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43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package colltab
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// testWeighter is a simple Weighter that returns weights from a user-defined map.
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type testWeighter map[string][]Elem
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func (t testWeighter) Start(int, []byte) int { return 0 }
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func (t testWeighter) StartString(int, string) int { return 0 }
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func (t testWeighter) Domain() []string { return nil }
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func (t testWeighter) Top() uint32 { return 0 }
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// maxContractBytes is the maximum length of any key in the map.
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const maxContractBytes = 10
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func (t testWeighter) AppendNext(buf []Elem, s []byte) ([]Elem, int) {
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n := len(s)
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if n > maxContractBytes {
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n = maxContractBytes
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}
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for i := n; i > 0; i-- {
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if e, ok := t[string(s[:i])]; ok {
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return append(buf, e...), i
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}
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}
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panic("incomplete testWeighter: could not find " + string(s))
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}
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func (t testWeighter) AppendNextString(buf []Elem, s string) ([]Elem, int) {
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n := len(s)
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if n > maxContractBytes {
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n = maxContractBytes
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}
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for i := n; i > 0; i-- {
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if e, ok := t[s[:i]]; ok {
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return append(buf, e...), i
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}
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}
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panic("incomplete testWeighter: could not find " + s)
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}
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