VistaIOWriteFile(3)

✨ VistaIOWriteFile(3) ✨

okay bestie, so this is a page from the Library Functions Manual, and it's all about VistaIOWriteFile — she's a libc-adjacent girlie from the vistaio world and she is literally the one who puts your data on disk. 🫶

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💖 NAME 💖

VistaIOWriteFile — write a Vista data file. that's it, that's the job, she writes the file. 💅

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🌸 SYNOPSIS 🌸

#include <stdio>
#include <vistaio.h>

VistaIOBoolean VistaIOWriteFile (file, list)
       FILE *file;
       VistaIOAttrList list;

like yes she takes two args, she's low maintenance, we love that for her. 🎀

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🦋 ARGUMENTS 🦋

• file — the open stream you want the data file written to. open it first, bestie, she's not gonna do that for you. 🙈
• list — the list of attributes that's getting written. this is the payload. the main character. 👑

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⭐ DESCRIPTION ⭐

so VistaIOWriteFile writes an attribute list as a Vista data file. that's the whole vibe.

attributes get written in the order they appear in the list — no shuffling, no rearranging, it's first-come-first-served fr fr. and the way that she writes them? she converts each attribute value from its internal form (like, say, a VistaIOImage data structure) into external form, following the conventions described over in VistaIOattribute(3) and VistaIOtype(3). so the internal-to-external glow-up is happening on the fly. ✨

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🔥 RETURN VALUE 🔥

if VistaIOWriteFile is successful, she returns TRUE. and when she says successful, she means fully successful — she will have written everything from the Vista data file header all the way down to the last byte of binary data. no half-finished situationships here. 💖

but if she hits an error? she returns FALSE, and ngl she might leave the file incomplete while doing it. 😭 it's giving "we tried."

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🌈 SEE ALSO 🌈

• VistaIOWriteImages(3)
• VistaIOWriteObjects(3)
• VistaIOWriteUbcIff(3)
• stdio(3)
• VistaIOtype(3)

go read these too, iykyk. 📚

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💜 NOTES 💜

data is written to the stream sequentially, which means the stream is allowed to be a pipe. that's the whole point, bestie — sequential means pipeable. 🫶

and no rewind is performed. not before writing, not after. zero rewinding. none. the tape stays where it is. 🎀

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💀 DIAGNOSTICS 💀

• `name attribute has unwriteable representation: repn.` — the named attribute has a value that cannot be converted to external form. a VistaIOPointer value, for example, has no external form. so like… she literally cannot write it down. there is no external form to write. 💀
• `Write to stream failed.` — a write to file failed because of an I/O error or a corrupt data structure. the stream said no. 🙈

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👑 AUTHOR 👑

Art Pope <pope@cs.ubc.ca>

Adaption to vistaio: Gert Wollny <gw.fossdev@gmail.com>

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and that's the whole page, bestie!! 🎀 this was VistaIO Version 1.2.14, dated 24 April 1993, and yes she's an icon, she's been serving since the nineties, periodt. 💅✨🌸