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// Copyright 2015 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 cc

import (
	"fmt"
	"regexp"
	"strings"

	"android/soong/android"
)

// Efficiently converts a list of include directories to a single string
// of cflags with -I prepended to each directory.
func includeDirsToFlags(dirs android.Paths) string {
	return android.JoinWithPrefix(dirs.Strings(), "-I")
}

func includeFilesToFlags(files android.Paths) string {
	return android.JoinWithPrefix(files.Strings(), "-include ")
}

func ldDirsToFlags(dirs []string) string {
	return android.JoinWithPrefix(dirs, "-L")
}

func libNamesToFlags(names []string) string {
	return android.JoinWithPrefix(names, "-l")
}

var indexList = android.IndexList
var inList = android.InList
var filterList = android.FilterList
var removeListFromList = android.RemoveListFromList
var removeFromList = android.RemoveFromList

var libNameRegexp = regexp.MustCompile(`^lib(.*)$`)

func moduleToLibName(module string) (string, error) {
	matches := libNameRegexp.FindStringSubmatch(module)
	if matches == nil {
		return "", fmt.Errorf("Library module name %s does not start with lib", module)
	}
	return matches[1], nil
}

func flagsToBuilderFlags(in Flags) builderFlags {
	return builderFlags{
		globalFlags:    strings.Join(in.GlobalFlags, " "),
		arFlags:        strings.Join(in.ArFlags, " "),
		asFlags:        strings.Join(in.AsFlags, " "),
		cFlags:         strings.Join(in.CFlags, " "),
		toolingCFlags:  strings.Join(in.ToolingCFlags, " "),
		conlyFlags:     strings.Join(in.ConlyFlags, " "),
		cppFlags:       strings.Join(in.CppFlags, " "),
		yaccFlags:      strings.Join(in.YaccFlags, " "),
		protoFlags:     strings.Join(in.protoFlags, " "),
		protoOutParams: strings.Join(in.protoOutParams, ":"),
		aidlFlags:      strings.Join(in.aidlFlags, " "),
		rsFlags:        strings.Join(in.rsFlags, " "),
		ldFlags:        strings.Join(in.LdFlags, " "),
		libFlags:       strings.Join(in.libFlags, " "),
		tidyFlags:      strings.Join(in.TidyFlags, " "),
		sAbiFlags:      strings.Join(in.SAbiFlags, " "),
		yasmFlags:      strings.Join(in.YasmFlags, " "),
		toolchain:      in.Toolchain,
		clang:          in.Clang,
		coverage:       in.Coverage,
		tidy:           in.Tidy,
		sAbiDump:       in.SAbiDump,

		systemIncludeFlags: strings.Join(in.SystemIncludeFlags, " "),

		groupStaticLibs: in.GroupStaticLibs,
		arGoldPlugin:    in.ArGoldPlugin,
	}
}

func addPrefix(list []string, prefix string) []string {
	for i := range list {
		list[i] = prefix + list[i]
	}
	return list
}

func addSuffix(list []string, suffix string) []string {
	for i := range list {
		list[i] = list[i] + suffix
	}
	return list
}