Date: Mon, 14 Jul 1997 12:14:09 -0700 (PDT) From: "Jonathan M. Bresler" <jmb> To: wollman@khavrinen.lcs.mit.edu (Garrett Wollman) Cc: jmb@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG Subject: Re: ispunct(3) [was: FreeBSD-2.1.1] Message-ID: <199707141914.MAA08634@hub.freebsd.org> In-Reply-To: <199707141651.MAA07262@khavrinen.lcs.mit.edu> from "Garrett Wollman" at Jul 14, 97 12:51:26 pm
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Garrett,
i am sure that you are correct, but i would prefer more portable code.
UCHAR_MIN seems to be in short supply. (UCHAR_MAX might be too).
isascii() is everywhere.
i need to buy a copy of greg lehey's book.
kryten: {46} uname -a
FreeBSD kryten.yyy.zzz 2.2-STABLE FreeBSD 2.2-STABLE #0: Wed Jun 25 16:53:36 EDT 1997 jmb@kryten.yyy.zzz:/usr/src/sys/compile/KRYTEN i386
kryten: {47} which cc
/usr/bin/cc
kryten: {48} cc --version
2.7.2.1
kryten: {49} cc /tmp/a.c
/tmp/a.c: In function `main':
/tmp/a.c:10: `UCHAR_MIN' undeclared (first use this function)
/tmp/a.c:10: (Each undeclared identifier is reported only once
/tmp/a.c:10: for each function it appears in.)
kryten: {55} grep UCHAR /usr/include/* /usr/include/machine/*
/usr/include/machine/limits.h:#define UCHAR_MAX 255 /* max value for an unsigned char */
arcue1(14)% uname -a
SunOS arcue1 5.5.1 Generic_103640-08 sun4u sparc SUNW,Ultra-Enterprise
arcue1(15)% which cc
/opt/SUNWspro/bin/cc
arcue1(16)% cc -V
cc: SC4.0 18 Oct 1995 C 4.0
usage: cc [ options] files. Use 'cc -flags' for details
arcue1(17)% cc /tmp/a.c
"/tmp/a.c", line 10: undefined symbol: UCHAR_MIN
cc: acomp failed for /tmp/a.c
xxx: {30} % uname -a
BSD/OS xxx.yyy.zzz 2.1 BSDI BSD/OS 2.1 Kernel #1: Thu Jan 9 05:02:29 EST 1997 root@xxx.yyy.zzz:/usr/src/sys/compile/DIGI i386
xxx: {31} % which cc
/usr/bin/cc
xxx: {32} % cc -v
gcc version 1.42
xxx: {33} % cc /tmp/a.c
/tmp/a.c: In function main:
/tmp/a.c:10: `UCHAR_MIN' undeclared (first use this function)
/tmp/a.c:10: (Each undeclared identifier is reported only once
/tmp/a.c:10: for each function it appears in.)
xxx: {34} % grep UCHAR /usr/include/* /usr/include/machine/*
/usr/include/machine/limits.h:#define UCHAR_MAX 255 /* max value for an unsigned char */
Garrett Wollman wrote:
>
> <<On Mon, 14 Jul 1997 09:11:20 -0700 (PDT), "Jonathan M. Bresler" <jmb@FreeBSD.ORG> said:
>
> > ispunct() is only useful for ASCII input.
> > the correct way to use ispunct() and the rest of the functions
> > listed in ctype(3) is to call isascii() first
>
> BZZZZT!
>
> There is no such thing as isascii() in Standard C. The domain of all
> of the ctype(3) functions, as Bruce noted earlier in this thread, is
> [UCHAR_MIN,UCHAR_MAX] union {EOF}.
>
>
> wollman@khavrinen(173)$ cat >foo.c
> #include <ctype.h>
> #include <limits.h>
> #include <stdio.h>
>
> int
> main(void)
> {
> int c;
>
> for (c = UCHAR_MIN; c < UCHAR_MAX; c++) {
> if (ispunct(c))
> putchar(c);
> }
> putchar('\n');
> if (ispunct(EOF))
> printf("EOF\n");
> return 0;
> }
> wollman@khavrinen(174)$ cc -o foo foo.c
> wollman@khavrinen(175)$ ./foo
> !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿×÷
> wollman@khavrinen(176)$
>
> In case you can't read the high-bit characters there, they are all the
> punctuation characters from the ISO 8859-1 (``Latin 1'') character
> set.
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