Writing strings

To output printable strings, we have the simple fputc, fputs and fputrune equivalents:

$\begin{lstlisting} /* fz_putc: fputc equivalent for output streams. */ ...$

We also provide a family of enhanced output functions, patterned after fprintf:

$\begin{lstlisting} /* fz_vsnprintf: Our customised vsnprintf routine. Takes %c... ...(fz_context *ctx, fz_output *out, const char *fmt, va_list ap); \end{lstlisting}$