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How to convert utf-8 to (strcmp type)? [message #30900]

Fri, 28 January 2011 02:24

JoseB
Messages: 37
Registered: March 2009

Member

Hello
How can i convert utf-8 String variable in order to pass it to the strcmp() C++ function?

Thank you

JoseB

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Re: How to convert utf-8 to (strcmp type)? [message #30904 is a reply to message #30900]

Fri, 28 January 2011 08:35

koldo
Messages: 3461
Registered: August 2008

Senior Veteran

JoseB wrote on Fri, 28 January 2011 02:24

Hello
How can i convert utf-8 String variable in order to pass it to the strcmp() C++ function?

Thank you

JoseB

Hello JoseB

Could you indicate more details?.

Best regards
Iñaki

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Re: How to convert utf-8 to (strcmp type)? [message #30906 is a reply to message #30904]

Fri, 28 January 2011 10:16

JoseB
Messages: 37
Registered: March 2009

Member

Basically I have a upp GUI app and a command line program which is called from that upp application. I want to pass it an argument with is a string or better a char * array. Internally this char * array will be used by strcmp.

JoseB

[Updated on: Fri, 28 January 2011 10:17]

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Re: How to convert utf-8 to (strcmp type)? [message #30909 is a reply to message #30906]

Fri, 28 January 2011 10:22

cbpporter
Messages: 1428
Registered: September 2007

Ultimate Contributor

Do you want to convert it to a legacy encoding? strcmp will work for equality test with utf-8, but not with comparison.

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Re: How to convert utf-8 to (strcmp type)? [message #30941 is a reply to message #30909]

Fri, 28 January 2011 23:41

koldo
Messages: 3461
Registered: August 2008

Senior Veteran

Hello JoseB

I do not understand well the question but, if you require to pass a String to an API function you would have to do a ToSystemCharset().

For example, in Functions4U/FUnctios4U.cpp ReadOnly() function:

- In Windows, GetFileAttributesW() and SetFileAttributesW() require a ToSystemCharsetW().

- In POSIX, stat() and chmod() require a ToSystemCharset().

Best regards
Iñaki

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Re: How to convert utf-8 to (strcmp type)? [message #30963 is a reply to message #30909]

Sun, 30 January 2011 12:49

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

cbpporter wrote on Fri, 28 January 2011 04:22

Do you want to convert it to a legacy encoding? strcmp will work for equality test with utf-8, but not with comparison.

Actually, it will work for comparison as well, only the results might not be what you have expected...

Anyway, the same is true for 'legacy encoding'. The correct comparison depends on language rules; you ought to use LanguageInfo::Compare to get correct results, but it is now implemented only for Czech language and even that is not a full implementation of rules...

(That said, there is some default implementation in int DefaultLanguageCompare that would probably work reasonably well for most Latin based languages).

Mirek

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