mirror of
https://github.com/panda3d/panda3d.git
synced 2025-10-04 19:08:55 -04:00
cppparser: Minor performance improvements
This commit is contained in:
rdb
parent
12a188b116
commit
4430f16cda
@ -439,10 +439,11 @@ get_verbose() const {
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*/
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void CPPPreprocessor::
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copy_filepos(const CPPPreprocessor &other) {
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assert(!_files.empty());
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_files.back()._file = other.get_file();
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_files.back()._line_number = other.get_line_number();
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_files.back()._col_number = other.get_col_number();
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InputFile *infile = _infile;
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assert(infile != nullptr);
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infile->_file = other.get_file();
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infile->_line_number = other.get_line_number();
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infile->_col_number = other.get_col_number();
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}
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/**
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@ -450,10 +451,12 @@ copy_filepos(const CPPPreprocessor &other) {
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*/
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CPPFile CPPPreprocessor::
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get_file() const {
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if (_files.empty()) {
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InputFile *infile = _infile;
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if (infile != nullptr) {
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return infile->_file;
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} else {
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return CPPFile("");
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}
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return _files.back()._file;
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}
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/**
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@ -461,10 +464,12 @@ get_file() const {
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*/
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int CPPPreprocessor::
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get_line_number() const {
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if (_files.empty()) {
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InputFile *infile = _infile;
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if (infile != nullptr) {
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return infile->_line_number;
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} else {
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return 0;
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}
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return _files.back()._line_number;
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}
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/**
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@ -472,10 +477,12 @@ get_line_number() const {
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*/
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int CPPPreprocessor::
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get_col_number() const {
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if (_files.empty()) {
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InputFile *infile = _infile;
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if (infile != nullptr) {
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return infile->_col_number;
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} else {
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return 0;
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}
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return _files.back()._col_number;
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}
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/**
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@ -486,7 +493,7 @@ get_next_token() {
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#ifdef CPP_VERBOSE_LEX
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CPPToken tok = get_next_token0();
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< _token_index++ << ". " << tok << "\n";
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return tok;
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}
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@ -668,7 +675,7 @@ void CPPPreprocessor::
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warning(const string &message, const YYLTYPE &loc) const {
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if (_verbose >= 2) {
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if (_verbose >= 3) {
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indent(cerr, _files.size() * 2);
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indent(cerr, get_file_depth() * 2);
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}
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if (!loc.file.empty()) {
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@ -717,7 +724,7 @@ error(const string &message, const YYLTYPE &loc) const {
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if (_verbose >= 1) {
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if (_verbose >= 3) {
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indent(cerr, _files.size() * 2);
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indent(cerr, get_file_depth() * 2);
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}
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if (!loc.file.empty()) {
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@ -734,31 +741,31 @@ error(const string &message, const YYLTYPE &loc) const {
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cerr << " error: " << message << "\n";
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show_line(loc);
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if (!_files.empty() && !loc.file.empty()) {
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Files::const_reverse_iterator rit;
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for (rit = _files.rbegin();
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rit != _files.rend() && (*rit)._file == loc.file && (*rit)._manifest != nullptr;
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++rit) {
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InputFile *infile = _infile;
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if (infile != nullptr && !loc.file.empty()) {
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// Add all the expansions to a vector for easy reverse iteration.
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std::vector<InputFile *> infiles;
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while (infile != nullptr && infile->_file == loc.file && infile->_manifest != nullptr) {
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infiles.push_back(infile);
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infile = infile->_parent;
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}
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if (rit != _files.rbegin() && rit != _files.rend()) {
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--rit;
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const InputFile &infile = *rit;
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if (!infiles.empty()) {
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auto rit = infiles.rbegin();
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if (_verbose >= 3) {
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cerr << "Expansion of " << infile._manifest->_name << ":\n";
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cerr << " -> " << trim_blanks(infile._input) << "\n";
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while (rit != _files.rbegin()) {
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--rit;
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const InputFile &infile = *rit;
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cerr << " -> " << trim_blanks(infile._input) << "\n";
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cerr << "Expansion of " << (*rit)->_manifest->_name << ":\n";
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while (rit != infiles.rend()) {
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cerr << " -> " << trim_blanks((*rit)->_input) << "\n";
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++rit;
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}
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}
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else {
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cerr << "with " << infile._manifest->_name;
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if (infile._manifest->_has_parameters) {
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cerr << "with " << (*rit)->_manifest->_name;
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if ((*rit)->_manifest->_has_parameters) {
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cerr << "()";
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}
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cerr << " expanded to: " << trim_blanks(_files.back()._input) << "\n";
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cerr << " expanded to: " << trim_blanks(_infile->_input) << "\n";
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}
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cerr << std::endl;
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}
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}
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@ -781,7 +788,7 @@ show_line(const YYLTYPE &loc) const {
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int indent_level = 0;
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if (_verbose >= 3) {
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indent_level = _files.size() * 2;
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indent_level = get_file_depth() * 2;
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}
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// Seek to the offending line in the file.
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@ -940,25 +947,26 @@ init_type(const string &type) {
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bool CPPPreprocessor::
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push_file(const CPPFile &file) {
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if (_verbose >= 3) {
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Reading " << file << "\n";
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}
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assert(_last_c == 0);
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_files.push_back(InputFile());
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InputFile &infile = _files.back();
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InputFile *infile = new InputFile;
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if (infile->open(file)) {
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infile->_parent = _infile;
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_infile = infile;
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if (infile.open(file)) {
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// Record the fact that we opened the file for the benefit of user code.
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_parsed_files.insert(file);
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infile._prev_last_c = _last_c;
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infile->_prev_last_c = _last_c;
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_last_c = '\0';
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_start_of_line = true;
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return true;
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}
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_files.pop_back();
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delete infile;
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return false;
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}
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@ -968,25 +976,26 @@ push_file(const CPPFile &file) {
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bool CPPPreprocessor::
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push_string(const string &input) {
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Pushing to string \"" << input
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<< "\"\n";
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#endif
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_files.push_back(InputFile());
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InputFile &infile = _files.back();
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if (infile.connect_input(input)) {
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infile._prev_last_c = _last_c;
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InputFile *infile = new InputFile;
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if (infile->connect_input(input)) {
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infile->_prev_last_c = _last_c;
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infile->_parent = _infile;
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_infile = infile;
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_last_c = '\0';
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return true;
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}
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Unable to read string\n";
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#endif
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_files.pop_back();
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delete infile;
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return false;
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}
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@ -996,37 +1005,38 @@ push_string(const string &input) {
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bool CPPPreprocessor::
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push_expansion(const string &input, const CPPManifest *manifest, const YYLTYPE &loc) {
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Pushing to expansion \"" << input
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<< "\"\n";
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#endif
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_files.push_back(InputFile());
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InputFile &infile = _files.back();
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if (infile.connect_input(input)) {
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infile._manifest = manifest;
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infile._file = loc.file;
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infile._line_number = loc.first_line;
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infile._col_number = loc.first_column;
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infile._lock_position = true;
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InputFile *infile = new InputFile;
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if (infile->connect_input(input)) {
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infile->_manifest = manifest;
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infile->_file = loc.file;
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infile->_line_number = loc.first_line;
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infile->_col_number = loc.first_column;
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infile->_lock_position = true;
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if (!manifest->_has_parameters) {
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// If the manifest does not use arguments, then disallow recursive
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// expansion.
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infile._ignore_manifest = true;
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infile->_ignore_manifest = true;
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}
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infile._prev_last_c = _last_c;
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infile->_prev_last_c = _last_c;
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infile->_parent = _infile;
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_infile = infile;
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_last_c = '\0';
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return true;
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}
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Unable to read expansion\n";
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#endif
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_files.pop_back();
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delete infile;
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return false;
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}
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@ -1647,7 +1657,7 @@ process_directive(int c) {
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loc.last_column = 0;
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "#" << command << " " << args << "\n";
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#endif
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@ -1870,7 +1880,7 @@ handle_include_directive(const string &args, const YYLTYPE &loc) {
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if (expr[0] == '"' && expr[expr.size() - 1] == '"') {
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filename = expr.substr(1, expr.size() - 2);
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if (_files.size() == 1) {
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if (_infile->_parent == nullptr) {
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// If we're currently processing a top-level file, record the include
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// directive. We don't need to record includes from included files.
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_quote_includes.insert(filename);
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@ -1884,7 +1894,7 @@ handle_include_directive(const string &args, const YYLTYPE &loc) {
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angle_quotes = true;
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}
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if (_files.size() == 1) {
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if (_infile->_parent == nullptr) {
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// If we're currently processing a top-level file, record the include
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// directive. We don't need to record includes from included files.
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_angle_includes.insert(filename);
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@ -2470,17 +2480,19 @@ expand_manifest(const CPPManifest *manifest, const YYLTYPE &loc) {
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CPPManifest::Ignores ignores;
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ignores.insert(manifest);
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for (const InputFile &infile : _files) {
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if (infile._ignore_manifest) {
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ignores.insert(infile._manifest);
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InputFile *infile = _infile;
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while (infile != nullptr) {
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if (infile->_ignore_manifest) {
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ignores.insert(infile->_manifest);
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}
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infile = infile->_parent;
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}
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string expanded = " " + manifest->expand(args, false, ignores) + " ";
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push_expansion(expanded, manifest, loc);
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Expanding " << manifest->_name << " to " << expanded << "\n";
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#endif
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@ -3006,10 +3018,12 @@ scan_raw(int c) {
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*/
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bool CPPPreprocessor::
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should_ignore_manifest(const CPPManifest *manifest) const {
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for (const InputFile &infile : _files) {
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if (infile._ignore_manifest && infile._manifest == manifest) {
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InputFile *infile = _infile;
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while (infile != nullptr) {
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if (infile->_ignore_manifest && infile->_manifest == manifest) {
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return true;
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}
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infile = infile->_parent;
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}
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return false;
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@ -3021,10 +3035,12 @@ should_ignore_manifest(const CPPManifest *manifest) const {
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*/
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bool CPPPreprocessor::
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should_ignore_preprocessor() const {
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for (const InputFile &infile : _files) {
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if (infile._ignore_manifest) {
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InputFile *infile = _infile;
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while (infile != nullptr) {
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if (infile->_ignore_manifest) {
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return true;
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}
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infile = infile->_parent;
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}
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return false;
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@ -3041,18 +3057,21 @@ get() {
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return c;
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}
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if (_files.empty()) {
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if (UNLIKELY(_infile == nullptr)) {
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return EOF;
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}
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int c = _files.back().get();
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int c = _infile->get();
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while (c == EOF && !_files.empty()) {
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while (UNLIKELY(c == EOF && _infile != nullptr)) {
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "End of input stream, restoring to previous input\n";
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#endif
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_files.pop_back();
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// Pop the last file off the end.
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InputFile *infile = _infile;
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_infile = infile->_parent;
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delete infile;
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// Synthesize a newline, just in case the file doesn't already end with
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// one.
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@ -3077,21 +3096,21 @@ peek() {
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return _unget;
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}
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if (_files.empty()) {
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InputFile *infile = _infile;
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if (UNLIKELY(infile == nullptr)) {
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return EOF;
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}
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Files::reverse_iterator it = _files.rbegin();
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int c = (*it).peek();
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int c = infile->peek();
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while (c == EOF && it != _files.rend()) {
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int last_c = (*it)._prev_last_c;
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++it;
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while (UNLIKELY(c == EOF && infile != nullptr)) {
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int last_c = infile->_prev_last_c;
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infile = infile->_parent;
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if (last_c != '\0') {
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c = last_c;
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} else if (it != _files.rend()) {
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c = (*it).peek();
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} else if (infile != nullptr) {
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c = infile->peek();
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}
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}
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@ -3117,7 +3136,7 @@ unget(int c) {
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CPPTemplateParameterList *CPPPreprocessor::
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nested_parse_template_instantiation(CPPTemplateScope *scope) {
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Beginning nested parse\n";
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#endif
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assert(scope != nullptr);
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@ -3206,7 +3225,7 @@ nested_parse_template_instantiation(CPPTemplateScope *scope) {
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_parsing_template_params = old_parsing_params;
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Ending nested parse\n";
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#endif
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return actual_params;
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@ -3222,7 +3241,7 @@ nested_parse_template_instantiation(CPPTemplateScope *scope) {
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void CPPPreprocessor::
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skip_to_end_nested() {
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Skipping tokens:\n";
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#endif
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@ -3236,7 +3255,7 @@ skip_to_end_nested() {
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}
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Done skipping tokens.\n";
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#endif
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}
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@ -3249,7 +3268,7 @@ skip_to_end_nested() {
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void CPPPreprocessor::
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skip_to_angle_bracket() {
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Skipping tokens:\n";
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#endif
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@ -3266,7 +3285,21 @@ skip_to_angle_bracket() {
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}
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#ifdef CPP_VERBOSE_LEX
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indent(cerr, _files.size() * 2)
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indent(cerr, get_file_depth() * 2)
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<< "Done skipping tokens.\n";
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#endif
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}
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/**
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* Returns the number of files on the _infile list.
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*/
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int CPPPreprocessor::
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get_file_depth() const{
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int depth = 0;
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InputFile *infile = _infile;
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while (infile != nullptr) {
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++depth;
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infile = infile->_parent;
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}
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return depth;
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}
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|
||||
@ -182,6 +182,8 @@ private:
|
||||
void skip_to_end_nested();
|
||||
void skip_to_angle_bracket();
|
||||
|
||||
int get_file_depth() const;
|
||||
|
||||
class InputFile {
|
||||
public:
|
||||
InputFile();
|
||||
@ -203,12 +205,11 @@ private:
|
||||
bool _lock_position;
|
||||
bool _ignore_manifest;
|
||||
int _prev_last_c;
|
||||
|
||||
InputFile *_parent = nullptr;
|
||||
};
|
||||
|
||||
// This must be a list and not a vector because we don't have a good copy
|
||||
// constructor defined for InputFile.
|
||||
typedef std::list<InputFile> Files;
|
||||
Files _files;
|
||||
InputFile *_infile = nullptr;
|
||||
|
||||
enum State {
|
||||
S_normal, S_eof, S_nested, S_end_nested
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user