#!/usr/pkg/bin/perl -w
# asm_count - count physical lines of code in Assembly programs.
# Usage: asm_count [-f file] [list_of_files]
#  file: file with a list of files to count (if "-", read list from stdin)
#  list_of_files: list of files to count
#  -f file or list_of_files can be used, or both
# This is a trivial/naive program.

# For each file, it looks at the contents to heuristically determine
# if C comments are permitted and what the "comment" character is.
# If /* and */ are in the file, then C comments are permitted.
# The punctuation mark that starts the most lines must be the comment
# character (but ignoring "/" if C comments are allowed, and
# ignoring '#' if cpp commands appear to be used)

# This is part of SLOCCount, a toolsuite that counts
# source lines of code (SLOC).
# Copyright (C) 2001-2004 David A. Wheeler.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
# 
# To contact David A. Wheeler, see his website at:
#  http://www.dwheeler.com.



$total_sloc = 0;

# Do we have "-f" (read list of files from second argument)?
if (($#ARGV >= 1) && ($ARGV[0] eq "-f")) {
  # Yes, we have -f
  if ($ARGV[1] eq "-") {
    # The list of files is in STDIN
    while (<STDIN>) {
      chomp ($_);
      &count_file ($_);
    }
  } else {
    # The list of files is in the file $ARGV[1]
    open (FILEWITHLIST, $ARGV[1]) || die "Error: Could not open $ARGV[1]\n";
    while (<FILEWITHLIST>) {
      chomp ($_);
      &count_file ($_);
    }
    close FILEWITHLIST;
  }
  shift @ARGV; shift @ARGV;
}
# Process all (remaining) arguments as file names
while ($file = shift @ARGV) {
  &count_file ($file);
}

print "Total:\n";
print "$total_sloc\n";

sub count_file {
  my ($file) = @_;
  # First, use heuristics to determine the comment char and if it uses C comments
  $found_c_start = 0;
  $found_c_end = 0;
  $cpp_suspicious = 0;
  $cpp_likely = 0;
  $cpp_used = 0;
  %count = ();
  if ($file eq "") {
    *CURRENTFILE = *STDIN
  } else {
    open(CURRENTFILE, "<$file");
  }
  while (<CURRENTFILE>) {
    if (m!\/\*!) { $found_c_start++;}
    if (m!\*\/!) { $found_c_end++;}
    if ( (m!^#\s*define\s!) || (m!^#\s*else!)) {$cpp_suspicious++;}
    if ( (m!^#\s*ifdef\s!) || (m!^#\s*endif!) || (m!#\s*include!)) {$cpp_likely++;}
    if (m/^\s*([;!\/#\@\|\*])/) { $count{$1}++; }  # Found a likely comment char.
  }
  # Done examing file, let's figure out the parameters.
  if ($found_c_start && $found_c_end) {
    $ccomments = 1;
    $count{'/'} = 0;
    # $count{'*'} = 0;  # Do this to ignore '*' if C comments are used.
  } else {
    $ccomments = 0;
  }
  if (($cpp_suspicious > 2) || ($cpp_likely >= 1)) {
    $cpp_used = 1;
    $count{'#'} = 0;
  } else {
    $cpp_used = 0;
  }
  $likeliest = ';';
  $likeliest_count = 0;
  foreach $i (keys(%count)) {
    # print "DEBUG: key=$i count=$count{$i}\n";
    if ($count{$i} > $likeliest_count) {
      $likeliest = $i;
      $likeliest_count = $count{$i};
    }
  }
  # print "DEBUG: likeliest = $likeliest\n";
  $commentchar=$likeliest;
  close(CURRENTFILE);

  # Now count SLOC.
  $sloc = 0;
  $isincomment = 0;
  open(CURRENTFILE, "<$file");
  while (<CURRENTFILE>) {
    # We handle C comments first, so that if an EOL-comment
    # occurs inside a C comment, it's ignored.
    if ($ccomments) {
      # Handle C /* */ comments; this will get fooled if they're in strings,
      # but that would be rare in assembly.
      while ( (m!\/\*!) || (m!\*\/!)) {  # While unprocessed C comment.
	if ($isincomment) {
	  s!.*?\*\/.*!!;
	  $isincomment = 0;
	} else {           # Not in C comment, but have end comment marker.
	  if (! m/\/\*/) {  # Whups, there's no starting marker!
	    print STDERR "Warning: file $file line $. has unmatched comment end\n";
	    # Get us back to a plausible state:
	    s/.*//; # Destroy everything
	      $isincomment = 0;
	  } else {
	    if (! s!\/\*.*?\*\/!!) { # Try to delete whole comment.
              # We couldn't delete whole comment.  Delete what's there.
              s!\/\*.*!!;
              $isincomment = 1;
	    }
	  }
	}
      }
    }  # End of handling C comments.
    # This requires $[ be unchanged.
    $locate_comment = index($_, $commentchar);
    if ($locate_comment >= 0) {  # We found a comment character, delete comment
       $_ = substr($_, 0, $locate_comment);
       # print "DEBUG New text: @",$_,"@\n";
    }
    # old: s/${commentchar}.*//;  # Delete leading comments.

    # FOR DEBUG: print "Finally isincomment=$isincomment line=$_\n";
    if ((! $isincomment) && (m/\S/)) {$sloc++;}
  }

  # End-of-file processing
  print "$sloc (commentchar=$commentchar C-comments=$ccomments) $file\n";
  $total_sloc += $sloc;
  $sloc = 0;
  if ($isincomment) {
    print STDERR "Missing comment close in file $file\n";
  }
}
