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
9
10#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
11# define FLEX_ARRAY
12#elif defined(__GNUC__)
13# if (__GNUC__ >= 3)
14# define FLEX_ARRAY
15# else
16# define FLEX_ARRAY 0
17# endif
18#endif
19
20
21
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))
38
39
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
87
88
89
90#ifndef PATH_MAX
91#define PATH_MAX 4096
92#endif
93
94#ifndef PRIuMAX
95#define PRIuMAX "llu"
96#endif
97
98#ifndef PRIu32
99#define PRIu32 "u"
100#endif
101
102#ifndef PRIx32
103#define PRIx32 "x"
104#endif
105
106#ifndef PATH_SEP
107#define PATH_SEP ':'
108#endif
109
110#ifndef STRIP_EXTENSION
111#define STRIP_EXTENSION ""
112#endif
113
114#ifndef has_dos_drive_prefix
115#define has_dos_drive_prefix(path) 0
116#endif
117
118#ifndef is_dir_sep
119#define is_dir_sep(c) ((c) == '/')
120#endif
121
122#ifdef __GNUC__
123#define NORETURN __attribute__((__noreturn__))
124#else
125#define NORETURN
126#ifndef __attribute__
127#define __attribute__(x)
128#endif
129#endif
130
131
132extern void usage(const char *err) NORETURN;
133extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
134extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
135extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
136
137extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
138
139extern int prefixcmp(const char *str, const char *prefix);
140extern time_t tm_to_time_t(const struct tm *tm);
141
142static inline const char *skip_prefix(const char *str, const char *prefix)
143{
144 size_t len = strlen(prefix);
145 return strncmp(str, prefix, len) ? NULL : str + len;
146}
147
148#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
149
150#ifndef PROT_READ
151#define PROT_READ 1
152#define PROT_WRITE 2
153#define MAP_PRIVATE 1
154#define MAP_FAILED ((void*)-1)
155#endif
156
157#define mmap git_mmap
158#define munmap git_munmap
159extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
160extern int git_munmap(void *start, size_t length);
161
162#else
163
164#include <sys/mman.h>
165
166#endif
167
168#ifdef NO_MMAP
169
170
171#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
172
173#else
174
175
176#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
177 (sizeof(void*) >= 8 \
178 ? 1 * 1024 * 1024 * 1024 \
179 : 32 * 1024 * 1024)
180
181#endif
182
183#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
184#define on_disk_bytes(st) ((st).st_size)
185#else
186#define on_disk_bytes(st) ((st).st_blocks * 512)
187#endif
188
189#define DEFAULT_PACKED_GIT_LIMIT \
190 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
191
192#ifdef NO_PREAD
193#define pread git_pread
194extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
195#endif
196
197
198
199
200
201extern ssize_t read_in_full(int fd, void *buf, size_t count);
202
203#ifdef NO_SETENV
204#define setenv gitsetenv
205extern int gitsetenv(const char *, const char *, int);
206#endif
207
208#ifdef NO_MKDTEMP
209#define mkdtemp gitmkdtemp
210extern char *gitmkdtemp(char *);
211#endif
212
213#ifdef NO_UNSETENV
214#define unsetenv gitunsetenv
215extern void gitunsetenv(const char *);
216#endif
217
218#ifdef NO_STRCASESTR
219#define strcasestr gitstrcasestr
220extern char *gitstrcasestr(const char *haystack, const char *needle);
221#endif
222
223#ifdef NO_STRLCPY
224#define strlcpy gitstrlcpy
225extern size_t gitstrlcpy(char *, const char *, size_t);
226#endif
227
228#ifdef NO_STRTOUMAX
229#define strtoumax gitstrtoumax
230extern uintmax_t gitstrtoumax(const char *, char **, int);
231#endif
232
233#ifdef NO_HSTRERROR
234#define hstrerror githstrerror
235extern const char *githstrerror(int herror);
236#endif
237
238#ifdef NO_MEMMEM
239#define memmem gitmemmem
240void *gitmemmem(const void *haystack, size_t haystacklen,
241 const void *needle, size_t needlelen);
242#endif
243
244#ifdef FREAD_READS_DIRECTORIES
245#ifdef fopen
246#undef fopen
247#endif
248#define fopen(a,b) git_fopen(a,b)
249extern FILE *git_fopen(const char*, const char*);
250#endif
251
252#ifdef SNPRINTF_RETURNS_BOGUS
253#define snprintf git_snprintf
254extern int git_snprintf(char *str, size_t maxsize,
255 const char *format, ...);
256#define vsnprintf git_vsnprintf
257extern int git_vsnprintf(char *str, size_t maxsize,
258 const char *format, va_list ap);
259#endif
260
261#ifdef __GLIBC_PREREQ
262#if __GLIBC_PREREQ(2, 1)
263#define HAVE_STRCHRNUL
264#endif
265#endif
266
267#ifndef HAVE_STRCHRNUL
268#define strchrnul gitstrchrnul
269static inline char *gitstrchrnul(const char *s, int c)
270{
271 while (*s && *s != c)
272 s++;
273 return (char *)s;
274}
275#endif
276
277
278
279
280extern char *xstrdup(const char *str);
281extern void *xmalloc(size_t size);
282extern void *xmemdupz(const void *data, size_t len);
283extern char *xstrndup(const char *str, size_t len);
284extern void *xrealloc(void *ptr, size_t size);
285extern void *xcalloc(size_t nmemb, size_t size);
286extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
287extern ssize_t xread(int fd, void *buf, size_t len);
288extern ssize_t xwrite(int fd, const void *buf, size_t len);
289extern int xdup(int fd);
290extern FILE *xfdopen(int fd, const char *mode);
291extern int xmkstemp(char *template);
292
293static inline size_t xsize_t(off_t len)
294{
295 return (size_t)len;
296}
297
298static inline int has_extension(const char *filename, const char *ext)
299{
300 size_t len = strlen(filename);
301 size_t extlen = strlen(ext);
302 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
303}
304
305
306#undef isascii
307#undef isspace
308#undef isdigit
309#undef isalpha
310#undef isprint
311#undef isalnum
312#undef tolower
313#undef toupper
314extern unsigned char sane_ctype[256];
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
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)
328#define isprint(x) sane_istest(x,GIT_PRINT)
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
334static 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
341static 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
354static 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
368void 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
394
