mirror of
https://github.com/kubernetes-sigs/prometheus-adapter.git
synced 2026-04-06 09:47:54 +00:00
a293b2bf94
Travis seems to be having issues pulling deps, so we'll have to check in the vendor directory and prevent the makefile from trying to regenerate it normally.
128 lines
4.4 KiB
Go
128 lines
4.4 KiB
Go
// Protocol Buffers for Go with Gadgets
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//
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// Copyright (c) 2013, The GoGo Authors. All rights reserved.
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// http://github.com/gogo/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// +build !appengine,!js
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// This file contains the implementation of the proto field accesses using package unsafe.
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package proto
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import (
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"reflect"
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"unsafe"
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)
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func structPointer_InterfaceAt(p structPointer, f field, t reflect.Type) interface{} {
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point := unsafe.Pointer(uintptr(p) + uintptr(f))
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r := reflect.NewAt(t, point)
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return r.Interface()
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}
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func structPointer_InterfaceRef(p structPointer, f field, t reflect.Type) interface{} {
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point := unsafe.Pointer(uintptr(p) + uintptr(f))
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r := reflect.NewAt(t, point)
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if r.Elem().IsNil() {
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return nil
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}
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return r.Elem().Interface()
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}
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func copyUintPtr(oldptr, newptr uintptr, size int) {
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oldbytes := make([]byte, 0)
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oldslice := (*reflect.SliceHeader)(unsafe.Pointer(&oldbytes))
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oldslice.Data = oldptr
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oldslice.Len = size
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oldslice.Cap = size
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newbytes := make([]byte, 0)
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newslice := (*reflect.SliceHeader)(unsafe.Pointer(&newbytes))
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newslice.Data = newptr
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newslice.Len = size
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newslice.Cap = size
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copy(newbytes, oldbytes)
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}
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func structPointer_Copy(oldptr structPointer, newptr structPointer, size int) {
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copyUintPtr(uintptr(oldptr), uintptr(newptr), size)
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}
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func appendStructPointer(base structPointer, f field, typ reflect.Type) structPointer {
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size := typ.Elem().Size()
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oldHeader := structPointer_GetSliceHeader(base, f)
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oldSlice := reflect.NewAt(typ, unsafe.Pointer(oldHeader)).Elem()
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newLen := oldHeader.Len + 1
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newSlice := reflect.MakeSlice(typ, newLen, newLen)
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reflect.Copy(newSlice, oldSlice)
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bas := toStructPointer(newSlice)
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oldHeader.Data = uintptr(bas)
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oldHeader.Len = newLen
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oldHeader.Cap = newLen
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return structPointer(unsafe.Pointer(uintptr(unsafe.Pointer(bas)) + uintptr(uintptr(newLen-1)*size)))
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}
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func structPointer_FieldPointer(p structPointer, f field) structPointer {
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return structPointer(unsafe.Pointer(uintptr(p) + uintptr(f)))
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}
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func structPointer_GetRefStructPointer(p structPointer, f field) structPointer {
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return structPointer((*structPointer)(unsafe.Pointer(uintptr(p) + uintptr(f))))
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}
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func structPointer_GetSliceHeader(p structPointer, f field) *reflect.SliceHeader {
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return (*reflect.SliceHeader)(unsafe.Pointer(uintptr(p) + uintptr(f)))
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}
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func structPointer_Add(p structPointer, size field) structPointer {
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return structPointer(unsafe.Pointer(uintptr(p) + uintptr(size)))
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}
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func structPointer_Len(p structPointer, f field) int {
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return len(*(*[]interface{})(unsafe.Pointer(structPointer_GetRefStructPointer(p, f))))
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}
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func structPointer_StructRefSlice(p structPointer, f field, size uintptr) *structRefSlice {
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return &structRefSlice{p: p, f: f, size: size}
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}
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// A structRefSlice represents a slice of structs (themselves submessages or groups).
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type structRefSlice struct {
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p structPointer
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f field
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size uintptr
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}
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func (v *structRefSlice) Len() int {
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return structPointer_Len(v.p, v.f)
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}
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func (v *structRefSlice) Index(i int) structPointer {
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ss := structPointer_GetStructPointer(v.p, v.f)
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ss1 := structPointer_GetRefStructPointer(ss, 0)
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return structPointer_Add(ss1, field(uintptr(i)*v.size))
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}
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