Re: ASCII & UTF string manipulation functions

[James Henstridge <james daa com au>]

Sandip V Honde wrote:

> Hi,
>
> I was replacing some of the deprecated string manipulation function
> calls.
> I found that such string manipulation calls can be replaced by functions 
> from ASCII or Unicode characters familiy 
>
> e.g.
>
> Following  functions are depreacted from <glib.h>
>
> 	g_strcasecmp()
> 	g_strncasecmp()
>
> The following replacements are avialable for above functions
>
> 	g_ascii_strcasecmp()
> 	g_ascii_strncasecmp()
>
> These functions only recognizes standard ASCII letters and ignores the
> locale, treating all non-ASCII
> characters as if they are not letters.
>
> Should I go for the functions from Unicode Manipuations which operate on
> Unicode characters and UTF-8 strings instead functions working only on
> ASCII characters ?
The functions were renamed to indicate that they work on 8 bit 
characters (ie. they won't handle utf8 multibyte encodings).  For 
localised utf8 strings, you should use the following two functions:

gint   g_utf8_collate     (const gchar *str1,
                          const gchar *str2);
gchar *g_utf8_collate_key (const gchar *str,
                          gssize       len);

The first is the unicode equivalent of strcoll() (which is what should 
be used for sorting localised strings).  If you are comparing a large 
number of strings, you can call g_utf8_collate_key() on each string, 
then simply use strcmp() to sort the keys.

James.

--
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