gcc/opt-functions.awk

   1 #  Copyright (C) 2003,2004 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 2, 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; if not, write to the Free Software
  17 # Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 # Some common subroutines for use by opt[ch]-gen.awk.
  20
  21 # If FLAGS contains a "NAME(...argument...)" flag, return the value
  22 # of the argument.  Return the empty string otherwise.
  23 function opt_args(name, flags)
  24 {
  25         flags = " " flags
  26         if (flags !~ " " name "\\(")
  27                 return ""
  28         sub(".* " name "\\(", "", flags)
  29         sub("\\).*", "", flags)
  30
  31         return flags
  32 }
  33
  34 # Return the Nth comma-separated element of S.  Return the empty string
  35 # if S does not contain N elements.
  36 function nth_arg(n, s)
  37 {
  38         while (n-- > 0) {
  39                 if (s !~ ",")
  40                         return ""
  41                 sub("[^,]*, *", "", s)
  42         }
  43         sub(",.*", "", s)
  44         return s
  45 }
  46
  47 # Return a bitmask of CL_* values for option flags FLAGS.
  48 function switch_flags (flags)
  49 {
  50         flags = " " flags " "
  51         result = "0"
  52         for (j = 0; j < n_langs; j++) {
  53                 regex = " " langs[j] " "
  54                 gsub ( "\\+", "\\+", regex )
  55                 if (flags ~ regex)
  56                         result = result " | " macros[j]
  57         }
  58         if (flags ~ " Common ") result = result " | CL_COMMON"
  59         if (flags ~ " Target ") result = result " | CL_TARGET"
  60         if (flags ~ " Joined ") result = result " | CL_JOINED"
  61         if (flags ~ " JoinedOrMissing ") \
  62             result = result " | CL_JOINED | CL_MISSING_OK"
  63         if (flags ~ " Separate ") result = result " | CL_SEPARATE"
  64         if (flags ~ " RejectNegative ") result = result " | CL_REJECT_NEGATIVE"
  65         if (flags ~ " UInteger ") result = result " | CL_UINTEGER"
  66         if (flags ~ " Undocumented ") result = result " | CL_UNDOCUMENTED"
  67         if (flags ~ " Report ") result = result " | CL_REPORT"
  68         sub( "^0 \\| ", "", result )
  69         return result
  70 }
  71
  72 # If FLAGS includes a Var flag, return the name of the variable it specifies.
  73 # Return the empty string otherwise.
  74 function var_name(flags)
  75 {
  76         return nth_arg(0, opt_args("Var", flags))
  77 }
  78
  79 # Given that an option has flags FLAGS, return an initializer for the
  80 # "var_cond" and "var_value" fields of its cl_options[] entry.
  81 function var_set(flags)
  82 {
  83         s = nth_arg(1, opt_args("Var", flags))
  84         if (s != "")
  85                 return "CLVC_EQUAL, " s
  86         s = opt_args("Mask", flags);
  87         if (s != "")
  88                 return "CLVC_BIT_SET, MASK_" s
  89         s = nth_arg(0, opt_args("InverseMask", flags));
  90         if (s != "")
  91                 return "CLVC_BIT_CLEAR, MASK_" s
  92         return "CLVC_BOOLEAN, 0"
  93 }
  94
  95 # Given that an option has flags FLAGS, return an initializer for the
  96 # "flag_var" field of its cl_options[] entry.
  97 function var_ref(flags)
  98 {
  99         name = var_name(flags)
 100         if (name != "")
 101                 return "&" name
 102         if (opt_args("Mask", flags) != "")
 103                 return "&target_flags"
 104         if (opt_args("InverseMask", flags) != "")
 105                 return "&target_flags"
 106         return "0"
 107 }