From a031b83a09a8628435317a03f199cdc18b78262f Mon Sep 17 00:00:00 2001 From: Matthew Heon Date: Wed, 1 Nov 2017 11:24:59 -0400 Subject: Initial checkin from CRI-O repo Signed-off-by: Matthew Heon --- vendor/github.com/ugorji/go/codec/helper_unsafe.go | 49 ++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 vendor/github.com/ugorji/go/codec/helper_unsafe.go (limited to 'vendor/github.com/ugorji/go/codec/helper_unsafe.go') diff --git a/vendor/github.com/ugorji/go/codec/helper_unsafe.go b/vendor/github.com/ugorji/go/codec/helper_unsafe.go new file mode 100644 index 000000000..0f596c71a --- /dev/null +++ b/vendor/github.com/ugorji/go/codec/helper_unsafe.go @@ -0,0 +1,49 @@ +// +build unsafe + +// Copyright (c) 2012-2015 Ugorji Nwoke. All rights reserved. +// Use of this source code is governed by a MIT license found in the LICENSE file. + +package codec + +import ( + "unsafe" +) + +// This file has unsafe variants of some helper methods. + +type unsafeString struct { + Data uintptr + Len int +} + +type unsafeSlice struct { + Data uintptr + Len int + Cap int +} + +// stringView returns a view of the []byte as a string. +// In unsafe mode, it doesn't incur allocation and copying caused by conversion. +// In regular safe mode, it is an allocation and copy. +func stringView(v []byte) string { + if len(v) == 0 { + return "" + } + + bx := (*unsafeSlice)(unsafe.Pointer(&v)) + sx := unsafeString{bx.Data, bx.Len} + return *(*string)(unsafe.Pointer(&sx)) +} + +// bytesView returns a view of the string as a []byte. +// In unsafe mode, it doesn't incur allocation and copying caused by conversion. +// In regular safe mode, it is an allocation and copy. +func bytesView(v string) []byte { + if len(v) == 0 { + return zeroByteSlice + } + + sx := (*unsafeString)(unsafe.Pointer(&v)) + bx := unsafeSlice{sx.Data, sx.Len, sx.Len} + return *(*[]byte)(unsafe.Pointer(&bx)) +} -- cgit v1.2.3-54-g00ecf