lyx_mirror/src/Lexer.cpp

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/**
* \file Lexer.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Alejandro Aguilar Sierra
* \author Lars Gullik Bjønnes
* \author Jean-Marc Lasgouttes
* \author John Levon
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "Lexer.h"
#include "support/convert.h"
#include "support/debug.h"
#include "support/FileName.h"
#include "support/filetools.h"
#include "support/gzstream.h"
#include "support/lstrings.h"
#include "support/lyxalgo.h"
#include "support/types.h"
#include <functional>
#include <istream>
#include <stack>
#include <vector>
using namespace std;
using namespace lyx::support;
namespace lyx {
//////////////////////////////////////////////////////////////////////
//
// Lexer::Pimpl
//
//////////////////////////////////////////////////////////////////////
///
class Lexer::Pimpl {
public:
///
Pimpl(LexerKeyword * tab, int num);
///
string const getString() const;
///
docstring const getDocString() const;
///
void printError(string const & message) const;
///
void printTable(ostream & os);
///
void pushTable(LexerKeyword * tab, int num);
///
void popTable();
///
bool setFile(FileName const & filename);
///
void setStream(istream & i);
///
void setCommentChar(char c);
///
bool next(bool esc = false);
///
int searchKeyword(char const * const tag) const;
///
int lex();
///
bool eatLine();
///
bool nextToken();
/// test if there is a pushed token or the stream is ok
bool inputAvailable();
///
void pushToken(string const &);
/// fb_ is only used to open files, the stream is accessed through is.
filebuf fb_;
/// gz_ is only used to open files, the stream is accessed through is.
gz::gzstreambuf gz_;
/// the stream that we use.
istream is;
///
string name;
///
LexerKeyword * table;
///
int no_items;
///
string buff;
///
int status;
///
int lineno;
///
string pushTok;
///
char commentChar;
/// used for error messages
string context;
private:
/// non-copyable
Pimpl(Pimpl const &);
void operator=(Pimpl const &);
///
void verifyTable();
///
class PushedTable {
public:
///
PushedTable()
: table_elem(0), table_siz(0) {}
///
PushedTable(LexerKeyword * ki, int siz)
: table_elem(ki), table_siz(siz) {}
///
LexerKeyword * table_elem;
///
int table_siz;
};
///
stack<PushedTable> pushed;
};
namespace {
class CompareTags
: public binary_function<LexerKeyword, LexerKeyword, bool> {
public:
// used by lower_bound, sort and sorted
bool operator()(LexerKeyword const & a, LexerKeyword const & b) const
{
// we use the ascii version, because in turkish, 'i'
// is not the lowercase version of 'I', and thus
// turkish locale breaks parsing of tags.
return compare_ascii_no_case(a.tag, b.tag) < 0;
}
};
} // end of anon namespace
Lexer::Pimpl::Pimpl(LexerKeyword * tab, int num)
: is(&fb_), table(tab), no_items(num),
status(0), lineno(0), commentChar('#')
{
verifyTable();
}
string const Lexer::Pimpl::getString() const
{
return buff;
}
docstring const Lexer::Pimpl::getDocString() const
{
return from_utf8(buff);
}
void Lexer::Pimpl::printError(string const & message) const
{
string const tmpmsg = subst(message, "$$Token", getString());
lyxerr << "LyX: " << tmpmsg << " [around line " << lineno
<< " of file " << to_utf8(makeDisplayPath(name))
<< " current token: '" << getString() << "'"
<< " context: '" << context << "']" << endl;
}
void Lexer::Pimpl::printTable(ostream & os)
{
os << "\nNumber of tags: " << no_items << endl;
for (int i= 0; i < no_items; ++i)
os << "table[" << i
<< "]: tag: `" << table[i].tag
<< "' code:" << table[i].code << '\n';
os.flush();
}
void Lexer::Pimpl::verifyTable()
{
// Check if the table is sorted and if not, sort it.
if (table
&& !lyx::sorted(table, table + no_items, CompareTags())) {
lyxerr << "The table passed to Lexer is not sorted!\n"
<< "Tell the developers to fix it!" << endl;
// We sort it anyway to avoid problems.
lyxerr << "\nUnsorted:" << endl;
printTable(lyxerr);
sort(table, table + no_items, CompareTags());
lyxerr << "\nSorted:" << endl;
printTable(lyxerr);
}
}
void Lexer::Pimpl::pushTable(LexerKeyword * tab, int num)
{
PushedTable tmppu(table, no_items);
pushed.push(tmppu);
table = tab;
no_items = num;
verifyTable();
}
void Lexer::Pimpl::popTable()
{
if (pushed.empty()) {
lyxerr << "Lexer error: nothing to pop!" << endl;
return;
}
PushedTable tmp = pushed.top();
pushed.pop();
table = tmp.table_elem;
no_items = tmp.table_siz;
}
bool Lexer::Pimpl::setFile(FileName const & filename)
{
// Check the format of the file.
string const format = filename.guessFormatFromContents();
if (format == "gzip" || format == "zip" || format == "compress") {
LYXERR(Debug::LYXLEX, "lyxlex: compressed");
// The check only outputs a debug message, because it triggers
// a bug in compaq cxx 6.2, where is_open() returns 'true' for
// a fresh new filebuf. (JMarc)
if (gz_.is_open() || istream::off_type(is.tellg()) > -1)
LYXERR(Debug::LYXLEX, "Error in LyXLex::setFile: "
"file or stream already set.");
gz_.open(filename.toFilesystemEncoding().c_str(), ios::in);
is.rdbuf(&gz_);
name = filename.absFilename();
lineno = 0;
return gz_.is_open() && is.good();
} else {
LYXERR(Debug::LYXLEX, "lyxlex: UNcompressed");
// The check only outputs a debug message, because it triggers
// a bug in compaq cxx 6.2, where is_open() returns 'true' for
// a fresh new filebuf. (JMarc)
if (fb_.is_open() || istream::off_type(is.tellg()) > 0) {
LYXERR(Debug::LYXLEX, "Error in Lexer::setFile: "
"file or stream already set.");
}
fb_.open(filename.toFilesystemEncoding().c_str(), ios::in);
is.rdbuf(&fb_);
name = filename.absFilename();
lineno = 0;
return fb_.is_open() && is.good();
}
}
void Lexer::Pimpl::setStream(istream & i)
{
if (fb_.is_open() || istream::off_type(is.tellg()) > 0) {
LYXERR(Debug::LYXLEX, "Error in Lexer::setStream: "
"file or stream already set.");
}
is.rdbuf(i.rdbuf());
lineno = 0;
}
void Lexer::Pimpl::setCommentChar(char c)
{
commentChar = c;
}
bool Lexer::Pimpl::next(bool esc /* = false */)
{
if (!pushTok.empty()) {
// There can have been a whole line pushed so
// we extract the first word and leaves the rest
// in pushTok. (Lgb)
if (pushTok[0] == '\\' && pushTok.find(' ') != string::npos) {
buff.clear();
pushTok = split(pushTok, buff, ' ');
} else {
buff = pushTok;
pushTok.clear();
}
status = LEX_TOKEN;
return true;
}
unsigned char c = 0; // getc() returns an int
char cc = 0;
status = 0;
while (is && !status) {
is.get(cc);
c = cc;
if (c == commentChar) {
// Read rest of line (fast :-)
#if 1
// That is not fast... (Lgb)
string dummy;
getline(is, dummy);
LYXERR(Debug::LYXLEX, "Comment read: `" << c << dummy << '\'');
#else
// unfortunately ignore is buggy (Lgb)
is.ignore(100, '\n');
#endif
++lineno;
continue;
}
if (c == '\"') {
buff.clear();
if (esc) {
bool escaped = false;
do {
escaped = false;
is.get(cc);
c = cc;
if (c == '\r') continue;
if (c == '\\') {
// escape the next char
is.get(cc);
c = cc;
if (c == '\"' || c == '\\')
escaped = true;
else
buff.push_back('\\');
}
buff.push_back(c);
if (!escaped && c == '\"')
break;
} while (c != '\n' && is);
} else {
do {
is.get(cc);
c = cc;
if (c != '\r')
buff.push_back(c);
} while (c != '\"' && c != '\n' && is);
}
if (c != '\"') {
printError("Missing quote");
if (c == '\n')
++lineno;
}
buff.resize(buff.size() - 1);
status = LEX_DATA;
break;
}
if (c == ',')
continue; /* Skip ','s */
// using relational operators with chars other
// than == and != is not safe. And if it is done
// the type _have_ to be unsigned. It usually a
// lot better to use the functions from cctype
if (c > ' ' && is) {
buff.clear();
do {
if (esc && c == '\\') {
// escape the next char
is.get(cc);
c = cc;
//escaped = true;
}
buff.push_back(c);
is.get(cc);
c = cc;
} while (c > ' ' && c != ',' && is);
status = LEX_TOKEN;
}
if (c == '\r' && is) {
// The Windows support has lead to the
// possibility of "\r\n" at the end of
// a line. This will stop LyX choking
// when it expected to find a '\n'
is.get(cc);
c = cc;
}
if (c == '\n')
++lineno;
}
if (status)
return true;
status = is.eof() ? LEX_FEOF: LEX_UNDEF;
buff.clear();
return false;
}
int Lexer::Pimpl::searchKeyword(char const * const tag) const
{
LexerKeyword search_tag = { tag, 0 };
LexerKeyword * res =
lower_bound(table, table + no_items,
search_tag, CompareTags());
// use the compare_ascii_no_case instead of compare_no_case,
// because in turkish, 'i' is not the lowercase version of 'I',
// and thus turkish locale breaks parsing of tags.
if (res != table + no_items
&& !compare_ascii_no_case(res->tag, tag))
return res->code;
return LEX_UNDEF;
}
int Lexer::Pimpl::lex()
{
//NOTE: possible bug.
if (next() && status == LEX_TOKEN)
return searchKeyword(getString().c_str());
return status;
}
bool Lexer::Pimpl::eatLine()
{
buff.clear();
unsigned char c = '\0';
char cc = 0;
while (is && c != '\n') {
is.get(cc);
c = cc;
//LYXERR(Debug::LYXLEX, "Lexer::EatLine read char: `" << c << '\'');
if (c != '\r')
buff.push_back(c);
}
if (c == '\n') {
++lineno;
buff.resize(buff.size() - 1);
status = LEX_DATA;
return true;
} else if (buff.length() > 0) { // last line
status = LEX_DATA;
return true;
} else {
return false;
}
}
bool Lexer::Pimpl::nextToken()
{
if (!pushTok.empty()) {
// There can have been a whole line pushed so
// we extract the first word and leaves the rest
// in pushTok. (Lgb)
if (pushTok[0] == '\\' && pushTok.find(' ') != string::npos) {
buff.clear();
pushTok = split(pushTok, buff, ' ');
} else {
buff = pushTok;
pushTok.clear();
}
status = LEX_TOKEN;
return true;
}
status = 0;
while (is && !status) {
unsigned char c = 0;
char cc = 0;
is.get(cc);
c = cc;
if ((c >= ' ' || c == '\t') && is) {
buff.clear();
if (c == '\\') { // first char == '\\'
do {
buff.push_back(c);
is.get(cc);
c = cc;
} while (c > ' ' && c != '\\' && is);
} else {
do {
buff.push_back(c);
is.get(cc);
c = cc;
} while ((c >= ' ' || c == '\t') && c != '\\' && is);
}
if (c == '\\')
is.putback(c); // put it back
status = LEX_TOKEN;
}
if (c == '\n')
++lineno;
}
if (status)
return true;
status = is.eof() ? LEX_FEOF: LEX_UNDEF;
buff.clear();
return false;
}
bool Lexer::Pimpl::inputAvailable()
{
return is.good();
}
void Lexer::Pimpl::pushToken(string const & pt)
{
pushTok = pt;
}
//////////////////////////////////////////////////////////////////////
//
// Lexer
//
//////////////////////////////////////////////////////////////////////
Lexer::Lexer()
: pimpl_(new Pimpl(0, 0))
{}
void Lexer::init(LexerKeyword * tab, int num)
{
pimpl_ = new Pimpl(tab, num);
}
Lexer::~Lexer()
{
delete pimpl_;
}
bool Lexer::isOK() const
{
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
return pimpl_->inputAvailable();
}
void Lexer::setLineNumber(int l)
{
pimpl_->lineno = l;
}
int Lexer::lineNumber() const
{
return pimpl_->lineno;
}
istream & Lexer::getStream()
{
return pimpl_->is;
}
void Lexer::pushTable(LexerKeyword * tab, int num)
{
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
{
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
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());
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
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).
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
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);
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
lastReadOk_ = false;
pimpl_->printError("Bad float `$$Token'");
return -1;
}
string const Lexer::getString() const
{
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
lastReadOk_ = pimpl_->status == LEX_DATA || pimpl_->status == LEX_TOKEN;
if (lastReadOk_)
return pimpl_->getString();
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
return string();
}
docstring const Lexer::getDocString() const
{
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
lastReadOk_ = pimpl_->status == LEX_DATA || pimpl_->status == LEX_TOKEN;
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
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;
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
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") {
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
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
{
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
return !lastReadOk_;
}
Lexer & Lexer::operator>>(string & s)
{
if (isOK()) {
next();
s = getString();
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
} else {
lastReadOk_ = false;
}
return *this;
}
Lexer & Lexer::operator>>(docstring & s)
{
if (isOK()) {
next();
s = getDocString();
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
} else {
lastReadOk_ = false;
}
return *this;
}
Lexer & Lexer::operator>>(double & s)
{
if (isOK()) {
next();
s = getFloat();
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
} else {
lastReadOk_ = false;
}
return *this;
}
Lexer & Lexer::operator>>(int & s)
{
if (isOK()) {
next();
s = getInteger();
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
} else {
lastReadOk_ = false;
}
return *this;
}
Lexer & Lexer::operator>>(unsigned int & s)
{
if (isOK()) {
next();
s = getInteger();
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
} else {
lastReadOk_ = false;
}
return *this;
}
Lexer & Lexer::operator>>(bool & s)
{
if (isOK()) {
next();
s = getBool();
Fix bug 3293 by Bernhard Roider: This changes the semantics of isOK() and operator(), comments from Bernhard below: With the old version of lyxlex it was _impossible_ to check whether reading an integer, float, ... succeeded or not. The current solution to check for is.bad() in some cases and in other cases use is.good() does not give the desired information. Moreover the result of is.bad() depends on the stl implementation and behaves different for linux and windows. the bug was introduced by the patch that fixed the bug that crashed lyx when "inset-insert ert" was executed from the command buffer. The lexer has the method isOK() which reflects the status of the stream is. The operators void* and ! are not really well defined (they depend on the value of is.bad()). What is missing is a test if the last reading operation was successful and thus the returned value is valid. That's what i implemented in this patch. The new rule for using the lexer: if you want to know if the lexer still has data to read (either from the stream or from the pushed token) then use "lex.isOK()". If you want to test if the last reading operation was successful then use eg. "if (lex) {...}" or unsuccessful then use eg. "if (!lex) {...}" an example: int readParam(LyxLex &lex) { int param = 1; // default value if (lex.isOK()) { // the lexer has data to read int p; // temporary variable lex >> p; if (lex) param = p; // only use the input if the reading operation was successful } return param; } git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17569 a592a061-630c-0410-9148-cb99ea01b6c8
2007-03-26 13:43:49 +00:00
} 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