man uinsert () - Inserts a character in a string. Allegro game programming library.
NAME
uinsert - Inserts a character in a string. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int uinsert(char *s, int index, int c);
DESCRIPTION
Inserts the character `c' at the specified `index' in the string, sliding the rest of the data along to make room. If `index' is negative, it counts backward from the end of the string. Example:
uinsert(text_string, 0, prefix_letter);
RETURN VALUE
Returns the number of bytes by which the trailing part of the string was moved.