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498 lines
13 KiB
Perl
498 lines
13 KiB
Perl
###############################################################################
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#
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# Package: NaturalDocs::ConfigFile
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#
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###############################################################################
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#
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# A package to manage Natural Docs' configuration files.
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#
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# Usage:
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#
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# - Only one configuration file can be managed with this package at a time. You must close the file before opening another
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# one.
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#
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###############################################################################
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# This file is part of Natural Docs, which is Copyright (C) 2003-2008 Greg Valure
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# Natural Docs is licensed under the GPL
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use strict;
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use integer;
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package NaturalDocs::ConfigFile;
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#
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# Topic: Format
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#
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# All configuration files are text files.
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#
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# > # [comment]
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#
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# Comments start with the # character.
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#
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# > Format: [version]
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#
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# All configuration files *must* have a format line as its first line containing content. Whitespace and comments are permitted
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# ahead of it.
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#
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# > [keyword]: [value]
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#
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# Keywords can only contain <CFChars>. Keywords are not case sensitive. Values can be anything and run until the end of
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# the line or a comment.
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#
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# > [value]
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#
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# Lines that don't start with a valid keyword format are considered to be all value.
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#
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# > [line] { [line] } [line]
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#
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# Files supporting brace groups (specified in <Open()>) may also have braces that can appear anywhere. It allows more than
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# one thing to appear per line, which isn't supported otherwise. Consequently, values may not have braces.
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#
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#
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# Type: CFChars
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#
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# The characters that can appear in configuration file keywords and user-defined element names: letters, numbers, spaces,
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# dashes, slashes, apostrophes, and periods.
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#
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# Although the list above is exhaustive, it should be noted that you especially can *not* use colons (messes up keyword: value
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# sequences) commas (messes up item, item, item list sequences) and hashes (messes up comment detection.)
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#
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# You can search the source code for [CFChars] to find all the instances where this definition is used.
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#
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###############################################################################
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# Group: Variables
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#
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# handle: CONFIG_FILEHANDLE
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#
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# The file handle used for the configuration file.
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#
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#
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# string: file
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#
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# The <FileName> for the current configuration file being parsed.
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#
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my $file;
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#
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# array: errors
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#
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# An array of errors added by <AddError()>. Every odd entry is the line number, and every even entry following is the
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# error message.
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#
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my @errors;
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#
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# var: lineNumber
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#
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# The current line number for the configuration file.
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#
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my $lineNumber;
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#
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# bool: hasBraceGroups
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#
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# Whether the file has brace groups or not.
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#
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my $hasBraceGroups;
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#
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# array: virtualLines
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#
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# An array of virtual lines if a line from the file contained more than one.
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#
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# Files with brace groups may have more than one virtual line per actual file line, such as "Group: A { Group: B". When that
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# happens, any extra virtual lines are put into here so they can be returned on the next call.
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#
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my @virtualLines;
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###############################################################################
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# Group: Functions
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#
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# Function: Open
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#
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# Opens a configuration file for parsing and returns the format <VersionInt>.
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#
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# Parameters:
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#
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# file - The <FileName> to parse.
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# hasBraceGroups - Whether the file supports brace groups or not. If so, lines with braces will be split apart behind the
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# scenes.
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#
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# Returns:
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#
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# The <VersionInt> of the file, or undef if the file doesn't exist.
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#
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sub Open #(file, hasBraceGroups)
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{
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my $self;
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($self, $file, $hasBraceGroups) = @_;
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@errors = ( );
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# It will be incremented to one when the first line is read from the file.
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$lineNumber = 0;
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open(CONFIG_FILEHANDLE, '<' . $file) or return undef;
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# Get the format line.
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my ($keyword, $value, $comment) = $self->GetLine();
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if ($keyword eq 'format')
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{ return NaturalDocs::Version->FromString($value); }
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else
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{ die "The first content line in " . $file . " must be the Format: line.\n"; };
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};
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#
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# Function: Close
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#
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# Closes the current configuration file.
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#
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sub Close
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{
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my $self = shift;
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close(CONFIG_FILEHANDLE);
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};
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#
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# Function: GetLine
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#
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# Returns the next line containing content, or an empty array if none.
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#
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# Returns:
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#
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# Returns the array ( keyword, value, comment ), or an empty array if none. All tabs will be converted to spaces, and all
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# whitespace will be condensed into a single space.
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#
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# keyword - The keyword part of the line, if any. Is converted to lowercase and doesn't include the colon. If the file supports
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# brace groups, opening and closing braces will be returned as keywords.
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# value - The value part of the line, minus any whitespace. Keeps its original case.
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# comment - The comment following the line, if any. This includes the # symbol and a leading space if there was
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# any whitespace, since it may be significant. Otherwise undef. Used for lines where the # character needs to be
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# accepted as part of the value.
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#
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sub GetLine
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{
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my $self = shift;
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my ($line, $comment);
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# Get the next line with content.
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do
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{
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# Get the next line.
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my $isFileLine;
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if (scalar @virtualLines)
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{
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$line = shift @virtualLines;
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$isFileLine = 0;
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}
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else
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{
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$line = <CONFIG_FILEHANDLE>;
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$lineNumber++;
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if (!defined $line)
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{ return ( ); };
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::XChomp(\$line);
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# Condense spaces and tabs into a single space.
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$line =~ tr/\t / /s;
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$isFileLine = 1;
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};
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# Split off the comment.
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if ($line =~ /^(.*?)( ?#.*)$/)
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{ ($line, $comment) = ($1, $2); }
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else
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{ $comment = undef; };
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# Split any brace groups.
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if ($isFileLine && $hasBraceGroups && $line =~ /[\{\}]/)
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{
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($line, @virtualLines) = split(/([\{\}])/, $line);
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$virtualLines[-1] .= $comment;
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$comment = undef;
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};
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# Remove whitespace.
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$line =~ s/^ //;
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$line =~ s/ $//;
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$comment =~ s/ $//;
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# We want to keep the leading space on a comment.
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}
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while (!$line);
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# Process the line.
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if ($hasBraceGroups && ($line eq '{' || $line eq '}'))
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{
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return ($line, undef, undef);
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};
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if ($line =~ /^([a-z0-9\ \'\/\.\-]+?) ?: ?(.*)$/i) # [CFChars]
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{
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my ($keyword, $value) = ($1, $2);
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return (lc($keyword), $value, $comment);
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}
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else
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{
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return (undef, $line, $comment);
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};
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};
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#
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# Function: LineNumber
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#
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# Returns the line number for the line last returned by <GetLine()>.
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#
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sub LineNumber
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{ return $lineNumber; };
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###############################################################################
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# Group: Error Functions
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#
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# Function: AddError
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#
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# Stores an error for the current configuration file. Will be attached to the last line read by <GetLine()>.
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#
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# Parameters:
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#
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# message - The error message.
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# lineNumber - The line number to use. If not specified, it will use the line number from the last call to <GetLine()>.
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#
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sub AddError #(message, lineNumber)
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{
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my ($self, $message, $messageLineNumber) = @_;
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if (!defined $messageLineNumber)
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{ $messageLineNumber = $lineNumber; };
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push @errors, $messageLineNumber, $message;
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};
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#
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# Function: ErrorCount
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#
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# Returns how many errors the configuration file has.
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#
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sub ErrorCount
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{
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return (scalar @errors) / 2;
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};
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#
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# Function: PrintErrorsAndAnnotateFile
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#
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# Prints the errors to STDERR in the standard GNU format and annotates the configuration file with them. It does *not* end
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# execution. <Close()> *must* be called before this function.
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#
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sub PrintErrorsAndAnnotateFile
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{
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my ($self) = @_;
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if (scalar @errors)
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{
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open(CONFIG_FILEHANDLE, '<' . $file);
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my @lines = <CONFIG_FILEHANDLE>;
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close(CONFIG_FILEHANDLE);
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# We need to keep track of both the real and the original line numbers. The original line numbers are for matching errors in
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# the errors array, and don't include any comment lines added or deleted. Line number is the current line number including
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# those comment lines for sending to the display.
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my $lineNumber = 1;
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my $originalLineNumber = 1;
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open(CONFIG_FILEHANDLE, '>' . $file);
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# We don't want to keep the old error header, if present.
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if ($lines[0] =~ /^\# There (?:is an error|are \d+ errors) in this file\./)
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{
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shift @lines;
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$originalLineNumber++;
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# We want to drop the blank line after it as well.
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if ($lines[0] eq "\n")
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{
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shift @lines;
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$originalLineNumber++;
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};
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};
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if ($self->ErrorCount() == 1)
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{
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print CONFIG_FILEHANDLE
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"# There is an error in this file. Search for ERROR to find it.\n\n";
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}
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else
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{
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print CONFIG_FILEHANDLE
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"# There are " . $self->ErrorCount() . " errors in this file. Search for ERROR to find them.\n\n";
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};
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$lineNumber += 2;
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foreach my $line (@lines)
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{
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while (scalar @errors && $originalLineNumber == $errors[0])
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{
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my $errorLine = shift @errors;
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my $errorMessage = shift @errors;
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print CONFIG_FILEHANDLE "# ERROR: " . $errorMessage . "\n";
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# Use the GNU error format, which should make it easier to handle errors when Natural Docs is part of a build process.
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# See http://www.gnu.org/prep/standards_15.html
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$errorMessage = lcfirst($errorMessage);
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$errorMessage =~ s/\.$//;
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print STDERR 'NaturalDocs:' . $file . ':' . $lineNumber . ': ' . $errorMessage . "\n";
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$lineNumber++;
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};
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# We want to remove error lines from previous runs.
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if (substr($line, 0, 9) ne '# ERROR: ')
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{
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print CONFIG_FILEHANDLE $line;
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$lineNumber++;
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};
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$originalLineNumber++;
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};
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# Clean up any remaining errors.
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while (scalar @errors)
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{
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my $errorLine = shift @errors;
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my $errorMessage = shift @errors;
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print CONFIG_FILEHANDLE "# ERROR: " . $errorMessage . "\n";
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# Use the GNU error format, which should make it easier to handle errors when Natural Docs is part of a build process.
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# See http://www.gnu.org/prep/standards_15.html
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$errorMessage = lcfirst($errorMessage);
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$errorMessage =~ s/\.$//;
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print STDERR 'NaturalDocs:' . $file . ':' . $lineNumber . ': ' . $errorMessage . "\n";
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};
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close(CONFIG_FILEHANDLE);
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};
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};
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###############################################################################
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# Group: Misc Functions
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#
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# Function: HasOnlyCFChars
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#
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# Returns whether the passed string contains only <CFChars>.
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#
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sub HasOnlyCFChars #(string)
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{
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my ($self, $string) = @_;
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return ($string =~ /^[a-z0-9\ \.\-\/\']*$/i); # [CFChars]
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};
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#
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# Function: CFCharNames
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#
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# Returns a plain-english list of <CFChars> which can be embedded in a sentence. For example, "You can only use
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# [CFCharsList()] in the name.
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#
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sub CFCharNames
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{
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# [CFChars]
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return 'letters, numbers, spaces, periods, dashes, slashes, and apostrophes';
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};
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#
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# Function: Obscure
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#
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# Obscures the passed text so that it is not user editable and returns it. The encoding method is not secure; it is just designed
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# to be fast and to discourage user editing.
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#
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sub Obscure #(text)
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{
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my ($self, $text) = @_;
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# ` is specifically chosen to encode to space because of its rarity. We don't want a trailing one to get cut off before decoding.
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$text =~ tr{a-zA-Z0-9\ \\\/\.\:\_\-\`}
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{pY9fGc\`R8lAoE\\uIdH6tN\/7sQjKx0B5mW\.vZ41PyFg\:CrLaO\_eUi2DhT\-nSqJkXb3MwVz\ };
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return $text;
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};
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#
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# Function: Unobscure
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#
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# Restores text encoded with <Obscure()> and returns it.
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#
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sub Unobscure #(text)
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{
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my ($self, $text) = @_;
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$text =~ tr{pY9fGc\`R8lAoE\\uIdH6tN\/7sQjKx0B5mW\.vZ41PyFg\:CrLaO\_eUi2DhT\-nSqJkXb3MwVz\ }
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{a-zA-Z0-9\ \\\/\.\:\_\-\`};
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return $text;
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};
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1;
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