diff options
Diffstat (limited to 'vendor/github.com/cloudwego/base64x/faststr.go')
-rw-r--r-- | vendor/github.com/cloudwego/base64x/faststr.go | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/vendor/github.com/cloudwego/base64x/faststr.go b/vendor/github.com/cloudwego/base64x/faststr.go new file mode 100644 index 000000000..083d864f7 --- /dev/null +++ b/vendor/github.com/cloudwego/base64x/faststr.go @@ -0,0 +1,51 @@ +/* + * Copyright 2024 CloudWeGo Authors + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package base64x + +import ( + `reflect` + `unsafe` +) + +func mem2str(v []byte) (s string) { + (*reflect.StringHeader)(unsafe.Pointer(&s)).Len = (*reflect.SliceHeader)(unsafe.Pointer(&v)).Len + (*reflect.StringHeader)(unsafe.Pointer(&s)).Data = (*reflect.SliceHeader)(unsafe.Pointer(&v)).Data + return +} + +func str2mem(s string) (v []byte) { + (*reflect.SliceHeader)(unsafe.Pointer(&v)).Cap = (*reflect.StringHeader)(unsafe.Pointer(&s)).Len + (*reflect.SliceHeader)(unsafe.Pointer(&v)).Len = (*reflect.StringHeader)(unsafe.Pointer(&s)).Len + (*reflect.SliceHeader)(unsafe.Pointer(&v)).Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data + return +} + +func mem2addr(v []byte) unsafe.Pointer { + return *(*unsafe.Pointer)(unsafe.Pointer(&v)) +} + +// NoEscape hides a pointer from escape analysis. NoEscape is +// the identity function but escape analysis doesn't think the +// output depends on the input. NoEscape is inlined and currently +// compiles down to zero instructions. +// USE CAREFULLY! +//go:nosplit +//goland:noinspection GoVetUnsafePointer +func noEscape(p unsafe.Pointer) unsafe.Pointer { + x := uintptr(p) + return unsafe.Pointer(x ^ 0) +} |