105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
/*
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* Copyright (c) 2022 The GoPlus Authors (goplus.org). All rights reserved.
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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 parser
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import (
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"bytes"
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"os"
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"os/exec"
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"strings"
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"github.com/goplus/llgo/xtool/clang/ast"
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jsoniter "github.com/json-iterator/go"
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)
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type Mode uint
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// -----------------------------------------------------------------------------
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type ParseError struct {
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Err error
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Stderr []byte
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}
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func (p *ParseError) Error() string {
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if len(p.Stderr) > 0 {
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return string(p.Stderr)
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}
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return p.Err.Error()
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}
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// -----------------------------------------------------------------------------
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type Config struct {
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Json *[]byte
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Flags []string
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Stderr bool
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}
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func DumpAST(filename string, conf *Config) (result []byte, warning []byte, err error) {
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if conf == nil {
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conf = new(Config)
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}
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skiperr := strings.HasSuffix(filename, "vfprintf.c.i")
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stdout := NewPagedWriter()
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stderr := new(bytes.Buffer)
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args := []string{"-Xclang", "-ast-dump=json", "-fsyntax-only", filename}
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if len(conf.Flags) != 0 {
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args = append(conf.Flags, args...)
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}
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cmd := exec.Command("clang", args...)
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cmd.Stdin = os.Stdin
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cmd.Stdout = stdout
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if conf.Stderr && !skiperr {
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cmd.Stderr = os.Stderr
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} else {
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cmd.Stderr = stderr
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}
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err = cmd.Run()
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errmsg := stderr.Bytes()
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if err != nil && !skiperr {
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return nil, nil, &ParseError{Err: err, Stderr: errmsg}
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}
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return stdout.Bytes(), errmsg, nil
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}
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// -----------------------------------------------------------------------------
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var json = jsoniter.ConfigCompatibleWithStandardLibrary
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func ParseFileEx(filename string, mode Mode, conf *Config) (file *ast.Node, warning []byte, err error) {
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out, warning, err := DumpAST(filename, conf)
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if err != nil {
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return
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}
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if conf != nil && conf.Json != nil {
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*conf.Json = out
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}
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file = new(ast.Node)
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err = json.Unmarshal(out, file)
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if err != nil {
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err = &ParseError{Err: err}
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}
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return
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}
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func ParseFile(filename string, mode Mode) (file *ast.Node, warning []byte, err error) {
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return ParseFileEx(filename, mode, nil)
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}
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// -----------------------------------------------------------------------------
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