Initial commit. Beginnings of an ndb parsing library. Lexer/parser functional.

What's left is mapping the input to Go values.

parse_test.go

@@ -0,0 +1,69 @@
+package ndb
+
+import (
+	"testing"
+	"bytes"
+)
+
+var parseTests = []struct {
+	in []byte
+	out []pair
+}{
+	{
+		in: []byte("key1=val1 key2=val2 key3=val3"),
+		out: []pair {
+			{[]byte("key1"),[]byte("val1")},
+			{[]byte("key2"),[]byte("val2")},
+			{[]byte("key3"),[]byte("val3")}},
+	},
+	{
+		in: []byte("title='Some value with spaces' width=340 height=200"),
+		out: []pair {
+			{[]byte("title"),[]byte("Some value with spaces")},
+			{[]byte("width"),[]byte("340")},
+			{[]byte("height"),[]byte("200")}},
+	},
+	{
+		in: []byte("title='Dave''s pasta' sq=Davis cost=$$"),
+		out: []pair {
+			{[]byte("title"),[]byte("Dave's pasta")},
+			{[]byte("sq"),[]byte("Davis")},
+			{[]byte("cost"),[]byte("$$")}},
+	},
+	{
+		in: []byte("action=''bradley key=jay mod=ctrl+alt+shift"),
+		out: []pair {
+			{[]byte("action"),[]byte("'bradley")},
+			{[]byte("key"),[]byte("jay")},
+			{[]byte("mod"),[]byte("ctrl+alt+shift")}},
+	},
+	{
+		in: []byte("action=reload key='' mod=ctrl+alt+shift"),
+		out: []pair {
+			{[]byte("action"),[]byte("reload")},
+			{[]byte("key"),[]byte("'")},
+			{[]byte("mod"),[]byte("ctrl+alt+shift")}},
+	},
+}
+
+func Test_parsing(t *testing.T) {
+	for i,tt := range parseTests {
+		d := NewDecoder(bytes.NewReader(tt.in))
+		p,err := d.getPairs()
+		if err != nil {
+			t.Error(err)
+			t.FailNow()
+		} else {
+			for j := range tt.out {
+				if j > len(p) || !match(p[j],tt.out[j]) {
+					t.Errorf("%d: getPairs %s => %v, want %v",i, tt.in, p, tt.out)
+					t.FailNow()
+				}
+			}
+		}
+	}
+}
+
+func match(p1, p2 pair) bool {
+	return (bytes.Compare(p1.attr, p2.attr) == 0) && (bytes.Compare(p1.val, p2.val) == 0)
+}