changes from r49 to r67

git-svn-id: https://clonekeenplus.svn.sourceforge.net/svnroot/clonekeenplus/cgenius/trunk@82 4df4b0f3-56ce-47cb-b001-ed939b7d65a6

src/fileio/lzexe.cpp

@@ -0,0 +1,150 @@
+/*
+ * lzexe.c
+ *
+ *  Created on: 24.01.2009
+ *      Author: gerstrong
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+int get_bit(int *p_bit_count, FILE **fin)
+{
+  static unsigned short bits;
+  int bit;
+
+  bit = bits & 1;
+  (*p_bit_count)--;
+
+  if ((*p_bit_count) <= 0)
+  {
+    bits = getc(*fin) | getc(*fin) << 8;
+
+    if ((*p_bit_count) == -1) /* special case for first bit word */
+    {
+      bit = bits & 1;
+      bits >>= 1;
+    }
+
+    (*p_bit_count) += 16;
+  }
+  else
+    bits >>= 1;
+
+  return bit;
+}
+
+int getEXEVersion(int episode, int bufsize)
+{
+    switch (bufsize)
+    {
+		case 99762:
+			if(episode != 1)
+				return -1;
+			else
+				return 110;
+		case 99972:
+			if(episode != 1)
+				return -1;
+			else
+				return 131;
+
+		case 398:
+			if(episode != 1)
+				return -1;
+			else
+				return 134;
+
+		case 118114:
+			if(episode != 2)
+				return -1;
+			else
+				return 100;
+
+		case 118160:
+
+			if(episode != 2)
+				return -1;
+			else
+				return 131;
+
+		case 127086:
+
+			if(episode != 3)
+				return -1;
+			else
+				return 100;
+
+		case 127104:
+			if(episode != 3)
+				return -1;
+			else
+				return 131;
+
+		default: return -2;
+    }
+
+}
+
+// return how much was unpacked or zero if nothing was unpacked
+int unlzexe(FILE *fin, unsigned char *outbuffer)
+{
+	  int bit_count;
+	  short offset;
+	  int pos, repeat;
+
+	  pos = 0;
+	  bit_count = 0;
+
+      /* skip header */
+		  fseek(fin, 32, SEEK_SET);
+
+		  while (1)
+		  {
+
+			  if (get_bit(&bit_count, &fin))
+			  {
+				  outbuffer[pos++] = getc(fin);
+			  }
+			  else
+			  {
+				  if (get_bit(&bit_count, &fin))
+				  {
+					  unsigned char tmp[2];
+					  fread(tmp, 1, 2, fin);
+					  repeat = (tmp[1] & 0x07);
+
+					  offset = ((tmp[1] & ~0x07) << 5) | tmp[0] | 0xE000;
+
+					  if (repeat == 0)
+					  {
+						  repeat = getc (fin);
+
+
+						  if (repeat == 0)
+							  break;
+						  else if (repeat == 1)
+							  continue;
+						  else
+							  repeat++;
+					  }
+					  else
+						  repeat += 2;
+				  }
+				  else
+				  {
+					  repeat = ((get_bit(&bit_count, &fin) << 1) | get_bit(&bit_count, &fin)) + 2;
+					  offset = getc(fin) | 0xFF00;
+				  }
+
+				  while (repeat > 0)
+				  {
+					  outbuffer[pos] = outbuffer[pos + offset];
+					  pos++;
+					  repeat--;
+				  }
+			}
+		  }
+
+		  return pos;
+}