Basic types.

1 files changed, 44 insertions, 0 deletions

diff --git a/page.go b/page.go
new file mode 100644
index 0000000..3f1e6b3
--- /dev/null
+++ b/page.go
@@ -0,0 +1,44 @@
+package bolt
+
+import (
+	"unsafe"
+)
+
+const MinPageKeys = 2
+const FillThreshold = 250 // 25%
+
+const (
+	BranchPage   = 0x01
+	LeafPage     = 0x02
+	OverflowPage = 0x04
+	MetaPage     = 0x08
+	DirtyPage    = 0x10 /**< dirty page, also set for #P_SUBP pages */
+	SubPage      = 0x40
+	KeepPage     = 0x8000 /**< leave this page alone during spill */
+)
+
+type page struct {
+	header struct {
+		id                int
+		next              *page // (?)
+		lower             int
+		upper             int
+		overflowPageCount int
+	}
+	metadata []byte
+}
+
+// nodeCount returns the number of nodes on the page.
+func (p *page) nodeCount() int {
+	return 0 // (p.header.lower - unsafe.Sizeof(p.header) >> 1
+}
+
+// remainingSize returns the number of bytes left in the page.
+func (p *page) remainingSize() int {
+	return p.header.upper - p.header.lower
+}
+
+// remainingSize returns the number of bytes left in the page.
+func (p *page) remainingSize() int {
+	return p.header.upper - p.header.lower
+}