packages/resolver/solidity/AssertBytes32Array.sol
//SPDX-License-Identifier: MIT
pragma solidity >= 0.4.15 < 0.9.0;
library AssertBytes32Array {
uint8 constant ZERO = uint8(bytes1('0'));
uint8 constant A = uint8(bytes1('a'));
/*
Event: TestEvent
Fired when an assertion is made.
Params:
result (bool) - Whether or not the assertion holds.
message (string) - A message to display if the assertion does not hold.
*/
event TestEvent(bool indexed result, string message);
// ************************************** bytes32[] **************************************
/*
Function: equal(bytes32[])
Assert that two 'bytes32[]' are equal.
: arrA.length == arrB.length
and, for all valid indices 'i'
: arrA[i] == arrB[i]
Params:
A (bytes32[]) - The first array.
B (bytes32[]) - The second array.
message (string) - A message that is sent if the assertion fails.
Returns:
result (bool) - The result.
*/
function equal(bytes32[] memory arrA, bytes32[] memory arrB, string memory message) public returns (bool result) {
result = arrA.length == arrB.length;
if (result) {
for (uint i = 0; i < arrA.length; i++) {
if (arrA[i] != arrB[i]) {
result = false;
break;
}
}
}
_report(result, message);
}
/*
Function: notEqual(bytes32[])
Assert that two 'bytes32[]' are not equal.
: arrA.length != arrB.length
or, for some valid index 'i'
: arrA[i] != arrB[i]
Params:
A (bytes32[]) - The first string.
B (bytes32[]) - The second string.
message (string) - A message that is sent if the assertion fails.
Returns:
result (bool) - The result.
*/
function notEqual(bytes32[] memory arrA, bytes32[] memory arrB, string memory message) public returns (bool result) {
result = arrA.length == arrB.length;
if (result) {
for (uint i = 0; i < arrA.length; i++) {
if (arrA[i] != arrB[i]) {
result = false;
break;
}
}
}
result = !result;
_report(result, message);
}
/*
Function: lengthEqual(bytes32[])
Assert that the length of an 'bytes32[]' is equal to a given value.
: arr.length == length
Params:
arr (bytes32[]) - The array.
length (uint) - The length.
message (string) - A message that is sent if the assertion fails.
Returns:
result (bool) - The result.
*/
function lengthEqual(bytes32[] memory arr, uint length, string memory message) public returns (bool result) {
uint arrLength = arr.length;
if (arrLength == length)
_report(result, "");
else
_report(result, _appendTagged(_tag(arrLength, "Tested"), _tag(length, "Against"), message));
}
/*
Function: lengthNotEqual(bytes32[])
Assert that the length of an 'bytes32[]' is not equal to a given value.
: arr.length != length
Params:
arr (bytes32[]) - The array.
length (uint) - The length.
message (string) - A message that is sent if the assertion fails.
Returns:
result (bool) - The result.
*/
function lengthNotEqual(bytes32[] memory arr, uint length, string memory message) public returns (bool result) {
uint arrLength = arr.length;
if (arrLength != arr.length)
_report(result, "");
else
_report(result, _appendTagged(_tag(arrLength, "Tested"), _tag(length, "Against"), message));
}
/******************************** internal ********************************/
/*
Function: _report
Internal function for triggering <TestEvent>.
Params:
result (bool) - The test result (true or false).
message (string) - The message that is sent if the assertion fails.
*/
function _report(bool result, string memory message) internal {
if(result)
emit TestEvent(true, "");
else
emit TestEvent(false, message);
}
/*
Function: _utoa(uint)
Convert an unsigned integer to a string.
Params:
n (uint) - The unsigned integer.
radix (uint8) - A number between 2 and 16 (inclusive). Characters used are 0-9,a-f
Returns:
result (string) - The resulting string.
*/
function _utoa(uint n, uint8 radix) internal pure returns (string memory) {
if (n == 0 || radix < 2 || radix > 16)
return '0';
bytes memory bts = new bytes(256);
uint i;
while (n > 0) {
bts[i++] = _utoa(uint8(n % radix)); // Turn it to ascii.
n /= radix;
}
// Reverse
bytes memory rev = new bytes(i);
for (uint j = 0; j < i; j++)
rev[j] = bts[i - j - 1];
return string(rev);
}
/*
Function: _utoa(uint8)
Convert an unsigned 8-bit integer to its ASCII byte representation. Numbers 0-9 are converted to '0'-'9',
numbers 10-16 to 'a'-'f'. Numbers larger then 16 return the null byte.
Params:
u (uint8) - The unsigned 8-bit integer.
Returns:
result (string) - The ASCII byte.
*/
function _utoa(uint8 u) internal pure returns (bytes1) {
if (u < 10)
return bytes1(u + ZERO);
else if (u < 16)
return bytes1(u - 10 + A);
else
return 0;
}
/*
function htoa(address addr) constant returns (string) {
bytes memory bts = new bytes(40);
bytes20 addrBts = bytes20(addr);
for (uint i = 0; i < 20; i++) {
bts[2*i] = addrBts[i] % 16;
bts[2*i + 1] = (addrBts[i] / 16) % 16;
}
return string(bts);
}
*/
/*
Function: _tag(string)
Add a tag to a string. The 'value' and 'tag' strings are returned on the form "tag: value".
Params:
value (string) - The value.
tag (string) - The tag.
Returns:
result (string) - "tag: value"
*/
function _tag(string memory value, string memory tag) internal pure returns (string memory) {
bytes memory valueB = bytes(value);
bytes memory tagB = bytes(tag);
uint vl = valueB.length;
uint tl = tagB.length;
bytes memory newB = new bytes(vl + tl + 2);
uint i;
uint j;
for (i = 0; i < tl; i++)
newB[j++] = tagB[i];
newB[j++] = ':';
newB[j++] = ' ';
for (i = 0; i < vl; i++)
newB[j++] = valueB[i];
return string(newB);
}
/*
Function: _tag(uint)
Add a tag to an uint.
Params:
value (uint) - The value.
tag (string) - The tag.
Returns:
result (string) - "tag: _utoa(value)"
*/
function _tag(uint value, string memory tag) internal pure returns (string memory) {
string memory nstr = _utoa(value, 10);
return _tag(nstr, tag);
}
/*
Function: _appendTagged(string, string)
Append two tagged values to a string.
Params:
tagged0 (string) - The first tagged value.
tagged1 (string) - The second tagged value.
str (string) - The string.
Returns:
result (string) - "str (tagged0, tagged1)"
*/
function _appendTagged(string memory tagged0, string memory tagged1, string memory str) internal pure returns (string memory) {
bytes memory tagged0B = bytes(tagged0);
bytes memory tagged1B = bytes(tagged1);
bytes memory strB = bytes(str);
uint sl = strB.length;
uint t0l = tagged0B.length;
uint t1l = tagged1B.length;
bytes memory newB = new bytes(sl + t0l + t1l + 5);
uint i;
uint j;
for (i = 0; i < sl; i++)
newB[j++] = strB[i];
newB[j++] = ' ';
newB[j++] = '(';
for (i = 0; i < t0l; i++)
newB[j++] = tagged0B[i];
newB[j++] = ',';
newB[j++] = ' ';
for (i = 0; i < t1l; i++)
newB[j++] = tagged1B[i];
newB[j++] = ')';
return string(newB);
}
}