Source file src/pkg/internal/bytealg/compare_generic.go

     1	// Copyright 2018 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build !386,!amd64,!amd64p32,!s390x,!arm,!arm64,!ppc64,!ppc64le,!mips,!mipsle,!wasm
     6	
     7	package bytealg
     8	
     9	import _ "unsafe" // for go:linkname
    10	
    11	func Compare(a, b []byte) int {
    12		l := len(a)
    13		if len(b) < l {
    14			l = len(b)
    15		}
    16		if l == 0 || &a[0] == &b[0] {
    17			goto samebytes
    18		}
    19		for i := 0; i < l; i++ {
    20			c1, c2 := a[i], b[i]
    21			if c1 < c2 {
    22				return -1
    23			}
    24			if c1 > c2 {
    25				return +1
    26			}
    27		}
    28	samebytes:
    29		if len(a) < len(b) {
    30			return -1
    31		}
    32		if len(a) > len(b) {
    33			return +1
    34		}
    35		return 0
    36	}
    37	
    38	//go:linkname runtime_cmpstring runtime.cmpstring
    39	func runtime_cmpstring(a, b string) int {
    40		l := len(a)
    41		if len(b) < l {
    42			l = len(b)
    43		}
    44		for i := 0; i < l; i++ {
    45			c1, c2 := a[i], b[i]
    46			if c1 < c2 {
    47				return -1
    48			}
    49			if c1 > c2 {
    50				return +1
    51			}
    52		}
    53		if len(a) < len(b) {
    54			return -1
    55		}
    56		if len(a) > len(b) {
    57			return +1
    58		}
    59		return 0
    60	}
    61	

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