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) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
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#define bitsizeof(x) (CHAR_BIT * sizeof(x))
30
31#define maximum_signed_value_of_type(a) \
32 (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
33
34#define maximum_unsigned_value_of_type(a) \
35 (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
36
37/*
38 * Signed integer overflow is undefined in C, so here's a helper macro
39 * to detect if the sum of two integers will overflow.
40 *
41 * Requires: a >= 0, typeof(a) equals typeof(b)
42 */
43#define signed_add_overflows(a, b) \
44 ((b) > maximum_signed_value_of_type(a) - (a))
45
46#define unsigned_add_overflows(a, b) \
47 ((b) > maximum_unsigned_value_of_type(a) - (a))
48
49#ifdef __GNUC__
50#define TYPEOF(x) (__typeof__(x))
51#else
52#define TYPEOF(x)
53#endif
54
55#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
56#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
57
58#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
59
60/* Approximation of the length of the decimal representation of this type. */
61#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
62
63#if defined(__sun__)
64 /*
65 * On Solaris, when _XOPEN_EXTENDED is set, its header file
66 * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
67 * setting to say we are XPG5 or XPG6. Also on Solaris,
68 * XPG6 programs must be compiled with a c99 compiler, while
69 * non XPG6 programs must be compiled with a pre-c99 compiler.
70 */
71# if __STDC_VERSION__ - 0 >= 199901L
72# define _XOPEN_SOURCE 600
73# else
74# define _XOPEN_SOURCE 500
75# endif
76#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
77 !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
78 !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \
79 !defined(__CYGWIN__)
80#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
81#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
82#endif
83#define _ALL_SOURCE 1
84#define _GNU_SOURCE 1
85#define _BSD_SOURCE 1
86#define _DEFAULT_SOURCE 1
87#define _NETBSD_SOURCE 1
88#define _SGI_SOURCE 1
89
90#if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
91# if defined (_MSC_VER) && !defined(_WIN32_WINNT)
92# define _WIN32_WINNT 0x0502
93# endif
94#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
95#include <winsock2.h>
96#include <windows.h>
97#define GIT_WINDOWS_NATIVE
98#endif
99
100#include <unistd.h>
101#include <stdio.h>
102#include <sys/stat.h>
103#include <fcntl.h>
104#include <stddef.h>
105#include <stdlib.h>
106#include <stdarg.h>
107#include <string.h>
108#ifdef HAVE_STRINGS_H
109#include <strings.h> /* for strcasecmp() */
110#endif
111#include <errno.h>
112#include <limits.h>
113#ifdef NEEDS_SYS_PARAM_H
114#include <sys/param.h>
115#endif
116#include <sys/types.h>
117#include <dirent.h>
118#include <sys/time.h>
119#include <time.h>
120#include <signal.h>
121#include <assert.h>
122#include <regex.h>
123#include <utime.h>
124#include <syslog.h>
125#ifndef NO_SYS_POLL_H
126#include <sys/poll.h>
127#else
128#include <poll.h>
129#endif
130
131#if defined(__MINGW32__)
132/* pull in Windows compatibility stuff */
133#include "compat/mingw.h"
134#elif defined(_MSC_VER)
135#include "compat/msvc.h"
136#else
137#include <sys/wait.h>
138#include <sys/resource.h>
139#include <sys/socket.h>
140#include <sys/ioctl.h>
141#include <termios.h>
142#ifndef NO_SYS_SELECT_H
143#include <sys/select.h>
144#endif
145#include <netinet/in.h>
146#include <netinet/tcp.h>
147#include <arpa/inet.h>
148#include <netdb.h>
149#include <pwd.h>
150#include <sys/un.h>
151#ifndef NO_INTTYPES_H
152#include <inttypes.h>
153#else
154#include <stdint.h>
155#endif
156#ifdef NO_INTPTR_T
157/*
158 * On I16LP32, ILP32 and LP64 "long" is the save bet, however
159 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
160 * while on IP16 and IP16L32 it is "int" (resp. "short")
161 * Size needs to match (or exceed) 'sizeof(void *)'.
162 * We can't take "long long" here as not everybody has it.
163 */
164typedef long intptr_t;
165typedef unsigned long uintptr_t;
166#endif
167#if defined(__CYGWIN__)
168#undef _XOPEN_SOURCE
169#include <grp.h>
170#define _XOPEN_SOURCE 600
171#else
172#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
173#include <grp.h>
174#define _ALL_SOURCE 1
175#endif
176#endif
177
178/* used on Mac OS X */
179#ifdef PRECOMPOSE_UNICODE
180#include "compat/precompose_utf8.h"
181#else
182#define precompose_str(in,i_nfd2nfc)
183#define precompose_argv(c,v)
184#define probe_utf8_pathname_composition(a,b)
185#endif
186
187#ifdef MKDIR_WO_TRAILING_SLASH
188#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
189extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
190#endif
191
192#ifdef NO_STRUCT_ITIMERVAL
193struct itimerval {
194 struct timeval it_interval;
195 struct timeval it_value;
196};
197#endif
198
199#ifdef NO_SETITIMER
200#define setitimer(which,value,ovalue)
201#endif
202
203#ifndef NO_LIBGEN_H
204#include <libgen.h>
205#else
206#define basename gitbasename
207extern char *gitbasename(char *);
208#endif
209
210#ifndef NO_ICONV
211#include <iconv.h>
212#endif
213
214#ifndef NO_OPENSSL
215#include <openssl/ssl.h>
216#include <openssl/err.h>
217#endif
218
219/* On most systems <netdb.h> would have given us this, but
220 * not on some systems (e.g. z/OS).
221 */
222#ifndef NI_MAXHOST
223#define NI_MAXHOST 1025
224#endif
225
226#ifndef NI_MAXSERV
227#define NI_MAXSERV 32
228#endif
229
230/* On most systems <limits.h> would have given us this, but
231 * not on some systems (e.g. GNU/Hurd).
232 */
233#ifndef PATH_MAX
234#define PATH_MAX 4096
235#endif
236
237#ifndef PRIuMAX
238#define PRIuMAX "llu"
239#endif
240
241#ifndef PRIu32
242#define PRIu32 "u"
243#endif
244
245#ifndef PRIx32
246#define PRIx32 "x"
247#endif
248
249#ifndef PRIo32
250#define PRIo32 "o"
251#endif
252
253#ifndef PATH_SEP
254#define PATH_SEP ':'
255#endif
256
257#ifdef HAVE_PATHS_H
258#include <paths.h>
259#endif
260#ifndef _PATH_DEFPATH
261#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
262#endif
263
264#ifndef STRIP_EXTENSION
265#define STRIP_EXTENSION ""
266#endif
267
268#ifndef has_dos_drive_prefix
269static inline int git_has_dos_drive_prefix(const char *path)
270{
271 return 0;
272}
273#define has_dos_drive_prefix git_has_dos_drive_prefix
274#endif
275
276#ifndef is_dir_sep
277static inline int git_is_dir_sep(int c)
278{
279 return c == '/';
280}
281#define is_dir_sep git_is_dir_sep
282#endif
283
284#ifndef offset_1st_component
285static inline int git_offset_1st_component(const char *path)
286{
287 return is_dir_sep(path[0]);
288}
289#define offset_1st_component git_offset_1st_component
290#endif
291
292#ifndef find_last_dir_sep
293static inline char *git_find_last_dir_sep(const char *path)
294{
295 return strrchr(path, '/');
296}
297#define find_last_dir_sep git_find_last_dir_sep
298#endif
299
300#if defined(__HP_cc) && (__HP_cc >= 61000)
301#define NORETURN __attribute__((noreturn))
302#define NORETURN_PTR
303#elif defined(__GNUC__) && !defined(NO_NORETURN)
304#define NORETURN __attribute__((__noreturn__))
305#define NORETURN_PTR __attribute__((__noreturn__))
306#elif defined(_MSC_VER)
307#define NORETURN __declspec(noreturn)
308#define NORETURN_PTR
309#else
310#define NORETURN
311#define NORETURN_PTR
312#ifndef __GNUC__
313#ifndef __attribute__
314#define __attribute__(x)
315#endif
316#endif
317#endif
318
319/* The sentinel attribute is valid from gcc version 4.0 */
320#if defined(__GNUC__) && (__GNUC__ >= 4)
321#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
322#else
323#define LAST_ARG_MUST_BE_NULL
324#endif
325
326#include "compat/bswap.h"
327
328#include "wildmatch.h"
329
330struct strbuf;
331
332/* General helper functions */
333extern void vreportf(const char *prefix, const char *err, va_list params);
334extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
335extern NORETURN void usage(const char *err);
336extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
337extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
338extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
339extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
340extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
341
342#ifndef NO_OPENSSL
343#ifdef APPLE_COMMON_CRYPTO
344#include "compat/apple-common-crypto.h"
345#else
346#include <openssl/evp.h>
347#include <openssl/hmac.h>
348#endif /* APPLE_COMMON_CRYPTO */
349#include <openssl/x509v3.h>
350#endif /* NO_OPENSSL */
351
352/*
353 * Let callers be aware of the constant return value; this can help
354 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
355 * because some compilers may not support variadic macros. Since we're only
356 * trying to help gcc, anyway, it's OK; other compilers will fall back to
357 * using the function as usual.
358 */
359#if defined(__GNUC__)
360static inline int const_error(void)
361{
362 return -1;
363}
364#define error(...) (error(__VA_ARGS__), const_error())
365#endif
366
367extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
368extern void set_error_routine(void (*routine)(const char *err, va_list params));
369extern void set_die_is_recursing_routine(int (*routine)(void));
370
371extern int starts_with(const char *str, const char *prefix);
372
373/*
374 * If the string "str" begins with the string found in "prefix", return 1.
375 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
376 * the string right after the prefix).
377 *
378 * Otherwise, return 0 and leave "out" untouched.
379 *
380 * Examples:
381 *
382 * [extract branch name, fail if not a branch]
383 * if (!skip_prefix(ref, "refs/heads/", &branch)
384 * return -1;
385 *
386 * [skip prefix if present, otherwise use whole string]
387 * skip_prefix(name, "refs/heads/", &name);
388 */
389static inline int skip_prefix(const char *str, const char *prefix,
390 const char **out)
391{
392 do {
393 if (!*prefix) {
394 *out = str;
395 return 1;
396 }
397 } while (*str++ == *prefix++);
398 return 0;
399}
400
401/*
402 * If buf ends with suffix, return 1 and subtract the length of the suffix
403 * from *len. Otherwise, return 0 and leave *len untouched.
404 */
405static inline int strip_suffix_mem(const char *buf, size_t *len,
406 const char *suffix)
407{
408 size_t suflen = strlen(suffix);
409 if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
410 return 0;
411 *len -= suflen;
412 return 1;
413}
414
415/*
416 * If str ends with suffix, return 1 and set *len to the size of the string
417 * without the suffix. Otherwise, return 0 and set *len to the size of the
418 * string.
419 *
420 * Note that we do _not_ NUL-terminate str to the new length.
421 */
422static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
423{
424 *len = strlen(str);
425 return strip_suffix_mem(str, len, suffix);
426}
427
428static inline int ends_with(const char *str, const char *suffix)
429{
430 size_t len;
431 return strip_suffix(str, suffix, &len);
432}
433
434#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
435
436#ifndef PROT_READ
437#define PROT_READ 1
438#define PROT_WRITE 2
439#define MAP_PRIVATE 1
440#endif
441
442#define mmap git_mmap
443#define munmap git_munmap
444extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
445extern int git_munmap(void *start, size_t length);
446
447#else /* NO_MMAP || USE_WIN32_MMAP */
448
449#include <sys/mman.h>
450
451#endif /* NO_MMAP || USE_WIN32_MMAP */
452
453#ifdef NO_MMAP
454
455/* This value must be multiple of (pagesize * 2) */
456#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
457
458#else /* NO_MMAP */
459
460/* This value must be multiple of (pagesize * 2) */
461#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
462 (sizeof(void*) >= 8 \
463 ? 1 * 1024 * 1024 * 1024 \
464 : 32 * 1024 * 1024)
465
466#endif /* NO_MMAP */
467
468#ifndef MAP_FAILED
469#define MAP_FAILED ((void *)-1)
470#endif
471
472#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
473#define on_disk_bytes(st) ((st).st_size)
474#else
475#define on_disk_bytes(st) ((st).st_blocks * 512)
476#endif
477
478#ifdef NEEDS_MODE_TRANSLATION
479#undef S_IFMT
480#undef S_IFREG
481#undef S_IFDIR
482#undef S_IFLNK
483#undef S_IFBLK
484#undef S_IFCHR
485#undef S_IFIFO
486#undef S_IFSOCK
487#define S_IFMT 0170000
488#define S_IFREG 0100000
489#define S_IFDIR 0040000
490#define S_IFLNK 0120000
491#define S_IFBLK 0060000
492#define S_IFCHR 0020000
493#define S_IFIFO 0010000
494#define S_IFSOCK 0140000
495#ifdef stat
496#undef stat
497#endif
498#define stat(path, buf) git_stat(path, buf)
499extern int git_stat(const char *, struct stat *);
500#ifdef fstat
501#undef fstat
502#endif
503#define fstat(fd, buf) git_fstat(fd, buf)
504extern int git_fstat(int, struct stat *);
505#ifdef lstat
506#undef lstat
507#endif
508#define lstat(path, buf) git_lstat(path, buf)
509extern int git_lstat(const char *, struct stat *);
510#endif
511
512#define DEFAULT_PACKED_GIT_LIMIT \
513 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
514
515#ifdef NO_PREAD
516#define pread git_pread
517extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
518#endif
519/*
520 * Forward decl that will remind us if its twin in cache.h changes.
521 * This function is used in compat/pread.c. But we can't include
522 * cache.h there.
523 */
524extern ssize_t read_in_full(int fd, void *buf, size_t count);
525
526#ifdef NO_SETENV
527#define setenv gitsetenv
528extern int gitsetenv(const char *, const char *, int);
529#endif
530
531#ifdef NO_MKDTEMP
532#define mkdtemp gitmkdtemp
533extern char *gitmkdtemp(char *);
534#endif
535
536#ifdef NO_MKSTEMPS
537#define mkstemps gitmkstemps
538extern int gitmkstemps(char *, int);
539#endif
540
541#ifdef NO_UNSETENV
542#define unsetenv gitunsetenv
543extern void gitunsetenv(const char *);
544#endif
545
546#ifdef NO_STRCASESTR
547#define strcasestr gitstrcasestr
548extern char *gitstrcasestr(const char *haystack, const char *needle);
549#endif
550
551#ifdef NO_STRLCPY
552#define strlcpy gitstrlcpy
553extern size_t gitstrlcpy(char *, const char *, size_t);
554#endif
555
556#ifdef NO_STRTOUMAX
557#define strtoumax gitstrtoumax
558extern uintmax_t gitstrtoumax(const char *, char **, int);
559#define strtoimax gitstrtoimax
560extern intmax_t gitstrtoimax(const char *, char **, int);
561#endif
562
563#ifdef NO_HSTRERROR
564#define hstrerror githstrerror
565extern const char *githstrerror(int herror);
566#endif
567
568#ifdef NO_MEMMEM
569#define memmem gitmemmem
570void *gitmemmem(const void *haystack, size_t haystacklen,
571 const void *needle, size_t needlelen);
572#endif
573
574#ifdef NO_GETPAGESIZE
575#define getpagesize() sysconf(_SC_PAGESIZE)
576#endif
577
578#ifdef FREAD_READS_DIRECTORIES
579#ifdef fopen
580#undef fopen
581#endif
582#define fopen(a,b) git_fopen(a,b)
583extern FILE *git_fopen(const char*, const char*);
584#endif
585
586#ifdef SNPRINTF_RETURNS_BOGUS
587#ifdef snprintf
588#undef snprintf
589#endif
590#define snprintf git_snprintf
591extern int git_snprintf(char *str, size_t maxsize,
592 const char *format, ...);
593#ifdef vsnprintf
594#undef vsnprintf
595#endif
596#define vsnprintf git_vsnprintf
597extern int git_vsnprintf(char *str, size_t maxsize,
598 const char *format, va_list ap);
599#endif
600
601#ifdef __GLIBC_PREREQ
602#if __GLIBC_PREREQ(2, 1)
603#define HAVE_STRCHRNUL
604#define HAVE_MEMPCPY
605#endif
606#endif
607
608#ifndef HAVE_STRCHRNUL
609#define strchrnul gitstrchrnul
610static inline char *gitstrchrnul(const char *s, int c)
611{
612 while (*s && *s != c)
613 s++;
614 return (char *)s;
615}
616#endif
617
618#ifndef HAVE_MEMPCPY
619#define mempcpy gitmempcpy
620static inline void *gitmempcpy(void *dest, const void *src, size_t n)
621{
622 return (char *)memcpy(dest, src, n) + n;
623}
624#endif
625
626#ifdef NO_INET_PTON
627int inet_pton(int af, const char *src, void *dst);
628#endif
629
630#ifdef NO_INET_NTOP
631const char *inet_ntop(int af, const void *src, char *dst, size_t size);
632#endif
633
634#ifdef NO_PTHREADS
635#define atexit git_atexit
636extern int git_atexit(void (*handler)(void));
637#endif
638
639extern void release_pack_memory(size_t);
640
641typedef void (*try_to_free_t)(size_t);
642extern try_to_free_t set_try_to_free_routine(try_to_free_t);
643
644#ifdef HAVE_ALLOCA_H
645# include <alloca.h>
646# define xalloca(size) (alloca(size))
647# define xalloca_free(p) do {} while (0)
648#else
649# define xalloca(size) (xmalloc(size))
650# define xalloca_free(p) (free(p))
651#endif
652extern char *xstrdup(const char *str);
653extern void *xmalloc(size_t size);
654extern void *xmallocz(size_t size);
655extern void *xmallocz_gently(size_t size);
656extern void *xmemdupz(const void *data, size_t len);
657extern char *xstrndup(const char *str, size_t len);
658extern void *xrealloc(void *ptr, size_t size);
659extern void *xcalloc(size_t nmemb, size_t size);
660extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
661extern ssize_t xread(int fd, void *buf, size_t len);
662extern ssize_t xwrite(int fd, const void *buf, size_t len);
663extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
664extern int xdup(int fd);
665extern FILE *xfdopen(int fd, const char *mode);
666extern int xmkstemp(char *template);
667extern int xmkstemp_mode(char *template, int mode);
668extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
669extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
670extern char *xgetcwd(void);
671
672#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x)))
673
674static inline size_t xsize_t(off_t len)
675{
676 if (len > (size_t) len)
677 die("Cannot handle files this big");
678 return (size_t)len;
679}
680
681/* in ctype.c, for kwset users */
682extern const char tolower_trans_tbl[256];
683
684/* Sane ctype - no locale, and works with signed chars */
685#undef isascii
686#undef isspace
687#undef isdigit
688#undef isalpha
689#undef isalnum
690#undef isprint
691#undef islower
692#undef isupper
693#undef tolower
694#undef toupper
695#undef iscntrl
696#undef ispunct
697#undef isxdigit
698
699extern const unsigned char sane_ctype[256];
700#define GIT_SPACE 0x01
701#define GIT_DIGIT 0x02
702#define GIT_ALPHA 0x04
703#define GIT_GLOB_SPECIAL 0x08
704#define GIT_REGEX_SPECIAL 0x10
705#define GIT_PATHSPEC_MAGIC 0x20
706#define GIT_CNTRL 0x40
707#define GIT_PUNCT 0x80
708#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
709#define isascii(x) (((x) & ~0x7f) == 0)
710#define isspace(x) sane_istest(x,GIT_SPACE)
711#define isdigit(x) sane_istest(x,GIT_DIGIT)
712#define isalpha(x) sane_istest(x,GIT_ALPHA)
713#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
714#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
715#define islower(x) sane_iscase(x, 1)
716#define isupper(x) sane_iscase(x, 0)
717#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
718#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
719#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
720#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
721 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
722#define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
723#define tolower(x) sane_case((unsigned char)(x), 0x20)
724#define toupper(x) sane_case((unsigned char)(x), 0)
725#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
726
727static inline int sane_case(int x, int high)
728{
729 if (sane_istest(x, GIT_ALPHA))
730 x = (x & ~0x20) | high;
731 return x;
732}
733
734static inline int sane_iscase(int x, int is_lower)
735{
736 if (!sane_istest(x, GIT_ALPHA))
737 return 0;
738
739 if (is_lower)
740 return (x & 0x20) != 0;
741 else
742 return (x & 0x20) == 0;
743}
744
745static inline int strtoul_ui(char const *s, int base, unsigned int *result)
746{
747 unsigned long ul;
748 char *p;
749
750 errno = 0;
751 ul = strtoul(s, &p, base);
752 if (errno || *p || p == s || (unsigned int) ul != ul)
753 return -1;
754 *result = ul;
755 return 0;
756}
757
758static inline int strtol_i(char const *s, int base, int *result)
759{
760 long ul;
761 char *p;
762
763 errno = 0;
764 ul = strtol(s, &p, base);
765 if (errno || *p || p == s || (int) ul != ul)
766 return -1;
767 *result = ul;
768 return 0;
769}
770
771#ifdef INTERNAL_QSORT
772void git_qsort(void *base, size_t nmemb, size_t size,
773 int(*compar)(const void *, const void *));
774#define qsort git_qsort
775#endif
776
777#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
778# define FORCE_DIR_SET_GID S_ISGID
779#else
780# define FORCE_DIR_SET_GID 0
781#endif
782
783#ifdef NO_NSEC
784#undef USE_NSEC
785#define ST_CTIME_NSEC(st) 0
786#define ST_MTIME_NSEC(st) 0
787#else
788#ifdef USE_ST_TIMESPEC
789#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
790#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
791#else
792#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
793#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
794#endif
795#endif
796
797#ifdef UNRELIABLE_FSTAT
798#define fstat_is_reliable() 0
799#else
800#define fstat_is_reliable() 1
801#endif
802
803#ifndef va_copy
804/*
805 * Since an obvious implementation of va_list would be to make it a
806 * pointer into the stack frame, a simple assignment will work on
807 * many systems. But let's try to be more portable.
808 */
809#ifdef __va_copy
810#define va_copy(dst, src) __va_copy(dst, src)
811#else
812#define va_copy(dst, src) ((dst) = (src))
813#endif
814#endif
815
816#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
817#define HAVE_VARIADIC_MACROS 1
818#endif
819
820/*
821 * Preserves errno, prints a message, but gives no warning for ENOENT.
822 * Returns 0 on success, which includes trying to unlink an object that does
823 * not exist.
824 */
825int unlink_or_warn(const char *path);
826 /*
827 * Tries to unlink file. Returns 0 if unlink succeeded
828 * or the file already didn't exist. Returns -1 and
829 * appends a message to err suitable for
830 * 'error("%s", err->buf)' on error.
831 */
832int unlink_or_msg(const char *file, struct strbuf *err);
833/*
834 * Preserves errno, prints a message, but gives no warning for ENOENT.
835 * Returns 0 on success, which includes trying to remove a directory that does
836 * not exist.
837 */
838int rmdir_or_warn(const char *path);
839/*
840 * Calls the correct function out of {unlink,rmdir}_or_warn based on
841 * the supplied file mode.
842 */
843int remove_or_warn(unsigned int mode, const char *path);
844
845/*
846 * Call access(2), but warn for any error except "missing file"
847 * (ENOENT or ENOTDIR).
848 */
849#define ACCESS_EACCES_OK (1U << 0)
850int access_or_warn(const char *path, int mode, unsigned flag);
851int access_or_die(const char *path, int mode, unsigned flag);
852
853/* Warn on an inaccessible file that ought to be accessible */
854void warn_on_inaccessible(const char *path);
855
856/* Get the passwd entry for the UID of the current process. */
857struct passwd *xgetpwuid_self(void);
858
859#ifdef GMTIME_UNRELIABLE_ERRORS
860struct tm *git_gmtime(const time_t *);
861struct tm *git_gmtime_r(const time_t *, struct tm *);
862#define gmtime git_gmtime
863#define gmtime_r git_gmtime_r
864#endif
865
866#endif