1#ifndef GIT_COMPAT_UTIL_H
2#define GIT_COMPAT_UTIL_H
3
4#define _FILE_OFFSET_BITS 64
5
6
7/* Derived from Linux "Features Test Macro" header
8 * Convenience macros to test the versions of gcc (or
9 * a compatible compiler).
10 * Use them like this:
11 * #if GIT_GNUC_PREREQ (2,8)
12 * ... code requiring gcc 2.8 or later ...
13 * #endif
14*/
15#if defined(__GNUC__) && defined(__GNUC_MINOR__)
16# define GIT_GNUC_PREREQ(maj, min) \
17 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
18#else
19 #define GIT_GNUC_PREREQ(maj, min) 0
20#endif
21
22
23#ifndef FLEX_ARRAY
24/*
25 * See if our compiler is known to support flexible array members.
26 */
27#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
28# define FLEX_ARRAY /* empty */
29#elif defined(__GNUC__)
30# if (__GNUC__ >= 3)
31# define FLEX_ARRAY /* empty */
32# else
33# define FLEX_ARRAY 0 /* older GNU extension */
34# endif
35#endif
36
37/*
38 * Otherwise, default to safer but a bit wasteful traditional style
39 */
40#ifndef FLEX_ARRAY
41# define FLEX_ARRAY 1
42#endif
43#endif
44
45
46/*
47 * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression.
48 * @cond: the compile-time condition which must be true.
49 *
50 * Your compile will fail if the condition isn't true, or can't be evaluated
51 * by the compiler. This can be used in an expression: its value is "0".
52 *
53 * Example:
54 * #define foo_to_char(foo) \
55 * ((char *)(foo) \
56 * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0))
57 */
58#define BUILD_ASSERT_OR_ZERO(cond) \
59 (sizeof(char [1 - 2*!(cond)]) - 1)
60
61#if GIT_GNUC_PREREQ(3, 1)
62 /* &arr[0] degrades to a pointer: a different type from an array */
63# define BARF_UNLESS_AN_ARRAY(arr) \
64 BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \
65 __typeof__(&(arr)[0])))
66#else
67# define BARF_UNLESS_AN_ARRAY(arr) 0
68#endif
69/*
70 * ARRAY_SIZE - get the number of elements in a visible array
71 * <at> x: the array whose size you want.
72 *
73 * This does not work on pointers, or arrays declared as [], or
74 * function parameters. With correct compiler support, such usage
75 * will cause a build error (see the build_assert_or_zero macro).
76 */
77#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x))
78
79#define bitsizeof(x) (CHAR_BIT * sizeof(x))
80
81#define maximum_signed_value_of_type(a) \
82 (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
83
84#define maximum_unsigned_value_of_type(a) \
85 (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
86
87/*
88 * Signed integer overflow is undefined in C, so here's a helper macro
89 * to detect if the sum of two integers will overflow.
90 *
91 * Requires: a >= 0, typeof(a) equals typeof(b)
92 */
93#define signed_add_overflows(a, b) \
94 ((b) > maximum_signed_value_of_type(a) - (a))
95
96#define unsigned_add_overflows(a, b) \
97 ((b) > maximum_unsigned_value_of_type(a) - (a))
98
99#ifdef __GNUC__
100#define TYPEOF(x) (__typeof__(x))
101#else
102#define TYPEOF(x)
103#endif
104
105#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
106#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
107
108#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
109
110/* Approximation of the length of the decimal representation of this type. */
111#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
112
113#if defined(__sun__)
114 /*
115 * On Solaris, when _XOPEN_EXTENDED is set, its header file
116 * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
117 * setting to say we are XPG5 or XPG6. Also on Solaris,
118 * XPG6 programs must be compiled with a c99 compiler, while
119 * non XPG6 programs must be compiled with a pre-c99 compiler.
120 */
121# if __STDC_VERSION__ - 0 >= 199901L
122# define _XOPEN_SOURCE 600
123# else
124# define _XOPEN_SOURCE 500
125# endif
126#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
127 !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
128 !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__)
129#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
130#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
131#endif
132#define _ALL_SOURCE 1
133#define _GNU_SOURCE 1
134#define _BSD_SOURCE 1
135#define _DEFAULT_SOURCE 1
136#define _NETBSD_SOURCE 1
137#define _SGI_SOURCE 1
138
139#if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
140# if defined (_MSC_VER) && !defined(_WIN32_WINNT)
141# define _WIN32_WINNT 0x0502
142# endif
143#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
144#include <winsock2.h>
145#include <windows.h>
146#define GIT_WINDOWS_NATIVE
147#endif
148
149#include <unistd.h>
150#include <stdio.h>
151#include <sys/stat.h>
152#include <fcntl.h>
153#include <stddef.h>
154#include <stdlib.h>
155#include <stdarg.h>
156#include <string.h>
157#ifdef HAVE_STRINGS_H
158#include <strings.h> /* for strcasecmp() */
159#endif
160#include <errno.h>
161#include <limits.h>
162#ifdef NEEDS_SYS_PARAM_H
163#include <sys/param.h>
164#endif
165#include <sys/types.h>
166#include <dirent.h>
167#include <sys/time.h>
168#include <time.h>
169#include <signal.h>
170#include <assert.h>
171#include <regex.h>
172#include <utime.h>
173#include <syslog.h>
174#ifndef NO_SYS_POLL_H
175#include <sys/poll.h>
176#else
177#include <poll.h>
178#endif
179
180#if defined(__MINGW32__)
181/* pull in Windows compatibility stuff */
182#include "compat/mingw.h"
183#elif defined(_MSC_VER)
184#include "compat/msvc.h"
185#else
186#include <sys/wait.h>
187#include <sys/resource.h>
188#include <sys/socket.h>
189#include <sys/ioctl.h>
190#include <termios.h>
191#ifndef NO_SYS_SELECT_H
192#include <sys/select.h>
193#endif
194#include <netinet/in.h>
195#include <netinet/tcp.h>
196#include <arpa/inet.h>
197#include <netdb.h>
198#include <pwd.h>
199#include <sys/un.h>
200#ifndef NO_INTTYPES_H
201#include <inttypes.h>
202#else
203#include <stdint.h>
204#endif
205#ifdef NO_INTPTR_T
206/*
207 * On I16LP32, ILP32 and LP64 "long" is the save bet, however
208 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
209 * while on IP16 and IP16L32 it is "int" (resp. "short")
210 * Size needs to match (or exceed) 'sizeof(void *)'.
211 * We can't take "long long" here as not everybody has it.
212 */
213typedef long intptr_t;
214typedef unsigned long uintptr_t;
215#endif
216#if defined(__CYGWIN__)
217#undef _XOPEN_SOURCE
218#include <grp.h>
219#define _XOPEN_SOURCE 600
220#else
221#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
222#include <grp.h>
223#define _ALL_SOURCE 1
224#endif
225#endif
226
227/* used on Mac OS X */
228#ifdef PRECOMPOSE_UNICODE
229#include "compat/precompose_utf8.h"
230#else
231#define precompose_str(in,i_nfd2nfc)
232#define precompose_argv(c,v)
233#define probe_utf8_pathname_composition(a,b)
234#endif
235
236#ifdef MKDIR_WO_TRAILING_SLASH
237#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
238extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
239#endif
240
241#ifdef NO_STRUCT_ITIMERVAL
242struct itimerval {
243 struct timeval it_interval;
244 struct timeval it_value;
245};
246#endif
247
248#ifdef NO_SETITIMER
249#define setitimer(which,value,ovalue)
250#endif
251
252#ifndef NO_LIBGEN_H
253#include <libgen.h>
254#else
255#define basename gitbasename
256extern char *gitbasename(char *);
257#endif
258
259#ifndef NO_ICONV
260#include <iconv.h>
261#endif
262
263#ifndef NO_OPENSSL
264#include <openssl/ssl.h>
265#include <openssl/err.h>
266#endif
267
268/* On most systems <netdb.h> would have given us this, but
269 * not on some systems (e.g. z/OS).
270 */
271#ifndef NI_MAXHOST
272#define NI_MAXHOST 1025
273#endif
274
275#ifndef NI_MAXSERV
276#define NI_MAXSERV 32
277#endif
278
279/* On most systems <limits.h> would have given us this, but
280 * not on some systems (e.g. GNU/Hurd).
281 */
282#ifndef PATH_MAX
283#define PATH_MAX 4096
284#endif
285
286#ifndef PRIuMAX
287#define PRIuMAX "llu"
288#endif
289
290#ifndef PRIu32
291#define PRIu32 "u"
292#endif
293
294#ifndef PRIx32
295#define PRIx32 "x"
296#endif
297
298#ifndef PRIo32
299#define PRIo32 "o"
300#endif
301
302#ifndef PATH_SEP
303#define PATH_SEP ':'
304#endif
305
306#ifdef HAVE_PATHS_H
307#include <paths.h>
308#endif
309#ifndef _PATH_DEFPATH
310#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
311#endif
312
313#ifndef STRIP_EXTENSION
314#define STRIP_EXTENSION ""
315#endif
316
317#ifndef has_dos_drive_prefix
318static inline int git_has_dos_drive_prefix(const char *path)
319{
320 return 0;
321}
322#define has_dos_drive_prefix git_has_dos_drive_prefix
323#endif
324
325#ifndef is_dir_sep
326static inline int git_is_dir_sep(int c)
327{
328 return c == '/';
329}
330#define is_dir_sep git_is_dir_sep
331#endif
332
333#ifndef offset_1st_component
334static inline int git_offset_1st_component(const char *path)
335{
336 return is_dir_sep(path[0]);
337}
338#define offset_1st_component git_offset_1st_component
339#endif
340
341#ifndef find_last_dir_sep
342static inline char *git_find_last_dir_sep(const char *path)
343{
344 return strrchr(path, '/');
345}
346#define find_last_dir_sep git_find_last_dir_sep
347#endif
348
349#if defined(__HP_cc) && (__HP_cc >= 61000)
350#define NORETURN __attribute__((noreturn))
351#define NORETURN_PTR
352#elif defined(__GNUC__) && !defined(NO_NORETURN)
353#define NORETURN __attribute__((__noreturn__))
354#define NORETURN_PTR __attribute__((__noreturn__))
355#elif defined(_MSC_VER)
356#define NORETURN __declspec(noreturn)
357#define NORETURN_PTR
358#else
359#define NORETURN
360#define NORETURN_PTR
361#ifndef __GNUC__
362#ifndef __attribute__
363#define __attribute__(x)
364#endif
365#endif
366#endif
367
368/* The sentinel attribute is valid from gcc version 4.0 */
369#if defined(__GNUC__) && (__GNUC__ >= 4)
370#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
371#else
372#define LAST_ARG_MUST_BE_NULL
373#endif
374
375#include "compat/bswap.h"
376
377#include "wildmatch.h"
378
379struct strbuf;
380
381/* General helper functions */
382extern void vreportf(const char *prefix, const char *err, va_list params);
383extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
384extern NORETURN void usage(const char *err);
385extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
386extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
387extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
388extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
389extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
390
391#ifndef NO_OPENSSL
392#ifdef APPLE_COMMON_CRYPTO
393#include "compat/apple-common-crypto.h"
394#else
395#include <openssl/evp.h>
396#include <openssl/hmac.h>
397#endif /* APPLE_COMMON_CRYPTO */
398#include <openssl/x509v3.h>
399#endif /* NO_OPENSSL */
400
401/*
402 * Let callers be aware of the constant return value; this can help
403 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
404 * because some compilers may not support variadic macros. Since we're only
405 * trying to help gcc, anyway, it's OK; other compilers will fall back to
406 * using the function as usual.
407 */
408#if defined(__GNUC__)
409static inline int const_error(void)
410{
411 return -1;
412}
413#define error(...) (error(__VA_ARGS__), const_error())
414#endif
415
416extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
417extern void set_error_routine(void (*routine)(const char *err, va_list params));
418extern void set_die_is_recursing_routine(int (*routine)(void));
419
420extern int starts_with(const char *str, const char *prefix);
421
422/*
423 * If the string "str" begins with the string found in "prefix", return 1.
424 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
425 * the string right after the prefix).
426 *
427 * Otherwise, return 0 and leave "out" untouched.
428 *
429 * Examples:
430 *
431 * [extract branch name, fail if not a branch]
432 * if (!skip_prefix(ref, "refs/heads/", &branch)
433 * return -1;
434 *
435 * [skip prefix if present, otherwise use whole string]
436 * skip_prefix(name, "refs/heads/", &name);
437 */
438static inline int skip_prefix(const char *str, const char *prefix,
439 const char **out)
440{
441 do {
442 if (!*prefix) {
443 *out = str;
444 return 1;
445 }
446 } while (*str++ == *prefix++);
447 return 0;
448}
449
450/*
451 * If buf ends with suffix, return 1 and subtract the length of the suffix
452 * from *len. Otherwise, return 0 and leave *len untouched.
453 */
454static inline int strip_suffix_mem(const char *buf, size_t *len,
455 const char *suffix)
456{
457 size_t suflen = strlen(suffix);
458 if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
459 return 0;
460 *len -= suflen;
461 return 1;
462}
463
464/*
465 * If str ends with suffix, return 1 and set *len to the size of the string
466 * without the suffix. Otherwise, return 0 and set *len to the size of the
467 * string.
468 *
469 * Note that we do _not_ NUL-terminate str to the new length.
470 */
471static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
472{
473 *len = strlen(str);
474 return strip_suffix_mem(str, len, suffix);
475}
476
477static inline int ends_with(const char *str, const char *suffix)
478{
479 size_t len;
480 return strip_suffix(str, suffix, &len);
481}
482
483#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
484
485#ifndef PROT_READ
486#define PROT_READ 1
487#define PROT_WRITE 2
488#define MAP_PRIVATE 1
489#endif
490
491#define mmap git_mmap
492#define munmap git_munmap
493extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
494extern int git_munmap(void *start, size_t length);
495
496#else /* NO_MMAP || USE_WIN32_MMAP */
497
498#include <sys/mman.h>
499
500#endif /* NO_MMAP || USE_WIN32_MMAP */
501
502#ifdef NO_MMAP
503
504/* This value must be multiple of (pagesize * 2) */
505#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
506
507#else /* NO_MMAP */
508
509/* This value must be multiple of (pagesize * 2) */
510#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
511 (sizeof(void*) >= 8 \
512 ? 1 * 1024 * 1024 * 1024 \
513 : 32 * 1024 * 1024)
514
515#endif /* NO_MMAP */
516
517#ifndef MAP_FAILED
518#define MAP_FAILED ((void *)-1)
519#endif
520
521#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
522#define on_disk_bytes(st) ((st).st_size)
523#else
524#define on_disk_bytes(st) ((st).st_blocks * 512)
525#endif
526
527#define DEFAULT_PACKED_GIT_LIMIT \
528 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
529
530#ifdef NO_PREAD
531#define pread git_pread
532extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
533#endif
534/*
535 * Forward decl that will remind us if its twin in cache.h changes.
536 * This function is used in compat/pread.c. But we can't include
537 * cache.h there.
538 */
539extern ssize_t read_in_full(int fd, void *buf, size_t count);
540
541#ifdef NO_SETENV
542#define setenv gitsetenv
543extern int gitsetenv(const char *, const char *, int);
544#endif
545
546#ifdef NO_MKDTEMP
547#define mkdtemp gitmkdtemp
548extern char *gitmkdtemp(char *);
549#endif
550
551#ifdef NO_MKSTEMPS
552#define mkstemps gitmkstemps
553extern int gitmkstemps(char *, int);
554#endif
555
556#ifdef NO_UNSETENV
557#define unsetenv gitunsetenv
558extern void gitunsetenv(const char *);
559#endif
560
561#ifdef NO_STRCASESTR
562#define strcasestr gitstrcasestr
563extern char *gitstrcasestr(const char *haystack, const char *needle);
564#endif
565
566#ifdef NO_STRLCPY
567#define strlcpy gitstrlcpy
568extern size_t gitstrlcpy(char *, const char *, size_t);
569#endif
570
571#ifdef NO_STRTOUMAX
572#define strtoumax gitstrtoumax
573extern uintmax_t gitstrtoumax(const char *, char **, int);
574#define strtoimax gitstrtoimax
575extern intmax_t gitstrtoimax(const char *, char **, int);
576#endif
577
578#ifdef NO_HSTRERROR
579#define hstrerror githstrerror
580extern const char *githstrerror(int herror);
581#endif
582
583#ifdef NO_MEMMEM
584#define memmem gitmemmem
585void *gitmemmem(const void *haystack, size_t haystacklen,
586 const void *needle, size_t needlelen);
587#endif
588
589#ifdef NO_GETPAGESIZE
590#define getpagesize() sysconf(_SC_PAGESIZE)
591#endif
592
593#ifdef FREAD_READS_DIRECTORIES
594#ifdef fopen
595#undef fopen
596#endif
597#define fopen(a,b) git_fopen(a,b)
598extern FILE *git_fopen(const char*, const char*);
599#endif
600
601#ifdef SNPRINTF_RETURNS_BOGUS
602#ifdef snprintf
603#undef snprintf
604#endif
605#define snprintf git_snprintf
606extern int git_snprintf(char *str, size_t maxsize,
607 const char *format, ...);
608#ifdef vsnprintf
609#undef vsnprintf
610#endif
611#define vsnprintf git_vsnprintf
612extern int git_vsnprintf(char *str, size_t maxsize,
613 const char *format, va_list ap);
614#endif
615
616#ifdef __GLIBC_PREREQ
617#if __GLIBC_PREREQ(2, 1)
618#define HAVE_STRCHRNUL
619#define HAVE_MEMPCPY
620#endif
621#endif
622
623#ifndef HAVE_STRCHRNUL
624#define strchrnul gitstrchrnul
625static inline char *gitstrchrnul(const char *s, int c)
626{
627 while (*s && *s != c)
628 s++;
629 return (char *)s;
630}
631#endif
632
633#ifndef HAVE_MEMPCPY
634#define mempcpy gitmempcpy
635static inline void *gitmempcpy(void *dest, const void *src, size_t n)
636{
637 return (char *)memcpy(dest, src, n) + n;
638}
639#endif
640
641#ifdef NO_INET_PTON
642int inet_pton(int af, const char *src, void *dst);
643#endif
644
645#ifdef NO_INET_NTOP
646const char *inet_ntop(int af, const void *src, char *dst, size_t size);
647#endif
648
649#ifdef NO_PTHREADS
650#define atexit git_atexit
651extern int git_atexit(void (*handler)(void));
652#endif
653
654extern void release_pack_memory(size_t);
655
656typedef void (*try_to_free_t)(size_t);
657extern try_to_free_t set_try_to_free_routine(try_to_free_t);
658
659#ifdef HAVE_ALLOCA_H
660# include <alloca.h>
661# define xalloca(size) (alloca(size))
662# define xalloca_free(p) do {} while (0)
663#else
664# define xalloca(size) (xmalloc(size))
665# define xalloca_free(p) (free(p))
666#endif
667extern char *xstrdup(const char *str);
668extern void *xmalloc(size_t size);
669extern void *xmallocz(size_t size);
670extern void *xmallocz_gently(size_t size);
671extern void *xmemdupz(const void *data, size_t len);
672extern char *xstrndup(const char *str, size_t len);
673extern void *xrealloc(void *ptr, size_t size);
674extern void *xcalloc(size_t nmemb, size_t size);
675extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
676extern ssize_t xread(int fd, void *buf, size_t len);
677extern ssize_t xwrite(int fd, const void *buf, size_t len);
678extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
679extern int xdup(int fd);
680extern FILE *xfdopen(int fd, const char *mode);
681extern int xmkstemp(char *template);
682extern int xmkstemp_mode(char *template, int mode);
683extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
684extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
685extern char *xgetcwd(void);
686
687#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x)))
688
689static inline size_t xsize_t(off_t len)
690{
691 if (len > (size_t) len)
692 die("Cannot handle files this big");
693 return (size_t)len;
694}
695
696/* in ctype.c, for kwset users */
697extern const char tolower_trans_tbl[256];
698
699/* Sane ctype - no locale, and works with signed chars */
700#undef isascii
701#undef isspace
702#undef isdigit
703#undef isalpha
704#undef isalnum
705#undef isprint
706#undef islower
707#undef isupper
708#undef tolower
709#undef toupper
710#undef iscntrl
711#undef ispunct
712#undef isxdigit
713
714extern const unsigned char sane_ctype[256];
715#define GIT_SPACE 0x01
716#define GIT_DIGIT 0x02
717#define GIT_ALPHA 0x04
718#define GIT_GLOB_SPECIAL 0x08
719#define GIT_REGEX_SPECIAL 0x10
720#define GIT_PATHSPEC_MAGIC 0x20
721#define GIT_CNTRL 0x40
722#define GIT_PUNCT 0x80
723#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
724#define isascii(x) (((x) & ~0x7f) == 0)
725#define isspace(x) sane_istest(x,GIT_SPACE)
726#define isdigit(x) sane_istest(x,GIT_DIGIT)
727#define isalpha(x) sane_istest(x,GIT_ALPHA)
728#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
729#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
730#define islower(x) sane_iscase(x, 1)
731#define isupper(x) sane_iscase(x, 0)
732#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
733#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
734#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
735#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
736 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
737#define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
738#define tolower(x) sane_case((unsigned char)(x), 0x20)
739#define toupper(x) sane_case((unsigned char)(x), 0)
740#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
741
742static inline int sane_case(int x, int high)
743{
744 if (sane_istest(x, GIT_ALPHA))
745 x = (x & ~0x20) | high;
746 return x;
747}
748
749static inline int sane_iscase(int x, int is_lower)
750{
751 if (!sane_istest(x, GIT_ALPHA))
752 return 0;
753
754 if (is_lower)
755 return (x & 0x20) != 0;
756 else
757 return (x & 0x20) == 0;
758}
759
760static inline int strtoul_ui(char const *s, int base, unsigned int *result)
761{
762 unsigned long ul;
763 char *p;
764
765 errno = 0;
766 ul = strtoul(s, &p, base);
767 if (errno || *p || p == s || (unsigned int) ul != ul)
768 return -1;
769 *result = ul;
770 return 0;
771}
772
773static inline int strtol_i(char const *s, int base, int *result)
774{
775 long ul;
776 char *p;
777
778 errno = 0;
779 ul = strtol(s, &p, base);
780 if (errno || *p || p == s || (int) ul != ul)
781 return -1;
782 *result = ul;
783 return 0;
784}
785
786#ifdef INTERNAL_QSORT
787void git_qsort(void *base, size_t nmemb, size_t size,
788 int(*compar)(const void *, const void *));
789#define qsort git_qsort
790#endif
791
792#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
793# define FORCE_DIR_SET_GID S_ISGID
794#else
795# define FORCE_DIR_SET_GID 0
796#endif
797
798#ifdef NO_NSEC
799#undef USE_NSEC
800#define ST_CTIME_NSEC(st) 0
801#define ST_MTIME_NSEC(st) 0
802#else
803#ifdef USE_ST_TIMESPEC
804#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
805#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
806#else
807#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
808#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
809#endif
810#endif
811
812#ifdef UNRELIABLE_FSTAT
813#define fstat_is_reliable() 0
814#else
815#define fstat_is_reliable() 1
816#endif
817
818#ifndef va_copy
819/*
820 * Since an obvious implementation of va_list would be to make it a
821 * pointer into the stack frame, a simple assignment will work on
822 * many systems. But let's try to be more portable.
823 */
824#ifdef __va_copy
825#define va_copy(dst, src) __va_copy(dst, src)
826#else
827#define va_copy(dst, src) ((dst) = (src))
828#endif
829#endif
830
831#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
832#define HAVE_VARIADIC_MACROS 1
833#endif
834
835/*
836 * Preserves errno, prints a message, but gives no warning for ENOENT.
837 * Returns 0 on success, which includes trying to unlink an object that does
838 * not exist.
839 */
840int unlink_or_warn(const char *path);
841 /*
842 * Tries to unlink file. Returns 0 if unlink succeeded
843 * or the file already didn't exist. Returns -1 and
844 * appends a message to err suitable for
845 * 'error("%s", err->buf)' on error.
846 */
847int unlink_or_msg(const char *file, struct strbuf *err);
848/*
849 * Preserves errno, prints a message, but gives no warning for ENOENT.
850 * Returns 0 on success, which includes trying to remove a directory that does
851 * not exist.
852 */
853int rmdir_or_warn(const char *path);
854/*
855 * Calls the correct function out of {unlink,rmdir}_or_warn based on
856 * the supplied file mode.
857 */
858int remove_or_warn(unsigned int mode, const char *path);
859
860/*
861 * Call access(2), but warn for any error except "missing file"
862 * (ENOENT or ENOTDIR).
863 */
864#define ACCESS_EACCES_OK (1U << 0)
865int access_or_warn(const char *path, int mode, unsigned flag);
866int access_or_die(const char *path, int mode, unsigned flag);
867
868/* Warn on an inaccessible file that ought to be accessible */
869void warn_on_inaccessible(const char *path);
870
871/* Get the passwd entry for the UID of the current process. */
872struct passwd *xgetpwuid_self(void);
873
874#ifdef GMTIME_UNRELIABLE_ERRORS
875struct tm *git_gmtime(const time_t *);
876struct tm *git_gmtime_r(const time_t *, struct tm *);
877#define gmtime git_gmtime
878#define gmtime_r git_gmtime_r
879#endif
880
881#endif