Method ParseMenuLine

src/Display/Menu.cpp:232–448

Parse a line in a menu layout file returning any error message, or nullptr if there was no error. Leading whitespace has already been skipped.

// Parse a line in a menu layout file returning any error message, or nullptr if there was no error.
// Leading whitespace has already been skipped.
const char *_ecv_array _ecv_null Menu::ParseMenuLine(char *_ecv_array const commandWord) noexcept
{
	errorColumn = 0;

	// Check for blank or comment line
	if (*commandWord == ';' || *commandWord == 0)
	{
		return nullptr;
	}

	// Find the first word
	char *_ecv_array args = commandWord;
	while (isalpha(*args))
	{
		++args;
	}
	if (args == commandWord || (*args != ' ' && *args != '\t' && *args != 0))
	{
		errorColumn = (args - commandWord) + 1;
		return "Bad command";
	}

	if (*args != 0)
	{
		*args = 0;		// null terminate the command word
		++args;
	}

	// Parse the arguments
	const char *_ecv_array _ecv_null strVis = nullptr;
	MenuItem::Visibility xVis = MenuItem::AlwaysVisible;
	unsigned int decimals = 0;
	unsigned int nparam = 0;
	const char *_ecv_array _ecv_null strNparam = nullptr;
	unsigned int width = 0;
	unsigned int alignment = 0;
	const char *_ecv_array text = "*";
	const char *_ecv_array fname = "main";
	const char *_ecv_array dirpath = "";
	const char *_ecv_array _ecv_null action = nullptr;

	while (*args != 0 && *args != ';')
	{
		char ch;
		switch (ch = (char)toupper(*args++))
		{
		case ' ':
		case '\t':
			break;

		case 'R':
			row = StrToU32(args, &args) + rowOffset;
			break;

		case 'C':
			column = StrToU32(args, &args) + currentMargin;
			break;