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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [opt-functions.awk] - Rev 38
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# Copyright (C) 2003,2004, 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/>. # Some common subroutines for use by opt[ch]-gen.awk. # Return nonzero if FLAGS contains a flag matching REGEX. function flag_set_p(regex, flags) { return (" " flags " ") ~ (" " regex " ") } # Return STRING if FLAGS contains a flag matching regexp REGEX, # otherwise return the empty string. function test_flag(regex, flags, string) { if (flag_set_p(regex, flags)) return string return "" } # If FLAGS contains a "NAME(...argument...)" flag, return the value # of the argument. Return the empty string otherwise. function opt_args(name, flags) { flags = " " flags if (flags !~ " " name "\\(") return "" sub(".* " name "\\(", "", flags) sub("\\).*", "", flags) return flags } # Return the Nth comma-separated element of S. Return the empty string # if S does not contain N elements. function nth_arg(n, s) { while (n-- > 0) { if (s !~ ",") return "" sub("[^,]*, *", "", s) } sub(",.*", "", s) return s } # Return a bitmask of CL_* values for option flags FLAGS. function switch_flags (flags) { result = "0" for (j = 0; j < n_langs; j++) { regex = langs[j] gsub ( "\\+", "\\+", regex ) result = result test_flag(regex, flags, " | " macros[j]) } result = result \ test_flag("Common", flags, " | CL_COMMON") \ test_flag("Target", flags, " | CL_TARGET") \ test_flag("Joined", flags, " | CL_JOINED") \ test_flag("JoinedOrMissing", flags, " | CL_JOINED | CL_MISSING_OK") \ test_flag("Separate", flags, " | CL_SEPARATE") \ test_flag("RejectNegative", flags, " | CL_REJECT_NEGATIVE") \ test_flag("UInteger", flags, " | CL_UINTEGER") \ test_flag("Undocumented", flags, " | CL_UNDOCUMENTED") \ test_flag("Report", flags, " | CL_REPORT") sub( "^0 \\| ", "", result ) return result } # If FLAGS includes a Var flag, return the name of the variable it specifies. # Return the empty string otherwise. function var_name(flags) { return nth_arg(0, opt_args("Var", flags)) } # Return true if the option described by FLAGS has a globally-visible state. function global_state_p(flags) { return (var_name(flags) != "" \ || opt_args("Mask", flags) != "" \ || opt_args("InverseMask", flags) != "") } # Return true if the option described by FLAGS must have some state # associated with it. function needs_state_p(flags) { return flag_set_p("Target", flags) } # If FLAGS describes an option that needs a static state variable, # return the name of that variable, otherwise return "". NAME is # the name of the option. function static_var(name, flags) { if (global_state_p(flags) || !needs_state_p(flags)) return "" gsub ("[^A-Za-z0-9]", "_", name) return "VAR_" name } # Return the type of variable that should be associated with the given flags. function var_type(flags) { if (!flag_set_p("Joined.*", flags)) return "int " else if (flag_set_p("UInteger", flags)) return "int " else return "const char *" } # Given that an option has flags FLAGS, return an initializer for the # "var_cond" and "var_value" fields of its cl_options[] entry. function var_set(flags) { s = nth_arg(1, opt_args("Var", flags)) if (s != "") return "CLVC_EQUAL, " s s = opt_args("Mask", flags); if (s != "") { vn = var_name(flags); if (vn) return "CLVC_BIT_SET, OPTION_MASK_" s else return "CLVC_BIT_SET, MASK_" s } s = nth_arg(0, opt_args("InverseMask", flags)); if (s != "") { vn = var_name(flags); if (vn) return "CLVC_BIT_CLEAR, OPTION_MASK_" s else return "CLVC_BIT_CLEAR, MASK_" s } if (var_type(flags) == "const char *") return "CLVC_STRING, 0" return "CLVC_BOOLEAN, 0" } # Given that an option called NAME has flags FLAGS, return an initializer # for the "flag_var" field of its cl_options[] entry. function var_ref(name, flags) { name = var_name(flags) static_var(name, flags) if (name != "") return "&" name if (opt_args("Mask", flags) != "") return "&target_flags" if (opt_args("InverseMask", flags) != "") return "&target_flags" return "0" }
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