mirror of
https://github.com/git/git.git
synced 2024-06-11 05:46:15 +02:00
8f1d2e6f49
ISO C99 (and GCC 3.x or later) lets you write a flexible array
at the end of a structure, like this:
struct frotz {
int xyzzy;
char nitfol[]; /* more */
};
GCC 2.95 and 2.96 let you to do this with "char nitfol[0]";
unfortunately this is not allowed by ISO C90.
This declares such construct like this:
struct frotz {
int xyzzy;
char nitfol[FLEX_ARRAY]; /* more */
};
and git-compat-util.h defines FLEX_ARRAY to 0 for gcc 2.95 and
empty for others.
If you are using a C90 C compiler, you should be able
to override this with CFLAGS=-DFLEX_ARRAY=1 from the
command line of "make".
Signed-off-by: Junio C Hamano <junkio@cox.net>
153 lines
3.2 KiB
C
153 lines
3.2 KiB
C
#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_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
|