SDL_scalbn(3)

💖 SDL_scalbn — the glow-up button for your doubles 💖

okay bestie, so this is a page from the SDL3 FUNCTIONS manual, and today's main character is SDL_scalbn. She scales your number by a power of two. That's it. That's the whole job. And she does it flawlessly. ✨

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✨ NAME ✨

SDL_scalbn — scale x by an integer power of two. lowkey the simplest slay in the whole math library 🫶

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🌸 SYNOPSIS 🌸

#include <SDL3/SDL_stdinc.h>

double SDL_scalbn(double x, int n);

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🦋 DESCRIPTION 🦋

So here's the vibe: it multiplies x by the *n*th power of the floating point radix — and the radix is always 2, no cap, every single time. 💅

The domain situation:

• Domain: -INF <= x <= INF,
• n integer

The range situation:

• Range: -INF <= y <= INF

Important tea: this function operates on double-precision floating point values. If you're rocking single-precision floats, go hold hands with SDL_scalbnf instead, she's literally right there. 🎀

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🎀 FUNCTION PARAMETERS 🎀

• x — floating point value to be scaled.
• n — integer exponent.

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⭐ RETURN VALUE ⭐

Returns x * 2^n. That's the whole answer. Beautiful. Iconic. No notes. 😭💖

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🌈 THREAD SAFETY 🌈

It is safe to call this function from any thread. Any thread. All the threads. The threads are eating good tonight. 🧚

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👑 AVAILABILITY 👑

This function is available since SDL 3.2.0. So if you're on something older... bestie. Time to update. 🙈

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💜 SEE ALSO 💜

• SDL_scalbnf(3)
• SDL_pow(3)

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and that's the page, bestie!! this one came to you straight from the Simple Directmedia Layer girlies, version SDL 3.4.18 — and yeah, this manual page is literally named SDL_scalbn(3) too, we're keeping it consistent around here. go forth and scale responsibly 💅✨🫶