20060303a

1 files changed, 24 insertions, 0 deletions

diff --git a/libnandfs/calcformat.c b/libnandfs/calcformat.c
new file mode 100644
index 00000000..498427f5
--- /dev/null
+++ b/libnandfs/calcformat.c
@@ -0,0 +1,24 @@
+#include "lib9.h"
+#include "logfs.h"
+#include "nandfs.h"
+#include "local.h"
+
+int
+nandfscalcformat(Nandfs *nandfs, long base, long limit, long bootsize, long *baseblock, long *limitblock, long *bootblocks)
+{
+	*baseblock = (base + nandfs->rawblocksize - 1) / nandfs->rawblocksize;
+	if (limit == 0)
+		*limitblock = nandfs->limitblock;	
+	else
+		*limitblock = limit / nandfs->rawblocksize;
+	*bootblocks = (bootsize + nandfs->rawblocksize - 1) / nandfs->rawblocksize;
+	if (*bootblocks < 3)
+		*bootblocks = 3;
+	/* sanity checks */	
+	if (*limitblock > nandfs->limitblock
+		|| *baseblock < nandfs->baseblock
+		|| *bootblocks > nandfs->limitblock - nandfs->baseblock)
+		return 0;
+	return 1;
+}
+