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/* ISC license. */
#include <errno.h>
#include <skalibs/buffer.h>
#include <skalibs/djbunix.h>
#include <skalibs/unirandom.h>
#include <skalibs/unirandomdev.h>
int unirandomdev_sinit (union unirandominfo *u, char const *file)
{
register int fd = open_read(file) ;
if (fd < 0) return 0 ;
if (coe(fd) < 0)
{
register int e = errno ;
fd_close(fd) ;
errno = e ;
return 0 ;
}
buffer_init(&u->device.b, &buffer_read, fd, u->device.buf, RANDOMBUF_BUFSIZE) ;
u->device.nb = 1 ;
return 1 ;
}
int unirandomdev_finish (union unirandominfo *u)
{
return fd_close(buffer_fd(&u->device.b)) < 0 ;
}
static unsigned int unirandomdev_read (union unirandominfo *u, char *s, unsigned int n, unsigned int h)
{
unsigned int w = 0 ;
if (u->device.nb != h)
{
if ((h ? ndelay_on(buffer_fd(&u->device.b)) : ndelay_off(buffer_fd(&u->device.b))) < 0) return 0 ;
u->device.nb = h ;
}
buffer_getall(&u->device.b, s, n, &w) ;
return w ;
}
unsigned int unirandomdev_readb (union unirandominfo *u, char *s, unsigned int n)
{
return unirandomdev_read(u, s, n, 0) ;
}
unsigned int unirandomdev_readnb (union unirandominfo *u, char *s, unsigned int n)
{
return unirandomdev_read(u, s, n, 1) ;
}
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