a572a10ef7
This adds a code generator, implemented in Go. This PR also prepares `Options.h` (the ground truth) by simplifying its syntax just a bit. The ground truth file must have very simple C++ syntax, which is described in the README: https://github.com/google/filament/blob/pr/codegen2/tools/codegen-options/README.md This process revealed a small bug: `Filter.MEDIAN` was bound to the incorrect value in Java. The generated code is not yet used, stay tuned.
104 lines
2.7 KiB
Go
104 lines
2.7 KiB
Go
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package main
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import (
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"fmt"
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"log"
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"os"
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"path/filepath"
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"text/template"
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)
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func EmitSerializer(definitions []Scope, outputFolder string) {
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// The following template extensions make it possible to generate valid C++ code with
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// fewer if-then-else blocks in the template file.
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customExtensions := template.FuncMap{
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"trailingcomma": func(index, length int) string {
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if index == length-1 {
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return ""
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}
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return ","
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},
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"elseif": func(index int) string {
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if index == 0 {
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return "if"
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}
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return "else if"
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},
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"braceif": func(index int) string {
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if index == 0 {
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return "if"
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}
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return "} else if"
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},
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"cast": func(ctype string) string {
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switch ctype {
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case "bool":
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return "to_string"
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case "uint8_t":
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return "int"
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}
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return ""
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},
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}
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codegen := template.New("Settings").Funcs(customExtensions)
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codegen = template.Must(codegen.ParseFiles("serializer.template"))
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{
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path := filepath.Join(outputFolder, "Settings_generated.cpp")
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file, err := os.Create(path)
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if err != nil {
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log.Fatal(err)
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}
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defer file.Close()
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defer fmt.Println("Generated " + path)
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codegen.ExecuteTemplate(file, "CppHeader", nil)
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for _, definition := range definitions {
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switch definition.(type) {
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case *StructDefinition:
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codegen.ExecuteTemplate(file, "CppStructReader", definition)
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codegen.ExecuteTemplate(file, "CppStructWriter", definition)
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case *EnumDefinition:
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codegen.ExecuteTemplate(file, "CppEnumReader", definition)
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codegen.ExecuteTemplate(file, "CppEnumWriter", definition)
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}
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}
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codegen.ExecuteTemplate(file, "CppFooter", nil)
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}
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{
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path := filepath.Join(outputFolder, "Settings_generated.h")
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file, err := os.Create(path)
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if err != nil {
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log.Fatal(err)
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}
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defer file.Close()
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defer fmt.Println("Generated " + path)
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codegen.ExecuteTemplate(file, "HppHeader", nil)
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for _, definition := range definitions {
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switch definition.(type) {
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case *StructDefinition:
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codegen.ExecuteTemplate(file, "HppStruct", definition)
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case *EnumDefinition:
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codegen.ExecuteTemplate(file, "HppEnum", definition)
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}
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}
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codegen.ExecuteTemplate(file, "HppFooter", nil)
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}
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}
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