#!/usr/bin/perl -w
# NAME: listunres.pl
# AIM: Scan a MSVC build log ouput and list unresolved items, by some order
# 21/12/2013 geoff mclane http://geoffair.net/mperl
use strict;
use warnings;
use File::Basename;  # split path ($name,$dir,$ext) = fileparse($file [, qr/\.[^.]*/] )
use Cwd;
my $os = $^O;
my $perl_dir = '/home/geoff/bin';
my $PATH_SEP = '/';
my $temp_dir = '/tmp';
if ($os =~ /win/i) {
    $perl_dir = 'C:\GTools\perl';
    $temp_dir = $perl_dir;
    $PATH_SEP = "\\";
}
unshift(@INC, $perl_dir);
require 'lib_utils.pl' or die "Unable to load 'lib_utils.pl' Check paths in \@INC...\n";
# log file stuff
our ($LF);
my $pgmname = $0;
if ($pgmname =~ /(\\|\/)/) {
    my @tmpsp = split(/(\\|\/)/,$pgmname);
    $pgmname = $tmpsp[-1];
}
my $outfile = $temp_dir.$PATH_SEP."temp.$pgmname.txt";
open_log($outfile);

# user variables
my $VERS = "0.0.1 2013-12-21";
my $load_log = 0;
my $in_file = '';
my $verbosity = 0;
my $out_file = '';

# ### DEBUG ###
my $debug_on = 0;
my $def_file = 'F:\FG\18\build-gdal\bldlog-6.txt';

### program variables
my @warnings = ();
my $cwd = cwd();

sub VERB1() { return $verbosity >= 1; }
sub VERB2() { return $verbosity >= 2; }
sub VERB5() { return $verbosity >= 5; }
sub VERB9() { return $verbosity >= 9; }

sub show_warnings($) {
    my ($val) = @_;
    if (@warnings) {
        prt( "\nGot ".scalar @warnings." WARNINGS...\n" );
        foreach my $itm (@warnings) {
           prt("$itm\n");
        }
        prt("\n");
    } else {
        prt( "\nNo warnings issued.\n\n" ) if (VERB9());
    }
}

sub pgm_exit($$) {
    my ($val,$msg) = @_;
    if (length($msg)) {
        $msg .= "\n" if (!($msg =~ /\n$/));
        prt($msg);
    }
    show_warnings($val);
    close_log($outfile,$load_log);
    exit($val);
}


sub prtw($) {
   my ($tx) = shift;
   $tx =~ s/\n$//;
   prt("$tx\n");
   push(@warnings,$tx);
}

sub get_first_quote($) {
    my $txt = shift;
    my $len = length($txt);
    my ($i,$ch);
    my $ntxt = '';
    for ($i = 0; $i < $len; $i++) {
        $ch = substr($txt,$i,1);
        if ($i == 0) {
            if ($ch ne '"') {
                return $txt;
            }
            next;
        } elsif ($ch eq '"') {
            last;
        }
        $ntxt .= $ch;
    }
    $ntxt =~ s/^public:\s+//;
    return $ntxt;
}

sub get_value_before_brackets($) {
    my $txt = shift;
    my $len = length($txt);
    my ($i,$ch);
    my $ntxt = '';
    for ($i = 0; $i < $len; $i++) {
        $ch = substr($txt,$i,1);
        if ($ch eq '(') {
            last;
        } elsif ($ch =~ /\s/) {
            $ntxt = '';
        } else {
            $ntxt .= $ch;
        }
    }
    if ($ntxt =~ /^(\w+)::/) {
        my @arr = split("::",$ntxt);
        $ntxt = $arr[0].'::'.$arr[1];
    }
    #$ntxt =~ s/^_//;
    return $ntxt;
}

sub process_in_file($) {
    my ($inf) = @_;
    if (! open INF, "<$inf") {
        pgm_exit(1,"ERROR: Unable to open file [$inf]\n"); 
    }
    my @lines = <INF>;
    close INF;
    my $lncnt = scalar @lines;
    prt("Processing $lncnt lines, from [$inf]...\n");
    my ($line,$inc,$lnn,$inc2,$len,$unres);
    $lnn = 0;
    my %unresolved = ();
    foreach $line (@lines) {
        $lnn++;
        chomp $line;
        $line = trim_all($line);
        $len = length($line);
        next if ($len == 0);
        if ($line =~ /\s+unresolved\s+external\s+symbol\s+(.+)$/) {
            $inc = $1;
            if ($inc =~ /^(\w+)\s+referenced\s+in\s+function\s+/) {
                $inc2 = $1;
                prt("$lnn: $inc2 (RIF)\n") if (VERB5());
                $unres = $inc2;
                $unres =~ s/^_//;
                if (defined $unresolved{$unres}) {
                    $unresolved{$unres}++;
                } else {
                    $unresolved{$unres} = 1;
                }
            } else {
                if ($inc =~ /^(.+)\s+referenced\s+in\s+function\s+/) {
                    $inc = $1;
                    $inc = get_first_quote($inc);
                    $unres = get_value_before_brackets($inc);
                    prt("$lnn: $unres [$inc] (FQ)\n") if (VERB5());
                    if (defined $unresolved{$unres}) {
                        $unresolved{$unres}++;
                    } else {
                        $unresolved{$unres} = 1;
                    }
                } else {
                    $inc = get_first_quote($inc);
                    $unres = get_value_before_brackets($inc);
                    prt("$lnn: $unres [$inc] (NRIF)\n") if (VERB5());
                    if (defined $unresolved{$unres}) {
                        $unresolved{$unres}++;
                    } else {
                        $unresolved{$unres} = 1;
                    }
                }
            }
        }
    }
    my @arr = sort keys %unresolved;
    $len = scalar @arr;
    prt("List of $len unresolved externals...\n");
    my $max = 0;
    foreach $unres (@arr) {
        $len = $unresolved{$unres};
        $max = $len if ($len > $max);
    }
    $inc = 1;
    while ($inc <= $max) {
        foreach $unres (@arr) {
            $len = $unresolved{$unres};
            prt("$unres $len\n") if ($len == $inc);
        }
        $inc++;
    }
    $len = scalar @arr;
    prt("Listed $len unresolved externals...\n");
}

#########################################
### MAIN ###
parse_args(@ARGV);
process_in_file($in_file);
pgm_exit(0,"");
########################################

sub need_arg {
    my ($arg,@av) = @_;
    pgm_exit(1,"ERROR: [$arg] must have a following argument!\n") if (!@av);
}

sub parse_args {
    my (@av) = @_;
    my ($arg,$sarg);
    while (@av) {
        $arg = $av[0];
        if ($arg =~ /^-/) {
            $sarg = substr($arg,1);
            $sarg = substr($sarg,1) while ($sarg =~ /^-/);
            if (($sarg =~ /^h/i)||($sarg eq '?')) {
                give_help();
                pgm_exit(0,"Help exit(0)");
            } elsif ($sarg =~ /^v/) {
                if ($sarg =~ /^v.*(\d+)$/) {
                    $verbosity = $1;
                } else {
                    while ($sarg =~ /^v/) {
                        $verbosity++;
                        $sarg = substr($sarg,1);
                    }
                }
                prt("Verbosity = $verbosity\n") if (VERB1());
            } elsif ($sarg =~ /^l/) {
                if ($sarg =~ /^ll/) {
                    $load_log = 2;
                } else {
                    $load_log = 1;
                }
                prt("Set to load log at end. ($load_log)\n") if (VERB1());
            } elsif ($sarg =~ /^o/) {
                need_arg(@av);
                shift @av;
                $sarg = $av[0];
                $out_file = $sarg;
                prt("Set out file to [$out_file].\n") if (VERB1());
            } else {
                pgm_exit(1,"ERROR: Invalid argument [$arg]! Try -?\n");
            }
        } else {
            $in_file = $arg;
            prt("Set input to [$in_file]\n") if (VERB1());
        }
        shift @av;
    }

    if ($debug_on) {
        prtw("WARNING: DEBUG is ON!\n");
        if ((length($in_file) ==  0) && $debug_on) {
            $in_file = $def_file;
            prt("Set DEFAULT input to [$in_file]\n");
        }
    }
    if (length($in_file) ==  0) {
        pgm_exit(1,"ERROR: No input files found in command!\n");
    }
    if (! -f $in_file) {
        pgm_exit(1,"ERROR: Unable to find in file [$in_file]! Check name, location...\n");
    }
}

sub give_help {
    prt("$pgmname: version $VERS\n");
    prt("Usage: $pgmname [options] in-file\n");
    prt("Options:\n");
    prt(" --help  (-h or -?) = This help, and exit 0.\n");
    prt(" --verb[n]     (-v) = Bump [or set] verbosity. def=$verbosity\n");
    prt(" --load        (-l) = Load LOG at end. ($outfile)\n");
    prt(" --out <file>  (-o) = Write output to this file.\n");
}

# eof - template.pl