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// Copyright (c) 2014 Couchbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package analysis
import (
"bufio"
"bytes"
"io"
"io/ioutil"
"strings"
)
type TokenMap map[string]bool
func NewTokenMap() TokenMap {
return make(TokenMap, 0)
}
// LoadFile reads in a list of tokens from a text file,
// one per line.
// Comments are supported using `#` or `|`
func (t TokenMap) LoadFile(filename string) error {
data, err := ioutil.ReadFile(filename)
if err != nil {
return err
}
return t.LoadBytes(data)
}
// LoadBytes reads in a list of tokens from memory,
// one per line.
// Comments are supported using `#` or `|`
func (t TokenMap) LoadBytes(data []byte) error {
bytesReader := bytes.NewReader(data)
bufioReader := bufio.NewReader(bytesReader)
line, err := bufioReader.ReadString('\n')
for err == nil {
t.LoadLine(line)
line, err = bufioReader.ReadString('\n')
}
// if the err was EOF we still need to process the last value
if err == io.EOF {
t.LoadLine(line)
return nil
}
return err
}
func (t TokenMap) LoadLine(line string) {
// find the start of a comment, if any
startComment := strings.IndexAny(line, "#|")
if startComment >= 0 {
line = line[:startComment]
}
tokens := strings.Fields(line)
for _, token := range tokens {
t.AddToken(token)
}
}
func (t TokenMap) AddToken(token string) {
t[token] = true
}
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