code page problem

[powerpcer]

when a file it detected "ANSI" and i input chinese into it. then it shows normally,
but if i type save and reopen the file, all chinese i inputed disappear?
what's wrong?

[Alexey]

"ANSI" is not a codepage, it is alias for european codepage (seems 125x or 437). CJK ANSI codepages not used for alias.

[powerpcer]

so why CP950 detect to european?
and for default, no matter what you assume it was, when saving, at least hint user for missing codepage setting, not just silence saved and lost.

[kvichans]

when saving, at least hint user for missing codepage setting, not just silence saved and lost.

Agree. If content conflicts with codepage need to ask before saving. E.g. "Cannot save the file with current CP - Latin1. Change CP? Cancel?"

IMHO: The "conflict" condition:
- CP has 256 characters (Latin, ANSI, CP12*, ...)
- In text there are characters from more then one 256-pages

[powerpcer]

from my point, editor just care about what user's input, and save it, code page is just for presentation.
for code page, i think only 4 type ansi, utf-8, ucs2, ucs4
ansi for all tradition code page, include DBCS, no need to convert, just save what they input. just presentation problem
UTF-8 to ansi/UCS2/UCS4 need convert for saving.