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api.go
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api.go
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package hyperscan
import (
"fmt"
"io"
"github.com/flier/gohs/internal/hs"
)
// Match reports whether the byte slice b contains any match of the regular expression pattern.
func Match(pattern string, data []byte) (bool, error) {
p, err := ParsePattern(pattern)
if err != nil {
return false, fmt.Errorf("parse pattern, %w", err)
}
p.Flags |= SingleMatch
db, err := NewBlockDatabase(p)
if err != nil {
return false, fmt.Errorf("create block database, %w", err)
}
defer db.Close()
s, err := NewScratch(db)
if err != nil {
return false, fmt.Errorf("create scratch, %w", err)
}
defer func() {
_ = s.Free()
}()
h := &hs.MatchRecorder{}
if err = db.Scan(data, s, h.Handle, nil); err != nil {
return false, fmt.Errorf("match pattern, %w", err)
}
return h.Matched(), h.Err
}
// MatchReader reports whether the text returned by the Reader contains any match of the regular expression pattern.
func MatchReader(pattern string, reader io.Reader) (bool, error) {
p, err := ParsePattern(pattern)
if err != nil {
return false, fmt.Errorf("parse pattern, %w", err)
}
p.Flags |= SingleMatch
db, err := NewStreamDatabase(p)
if err != nil {
return false, fmt.Errorf("create stream database, %w", err)
}
defer db.Close()
s, err := NewScratch(db)
if err != nil {
return false, fmt.Errorf("create scratch, %w", err)
}
defer func() {
_ = s.Free()
}()
h := &hs.MatchRecorder{}
if err = db.Scan(reader, s, h.Handle, nil); err != nil {
return false, fmt.Errorf("match pattern, %w", err)
}
return h.Matched(), h.Err
}
// MatchString reports whether the string s contains any match of the regular expression pattern.
func MatchString(pattern, s string) (matched bool, err error) {
return Match(pattern, []byte(s))
}