Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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#define _ALL_SOURCE 1
43#define _GNU_SOURCE 1
44#define _BSD_SOURCE 1
45
46#include <unistd.h>
47#include <stdio.h>
48#include <sys/stat.h>
49#include <sys/statfs.h>
50#include <fcntl.h>
51#include <stddef.h>
52#include <stdlib.h>
53#include <stdarg.h>
54#include <string.h>
55#include <errno.h>
56#include <limits.h>
57#include <sys/param.h>
58#include <sys/types.h>
59#include <dirent.h>
60#include <sys/time.h>
61#include <time.h>
62#include <signal.h>
63#include <fnmatch.h>
64#include <assert.h>
65#include <regex.h>
66#include <utime.h>
67#include <sys/wait.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 <netinet/in.h>
75#include <netinet/tcp.h>
76#include <arpa/inet.h>
77#include <netdb.h>
78#include <pwd.h>
79#include <inttypes.h>
80#include "../../../include/linux/magic.h"
81
82
83#ifndef NO_ICONV
84#include <iconv.h>
85#endif
86
87extern const char *graph_line;
88extern const char *graph_dotted_line;
89
90/* On most systems <limits.h> would have given us this, but
91 * not on some systems (e.g. GNU/Hurd).
92 */
93#ifndef PATH_MAX
94#define PATH_MAX 4096
95#endif
96
97#ifndef PRIuMAX
98#define PRIuMAX "llu"
99#endif
100
101#ifndef PRIu32
102#define PRIu32 "u"
103#endif
104
105#ifndef PRIx32
106#define PRIx32 "x"
107#endif
108
109#ifndef PATH_SEP
110#define PATH_SEP ':'
111#endif
112
113#ifndef STRIP_EXTENSION
114#define STRIP_EXTENSION ""
115#endif
116
117#ifndef has_dos_drive_prefix
118#define has_dos_drive_prefix(path) 0
119#endif
120
121#ifndef is_dir_sep
122#define is_dir_sep(c) ((c) == '/')
123#endif
124
125#ifdef __GNUC__
126#define NORETURN __attribute__((__noreturn__))
127#else
128#define NORETURN
129#ifndef __attribute__
130#define __attribute__(x)
131#endif
132#endif
133
134/* General helper functions */
135extern void usage(const char *err) NORETURN;
136extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
137extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
138extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
139
140#include "../../../include/linux/stringify.h"
141
142#define DIE_IF(cnd) \
143 do { if (cnd) \
144 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
145 __stringify(cnd) "\n"); \
146 } while (0)
147
148
149extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
150
151extern int prefixcmp(const char *str, const char *prefix);
152extern time_t tm_to_time_t(const struct tm *tm);
153
154static inline const char *skip_prefix(const char *str, const char *prefix)
155{
156 size_t len = strlen(prefix);
157 return strncmp(str, prefix, len) ? NULL : str + len;
158}
159
160#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
161
162#ifndef PROT_READ
163#define PROT_READ 1
164#define PROT_WRITE 2
165#define MAP_PRIVATE 1
166#define MAP_FAILED ((void*)-1)
167#endif
168
169#define mmap git_mmap
170#define munmap git_munmap
171extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
172extern int git_munmap(void *start, size_t length);
173
174#else /* NO_MMAP || USE_WIN32_MMAP */
175
176#include <sys/mman.h>
177
178#endif /* NO_MMAP || USE_WIN32_MMAP */
179
180#ifdef NO_MMAP
181
182/* This value must be multiple of (pagesize * 2) */
183#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
184
185#else /* NO_MMAP */
186
187/* This value must be multiple of (pagesize * 2) */
188#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
189 (sizeof(void*) >= 8 \
190 ? 1 * 1024 * 1024 * 1024 \
191 : 32 * 1024 * 1024)
192
193#endif /* NO_MMAP */
194
195#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
196#define on_disk_bytes(st) ((st).st_size)
197#else
198#define on_disk_bytes(st) ((st).st_blocks * 512)
199#endif
200
201#define DEFAULT_PACKED_GIT_LIMIT \
202 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
203
204#ifdef NO_PREAD
205#define pread git_pread
206extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
207#endif
208/*
209 * Forward decl that will remind us if its twin in cache.h changes.
210 * This function is used in compat/pread.c. But we can't include
211 * cache.h there.
212 */
213extern ssize_t read_in_full(int fd, void *buf, size_t count);
214
215#ifdef NO_SETENV
216#define setenv gitsetenv
217extern int gitsetenv(const char *, const char *, int);
218#endif
219
220#ifdef NO_MKDTEMP
221#define mkdtemp gitmkdtemp
222extern char *gitmkdtemp(char *);
223#endif
224
225#ifdef NO_UNSETENV
226#define unsetenv gitunsetenv
227extern void gitunsetenv(const char *);
228#endif
229
230#ifdef NO_STRCASESTR
231#define strcasestr gitstrcasestr
232extern char *gitstrcasestr(const char *haystack, const char *needle);
233#endif
234
235#ifdef NO_STRLCPY
236#define strlcpy gitstrlcpy
237extern size_t gitstrlcpy(char *, const char *, size_t);
238#endif
239
240#ifdef NO_STRTOUMAX
241#define strtoumax gitstrtoumax
242extern uintmax_t gitstrtoumax(const char *, char **, int);
243#endif
244
245#ifdef NO_HSTRERROR
246#define hstrerror githstrerror
247extern const char *githstrerror(int herror);
248#endif
249
250#ifdef NO_MEMMEM
251#define memmem gitmemmem
252void *gitmemmem(const void *haystack, size_t haystacklen,
253 const void *needle, size_t needlelen);
254#endif
255
256#ifdef FREAD_READS_DIRECTORIES
257#ifdef fopen
258#undef fopen
259#endif
260#define fopen(a,b) git_fopen(a,b)
261extern FILE *git_fopen(const char*, const char*);
262#endif
263
264#ifdef SNPRINTF_RETURNS_BOGUS
265#define snprintf git_snprintf
266extern int git_snprintf(char *str, size_t maxsize,
267 const char *format, ...);
268#define vsnprintf git_vsnprintf
269extern int git_vsnprintf(char *str, size_t maxsize,
270 const char *format, va_list ap);
271#endif
272
273#ifdef __GLIBC_PREREQ
274#if __GLIBC_PREREQ(2, 1)
275#define HAVE_STRCHRNUL
276#endif
277#endif
278
279#ifndef HAVE_STRCHRNUL
280#define strchrnul gitstrchrnul
281static inline char *gitstrchrnul(const char *s, int c)
282{
283 while (*s && *s != c)
284 s++;
285 return (char *)s;
286}
287#endif
288
289/*
290 * Wrappers:
291 */
292extern char *xstrdup(const char *str);
293extern void *xmalloc(size_t size) __attribute__((weak));
294extern void *xmemdupz(const void *data, size_t len);
295extern char *xstrndup(const char *str, size_t len);
296extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
297
298static inline void *zalloc(size_t size)
299{
300 return calloc(1, size);
301}
302
303static inline size_t xsize_t(off_t len)
304{
305 return (size_t)len;
306}
307
308static inline int has_extension(const char *filename, const char *ext)
309{
310 size_t len = strlen(filename);
311 size_t extlen = strlen(ext);
312 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
313}
314
315/* Sane ctype - no locale, and works with signed chars */
316#undef isascii
317#undef isspace
318#undef isdigit
319#undef isxdigit
320#undef isalpha
321#undef isprint
322#undef isalnum
323#undef tolower
324#undef toupper
325extern unsigned char sane_ctype[256];
326#define GIT_SPACE 0x01
327#define GIT_DIGIT 0x02
328#define GIT_ALPHA 0x04
329#define GIT_GLOB_SPECIAL 0x08
330#define GIT_REGEX_SPECIAL 0x10
331#define GIT_PRINT_EXTRA 0x20
332#define GIT_PRINT 0x3E
333#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
334#define isascii(x) (((x) & ~0x7f) == 0)
335#define isspace(x) sane_istest(x,GIT_SPACE)
336#define isdigit(x) sane_istest(x,GIT_DIGIT)
337#define isxdigit(x) \
338 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
339#define isalpha(x) sane_istest(x,GIT_ALPHA)
340#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
341#define isprint(x) sane_istest(x,GIT_PRINT)
342#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
343#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
344#define tolower(x) sane_case((unsigned char)(x), 0x20)
345#define toupper(x) sane_case((unsigned char)(x), 0)
346
347static inline int sane_case(int x, int high)
348{
349 if (sane_istest(x, GIT_ALPHA))
350 x = (x & ~0x20) | high;
351 return x;
352}
353
354static inline int strtoul_ui(char const *s, int base, unsigned int *result)
355{
356 unsigned long ul;
357 char *p;
358
359 errno = 0;
360 ul = strtoul(s, &p, base);
361 if (errno || *p || p == s || (unsigned int) ul != ul)
362 return -1;
363 *result = ul;
364 return 0;
365}
366
367static inline int strtol_i(char const *s, int base, int *result)
368{
369 long ul;
370 char *p;
371
372 errno = 0;
373 ul = strtol(s, &p, base);
374 if (errno || *p || p == s || (int) ul != ul)
375 return -1;
376 *result = ul;
377 return 0;
378}
379
380#ifdef INTERNAL_QSORT
381void git_qsort(void *base, size_t nmemb, size_t size,
382 int(*compar)(const void *, const void *));
383#define qsort git_qsort
384#endif
385
386#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
387# define FORCE_DIR_SET_GID S_ISGID
388#else
389# define FORCE_DIR_SET_GID 0
390#endif
391
392#ifdef NO_NSEC
393#undef USE_NSEC
394#define ST_CTIME_NSEC(st) 0
395#define ST_MTIME_NSEC(st) 0
396#else
397#ifdef USE_ST_TIMESPEC
398#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
399#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
400#else
401#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
402#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
403#endif
404#endif
405
406int mkdir_p(char *path, mode_t mode);
407int copyfile(const char *from, const char *to);
408
409#endif