forked from mirror/glob
682 lines
12 KiB
Go
682 lines
12 KiB
Go
package glob
|
|
|
|
// TODO use constructor with all matchers, and to their structs private
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/gobwas/glob/match"
|
|
"github.com/gobwas/glob/runes"
|
|
"reflect"
|
|
)
|
|
|
|
func optimize(matcher match.Matcher) match.Matcher {
|
|
switch m := matcher.(type) {
|
|
|
|
case match.Any:
|
|
if len(m.Separators) == 0 {
|
|
return match.Super{}
|
|
}
|
|
|
|
case match.AnyOf:
|
|
if len(m.Matchers) == 1 {
|
|
return m.Matchers[0]
|
|
}
|
|
|
|
return m
|
|
|
|
case match.List:
|
|
if m.Not == false && len(m.List) == 1 {
|
|
return match.NewText(string(m.List))
|
|
}
|
|
|
|
return m
|
|
|
|
case match.BTree:
|
|
m.Left = optimize(m.Left)
|
|
m.Right = optimize(m.Right)
|
|
|
|
r, ok := m.Value.(match.Text)
|
|
if !ok {
|
|
return m
|
|
}
|
|
|
|
leftNil := m.Left == nil
|
|
rightNil := m.Right == nil
|
|
|
|
if leftNil && rightNil {
|
|
return match.NewText(r.Str)
|
|
}
|
|
|
|
_, leftSuper := m.Left.(match.Super)
|
|
lp, leftPrefix := m.Left.(match.Prefix)
|
|
|
|
_, rightSuper := m.Right.(match.Super)
|
|
rs, rightSuffix := m.Right.(match.Suffix)
|
|
|
|
if leftSuper && rightSuper {
|
|
return match.Contains{r.Str, false}
|
|
}
|
|
|
|
if leftSuper && rightNil {
|
|
return match.Suffix{r.Str}
|
|
}
|
|
|
|
if rightSuper && leftNil {
|
|
return match.Prefix{r.Str}
|
|
}
|
|
|
|
if leftNil && rightSuffix {
|
|
return match.PrefixSuffix{Prefix: r.Str, Suffix: rs.Suffix}
|
|
}
|
|
|
|
if rightNil && leftPrefix {
|
|
return match.PrefixSuffix{Prefix: lp.Prefix, Suffix: r.Str}
|
|
}
|
|
|
|
return m
|
|
}
|
|
|
|
return matcher
|
|
}
|
|
|
|
func glueMatchers(matchers []match.Matcher) match.Matcher {
|
|
var (
|
|
glued []match.Matcher
|
|
winner match.Matcher
|
|
)
|
|
maxLen := -1
|
|
|
|
if m := glueAsEvery(matchers); m != nil {
|
|
glued = append(glued, m)
|
|
return m
|
|
}
|
|
|
|
if m := glueAsRow(matchers); m != nil {
|
|
glued = append(glued, m)
|
|
return m
|
|
}
|
|
|
|
for _, g := range glued {
|
|
if l := g.Len(); l > maxLen {
|
|
maxLen = l
|
|
winner = g
|
|
}
|
|
}
|
|
|
|
return winner
|
|
}
|
|
|
|
func glueAsRow(matchers []match.Matcher) match.Matcher {
|
|
if len(matchers) <= 1 {
|
|
return nil
|
|
}
|
|
|
|
var (
|
|
c []match.Matcher
|
|
l int
|
|
)
|
|
for _, matcher := range matchers {
|
|
if ml := matcher.Len(); ml == -1 {
|
|
return nil
|
|
} else {
|
|
c = append(c, matcher)
|
|
l += ml
|
|
}
|
|
}
|
|
|
|
return match.NewRow(c, l)
|
|
}
|
|
|
|
func glueAsEvery(matchers []match.Matcher) match.Matcher {
|
|
if len(matchers) <= 1 {
|
|
return nil
|
|
}
|
|
|
|
var (
|
|
hasAny bool
|
|
hasSuper bool
|
|
hasSingle bool
|
|
min int
|
|
separator []rune
|
|
)
|
|
|
|
for i, matcher := range matchers {
|
|
var sep []rune
|
|
|
|
switch m := matcher.(type) {
|
|
case match.Super:
|
|
sep = []rune{}
|
|
hasSuper = true
|
|
|
|
case match.Any:
|
|
sep = m.Separators
|
|
hasAny = true
|
|
|
|
case match.Single:
|
|
sep = m.Separators
|
|
hasSingle = true
|
|
min++
|
|
|
|
case match.List:
|
|
if !m.Not {
|
|
return nil
|
|
}
|
|
sep = m.List
|
|
hasSingle = true
|
|
min++
|
|
|
|
default:
|
|
return nil
|
|
}
|
|
|
|
// initialize
|
|
if i == 0 {
|
|
separator = sep
|
|
}
|
|
|
|
if runes.Equal(sep, separator) {
|
|
continue
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
if hasSuper && !hasAny && !hasSingle {
|
|
return match.Super{}
|
|
}
|
|
|
|
if hasAny && !hasSuper && !hasSingle {
|
|
return match.Any{separator}
|
|
}
|
|
|
|
if (hasAny || hasSuper) && min > 0 && len(separator) == 0 {
|
|
return match.Min{min}
|
|
}
|
|
|
|
every := match.EveryOf{}
|
|
|
|
if min > 0 {
|
|
every.Add(match.Min{min})
|
|
|
|
if !hasAny && !hasSuper {
|
|
every.Add(match.Max{min})
|
|
}
|
|
}
|
|
|
|
if len(separator) > 0 {
|
|
every.Add(match.Contains{string(separator), true})
|
|
}
|
|
|
|
return every
|
|
}
|
|
|
|
func minimizeMatchers(matchers []match.Matcher) []match.Matcher {
|
|
var done match.Matcher
|
|
var left, right, count int
|
|
|
|
for l := 0; l < len(matchers); l++ {
|
|
for r := len(matchers); r > l; r-- {
|
|
if glued := glueMatchers(matchers[l:r]); glued != nil {
|
|
var swap bool
|
|
|
|
if done == nil {
|
|
swap = true
|
|
} else {
|
|
cl, gl := done.Len(), glued.Len()
|
|
swap = cl > -1 && gl > -1 && gl > cl
|
|
swap = swap || count < r-l
|
|
}
|
|
|
|
if swap {
|
|
done = glued
|
|
left = l
|
|
right = r
|
|
count = r - l
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if done == nil {
|
|
return matchers
|
|
}
|
|
|
|
next := append(append([]match.Matcher{}, matchers[:left]...), done)
|
|
if right < len(matchers) {
|
|
next = append(next, matchers[right:]...)
|
|
}
|
|
|
|
if len(next) == len(matchers) {
|
|
return next
|
|
}
|
|
|
|
return minimizeMatchers(next)
|
|
}
|
|
|
|
func minimizeAnyOf(children []node) node {
|
|
var nodes [][]node
|
|
var min int
|
|
var idx int
|
|
for i, desc := range children {
|
|
pat, ok := desc.(*nodePattern)
|
|
if !ok {
|
|
return nil
|
|
}
|
|
|
|
n := pat.children()
|
|
ln := len(n)
|
|
if len(nodes) == 0 || (ln < min) {
|
|
min = ln
|
|
idx = i
|
|
}
|
|
|
|
nodes = append(nodes, pat.children())
|
|
}
|
|
|
|
minNodes := nodes[idx]
|
|
if idx+1 < len(nodes) {
|
|
nodes = append(nodes[:idx], nodes[idx+1:]...)
|
|
} else {
|
|
nodes = nodes[:idx]
|
|
}
|
|
|
|
var commonLeft []node
|
|
var commonLeftCount int
|
|
for i, n := range minNodes {
|
|
has := true
|
|
for _, t := range nodes {
|
|
if !reflect.DeepEqual(n, t[i]) {
|
|
has = false
|
|
break
|
|
}
|
|
}
|
|
|
|
if has {
|
|
commonLeft = append(commonLeft, n)
|
|
commonLeftCount++
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
|
|
var commonRight []node
|
|
var commonRightCount int
|
|
for i := min - 1; i > commonLeftCount-1; i-- {
|
|
n := minNodes[i]
|
|
has := true
|
|
for _, t := range nodes {
|
|
if !reflect.DeepEqual(n, t[len(t)-(min-i)]) {
|
|
has = false
|
|
break
|
|
}
|
|
}
|
|
|
|
if has {
|
|
commonRight = append(commonRight, n)
|
|
commonRightCount++
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
|
|
if commonLeftCount == 0 && commonRightCount == 0 {
|
|
return nil
|
|
}
|
|
|
|
nodes = append(nodes, minNodes)
|
|
nodes[len(nodes)-1], nodes[idx] = nodes[idx], nodes[len(nodes)-1]
|
|
|
|
var result []node
|
|
if commonLeftCount > 0 {
|
|
result = append(result, &nodePattern{nodeImpl: nodeImpl{desc: commonLeft}})
|
|
}
|
|
|
|
var anyOf []node
|
|
for _, n := range nodes {
|
|
if commonLeftCount+commonRightCount == len(n) {
|
|
anyOf = append(anyOf, nil)
|
|
} else {
|
|
anyOf = append(anyOf, &nodePattern{nodeImpl: nodeImpl{desc: n[commonLeftCount : len(n)-commonRightCount]}})
|
|
}
|
|
}
|
|
|
|
anyOf = uniqueNodes(anyOf)
|
|
if len(anyOf) == 1 {
|
|
if anyOf[0] != nil {
|
|
result = append(result, &nodePattern{nodeImpl: nodeImpl{desc: anyOf}})
|
|
}
|
|
} else {
|
|
result = append(result, &nodeAnyOf{nodeImpl: nodeImpl{desc: anyOf}})
|
|
}
|
|
|
|
if commonRightCount > 0 {
|
|
result = append(result, &nodePattern{nodeImpl: nodeImpl{desc: commonRight}})
|
|
}
|
|
|
|
return &nodePattern{nodeImpl: nodeImpl{desc: result}}
|
|
}
|
|
|
|
func uniqueNodes(nodes []node) (result []node) {
|
|
head:
|
|
for _, n := range nodes {
|
|
for _, e := range result {
|
|
if reflect.DeepEqual(e, n) {
|
|
continue head
|
|
}
|
|
}
|
|
|
|
result = append(result, n)
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func compileMatchers(matchers []match.Matcher) (match.Matcher, error) {
|
|
if len(matchers) == 0 {
|
|
return nil, fmt.Errorf("compile error: need at least one matcher")
|
|
}
|
|
|
|
if len(matchers) == 1 {
|
|
return matchers[0], nil
|
|
}
|
|
|
|
if m := glueMatchers(matchers); m != nil {
|
|
return m, nil
|
|
}
|
|
|
|
var (
|
|
val match.Matcher
|
|
idx int
|
|
)
|
|
maxLen := -1
|
|
for i, matcher := range matchers {
|
|
l := matcher.Len()
|
|
if l >= maxLen {
|
|
maxLen = l
|
|
idx = i
|
|
val = matcher
|
|
}
|
|
}
|
|
|
|
left := matchers[:idx]
|
|
var right []match.Matcher
|
|
if len(matchers) > idx+1 {
|
|
right = matchers[idx+1:]
|
|
}
|
|
|
|
var l, r match.Matcher
|
|
var err error
|
|
if len(left) > 0 {
|
|
l, err = compileMatchers(left)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if len(right) > 0 {
|
|
r, err = compileMatchers(right)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return match.NewBTree(val, l, r), nil
|
|
}
|
|
|
|
//func complexity(m match.Matcher) int {
|
|
// var matchers []match.Matcher
|
|
// var k int
|
|
//
|
|
// switch matcher := m.(type) {
|
|
//
|
|
// case match.Nothing:
|
|
// return 0
|
|
//
|
|
// case match.Max, match.Range, match.Suffix, match.Text:
|
|
// return 1
|
|
//
|
|
// case match.PrefixSuffix, match.Single, match.Row:
|
|
// return 2
|
|
//
|
|
// case match.Any, match.Contains, match.List, match.Min, match.Prefix, match.Super:
|
|
// return 4
|
|
//
|
|
// case match.BTree:
|
|
// matchers = append(matchers, matcher.Value)
|
|
// if matcher.Left != nil {
|
|
// matchers = append(matchers, matcher.Left)
|
|
// }
|
|
// if matcher.Right != nil {
|
|
// matchers = append(matchers, matcher.Right)
|
|
// }
|
|
// k = 1
|
|
//
|
|
// case match.AnyOf:
|
|
// matchers = matcher.Matchers
|
|
// k = 1
|
|
// case match.EveryOf:
|
|
// matchers = matcher.Matchers
|
|
// k = 1
|
|
//
|
|
// default:
|
|
// return 0
|
|
// }
|
|
//
|
|
// var sum int
|
|
// for _, m := range matchers {
|
|
// sum += complexity(m)
|
|
// }
|
|
//
|
|
// return sum * k
|
|
//}
|
|
|
|
func doAnyOf(n *nodeAnyOf, s []rune) (match.Matcher, error) {
|
|
var matchers []match.Matcher
|
|
for _, desc := range n.children() {
|
|
if desc == nil {
|
|
matchers = append(matchers, match.Nothing{})
|
|
continue
|
|
}
|
|
|
|
m, err := do(desc, s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
matchers = append(matchers, optimize(m))
|
|
}
|
|
|
|
return match.AnyOf{matchers}, nil
|
|
}
|
|
|
|
func do(leaf node, s []rune) (m match.Matcher, err error) {
|
|
switch n := leaf.(type) {
|
|
|
|
case *nodeAnyOf:
|
|
// todo this could be faster on pattern_alternatives_combine_lite
|
|
if n := minimizeAnyOf(n.children()); n != nil {
|
|
return do(n, s)
|
|
}
|
|
|
|
var matchers []match.Matcher
|
|
for _, desc := range n.children() {
|
|
if desc == nil {
|
|
matchers = append(matchers, match.Nothing{})
|
|
continue
|
|
}
|
|
|
|
m, err := do(desc, s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
matchers = append(matchers, optimize(m))
|
|
}
|
|
|
|
return match.AnyOf{matchers}, nil
|
|
|
|
case *nodePattern:
|
|
nodes := leaf.children()
|
|
if len(nodes) == 0 {
|
|
return match.Nothing{}, nil
|
|
}
|
|
|
|
var matchers []match.Matcher
|
|
for _, desc := range nodes {
|
|
m, err := do(desc, s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
matchers = append(matchers, optimize(m))
|
|
}
|
|
|
|
m, err = compileMatchers(minimizeMatchers(matchers))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
case *nodeList:
|
|
m = match.List{[]rune(n.chars), n.not}
|
|
|
|
case *nodeRange:
|
|
m = match.Range{n.lo, n.hi, n.not}
|
|
|
|
case *nodeAny:
|
|
m = match.Any{s}
|
|
|
|
case *nodeSuper:
|
|
m = match.Super{}
|
|
|
|
case *nodeSingle:
|
|
m = match.Single{s}
|
|
|
|
case *nodeText:
|
|
m = match.NewText(n.text)
|
|
|
|
default:
|
|
return nil, fmt.Errorf("could not compile tree: unknown node type")
|
|
}
|
|
|
|
return optimize(m), nil
|
|
}
|
|
|
|
func do2(node node, s []rune) ([]match.Matcher, error) {
|
|
var result []match.Matcher
|
|
|
|
switch n := node.(type) {
|
|
|
|
case *nodePattern:
|
|
ways := [][]match.Matcher{[]match.Matcher{}}
|
|
|
|
for _, desc := range node.children() {
|
|
variants, err := do2(desc, s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
fmt.Println("variants pat", variants)
|
|
|
|
for i, l := 0, len(ways); i < l; i++ {
|
|
for i := 0; i < len(variants); i++ {
|
|
o := optimize(variants[i])
|
|
if i == len(variants)-1 {
|
|
ways[i] = append(ways[i], o)
|
|
} else {
|
|
var w []match.Matcher
|
|
copy(w, ways[i])
|
|
ways = append(ways, append(w, o))
|
|
}
|
|
}
|
|
}
|
|
|
|
fmt.Println("ways pat", ways)
|
|
}
|
|
|
|
for _, matchers := range ways {
|
|
c, err := compileMatchers(minimizeMatchers(matchers))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
result = append(result, c)
|
|
}
|
|
|
|
case *nodeAnyOf:
|
|
ways := make([][]match.Matcher, len(node.children()))
|
|
for _, desc := range node.children() {
|
|
variants, err := do2(desc, s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
fmt.Println("variants any", variants)
|
|
|
|
for x, l := 0, len(ways); x < l; x++ {
|
|
for i := 0; i < len(variants); i++ {
|
|
o := optimize(variants[i])
|
|
if i == len(variants)-1 {
|
|
ways[x] = append(ways[x], o)
|
|
} else {
|
|
var w []match.Matcher
|
|
copy(w, ways[x])
|
|
ways = append(ways, append(w, o))
|
|
}
|
|
}
|
|
}
|
|
|
|
fmt.Println("ways any", ways)
|
|
}
|
|
|
|
for _, matchers := range ways {
|
|
c, err := compileMatchers(minimizeMatchers(matchers))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
result = append(result, c)
|
|
}
|
|
|
|
case *nodeList:
|
|
result = append(result, match.List{[]rune(n.chars), n.not})
|
|
|
|
case *nodeRange:
|
|
result = append(result, match.Range{n.lo, n.hi, n.not})
|
|
|
|
case *nodeAny:
|
|
result = append(result, match.Any{s})
|
|
|
|
case *nodeSuper:
|
|
result = append(result, match.Super{})
|
|
|
|
case *nodeSingle:
|
|
result = append(result, match.Single{s})
|
|
|
|
case *nodeText:
|
|
result = append(result, match.NewText(n.text))
|
|
|
|
default:
|
|
return nil, fmt.Errorf("could not compile tree: unknown node type")
|
|
}
|
|
|
|
for i, m := range result {
|
|
result[i] = optimize(m)
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
func compile(ast *nodePattern, s []rune) (Glob, error) {
|
|
// ms, err := do2(ast, s)
|
|
// if err != nil {
|
|
// return nil, err
|
|
// }
|
|
// if len(ms) == 1 {
|
|
// return ms[0], nil
|
|
// } else {
|
|
// return match.AnyOf{ms}, nil
|
|
// }
|
|
|
|
g, err := do(ast, s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return g, nil
|
|
}
|