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# Written by Aleksey Cheusov <vle@gmx.net>, public domain
#
# This awk module is a part of RunAWK distribution,
# http://sourceforge.net/projects/runawk
#
############################################################
# =head2 init_getopt.awk
#
# Initialization step for power_getopt.awk module. In some cases it
# makes sense to process options in a while() loop. This module
# allows doing this. See the documentation about how options are
# initialized in power_getopt.awk module.
#
# =over 2
#
# =item I<print_help ()>
#
# display help message.
#
# =back
#
#use "alt_getopt.awk"
#use "embed_str.awk"
function print_help ( i){
for (i = 1; i <= _help_msg_cnt; ++i){
if (_help_msg_arr [i] ~ /^[ \t]*=/){
sub(/=/, "-", _help_msg_arr [i])
}
print _help_msg_arr [i] > "/dev/stderr"
}
}
BEGIN {
if ("help" in EMBED_STR){
_help_msg = EMBED_STR ["help"]
_help_msg_cnt = split(_help_msg, _help_msg_arr, /\n/)
for (i = 1; i <= _help_msg_cnt; ++i){
if (match(_help_msg_arr [i], /^[ \t]*[-=][^ \t]+/)){
_opt = substr(_help_msg_arr [i], RSTART, RLENGTH)
sub(/^[ \t]+/, "", _opt)
if (_opt ~ /^-.[|]--.+$/){
# -h|--help
_sopt = substr(_opt, 1, 2)
_lopt = substr(_opt, 4)
}else if (_opt ~ /^=.[|]--.+$/){
# =h|--help
_sopt = substr(_opt, 1, 2)
_lopt = "=" substr(_opt, 5)
}else if (_opt ~ /^[-=].$/){
# -h or =h
_sopt = _opt
_lopt = ""
}else if (_opt ~ /^[-=]-.+$/){
# --help or =-help
_sopt = ""
_lopt = _opt
}
if (_sopt ~ /^-.$/){
# -h
short_opts = short_opts substr(_sopt, 2, 1)
}else if (_sopt ~ /^=.$/){
# =F
short_opts = short_opts substr(_sopt, 2, 1) ":"
}
sub(/^[-=]/, "", _sopt)
if (_lopt ~ /^--.+$/){
# --help
long_opts [substr(_lopt, 3)] = _sopt
}else if (_lopt ~ /^=-.+$/){
# =-FLAG
if (_sopt != "")
long_opts [substr(_lopt, 3)] = _sopt
else
long_opts [substr(_lopt, 3)] = takes_arg
}
}
}
}
}
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