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62 lines
1.4 KiB
62 lines
1.4 KiB
// Copyright (c) 2017 Couchbase, Inc.
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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 regexp
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import "fmt"
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// instOp represents a instruction operation
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type instOp int
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// the enumeration of operations
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const (
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OpMatch instOp = iota
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OpJmp
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OpSplit
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OpRange
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)
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// instSize is the approximate size of the an inst struct in bytes
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const instSize = 40
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type inst struct {
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op instOp
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to uint
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splitA uint
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splitB uint
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rangeStart byte
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rangeEnd byte
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}
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func (i *inst) String() string {
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switch i.op {
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case OpJmp:
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return fmt.Sprintf("JMP: %d", i.to)
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case OpSplit:
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return fmt.Sprintf("SPLIT: %d - %d", i.splitA, i.splitB)
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case OpRange:
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return fmt.Sprintf("RANGE: %x - %x", i.rangeStart, i.rangeEnd)
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}
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return "MATCH"
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}
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type prog []*inst
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func (p prog) String() string {
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rv := "\n"
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for i, pi := range p {
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rv += fmt.Sprintf("%d %v\n", i, pi)
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}
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return rv
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}
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