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