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#!/bin/sh
#
# Copyright (C) 2003 Free Software Foundation, Inc.
# Contributed by Neil Booth, May 2003.
#
# 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, 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Usage: opts.sh outfile.c outfile.h file1.opt [file2.opt, ...]
# Always operate in the C locale.
LANG=C
LANGUAGE=C
LC_ALL=C
export LANG LANGUAGE LC_ALL
# Set AWK if environment has not already set it.
AWK=${AWK-awk}
SORT=sort # Could be /bin/sort or /usr/bin/sort
C_FILE=$1; shift
H_FILE=$1; shift
${AWK} '
# Ignore comments and blank lines
/^[ \t]*(;|$)/ { next }
# Note that RS="" falls foul of gawk 3.1.2 bugs
/^[^ \t]/ { getline tmp; print $0 "\034" tmp}
' "$@" | ${SORT} | ${AWK} '
function switch_flags (flags, result)
{
flags = " " flags " "
result = "0"
for (j = 0; j < n_langs; j++) {
regex = " " langs[j] " "
gsub ( "\\+", "\\+", regex )
if (flags ~ regex)
result = result " | " macros[j]
}
if (flags ~ " Common ") result = result " | CL_COMMON"
if (flags ~ " Joined ") result = result " | CL_JOINED"
if (flags ~ " JoinedOrMissing ") \
result = result " | CL_JOINED | CL_MISSING_OK"
if (flags ~ " Separate ") result = result " | CL_SEPARATE"
if (flags ~ " RejectNegative ") result = result " | CL_REJECT_NEGATIVE"
if (flags ~ " UInteger ") result = result " | CL_UINTEGER"
sub( "^0 \\| ", "", result )
return result
}
BEGIN {
FS = "\034"
n_opts = 0
n_langs = 0
}
# Collect the text and flags of each option into an array
{
if ($1 == "Language") {
langs[n_langs] = $2
n_langs++;
} else {
opts[n_opts] = $1
flags[n_opts] = $2
n_opts++;
}
}
# Dump out an enumeration into a .h file, and an array of options into a
# C file. Combine the flags of duplicate options.
END {
c_file = "'${C_FILE}'"
h_file = "'${H_FILE}'"
comma = ","
print "/* This file is auto-generated by opts.sh. */\n" > c_file
print "#include \"" h_file "\"" >> c_file
print "#include \"opts.h\"\n" >> c_file
print "const char * const lang_names[] =\n{" >> c_file
print "/* This file is auto-generated by opts.sh. */\n" > h_file
for (i = 0; i < n_langs; i++) {
macros[i] = "CL_" langs[i]
gsub( "[^A-Za-z0-9_]", "X", macros[i] )
s = substr(" ", length (macros[i]))
print "#define " macros[i] s " (1 << " i ")" >> h_file
print " \"" langs[i] "\"," >> c_file
}
print " 0\n};\n" >> c_file
print "const unsigned int cl_options_count = N_OPTS;\n" >> c_file
print "const struct cl_option cl_options[] =\n{" >> c_file
print "\nenum opt_code\n{" >> h_file
for (i = 0; i < n_opts; i++)
back_chain[i] = "N_OPTS";
for (i = 0; i < n_opts; i++) {
# Combine the flags of identical switches. Switches
# appear many times if they are handled by many front
# ends, for example.
while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
flags[i + 1] = flags[i] " " flags[i + 1];
i++;
}
len = length (opts[i]);
enum = "OPT_" opts[i]
if (opts[i] == "finline-limit=")
enum = enum "eq"
gsub ("[^A-Za-z0-9]", "_", enum)
# If this switch takes joined arguments, back-chain all
# subsequent switches to it for which it is a prefix. If
# a later switch S is a longer prefix of a switch T, T
# will be back-chained to S in a later iteration of this
# for() loop, which is what we want.
if (flags[i] ~ "Joined") {
for (j = i + 1; j < n_opts; j++) {
if (substr (opts[j], 1, len) != opts[i])
break;
back_chain[j] = enum;
}
}
s = substr(" ", length (opts[i]))
if (i + 1 == n_opts)
comma = ""
printf(" %s,%s/* -%s */\n", enum, s, opts[i]) >> h_file
printf(" { \"%s\", (unsigned short) %s, %u,\n\t%s }%s\n",
opts[i], back_chain[i], len, switch_flags(flags[i]),
comma) >> c_file
}
print " N_OPTS\n};" >> h_file
print "};" >> c_file
}
'
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