SDL_ReadU32LE(3)

SDL_ReadU32LE 💖

okay bestie, so this one lives in the SDL3 FUNCTIONS section of the manual and it's genuinely so useful, like it's giving "I just need four bytes and I need them to make sense" energy. ✨

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✨ NAME ✨

SDL_ReadU32LE — use this function to read 32 bits of little-endian data from an SDL_IOStream and return it in native format. 🎀

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🌸 SYNOPSIS 🌸

#include <SDL3/SDL_iostream.h>

bool SDL_ReadU32LE(SDL_IOStream *src, Uint32 *value);

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🦋 DESCRIPTION 🦋

so the way this works is SDL byteswaps the data only if necessary, which means the data you get back will be in the native byte order. no cap. it's not out here doing extra work for fun, it only flips bytes when your machine actually needs it. 💅

and here's the part you gotta know: this function will return false when the data stream is completely read, and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. 🫶

but wait, there's a plot twist — if false is returned and the stream is not at EOF, then SDL_GetIOStatus() will return a different error value, and SDL_GetError() will offer a human-readable message. so basically: false can mean "we're done here, babe" OR "something went wrong," and the status + error are how you tell the difference. iykyk 😭

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👑 FUNCTION PARAMETERS 👑

• src — the stream from which to read data. that's your source, your vibes-provider, the thing you're pulling bytes out of. 🍓
• value — a pointer filled in with the data read. it gets the goods. 💖

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⭐ RETURN VALUE ⭐

Returns true on successful read, or false on failure. if it's a failure, call SDL_GetError() for more information. simple as. 🌈

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🔥 THREAD SAFETY 🔥

Do not use the same SDL_IOStream from two threads at once. like, at all. one stream, one thread, that's the rule, don't test it 🙈

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💀 AVAILABILITY 💀

This function is available since SDL 3.2.0. so if you're on something older, it's not gonna be there for you, bestie. 🧚

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fr fr, if you're reading little-endian stuff off disk or off the wire, this is the main character of your parsing code. obsessed. 💜

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Simple Directmedia Layer 🌸 SDL 3.4.18 🌸 SDL_ReadU32LE(3)

okay that's the whole page, mwah, go read some bytes responsibly 💅✨🎀