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authorAndrei Karas <akaras@inbox.ru>2011-01-02 01:48:38 +0200
committerAndrei Karas <akaras@inbox.ru>2011-01-02 02:41:24 +0200
commit3eeae12c498d1a4dbe969462d2ba841f77ee3ccb (patch)
treeff8eab35e732bc0749fc11677c8873a7b3a58704 /src/net/messagein.cpp
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Initial commit.
This code based on mana client http://www.gitorious.org/mana/mana and my private repository.
Diffstat (limited to 'src/net/messagein.cpp')
-rw-r--r--src/net/messagein.cpp227
1 files changed, 227 insertions, 0 deletions
diff --git a/src/net/messagein.cpp b/src/net/messagein.cpp
new file mode 100644
index 000000000..0ac391ee2
--- /dev/null
+++ b/src/net/messagein.cpp
@@ -0,0 +1,227 @@
+/*
+ * The Mana Client
+ * Copyright (C) 2004-2009 The Mana World Development Team
+ * Copyright (C) 2009-2010 The Mana Developers
+ *
+ * This file is part of The Mana Client.
+ *
+ * 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; either version 2 of the License, or
+ * any later version.
+ *
+ * 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "net/messagein.h"
+
+#include "net/packetcounters.h"
+
+#include "log.h"
+
+#include "utils/stringutils.h"
+
+#define MAKEWORD(low, high) \
+ ((unsigned short)(((unsigned char)(low)) | \
+ ((unsigned short)((unsigned char)(high))) << 8))
+
+namespace Net
+{
+
+MessageIn::MessageIn(const char *data, unsigned int length):
+ mData(data),
+ mLength(length),
+ mPos(0)
+{
+ PacketCounters::incInPackets();
+ DEBUGLOG("MessageIn");
+}
+
+unsigned char MessageIn::readInt8()
+{
+ unsigned char value = -1;
+ if (mPos < mLength)
+ value = static_cast<unsigned char>(mData[mPos]);
+
+ mPos += 1;
+ PacketCounters::incInBytes(1);
+ DEBUGLOG("readInt8: " + toString(static_cast<int>(value)));
+ return value;
+}
+
+void MessageIn::readCoordinates(Uint16 &x, Uint16 &y)
+{
+ if (mPos + 3 <= mLength)
+ {
+ unsigned char const *p
+ = reinterpret_cast< unsigned char const * >(mData + mPos);
+ x = static_cast<short unsigned>(p[0] | ((p[1] & 0x07) << 8));
+ y = static_cast<short unsigned>((p[1] >> 3) | ((p[2] & 0x3F) << 5));
+ }
+ mPos += 3;
+ PacketCounters::incInBytes(3);
+ DEBUGLOG("readCoordinates: " + toString(static_cast<int>(x)) + ","
+ + toString(static_cast<int>(y)));
+}
+
+void MessageIn::readCoordinates(Uint16 &x, Uint16 &y, Uint8 &direction)
+{
+ if (mPos + 3 <= mLength)
+ {
+ const char *data = mData + mPos;
+ Sint16 temp;
+
+ temp = MAKEWORD(data[1] & 0x00c0, data[0] & 0x00ff);
+ x = static_cast<unsigned short>(temp >> 6);
+ temp = MAKEWORD(data[2] & 0x00f0, data[1] & 0x003f);
+ y = static_cast<unsigned short>(temp >> 4);
+
+ direction = data[2] & 0x000f;
+
+ // Translate from eAthena format
+ switch (direction)
+ {
+ case 0:
+ direction = 1;
+ break;
+ case 1:
+ direction = 3;
+ break;
+ case 2:
+ direction = 2;
+ break;
+ case 3:
+ direction = 6;
+ break;
+ case 4:
+ direction = 4;
+ break;
+ case 5:
+ direction = 12;
+ break;
+ case 6:
+ direction = 8;
+ break;
+ case 7:
+ direction = 9;
+ break;
+ default:
+ // OOPSIE! Impossible or unknown
+ direction = 0;
+ }
+ }
+ mPos += 3;
+ PacketCounters::incInBytes(3);
+ DEBUGLOG("readCoordinates: " + toString((int)x) + "," + toString((int)y));
+}
+
+void MessageIn::readCoordinatePair(Uint16 &srcX, Uint16 &srcY,
+ Uint16 &dstX, Uint16 &dstY)
+{
+ if (mPos + 5 <= mLength)
+ {
+ const char *data = mData + mPos;
+ Sint16 temp;
+
+ temp = MAKEWORD(data[3], data[2] & 0x000f);
+ dstX = static_cast<unsigned short>(temp >> 2);
+
+ dstY = MAKEWORD(data[4], data[3] & 0x0003);
+
+ temp = MAKEWORD(data[1], data[0]);
+ srcX = static_cast<unsigned short>(temp >> 6);
+
+ temp = MAKEWORD(data[2], data[1] & 0x003f);
+ srcY = static_cast<unsigned short>(temp >> 4);
+ }
+ mPos += 5;
+ DEBUGLOG("readCoordinatePair: " + toString((int)srcX) + ","
+ + toString((int)srcY) + " " + toString((int)dstX) + ","
+ + toString((int)dstY));
+ PacketCounters::incInBytes(5);
+}
+
+void MessageIn::skip(unsigned int length)
+{
+ mPos += length;
+ PacketCounters::incInBytes(length);
+ DEBUGLOG("skip: " + toString((int)length));
+}
+
+std::string MessageIn::readString(int length)
+{
+ // Get string length
+ if (length < 0)
+ length = readInt16();
+
+ // Make sure the string isn't erroneous
+ if (length < 0 || mPos + length > mLength)
+ {
+ mPos = mLength + 1;
+ DEBUGLOG("readString error");
+ return "";
+ }
+
+ // Read the string
+ char const *stringBeg = mData + mPos;
+ char const *stringEnd
+ = static_cast<char const *>(memchr(stringBeg, '\0', length));
+
+ std::string readString(stringBeg,
+ stringEnd ? stringEnd - stringBeg : length);
+ mPos += length;
+ PacketCounters::incInBytes(length);
+ DEBUGLOG("readString: " + readString);
+ return readString;
+}
+
+std::string MessageIn::readRawString(int length)
+{
+ // Get string length
+ if (length < 0)
+ length = readInt16();
+
+ // Make sure the string isn't erroneous
+ if (length < 0 || mPos + length > mLength)
+ {
+ mPos = mLength + 1;
+ return "";
+ }
+
+ // Read the string
+ char const *stringBeg = mData + mPos;
+ char const *stringEnd
+ = static_cast<char const *>(memchr(stringBeg, '\0', length));
+ std::string readString(stringBeg,
+ stringEnd ? stringEnd - stringBeg : length);
+
+ mPos += length;
+ PacketCounters::incInBytes(length);
+ DEBUGLOG("readString: " + readString);
+
+ if (stringEnd)
+ {
+ long len2 = length - (stringEnd - stringBeg) - 1;
+ char const *stringBeg2 = stringEnd + 1;
+ char const *stringEnd2
+ = static_cast<char const *>(memchr(stringBeg2, '\0', len2));
+ std::string hiddenPart = std::string(stringBeg2,
+ stringEnd2 ? stringEnd2 - stringBeg2 : len2);
+ if (hiddenPart.length() > 0)
+ {
+ DEBUGLOG("readString2: " + hiddenPart);
+
+ return readString + "|" + hiddenPart;
+ }
+ }
+
+ return readString;
+}
+
+}