SDL_vasprintf(3)

💖 SDL_vasprintf — bestie edition 💖

okay so this is SDL_vasprintf, a lil function from the SDL3 functions crew (that's the manual it lives in, and yes it's a whole vibe). It does exactly what vasprintf() does, except it doesn't need access to a C runtime. no cap. that's the whole point. 🫶

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✨ SYNOPSIS ✨

#include <SDL3/SDL_stdinc.h>

int SDL_vasprintf(char **strp, const char *fmt, va_list ap);

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🌸 DESCRIPTION 🌸

It functions identically to SDL_asprintf(), with one lil twist: instead of taking ... variable arguments, it takes a va_list. that's it. that's the plot. 💅

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🎀 FUNCTION PARAMETERS 🎀

• strp — on output, this gets set to the new string. must NOT be NULL. do not test her like that. 🙈
• fmt — a printf-style format string. also must NOT be NULL. 🍓
• ap — a va_list of values to be used with the format string. it's giving "here's the receipts, format them". ✨

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⭐ RETURN VALUE ⭐

Returns the number of bytes in the newly-allocated string — and not counting the null-terminator char, bestie, don't forget that part — or a negative value on error. so if you get a negative number back, that's your vibe check failing. 😭

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🧚 THREAD SAFETY 🧚

It is safe to call this function from any thread. go off, multithreaded queen. 👑

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🌈 AVAILABILITY 🌈

This function is available since SDL 3.2.0. if you're on something older... babe. upgrade. 💜

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mwah 💖 that's the whole page. this one came to you courtesy of Simple Directmedia Layer, running SDL 3.4.18 — and yeah, SDL_vasprintf(3) is the page name, in case you needed to cite her. periodt. 🎀✨🦋