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This commit is contained in:
gobwas 2016-02-22 23:12:29 +03:00
parent 291b8084ed
commit 6cb2c11fd7
1 changed files with 10 additions and 56 deletions
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66
cmd/globdraw/main.go
View File

@ -1,64 +1,16 @@
package main package main
import ( import (
"bytes"
"flag" "flag"
"fmt" "fmt"
"github.com/gobwas/glob" "github.com/gobwas/glob"
"github.com/gobwas/glob/match" "github.com/gobwas/glob/match"
"math/rand" "github.com/gobwas/glob/match/debug"
"os" "os"
"strings" "strings"
"unicode/utf8" "unicode/utf8"
) )
func draw(pattern string, m match.Matcher) string {
return fmt.Sprintf(`digraph G {graph[label="%s"];%s}`, pattern, graphviz(m, fmt.Sprintf("%x", rand.Int63())))
}
func graphviz(m match.Matcher, id string) string {
buf := &bytes.Buffer{}
switch matcher := m.(type) {
case match.BTree:
fmt.Fprintf(buf, `"%s"[label="%s"];`, id, matcher.Value.String())
for _, m := range []match.Matcher{matcher.Left, matcher.Right} {
switch n := m.(type) {
case nil:
rnd := rand.Int63()
fmt.Fprintf(buf, `"%x"[label="<nil>"];`, rnd)
fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
default:
sub := fmt.Sprintf("%x", rand.Int63())
fmt.Fprintf(buf, `"%s"->"%s";`, id, sub)
fmt.Fprintf(buf, graphviz(n, sub))
}
}
case match.AnyOf:
fmt.Fprintf(buf, `"%s"[label="AnyOf"];`, id)
for _, m := range matcher.Matchers {
rnd := rand.Int63()
fmt.Fprintf(buf, graphviz(m, fmt.Sprintf("%x", rnd)))
fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
}
case match.EveryOf:
fmt.Fprintf(buf, `"%s"[label="EveryOf"];`, id)
for _, m := range matcher.Matchers {
rnd := rand.Int63()
fmt.Fprintf(buf, graphviz(m, fmt.Sprintf("%x", rnd)))
fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
}
default:
fmt.Fprintf(buf, `"%s"[label="%s"];`, id, m.String())
}
return buf.String()
}
func main() { func main() {
pattern := flag.String("p", "", "pattern to draw") pattern := flag.String("p", "", "pattern to draw")
sep := flag.String("s", "", "comma separated list of separators characters") sep := flag.String("s", "", "comma separated list of separators characters")
@ -70,12 +22,14 @@ func main() {
} }
var separators []rune var separators []rune
for _, c := range strings.Split(*sep, ",") { if len(*sep) > 0 {
if r, w := utf8.DecodeRuneInString(c); len(c) > w { for _, c := range strings.Split(*sep, ",") {
fmt.Println("only single charactered separators are allowed") if r, w := utf8.DecodeRuneInString(c); len(c) > w {
os.Exit(1) fmt.Println("only single charactered separators are allowed")
} else { os.Exit(1)
separators = append(separators, r) } else {
separators = append(separators, r)
}
} }
} }
@ -86,5 +40,5 @@ func main() {
} }
matcher := glob.(match.Matcher) matcher := glob.(match.Matcher)
fmt.Fprint(os.Stdout, draw(*pattern, matcher)) fmt.Fprint(os.Stdout, debug.Graphviz(*pattern, matcher))
} }