Support White_Space property (Meet RL1.2 of UTS #18 partially)

1 files changed, 34 insertions, 0 deletions

diff --git a/ucd/prop_list.go b/ucd/prop_list.go
new file mode 100644
index 0000000..cd4a7fe
--- /dev/null
+++ b/ucd/prop_list.go
@@ -0,0 +1,34 @@
+package ucd
+
+import "io"
+
+type PropList struct {
+	WhiteSpace []*CodePointRange
+}
+
+// ParsePropList parses the PropList.txt.
+func ParsePropList(r io.Reader) (*PropList, error) {
+	var ws []*CodePointRange
+	p := newParser(r)
+	for p.parse() {
+		if len(p.fields) == 0 {
+			continue
+		}
+		if p.fields[1].symbol() != "White_Space" {
+			continue
+		}
+		
+		cp, err := p.fields[0].codePointRange()
+		if err != nil {
+			return nil, err
+		}
+		ws = append(ws, cp)
+	}
+	if p.err != nil {
+		return nil, p.err
+	}
+
+	return &PropList{
+		WhiteSpace: ws,
+	}, nil
+}