Re: g_utf8_offset_to_pointer benchmark

[David Turner <dturner soremo com>]

Not surprisingly, Bedhad's code, just like Hans' ignores alignment 
constraints
on non-intel processors.Fixing this is possible with more test cases.

Anyway, I still think that his conclusion is valid, i.e. keep the 
current glib code
intact, and fix the users instead.

Regards,

- David Turner
- The FreeType Project  (www.freetype.org)

Morten Welinder a écrit :

> ...
>
> int
> main ()
> {
>  (void)behdad_utf8_offset_to_pointer ("xxxxxxxxxx" + 1, 5);
>  return 0;
> }
>
>
>
> troll:~> gcc -g -Wall -O2 behdad.c
> behdad.c: In function `behdad_utf8_offset_to_pointer':
> behdad.c:35: warning: return discards qualifiers from pointer target type
> troll:~> ./a.out
> Bus Error (core dumped)
> troll:~> gdb a.out core
> GNU gdb 4.17
> Copyright 1998 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "sparc-sun-solaris2.6"...
> Core was generated by `./a.out'.
> Program terminated with signal 10, Bus Error.
> Reading symbols from /usr/lib/libc.so.1...done.
> Reading symbols from /usr/lib/libdl.so.1...done.
> Reading symbols from /usr/platform/SUNW,Sun-Fire/lib/libc_psr.so.1...done.
> #0  behdad_utf8_offset_to_pointer (str=0x10669 "xxxxxxxxx", offset=5)
> at behdad.c:19
> 19          register WORDTYPE w = *ws++;
> _______________________________________________
> Performance-list mailing list
> Performance-list gnome org
> http://mail.gnome.org/mailman/listinfo/performance-list
>