Method unindentLine

astyle/src/ASEnhancer.cpp:727–771

* unindent a line by a given number of tabsets * by erasing the leading whitespace from the line argument. * * @param line a reference to the line to unindent. * @param unindent the number of tabsets to erase. * @return the number of characters erased. */

 * @return              the number of characters erased.
 */
int ASEnhancer::unindentLine(string  &line, int unindent) const
{
	size_t whitespace = line.find_first_not_of(" \t");

	if (whitespace == string::npos)         // if line is blank
		whitespace = line.length();         // must remove padding, if any

	if (whitespace == 0)
		return 0;

	size_t charsToErase = 0;

	if (forceTab && indentLength != tabLength)
	{
		// replace tab indents with spaces
		convertForceTabIndentToSpaces(line);
		// remove the space indents
		size_t spaceIndentLength = line.find_first_not_of(" \t");
		charsToErase = unindent * indentLength;
		if (charsToErase <= spaceIndentLength)
			line.erase(0, charsToErase);
		else
			charsToErase = 0;
		// replace leading spaces with tab indents
		convertSpaceIndentToForceTab(line);
	}
	else if (useTabs)
	{
		charsToErase = unindent;
		if (charsToErase <= whitespace)
			line.erase(0, charsToErase);
		else
			charsToErase = 0;
	}
	else // spaces
	{
		charsToErase = unindent * indentLength;
		if (charsToErase <= whitespace)
			line.erase(0, charsToErase);
		else
			charsToErase = 0;
	}

	return charsToErase;
}


}   // end namespace astyle