1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
4 #define _FILE_OFFSET_BITS 64
8 * See if our compiler is known to support flexible array members.
10 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
11 # define FLEX_ARRAY /* empty */
12 #elif defined(__GNUC__)
14 # define FLEX_ARRAY /* empty */
16 # define FLEX_ARRAY 0 /* older GNU extension */
21 * Otherwise, default to safer but a bit wasteful traditional style
28 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
31 #define TYPEOF(x) (__typeof__(x))
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 */
60 #include <sys/param.h>
61 #include <sys/types.h>
69 #include <sys/socket.h>
70 #include <sys/ioctl.h>
71 #include <sys/select.h>
74 #include <netinet/in.h>
75 #include <netinet/tcp.h>
76 #include <arpa/inet.h>
80 #if defined(__CYGWIN__)
83 #define _XOPEN_SOURCE 600
85 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
94 /* On most systems <limits.h> would have given us this, but
95 * not on some systems (e.g. GNU/Hurd).
102 #define PRIuMAX "llu"
106 #define NORETURN __attribute__((__noreturn__))
109 #ifndef __attribute__
110 #define __attribute__(x)
114 /* General helper functions */
115 extern void usage(const char *err) NORETURN;
116 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
117 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
118 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
120 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
121 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
122 extern void set_error_routine(void (*routine)(const char *err, va_list params));
123 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
125 extern int prefixcmp(const char *str, const char *prefix);
132 #define MAP_PRIVATE 1
133 #define MAP_FAILED ((void*)-1)
136 #define mmap git_mmap
137 #define munmap git_munmap
138 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
139 extern int git_munmap(void *start, size_t length);
141 /* This value must be multiple of (pagesize * 2) */
142 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
146 #include <sys/mman.h>
148 /* This value must be multiple of (pagesize * 2) */
149 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
150 (sizeof(void*) >= 8 \
151 ? 1 * 1024 * 1024 * 1024 \
156 #define DEFAULT_PACKED_GIT_LIMIT \
157 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
160 #define pread git_pread
161 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
165 #define setenv gitsetenv
166 extern int gitsetenv(const char *, const char *, int);
170 #define mkdtemp gitmkdtemp
171 extern char *gitmkdtemp(char *);
175 #define unsetenv gitunsetenv
176 extern void gitunsetenv(const char *);
180 #define strcasestr gitstrcasestr
181 extern char *gitstrcasestr(const char *haystack, const char *needle);
185 #define strlcpy gitstrlcpy
186 extern size_t gitstrlcpy(char *, const char *, size_t);
190 #define strtoumax gitstrtoumax
191 extern uintmax_t gitstrtoumax(const char *, char **, int);
195 #define hstrerror githstrerror
196 extern const char *githstrerror(int herror);
200 #define memmem gitmemmem
201 void *gitmemmem(const void *haystack, size_t haystacklen,
202 const void *needle, size_t needlelen);
205 #ifdef __GLIBC_PREREQ
206 #if __GLIBC_PREREQ(2, 1)
207 #define HAVE_STRCHRNUL
211 #ifndef HAVE_STRCHRNUL
212 #define strchrnul gitstrchrnul
213 static inline char *gitstrchrnul(const char *s, int c)
215 while (*s && *s != c)
221 extern void release_pack_memory(size_t, int);
223 static inline char* xstrdup(const char *str)
225 char *ret = strdup(str);
227 release_pack_memory(strlen(str) + 1, -1);
230 die("Out of memory, strdup failed");
235 static inline void *xmalloc(size_t size)
237 void *ret = malloc(size);
241 release_pack_memory(size, -1);
246 die("Out of memory, malloc failed");
248 #ifdef XMALLOC_POISON
249 memset(ret, 0xA5, size);
254 static inline void *xmemdupz(const void *data, size_t len)
256 char *p = xmalloc(len + 1);
257 memcpy(p, data, len);
262 static inline char *xstrndup(const char *str, size_t len)
264 char *p = memchr(str, '\0', len);
265 return xmemdupz(str, p ? p - str : len);
268 static inline void *xrealloc(void *ptr, size_t size)
270 void *ret = realloc(ptr, size);
272 ret = realloc(ptr, 1);
274 release_pack_memory(size, -1);
275 ret = realloc(ptr, size);
277 ret = realloc(ptr, 1);
279 die("Out of memory, realloc failed");
284 static inline void *xcalloc(size_t nmemb, size_t size)
286 void *ret = calloc(nmemb, size);
287 if (!ret && (!nmemb || !size))
290 release_pack_memory(nmemb * size, -1);
291 ret = calloc(nmemb, size);
292 if (!ret && (!nmemb || !size))
295 die("Out of memory, calloc failed");
300 static inline void *xmmap(void *start, size_t length,
301 int prot, int flags, int fd, off_t offset)
303 void *ret = mmap(start, length, prot, flags, fd, offset);
304 if (ret == MAP_FAILED) {
307 release_pack_memory(length, fd);
308 ret = mmap(start, length, prot, flags, fd, offset);
309 if (ret == MAP_FAILED)
310 die("Out of memory? mmap failed: %s", strerror(errno));
315 static inline ssize_t xread(int fd, void *buf, size_t len)
319 nr = read(fd, buf, len);
320 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
326 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
330 nr = write(fd, buf, len);
331 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
337 static inline int xdup(int fd)
341 die("dup failed: %s", strerror(errno));
345 static inline FILE *xfdopen(int fd, const char *mode)
347 FILE *stream = fdopen(fd, mode);
349 die("Out of memory? fdopen failed: %s", strerror(errno));
353 static inline int xmkstemp(char *template)
357 fd = mkstemp(template);
359 die("Unable to create temporary file: %s", strerror(errno));
363 static inline size_t xsize_t(off_t len)
368 static inline int has_extension(const char *filename, const char *ext)
370 size_t len = strlen(filename);
371 size_t extlen = strlen(ext);
372 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
375 /* Sane ctype - no locale, and works with signed chars */
382 extern unsigned char sane_ctype[256];
383 #define GIT_SPACE 0x01
384 #define GIT_DIGIT 0x02
385 #define GIT_ALPHA 0x04
386 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
387 #define isspace(x) sane_istest(x,GIT_SPACE)
388 #define isdigit(x) sane_istest(x,GIT_DIGIT)
389 #define isalpha(x) sane_istest(x,GIT_ALPHA)
390 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
391 #define tolower(x) sane_case((unsigned char)(x), 0x20)
392 #define toupper(x) sane_case((unsigned char)(x), 0)
394 static inline int sane_case(int x, int high)
396 if (sane_istest(x, GIT_ALPHA))
397 x = (x & ~0x20) | high;
401 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
407 ul = strtoul(s, &p, base);
408 if (errno || *p || p == s || (unsigned int) ul != ul)
414 static inline int strtol_i(char const *s, int base, int *result)
420 ul = strtol(s, &p, base);
421 if (errno || *p || p == s || (int) ul != ul)