> For the complete documentation index, see [llms.txt](https://developers.polymath.network/polymath/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.polymath.network/polymath/api/util.md).

# Utility contract for reusable code (Util.sol)

View Source: [contracts/libraries/Util.sol](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/contracts/libraries/Util.sol)

**Util**

## Functions

* [upper(string \_base)](/polymath/api/util.md#upper)
* [stringToBytes32(string \_source)](/polymath/api/util.md#stringtobytes32)
* [bytesToBytes32(bytes \_b, uint256 \_offset)](/polymath/api/util.md#bytestobytes32)
* [bytes32ToString(bytes32 \_source)](/polymath/api/util.md#bytes32tostring)
* [getSig(bytes \_data)](/polymath/api/util.md#getsig)

### upper

Changes a string to upper case

```javascript
function upper(string _base) internal pure
returns(string)
```

**Arguments**

| Name   | Type   | Description      |
| ------ | ------ | ---------------- |
| \_base | string | String to change |

### stringToBytes32

```javascript
function stringToBytes32(string _source) internal pure
returns(bytes32)
```

**Arguments**

| Name     | Type   | Description |
| -------- | ------ | ----------- |
| \_source | string |             |

### bytesToBytes32

```javascript
function bytesToBytes32(bytes _b, uint256 _offset) internal pure
returns(bytes32)
```

**Arguments**

| Name     | Type    | Description |
| -------- | ------- | ----------- |
| \_b      | bytes   |             |
| \_offset | uint256 |             |

### bytes32ToString

Changes the bytes32 into string

```javascript
function bytes32ToString(bytes32 _source) internal pure
returns(string)
```

**Arguments**

| Name     | Type    | Description                      |
| -------- | ------- | -------------------------------- |
| \_source | bytes32 | that need to convert into string |

### getSig

Gets function signature from \_data

```javascript
function getSig(bytes _data) internal pure
returns(sig bytes4)
```

**Returns**

bytes4 sig

**Arguments**

| Name   | Type  | Description |
| ------ | ----- | ----------- |
| \_data | bytes | Passed data |