re all,
sorry for crossposting but:
i'm banging my head on an IGNOMINIOUS problem:
marshalling of numerical parameters into strings.
i used scanf/sprintf and i found a flexible and simple solution:
the parameter declarations can also include directly default min and max
as in
http://livido.dyne.org/trac.cgi/file/trunk/livido/plugin_example.c
the "zahira" parameter is declared in a _very_ simple way
and then in
http://livido.dyne.org/trac.cgi/file/trunk/livido/host_example.c
the get/set_parameter with va_list args is also very elegant
BUT then Andraz Tori pointed me that there is a problem in the
localisation of the radix character (decimal point)
it is HORRIBLE!
- -------------------------------------------
#include <locale.h>
#define PACKAGE "test"
#define LOCALEDIR "/usr/share/locale"
int main()
{
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
setlocale (LC_ALL, "");
char a[1000] = "1.234";
float f;
sscanf(a, "%f", &f);
printf("read: %s -> %f\n", a, f);
}
- -------------------------------------------
and here's where the fun begins:
$ export LANG=C
$ ./test
read: 1.234 -> 1.234000
$ export LANG=sl_SI
$ ./test
read: 1.234 -> 1,000000
i'm very disappointed at the libc at the moment!!!!!!!!!!!!!!!
i go to see the manual of printf(3) and i read:
For some numeric conversions a radix character (`decimal point') or thousands'
grouping character is used. The actual character used depends on the
LC_NUMERIC part of the locale. The POSIX locale uses `.' as radix character,
and does not have a grouping character. Thus,
printf("%'.2f", 1234567.89);
results in `1234567.89' in the POSIX locale, in `1234567,89' in the nl_NL
locale, and in `1.234.567,89' in the da_DK locale.
========================================\ O
========================================= /^ ( AAAAAAAAAAAAAAAAAAA )
========================================/ O
- --
jaromil, dyne.org rasta coder,
http://rastasoft.org
