1 files changed, 198 insertions, 0 deletions
diff --git a/net/messagein.cpp b/net/messagein.cpp
new file mode 100644
index 0000000..192e857
--- /dev/null
+++ b/net/messagein.cpp
@@ -0,0 +1,198 @@
+/*
+ *  The Mana World
+ *  Copyright 2004 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  $Id: messagein.cpp 2158 2006-02-07 10:37:54Z der_doener $
+ */
+
+#include "messagein.h"
+
+#include <cassert>
+#include <SDL.h>
+#include <SDL_endian.h>
+
+#define MAKEWORD(low,high) \
+    ((unsigned short)(((unsigned char)(low)) | \
+    ((unsigned short)((unsigned char)(high))) << 8))
+
+
+MessageIn::MessageIn(const char *data, unsigned int length):
+    mData(data),
+    mLength(length),
+    mPos(0)
+{
+    // Read the message ID
+    mId = readInt16();
+}
+
+Sint8
+MessageIn::readInt8()
+{
+    assert(mPos < mLength);
+    return mData[mPos++];
+}
+
+Sint16
+MessageIn::readInt16()
+{
+    assert(mPos + 2 <= mLength);
+    mPos += 2;
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+    return SDL_Swap16(*(Sint16*)(mData + (mPos - 2)));
+#else
+    return (*(Sint16*)(mData + (mPos - 2)));
+#endif
+}
+
+Sint32
+MessageIn::readInt32()
+{
+    assert(mPos + 4 <= mLength);
+    mPos += 4;
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+    return SDL_Swap32(*(Sint32*)(mData + (mPos - 4)));
+#else
+    return (*(Sint32*)(mData + (mPos - 4)));
+#endif
+}
+
+void
+MessageIn::readCoordinates(Uint16 &x, Uint16 &y, Uint8 &direction)
+{
+    assert(mPos + 3 <= mLength);
+
+    const char *data = mData + mPos;
+    Sint16 temp;
+
+    temp = MAKEWORD(data[1] & 0x00c0, data[0] & 0x00ff);
+    x = temp >> 6;
+    temp = MAKEWORD(data[2] & 0x00f0, data[1] & 0x003f);
+    y = 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;
+}
+
+void
+MessageIn::readCoordinatePair(Uint16 &srcX, Uint16 &srcY,
+                              Uint16 &dstX, Uint16 &dstY)
+{
+    assert(mPos + 5 <= mLength);
+
+    const char *data = mData + mPos;
+    Sint16 temp;
+
+    temp = MAKEWORD(data[3], data[2] & 0x000f);
+    dstX = temp >> 2;
+
+    dstY = MAKEWORD(data[4], data[3] & 0x0003);
+
+    temp = MAKEWORD(data[1], data[0]);
+    srcX = temp >> 6;
+
+    temp = MAKEWORD(data[2], data[1] & 0x003f);
+    srcY = temp >> 4;
+
+    mPos += 5;
+}
+
+void
+MessageIn::skip(unsigned int length)
+{
+    assert(mPos + length <= mLength);
+    mPos += length;
+}
+
+std::string
+MessageIn::readString(int length)
+{
+    int stringLength = 0;
+
+    // Get string length
+    if (length < 0) {
+        stringLength = readInt16();
+    } else {
+        stringLength = length;
+    }
+
+    // Make sure there is enough data available
+    assert(mPos + length <= mLength);
+
+    // Read the string
+    char *tmpString = new char[stringLength + 1];
+    memcpy(tmpString, (void*)&mData[mPos], stringLength);
+    tmpString[stringLength] = 0;
+    mPos += stringLength;
+
+    std::string read = tmpString;
+    delete[] tmpString;
+
+    return read;
+}
+
+Sint8& operator<<(Sint8 &lhs, MessageIn &msg)
+{
+    lhs = msg.readInt8();
+    return lhs;
+}
+
+Sint16& operator<<(Sint16 &lhs, MessageIn &msg)
+{
+    lhs = msg.readInt16();
+    return lhs;
+}
+
+Sint32& operator<<(Sint32 &lhs, MessageIn &msg)
+{
+    lhs = msg.readInt32();
+    return lhs;
+}