umult32(3)

✨ NAME ✨

umult32 — integer multiplication with overflow checking 💖

okay so bestie, this is the safe multiply girlie. she multiplies two unsigned 32-bit numbers and tells you if it went sideways instead of just silently lying to your face. no cap, that's the whole vibe.

🎀 SYNTAX 🎀

#include <libowfat/safemult.h>

int umult32(uint32 a,uint32 b,uint32* c);

yes you do need that include, don't skip it, the compiler will absolutely humble you 🌸

💅 DESCRIPTION 💅

so here's the tea, bestie. umult32 does

c = a*b

and returns 1. that's it. that's the girl. she ate. ✨

but — and this is the important part, the part where she becomes your main character — if there's an integer overflow, she does not touch c at all. she leaves it exactly the way she found it, and returns 0. 🫶

so if you get a 0 back, your c is untouched and your math was a lie. respect the return value or perish 🙈

like, c stays alone on overflow. untouched. unbothered. not a single byte changed. she's just telling you "bestie this did not fit, i'm not doing it." 💀

🔥 SEE ALSO 🔥

• umult16(3)
• imult32(3)
• umult64(3)

the whole safemult friend group, they all serve 🦋

k bye ily, this was the <code>umult32(3)</code> page from the Library Functions Manual — stay safe out there and always check your return values 💜