Date: Thu, 18 Dec 1997 12:26:09 +0100 From: "Jose M. Alcaide" <jose@we.lc.ehu.es> To: freebsd-questions@FreeBSD.ORG Subject: should isprint(3) be affected by locale settings ? Message-ID: <34990851.5D20F3AD@we.lc.ehu.es>
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Hi,
I would like to know if the locale setting should affect the
behavior of isprint(3). I'm very confused about this.
The setlocale(3) manpage says:
...
LC_CTYPE Set a locale for the ctype(3), mbrune(3), multibyte(3) and
rune(3) functions. This controls recognition of upper and
lower case, alphabetic or non-alphabetic characters, and so
on. The real work is done by the setrunelocale() function.
...
>From this we might follow that the locale setting affects
isprint(). However, nothing in the ctype(3) or isprint(3) manual
pages does any reference to the locale.
I have written a tiny program that tests isprint() after calling
setlocale():
-------------------------
#include <stdio.h>
#include <ctype.h>
#include <locale.h>
main()
{
char c, *s;
printf("Old locale: %s\n", setlocale(LC_CTYPE, NULL));
if ((s = setlocale(LC_CTYPE, "")) == NULL)
{
fprintf(stderr, "setlocale() failed.\n");
exit(1);
}
else
printf("New locale: %s\n", s);
printf("Type any string ended by RETURN: ");
while ((c = getchar()) != '\n')
printf("%c: %s\n", c, isprint(c) ? "PRINTABLE" : "UNPRINTABLE");
exit(0);
}
-------------------------
The execution of this program yields the following results:
jose@tiburon[~]$ ./locale
Old locale: C
New locale: es_ES.ISO_8859-1
Type any string ended by RETURN: aeiouáéíóú
a: PRINTABLE
e: PRINTABLE
i: PRINTABLE
o: PRINTABLE
u: PRINTABLE
á: UNPRINTABLE
é: UNPRINTABLE
í: UNPRINTABLE
ó: UNPRINTABLE
ú: UNPRINTABLE
The accented vocals are legal ISO-8859-1 characters, but isprint() says
that they are unprintable, even after setting the locale. My question is:
is this the normal behavior of isprint()?
Thanks,
--JM
-----------------------------------------------------------------------
Jose M. Alcaide | mailto:jose@we.lc.ehu.es
Universidad del Pais Vasco | http://www.we.lc.ehu.es/~jose
Dpto. de Electricidad y Electronica |
Facultad de Ciencias - Campus de Lejona | Tel.: +34-4-4647700 x2624
48940 Lejona (Vizcaya) - SPAIN | Fax: +34-4-4858139
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