1#  Copyright (C) 2003,2004 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 duplicat options and generates a
21# C file.
22#
23# This program uses functions from opt-functions.awk
24#
25# Usage: awk -f opt-functions.awk -f optc-gen.awk \
26#            [-v header_name=header.h] < inputfile > options.c
27
28BEGIN {
29	n_opts = 0
30	n_langs = 0
31        quote = "\042"
32	comma = ","
33	FS=SUBSEP
34	# Default the name of header created from opth-gen.awk to options.h
35	if (header_name == "") header_name="options.h"
36}
37
38# Collect the text and flags of each option into an array
39	{
40		if ($1 == "Language") {
41			langs[n_langs] = $2
42			n_langs++;
43		}
44		else {
45			name = opt_args("Mask", $1)
46			if (name == "") {
47				opts[n_opts]  = $1
48				flags[n_opts] = $2
49				help[n_opts]  = $3
50				n_opts++;
51			}
52		}
53	}
54
55# Dump that array of options into a C file.
56END {
57print "/* This file is auto-generated by opts.sh.  */"
58print ""
59n_headers = split(header_name, headers, " ")
60for (i = 1; i <= n_headers; i++)
61	print "#include " quote headers[i] quote
62print "#include " quote "opts.h" quote
63print "#include " quote "intl.h" quote
64print ""
65print "#ifdef GCC_DRIVER"
66print "int target_flags;"
67print "#endif /* GCC_DRIVER */"
68print ""
69
70for (i = 0; i < n_opts; i++) {
71	name = var_name(flags[i]);
72	if (name == "")
73		continue;
74
75	if (flag_set_p("VarExists", flags[i])) {
76		# Need it for the gcc driver.
77		if (name in var_seen)
78			continue;
79		init = ""
80		gcc_driver = 1
81	}
82	else {
83		init = opt_args("Init", flags[i])
84		if (init != "")
85			init = " = " init;
86		else if (name in var_seen)
87			continue;
88		gcc_driver = 0
89	}
90
91	if (gcc_driver == 1)
92		print "#ifdef GCC_DRIVER"
93	print "/* Set by -" opts[i] "."
94	print "   " help[i] "  */"
95	print var_type(flags[i]) name init ";"
96	if (gcc_driver == 1)
97		print "#endif /* GCC_DRIVER */"
98	print ""
99
100	var_seen[name] = 1;
101}
102
103print ""
104print "/* Local state variables.  */"
105for (i = 0; i < n_opts; i++) {
106	name = static_var(opts[i], flags[i]);
107	if (name != "")
108		print "static " var_type(flags[i]) name ";"
109}
110print ""
111
112print "const char * const lang_names[] =\n{"
113for (i = 0; i < n_langs; i++) {
114	macros[i] = "CL_" langs[i]
115	gsub( "[^A-Za-z0-9_]", "X", macros[i] )
116	s = substr("         ", length (macros[i]))
117	print "  " quote langs[i] quote ","
118    }
119
120print "  0\n};\n"
121print "const unsigned int cl_options_count = N_OPTS;\n"
122
123print "const struct cl_option cl_options[] =\n{"
124
125j = 0
126for (i = 0; i < n_opts; i++) {
127	back_chain[i] = "N_OPTS";
128	indices[opts[i]] = j;
129	# Combine the flags of identical switches.  Switches
130	# appear many times if they are handled by many front
131	# ends, for example.
132	while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
133		flags[i + 1] = flags[i] " " flags[i + 1];
134		i++;
135		back_chain[i] = "N_OPTS";
136		indices[opts[i]] = j;
137	}
138	j++;
139}
140
141for (i = 0; i < n_opts; i++) {
142	# Combine the flags of identical switches.  Switches
143	# appear many times if they are handled by many front
144	# ends, for example.
145	while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
146		flags[i + 1] = flags[i] " " flags[i + 1];
147		i++;
148	}
149
150	len = length (opts[i]);
151	enum = "OPT_" opts[i]
152	if (opts[i] == "finline-limit=")
153		enum = enum "eq"
154	gsub ("[^A-Za-z0-9]", "_", enum)
155
156	# If this switch takes joined arguments, back-chain all
157	# subsequent switches to it for which it is a prefix.  If
158	# a later switch S is a longer prefix of a switch T, T
159	# will be back-chained to S in a later iteration of this
160	# for() loop, which is what we want.
161	if (flag_set_p("Joined.*", flags[i])) {
162		for (j = i + 1; j < n_opts; j++) {
163			if (substr (opts[j], 1, len) != opts[i])
164				break;
165			back_chain[j] = enum;
166		}
167	}
168
169	s = substr("                                  ", length (opts[i]))
170	if (i + 1 == n_opts)
171		comma = ""
172
173	if (help[i] == "")
174		hlp = "0"
175	else
176		hlp = quote help[i] quote;
177
178	neg = opt_args("Negative", flags[i]);
179	if (neg != "")
180		idx = indices[neg]
181	else {
182		if (flag_set_p("RejectNegative", flags[i]))
183			idx = -1;
184		else {
185			if (opts[i] ~ "^[Wfm]")
186				idx = indices[opts[i]];
187			else
188				idx = -1;
189		}
190	}
191	printf("  { %c-%s%c,\n    %s,\n    %s, %u, %d,\n",
192	       quote, opts[i], quote, hlp, back_chain[i], len, idx)
193	condition = opt_args("Condition", flags[i])
194	cl_flags = switch_flags(flags[i])
195	if (condition != "")
196		printf("#if %s\n" \
197		       "    %s,\n" \
198		       "#else\n" \
199		       "    CL_DISABLED,\n" \
200		       "#endif\n",
201		       condition, cl_flags, cl_flags)
202	else
203		printf("    %s,\n", cl_flags)
204	printf("    %s, %s }%s\n", var_ref(opts[i], flags[i]),
205	       var_set(flags[i]), comma)
206}
207
208print "};"
209}
210