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-rw-r--r--packages/contracts/src/contracts/current/test/TestLibBytes/TestLibBytes.sol30
-rw-r--r--packages/contracts/src/contracts/current/test/TestLibMem/TestLibMem.sol56
-rw-r--r--packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol125
-rw-r--r--packages/contracts/src/contracts/current/utils/LibMem/LibMem.sol142
-rw-r--r--packages/contracts/src/utils/artifacts.ts2
-rw-r--r--packages/contracts/src/utils/types.ts1
6 files changed, 150 insertions, 206 deletions
diff --git a/packages/contracts/src/contracts/current/test/TestLibBytes/TestLibBytes.sol b/packages/contracts/src/contracts/current/test/TestLibBytes/TestLibBytes.sol
index 6f1898acd..d9b246b29 100644
--- a/packages/contracts/src/contracts/current/test/TestLibBytes/TestLibBytes.sol
+++ b/packages/contracts/src/contracts/current/test/TestLibBytes/TestLibBytes.sol
@@ -221,4 +221,34 @@ contract TestLibBytes is
writeBytes(b, index, input);
return b;
}
+
+ /// @dev Copies a block of memory from one location to another.
+ /// @param mem Memory contents we want to apply memCopy to
+ /// @param dest Destination offset into <mem>.
+ /// @param source Source offset into <mem>.
+ /// @param length Length of bytes to copy from <source> to <dest>
+ /// @return mem Memory contents after calling memCopy.
+ function testMemcpy(
+ bytes mem,
+ uint256 dest,
+ uint256 source,
+ uint256 length
+ )
+ public // not external, we need input in memory
+ pure
+ returns (bytes)
+ {
+ // Sanity check. Overflows are not checked.
+ require(source + length <= mem.length);
+ require(dest + length <= mem.length);
+
+ // Get pointer to memory contents
+ uint256 offset = getMemAddress(mem) + 32;
+
+ // Execute memCopy adjusted for memory array location
+ memCopy(offset + dest, offset + source, length);
+
+ // Return modified memory contents
+ return mem;
+ }
}
diff --git a/packages/contracts/src/contracts/current/test/TestLibMem/TestLibMem.sol b/packages/contracts/src/contracts/current/test/TestLibMem/TestLibMem.sol
deleted file mode 100644
index b7e2e06b8..000000000
--- a/packages/contracts/src/contracts/current/test/TestLibMem/TestLibMem.sol
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
-
- Copyright 2018 ZeroEx Intl.
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-
-*/
-
-pragma solidity ^0.4.24;
-
-import "../../utils/LibMem/LibMem.sol";
-
-contract TestLibMem is
- LibMem
-{
-
- /// @dev Copies a block of memory from one location to another.
- /// @param mem Memory contents we want to apply memCopy to
- /// @param dest Destination offset into <mem>.
- /// @param source Source offset into <mem>.
- /// @param length Length of bytes to copy from <source> to <dest>
- /// @return mem Memory contents after calling memCopy.
- function testMemcpy(
- bytes mem,
- uint256 dest,
- uint256 source,
- uint256 length
- )
- public // not external, we need input in memory
- pure
- returns (bytes)
- {
- // Sanity check. Overflows are not checked.
- require(source + length <= mem.length);
- require(dest + length <= mem.length);
-
- // Get pointer to memory contents
- uint256 offset = getMemAddress(mem) + 32;
-
- // Execute memCopy adjusted for memory array location
- memCopy(offset + dest, offset + source, length);
-
- // Return modified memory contents
- return mem;
- }
-}
diff --git a/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol b/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol
index 10d7ce41a..cb63e38e6 100644
--- a/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol
+++ b/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol
@@ -18,11 +18,7 @@
pragma solidity ^0.4.24;
-import "../LibMem/LibMem.sol";
-
-contract LibBytes is
- LibMem
-{
+contract LibBytes {
// Revert reasons
string constant GREATER_THAN_ZERO_LENGTH_REQUIRED = "GREATER_THAN_ZERO_LENGTH_REQUIRED";
@@ -32,6 +28,125 @@ contract LibBytes is
string constant GREATER_OR_EQUAL_TO_NESTED_BYTES_LENGTH_REQUIRED = "GREATER_OR_EQUAL_TO_NESTED_BYTES_LENGTH_REQUIRED";
string constant GREATER_OR_EQUAL_TO_SOURCE_BYTES_LENGTH_REQUIRED = "GREATER_OR_EQUAL_TO_SOURCE_BYTES_LENGTH_REQUIRED";
+ /// @dev Gets the memory address for a byte array.
+ /// @param input Byte array to lookup.
+ /// @return memoryAddress Memory address of byte array.
+ function getMemAddress(bytes memory input)
+ internal
+ pure
+ returns (uint256 memoryAddress)
+ {
+ assembly {
+ memoryAddress := input
+ }
+ return memoryAddress;
+ }
+
+ /// @dev Copies `length` bytes from memory location `source` to `dest`.
+ /// @param dest memory address to copy bytes to.
+ /// @param source memory address to copy bytes from.
+ /// @param length number of bytes to copy.
+ function memCopy(
+ uint256 dest,
+ uint256 source,
+ uint256 length
+ )
+ internal
+ pure
+ {
+ if (length < 32) {
+ // Handle a partial word by reading destination and masking
+ // off the bits we are interested in.
+ // This correctly handles overlap, zero lengths and source == dest
+ assembly {
+ let mask := sub(exp(256, sub(32, length)), 1)
+ let s := and(mload(source), not(mask))
+ let d := and(mload(dest), mask)
+ mstore(dest, or(s, d))
+ }
+ } else {
+ // Skip the O(length) loop when source == dest.
+ if (source == dest) {
+ return;
+ }
+
+ // For large copies we copy whole words at a time. The final
+ // word is aligned to the end of the range (instead of after the
+ // previous) to handle partial words. So a copy will look like this:
+ //
+ // ####
+ // ####
+ // ####
+ // ####
+ //
+ // We handle overlap in the source and destination range by
+ // changing the copying direction. This prevents us from
+ // overwriting parts of source that we still need to copy.
+ //
+ // This correctly handles source == dest
+ //
+ if (source > dest) {
+ assembly {
+ // We subtract 32 from `sEnd` and `dEnd` because it
+ // is easier to compare with in the loop, and these
+ // are also the addresses we need for copying the
+ // last bytes.
+ length := sub(length, 32)
+ let sEnd := add(source, length)
+ let dEnd := add(dest, length)
+
+ // Remember the last 32 bytes of source
+ // This needs to be done here and not after the loop
+ // because we may have overwritten the last bytes in
+ // source already due to overlap.
+ let last := mload(sEnd)
+
+ // Copy whole words front to back
+ // Note: the first check is always true,
+ // this could have been a do-while loop.
+ for {} lt(source, sEnd) {} {
+ mstore(dest, mload(source))
+ source := add(source, 32)
+ dest := add(dest, 32)
+ }
+
+ // Write the last 32 bytes
+ mstore(dEnd, last)
+ }
+ } else {
+ assembly {
+ // We subtract 32 from `sEnd` and `dEnd` because those
+ // are the starting points when copying a word at the end.
+ length := sub(length, 32)
+ let sEnd := add(source, length)
+ let dEnd := add(dest, length)
+
+ // Remember the first 32 bytes of source
+ // This needs to be done here and not after the loop
+ // because we may have overwritten the first bytes in
+ // source already due to overlap.
+ let first := mload(source)
+
+ // Copy whole words back to front
+ // We use a signed comparisson here to allow dEnd to become
+ // negative (happens when source and dest < 32). Valid
+ // addresses in local memory will never be larger than
+ // 2**255, so they can be safely re-interpreted as signed.
+ // Note: the first check is always true,
+ // this could have been a do-while loop.
+ for {} slt(dest, dEnd) {} {
+ mstore(dEnd, mload(sEnd))
+ sEnd := sub(sEnd, 32)
+ dEnd := sub(dEnd, 32)
+ }
+
+ // Write the first 32 bytes
+ mstore(dest, first)
+ }
+ }
+ }
+ }
+
/// @dev Pops the last byte off of a byte array by modifying its length.
/// @param b Byte array that will be modified.
/// @return The byte that was popped off.
diff --git a/packages/contracts/src/contracts/current/utils/LibMem/LibMem.sol b/packages/contracts/src/contracts/current/utils/LibMem/LibMem.sol
deleted file mode 100644
index 97fb5fb0f..000000000
--- a/packages/contracts/src/contracts/current/utils/LibMem/LibMem.sol
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
-
- Copyright 2018 ZeroEx Intl.
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-
-*/
-
-pragma solidity ^0.4.24;
-
-contract LibMem
-{
-
- /// @dev Gets the memory address for a byte array.
- /// @param input Byte array to lookup.
- /// @return memoryAddress Memory address of byte array.
- function getMemAddress(bytes memory input)
- internal
- pure
- returns (uint256 memoryAddress)
- {
- assembly {
- memoryAddress := input
- }
- return memoryAddress;
- }
-
- /// @dev Copies `length` bytes from memory location `source` to `dest`.
- /// @param dest memory address to copy bytes to.
- /// @param source memory address to copy bytes from.
- /// @param length number of bytes to copy.
- function memCopy(
- uint256 dest,
- uint256 source,
- uint256 length
- )
- internal
- pure
- {
- if (length < 32) {
- // Handle a partial word by reading destination and masking
- // off the bits we are interested in.
- // This correctly handles overlap, zero lengths and source == dest
- assembly {
- let mask := sub(exp(256, sub(32, length)), 1)
- let s := and(mload(source), not(mask))
- let d := and(mload(dest), mask)
- mstore(dest, or(s, d))
- }
- } else {
- // Skip the O(length) loop when source == dest.
- if (source == dest) {
- return;
- }
-
- // For large copies we copy whole words at a time. The final
- // word is aligned to the end of the range (instead of after the
- // previous) to handle partial words. So a copy will look like this:
- //
- // ####
- // ####
- // ####
- // ####
- //
- // We handle overlap in the source and destination range by
- // changing the copying direction. This prevents us from
- // overwriting parts of source that we still need to copy.
- //
- // This correctly handles source == dest
- //
- if (source > dest) {
- assembly {
- // We subtract 32 from `sEnd` and `dEnd` because it
- // is easier to compare with in the loop, and these
- // are also the addresses we need for copying the
- // last bytes.
- length := sub(length, 32)
- let sEnd := add(source, length)
- let dEnd := add(dest, length)
-
- // Remember the last 32 bytes of source
- // This needs to be done here and not after the loop
- // because we may have overwritten the last bytes in
- // source already due to overlap.
- let last := mload(sEnd)
-
- // Copy whole words front to back
- // Note: the first check is always true,
- // this could have been a do-while loop.
- for {} lt(source, sEnd) {} {
- mstore(dest, mload(source))
- source := add(source, 32)
- dest := add(dest, 32)
- }
-
- // Write the last 32 bytes
- mstore(dEnd, last)
- }
- } else {
- assembly {
- // We subtract 32 from `sEnd` and `dEnd` because those
- // are the starting points when copying a word at the end.
- length := sub(length, 32)
- let sEnd := add(source, length)
- let dEnd := add(dest, length)
-
- // Remember the first 32 bytes of source
- // This needs to be done here and not after the loop
- // because we may have overwritten the first bytes in
- // source already due to overlap.
- let first := mload(source)
-
- // Copy whole words back to front
- // We use a signed comparisson here to allow dEnd to become
- // negative (happens when source and dest < 32). Valid
- // addresses in local memory will never be larger than
- // 2**255, so they can be safely re-interpreted as signed.
- // Note: the first check is always true,
- // this could have been a do-while loop.
- for {} slt(dest, dEnd) {} {
- mstore(dEnd, mload(sEnd))
- sEnd := sub(sEnd, 32)
- dEnd := sub(dEnd, 32)
- }
-
- // Write the first 32 bytes
- mstore(dest, first)
- }
- }
- }
- }
-}
diff --git a/packages/contracts/src/utils/artifacts.ts b/packages/contracts/src/utils/artifacts.ts
index 4375d87c6..fa18cc9d2 100644
--- a/packages/contracts/src/utils/artifacts.ts
+++ b/packages/contracts/src/utils/artifacts.ts
@@ -14,7 +14,6 @@ import * as MultiSigWalletWithTimeLock from '../artifacts/MultiSigWalletWithTime
import * as TestAssetDataDecoders from '../artifacts/TestAssetDataDecoders.json';
import * as TestAssetProxyDispatcher from '../artifacts/TestAssetProxyDispatcher.json';
import * as TestLibBytes from '../artifacts/TestLibBytes.json';
-import * as TestLibMem from '../artifacts/TestLibMem.json';
import * as TestLibs from '../artifacts/TestLibs.json';
import * as TestSignatureValidator from '../artifacts/TestSignatureValidator.json';
import * as TestValidator from '../artifacts/TestValidator.json';
@@ -40,7 +39,6 @@ export const artifacts = {
TestAssetProxyDispatcher: (TestAssetProxyDispatcher as any) as ContractArtifact,
TestAssetDataDecoders: (TestAssetDataDecoders as any) as ContractArtifact,
TestLibBytes: (TestLibBytes as any) as ContractArtifact,
- TestLibMem: (TestLibMem as any) as ContractArtifact,
TestLibs: (TestLibs as any) as ContractArtifact,
TestSignatureValidator: (TestSignatureValidator as any) as ContractArtifact,
TestValidator: (TestValidator as any) as ContractArtifact,
diff --git a/packages/contracts/src/utils/types.ts b/packages/contracts/src/utils/types.ts
index 7a1f92afd..5dfac64fc 100644
--- a/packages/contracts/src/utils/types.ts
+++ b/packages/contracts/src/utils/types.ts
@@ -92,7 +92,6 @@ export enum ContractName {
Arbitrage = 'Arbitrage',
TestAssetDataDecoders = 'TestAssetDataDecoders',
TestAssetProxyDispatcher = 'TestAssetProxyDispatcher',
- TestLibMem = 'TestLibMem',
TestLibs = 'TestLibs',
TestSignatureValidator = 'TestSignatureValidator',
ERC20Proxy = 'ERC20Proxy',