Function SortWithOptions

source/script2.cpp:6257–6294

int SortWithOptions(const void *a1, const void *a2)
// Decided to just have one sort function since there are so many permutations.  The performance
// will be a little bit worse, but it seems simpler to implement and maintain.
// This function's input parameters are pointers to the elements of the array.  Since those elements
// are themselves pointers, the input parameters are therefore pointers to pointers (handles).
{
	LPTSTR sort_item1 = *(LPTSTR *)a1;
	LPTSTR sort_item2 = *(LPTSTR *)a2;
	if (g_SortColumnOffset > 0)
	{
		// Adjust each string (even for numerical sort) to be the right column position,
		// or the position of its zero terminator if the column offset goes beyond its length:
		size_t length = _tcslen(sort_item1);
		sort_item1 += (size_t)g_SortColumnOffset > length ? length : g_SortColumnOffset;
		length = _tcslen(sort_item2);
		sort_item2 += (size_t)g_SortColumnOffset > length ? length : g_SortColumnOffset;
	}
	if (g_SortNumeric) // Takes precedence over g_SortCaseSensitive
	{
		// For now, assume both are numbers.  If one of them isn't, it will be sorted as a zero.
		// Thus, all non-numeric items should wind up in a sequential, unsorted group.
		// Resolve only once since parts of the ATOF() macro are inline:
		double item1_minus_2 = ATOF(sort_item1) - ATOF(sort_item2);
		if (!item1_minus_2) // Exactly equal.
			return (sort_item1 > sort_item2) ? 1 : -1; // Stable sort.
		// Otherwise, it's either greater or less than zero:
		int result = (item1_minus_2 > 0.0) ? 1 : -1;
		return g_SortReverse ? -result : result;
	}
	// Otherwise, it's a non-numeric sort.
	// v1.0.43.03: Added support the new locale-insensitive mode.
	int result = (g_SortCaseSensitive != SCS_INSENSITIVE_LOGICAL)
		? tcscmp2(sort_item1, sort_item2, g_SortCaseSensitive) // Resolve large macro only once for code size reduction.
		: StrCmpLogicalW(sort_item1, sort_item2);
	if (!result)
		result = (sort_item1 > sort_item2) ? 1 : -1; // Stable sort.
	return g_SortReverse ? -result : result;
}