initial commit with rc for skalibs-2.0.0.0

1 files changed, 50 insertions, 0 deletions

diff --git a/src/librandom/unirandomdev.c b/src/librandom/unirandomdev.c
new file mode 100644
index 0000000..4a22514
--- /dev/null
+++ b/src/librandom/unirandomdev.c
@@ -0,0 +1,50 @@
+/* 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) ;
+}