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Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/golang.org/x/sys@v0.1.0/cpu/byteorder.go | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/cpu/byteorder.go b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/cpu/byteorder.go new file mode 100644 index 0000000..271055b --- /dev/null +++ b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/cpu/byteorder.go @@ -0,0 +1,66 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package cpu + +import ( + "runtime" +) + +// byteOrder is a subset of encoding/binary.ByteOrder. +type byteOrder interface { + Uint32([]byte) uint32 + Uint64([]byte) uint64 +} + +type littleEndian struct{} +type bigEndian struct{} + +func (littleEndian) Uint32(b []byte) uint32 { + _ = b[3] // bounds check hint to compiler; see golang.org/issue/14808 + return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 +} + +func (littleEndian) Uint64(b []byte) uint64 { + _ = b[7] // bounds check hint to compiler; see golang.org/issue/14808 + return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | + uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 +} + +func (bigEndian) Uint32(b []byte) uint32 { + _ = b[3] // bounds check hint to compiler; see golang.org/issue/14808 + return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24 +} + +func (bigEndian) Uint64(b []byte) uint64 { + _ = b[7] // bounds check hint to compiler; see golang.org/issue/14808 + return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 | + uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56 +} + +// hostByteOrder returns littleEndian on little-endian machines and +// bigEndian on big-endian machines. +func hostByteOrder() byteOrder { + switch runtime.GOARCH { + case "386", "amd64", "amd64p32", + "alpha", + "arm", "arm64", + "loong64", + "mipsle", "mips64le", "mips64p32le", + "nios2", + "ppc64le", + "riscv", "riscv64", + "sh": + return littleEndian{} + case "armbe", "arm64be", + "m68k", + "mips", "mips64", "mips64p32", + "ppc", "ppc64", + "s390", "s390x", + "shbe", + "sparc", "sparc64": + return bigEndian{} + } + panic("unknown architecture") +} |