}

// GobDecode implements the [encoding/gob.GobDecoder] interface.
func (z *Rat) GobDecode(buf []byte) error {
	if len(buf) == 0 {
		// Other side sent a nil or default value.
		*z = Rat{}
		return nil
	}
	if len(buf) < 5 {
		return errors.New("Rat.GobDecode: buffer too small")
	}
	b := buf[0]
	if b>>1 != ratGobVersion {
		return fmt.Errorf("Rat.GobDecode: encoding version %d not supported", b>>1)
	}
	const j = 1 + 4

	un0 := un10 & mask32
	q1 := un32 / yn1
	rhat := un32 - q1*yn1

	for q1 >= two32 || q1*yn0 > two32*rhat+un1 {
		q1--
		rhat += yn1
		if rhat >= two32 {
			break
		}
	}

	un21 := un32*two32 + un1 - q1*y
	q0 := un21 / yn1
	rhat = un21 - q0*yn1

	for q0 >= two32 || q0*yn0 > two32*rhat+un0 {
		q0--
		rhat += yn1
		if rhat >= two32 {
			break
		}
	}

	un0 := un10 & (1<<32 - 1)
	q1 := un32 / vn1
	rhat := un32 - q1*vn1

again1:
	if q1 >= b || q1*vn0 > b*rhat+un1 {
		q1--
		rhat += vn1
		if rhat < b {
			goto again1
		}
	}

	un21 := un32*b + un1 - q1*v
	q0 := un21 / vn1
	rhat = un21 - q0*vn1

again2:
	if q0 >= b || q0*vn0 > b*rhat+un0 {
		q0--
		rhat += vn1
		if rhat < b {
			goto again2
		}
	}

See textregex.c for copyright + license.

testregex.c	http://www2.research.att.com/~gsf/testregex/testregex.c
basic.dat	http://www2.research.att.com/~gsf/testregex/basic.dat
nullsubexpr.dat	http://www2.research.att.com/~gsf/testregex/nullsubexpr.dat
repetition.dat	http://www2.research.att.com/~gsf/testregex/repetition.dat

The test data has been edited to reflect RE2/Go differences:
  * In a star of a possibly empty match like (a*)* matching x,

			}
		}
	}
}

func TestRatSetStringZero(t *testing.T) {
	got, _ := new(Rat).SetString("0")
	want := new(Rat).SetInt64(0)
	if !reflect.DeepEqual(got, want) {
		t.Errorf("got %#+v, want %#+v", got, want)
	}
}

func TestRatScan(t *testing.T) {
	var buf bytes.Buffer
	for i, test := range setStringTests {
		x := new(Rat)
		buf.Reset()
		buf.WriteString(test.in)

		_, err := fmt.Fscanf(&buf, "%v", x)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package bug071

type rat struct  {
	den  int;
}

func (u *rat) pr() {
}

type dch struct {
	dat chan  *rat;
}

func dosplit(in *dch){
	dat := <-in.dat;
	_ = dat;

		if len(dat) < 8 {
			return nil, &FormatError{offset, "command block too small", nil}
		}
		cmd, siz := LoadCmd(bo.Uint32(dat[0:4])), bo.Uint32(dat[4:8])
		if siz < 8 || siz > uint32(len(dat)) {
			return nil, &FormatError{offset, "invalid command block size", nil}
		}
		var cmddat []byte
		cmddat, dat = dat[0:siz], dat[siz:]
		offset += int64(siz)
		var s *Segment

// license that can be found in the LICENSE file.

// This file implements rat-to-string conversion functions.

package big

import (
	"errors"
	"fmt"
	"io"
	"strconv"
	"strings"
)

func ratTok(ch rune) bool {
	return strings.ContainsRune("+-/0123456789.eE", ch)
}

var ratZero Rat
var _ fmt.Scanner = &ratZero // *Rat must implement fmt.Scanner

	// The following is an invalid 1x2 grayscale PNG image. The header is OK,
	// but the zlib-compressed IDAT payload contains two bytes "\x02\x00",
	// which is only one row of data (the leading "\x02" is a row filter).
	const (
		ihdr = "\x00\x00\x00\x0dIHDR\x00\x00\x00\x01\x00\x00\x00\x02\x08\x00\x00\x00\x00\xbc\xea\xe9\xfb"
		idat = "\x00\x00\x00\x0eIDAT\x78\x9c\x62\x62\x00\x04\x00\x00\xff\xff\x00\x06\x00\x03\xfa\xd0\x59\xae"

	if err != nil {
		return nil, err
	}

	for _, mem := range arch.Members {
		f, err := arch.GetFile(mem.Name)
		if err != nil {
			return nil, err
		}
		sdat := f.CSect(".go_export")
		if sdat != nil {
			return bytes.NewReader(sdat), nil
		}
	}

	return nil, fmt.Errorf(".go_export not found in this archive")
}

// readerAtFromSeeker turns an io.ReadSeeker into an io.ReaderAt.