---
name: "SDL_wcstol"
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_wcstol"
---

# SDL\_wcstol(3)

Parse a long from a wide string.

## NAME

SDL\_wcstol - Parse a **long** from a wide string.

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

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

**long SDL\_wcstol(const wchar\_t \*str, wchar\_t \*\*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 a **long** , the result is clamped to the minimum and maximum representable **long** values.

## FUNCTION PARAMETERS

- *str*

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

- *endp*

  If not NULL, the address of the first invalid wide 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 **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\_strtol**(3)](/SDL_strtol/3.md)