Using new vendor

1. rancher/types

vendor/github.com/ugorji/go/codec/helper_unsafe.go

@@ -2,7 +2,7 @@
 // +build !appengine
 // +build go1.7
 
-// Copyright (c) 2012-2018 Ugorji Nwoke. All rights reserved.
+// 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
@@ -10,7 +10,6 @@ package codec
 import (
 	"reflect"
 	"sync/atomic"
-	"time"
 	"unsafe"
 )
 
@@ -19,7 +18,6 @@ import (
 
 // var zeroRTv [4]uintptr
 
-const safeMode = false
 const unsafeFlagIndir = 1 << 7 // keep in sync with GO_ROOT/src/reflect/value.go
 
 type unsafeString struct {
@@ -48,49 +46,50 @@ func stringView(v []byte) string {
 	if len(v) == 0 {
 		return ""
 	}
+
 	bx := (*unsafeSlice)(unsafe.Pointer(&v))
-	return *(*string)(unsafe.Pointer(&unsafeString{bx.Data, bx.Len}))
+	sx := unsafeString{bx.Data, bx.Len}
+	return *(*string)(unsafe.Pointer(&sx))
 }
 
 func bytesView(v string) []byte {
 	if len(v) == 0 {
 		return zeroByteSlice
 	}
+
 	sx := (*unsafeString)(unsafe.Pointer(&v))
-	return *(*[]byte)(unsafe.Pointer(&unsafeSlice{sx.Data, sx.Len, sx.Len}))
+	bx := unsafeSlice{sx.Data, sx.Len, sx.Len}
+	return *(*[]byte)(unsafe.Pointer(&bx))
 }
 
 func definitelyNil(v interface{}) bool {
-	// There is no global way of checking if an interface is nil.
-	// For true references (map, ptr, func, chan), you can just look
-	// at the word of the interface. However, for slices, you have to dereference
-	// the word, and get a pointer to the 3-word interface value.
-	//
-	// However, the following are cheap calls
-	// - TypeOf(interface): cheap 2-line call.
-	// - ValueOf(interface{}): expensive
-	// - type.Kind: cheap call through an interface
-	// - Value.Type(): cheap call
-	//                 except it's a method value (e.g. r.Read, which implies that it is a Func)
-
-	return ((*unsafeIntf)(unsafe.Pointer(&v))).word == nil
+	return (*unsafeIntf)(unsafe.Pointer(&v)).word == nil
 }
 
-func rv2i(rv reflect.Value) interface{} {
-	// TODO: consider a more generally-known optimization for reflect.Value ==> Interface
-	//
-	// Currently, we use this fragile method that taps into implememtation details from
-	// the source go stdlib reflect/value.go, and trims the implementation.
+// func keepAlive4BytesView(v string) {
+// 	runtime.KeepAlive(v)
+// }
 
-	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	// true references (map, func, chan, ptr - NOT slice) may be double-referenced as flagIndir
-	var ptr unsafe.Pointer
-	if refBitset.isset(byte(urv.flag&(1<<5-1))) && urv.flag&unsafeFlagIndir != 0 {
-		ptr = *(*unsafe.Pointer)(urv.ptr)
-	} else {
-		ptr = urv.ptr
+// func keepAlive4StringView(v []byte) {
+// 	runtime.KeepAlive(v)
+// }
+
+// TODO: consider a more generally-known optimization for reflect.Value ==> Interface
+//
+// Currently, we use this fragile method that taps into implememtation details from
+// the source go stdlib reflect/value.go,
+// and trims the implementation.
+func rv2i(rv reflect.Value) interface{} {
+	if false {
+		return rv.Interface()
 	}
-	return *(*interface{})(unsafe.Pointer(&unsafeIntf{typ: urv.typ, word: ptr}))
+	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
+	// references that are single-words (map, ptr) may be double-referenced as flagIndir
+	kk := urv.flag & (1<<5 - 1)
+	if (kk == uintptr(reflect.Map) || kk == uintptr(reflect.Ptr)) && urv.flag&unsafeFlagIndir != 0 {
+		return *(*interface{})(unsafe.Pointer(&unsafeIntf{word: *(*unsafe.Pointer)(urv.ptr), typ: urv.typ}))
+	}
+	return *(*interface{})(unsafe.Pointer(&unsafeIntf{word: urv.ptr, typ: urv.typ}))
 }
 
 func rt2id(rt reflect.Type) uintptr {
@@ -101,83 +100,16 @@ func rv2rtid(rv reflect.Value) uintptr {
 	return uintptr((*unsafeReflectValue)(unsafe.Pointer(&rv)).typ)
 }
 
-func i2rtid(i interface{}) uintptr {
-	return uintptr(((*unsafeIntf)(unsafe.Pointer(&i))).typ)
-}
+// func rv0t(rt reflect.Type) reflect.Value {
+// 	ut := (*unsafeIntf)(unsafe.Pointer(&rt))
+// 	// we need to determine whether ifaceIndir, and then whether to just pass 0 as the ptr
+// 	uv := unsafeReflectValue{ut.word, &zeroRTv, flag(rt.Kind())}
+// 	return *(*reflect.Value)(unsafe.Pointer(&uv})
+// }
 
 // --------------------------
-
-func isEmptyValue(v reflect.Value, tinfos *TypeInfos, deref, checkStruct bool) bool {
-	urv := (*unsafeReflectValue)(unsafe.Pointer(&v))
-	if urv.flag == 0 {
-		return true
-	}
-	switch v.Kind() {
-	case reflect.Invalid:
-		return true
-	case reflect.String:
-		return (*unsafeString)(urv.ptr).Len == 0
-	case reflect.Slice:
-		return (*unsafeSlice)(urv.ptr).Len == 0
-	case reflect.Bool:
-		return !*(*bool)(urv.ptr)
-	case reflect.Int:
-		return *(*int)(urv.ptr) == 0
-	case reflect.Int8:
-		return *(*int8)(urv.ptr) == 0
-	case reflect.Int16:
-		return *(*int16)(urv.ptr) == 0
-	case reflect.Int32:
-		return *(*int32)(urv.ptr) == 0
-	case reflect.Int64:
-		return *(*int64)(urv.ptr) == 0
-	case reflect.Uint:
-		return *(*uint)(urv.ptr) == 0
-	case reflect.Uint8:
-		return *(*uint8)(urv.ptr) == 0
-	case reflect.Uint16:
-		return *(*uint16)(urv.ptr) == 0
-	case reflect.Uint32:
-		return *(*uint32)(urv.ptr) == 0
-	case reflect.Uint64:
-		return *(*uint64)(urv.ptr) == 0
-	case reflect.Uintptr:
-		return *(*uintptr)(urv.ptr) == 0
-	case reflect.Float32:
-		return *(*float32)(urv.ptr) == 0
-	case reflect.Float64:
-		return *(*float64)(urv.ptr) == 0
-	case reflect.Interface:
-		isnil := urv.ptr == nil || *(*unsafe.Pointer)(urv.ptr) == nil
-		if deref {
-			if isnil {
-				return true
-			}
-			return isEmptyValue(v.Elem(), tinfos, deref, checkStruct)
-		}
-		return isnil
-	case reflect.Ptr:
-		isnil := urv.ptr == nil
-		if deref {
-			if isnil {
-				return true
-			}
-			return isEmptyValue(v.Elem(), tinfos, deref, checkStruct)
-		}
-		return isnil
-	case reflect.Struct:
-		return isEmptyStruct(v, tinfos, deref, checkStruct)
-	case reflect.Map, reflect.Array, reflect.Chan:
-		return v.Len() == 0
-	}
-	return false
-}
-
-// --------------------------
-
-type atomicTypeInfoSlice struct { // expected to be 2 words
+type atomicTypeInfoSlice struct {
 	v unsafe.Pointer
-	_ [8]byte // padding
 }
 
 func (x *atomicTypeInfoSlice) load() *[]rtid2ti {
@@ -191,6 +123,9 @@ func (x *atomicTypeInfoSlice) store(p *[]rtid2ti) {
 // --------------------------
 func (d *Decoder) raw(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
+	// if urv.flag&unsafeFlagIndir != 0 {
+	// 	urv.ptr = *(*unsafe.Pointer)(urv.ptr)
+	// }
 	*(*[]byte)(urv.ptr) = d.rawBytes()
 }
 
@@ -204,214 +139,73 @@ func (d *Decoder) kBool(f *codecFnInfo, rv reflect.Value) {
 	*(*bool)(urv.ptr) = d.d.DecodeBool()
 }
 
-func (d *Decoder) kTime(f *codecFnInfo, rv reflect.Value) {
-	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*time.Time)(urv.ptr) = d.d.DecodeTime()
-}
-
 func (d *Decoder) kFloat32(f *codecFnInfo, rv reflect.Value) {
-	fv := d.d.DecodeFloat64()
-	if chkOvf.Float32(fv) {
-		d.errorf("float32 overflow: %v", fv)
-	}
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*float32)(urv.ptr) = float32(fv)
+	*(*float32)(urv.ptr) = float32(d.d.DecodeFloat(true))
 }
 
 func (d *Decoder) kFloat64(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*float64)(urv.ptr) = d.d.DecodeFloat64()
+	*(*float64)(urv.ptr) = d.d.DecodeFloat(false)
 }
 
 func (d *Decoder) kInt(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*int)(urv.ptr) = int(chkOvf.IntV(d.d.DecodeInt64(), intBitsize))
+	*(*int)(urv.ptr) = int(d.d.DecodeInt(intBitsize))
 }
 
 func (d *Decoder) kInt8(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*int8)(urv.ptr) = int8(chkOvf.IntV(d.d.DecodeInt64(), 8))
+	*(*int8)(urv.ptr) = int8(d.d.DecodeInt(8))
 }
 
 func (d *Decoder) kInt16(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*int16)(urv.ptr) = int16(chkOvf.IntV(d.d.DecodeInt64(), 16))
+	*(*int16)(urv.ptr) = int16(d.d.DecodeInt(16))
 }
 
 func (d *Decoder) kInt32(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*int32)(urv.ptr) = int32(chkOvf.IntV(d.d.DecodeInt64(), 32))
+	*(*int32)(urv.ptr) = int32(d.d.DecodeInt(32))
 }
 
 func (d *Decoder) kInt64(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*int64)(urv.ptr) = d.d.DecodeInt64()
+	*(*int64)(urv.ptr) = d.d.DecodeInt(64)
 }
 
 func (d *Decoder) kUint(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*uint)(urv.ptr) = uint(chkOvf.UintV(d.d.DecodeUint64(), uintBitsize))
+	*(*uint)(urv.ptr) = uint(d.d.DecodeUint(uintBitsize))
 }
 
 func (d *Decoder) kUintptr(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*uintptr)(urv.ptr) = uintptr(chkOvf.UintV(d.d.DecodeUint64(), uintBitsize))
+	*(*uintptr)(urv.ptr) = uintptr(d.d.DecodeUint(uintBitsize))
 }
 
 func (d *Decoder) kUint8(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*uint8)(urv.ptr) = uint8(chkOvf.UintV(d.d.DecodeUint64(), 8))
+	*(*uint8)(urv.ptr) = uint8(d.d.DecodeUint(8))
 }
 
 func (d *Decoder) kUint16(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*uint16)(urv.ptr) = uint16(chkOvf.UintV(d.d.DecodeUint64(), 16))
+	*(*uint16)(urv.ptr) = uint16(d.d.DecodeUint(16))
 }
 
 func (d *Decoder) kUint32(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*uint32)(urv.ptr) = uint32(chkOvf.UintV(d.d.DecodeUint64(), 32))
+	*(*uint32)(urv.ptr) = uint32(d.d.DecodeUint(32))
 }
 
 func (d *Decoder) kUint64(f *codecFnInfo, rv reflect.Value) {
 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	*(*uint64)(urv.ptr) = d.d.DecodeUint64()
+	*(*uint64)(urv.ptr) = d.d.DecodeUint(64)
 }
 
 // ------------
 
-func (e *Encoder) kBool(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeBool(*(*bool)(v.ptr))
-}
-
-func (e *Encoder) kTime(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeTime(*(*time.Time)(v.ptr))
-}
-
-func (e *Encoder) kString(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeString(cUTF8, *(*string)(v.ptr))
-}
-
-func (e *Encoder) kFloat64(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeFloat64(*(*float64)(v.ptr))
-}
-
-func (e *Encoder) kFloat32(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeFloat32(*(*float32)(v.ptr))
-}
-
-func (e *Encoder) kInt(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeInt(int64(*(*int)(v.ptr)))
-}
-
-func (e *Encoder) kInt8(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeInt(int64(*(*int8)(v.ptr)))
-}
-
-func (e *Encoder) kInt16(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeInt(int64(*(*int16)(v.ptr)))
-}
-
-func (e *Encoder) kInt32(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeInt(int64(*(*int32)(v.ptr)))
-}
-
-func (e *Encoder) kInt64(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeInt(int64(*(*int64)(v.ptr)))
-}
-
-func (e *Encoder) kUint(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeUint(uint64(*(*uint)(v.ptr)))
-}
-
-func (e *Encoder) kUint8(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeUint(uint64(*(*uint8)(v.ptr)))
-}
-
-func (e *Encoder) kUint16(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeUint(uint64(*(*uint16)(v.ptr)))
-}
-
-func (e *Encoder) kUint32(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeUint(uint64(*(*uint32)(v.ptr)))
-}
-
-func (e *Encoder) kUint64(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeUint(uint64(*(*uint64)(v.ptr)))
-}
-
-func (e *Encoder) kUintptr(f *codecFnInfo, rv reflect.Value) {
-	v := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-	e.e.EncodeUint(uint64(*(*uintptr)(v.ptr)))
-}
-
-// ------------
-
-// func (d *Decoder) raw(f *codecFnInfo, rv reflect.Value) {
-// 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-// 	// if urv.flag&unsafeFlagIndir != 0 {
-// 	// 	urv.ptr = *(*unsafe.Pointer)(urv.ptr)
-// 	// }
-// 	*(*[]byte)(urv.ptr) = d.rawBytes()
-// }
-
-// func rv0t(rt reflect.Type) reflect.Value {
-// 	ut := (*unsafeIntf)(unsafe.Pointer(&rt))
-// 	// we need to determine whether ifaceIndir, and then whether to just pass 0 as the ptr
-// 	uv := unsafeReflectValue{ut.word, &zeroRTv, flag(rt.Kind())}
-// 	return *(*reflect.Value)(unsafe.Pointer(&uv})
-// }
-
-// func rv2i(rv reflect.Value) interface{} {
-// 	urv := (*unsafeReflectValue)(unsafe.Pointer(&rv))
-// 	// true references (map, func, chan, ptr - NOT slice) may be double-referenced as flagIndir
-// 	var ptr unsafe.Pointer
-// 	// kk := reflect.Kind(urv.flag & (1<<5 - 1))
-// 	// if (kk == reflect.Map || kk == reflect.Ptr || kk == reflect.Chan || kk == reflect.Func) && urv.flag&unsafeFlagIndir != 0 {
-// 	if refBitset.isset(byte(urv.flag&(1<<5-1))) && urv.flag&unsafeFlagIndir != 0 {
-// 		ptr = *(*unsafe.Pointer)(urv.ptr)
-// 	} else {
-// 		ptr = urv.ptr
-// 	}
-// 	return *(*interface{})(unsafe.Pointer(&unsafeIntf{typ: urv.typ, word: ptr}))
-// 	// return *(*interface{})(unsafe.Pointer(&unsafeIntf{word: *(*unsafe.Pointer)(urv.ptr), typ: urv.typ}))
-// 	// return *(*interface{})(unsafe.Pointer(&unsafeIntf{word: urv.ptr, typ: urv.typ}))
-// }
-
-// func definitelyNil(v interface{}) bool {
-// 	var ui *unsafeIntf = (*unsafeIntf)(unsafe.Pointer(&v))
-// 	if ui.word == nil {
-// 		return true
-// 	}
-// 	var tk = reflect.TypeOf(v).Kind()
-// 	return (tk == reflect.Interface || tk == reflect.Slice) && *(*unsafe.Pointer)(ui.word) == nil
-// 	fmt.Printf(">>>> definitely nil: isnil: %v, TYPE: \t%T, word: %v, *word: %v, type: %v, nil: %v\n",
-// 	v == nil, v, word, *((*unsafe.Pointer)(word)), ui.typ, nil)
-// }
-
-// func keepAlive4BytesView(v string) {
-// 	runtime.KeepAlive(v)
-// }
-
-// func keepAlive4StringView(v []byte) {
-// 	runtime.KeepAlive(v)
-// }
-
 // func rt2id(rt reflect.Type) uintptr {
 // 	return uintptr(((*unsafeIntf)(unsafe.Pointer(&rt))).word)
 // 	// var i interface{} = rt