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dpurdie |
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###############################################################################
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# Codestriker: Copyright (c) 2001, 2002, 2003 David Sitsky.
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# All rights reserved.
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# sits@users.sourceforge.net
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#
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# This program is free software; you can redistribute it and modify it under
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# the terms of the GPL.
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# Parser object for reading VSS (Visual Source Safe) diffs.
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package Codestriker::FileParser::VssDiff;
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use strict;
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use Codestriker::FileParser::BasicDiffUtils;
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# Return the array of filenames, revision number, linenumber, whether its
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# binary or not, and the diff text.
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# Return () if the file can't be parsed, meaning it is in another format.
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sub parse ($$$) {
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my ($type, $fh, $repository) = @_;
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# Array of results found.
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my @result = ();
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my $line = <$fh>;
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while (defined($line)) {
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# Values associated with the diff.
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my $revision;
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my $filename;
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my $repmatch;
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# Skip whitespace.
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while (defined($line) &&
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($line =~ /^\s*$/o || $line =~ /^Version not found/o)) {
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$line = <$fh>;
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}
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return @result unless defined $line;
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# For VSS diffs, the start of the diff block is the "Diffing:" line
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# which contains the filename and version number. Some diffs may
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# not contain the version number for us.
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if ($line =~ /^Diffing: (.*);(.+)$/o) {
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$filename = $1;
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$revision = $2;
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$repmatch = 1;
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} elsif ($line =~ /^Diffing: (.*)$/o) {
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$filename = $1;
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$revision = $Codestriker::PATCH_REVISION;
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$repmatch = 0;
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} else {
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# Some other weird format.
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return ();
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}
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# The next line will be the "Against:" line, followed by a blank line.
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$line = <$fh>;
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return () unless defined $line && $line =~ /^Against:/o;
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$line = <$fh>;
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return () unless defined $line && $line =~ /^\s*$/o;
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# The next part of the diff will be the old style diff format, or
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# possibly "No differences." if there are no differences.
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$line = <$fh>;
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if ($line !~ /^No differences\./o) {
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my $chunk;
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do
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{
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my $leading_context = '';
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my $leading_context_line_count = 0;
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my $trailing_context = '';
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my $trailing_context_line_count = 0;
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if ($line =~ /^\*\*\*\*\*\*\*\*/o ||
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$line =~ /^ /o) {
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# Need to record some leading context.
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$line = <$fh> if $line =~ /^\*\*\*\*\*\*\*\*/o;
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while ($line =~ /^ (.*)$/o) {
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$leading_context .= "$1\n";
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$leading_context_line_count++;
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$line = <$fh>;
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}
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}
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$chunk = Codestriker::FileParser::BasicDiffUtils
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->read_diff_text($fh, $line, $filename, $revision,
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$repmatch);
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if (defined $chunk) {
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# Check for trailing context.
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$line = <$fh>;
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while (defined $line && $line =~ /^ (.*)$/o) {
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$trailing_context .= "$1\n";
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$trailing_context_line_count++;
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$line = <$fh>;
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}
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# Adjust the chunk accordingly with the leading and
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# trailing context.
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if ($leading_context_line_count > 0) {
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$chunk->{old_linenumber} -= $leading_context_line_count;
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$chunk->{new_linenumber} -= $leading_context_line_count;
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$chunk->{text} = $leading_context . $chunk->{text};
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}
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if ($trailing_context_line_count > 0) {
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$chunk->{text} .= $trailing_context;
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}
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push @result, $chunk;
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}
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} while (defined $chunk && defined $line);
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}
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# Read the next line.
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$line = <$fh> if defined $line;
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}
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# Return the found diff chunks.
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return @result;
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}
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1;
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