memory_file_line_position/4

Availability::- use_module(library(memfile)).(can be autoloaded)

memory_file_line_position(+MF, ?Line, ?LinePos, ?Offset)

True if the character offset Offset corresponds with the LinePos character on line Line. Lines are counted from one (1). Note that LinePos is not the column as each character counts for one, including backspace and tab.