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#include "CxxPreProcessorCache.h"
#include "CxxLexerAPI.h"
#include "CxxScannerTokens.h"
CxxPreProcessorCache::CxxPreProcessorCache() {}
CxxPreProcessorCache::~CxxPreProcessorCache() {}
bool CxxPreProcessorCache::Find(const wxString& filename,
const wxString& project,
const wxString& config,
wxArrayString& definitions)
{
wxString key;
key << project << "|" << config << "|" << filename;
CxxPreProcessorCache::Map_t::iterator iter = m_impl.find(key);
if(iter == m_impl.end()) return false;
if(wxFileName(filename).GetModificationTime().GetTicks() > iter->second.lastUpdated) {
// the file file was saved since we last cached it
// Next:
// Check if the cached entry preabmle is the same as the current file
wxString currentPreamble = GetPreamble(filename);
wxString cachedPreamble = iter->second.preamble;
if(cachedPreamble == currentPreamble) {
// no change was done to the preamble
definitions = iter->second.definitions;
return true;
} else {
// preamble was modified - we need to re-cache it
// remove the current cache and return false
m_impl.erase(iter);
return false;
}
} else {
// the file was not saved since we cached it
definitions = iter->second.definitions;
return false;
}
}
void CxxPreProcessorCache::Clear() { m_impl.clear(); }
wxString CxxPreProcessorCache::GetPreamble(const wxString& filename) const
{
Scanner_t scanner = ::LexerNew(filename, 0);
if(!scanner) return { "" };
CxxLexerToken token;
wxString preamble;
while(::LexerNext(scanner, token)) {
if(token.GetType() == T_PP_INCLUDE_FILENAME) {
preamble << token.GetText() << "\n";
}
}
::LexerDestroy(&scanner);
preamble.Trim();
return preamble;
}
bool CxxPreProcessorCache::Insert(const wxString& filename,
const wxString& project,
const wxString& config,
const wxArrayString& definitions)
{
wxString key;
key << project << "|" << config << "|" << filename;
// remove old entry
CxxPreProcessorCache::Map_t::iterator iter = m_impl.find(key);
if(iter != m_impl.end()) m_impl.erase(iter);
CacheEntry entry;
entry.config = config;
entry.definitions = definitions;
entry.lastUpdated = time(NULL); // Now
entry.filename = filename;
entry.project = project;
entry.preamble = GetPreamble(filename);
m_impl.insert(std::make_pair(key, entry));
return true;
}
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