lyx_mirror/src/lyxlex.C

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/**
* \file lyxlex.C
* Copyright 1996-2002 the LyX Team
* Read the file COPYING
*
* Generalized simple lexical analyzer.
* It can be used for simple syntax parsers, like lyxrc,
* texclass and others to come.
*
* \author Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
*/
#include <config.h>
#ifdef __GNUG__
#pragma implementation "lyxlex.h"
#endif
#include "lyxlex.h"
#include "lyxlex_pimpl.h"
#include "debug.h"
#include "support/filetools.h"
#include "support/lstrings.h"
using std::ostream;
using std::istream;
using std::endl;
LyXLex::LyXLex(keyword_item * tab, int num)
: pimpl_(new Pimpl(tab, num))
{}
LyXLex::~LyXLex()
{
delete pimpl_;
}
bool LyXLex::isOK() const
{
return pimpl_->is.good();
}
void LyXLex::setLineNo(int l)
{
pimpl_->lineno = l;
}
int LyXLex::getLineNo() const
{
return pimpl_->lineno;
}
string const LyXLex::text() const
{
return &pimpl_->buff[0];
}
istream & LyXLex::getStream()
{
return pimpl_->is;
}
void LyXLex::pushTable(keyword_item * tab, int num)
{
pimpl_->pushTable(tab, num);
}
void LyXLex::popTable()
{
pimpl_->popTable();
}
void LyXLex::printTable(ostream & os)
{
pimpl_->printTable(os);
}
void LyXLex::printError(string const & message) const
{
pimpl_->printError(message);
}
bool LyXLex::setFile(string const & filename)
{
return pimpl_->setFile(filename);
}
void LyXLex::setStream(istream & i)
{
pimpl_->setStream(i);
}
void LyXLex::setCommentChar(char c)
{
pimpl_->setCommentChar(c);
}
int LyXLex::lex()
{
return pimpl_->lex();
}
int LyXLex::getInteger() const
{
if (isStrInt(pimpl_->getString())) {
return strToInt(pimpl_->getString());
} else {
pimpl_->printError("Bad integer `$$Token'");
return -1;
}
}
float LyXLex::getFloat() const
{
// replace comma with dot in case the file was written with
// the wrong locale (should be rare, but is easy enough to
// avoid).
string str = subst(pimpl_->getString(), ",", ".");
if (isStrDbl(str))
return strToDbl(str);
else {
pimpl_->printError("Bad float `$$Token'");
return -1;
}
}
string const LyXLex::getString() const
{
return pimpl_->getString();
}
// I would prefer to give a tag number instead of an explicit token
// here, but it is not possible because Buffer::readLyXformat2 uses
// explicit tokens (JMarc)
string const LyXLex::getLongString(string const & endtoken)
{
string str, prefix;
bool firstline = true;
while (isOK()) {
if (!eatLine())
// blank line in the file being read
continue;
string const token = trim(getString(), " \t");
lyxerr[Debug::PARSER] << "LongString: `"
<< getString() << '\'' << endl;
// We do a case independent comparison, like search_kw
// does.
if (compare_ascii_no_case(token, endtoken) == 0)
break;
string tmpstr = getString();
if (firstline) {
string::size_type i(tmpstr.find_first_not_of(' '));
if (i != string::npos)
prefix = tmpstr.substr(0, i);
firstline = false;
lyxerr[Debug::PARSER]
<< "Prefix = `" << prefix << "\'" << endl;
}
// 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 (!isOK()) {
printError("Long string not ended by `" + endtoken + '\'');
}
return str;
}
bool LyXLex::getBool() const
{
if (compare(pimpl_->buff, "true") == 0) {
return true;
} else if (compare(pimpl_->buff, "false") != 0) {
pimpl_->printError("Bad boolean `$$Token'. Use \"false\" or \"true\"");
}
return false;
}
bool LyXLex::eatLine()
{
return pimpl_->eatLine();
}
bool LyXLex::next(bool esc)
{
return pimpl_->next(esc);
}
bool LyXLex::nextToken()
{
return pimpl_->nextToken();
}
void LyXLex::pushToken(string const & pt)
{
pimpl_->pushToken(pt);
}
int LyXLex::findToken(char const * str[])
{
if (!next()) {
pimpl_->printError("file ended while scanning string token");
return -1;
}
int i = 0;
if (compare(pimpl_->buff, "default")) {
while (str[i][0] && compare(str[i], pimpl_->buff)) {
++i;
}
if (!str[i][0]) {
pimpl_->printError("Unknown argument `$$Token'");
i = -1;
}
}
return i;
}