FreeBSD/Linux Kernel Cross Reference
sys/teken/gensequences

     #!/usr/bin/awk -f
     
     #-
     # Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
     # All rights reserved.
     #
     # Redistribution and use in source and binary forms, with or without
     # modification, are permitted provided that the following conditions
     # are met:
    # 1. Redistributions of source code must retain the above copyright
    #    notice, this list of conditions and the following disclaimer.
    # 2. Redistributions in binary form must reproduce the above copyright
    #    notice, this list of conditions and the following disclaimer in the
    #    documentation and/or other materials provided with the distribution.
    #
    # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
    # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
    # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    # SUCH DAMAGE.
    #
    # $FreeBSD$
    
    function die(msg) {
            print msg;
            exit 1;
    }
    
    function cchar(str) {
            if (str == "^[")
                    return "\\x1B";
            if (str == "SP")
                    return " ";
    
            return str;
    }
    
    function csequence(str) {
            if (str == "SP")
                    return " ";
    
            return str;
    }
    
    BEGIN {
    FS = "\t+"
    
    while (getline > 0) {
            if (NF == 0 || $1 ~ /^#/)
                    continue;
    
            if (NF != 3 && NF != 4)
                    die("Invalid line layout: " NF " columns");
    
            split($3, sequence, " +");
            nsequences = 0;
            for (s in sequence)
                    nsequences++;
    
            prefix = "";
            l_prefix_name[""] = "teken_state_init";
            for (i = 1; i < nsequences; i++) {
                    n = prefix csequence(sequence[i]);
                    l_prefix_parent[n] = prefix;
                    l_prefix_suffix[n] = sequence[i];
                    if (!l_prefix_name[n])
                            l_prefix_name[n] = "teken_state_" ++npr;
                    prefix = n;
            }
    
            suffix = sequence[nsequences];
            cmd = prefix suffix;
    
            # Fill lists
            if (l_cmd_name[cmd] != "")
                    die(cmd " already exists");
            l_cmd_prefix[cmd] = prefix;
            l_cmd_suffix[cmd] = suffix;
            l_cmd_args[cmd] = $4;
            l_cmd_abbr[cmd] = $1;
            l_cmd_name[cmd] = $2;
            l_cmd_c_name[cmd] = "teken_subr_" tolower($2);
            gsub(" ", "_", l_cmd_c_name[cmd]);
    
            if ($4 != "")
                    l_prefix_numbercmds[prefix]++;
    }
    
    print "/* Generated file. Do not edit. */";
    print "";
    
    for (p in l_prefix_name) {
            if (l_prefix_name[p] != "teken_state_init")
                   print "static teken_state_t     " l_prefix_name[p] ";";
   }
   
   for (p in l_prefix_name) {
           print "";
           print "/* '" p "' */";
           print "static void";
           print l_prefix_name[p] "(teken_t *t, teken_char_t c)";
           print "{";
   
           if (l_prefix_numbercmds[p] > 0) {
                   print "";
                   print "\tif (teken_state_numbers(t, c))";
                   print "\t\treturn;";
           }
   
           print "";
           print "\tswitch (c) {";
           for (c in l_cmd_prefix) {
                   if (l_cmd_prefix[c] != p)
                           continue;
   
                   print "\tcase '" cchar(l_cmd_suffix[c]) "': /* " l_cmd_abbr[c] ": " l_cmd_name[c] " */";
   
                   if (l_cmd_args[c] == "v") {
                           print "\t\t" l_cmd_c_name[c] "(t, t->t_curnum, t->t_nums);";
                   } else {
                           printf "\t\t%s(t", l_cmd_c_name[c];
                           split(l_cmd_args[c], args, " ");
                           for (a = 1; args[a] != ""; a++) {
                                   if (args[a] == "n")
                                           printf ", (t->t_curnum < %d || t->t_nums[%d] == 0) ? 1 : t->t_nums[%d]", a, (a - 1), (a - 1);
                                   else if (args[a] == "r")
                                           printf ", t->t_curnum < %d ? 0 : t->t_nums[%d]", a, (a - 1);
                                   else
                                           die("Invalid argument type: " args[a]);
                           }
                           print ");";
                   }
                   print "\t\tbreak;";
           }
           for (pc in l_prefix_parent) {
                   if (l_prefix_parent[pc] != p)
                           continue;
                   print "\tcase '" cchar(l_prefix_suffix[pc]) "':";
                   print "\t\tteken_state_switch(t, " l_prefix_name[pc] ");";
                   print "\t\treturn;";
           }
   
           print "\tdefault:";
           if (l_prefix_name[p] == "teken_state_init") {
                   print "\t\tteken_subr_regular_character(t, c);";
           } else {
                   print "\t\tteken_printf(\"Unsupported sequence in " l_prefix_name[p] ": %u\\n\", (unsigned int)c);";
           }
           print "\t\tbreak;";
   
           print "\t}";
   
           if (l_prefix_name[p] != "teken_state_init") {
                   print "";
                   print "\tteken_state_switch(t, teken_state_init);";
           }
           print "}";
   }
   
   }

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