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     my $space = 1;
  56     my $quote = 0;
  57
  58     foreach $o (unpack("C*", join('',@_))) {
  59         $c = pack("C", $o);
  60         if ($quote) {
  61             if ($o == $quote) {
  62                 $quote = 0;
  63             }
  64         } elsif ($c =~ /^[\'\"\`]$/) {
  65             $quote = $o;
  66         } else {
  67             if ($c =~ /\s/) {
  68                 next if ($space);
  69                 $o = 32;
  70                 $c = ' ';
  71                 $space = 1;
  72             } elsif ($o > 126) {
  73                 $space = 1;     # Implicit space after compacted directive
  74             } else {
  75                 $space = 0;
  76             }
  77         }
  78
  79         if ($o < 32 || $o > 126 || $c eq '"' || $c eq "\\") {
  80             $l .= sprintf("%3d,", $o);
  81         } else {
  82             $c =~ s/\'/\\'/;    # << sanitize single quote.
  83             $l .= "\'".$c."\',";
  84         }
  85     }
  86     return $l;
  87 }
  88
  89
  90 #
  91 # Generate macros.c
  92 #
  93 open(OUT,"> macros.c\0") or die "unable to open macros.c\n";
  94
  95 print OUT "/*\n";
  96 print OUT " * Do not edit - this file auto-generated by macros.pl from:\n";
  97 print OUT " *   ", join("\n *   ", @ARGV), "\n";
  98 print OUT " */\n";
  99 print OUT "\n";
 100 print OUT "#include \"tables.h\"\n";
 101 print OUT "#include \"nasmlib.h\"\n";
 102 print OUT "#include \"hashtbl.h\"\n";
 103 print OUT "#include \"output/outform.h\"\n";
 104 print OUT "\n";
 105 print OUT "#if 1\n";
 106 print OUT "const unsigned char nasm_stdmac[] = {";
 107
 108 my $npkg = 0;
 109 my @pkg_list   = ();
 110 my %pkg_number = ();
 111 my $pkg;
 112 my @out_list   = ();
 113 my $outfmt;
 114 my $lastname;
 115 my $z;
 116
 117 foreach $fname ( @ARGV ) {
 118     open(INPUT,"< $fname\0") or die "$0: $fname: $!\n";
 119     while (<INPUT>) {
 120         $line++;
 121         chomp;
 122         while (/^(.*)\\$/) {
 123             $_ = $1;
 124             $_ .= <INPUT>;
 125             chomp;
 126             $line++;
 127         }
 128         if (m/^\s*\*END\*TASM\*MACROS\*\s*$/) {
 129             $tasm_count = $index;
 130             print OUT "    /* End of TASM macros */\n";
 131         } elsif (m/^OUT:\s*(.*\S)\s*$/) {
 132             undef $pkg;
 133             my @out_alias = split(/\s+/, $1);
 134             printf OUT "        /* %4d */ 0\n", $index++;
 135             print OUT "};\n#endif\n";
 136             $index = 0;
 137             print OUT "\n";
 138             my $pfx = '#if';
 139             foreach my $al (@out_alias) {
 140                 print OUT $pfx, " defined(OF_\U${al}\E)";
 141                 $pfx = ' ||';
 142             }
 143             printf OUT "\nconst unsigned char %s_stdmac[] = {\n", $out_alias[0];
 144             print  OUT "    /* From $fname */\n";
 145             $lastname = $fname;
 146             push(@out_list, $out_alias[0]);
 147             $out_index{$out_alias[0]} = $index;
 148         } elsif (m/^USE:\s*(\S+)\s*$/) {
 149             $pkg = $1;
 150             if (defined($pkg_number{$pkg})) {
 151                 die "$0: $fname: duplicate package: $pkg\n";
 152             }
 153             printf OUT "        /* %4d */ 0\n", $index++;
 154             print OUT "};\n#endif\n";
 155             $index = 0;
 156             print OUT "\n#if 1\n";
 157             printf OUT "static const unsigned char nasm_stdmac_%s[] = {\n", $pkg;
 158             print  OUT "    /* From $fname */\n";
 159             $lastname = $fname;
 160             push(@pkg_list, $pkg);
 161             $pkg_number{$pkg} = $npkg++;
 162             $z = pack("C", $pptok_hash{'%define'}+128)."__USE_\U$pkg\E__";
 163             printf OUT "        /* %4d */ %s0,\n", $index, charcify($z);
 164             $index += length($z)+1;
 165         } elsif (m/^\s*((\s*([^\"\';\s]+|\"[^\"]*\"|\'[^\']*\'))*)\s*(;.*)?$/) {
 166             my $s1, $s2, $pd, $ws;
 167             $s1 = $1;
 168             $s2 = '';
 169             while ($s1 =~ /(\%[a-zA-Z_][a-zA-Z0-9_]*)((\s+)(.*)|)$/) {
 170                 $s2 .= "$'";
 171                 $pd = $1;
 172                 $ws = $3;
 173                 $s1 = $4;
 174                 if (defined($pptok_hash{$pd}) &&
 175                     $pptok_hash{$pd} <= 127) {
 176                     $s2 .= pack("C", $pptok_hash{$pd}+128);
 177                 } else {
 178                     $s2 .= $pd.$ws;
 179                 }
 180             }
 181             $s2 .= $s1;
 182             if (length($s2) > 0) {
 183                 if ($lastname ne $fname) {
 184                     print OUT "\n    /* From $fname */\n";
 185                     $lastname = $fname;
 186                 }
 187                 printf OUT "        /* %4d */ %s0,\n",
 188                     $index, charcify($s2);
 189                 $index += length($s2)+1;
 190             }
 191         } else {
 192             die "$fname:$line:  error unterminated quote";
 193         }
 194     }
 195     close(INPUT);
 196 }
 197 printf OUT "        /* %4d */ 0\n};\n#endif\n\n", $index++;
 198 print OUT "const unsigned char * const nasm_stdmac_after_tasm = ",
 199     "&nasm_stdmac[$tasm_count];\n\n";
 200
 201 my @hashinfo = gen_perfect_hash(\%pkg_number);
 202 if (!@hashinfo) {
 203     die "$0: no hash found\n";
 204 }
 205 # Paranoia...
 206 verify_hash_table(\%pkg_number, \@hashinfo);
 207 my ($n, $sv, $g) = @hashinfo;
 208 die if ($n & ($n-1));
 209
 210 print OUT "const unsigned char *nasm_stdmac_find_package(const char *package)\n";
 211 print OUT "{\n";
 212 print OUT "    static const struct {\n";
 213 print OUT "         const char *package;\n";
 214 print OUT "         const unsigned char *macros;\n";
 215 print OUT "    } packages[$npkg] = {\n";
 216 foreach $pkg (@pkg_list) {
 217     printf OUT "        { \"%s\", nasm_stdmac_%s },\n",
 218         $pkg, $pkg;
 219 }
 220 print OUT "    };\n";
 221
 222 # Put a large value in unused slots.  This makes it extremely unlikely
 223 # that any combination that involves unused slot will pass the range test.
 224 # This speeds up rejection of unrecognized tokens, i.e. identifiers.
 225 print OUT "#define UNUSED 16383\n";
 226
 227 print OUT "    static const int16_t hash1[$n] = {\n";
 228 for ($i = 0; $i < $n; $i++) {
 229     my $h = ${$g}[$i*2+0];
 230     print OUT "        ", defined($h) ? $h : 'UNUSED', ",\n";
 231 }
 232 print OUT "    };\n";
 233
 234 print OUT "    static const int16_t hash2[$n] = {\n";
 235 for ($i = 0; $i < $n; $i++) {
 236     my $h = ${$g}[$i*2+1];
 237     print OUT "        ", defined($h) ? $h : 'UNUSED', ",\n";
 238 }
 239 print OUT "    };\n";
 240
 241 print OUT  "    uint32_t k1, k2;\n";
 242 print OUT  "    uint64_t crc;\n";
 243 # For correct overflow behavior, "ix" should be unsigned of the same
 244 # width as the hash arrays.
 245 print OUT  "    uint16_t ix;\n";
 246 print OUT  "\n";
 247
 248 printf OUT "    crc = crc64i(UINT64_C(0x%08x%08x), package);\n",
 249     $$sv[0], $$sv[1];
 250 print  OUT "    k1 = (uint32_t)crc;\n";
 251 print  OUT "    k2 = (uint32_t)(crc >> 32);\n";
 252 print  OUT "\n";
 253 printf OUT "    ix = hash1[k1 & 0x%x] + hash2[k2 & 0x%x];\n", $n-1, $n-1;
 254 printf OUT "    if (ix >= %d)\n", scalar(@pkg_list);
 255 print OUT  "        return NULL;\n";
 256 print OUT  "\n";
 257 print OUT  "    if (nasm_stricmp(packages[ix].package, package))\n";
 258 print OUT  "        return NULL;\n";
 259 print OUT  "\n";
 260 print OUT  "    return packages[ix].macros;\n";
 261 print OUT  "}\n";
 262
 263 close(OUT);