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comparison gcc/opt-functions.awk @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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-1:000000000000 0:a06113de4d67
1 # Copyright (C) 2003, 2004, 2007, 2008 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 3, 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; see the file COPYING3. If not see
17 # <http://www.gnu.org/licenses/>.
18
19 # Some common subroutines for use by opt[ch]-gen.awk.
20
21 # Return nonzero if FLAGS contains a flag matching REGEX.
22 function flag_set_p(regex, flags)
23 {
24 return (" " flags " ") ~ (" " regex " ")
25 }
26
27 # Return STRING if FLAGS contains a flag matching regexp REGEX,
28 # otherwise return the empty string.
29 function test_flag(regex, flags, string)
30 {
31 if (flag_set_p(regex, flags))
32 return string
33 return ""
34 }
35
36 # If FLAGS contains a "NAME(...argument...)" flag, return the value
37 # of the argument. Return the empty string otherwise.
38 function opt_args(name, flags)
39 {
40 flags = " " flags
41 if (flags !~ " " name "\\(")
42 return ""
43 sub(".* " name "\\(", "", flags)
44 sub("\\).*", "", flags)
45
46 return flags
47 }
48
49 # Return the Nth comma-separated element of S. Return the empty string
50 # if S does not contain N elements.
51 function nth_arg(n, s)
52 {
53 while (n-- > 0) {
54 if (s !~ ",")
55 return ""
56 sub("[^,]*, *", "", s)
57 }
58 sub(",.*", "", s)
59 return s
60 }
61
62 # Return a bitmask of CL_* values for option flags FLAGS.
63 function switch_flags (flags)
64 {
65 result = "0"
66 for (j = 0; j < n_langs; j++) {
67 regex = langs[j]
68 gsub ( "\\+", "\\+", regex )
69 result = result test_flag(regex, flags, " | " macros[j])
70 }
71 result = result \
72 test_flag("Common", flags, " | CL_COMMON") \
73 test_flag("Target", flags, " | CL_TARGET") \
74 test_flag("Save", flags, " | CL_SAVE") \
75 test_flag("Joined", flags, " | CL_JOINED") \
76 test_flag("JoinedOrMissing", flags, " | CL_JOINED | CL_MISSING_OK") \
77 test_flag("Separate", flags, " | CL_SEPARATE") \
78 test_flag("RejectNegative", flags, " | CL_REJECT_NEGATIVE") \
79 test_flag("UInteger", flags, " | CL_UINTEGER") \
80 test_flag("Undocumented", flags, " | CL_UNDOCUMENTED") \
81 test_flag("Warning", flags, " | CL_WARNING") \
82 test_flag("Optimization", flags, " | CL_OPTIMIZATION") \
83 test_flag("Report", flags, " | CL_REPORT")
84 sub( "^0 \\| ", "", result )
85 return result
86 }
87
88 # If FLAGS includes a Var flag, return the name of the variable it specifies.
89 # Return the empty string otherwise.
90 function var_name(flags)
91 {
92 return nth_arg(0, opt_args("Var", flags))
93 }
94
95 # Return true if the option described by FLAGS has a globally-visible state.
96 function global_state_p(flags)
97 {
98 return (var_name(flags) != "" \
99 || opt_args("Mask", flags) != "" \
100 || opt_args("InverseMask", flags) != "")
101 }
102
103 # Return true if the option described by FLAGS must have some state
104 # associated with it.
105 function needs_state_p(flags)
106 {
107 return flag_set_p("Target", flags)
108 }
109
110 # If FLAGS describes an option that needs a static state variable,
111 # return the name of that variable, otherwise return "". NAME is
112 # the name of the option.
113 function static_var(name, flags)
114 {
115 if (global_state_p(flags) || !needs_state_p(flags))
116 return ""
117 gsub ("[^A-Za-z0-9]", "_", name)
118 return "VAR_" name
119 }
120
121 # Return the type of variable that should be associated with the given flags.
122 function var_type(flags)
123 {
124 if (!flag_set_p("Joined.*", flags))
125 return "int "
126 else if (flag_set_p("UInteger", flags))
127 return "int "
128 else
129 return "const char *"
130 }
131
132 # Return the type of variable that should be associated with the given flags
133 # for use within a structure. Simple variables are changed to unsigned char
134 # type instead of int to save space.
135 function var_type_struct(flags)
136 {
137 if (flag_set_p("UInteger", flags))
138 return "int "
139 else if (!flag_set_p("Joined.*", flags)) {
140 if (flag_set_p(".*Mask.*", flags))
141 return "int "
142 else
143 return "unsigned char "
144 }
145 else
146 return "const char *"
147 }
148
149 # Given that an option has flags FLAGS, return an initializer for the
150 # "var_cond" and "var_value" fields of its cl_options[] entry.
151 function var_set(flags)
152 {
153 s = nth_arg(1, opt_args("Var", flags))
154 if (s != "")
155 return "CLVC_EQUAL, " s
156 s = opt_args("Mask", flags);
157 if (s != "") {
158 vn = var_name(flags);
159 if (vn)
160 return "CLVC_BIT_SET, OPTION_MASK_" s
161 else
162 return "CLVC_BIT_SET, MASK_" s
163 }
164 s = nth_arg(0, opt_args("InverseMask", flags));
165 if (s != "") {
166 vn = var_name(flags);
167 if (vn)
168 return "CLVC_BIT_CLEAR, OPTION_MASK_" s
169 else
170 return "CLVC_BIT_CLEAR, MASK_" s
171 }
172 if (var_type(flags) == "const char *")
173 return "CLVC_STRING, 0"
174 return "CLVC_BOOLEAN, 0"
175 }
176
177 # Given that an option called NAME has flags FLAGS, return an initializer
178 # for the "flag_var" field of its cl_options[] entry.
179 function var_ref(name, flags)
180 {
181 name = var_name(flags) static_var(name, flags)
182 if (name != "")
183 return "&" name
184 if (opt_args("Mask", flags) != "")
185 return "&target_flags"
186 if (opt_args("InverseMask", flags) != "")
187 return "&target_flags"
188 return "0"
189 }