[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

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

#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
b4f2a6ac JH	12	#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
b4f2a6ac JH	13
4050c0df JH	14	#include <unistd.h>
	15	#include <stdio.h>
	16	#include <sys/stat.h>
	17	#include <fcntl.h>
	18	#include <stddef.h>
	19	#include <stdlib.h>
	20	#include <stdarg.h>
	21	#include <string.h>
	22	#include <errno.h>
	23	#include <limits.h>
	24	#include <sys/param.h>
	25	#include <netinet/in.h>
	26	#include <sys/types.h>
	27	#include <dirent.h>
	28
	29	#ifdef __GNUC__
	30	#define NORETURN __attribute__((__noreturn__))
	31	#else
	32	#define NORETURN
	33	#ifndef __attribute__
	34	#define __attribute__(x)
	35	#endif
	36	#endif
	37
	38	/* General helper functions */
	39	extern void usage(const char *err) NORETURN;
	40	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
	41	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
	42
	43	#ifdef NO_MMAP
	44
	45	#ifndef PROT_READ
	46	#define PROT_READ 1
	47	#define PROT_WRITE 2
	48	#define MAP_PRIVATE 1
	49	#define MAP_FAILED ((void*)-1)
	50	#endif
	51
	52	#define mmap gitfakemmap
	53	#define munmap gitfakemunmap
	54	extern void gitfakemmap(void start, size_t length, int prot , int flags, int fd, off_t offset);
	55	extern int gitfakemunmap(void *start, size_t length);
	56
	57	#else /* NO_MMAP */
	58
	59	#include <sys/mman.h>
	60
	61	#endif /* NO_MMAP */
	62
	63	#ifdef NO_SETENV
	64	#define setenv gitsetenv
	65	extern int gitsetenv(const char , const char , int);
	66	#endif
	67
731043fd JR	68	#ifdef NO_UNSETENV
	69	#define unsetenv gitunsetenv
	70	extern void gitunsetenv(const char *);
	71	#endif
	72
4050c0df JH	73	#ifdef NO_STRCASESTR
	74	#define strcasestr gitstrcasestr
	75	extern char gitstrcasestr(const char haystack, const char *needle);
	76	#endif
	77
	78	static inline void *xmalloc(size_t size)
	79	{
	80	void *ret = malloc(size);
4e7a2ecc JH	81	if (!ret && !size)
4e7a2ecc JH	82	ret = malloc(1);
4050c0df JH	83	if (!ret)
	84	die("Out of memory, malloc failed");
	85	return ret;
	86	}
	87
	88	static inline void xrealloc(void ptr, size_t size)
	89	{
	90	void *ret = realloc(ptr, size);
4e7a2ecc JH	91	if (!ret && !size)
4e7a2ecc JH	92	ret = realloc(ptr, 1);
4050c0df JH	93	if (!ret)
	94	die("Out of memory, realloc failed");
	95	return ret;
	96	}
	97
	98	static inline void *xcalloc(size_t nmemb, size_t size)
	99	{
	100	void *ret = calloc(nmemb, size);
4e7a2ecc JH	101	if (!ret && (!nmemb \|\| !size))
4e7a2ecc JH	102	ret = calloc(1, 1);
4050c0df JH	103	if (!ret)
	104	die("Out of memory, calloc failed");
	105	return ret;
	106	}
	107
1c15afb9 JH	108	static inline ssize_t xread(int fd, void *buf, size_t len)
	109	{
	110	ssize_t nr;
	111	while (1) {
	112	nr = read(fd, buf, len);
	113	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	114	continue;
	115	return nr;
	116	}
	117	}
	118
	119	static inline ssize_t xwrite(int fd, const void *buf, size_t len)
	120	{
	121	ssize_t nr;
	122	while (1) {
	123	nr = write(fd, buf, len);
	124	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	125	continue;
	126	return nr;
	127	}
	128	}
	129
4050c0df JH	130	/* Sane ctype - no locale, and works with signed chars */
	131	#undef isspace
	132	#undef isdigit
	133	#undef isalpha
	134	#undef isalnum
	135	#undef tolower
	136	#undef toupper
	137	extern unsigned char sane_ctype[256];
	138	#define GIT_SPACE 0x01
	139	#define GIT_DIGIT 0x02
	140	#define GIT_ALPHA 0x04
	141	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	142	#define isspace(x) sane_istest(x,GIT_SPACE)
	143	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	144	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	145	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
	146	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	147	#define toupper(x) sane_case((unsigned char)(x), 0)
	148
	149	static inline int sane_case(int x, int high)
	150	{
	151	if (sane_istest(x, GIT_ALPHA))
	152	x = (x & ~0x20) \| high;
	153	return x;
	154	}
	155
252fef71 MA	156	#ifndef MAXPATHLEN
	157	#define MAXPATHLEN 256
	158	#endif
4050c0df	159	#endif