Mercurial > hg > CbC > CbC_gcc
diff gcc/opt-functions.awk @ 0:a06113de4d67
first commit
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
parents | |
children | 77e2b8dfacca |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/opt-functions.awk Fri Jul 17 14:47:48 2009 +0900 @@ -0,0 +1,189 @@ +# Copyright (C) 2003, 2004, 2007, 2008 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("Save", flags, " | CL_SAVE") \ + 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("Warning", flags, " | CL_WARNING") \ + test_flag("Optimization", flags, " | CL_OPTIMIZATION") \ + 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 *" +} + +# Return the type of variable that should be associated with the given flags +# for use within a structure. Simple variables are changed to unsigned char +# type instead of int to save space. +function var_type_struct(flags) +{ + if (flag_set_p("UInteger", flags)) + return "int " + else if (!flag_set_p("Joined.*", flags)) { + if (flag_set_p(".*Mask.*", flags)) + return "int " + else + return "unsigned char " + } + 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" +}