[thirdparty/git.git] / git-compat-util.h

#ifndef GIT_COMPAT_UTIL_H
#define GIT_COMPAT_UTIL_H

#define _FILE_OFFSET_BITS 64

#ifndef FLEX_ARRAY
/*
 * See if our compiler is known to support flexible array members.
 */
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
# define FLEX_ARRAY /* empty */
#elif defined(__GNUC__)
# if (__GNUC__ >= 3)
#  define FLEX_ARRAY /* empty */
# else
#  define FLEX_ARRAY 0 /* older GNU extension */
# endif
#endif

/*
 * Otherwise, default to safer but a bit wasteful traditional style
 */
#ifndef FLEX_ARRAY
# define FLEX_ARRAY 1
#endif
#endif

#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))

#ifdef __GNUC__
#define TYPEOF(x) (__typeof__(x))
#else
#define TYPEOF(x)
#endif

#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
#define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */

/* Approximation of the length of the decimal representation of this type. */
#define decimal_length(x)	((int)(sizeof(x) * 2.56 + 0.5) + 1)

#if !defined(__APPLE__) && !defined(__FreeBSD__)  && !defined(__USLC__) && !defined(_M_UNIX)
#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
#endif
#define _ALL_SOURCE 1
#define _GNU_SOURCE 1
#define _BSD_SOURCE 1

#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/time.h>
#include <time.h>
#include <signal.h>
#include <fnmatch.h>
#include <assert.h>
#include <regex.h>
#include <utime.h>
#ifndef __MINGW32__
#include <sys/wait.h>
#include <sys/poll.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#ifndef NO_SYS_SELECT_H
#include <sys/select.h>
#endif
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <pwd.h>
#include <inttypes.h>
#if defined(__CYGWIN__)
#undef _XOPEN_SOURCE
#include <grp.h>
#define _XOPEN_SOURCE 600
#else
#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
#include <grp.h>
#define _ALL_SOURCE 1
#endif
#else 	/* __MINGW32__ */
/* pull in Windows compatibility stuff */
#include "compat/mingw.h"
#endif	/* __MINGW32__ */

#ifndef NO_ICONV
#include <iconv.h>
#endif

/* On most systems <limits.h> would have given us this, but
 * not on some systems (e.g. GNU/Hurd).
 */
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif

#ifndef PRIuMAX
#define PRIuMAX "llu"
#endif

#ifndef PATH_SEP
#define PATH_SEP ':'
#endif

#ifndef STRIP_EXTENSION
#define STRIP_EXTENSION ""
#endif

#ifndef has_dos_drive_prefix
#define has_dos_drive_prefix(path) 0
#endif

#ifndef is_dir_sep
#define is_dir_sep(c) ((c) == '/')
#endif

#ifdef __GNUC__
#define NORETURN __attribute__((__noreturn__))
#else
#define NORETURN
#ifndef __attribute__
#define __attribute__(x)
#endif
#endif

/* General helper functions */
extern void usage(const char *err) NORETURN;
extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));

extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
extern void set_error_routine(void (*routine)(const char *err, va_list params));
extern void set_warn_routine(void (*routine)(const char *warn, va_list params));

extern int prefixcmp(const char *str, const char *prefix);
extern time_t tm_to_time_t(const struct tm *tm);

#ifdef NO_MMAP

#ifndef PROT_READ
#define PROT_READ 1
#define PROT_WRITE 2
#define MAP_PRIVATE 1
#define MAP_FAILED ((void*)-1)
#endif

#define mmap git_mmap
#define munmap git_munmap
extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
extern int git_munmap(void *start, size_t length);

/* This value must be multiple of (pagesize * 2) */
#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)

#else /* NO_MMAP */

#include <sys/mman.h>

/* This value must be multiple of (pagesize * 2) */
#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	(sizeof(void*) >= 8 \
		?  1 * 1024 * 1024 * 1024 \
		: 32 * 1024 * 1024)

#endif /* NO_MMAP */

#define DEFAULT_PACKED_GIT_LIMIT \
	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))

#ifdef NO_PREAD
#define pread git_pread
extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
#endif

#ifdef NO_SETENV
#define setenv gitsetenv
extern int gitsetenv(const char *, const char *, int);
#endif

#ifdef NO_MKDTEMP
#define mkdtemp gitmkdtemp
extern char *gitmkdtemp(char *);
#endif

#ifdef NO_UNSETENV
#define unsetenv gitunsetenv
extern void gitunsetenv(const char *);
#endif

#ifdef NO_STRCASESTR
#define strcasestr gitstrcasestr
extern char *gitstrcasestr(const char *haystack, const char *needle);
#endif

#ifdef NO_STRLCPY
#define strlcpy gitstrlcpy
extern size_t gitstrlcpy(char *, const char *, size_t);
#endif

#ifdef NO_STRTOUMAX
#define strtoumax gitstrtoumax
extern uintmax_t gitstrtoumax(const char *, char **, int);
#endif

#ifdef NO_HSTRERROR
#define hstrerror githstrerror
extern const char *githstrerror(int herror);
#endif

#ifdef NO_MEMMEM
#define memmem gitmemmem
void *gitmemmem(const void *haystack, size_t haystacklen,
                const void *needle, size_t needlelen);
#endif

#ifdef FREAD_READS_DIRECTORIES
#ifdef fopen
#undef fopen
#endif
#define fopen(a,b) git_fopen(a,b)
extern FILE *git_fopen(const char*, const char*);
#endif

#ifdef SNPRINTF_RETURNS_BOGUS
#define snprintf git_snprintf
extern int git_snprintf(char *str, size_t maxsize,
			const char *format, ...);
#define vsnprintf git_vsnprintf
extern int git_vsnprintf(char *str, size_t maxsize,
			 const char *format, va_list ap);
#endif

#ifdef __GLIBC_PREREQ
#if __GLIBC_PREREQ(2, 1)
#define HAVE_STRCHRNUL
#endif
#endif

#ifndef HAVE_STRCHRNUL
#define strchrnul gitstrchrnul
static inline char *gitstrchrnul(const char *s, int c)
{
	while (*s && *s != c)
		s++;
	return (char *)s;
}
#endif

extern void release_pack_memory(size_t, int);

static inline char* xstrdup(const char *str)
{
	char *ret = strdup(str);
	if (!ret) {
		release_pack_memory(strlen(str) + 1, -1);
		ret = strdup(str);
		if (!ret)
			die("Out of memory, strdup failed");
	}
	return ret;
}

static inline void *xmalloc(size_t size)
{
	void *ret = malloc(size);
	if (!ret && !size)
		ret = malloc(1);
	if (!ret) {
		release_pack_memory(size, -1);
		ret = malloc(size);
		if (!ret && !size)
			ret = malloc(1);
		if (!ret)
			die("Out of memory, malloc failed");
	}
#ifdef XMALLOC_POISON
	memset(ret, 0xA5, size);
#endif
	return ret;
}

/*
 * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
 * "data" to the allocated memory, zero terminates the allocated memory,
 * and returns a pointer to the allocated memory. If the allocation fails,
 * the program dies.
 */
static inline void *xmemdupz(const void *data, size_t len)
{
	char *p = xmalloc(len + 1);
	memcpy(p, data, len);
	p[len] = '\0';
	return p;
}

static inline char *xstrndup(const char *str, size_t len)
{
	char *p = memchr(str, '\0', len);
	return xmemdupz(str, p ? p - str : len);
}

static inline void *xrealloc(void *ptr, size_t size)
{
	void *ret = realloc(ptr, size);
	if (!ret && !size)
		ret = realloc(ptr, 1);
	if (!ret) {
		release_pack_memory(size, -1);
		ret = realloc(ptr, size);
		if (!ret && !size)
			ret = realloc(ptr, 1);
		if (!ret)
			die("Out of memory, realloc failed");
	}
	return ret;
}

static inline void *xcalloc(size_t nmemb, size_t size)
{
	void *ret = calloc(nmemb, size);
	if (!ret && (!nmemb || !size))
		ret = calloc(1, 1);
	if (!ret) {
		release_pack_memory(nmemb * size, -1);
		ret = calloc(nmemb, size);
		if (!ret && (!nmemb || !size))
			ret = calloc(1, 1);
		if (!ret)
			die("Out of memory, calloc failed");
	}
	return ret;
}

static inline void *xmmap(void *start, size_t length,
	int prot, int flags, int fd, off_t offset)
{
	void *ret = mmap(start, length, prot, flags, fd, offset);
	if (ret == MAP_FAILED) {
		if (!length)
			return NULL;
		release_pack_memory(length, fd);
		ret = mmap(start, length, prot, flags, fd, offset);
		if (ret == MAP_FAILED)
			die("Out of memory? mmap failed: %s", strerror(errno));
	}
	return ret;
}

/*
 * xread() is the same a read(), but it automatically restarts read()
 * operations with a recoverable error (EAGAIN and EINTR). xread()
 * DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
 */
static inline ssize_t xread(int fd, void *buf, size_t len)
{
	ssize_t nr;
	while (1) {
		nr = read(fd, buf, len);
		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
			continue;
		return nr;
	}
}

/*
 * xwrite() is the same a write(), but it automatically restarts write()
 * operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
 * GUARANTEE that "len" bytes is written even if the operation is successful.
 */
static inline ssize_t xwrite(int fd, const void *buf, size_t len)
{
	ssize_t nr;
	while (1) {
		nr = write(fd, buf, len);
		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
			continue;
		return nr;
	}
}

static inline int xdup(int fd)
{
	int ret = dup(fd);
	if (ret < 0)
		die("dup failed: %s", strerror(errno));
	return ret;
}

static inline FILE *xfdopen(int fd, const char *mode)
{
	FILE *stream = fdopen(fd, mode);
	if (stream == NULL)
		die("Out of memory? fdopen failed: %s", strerror(errno));
	return stream;
}

static inline int xmkstemp(char *template)
{
	int fd;

	fd = mkstemp(template);
	if (fd < 0)
		die("Unable to create temporary file: %s", strerror(errno));
	return fd;
}

static inline size_t xsize_t(off_t len)
{
	return (size_t)len;
}

static inline int has_extension(const char *filename, const char *ext)
{
	size_t len = strlen(filename);
	size_t extlen = strlen(ext);
	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
}

/* Sane ctype - no locale, and works with signed chars */
#undef isspace
#undef isdigit
#undef isalpha
#undef isalnum
#undef tolower
#undef toupper
extern unsigned char sane_ctype[256];
#define GIT_SPACE 0x01
#define GIT_DIGIT 0x02
#define GIT_ALPHA 0x04
#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
#define isspace(x) sane_istest(x,GIT_SPACE)
#define isdigit(x) sane_istest(x,GIT_DIGIT)
#define isalpha(x) sane_istest(x,GIT_ALPHA)
#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
#define tolower(x) sane_case((unsigned char)(x), 0x20)
#define toupper(x) sane_case((unsigned char)(x), 0)

static inline int sane_case(int x, int high)
{
	if (sane_istest(x, GIT_ALPHA))
		x = (x & ~0x20) | high;
	return x;
}

static inline int strtoul_ui(char const *s, int base, unsigned int *result)
{
	unsigned long ul;
	char *p;

	errno = 0;
	ul = strtoul(s, &p, base);
	if (errno || *p || p == s || (unsigned int) ul != ul)
		return -1;
	*result = ul;
	return 0;
}

static inline int strtol_i(char const *s, int base, int *result)
{
	long ul;
	char *p;

	errno = 0;
	ul = strtol(s, &p, base);
	if (errno || *p || p == s || (int) ul != ul)
		return -1;
	*result = ul;
	return 0;
}

#ifdef INTERNAL_QSORT
void git_qsort(void *base, size_t nmemb, size_t size,
	       int(*compar)(const void *, const void *));
#define qsort git_qsort
#endif

#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
# define FORCE_DIR_SET_GID S_ISGID
#else
# define FORCE_DIR_SET_GID 0
#endif

#endif
Commit	Line	Data
4050c0df JH	1	#ifndef GIT_COMPAT_UTIL_H
	2	#define GIT_COMPAT_UTIL_H
	3
b97e9116 MW	4	#define _FILE_OFFSET_BITS 64
b97e9116 MW	5
8f1d2e6f	6	#ifndef FLEX_ARRAY
8e973991 JH	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
8f1d2e6f JH	25	#endif
	26	#endif
	27
b4f2a6ac JH	28	#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
b4f2a6ac JH	29
8723f216 NP	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))))
db7244bd	37	#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
8723f216	38
cf606e3d AW	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
457bb452	42	#if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX)
85023577 JH	43	#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
85023577 JH	44	#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
c902c9a6	45	#endif
fb952206 JR	46	#define _ALL_SOURCE 1
	47	#define _GNU_SOURCE 1
	48	#define _BSD_SOURCE 1
85023577	49
4050c0df JH	50	#include <unistd.h>
	51	#include <stdio.h>
	52	#include <sys/stat.h>
	53	#include <fcntl.h>
	54	#include <stddef.h>
	55	#include <stdlib.h>
	56	#include <stdarg.h>
	57	#include <string.h>
	58	#include <errno.h>
	59	#include <limits.h>
	60	#include <sys/param.h>
4050c0df JH	61	#include <sys/types.h>
4050c0df JH	62	#include <dirent.h>
85023577 JH	63	#include <sys/time.h>
	64	#include <time.h>
	65	#include <signal.h>
85023577	66	#include <fnmatch.h>
f4626df5 JS	67	#include <assert.h>
	68	#include <regex.h>
	69	#include <utime.h>
	70	#ifndef __MINGW32__
	71	#include <sys/wait.h>
85023577 JH	72	#include <sys/poll.h>
85023577 JH	73	#include <sys/socket.h>
80bbe72b	74	#include <sys/ioctl.h>
2600973f	75	#ifndef NO_SYS_SELECT_H
80bbe72b	76	#include <sys/select.h>
2600973f	77	#endif
85023577 JH	78	#include <netinet/in.h>
	79	#include <netinet/tcp.h>
	80	#include <arpa/inet.h>
	81	#include <netdb.h>
	82	#include <pwd.h>
007e2ba6	83	#include <inttypes.h>
41b20017 RJ	84	#if defined(__CYGWIN__)
	85	#undef _XOPEN_SOURCE
	86	#include <grp.h>
	87	#define _XOPEN_SOURCE 600
	88	#else
fb952206	89	#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577	90	#include <grp.h>
fb952206	91	#define _ALL_SOURCE 1
41b20017	92	#endif
f4626df5 JS	93	#else /* __MINGW32__ */
	94	/* pull in Windows compatibility stuff */
	95	#include "compat/mingw.h"
	96	#endif /* __MINGW32__ */
85023577 JH	97
	98	#ifndef NO_ICONV
	99	#include <iconv.h>
	100	#endif
4050c0df	101
d0c2449f JH	102	/* On most systems <limits.h> would have given us this, but
	103	* not on some systems (e.g. GNU/Hurd).
	104	*/
	105	#ifndef PATH_MAX
	106	#define PATH_MAX 4096
	107	#endif
	108
c4001d92 SP	109	#ifndef PRIuMAX
	110	#define PRIuMAX "llu"
	111	#endif
	112
80ba074f JS	113	#ifndef PATH_SEP
	114	#define PATH_SEP ':'
	115	#endif
	116
23326d14 JS	117	#ifndef STRIP_EXTENSION
	118	#define STRIP_EXTENSION ""
	119	#endif
	120
25fe217b JS	121	#ifndef has_dos_drive_prefix
	122	#define has_dos_drive_prefix(path) 0
	123	#endif
	124
	125	#ifndef is_dir_sep
	126	#define is_dir_sep(c) ((c) == '/')
	127	#endif
	128
4050c0df JH	129	#ifdef __GNUC__
	130	#define NORETURN __attribute__((__noreturn__))
	131	#else
	132	#define NORETURN
	133	#ifndef __attribute__
	134	#define __attribute__(x)
	135	#endif
	136	#endif
	137
	138	/* General helper functions */
	139	extern void usage(const char *err) NORETURN;
	140	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
	141	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9	142	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df	143
39a3f5ea PB	144	extern void set_usage_routine(void (routine)(const char err) NORETURN);
	145	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
	146	extern void set_error_routine(void (routine)(const char err, va_list params));
fa39b6b5	147	extern void set_warn_routine(void (routine)(const char warn, va_list params));
39a3f5ea	148
698a68be	149	extern int prefixcmp(const char str, const char prefix);
bb5799d6	150	extern time_t tm_to_time_t(const struct tm *tm);
698a68be	151
4050c0df JH	152	#ifdef NO_MMAP
	153
	154	#ifndef PROT_READ
	155	#define PROT_READ 1
	156	#define PROT_WRITE 2
	157	#define MAP_PRIVATE 1
	158	#define MAP_FAILED ((void*)-1)
	159	#endif
	160
d6779124 SP	161	#define mmap git_mmap
	162	#define munmap git_munmap
	163	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	164	extern int git_munmap(void *start, size_t length);
4050c0df	165
5faaf246	166	/* This value must be multiple of (pagesize * 2) */
8c82534d SP	167	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
8c82534d SP	168
4050c0df JH	169	#else /* NO_MMAP */
	170
	171	#include <sys/mman.h>
5faaf246 JH	172
5faaf246 JH	173	/* This value must be multiple of (pagesize * 2) */
22bac0ea SP	174	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	175	(sizeof(void*) >= 8 \
	176	? 1 * 1024 * 1024 * 1024 \
	177	: 32 * 1024 * 1024)
4050c0df JH	178
	179	#endif /* NO_MMAP */
	180
22bac0ea	181	#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a	182	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d	183
6900679c SH	184	#ifdef NO_PREAD
	185	#define pread git_pread
	186	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	187	#endif
	188
4050c0df JH	189	#ifdef NO_SETENV
	190	#define setenv gitsetenv
	191	extern int gitsetenv(const char , const char , int);
	192	#endif
	193
ca5bb5d5 SP	194	#ifdef NO_MKDTEMP
	195	#define mkdtemp gitmkdtemp
	196	extern char gitmkdtemp(char );
	197	#endif
	198
731043fd JR	199	#ifdef NO_UNSETENV
	200	#define unsetenv gitunsetenv
	201	extern void gitunsetenv(const char *);
	202	#endif
	203
4050c0df JH	204	#ifdef NO_STRCASESTR
	205	#define strcasestr gitstrcasestr
	206	extern char gitstrcasestr(const char haystack, const char *needle);
	207	#endif
	208
817151e6 PE	209	#ifdef NO_STRLCPY
	210	#define strlcpy gitstrlcpy
	211	extern size_t gitstrlcpy(char , const char , size_t);
	212	#endif
	213
bc6b4f52 JR	214	#ifdef NO_STRTOUMAX
	215	#define strtoumax gitstrtoumax
	216	extern uintmax_t gitstrtoumax(const char , char *, int);
	217	#endif
	218
fa0c87c3 AR	219	#ifdef NO_HSTRERROR
	220	#define hstrerror githstrerror
	221	extern const char *githstrerror(int herror);
	222	#endif
	223
b21b9f1d RS	224	#ifdef NO_MEMMEM
	225	#define memmem gitmemmem
	226	void gitmemmem(const void haystack, size_t haystacklen,
	227	const void *needle, size_t needlelen);
	228	#endif
	229
cba22528	230	#ifdef FREAD_READS_DIRECTORIES
c5445fe0 JS	231	#ifdef fopen
	232	#undef fopen
	233	#endif
cba22528 BC	234	#define fopen(a,b) git_fopen(a,b)
	235	extern FILE git_fopen(const char, const char*);
	236	#endif
	237
c4582f93 MR	238	#ifdef SNPRINTF_RETURNS_BOGUS
	239	#define snprintf git_snprintf
	240	extern int git_snprintf(char *str, size_t maxsize,
	241	const char *format, ...);
	242	#define vsnprintf git_vsnprintf
	243	extern int git_vsnprintf(char *str, size_t maxsize,
	244	const char *format, va_list ap);
	245	#endif
	246
726c8ef5 JS	247	#ifdef __GLIBC_PREREQ
	248	#if __GLIBC_PREREQ(2, 1)
	249	#define HAVE_STRCHRNUL
	250	#endif
	251	#endif
	252
	253	#ifndef HAVE_STRCHRNUL
659c69cf	254	#define strchrnul gitstrchrnul
9e79f00f AE	255	static inline char gitstrchrnul(const char s, int c)
	256	{
	257	while (s && s != c)
	258	s++;
	259	return (char *)s;
	260	}
659c69cf RS	261	#endif
659c69cf RS	262
d1efefa4	263	extern void release_pack_memory(size_t, int);
97bfeb34	264
9befac47 SP	265	static inline char* xstrdup(const char *str)
	266	{
	267	char *ret = strdup(str);
97bfeb34	268	if (!ret) {
d1efefa4	269	release_pack_memory(strlen(str) + 1, -1);
97bfeb34 SP	270	ret = strdup(str);
	271	if (!ret)
	272	die("Out of memory, strdup failed");
	273	}
9befac47 SP	274	return ret;
	275	}
	276
4050c0df JH	277	static inline void *xmalloc(size_t size)
	278	{
	279	void *ret = malloc(size);
4e7a2ecc JH	280	if (!ret && !size)
4e7a2ecc JH	281	ret = malloc(1);
97bfeb34	282	if (!ret) {
d1efefa4	283	release_pack_memory(size, -1);
97bfeb34 SP	284	ret = malloc(size);
	285	if (!ret && !size)
	286	ret = malloc(1);
	287	if (!ret)
	288	die("Out of memory, malloc failed");
	289	}
aa5481c1 JH	290	#ifdef XMALLOC_POISON
	291	memset(ret, 0xA5, size);
	292	#endif
4050c0df JH	293	return ret;
	294	}
	295
e8729f53 HO	296	/*
	297	* xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of
	298	* "data" to the allocated memory, zero terminates the allocated memory,
	299	* and returns a pointer to the allocated memory. If the allocation fails,
	300	* the program dies.
	301	*/
68d3025a	302	static inline void xmemdupz(const void data, size_t len)
5094102e	303	{
68d3025a PH	304	char *p = xmalloc(len + 1);
68d3025a PH	305	memcpy(p, data, len);
5094102e DB	306	p[len] = '\0';
	307	return p;
	308	}
	309
68d3025a PH	310	static inline char xstrndup(const char str, size_t len)
	311	{
	312	char *p = memchr(str, '\0', len);
	313	return xmemdupz(str, p ? p - str : len);
	314	}
	315
4050c0df JH	316	static inline void xrealloc(void ptr, size_t size)
	317	{
	318	void *ret = realloc(ptr, size);
4e7a2ecc JH	319	if (!ret && !size)
4e7a2ecc JH	320	ret = realloc(ptr, 1);
97bfeb34	321	if (!ret) {
d1efefa4	322	release_pack_memory(size, -1);
97bfeb34 SP	323	ret = realloc(ptr, size);
	324	if (!ret && !size)
	325	ret = realloc(ptr, 1);
	326	if (!ret)
	327	die("Out of memory, realloc failed");
	328	}
4050c0df JH	329	return ret;
	330	}
	331
	332	static inline void *xcalloc(size_t nmemb, size_t size)
	333	{
	334	void *ret = calloc(nmemb, size);
4e7a2ecc JH	335	if (!ret && (!nmemb \|\| !size))
4e7a2ecc JH	336	ret = calloc(1, 1);
97bfeb34	337	if (!ret) {
d1efefa4	338	release_pack_memory(nmemb * size, -1);
97bfeb34 SP	339	ret = calloc(nmemb, size);
	340	if (!ret && (!nmemb \|\| !size))
	341	ret = calloc(1, 1);
	342	if (!ret)
	343	die("Out of memory, calloc failed");
	344	}
4050c0df JH	345	return ret;
	346	}
	347
c4712e45 SP	348	static inline void xmmap(void start, size_t length,
	349	int prot, int flags, int fd, off_t offset)
	350	{
	351	void *ret = mmap(start, length, prot, flags, fd, offset);
	352	if (ret == MAP_FAILED) {
9130ac1e LT	353	if (!length)
9130ac1e LT	354	return NULL;
d1efefa4	355	release_pack_memory(length, fd);
c4712e45 SP	356	ret = mmap(start, length, prot, flags, fd, offset);
	357	if (ret == MAP_FAILED)
	358	die("Out of memory? mmap failed: %s", strerror(errno));
	359	}
	360	return ret;
	361	}
	362
e8729f53 HO	363	/*
	364	* xread() is the same a read(), but it automatically restarts read()
	365	* operations with a recoverable error (EAGAIN and EINTR). xread()
	366	* DOES NOT GUARANTEE that "len" bytes is read even if the data is available.
	367	*/
1c15afb9 JH	368	static inline ssize_t xread(int fd, void *buf, size_t len)
	369	{
	370	ssize_t nr;
	371	while (1) {
	372	nr = read(fd, buf, len);
	373	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	374	continue;
	375	return nr;
	376	}
	377	}
	378
e8729f53 HO	379	/*
	380	* xwrite() is the same a write(), but it automatically restarts write()
	381	* operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT
	382	* GUARANTEE that "len" bytes is written even if the operation is successful.
	383	*/
1c15afb9 JH	384	static inline ssize_t xwrite(int fd, const void *buf, size_t len)
	385	{
	386	ssize_t nr;
	387	while (1) {
	388	nr = write(fd, buf, len);
	389	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	390	continue;
	391	return nr;
	392	}
	393	}
	394
f5788250 JM	395	static inline int xdup(int fd)
	396	{
	397	int ret = dup(fd);
	398	if (ret < 0)
	399	die("dup failed: %s", strerror(errno));
	400	return ret;
	401	}
	402
	403	static inline FILE xfdopen(int fd, const char mode)
	404	{
	405	FILE *stream = fdopen(fd, mode);
	406	if (stream == NULL)
	407	die("Out of memory? fdopen failed: %s", strerror(errno));
	408	return stream;
	409	}
	410
f21a47b2 LFC	411	static inline int xmkstemp(char *template)
	412	{
	413	int fd;
	414
	415	fd = mkstemp(template);
	416	if (fd < 0)
	417	die("Unable to create temporary file: %s", strerror(errno));
	418	return fd;
	419	}
	420
dc49cd76 SP	421	static inline size_t xsize_t(off_t len)
	422	{
	423	return (size_t)len;
	424	}
	425
5bb1cda5	426	static inline int has_extension(const char filename, const char ext)
83a2b841	427	{
5bb1cda5 RS	428	size_t len = strlen(filename);
5bb1cda5 RS	429	size_t extlen = strlen(ext);
83a2b841 RS	430	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	431	}
	432
4050c0df JH	433	/* Sane ctype - no locale, and works with signed chars */
	434	#undef isspace
	435	#undef isdigit
	436	#undef isalpha
	437	#undef isalnum
	438	#undef tolower
	439	#undef toupper
	440	extern unsigned char sane_ctype[256];
	441	#define GIT_SPACE 0x01
	442	#define GIT_DIGIT 0x02
	443	#define GIT_ALPHA 0x04
	444	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	445	#define isspace(x) sane_istest(x,GIT_SPACE)
	446	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	447	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	448	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
	449	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	450	#define toupper(x) sane_case((unsigned char)(x), 0)
	451
	452	static inline int sane_case(int x, int high)
	453	{
	454	if (sane_istest(x, GIT_ALPHA))
	455	x = (x & ~0x20) \| high;
	456	return x;
	457	}
	458
6aead43d JM	459	static inline int strtoul_ui(char const s, int base, unsigned int result)
	460	{
	461	unsigned long ul;
	462	char *p;
	463
	464	errno = 0;
	465	ul = strtoul(s, &p, base);
	466	if (errno \|\| *p \|\| p == s \|\| (unsigned int) ul != ul)
	467	return -1;
	468	*result = ul;
	469	return 0;
	470	}
	471
7791ecbc JH	472	static inline int strtol_i(char const s, int base, int result)
	473	{
	474	long ul;
	475	char *p;
	476
	477	errno = 0;
	478	ul = strtol(s, &p, base);
	479	if (errno \|\| *p \|\| p == s \|\| (int) ul != ul)
	480	return -1;
	481	*result = ul;
	482	return 0;
	483	}
	484
43fe901b BD	485	#ifdef INTERNAL_QSORT
	486	void git_qsort(void *base, size_t nmemb, size_t size,
	487	int(compar)(const void , const void *));
	488	#define qsort git_qsort
	489	#endif
	490
81a24b52 AR	491	#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
	492	# define FORCE_DIR_SET_GID S_ISGID
	493	#else
	494	# define FORCE_DIR_SET_GID 0
	495	#endif
	496
4050c0df	497	#endif