SDL_crc32(3)

✨ SDL_crc32 — the CRC-32 girly 💅

okay bestie, welcome to the SDL_crc32(3) page, straight out of the SDL3 FUNCTIONS lineup. buckle up, we're checksumming 🎀

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🌸 NAME 🌸

SDL_crc32 — Calculate a CRC-32 value. periodt.

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🦋 SYNOPSIS 🦋

#include <SDL3/SDL_stdinc.h>

Uint32 SDL_crc32(Uint32 crc, const void *data, size_t len);

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💖 DESCRIPTION 💖

so, the vibe here is cyclic redundancy checks. if you want the full lore, it's literally right here:

https://en.wikipedia.org/wiki/Cyclic_redundancy_check

now the actual tea: you can call this function multiple times to stream data that you wanna checksum in blocks. every call has to hand over the previous CRC-32 return value so it can be updated with the next block. and the first call for a set of blocks? you pass in a zero CRC value. that's the starting gun, no cap 🏁

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🎀 FUNCTION PARAMETERS 🎀

• crc — the current checksum for this data set, or 0 if it's a brand new data set. main character energy: it's either the glow-up-so-far or a fresh start 💫
• data — a new block of data to add to the checksum. just dropping it in the mix 🫶
• len — the size, in bytes, of that new block of data. it's giving "how big tho" 📏

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🌈 RETURN VALUE 🌈

Returns a CRC-32 checksum value of all the blocks in the data set. every single one, accounted for 👑

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💜 THREAD SAFETY 💜

It is safe to call this function from any thread. slay, no locking drama, no fighting over the aux 🔥

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⭐ AVAILABILITY ⭐

This function is available since SDL 3.2.0. so if you're on anything older, bestie, it's not happening 😭

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that's the whole page, you ate it 🍓

Simple Directmedia Layer made this, it's from SDL 3.4.18, and this lil writeup is dated SDL_crc32(3) — mwah, take care of her 💖✨