macros.pl

   1 #!/usr/bin/perl
   2 ## --------------------------------------------------------------------------
   3 ##
   4 ##   Copyright 1996-2009 The NASM Authors - All Rights Reserved
   5 ##   See the file AUTHORS included with the NASM distribution for
   6 ##   the specific copyright holders.
   7 ##
   8 ##   Redistribution and use in source and binary forms, with or without
   9 ##   modification, are permitted provided that the following
  10 ##   conditions are met:
  11 ##
  12 ##   * Redistributions of source code must retain the above copyright
  13 ##     notice, this list of conditions and the following disclaimer.
  14 ##   * Redistributions in binary form must reproduce the above
  15 ##     copyright notice, this list of conditions and the following
  16 ##     disclaimer in the documentation and/or other materials provided
  17 ##     with the distribution.
  18 ##
  19 ##     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  20 ##     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  21 ##     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  22 ##     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23 ##     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  24 ##     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25 ##     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26 ##     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27 ##     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28 ##     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29 ##     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30 ##     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  31 ##     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32 ##
  33 ## --------------------------------------------------------------------------
  34
  35 #
  36 # macros.pl   produce macros.c from standard.mac
  37 #
  38
  39 require 'phash.ph';
  40 require 'pptok.ph';
  41
  42 use bytes;
  43
  44 my $fname;
  45 my $line = 0;
  46 my $index      = 0;
  47 my $tasm_count = 0;
  48
  49 #
  50 # Print out a string as a character array
  51 #
  52 sub charcify(@) {
  53     my $l = '';
  54     my $c, $o;
  55     foreach $o (unpack("C*", join('',@_))) {
  56         $c = pack("C", $o);
  57         if ($o < 32 || $o > 126 || $c eq '"' || $c eq "\\") {
  58             $l .= sprintf("%3d,", $o);
  59         } else {
  60             $c =~ s/\'/\\'/;    # << sanitize single quote.
  61             $l .= "\'".$c."\',";
  62         }
  63     }
  64     return $l;
  65 }
  66
  67
  68 #
  69 # Generate macros.c
  70 #
  71 open(OUT,"> macros.c\0") or die "unable to open macros.c\n";
  72
  73 print OUT "/*\n";
  74 print OUT " * Do not edit - this file auto-generated by macros.pl from:\n";
  75 print OUT " *   ", join("\n *   ", @ARGV), "\n";
  76 print OUT " */\n";
  77 print OUT "\n";
  78 print OUT "#include \"tables.h\"\n";
  79 print OUT "#include \"nasmlib.h\"\n";
  80 print OUT "#include \"hashtbl.h\"\n";
  81 print OUT "#include \"output/outform.h\"\n";
  82 print OUT "\n";
  83 print OUT "#if 1\n";
  84 print OUT "const unsigned char nasm_stdmac[] = {";
  85
  86 my $npkg = 0;
  87 my @pkg_list   = ();
  88 my %pkg_number = ();
  89 my $pkg;
  90 my @out_list   = ();
  91 my $outfmt;
  92 my $lastname;
  93 my $z;
  94
  95 foreach $fname ( @ARGV ) {
  96     open(INPUT,"< $fname\0") or die "$0: $fname: $!\n";
  97     while (<INPUT>) {
  98         $line++;
  99         chomp;
 100         while (/^(.*)\\$/) {
 101             $_ = $1;
 102             $_ .= <INPUT>;
 103             chomp;
 104             $line++;
 105         }
 106         if (m/^\s*\*END\*TASM\*MACROS\*\s*$/) {
 107             $tasm_count = $index;
 108             print OUT "    /* End of TASM macros */\n";
 109         } elsif (m/^OUT:\s*(.*\S)\s*$/) {
 110             undef $pkg;
 111             my @out_alias = split(/\s+/, $1);
 112             printf OUT "        /* %4d */ 0\n", $index++;
 113             print OUT "};\n#endif\n";
 114             $index = 0;
 115             print OUT "\n";
 116             my $pfx = '#if';
 117             foreach my $al (@out_alias) {
 118                 print OUT $pfx, " defined(OF_\U${al}\E)";
 119                 $pfx = ' ||';
 120             }
 121             printf OUT "\nconst unsigned char %s_stdmac[] = {\n", $out_alias[0];
 122             print  OUT "    /* From $fname */\n";
 123             $lastname = $fname;
 124             push(@out_list, $out_alias[0]);
 125             $out_index{$out_alias[0]} = $index;
 126         } elsif (m/^USE:\s*(\S+)\s*$/) {
 127             $pkg = $1;
 128             if (defined($pkg_number{$pkg})) {
 129                 die "$0: $fname: duplicate package: $pkg\n";
 130             }
 131             printf OUT "        /* %4d */ 0\n", $index++;
 132             print OUT "};\n#endif\n";
 133             $index = 0;
 134             print OUT "\n#if 1\n";
 135             printf OUT "static const unsigned char nasm_stdmac_%s[] = {\n", $pkg;
 136             print  OUT "    /* From $fname */\n";
 137             $lastname = $fname;
 138             push(@pkg_list, $pkg);
 139             $pkg_number{$pkg} = $npkg++;
 140             $z = pack("C", $pptok_hash{'%define'}+128)."__USE_\U$pkg\E__";
 141             printf OUT "        /* %4d */ %s0,\n", $index, charcify($z);
 142             $index += length($z)+1;
 143         } elsif (m/^\s*((\s*([^\"\';\s]+|\"[^\"]*\"|\'[^\']*\'))*)\s*(;.*)?$/) {
 144             my $s1, $s2, $pd, $ws;
 145             $s1 = $1;
 146             $s2 = '';
 147             while ($s1 =~ /(\%[a-zA-Z_][a-zA-Z0-9_]*)((\s+)(.*)|)$/) {
 148                 $s2 .= "$'";
 149                 $pd = $1;
 150                 $ws = $3;
 151                 $s1 = $4;
 152                 if (defined($pptok_hash{$pd}) &&
 153                     $pptok_hash{$pd} <= 127) {
 154                     $s2 .= pack("C", $pptok_hash{$pd}+128);
 155                 } else {
 156                     $s2 .= $pd.$ws;
 157                 }
 158             }
 159             $s2 .= $s1;
 160             if (length($s2) > 0) {
 161                 if ($lastname ne $fname) {
 162                     print OUT "\n    /* From $fname */\n";
 163                     $lastname = $fname;
 164                 }
 165                 printf OUT "        /* %4d */ %s0,\n",
 166                     $index, charcify($s2);
 167                 $index += length($s2)+1;
 168             }
 169         } else {
 170             die "$fname:$line:  error unterminated quote";
 171         }
 172     }
 173     close(INPUT);
 174 }
 175 printf OUT "        /* %4d */ 0\n};\n#endif\n\n", $index++;
 176 print OUT "const unsigned char * const nasm_stdmac_after_tasm = ",
 177     "&nasm_stdmac[$tasm_count];\n\n";
 178
 179 my @hashinfo = gen_perfect_hash(\%pkg_number);
 180 if (!@hashinfo) {
 181     die "$0: no hash found\n";
 182 }
 183 # Paranoia...
 184 verify_hash_table(\%pkg_number, \@hashinfo);
 185 my ($n, $sv, $g) = @hashinfo;
 186 die if ($n & ($n-1));
 187
 188 print OUT "const unsigned char *nasm_stdmac_find_package(const char *package)\n";
 189 print OUT "{\n";
 190 print OUT "    static const struct {\n";
 191 print OUT "         const char *package;\n";
 192 print OUT "         const unsigned char *macros;\n";
 193 print OUT "    } packages[$npkg] = {\n";
 194 foreach $pkg (@pkg_list) {
 195     printf OUT "        { \"%s\", nasm_stdmac_%s },\n",
 196         $pkg, $pkg;
 197 }
 198 print OUT "    };\n";
 199
 200 # Put a large value in unused slots.  This makes it extremely unlikely
 201 # that any combination that involves unused slot will pass the range test.
 202 # This speeds up rejection of unrecognized tokens, i.e. identifiers.
 203 print OUT "#define UNUSED 16383\n";
 204
 205 print OUT "    static const int16_t hash1[$n] = {\n";
 206 for ($i = 0; $i < $n; $i++) {
 207     my $h = ${$g}[$i*2+0];
 208     print OUT "        ", defined($h) ? $h : 'UNUSED', ",\n";
 209 }
 210 print OUT "    };\n";
 211
 212 print OUT "    static const int16_t hash2[$n] = {\n";
 213 for ($i = 0; $i < $n; $i++) {
 214     my $h = ${$g}[$i*2+1];
 215     print OUT "        ", defined($h) ? $h : 'UNUSED', ",\n";
 216 }
 217 print OUT "    };\n";
 218
 219 print OUT  "    uint32_t k1, k2;\n";
 220 print OUT  "    uint64_t crc;\n";
 221 # For correct overflow behavior, "ix" should be unsigned of the same
 222 # width as the hash arrays.
 223 print OUT  "    uint16_t ix;\n";
 224 print OUT  "\n";
 225
 226 printf OUT "    crc = crc64i(UINT64_C(0x%08x%08x), package);\n",
 227     $$sv[0], $$sv[1];
 228 print  OUT "    k1 = (uint32_t)crc;\n";
 229 print  OUT "    k2 = (uint32_t)(crc >> 32);\n";
 230 print  OUT "\n";
 231 printf OUT "    ix = hash1[k1 & 0x%x] + hash2[k2 & 0x%x];\n", $n-1, $n-1;
 232 printf OUT "    if (ix >= %d)\n", scalar(@pkg_list);
 233 print OUT  "        return NULL;\n";
 234 print OUT  "\n";
 235 print OUT  "    if (nasm_stricmp(packages[ix].package, package))\n";
 236 print OUT  "        return NULL;\n";
 237 print OUT  "\n";
 238 print OUT  "    return packages[ix].macros;\n";
 239 print OUT  "}\n";
 240
 241 close(OUT);