56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
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package debug
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import (
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"bytes"
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"fmt"
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"github.com/gobwas/glob/match"
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"math/rand"
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)
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func Graphviz(pattern string, m match.Matcher) string {
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return fmt.Sprintf(`digraph G {graph[label="%s"];%s}`, pattern, graphviz_internal(m, fmt.Sprintf("%x", rand.Int63())))
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}
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func graphviz_internal(m match.Matcher, id string) string {
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buf := &bytes.Buffer{}
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switch matcher := m.(type) {
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case match.BTree:
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fmt.Fprintf(buf, `"%s"[label="%s"];`, id, matcher.Value.String())
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for _, m := range []match.Matcher{matcher.Left, matcher.Right} {
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switch n := m.(type) {
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case nil:
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rnd := rand.Int63()
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fmt.Fprintf(buf, `"%x"[label="<nil>"];`, rnd)
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fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
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default:
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sub := fmt.Sprintf("%x", rand.Int63())
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fmt.Fprintf(buf, `"%s"->"%s";`, id, sub)
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fmt.Fprintf(buf, graphviz_internal(n, sub))
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}
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}
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case match.AnyOf:
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fmt.Fprintf(buf, `"%s"[label="AnyOf"];`, id)
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for _, m := range matcher.Matchers {
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rnd := rand.Int63()
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fmt.Fprintf(buf, graphviz_internal(m, fmt.Sprintf("%x", rnd)))
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fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
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}
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case match.EveryOf:
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fmt.Fprintf(buf, `"%s"[label="EveryOf"];`, id)
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for _, m := range matcher.Matchers {
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rnd := rand.Int63()
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fmt.Fprintf(buf, graphviz_internal(m, fmt.Sprintf("%x", rnd)))
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fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
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}
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default:
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fmt.Fprintf(buf, `"%s"[label="%s"];`, id, m.String())
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}
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return buf.String()
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}
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