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To print from the first line until pattern is matched
Post 302934848 by disedorgue on Wednesday 11th of February 2015 10:49:33 AM
02-11-2015
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LEARN ABOUT PLAN9
iswalnum
ISWALNUM(3) Linux Programmer's Manual ISWALNUM(3) NAME
iswalnum - test for alphanumeric wide character SYNOPSIS
#include <wctype.h> int iswalnum(wint_t wc); DESCRIPTION
The iswalnum() function is the wide-character equivalent of the isalnum(3) function. It tests whether wc is a wide character belonging to the wide-character class "alnum". The wide-character class "alnum" is a subclass of the wide-character class "graph", and therefore also a subclass of the wide-character class "print". Being a subclass of the wide-character class "print", the wide-character class "alnum" is disjoint from the wide-character class "cntrl". Being a subclass of the wide-character class "graph", the wide-character class "alnum" is disjoint from the wide-character class "space" and its subclass "blank". The wide-character class "alnum" is disjoint from the wide-character class "punct". The wide-character class "alnum" is the union of the wide-character classes "alpha" and "digit". As such, it also contains the wide-char- acter class "xdigit". The wide-character class "alnum" always contains at least the letters 'A' to 'Z', 'a' to 'z' and the digits '0' to '9'. RETURN VALUE
The iswalnum() function returns nonzero if wc is a wide character belonging to the wide-character class "alnum". Otherwise, it returns zero. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +-----------+---------------+----------------+ |Interface | Attribute | Value | +-----------+---------------+----------------+ |iswalnum() | Thread safety | MT-Safe locale | +-----------+---------------+----------------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99. NOTES
The behavior of iswalnum() depends on the LC_CTYPE category of the current locale. SEE ALSO
isalnum(3), iswctype(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2015-08-08 ISWALNUM(3)