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

#ifndef GIT_COMPAT_UTIL_H
#define GIT_COMPAT_UTIL_H

#define _FILE_OFFSET_BITS 64

#ifndef FLEX_ARRAY
#if defined(__GNUC__) && (__GNUC__ < 3)
#define FLEX_ARRAY 0
#else
#define FLEX_ARRAY /* empty */
#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__)
#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 <sys/wait.h>
#include <fnmatch.h>
#include <sys/poll.h>
#include <sys/socket.h>
#include <assert.h>
#include <regex.h>
#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

#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

#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));

#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 __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;
}

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;
}

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;
	}
}

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 prefixcmp(const char *str, const char *prefix)
{
	return strncmp(str, prefix, strlen(prefix));
}

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;
}

#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 JH	6	#ifndef FLEX_ARRAY
	7	#if defined(__GNUC__) && (__GNUC__ < 3)
	8	#define FLEX_ARRAY 0
	9	#else
	10	#define FLEX_ARRAY /* empty */
	11	#endif
	12	#endif
	13
b4f2a6ac JH	14	#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
b4f2a6ac JH	15
8723f216 NP	16	#ifdef __GNUC__
	17	#define TYPEOF(x) (__typeof__(x))
	18	#else
	19	#define TYPEOF(x)
	20	#endif
	21
	22	#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
db7244bd	23	#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
8723f216	24
cf606e3d AW	25	/* Approximation of the length of the decimal representation of this type. */
	26	#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
	27
95ca1c6c	28	#if !defined(__APPLE__) && !defined(__FreeBSD__)
85023577 JH	29	#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
85023577 JH	30	#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
c902c9a6	31	#endif
fb952206 JR	32	#define _ALL_SOURCE 1
	33	#define _GNU_SOURCE 1
	34	#define _BSD_SOURCE 1
85023577	35
4050c0df JH	36	#include <unistd.h>
	37	#include <stdio.h>
	38	#include <sys/stat.h>
	39	#include <fcntl.h>
	40	#include <stddef.h>
	41	#include <stdlib.h>
	42	#include <stdarg.h>
	43	#include <string.h>
	44	#include <errno.h>
	45	#include <limits.h>
	46	#include <sys/param.h>
4050c0df JH	47	#include <sys/types.h>
4050c0df JH	48	#include <dirent.h>
85023577 JH	49	#include <sys/time.h>
	50	#include <time.h>
	51	#include <signal.h>
	52	#include <sys/wait.h>
	53	#include <fnmatch.h>
	54	#include <sys/poll.h>
	55	#include <sys/socket.h>
	56	#include <assert.h>
	57	#include <regex.h>
	58	#include <netinet/in.h>
	59	#include <netinet/tcp.h>
	60	#include <arpa/inet.h>
	61	#include <netdb.h>
	62	#include <pwd.h>
007e2ba6	63	#include <inttypes.h>
41b20017 RJ	64	#if defined(__CYGWIN__)
	65	#undef _XOPEN_SOURCE
	66	#include <grp.h>
	67	#define _XOPEN_SOURCE 600
	68	#else
fb952206	69	#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577	70	#include <grp.h>
fb952206	71	#define _ALL_SOURCE 1
41b20017	72	#endif
85023577 JH	73
	74	#ifndef NO_ICONV
	75	#include <iconv.h>
	76	#endif
4050c0df	77
d0c2449f JH	78	/* On most systems <limits.h> would have given us this, but
	79	* not on some systems (e.g. GNU/Hurd).
	80	*/
	81	#ifndef PATH_MAX
	82	#define PATH_MAX 4096
	83	#endif
	84
c4001d92 SP	85	#ifndef PRIuMAX
	86	#define PRIuMAX "llu"
	87	#endif
	88
4050c0df JH	89	#ifdef __GNUC__
	90	#define NORETURN __attribute__((__noreturn__))
	91	#else
	92	#define NORETURN
	93	#ifndef __attribute__
	94	#define __attribute__(x)
	95	#endif
	96	#endif
	97
	98	/* General helper functions */
	99	extern void usage(const char *err) NORETURN;
	100	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
	101	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9	102	extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df	103
39a3f5ea PB	104	extern void set_usage_routine(void (routine)(const char err) NORETURN);
	105	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
	106	extern void set_error_routine(void (routine)(const char err, va_list params));
fa39b6b5	107	extern void set_warn_routine(void (routine)(const char warn, va_list params));
39a3f5ea	108
4050c0df JH	109	#ifdef NO_MMAP
	110
	111	#ifndef PROT_READ
	112	#define PROT_READ 1
	113	#define PROT_WRITE 2
	114	#define MAP_PRIVATE 1
	115	#define MAP_FAILED ((void*)-1)
	116	#endif
	117
d6779124 SP	118	#define mmap git_mmap
	119	#define munmap git_munmap
	120	extern void git_mmap(void start, size_t length, int prot, int flags, int fd, off_t offset);
	121	extern int git_munmap(void *start, size_t length);
4050c0df	122
5faaf246	123	/* This value must be multiple of (pagesize * 2) */
8c82534d SP	124	#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
8c82534d SP	125
4050c0df JH	126	#else /* NO_MMAP */
	127
	128	#include <sys/mman.h>
5faaf246 JH	129
5faaf246 JH	130	/* This value must be multiple of (pagesize * 2) */
22bac0ea SP	131	#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
	132	(sizeof(void*) >= 8 \
	133	? 1 * 1024 * 1024 * 1024 \
	134	: 32 * 1024 * 1024)
4050c0df JH	135
	136	#endif /* NO_MMAP */
	137
22bac0ea	138	#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a	139	((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d	140
6900679c SH	141	#ifdef NO_PREAD
	142	#define pread git_pread
	143	extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
	144	#endif
	145
4050c0df JH	146	#ifdef NO_SETENV
	147	#define setenv gitsetenv
	148	extern int gitsetenv(const char , const char , int);
	149	#endif
	150
ca5bb5d5 SP	151	#ifdef NO_MKDTEMP
	152	#define mkdtemp gitmkdtemp
	153	extern char gitmkdtemp(char );
	154	#endif
	155
731043fd JR	156	#ifdef NO_UNSETENV
	157	#define unsetenv gitunsetenv
	158	extern void gitunsetenv(const char *);
	159	#endif
	160
4050c0df JH	161	#ifdef NO_STRCASESTR
	162	#define strcasestr gitstrcasestr
	163	extern char gitstrcasestr(const char haystack, const char *needle);
	164	#endif
	165
817151e6 PE	166	#ifdef NO_STRLCPY
	167	#define strlcpy gitstrlcpy
	168	extern size_t gitstrlcpy(char , const char , size_t);
	169	#endif
	170
bc6b4f52 JR	171	#ifdef NO_STRTOUMAX
	172	#define strtoumax gitstrtoumax
	173	extern uintmax_t gitstrtoumax(const char , char *, int);
	174	#endif
	175
fa0c87c3 AR	176	#ifdef NO_HSTRERROR
	177	#define hstrerror githstrerror
	178	extern const char *githstrerror(int herror);
	179	#endif
	180
b21b9f1d RS	181	#ifdef NO_MEMMEM
	182	#define memmem gitmemmem
	183	void gitmemmem(const void haystack, size_t haystacklen,
	184	const void *needle, size_t needlelen);
	185	#endif
	186
726c8ef5 JS	187	#ifdef __GLIBC_PREREQ
	188	#if __GLIBC_PREREQ(2, 1)
	189	#define HAVE_STRCHRNUL
	190	#endif
	191	#endif
	192
	193	#ifndef HAVE_STRCHRNUL
659c69cf	194	#define strchrnul gitstrchrnul
9e79f00f AE	195	static inline char gitstrchrnul(const char s, int c)
	196	{
	197	while (s && s != c)
	198	s++;
	199	return (char *)s;
	200	}
659c69cf RS	201	#endif
659c69cf RS	202
d1efefa4	203	extern void release_pack_memory(size_t, int);
97bfeb34	204
9befac47 SP	205	static inline char* xstrdup(const char *str)
	206	{
	207	char *ret = strdup(str);
97bfeb34	208	if (!ret) {
d1efefa4	209	release_pack_memory(strlen(str) + 1, -1);
97bfeb34 SP	210	ret = strdup(str);
	211	if (!ret)
	212	die("Out of memory, strdup failed");
	213	}
9befac47 SP	214	return ret;
	215	}
	216
4050c0df JH	217	static inline void *xmalloc(size_t size)
	218	{
	219	void *ret = malloc(size);
4e7a2ecc JH	220	if (!ret && !size)
4e7a2ecc JH	221	ret = malloc(1);
97bfeb34	222	if (!ret) {
d1efefa4	223	release_pack_memory(size, -1);
97bfeb34 SP	224	ret = malloc(size);
	225	if (!ret && !size)
	226	ret = malloc(1);
	227	if (!ret)
	228	die("Out of memory, malloc failed");
	229	}
aa5481c1 JH	230	#ifdef XMALLOC_POISON
	231	memset(ret, 0xA5, size);
	232	#endif
4050c0df JH	233	return ret;
	234	}
	235
68d3025a	236	static inline void xmemdupz(const void data, size_t len)
5094102e	237	{
68d3025a PH	238	char *p = xmalloc(len + 1);
68d3025a PH	239	memcpy(p, data, len);
5094102e DB	240	p[len] = '\0';
	241	return p;
	242	}
	243
68d3025a PH	244	static inline char xstrndup(const char str, size_t len)
	245	{
	246	char *p = memchr(str, '\0', len);
	247	return xmemdupz(str, p ? p - str : len);
	248	}
	249
4050c0df JH	250	static inline void xrealloc(void ptr, size_t size)
	251	{
	252	void *ret = realloc(ptr, size);
4e7a2ecc JH	253	if (!ret && !size)
4e7a2ecc JH	254	ret = realloc(ptr, 1);
97bfeb34	255	if (!ret) {
d1efefa4	256	release_pack_memory(size, -1);
97bfeb34 SP	257	ret = realloc(ptr, size);
	258	if (!ret && !size)
	259	ret = realloc(ptr, 1);
	260	if (!ret)
	261	die("Out of memory, realloc failed");
	262	}
4050c0df JH	263	return ret;
	264	}
	265
	266	static inline void *xcalloc(size_t nmemb, size_t size)
	267	{
	268	void *ret = calloc(nmemb, size);
4e7a2ecc JH	269	if (!ret && (!nmemb \|\| !size))
4e7a2ecc JH	270	ret = calloc(1, 1);
97bfeb34	271	if (!ret) {
d1efefa4	272	release_pack_memory(nmemb * size, -1);
97bfeb34 SP	273	ret = calloc(nmemb, size);
	274	if (!ret && (!nmemb \|\| !size))
	275	ret = calloc(1, 1);
	276	if (!ret)
	277	die("Out of memory, calloc failed");
	278	}
4050c0df JH	279	return ret;
	280	}
	281
c4712e45 SP	282	static inline void xmmap(void start, size_t length,
	283	int prot, int flags, int fd, off_t offset)
	284	{
	285	void *ret = mmap(start, length, prot, flags, fd, offset);
	286	if (ret == MAP_FAILED) {
9130ac1e LT	287	if (!length)
9130ac1e LT	288	return NULL;
d1efefa4	289	release_pack_memory(length, fd);
c4712e45 SP	290	ret = mmap(start, length, prot, flags, fd, offset);
	291	if (ret == MAP_FAILED)
	292	die("Out of memory? mmap failed: %s", strerror(errno));
	293	}
	294	return ret;
	295	}
	296
1c15afb9 JH	297	static inline ssize_t xread(int fd, void *buf, size_t len)
	298	{
	299	ssize_t nr;
	300	while (1) {
	301	nr = read(fd, buf, len);
	302	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	303	continue;
	304	return nr;
	305	}
	306	}
	307
	308	static inline ssize_t xwrite(int fd, const void *buf, size_t len)
	309	{
	310	ssize_t nr;
	311	while (1) {
	312	nr = write(fd, buf, len);
	313	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	314	continue;
	315	return nr;
	316	}
	317	}
	318
f5788250 JM	319	static inline int xdup(int fd)
	320	{
	321	int ret = dup(fd);
	322	if (ret < 0)
	323	die("dup failed: %s", strerror(errno));
	324	return ret;
	325	}
	326
	327	static inline FILE xfdopen(int fd, const char mode)
	328	{
	329	FILE *stream = fdopen(fd, mode);
	330	if (stream == NULL)
	331	die("Out of memory? fdopen failed: %s", strerror(errno));
	332	return stream;
	333	}
	334
f21a47b2 LFC	335	static inline int xmkstemp(char *template)
	336	{
	337	int fd;
	338
	339	fd = mkstemp(template);
	340	if (fd < 0)
	341	die("Unable to create temporary file: %s", strerror(errno));
	342	return fd;
	343	}
	344
dc49cd76 SP	345	static inline size_t xsize_t(off_t len)
	346	{
	347	return (size_t)len;
	348	}
	349
5bb1cda5	350	static inline int has_extension(const char filename, const char ext)
83a2b841	351	{
5bb1cda5 RS	352	size_t len = strlen(filename);
5bb1cda5 RS	353	size_t extlen = strlen(ext);
83a2b841 RS	354	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	355	}
	356
4050c0df JH	357	/* Sane ctype - no locale, and works with signed chars */
	358	#undef isspace
	359	#undef isdigit
	360	#undef isalpha
	361	#undef isalnum
	362	#undef tolower
	363	#undef toupper
	364	extern unsigned char sane_ctype[256];
	365	#define GIT_SPACE 0x01
	366	#define GIT_DIGIT 0x02
	367	#define GIT_ALPHA 0x04
	368	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	369	#define isspace(x) sane_istest(x,GIT_SPACE)
	370	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	371	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	372	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
	373	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	374	#define toupper(x) sane_case((unsigned char)(x), 0)
	375
	376	static inline int sane_case(int x, int high)
	377	{
	378	if (sane_istest(x, GIT_ALPHA))
	379	x = (x & ~0x20) \| high;
	380	return x;
	381	}
	382
cff0302c JH	383	static inline int prefixcmp(const char str, const char prefix)
	384	{
	385	return strncmp(str, prefix, strlen(prefix));
	386	}
	387
6aead43d JM	388	static inline int strtoul_ui(char const s, int base, unsigned int result)
	389	{
	390	unsigned long ul;
	391	char *p;
	392
	393	errno = 0;
	394	ul = strtoul(s, &p, base);
	395	if (errno \|\| *p \|\| p == s \|\| (unsigned int) ul != ul)
	396	return -1;
	397	*result = ul;
	398	return 0;
	399	}
	400
7791ecbc JH	401	static inline int strtol_i(char const s, int base, int result)
	402	{
	403	long ul;
	404	char *p;
	405
	406	errno = 0;
	407	ul = strtol(s, &p, base);
	408	if (errno \|\| *p \|\| p == s \|\| (int) ul != ul)
	409	return -1;
	410	*result = ul;
	411	return 0;
	412	}
	413
4050c0df	414	#endif