---
name: "SDL_AddGamepadMappingsFromIO"
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_AddGamepadMappingsFromIO"
---

# SDL\_AddGamepadMappingsFromIO(3)

Load a set of gamepad mappings from an SDL\_IOStream .

## NAME

SDL\_AddGamepadMappingsFromIO - Load a set of gamepad mappings from an  **SDL\_IOStream** .

## HEADER FILE

Defined in SDL3/SDL\_gamepad.h

## SYNOPSIS

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

**int SDL\_AddGamepadMappingsFromIO(SDL\_IOStream \*src, bool closeio);**

## DESCRIPTION

You can call this function several times, if needed, to load different database files.

If a new mapping is loaded for an already known gamepad GUID, the later version will overwrite the one currently loaded.

Any new mappings for already plugged in controllers will generate

**SDL\_EVENT\_GAMEPAD\_ADDED**\
  events.

Mappings not belonging to the current platform or with no platform field specified will be ignored (i.e. mappings for Linux will be ignored in Windows, etc).

This function will load the text database entirely in memory before processing it, so take this into consideration if you are in a memory constrained environment.

## FUNCTION PARAMETERS

- *src*

  the data stream for the mappings to be added.

- *closeio*

  if true, calls  **SDL\_CloseIO** () on **src** before returning, even in the case of an error.

## RETURN VALUE

Returns the number of mappings added or -1 on failure; call

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

## THREAD SAFETY

It is safe to call this function from any thread.

## AVAILABILITY

This function is available since SDL 3.2.0.

## SEE ALSO

**•**(3), [**SDL\_AddGamepadMapping**(3)](/SDL_AddGamepadMapping/3.md), **•**(3), [**SDL\_AddGamepadMappingsFromFile**(3)](/SDL_AddGamepadMappingsFromFile/3.md), **•**(3), [**SDL\_GetGamepadMapping**(3)](/SDL_GetGamepadMapping/3.md), **•**(3), [**SDL\_GetGamepadMappingForGUID**(3)](/SDL_GetGamepadMappingForGUID/3.md), **•**(3), [**SDL\_HINT\_GAMECONTROLLERCONFIG**(3)](/SDL_HINT_GAMECONTROLLERCONFIG/3.md), **•**(3), [**SDL\_HINT\_GAMECONTROLLERCONFIG\_FILE**(3)](/SDL_HINT_GAMECONTROLLERCONFIG_FILE/3.md), **•**(3), **SDL\_EVENT\_GAMEPAD\_ADDED**(3)