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Dean Galvin
bc87535cb0
Debt entries name the titles they were measured on. Use the title ID, or "a retail title" where the sentence needs no identification. No technical content changes.
10 lines
1.4 KiB
Markdown
10 lines
1.4 KiB
Markdown
# libSceConvertKeycode technical debt
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### Unknown function info
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- [sceConvertKeycodeGetCharacter](../../../core/libs/prx/libSceConvertKeycode/Export.cpp) (libSceConvertKeycode) - the signature `(uint16_t keycode, uint32_t, uint32_t keyboardType, char16_t* character)` is inferred from PPSA12361, which passes a 16-bit keycode, 0, the type from `sceConvertKeycodeGetImeKeyboardType` and a pointer it reads one UTF-16 unit from when the result is 0. The meaning of the second argument is unknown. PPSA02530 (#5726) and PPSA27836 pass `0x4000000` as a constant: PPSA27836 calls it for every keycode from 0 to 0x8F to build a table of key names, upper-cases `a` to `z` itself and skips keycodes that fail or return 0, so that bit is ignored and the unshifted character is returned as for 0. Any other bit throws, and so does a keyboard type other than 0. The returned character for HID usage `0x64` has not been measured on a console; `\` is an unverified US-layout guess based on the Windows VK mapping, which does not establish the console result.
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### Functional
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- [sceConvertKeycodeGetCharacter](../../../core/libs/prx/libSceConvertKeycode/Export.cpp) (libSceConvertKeycode) takes the keycode as a USB HID keyboard usage and returns the unshifted character of the US layout for letters, digits, punctuation, space and the keypad. A keycode without a character returns 0 with the character 0; whether the console returns an error instead is not measured.
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