[hatari-devel] Character conversion for filenames in GEMDOS HD emulation

[Max Böhm <mboehm3@xxxxxxxxx>]

Hello developers,

The GEMDOS HD emulation is really cool and works very well. But currently,

if filenames contain special characters like 'ä', 'ö', 'ü', 'ß', they

are mapped to '@' on the host system and the characters are lost (this

happens for all codes above 128 of the AtariST character set) .

I have written support functions, which convert strings between the AtariST

character set and the Linux (utf-8) and Windows (cp1252) character sets.

extern void Str_AtariToUtf8(const char *source, char *dest);

extern void Str_Utf8ToAtari(const char *source, char *dest, char replacementChar);

extern void Str_AtariToWindows(const char *source, char *dest, char replacementChar);

extern void Str_WindowsToAtari(const char *source, char *dest, char replacementChar);

see https://gist.github.com/1052abb7c6d542f16037

All characters which exist in the target code are mapped correctly. If a 

character does not exist the replacementChar is inserted.

Here is a patch which integrates these functions into Hatari:

https://gist.github.com/a8b0ba0aa6d3bc8adab5

With this patch GEMDOS HD emulation will support all characters which

can be represented on the host system. The patch can be applied by:

patch -p1 --fuzz=3 <../hatari-1.7.0.gemdos.patch

It would be nice if someone who knows the gemdos.c and str.c code well,

could have a look and check if the integration has been done correctly.

Would also be nice if this can be integrated into of the Hatari sources.

Max