#include <stdio.h>
#include <assert.h>
#include <sys/sbuf.h>

int main ()
{
	/* 
	 * Create a default sbuf. Fill all the SSO storage area, then add some
	 * more. 
	 */
	{
		struct sbuf *s = sbuf_new_auto();
		assert(s->s_buf == s->s_sso_buf && "sbuf_new_auto");

		/* The first SBUF_SSO_LEN-1 bytes get written into the SSO buffer */
		for (int i=0; i<SBUF_SSO_LEN-1; ++i) {
			sbuf_putc(s, 'A');
			assert(s->s_buf == s->s_sso_buf && "sbuf_putc #1");
			assert(!(s->s_flags & SBUF_DYNAMIC) && "!dynamic");
		}

		/* Another byte triggers the switch to dynamically allocated memory */
		sbuf_putc(s, 'B');
		assert(s->s_buf != s->s_sso_buf && "sbuf_putc #2");
		assert((s->s_flags & SBUF_DYNAMIC) && "dynamic");

		/* Finish up */
		assert (sbuf_finish(s) == 0 && "sbuf_finish #2");
		sbuf_delete(s);
	}

	/*
	 * Create another default sbuf. Fill only part of the SSO storage area.
	 */
	{
		struct sbuf *s = sbuf_new_auto();

		for (int i=0; i<SBUF_SSO_LEN/2; ++i) {
			sbuf_putc(s, 'C');
			assert(s->s_buf == s->s_sso_buf && "sbuf_putc #3");
			assert(!(s->s_flags & SBUF_DYNAMIC) && "!dynamic #2");
		}

		/* Finish up */
		assert (sbuf_finish(s) == 0 && "sbuf_finish #2");
		sbuf_delete(s);
	}

	return 0;
}