load_datafile(3)

💖 load_datafile — the Allegro manual, but make it make sense 💖

okay bestie, so this one is from the Allegro manual — specifically section 3 — and it's literally the glow-up your game's resources deserve. load_datafile is the Allegro game programming library function that slurps a whole datafile into memory in one go. no cap. let's get into it. 🦋

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✨ SYNOPSIS ✨

#include <allegro.h>

DATAFILE *load_datafile(const char *filename);

like, that's it. one include, one call, one DATAFILE * coming your way. 🎀

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🌸 DESCRIPTION 🌸

so here's the tea: load_datafile loads a datafile into memory in one go. not piece by piece, not one asset at a time — the whole thing, at once, main character energy. 💅

but listen, there are two very important plot twists:

• If the datafile has been encrypted, you must first call packfile_password() to set the appropriate key. yes, first. do it before. don't be the person who forgets. 🔐
• If the datafile contains truecolor graphics, you must set the video mode or call set_color_conversion() before loading it. like, before. the order genuinely matters here, i'm not being dramatic. 🎨

and here's the example, straight from the source, no edits:

/* Load the resources for our game. */
DATAFILE *dat = load_datafile("game.dat");
if (!dat)
   abort_on_error("Couldn't load sound resources!");
/* Use resources. */
...
/* Destroy them when we don't need them any more. */
unload_datafile(dat);

see how it checks for !dat? that's the vibe check right there. load, use, unload. the full cycle. iconic. 🔥

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💫 RETURN VALUE 💫

it returns a pointer to the DATAFILE, or NULL on error. 🫶

and bestie, please — remember to free this DATAFILE later to avoid memory leaks. the unload_datafile(dat) in that example is not decoration, it's self-care. your RAM will thank you. 💀

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🌈 SEE ALSO 🌈

the whole friend group, obviously:

• load_datafile_callback(3)
• unload_datafile(3)
• load_datafile_object(3)
• set_color_conversion(3)
• fixup_datafile(3)
• packfile_password(3)
• find_datafile_object(3)
• register_datafile_object(3)
• excustom(3)
• exdata(3)
• exexedat(3)
• exgui(3)
• exsprite(3)
• exunicod(3)

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and that's the whole page, bestie. this one ships with Allegro version 4.4.3, and yeah, it's load_datafile(3) all the way down. go load something cute and remember to unload it after. mwah. 💖✨🎀