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66 lines
2.1 KiB
Plaintext
66 lines
2.1 KiB
Plaintext
NAME
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substr - extract a substring of given string
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SYNOPSIS
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substr(str, pos, len)
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TYPES
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str string
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pos nonnegative integer
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len nonnegative integer
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return string
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DESCRIPTION
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If pos > length of str or len is zero, the null string "" is returned.
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If 1 <= pos <= strlen(str), substr(str, pos, len) returns the
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string of length min(strlen(str) - pos + 1, len) formed by
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consecutive characters of str starting at position pos, i.e. the
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string has length len if this is possible, otherwise it ends with
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the last character of str. (The first character has pos = 1, the
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second pos = 2, etc.)
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If pos = 0, the result is the same as for pos = 1.
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EXAMPLE
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; A = "abcde";
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; print substr(A,0,2), substr(A,1,2), substr(A,4,1), substr(A,3,5)
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ab ab d cde
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LIMITS
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none
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LINK LIBRARY
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none
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SEE ALSO
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strcat, strcpy, strerror, strlen, strncmp, strncpy, strpos,
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strprintf, strscan, strscanf
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## Copyright (C) 1999-2006 Ernest Bowen
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## @(#) $Revision: 30.1 $
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## @(#) $Id: substr,v 30.1 2007/03/16 11:10:42 chongo Exp $
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## @(#) $Source: /usr/local/src/bin/calc/help/RCS/substr,v $
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##
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## Under source code control: 1995/10/05 04:52:27
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## File existed as early as: 1995
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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