void V3PreProcImp::openFile(FileLine* fl, V3InFilter* filterp, const string& filename) {
// Open a new file, possibly overriding the current one which is active.
V3File::addSrcDepend(filename);
// Read a list<string> with the whole file.
StrList wholefile;
bool ok = filterp->readWholefile(filename, wholefile/*ref*/);
if (!ok) {
error("File not found: "+filename+"\n");
return;
}
if (!m_preprocp->isEof()) { // IE not the first file.
// We allow the same include file twice, because occasionally it pops
// up, with guards preventing a real recursion.
if (m_lexp->m_streampStack.size()>V3PreProc::INCLUDE_DEPTH_MAX) {
error("Recursive inclusion of file: "+filename);
return;
}
// There's already a file active. Push it to work on the new one.
addLineComment(0);
}
// Create new stream structure
m_lexp->scanNewFile(m_preprocp->fileline()->create(filename, 1));
addLineComment(1); // Enter
// Filter all DOS CR's en-mass. This avoids bugs with lexing CRs in the wrong places.
// This will also strip them from strings, but strings aren't supposed to be multi-line without a "\"
for (StrList::iterator it=wholefile.begin(); it!=wholefile.end(); ++it) {
// We don't end-loop at \0 as we allow and strip mid-string '\0's (for now).
bool strip = false;
const char* sp = it->data();
const char* ep = sp + it->length();
// Only process if needed, as saves extra string allocations
for (const char* cp=sp; cp<ep; cp++) {
if (VL_UNLIKELY(*cp == '\r' || *cp == '\0')) {
strip = true; break;
}
}
if (strip) {
string out; out.reserve(it->length());
for (const char* cp=sp; cp<ep; cp++) {
if (!(*cp == '\r' || *cp == '\0')) {
out += *cp;
}
}
*it = out;
}
// Push the data to an internal buffer.
m_lexp->scanBytesBack(*it);
// Reclaim memory; the push saved the string contents for us
*it = "";
}
}
bool preproc (FileLine* fl, const string& modname, V3InFilter* filterp, V3ParseImp* parsep,
const string& errmsg) { // "" for no error
debug(true); // Recheck if debug on - first check was before command line passed
// Preprocess the given module, putting output in vppFilename
UINFONL(1," Preprocessing "<<modname<<endl);
// Preprocess
s_filterp = filterp;
bool ok = preprocOpen(fl, s_filterp, modname, errmsg);
if (!ok) return false;
while (!s_preprocp->isEof()) {
string line = s_preprocp->getline();
V3Parse::ppPushText(parsep, line);
}
return true;
}