explain_strtod_or_die(3)

💖 explain_strtod_or_die — Library Functions Manual 💖

okay bestie, sit down, we're talking about explain_strtod_or_die(3) from the Library Functions Manual and honestly? it's giving ✨ safety net ✨. it's the little function that converts a string to a number and, when things go wrong, actually tells you why instead of just ghosting you. no cap. 🦋

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✨ NAME ✨

explain_strtod_or_die — convert string to number and report errors 💅

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🌸 SYNOPSIS 🌸

#include <libexplain/strtod.h>
double explain_strtod_or_die(const char *nptr, char **endptr);
double explain_strtod_on_error(const char *nptr, char **endptr))

not me noticing there's a lil extra ) chillin' at the end of that second line 😭 that's literally how it's written, so it stays, periodt. copy it character for character bestie.

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🎀 DESCRIPTION 🎀

so the explain_strtod_or_die function is basically the group chat mom of the situation: it calls the strtod(3) system call for you. and if that call fails? it prints an explanation to stderr — which it gets from the explain_strtod(3) function — and then the process terminates by calling exit(EXIT_FAILURE). like, gone. bye. 💀

meanwhile, explain_strtod_on_error is the chiller sibling. it also calls the strtod(3) system call, and on failure it also prints an explanation to stderr obtained from explain_strtod(3)... but it still returns to the caller instead of ending it all. lowkey the emotionally mature one 🫶

🧚 the arguments 🧚

• nptr — the nptr, exactly as to be passed to the strtod(3) system call. yes bestie, literally exactly. no edits, no vibes-based modifications. 🙈
• endptr — the endptr, exactly as to be passed to the strtod(3) system call. same energy. exactly as-is. 💜

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🌈 RETURN VALUE 🌈

explain_strtod_or_die only returns on success — for more info, go look at strtod(3), she has the details. on failure it prints an explanation and exits, so it does not return. it's not coming back. it's on a different journey now. ✈️

explain_strtod_on_error always returns the value returned by the wrapped strtod(3) system call. always. every time. iconic consistency tbh 👑

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⭐ EXAMPLE ⭐

the explain_strtod_or_die function is intended to be used in a fashion similar to the following example:

double result = explain_strtod_or_die(nptr, endptr);

see that? one line. gorgeous. main character energy fr fr 💅✨

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👑 SEE ALSO 👑

• strtod(3) — convert ASCII string to floating‐point number 🍓
• explain_strtod(3) — explain strtod(3) errors 🔥
• exit(2) — terminate the calling process 💀

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💜 COPYRIGHT 💜

libexplain version 1.4 Copyright (C) 2009 Peter Miller

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and that's the whole page bestie, we ate and left absolutely no crumbs 🎀💖 okay so real talk, this was explain_strtod_or_die(3) from the Library Functions Manual, and just so you have the receipts: that's libexplain version 1.4, copyright 2009 Peter Miller — love that for us, go forth and convert strings responsibly, mwah 😭🦋🌸