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Code Issues 121 Wiki Activity

Revert "Reduce string creations and deletions"

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This commit is contained in:
Hirek
2026-05-04 01:24:11 +02:00
committed by GitHub
parent e7edf601c2
commit 3a42a8c158
2 changed files with 53 additions and 49 deletions
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92
utilities/parser.cpp
View File

@@ -190,17 +190,16 @@ bool cParser::getTokens(unsigned int Count, bool ToLower, const char *Break)
this->str("");
this->clear();
*/
std::string token;
for (unsigned int i = tokens.size(); i < Count; ++i)
{
readToken(token, ToLower, Break);
if (token.empty())
std::string token = readToken(ToLower, Break);
if (true == token.empty())
{
// no more tokens
break;
}
tokens.emplace_back(std::move(token));
// collect parameters
tokens.emplace_back(token);
/*
if (i == 0)
this->str(token);
@@ -219,6 +218,18 @@ bool cParser::getTokens(unsigned int Count, bool ToLower, const char *Break)
return true;
}
std::string cParser::readTokenFromDelegate(bool ToLower, const char *Break)
{
if (!mIncludeParser)
return {};
std::string token = mIncludeParser->readToken(ToLower, Break);
if (token.empty())
{
mIncludeParser = nullptr;
}
return token;
}
std::string cParser::readTokenFromStream(bool ToLower, const char *Break)
{
std::string token;
@@ -229,7 +240,9 @@ std::string cParser::readTokenFromStream(bool ToLower, const char *Break)
while (token.empty() && mStream->peek() != EOF) {
while (mStream->get(c)) {
while (mStream->peek() != EOF) {
c = static_cast<char>(mStream->get());
if (c == '\n') {
++mLine;
}
@@ -267,7 +280,7 @@ void cParser::stripFirstTokenBOM(std::string& token, bool ToLower, const char* B
// if first "token" was standalone BOM, read the next real token (avoid recursion)
while (token.empty() && mStream->peek() != EOF) {
readToken(token, ToLower, Break);
token = readToken(ToLower, Break);
// readToken will not re-enter BOM stripping because mFirstToken is now false
break;
}
@@ -309,7 +322,7 @@ void cParser::skipIncludeBlock() {
// mimic original: while token != "end" readToken(true)
std::string t;
do {
readToken(t, true);
t = readToken(true);
} while (t != "end" && !t.empty());
}
@@ -354,81 +367,72 @@ void cParser::startIncludeFromParser(cParser& srcParser, bool ToLower, std::stri
bool cParser::handleIncludeIfPresent(std::string& token, bool ToLower, const char* Break) {
// token-mode include: token == "include"
if (expandIncludes && token == "include") {
std::string includefile;
if (allowRandomIncludes)
includefile = deserialize_random_set(*this);
else
readToken(includefile, ToLower);
std::string includefile =
allowRandomIncludes ? deserialize_random_set(*this) : readToken(ToLower);
startIncludeFromParser(*this, ToLower, std::move(includefile));
// after processing include, return next token from current parser
readToken(token, ToLower, Break);
token = readToken(ToLower, Break);
return true;
}
// line-mode HACK: Break == "\n\r" and line begins with "include"
if ((std::strcmp(Break, "\n\r") == 0) && token.compare(0, 7, "include") == 0) {
cParser includeparser(token.substr(7));
std::string includefile;
if (allowRandomIncludes)
includefile = deserialize_random_set(includeparser);
else
includeparser.readToken(includefile, ToLower);
std::string includefile =
allowRandomIncludes ? deserialize_random_set(includeparser) : includeparser.readToken(ToLower);
startIncludeFromParser(includeparser, ToLower, std::move(includefile));
readToken(token, ToLower, Break);
token = readToken(ToLower, Break);
return true;
}
return false;
}
void cParser::readToken(std::string &out, bool ToLower, const char *Break)
std::string cParser::readToken(bool ToLower, const char *Break)
{
if (mIncludeParser)
std::string token;
token = readTokenFromDelegate(ToLower, Break);
if (token.empty())
{
mIncludeParser->readToken(out, ToLower, Break);
if (out.empty())
{
mIncludeParser = nullptr;
out = readTokenFromStream(ToLower, Break);
}
}
else
{
out = readTokenFromStream(ToLower, Break);
token = readTokenFromStream(ToLower, Break);
}
stripFirstTokenBOM(out, ToLower, Break);
stripFirstTokenBOM(token, ToLower, Break);
substituteParameters(out, ToLower);
substituteParameters(token, ToLower);
handleIncludeIfPresent(out, ToLower, Break);
handleIncludeIfPresent(token, ToLower, Break);
return token;
}
std::vector<std::string> cParser::readParameters(cParser &Input)
{
std::vector<std::string> includeparameters;
std::string parameter;
Input.readToken(parameter, false); // w parametrach nie zmniejszamy
std::string parameter = Input.readToken(false); // w parametrach nie zmniejszamy
while ((parameter.empty() == false) && (parameter != "end"))
{
includeparameters.emplace_back(parameter);
Input.readToken(parameter, false);
parameter = Input.readToken(false);
}
return includeparameters;
}
std::string cParser::readQuotes(char const Quote)
{ // read the stream until specified char or stream end
std::string token;
std::string token = "";
char c{0};
bool escaped = false;
while (mStream->get(c))
while (mStream->peek() != EOF)
{ // get all chars until the quote mark
c = mStream->get();
if (escaped)
{
escaped = false;
@@ -454,11 +458,13 @@ std::string cParser::readQuotes(char const Quote)
void cParser::skipComment(std::string const &Endmark)
{ // pobieranie znaków aż do znalezienia znacznika końca
std::string input;
std::string input = "";
char c{0};
auto const endmarksize = Endmark.size();
while (mStream->get(c))
while (mStream->peek() != EOF)
{
// o ile nie koniec pliku
c = mStream->get(); // pobranie znaku
if (c == '\n')
{
// update line counter
@@ -549,8 +555,8 @@ std::size_t cParser::count()
size_t count{0};
do
{
token.clear();
readToken(token, false);
token = "";
token = readToken(false);
++count;
} while (false == token.empty());

10
utilities/parser.h
View File

@@ -45,14 +45,11 @@ class cParser //: public std::stringstream
inline
void
ignoreToken() {
std::string out;
readToken(out); };
readToken(); };
inline
bool
expectToken( std::string const &Value ) {
std::string out;
readToken(out);
return out == Value; };
return readToken() == Value; };
inline
bool
eof() {
@@ -69,6 +66,7 @@ class cParser //: public std::stringstream
return m_autoclear; }
bool
getTokens( unsigned int Count = 1, bool ToLower = true, char const *Break = "\n\r\t ;" );
std::string readTokenFromDelegate(bool ToLower, const char *Break);
std::string readTokenFromStream(bool ToLower, const char *Break);
void stripFirstTokenBOM(std::string &token, bool ToLower, const char *Break);
void substituteParameters(std::string &token, bool ToLower);
@@ -105,7 +103,7 @@ class cParser //: public std::stringstream
void startIncludeFromParser(cParser &srcParser, bool ToLower, std::string includefile);
bool handleIncludeIfPresent(std::string &token, bool ToLower, const char *Break);
// methods:
void readToken(std::string& out, bool ToLower = true, const char *Break = "\n\r\t ;");
std::string readToken(bool ToLower = true, const char *Break = "\n\r\t ;");
static std::vector<std::string> readParameters( cParser &Input );
std::string readQuotes( char const Quote = '\"' );
void skipComment( std::string const &Endmark );