aboutsummaryrefslogtreecommitdiff
path: root/vendor/github.com/modern-go/reflect2/unsafe_slice.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/github.com/modern-go/reflect2/unsafe_slice.go')
-rw-r--r--vendor/github.com/modern-go/reflect2/unsafe_slice.go177
1 files changed, 0 insertions, 177 deletions
diff --git a/vendor/github.com/modern-go/reflect2/unsafe_slice.go b/vendor/github.com/modern-go/reflect2/unsafe_slice.go
deleted file mode 100644
index 1c6d876c..00000000
--- a/vendor/github.com/modern-go/reflect2/unsafe_slice.go
+++ /dev/null
@@ -1,177 +0,0 @@
-package reflect2
-
-import (
- "reflect"
- "unsafe"
-)
-
-// sliceHeader is a safe version of SliceHeader used within this package.
-type sliceHeader struct {
- Data unsafe.Pointer
- Len int
- Cap int
-}
-
-type UnsafeSliceType struct {
- unsafeType
- elemRType unsafe.Pointer
- pElemRType unsafe.Pointer
- elemSize uintptr
-}
-
-func newUnsafeSliceType(cfg *frozenConfig, type1 reflect.Type) SliceType {
- elemType := type1.Elem()
- return &UnsafeSliceType{
- unsafeType: *newUnsafeType(cfg, type1),
- pElemRType: unpackEFace(reflect.PtrTo(elemType)).data,
- elemRType: unpackEFace(elemType).data,
- elemSize: elemType.Size(),
- }
-}
-
-func (type2 *UnsafeSliceType) Set(obj interface{}, val interface{}) {
- objEFace := unpackEFace(obj)
- assertType("Type.Set argument 1", type2.ptrRType, objEFace.rtype)
- valEFace := unpackEFace(val)
- assertType("Type.Set argument 2", type2.ptrRType, valEFace.rtype)
- type2.UnsafeSet(objEFace.data, valEFace.data)
-}
-
-func (type2 *UnsafeSliceType) UnsafeSet(ptr unsafe.Pointer, val unsafe.Pointer) {
- *(*sliceHeader)(ptr) = *(*sliceHeader)(val)
-}
-
-func (type2 *UnsafeSliceType) IsNil(obj interface{}) bool {
- if obj == nil {
- return true
- }
- objEFace := unpackEFace(obj)
- assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
- return type2.UnsafeIsNil(objEFace.data)
-}
-
-func (type2 *UnsafeSliceType) UnsafeIsNil(ptr unsafe.Pointer) bool {
- if ptr == nil {
- return true
- }
- return (*sliceHeader)(ptr).Data == nil
-}
-
-func (type2 *UnsafeSliceType) SetNil(obj interface{}) {
- objEFace := unpackEFace(obj)
- assertType("SliceType.SetNil argument 1", type2.ptrRType, objEFace.rtype)
- type2.UnsafeSetNil(objEFace.data)
-}
-
-func (type2 *UnsafeSliceType) UnsafeSetNil(ptr unsafe.Pointer) {
- header := (*sliceHeader)(ptr)
- header.Len = 0
- header.Cap = 0
- header.Data = nil
-}
-
-func (type2 *UnsafeSliceType) MakeSlice(length int, cap int) interface{} {
- return packEFace(type2.ptrRType, type2.UnsafeMakeSlice(length, cap))
-}
-
-func (type2 *UnsafeSliceType) UnsafeMakeSlice(length int, cap int) unsafe.Pointer {
- header := &sliceHeader{unsafe_NewArray(type2.elemRType, cap), length, cap}
- return unsafe.Pointer(header)
-}
-
-func (type2 *UnsafeSliceType) LengthOf(obj interface{}) int {
- objEFace := unpackEFace(obj)
- assertType("SliceType.Len argument 1", type2.ptrRType, objEFace.rtype)
- return type2.UnsafeLengthOf(objEFace.data)
-}
-
-func (type2 *UnsafeSliceType) UnsafeLengthOf(obj unsafe.Pointer) int {
- header := (*sliceHeader)(obj)
- return header.Len
-}
-
-func (type2 *UnsafeSliceType) SetIndex(obj interface{}, index int, elem interface{}) {
- objEFace := unpackEFace(obj)
- assertType("SliceType.SetIndex argument 1", type2.ptrRType, objEFace.rtype)
- elemEFace := unpackEFace(elem)
- assertType("SliceType.SetIndex argument 3", type2.pElemRType, elemEFace.rtype)
- type2.UnsafeSetIndex(objEFace.data, index, elemEFace.data)
-}
-
-func (type2 *UnsafeSliceType) UnsafeSetIndex(obj unsafe.Pointer, index int, elem unsafe.Pointer) {
- header := (*sliceHeader)(obj)
- elemPtr := arrayAt(header.Data, index, type2.elemSize, "i < s.Len")
- typedmemmove(type2.elemRType, elemPtr, elem)
-}
-
-func (type2 *UnsafeSliceType) GetIndex(obj interface{}, index int) interface{} {
- objEFace := unpackEFace(obj)
- assertType("SliceType.GetIndex argument 1", type2.ptrRType, objEFace.rtype)
- elemPtr := type2.UnsafeGetIndex(objEFace.data, index)
- return packEFace(type2.pElemRType, elemPtr)
-}
-
-func (type2 *UnsafeSliceType) UnsafeGetIndex(obj unsafe.Pointer, index int) unsafe.Pointer {
- header := (*sliceHeader)(obj)
- return arrayAt(header.Data, index, type2.elemSize, "i < s.Len")
-}
-
-func (type2 *UnsafeSliceType) Append(obj interface{}, elem interface{}) {
- objEFace := unpackEFace(obj)
- assertType("SliceType.Append argument 1", type2.ptrRType, objEFace.rtype)
- elemEFace := unpackEFace(elem)
- assertType("SliceType.Append argument 2", type2.pElemRType, elemEFace.rtype)
- type2.UnsafeAppend(objEFace.data, elemEFace.data)
-}
-
-func (type2 *UnsafeSliceType) UnsafeAppend(obj unsafe.Pointer, elem unsafe.Pointer) {
- header := (*sliceHeader)(obj)
- oldLen := header.Len
- type2.UnsafeGrow(obj, oldLen+1)
- type2.UnsafeSetIndex(obj, oldLen, elem)
-}
-
-func (type2 *UnsafeSliceType) Cap(obj interface{}) int {
- objEFace := unpackEFace(obj)
- assertType("SliceType.Cap argument 1", type2.ptrRType, objEFace.rtype)
- return type2.UnsafeCap(objEFace.data)
-}
-
-func (type2 *UnsafeSliceType) UnsafeCap(ptr unsafe.Pointer) int {
- return (*sliceHeader)(ptr).Cap
-}
-
-func (type2 *UnsafeSliceType) Grow(obj interface{}, newLength int) {
- objEFace := unpackEFace(obj)
- assertType("SliceType.Grow argument 1", type2.ptrRType, objEFace.rtype)
- type2.UnsafeGrow(objEFace.data, newLength)
-}
-
-func (type2 *UnsafeSliceType) UnsafeGrow(obj unsafe.Pointer, newLength int) {
- header := (*sliceHeader)(obj)
- if newLength <= header.Cap {
- header.Len = newLength
- return
- }
- newCap := calcNewCap(header.Cap, newLength)
- newHeader := (*sliceHeader)(type2.UnsafeMakeSlice(header.Len, newCap))
- typedslicecopy(type2.elemRType, *newHeader, *header)
- header.Data = newHeader.Data
- header.Cap = newHeader.Cap
- header.Len = newLength
-}
-
-func calcNewCap(cap int, expectedCap int) int {
- if cap == 0 {
- cap = expectedCap
- } else {
- for cap < expectedCap {
- if cap < 1024 {
- cap += cap
- } else {
- cap += cap / 4
- }
- }
- }
- return cap
-}