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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package syntax
import (
"fmt"
"io"
"os"
)
type Mode uint
// TODO(gri) These need a lot more work.
func ReadFile(filename string, mode Mode) (*File, error) {
src, err := os.Open(filename)
if err != nil {
return nil, err
}
defer src.Close()
return Read(src, mode)
}
type bytesReader struct {
data []byte
}
func (r *bytesReader) Read(p []byte) (int, error) {
if len(r.data) > 0 {
n := copy(p, r.data)
r.data = r.data[n:]
return n, nil
}
return 0, io.EOF
}
func ReadBytes(src []byte, mode Mode) (*File, error) {
return Read(&bytesReader{src}, mode)
}
func Read(src io.Reader, mode Mode) (*File, error) {
var p parser
p.init(src)
// skip initial BOM if present
if p.getr() != '\ufeff' {
p.ungetr()
}
p.next()
ast := p.file()
if nerrors > 0 {
return nil, fmt.Errorf("%d syntax errors", nerrors)
}
return ast, nil
}
func Write(w io.Writer, n *File) error {
panic("unimplemented")
}
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