csgo/cstrike15_src/tier1/generate_constructors.pl

#!perl

print `p4 edit ../public/tier1/utlstringtoken_generated_contructors.h`;

open( FOUT, ">../public/tier1/utlstringtoken_generated_contructors.h" ) || die "cant open output file";

print FOUT "//===== Copyright � 1996-2009, Valve Corporation, All rights reserved. ======//\n";
print FOUT "//\n";
print FOUT "// Purpose: inlines for compile-time hashing of constant strings\n";
print FOUT "//\n";
print FOUT "// $NoKeywords: \$\n";
print FOUT "//\n";
print FOUT "//===========================================================================//\n";
print FOUT "// DO NOT EDIT THIS FILE - IT IS GENERATED BY RUNNING GENERATE_CONSTRUCTORS.PL\n\n";

print FOUT "#define TOLOWERU( c ) ( ( uint32 ) ( ( ( c >= 'A' ) && ( c <= 'Z' ) )? c + 32 : c ) )\n";


# generate for lengths 1 to 30
for( $i = 1; $i < 30; $i++ )
  {
	$len = $i - 1;
	print FOUT "FORCEINLINE CUtlStringToken( const char ( \&str )[$i] )\n{\n";
	print FOUT "\tconst uint32 m = 0x5bd1e995;\n";
	print FOUT "\tuint32 h = STRINGTOKEN_MURMURHASH_SEED ^ $len;\n";
	$curpos = 0;
    print FOUT "\tuint32 k;\n" if ( $len >= 4 );
	print FOUT "\tconst int r = 24;\n" if ( $len >= 4 );
	while( $len >= 4)
	{
		print FOUT "\tk = TOLOWERU( str[ $curpos ] ) + ( TOLOWERU( str[ $curpos + 1 ] ) << 8 ) + ( TOLOWERU( str[ $curpos + 2 ] ) << 16 ) +";
        print FOUT "( TOLOWERU( str[ $curpos + 3 ] ) << 24 );\n";
        print FOUT "\tk *= m;\n";
	    print FOUT "\tk ^= k >> r;\n";
        print FOUT "\tk *= m;\n";
	    print FOUT "\th *= m;\n";
	    print FOUT "\th ^= k;\n";
		$curpos += 4;
		$len -= 4;
  }

  print FOUT "\th ^= TOLOWERU( str[ $curpos + 2 ] ) << 16;\n" if ( $len >= 3 );
  print FOUT "\th ^= TOLOWERU( str[ $curpos + 1 ] ) << 8;\n" if ( $len >= 2 );
  print FOUT "\th ^= TOLOWERU( str[ $curpos + 0 ] );\n" if ( $len >= 1 );
  print FOUT "\th *= m;\n" if ( $len >= 1 );
  print FOUT "\th ^= h >> 13;\n";
  print FOUT "\th *= m;\n";
  print FOUT "\th ^= h >> 15;\n";
	print FOUT "\tm_nHashCode = h;\n}\n\n";
}