20060303a

1 files changed, 28 insertions, 0 deletions

diff --git a/libnandfs/findfreeblock.c b/libnandfs/findfreeblock.c
new file mode 100644
index 00000000..e17f729a
--- /dev/null
+++ b/libnandfs/findfreeblock.c
@@ -0,0 +1,28 @@
+#include "lib9.h"
+#include "logfs.h"
+#include "nandfs.h"
+#include "local.h"
+
+long
+nandfsfindfreeblock(Nandfs *nandfs, long *freeblocksp)
+{
+	long bestnewblock;
+	long bestnerase;
+	long i;
+
+	if (freeblocksp)
+		*freeblocksp = 0;
+	for (i = 0, bestnewblock = -1, bestnerase = 0x7fffffff; i < nandfs->ll.blocks; i++) {
+		long nerase;
+		if (nandfsgettag(nandfs, i) == LogfsTnone) {
+			if (freeblocksp) {
+				(*freeblocksp)++;
+			}
+			if ((nerase = nandfsgetnerase(nandfs, i)) < bestnerase) {
+				bestnewblock = i;
+				bestnerase = nerase;
+			}
+		}
+	}
+	return bestnewblock;
+}