uszprintf man page
uszprintf — Writes formatted data into a buffer, specifying size. Allegro game programming library.
int uszprintf(char *buf, int size, const char *format, ...);
This function writes formatted data into the output buffer, whose length in bytes is specified by `size' and which is guaranteed to be NULL terminated. Example:
char buffer; int player_score; ... uszprintf(buffer, sizeof(buffer), "Your score is: %d", player_score);
Returns the number of characters that would have been written without eventual truncation (like with usprintf), not including the terminating null character.
uconvert(3), usprintf(3), uvszprintf(3), exgui(3)
exgui(3), textprintf_ex(3), usprintf(3), uvszprintf(3).