---
name: "SDL_WriteS64LE"
section: "3"
platform: "linux"
package: "libsdl3-doc"
version: "3.2.10+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SDL_WriteS64LE"
---

# SDL\_WriteS64LE(3)

Use this function to write 64 bits in native format to an SDL\_IOStream as little-endian data.

## NAME

SDL\_WriteS64LE - Use this function to write 64 bits in native format to an  **SDL\_IOStream**\
  as little-endian data.

## HEADER FILE

Defined in SDL3/SDL\_iostream.h

## SYNOPSIS

```
#include "SDL3/SDL.h"
```

**bool SDL\_WriteS64LE(SDL\_IOStream \*dst, Sint64 value);**

## DESCRIPTION

SDL byteswaps the data only if necessary, so the application always specifies native format, and the data written will be in little-endian format.

## FUNCTION PARAMETERS

- *dst*

  the stream to which data will be written.

- *value*

  the data to be written, in native format.

## RETURN VALUE

Returns true on successful write or false on failure; call

**SDL\_GetError** () for more information.

## THREAD SAFETY

This function is not thread safe.

## AVAILABILITY

This function is available since SDL 3.2.0.