709 lines
15 KiB
Go
709 lines
15 KiB
Go
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package xregex
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/*
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golang version regex parser
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refer to: https://github.com/aristotle9/as3cc/tree/master/java-template/src/org/lala/lex/utils/parser
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*/
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import (
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"container/list"
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"fmt"
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"strings"
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)
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// Parser golang regex parser
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type Parser struct {
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actionTable []map[int64]int64
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gotoTable map[int64]map[int64]int64
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prodList []*productionItem
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inputTable map[string]int64
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codes []interface{}
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duplCount int64
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num int64
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flags string
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flagsC string
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}
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// Info print parser info.
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func (p *Parser) Info() (s string) {
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s += fmt.Sprintf("actionTable len:%d,", len(p.actionTable))
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s += fmt.Sprintf("prodList len:%d,", len(p.prodList))
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s += fmt.Sprintf("inputTable len:%d,", len(p.inputTable))
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s += fmt.Sprintf("codes len:%d\n", len(p.codes))
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return
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}
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// New return regex parser instance.
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func New() (p *Parser) {
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p = &Parser{}
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var tmp map[int64]int64
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p.actionTable = make([]map[int64]int64, 0)
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p.actionTable = append(p.actionTable, nil)
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tmp = make(map[int64]int64)
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tmp[0x20] = 0x4
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tmp[0x21] = 0x18
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x6] = 0x1
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tmp[0x7] = 0x2
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tmp[0x8] = 0x1C
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tmp[0x2A] = 0x24
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0x27] = 0x6
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x1A
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tmp[0x15] = 0xE
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tmp[0x16] = 0x8
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x1D] = 0xA
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x0] = 0x5
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tmp[0x21] = 0x18
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x2C] = 0x22
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tmp[0x8] = 0x1C
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tmp[0x9] = 0x2F
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tmp[0x2A] = 0x24
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x1A
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x1D] = 0xA
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x21] = 0x18
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0x21
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tmp[0x8] = 0x1C
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tmp[0x9] = 0x21
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tmp[0xA] = 0x21
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x1A
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x2A] = 0x24
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tmp[0x1D] = 0xA
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x0] = 0x7
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tmp[0x1] = 0x7
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tmp[0x2] = 0x7
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0x7
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tmp[0x8] = 0x1C
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tmp[0x9] = 0x7
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tmp[0xA] = 0x7
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0xF] = 0x7
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x1A
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x2A] = 0x24
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tmp[0x21] = 0x18
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tmp[0x1D] = 0x7
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x21] = 0x18
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x2C] = 0x22
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tmp[0x8] = 0x1C
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tmp[0xA] = 0x31
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x1A
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x2A] = 0x24
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tmp[0x1D] = 0xA
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x21] = 0x18
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0x23
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tmp[0x8] = 0x1C
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tmp[0x9] = 0x23
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tmp[0xA] = 0x23
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x23
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x2A] = 0x24
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tmp[0x1D] = 0x23
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x21] = 0x18
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0x25
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tmp[0x8] = 0x1C
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tmp[0x9] = 0x25
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tmp[0xA] = 0x25
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x25
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x2A] = 0x24
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tmp[0x1D] = 0x25
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x21] = 0x18
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0x27
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tmp[0x8] = 0x1C
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tmp[0x9] = 0x27
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tmp[0xA] = 0x27
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x27
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x2A] = 0x24
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tmp[0x1D] = 0x27
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x0] = 0x9
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tmp[0x1] = 0x9
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tmp[0x2] = 0x9
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0x9
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tmp[0x8] = 0x1C
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tmp[0x9] = 0x9
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tmp[0xA] = 0x9
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0xF] = 0x9
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x1A
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x2A] = 0x24
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tmp[0x21] = 0x18
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tmp[0x1D] = 0x9
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x28] = 0x26
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tmp[0x22] = 0x2C
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tmp[0x1C] = 0x28
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tmp[0x5] = 0x30
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tmp[0x18] = 0x45
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tmp[0x1B] = 0x2E
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tmp[0xC] = 0x2E
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tmp[0xD] = 0x2A
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tmp[0xE] = 0x37
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x3] = 0x19
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x21] = 0x18
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0x29
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tmp[0x8] = 0x1C
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tmp[0x9] = 0x29
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tmp[0xA] = 0x29
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tmp[0x2B] = 0x20
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tmp[0x24] = 0x1E
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x29
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tmp[0x15] = 0xE
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tmp[0x17] = 0xC
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tmp[0x1A] = 0x16
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tmp[0x2A] = 0x24
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tmp[0x1D] = 0x29
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x1F] = 0x4F
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tmp[0x25] = 0x55
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tmp[0x13] = 0x3F
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x29] = 0x5B
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tmp[0x25] = 0x57
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tmp[0x1E] = 0x4B
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tmp[0x26] = 0x59
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x1E] = 0x4D
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tmp[0x13] = 0x41
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x0] = 0xB
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tmp[0x1] = 0xB
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tmp[0x2] = 0xB
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tmp[0x3] = 0x1B
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0xB
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tmp[0x8] = 0x1C
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tmp[0x9] = 0xB
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tmp[0xA] = 0xB
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tmp[0xB] = 0x1B
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tmp[0xC] = 0x2E
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tmp[0xD] = 0x2A
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tmp[0xE] = 0x39
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tmp[0xF] = 0xB
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tmp[0x10] = 0x10
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tmp[0x11] = 0x12
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tmp[0x12] = 0x14
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tmp[0x14] = 0x1A
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tmp[0x15] = 0xE
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tmp[0x16] = 0x8
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tmp[0x17] = 0xC
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tmp[0x18] = 0x39
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tmp[0x19] = 0x47
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tmp[0x1A] = 0x16
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tmp[0x1B] = 0x2E
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tmp[0x1C] = 0x28
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tmp[0x1D] = 0xB
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tmp[0x20] = 0xB
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tmp[0x21] = 0x18
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tmp[0x22] = 0x2C
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tmp[0x23] = 0x53
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tmp[0x24] = 0x1E
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tmp[0x27] = 0x6
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tmp[0x28] = 0x26
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tmp[0x2A] = 0x24
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tmp[0x2B] = 0x20
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tmp[0x2C] = 0x22
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0xC] = 0x35
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tmp[0x1B] = 0x49
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p.actionTable = append(p.actionTable, tmp)
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tmp = make(map[int64]int64)
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tmp[0x0] = 0xD
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tmp[0x1] = 0xD
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tmp[0x2] = 0xD
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tmp[0x3] = 0xD
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tmp[0x4] = 0x2E
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tmp[0x5] = 0x30
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tmp[0x7] = 0xD
|
||
|
|
tmp[0x8] = 0x1C
|
||
|
|
tmp[0x9] = 0xD
|
||
|
|
tmp[0xA] = 0xD
|
||
|
|
tmp[0xB] = 0xD
|
||
|
|
tmp[0xC] = 0x2E
|
||
|
|
tmp[0xD] = 0x2A
|
||
|
|
tmp[0xE] = 0xD
|
||
|
|
tmp[0xF] = 0xD
|
||
|
|
tmp[0x10] = 0x10
|
||
|
|
tmp[0x11] = 0x12
|
||
|
|
tmp[0x12] = 0x14
|
||
|
|
tmp[0x14] = 0x1A
|
||
|
|
tmp[0x15] = 0xE
|
||
|
|
tmp[0x16] = 0x8
|
||
|
|
tmp[0x17] = 0xC
|
||
|
|
tmp[0x18] = 0xD
|
||
|
|
tmp[0x1A] = 0x16
|
||
|
|
tmp[0x1B] = 0x2E
|
||
|
|
tmp[0x1C] = 0x28
|
||
|
|
tmp[0x1D] = 0xD
|
||
|
|
tmp[0x20] = 0xD
|
||
|
|
tmp[0x21] = 0x18
|
||
|
|
tmp[0x22] = 0x2C
|
||
|
|
tmp[0x24] = 0x1E
|
||
|
|
tmp[0x27] = 0x6
|
||
|
|
tmp[0x28] = 0x26
|
||
|
|
tmp[0x2A] = 0x24
|
||
|
|
tmp[0x2B] = 0x20
|
||
|
|
tmp[0x2C] = 0x22
|
||
|
|
p.actionTable = append(p.actionTable, tmp)
|
||
|
|
p.gotoTable = make(map[int64]map[int64]int64)
|
||
|
|
tmp = make(map[int64]int64)
|
||
|
|
tmp[0xB] = 0x33
|
||
|
|
tmp[0x3] = 0x1F
|
||
|
|
p.gotoTable[0x18] = tmp
|
||
|
|
tmp = make(map[int64]int64)
|
||
|
|
tmp[0x0] = 0xF
|
||
|
|
p.gotoTable[0x13] = tmp
|
||
|
|
tmp = make(map[int64]int64)
|
||
|
|
tmp[0x0] = 0x11
|
||
|
|
tmp[0x1] = 0x15
|
||
|
|
tmp[0x2] = 0x17
|
||
|
|
tmp[0x14] = 0x2B
|
||
|
|
tmp[0x7] = 0x2B
|
||
|
|
tmp[0x9] = 0x2B
|
||
|
|
tmp[0xA] = 0x2B
|
||
|
|
tmp[0x1D] = 0x2B
|
||
|
|
tmp[0xF] = 0x3D
|
||
|
|
p.gotoTable[0x14] = tmp
|
||
|
|
tmp = make(map[int64]int64)
|
||
|
|
tmp[0x16] = 0x43
|
||
|
|
p.gotoTable[0x15] = tmp
|
||
|
|
tmp = make(map[int64]int64)
|
||
|
|
tmp[0x0] = 0x13
|
||
|
|
tmp[0x1] = 0x13
|
||
|
|
tmp[0x2] = 0x13
|
||
|
|
tmp[0x3] = 0x1D
|
||
|
|
tmp[0x7] = 0x13
|
||
|
|
tmp[0x20] = 0x51
|
||
|
|
tmp[0x9] = 0x13
|
||
|
|
tmp[0xA] = 0x13
|
||
|
|
tmp[0xB] = 0x1D
|
||
|
|
tmp[0xE] = 0x3B
|
||
|
|
tmp[0xF] = 0x13
|
||
|
|
tmp[0x14] = 0x13
|
||
|
|
tmp[0x18] = 0x3B
|
||
|
|
tmp[0x1D] = 0x13
|
||
|
|
p.gotoTable[0x16] = tmp
|
||
|
|
tmp = make(map[int64]int64)
|
||
|
|
tmp[0x9] = 0x2D
|
||
|
|
tmp[0xA] = 0x2D
|
||
|
|
tmp[0x14] = 0x2D
|
||
|
|
tmp[0x1D] = 0x2D
|
||
|
|
tmp[0x7] = 0x2D
|
||
|
|
p.gotoTable[0x17] = tmp
|
||
|
|
p.prodList = []*productionItem{{0x19, 0x2}, {0x13, 0x1},
|
||
|
|
{0x13, 0x4}, {0x15, 0x2}, {0x15, 0x0},
|
||
|
|
{0x14, 0x3}, {0x14, 0x3}, {0x14, 0x2},
|
||
|
|
{0x14, 0x2}, {0x14, 0x2}, {0x14, 0x2},
|
||
|
|
{0x14, 0x3}, {0x14, 0x4}, {0x14, 0x2},
|
||
|
|
{0x14, 0x1}, {0x17, 0x3}, {0x17, 0x4},
|
||
|
|
{0x17, 0x5}, {0x17, 0x4}, {0x18, 0x4},
|
||
|
|
{0x18, 0x2}, {0x18, 0x1}, {0x18, 0x3},
|
||
|
|
{0x16, 0x1}, {0x16, 0x1}}
|
||
|
|
p.inputTable = make(map[string]int64)
|
||
|
|
p.inputTable["/"] = 0x2
|
||
|
|
p.inputTable["["] = 0x9
|
||
|
|
p.inputTable["escc"] = 0x12
|
||
|
|
p.inputTable["]"] = 0xA
|
||
|
|
p.inputTable["("] = 0x4
|
||
|
|
p.inputTable["{"] = 0xC
|
||
|
|
p.inputTable["^"] = 0xB
|
||
|
|
p.inputTable[")"] = 0x5
|
||
|
|
p.inputTable["|"] = 0x3
|
||
|
|
p.inputTable["?"] = 0x8
|
||
|
|
p.inputTable["}"] = 0xE
|
||
|
|
p.inputTable["+"] = 0x7
|
||
|
|
p.inputTable["*"] = 0x6
|
||
|
|
p.inputTable[","] = 0xF
|
||
|
|
p.inputTable["<$>"] = 0x1
|
||
|
|
p.inputTable["-"] = 0x11
|
||
|
|
p.inputTable["c"] = 0x10
|
||
|
|
p.inputTable["d"] = 0xD
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p *Parser) put(data interface{}) error {
|
||
|
|
if fmt.Sprint(data) == "dupl" {
|
||
|
|
p.duplCount++
|
||
|
|
if p.duplCount > 100 {
|
||
|
|
return fmt.Errorf("dupl commands over 100")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p *Parser) parse(lx *lexer) (ret interface{}, err error) {
|
||
|
|
var (
|
||
|
|
act int64
|
||
|
|
token string
|
||
|
|
tokenID int64
|
||
|
|
state int64
|
||
|
|
actObj int64
|
||
|
|
stateStack = list.New()
|
||
|
|
outputStack []interface{}
|
||
|
|
)
|
||
|
|
stateStack.PushBack(uint(0))
|
||
|
|
for {
|
||
|
|
if token, err = lx.getToken(); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
tokenID = p.inputTable[token]
|
||
|
|
state = int64(stateStack.Front().Value.(uint))
|
||
|
|
actObj = p.actionTable[tokenID][state]
|
||
|
|
if actObj == 0 {
|
||
|
|
err = fmt.Errorf("Parse Error: %s", lx.getPositionInfo())
|
||
|
|
return
|
||
|
|
}
|
||
|
|
act = actObj
|
||
|
|
if act == 1 {
|
||
|
|
ret = outputStack[len(outputStack)-1]
|
||
|
|
return
|
||
|
|
} else if (act & 1) == 1 {
|
||
|
|
outputStack = append(outputStack, lx.yyText)
|
||
|
|
stateStack.PushFront(uint(act)>>1 - 1)
|
||
|
|
lx.advanced = true
|
||
|
|
} else if (act & 1) == 0 {
|
||
|
|
pi := uint(act) >> 1
|
||
|
|
length := p.prodList[pi].bodyLength
|
||
|
|
var result interface{}
|
||
|
|
if length > 0 {
|
||
|
|
result = outputStack[int64(len(outputStack))-length]
|
||
|
|
}
|
||
|
|
switch pi {
|
||
|
|
case 0x1:
|
||
|
|
result = p.codes
|
||
|
|
case 0x2:
|
||
|
|
result = p.codes
|
||
|
|
case 0x3:
|
||
|
|
p.flagsC = outputStack[len(outputStack)-1].(string)
|
||
|
|
if !strings.Contains(p.flags, p.flagsC) {
|
||
|
|
err = fmt.Errorf("Flag Repeated:%s", lx.getPositionInfo())
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if !strings.Contains("igm", p.flagsC) {
|
||
|
|
err = fmt.Errorf("Unknow Flag:%s", lx.getPositionInfo())
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.flags += p.flagsC
|
||
|
|
case 0x4:
|
||
|
|
case 0x5:
|
||
|
|
if err = p.put("or"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0x6:
|
||
|
|
case 0x7:
|
||
|
|
case 0x8:
|
||
|
|
if err = p.put("star"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0x9:
|
||
|
|
if err = p.put("more"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0xA:
|
||
|
|
if err = p.put("ask"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0xB:
|
||
|
|
if err = p.put([]interface{}{"include", outputStack[len(outputStack)-2]}); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0xC:
|
||
|
|
if err = p.put([]interface{}{"exclude", outputStack[len(outputStack)-2]}); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0xD:
|
||
|
|
if err = p.put("cat"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0xE:
|
||
|
|
if err = p.put("single"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0xF:
|
||
|
|
p.num = (outputStack[len(outputStack)-2]).(int64) - 1
|
||
|
|
for p.num > 0 {
|
||
|
|
if err = p.put("dupl"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
p.num = (outputStack[len(outputStack)-2]).(int64) - 1
|
||
|
|
for p.num > 0 {
|
||
|
|
if err = p.put("cat"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
case 0x10:
|
||
|
|
if err = p.put("ask"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num = (outputStack[len(outputStack)-2]).(int64) - 1
|
||
|
|
for p.num > 0 {
|
||
|
|
if err = p.put("dupl"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
p.num = (outputStack[len(outputStack)-2]).(int64) - 1
|
||
|
|
for p.num > 0 {
|
||
|
|
if err = p.put("cat"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
case 0x11:
|
||
|
|
p.num = (outputStack[len(outputStack)-4]).(int64) - 1
|
||
|
|
for p.num > 0 {
|
||
|
|
if err = p.put("dupl"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
p.num = (outputStack[len(outputStack)-2]).(int64) - (outputStack[len(outputStack)-4]).(int64)
|
||
|
|
if p.num > 0 {
|
||
|
|
if err = p.put("dupl"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if err = p.put("ask"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
for p.num > 1 {
|
||
|
|
if err = p.put("dupl"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
}
|
||
|
|
p.num = (outputStack[len(outputStack)-2]).(int64) - 1
|
||
|
|
for p.num > 0 {
|
||
|
|
if err = p.put("cat"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
case 0x12:
|
||
|
|
p.num = (outputStack[len(outputStack)-3]).(int64)
|
||
|
|
for p.num > 0 {
|
||
|
|
if err = p.put("dupl"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
if err = p.put("star"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num = (outputStack[len(outputStack)-3]).(int64)
|
||
|
|
for p.num > 0 {
|
||
|
|
if err = p.put("cat"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
p.num--
|
||
|
|
}
|
||
|
|
case 0x13:
|
||
|
|
p.num = (outputStack[len(outputStack)-4]).(int64)
|
||
|
|
result = p.num + 1
|
||
|
|
if err = p.put([]interface{}{"c", (outputStack[len(outputStack)-3])}); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if err = p.put([]interface{}{"c", (outputStack[len(outputStack)-1])}); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if err = p.put("range"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0x14:
|
||
|
|
p.num = (outputStack[len(outputStack)-2]).(int64)
|
||
|
|
result = p.num + 1
|
||
|
|
if err = p.put("single"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0x15:
|
||
|
|
if err = p.put("single"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
result = int64(1)
|
||
|
|
case 0x16:
|
||
|
|
if err = p.put([]interface{}{"c", (outputStack[len(outputStack)-3])}); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if err = p.put([]interface{}{"c", (outputStack[len(outputStack)-1])}); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if err = p.put("range"); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
result = int64(1)
|
||
|
|
case 0x17:
|
||
|
|
if err = p.put([]interface{}{"c", (outputStack[len(outputStack)-1])}); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
case 0x18:
|
||
|
|
if "\\c" == outputStack[len(outputStack)-1].(string) {
|
||
|
|
err = fmt.Errorf("Control Character:%s", lx.getPositionInfo())
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if err = p.put([]interface{}{"escc", (outputStack[len(outputStack)-1])}); err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/** actions applying end **/
|
||
|
|
var j int64
|
||
|
|
var e *list.Element
|
||
|
|
for j < length {
|
||
|
|
e = stateStack.Front()
|
||
|
|
stateStack.Remove(e)
|
||
|
|
outputStack = outputStack[:len(outputStack)-1]
|
||
|
|
j++
|
||
|
|
}
|
||
|
|
state = int64(stateStack.Front().Value.(uint))
|
||
|
|
actObj = p.gotoTable[p.prodList[pi].headerID][state]
|
||
|
|
if actObj == 0 {
|
||
|
|
err = fmt.Errorf("goto error! %s", lx.getPositionInfo())
|
||
|
|
return
|
||
|
|
}
|
||
|
|
act = actObj
|
||
|
|
stateStack.PushFront(uint(act)>>1 - 1)
|
||
|
|
outputStack = append(outputStack, result)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse parse input string.
|
||
|
|
func (p *Parser) Parse(source string) (result interface{}, err error) {
|
||
|
|
defer func() {
|
||
|
|
if e := recover(); e != nil {
|
||
|
|
err = fmt.Errorf("panic:%v", e)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
if source == "" {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
lx := newLexer()
|
||
|
|
lx.setSource(source)
|
||
|
|
return p.parse(lx)
|
||
|
|
}
|