// a less b
	}
	if bytes.Compare(a, b) <= 0 {
		// a less or equal b
	}
	if bytes.Compare(a, b) > 0 {
		// a greater b
	}
	if bytes.Compare(a, b) >= 0 {
		// a greater or equal b
	}

	// Prefer Equal to Compare for equality comparisons.
	if bytes.Equal(a, b) {
		// a equal b
	}
	if !bytes.Equal(a, b) {
		// a not equal b
	}
}

func ExampleCompare_search() {

		for i := 0; i < b.N; i++ {
			eq := Equal(buf1, buf2)
			if !eq {
				b.Fatal("bad equal")
			}
		}
	})

	sizes := []int{1, 6, 9, 15, 16, 20, 32, 4 << 10, 4 << 20, 64 << 20}

	b.Run("same", func(b *testing.B) {
		benchBytes(b, sizes, bmEqual(func(a, b []byte) bool { return Equal(a, a) }))
	})

	benchBytes(b, sizes, bmEqual(Equal))
}

	instructions["JCS"] = x86.AJCS  /* carry set (CF = 1) */
	instructions["JE"] = x86.AJEQ   /* alternate */
	instructions["JEQ"] = x86.AJEQ  /* equal (ZF = 1) */
	instructions["JG"] = x86.AJGT   /* alternate */
	instructions["JGE"] = x86.AJGE  /* greater than or equal (signed) (SF = OF) */
	instructions["JGT"] = x86.AJGT  /* greater than (signed) (ZF = 0 && SF = OF) */

// It is analogous to the facilities of the [strings] package.
package bytes

import (
	"internal/bytealg"
	"unicode"
	"unicode/utf8"
)

// Equal reports whether a and b
// are the same length and contain the same bytes.
// A nil argument is equivalent to an empty slice.
func Equal(a, b []byte) bool {
	// Neither cmd/compile nor gccgo allocates for these string conversions.
	return string(a) == string(b)
}

	}

	// Extract everything between the space and the final newline.
	rec, nl, rem := rest[:n-1], rest[n-1:n], rest[n:]
	if nl != "\n" {
		return "", "", s, ErrHeader
	}

	// The first equals separates the key from the value.
	k, v, ok = strings.Cut(rec, "=")
	if !ok {
		return "", "", s, ErrHeader
	}

	if !validPAXRecord(k, v) {
		return "", "", s, ErrHeader
	}
	return k, v, rem, nil

		}
	}
}

func TestModTime(t *testing.T) {
	var testTime = time.Date(2009, time.November, 10, 23, 45, 58, 0, time.UTC)
	fh := new(FileHeader)
	fh.SetModTime(testTime)
	outTime := fh.ModTime()
	if !outTime.Equal(testTime) {
		t.Errorf("times don't match: got %s, want %s", outTime, testTime)
	}
}

func testHeaderRoundTrip(fh *FileHeader, wantUncompressedSize uint32, wantUncompressedSize64 uint64, t *testing.T) {

// argument, not a pointer to it. The specification of the result depends on
// the type:
//
//	Slice: The size specifies the length. The capacity of the slice is
//	equal to its length. A second integer argument may be provided to
//	specify a different capacity; it must be no smaller than the
//	length. For example, make([]int, 0, 10) allocates an underlying array

			if allocs != 0 {
				t.Errorf("allocation occurred during write")
			}
			// Check that buffer has correct data.
			if !Equal(buf.Bytes()[0:startLen-readBytes], xBytes[readBytes:]) {
				t.Errorf("bad initial data at %d %d", startLen, growLen)
			}
			if !Equal(buf.Bytes()[startLen-readBytes:startLen-readBytes+growLen], yBytes) {
				t.Errorf("bad written data at %d %d", startLen, growLen)
			}
		}
	}
}

	l := NewReaderSize(buf, minReadBufferSize)
	line, isPrefix, err := l.ReadLine()
	if !isPrefix || !bytes.Equal(line, data[:minReadBufferSize]) || err != nil {
		t.Errorf("bad result for first line: got %q want %q %v", line, data[:minReadBufferSize], err)
	}
	data = data[len(line):]
	line, isPrefix, err = l.ReadLine()
	if !isPrefix || !bytes.Equal(line, data[:minReadBufferSize]) || err != nil {

		name                          string
		features, required, exception []string
		ok                            bool   // want
		out                           string // want
	}{
		{
			name:     "equal",
			features: []string{"A", "B", "C"},
			required: []string{"A", "B", "C"},
			ok:       true,
			out:      "",
		},
		{
			name:     "feature added",
			features: []string{"A", "B", "C", "D", "E", "F"},