PLANARG(1)

🌸 PLANARG — the planarg manual page, bestie edition 💅

okay so you've found planarg, aka the User Commands girlie from planarg 2.9.3. she's giving very much "let me tell you if your graph is planar or not" energy and honestly? we're obsessed. ✨

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✨ SYNOPSIS ✨

planarg [-v] [-nVq] [-p|-u] [infile [outfile]]

like yes, that's the whole vibe. infile and outfile are optional, the flags are optional, she's lowkey chill like that. 🫶

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💖 DESCRIPTION 💖

For each input, write to output if planar. that's the whole job, no cap. 🎀

And here's the little detail that actually matters: the output file has a header if and only if the input file does. so if your input came in with a header, output leaves with a header. if it didn't, it doesn't. fr fr, it's a matching situation. 🦋

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🧚 the flags, one by one 🧚

• -v — write the non-planar graphs instead of the planar ones. yes bestie, she's flipping the whole thing on purpose. 💀
• -V — write a report on every input. every single one. she's thorough, she's a main character. 👑
• -u — don't write anything at all, just count. silent but observant. 🌸
• -p — write in planar_code if it's planar. (without -p, it's the same format as the input, okay?) 🌈
• -P — like -p, but big-endian. and heads up, it's the same thing for <= 255 vertices. 😌
• -k — follow each non-planar output with an obstruction in sparse6 format. she implies -v, and she is incompatible with -p. so don't try it, bestie. 🚫
• -n — suppress checking of the result. no vibe check on the output. 🙈
• -q — suppress auxiliary information. she's quiet, she's mysterious. 💜

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💡 little note from her: this program permits multiple edges and loops. iconic behaviour honestly. 🍓

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and that's the whole page, periodt. 🎀 this lil masterpiece is planarg 2.9.3, dated September 2026 — so yeah, she's current, she's fresh, she ate. 💅✨🦋