C++ Tokenizer::advIf方法代码示例

// -----------------------------------------------------------------------------
// Reads and parses the SLADE configuration file
// -----------------------------------------------------------------------------
void readConfigFile()
{
	// Open SLADE.cfg
	Tokenizer tz;
	if (!tz.openFile(App::path("slade3.cfg", App::Dir::User)))
		return;

	// Go through the file with the tokenizer
	while (!tz.atEnd())
	{
		// If we come across a 'cvars' token, read in the cvars section
		if (tz.advIf("cvars", 2))
		{
			// Keep reading name/value pairs until we hit the ending '}'
			while (!tz.checkOrEnd("}"))
			{
				CVar::set(tz.current().text, tz.peek().text);
				tz.adv(2);
			}

			tz.adv(); // Skip ending }
		}

		// Read base resource archive paths
		if (tz.advIf("base_resource_paths", 2))
		{
			while (!tz.checkOrEnd("}"))
			{
				archive_manager.addBaseResourcePath(tz.current().text);
				tz.adv();
			}

			tz.adv(); // Skip ending }
		}

		// Read recent files list
		if (tz.advIf("recent_files", 2))
		{
			while (!tz.checkOrEnd("}"))
			{
				archive_manager.addRecentFile(tz.current().text);
				tz.adv();
			}

			tz.adv(); // Skip ending }
		}

		// Read keybinds
		if (tz.advIf("keys", 2))
			KeyBind::readBinds(tz);

		// Read nodebuilder paths
		if (tz.advIf("nodebuilder_paths", 2))
		{
			while (!tz.checkOrEnd("}"))
			{
				NodeBuilders::addBuilderPath(tz.current().text, tz.peek().text);
				tz.adv(2);
			}

			tz.adv(); // Skip ending }
		}

		// Read game exe paths
		if (tz.advIf("executable_paths", 2))
		{
			while (!tz.checkOrEnd("}"))
			{
				Executables::setGameExePath(tz.current().text, tz.peek().text);
				tz.adv(2);
			}

			tz.adv(); // Skip ending }
		}

		// Read window size/position info
		if (tz.advIf("window_info", 2))
			Misc::readWindowInfo(tz);

		// Next token
		tz.adv();
	}
}

// -----------------------------------------------------------------------------
// Parses ZMAPINFO-format definitions in [entry]
// -----------------------------------------------------------------------------
bool MapInfo::parseZMapInfo(ArchiveEntry* entry)
{
	Tokenizer tz;
	tz.setReadLowerCase(true);
	tz.openMem(entry->data(), entry->name());

	while (!tz.atEnd())
	{
		// Include
		if (tz.check("include"))
		{
			// Get entry at include path
			auto include_entry = entry->parent()->entryAtPath(tz.next().text);

			if (!include_entry)
			{
				Log::warning(
					"Warning - Parsing ZMapInfo \"{}\": Unable to include \"{}\" at line {}",
					entry->name(),
					tz.current().text,
					tz.lineNo());
			}
			else if (!parseZMapInfo(include_entry))
				return false;
		}

		// Map
		else if (tz.check("map") || tz.check("defaultmap") || tz.check("adddefaultmap"))
		{
			if (!parseZMap(tz, tz.current().text))
				return false;
		}

		// DoomEdNums
		else if (tz.check("doomednums"))
		{
			if (!parseDoomEdNums(tz))
				return false;
		}

		// Unknown block (skip it)
		else if (tz.check("{"))
		{
			Log::warning(2, "Warning - Parsing ZMapInfo \"{}\": Skipping {{}} block", entry->name());

			tz.adv();
			tz.skipSection("{", "}");
			continue;
		}

		// Unknown
		else
		{
			Log::warning(2, R"(Warning - Parsing ZMapInfo "{}": Unknown token "{}")", entry->name(), tz.current().text);
		}

		tz.adv();
	}

	Log::info(2, "Parsed ZMapInfo entry {} successfully", entry->name());

	return true;
}

// -----------------------------------------------------------------------------
// Parses a ZMAPINFO map definition of [type] beginning at the current token in
// tokenizer [tz]
// -----------------------------------------------------------------------------
bool MapInfo::parseZMap(Tokenizer& tz, std::string_view type)
{
	// TODO: Handle adddefaultmap
	auto map = default_map_;

	// Normal map, get lump/name/etc
	tz.adv();
	if (type == "map")
	{
		// Entry name should be just after map keyword
		map.entry_name = tz.current().text;

		// Parse map name
		tz.adv();
		if (tz.check("lookup"))
		{
			map.lookup_name = true;
			map.name        = tz.next().text;
		}
		else
		{
			map.lookup_name = false;
			map.name        = tz.current().text;
		}

		tz.adv();
	}

	if (!tz.advIf("{"))
//.........这里部分代码省略.........

// -----------------------------------------------------------------------------
// Parses a ZScript 'statement'. This isn't technically correct but suits our
// purposes well enough
//
// tokens
// {
//     block[0].tokens
//     {
//         block[0].block[0].tokens;
//         ...
//     }
//
//     block[1].tokens;
//     ...
// }
// -----------------------------------------------------------------------------
bool ParsedStatement::parse(Tokenizer& tz)
{
	// Check for unexpected token
	if (tz.check('}'))
	{
		tz.adv();
		return false;
	}

	line = tz.lineNo();

	// Tokens
	bool in_initializer = false;
	while (true)
	{
		// End of statement (;)
		if (tz.advIf(';'))
			return true;

		// DB comment
		if (tz.current().text.StartsWith(db_comment))
		{
			tokens.push_back(tz.current().text);
			tokens.push_back(tz.getLine());
			return true;
		}

		if (tz.check('}'))
		{
			// End of array initializer
			if (in_initializer)
			{
				in_initializer = false;
				tokens.emplace_back("}");
				tz.adv();
				continue;
			}

			// End of statement
			return true;
		}

		if (tz.atEnd())
		{
			Log::debug(S_FMT("Failed parsing zscript statement/block beginning line %u", line));
			return false;
		}

		// Beginning of block
		if (tz.advIf('{'))
			break;

		// Array initializer: ... = { ... }
		if (tz.current().text.Cmp("=") == 0 && tz.peek() == '{')
		{
			tokens.emplace_back("=");
			tokens.emplace_back("{");
			tz.adv(2);
			in_initializer = true;
			continue;
		}

		tokens.push_back(tz.current().text);
		tz.adv();
	}

	// Block
	while (true)
	{
		if (tz.advIf('}'))
			return true;

		if (tz.atEnd())
		{
			Log::debug(S_FMT("Failed parsing zscript statement/block beginning line %u", line));
			return false;
		}

		block.push_back({});
		block.back().entry = entry;
		if (!block.back().parse(tz) || block.back().tokens.empty())
			block.pop_back();
	}
}