SDL_ReadU32BE(3)

💖 SDL_ReadU32BE 💖

okay bestie, welcome to the SDL3 FUNCTIONS section of the manual, where we're talking about SDL_ReadU32BE(3) — the girlies' favourite way to slurp 32 bits of big-endian data out of an SDL_IOStream and hand it back to you in native format. ✨

---

🌸 NAME 🌸

SDL_ReadU32BE — use this function to read 32 bits of big-endian data from an SDL_IOStream and return in native format. no cap, that's literally the whole job. 🫶

---

✨ SYNOPSIS ✨

#include <SDL3/SDL_iostream.h>

bool SDL_ReadU32BE(SDL_IOStream *src, Uint32 *value);

---

🦋 DESCRIPTION 🦋

SDL byteswaps the data only if necessary, so the data returned will be in the native byte order. so like, it's not doing extra work for no reason — it's giving considerate. 💅

This function will return false when the data stream is completely read, and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned and the stream is not at EOF, SDL_GetIOStatus() will return a different error value and SDL_GetError() will offer a human-readable message. so like, false can mean two very different things and you gotta check which one it is. 🙈

⚠️ lowkey important: false on its own does not tell you "the stream ended". it might be EOF, it might be a real error. the status function is the one who knows. 👑

---

🎀 FUNCTION PARAMETERS 🎀

• src — the stream from which to read data. 🌊
• value — a pointer filled in with the data read. 🍓

---

🌈 RETURN VALUE 🌈

Returns true on successful read or false on failure; call SDL_GetError() for more information. that's it, that's the whole vibe check. ✅

---

💜 THREAD SAFETY 💜

Do not use the same SDL_IOStream from two threads at once. fr fr, do not do it. one stream, one thread, that's the rule. ✋

---

⭐ AVAILABILITY ⭐

This function is available since SDL 3.2.0. 🎉

---

and that's the tea, bestie! 💖 this page came to you courtesy of Simple Directmedia Layer, sitting pretty at SDL 3.4.18, dated SDL_ReadU32BE(3) — so go forth, read those bytes, and stay slay. 💅✨🎀