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#!/usr/bin/mawk -We
# *********************************************************************
# Written by and copyright Carlo Strozzi <carlos@linux.it>.
#
# addcolumn: append new empty columns to a NoSQL table.
# Copyright (C) 1998-2001 Carlo Strozzi <carlos@linux.it>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# 2001-01-03 Ported to NoSQL v3
# 2001-04-17 Added inline help
# 2001-08-17 Added stdio portability
#
# $Id$
# *********************************************************************
BEGIN {
NULL = ""; FS = OFS = "\t"
while (ARGV[++i] != NULL) {
if (ARGV[i] == "-i" || ARGV[i] == "--input") i_file = ARGV[++i]
else if (ARGV[i] == "-o" || ARGV[i] == "--output") o_file = ARGV[++i]
else if (ARGV[i] == "-h" || ARGV[i] == "--help") {
system("grep -v '^#' @DOCPATH@/addcolumn.txt")
rc = 1
exit(rc)
}
else new_cols[++j] = ARGV[i]
}
ARGC = 1 # Fix argv[]
if (o_file == NULL) o_file = "@STDOUT@"
if (i_file != NULL) { ARGV[1] = i_file; ARGC = 2 }
}
#
# Main loop
#
NR == 1 {
i = 0
while (new_cols[++i] != NULL) {
$0 = $0 OFS new_cols[i]
padding = padding OFS
}
# Remove extra OFS from the beginning of header and dashline.
sub(/^\t/, NULL, $0)
sub(/^\t/, NULL, padding)
# print header and dashline (if not null).
if ($0 != NULL) { print > o_file; gsub(/[^\t]/, "-"); print > o_file }
}
NR == 2 { next }
NR > 2 { print $0, padding > o_file }
#
# End of program.
#
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