forked from x/ContextOS
494 lines
12 KiB
Go
494 lines
12 KiB
Go
package yac // {{{
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// }}}
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import ( // {{{
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"contexts"
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"fmt"
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"strconv"
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)
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// }}}
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type Seed struct {
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page int
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hash int
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word []string
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}
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type State struct {
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next int
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star int
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hash int
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}
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type Point struct {
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s int
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c byte
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}
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type YAC struct {
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seed []*Seed
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page map[string]int
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word map[int]string
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hash map[string]int
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hand map[int]string
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mat []map[byte]*State
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state map[State]*State
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*ctx.Message
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*ctx.Context
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}
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func (yac *YAC) name(page int) string { // {{{
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if name, ok := yac.word[page]; ok {
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return name
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}
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return fmt.Sprintf("yac%d", page)
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}
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// }}}
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func (yac *YAC) train(m *ctx.Message, page, hash int, word []string) (int, []*Point, []*Point) { // {{{
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ss := []int{page}
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sn := make([]bool, yac.Capi("nline"))
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points := []*Point{}
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ends := []*Point{}
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for i, n, mul := 0, 1, false; i < len(word); i += n {
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if !mul {
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if hash <= 0 && word[i] == "}" {
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return i + 2, points, ends
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}
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ends = ends[:0]
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}
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for _, s := range ss {
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switch word[i] {
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case "opt{", "rep{":
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sn[s] = true
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num, point, end := yac.train(m, s, 0, word[i+1:])
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n, points = num, append(points, point...)
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for _, x := range end {
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state := &State{}
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*state = *yac.mat[x.s][x.c]
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for i := len(sn); i <= state.next; i++ {
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sn = append(sn, false)
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}
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sn[state.next] = true
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points = append(points, x)
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if word[i] == "rep{" {
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state.star = s
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yac.mat[x.s][x.c] = state
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yac.Log("debug", "REP(%d, %d): %v", x.s, x.c, state)
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}
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}
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case "mul{":
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mul, n = true, 1
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goto next
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case "}":
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if mul {
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mul = false
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goto next
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}
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fallthrough
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default:
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x, ok := yac.page[word[i]]
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if !ok {
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if x = m.Sess("lex").Cmd("parse", word[i], yac.name(s)).Resulti(0); x == 0 {
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x = m.Sess("lex").Cmd("train", word[i], len(yac.mat[s]), yac.name(s)).Resulti(0)
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}
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}
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c := byte(x)
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state := &State{}
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if yac.mat[s][c] != nil {
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*state = *yac.mat[s][c]
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} else {
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yac.Capi("nnode", 1)
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}
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yac.Log("debug", "GET(%d, %d): %v \033[31m(%s)\033[0m", s, c, state, word[i])
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if state.next == 0 {
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state.next = yac.Capi("nline", 1) - 1
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yac.mat = append(yac.mat, map[byte]*State{})
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for i := 0; i < yac.Capi("nlang"); i++ {
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yac.mat[state.next][byte(i)] = nil
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}
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sn = append(sn, false)
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}
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sn[state.next] = true
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yac.mat[s][c] = state
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ends = append(ends, &Point{s, c})
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points = append(points, &Point{s, c})
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yac.Log("debug", "SET(%d, %d): %v", s, c, state)
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}
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}
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next:
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if !mul {
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ss = ss[:0]
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for s, b := range sn {
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if sn[s] = false; b {
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ss = append(ss, s)
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}
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}
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}
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}
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for _, s := range ss {
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if s < yac.Capi("nlang") || s >= len(yac.mat) {
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continue
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}
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void := true
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for _, x := range yac.mat[s] {
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if x != nil {
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void = false
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break
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}
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}
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if void {
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yac.Log("debug", "DEL: %d-%d", yac.Capi("nline")-1, yac.Capi("nline", 0, s))
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yac.mat = yac.mat[:s]
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}
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}
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for _, s := range ss {
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for _, p := range points {
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state := &State{}
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*state = *yac.mat[p.s][p.c]
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if state.next == s {
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yac.Log("debug", "GET(%d, %d): %v", p.s, p.c, state)
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if state.next >= len(yac.mat) {
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state.next = 0
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}
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if hash > 0 {
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state.hash = hash
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}
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yac.mat[p.s][p.c] = state
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yac.Log("debug", "SET(%d, %d): %v", p.s, p.c, state)
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}
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if x, ok := yac.state[*state]; !ok {
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yac.state[*state] = yac.mat[p.s][p.c]
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yac.Capi("nreal", 1)
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} else {
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yac.mat[p.s][p.c] = x
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}
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}
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}
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return len(word), points, ends
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}
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// }}}
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func (yac *YAC) parse(m *ctx.Message, out *ctx.Message, page int, void int, line string, level int) (string, []string) { // {{{
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if m.Confs("debug") {
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m.Log("debug", "%s\\%d %s(%d): %s", m.Conf("label")[0:level], level, yac.name(page), page, line)
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}
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hash, word := 0, []string{}
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for star, s := 0, page; s != 0 && len(line) > 0; {
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//解析空白
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lex := m.Sess("lex")
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lex.Cmd("parse", line, yac.name(void))
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if lex.Result(0) == "-1" {
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break
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}
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//解析单词
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line = lex.Result(1)
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lex = m.Sess("lex")
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lex.Cmd("parse", line, yac.name(s))
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if lex.Result(0) == "-1" {
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break
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}
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//解析状态
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c := byte(lex.Resulti(0))
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state := yac.mat[s][c]
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if state != nil { //全局语法检查
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if key := m.Sess("lex").Cmd("parse", line, "key"); key.Resulti(0) == 0 || len(key.Result(2)) <= len(lex.Result(2)) {
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line, word = lex.Result(1), append(word, lex.Result(2))
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} else {
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state = nil
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}
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}
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if state == nil { //嵌套语法递归解析
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for i := 0; i < m.Capi("ncell"); i++ {
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if x := yac.mat[s][byte(i)]; i < m.Capi("nlang") && x != nil {
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if l, w := yac.parse(m, out, i, void, line, level+1); l != line {
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line, word = l, append(word, w...)
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state = x
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break
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}
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}
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}
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}
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if state == nil { //语法切换
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s, star = star, 0
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continue
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}
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if s, star, hash = state.next, state.star, state.hash; s == 0 { //状态切换
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s, star = star, 0
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}
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}
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if hash == 0 {
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word = word[:0]
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} else { //执行命令
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msg := out.Spawn(m.Source()).Add("detail", yac.hand[hash], word)
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if m.Back(msg); msg.Hand { //命令替换
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m.Assert(!msg.Has("return"))
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word = msg.Meta["result"]
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}
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}
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if m.Confs("debug") {
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m.Log("debug", "%s/%d %s(%d): %v", m.Conf("label")[0:level], level, yac.name(page), page, word)
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}
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return line, word
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}
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// }}}
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func (yac *YAC) Spawn(m *ctx.Message, c *ctx.Context, arg ...string) ctx.Server { // {{{
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yac.Message = m
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c.Caches = map[string]*ctx.Cache{}
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c.Configs = map[string]*ctx.Config{}
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if len(arg) > 0 && arg[0] == "parse" {
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return yac
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}
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s := new(YAC)
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s.Context = c
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return s
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}
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// }}}
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func (yac *YAC) Begin(m *ctx.Message, arg ...string) ctx.Server { // {{{
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yac.Message = m
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if len(arg) > 0 && arg[0] == "parse" {
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return yac
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}
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yac.Caches["ncell"] = &ctx.Cache{Name: "词法上限", Value: m.Confx("ncell", arg, 0), Help: "词法集合的最大数量"}
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yac.Caches["nlang"] = &ctx.Cache{Name: "语法上限", Value: m.Confx("nlang", arg, 1), Help: "语法集合的最大数量"}
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yac.Caches["nline"] = &ctx.Cache{Name: "状态数量", Value: m.Confx("nlang", arg, 1), Help: "状态机状态的数量"}
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yac.Caches["nnode"] = &ctx.Cache{Name: "节点数量", Value: "0", Help: "状态机连接的逻辑数量"}
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yac.Caches["nreal"] = &ctx.Cache{Name: "实点数量", Value: "0", Help: "状态机连接的存储数量"}
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yac.Caches["nseed"] = &ctx.Cache{Name: "种子数量", Value: "0", Help: "语法模板的数量"}
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yac.Caches["npage"] = &ctx.Cache{Name: "集合数量", Value: "0", Help: "语法集合的数量"}
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yac.Caches["nhash"] = &ctx.Cache{Name: "类型数量", Value: "0", Help: "语句类型的数量"}
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yac.page = map[string]int{"nil": 0}
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yac.word = map[int]string{0: "nil"}
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yac.hash = map[string]int{"nil": 0}
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yac.hand = map[int]string{0: "nil"}
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yac.mat = make([]map[byte]*State, m.Capi("nlang"))
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yac.state = map[State]*State{}
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return yac
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}
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// }}}
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func (yac *YAC) Start(m *ctx.Message, arg ...string) (close bool) { // {{{
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yac.Message = m
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if len(arg) > 0 && arg[0] == "parse" {
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lex := m.Sess("lex")
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if lex.Cap("status") != "start" {
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lex.Target().Start(lex)
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}
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var out *ctx.Message
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data := make(chan string, 1)
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next := make(chan bool, 1)
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close = true
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defer func() {
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if e := recover(); e != nil {
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// m.Option("scan_end", true)
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next <- true
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}
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}()
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//加载文件
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nfs := m.Sess("nfs").Call(func(buf *ctx.Message) *ctx.Message {
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out = buf
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data <- buf.Detail(0) + "; "
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<-next
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return nil
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}, "scan", arg[1], "", "扫描文件")
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// m.Find("log").Cmd("silent", yac.Context.Name, "debug", true)
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//解析循环
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for m.Cap("stream", nfs.Target().Name); !m.Options("scan_end"); next <- true {
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line := <-data
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if len(line) == 0 {
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continue
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}
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_, word := yac.parse(m, out, m.Optioni("page"), m.Optioni("void"), line, 1)
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if len(word) > 0 {
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word = word[:len(word)-1]
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if last := len(word) - 1; last >= 0 && len(word[last]) > 0 && word[last][len(word[last])-1] != '\n' {
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word = append(word, "\n")
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}
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}
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out.Result(0, word)
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}
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return true
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}
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return false
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}
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// }}}
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func (yac *YAC) Close(m *ctx.Message, arg ...string) bool { // {{{
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switch yac.Context {
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case m.Target():
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case m.Source():
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}
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return true
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}
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// }}}
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var Index = &ctx.Context{Name: "yac", Help: "语法中心",
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Caches: map[string]*ctx.Cache{
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"nparse": &ctx.Cache{Name: "nparse", Value: "0", Help: "解析器数量"},
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},
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Configs: map[string]*ctx.Config{
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"debug": &ctx.Config{Name: "debug", Value: "false", Help: "词法集合的最大数量"},
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"ncell": &ctx.Config{Name: "词法上限", Value: "128", Help: "词法集合的最大数量"},
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"nlang": &ctx.Config{Name: "语法上限", Value: "32", Help: "语法集合的最大数量"},
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"label": &ctx.Config{Name: "嵌套标记", Value: "####################", Help: "嵌套层级日志的标记"},
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"yac_name": &ctx.Config{Name: "yac_name", Value: "parse", Help: "模块名", Hand: func(m *ctx.Message, x *ctx.Config, arg ...string) string {
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if len(arg) > 0 { // {{{
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return arg[0]
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}
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return fmt.Sprintf("%s%d", x.Value, m.Capi("nparse", 1))
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// }}}
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}},
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"yac_help": &ctx.Config{Name: "yac_help", Value: "解析模块", Help: "模块帮助"},
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},
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Commands: map[string]*ctx.Command{
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"init": &ctx.Command{Name: "init [ncell [nlang]]", Help: "初始化语法矩阵", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
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if _, ok := m.Target().Server.(*YAC); m.Assert(ok) { // {{{
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s := new(YAC)
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s.Context = m.Target()
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m.Target().Server = s
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m.Target().Begin(m, arg...)
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}
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// }}}
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}},
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"info": &ctx.Command{Name: "info", Help: "查看语法矩阵", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
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if yac, ok := m.Target().Server.(*YAC); m.Assert(ok) { // {{{
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if len(arg) == 0 {
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for i, v := range yac.seed {
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m.Echo("seed: %d %v\n", i, v)
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}
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for i, v := range yac.page {
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m.Echo("page: %s %d\n", i, v)
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}
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for i, v := range yac.hash {
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m.Echo("hash: %s %d\n", i, v)
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}
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for i, v := range yac.state {
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m.Echo("node: %v %v\n", i, v)
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}
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for i, v := range yac.mat {
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for k, v := range v {
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if v != nil {
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m.Echo("node: %s(%d,%d): %v\n", yac.name(i), i, k, v)
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}
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}
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}
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return
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}
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line := yac.mat[yac.page[arg[0]]]
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if i, e := strconv.Atoi(arg[0]); e == nil {
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line = yac.mat[i]
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}
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for i := 0; i < len(line); i++ {
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if v, ok := line[byte(i)]; ok && v != nil {
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m.Echo("(%s, %d): %v\n", arg[0], i, v)
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}
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}
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}
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// }}}
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}},
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"train": &ctx.Command{Name: "train page hash word...", Help: "添加语法规则, page: 语法集合, hash: 语句类型, word: 语法模板", Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
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if yac, ok := m.Target().Server.(*YAC); m.Assert(ok) { // {{{
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page, ok := yac.page[arg[0]]
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if !ok {
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page = m.Capi("npage", 1)
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yac.page[arg[0]] = page
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yac.word[page] = arg[0]
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m.Assert(page < m.Capi("nlang"), "语法集合过多")
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yac.mat[page] = map[byte]*State{}
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for i := 0; i < yac.Capi("nlang"); i++ {
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yac.mat[page][byte(i)] = nil
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}
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}
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hash, ok := yac.hash[arg[1]]
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if !ok {
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hash = m.Capi("nhash", 1)
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yac.hash[arg[1]] = hash
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yac.hand[hash] = arg[1]
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}
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// if m.Sess("lex") == nil {
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// lex := m.Sess("lex", "lex")
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// if lex.Cap("status") == "start" {
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// lex.Start(yac.Context.Name+"lex", "语法词法")
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// } else {
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// lex.Target().Start(lex)
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// }
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// }
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//
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yac.train(m, page, hash, arg[2:])
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yac.seed = append(yac.seed, &Seed{page, hash, arg[2:]})
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yac.Cap("stream", fmt.Sprintf("%d,%s,%s", yac.Capi("nseed", 1), yac.Cap("npage"), yac.Cap("nhash")))
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}
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// }}}
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}},
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"parse": &ctx.Command{
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Name: "parse filename [yac_name [help]] [line line] [void void]",
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Help: "解析文件, filename: yac_name:模块名, yac_help:模块帮助, 文件名, line: 默认语法, void: 默认空白",
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Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
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if yac, ok := m.Target().Server.(*YAC); m.Assert(ok) { // {{{
|
|
m.Optioni("page", yac.page["line"])
|
|
m.Optioni("void", yac.page["void"])
|
|
m.Start(m.Confx("yac_name", arg, 1), m.Confx("yac_help", arg, 2), key, arg[0])
|
|
}
|
|
// }}}
|
|
}},
|
|
},
|
|
}
|
|
|
|
func init() {
|
|
yac := &YAC{}
|
|
yac.Context = Index
|
|
ctx.Index.Register(Index, yac)
|
|
}
|