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if [ ! "$_STRINGS_SUBR" ]; then _STRINGS_SUBR=1
#
# Copyright (c) 2006-2012 Devin Teske
# All Rights Reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
# f_substr "$string" $start [ $length ]
#
# Simple wrapper to awk(1)'s `substr' function.
#
f_substr()
{
local string="$1" start="${2:-0}" len="${3:-0}"
echo "$string" | awk "{ print substr(\$0, $start, $len) }"
}
# f_longest_line_length
#
# Simple wrapper to an awk(1) script to print the length of the longest line of
# input (read from stdin). Supports the newline escape-sequence `\n' for
# splitting a single line into multiple lines.
#
f_longest_line_length_awk='
BEGIN { longest = 0 }
{
if (split($0, lines, /\\n/) > 1)
{
for (n in lines)
{
len = length(lines[n])
longest = ( len > longest ? len : longest )
}
}
else
{
len = length($0)
longest = ( len > longest ? len : longest )
}
}
END { print longest }
'
f_longest_line_length()
{
awk "$f_longest_line_length_awk"
}
# f_number_of_lines
#
# Simple wrapper to an awk(1) script to print the number of lines read from
# stdin. Supports newline escape-sequence `\n' for splitting a single line into
# multiple lines.
#
f_number_of_lines_awk='
BEGIN { num_lines = 0 }
{
num_lines += split($0, unused, /\\n/)
}
END { print num_lines }
'
f_number_of_lines()
{
awk "$f_number_of_lines_awk"
}
# f_isinteger $arg
#
# Returns true if argument is a positive/negative whole integer.
#
f_isinteger()
{
local arg="$1"
# Prevent division-by-zero
[ "$arg" = "0" ] && return $SUCCESS
# Attempt to perform arithmetic divison (an operation which will exit
# with error unless arg is a valid positive/negative whole integer).
#
( : $((0/$arg)) ) > /dev/null 2>&1
}
fi # ! $_STRINGS_SUBR
|
