void CxxPreProcessor::Parse(const wxFileName& filename, size_t options)
{
CxxPreProcessorScanner* scanner = NULL;
try {
CL_DEBUG("Calling CxxPreProcessor::Parse for file '%s'\n", filename.GetFullPath());
m_options = options;
scanner = new CxxPreProcessorScanner(filename, m_options);
// Remove the option so recursive scanner won't get it
m_options &= ~kLexerOpt_DontCollectMacrosDefinedInThisFile;
if(scanner && !scanner->IsNull()) {
scanner->Parse(this);
}
} catch(CxxLexerException& e) {
wxUnusedVar(e);
}
// Delete all the 'deleteOnExit' tokens
CxxPreProcessorToken::Map_t filteredMap;
CxxPreProcessorToken::Map_t::iterator iter = m_tokens.begin();
for(; iter != m_tokens.end(); ++iter) {
if(!iter->second.deleteOnExit) {
filteredMap.insert(std::make_pair(iter->first, iter->second));
}
}
m_tokens.swap(filteredMap);
// Make sure that the scanner is deleted
wxDELETE(scanner);
}
void CxxPreProcessorScanner::Parse(CxxPreProcessor* pp) throw(CxxLexerException)
{
CxxLexerToken token;
bool searchingForBranch = false;
CxxPreProcessorToken::Map_t& ppTable = pp->GetTokens();
while(::LexerNext(m_scanner, token)) {
// Pre Processor state
switch(token.type) {
case T_PP_INCLUDE_FILENAME: {
// we found an include statement, recurse into it
wxFileName include;
if(pp->ExpandInclude(m_filename, token.text, include)) {
CxxPreProcessorScanner* scanner = new CxxPreProcessorScanner(include, pp->GetOptions());
try {
scanner->Parse(pp);
} catch(CxxLexerException& e) {
// catch the exception
CL_DEBUG("Exception caught: %s\n", e.message);
}
// make sure we always delete the scanner
wxDELETE(scanner);
DEBUGMSG("<== Resuming parser on file: %s\n", m_filename.GetFullPath());
}
break;
}
case T_PP_IFDEF: {
searchingForBranch = true;
// read the identifier
ReadUntilMatch(T_PP_IDENTIFIER, token);
if(IsTokenExists(ppTable, token)) {
DEBUGMSG("=> ifdef condition is TRUE (line: %d)\n", token.lineNumber);
searchingForBranch = false;
// condition is true
Parse(pp);
} else {
DEBUGMSG("=> ifdef condition is FALSE (line: %d)\n", token.lineNumber);
// skip until we find the next:
// else, elif, endif (but do not consume these tokens)
if(!ConsumeCurrentBranch()) return;
}
break;
}
case T_PP_IFNDEF: {
searchingForBranch = true;
// read the identifier
ReadUntilMatch(T_PP_IDENTIFIER, token);
if(!IsTokenExists(ppTable, token)) {
DEBUGMSG("=> ifndef condition is TRUE (line: %d)\n", token.lineNumber);
searchingForBranch = false;
// condition is true
Parse(pp);
} else {
DEBUGMSG("=> ifndef condition is FALSE (line: %d)\n", token.lineNumber);
// skip until we find the next:
// else, elif, endif (but do not consume these tokens)
if(!ConsumeCurrentBranch()) return;
}
break;
}
case T_PP_IF:
searchingForBranch = true;
case T_PP_ELIF: {
if(searchingForBranch) {
// We expect a condition
if(!CheckIf(ppTable)) {
DEBUGMSG("=> if condition is FALSE (line: %d)\n", token.lineNumber);
// skip until we find the next:
// else, elif, endif (but do not consume these tokens)
if(!ConsumeCurrentBranch()) return;
} else {
DEBUGMSG("=> if condition is TRUE (line: %d)\n", token.lineNumber);
searchingForBranch = false;
// condition is true
Parse(pp);
}
} else {
ConsumeBlock();
return;
}
break;
}
case T_PP_ELSE: {
if(searchingForBranch) {
// if we reached an else, it means that we could not match
// a if/elif/ifdef condition until now - enter it
Parse(pp);
searchingForBranch = false;
} else {
// we already found the branch for the current block
// this means that the 'else' is a stop sign for us
ConsumeBlock();
return;
}
break;
}
case T_PP_ENDIF: {
return;
}
case T_PP_DEFINE: {
if(!::LexerNext(m_scanner, token) || token.type != T_PP_IDENTIFIER) {
// Recover
wxString dummy;
GetRestOfPPLine(dummy);
break;
}
wxString macroName = token.text;
wxString macroValue;
// Optionally get the value
GetRestOfPPLine(macroValue, m_options & kLexerOpt_CollectMacroValueNumbers);
CxxPreProcessorToken pp;
pp.name = macroName;
pp.value = macroValue;
// mark this token for deletion when the entire TU parsing is done
pp.deleteOnExit = (m_options & kLexerOpt_DontCollectMacrosDefinedInThisFile);
DEBUGMSG("=> Adding macro: %s=%s (line %d)\n", pp.name, pp.value, token.lineNumber);
ppTable.insert(std::make_pair(pp.name, pp));
break;
}
}
}
}
