gnuboy-for-dfi/sys/dos/dos.c

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/*
* dos.c
*
* System interface for DOS.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char *strdup();
#include <stdarg.h>
#include <sys/time.h>
#include <unistd.h>
#include <signal.h>
#include <time.h>
#define US(n) ( ((long long)(n)) * 1000000 / UCLOCKS_PER_SEC )
void *sys_timer()
{
uclock_t *cl;
cl = malloc(sizeof *cl);
*cl = uclock();
return cl;
}
int sys_elapsed(uclock_t *cl)
{
uclock_t now;
int usecs;
now = uclock();
usecs = US(now - *cl);
*cl = now;
return usecs;
}
void sys_sleep(int us)
{
uclock_t start;
if (us <= 0) return;
start = uclock();
while(US(uclock()-start) < us);
}
void sys_checkdir(char *path, int wr)
{
}
void sys_initpath(char *exe)
{
char *buf, *home, *p;
home = strdup(exe);
p = strrchr(home, '/');
if (p) *p = 0;
else
{
buf = ".";
rc_setvar("rcpath", 1, &buf);
rc_setvar("savedir", 1, &buf);
return;
}
buf = malloc(strlen(home) + 8);
sprintf(buf, ".;%s/", home);
rc_setvar("rcpath", 1, &buf);
sprintf(buf, ".");
rc_setvar("savedir", 1, &buf);
free(buf);
}
void sys_sanitize(char *s)
{
int i;
for (i = 0; s[i]; i++)
if (s[i] == '\\') s[i] = '/';
}