upload android base code part3

android/build/blueprint/proptools/proptools.go

@@ -0,0 +1,79 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package proptools
+
+import (
+	"reflect"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+func PropertyNameForField(fieldName string) string {
+	r, size := utf8.DecodeRuneInString(fieldName)
+	propertyName := string(unicode.ToLower(r))
+	if len(fieldName) > size {
+		propertyName += fieldName[size:]
+	}
+	return propertyName
+}
+
+func FieldNameForProperty(propertyName string) string {
+	r, size := utf8.DecodeRuneInString(propertyName)
+	fieldName := string(unicode.ToUpper(r))
+	if len(propertyName) > size {
+		fieldName += propertyName[size:]
+	}
+	return fieldName
+}
+
+func HasTag(field reflect.StructField, name, value string) bool {
+	tag := field.Tag.Get(name)
+	for _, entry := range strings.Split(tag, ",") {
+		if entry == value {
+			return true
+		}
+	}
+
+	return false
+}
+
+// BoolPtr returns a pointer to a new bool containing the given value.
+func BoolPtr(b bool) *bool {
+	return &b
+}
+
+// StringPtr returns a pointer to a new string containing the given value.
+func StringPtr(s string) *string {
+	return &s
+}
+
+// Bool takes a pointer to a bool and returns true iff the pointer is non-nil and points to a true
+// value.
+func Bool(b *bool) bool {
+	if b != nil {
+		return *b
+	}
+	return false
+}
+
+// String takes a pointer to a string and returns the value of the string if the pointer is non-nil,
+// or an empty string.
+func String(s *string) string {
+	if s != nil {
+		return *s
+	}
+	return ""
+}