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Some refactoring of the preprocessor, it'll simplify my next commits.

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This commit is contained in:
Roberto Raggi
2009-03-02 19:03:07 +01:00
parent f96d8ff9e0
commit ebe17889f4
4 changed files with 228 additions and 196 deletions
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93
src/libs/cplusplus/pp-engine.cpp
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@@ -50,6 +50,8 @@
#include <Lexer.h>
#include <Token.h>
#include <Literals.h>
#include <QtDebug>
#include <algorithm>
@@ -450,7 +452,8 @@ private:
Preprocessor::Preprocessor(Client *client, Environment &env)
: client(client),
env(env),
expand(env)
_expand(env),
_result(0)
{
resetIfLevel ();
}
@@ -501,13 +504,23 @@ void Preprocessor::preprocess(const QByteArray &filename,
QByteArray *result)
{
const QByteArray previousFile = env.currentFile;
env.currentFile = filename;
preprocess(source, result);
env.currentFile = previousFile;
}
void Preprocessor::expand(const QByteArray &source, QByteArray *result)
{
_expand(source, result);
}
void Preprocessor::expand(const char *first, const char *last, QByteArray *result)
{
const QByteArray source = QByteArray::fromRawData(first, last - first);
return expand(source, result);
}
Preprocessor::State Preprocessor::createStateFromSource(const QByteArray &source) const
{
State state;
@@ -525,6 +538,9 @@ Preprocessor::State Preprocessor::createStateFromSource(const QByteArray &source
void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
{
QByteArray *previousResult = _result;
_result = result;
pushState(createStateFromSource(source));
const unsigned previousCurrentLine = env.currentLine;
@@ -533,16 +549,16 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
while (true) {
if (env.currentLine != _dot->lineno) {
if (env.currentLine > _dot->lineno) {
result->append("\n# ");
result->append(QByteArray::number(_dot->lineno));
result->append(' ');
result->append('"');
result->append(env.currentFile);
result->append('"');
result->append('\n');
_result->append("\n# ");
_result->append(QByteArray::number(_dot->lineno));
_result->append(' ');
_result->append('"');
_result->append(env.currentFile);
_result->append('"');
_result->append('\n');
} else {
for (unsigned i = env.currentLine; i < _dot->lineno; ++i)
result->append('\n');
_result->append('\n');
}
env.currentLine = _dot->lineno;
}
@@ -580,12 +596,12 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
} while (_dot->isNot(T_EOF_SYMBOL) && (_dot->joined || ! _dot->newline));
} else {
if (_dot->joined)
result->append("\\\n");
_result->append("\\\n");
else if (_dot->whitespace)
result->append(' ');
_result->append(' ');
if (_dot->isNot(T_IDENTIFIER)) {
result->append(tokenSpell(*_dot));
_result->append(tokenSpell(*_dot));
++_dot;
} else {
const TokenIterator identifierToken = _dot;
@@ -599,7 +615,7 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
client->startExpandingMacro(identifierToken->offset,
trivial, spell);
expand(spell.constBegin(), spell.constEnd(), result);
expand(spell, _result);
if (client)
client->stopExpandingMacro(_dot->offset, trivial);
@@ -609,7 +625,7 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
Macro *m = env.resolve(spell);
if (! m) {
result->append(spell);
_result->append(spell);
} else {
if (! m->isFunctionLike()) {
if (_dot->isNot(T_LPAREN)) {
@@ -618,7 +634,7 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
*m, spell);
m->setHidden(true);
expand(m->definition(), result);
expand(m->definition(), _result);
m->setHidden(false);
if (client)
@@ -650,7 +666,7 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
popState();
if (! m) {
result->append(tmp);
_result->append(tmp);
continue;
}
}
@@ -659,7 +675,7 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
// collect the actual arguments
if (_dot->isNot(T_LPAREN)) {
// ### warnng expected T_LPAREN
result->append(m->name());
_result->append(m->name());
continue;
}
@@ -689,7 +705,7 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
*m, text);
}
expand(beginOfText, endOfText, result);
expand(beginOfText, endOfText, _result);
if (client)
client->stopExpandingMacro(_dot->offset, *m);
@@ -701,6 +717,7 @@ void Preprocessor::preprocess(const QByteArray &source, QByteArray *result)
popState();
env.currentLine = previousCurrentLine;
_result = previousResult;
}
const char *Preprocessor::startOfToken(const Token &token) const
@@ -788,9 +805,8 @@ QVector<Token> Preprocessor::tokenize(const QByteArray &text) const
return tokens;
}
void Preprocessor::processInclude(bool,
TokenIterator firstToken, TokenIterator lastToken,
bool acceptMacros)
void Preprocessor::processInclude(bool, TokenIterator firstToken,
TokenIterator lastToken, bool acceptMacros)
{
RangeLexer tk(firstToken, lastToken);
++tk; // skip T_POUND
@@ -1011,7 +1027,8 @@ void Preprocessor::processEndif(TokenIterator, TokenIterator)
}
void Preprocessor::processIfdef(bool checkUndefined,
TokenIterator firstToken, TokenIterator lastToken)
TokenIterator firstToken,
TokenIterator lastToken)
{
RangeLexer tk(firstToken, lastToken);
@@ -1054,47 +1071,47 @@ void Preprocessor::resetIfLevel ()
_true_test[iflevel] = false;
}
Preprocessor::PP_DIRECTIVE_TYPE Preprocessor::classifyDirective (const QByteArray &__directive) const
Preprocessor::PP_DIRECTIVE_TYPE Preprocessor::classifyDirective(const QByteArray &directive) const
{
switch (__directive.size())
switch (directive.size())
{
case 2:
if (__directive[0] == 'i' && __directive[1] == 'f')
if (directive[0] == 'i' && directive[1] == 'f')
return PP_IF;
break;
case 4:
if (__directive[0] == 'e' && __directive == "elif")
if (directive[0] == 'e' && directive == "elif")
return PP_ELIF;
else if (__directive[0] == 'e' && __directive == "else")
else if (directive[0] == 'e' && directive == "else")
return PP_ELSE;
break;
case 5:
if (__directive[0] == 'i' && __directive == "ifdef")
if (directive[0] == 'i' && directive == "ifdef")
return PP_IFDEF;
else if (__directive[0] == 'u' && __directive == "undef")
else if (directive[0] == 'u' && directive == "undef")
return PP_UNDEF;
else if (__directive[0] == 'e' && __directive == "endif")
else if (directive[0] == 'e' && directive == "endif")
return PP_ENDIF;
break;
case 6:
if (__directive[0] == 'i' && __directive == "ifndef")
if (directive[0] == 'i' && directive == "ifndef")
return PP_IFNDEF;
else if (__directive[0] == 'i' && __directive == "import")
else if (directive[0] == 'i' && directive == "import")
return PP_IMPORT;
else if (__directive[0] == 'd' && __directive == "define")
else if (directive[0] == 'd' && directive == "define")
return PP_DEFINE;
break;
case 7:
if (__directive[0] == 'i' && __directive == "include")
if (directive[0] == 'i' && directive == "include")
return PP_INCLUDE;
break;
case 12:
if (__directive[0] == 'i' && __directive == "include_next")
if (directive[0] == 'i' && directive == "include_next")
return PP_INCLUDE_NEXT;
break;
@@ -1117,7 +1134,7 @@ int Preprocessor::skipping() const
{ return _skipping[iflevel]; }
Value Preprocessor::evalExpression(TokenIterator firstToken, TokenIterator lastToken,
const QByteArray &source) const
const QByteArray &source) const
{
ExpressionEvaluator eval(&env);
const Value result = eval(firstToken, lastToken, source);