# libSceCesCs technical debt

### Silent stubs

- [sceCesMbcsUcsContextInit](../../../core/libs/prx/libSceCesCs/Export.cpp) (libSceCesCs) stores the profile pointer in the first 8 bytes of the caller's context; the console's context layout is not known. It returns the invalid-parameter error for a null context. The signature `int sceCesMbcsUcsContextInit(union* context, const union* mbcsUcsPrf)` follows the [Orbital IDA type database](https://github.com/AlexAltea/orbital/blob/master/tools/ida/db_types.json). `sceCesRefersUcsProfileCp1251` returns a profile accepted by `sceCesSbcToUtf8` and `sceCesUtf8ToSbc` only, with the Windows-1251 table of Microsoft's [bestfit1251.txt](https://unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/bestfit1251.txt), where byte 0x98 (unassigned) maps to U+0098 like the unassigned Cp1252 bytes; the console behavior for that byte is not verified
- [EUC-JP (CP51932) conversions](../../../core/libs/prx/libSceCesCs/Export.cpp) (libSceCesCs): `sceCesUcsProfileInitEucJpCp51932` marks the caller's sheet with an 8-byte tag and returns it as the profile. `sceCesUtf8StrToMbcsStr`, `sceCesUcs2StrToMbcsStr`, `sceCesMbcsStrToUtf8Str`, `sceCesMbcsStrToUcs2Str`, their `Get*Len` forms and `sceCesEucJpToUcs2` convert ASCII, the JIS X 0201 half-width katakana (`0x8E` + `0xA1`-`0xDF`, U+FF61-U+FF9F) and the two-byte rows `0xA1`-`0xFE` for that profile, and every character for the CP1252 and CP1251 profiles. The two-byte table ([JisX0208.hpp](../../../core/libs/prx/libSceCesCs/JisX0208.hpp), 7336 of 8836 cells) is Microsoft code page 932 read through the standard JIS row/cell to Shift-JIS arithmetic, so it includes NEC row 13 and the NEC-selected IBM rows 89-92 and maps the Microsoft variants (U+FF5E at `0xA1C1`, U+2225, U+FF0D, U+FFE0-U+FFE2) instead of JIS X 0208's; that the console's CP51932 table equals it is assumed from the Microsoft code page, not measured. A character with several cells encodes to the lowest cell. A well-formed but unassigned cell answers `UNASSIGNED_CODE`, a trail byte outside `0xA1`-`0xFE` `INVALID_ENCODE`, a cut pair `SRC_BUFFER_END`; the console's errors for these are not known. Three-byte JIS X 0212 (`0x8F`) characters convert through a second table ([JisX0212.hpp](../../../core/libs/prx/libSceCesCs/JisX0212.hpp), 6067 of 8836 cells) read from the Unicode consortium's [JIS0212.TXT](https://unicode.org/Public/MAPPINGS/OBSOLETE/EASTASIA/JIS/JIS0212.TXT); that the console's CP51932 table equals it is assumed from that mapping, not measured. A well-formed but unassigned three-byte cell answers `UNASSIGNED_CODE` and a cut triple `SRC_BUFFER_END`. A character with cells in both JIS X 0208 and JIS X 0212 encodes to the two-byte form, and one only in JIS X 0212 to the three-byte form. Signatures follow [orbital](https://github.com/AlexAltea/orbital/blob/master/tools/ida/db_types.json). The string forms stop at the source limit or at a zero code unit, which is neither converted nor counted, and write no terminator; `*Len` outputs count code units consumed and produced. A code point outside the BMP answers `UNASSIGNED_CODE`. Unverified on hardware.
- [sceCesUcsProfileInitSJis1997Cp932](../../../core/libs/prx/libSceCesCs/Export.cpp) (libSceCesCs) - returns the sheet argument without writing profile tables to it, and returns null for a null pointer; Shift-JIS conversion tables are unimplemented. The signature `union* sceCesUcsProfileInitSJis1997Cp932(SceCesUcsProfileSheet* sheet)` follows the [Orbital IDA type database](https://github.com/AlexAltea/orbital/blob/master/tools/ida/db_types.json)

### Unknown function info

- [sceCesRefersUcsProfileCp1250](../../../core/libs/prx/libSceCesCs/Export.cpp) (libSceCesCs) - returns a profile accepted by `sceCesSbcToUtf8`, `sceCesUtf8ToSbc` and the MBCS context conversions, with the Windows-1250 table of Microsoft's [bestfit1250.txt](https://unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/bestfit1250.txt), where the unassigned bytes map to their Latin-1 control characters as the Cp1252 and Cp1251 tables do; the console behavior for those bytes and the whole profile is not verified. PPSA34501 fails to start without this export (`qYu6y1E0Qbg`)