Move the functions for encoding decoding struct dos_partition into

a separate .c file so they can be used from userland as well.

1 files changed, 72 insertions, 0 deletions

diff --git a/sys/geom/geom_mbr_enc.c b/sys/geom/geom_mbr_enc.c
new file mode 100644
index 0000000..b5d560a
--- /dev/null
+++ b/sys/geom/geom_mbr_enc.c
@@ -0,0 +1,72 @@
+/*-
+ * Copyright (c) 2003 Poul-Henning Kamp
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ * Functions to encode or decode struct dos_partition into a bytestream
+ * of correct endianess and packing.  These functions do no validation
+ * or sanity checking, they only pack/unpack the fields correctly.
+ *
+ * NB!  This file must be usable both in kernel and userland.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/diskmbr.h>
+#include <sys/endian.h>
+
+void
+dos_partition_dec(void const *pp, struct dos_partition *d)
+{
+	unsigned char const *p = pp;
+
+	d->dp_flag = p[0];
+	d->dp_shd = p[1];
+	d->dp_ssect = p[2];
+	d->dp_scyl = p[3];
+	d->dp_typ = p[4];
+	d->dp_ehd = p[5];
+	d->dp_esect = p[6];
+	d->dp_ecyl = p[7];
+	d->dp_start = le32dec(p + 8);
+	d->dp_size = le32dec(p + 12);
+}
+
+void
+dos_partition_enc(void *pp, struct dos_partition *d)
+{
+	unsigned char *p = pp;
+
+	p[0] = d->dp_flag;
+	p[1] = d->dp_shd;
+	p[2] = d->dp_ssect;
+	p[3] = d->dp_scyl;
+	p[4] = d->dp_typ;
+	p[5] = d->dp_ehd;
+	p[6] = d->dp_esect;
+	p[7] = d->dp_ecyl;
+	le32enc(p + 8, d->dp_start);
+	le32enc(p + 12, d->dp_size);
+}