3 files changed, 51 insertions, 10 deletions

diff --git a/misc/yosysjs/demo02.html b/misc/yosysjs/demo02.html
index a6c4eb96..9191db98 100644
--- a/misc/yosysjs/demo02.html
+++ b/misc/yosysjs/demo02.html
@@ -54,42 +54,50 @@ endmodule
 			document.getElementById('popup').style.visibility = 'hidden';
 			document.getElementById('popupmsg').textContent = 'Please wait..';
 		}
+		function handle_run_errors(logmsg, errmsg) {
+			if (errmsg != "") {
+				window.alert(errmsg);
+				document.getElementById('popup').style.visibility = 'hidden';
+			}
+		}
 		function synth1() {
 			document.getElementById('popup').style.visibility = 'visible';
 			ys.write_file("input.v", document.getElementById('code').value);
-			ys.run('design -reset; read_verilog input.v; show -stretch');
+			ys.run('design -reset; read_verilog input.v; show -stretch', handle_run_errors);
 			ys.read_file('show.dot', (function(text){
-				YosysJS.dot_into_svg(text, 'svg');
+				console.log(ys.errmsg);
+				if (ys.errmsg == "") YosysJS.dot_into_svg(text, 'svg');
 				document.getElementById('popup').style.visibility = 'hidden';
 			}));
 		}
 		function synth2() {
 			document.getElementById('popup').style.visibility = 'visible';
 			ys.write_file("input.v", document.getElementById('code').value);
-			ys.run('design -reset; read_verilog input.v; proc; opt_clean; show -stretch');
+			ys.run('design -reset; read_verilog input.v; proc; opt_clean; show -stretch', handle_run_errors);
 			ys.read_file('show.dot', (function(text){
-				YosysJS.dot_into_svg(text, 'svg');
+				if (ys.errmsg == "") YosysJS.dot_into_svg(text, 'svg');
 				document.getElementById('popup').style.visibility = 'hidden';
 			}));
 		}
 		function synth3() {
 			document.getElementById('popup').style.visibility = 'visible';
 			ys.write_file("input.v", document.getElementById('code').value);
-			ys.run('design -reset; read_verilog input.v; synth -run coarse; show -stretch');
+			ys.run('design -reset; read_verilog input.v; synth -run coarse; show -stretch', handle_run_errors);
 			ys.read_file('show.dot', (function(text){
-				YosysJS.dot_into_svg(text, 'svg');
+				if (ys.errmsg == "") YosysJS.dot_into_svg(text, 'svg');
 				document.getElementById('popup').style.visibility = 'hidden';
 			}));
 		}
 		function synth4() {
 			document.getElementById('popup').style.visibility = 'visible';
 			ys.write_file("input.v", document.getElementById('code').value);
-			ys.run('design -reset; read_verilog input.v; synth -run coarse; synth -run fine; show -stretch');
+			ys.run('design -reset; read_verilog input.v; synth -run coarse; synth -run fine; show -stretch', handle_run_errors);
 			ys.read_file('show.dot', (function(text){
-				YosysJS.dot_into_svg(text, 'svg');
+				if (ys.errmsg == "") YosysJS.dot_into_svg(text, 'svg');
 				document.getElementById('popup').style.visibility = 'hidden';
 			}));
 		}
 		var ys = YosysJS.create_worker(on_ys_ready);
+		ys.verbose(true);
 	</script>
 </body></html>
diff --git a/misc/yosysjs/yosysjs.js b/misc/yosysjs/yosysjs.js
index 9723386f..eabc0ec5 100644
--- a/misc/yosysjs/yosysjs.js
+++ b/misc/yosysjs/yosysjs.js
@@ -227,6 +227,7 @@ var YosysJS = new function() {
 		ys.worker = new Worker('yosyswrk.js');
 		ys.callback_idx = 1;
 		ys.callback_cache = {};
+		ys.errmsg = "";
 
 		ys.callback_cache[0] = on_ready;
 		on_ready = null;
@@ -235,6 +236,7 @@ var YosysJS = new function() {
 			var response = e.data[0];
 			var callback = ys.callback_cache[response.idx];
 			delete ys.callback_cache[response.idx];
+			if ("errmsg" in response) ys.errmsg = response.errmsg;
 			if (callback) callback.apply(null, response.args);
 		}
 
@@ -294,6 +296,17 @@ var YosysJS = new function() {
 			ys.worker.postMessage([request]);
 		}
 
+		ys.verbose = function(value, callback) {
+			var request = {
+				"idx": ys.callback_idx,
+				"mode": "verbose",
+				"value": value
+			};
+
+			ys.callback_cache[ys.callback_idx++] = callback;
+			ys.worker.postMessage([request]);
+		}
+
 		return ys;
 	}
 }
diff --git a/misc/yosysjs/yosyswrk.js b/misc/yosysjs/yosyswrk.js
index 1d77b3d2..b6173439 100644
--- a/misc/yosysjs/yosyswrk.js
+++ b/misc/yosysjs/yosyswrk.js
@@ -1,3 +1,13 @@
+var Module = {};
+var verbose_mode = false;
+var text_buffer = "";
+
+Module["printErr"] = Module["print"] = function(text) {
+	if (verbose_mode)
+		console.log(text);
+	text_buffer += text + "\n";
+}
+
 importScripts('yosys.js');
 
 onmessage = function(e) {
@@ -5,12 +15,16 @@ onmessage = function(e) {
 	var response = { "idx": request.idx, "args": [] };
 
 	if (request.mode == "run") {
+		response["errmsg"] = "";
 		try {
+			text_buffer = "";
 			Module.ccall('run', '', ['string'], [request.cmd]);
-			response.args.push("");
 		} catch (e) {
-			response.args.push(mod.ccall('errmsg', 'string', [], []));
+			response.errmsg = Module.ccall('errmsg', 'string', [], []);
 		}
+		response.args.push(text_buffer);
+		response.args.push(response.errmsg);
+		text_buffer = "";
 	}
 
 	if (request.mode == "read_file") {
@@ -37,6 +51,12 @@ onmessage = function(e) {
 		} catch (e) { }
 	}
 
+	if (request.mode == "verbose") {
+		if (request.value)
+			console.log(text_buffer);
+		verbose_mode = request.value;
+	}
+
 	postMessage([response]);
 }