int truncate(int fd)
{ IREGS r;
r.r_ax = 0x4000; /* Write to file descriptor */
r.r_bx = fd;
r.r_cx = 0; /* Indicates "truncate" */
return invokeDOS(&r);
}
int findnext(struct ffblk *ff)
{ void far *dta;
IREGS r;
int rv;
dta = getdta();
setdta((void far*)ff);
r.r_ax = 0x4f00;
rv = invokeDOS(&r);
setdta(dta);
return rv;
}
int findfirst(const char * const pattern, struct ffblk *ff, int attrib)
{ void far *dta;
IREGS r;
int rv;
/* DOS uses the DTA to store the internal search data to.
The usual implementation of find*() keeps the first
21 bytes of the DTA or simply hope that no DOS will use
more than 21 byte and point the DTA directly on the
search data buffer. */
dta = getdta();
setdta((void far*)ff);
r.r_dx = FP_OFF(pattern);
r.r_ds = FP_SEG(pattern);
r.r_cx = attrib;
r.r_ax = 0x4e00;
rv = invokeDOS(&r);
setdta(dta);
return rv;
}
