--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lzfu.c	Fri Jul 09 07:26:16 2004 -0700
@@ -0,0 +1,125 @@
+ /*
+     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
+     (at your option) any later version.
+
+     You should have received a copy of the GNU General Public License
+     along with this program; if not, write to the Free Software Foundation,
+     Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+  */
+
+#include "define.h"
+#include "libpst.h"
+#include <sys/types.h>
+#include <string.h>
+#include <stdio.h>
+
+#ifndef _MSC_VER
+#include <stdint.h>
+#endif
+
+#ifdef _MSC_VER
+#define uint32_t unsigned int
+#endif
+
+#define LZFU_COMPRESSED         0x75465a4c
+#define LZFU_UNCOMPRESSED       0x414c454d
+
+// initital dictionary
+#define LZFU_INITDICT   "{\\rtf1\\ansi\\mac\\deff0\\deftab720{\\fonttbl;}" \
+                                                 "{\\f0\\fnil \\froman \\fswiss \\fmodern \\fscrip" \
+                                                 "t \\fdecor MS Sans SerifSymbolArialTimes Ne" \
+                                                 "w RomanCourier{\\colortbl\\red0\\green0\\blue0" \
+                                                 "\r\n\\par \\pard\\plain\\f0\\fs20\\b\\i\\u\\tab" \
+                                                 "\\tx"
+// initial length of dictionary
+#define LZFU_INITLENGTH 207
+
+// header for compressed rtf
+typedef struct _lzfuheader {
+  uint32_t cbSize;
+  uint32_t cbRawSize;
+  uint32_t dwMagic;
+  uint32_t dwCRC;
+} lzfuheader;
+
+
+/** 
+    We always need to add 0x10 to the buffer offset because we need to skip past the header info
+*/
+
+unsigned char* lzfu_decompress (unsigned char* rtfcomp) {
+  // the dictionary buffer
+  unsigned char dict[4096];
+  // the dictionary pointer
+  unsigned int dict_length=0;
+  // the header of the lzfu block
+  lzfuheader lzfuhdr;
+  // container for the data blocks
+  unsigned char flags;
+  // temp value for determining the bits in the flag
+  unsigned char flag_mask;
+  unsigned int i, in_size;
+  unsigned char *out_buf;
+  unsigned int out_ptr = 0;
+
+  memcpy(dict, LZFU_INITDICT, LZFU_INITLENGTH);
+  dict_length = LZFU_INITLENGTH;
+  memcpy(&lzfuhdr, rtfcomp, sizeof(lzfuhdr));
+  LE32_CPU(lzfuhdr.cbSize);   LE32_CPU(lzfuhdr.cbRawSize);
+  LE32_CPU(lzfuhdr.dwMagic);  LE32_CPU(lzfuhdr.dwCRC);
+  /*  printf("total size: %d\n", lzfuhdr.cbSize+4);
+  printf("raw size  : %d\n", lzfuhdr.cbRawSize);
+  printf("compressed: %s\n", (lzfuhdr.dwMagic == LZFU_COMPRESSED ? "yes" : "no"));
+  printf("CRC       : %#x\n", lzfuhdr.dwCRC);
+  printf("\n");*/
+  out_buf = (unsigned char*)xmalloc(lzfuhdr.cbRawSize+20); //plus 4 cause we have 2x'}' and a \0
+  in_size = 0;
+  // we add plus one here cause when referencing an array, the index is always one less 
+  // (ie, when accessing 2 element array, highest index is [1])
+  while (in_size+0x11 < lzfuhdr.cbSize) {
+    memcpy(&flags, &(rtfcomp[in_size+0x10]), 1);
+    in_size += 1;
+
+    flag_mask = 1;
+    while (flag_mask != 0 && in_size+0x11 < lzfuhdr.cbSize) {
+      if (flag_mask & flags) {
+	// read 2 bytes from input
+	unsigned short int blkhdr, offset, length;
+	memcpy(&blkhdr, &(rtfcomp[in_size+0x10]), 2);
+	LE16_CPU(blkhdr);
+	in_size += 2;
+	/* swap the upper and lower bytes of blkhdr */
+	blkhdr = (((blkhdr&0xFF00)>>8)+
+		  ((blkhdr&0x00FF)<<8));
+	/* the offset is the first 24 bits of the 32 bit value */
+	offset = (blkhdr&0xFFF0)>>4;
+	/* the length of the dict entry are the last 8 bits */
+	length = (blkhdr&0x000F)+2;
+	// add the value we are about to print to the dictionary
+	for (i=0; i < length; i++) {
+	  unsigned char c1;
+	  c1 = dict[(offset+i)%4096];
+	  dict[dict_length]=c1;
+	  dict_length = (dict_length+1) % 4096;
+	  out_buf[out_ptr++] = c1;
+	}
+      } else {
+	// uncompressed chunk (single byte)
+	char c1 = rtfcomp[in_size+0x10];
+	in_size ++;
+	dict[dict_length] = c1;
+	dict_length = (dict_length+1)%4096;
+	out_buf[out_ptr++] = c1;
+      }
+      flag_mask <<= 1;
+    }
+  }
+  // the compressed version doesn't appear to drop the closing braces onto the doc.
+  // we should do that
+  out_buf[out_ptr++] = '}';
+  out_buf[out_ptr++] = '}';
+  out_buf[out_ptr++] = '\0';
+  return out_buf;
+}