mobile: initial wrappers for mobile support

1 files changed, 187 insertions, 0 deletions

diff --git a/mobile/common.go b/mobile/common.go
new file mode 100644
index 000000000..ab1810bf1
--- /dev/null
+++ b/mobile/common.go
@@ -0,0 +1,187 @@
+// 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/>.
+
+// Contains all the wrappers from the common package.
+
+package geth
+
+import (
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// Hash represents the 32 byte Keccak256 hash of arbitrary data.
+type Hash struct {
+	hash common.Hash
+}
+
+// NewHashFromBytes converts a slice of bytes to a hash value.
+func NewHashFromBytes(hash []byte) (*Hash, error) {
+	h := new(Hash)
+	if err := h.SetBytes(hash); err != nil {
+		return nil, err
+	}
+	return h, nil
+}
+
+// NewHashFromHex converts a hex string to a hash value.
+func NewHashFromHex(hash string) (*Hash, error) {
+	h := new(Hash)
+	if err := h.SetHex(hash); err != nil {
+		return nil, err
+	}
+	return h, nil
+}
+
+// SetBytes sets the specified slice of bytes as the hash value.
+func (h *Hash) SetBytes(hash []byte) error {
+	if length := len(hash); length != common.HashLength {
+		return fmt.Errorf("invalid hash length: %v != %v", length, common.HashLength)
+	}
+	copy(h.hash[:], hash)
+	return nil
+}
+
+// GetBytes retrieves the byte representation of the hash.
+func (h *Hash) GetBytes() []byte {
+	return h.hash[:]
+}
+
+// SetHex sets the specified hex string as the hash value.
+func (h *Hash) SetHex(hash string) error {
+	hash = strings.ToLower(hash)
+	if len(hash) >= 2 && hash[:2] == "0x" {
+		hash = hash[2:]
+	}
+	if length := len(hash); length != 2*common.HashLength {
+		return fmt.Errorf("invalid hash hex length: %v != %v", length, 2*common.HashLength)
+	}
+	bin, err := hex.DecodeString(hash)
+	if err != nil {
+		return err
+	}
+	copy(h.hash[:], bin)
+	return nil
+}
+
+// GetHex retrieves the hex string representation of the hash.
+func (h *Hash) GetHex() string {
+	return h.hash.Hex()
+}
+
+// Hashes represents a slice of hashes.
+type Hashes struct{ hashes []common.Hash }
+
+// Size returns the number of hashes in the slice.
+func (h *Hashes) Size() int {
+	return len(h.hashes)
+}
+
+// Get returns the hash at the given index from the slice.
+func (h *Hashes) Get(index int) (*Hash, error) {
+	if index < 0 || index >= len(h.hashes) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Hash{h.hashes[index]}, nil
+}
+
+// Address represents the 20 byte address of an Ethereum account.
+type Address struct {
+	address common.Address
+}
+
+// NewAddressFromBytes converts a slice of bytes to a hash value.
+func NewAddressFromBytes(address []byte) (*Address, error) {
+	a := new(Address)
+	if err := a.SetBytes(address); err != nil {
+		return nil, err
+	}
+	return a, nil
+}
+
+// NewAddressFromHex converts a hex string to a address value.
+func NewAddressFromHex(address string) (*Address, error) {
+	a := new(Address)
+	if err := a.SetHex(address); err != nil {
+		return nil, err
+	}
+	return a, nil
+}
+
+// SetBytes sets the specified slice of bytes as the address value.
+func (a *Address) SetBytes(address []byte) error {
+	if length := len(address); length != common.AddressLength {
+		return fmt.Errorf("invalid address length: %v != %v", length, common.AddressLength)
+	}
+	copy(a.address[:], address)
+	return nil
+}
+
+// GetBytes retrieves the byte representation of the address.
+func (a *Address) GetBytes() []byte {
+	return a.address[:]
+}
+
+// SetHex sets the specified hex string as the address value.
+func (a *Address) SetHex(address string) error {
+	address = strings.ToLower(address)
+	if len(address) >= 2 && address[:2] == "0x" {
+		address = address[2:]
+	}
+	if length := len(address); length != 2*common.AddressLength {
+		return fmt.Errorf("invalid address hex length: %v != %v", length, 2*common.AddressLength)
+	}
+	bin, err := hex.DecodeString(address)
+	if err != nil {
+		return err
+	}
+	copy(a.address[:], bin)
+	return nil
+}
+
+// GetHex retrieves the hex string representation of the address.
+func (a *Address) GetHex() string {
+	return a.address.Hex()
+}
+
+// Addresses represents a slice of addresses.
+type Addresses struct{ addresses []common.Address }
+
+// Size returns the number of addresses in the slice.
+func (a *Addresses) Size() int {
+	return len(a.addresses)
+}
+
+// Get returns the address at the given index from the slice.
+func (a *Addresses) Get(index int) (*Address, error) {
+	if index < 0 || index >= len(a.addresses) {
+		return nil, errors.New("index out of bounds")
+	}
+	return &Address{a.addresses[index]}, nil
+}
+
+// Set sets the address at the given index in the slice.
+func (a *Addresses) Set(index int, address *Address) error {
+	if index < 0 || index >= len(a.addresses) {
+		return errors.New("index out of bounds")
+	}
+	a.addresses[index] = address.address
+	return nil
+}