comedi_offset_munge(9)

💅 comedi_offset_munge(9) — the Kernel API Manual, but make it cute

okay so bestie, you're in the Kernel API Manual and today's main character is comedi_offset_munge ✨ (yes that's the page title, and yes the manual name is literally Kernel API Manual, we're fancy like that 🎀)

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✨ NAME ✨

comedi_offset_munge — Convert between offset binary and 2's complement 🦋

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🌸 SYNOPSIS 🌸

unsigned int comedi_offset_munge (struct comedi_subdevice *s , unsigned
int val );

literally that's the whole function signature, no notes 💅

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🎀 ARGUMENTS 🎀

• s — your COMEDI subdevice 👑 (yes, it's a struct comedi_subdevice *, she's the star of the show)
• val — the value to be converted 🍓 goes in as one thing, comes out as another, the glow-up is real

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💖 DESCRIPTION 💖

okay so what this icon does: she toggles the highest bit of a sample value 🔥 and by doing that she toggles between offset binary and 2's complement. that's it, that's the whole vibe. flip the top bit, switch the encoding, slay 💅

one lil caveat though bestie, no cap: she assumes that s->maxdata is a power of 2 minus 1 🫶. like that's the deal, that's the contract, don't come at her with anything else.

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🌈 RETURN 🌈

the converted value 💖 that's what you get back, the newly munged sample, iconic behaviour honestly ⭐

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🦋 SEE ALSO 🦋

the whole friend group, in order, because we don't do gatekeeping here 🙈:

• Kernel file ./include/linux/comedi/comedidev.h
• struct comedi_subdevice(9)
• struct comedi_buf_page(9)
• struct comedi_buf_map(9)
• struct comedi_async(9)
• enum comedi_cb(9)
• struct comedi_driver(9)
• struct comedi_device(9)
• struct comedi_lrange(9)
• comedi_range_is_bipolar(9)
• comedi_range_is_unipolar(9)
• comedi_range_is_external(9)
• comedi_chan_range_is_bipolar(9)
• comedi_chan_range_is_unipolar(9)
• comedi_chan_range_is_external(9)
• comedi_bytes_per_sample(9)
• comedi_sample_shift(9)
• comedi_bytes_to_samples(9)
• comedi_samples_to_bytes(9)
• comedi_check_trigger_src(9)
• comedi_check_trigger_is_unique(9)
• comedi_check_trigger_arg_is(9)
• comedi_check_trigger_arg_min(9)
• comedi_check_trigger_arg_max(9)
• comedi_buf_n_bytes_ready(9)
• __comedi_request_region(9)
• comedi_request_region(9)
• module_comedi_driver(9)

like, the whole squad 😭👑

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okay that's the page bestie, and before I go — the source path is ./include/linux/comedi and the date on this bad girl is October 2026 ⭐ so like, from the future, obviously 💅🫶 bye mwah 🎀