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#include "CxxTokenizer.h"
#include <stack>
#include "CxxScannerTokens.h"
#define SCP_STATE_NORMAL 0
#define SCP_STATE_IN_IF 1
#define SCP_STATE_IN_WHILE 2
#define SCP_STATE_IN_FOR 3
#define SCP_STATE_IN_CATCH 4
#define SCP_STATE_IN_FOR_NO_SEMICOLON 5
CxxTokenizer::CxxTokenizer()
: m_scanner(nullptr)
{
}
CxxTokenizer::~CxxTokenizer()
{
if(m_scanner) {
::LexerDestroy(&m_scanner);
}
}
bool CxxTokenizer::NextToken(CxxLexerToken& token)
{
if(!m_scanner) return false;
m_lastToken = token;
return ::LexerNext(m_scanner, token);
}
void CxxTokenizer::Reset(const wxString& buffer)
{
if(m_scanner) {
::LexerDestroy(&m_scanner);
}
if(!buffer.empty()) {
m_buffer = buffer;
m_scanner = ::LexerNew(buffer, 0);
}
}
bool CxxTokenizer::ReadUntilClosingBracket(int delim, wxString& bufferRead)
{
CxxLexerToken tok;
int depth = 0;
while(NextToken(tok)) {
if(IsInPreProcessorSection()) {
// pre-processor tokens
continue;
}
switch(tok.GetType()) {
case '<':
case '(':
case '[':
case '{':
depth++;
bufferRead << tok.GetWXString() << " ";
break;
case '>':
case ')':
case ']':
case '}':
depth--;
bufferRead << tok.GetWXString() << " ";
if((tok.GetType() == delim) && (depth == 0)) {
::LexerUnget(m_scanner);
return true;
}
break;
default:
bufferRead << tok.GetWXString() << " ";
break;
}
}
return false;
}
int CxxTokenizer::PeekToken(wxString& text)
{
CxxLexerToken tok;
if(!NextToken(tok)) {
return false;
}
text = tok.GetWXString();
int type = tok.GetType();
::LexerUnget(m_scanner);
return type;
}
wxString CxxTokenizer::GetVisibleScope(const wxString& inputString)
{
std::stack<wxString> scopes;
Reset(inputString);
CxxLexerToken token;
wxString currentScope;
int parenthesisDepth = 0;
int state = SCP_STATE_NORMAL;
CppLexerUserData *scannerData = GetUserData();
while(NextToken(token)) {
// Skip pre-processor block
if(scannerData && scannerData->IsInPreProcessorSection()) {
continue;
}
switch(state) {
case SCP_STATE_NORMAL:
switch(token.GetType()) {
case T_PP_STATE_EXIT:
break;
case '{':
currentScope << "{";
scopes.push(currentScope);
currentScope.clear();
break;
case '}':
if(scopes.empty()) return ""; // Invalid braces count
currentScope = scopes.top();
scopes.pop();
currentScope << "} ";
break;
case T_IF:
state = SCP_STATE_IN_IF;
currentScope << " if ";
break;
case T_WHILE:
state = SCP_STATE_IN_WHILE;
currentScope << " while ";
break;
case T_FOR:
state = SCP_STATE_IN_FOR_NO_SEMICOLON;
currentScope << ";";
break;
case T_CATCH:
state = SCP_STATE_IN_CATCH;
currentScope << ";";
break;
case '(':
parenthesisDepth++;
currentScope << "(";
// Handle lambda
// If we are enterting lamda function defenition, collect the locals
// this is exactly what we in 'catch' hence the state change to SCP_STATE_IN_CATCH
if(GetLastToken().GetType() == ']') {
state = SCP_STATE_IN_CATCH;
}
break;
case ')':
parenthesisDepth--;
currentScope << ")";
break;
default:
if(parenthesisDepth == 0) {
currentScope << " " << token.GetWXString();
}
break;
}
break;
case SCP_STATE_IN_WHILE:
case SCP_STATE_IN_IF:
switch(token.GetType()) {
case '(':
parenthesisDepth++;
currentScope << "(";
break;
case ')':
parenthesisDepth--;
currentScope << ")";
if(parenthesisDepth == 0) {
state = SCP_STATE_NORMAL;
}
break;
}
break;
case SCP_STATE_IN_FOR_NO_SEMICOLON:
switch(token.GetType()) {
case '(':
parenthesisDepth++;
currentScope << "(";
break;
case ')':
parenthesisDepth--;
currentScope << ")";
if(parenthesisDepth == 0) {
state = SCP_STATE_NORMAL;
}
break;
case ';':
currentScope << ";";
state = SCP_STATE_IN_FOR;
break;
default:
currentScope << " " << token.GetWXString();
break;
}
break;
case SCP_STATE_IN_FOR:
switch(token.GetType()) {
case '(':
parenthesisDepth++;
currentScope << "(";
break;
case ')':
parenthesisDepth--;
currentScope << ")";
if(parenthesisDepth == 0) {
state = SCP_STATE_NORMAL;
}
break;
default:
break;
}
break;
case SCP_STATE_IN_CATCH:
switch(token.GetType()) {
case '(':
currentScope << "(";
parenthesisDepth++;
break;
case ')':
parenthesisDepth--;
currentScope << ")";
if(parenthesisDepth == 0) {
state = SCP_STATE_NORMAL;
}
break;
default:
currentScope << " " << token.GetWXString();
break;
}
break;
default:
break;
}
}
wxString s;
while(!scopes.empty()) {
s.Prepend(scopes.top());
scopes.pop();
}
s << currentScope;
return s;
}
CppLexerUserData* CxxTokenizer::GetUserData() const
{
if(!m_scanner) return NULL;
return ::LexerGetUserData(m_scanner);
}
bool CxxTokenizer::IsInPreProcessorSection() const
{
if(!GetUserData()) return false;
return GetUserData()->IsInPreProcessorSection();
}
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