mirror of
https://github.com/go-gitea/gitea
synced 2024-12-29 14:54:32 +01:00
106 lines
2.8 KiB
Go
Vendored
106 lines
2.8 KiB
Go
Vendored
// Copyright (c) 2020 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 index
|
|
|
|
import "reflect"
|
|
|
|
var reflectStaticSizeTokenLocation int
|
|
var reflectStaticSizeTokenFreq int
|
|
|
|
func init() {
|
|
var tl TokenLocation
|
|
reflectStaticSizeTokenLocation = int(reflect.TypeOf(tl).Size())
|
|
var tf TokenFreq
|
|
reflectStaticSizeTokenFreq = int(reflect.TypeOf(tf).Size())
|
|
}
|
|
|
|
// TokenLocation represents one occurrence of a term at a particular location in
|
|
// a field. Start, End and Position have the same meaning as in analysis.Token.
|
|
// Field and ArrayPositions identify the field value in the source document.
|
|
// See document.Field for details.
|
|
type TokenLocation struct {
|
|
Field string
|
|
ArrayPositions []uint64
|
|
Start int
|
|
End int
|
|
Position int
|
|
}
|
|
|
|
func (tl *TokenLocation) Size() int {
|
|
rv := reflectStaticSizeTokenLocation
|
|
rv += len(tl.ArrayPositions) * sizeOfUint64
|
|
return rv
|
|
}
|
|
|
|
// TokenFreq represents all the occurrences of a term in all fields of a
|
|
// document.
|
|
type TokenFreq struct {
|
|
Term []byte
|
|
Locations []*TokenLocation
|
|
frequency int
|
|
}
|
|
|
|
func (tf *TokenFreq) Size() int {
|
|
rv := reflectStaticSizeTokenFreq
|
|
rv += len(tf.Term)
|
|
for _, loc := range tf.Locations {
|
|
rv += loc.Size()
|
|
}
|
|
return rv
|
|
}
|
|
|
|
func (tf *TokenFreq) Frequency() int {
|
|
return tf.frequency
|
|
}
|
|
|
|
func (tf *TokenFreq) SetFrequency(frequency int) {
|
|
tf.frequency = frequency
|
|
}
|
|
|
|
// TokenFrequencies maps document terms to their combined frequencies from all
|
|
// fields.
|
|
type TokenFrequencies map[string]*TokenFreq
|
|
|
|
func (tfs TokenFrequencies) Size() int {
|
|
rv := sizeOfMap
|
|
rv += len(tfs) * (sizeOfString + sizeOfPtr)
|
|
for k, v := range tfs {
|
|
rv += len(k)
|
|
rv += v.Size()
|
|
}
|
|
return rv
|
|
}
|
|
|
|
func (tfs TokenFrequencies) MergeAll(remoteField string, other TokenFrequencies) {
|
|
// walk the new token frequencies
|
|
for tfk, tf := range other {
|
|
// set the remoteField value in incoming token freqs
|
|
for _, l := range tf.Locations {
|
|
l.Field = remoteField
|
|
}
|
|
existingTf, exists := tfs[tfk]
|
|
if exists {
|
|
existingTf.Locations = append(existingTf.Locations, tf.Locations...)
|
|
existingTf.frequency += tf.frequency
|
|
} else {
|
|
tfs[tfk] = &TokenFreq{
|
|
Term: tf.Term,
|
|
frequency: tf.frequency,
|
|
Locations: make([]*TokenLocation, len(tf.Locations)),
|
|
}
|
|
copy(tfs[tfk].Locations, tf.Locations)
|
|
}
|
|
}
|
|
}
|