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#  Copyright (C) 2003,2004,2005,2006,2007 Free Software Foundation, Inc.

#  Contributed by Kelley Cook, June 2004.

#  Original code from 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 3, 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; see the file COPYING3.  If not see

# <http://www.gnu.org/licenses/>.

# This Awk script reads in the option records generated from

# opt-gather.awk, combines the flags of duplicate options and generates a

# C header file.

#

# This program uses functions from opt-functions.awk

# Usage: awk -f opt-functions.awk -f opth-gen.awk < inputfile > options.h

BEGIN {

        n_opts = 0

        n_langs = 0

        n_extra_masks = 0

        quote = "\042"

        comma = ","

        FS=SUBSEP

}

# Collect the text and flags of each option into an array

        {

                if ($1 == "Language") {

                        langs[n_langs] = $2

                        n_langs++;

                }

                else {

                        name = opt_args("Mask", $1)

                        if (name == "") {

                                opts[n_opts]  = $1

                                flags[n_opts] = $2

                                help[n_opts]  = $3

                                n_opts++;

                        }

                        else {

                                extra_masks[n_extra_masks++] = name

                        }

                }

        }

# Dump out an enumeration into a .h file.

# Combine the flags of duplicate options.

END {

print "/* This file is auto-generated by opts.sh.  */"

print ""

print "#ifndef OPTIONS_H"

print "#define OPTIONS_H"

print ""

print "extern int target_flags;"

print ""

for (i = 0; i < n_opts; i++) {

        name = var_name(flags[i]);

        if (name == "")

                continue;

        print "extern " var_type(flags[i]) name ";"

}

print ""

for (i = 0; i < n_opts; i++) {

        name = opt_args("Mask", flags[i])

        vname = var_name(flags[i])

        mask = "MASK_"

        if (vname != "") {

                mask = "OPTION_MASK_"

        }

        if (name != "" && !flag_set_p("MaskExists", flags[i]))

                print "#define " mask name " (1 << " masknum[vname]++ ")"

}

for (i = 0; i < n_extra_masks; i++) {

        print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")"

}

for (var in masknum) {

        if (masknum[var] > 31) {

                if (var == "")

                        print "#error too many target masks"

                else

                        print "#error too many masks for " var

        }

}

print ""

for (i = 0; i < n_opts; i++) {

        name = opt_args("Mask", flags[i])

        vname = var_name(flags[i])

        macro = "OPTION_"

        mask = "OPTION_MASK_"

        if (vname == "") {

                vname = "target_flags"

                macro = "TARGET_"

                mask = "MASK_"

        }

        if (name != "" && !flag_set_p("MaskExists", flags[i]))

                print "#define " macro name \

                      " ((" vname " & " mask name ") != 0)"

}

for (i = 0; i < n_extra_masks; i++) {

        print "#define TARGET_" extra_masks[i] \

              " ((target_flags & MASK_" extra_masks[i] ") != 0)"

}

print ""

for (i = 0; i < n_opts; i++) {

        opt = opt_args("InverseMask", flags[i])

        if (opt ~ ",") {

                vname = var_name(flags[i])

                macro = "OPTION_"

                mask = "OPTION_MASK_"

                if (vname == "") {

                        vname = "target_flags"

                        macro = "TARGET_"

                        mask = "MASK_"

                }

                print "#define " macro nth_arg(1, opt) \

                      " ((" vname " & " mask nth_arg(0, opt) ") == 0)"

        }

}

print ""

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 ")"

    }

print ""

print "enum opt_code"

print "{"

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 (flag_set_p("Joined.*", flags[i])) {

                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 = ""

        if (help[i] == "")

                hlp = "0"

        else

                hlp = "N_(\"" help[i] "\")";

        print "  " enum "," s "/* -" opts[i] " */"

}

print "  N_OPTS"

print "};"

print ""

print "#endif /* OPTIONS_H */"

}