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504 lines
18 KiB
Perl
504 lines
18 KiB
Perl
###############################################################################
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#
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# Class: NaturalDocs::Languages::Simple
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#
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###############################################################################
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#
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# A class containing the characteristics of a particular programming language for basic support within Natural Docs.
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# Also serves as a base class for languages that break from general conventions, such as not having parameter lists use
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# parenthesis and commas.
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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::Languages::Simple;
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use base 'NaturalDocs::Languages::Base';
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use base 'Exporter';
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our @EXPORT = ( 'ENDER_ACCEPT', 'ENDER_IGNORE', 'ENDER_ACCEPT_AND_CONTINUE', 'ENDER_REVERT_TO_ACCEPTED' );
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use NaturalDocs::DefineMembers 'LINE_COMMENT_SYMBOLS', 'LineCommentSymbols()', 'SetLineCommentSymbols() duparrayref',
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'BLOCK_COMMENT_SYMBOLS', 'BlockCommentSymbols()',
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'SetBlockCommentSymbols() duparrayref',
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'PROTOTYPE_ENDERS',
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'LINE_EXTENDER', 'LineExtender()', 'SetLineExtender()',
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'PACKAGE_SEPARATOR', 'PackageSeparator()',
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'PACKAGE_SEPARATOR_WAS_SET', 'PackageSeparatorWasSet()',
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'ENUM_VALUES', 'EnumValues()',
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'ENUM_VALUES_WAS_SET', 'EnumValuesWasSet()';
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#
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# Function: New
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#
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# Creates and returns a new object.
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#
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# Parameters:
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#
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# name - The name of the language.
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#
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sub New #(name)
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{
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my ($selfPackage, $name) = @_;
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my $object = $selfPackage->SUPER::New($name);
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$object->[ENUM_VALUES] = ::ENUM_GLOBAL();
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$object->[PACKAGE_SEPARATOR] = '.';
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return $object;
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};
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#
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# Functions: Members
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#
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# LineCommentSymbols - Returns an arrayref of symbols that start a line comment, or undef if none.
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# SetLineCommentSymbols - Replaces the arrayref of symbols that start a line comment.
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# BlockCommentSymbols - Returns an arrayref of start/end symbol pairs that specify a block comment, or undef if none. Pairs
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# are specified with two consecutive array entries.
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# SetBlockCommentSymbols - Replaces the arrayref of start/end symbol pairs that specify a block comment. Pairs are
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# specified with two consecutive array entries.
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# LineExtender - Returns the symbol to ignore a line break in languages where line breaks are significant.
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# SetLineExtender - Replaces the symbol to ignore a line break in languages where line breaks are significant.
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# PackageSeparator - Returns the package separator symbol.
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# PackageSeparatorWasSet - Returns whether the package separator symbol was ever changed from the default.
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#
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#
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# Function: SetPackageSeparator
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# Replaces the language's package separator string.
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#
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sub SetPackageSeparator #(separator)
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{
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my ($self, $separator) = @_;
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$self->[PACKAGE_SEPARATOR] = $separator;
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$self->[PACKAGE_SEPARATOR_WAS_SET] = 1;
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};
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#
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# Functions: Members
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#
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# EnumValues - Returns the <EnumValuesType> that describes how the language handles enums.
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# EnumValuesWasSet - Returns whether <EnumValues> was ever changed from the default.
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#
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# Function: SetEnumValues
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# Replaces the <EnumValuesType> that describes how the language handles enums.
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#
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sub SetEnumValues #(EnumValuesType newBehavior)
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{
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my ($self, $behavior) = @_;
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$self->[ENUM_VALUES] = $behavior;
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$self->[ENUM_VALUES_WAS_SET] = 1;
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};
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#
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# Function: PrototypeEndersFor
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#
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# Returns an arrayref of prototype ender symbols for the passed <TopicType>, or undef if none.
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#
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sub PrototypeEndersFor #(type)
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{
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my ($self, $type) = @_;
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if (defined $self->[PROTOTYPE_ENDERS])
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{ return $self->[PROTOTYPE_ENDERS]->{$type}; }
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else
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{ return undef; };
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};
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#
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# Function: SetPrototypeEndersFor
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#
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# Replaces the arrayref of prototype ender symbols for the passed <TopicType>.
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#
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sub SetPrototypeEndersFor #(type, enders)
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{
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my ($self, $type, $enders) = @_;
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if (!defined $self->[PROTOTYPE_ENDERS])
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{ $self->[PROTOTYPE_ENDERS] = { }; };
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if (!defined $enders)
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{ delete $self->[PROTOTYPE_ENDERS]->{$type}; }
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else
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{
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$self->[PROTOTYPE_ENDERS]->{$type} = [ @$enders ];
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};
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};
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###############################################################################
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# Group: Parsing Functions
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#
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# Function: ParseFile
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#
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# Parses the passed source file, sending comments acceptable for documentation to <NaturalDocs::Parser->OnComment()>
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# and all other sections to <OnCode()>.
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#
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# Parameters:
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#
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# sourceFile - The <FileName> of the source file to parse.
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# topicList - A reference to the list of <NaturalDocs::Parser::ParsedTopics> being built by the file.
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#
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# Returns:
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#
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# Since this class cannot automatically document the code or generate a scope record, it always returns ( undef, undef ).
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#
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sub ParseFile #(sourceFile, topicsList)
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{
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my ($self, $sourceFile, $topicsList) = @_;
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open(SOURCEFILEHANDLE, '<' . $sourceFile)
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or die "Couldn't open input file " . $sourceFile . "\n";
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my @commentLines;
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my @codeLines;
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my $lastCommentTopicCount = 0;
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if ($self->Name() eq 'Text File')
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{
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my $line = <SOURCEFILEHANDLE>;
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# On the very first line, remove a Unicode BOM if present. Information on it available at:
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# http://www.unicode.org/faq/utf_bom.html#BOM
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$line =~ s/^\xEF\xBB\xBF//;
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while ($line)
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{
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::XChomp(\$line);
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push @commentLines, $line;
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$line = <SOURCEFILEHANDLE>;
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};
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NaturalDocs::Parser->OnComment(\@commentLines, 1);
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}
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else
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{
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my $line = <SOURCEFILEHANDLE>;
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my $lineNumber = 1;
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# On the very first line, remove a Unicode BOM if present. Information on it available at:
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# http://www.unicode.org/faq/utf_bom.html#BOM
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$line =~ s/^\xEF\xBB\xBF//;
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while (defined $line)
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{
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::XChomp(\$line);
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my $originalLine = $line;
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# Retrieve single line comments. This leaves $line at the next line.
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if ($self->StripOpeningSymbols(\$line, $self->LineCommentSymbols()))
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{
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do
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{
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push @commentLines, $line;
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$line = <SOURCEFILEHANDLE>;
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if (!defined $line)
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{ goto EndDo; };
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::XChomp(\$line);
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}
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while ($self->StripOpeningSymbols(\$line, $self->LineCommentSymbols()));
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EndDo: # I hate Perl sometimes.
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}
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# Retrieve multiline comments. This leaves $line at the next line.
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elsif (my $closingSymbol = $self->StripOpeningBlockSymbols(\$line, $self->BlockCommentSymbols()))
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{
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# Note that it is possible for a multiline comment to start correctly but not end so. We want those comments to stay in
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# the code. For example, look at this prototype with this splint annotation:
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#
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# int get_array(integer_t id,
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# /*@out@*/ array_t array);
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#
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# The annotation starts correctly but doesn't end so because it is followed by code on the same line.
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my $lineRemainder;
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for (;;)
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{
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$lineRemainder = $self->StripClosingSymbol(\$line, $closingSymbol);
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push @commentLines, $line;
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# If we found an end comment symbol...
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if (defined $lineRemainder)
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{ last; };
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$line = <SOURCEFILEHANDLE>;
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if (!defined $line)
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{ last; };
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::XChomp(\$line);
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};
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if ($lineRemainder !~ /^[ \t]*$/)
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{
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# If there was something past the closing symbol this wasn't an acceptable comment, so move the lines to code.
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push @codeLines, @commentLines;
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@commentLines = ( );
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};
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$line = <SOURCEFILEHANDLE>;
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}
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# Otherwise just add it to the code.
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else
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{
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push @codeLines, $line;
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$line = <SOURCEFILEHANDLE>;
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};
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# If there were comments, send them to Parser->OnComment().
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if (scalar @commentLines)
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{
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# First process any code lines before the comment.
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if (scalar @codeLines)
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{
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$self->OnCode(\@codeLines, $lineNumber, $topicsList, $lastCommentTopicCount);
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$lineNumber += scalar @codeLines;
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@codeLines = ( );
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};
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$lastCommentTopicCount = NaturalDocs::Parser->OnComment(\@commentLines, $lineNumber);
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$lineNumber += scalar @commentLines;
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@commentLines = ( );
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};
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}; # while (defined $line)
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# Clean up any remaining code.
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if (scalar @codeLines)
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{
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$self->OnCode(\@codeLines, $lineNumber, $topicsList, $lastCommentTopicCount);
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@codeLines = ( );
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};
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};
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close(SOURCEFILEHANDLE);
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return ( undef, undef );
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};
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#
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# Function: OnCode
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#
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# Called whenever a section of code is encountered by the parser. Is used to find the prototype of the last topic created.
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#
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# Parameters:
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#
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# codeLines - The source code as an arrayref of lines.
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# codeLineNumber - The line number of the first line of code.
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# topicList - A reference to the list of <NaturalDocs::Parser::ParsedTopics> being built by the file.
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# lastCommentTopicCount - The number of Natural Docs topics that were created by the last comment.
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#
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sub OnCode #(codeLines, codeLineNumber, topicList, lastCommentTopicCount)
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{
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my ($self, $codeLines, $codeLineNumber, $topicList, $lastCommentTopicCount) = @_;
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if ($lastCommentTopicCount && defined $self->PrototypeEndersFor($topicList->[-1]->Type()))
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{
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my $lineIndex = 0;
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my $prototype;
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# Skip all blank lines before a prototype.
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while ($lineIndex < scalar @$codeLines && $codeLines->[$lineIndex] =~ /^[ \t]*$/)
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{ $lineIndex++; };
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my @tokens;
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my $tokenIndex = 0;
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my @brackets;
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my $enders = $self->PrototypeEndersFor($topicList->[-1]->Type());
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# Add prototype lines until we reach the end of the prototype or the end of the code lines.
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while ($lineIndex < scalar @$codeLines)
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{
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my $line = $self->RemoveLineExtender($codeLines->[$lineIndex] . "\n");
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push @tokens, $line =~ /([^\(\)\[\]\{\}\<\>]+|.)/g;
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while ($tokenIndex < scalar @tokens)
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{
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# If we're not inside brackets, check for ender symbols.
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if (!scalar @brackets)
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{
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my $startingIndex = 0;
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my $testPrototype;
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for (;;)
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{
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my ($enderIndex, $ender) = ::FindFirstSymbol($tokens[$tokenIndex], $enders, $startingIndex);
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if ($enderIndex == -1)
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{ last; }
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else
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{
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# We do this here so we don't duplicate prototype for every single token. Just the first time an ender symbol
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# is found in one.
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if (!defined $testPrototype)
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{ $testPrototype = $prototype; };
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$testPrototype .= substr($tokens[$tokenIndex], $startingIndex, $enderIndex - $startingIndex);
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my $enderResult;
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# If the ender is all text and the character preceding or following it is as well, ignore it.
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if ($ender =~ /^[a-z0-9]+$/i &&
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( ($enderIndex > 0 && substr($tokens[$tokenIndex], $enderIndex - 1, 1) =~ /^[a-z0-9_]$/i) ||
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substr($tokens[$tokenIndex], $enderIndex + length($ender), 1) =~ /^[a-z0-9_]$/i ) )
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{ $enderResult = ENDER_IGNORE(); }
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else
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{ $enderResult = $self->OnPrototypeEnd($topicList->[-1]->Type(), \$testPrototype, $ender); }
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if ($enderResult == ENDER_IGNORE())
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{
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$testPrototype .= $ender;
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$startingIndex = $enderIndex + length($ender);
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}
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elsif ($enderResult == ENDER_REVERT_TO_ACCEPTED())
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{
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return;
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}
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else # ENDER_ACCEPT || ENDER_ACCEPT_AND_CONTINUE
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{
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my $titleInPrototype = $topicList->[-1]->Title();
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# Strip parenthesis so Function(2) and Function(int, int) will still match Function(anything).
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$titleInPrototype =~ s/[\t ]*\([^\(]*$//;
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if (index($testPrototype, $titleInPrototype) != -1)
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{
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$topicList->[-1]->SetPrototype( $self->NormalizePrototype($testPrototype) );
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};
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if ($enderResult == ENDER_ACCEPT())
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{ return; }
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else # ENDER_ACCEPT_AND_CONTINUE
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{
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$testPrototype .= $ender;
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$startingIndex = $enderIndex + length($ender);
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};
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};
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};
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};
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}
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# If we are inside brackets, check for closing symbols.
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elsif ( ($tokens[$tokenIndex] eq ')' && $brackets[-1] eq '(') ||
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($tokens[$tokenIndex] eq ']' && $brackets[-1] eq '[') ||
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($tokens[$tokenIndex] eq '}' && $brackets[-1] eq '{') ||
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($tokens[$tokenIndex] eq '>' && $brackets[-1] eq '<') )
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{
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pop @brackets;
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};
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# Check for opening brackets.
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if ($tokens[$tokenIndex] =~ /^[\(\[\{\<]$/)
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{
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push @brackets, $tokens[$tokenIndex];
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};
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$prototype .= $tokens[$tokenIndex];
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$tokenIndex++;
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};
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$lineIndex++;
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};
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# If we got out of that while loop by running out of lines, there was no prototype.
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};
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};
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use constant ENDER_ACCEPT => 1;
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use constant ENDER_IGNORE => 2;
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use constant ENDER_ACCEPT_AND_CONTINUE => 3;
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use constant ENDER_REVERT_TO_ACCEPTED => 4;
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#
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# Function: OnPrototypeEnd
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#
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# Called whenever the end of a prototype is found so that there's a chance for derived classes to mark false positives.
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#
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# Parameters:
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#
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# type - The <TopicType> of the prototype.
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# prototypeRef - A reference to the prototype so far, minus the ender in dispute.
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# ender - The ender symbol.
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#
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# Returns:
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#
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# ENDER_ACCEPT - The ender is accepted and the prototype is finished.
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# ENDER_IGNORE - The ender is rejected and parsing should continue. Note that the prototype will be rejected as a whole
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# if all enders are ignored before reaching the end of the code.
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# ENDER_ACCEPT_AND_CONTINUE - The ender is accepted so the prototype may stand as is. However, the prototype might
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# also continue on so continue parsing. If there is no accepted ender between here and
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# the end of the code this version will be accepted instead.
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# ENDER_REVERT_TO_ACCEPTED - The expedition from ENDER_ACCEPT_AND_CONTINUE failed. Use the last accepted
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# version and end parsing.
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#
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sub OnPrototypeEnd #(type, prototypeRef, ender)
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{
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return ENDER_ACCEPT();
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};
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#
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# Function: RemoveLineExtender
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#
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# If the passed line has a line extender, returns it without the extender or the line break that follows. If it doesn't, or there are
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# no line extenders defined, returns the passed line unchanged.
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#
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sub RemoveLineExtender #(line)
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{
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my ($self, $line) = @_;
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if (defined $self->LineExtender())
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{
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my $lineExtenderIndex = rindex($line, $self->LineExtender());
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if ($lineExtenderIndex != -1 &&
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substr($line, $lineExtenderIndex + length($self->LineExtender())) =~ /^[ \t]*\n$/)
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{
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$line = substr($line, 0, $lineExtenderIndex) . ' ';
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};
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};
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return $line;
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};
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1;
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