SDL_SwapFloatBE(3)

💖 SDL_SwapFloatBE — bestie edition 💖

okay so this is a page from the SDL3 FUNCTIONS collection, and today's main character is SDL_SwapFloatBE(3). she's a macro. she's tiny. she's iconic. let's get into it 🫶

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✨ NAME ✨

SDL_SwapFloatBE — swap a floating point value from bigendian to native byte order. literally just a glow-up for your endianness 💅

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🌸 SYNOPSIS 🌸

#include <SDL3/SDL_endian.h>

#define SDL_SwapFloatBE(x) SwapOnlyIfNecessary(x)

that's it. that's the whole girl. no cap 🎀

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🦋 DESCRIPTION 🦋

so here's the vibe check: if this is running on a bigendian system, x is returned unchanged. like, no notes, no edits, she's already perfect on that machine ✨

and the part that's genuinely lowkey amazing: this macro never references x more than once, which avoids side effects. so you can pass in something with a side effect and she won't go and do it twice behind your back. she's respectful like that 🙈

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🎀 MACRO PARAMETERS 🎀

• x — the value to swap, in bigendian byte order. that's the one and only argument bestie, she keeps it simple 👑

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⭐ RETURN VALUE ⭐

returns x in native byte order. so whatever endianness your machine is actually living in, that's what you get back 💜

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🌈 THREAD SAFETY 🌈

it is safe to call this macro from any thread. go wild. every thread can have a turn. no fighting, no drama, no race conditions on this one 🧚

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👑 AVAILABILITY 👑

this macro is available since SDL 3.2.0. if you're on anything older, sorry babe, she wasn't born yet 😭

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ngl if you got here looking for byte-order chaos and found a macro that mostly does nothing on bigendian machines — that's the joke, and it's a good one. periodt. 💅

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that's the whole page, bestie 💖 written up by Simple Directmedia Layer for SDL 3.4.18, dated like a lil time capsule — mwah, go swap something 🍓✨