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authorTed Yin <[email protected]>2020-09-18 13:14:29 -0400
committerGitHub <[email protected]>2020-09-18 13:14:29 -0400
commitd048937c48753d9eaef771bf71820cf95d79df26 (patch)
tree1a7f65fcd72e77092525ab01625b8b9d365e3e40 /accounts/abi/reflect.go
parent7d1388c743b4ec8f4a86bea95bfada785dee83f7 (diff)
parent7d8c85cf8895b0f998d8eafb02f99d5b689fcd59 (diff)
Merge pull request #34 from ava-labs/devv0.3.0-rc.5
Dev
Diffstat (limited to 'accounts/abi/reflect.go')
-rw-r--r--accounts/abi/reflect.go226
1 files changed, 0 insertions, 226 deletions
diff --git a/accounts/abi/reflect.go b/accounts/abi/reflect.go
deleted file mode 100644
index 73ca8fa..0000000
--- a/accounts/abi/reflect.go
+++ /dev/null
@@ -1,226 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package abi
-
-import (
- "fmt"
- "reflect"
- "strings"
-)
-
-// indirect recursively dereferences the value until it either gets the value
-// or finds a big.Int
-func indirect(v reflect.Value) reflect.Value {
- if v.Kind() == reflect.Ptr && v.Elem().Type() != derefbigT {
- return indirect(v.Elem())
- }
- return v
-}
-
-// indirectInterfaceOrPtr recursively dereferences the value until value is not interface.
-func indirectInterfaceOrPtr(v reflect.Value) reflect.Value {
- if (v.Kind() == reflect.Interface || v.Kind() == reflect.Ptr) && v.Elem().IsValid() {
- return indirect(v.Elem())
- }
- return v
-}
-
-// reflectIntKind returns the reflect using the given size and
-// unsignedness.
-func reflectIntKindAndType(unsigned bool, size int) (reflect.Kind, reflect.Type) {
- switch size {
- case 8:
- if unsigned {
- return reflect.Uint8, uint8T
- }
- return reflect.Int8, int8T
- case 16:
- if unsigned {
- return reflect.Uint16, uint16T
- }
- return reflect.Int16, int16T
- case 32:
- if unsigned {
- return reflect.Uint32, uint32T
- }
- return reflect.Int32, int32T
- case 64:
- if unsigned {
- return reflect.Uint64, uint64T
- }
- return reflect.Int64, int64T
- }
- return reflect.Ptr, bigT
-}
-
-// mustArrayToBytesSlice creates a new byte slice with the exact same size as value
-// and copies the bytes in value to the new slice.
-func mustArrayToByteSlice(value reflect.Value) reflect.Value {
- slice := reflect.MakeSlice(reflect.TypeOf([]byte{}), value.Len(), value.Len())
- reflect.Copy(slice, value)
- return slice
-}
-
-// set attempts to assign src to dst by either setting, copying or otherwise.
-//
-// set is a bit more lenient when it comes to assignment and doesn't force an as
-// strict ruleset as bare `reflect` does.
-func set(dst, src reflect.Value) error {
- dstType, srcType := dst.Type(), src.Type()
- switch {
- case dstType.Kind() == reflect.Interface && dst.Elem().IsValid():
- return set(dst.Elem(), src)
- case dstType.Kind() == reflect.Ptr && dstType.Elem() != derefbigT:
- return set(dst.Elem(), src)
- case srcType.AssignableTo(dstType) && dst.CanSet():
- dst.Set(src)
- case dstType.Kind() == reflect.Slice && srcType.Kind() == reflect.Slice:
- return setSlice(dst, src)
- default:
- return fmt.Errorf("abi: cannot unmarshal %v in to %v", src.Type(), dst.Type())
- }
- return nil
-}
-
-// setSlice attempts to assign src to dst when slices are not assignable by default
-// e.g. src: [][]byte -> dst: [][15]byte
-func setSlice(dst, src reflect.Value) error {
- slice := reflect.MakeSlice(dst.Type(), src.Len(), src.Len())
- for i := 0; i < src.Len(); i++ {
- v := src.Index(i)
- reflect.Copy(slice.Index(i), v)
- }
-
- dst.Set(slice)
- return nil
-}
-
-// requireAssignable assures that `dest` is a pointer and it's not an interface.
-func requireAssignable(dst, src reflect.Value) error {
- if dst.Kind() != reflect.Ptr && dst.Kind() != reflect.Interface {
- return fmt.Errorf("abi: cannot unmarshal %v into %v", src.Type(), dst.Type())
- }
- return nil
-}
-
-// requireUnpackKind verifies preconditions for unpacking `args` into `kind`
-func requireUnpackKind(v reflect.Value, t reflect.Type, k reflect.Kind,
- args Arguments) error {
-
- switch k {
- case reflect.Struct:
- case reflect.Slice, reflect.Array:
- if minLen := args.LengthNonIndexed(); v.Len() < minLen {
- return fmt.Errorf("abi: insufficient number of elements in the list/array for unpack, want %d, got %d",
- minLen, v.Len())
- }
- default:
- return fmt.Errorf("abi: cannot unmarshal tuple into %v", t)
- }
- return nil
-}
-
-// mapArgNamesToStructFields maps a slice of argument names to struct fields.
-// first round: for each Exportable field that contains a `abi:""` tag
-// and this field name exists in the given argument name list, pair them together.
-// second round: for each argument name that has not been already linked,
-// find what variable is expected to be mapped into, if it exists and has not been
-// used, pair them.
-// Note this function assumes the given value is a struct value.
-func mapArgNamesToStructFields(argNames []string, value reflect.Value) (map[string]string, error) {
- typ := value.Type()
-
- abi2struct := make(map[string]string)
- struct2abi := make(map[string]string)
-
- // first round ~~~
- for i := 0; i < typ.NumField(); i++ {
- structFieldName := typ.Field(i).Name
-
- // skip private struct fields.
- if structFieldName[:1] != strings.ToUpper(structFieldName[:1]) {
- continue
- }
- // skip fields that have no abi:"" tag.
- var ok bool
- var tagName string
- if tagName, ok = typ.Field(i).Tag.Lookup("abi"); !ok {
- continue
- }
- // check if tag is empty.
- if tagName == "" {
- return nil, fmt.Errorf("struct: abi tag in '%s' is empty", structFieldName)
- }
- // check which argument field matches with the abi tag.
- found := false
- for _, arg := range argNames {
- if arg == tagName {
- if abi2struct[arg] != "" {
- return nil, fmt.Errorf("struct: abi tag in '%s' already mapped", structFieldName)
- }
- // pair them
- abi2struct[arg] = structFieldName
- struct2abi[structFieldName] = arg
- found = true
- }
- }
- // check if this tag has been mapped.
- if !found {
- return nil, fmt.Errorf("struct: abi tag '%s' defined but not found in abi", tagName)
- }
- }
-
- // second round ~~~
- for _, argName := range argNames {
-
- structFieldName := ToCamelCase(argName)
-
- if structFieldName == "" {
- return nil, fmt.Errorf("abi: purely underscored output cannot unpack to struct")
- }
-
- // this abi has already been paired, skip it... unless there exists another, yet unassigned
- // struct field with the same field name. If so, raise an error:
- // abi: [ { "name": "value" } ]
- // struct { Value *big.Int , Value1 *big.Int `abi:"value"`}
- if abi2struct[argName] != "" {
- if abi2struct[argName] != structFieldName &&
- struct2abi[structFieldName] == "" &&
- value.FieldByName(structFieldName).IsValid() {
- return nil, fmt.Errorf("abi: multiple variables maps to the same abi field '%s'", argName)
- }
- continue
- }
-
- // return an error if this struct field has already been paired.
- if struct2abi[structFieldName] != "" {
- return nil, fmt.Errorf("abi: multiple outputs mapping to the same struct field '%s'", structFieldName)
- }
-
- if value.FieldByName(structFieldName).IsValid() {
- // pair them
- abi2struct[argName] = structFieldName
- struct2abi[structFieldName] = argName
- } else {
- // not paired, but annotate as used, to detect cases like
- // abi : [ { "name": "value" }, { "name": "_value" } ]
- // struct { Value *big.Int }
- struct2abi[structFieldName] = argName
- }
- }
- return abi2struct, nil
-}