1# Copyright (C) 2003,2004,2005,2006 Free Software Foundation, Inc. 2# Contributed by Kelley Cook, June 2004. 3# Original code from Neil Booth, May 2003. 4# 5# This program is free software; you can redistribute it and/or modify it 6# under the terms of the GNU General Public License as published by the 7# Free Software Foundation; either version 2, or (at your option) any 8# later version. 9# 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14# 15# You should have received a copy of the GNU General Public License 16# along with this program; if not, write to the Free Software 17# Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 18 19# This Awk script reads in the option records generated from 20# opt-gather.awk, combines the flags of duplicate options and generates a 21# C header file. 22# 23# This program uses functions from opt-functions.awk 24# Usage: awk -f opt-functions.awk -f opth-gen.awk < inputfile > options.h 25 26BEGIN { 27 n_opts = 0 28 n_langs = 0 29 n_extra_masks = 0 30 quote = "\042" 31 comma = "," 32 FS=SUBSEP 33} 34 35# Collect the text and flags of each option into an array 36 { 37 if ($1 == "Language") { 38 langs[n_langs] = $2 39 n_langs++; 40 } 41 else { 42 name = opt_args("Mask", $1) 43 if (name == "") { 44 opts[n_opts] = $1 45 flags[n_opts] = $2 46 help[n_opts] = $3 47 n_opts++; 48 } 49 else { 50 extra_masks[n_extra_masks++] = name 51 } 52 } 53 } 54 55# Dump out an enumeration into a .h file. 56# Combine the flags of duplicate options. 57END { 58print "/* This file is auto-generated by opts.sh. */" 59print "" 60print "#ifndef OPTIONS_H" 61print "#define OPTIONS_H" 62print "" 63print "extern int target_flags;" 64print "" 65 66for (i = 0; i < n_opts; i++) { 67 name = var_name(flags[i]); 68 if (name == "") 69 continue; 70 71 print "extern " var_type(flags[i]) name ";" 72} 73print "" 74 75for (i = 0; i < n_opts; i++) { 76 name = opt_args("Mask", flags[i]) 77 vname = var_name(flags[i]) 78 mask = "MASK_" 79 if (vname != "") { 80 mask = "OPTION_MASK_" 81 } 82 if (name != "" && !flag_set_p("MaskExists", flags[i])) 83 print "#define " mask name " (1 << " masknum[vname]++ ")" 84} 85for (i = 0; i < n_extra_masks; i++) { 86 print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")" 87} 88 89for (var in masknum) { 90 if (masknum[var] > 32) { 91 if (var == "") 92 print "#error too many target masks" 93 else 94 print "#error too many masks for " var 95 } 96} 97print "" 98 99for (i = 0; i < n_opts; i++) { 100 name = opt_args("Mask", flags[i]) 101 vname = var_name(flags[i]) 102 macro = "OPTION_" 103 mask = "OPTION_MASK_" 104 if (vname == "") { 105 vname = "target_flags" 106 macro = "TARGET_" 107 mask = "MASK_" 108 } 109 if (name != "" && !flag_set_p("MaskExists", flags[i])) 110 print "#define " macro name \ 111 " ((" vname " & " mask name ") != 0)" 112} 113for (i = 0; i < n_extra_masks; i++) { 114 print "#define TARGET_" extra_masks[i] \ 115 " ((target_flags & MASK_" extra_masks[i] ") != 0)" 116} 117print "" 118 119for (i = 0; i < n_opts; i++) { 120 opt = opt_args("InverseMask", flags[i]) 121 if (opt ~ ",") { 122 vname = var_name(flags[i]) 123 macro = "OPTION_" 124 mask = "OPTION_MASK_" 125 if (vname == "") { 126 vname = "target_flags" 127 macro = "TARGET_" 128 mask = "MASK_" 129 } 130 print "#define " macro nth_arg(1, opt) \ 131 " ((" vname " & " mask nth_arg(0, opt) ") == 0)" 132 } 133} 134print "" 135 136for (i = 0; i < n_langs; i++) { 137 macros[i] = "CL_" langs[i] 138 gsub( "[^A-Za-z0-9_]", "X", macros[i] ) 139 s = substr(" ", length (macros[i])) 140 print "#define " macros[i] s " (1 << " i ")" 141 } 142 143print "" 144print "enum opt_code" 145print "{" 146 147for (i = 0; i < n_opts; i++) 148 back_chain[i] = "N_OPTS"; 149 150for (i = 0; i < n_opts; i++) { 151 # Combine the flags of identical switches. Switches 152 # appear many times if they are handled by many front 153 # ends, for example. 154 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { 155 flags[i + 1] = flags[i] " " flags[i + 1]; 156 i++; 157 } 158 159 len = length (opts[i]); 160 enum = "OPT_" opts[i] 161 if (opts[i] == "finline-limit=") 162 enum = enum "eq" 163 gsub ("[^A-Za-z0-9]", "_", enum) 164 165 # If this switch takes joined arguments, back-chain all 166 # subsequent switches to it for which it is a prefix. If 167 # a later switch S is a longer prefix of a switch T, T 168 # will be back-chained to S in a later iteration of this 169 # for() loop, which is what we want. 170 if (flag_set_p("Joined.*", flags[i])) { 171 for (j = i + 1; j < n_opts; j++) { 172 if (substr (opts[j], 1, len) != opts[i]) 173 break; 174 back_chain[j] = enum; 175 } 176 } 177 178 s = substr(" ", length (opts[i])) 179 if (i + 1 == n_opts) 180 comma = "" 181 182 if (help[i] == "") 183 hlp = "0" 184 else 185 hlp = "N_(\"" help[i] "\")"; 186 187 print " " enum "," s "/* -" opts[i] " */" 188} 189 190print " N_OPTS" 191print "};" 192print "" 193print "#endif /* OPTIONS_H */" 194} 195