1 # Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
2 # Free Software Foundation, Inc.
3 # Contributed by Kelley Cook, June 2004.
4 # Original code from Neil Booth, May 2003.
6 # This program is free software; you can redistribute it and/or modify it
7 # under the terms of the GNU General Public License as published by the
8 # Free Software Foundation; either version 3, or (at your option) any
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; see the file COPYING3. If not see
18 # <http://www.gnu.org/licenses/>.
20 # Some common subroutines for use by opt[ch]-gen.awk.
22 # Define some helpful character classes, for portability.
24 lower = "abcdefghijklmnopqrstuvwxyz"
25 upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
27 alnum = lower "" upper "" digit
30 # Return nonzero if FLAGS contains a flag matching REGEX.
31 function flag_set_p(regex, flags)
33 return (" " flags " ") ~ (" " regex " ")
36 # Return STRING if FLAGS contains a flag matching regexp REGEX,
37 # otherwise return the empty string.
38 function test_flag(regex, flags, string)
40 if (flag_set_p(regex, flags))
45 # If FLAGS contains a "NAME(...argument...)" flag, return the value
46 # of the argument. Return the empty string otherwise.
47 function opt_args(name, flags)
50 if (flags !~ " " name "\\(")
52 sub(".* " name "\\(", "", flags)
56 sub("}\\).*", "", flags)
59 sub("\\).*", "", flags)
64 # Return the Nth comma-separated element of S. Return the empty string
65 # if S does not contain N elements.
66 function nth_arg(n, s)
71 sub("[^,]*, *", "", s)
77 # Return a bitmask of CL_* values for option flags FLAGS.
78 function switch_flags (flags)
81 for (j = 0; j < n_langs; j++) {
83 gsub ( "\\+", "\\+", regex )
84 result = result test_flag(regex, flags, " | " macros[j])
87 test_flag("Common", flags, " | CL_COMMON") \
88 test_flag("Target", flags, " | CL_TARGET") \
89 test_flag("Driver", flags, " | CL_DRIVER") \
90 test_flag("RejectDriver", flags, " | CL_REJECT_DRIVER") \
91 test_flag("NoDriverArg", flags, " | CL_NO_DRIVER_ARG") \
92 test_flag("SeparateAlias", flags, " | CL_SEPARATE_ALIAS") \
93 test_flag("Save", flags, " | CL_SAVE") \
94 test_flag("Joined", flags, " | CL_JOINED") \
95 test_flag("JoinedOrMissing", flags, " | CL_JOINED | CL_MISSING_OK") \
96 test_flag("Separate", flags, " | CL_SEPARATE") \
97 test_flag("RejectNegative", flags, " | CL_REJECT_NEGATIVE") \
98 test_flag("UInteger", flags, " | CL_UINTEGER") \
99 test_flag("Undocumented", flags, " | CL_UNDOCUMENTED") \
100 test_flag("Warning", flags, " | CL_WARNING") \
101 test_flag("Optimization", flags, " | CL_OPTIMIZATION") \
102 test_flag("Report", flags, " | CL_REPORT")
103 sub( "^0 \\| ", "", result )
107 # If FLAGS includes a Var flag, return the name of the variable it specifies.
108 # Return the empty string otherwise.
109 function var_name(flags)
111 return nth_arg(0, opt_args("Var", flags))
114 # Return true if the option described by FLAGS has a globally-visible state.
115 function global_state_p(flags)
117 return (var_name(flags) != "" \
118 || opt_args("Mask", flags) != "" \
119 || opt_args("InverseMask", flags) != "")
122 # Return true if the option described by FLAGS must have some state
123 # associated with it.
124 function needs_state_p(flags)
126 return (flag_set_p("Target", flags) \
127 && !flag_set_p("Alias.*", flags) \
128 && !flag_set_p("Ignore", flags))
131 # If FLAGS describes an option that needs state without a public
132 # variable name, return the name of that field, minus the initial
133 # "x_", otherwise return "". NAME is the name of the option.
134 function static_var(name, flags)
136 if (global_state_p(flags) || !needs_state_p(flags))
138 gsub ("[^" alnum "]", "_", name)
142 # Return the type of variable that should be associated with the given flags.
143 function var_type(flags)
145 if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags))
147 else if (flag_set_p("UInteger", flags))
150 return "const char *"
153 # Return the type of variable that should be associated with the given flags
154 # for use within a structure. Simple variables are changed to signed char
155 # type instead of int to save space.
156 function var_type_struct(flags)
158 if (flag_set_p("UInteger", flags))
160 else if (!flag_set_p("Joined.*", flags) && !flag_set_p("Separate", flags)) {
161 if (flag_set_p(".*Mask.*", flags))
164 return "signed char "
167 return "const char *"
170 # Given that an option has flags FLAGS, return an initializer for the
171 # "var_cond" and "var_value" fields of its cl_options[] entry.
172 function var_set(flags)
174 s = nth_arg(1, opt_args("Var", flags))
176 return "CLVC_EQUAL, " s
177 s = opt_args("Mask", flags);
179 vn = var_name(flags);
181 return "CLVC_BIT_SET, OPTION_MASK_" s
183 return "CLVC_BIT_SET, MASK_" s
185 s = nth_arg(0, opt_args("InverseMask", flags));
187 vn = var_name(flags);
189 return "CLVC_BIT_CLEAR, OPTION_MASK_" s
191 return "CLVC_BIT_CLEAR, MASK_" s
193 if (var_type(flags) == "const char *")
194 return "CLVC_STRING, 0"
195 return "CLVC_BOOLEAN, 0"
198 # Given that an option called NAME has flags FLAGS, return an initializer
199 # for the "flag_var" field of its cl_options[] entry.
200 function var_ref(name, flags)
202 name = var_name(flags) static_var(name, flags)
204 return "offsetof (struct gcc_options, x_" name ")"
205 if (opt_args("Mask", flags) != "")
206 return "offsetof (struct gcc_options, x_target_flags)"
207 if (opt_args("InverseMask", flags) != "")
208 return "offsetof (struct gcc_options, x_target_flags)"
212 # Given the option called NAME return a sanitized version of its name.
213 function opt_sanitized_name(name)
215 gsub ("[^" alnum "]", "_", name)
219 # Given the option called NAME return the appropriate enum for it.
220 function opt_enum(name)
222 return "OPT_" opt_sanitized_name(name)