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JJenkxandClaude Opus 5.5
ea6aa0a809
The fgetws in the libc.prx that titles ship (the same 133 bytes in the copies of PPSA13934, PPSA07923 and PPSA05916, read from disassembly) differs from this one in two cases: - A size below 2 returns null at once, without writing the buffer, errno or the stream (cmp $0x2,%esi; jge, else the null result). Here a size of 1 stored a NUL and returned the buffer, and a size of 0 or less set the stream error and errno 22. - When fgetwc returns -1 after characters were stored, the console null-terminates and returns the buffer; it returns null only when nothing was stored, and never checks ferror. Here a read error after some characters returned null. The rest already matches: each fgetwc result is stored as its low 16 bits (mov %ax,(%rbx)), and the newline test compares all 32 bits. A null buffer or stream, which the console dereferences, keeps failing with errno 22. guest_standard_streams now expects the console results for sizes 1, 0 and -1 and for an invalid byte after a stored character; its fgetwc error indicator check is unchanged. The libc debt entry cites the reading and what it leaves unverified. Co-Authored-By: Claude Opus 5.5 <[email protected]>