadCoder Add xmemdupz() that duplicates a block of memory, and NUL terminates it.
MadCoder authored
232 static inline char *xstrndup(const char *str, size_t len)
233 {
234 char *p = memchr(str, '\0', len);
235 return xmemdupz(str, p ? p - str : len);
236 }
237
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
238 static inline void *xrealloc(void *ptr, size_t size)
239 {
240 void *ret = realloc(ptr, size);
4e7a2ec ?alloc: do not return NULL when asked for zero bytes
Junio C Hamano authored
241 if (!ret && !size)
242 ret = realloc(ptr, 1);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
243 if (!ret) {
d1efefa @spearce Actually handle some-low memory conditions
spearce authored
244 release_pack_memory(size, -1);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
245 ret = realloc(ptr, size);
246 if (!ret && !size)
247 ret = realloc(ptr, 1);
248 if (!ret)
249 die("Out of memory, realloc failed");
250 }
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
251 return ret;
252 }
253
254 static inline void *xcalloc(size_t nmemb, size_t size)
255 {
256 void *ret = calloc(nmemb, size);
4e7a2ec ?alloc: do not return NULL when asked for zero bytes
Junio C Hamano authored
257 if (!ret && (!nmemb || !size))
258 ret = calloc(1, 1);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
259 if (!ret) {
d1efefa @spearce Actually handle some-low memory conditions
spearce authored
260 release_pack_memory(nmemb * size, -1);
97bfeb3 @spearce Release pack windows before reporting out of memory.
spearce authored
261 ret = calloc(nmemb, size);
262 if (!ret && (!nmemb || !size))
263 ret = calloc(1, 1);
264 if (!ret)
265 die("Out of memory, calloc failed");
266 }
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
267 return ret;
268 }
269
c4712e4 @spearce Replace mmap with xmmap, better handling MAP_FAILED.
spearce authored
270 static inline void *xmmap(void *start, size_t length,
271 int prot, int flags, int fd, off_t offset)
272 {
273 void *ret = mmap(start, length, prot, flags, fd, offset);
274 if (ret == MAP_FAILED) {
9130ac1 Better error messages for corrupt databases
Linus Torvalds authored
275 if (!length)
276 return NULL;
d1efefa @spearce Actually handle some-low memory conditions
spearce authored
277 release_pack_memory(length, fd);
c4712e4 @spearce Replace mmap with xmmap, better handling MAP_FAILED.
spearce authored
278 ret = mmap(start, length, prot, flags, fd, offset);
279 if (ret == MAP_FAILED)
280 die("Out of memory? mmap failed: %s", strerror(errno));
281 }
282 return ret;
283 }
284
1c15afb xread/xwrite: do not worry about EINTR at calling sites.
Junio C Hamano authored
285 static inline ssize_t xread(int fd, void *buf, size_t len)
286 {
287 ssize_t nr;
288 while (1) {
289 nr = read(fd, buf, len);
290 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
291 continue;
292 return nr;
293 }
294 }
295
296 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
297 {
298 ssize_t nr;
299 while (1) {
300 nr = write(fd, buf, len);
301 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
302 continue;
303 return nr;
304 }
305 }
306
f578825 @meyering git-log: detect dup and fdopen failure
meyering authored
307 static inline int xdup(int fd)
308 {
309 int ret = dup(fd);
310 if (ret < 0)
311 die("dup failed: %s", strerror(errno));
312 return ret;
313 }
314
315 static inline FILE *xfdopen(int fd, const char *mode)
316 {
317 FILE *stream = fdopen(fd, mode);
318 if (stream == NULL)
319 die("Out of memory? fdopen failed: %s", strerror(errno));
320 return stream;
321 }
322
f21a47b Introduces xmkstemp()
Luiz Fernando N. Capitulino authored
323 static inline int xmkstemp(char *template)
324 {
325 int fd;
326
327 fd = mkstemp(template);
328 if (fd < 0)
329 die("Unable to create temporary file: %s", strerror(errno));
330 return fd;
331 }
332
dc49cd7 @spearce Cast 64 bit off_t to 32 bit size_t
spearce authored
333 static inline size_t xsize_t(off_t len)
334 {
335 return (size_t)len;
336 }
337
5bb1cda drop length argument of has_extension
Rene Scharfe authored
338 static inline int has_extension(const char *filename, const char *ext)
83a2b84 Add has_extension()
Rene Scharfe authored
339 {
5bb1cda drop length argument of has_extension
Rene Scharfe authored
340 size_t len = strlen(filename);
341 size_t extlen = strlen(ext);
83a2b84 Add has_extension()
Rene Scharfe authored
342 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
343 }
344
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
345 /* Sane ctype - no locale, and works with signed chars */
346 #undef isspace
347 #undef isdigit
348 #undef isalpha
349 #undef isalnum
350 #undef tolower
351 #undef toupper
352 extern unsigned char sane_ctype[256];
353 #define GIT_SPACE 0x01
354 #define GIT_DIGIT 0x02
355 #define GIT_ALPHA 0x04
356 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
357 #define isspace(x) sane_istest(x,GIT_SPACE)
358 #define isdigit(x) sane_istest(x,GIT_DIGIT)
359 #define isalpha(x) sane_istest(x,GIT_ALPHA)
360 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
361 #define tolower(x) sane_case((unsigned char)(x), 0x20)
362 #define toupper(x) sane_case((unsigned char)(x), 0)
363
364 static inline int sane_case(int x, int high)
365 {
366 if (sane_istest(x, GIT_ALPHA))
367 x = (x & ~0x20) | high;
368 return x;
369 }
370
cff0302 Add prefixcmp()
Junio C Hamano authored
371 static inline int prefixcmp(const char *str, const char *prefix)
372 {
373 return strncmp(str, prefix, strlen(prefix));
374 }
375
6aead43 @meyering sscanf/strtoul: parse integers robustly
meyering authored
376 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
377 {
378 unsigned long ul;
379 char *p;
380
381 errno = 0;
382 ul = strtoul(s, &p, base);
383 if (errno || *p || p == s || (unsigned int) ul != ul)
384 return -1;
385 *result = ul;
386 return 0;
387 }
388
7791ecb @gitster revert/cherry-pick: work on merge commits as well
gitster authored
389 static inline int strtol_i(char const *s, int base, int *result)
390 {
391 long ul;
392 char *p;
393
394 errno = 0;
395 ul = strtol(s, &p, base);
396 if (errno || *p || p == s || (int) ul != ul)
397 return -1;
398 *result = ul;
399 return 0;
400 }
401
4050c0d Clean up compatibility definitions.
Junio C Hamano authored
402 #endif
Something went wrong with that request. Please try again.