LhaParser.h File Reference

Parser for LHA / FLHA-style files into LhaBlock structures and DBNode trees. More...

#include <string>
#include <map>
#include <memory>
#include <filesystem>
#include <climits>
#include <regex>
#include <fstream>
#include <sstream>
#include <vector>
#include <algorithm>
#include <unordered_set>
#include <iomanip>
#include "Include.h"
#include "LhaBlockPrototype.h"
#include "IParser.h"
#include "lha_blocks.h"
#include "lha_elements.h"
#include "Logger.h"
#include "DBNode.h"

Include dependency graph for LhaParser.h:

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Go to the source code of this file.

Classes
struct	Token
	Single lexical token produced from an LHA file. More...
class	LhaParser
	Parser for LHA/FLHA files, producing blocks and a DBNode representation. More...

Enumerations
enum class	TokenType {   FLOAT , INTEGER , BLOCK , DECAY ,   NEWLINE , SKIP , COMMENT , WORD ,   OTHER }
	Token categories used during LHA lexical analysis. More...

Functions
const std::regex	analyzer_rx (R"x(((?:[+-])?(?:\d+\.\d*|\.\d+)(?:[eEdD][+-]\d+)?|(\d+(?:[eEdD][+-]\d+)?))|(?:[+-]?\d+(?!\.))|(block)|(decay)|(\n)|([ \t]+)|(#.*)|([\w\=\.]+)|([^#]*))x", std::regex_constants::icase)

Detailed Description

Parser for LHA / FLHA-style files into LhaBlock structures and DBNode trees.

LhaParser decodes a textual LHA (or FLHA) file into:

• a set of LhaBlock objects (one per block),
• then a DBNode tree suitable for use by the rest of the framework.

It uses:

• a regex-based tokenizer,
• a simple state machine to group tokens by block,
• a set of Prototype descriptors to interpret each block's layout.

Definition in file LhaParser.h.

Enumeration Type Documentation

TokenType

enum class TokenType

strong

Token categories used during LHA lexical analysis.

The order of the enum values is tightly coupled to the capturing groups of the regular expression analyzer_rx. Changing one requires updating the other accordingly.

Enumerator
FLOAT	Floating point number.
INTEGER	Integer number.
BLOCK	Block keyword.
DECAY	Decay keyword.
NEWLINE	Newline character.
SKIP	Whitespace character.
COMMENT	Comment line.
WORD	Word token.
OTHER	Other types of tokens.

Definition at line 47 of file LhaParser.h.

Function Documentation

analyzer_rx()

const std::regex analyzer_rx	(	R"x(((?:[+-])?(?:\d+\.\d*|\.\d+)(?:[eEdD][+-]\d+)?|(\d+(?:[eEdD][+-]\d+)?))|(?:[+-]?\d+(?!\.))|(block)|(decay)|(\n)|([ \t]+)|(#.*)|([\w\=\.]+)|([^#]*))x"	,
		std::regex_constants::icase
	)