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#!/usr/bin/perl
## Checks entries in the indra/newview/gpu_table.txt file against sample data
##
## Copyright (c) 2011, Linden Research, Inc.
##
## Permission is hereby granted, free of charge, to any person obtaining a copy
## of this software and associated documentation files (the "Software"), to deal
## in the Software without restriction, including without limitation the rights
## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
## copies of the Software, and to permit persons to whom the Software is
## furnished to do so, subject to the following conditions:
##
## The above copyright notice and this permission notice shall be included in
## all copies or substantial portions of the Software.
##
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
## AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
## THE SOFTWARE.

use English;
use Getopt::Long;

( $MyName = $0 ) =~ s|.*/||;
my $mini_HELP = "
  $MyName --gpu-table <gpu_table.txt> 
          [ --unrecognized-only ]
          [ --table-only ]
          [ <gpu-strings-file> ...]
  
  Checks for duplicates and invalid lines in the gpu_table.txt file.

  Unless the '--table-only' option is specified, it also tests the recognition of 
  values in the gpu-strings-files (or standard input if no files are given).  

  If the --unrecognized-only option is specified, then no output is produced for
  values that are matched, otherwise a line is output for each input line that
  describes the results of attempting to match the value on that line.
";

&GetOptions("help"              => \$Help,
            "gpu-table=s"       => \$GpuTable,
            "unrecognized-only" => \$UnrecognizedOnly,
            "table-only"        => \$TableOnly
    )
    || die "$mini_HELP";

if ($Help)
{
    print $mini_HELP;
    exit 0;
}

$ErrorsSeen = 0;

die "Must specify a --gpu-table <gpu_table.txt> value"
    unless $GpuTable;

open(GPUS, "<$GpuTable")
    || die "Failed to open gpu table '$GpuTable':\n\t$!\n";

# Parse the GPU table into these tables, indexed by the name
my %NameLine;       # name -> line number on which a given name was found (catches duplicate names)
my %RecognizerLine; # name -> line number on which a given name was found (catches duplicate names)
my %Name;           # recognizer -> name
my %Recognizer;     # name -> recognizer
my %Class;          # recognizer -> class
my %Supported;      # recognizer -> supported
my @InOrder;        # lowercased recognizers in file order - these are the ones really used to match

$Name{'UNRECOGNIZED'}      = 'UNRECOGNIZED';
$NameLine{'UNRECOGNIZED'}  = '(hard-coded)'; # use this for error messages in table parsing
$Class{'UNRECOGNIZED'}     = '';
$Supported{'UNRECOGNIZED'} = '';

while (<GPUS>)
{
    next if m|^//|;    # skip comments
    next if m|^\s*$|;  # skip blank lines

    chomp;
    my ($name, $regex, $class, $supported, $extra) = split('\t+');
    my $errsOnLine = $ErrorsSeen;
    if (!$name)
    {
        print STDERR "No name found on $GpuTable line $INPUT_LINE_NUMBER\n";
        $ErrorsSeen++;
    }
    elsif ( defined $NameLine{$name} )
    {
        print STDERR "Duplicate name '$name' on $GpuTable lines $NameLine{$name} and $INPUT_LINE_NUMBER:\n";
        print STDERR "     $NameLine{$name}: /$Recognizer{$name}/  $Supported{$Recognizer{$name}}  class $Class{$Recognizer{$name}}\n";
        print STDERR "     $INPUT_LINE_NUMBER: /$regex/  " . ($supported ? "supported" : "unsupported") .  " class $class - ignored\n";
        $ErrorsSeen++;
    }
    if (!$regex)
    {
        print STDERR "No recognizer found on $GpuTable line $INPUT_LINE_NUMBER\n";
        $ErrorsSeen++;
    }
    elsif ( defined $RecognizerLine{$regex} )
    {
        print STDERR "Duplicate recognizer /$regex/ found on $GpuTable lines $RecognizerLine{$regex} and $INPUT_LINE_NUMBER (ignored)\n";
        print STDERR "     $RecognizerLine{$regex}: name '$Name{$regex}'  $Supported{$regex}  class $Class{$regex}\n";
        print STDERR "     $INPUT_LINE_NUMBER: name '$name'  " . ($supported ? "supported" : "unsupported") .  "  class $class - ignored\n";
        $ErrorsSeen++;
    }
    if ($class !~ m/[0123]/)
    {
        print STDERR "Invalid class value '$class' on $GpuTable line $INPUT_LINE_NUMBER\n";
        $ErrorsSeen++;
    }
    if ($supported !~ m/[0123]/)
    {
        print STDERR "Invalid supported value '$supported' on $GpuTable line $INPUT_LINE_NUMBER\n";
        $ErrorsSeen++;
    }
    if ($extra)
    {
        print STDERR "Extra data '$extra' on $GpuTable line $INPUT_LINE_NUMBER\n";
        $ErrorsSeen++;
    }
    
    if ($errsOnLine == $ErrorsSeen) # no errors found on this line
    {
        $lcregex = $regex; # the real gpu table parser lowercases each recognizer
        push @InOrder,$lcregex;
        $NameLine{$name} = $INPUT_LINE_NUMBER;
        $RecognizerLine{$regex} = $INPUT_LINE_NUMBER;
        $Name{$regex} = $name;
        $Recognizer{$name} = $regex;
        $Class{$regex} = $class;
        $Supported{$regex} = $supported ? "supported" : "unsupported";
    }
}

close GPUS;

print STDERR "\n" if $ErrorsSeen;

exit $ErrorsSeen if $TableOnly;


my %RecognizedBy;
while (<>) # Loop over input lines
{
    chomp;
    my $lowerInput = $_;
    lc lowerInput;  # the real gpu table parser lowercases the input string
    my $recognizer;
    $RecognizedBy{$_} = 'UNRECOGNIZED';
    foreach $recognizer ( @InOrder ) # note early exit if recognized
    {
        if ( m/$recognizer/ )
        {
            $RecognizedBy{$_} = $recognizer;
            last; # exit recognizer loop
        }
    }
}

## Print results. 
## For each input, show supported or unsupported, the class, and the recognizer name
format STDOUT_TOP =
GPU String                                                                                               Supported?  Class  Recognizer
------------------------------------------------------------------------------------------------------   ----------- -----  ------------------------------------
.
format STDOUT =
@<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<...   @<<<<<<<<<<   @>   @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<...
$_, $Supported{$RecognizedBy{$_}},$Class{$RecognizedBy{$_}},$Name{$RecognizedBy{$_}}
.

foreach ( sort keys %RecognizedBy )
{
    write if ! $UnrecognizedOnly || $Name{$RecognizedBy{$_}} eq 'UNRECOGNIZED';
    $-++; # suppresses pagination
}

exit $ErrorsSeen;