===================================================================
RCS file: /home/cvs/OpenXM_contrib2/asir2000/plot/plotf.c,v
retrieving revision 1.10
retrieving revision 1.18
diff -u -p -r1.10 -r1.18
--- OpenXM_contrib2/asir2000/plot/plotf.c	2001/08/22 09:19:21	1.10
+++ OpenXM_contrib2/asir2000/plot/plotf.c	2005/12/21 23:18:16	1.18
@@ -45,7 +45,7 @@
  * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
  * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
  *
- * $OpenXM: OpenXM_contrib2/asir2000/plot/plotf.c,v 1.9 2001/06/04 02:49:49 noro Exp $ 
+ * $OpenXM: OpenXM_contrib2/asir2000/plot/plotf.c,v 1.17 2005/05/18 03:27:00 noro Exp $ 
 */
 #include "ca.h"
 #include "parse.h"
@@ -53,34 +53,37 @@
 #include "ifplot.h"
 
 void Pifplot(), Pconplot(), Pplotover(), Pplot(), Parrayplot(), Pdrawcircle();
-void Pmemory_ifplot();
-void Popen_canvas(), Pclear_canvas(), Pdraw_obj();
+void Ppolarplot();
+void Pmemory_ifplot(),Pmemory_conplot(),Pmemory_plot();
+void Popen_canvas(), Pclear_canvas(), Pdraw_obj(), Pdraw_string();
+void Pox_rpc();
+void Pox_cmo_rpc();
 
 struct ftab plot_tab[] = {
 	{"ifplot",Pifplot,-7},
-	{"memory_ifplot",Pmemory_ifplot,-7},
+	{"memory_ifplot",Pmemory_ifplot,-6},
 	{"conplot",Pconplot,-8},
+	{"memory_conplot",Pmemory_conplot,-7},
 	{"plot",Pplot,-6},
-	{"plotover",Pplotover,3},
+	{"memory_plot",Pmemory_plot,-5},
+	{"polarplot",Ppolarplot,-6},
+	{"plotover",Pplotover,-4},
 	{"drawcircle",Pdrawcircle,5},
 	{"open_canvas",Popen_canvas,-3},
 	{"clear_canvas",Pclear_canvas,2},
 	{"draw_obj",Pdraw_obj,-4},
+	{"draw_string",Pdraw_string,-5},
 /*
 	{"arrayplot",Parrayplot,2},
 */
 	{0,0,0},
 };
 
-int current_s;
-
-void Popen_canvas(arg,rp)
-NODE arg;
-Obj *rp;
+void Popen_canvas(NODE arg,Q *rp)
 {
 	Q w300,s_id;
 	LIST geom;
-	int stream,id,i;
+	int stream;
 	NODE n,n0;
 	STRING fname,wname;
 
@@ -106,10 +109,7 @@ Obj *rp;
 	   	wname=name (STRING)]
 	*/
 
-	if ( stream < 0 )
-		stream = current_s;
-	else
-		current_s = stream;
+	stream = validate_ox_plot_stream(stream);
 	STOQ(stream,s_id);
 	if ( !geom ) {
 		STOQ(300,w300);
@@ -118,26 +118,39 @@ Obj *rp;
 	MKSTR(fname,"open_canvas");
 	arg = mknode(4,s_id,fname,geom,wname);
 	Pox_cmo_rpc(arg,rp);
+	*rp = s_id;
 }
 
-void Pifplot(arg,rp)
-NODE arg;
-Obj *rp;
+void ifplot_main(NODE arg,int is_memory, Obj *rp);
+
+void Pifplot(NODE arg,Obj *rp)
 {
+	ifplot_main(arg,0,rp);
+}
+
+void Pmemory_ifplot(NODE arg,Obj *rp)
+{
+	ifplot_main(arg,1,rp);
+}
+
+void ifplot_main(NODE arg,int is_memory, Obj *rp)
+{
 	Q m2,p2,w300,s_id;
 	NODE defrange;
 	LIST xrange,yrange,range[2],list,geom;
 	VL vl,vl0;
 	V v[2],av[2];
-	int stream,ri,id,i;
+	int stream,ri,i;
 	P poly;
 	P var;
 	NODE n,n0;
 	STRING fname,wname;
+	Obj t;
 
 	STOQ(-2,m2); STOQ(2,p2);
 	MKNODE(n,p2,0); MKNODE(defrange,m2,n); 
 	poly = 0; vl = 0; geom = 0; wname = 0; stream = -1; ri = 0;
+	v[0] = v[1] = 0;
 	for ( ; arg; arg = NEXT(arg) )
 		if ( !BDY(arg) )
 			stream = 0;
@@ -145,9 +158,9 @@ Obj *rp;
 		switch ( OID(BDY(arg)) ) {
 			case O_P:
 				poly = (P)BDY(arg); 
-				get_vars_recursive(poly,&vl);
+				get_vars_recursive((Obj)poly,&vl);
 				for ( vl0 = vl, i = 0; vl0; vl0 = NEXT(vl0) )
-					if ( vl0->v->attr == V_IND )
+					if ( vl0->v->attr == (pointer)V_IND )
 						if ( i >= 2 )
 							error("ifplot : invalid argument");
 						else
@@ -214,48 +227,66 @@ Obj *rp;
 	   	wname=name (STRING)]
 	*/
 
-	if ( stream < 0 )
-		stream = current_s;
-	else
-		current_s = stream;
+	stream = validate_ox_plot_stream(stream);
 	STOQ(stream,s_id);
 	if ( !geom ) {
 		STOQ(300,w300);
 		MKNODE(n0,w300,0); MKNODE(n,w300,n0); MKLIST(geom,n);
 	}
-	MKSTR(fname,"plot");
-	arg = mknode(8,s_id,fname,poly,xrange,yrange,0,geom,wname);
-	Pox_rpc(arg,rp);
+	if ( is_memory ) {
+		MKSTR(fname,"memory_plot");
+		arg = mknode(7,s_id,fname,poly,xrange,yrange,0,geom);
+		Pox_rpc(arg,&t);
+		arg = mknode(1,s_id);
+		Pox_pop_cmo(arg,rp);
+	} else {
+		MKSTR(fname,"plot");
+		arg = mknode(8,s_id,fname,poly,xrange,yrange,0,geom,wname);
+		Pox_rpc(arg,&t);
+		*rp = (Obj)s_id;
+	}
 }
 
-void Pmemory_ifplot(arg,rp)
-NODE arg;
-Obj *rp;
+void conplot_main(NODE arg,int is_memory, Obj *rp);
+
+void Pconplot(NODE arg,Obj *rp)
 {
+	conplot_main(arg,0,rp);
+}
+
+void Pmemory_conplot(NODE arg,Obj *rp)
+{
+	conplot_main(arg,1,rp);
+}
+
+void conplot_main(NODE arg,int is_memory,Obj *rp)
+{
 	Q m2,p2,w300,s_id;
 	NODE defrange;
-	LIST xrange,yrange,range[2],list,geom;
+	LIST xrange,yrange,zrange,range[3],list,geom;
 	VL vl,vl0;
 	V v[2],av[2];
-	int stream,ri,id,i;
+	int stream,ri,i;
 	P poly;
 	P var;
 	NODE n,n0;
 	STRING fname,wname;
+	Obj t;
 
 	STOQ(-2,m2); STOQ(2,p2);
 	MKNODE(n,p2,0); MKNODE(defrange,m2,n); 
-	poly = 0; vl = 0; geom = 0; stream = -1; ri = 0;
+	poly = 0; vl = 0; geom = 0; wname = 0; stream = -1; ri = 0;
+	v[0] = v[1] = 0;
 	for ( ; arg; arg = NEXT(arg) )
 		if ( !BDY(arg) )
 			stream = 0;
 		else
 		switch ( OID(BDY(arg)) ) {
 			case O_P:
-				poly = (P)BDY(arg); 
-				get_vars_recursive(poly,&vl);
+				poly = (P)BDY(arg);
+				get_vars_recursive((Obj)poly,&vl);
 				for ( vl0 = vl, i = 0; vl0; vl0 = NEXT(vl0) )
-					if ( vl0->v->attr == V_IND )
+					if ( vl0->v->attr == (pointer)V_IND )
 						if ( i >= 2 )
 							error("ifplot : invalid argument");
 						else
@@ -264,7 +295,7 @@ Obj *rp;
 			case O_LIST:
 				list = (LIST)BDY(arg);
 				if ( OID(BDY(BDY(list))) == O_P )
-					if ( ri > 1 )
+					if ( ri > 2 )
 						error("ifplot : invalid argument");
 					else
 						range[ri++] = list;
@@ -273,104 +304,138 @@ Obj *rp;
 				break;
 			case O_N:
 				stream = QTOS((Q)BDY(arg)); break;
+			case O_STR:
+				wname = (STRING)BDY(arg); break;
 			default:
-				error("memory_ifplot : invalid argument"); break;
+				error("ifplot : invalid argument"); break;
 		}
 	if ( !poly )
-		error("memory_ifplot : invalid argument");
+		error("ifplot : invalid argument");
 	switch ( ri ) {
 		case 0:
 			if ( !v[1] )
-				error("memory_ifplot : please specify all variables");
+				error("ifplot : please specify all variables");
 			MKV(v[0],var); MKNODE(n,var,defrange); MKLIST(xrange,n);
 			MKV(v[1],var); MKNODE(n,var,defrange); MKLIST(yrange,n);
+			MKNODE(n,0,defrange); MKLIST(zrange,n);
 			break;
 		case 1:
 			if ( !v[1] )
-				error("memory_ifplot : please specify all variables");
+				error("ifplot : please specify all variables");
 			av[0] = VR((P)BDY(BDY(range[0])));
 			if ( v[0] == av[0] ) {
 				xrange = range[0];
 				MKV(v[1],var); MKNODE(n,var,defrange); MKLIST(yrange,n);
+				MKNODE(n,0,defrange); MKLIST(zrange,n);
 			} else if ( v[1] == av[0] ) {
 				MKV(v[0],var); MKNODE(n,var,defrange); MKLIST(xrange,n);
 				yrange = range[0];
-			} else
-				error("memory_ifplot : invalid argument");
+				MKNODE(n,0,defrange); MKLIST(zrange,n);
+			} else {
+				MKV(v[0],var); MKNODE(n,var,defrange); MKLIST(xrange,n);
+				MKV(v[1],var); MKNODE(n,var,defrange); MKLIST(yrange,n);
+				zrange = range[0];
+			}
 			break;
-		case 2:
+		case 2: case 3:
 			av[0] = VR((P)BDY(BDY(range[0])));
 			av[1] = VR((P)BDY(BDY(range[1])));
 			if ( ((v[0] == av[0]) && (!v[1] || v[1] == av[1])) ||
 				 ((v[0] == av[1]) && (!v[1] || v[1] == av[0])) ) {
-					xrange = range[0]; yrange = range[1];
+				xrange = range[0]; yrange = range[1];
+				if ( ri == 3 )
+					zrange = range[2];
+				else {
+					MKNODE(n,0,defrange); MKLIST(zrange,n);
+				}
 			} else
-					error("memory_ifplot : invalid argument");
+				error("ifplot : invalid argument");
 			break;
 		default:
-			error("memory_ifplot : cannot happen"); break;
+			error("ifplot : cannot happen"); break;
 	}
-	/* memory_ifplot in ox_plot requires 
+	/* conplot in ox_plot requires 
 	   [s_id (Q),
 	   	formula (Obj),
 	   	xrange=[x,xmin,xmax] (LIST),
 	   	yrange=[y,ymin,ymax] (LIST),
-	   	zrange=0,
-	   	geom=[xsize,ysize] (LIST)]
+	   	zrange=[z,zmin,zmax] (LIST),
+	   	geom=[xsize,ysize] (LIST),
+	   	wname=name (STRING)]
 	*/
 
-	if ( stream < 0 )
-		stream = current_s;
-	else
-		current_s = stream;
+	stream = validate_ox_plot_stream(stream);
 	STOQ(stream,s_id);
 	if ( !geom ) {
 		STOQ(300,w300);
 		MKNODE(n0,w300,0); MKNODE(n,w300,n0); MKLIST(geom,n);
 	}
-	MKSTR(fname,"memory_plot");
-	arg = mknode(7,s_id,fname,poly,xrange,yrange,0,geom);
-	Pox_rpc(arg,rp);
+	if ( is_memory ) {
+		MKSTR(fname,"memory_plot");
+		arg = mknode(7,s_id,fname,poly,xrange,yrange,zrange,geom);
+		Pox_rpc(arg,&t);
+		arg = mknode(1,s_id);
+		Pox_pop_cmo(arg,rp);
+	} else {
+		MKSTR(fname,"plot");
+		arg = mknode(8,s_id,fname,poly,xrange,yrange,zrange,geom,wname);
+		Pox_rpc(arg,&t);
+		*rp = (Obj)s_id;
+	}
 }
 
-void Pconplot(arg,rp)
-NODE arg;
-Obj *rp;
+void plot_main(NODE arg,int is_memory,Obj *rp);
+
+void Pplot(NODE arg,Obj *rp)
 {
+	plot_main(arg,0,rp);
+}
+
+void Pmemory_plot(NODE arg,Obj *rp)
+{
+	plot_main(arg,1,rp);
+}
+
+void plot_main(NODE arg,int is_memory,Obj *rp)
+{
 	Q m2,p2,w300,s_id;
 	NODE defrange;
-	LIST xrange,yrange,zrange,range[3],list,geom;
+	LIST xrange,range[1],list,geom;
 	VL vl,vl0;
-	V v[2],av[2];
-	int stream,ri,id,i;
+	V v[1],av[1];
+	int stream,ri,i;
 	P poly;
 	P var;
 	NODE n,n0;
 	STRING fname,wname;
+	Obj t;
 
 	STOQ(-2,m2); STOQ(2,p2);
 	MKNODE(n,p2,0); MKNODE(defrange,m2,n); 
 	poly = 0; vl = 0; geom = 0; wname = 0; stream = -1; ri = 0;
+	v[0] = 0;
 	for ( ; arg; arg = NEXT(arg) )
 		if ( !BDY(arg) )
 			stream = 0;
 		else
 		switch ( OID(BDY(arg)) ) {
-			case O_P:
+			case O_P: case O_R:
 				poly = (P)BDY(arg);
-				get_vars_recursive(poly,&vl);
+				get_vars_recursive((Obj)poly,&vl);
 				for ( vl0 = vl, i = 0; vl0; vl0 = NEXT(vl0) )
-					if ( vl0->v->attr == V_IND )
-						if ( i >= 2 )
+					if ( vl0->v->attr == (pointer)V_IND )
+						if ( i >= 1 )
 							error("ifplot : invalid argument");
 						else
 							v[i++] = vl0->v;
+				if ( i != 1 )
+					error("ifplot : invalid argument");
 				break;
 			case O_LIST:
 				list = (LIST)BDY(arg);
 				if ( OID(BDY(BDY(list))) == O_P )
-					if ( ri > 2 )
-						error("ifplot : invalid argument");
+					if ( ri > 0 )
+						error("plot : invalid argument");
 					else
 						range[ri++] = list;
 				else
@@ -381,100 +446,74 @@ Obj *rp;
 			case O_STR:
 				wname = (STRING)BDY(arg); break;
 			default:
-				error("ifplot : invalid argument"); break;
+				error("plot : invalid argument"); break;
 		}
 	if ( !poly )
-		error("ifplot : invalid argument");
+		error("plot : invalid argument");
 	switch ( ri ) {
 		case 0:
-			if ( !v[1] )
-				error("ifplot : please specify all variables");
 			MKV(v[0],var); MKNODE(n,var,defrange); MKLIST(xrange,n);
-			MKV(v[1],var); MKNODE(n,var,defrange); MKLIST(yrange,n);
-			MKNODE(n,0,defrange); MKLIST(zrange,n);
 			break;
 		case 1:
-			if ( !v[1] )
-				error("ifplot : please specify all variables");
 			av[0] = VR((P)BDY(BDY(range[0])));
-			if ( v[0] == av[0] ) {
+			if ( v[0] == av[0] )
 				xrange = range[0];
-				MKV(v[1],var); MKNODE(n,var,defrange); MKLIST(yrange,n);
-				MKNODE(n,0,defrange); MKLIST(zrange,n);
-			} else if ( v[1] == av[0] ) {
-				MKV(v[0],var); MKNODE(n,var,defrange); MKLIST(xrange,n);
-				yrange = range[0];
-				MKNODE(n,0,defrange); MKLIST(zrange,n);
-			} else {
-				MKV(v[0],var); MKNODE(n,var,defrange); MKLIST(xrange,n);
-				MKV(v[1],var); MKNODE(n,var,defrange); MKLIST(yrange,n);
-				zrange = range[0];
-			}
+			else
+				error("plot : invalid argument");
 			break;
-		case 2: case 3:
-			av[0] = VR((P)BDY(BDY(range[0])));
-			av[1] = VR((P)BDY(BDY(range[1])));
-			if ( ((v[0] == av[0]) && (!v[1] || v[1] == av[1])) ||
-				 ((v[0] == av[1]) && (!v[1] || v[1] == av[0])) ) {
-				xrange = range[0]; yrange = range[1];
-				if ( ri == 3 )
-					zrange = range[2];
-				else {
-					MKNODE(n,0,defrange); MKLIST(zrange,n);
-				}
-			} else
-				error("ifplot : invalid argument");
-			break;
 		default:
-			error("ifplot : cannot happen"); break;
+			error("plot : cannot happen"); break;
 	}
-	if ( stream < 0 )
-		stream = current_s;
-	else
-		current_s = stream;
-
 	/* conplot in ox_plot requires 
 	   [s_id (Q),
 	   	formula (Obj),
 	   	xrange=[x,xmin,xmax] (LIST),
-	   	yrange=[y,ymin,ymax] (LIST),
-	   	zrange=[z,zmin,zmax] (LIST),
+	   	yrange=0,
+	   	zrange=0,
 	   	geom=[xsize,ysize] (LIST),
 	   	wname=name (STRING)]
 	*/
-
-	if ( stream < 0 )
-		stream = current_s;
-	else
-		current_s = stream;
+	stream = validate_ox_plot_stream(stream);
 	STOQ(stream,s_id);
 	if ( !geom ) {
 		STOQ(300,w300);
 		MKNODE(n0,w300,0); MKNODE(n,w300,n0); MKLIST(geom,n);
 	}
-	MKSTR(fname,"plot");
-	arg = mknode(8,s_id,fname,poly,xrange,yrange,zrange,geom,wname);
-	Pox_rpc(arg,rp);
+	if ( is_memory ) {
+		MKSTR(fname,"memory_plot");
+		arg = mknode(7,s_id,fname,poly,xrange,0,0,geom);
+		Pox_rpc(arg,&t);
+		arg = mknode(1,s_id);
+		Pox_pop_cmo(arg,rp);
+	} else {
+		MKSTR(fname,"plot");
+		arg = mknode(8,s_id,fname,poly,xrange,0,0,geom,wname);
+		Pox_rpc(arg,&t);
+		*rp = (Obj)s_id;
+	}
 }
 
-void Pplot(arg,rp)
-NODE arg;
-Obj *rp;
+#define Pi 3.14159265358979323846264
+
+void Ppolarplot(NODE arg,Q *rp)
 {
 	Q m2,p2,w300,s_id;
 	NODE defrange;
-	LIST xrange,range[1],list,geom;
+	LIST zrange,range[1],list,geom;
 	VL vl,vl0;
 	V v[1],av[1];
-	int stream,ri,id,i;
+	int stream,ri,i;
 	P poly;
 	P var;
 	NODE n,n0;
 	STRING fname,wname;
+	Real pi2;
+	Obj t;
 
-	STOQ(-2,m2); STOQ(2,p2);
-	MKNODE(n,p2,0); MKNODE(defrange,m2,n); 
+	MKReal(2*Pi,pi2);
+	MKNODE(n,pi2,0); MKNODE(defrange,0,n); 
 	poly = 0; vl = 0; geom = 0; wname = 0; stream = -1; ri = 0;
+	v[0] = 0;
 	for ( ; arg; arg = NEXT(arg) )
 		if ( !BDY(arg) )
 			stream = 0;
@@ -482,21 +521,21 @@ Obj *rp;
 		switch ( OID(BDY(arg)) ) {
 			case O_P: case O_R:
 				poly = (P)BDY(arg);
-				get_vars_recursive(poly,&vl);
+				get_vars_recursive((Obj)poly,&vl);
 				for ( vl0 = vl, i = 0; vl0; vl0 = NEXT(vl0) )
-					if ( vl0->v->attr == V_IND )
+					if ( vl0->v->attr == (pointer)V_IND )
 						if ( i >= 1 )
-							error("ifplot : invalid argument");
+							error("polarplot : invalid argument");
 						else
 							v[i++] = vl0->v;
 				if ( i != 1 )
-					error("ifplot : invalid argument");
+					error("polarplot : invalid argument");
 				break;
 			case O_LIST:
 				list = (LIST)BDY(arg);
 				if ( OID(BDY(BDY(list))) == O_P )
 					if ( ri > 0 )
-						error("plot : invalid argument");
+						error("polarplot : invalid argument");
 					else
 						range[ri++] = list;
 				else
@@ -507,74 +546,65 @@ Obj *rp;
 			case O_STR:
 				wname = (STRING)BDY(arg); break;
 			default:
-				error("plot : invalid argument"); break;
+				error("polarplot : invalid argument"); break;
 		}
 	if ( !poly )
-		error("plot : invalid argument");
+		error("polarplot : invalid argument");
 	switch ( ri ) {
 		case 0:
-			MKV(v[0],var); MKNODE(n,var,defrange); MKLIST(xrange,n);
+			MKV(v[0],var); MKNODE(n,var,defrange); MKLIST(zrange,n);
 			break;
 		case 1:
 			av[0] = VR((P)BDY(BDY(range[0])));
 			if ( v[0] == av[0] )
-				xrange = range[0];
+				zrange = range[0];
 			else
-				error("plot : invalid argument");
+				error("polarplot : invalid argument");
 			break;
 		default:
-			error("plot : cannot happen"); break;
+			error("polarplot : cannot happen"); break;
 	}
-	/* conplot in ox_plot requires 
-	   [s_id (Q),
-	   	formula (Obj),
-	   	xrange=[x,xmin,xmax] (LIST),
-	   	yrange=0,
-	   	zrange=0,
-	   	geom=[xsize,ysize] (LIST),
-	   	wname=name (STRING)]
-	*/
-	if ( stream < 0 )
-		stream = current_s;
-	else
-		current_s = stream;
+	stream = validate_ox_plot_stream(stream);
 	STOQ(stream,s_id);
 	if ( !geom ) {
 		STOQ(300,w300);
 		MKNODE(n0,w300,0); MKNODE(n,w300,n0); MKLIST(geom,n);
 	}
 	MKSTR(fname,"plot");
-	arg = mknode(8,s_id,fname,poly,xrange,0,0,geom,wname);
-	Pox_rpc(arg,rp);
+	arg = mknode(8,s_id,fname,poly,0,0,zrange,geom,wname);
+	Pox_rpc(arg,&t);
+	*rp = s_id;
 }
 
-void Pplotover(arg,rp)
-NODE arg;
-Obj *rp;
+void Pplotover(NODE arg,Q *rp)
 {
 	Q s_id,index;
 	P poly;
 	STRING fname;
+	Obj t;
 
 	poly = (P)ARG0(arg);
 	s_id = (Q)ARG1(arg);
 	index = (Q)ARG2(arg);
 	MKSTR(fname,"plotover");
-	arg = mknode(4,s_id,fname,index,poly);
-	Pox_rpc(arg,rp);
+	if ( argc(arg) == 4 )
+		arg = mknode(5,s_id,fname,index,poly,(Q)ARG3(arg));
+	else
+		arg = mknode(4,s_id,fname,index,poly);
+	Pox_rpc(arg,&t);
+	*rp = s_id;
 }
 
 /* arg = [x,y,r,s_id,index] */
 
-void Pdrawcircle(arg,rp)
-NODE arg;
-Obj *rp;
+void Pdrawcircle(NODE arg,Q *rp)
 {
 	Q s_id,index;
 	Obj x,y,r;
 	STRING fname;
 	NODE n;
 	LIST pos;
+	Obj t;
 
 	x = (Obj)ARG0(arg);
 	y = (Obj)ARG1(arg);
@@ -584,17 +614,17 @@ Obj *rp;
 	MKSTR(fname,"drawcircle");
 	n = mknode(3,x,y,r); MKLIST(pos,n);
 	arg = mknode(4,s_id,fname,index,pos);
-	Pox_rpc(arg,rp);
+	Pox_rpc(arg,&t);
+	*rp = s_id;
 }
 
 /* draw_obj(s_id,cindex,point|line); point = [x,y], line = [xa,ya,xb,yb] */
-void Pdraw_obj(arg,rp)
-NODE arg;
-Obj *rp;
+void Pdraw_obj(NODE arg,Q *rp)
 {
 	static STRING fname;
 	Q s_id,index;
 	LIST obj;
+	Obj t;
 
 	if ( !fname ) {
 		MKSTR(fname,"draw_obj");
@@ -607,30 +637,53 @@ Obj *rp;
 		arg = mknode(5,s_id,fname,index,obj,ARG3(arg));
 	else
 		arg = mknode(4,s_id,fname,index,obj);
-	Pox_cmo_rpc(arg,rp);
+	Pox_cmo_rpc(arg,&t);
+	*rp = s_id;
 }
 
-void Pclear_canvas(arg,rp)
-NODE arg;
-Obj *rp;
+/* draw_string(s_id,cindex,pos,string,[,color]); pos=[x,y] */
+void Pdraw_string(NODE arg,Q *rp)
 {
 	static STRING fname;
+	STRING str;
 	Q s_id,index;
-	LIST obj;
+	LIST pos;
+	Obj t;
 
 	if ( !fname ) {
+		MKSTR(fname,"draw_string");
+	}
+	s_id = (Q)ARG0(arg);
+	index = (Q)ARG1(arg);
+	pos = (LIST)ARG2(arg);
+	str = (STRING)ARG3(arg);
+	/* ARG4(arg) = color */
+	if ( argc(arg) == 5 )
+		arg = mknode(6,s_id,fname,index,pos,str,ARG4(arg));
+	else
+		arg = mknode(5,s_id,fname,index,pos,str);
+	Pox_cmo_rpc(arg,&t);
+	*rp = s_id;
+}
+
+void Pclear_canvas(NODE arg,Q *rp)
+{
+	static STRING fname;
+	Q s_id,index;
+	Obj t;
+
+	if ( !fname ) {
 		MKSTR(fname,"clear_canvas");
 	}
 	s_id = (Q)ARG0(arg);
 	index = (Q)ARG1(arg);
 	arg = mknode(3,s_id,fname,index);
-	Pox_cmo_rpc(arg,rp);
+	Pox_cmo_rpc(arg,&t);
+	*rp = s_id;
 }
 
 #if 0
-void Parrayplot(arg,rp)
-NODE arg;
-Obj *rp;
+void Parrayplot(NODE arg,Obj *rp)
 {
 	int s;
 	int id;