t4200: use cut instead of sed
[git/peff.git] / git-compat-util.h
blob73968e02b024f22068eb5500033f7a2f41d31e8f
1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
4 #define _FILE_OFFSET_BITS 64
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
21 * Otherwise, default to safer but a bit wasteful traditional style
23 #ifndef FLEX_ARRAY
24 # define FLEX_ARRAY 1
25 #endif
26 #endif
28 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
30 #ifdef __GNUC__
31 #define TYPEOF(x) (__typeof__(x))
32 #else
33 #define TYPEOF(x)
34 #endif
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 */
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)
42 #if !defined(__APPLE__) && !defined(__FreeBSD__)
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
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 <sys/wait.h>
67 #include <fnmatch.h>
68 #include <sys/poll.h>
69 #include <sys/socket.h>
70 #include <sys/ioctl.h>
71 #ifndef NO_SYS_SELECT_H
72 #include <sys/select.h>
73 #endif
74 #include <assert.h>
75 #include <regex.h>
76 #include <netinet/in.h>
77 #include <netinet/tcp.h>
78 #include <arpa/inet.h>
79 #include <netdb.h>
80 #include <pwd.h>
81 #include <inttypes.h>
82 #if defined(__CYGWIN__)
83 #undef _XOPEN_SOURCE
84 #include <grp.h>
85 #define _XOPEN_SOURCE 600
86 #else
87 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
88 #include <grp.h>
89 #define _ALL_SOURCE 1
90 #endif
92 #ifndef NO_ICONV
93 #include <iconv.h>
94 #endif
96 /* On most systems <limits.h> would have given us this, but
97 * not on some systems (e.g. GNU/Hurd).
99 #ifndef PATH_MAX
100 #define PATH_MAX 4096
101 #endif
103 #ifndef PRIuMAX
104 #define PRIuMAX "llu"
105 #endif
107 #ifdef __GNUC__
108 #define NORETURN __attribute__((__noreturn__))
109 #else
110 #define NORETURN
111 #ifndef __attribute__
112 #define __attribute__(x)
113 #endif
114 #endif
116 /* General helper functions */
117 extern void usage(const char *err) NORETURN;
118 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
119 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
120 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
122 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
123 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
124 extern void set_error_routine(void (*routine)(const char *err, va_list params));
125 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
127 extern int prefixcmp(const char *str, const char *prefix);
129 #ifdef NO_MMAP
131 #ifndef PROT_READ
132 #define PROT_READ 1
133 #define PROT_WRITE 2
134 #define MAP_PRIVATE 1
135 #define MAP_FAILED ((void*)-1)
136 #endif
138 #define mmap git_mmap
139 #define munmap git_munmap
140 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
141 extern int git_munmap(void *start, size_t length);
143 /* This value must be multiple of (pagesize * 2) */
144 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
146 #else /* NO_MMAP */
148 #include <sys/mman.h>
150 /* This value must be multiple of (pagesize * 2) */
151 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
152 (sizeof(void*) >= 8 \
153 ? 1 * 1024 * 1024 * 1024 \
154 : 32 * 1024 * 1024)
156 #endif /* NO_MMAP */
158 #define DEFAULT_PACKED_GIT_LIMIT \
159 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
161 #ifdef NO_PREAD
162 #define pread git_pread
163 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
164 #endif
166 #ifdef NO_SETENV
167 #define setenv gitsetenv
168 extern int gitsetenv(const char *, const char *, int);
169 #endif
171 #ifdef NO_MKDTEMP
172 #define mkdtemp gitmkdtemp
173 extern char *gitmkdtemp(char *);
174 #endif
176 #ifdef NO_UNSETENV
177 #define unsetenv gitunsetenv
178 extern void gitunsetenv(const char *);
179 #endif
181 #ifdef NO_STRCASESTR
182 #define strcasestr gitstrcasestr
183 extern char *gitstrcasestr(const char *haystack, const char *needle);
184 #endif
186 #ifdef NO_STRLCPY
187 #define strlcpy gitstrlcpy
188 extern size_t gitstrlcpy(char *, const char *, size_t);
189 #endif
191 #ifdef NO_STRTOUMAX
192 #define strtoumax gitstrtoumax
193 extern uintmax_t gitstrtoumax(const char *, char **, int);
194 #endif
196 #ifdef NO_HSTRERROR
197 #define hstrerror githstrerror
198 extern const char *githstrerror(int herror);
199 #endif
201 #ifdef NO_MEMMEM
202 #define memmem gitmemmem
203 void *gitmemmem(const void *haystack, size_t haystacklen,
204 const void *needle, size_t needlelen);
205 #endif
207 #ifdef FREAD_READS_DIRECTORIES
208 #define fopen(a,b) git_fopen(a,b)
209 extern FILE *git_fopen(const char*, const char*);
210 #endif
212 #ifdef SNPRINTF_RETURNS_BOGUS
213 #define snprintf git_snprintf
214 extern int git_snprintf(char *str, size_t maxsize,
215 const char *format, ...);
216 #define vsnprintf git_vsnprintf
217 extern int git_vsnprintf(char *str, size_t maxsize,
218 const char *format, va_list ap);
219 #endif
221 #ifdef __GLIBC_PREREQ
222 #if __GLIBC_PREREQ(2, 1)
223 #define HAVE_STRCHRNUL
224 #endif
225 #endif
227 #ifndef HAVE_STRCHRNUL
228 #define strchrnul gitstrchrnul
229 static inline char *gitstrchrnul(const char *s, int c)
231 while (*s && *s != c)
232 s++;
233 return (char *)s;
235 #endif
237 extern void release_pack_memory(size_t, int);
239 static inline char* xstrdup(const char *str)
241 char *ret = strdup(str);
242 if (!ret) {
243 release_pack_memory(strlen(str) + 1, -1);
244 ret = strdup(str);
245 if (!ret)
246 die("Out of memory, strdup failed");
248 return ret;
251 static inline void *xmalloc(size_t size)
253 void *ret = malloc(size);
254 if (!ret && !size)
255 ret = malloc(1);
256 if (!ret) {
257 release_pack_memory(size, -1);
258 ret = malloc(size);
259 if (!ret && !size)
260 ret = malloc(1);
261 if (!ret)
262 die("Out of memory, malloc failed");
264 #ifdef XMALLOC_POISON
265 memset(ret, 0xA5, size);
266 #endif
267 return ret;
270 static inline void *xmemdupz(const void *data, size_t len)
272 char *p = xmalloc(len + 1);
273 memcpy(p, data, len);
274 p[len] = '\0';
275 return p;
278 static inline char *xstrndup(const char *str, size_t len)
280 char *p = memchr(str, '\0', len);
281 return xmemdupz(str, p ? p - str : len);
284 static inline void *xrealloc(void *ptr, size_t size)
286 void *ret = realloc(ptr, size);
287 if (!ret && !size)
288 ret = realloc(ptr, 1);
289 if (!ret) {
290 release_pack_memory(size, -1);
291 ret = realloc(ptr, size);
292 if (!ret && !size)
293 ret = realloc(ptr, 1);
294 if (!ret)
295 die("Out of memory, realloc failed");
297 return ret;
300 static inline void *xcalloc(size_t nmemb, size_t size)
302 void *ret = calloc(nmemb, size);
303 if (!ret && (!nmemb || !size))
304 ret = calloc(1, 1);
305 if (!ret) {
306 release_pack_memory(nmemb * size, -1);
307 ret = calloc(nmemb, size);
308 if (!ret && (!nmemb || !size))
309 ret = calloc(1, 1);
310 if (!ret)
311 die("Out of memory, calloc failed");
313 return ret;
316 static inline void *xmmap(void *start, size_t length,
317 int prot, int flags, int fd, off_t offset)
319 void *ret = mmap(start, length, prot, flags, fd, offset);
320 if (ret == MAP_FAILED) {
321 if (!length)
322 return NULL;
323 release_pack_memory(length, fd);
324 ret = mmap(start, length, prot, flags, fd, offset);
325 if (ret == MAP_FAILED)
326 die("Out of memory? mmap failed: %s", strerror(errno));
328 return ret;
331 static inline ssize_t xread(int fd, void *buf, size_t len)
333 ssize_t nr;
334 while (1) {
335 nr = read(fd, buf, len);
336 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
337 continue;
338 return nr;
342 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
344 ssize_t nr;
345 while (1) {
346 nr = write(fd, buf, len);
347 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
348 continue;
349 return nr;
353 static inline int xdup(int fd)
355 int ret = dup(fd);
356 if (ret < 0)
357 die("dup failed: %s", strerror(errno));
358 return ret;
361 static inline FILE *xfdopen(int fd, const char *mode)
363 FILE *stream = fdopen(fd, mode);
364 if (stream == NULL)
365 die("Out of memory? fdopen failed: %s", strerror(errno));
366 return stream;
369 static inline int xmkstemp(char *template)
371 int fd;
373 fd = mkstemp(template);
374 if (fd < 0)
375 die("Unable to create temporary file: %s", strerror(errno));
376 return fd;
379 static inline size_t xsize_t(off_t len)
381 return (size_t)len;
384 static inline int has_extension(const char *filename, const char *ext)
386 size_t len = strlen(filename);
387 size_t extlen = strlen(ext);
388 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
391 /* Sane ctype - no locale, and works with signed chars */
392 #undef isspace
393 #undef isdigit
394 #undef isalpha
395 #undef isalnum
396 #undef tolower
397 #undef toupper
398 extern unsigned char sane_ctype[256];
399 #define GIT_SPACE 0x01
400 #define GIT_DIGIT 0x02
401 #define GIT_ALPHA 0x04
402 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
403 #define isspace(x) sane_istest(x,GIT_SPACE)
404 #define isdigit(x) sane_istest(x,GIT_DIGIT)
405 #define isalpha(x) sane_istest(x,GIT_ALPHA)
406 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
407 #define tolower(x) sane_case((unsigned char)(x), 0x20)
408 #define toupper(x) sane_case((unsigned char)(x), 0)
410 static inline int sane_case(int x, int high)
412 if (sane_istest(x, GIT_ALPHA))
413 x = (x & ~0x20) | high;
414 return x;
417 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
419 unsigned long ul;
420 char *p;
422 errno = 0;
423 ul = strtoul(s, &p, base);
424 if (errno || *p || p == s || (unsigned int) ul != ul)
425 return -1;
426 *result = ul;
427 return 0;
430 static inline int strtol_i(char const *s, int base, int *result)
432 long ul;
433 char *p;
435 errno = 0;
436 ul = strtol(s, &p, base);
437 if (errno || *p || p == s || (int) ul != ul)
438 return -1;
439 *result = ul;
440 return 0;
443 #ifdef INTERNAL_QSORT
444 void git_qsort(void *base, size_t nmemb, size_t size,
445 int(*compar)(const void *, const void *));
446 #define qsort git_qsort
447 #endif
449 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
450 # define FORCE_DIR_SET_GID S_ISGID
451 #else
452 # define FORCE_DIR_SET_GID 0
453 #endif
455 #endif