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Add --format json to structpad layout - #3
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Requested by gulliby
Before
structpad layoutprinted only a text table, so a script that wanted offsets, sizes or padding had to parse it.After
structpad layout --format json(or--format=json) prints the same structs as one JSON array (two-space indent, LF, UTF-8) withname,size,align,padding,packed,fieldsandgaps.--format textis the default. Onlylayouttakes the option;suggestandcheckrefuse it, and invalid or missing values exit 2.The full output for
struct Pair { u8 a; u32 b; }is in the README.How
src/structpad/render.py: newrender_layout_json.src/structpad/cli.py: the--formatoption and the usage line.tests/test_format_json.py: 14 new tests;tests/test_cli.py: the usage constant only.README.md: the new option documented.145 tests pass (131 before) and ruff is clean.