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break parser::tokenize in parts

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@27454 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Jean-Marc Lasgouttes 2008-11-15 14:38:27 +00:00
parent 0aaed41dd7
commit fa3ea10057
2 changed files with 80 additions and 71 deletions
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149
src/tex2lyx/Parser.cpp
View File

@ -351,6 +351,82 @@ string const Parser::verbatimEnvironment(string const & name)
}
void Parser::tokenize_one(istream & is)
{
char c;
if (!is.get(c))
return;
//cerr << "reading c: " << c << "\n";
switch (catcode(c)) {
case catSpace: {
string s(1, c);
while (is.get(c) && catcode(c) == catSpace)
s += c;
if (catcode(c) != catSpace)
is.putback(c);
push_back(Token(s, catSpace));
break;
}
case catNewline: {
++lineno_;
string s(1, getNewline(is, c));
while (is.get(c) && catcode(c) == catNewline) {
++lineno_;
s += getNewline(is, c);
}
if (catcode(c) != catNewline)
is.putback(c);
push_back(Token(s, catNewline));
break;
}
case catComment: {
// We don't treat "%\n" combinations here specially because
// we want to preserve them in the preamble
string s;
while (is.get(c) && catcode(c) != catNewline)
s += c;
// handle possible DOS line ending
if (catcode(c) == catNewline)
c = getNewline(is, c);
// Note: The '%' at the beginning and the '\n' at the end
// of the comment are not stored.
++lineno_;
push_back(Token(s, catComment));
break;
}
case catEscape: {
is.get(c);
if (!is) {
error("unexpected end of input");
} else {
string s(1, c);
if (catcode(c) == catLetter) {
// collect letters
while (is.get(c) && catcode(c) == catLetter)
s += c;
if (catcode(c) != catLetter)
is.putback(c);
}
push_back(Token(s, catEscape));
}
break;
}
case catIgnore: {
cerr << "ignoring a char: " << int(c) << "\n";
break;
}
default:
push_back(Token(c, catcode(c)));
}
}
void Parser::tokenize(istream & is)
{
static bool init_done = false;
@ -360,77 +436,8 @@ void Parser::tokenize(istream & is)
init_done = true;
}
char c;
while (is.get(c)) {
//cerr << "reading c: " << c << "\n";
switch (catcode(c)) {
case catSpace: {
string s(1, c);
while (is.get(c) && catcode(c) == catSpace)
s += c;
if (catcode(c) != catSpace)
is.putback(c);
push_back(Token(s, catSpace));
break;
}
case catNewline: {
++lineno_;
string s(1, getNewline(is, c));
while (is.get(c) && catcode(c) == catNewline) {
++lineno_;
s += getNewline(is, c);
}
if (catcode(c) != catNewline)
is.putback(c);
push_back(Token(s, catNewline));
break;
}
case catComment: {
// We don't treat "%\n" combinations here specially because
// we want to preserve them in the preamble
string s;
while (is.get(c) && catcode(c) != catNewline)
s += c;
// handle possible DOS line ending
if (catcode(c) == catNewline)
c = getNewline(is, c);
// Note: The '%' at the beginning and the '\n' at the end
// of the comment are not stored.
++lineno_;
push_back(Token(s, catComment));
break;
}
case catEscape: {
is.get(c);
if (!is) {
error("unexpected end of input");
} else {
string s(1, c);
if (catcode(c) == catLetter) {
// collect letters
while (is.get(c) && catcode(c) == catLetter)
s += c;
if (catcode(c) != catLetter)
is.putback(c);
}
push_back(Token(s, catEscape));
}
break;
}
case catIgnore: {
cerr << "ignoring a char: " << int(c) << "\n";
break;
}
default:
push_back(Token(c, catcode(c)));
}
}
while (is)
tokenize_one(is);
}

2
src/tex2lyx/Parser.h
View File

@ -174,6 +174,8 @@ public:
char getChar();
///
void error(std::string const & msg);
/// Parses one token from \p is
void tokenize_one(std::istream & is);
/// Parses \p is into tokens
void tokenize(std::istream & is);
///