---
name: "SDL_strtoull"
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_strtoull"
---

# SDL\_strtoull(3)

Parse an unsignedlonglong from a string.

## NAME

SDL\_strtoull - Parse an **unsigned**long**long** from a string.

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

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

**unsigned long long SDL\_strtoull(const char \*str, char \*\*endp, int base);**

## DESCRIPTION

If **str** starts with whitespace, then those whitespace characters are skipped before attempting to parse the number.

If the parsed number does not fit inside an **unsigned**long**long** , the result is clamped to the maximum representable **unsigned**long**long** value.

## FUNCTION PARAMETERS

- *str*

  The null-terminated string to read. Must not be NULL.

- *endp*

  If not NULL, the address of the first invalid character (i.e. the next character after the parsed number) will be written to this pointer.

- *base*

  The base of the integer to read. Supported values are 0 and 2 to 36 inclusive. If 0, the base will be inferred from the number's prefix (0x for hexadecimal, 0 for octal, decimal otherwise).

## RETURN VALUE

Returns the parsed **unsigned**long**long** , or 0 if no number could be parsed.

## 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\_atoi**(3)](/SDL_atoi/3.md), **•**(3), [**SDL\_atof**(3)](/SDL_atof/3.md), **•**(3), [**SDL\_strtol**(3)](/SDL_strtol/3.md), **•**(3), [**SDL\_strtoll**(3)](/SDL_strtoll/3.md), **•**(3), [**SDL\_strtoul**(3)](/SDL_strtoul/3.md), **•**(3), [**SDL\_strtod**(3)](/SDL_strtod/3.md), **•**(3), [**SDL\_ulltoa**(3)](/SDL_ulltoa/3.md)