Inserting

are there any open/write functions for C , which do not overwrite chars in a file , but insert them ?

or do i have to write a shitty loop that just reads , stores and writes a char ?

also discuss file and string handling libraries because most that i have seen suck .

>>10
Many text editors use a buffer per line, with two buffers for the line on which the cursor is: one for the part before the cursor, one for the part after.