mirror of
https://github.com/MaSzyna-EU07/maszyna.git
synced 2026-10-17 22:39:19 +02:00
278 lines
11 KiB
C++
278 lines
11 KiB
C++
/*
|
|
This Source Code Form is subject to the
|
|
terms of the Mozilla Public License, v.
|
|
2.0. If a copy of the MPL was not
|
|
distributed with this file, You can
|
|
obtain one at
|
|
http://mozilla.org/MPL/2.0/.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <string>
|
|
#include <string_view>
|
|
#include <sstream>
|
|
#include <fstream>
|
|
#include <vector>
|
|
#include <map>
|
|
#include <array>
|
|
#include <charconv>
|
|
#include <type_traits>
|
|
|
|
namespace scene
|
|
{
|
|
struct include_site;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// cParser -- generic class for parsing text data, either from file or provided string
|
|
|
|
class cParser //: public std::stringstream
|
|
{
|
|
public:
|
|
// parameters:
|
|
enum buffertype
|
|
{
|
|
buffer_FILE,
|
|
buffer_TEXT
|
|
};
|
|
// constructors:
|
|
cParser(std::string const &Stream, buffertype const Type = buffer_TEXT, std::string Path = "", bool const Loadtraction = true, std::vector<std::string> Parameters = std::vector<std::string>(), bool allowRandom = false );
|
|
// destructor:
|
|
virtual ~cParser();
|
|
// methods:
|
|
template <typename Type_>
|
|
cParser &
|
|
operator>>( Type_ &Right );
|
|
template <typename Output_>
|
|
Output_
|
|
getToken( bool const ToLower = true, char const *Break = "\n\r\t ;" ) {
|
|
getTokens( 1, ToLower, Break );
|
|
Output_ output{};
|
|
*this >> output;
|
|
return output; };
|
|
inline
|
|
void
|
|
ignoreToken() {
|
|
std::string out;
|
|
readToken(out); };
|
|
inline
|
|
bool
|
|
expectToken( std::string const &Value ) {
|
|
std::string out;
|
|
readToken(out);
|
|
return out == Value; };
|
|
inline
|
|
bool
|
|
eof() {
|
|
return mEofBit; };
|
|
inline
|
|
bool
|
|
ok() {
|
|
return !mFailBit; };
|
|
cParser &
|
|
autoclear( bool const Autoclear );
|
|
inline
|
|
bool
|
|
autoclear() const {
|
|
return m_autoclear; }
|
|
bool
|
|
getTokens( unsigned int Count = 1, bool ToLower = true, char const *Break = "\n\r\t ;" );
|
|
void readTokenFromStream(std::string &token, bool ToLower, const char *Break);
|
|
void stripFirstTokenBOM(std::string &token, bool ToLower, const char *Break);
|
|
void substituteParameters(std::string &token, bool ToLower);
|
|
void skipIncludeBlock();
|
|
// returns next incoming token, if any, without removing it from the set
|
|
inline
|
|
std::string
|
|
peek() const {
|
|
return false == tokens.empty() ? tokens.front() : ""; }
|
|
// inject string as internal include
|
|
void injectString(const std::string &str);
|
|
|
|
// returns percentage of file processed so far
|
|
int getProgress() const;
|
|
int getFullProgress() const;
|
|
//
|
|
static std::size_t countTokens( std::string const &Stream, std::string Path = "" );
|
|
// add custom definition of text which should be ignored when retrieving tokens
|
|
void addCommentStyle( std::string const &Commentstart, std::string const &Commentend );
|
|
// returns name of currently open file, or empty string for text type stream
|
|
std::string Name() const;
|
|
// returns number of currently processed line
|
|
std::size_t Line() const;
|
|
// returns number of currently processed line in main file, -1 if inside include
|
|
int LineMain() const;
|
|
// location of the most recently read token in its source file, as byte offsets
|
|
std::streamoff TokenBegin() const;
|
|
std::streamoff TokenEnd() const;
|
|
// true if the most recently read token came straight from a scenery file which isn't an *.inc node template
|
|
bool InLayerFile() const;
|
|
// text which follows the most recently read token, for the readers which take entries of a known kind straight from
|
|
// the text instead of token by token. empty if the tokens can't be taken that way: some wait to be picked up, there
|
|
// are parameters of an include to put in them, or comment marks other than the standard ones are in use
|
|
std::string_view remainingText() const;
|
|
// moves past specified amount of the text returned by remainingText(): Lines is the number of line breaks in it,
|
|
// Tokenlength the length of the token it ends with
|
|
void skipText(std::size_t Count, std::size_t Lines, std::size_t Tokenlength);
|
|
// converts text holding a plain number without involving a stream. returns: true on success, false if the text needs regular treatment
|
|
template <typename Type_>
|
|
static bool parseNumber( std::string_view Token, Type_ &Output );
|
|
bool expandIncludes = true;
|
|
bool allowRandomIncludes = false;
|
|
bool skipComments = true;
|
|
bool sceneryLayers = false; // included scenery files are registered as scenery layers (scenery opened for editing)
|
|
|
|
private:
|
|
// types:
|
|
// retrieved tokens waiting for pick up. a vector with moving head instead of a deque,
|
|
// as the latter can allocate memory for each stored item
|
|
struct token_queue {
|
|
std::vector<std::string> items;
|
|
std::size_t head { 0 };
|
|
|
|
bool empty() const {
|
|
return head == items.size(); }
|
|
std::size_t size() const {
|
|
return items.size() - head; }
|
|
std::string & front() {
|
|
return items[ head ]; }
|
|
std::string const & front() const {
|
|
return items[ head ]; }
|
|
void emplace_back( std::string &&Token ) {
|
|
items.emplace_back( std::move( Token ) ); }
|
|
void pop_front() {
|
|
++head;
|
|
if( head == items.size() ) {
|
|
clear(); }
|
|
else if( head >= 64 && head * 2 >= items.size() ) {
|
|
// keep the queue from growing without end if it never gets fully emptied
|
|
items.erase( items.begin(), items.begin() + static_cast<std::ptrdiff_t>( head ) );
|
|
head = 0; } }
|
|
void clear() {
|
|
items.clear();
|
|
head = 0; }
|
|
};
|
|
void startIncludeFromParser(cParser &srcParser, bool ToLower, std::string includefile);
|
|
scene::include_site include_site() const;
|
|
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 ;");
|
|
static std::vector<std::string> readParameters( cParser &Input );
|
|
std::string readQuotes( char const Quote = '\"' );
|
|
void skipComment( std::string const &Endmark );
|
|
bool findQuotes( std::string &String );
|
|
bool trimComments( std::string &String );
|
|
std::size_t count();
|
|
// input access. these mimic peek() and get() of the stream the parser used to read from,
|
|
// including their effect on the state reported by eof() and ok()
|
|
bool hasChar();
|
|
bool getChar( char &Char );
|
|
void updateCharClasses( char const *Break );
|
|
// members:
|
|
bool m_autoclear { true }; // unretrieved tokens are discarded when another read command is issued (legacy behaviour)
|
|
bool LoadTraction { true }; // load traction?
|
|
std::string mBuffer; // content of the open file or the provided text, loaded on creation.
|
|
bool mEofBit { false }; // input state, maintained the way a stream would do it
|
|
bool mFailBit { false };
|
|
enum charclass : unsigned char {
|
|
char_break = 1, // separates tokens
|
|
char_special = 2 }; // can't be simply added to the token: line end, quote, or potential end of a comment mark
|
|
std::array<unsigned char, 256> mCharClasses {}; // lookup built for the most recently used set of token separators
|
|
std::string mCharClassesBreak; // set of separators the lookup was built for
|
|
bool mCharClassesValid { false };
|
|
std::string mFile; // name of the open file, if any
|
|
std::string mPath; // path to open stream, for relative path lookups.
|
|
std::streamoff mSize { 0 }; // size of open stream, for progress report.
|
|
std::size_t mLine { 0 }; // currently processed line
|
|
bool mIncFile { false }; // the parser is processing an *.inc file
|
|
bool mLayerFile { false }; // the parser is processing a file registered as scenery layer
|
|
bool mInstanceFile { false }; // the parser is processing a template whose include is registered with the scenery layers
|
|
std::streamoff mPosition { 0 }; // amount of bytes read from the stream so far
|
|
std::streamoff mTokenBegin { 0 }; // location of the most recently read token
|
|
std::streamoff mTokenEnd { 0 };
|
|
std::streamoff mIncludeBegin { -1 }; // location of the include directive being processed, -1 if unknown
|
|
bool mFirstToken { true }; // processing first token in the current file; helper used when checking for utf bom
|
|
typedef std::map<std::string, std::string> commentmap;
|
|
commentmap mComments {
|
|
commentmap::value_type( "/*", "*/" ),
|
|
commentmap::value_type( "//", "\n" ) };
|
|
std::shared_ptr<cParser> mIncludeParser; // child class to handle include directives.
|
|
std::vector<std::string> parameters; // parameter list for included file.
|
|
token_queue tokens;
|
|
};
|
|
|
|
|
|
template <>
|
|
glm::vec3
|
|
cParser::getToken( bool const ToLower, const char *Break );
|
|
|
|
|
|
template<typename Type_>
|
|
bool
|
|
cParser::parseNumber( std::string_view const Token, Type_ &Output ) {
|
|
|
|
using type = std::remove_cv_t<Type_>;
|
|
if constexpr(
|
|
#ifdef __cpp_lib_to_chars
|
|
std::is_floating_point_v<type> ||
|
|
#endif
|
|
( std::is_integral_v<type>
|
|
&& false == std::is_same_v<type, bool>
|
|
&& false == std::is_same_v<type, char>
|
|
&& false == std::is_same_v<type, signed char>
|
|
&& false == std::is_same_v<type, unsigned char>
|
|
&& false == std::is_same_v<type, wchar_t>
|
|
&& false == std::is_same_v<type, char8_t>
|
|
&& false == std::is_same_v<type, char16_t>
|
|
&& false == std::is_same_v<type, char32_t> ) ) {
|
|
|
|
auto const *first { Token.data() };
|
|
auto const *last { first + Token.size() };
|
|
// only text which is a number from start to end is converted here. anything else, including forms
|
|
// the stream extraction doesn't recognize (inf, nan), is left for the stream to make sense of
|
|
auto const *digits { ( first != last && *first == '-' ) ? first + 1 : first };
|
|
if( digits == last ) { return false; }
|
|
if( ( *digits < '0' || *digits > '9' ) && *digits != '.' ) { return false; }
|
|
type value {};
|
|
auto const result { std::from_chars( first, last, value ) };
|
|
if( result.ec != std::errc() || result.ptr != last ) { return false; }
|
|
Output = value;
|
|
return true;
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
template<typename Type_>
|
|
cParser&
|
|
cParser::operator>>( Type_ &Right ) {
|
|
|
|
if( true == this->tokens.empty() ) { return *this; }
|
|
|
|
if( false == parseNumber( this->tokens.front(), Right ) ) {
|
|
std::stringstream converter( this->tokens.front() );
|
|
converter >> Right;
|
|
}
|
|
this->tokens.pop_front();
|
|
|
|
return *this;
|
|
}
|
|
|
|
template<>
|
|
cParser&
|
|
cParser::operator>>( std::string &Right );
|
|
|
|
template<>
|
|
cParser&
|
|
cParser::operator>>( bool &Right );
|
|
|
|
template<>
|
|
bool
|
|
cParser::getToken<bool>( bool const ToLower, const char *Break );
|
|
|
|
template<>
|
|
std::string
|
|
cParser::getToken<std::string>( bool const ToLower, const char *Break );
|