-# Copyright (C) 2003,2004 Free Software Foundation, Inc.
+# 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 2, or (at your option) any
+# 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,
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+# 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)
{
- flags = " " flags " "
result = "0"
for (j = 0; j < n_langs; j++) {
- regex = " " langs[j] " "
+ regex = langs[j]
gsub ( "\\+", "\\+", regex )
- if (flags ~ regex)
- result = result " | " macros[j]
+ result = result test_flag(regex, flags, " | " macros[j])
}
- if (flags ~ " Common ") result = result " | CL_COMMON"
- if (flags ~ " Joined ") result = result " | CL_JOINED"
- if (flags ~ " JoinedOrMissing ") \
- result = result " | CL_JOINED | CL_MISSING_OK"
- if (flags ~ " Separate ") result = result " | CL_SEPARATE"
- if (flags ~ " RejectNegative ") result = result " | CL_REJECT_NEGATIVE"
- if (flags ~ " UInteger ") result = result " | CL_UINTEGER"
- if (flags ~ " Undocumented ") result = result " | CL_UNDOCUMENTED"
- if (flags ~ " Report ") result = result " | CL_REPORT"
+ 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("Warning", flags, " | CL_WARNING") \
+ test_flag("Optimization", flags, " | CL_OPTIMIZATION") \
+ test_flag("Report", flags, " | CL_REPORT")
sub( "^0 \\| ", "", result )
return result
}
-function var_args(flags)
+# If FLAGS includes a Var flag, return the name of the variable it specifies.
+# Return the empty string otherwise.
+function var_name(flags)
{
- if (flags !~ "Var\\(")
- return ""
- sub(".*Var\\(", "", flags)
- sub("\\).*", "", flags)
+ return nth_arg(0, opt_args("Var", flags))
+}
- return 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) != "")
}
-function var_name(flags)
+
+# Return true if the option described by FLAGS must have some state
+# associated with it.
+function needs_state_p(flags)
{
- s = var_args(flags)
- if (s == "")
- return "";
- sub( ",.*", "", s)
- return s
+ return flag_set_p("Target", flags)
}
-function var_set(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)
{
- s = var_args(flags)
- if (s !~ ",")
- return "0, 0"
- sub( "[^,]*,", "", s)
- return "1, " s
+ if (global_state_p(flags) || !needs_state_p(flags))
+ return ""
+ gsub ("[^A-Za-z0-9]", "_", name)
+ return "VAR_" name
}
-function var_ref(flags)
+
+# Return the type of variable that should be associated with the given flags.
+function var_type(flags)
{
- name = var_name(flags)
- if (name == "")
- return "0"
+ 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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