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