Debugger: Initial register get/set APIs.

Core/Debugger/WebSocket/WebSocketUtils.cpp

@@ -0,0 +1,106 @@
+// Copyright (c) 2018- PPSSPP Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0 or later versions.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official git repository and contact information can be found at
+// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
+
+#include "Common/StringUtils.h"
+#include "Core/Debugger/WebSocket/WebSocketUtils.h"
+
+JsonWriter &DebuggerRequest::Respond() {
+	writer_.begin();
+	writer_.writeString("event", name);
+	DebuggerJsonAddTicket(writer_, data);
+
+	responseBegun_ = true;
+	return writer_;
+}
+
+void DebuggerRequest::Finish() {
+	if (responseBegun_ && !responseSent_) {
+		writer_.end();
+		ws->Send(writer_.str());
+		responseBegun_ = false;
+		responseSent_ = true;
+	}
+}
+
+static bool U32FromString(const char *str, uint32_t *out, bool allowFloat) {
+	if (TryParse(str, out))
+		return true;
+
+	// Now let's try signed (the above parses only positive.)
+	if (str[0] == '-' && TryParse(&str[1], out)) {
+		*out = static_cast<uint32_t>(-static_cast<int>(*out));
+		return true;
+	}
+
+	// We have to try float last because we use float bits.
+	union {
+		uint32_t u;
+		float f;
+	} bits;
+	if (allowFloat && TryParse(str, &bits.f)) {
+		*out = bits.u;
+		return true;
+	}
+
+	return false;
+}
+
+bool DebuggerRequest::ParamU32(const char *name, uint32_t *out) {
+	const JsonNode *node = data.get(name);
+	if (!node) {
+		Fail(StringFromFormat("Missing '%s' parameter", name));
+		return false;
+	}
+
+	// TODO: For now, only supporting strings.  Switch to gason?
+	// Otherwise we get overflow (signed integer parsing.)
+	if (node->value.getTag() != JSON_STRING) {
+		Fail(StringFromFormat("Invalid '%s' parameter type", name));
+		return false;
+	}
+
+	if (U32FromString(node->value.toString(), out, false))
+		return true;
+
+	Fail(StringFromFormat("Could not parse '%s' parameter", name));
+	return false;
+}
+
+bool DebuggerRequest::ParamU32OrFloatBits(const char *name, uint32_t *out) {
+	const JsonNode *node = data.get(name);
+	if (!node) {
+		Fail(StringFromFormat("Missing '%s' parameter", name));
+		return false;
+	}
+
+	// TODO: For now, only supporting strings and floats.  Switch to gason?
+	// Otherwise we get overflow (signed integer parsing.)
+	if (node->value.getTag() == JSON_NUMBER) {
+		Fail(StringFromFormat("Could not parse '%s' parameter: outside 32 bit range (use string for float)", name));
+		return false;
+	}
+	if (node->value.getTag() != JSON_STRING) {
+		Fail(StringFromFormat("Invalid '%s' parameter type", name));
+		return false;
+	}
+
+	if (U32FromString(node->value.toString(), out, true))
+		return true;
+
+	Fail(StringFromFormat("Could not parse '%s' parameter", name));
+	return false;
+}