added qse_awk_pushecb()/qse_awk_popecb()/qse_sed_pushecb()/qse_sed_popecb()/qse_httpd_pushecb()/qse_httpd_popecb().

started reorganizing samples/httpd01 to net/httpd-std.c

qse/lib/sed/sed.c

@@ -75,6 +75,11 @@ qse_sed_t* qse_sed_open (qse_mmgr_t* mmgr, qse_size_t xtnsize)
 
 void qse_sed_close (qse_sed_t* sed)
 {
+	qse_sed_ecb_t* ecb;
+
+	for (ecb = sed->ecb; ecb; ecb = ecb->next)
+		if (ecb->close) ecb->close (sed);
+
 	qse_sed_fini (sed);
 	QSE_MMGR_FREE (sed->mmgr, sed);
 }
@@ -4142,6 +4147,19 @@ void qse_sed_setlinenum (qse_sed_t* sed, qse_size_t num)
 	sed->e.in.num = num;
 }
 
+qse_sed_ecb_t* qse_sed_popecb (qse_sed_t* sed)
+{
+	qse_sed_ecb_t* top = sed->ecb;
+	if (top) sed->ecb = top->next;
+	return top;
+}
+
+void qse_sed_pushecb (qse_sed_t* sed, qse_sed_ecb_t* ecb)
+{
+	ecb->next = sed->ecb;
+	sed->ecb = ecb;
+}
+
 #ifdef QSE_ENABLE_SEDTRACER
 qse_sed_exec_tracer_t qse_sed_getexectracer (qse_sed_t* sed)
 {

qse/lib/sed/sed.h

@@ -99,6 +99,8 @@ struct qse_sed_t
 		} rex;
 	} depth;
 
+	qse_sed_ecb_t* ecb;
+
 	/** source text pointers */
 	struct
 	{