Method FilePatternApply

source/script2.cpp:8551–8596

ResultType Line::FilePatternApply(LPTSTR aFilePattern, FileLoopModeType aOperateOnFolders
	, bool aDoRecurse, FilePatternCallback aCallback, void *aCallbackData)
{
	if (!*aFilePattern)
		// Caller should handle this case before calling us if an exception is to be thrown.
		return SetLastErrorMaybeThrow(true, ERROR_INVALID_PARAMETER);

	if (aOperateOnFolders == FILE_LOOP_INVALID) // In case runtime dereference of a var was an invalid value.
		aOperateOnFolders = FILE_LOOP_FILES_ONLY;  // Set default.
	g->LastError = 0; // Set default. Overridden only when a failure occurs.

	FilePatternStruct fps;

	LPTSTR last_backslash = _tcsrchr(aFilePattern, '\\');
	if (last_backslash)
		fps.dir_length = last_backslash - aFilePattern + 1; // Include the slash.
	else // Use current working directory, e.g. if user specified only *.*
		fps.dir_length = 0;
	fps.pattern_length = _tcslen(aFilePattern + fps.dir_length);
	
	// Testing shows that the ANSI version of FindFirstFile() will not accept a path+pattern longer
	// than 259, even if the pattern would match files whose names are short enough to be legal.
	if (fps.dir_length + fps.pattern_length >= _countof(fps.path)
		|| fps.pattern_length >= _countof(fps.pattern))
		return SetLastErrorMaybeThrow(true, ERROR_BUFFER_OVERFLOW);

	// Make copies in case of overwrite of deref buf during LONG_OPERATION/MsgSleep,
	// and to allow modification:
	_tcscpy(fps.path, aFilePattern); // Include the pattern initially.
	_tcscpy(fps.pattern, aFilePattern + fps.dir_length); // Just the naked filename or pattern, for use with aDoRecurse.

	if (!StrChrAny(fps.pattern, _T("?*")))
		// Since no wildcards, always operate on this single item even if it's a folder.
		aOperateOnFolders = FILE_LOOP_FILES_AND_FOLDERS;

	// Passing the parameters this way reduces code size:
	fps.aCallback = aCallback;
	fps.aCallbackData = aCallbackData;
	fps.aDoRecurse = aDoRecurse;
	fps.aOperateOnFolders = aOperateOnFolders;

	fps.failure_count = 0;

	FilePatternApply(fps);
	return ThrowIntIfNonzero(fps.failure_count); // i.e. indicate success if there were no failures.
}