120 lines
2.2 KiB
Ragel
120 lines
2.2 KiB
Ragel
// GO SOURCE FILE MACHINE GENERATED BY RAGEL; DO NOT EDIT
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// 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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"bytes"
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"errors"
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"fmt"
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"strconv"
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"github.com/google/cayley/graph"
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)
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var (
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ErrInvalid = errors.New("invalid N-Quad")
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ErrIncomplete = errors.New("incomplete N-Quad")
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)
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%%{
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machine quads;
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include "actions.rl";
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include "nquads.rl";
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write data;
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}%%
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func parse(data []rune) (graph.Triple, error) {
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var (
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cs, p int
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pe = len(data)
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eof = pe
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subject = -1
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predicate = -1
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object = -1
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label = -1
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isEscaped bool
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triple graph.Triple
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)
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%%write init;
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%%write exec;
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return graph.Triple{}, ErrInvalid
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}
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func unEscape(r []rune, isEscaped bool) string {
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if !isEscaped {
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return string(r)
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}
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buf := bytes.NewBuffer(make([]byte, 0, len(r)))
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for i := 0; i < len(r); {
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switch r[i] {
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case '\\':
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i++
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var c byte
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switch r[i] {
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case 't':
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c = '\t'
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case 'b':
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c = '\b'
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case 'n':
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c = '\n'
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case 'r':
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c = '\r'
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case 'f':
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c = '\f'
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case '"':
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c = '"'
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case '\'':
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c = '\''
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case '\\':
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c = '\\'
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case 'u':
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rc, err := strconv.ParseInt(string(r[i+1:i+5]), 16, 32)
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if err != nil {
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panic(fmt.Errorf("internal parser error: %v", err))
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}
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buf.WriteRune(rune(rc))
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i += 5
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continue
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case 'U':
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rc, err := strconv.ParseInt(string(r[i+1:i+9]), 16, 32)
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if err != nil {
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panic(fmt.Errorf("internal parser error: %v", err))
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}
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buf.WriteRune(rune(rc))
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i += 9
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continue
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}
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buf.WriteByte(c)
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default:
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buf.WriteRune(r[i])
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}
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i++
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}
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return buf.String()
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}
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