Add the LAST_ARG_MUST_BE_NULL macro
[git/git.git] / git-compat-util.h
CommitLineData
4050c0df
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1#ifndef GIT_COMPAT_UTIL_H
2#define GIT_COMPAT_UTIL_H
3
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4#define _FILE_OFFSET_BITS 64
5
8f1d2e6f 6#ifndef FLEX_ARRAY
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7/*
8 * See if our compiler is known to support flexible array members.
9 */
203ee91f 10#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
8e973991
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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
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25#endif
26#endif
27
b4f2a6ac 28#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
f630cfda 29#define bitsizeof(x) (CHAR_BIT * sizeof(x))
b4f2a6ac 30
c03c8315
EFL
31#define maximum_signed_value_of_type(a) \
32 (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
33
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34#define maximum_unsigned_value_of_type(a) \
35 (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
36
c03c8315
EFL
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
1368f650
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46#define unsigned_add_overflows(a, b) \
47 ((b) > maximum_unsigned_value_of_type(a) - (a))
48
8723f216
NP
49#ifdef __GNUC__
50#define TYPEOF(x) (__typeof__(x))
51#else
52#define TYPEOF(x)
53#endif
54
f630cfda 55#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
db7244bd 56#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
8723f216 57
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58#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
59
cf606e3d
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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
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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
6555b196 76#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
6c109904 77 !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
40036bed 78 !defined(__TANDEM) && !defined(__QNX__)
85023577
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79#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
80#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
c902c9a6 81#endif
fb952206
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82#define _ALL_SOURCE 1
83#define _GNU_SOURCE 1
84#define _BSD_SOURCE 1
9a695fbf 85#define _NETBSD_SOURCE 1
9398b859 86#define _SGI_SOURCE 1
85023577 87
435bdf8c 88#ifdef WIN32 /* Both MinGW and MSVC */
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89# if defined (_MSC_VER)
90# define _WIN32_WINNT 0x0502
91# endif
435bdf8c
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92#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
93#include <winsock2.h>
94#include <windows.h>
95#endif
96
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97#include <unistd.h>
98#include <stdio.h>
99#include <sys/stat.h>
100#include <fcntl.h>
101#include <stddef.h>
102#include <stdlib.h>
103#include <stdarg.h>
104#include <string.h>
b3e103da 105#ifdef HAVE_STRINGS_H
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106#include <strings.h> /* for strcasecmp() */
107#endif
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108#include <errno.h>
109#include <limits.h>
b2d05e06 110#ifdef NEEDS_SYS_PARAM_H
4050c0df 111#include <sys/param.h>
6ede7205 112#endif
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113#include <sys/types.h>
114#include <dirent.h>
85023577
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115#include <sys/time.h>
116#include <time.h>
117#include <signal.h>
cebcab18 118#ifndef USE_WILDMATCH
85023577 119#include <fnmatch.h>
cebcab18 120#endif
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121#include <assert.h>
122#include <regex.h>
123#include <utime.h>
088d8802 124#include <syslog.h>
2844923d 125#ifndef NO_SYS_POLL_H
fdc12114 126#include <sys/poll.h>
2844923d
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127#else
128#include <poll.h>
129#endif
cfc755d3
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130#if defined(__MINGW32__)
131/* pull in Windows compatibility stuff */
132#include "compat/mingw.h"
133#elif defined(_MSC_VER)
134#include "compat/msvc.h"
135#else
f4626df5 136#include <sys/wait.h>
ebae9ff9 137#include <sys/resource.h>
85023577 138#include <sys/socket.h>
80bbe72b 139#include <sys/ioctl.h>
eb80042c 140#include <termios.h>
2600973f 141#ifndef NO_SYS_SELECT_H
80bbe72b 142#include <sys/select.h>
2600973f 143#endif
85023577
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144#include <netinet/in.h>
145#include <netinet/tcp.h>
146#include <arpa/inet.h>
147#include <netdb.h>
148#include <pwd.h>
e2770979 149#include <sys/un.h>
2844923d 150#ifndef NO_INTTYPES_H
007e2ba6 151#include <inttypes.h>
2844923d
MD
152#else
153#include <stdint.h>
154#endif
6c109904
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155#ifdef NO_INTPTR_T
156/*
157 * On I16LP32, ILP32 and LP64 "long" is the save bet, however
158 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
159 * while on IP16 and IP16L32 it is "int" (resp. "short")
160 * Size needs to match (or exceed) 'sizeof(void *)'.
161 * We can't take "long long" here as not everybody has it.
162 */
163typedef long intptr_t;
164typedef unsigned long uintptr_t;
165#endif
0117c2f0 166int get_st_mode_bits(const char *path, int *mode);
41b20017
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167#if defined(__CYGWIN__)
168#undef _XOPEN_SOURCE
169#include <grp.h>
170#define _XOPEN_SOURCE 600
adbc0b6b 171#include "compat/cygwin.h"
41b20017 172#else
fb952206 173#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577 174#include <grp.h>
fb952206 175#define _ALL_SOURCE 1
41b20017 176#endif
d75f8e61 177#endif
85023577 178
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179/* used on Mac OS X */
180#ifdef PRECOMPOSE_UNICODE
181#include "compat/precompose_utf8.h"
182#else
183#define precompose_str(in,i_nfd2nfc)
184#define precompose_argv(c,v)
185#define probe_utf8_pathname_composition(a,b)
186#endif
187
0539ecfd
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188#ifdef MKDIR_WO_TRAILING_SLASH
189#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
190extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
191#endif
192
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193#ifdef NO_STRUCT_ITIMERVAL
194struct itimerval {
195 struct timeval it_interval;
196 struct timeval it_value;
197}
198#endif
199
200#ifdef NO_SETITIMER
201#define setitimer(which,value,ovalue)
202#endif
203
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DA
204#ifndef NO_LIBGEN_H
205#include <libgen.h>
206#else
207#define basename gitbasename
208extern char *gitbasename(char *);
209#endif
210
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211#ifndef NO_ICONV
212#include <iconv.h>
213#endif
4050c0df 214
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215#ifndef NO_OPENSSL
216#include <openssl/ssl.h>
217#include <openssl/err.h>
218#endif
219
3b130ade
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220/* On most systems <netdb.h> would have given us this, but
221 * not on some systems (e.g. z/OS).
222 */
223#ifndef NI_MAXHOST
224#define NI_MAXHOST 1025
225#endif
226
227#ifndef NI_MAXSERV
228#define NI_MAXSERV 32
229#endif
230
d0c2449f
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231/* On most systems <limits.h> would have given us this, but
232 * not on some systems (e.g. GNU/Hurd).
233 */
234#ifndef PATH_MAX
235#define PATH_MAX 4096
236#endif
237
c4001d92
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238#ifndef PRIuMAX
239#define PRIuMAX "llu"
240#endif
241
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242#ifndef PRIu32
243#define PRIu32 "u"
244#endif
245
246#ifndef PRIx32
247#define PRIx32 "x"
248#endif
249
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250#ifndef PRIo32
251#define PRIo32 "o"
252#endif
253
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254#ifndef PATH_SEP
255#define PATH_SEP ':'
256#endif
257
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258#ifdef HAVE_PATHS_H
259#include <paths.h>
260#endif
261#ifndef _PATH_DEFPATH
262#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
263#endif
264
23326d14
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265#ifndef STRIP_EXTENSION
266#define STRIP_EXTENSION ""
267#endif
268
25fe217b
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269#ifndef has_dos_drive_prefix
270#define has_dos_drive_prefix(path) 0
271#endif
272
273#ifndef is_dir_sep
274#define is_dir_sep(c) ((c) == '/')
275#endif
276
d1c69255
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277#ifndef find_last_dir_sep
278#define find_last_dir_sep(path) strrchr(path, '/')
279#endif
280
e4ac953b 281#if defined(__HP_cc) && (__HP_cc >= 61000)
b6ab349b
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282#define NORETURN __attribute__((noreturn))
283#define NORETURN_PTR
6520c846 284#elif defined(__GNUC__) && !defined(NO_NORETURN)
4050c0df 285#define NORETURN __attribute__((__noreturn__))
18660bc9 286#define NORETURN_PTR __attribute__((__noreturn__))
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287#elif defined(_MSC_VER)
288#define NORETURN __declspec(noreturn)
289#define NORETURN_PTR
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290#else
291#define NORETURN
18660bc9 292#define NORETURN_PTR
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293#ifndef __attribute__
294#define __attribute__(x)
295#endif
296#endif
297
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RJ
298/* The sentinel attribute is valid from gcc version 4.0 */
299#if defined(__GNUC__) && (__GNUC__ >= 4)
300#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
301#else
302#define LAST_ARG_MUST_BE_NULL
303#endif
304
51ea5519
NP
305#include "compat/bswap.h"
306
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NTND
307#ifdef USE_WILDMATCH
308#include "wildmatch.h"
309#define FNM_PATHNAME WM_PATHNAME
310#define FNM_CASEFOLD WM_CASEFOLD
311#define FNM_NOMATCH WM_NOMATCH
312static inline int fnmatch(const char *pattern, const char *string, int flags)
313{
314 return wildmatch(pattern, string, flags, NULL);
315}
316#endif
317
4050c0df 318/* General helper functions */
ebaa79f4 319extern void vreportf(const char *prefix, const char *err, va_list params);
3bc4181f 320extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
a4f3131c 321extern NORETURN void usage(const char *err);
64b1cb74 322extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
a4f3131c
EFL
323extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
324extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df 325extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9 326extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df 327
e208f9cc
JK
328/*
329 * Let callers be aware of the constant return value; this can help
9798f7e5
MK
330 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
331 * because some compilers may not support variadic macros. Since we're only
332 * trying to help gcc, anyway, it's OK; other compilers will fall back to
333 * using the function as usual.
e208f9cc 334 */
5ded807f 335#if defined(__GNUC__) && ! defined(__clang__)
9798f7e5 336#define error(...) (error(__VA_ARGS__), -1)
e208f9cc
JK
337#endif
338
18660bc9 339extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
3bc4181f 340extern void set_error_routine(void (*routine)(const char *err, va_list params));
c19a490e 341extern void set_die_is_recursing_routine(int (*routine)(void));
39a3f5ea 342
698a68be 343extern int prefixcmp(const char *str, const char *prefix);
8cc5b290 344extern int suffixcmp(const char *str, const char *suffix);
698a68be 345
fbca5837
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346static inline const char *skip_prefix(const char *str, const char *prefix)
347{
348 size_t len = strlen(prefix);
349 return strncmp(str, prefix, len) ? NULL : str + len;
350}
351
b130a72b 352#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
4050c0df
JH
353
354#ifndef PROT_READ
355#define PROT_READ 1
356#define PROT_WRITE 2
357#define MAP_PRIVATE 1
4050c0df
JH
358#endif
359
d6779124
SP
360#define mmap git_mmap
361#define munmap git_munmap
362extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
363extern int git_munmap(void *start, size_t length);
4050c0df 364
b130a72b
JL
365#else /* NO_MMAP || USE_WIN32_MMAP */
366
367#include <sys/mman.h>
368
369#endif /* NO_MMAP || USE_WIN32_MMAP */
370
371#ifdef NO_MMAP
372
5faaf246 373/* This value must be multiple of (pagesize * 2) */
8c82534d
SP
374#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
375
4050c0df
JH
376#else /* NO_MMAP */
377
5faaf246 378/* This value must be multiple of (pagesize * 2) */
22bac0ea
SP
379#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
380 (sizeof(void*) >= 8 \
381 ? 1 * 1024 * 1024 * 1024 \
382 : 32 * 1024 * 1024)
4050c0df
JH
383
384#endif /* NO_MMAP */
385
fcf3a21a
GV
386#ifndef MAP_FAILED
387#define MAP_FAILED ((void *)-1)
388#endif
389
fdb2a2a6
JH
390#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
391#define on_disk_bytes(st) ((st).st_size)
392#else
393#define on_disk_bytes(st) ((st).st_blocks * 512)
394#endif
395
22bac0ea 396#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a 397 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d 398
6900679c
SH
399#ifdef NO_PREAD
400#define pread git_pread
401extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
402#endif
14086b0a
SP
403/*
404 * Forward decl that will remind us if its twin in cache.h changes.
405 * This function is used in compat/pread.c. But we can't include
406 * cache.h there.
407 */
408extern ssize_t read_in_full(int fd, void *buf, size_t count);
6900679c 409
4050c0df
JH
410#ifdef NO_SETENV
411#define setenv gitsetenv
412extern int gitsetenv(const char *, const char *, int);
413#endif
414
ca5bb5d5
SP
415#ifdef NO_MKDTEMP
416#define mkdtemp gitmkdtemp
417extern char *gitmkdtemp(char *);
418#endif
419
0620b39b
DA
420#ifdef NO_MKSTEMPS
421#define mkstemps gitmkstemps
422extern int gitmkstemps(char *, int);
423#endif
424
731043fd
JR
425#ifdef NO_UNSETENV
426#define unsetenv gitunsetenv
427extern void gitunsetenv(const char *);
428#endif
429
4050c0df
JH
430#ifdef NO_STRCASESTR
431#define strcasestr gitstrcasestr
432extern char *gitstrcasestr(const char *haystack, const char *needle);
433#endif
434
817151e6
PE
435#ifdef NO_STRLCPY
436#define strlcpy gitstrlcpy
437extern size_t gitstrlcpy(char *, const char *, size_t);
438#endif
439
bc6b4f52
JR
440#ifdef NO_STRTOUMAX
441#define strtoumax gitstrtoumax
442extern uintmax_t gitstrtoumax(const char *, char **, int);
97000ba6
JS
443#define strtoimax gitstrtoimax
444extern intmax_t gitstrtoimax(const char *, char **, int);
bc6b4f52
JR
445#endif
446
fa0c87c3
AR
447#ifdef NO_HSTRERROR
448#define hstrerror githstrerror
449extern const char *githstrerror(int herror);
450#endif
451
b21b9f1d
RS
452#ifdef NO_MEMMEM
453#define memmem gitmemmem
454void *gitmemmem(const void *haystack, size_t haystacklen,
455 const void *needle, size_t needlelen);
456#endif
457
40036bed
MK
458#ifdef NO_GETPAGESIZE
459#define getpagesize() sysconf(_SC_PAGESIZE)
460#endif
461
cba22528 462#ifdef FREAD_READS_DIRECTORIES
c5445fe0
JS
463#ifdef fopen
464#undef fopen
465#endif
cba22528
BC
466#define fopen(a,b) git_fopen(a,b)
467extern FILE *git_fopen(const char*, const char*);
468#endif
469
c4582f93
MR
470#ifdef SNPRINTF_RETURNS_BOGUS
471#define snprintf git_snprintf
472extern int git_snprintf(char *str, size_t maxsize,
473 const char *format, ...);
474#define vsnprintf git_vsnprintf
475extern int git_vsnprintf(char *str, size_t maxsize,
476 const char *format, va_list ap);
477#endif
478
726c8ef5
JS
479#ifdef __GLIBC_PREREQ
480#if __GLIBC_PREREQ(2, 1)
481#define HAVE_STRCHRNUL
137c6eaa 482#define HAVE_MEMPCPY
726c8ef5
JS
483#endif
484#endif
485
486#ifndef HAVE_STRCHRNUL
659c69cf 487#define strchrnul gitstrchrnul
9e79f00f
AE
488static inline char *gitstrchrnul(const char *s, int c)
489{
490 while (*s && *s != c)
491 s++;
492 return (char *)s;
493}
659c69cf
RS
494#endif
495
137c6eaa
JN
496#ifndef HAVE_MEMPCPY
497#define mempcpy gitmempcpy
498static inline void *gitmempcpy(void *dest, const void *src, size_t n)
499{
500 return (char *)memcpy(dest, src, n) + n;
501}
502#endif
503
da523cc5
MP
504#ifdef NO_INET_PTON
505int inet_pton(int af, const char *src, void *dst);
506#endif
507
508#ifdef NO_INET_NTOP
509const char *inet_ntop(int af, const void *src, char *dst, size_t size);
510#endif
511
d1efefa4 512extern void release_pack_memory(size_t, int);
97bfeb34 513
851c34b0
JS
514typedef void (*try_to_free_t)(size_t);
515extern try_to_free_t set_try_to_free_routine(try_to_free_t);
a9a74636 516
112db553
LT
517extern char *xstrdup(const char *str);
518extern void *xmalloc(size_t size);
5bf9219d 519extern void *xmallocz(size_t size);
112db553
LT
520extern void *xmemdupz(const void *data, size_t len);
521extern char *xstrndup(const char *str, size_t len);
522extern void *xrealloc(void *ptr, size_t size);
523extern void *xcalloc(size_t nmemb, size_t size);
524extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
525extern ssize_t xread(int fd, void *buf, size_t len);
526extern ssize_t xwrite(int fd, const void *buf, size_t len);
527extern int xdup(int fd);
528extern FILE *xfdopen(int fd, const char *mode);
529extern int xmkstemp(char *template);
463db9b1 530extern int xmkstemp_mode(char *template, int mode);
6e180cdc
JH
531extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
532extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1);
f21a47b2 533
dc49cd76
SP
534static inline size_t xsize_t(off_t len)
535{
46be82df
TR
536 if (len > (size_t) len)
537 die("Cannot handle files this big");
dc49cd76
SP
538 return (size_t)len;
539}
540
5bb1cda5 541static inline int has_extension(const char *filename, const char *ext)
83a2b841 542{
5bb1cda5
RS
543 size_t len = strlen(filename);
544 size_t extlen = strlen(ext);
83a2b841
RS
545 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
546}
547
f1589d10
RJ
548/* in ctype.c, for kwset users */
549extern const char tolower_trans_tbl[256];
550
4050c0df 551/* Sane ctype - no locale, and works with signed chars */
c2e9364a 552#undef isascii
4050c0df
JH
553#undef isspace
554#undef isdigit
555#undef isalpha
556#undef isalnum
0fcec2ce 557#undef isprint
43ccdf56
NK
558#undef islower
559#undef isupper
4050c0df
JH
560#undef tolower
561#undef toupper
1c149ab2
NTND
562#undef iscntrl
563#undef ispunct
564#undef isxdigit
2adf7247 565
ca5ab7d1 566extern const unsigned char sane_ctype[256];
4050c0df
JH
567#define GIT_SPACE 0x01
568#define GIT_DIGIT 0x02
569#define GIT_ALPHA 0x04
8cc32992 570#define GIT_GLOB_SPECIAL 0x08
f9b7cce6 571#define GIT_REGEX_SPECIAL 0x10
2f6c9760 572#define GIT_PATHSPEC_MAGIC 0x20
1c149ab2
NTND
573#define GIT_CNTRL 0x40
574#define GIT_PUNCT 0x80
4050c0df 575#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
c2e9364a 576#define isascii(x) (((x) & ~0x7f) == 0)
4050c0df
JH
577#define isspace(x) sane_istest(x,GIT_SPACE)
578#define isdigit(x) sane_istest(x,GIT_DIGIT)
579#define isalpha(x) sane_istest(x,GIT_ALPHA)
580#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
0fcec2ce 581#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
43ccdf56
NK
582#define islower(x) sane_iscase(x, 1)
583#define isupper(x) sane_iscase(x, 0)
8cc32992 584#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
f9b7cce6 585#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
1c149ab2
NTND
586#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
587#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
588 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
589#define isxdigit(x) (hexval_table[x] != -1)
4050c0df
JH
590#define tolower(x) sane_case((unsigned char)(x), 0x20)
591#define toupper(x) sane_case((unsigned char)(x), 0)
2f6c9760 592#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
4050c0df
JH
593
594static inline int sane_case(int x, int high)
595{
596 if (sane_istest(x, GIT_ALPHA))
597 x = (x & ~0x20) | high;
598 return x;
599}
600
43ccdf56
NK
601static inline int sane_iscase(int x, int is_lower)
602{
603 if (!sane_istest(x, GIT_ALPHA))
604 return 0;
605
606 if (is_lower)
607 return (x & 0x20) != 0;
608 else
609 return (x & 0x20) == 0;
610}
611
6aead43d
JM
612static inline int strtoul_ui(char const *s, int base, unsigned int *result)
613{
614 unsigned long ul;
615 char *p;
616
617 errno = 0;
618 ul = strtoul(s, &p, base);
619 if (errno || *p || p == s || (unsigned int) ul != ul)
620 return -1;
621 *result = ul;
622 return 0;
623}
624
7791ecbc
JH
625static inline int strtol_i(char const *s, int base, int *result)
626{
627 long ul;
628 char *p;
629
630 errno = 0;
631 ul = strtol(s, &p, base);
632 if (errno || *p || p == s || (int) ul != ul)
633 return -1;
634 *result = ul;
635 return 0;
636}
637
43fe901b
BD
638#ifdef INTERNAL_QSORT
639void git_qsort(void *base, size_t nmemb, size_t size,
640 int(*compar)(const void *, const void *));
641#define qsort git_qsort
642#endif
643
81a24b52
AR
644#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
645# define FORCE_DIR_SET_GID S_ISGID
646#else
647# define FORCE_DIR_SET_GID 0
648#endif
649
c06ff490
KB
650#ifdef NO_NSEC
651#undef USE_NSEC
652#define ST_CTIME_NSEC(st) 0
653#define ST_MTIME_NSEC(st) 0
654#else
c567383b
BG
655#ifdef USE_ST_TIMESPEC
656#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
657#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
658#else
c06ff490
KB
659#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
660#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
661#endif
c567383b 662#endif
c06ff490 663
34779c53
JS
664#ifdef UNRELIABLE_FSTAT
665#define fstat_is_reliable() 0
666#else
667#define fstat_is_reliable() 1
668#endif
669
ab8632ae 670#ifndef va_copy
26db0f2e
JN
671/*
672 * Since an obvious implementation of va_list would be to make it a
673 * pointer into the stack frame, a simple assignment will work on
674 * many systems. But let's try to be more portable.
675 */
676#ifdef __va_copy
677#define va_copy(dst, src) __va_copy(dst, src)
678#else
679#define va_copy(dst, src) ((dst) = (src))
680#endif
ab8632ae
JK
681#endif
682
fc71db39
AR
683/*
684 * Preserves errno, prints a message, but gives no warning for ENOENT.
685 * Always returns the return value of unlink(2).
686 */
687int unlink_or_warn(const char *path);
d1723296
PC
688/*
689 * Likewise for rmdir(2).
690 */
691int rmdir_or_warn(const char *path);
80d706af
PC
692/*
693 * Calls the correct function out of {unlink,rmdir}_or_warn based on
694 * the supplied file mode.
695 */
696int remove_or_warn(unsigned int mode, const char *path);
fc71db39 697
e5c52c98
JN
698/*
699 * Call access(2), but warn for any error except "missing file"
700 * (ENOENT or ENOTDIR).
701 */
ba8bd830 702int access_or_warn(const char *path, int mode);
96b9e0e3 703int access_or_die(const char *path, int mode);
ba8bd830 704
55b38a48
JH
705/* Warn on an inaccessible file that ought to be accessible */
706void warn_on_inaccessible(const char *path);
707
2f705875
JK
708/* Get the passwd entry for the UID of the current process. */
709struct passwd *xgetpwuid_self(void);
710
4050c0df 711#endif