SDL_vsnprintf(3)

💖 SDL_vsnprintf 💖

okay bestie, so this one's from the SDL3 FUNCTIONS part of the SDL3 manual, and it's genuinely such a useful little gremlin. sit down, grab a boba, let's go 🧋✨

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✨ NAME ✨

SDL_vsnprintf — this works exactly like vsnprintf() but it doesn't need access to a C runtime. no cap. that's the whole vibe. 🦋

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🌸 SYNOPSIS 🌸

#include <SDL3/SDL_stdinc.h>

int SDL_vsnprintf(char *text, size_t maxlen, const char *fmt, va_list ap);

like look at her. four params. absolutely iconic. 💅

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💜 DESCRIPTION 💜

So basically it functions identically to SDL_snprintf(), with one (1) tiny little twist: instead of taking ... variable arguments like a normal person, it takes a va_list. that's it. that's the difference. she's the va_list edition. the way that she's literally the same girl but holding a different handbag 😭

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🎀 FUNCTION PARAMETERS 🎀

• text — the buffer you're writing the string into. Must not be NULL. fr fr, do not do that to her. 🙈
• maxlen — the maximum bytes to write, including the null-terminator. yes including. count it. ⭐
• fmt — a printf-style format string. Must not be NULL either. bestie please. 💀
• ap — a va_list values to be used with the format string. that's the whole point of her existence, she's built for this. 🫶

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🔥 RETURN VALUE 🔥

Returns the number of bytes that should be written, not counting the null-terminator char. Or, if things go sideways, a negative value on error. so like... check your returns. always. 👑

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🌈 THREAD SAFETY 🌈

It is safe to call this function from any thread. she's unbothered. she's secure. she's giving main character energy across every thread you throw at her. 💖✨

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⭐ AVAILABILITY ⭐

This function is available since SDL 3.2.0. so if you're on anything older... girl. upgrade. 🎀

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lowkey reminder: text and fmt both Must Not Be NULL. the manpage says it, I'm saying it, the universe is saying it. iykyk. 🦋

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okay that's the whole page, mwah 💋 this was brought to you by Simple Directmedia Layer, SDL 3.4.18, and the SDL_vsnprintf(3) girlies — slay, stay formatted, and always null-terminate 🫶💅🌸