---
title: "CFConvertDoubleHostToSwapped(_:)"
framework: corefoundation
role: symbol
role_heading: Function
path: "corefoundation/cfconvertdoublehosttoswapped(_:)"
---

# CFConvertDoubleHostToSwapped(_:)

Converts a 64-bit double from the host’s native byte order to a platform-independent format.

## Declaration

```swift
func CFConvertDoubleHostToSwapped(_ arg: Double) -> CFSwappedFloat64
```

## Parameters

- `arg`: The real value to convert.

## Return Value

Return Value A structure holding the real value in a canonical byte order.

## See Also

### Core Foundation Byte Order Utilities Miscellaneous Functions

- [CFByteOrderGetCurrent()](corefoundation/cfbyteordergetcurrent().md)
- [CFConvertDoubleSwappedToHost(_:)](corefoundation/cfconvertdoubleswappedtohost(_:).md)
- [CFConvertFloat32HostToSwapped(_:)](corefoundation/cfconvertfloat32hosttoswapped(_:).md)
- [CFConvertFloat32SwappedToHost(_:)](corefoundation/cfconvertfloat32swappedtohost(_:).md)
- [CFConvertFloat64HostToSwapped(_:)](corefoundation/cfconvertfloat64hosttoswapped(_:).md)
- [CFConvertFloat64SwappedToHost(_:)](corefoundation/cfconvertfloat64swappedtohost(_:).md)
- [CFConvertFloatHostToSwapped(_:)](corefoundation/cfconvertfloathosttoswapped(_:).md)
- [CFConvertFloatSwappedToHost(_:)](corefoundation/cfconvertfloatswappedtohost(_:).md)
- [CFSwapInt16(_:)](corefoundation/cfswapint16(_:).md)
- [CFSwapInt16BigToHost(_:)](corefoundation/cfswapint16bigtohost(_:).md)
- [CFSwapInt16HostToBig(_:)](corefoundation/cfswapint16hosttobig(_:).md)
- [CFSwapInt16HostToLittle(_:)](corefoundation/cfswapint16hosttolittle(_:).md)
- [CFSwapInt16LittleToHost(_:)](corefoundation/cfswapint16littletohost(_:).md)
- [CFSwapInt32(_:)](corefoundation/cfswapint32(_:).md)
- [CFSwapInt32BigToHost(_:)](corefoundation/cfswapint32bigtohost(_:).md)