1 files changed, 109 insertions, 0 deletions
diff --git a/cc/gen.go b/cc/gen.go
new file mode 100644
index 00000000..bd91d647
--- /dev/null
+++ b/cc/gen.go
@@ -0,0 +1,109 @@
+// 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
+
+// This file generates the final rules for compiling all C/C++.  All properties related to
+// compiling should have been translated into builderFlags or another argument to the Transform*
+// functions.
+
+import (
+	"path/filepath"
+	"strings"
+
+	"github.com/google/blueprint"
+	"github.com/google/blueprint/pathtools"
+
+	"android/soong/common"
+)
+
+func init() {
+	pctx.StaticVariable("lexCmd", "${SrcDir}/prebuilts/misc/${HostPrebuiltTag}/flex/flex-2.5.39")
+	pctx.StaticVariable("yaccCmd", "${SrcDir}/prebuilts/misc/${HostPrebuiltTag}/bison/bison")
+	pctx.StaticVariable("yaccDataDir", "${SrcDir}/external/bison/data")
+}
+
+var (
+	yacc = pctx.StaticRule("yacc",
+		blueprint.RuleParams{
+			Command: "BISON_PKGDATADIR=$yaccDataDir $yaccCmd -d $yaccFlags -o $cppFile $in && " +
+				"cp -f $hppFile $hFile",
+			Description: "yacc $out",
+		},
+		"yaccFlags", "cppFile", "hppFile", "hFile")
+
+	lex = pctx.StaticRule("lex",
+		blueprint.RuleParams{
+			Command:     "$lexCmd -o$out $in",
+			Description: "lex $out",
+		})
+)
+
+func genYacc(ctx common.AndroidModuleContext, yaccFile, yaccFlags string) (cppFile, headerFile string) {
+	cppFile = strings.TrimPrefix(yaccFile, common.ModuleSrcDir(ctx))
+	cppFile = filepath.Join(common.ModuleGenDir(ctx), cppFile)
+	cppFile = pathtools.ReplaceExtension(cppFile, "cpp")
+	hppFile := pathtools.ReplaceExtension(cppFile, "hpp")
+	headerFile = pathtools.ReplaceExtension(cppFile, "h")
+
+	ctx.Build(pctx, blueprint.BuildParams{
+		Rule:      yacc,
+		Outputs:   []string{cppFile, headerFile},
+		Inputs:    []string{yaccFile},
+		Implicits: []string{"$yaccCmd"},
+		Args: map[string]string{
+			"yaccFlags": yaccFlags,
+			"cppFile":   cppFile,
+			"hppFile":   hppFile,
+			"hFile":     headerFile,
+		},
+	})
+
+	return cppFile, headerFile
+}
+
+func genLex(ctx common.AndroidModuleContext, lexFile string) (cppFile string) {
+	cppFile = strings.TrimPrefix(lexFile, common.ModuleSrcDir(ctx))
+	cppFile = filepath.Join(common.ModuleGenDir(ctx), cppFile)
+	cppFile = pathtools.ReplaceExtension(cppFile, "cpp")
+
+	ctx.Build(pctx, blueprint.BuildParams{
+		Rule:      lex,
+		Outputs:   []string{cppFile},
+		Inputs:    []string{lexFile},
+		Implicits: []string{"$lexCmd"},
+	})
+
+	return cppFile
+}
+
+func genSources(ctx common.AndroidModuleContext, srcFiles []string,
+	buildFlags builderFlags) ([]string, []string) {
+
+	var deps []string
+
+	for i, srcFile := range srcFiles {
+		switch filepath.Ext(srcFile) {
+		case ".y", ".yy":
+			cppFile, headerFile := genYacc(ctx, srcFile, buildFlags.yaccFlags)
+			srcFiles[i] = cppFile
+			deps = append(deps, headerFile)
+		case ".l", ".ll":
+			cppFile := genLex(ctx, srcFile)
+			srcFiles[i] = cppFile
+		}
+	}
+
+	return srcFiles, deps
+}