isspace() & i18n

egor duda
Wed May 30 07:12:00 GMT 2001


Wednesday, 30 May, 2001 Christopher Faylor wrote:

CF> On Wed, May 30, 2001 at 02:57:56PM +0400, egor duda wrote:

>>  cygwin calls newlib's isspace() passing it a signed char. this works
>>ok for ascii symbols 0x00-0x7f, but fails with, say, cyrillic symbols
>> with codes > 0x80. As a result `cd dir-with-last-cyrillic-letter'
>>fails as chdir strips last symbols, thinking they're spaces --
>>isspace() is called with negative parameter.
>>Any thoughts as of how we should handle this?

CF> Maybe we just need a cygwin_isspace which checks for just tabs and spaces?

it's possible, of course, but the problem with referencing negative
array indices in is*() remains.

i think we should either conform to standard and explicitly convert
types or define appropriate strings as unsigned char*, (typedef PATH_STR,
perhaps), or define cygwin_is*() as macros that do the conversion, or,
as glibc does, expand _ctype to allow indices in range [-128,256].

Egor.   ICQ 5165414 FidoNet 2:5020/496.19

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