22bad1701f
G2 code generation used after benchmarking. style benchmark old ns/op new ns/op delta T0 BenchmarkParser 672 5631 +737.95% T1 BenchmarkParser 672 5579 +730.21% G0 BenchmarkParser 672 4049 +502.53% G1 BenchmarkParser 672 3868 +475.60% G2 BenchmarkParser 672 3543 +427.23% F0 and F1 create massive Go source (6.0M) and so were not tested. Invalid tests removed, additional tests for invalid input to be added later.
70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
// Copyright 2014 The Cayley Authors. 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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package nquads
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import (
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"bufio"
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"errors"
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"fmt"
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"io"
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"github.com/google/cayley/graph"
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)
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var (
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ErrAbsentSubject = errors.New("nqauds: absent subject")
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ErrAbsentPredicate = errors.New("nqauds: absent predicate")
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ErrAbsentObject = errors.New("nqauds: absent object")
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ErrUnterminated = errors.New("nqauds: unterminated quad")
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)
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func Parse(str string) (*graph.Triple, error) {
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t, err := parse([]rune(str))
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if err != nil {
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return nil, err
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}
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return &t, nil
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}
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type Decoder struct {
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r *bufio.Reader
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line []byte
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}
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func NewDecoder(r io.Reader) *Decoder {
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return &Decoder{r: bufio.NewReader(r)}
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}
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func (dec *Decoder) Unmarshal() (*graph.Triple, error) {
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dec.line = dec.line[:0]
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for {
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l, pre, err := dec.r.ReadLine()
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if err != nil {
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return nil, err
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}
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dec.line = append(dec.line, l...)
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if !pre {
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break
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}
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}
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triple, err := Parse(string(dec.line))
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if err != nil {
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return nil, fmt.Errorf("failed to parse %q: %v", dec.line, err)
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}
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if triple == nil {
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return dec.Unmarshal()
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}
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return triple, nil
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}
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