sw842_compress(9)

✨ sw842_compress(9) ✨

okay so we're deep in the Kernel API Manual today bestie, and this one is a little compression gremlin from the 842 corner of the kernel 💅 buckle up 🎀

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🌸 NAME 🌸

sw842_compress — and honestly? the original manpage leaves the description blank, so no cap, the name section is just the name. iconic minimalism, iykyk 🦋 (the DESCRIPTION below is where the actual tea is)

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💖 SYNOPSIS 💖

int sw842_compress (const u8 *in , unsigned int ilen , u8 *out ,
       unsigned int *olen , void *wmem );

like, she takes five things and returns an int. that's the whole vibe check 🔥

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🫶 ARGUMENTS 🫶

• in — "undescribed" 😭 bestie the docs literally say -- undescribed --. fr fr, the source is the only lore we get.
• ilen — also -- undescribed -- 🙈
• out — you guessed it: -- undescribed -- 💀
• olen — -- undescribed -- (but keep an eye on this one, she's important in RETURN 👀)
• wmem — -- undescribed -- ✨ (scroll to RETURN, she stays mysterious)

ngl, the manpage is out here giving nothing for these five. don't shoot the messenger 😭 the actual behaviour is spelled out in DESCRIPTION, so read on 💖

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🦋 DESCRIPTION 🦋

okay so here's the real deal 🌈 she compresses the uncompressed buffer of length ilen sitting at in, writing it into the output buffer out — and she promises to use no more than olen bytes to do it. the format is the 842 compression format 👑 that's the whole assignment, and she ate.

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🎀 RETURN 🎀

• returns 0 on success 🥳
• returns an error on failure 😭
• and the olen parameter — remember her from ARGUMENTS? — will contain the number of output bytes written on success, or 0 on error. so like, she's your little receipt 🧾 check her before you trust anything 💅

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⭐ SEE ALSO ⭐

• Kernel file ./lib/842/842_compress.c — the source, the lore, the whole origin story 📖 go read her 🫶

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and that's the whole page, bestie ✨ ./lib/842, October 2026, Kernel API Manual — sw842_compress(9) is a wrap 💜🧚‍♀️ mwah 🎀