new venti library.

1 files changed, 78 insertions, 0 deletions

diff --git a/src/libventi/dtype.c b/src/libventi/dtype.c
new file mode 100644
index 00000000..0151ba28
--- /dev/null
+++ b/src/libventi/dtype.c
@@ -0,0 +1,78 @@
+#include <u.h>
+#include <libc.h>
+#include <venti.h>
+
+enum {
+	OVtErrType,		/* illegal */
+
+	OVtRootType,
+	OVtDirType,
+	OVtPointerType0,
+	OVtPointerType1,
+	OVtPointerType2,
+	OVtPointerType3,
+	OVtPointerType4,
+	OVtPointerType5,
+	OVtPointerType6,
+	OVtPointerType7,		/* not used */
+	OVtPointerType8,		/* not used */
+	OVtPointerType9,		/* not used */
+	OVtDataType,
+
+	OVtMaxType
+};
+
+
+uint todisk[] = {
+	OVtDataType,
+	OVtPointerType0,
+	OVtPointerType1,
+	OVtPointerType2,
+	OVtPointerType3,
+	OVtPointerType4,
+	OVtPointerType5,
+	OVtPointerType6,
+	OVtDirType,
+	OVtPointerType0,
+	OVtPointerType1,
+	OVtPointerType2,
+	OVtPointerType3,
+	OVtPointerType4,
+	OVtPointerType5,
+	OVtPointerType6,
+	OVtRootType,
+};
+
+uint fromdisk[] = {
+	~0,
+	VtRootType,
+	VtDirType,
+	VtDirType+1,
+	VtDirType+2,
+	VtDirType+3,
+	VtDirType+4,
+	VtDirType+5,
+	VtDirType+6,
+	VtDirType+7,
+	~0,
+	~0,
+	~0,
+	VtDataType,
+};
+
+uint
+vttodisktype(uint n)
+{
+	if(n >= nelem(todisk))
+		return ~0;
+	return todisk[n];
+}
+
+uint
+vtfromdisktype(uint n)
+{
+	if(n >= nelem(fromdisk))
+		return ~0;
+	return fromdisk[n];
+}
+