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c2bdcc6b63
- implement quoteString for docstring * Menus.cpp: - use it for quoting flex argument. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@27703 a592a061-630c-0410-9148-cb99ea01b6c8
947 lines
17 KiB
C++
947 lines
17 KiB
C++
/**
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* \file Lexer.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Alejandro Aguilar Sierra
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* \author Lars Gullik Bjønnes
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* \author Jean-Marc Lasgouttes
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* \author John Levon
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "Lexer.h"
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#include "support/convert.h"
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#include "support/debug.h"
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#include "support/FileName.h"
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#include "support/filetools.h"
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#include "support/gzstream.h"
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#include "support/lstrings.h"
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#include "support/lyxalgo.h"
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#include "support/types.h"
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#include <functional>
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#include <istream>
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#include <stack>
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#include <vector>
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using namespace std;
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using namespace lyx::support;
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namespace lyx {
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//////////////////////////////////////////////////////////////////////
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//
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// Lexer::Pimpl
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//
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//////////////////////////////////////////////////////////////////////
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///
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class Lexer::Pimpl {
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public:
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///
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Pimpl(LexerKeyword * tab, int num);
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///
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string const getString() const;
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///
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docstring const getDocString() const;
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///
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void printError(string const & message) const;
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///
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void printTable(ostream & os);
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///
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void pushTable(LexerKeyword * tab, int num);
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///
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void popTable();
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///
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bool setFile(FileName const & filename);
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///
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void setStream(istream & i);
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///
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void setCommentChar(char c);
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///
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bool next(bool esc = false);
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///
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int searchKeyword(char const * const tag) const;
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///
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int lex();
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///
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bool eatLine();
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///
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bool nextToken();
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/// test if there is a pushed token or the stream is ok
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bool inputAvailable();
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///
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void pushToken(string const &);
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/// fb_ is only used to open files, the stream is accessed through is.
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filebuf fb_;
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/// gz_ is only used to open files, the stream is accessed through is.
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gz::gzstreambuf gz_;
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/// the stream that we use.
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istream is;
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///
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string name;
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///
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LexerKeyword * table;
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///
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int no_items;
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///
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string buff;
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///
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int status;
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///
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int lineno;
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///
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string pushTok;
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///
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char commentChar;
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/// used for error messages
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string context;
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private:
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/// non-copyable
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Pimpl(Pimpl const &);
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void operator=(Pimpl const &);
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///
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void verifyTable();
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///
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class PushedTable {
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public:
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///
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PushedTable()
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: table_elem(0), table_siz(0) {}
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///
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PushedTable(LexerKeyword * ki, int siz)
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: table_elem(ki), table_siz(siz) {}
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///
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LexerKeyword * table_elem;
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///
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int table_siz;
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};
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///
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stack<PushedTable> pushed;
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};
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namespace {
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class CompareTags
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: public binary_function<LexerKeyword, LexerKeyword, bool> {
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public:
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// used by lower_bound, sort and sorted
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bool operator()(LexerKeyword const & a, LexerKeyword const & b) const
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{
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// we use the ascii version, because in turkish, 'i'
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// is not the lowercase version of 'I', and thus
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// turkish locale breaks parsing of tags.
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return compare_ascii_no_case(a.tag, b.tag) < 0;
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}
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};
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} // end of anon namespace
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Lexer::Pimpl::Pimpl(LexerKeyword * tab, int num)
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: is(&fb_), table(tab), no_items(num),
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status(0), lineno(0), commentChar('#')
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{
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verifyTable();
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}
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string const Lexer::Pimpl::getString() const
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{
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return buff;
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}
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docstring const Lexer::Pimpl::getDocString() const
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{
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return from_utf8(buff);
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}
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void Lexer::Pimpl::printError(string const & message) const
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{
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string const tmpmsg = subst(message, "$$Token", getString());
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lyxerr << "LyX: " << tmpmsg << " [around line " << lineno
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<< " of file " << to_utf8(makeDisplayPath(name))
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<< " current token: '" << getString() << "'"
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<< " context: '" << context << "']" << endl;
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}
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void Lexer::Pimpl::printTable(ostream & os)
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{
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os << "\nNumber of tags: " << no_items << endl;
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for (int i= 0; i < no_items; ++i)
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os << "table[" << i
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<< "]: tag: `" << table[i].tag
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<< "' code:" << table[i].code << '\n';
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os.flush();
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}
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void Lexer::Pimpl::verifyTable()
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{
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// Check if the table is sorted and if not, sort it.
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if (table
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&& !lyx::sorted(table, table + no_items, CompareTags())) {
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lyxerr << "The table passed to Lexer is not sorted!\n"
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<< "Tell the developers to fix it!" << endl;
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// We sort it anyway to avoid problems.
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lyxerr << "\nUnsorted:" << endl;
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printTable(lyxerr);
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sort(table, table + no_items, CompareTags());
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lyxerr << "\nSorted:" << endl;
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printTable(lyxerr);
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}
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}
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void Lexer::Pimpl::pushTable(LexerKeyword * tab, int num)
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{
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PushedTable tmppu(table, no_items);
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pushed.push(tmppu);
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table = tab;
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no_items = num;
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verifyTable();
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}
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void Lexer::Pimpl::popTable()
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{
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if (pushed.empty()) {
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lyxerr << "Lexer error: nothing to pop!" << endl;
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return;
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}
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PushedTable tmp = pushed.top();
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pushed.pop();
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table = tmp.table_elem;
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no_items = tmp.table_siz;
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}
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bool Lexer::Pimpl::setFile(FileName const & filename)
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{
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// Check the format of the file.
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string const format = filename.guessFormatFromContents();
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if (format == "gzip" || format == "zip" || format == "compress") {
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LYXERR(Debug::LYXLEX, "lyxlex: compressed");
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// The check only outputs a debug message, because it triggers
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// a bug in compaq cxx 6.2, where is_open() returns 'true' for
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// a fresh new filebuf. (JMarc)
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if (gz_.is_open() || istream::off_type(is.tellg()) > -1)
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LYXERR(Debug::LYXLEX, "Error in LyXLex::setFile: "
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"file or stream already set.");
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gz_.open(filename.toFilesystemEncoding().c_str(), ios::in);
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is.rdbuf(&gz_);
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name = filename.absFilename();
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lineno = 0;
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return gz_.is_open() && is.good();
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} else {
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LYXERR(Debug::LYXLEX, "lyxlex: UNcompressed");
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// The check only outputs a debug message, because it triggers
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// a bug in compaq cxx 6.2, where is_open() returns 'true' for
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// a fresh new filebuf. (JMarc)
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if (fb_.is_open() || istream::off_type(is.tellg()) > 0) {
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LYXERR(Debug::LYXLEX, "Error in Lexer::setFile: "
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"file or stream already set.");
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}
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fb_.open(filename.toFilesystemEncoding().c_str(), ios::in);
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is.rdbuf(&fb_);
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name = filename.absFilename();
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lineno = 0;
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return fb_.is_open() && is.good();
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}
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}
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void Lexer::Pimpl::setStream(istream & i)
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{
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if (fb_.is_open() || istream::off_type(is.tellg()) > 0) {
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LYXERR(Debug::LYXLEX, "Error in Lexer::setStream: "
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"file or stream already set.");
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}
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is.rdbuf(i.rdbuf());
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lineno = 0;
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}
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void Lexer::Pimpl::setCommentChar(char c)
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{
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commentChar = c;
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}
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bool Lexer::Pimpl::next(bool esc /* = false */)
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{
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if (!pushTok.empty()) {
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// There can have been a whole line pushed so
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// we extract the first word and leaves the rest
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// in pushTok. (Lgb)
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if (pushTok[0] == '\\' && pushTok.find(' ') != string::npos) {
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buff.clear();
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pushTok = split(pushTok, buff, ' ');
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} else {
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buff = pushTok;
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pushTok.clear();
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}
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status = LEX_TOKEN;
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return true;
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}
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unsigned char c = 0; // getc() returns an int
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char cc = 0;
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status = 0;
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while (is && !status) {
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is.get(cc);
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c = cc;
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if (c == commentChar) {
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// Read rest of line (fast :-)
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#if 1
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// That is not fast... (Lgb)
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string dummy;
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getline(is, dummy);
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LYXERR(Debug::LYXLEX, "Comment read: `" << c << dummy << '\'');
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#else
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// unfortunately ignore is buggy (Lgb)
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is.ignore(100, '\n');
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#endif
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++lineno;
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continue;
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}
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if (c == '\"') {
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buff.clear();
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if (esc) {
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bool escaped = false;
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do {
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escaped = false;
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is.get(cc);
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c = cc;
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if (c == '\r') continue;
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if (c == '\\') {
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// escape the next char
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is.get(cc);
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c = cc;
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if (c == '\"' || c == '\\')
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escaped = true;
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else
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buff.push_back('\\');
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}
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buff.push_back(c);
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if (!escaped && c == '\"')
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break;
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} while (c != '\n' && is);
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} else {
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do {
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is.get(cc);
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c = cc;
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if (c != '\r')
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buff.push_back(c);
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} while (c != '\"' && c != '\n' && is);
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}
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if (c != '\"') {
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printError("Missing quote");
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if (c == '\n')
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++lineno;
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}
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buff.resize(buff.size() - 1);
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status = LEX_DATA;
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break;
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}
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if (c == ',')
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continue; /* Skip ','s */
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// using relational operators with chars other
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// than == and != is not safe. And if it is done
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// the type _have_ to be unsigned. It usually a
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// lot better to use the functions from cctype
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if (c > ' ' && is) {
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buff.clear();
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do {
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if (esc && c == '\\') {
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// escape the next char
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is.get(cc);
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c = cc;
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//escaped = true;
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}
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buff.push_back(c);
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is.get(cc);
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c = cc;
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} while (c > ' ' && c != ',' && is);
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status = LEX_TOKEN;
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}
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if (c == '\r' && is) {
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// The Windows support has lead to the
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// possibility of "\r\n" at the end of
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// a line. This will stop LyX choking
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// when it expected to find a '\n'
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is.get(cc);
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c = cc;
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}
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if (c == '\n')
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++lineno;
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}
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if (status)
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return true;
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status = is.eof() ? LEX_FEOF: LEX_UNDEF;
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buff.clear();
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return false;
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}
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int Lexer::Pimpl::searchKeyword(char const * const tag) const
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{
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LexerKeyword search_tag = { tag, 0 };
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LexerKeyword * res =
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lower_bound(table, table + no_items,
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search_tag, CompareTags());
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// use the compare_ascii_no_case instead of compare_no_case,
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// because in turkish, 'i' is not the lowercase version of 'I',
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// and thus turkish locale breaks parsing of tags.
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if (res != table + no_items
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&& !compare_ascii_no_case(res->tag, tag))
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return res->code;
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return LEX_UNDEF;
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}
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int Lexer::Pimpl::lex()
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{
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//NOTE: possible bug.
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if (next() && status == LEX_TOKEN)
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return searchKeyword(getString().c_str());
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return status;
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}
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bool Lexer::Pimpl::eatLine()
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{
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buff.clear();
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unsigned char c = '\0';
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char cc = 0;
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while (is && c != '\n') {
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is.get(cc);
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c = cc;
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//LYXERR(Debug::LYXLEX, "Lexer::EatLine read char: `" << c << '\'');
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if (c != '\r')
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buff.push_back(c);
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}
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if (c == '\n') {
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++lineno;
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buff.resize(buff.size() - 1);
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status = LEX_DATA;
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return true;
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} else if (buff.length() > 0) { // last line
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status = LEX_DATA;
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return true;
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} else {
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return false;
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}
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}
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bool Lexer::Pimpl::nextToken()
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{
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if (!pushTok.empty()) {
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// There can have been a whole line pushed so
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// we extract the first word and leaves the rest
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// in pushTok. (Lgb)
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if (pushTok[0] == '\\' && pushTok.find(' ') != string::npos) {
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buff.clear();
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pushTok = split(pushTok, buff, ' ');
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} else {
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buff = pushTok;
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pushTok.clear();
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}
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status = LEX_TOKEN;
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return true;
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}
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status = 0;
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while (is && !status) {
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unsigned char c = 0;
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char cc = 0;
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is.get(cc);
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c = cc;
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if ((c >= ' ' || c == '\t') && is) {
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buff.clear();
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if (c == '\\') { // first char == '\\'
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do {
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buff.push_back(c);
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is.get(cc);
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c = cc;
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} while (c > ' ' && c != '\\' && is);
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} else {
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do {
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buff.push_back(c);
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is.get(cc);
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c = cc;
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} while ((c >= ' ' || c == '\t') && c != '\\' && is);
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}
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if (c == '\\')
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is.putback(c); // put it back
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status = LEX_TOKEN;
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}
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if (c == '\n')
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++lineno;
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}
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if (status)
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return true;
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status = is.eof() ? LEX_FEOF: LEX_UNDEF;
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buff.clear();
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return false;
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}
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bool Lexer::Pimpl::inputAvailable()
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{
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return is.good();
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}
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void Lexer::Pimpl::pushToken(string const & pt)
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{
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pushTok = pt;
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}
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//////////////////////////////////////////////////////////////////////
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//
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// Lexer
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//
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//////////////////////////////////////////////////////////////////////
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Lexer::Lexer()
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: pimpl_(new Pimpl(0, 0))
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{}
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void Lexer::init(LexerKeyword * tab, int num)
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{
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pimpl_ = new Pimpl(tab, num);
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}
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Lexer::~Lexer()
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{
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delete pimpl_;
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}
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bool Lexer::isOK() const
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{
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return pimpl_->inputAvailable();
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}
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void Lexer::setLineNumber(int l)
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{
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pimpl_->lineno = l;
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}
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int Lexer::lineNumber() const
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{
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return pimpl_->lineno;
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}
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istream & Lexer::getStream()
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{
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return pimpl_->is;
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}
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void Lexer::pushTable(LexerKeyword * tab, int num)
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{
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pimpl_->pushTable(tab, num);
|
|
}
|
|
|
|
|
|
void Lexer::popTable()
|
|
{
|
|
pimpl_->popTable();
|
|
}
|
|
|
|
|
|
void Lexer::printTable(ostream & os)
|
|
{
|
|
pimpl_->printTable(os);
|
|
}
|
|
|
|
|
|
void Lexer::printError(string const & message) const
|
|
{
|
|
pimpl_->printError(message);
|
|
}
|
|
|
|
|
|
bool Lexer::setFile(FileName const & filename)
|
|
{
|
|
return pimpl_->setFile(filename);
|
|
}
|
|
|
|
|
|
void Lexer::setStream(istream & i)
|
|
{
|
|
pimpl_->setStream(i);
|
|
}
|
|
|
|
|
|
void Lexer::setCommentChar(char c)
|
|
{
|
|
pimpl_->setCommentChar(c);
|
|
}
|
|
|
|
|
|
int Lexer::lex()
|
|
{
|
|
return pimpl_->lex();
|
|
}
|
|
|
|
|
|
int Lexer::getInteger() const
|
|
{
|
|
lastReadOk_ = pimpl_->status == LEX_DATA || pimpl_->status == LEX_TOKEN;
|
|
if (!lastReadOk_) {
|
|
pimpl_->printError("integer token missing");
|
|
return -1;
|
|
}
|
|
|
|
if (isStrInt(pimpl_->getString()))
|
|
return convert<int>(pimpl_->getString());
|
|
|
|
lastReadOk_ = false;
|
|
pimpl_->printError("Bad integer `$$Token'");
|
|
return -1;
|
|
}
|
|
|
|
|
|
double Lexer::getFloat() const
|
|
{
|
|
// replace comma with dot in case the file was written with
|
|
// the wrong locale (should be rare, but is easy enough to
|
|
// avoid).
|
|
lastReadOk_ = pimpl_->status == LEX_DATA || pimpl_->status == LEX_TOKEN;
|
|
if (!lastReadOk_) {
|
|
pimpl_->printError("float token missing");
|
|
return -1;
|
|
}
|
|
|
|
string const str = subst(pimpl_->getString(), ",", ".");
|
|
if (isStrDbl(str))
|
|
return convert<double>(str);
|
|
|
|
lastReadOk_ = false;
|
|
pimpl_->printError("Bad float `$$Token'");
|
|
return -1;
|
|
}
|
|
|
|
|
|
string const Lexer::getString() const
|
|
{
|
|
lastReadOk_ = pimpl_->status == LEX_DATA || pimpl_->status == LEX_TOKEN;
|
|
|
|
if (lastReadOk_)
|
|
return pimpl_->getString();
|
|
|
|
return string();
|
|
}
|
|
|
|
|
|
docstring const Lexer::getDocString() const
|
|
{
|
|
lastReadOk_ = pimpl_->status == LEX_DATA || pimpl_->status == LEX_TOKEN;
|
|
|
|
if (lastReadOk_)
|
|
return pimpl_->getDocString();
|
|
|
|
return docstring();
|
|
}
|
|
|
|
|
|
// I would prefer to give a tag number instead of an explicit token
|
|
// here, but it is not possible because Buffer::readDocument uses
|
|
// explicit tokens (JMarc)
|
|
string const Lexer::getLongString(string const & endtoken)
|
|
{
|
|
string str;
|
|
string prefix;
|
|
bool firstline = true;
|
|
|
|
while (pimpl_->is) { //< eatLine only reads from is, not from pushTok
|
|
if (!eatLine())
|
|
// blank line in the file being read
|
|
continue;
|
|
|
|
string const token = trim(getString(), " \t");
|
|
|
|
LYXERR(Debug::PARSER, "LongString: `" << getString() << '\'');
|
|
|
|
// We do a case independent comparison, like searchKeyword does.
|
|
if (compare_ascii_no_case(token, endtoken) == 0)
|
|
break;
|
|
|
|
string tmpstr = getString();
|
|
if (firstline) {
|
|
size_t i = tmpstr.find_first_not_of(' ');
|
|
if (i != string::npos)
|
|
prefix = tmpstr.substr(0, i);
|
|
firstline = false;
|
|
LYXERR(Debug::PARSER, "Prefix = `" << prefix << "\'");
|
|
}
|
|
|
|
// further lines in long strings may have the same
|
|
// whitespace prefix as the first line. Remove it.
|
|
if (prefix.length() && prefixIs(tmpstr, prefix))
|
|
tmpstr.erase(0, prefix.length() - 1);
|
|
|
|
str += ltrim(tmpstr, "\t") + '\n';
|
|
}
|
|
|
|
if (!pimpl_->is)
|
|
printError("Long string not ended by `" + endtoken + '\'');
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
bool Lexer::getBool() const
|
|
{
|
|
string const s = pimpl_->getString();
|
|
if (s == "false" || s == "0") {
|
|
lastReadOk_ = true;
|
|
return false;
|
|
}
|
|
if (s == "true" || s == "1") {
|
|
lastReadOk_ = true;
|
|
return true;
|
|
}
|
|
pimpl_->printError("Bad boolean `$$Token'. "
|
|
"Use \"false\" or \"true\"");
|
|
lastReadOk_ = false;
|
|
return false;
|
|
}
|
|
|
|
|
|
bool Lexer::eatLine()
|
|
{
|
|
return pimpl_->eatLine();
|
|
}
|
|
|
|
|
|
bool Lexer::next(bool esc)
|
|
{
|
|
return pimpl_->next(esc);
|
|
}
|
|
|
|
|
|
bool Lexer::nextToken()
|
|
{
|
|
return pimpl_->nextToken();
|
|
}
|
|
|
|
|
|
void Lexer::pushToken(string const & pt)
|
|
{
|
|
pimpl_->pushToken(pt);
|
|
}
|
|
|
|
|
|
Lexer::operator void const *() const
|
|
{
|
|
// This behaviour is NOT the same as the streams which would
|
|
// use fail() here. However, our implementation of getString() et al.
|
|
// can cause the eof() and fail() bits to be set, even though we
|
|
// haven't tried to read 'em.
|
|
return lastReadOk_? this : 0;
|
|
}
|
|
|
|
|
|
bool Lexer::operator!() const
|
|
{
|
|
return !lastReadOk_;
|
|
}
|
|
|
|
|
|
Lexer & Lexer::operator>>(string & s)
|
|
{
|
|
if (isOK()) {
|
|
next();
|
|
s = getString();
|
|
} else {
|
|
lastReadOk_ = false;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
|
|
Lexer & Lexer::operator>>(docstring & s)
|
|
{
|
|
if (isOK()) {
|
|
next();
|
|
s = getDocString();
|
|
} else {
|
|
lastReadOk_ = false;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
|
|
Lexer & Lexer::operator>>(double & s)
|
|
{
|
|
if (isOK()) {
|
|
next();
|
|
s = getFloat();
|
|
} else {
|
|
lastReadOk_ = false;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
|
|
Lexer & Lexer::operator>>(int & s)
|
|
{
|
|
if (isOK()) {
|
|
next();
|
|
s = getInteger();
|
|
} else {
|
|
lastReadOk_ = false;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
|
|
Lexer & Lexer::operator>>(unsigned int & s)
|
|
{
|
|
if (isOK()) {
|
|
next();
|
|
s = getInteger();
|
|
} else {
|
|
lastReadOk_ = false;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
|
|
Lexer & Lexer::operator>>(bool & s)
|
|
{
|
|
if (isOK()) {
|
|
next();
|
|
s = getBool();
|
|
} else {
|
|
lastReadOk_ = false;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
|
|
Lexer & Lexer::operator>>(char & c)
|
|
{
|
|
string s;
|
|
operator>>(s);
|
|
if (!s.empty())
|
|
c = s[0];
|
|
return *this;
|
|
}
|
|
|
|
|
|
// quotes a string, e.g. for use in preferences files or as an argument
|
|
// of the "log" dialog
|
|
string Lexer::quoteString(string const & arg)
|
|
{
|
|
string res;
|
|
res += '"';
|
|
res += subst(subst(arg, "\\", "\\\\"), "\"", "\\\"");
|
|
res += '"';
|
|
return res;
|
|
}
|
|
|
|
|
|
// same for docstring
|
|
docstring Lexer::quoteString(docstring const & arg)
|
|
{
|
|
docstring res;
|
|
res += '"';
|
|
res += subst(subst(arg, from_ascii("\\"), from_ascii("\\\\")),
|
|
from_ascii("\""), from_ascii("\\\""));
|
|
res += '"';
|
|
return res;
|
|
}
|
|
|
|
|
|
Lexer & Lexer::operator>>(char const * required)
|
|
{
|
|
string token;
|
|
*this >> token;
|
|
if (token != required) {
|
|
LYXERR0("Missing '" << required << "'-tag in " << pimpl_->context
|
|
<< ". Got " << token << " instead. Line: " << lineNumber());
|
|
pushToken(token);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
|
|
bool Lexer::checkFor(char const * required)
|
|
{
|
|
string token;
|
|
*this >> token;
|
|
if (token == required)
|
|
return true;
|
|
pushToken(token);
|
|
return false;
|
|
}
|
|
|
|
|
|
void Lexer::setContext(std::string const & str)
|
|
{
|
|
pimpl_->context = str;
|
|
}
|
|
|
|
|
|
} // namespace lyx
|