[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)));

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));

#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

#ifdef NO_STRLCPY
#define strlcpy gitstrlcpy
extern size_t gitstrlcpy(char *, const char *, size_t);
#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");
#ifdef XMALLOC_POISON
	memset(ret, 0xA5, size);
#endif
	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;
	}
}

static inline int has_extension(const char *filename, int len, const char *ext)
{
	int 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;
}

#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
39a3f5ea PB	43	extern void set_usage_routine(void (routine)(const char err) NORETURN);
	44	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
	45	extern void set_error_routine(void (routine)(const char err, va_list params));
	46
4050c0df JH	47	#ifdef NO_MMAP
	48
	49	#ifndef PROT_READ
	50	#define PROT_READ 1
	51	#define PROT_WRITE 2
	52	#define MAP_PRIVATE 1
	53	#define MAP_FAILED ((void*)-1)
	54	#endif
	55
	56	#define mmap gitfakemmap
	57	#define munmap gitfakemunmap
	58	extern void gitfakemmap(void start, size_t length, int prot , int flags, int fd, off_t offset);
	59	extern int gitfakemunmap(void *start, size_t length);
	60
	61	#else /* NO_MMAP */
	62
	63	#include <sys/mman.h>
	64
	65	#endif /* NO_MMAP */
	66
	67	#ifdef NO_SETENV
	68	#define setenv gitsetenv
	69	extern int gitsetenv(const char , const char , int);
	70	#endif
	71
731043fd JR	72	#ifdef NO_UNSETENV
	73	#define unsetenv gitunsetenv
	74	extern void gitunsetenv(const char *);
	75	#endif
	76
4050c0df JH	77	#ifdef NO_STRCASESTR
	78	#define strcasestr gitstrcasestr
	79	extern char gitstrcasestr(const char haystack, const char *needle);
	80	#endif
	81
817151e6 PE	82	#ifdef NO_STRLCPY
	83	#define strlcpy gitstrlcpy
	84	extern size_t gitstrlcpy(char , const char , size_t);
	85	#endif
	86
4050c0df JH	87	static inline void *xmalloc(size_t size)
	88	{
	89	void *ret = malloc(size);
4e7a2ecc JH	90	if (!ret && !size)
4e7a2ecc JH	91	ret = malloc(1);
4050c0df JH	92	if (!ret)
4050c0df JH	93	die("Out of memory, malloc failed");
aa5481c1 JH	94	#ifdef XMALLOC_POISON
	95	memset(ret, 0xA5, size);
	96	#endif
4050c0df JH	97	return ret;
	98	}
	99
	100	static inline void xrealloc(void ptr, size_t size)
	101	{
	102	void *ret = realloc(ptr, size);
4e7a2ecc JH	103	if (!ret && !size)
4e7a2ecc JH	104	ret = realloc(ptr, 1);
4050c0df JH	105	if (!ret)
	106	die("Out of memory, realloc failed");
	107	return ret;
	108	}
	109
	110	static inline void *xcalloc(size_t nmemb, size_t size)
	111	{
	112	void *ret = calloc(nmemb, size);
4e7a2ecc JH	113	if (!ret && (!nmemb \|\| !size))
4e7a2ecc JH	114	ret = calloc(1, 1);
4050c0df JH	115	if (!ret)
	116	die("Out of memory, calloc failed");
	117	return ret;
	118	}
	119
1c15afb9 JH	120	static inline ssize_t xread(int fd, void *buf, size_t len)
	121	{
	122	ssize_t nr;
	123	while (1) {
	124	nr = read(fd, buf, len);
	125	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	126	continue;
	127	return nr;
	128	}
	129	}
	130
	131	static inline ssize_t xwrite(int fd, const void *buf, size_t len)
	132	{
	133	ssize_t nr;
	134	while (1) {
	135	nr = write(fd, buf, len);
	136	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	137	continue;
	138	return nr;
	139	}
	140	}
	141
83a2b841 RS	142	static inline int has_extension(const char filename, int len, const char ext)
	143	{
	144	int extlen = strlen(ext);
	145	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	146	}
	147
4050c0df JH	148	/* Sane ctype - no locale, and works with signed chars */
	149	#undef isspace
	150	#undef isdigit
	151	#undef isalpha
	152	#undef isalnum
	153	#undef tolower
	154	#undef toupper
	155	extern unsigned char sane_ctype[256];
	156	#define GIT_SPACE 0x01
	157	#define GIT_DIGIT 0x02
	158	#define GIT_ALPHA 0x04
	159	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	160	#define isspace(x) sane_istest(x,GIT_SPACE)
	161	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	162	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	163	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
	164	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	165	#define toupper(x) sane_case((unsigned char)(x), 0)
	166
	167	static inline int sane_case(int x, int high)
	168	{
	169	if (sane_istest(x, GIT_ALPHA))
	170	x = (x & ~0x20) \| high;
	171	return x;
	172	}
	173
252fef71 MA	174	#ifndef MAXPATHLEN
	175	#define MAXPATHLEN 256
	176	#endif
4050c0df	177	#endif