Format a string and place it in a buffer
int scnprintf(char * buf, size_t size, const char * fmt, ...);
buf
The buffer to place the result into
size
The size of the buffer, including the trailing null space
fmt
The format string to use @...: Arguments for the format string
...
variable arguments
The return value is the number of characters written into buf not including the trailing '\0'. If size is == 0 the function returns 0.