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

#ifndef GIT_COMPAT_UTIL_H
#define GIT_COMPAT_UTIL_H

#ifndef FLEX_ARRAY
#if defined(__GNUC__) && (__GNUC__ < 3)
#define FLEX_ARRAY 0
#else
#define FLEX_ARRAY /* empty */
#endif
#endif

#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 <netinet/in.h>
#include <sys/types.h>
#include <dirent.h>

#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)));

#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 gitfakemmap
#define munmap gitfakemunmap
extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
extern int gitfakemunmap(void *start, size_t length);

#else /* NO_MMAP */

#include <sys/mman.h>

#endif /* NO_MMAP */

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

static inline void *xmalloc(size_t size)
{
	void *ret = malloc(size);
	if (!ret && !size)
		ret = malloc(1);
	if (!ret)
		die("Out of memory, malloc failed");
	return ret;
}

static inline void *xrealloc(void *ptr, size_t size)
{
	void *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)
		die("Out of memory, calloc failed");
	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;
	}
}

/* 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;
}

#ifndef MAXPATHLEN
#define MAXPATHLEN 256
#endif
#endif
Commit	Line	Data
4050c0df JH	1	#ifndef GIT_COMPAT_UTIL_H
	2	#define GIT_COMPAT_UTIL_H
	3
8f1d2e6f JH	4	#ifndef FLEX_ARRAY
	5	#if defined(__GNUC__) && (__GNUC__ < 3)
	6	#define FLEX_ARRAY 0
	7	#else
	8	#define FLEX_ARRAY /* empty */
	9	#endif
	10	#endif
	11
4050c0df JH	12	#include <unistd.h>
	13	#include <stdio.h>
	14	#include <sys/stat.h>
	15	#include <fcntl.h>
	16	#include <stddef.h>
	17	#include <stdlib.h>
	18	#include <stdarg.h>
	19	#include <string.h>
	20	#include <errno.h>
	21	#include <limits.h>
	22	#include <sys/param.h>
	23	#include <netinet/in.h>
	24	#include <sys/types.h>
	25	#include <dirent.h>
	26
	27	#ifdef __GNUC__
	28	#define NORETURN __attribute__((__noreturn__))
	29	#else
	30	#define NORETURN
	31	#ifndef __attribute__
	32	#define __attribute__(x)
	33	#endif
	34	#endif
	35
	36	/* General helper functions */
	37	extern void usage(const char *err) NORETURN;
	38	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
	39	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
	40
	41	#ifdef NO_MMAP
	42
	43	#ifndef PROT_READ
	44	#define PROT_READ 1
	45	#define PROT_WRITE 2
	46	#define MAP_PRIVATE 1
	47	#define MAP_FAILED ((void*)-1)
	48	#endif
	49
	50	#define mmap gitfakemmap
	51	#define munmap gitfakemunmap
	52	extern void gitfakemmap(void start, size_t length, int prot , int flags, int fd, off_t offset);
	53	extern int gitfakemunmap(void *start, size_t length);
	54
	55	#else /* NO_MMAP */
	56
	57	#include <sys/mman.h>
	58
	59	#endif /* NO_MMAP */
	60
	61	#ifdef NO_SETENV
	62	#define setenv gitsetenv
	63	extern int gitsetenv(const char , const char , int);
	64	#endif
	65
731043fd JR	66	#ifdef NO_UNSETENV
	67	#define unsetenv gitunsetenv
	68	extern void gitunsetenv(const char *);
	69	#endif
	70
4050c0df JH	71	#ifdef NO_STRCASESTR
	72	#define strcasestr gitstrcasestr
	73	extern char gitstrcasestr(const char haystack, const char *needle);
	74	#endif
	75
	76	static inline void *xmalloc(size_t size)
	77	{
	78	void *ret = malloc(size);
4e7a2ecc JH	79	if (!ret && !size)
4e7a2ecc JH	80	ret = malloc(1);
4050c0df JH	81	if (!ret)
	82	die("Out of memory, malloc failed");
	83	return ret;
	84	}
	85
	86	static inline void xrealloc(void ptr, size_t size)
	87	{
	88	void *ret = realloc(ptr, size);
4e7a2ecc JH	89	if (!ret && !size)
4e7a2ecc JH	90	ret = realloc(ptr, 1);
4050c0df JH	91	if (!ret)
	92	die("Out of memory, realloc failed");
	93	return ret;
	94	}
	95
	96	static inline void *xcalloc(size_t nmemb, size_t size)
	97	{
	98	void *ret = calloc(nmemb, size);
4e7a2ecc JH	99	if (!ret && (!nmemb \|\| !size))
4e7a2ecc JH	100	ret = calloc(1, 1);
4050c0df JH	101	if (!ret)
	102	die("Out of memory, calloc failed");
	103	return ret;
	104	}
	105
1c15afb9 JH	106	static inline ssize_t xread(int fd, void *buf, size_t len)
	107	{
	108	ssize_t nr;
	109	while (1) {
	110	nr = read(fd, buf, len);
	111	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	112	continue;
	113	return nr;
	114	}
	115	}
	116
	117	static inline ssize_t xwrite(int fd, const void *buf, size_t len)
	118	{
	119	ssize_t nr;
	120	while (1) {
	121	nr = write(fd, buf, len);
	122	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	123	continue;
	124	return nr;
	125	}
	126	}
	127
4050c0df JH	128	/* Sane ctype - no locale, and works with signed chars */
	129	#undef isspace
	130	#undef isdigit
	131	#undef isalpha
	132	#undef isalnum
	133	#undef tolower
	134	#undef toupper
	135	extern unsigned char sane_ctype[256];
	136	#define GIT_SPACE 0x01
	137	#define GIT_DIGIT 0x02
	138	#define GIT_ALPHA 0x04
	139	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	140	#define isspace(x) sane_istest(x,GIT_SPACE)
	141	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	142	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	143	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
	144	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	145	#define toupper(x) sane_case((unsigned char)(x), 0)
	146
	147	static inline int sane_case(int x, int high)
	148	{
	149	if (sane_istest(x, GIT_ALPHA))
	150	x = (x & ~0x20) \| high;
	151	return x;
	152	}
	153
252fef71 MA	154	#ifndef MAXPATHLEN
	155	#define MAXPATHLEN 256
	156	#endif
4050c0df	157	#endif