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leapsecs_read.c
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leapsecs_read.c
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#ifdef WIN32
#include <io.h>
#include <fcntl.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#else
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
extern int errno;
#endif
#include "tai.h"
#include "leapsecs.h"
struct tai *leapsecs = 0;
int leapsecs_num = 0;
int leapsecs_read()
{
#ifdef WIN32
int fd;
struct tai *t;
struct _stat st;
int n;
int i;
struct tai u;
fd = _open("leapsecs.dat", _O_RDONLY);
if (fd == -1) {
if (leapsecs) free(leapsecs);
leapsecs = 0;
leapsecs_num = 0;
return 0;
}
if (_fstat(fd,&st) == -1) { close(fd); return -1; }
t = (struct tai *) malloc(st.st_size);
if (!t) { close(fd); return -1; }
n = read(fd,(char *) t,st.st_size);
close(fd);
if (n != st.st_size) { free(t); return -1; }
n /= sizeof(struct tai);
for (i = 0;i < n;++i) {
tai_unpack((char *) &t[i],&u);
t[i] = u;
}
if (leapsecs) free(leapsecs);
leapsecs = t;
leapsecs_num = n;
#else
int fd;
struct stat st;
struct tai *t;
int n;
int i;
struct tai u;
fd = open("leapsecs.dat",O_RDONLY | O_NDELAY);
if (fd == -1) {
if (errno != ENOENT) return -1;
if (leapsecs) free(leapsecs);
leapsecs = 0;
leapsecs_num = 0;
return 0;
}
if (fstat(fd,&st) == -1) { close(fd); return -1; }
t = (struct tai *) malloc(st.st_size);
if (!t) { close(fd); return -1; }
n = read(fd,(char *) t,st.st_size);
close(fd);
if (n != st.st_size) { free(t); return -1; }
n /= sizeof(struct tai);
for (i = 0;i < n;++i) {
tai_unpack((char *) &t[i],&u);
t[i] = u;
}
if (leapsecs) free(leapsecs);
leapsecs = t;
leapsecs_num = n;
#endif
return(0);
}