Enclosed the INSTALL file for European.

[lha/lha.git] / Hacking_of_LHa

diff --git a/Hacking_of_LHa b/Hacking_of_LHa
index 67f4070..37343d9 100644 (file)
--- a/Hacking_of_LHa
+++ b/Hacking_of_LHa
@@ -1,6 +1,6 @@
 $Id$
 
-               The Hacking of LHa for UNIX (2nd draft)
+               The Hacking of LHa for UNIX (3rd draft)
              -------------------------------------------
 
                                 Koji Arai <arai@users.sourceforge.jp>
@@ -23,8 +23,17 @@ $Id$
 ½èÍý¤Ë´Ø¤·¤Æ¤Ï̵ÃΤǤ¢¤ë¡£ÍѸì¤Î»È¤¤ÊýÅù¤ÏŬÀڤǤʤ¤¤«¤â¤·¤ì¤Ê¤¤¤Î¤Ç¤³
 ¤ÎÊýÌ̤Ǥâ¸æ»ØƳ失¤ì¤Ð¹¬¤¤¤Ç¤¢¤ë¡£
 
+< Ìܼ¡ >
+
+ɽµ­¤Ë¤Ä¤¤¤Æ
+slide ¼­½ñË¡ (slide.c)
+bit Æþ½ÐÎϥ롼¥Á¥ó (crcio.c)
+Huffman ˡ (huf.c)
+LHA ¥Õ¥¡¥¤¥ë¤Î¹½Â¤(¤Þ¤È¤á)
+¥»¥­¥å¥ê¥Æ¥£¥Ð¥°¤Î¹Í»¡
+
 ===============================================================================
-o ɽµ­¤Ë¤Ä¤¤¤Æ
+ɽµ­¤Ë¤Ä¤¤¤Æ
 
 * ´Ø¿ô¤Ï¡¢¤½¤ÎÄêµÁ¥½¡¼¥¹ file.c ¤È´Ø¿ô̾ func() ¤ò¼¨¤¹¤Î¤Ë
      file.c:func()
@@ -532,7 +541,7 @@ hash[] 
 
 ----------------------------------------------------------------------------
 < ½é´ü¾õÂÖ >
-                                
+
                                 dicsiz=2^dicbit               2*2^dicbit
                                    v                           v   txtsiz
        +-------------+-------------+-------------+-------------+---+
@@ -938,7 +947,7 @@ maxmatch 
 (pos, remainder ¤Ï¡¢get_next() ¤Ç¹¹¿·¤µ¤ì¤Æ¤¤¤ë¤³¤È¤ËÃí°Õ)
 
 ----------------------------------------------------------------------------
-                                
+
                                 dicsiz=2^dicbit               2*2^dicbit
                                    v                           v   txtsiz
        +-------------+-------------+-------------+-------------+---+
@@ -1131,7 +1140,7 @@ while 
 ¤Ê¤ï¤±¤À¡£¤µ¤é¤Ë¡¢pos¤Ï¸½»þÅÀ¤Ç dicbit+1 ¤Ç¤¢¤ë¤«¤é¡¢1 ¤À¡£¿Þ¤Ë½ñ¤³¤¦¡£
 
 ----------------------------------------------------------------------------
-                                
+
                                 dicsiz=2^dicbit               2*2^dicbit
                                    v                           v   txtsiz
        +-------------+-------------+-------------+-------------+---+
@@ -1518,7 +1527,7 @@ remainder 
 ¤Î¾õÂÖ¤À¡£¤³¤ì¤¬¡¢update() ¤ò¸Æ¤Ó½Ð¤¹»þ¤Î½é´ü¾õÂÖ¤À¡£
 
 ----------------------------------------------------------------------------
-                                
+
                                 dicsiz=2^dicbit               2*2^dicbit
                                    v                           v   txtsiz
        +-------------+-------------+-------------+-------------+---+
@@ -1581,7 +1590,7 @@ static void update()
 ¤ì¤Æ¤¤¤ë¡£¤³¤ì¤Ï¤Ä¤Þ¤ê¿Þ¼¨¤¹¤ë¤È¡¢°Ê²¼¤Î¾õÂ֤ˤʤë¤È¸À¤¦»ö¤À
 
 ----------------------------------------------------------------------------
-                                
+
                                 dicsiz=2^dicbit               2*2^dicbit
                                    v                           v   txtsiz
        +-------------+-------------+---+---------+-------------+---+
@@ -2506,7 +2515,7 @@ putcode() 
           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
           |* * *          |x y z                          |
           +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-         /               / <-n->        
+         /               / <-n->
       subbitbuf         x
                  <-------->
                   bitcount
@@ -2561,6 +2570,7 @@ init_putbits()
 ¤Æ¤¤¤ë¤Î¤Ï LHa ¤Ë¤È¤Ã¤Æ½ÅÍפʻö¤À¡£decode ½èÍý¤Ç¤ÏľÀÜ bitbuf ¤ò»²¾È¤¹
 ¤ë²Õ½ê¤¬¤¢¤ë¡£
 
+\f
 Huffman ˡ (huf.c)
 ------------------
 
@@ -2959,7 +2969,7 @@ left[0...nparm], right[0...nparm] 
       Îã:
                  . -- k (= avail-1)
                 / \
-   left[k] --  .   \ 
+   left[k] --  .   \
               /\    \
              a  b    c -- right[k]
              |   \
@@ -3111,7 +3121,7 @@ count_len() 
  len_cnt[16]  0.. 2^16°Ê¾å  17¥Ó¥Ã¥È°Ê¾å
  len_cnt[15]  0.. 2^15      16¥Ó¥Ã¥È
  len_cnt[14]  0.. 2^14      15¥Ó¥Ã¥È
-     :                  
+     :
  len_cnt[ 3]  0.. 2^3        4 ¥Ó¥Ã¥È
  len_cnt[ 2]  0.. 2^2        3 ¥Ó¥Ã¥È
  len_cnt[ 1]  0.. 2^1        2 ¥Ó¥Ã¥È
@@ -3334,7 +3344,7 @@ make_code(n, len, code)
 # ¸å¤Çµ¤¤¬¤Ä¤¤¤¿¤³¤È¤À¤¬¡¢¤¢¤é¤«¤¸¤áÀßÄꤷ¤Æ¤¤¤¿ codeparm[] ¤ÎÆâÍƤϤ³
 # ¤³¤Ç¤Ï»ÈÍѤµ¤ì¤Ê¤¤¡£¤Ä¤Þ¤ê¡¢codeparm[] ¤ÏÀèÄø¤Ï¥ï¡¼¥¯ÍѤΥХåե¡¤È
 # ¤·¤ÆÍøÍѤµ¤ì¤Æ¤¤¤¿¤¬¡¢¤³¤³¤Ç¤Î codeparm[] ¤Ï½èÍý·ë²Ì¤òɽ¤¹¤È¤¤¤¦Æó¤Ä
-# ¤ÎÌò³ä¤¬¤¢¤ë
+# ¤ÎÌò³ä¤¬¤¢¤ë¡£¤³¤ì¤Ï¡¢Îΰè¤òÀáÌ󤹤뤿¤á¤ÎÊÑ¿ô¤Î»È¤¤²ó¤·¤À¡£
 
 ºÇ½é¤Î for ʸ¤Ç¤Ï¡¢ÊÑ¿ô i ¤ËÂФ·¤Æ¡¢weight[i] ¤¬²¼¤Î¤è¤¦¤ËÀßÄꤵ¤ì¤ë
 
@@ -3345,7 +3355,7 @@ make_code(n, len, code)
   start[1] = 0
   start[n] = start[n-1] + weight[n-1] * len_cnt[n-1]   (n > 1)
 
-¤È¤¤¤¦Á²²½¼°¤À¡£starr[] ¤Îź»ú i ¤Ï¡¢len_cnt[i](¿¼¤µ i ¤ÎÍդοô)¤Îź»ú
+¤È¤¤¤¦Á²²½¼°¤À¡£start[] ¤Îź»ú i ¤Ï¡¢len_cnt[i](¿¼¤µ i ¤ÎÍդοô)¤Îź»ú
 ¤Ç¤â¤¢¤ë¤³¤È¤«¤é¡¢¥Ï¥Õ¥Þ¥óÌڤο¼¤µ¤òɽ¤·¤Æ¤¤¤ë¡£start ¤¬¼ÂºÝ¤Ë¤É¤Î¤è¤¦
 ¤ÊÃͤò¼è¤ë¤«¤È¸À¤¦¤È¡¢Î㤨¤Ð len_cnt[i] ¤Î³ÆÍ×ÁǤ¬ Li ¤Ç¤¢¤Ã¤¿¾ì¹ç¡¢
 
@@ -3470,7 +3480,7 @@ codeparm[c] 
         } while (--cum);
     }
 
-¿¼¤µ n ¤ÎÍդοô¤ò 1 ¤Ä¸º¤é¤·¤Æ¡¢¤½¤Î²¼¤ÎÍդοô¤ò 2 ­¤·¤Æ¤¤¤ë¡£
+¿¼¤µ i ¤ÎÍդοô¤ò 1 ¤Ä¸º¤é¤·¤Æ¡¢¤½¤Î²¼¤ÎÍդοô¤ò 2 ­¤·¤Æ¤¤¤ë¡£
 ¤³¤ì¤¬¡¢cum ¤Î¿ô¤À¤±·«¤êÊÖ¤µ¤ì¤ë¡£Î㤨¤Ð¡¢Á°¤Ë¤â½Ð¤¿
 
                                                      :
@@ -3576,8 +3586,8 @@ c_freq[] 
 ¤È¤¤¤¦´Ø·¸¤Î¤è¤¦¤À¡£¤É¤¦¤ä¤é c_code¡¢pt_code ¤È¤¤¤¦ 2 ¼ïÎà¤Î
 Huffman Éä¹æɽ¤ò»ÈÍѤ¹¤ë¤é¤·¤¤¡£
 
-# ¤¢¤È¤Ç¤ï¤«¤ë¤³¤È¤À¤¬¼ÂºÝ¤Ï3¼ïÎà¤ÎHuffmanÉä¹æɽ¤òºî¤Ã¤Æ¤ª¤ê
-# pt_code¤ÏÊÑ¿ô¤¬»È¤¤²ó¤·¤µ¤ì¤Æ¤¤¤ë¡£ÊÑ¿ô¤Î»ÈÍÑÎΰè¤ò¸º¤é¤·
+# ¤¢¤È¤Ç¤ï¤«¤ë¤³¤È¤À¤¬¼ÂºÝ¤Ï 3 ¼ïÎà¤Î Huffman Éä¹æɽ¤òºî¤Ã¤Æ¤ª¤ê
+# pt_code ¤ÏÊÑ¿ô¤¬»È¤¤²ó¤·¤µ¤ì¤Æ¤¤¤ë¡£ÊÑ¿ô¤Î»ÈÍÑÎΰè¤ò¸º¤é¤·
 # ¤¿¤«¤Ã¤¿¤Î¤À¤í¤¦¡£
 
 ¤½¤Î¾¤ÎÊÑ¿ô¤Ë´Ø¤·¤Æ¤âͽÁÛ¤òΩ¤Æ¤¿¤¤½ê¤À¤¬¡¢¤â¤¦¤¯¤¸¤±¤¿¤Î¤Ç¡¢½èÍýÆâÍÆ
@@ -3857,9 +3867,10 @@ buf     | 40 | c1 | c2 |len |   off   | c4 |len |   off   | c6 | c7 | c8 |
 ----------------------------------------------------------------------------
 
 ¤³¤Î¤è¤¦¤Ê¾õÂ֤ˤʤ俤Ȥ­¤È¤¤¤¦¤³¤È¤À¡£¤µ¤é¤Ë¡¢buf[cpos] ¤Ë¤Ï¡¢
-<len,off> ¤¬³ÊǼ¤µ¤ì¤Æ¤¤¤ë°ÌÃÖ¤òɽ¤·¤Æ¤¤¤ë¡£¤³¤Î¾õÂÖ¤ò 1 ¥Ö¥í¥Ã¥¯¤È¤·
-¤Æ¤³¤Î¥Ö¥í¥Ã¥¯Ã±°Ì¤Ë¾ðÊó¤¬ buf ¤Ë³ÊǼ¤µ¤ì¡¢buf ¤¬¤¤¤Ã¤Ñ¤¤¤Ë¤Ê¤Ã¤¿¤é 
-(A) ¤Î½èÍý¤Î̵»ë¤·¤¿if ʸ¤ÎÃæ¿È¤Ç
+<len,off> ¤¬³ÊǼ¤µ¤ì¤Æ¤¤¤ë°ÌÃÖ¤òɽ¤·¤Æ¤¤¤ë¡£¤³¤Î¾õÂÖ¤ò 1 ¥»¥°¥á¥ó¥È¤È¸Æ
+¤Ö¤³¤È¤Ë¤·¤è¤¦¡£¤½¤·¤Æ¤³¤Î¥»¥°¥á¥ó¥Èñ°Ì¤Ë¾ðÊó¤¬ buf ¤Ë³ÊǼ¤µ¤ì¡¢buf ¤¬
+¤¤¤Ã¤Ñ¤¤¤Ë¤Ê¤Ã¤¿¤é¤³¤Î¥»¥°¥á¥ó¥È¤Î½¸¤Þ¤ê¤ò 1 ¥Ö¥í¥Ã¥¯¤È¤·¤Æ (A) ¤Î½èÍý
+¤Î̵»ë¤·¤¿if ʸ¤ÎÃæ¿È¤Ç
 
         if (output_pos >= bufsiz - 3 * CHAR_BIT) {
             send_block();
@@ -3875,20 +3886,24 @@ buf     | 40 | c1 | c2 |len |   off   | c4 |len |   off   | c6 | c7 | c8 |
 ¤·¤Æ¤â¥Ð¥Ã¥Õ¥¡¤ò¤Á¤ç¤Ã¤È¤À¤±ÌµÂ̤ˤ·¤Æ¤¤¤ë¤À¤±¤Ê¤Î¤ÇÂ礷¤¿¤³¤È¤Ï¤Ê¤¤¤Î
 ¤À¤í¤¦)
 
-# ¤É¤¦¤ä¤é¥Ð¥°¤Ç¤Ï¤Ê¤¤¤é¤·¤¤¡£3 * CHAR_BIT ¤È¤¤¤¦¤Î¤Ï¡¢1¥Ö¥í¥Ã¥¯¤¬
-# CHAR_BIT ¤Î¥¹¥í¥Ã¥È(8 ¤Ä¤Î¥¹¥í¥Ã¥È)¤ò»ý¤Á¡¢1 ¥Ö¥í¥Ã¥¯¤¬¤¹¤Ù¤Æ
-# <len,off> (3 bytes)¤Î¾ì¹ç¡¢ºÇÂç 3 bytes * 8 ¤È¤Ê¤ë¤³¤È¤ò¼¨¤·¤Æ¤¤¤ë¤è
-# ¤¦¤À¡£
+# ¤É¤¦¤ä¤é¥Ð¥°¤Ç¤Ï¤Ê¤¤¤é¤·¤¤¡£3 * CHAR_BIT ¤È¤¤¤¦¤Î¤Ï¡¢1 ¥»¥°¥á¥ó¥È¤¬
+# CHAR_BIT ¤Î¥¹¥í¥Ã¥È(8 ¤Ä¤Î¥¹¥í¥Ã¥È)¤ò»ý¤Á¡¢1 ¥»¥°¥á¥ó¥ÈÆâ¤Î¥¹¥í¥Ã¥È¤¬
+# ¤¹¤Ù¤Æ <len,off> (3 bytes)¤Î¾ì¹ç¡¢ºÇÂç 3 bytes * 8 ¤È¤Ê¤ë¤³¤È¤ò¼¨¤·¤Æ
+# ¤¤¤ë¤è¤¦¤À¡£
 # CHAR_BIT ¤Ï¡¢buf[cpos] ¤Î¥Ó¥Ã¥È¿ô¤òɽ¤·¤Æ¤¤¤ë¡£
 #
-# ¼ÂºÝ¤Î¤È¤³¤í1¥Ö¥í¥Ã¥¯¤Ï¡¢buf[cpos]¤Î1 byte¤¬ÀèƬ¤ËɬÍפʤΤǺÇÂ祵¥¤¥º¤Ï
+# ¼ÂºÝ¤Î¤È¤³¤í 1 ¥»¥°¥á¥ó¥È¤Ï¡¢buf[cpos] ¤ÎÎΰè 1 byte ¤¬ÀèƬ¤ËɬÍפʤÎ
+# ¤ÇºÇÂ祵¥¤¥º¤Ï
 #       3 * CHAR_BIT + 1
 # ¤È¤Ê¤ë¡£¤½¤¦¤¤¤¦°ÕÌ£¤Ç¤Ï¡¢
-#       if (output_pos > bufsiz - (3 * CHAR_BIT + 1)) {
+#       if (buf ¤Î»Ä¤ê¥µ¥¤¥º < ºÇÂ祵¥¤¥º) {
+# ¤È¤¤¤¦·Á¼°¡£¤Ä¤Þ¤ê¡¢
+#       if (bufsiz - output_pos < 3 * CHAR_BIT + 1) {
 # ¤ÎÊý¤¬¤ï¤«¤ê¤ä¤¹¤¤¤è¤¦¤Ë»×¤¦¡£
 
-output_pos = 0 ¤È¤·¤Æ¤¤¤ë¤³¤È¤«¤é¤³¤Î»þÅÀ¤Î buf ¤ÎÃæ¿È¤¬¤¹¤Ù¤Æ 
-send_block() ¤Ç°µ½Ì¤µ¤ì¥Õ¥¡¥¤¥ë¤Ë½ÐÎϤµ¤ì¤ë¤À¤í¤¦¤³¤È¤¬ÁÛÁü¤Ç¤­¤ë¡£
+output_pos = 0 ¤È¤·¤Æ¤¤¤ë¤³¤È¤«¤é¤³¤Î»þÅÀ¤Î buf ¤ÎÃæ¿È(¥»¥°¥á¥ó¥È¤Î½¸¤Þ
+¤ê=1 ¥Ö¥í¥Ã¥¯)¤¬¤¹¤Ù¤Æ send_block() ¤Ç°µ½Ì¤µ¤ì¥Õ¥¡¥¤¥ë¤Ë½ÐÎϤµ¤ì¤ë¤À¤í
+¤¦¤³¤È¤¬ÁÛÁü¤Ç¤­¤ë¡£
 
 ¤³¤Î 1 ¥Ö¥í¥Ã¥¯¤ËËþ¤¿¤Ê¤¤¾õÂ֤ǥե¡¥¤¥ë¤Î½ª¤ê¤¬Í褿¾ì¹ç¡¢¸å½èÍý 
 encode_end_st1() ¤Ç send_block() ¤¬¸Æ¤Ð¤ì¤ë¤Ç¤¢¤í¤¦¤³¤È¤âÁÛÁü¤Ç¤­¤ë¡£
@@ -3984,7 +3999,7 @@ make_tree() 
 
 ----------------------------------------------------------------------------
 
-      16bit  
+      16bit
    |---------|
    +----+----+
    |  size   |
@@ -4020,7 +4035,7 @@ root 
         return heap[1];
     }
 
-¤È¤¤¤¦Îã³°¾ò·ï¤¬¤¢¤Ã¤¿¡£¤³¤ì¤Ï¡¢°µ½Ì¤¹¤ëʸ»ú¤¬¤Ê¤¤¡¢¤¢¤ë¤¤¤Ï1¼ïÎष¤«
+¤È¤¤¤¦Îã³°¾ò·ï¤¬¤¢¤Ã¤¿¡£¤³¤ì¤Ï¡¢°µ½Ì¤¹¤ëʸ»ú¤¬¤Ê¤¤¡¢¤¢¤ë¤¤¤Ï 1 ¼ïÎष¤«
 ¤Ê¤¤¾ì¹ç¤Î½èÍý¤À¡£°µ½Ì¤¹¤ëʸ»ú¤¬¤Ê¤¤¾ì¹ç¤Ë send_block() ¤¬¸Æ¤Ð¤ì¤ë¤³¤È
 ¤Ï¤Ê¤¤¤À¤í¤¦¤«¤é¡¢(B) ¤Î½èÍý¤Î else ¤Ï 1 ¥Ö¥í¥Ã¥¯Ãæ¤Ë°µ½Ì¤¹¤ëʸ»ú¤¬ 1 
 ¼ïÎष¤«¤Ê¤¤¾ì¹ç¤Î½èÍý¤Ç¤¢¤ë(¤³¤Î 1 ¼ïÎà¤Îʸ»ú¤È¤Ï¡¢make_tree() ¤ÎÌá¤ê
@@ -4036,9 +4051,9 @@ root 
 
 ----------------------------------------------------------------------------
 
-¤³¤ì¤¬¡¢1¥Ö¥í¥Ã¥¯¤Ë1¼ïÎष¤«Ê¸»ú¤¬¤Ê¤¤¾ì¹ç¤Î½ÐÎϤÀ(off¤Î¾ðÊó¤Ï¤Þ¤À´Þ¤Þ
-¤Ê¤¤)¡£(B)¤Î if ¤¬¿¿¤Î¤È¤­¤¬¤É¤¦¤Ê¤ë¤«¤ÏÊ£»¨¤½¤¦¤Ê¤Î¤Ç¸å¤Ç¸«¤ë¤³¤È¤Ë¤·
-¤è¤¦¡£
+¤³¤ì¤¬¡¢1 ¥Ö¥í¥Ã¥¯¤Ë 1 ¼ïÎष¤«Ê¸»ú¤¬¤Ê¤¤¾ì¹ç¤Î½ÐÎϤÀ(off ¤Î¾ðÊó¤Ï¤Þ¤À
+´Þ¤Þ¤Ê¤¤)¡£(B)¤Î if ¤¬¿¿¤Î¤È¤­¤¬¤É¤¦¤Ê¤ë¤«¤ÏÊ£»¨¤½¤¦¤Ê¤Î¤Ç¸å¤Ç¸«¤ë¤³¤È
+¤Ë¤·¤è¤¦¡£
 
 ³¤¤¤Æ (C)
 
@@ -4115,7 +4130,7 @@ flags 
         } else
             encode_c(buf[pos++]);
 
-flags ¤Î7¥Ó¥Ã¥ÈÌÜ(127)¤¬Î©¤Ã¤Æ¤¤¤ë¤È¤­ buf[pos] ¤Ï¡¢<len, off> ¤ò»Ø¤·¡¢
+flags ¤Î 7 ¥Ó¥Ã¥ÈÌÜ(128)¤¬Î©¤Ã¤Æ¤¤¤ë¤È¤­ buf[pos] ¤Ï¡¢<len, off> ¤ò»Ø¤·¡¢
 
   encode_c(len + 256)
   encode_p(off)
@@ -4198,6 +4213,48 @@ off  |0000 0000 0100 0000|
     for (i = 0; i < np; i++)
         p_freq[i] = 0;
 
+¤³¤³¤Ç¡¢ÉÑÅÙɽ¤ò¥¯¥ê¥¢¤·¤Æ¤¤¤ë¤È¤¤¤¦¤³¤È¤Ïʸ»ú¤ä°ÌÃ֤νи½²ó¿ô¤Ï 1 ¥Ö¥í¥Ã¥¯
+ñ°Ì¤Ç¤·¤«·×¾å¤·¤Ê¤¤¤³¤È¤òɽ¤¹¡£
+
+# °ìÊý¡¢c_freq ¤ä p_freq ¤Ï unsigned short ¤Ç¤¢¤ë¤«¤é(16 bit ¤À¤È¤·
+# ¤Æ)65535 ¤Þ¤Ç¤·¤«¿ô¤¨¤é¤ì¤Ê¤¤¡£¤µ¤é¤Ë¡¢{c,p}_freq ¤Ë¤Ï Huffman Ìڤι½
+# ÃۤβáÄø¤Ç½Ð¸½²ó¿ô¤ÎÁíϤ¬¥»¥Ã¥È¤µ¤ì¤ë¾ì¹ç¤¬¤¢¤ë¤³¤È¤«¤é 1 ¥Ö¥í¥Ã¥¯¤Ë
+# ¤Ï 65535 ʸ»ú + 65535 ¸Ä¤Î°ÌÃ֤ޤǤ·¤«³ÊǼ¤Ç¤­¤Ê¤¤¡£
+# ¤¤¤ä¡¢°ÌÃÖ¤Ïɬ¤ºÄ¹¤µ¤È¥»¥Ã¥È¤Ç¤¢¤ë¤³¤È¤«¤é¡£°ÌÃ֤νи½²ó¿ô¤Ïʸ»ú¤Î½Ð
+# ¸½²ó¿ô(¤³¤ì¤ÏŤµ¤Î½Ð¸½²ó¿ô¤ò´Þ¤à)¤Ë´Þ¤Þ¤ì¤ë¤¿¤á 65535 ¥¹¥í¥Ã¥È¤Þ¤Ç¤·
+# ¤« buf ¤ò»ý¤Æ¤Ê¤¤¤³¤È¤Ë¤Ê¤ë¡£¤³¤ì¤Ï blocksize (16 bit)¤È¤â°ìÃפ¹¤ë¡£
+#
+# buf ¤ÎÎΰè³ÎÊݤϰʲ¼¤Î¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤¿¡£
+#
+#    unsigned char  *
+#    alloc_buf( /* void */ )
+#    {
+#       bufsiz = 16 * 1024 *2;  /* 65408U; */ /* t.okamoto */
+#       while ((buf = (unsigned char *) malloc(bufsiz)) == NULL) {
+#           bufsiz = (bufsiz / 10) * 9;
+#           if (bufsiz < 4 * 1024)
+#               break;
+#       }
+#       return buf;
+#    }
+#
+# ¤³¤ì¤«¤é¡¢bufsiz ¤Ï¡¢16 * 1024 *2 = 2^4 * 2^10 * 2 = 2^15 ¤Ç¤¢¤ë¡£
+# 1 ¥»¥°¥á¥ó¥È¤ÎºÇ¾®¥µ¥¤¥º¤¬¥Ð¥¤¥È¿ô¤Ç(1*CHAR_BIT+1)¤Ç¤¢¤ë¤«¤é
+# ¤³¤ÎÎΰè¤Ë³ÊǼ¤Ç¤­¤ëºÇÂ祻¥°¥á¥ó¥È¿ô¤Ï¡¢
+#   2^15 / (1*CHAR_BIT+1)
+# ¤Ç¤¢¤ê¡¢1 ¥»¥°¥á¥ó¥È¤Ï 8 ¥¹¥í¥Ã¥È¤¢¤ë¤«¤é¡¢ºÇÂ祹¥í¥Ã¥È¿ô¤Ï
+#     8 * 2^15 / (1*CHAR_BIT+1)
+#   = 2^18 / 9
+#   = 29127.1111111111
+# ¤È¤Ê¤ë¡£¤³¤ì¤Ï¡¢ÉÑÅÙɽ¤Î¾å¸Â(¥¹¥í¥Ã¥È¿ô¤Î¾å¸Â)
+#   65535=2^16-1
+# ¤è¤ê¤â¾®¤µ¤¤¤Î¤ÇÌäÂê¤Ï¤Ê¤¤¤³¤È¤Ë¤Ê¤ë¡£
+#
+# ¤Ê¤ª¡¢1 ¥Ö¥í¥Ã¥¯¤Î¥µ¥¤¥º¤Ï¤³¤Î¥Ð¥Ã¥Õ¥¡¥µ¥¤¥º¤Ë¤è¤ê·è¤Þ¤ë¤ï¤±¤À¤¬ 1 ¥Ö
+# ¥í¥Ã¥¯¤Î¥µ¥¤¥º¤¬Â礭¤±¤ì¤ÐÂ礭¤¤¤Û¤É¤è¤¤¤È¤¤¤¦¤ï¤±¤Ç¤Ï¤Ê¤¤¡£¤à¤·¤í¡¢
+# ʸ»ú¤Î½Ð¸½³ÎΨ¤ÎÊÑÆ°¤ËÄɿ魯¤ë¤¿¤á¤Ë¤Ï¾®¤µ¤¤Êý¤¬¤è¤¤¤Î¤À¤¬¤½¤¦¤¹¤ë¤È
+# Huffman ÌڤγÊǼ²ó¿ô¤¬Áý¤¨¤ë¤Î¤Ç´Êñ¤Ë¤ÏºÇŬÃͤϷè¤Þ¤é¤Ê¤¤¡£
+
 °Ê¾å¤Ç¡¢°µ½Ì½èÍýÁ´ÂΤγµÍפ¬¤ï¤«¤Ã¤¿¡£¸å¤Ï̵»ë¤·¤Æ¤¤¤¿ Huffman ɽ¤ò½Ð
 ÎϤ¹¤ë²Õ½ê¤À¤±¤À¡£
 
@@ -4290,7 +4347,7 @@ count 
 
   c_len[i]    count     t_freq[]
   -------------------------------------------
-     0        0 .. 2    t_freq[0] += count
+     0        1 .. 2    t_freq[0] += count
      0        3 ..18    t_freq[1]++
      0        19        t_freq[0]++, t_freq[1]++
      0        20°Ê¾å    t_freq[2]++
@@ -4341,12 +4398,12 @@ pt_len[] 
 ¤Ð¡¢bit ¿ô¤Çɽ¸½¤¹¤ë¤é¤·¤¤¡£Î㤨¤Ð pt_len[i] == 7 ¤Ê¤é¡¢1110 ¤È¤Ê¤ë¡£
 ºÇ½é¤Î 3 bit ¤Ïɬ¤º 1 ¤Ë¤Ê¤ê¡¢ºÇ½é¤Î·Á¼°¤È¶èÊ̤¬¤Ä¤¯¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¡£
 
-¤µ¤é¤Ë¡¢i_special ÈÖÌܤΠpt_len[i] ¤ò½ÐÎϸå¤Ï¡¢i_special ... 6 ¤ÎÈÏ°Ï
-¤Ç pt_len[i] == 0 ¤¬Â³¤¯¤³¤È¤ò 2 bit ¤Ç¡¢É½¸½¤·¤Æ¤¤¤ë¡£i_special ¤Ï
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+write_pt_len() ¤Î 3 ÈÖÌܤΰú¿ô¤Ç¡¢º£²ó¤Î¾ì¹ç¤Ï 3 ¤À¡£Î㤨¤Ð
+pt_len[3..5] ¤¬¤¹¤Ù¤Æ 0 ¤Ê¤é pt_len[3..5] ¤ò½ÐÎϤ»¤º¤Ë¡¢i - 3 (= 3) ¤ò
+2 bit ½ÐÎϤ¹¤ë¡£¤Ä¤Þ¤ê¡¢11 ¤¬½ÐÎϤµ¤ì¤ë¡£¤³¤Î¤è¤¦¤Ê¤³¤È¤ò¤·¤Æ¤¤¤ë°ÕÌ£¤Ï
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@@ -4370,12 +4427,14 @@ pt_len[i] >= 7 
     pt_len[i] |1 1 1 1 ... 1 0 |
               +----------------+
 
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+pt_len[i_special-1] ¤Îľ¸å¤Ï 2 bit ¤Î¾ðÊó¤¬Éղ䵤ì¤ë¡£¤³¤ÎÃͤò x ¤È¤¹¤ë
+¤È¡¢pt_len[i_special .. x + 2] ¤ÎÈÏ°Ï¤Ç 0 ¤¬Â³¤¯¤³¤È¤ò°ÕÌ£¤¹¤ë¡£x ¤¬ 0
+¤Ê¤é pt_len[i_special] ¤Ï 0 ¤Ç¤Ï¤Ê¤¤¡£
 
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-ºÇ¸å¤Ë¡¢write_c_len() ¤Ç¡¢Éä¹æɽ c_len[] ¤È pt_code[] ¤ò½ÐÎϤ¹¤ë¡£
+ºÇ¸å¤Ë¡¢write_c_len() ¤Ç¡¢Huffman Éä¹æ¤Î¥Ó¥Ã¥ÈĹ c_len[] (¤Î Huffman Éä
+¹æɽ pt_code[]) ¤ò½ÐÎϤ¹¤ë¡£
 
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@@ -4433,10 +4492,10 @@ c_len[i] == 0 
 
  0 ¤¬Â³¤¯¿ô¤ò count ¤È¤¹¤ë¤È¡¢
 
- count == 0..2 ¤Î¾ì¹ç
+ count == 1..2 ¤Î¾ì¹ç
 
-                pt_len[0]  
-              <----------> 
+                pt_len[0]
+              <---------->
              +------------+
              | pt_code[0] |
              +------------+
@@ -4480,6 +4539,11 @@ c_len[i] != 0 
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+# ¾¯¤·ÊѤʤ³¤È¤ò½ñ¤¤¤Æ¤¤¤ë¡£pt_code[] ¤Î½ÐÎϤϡ¢c_len[] ¤Î Huffman Éä¹æ
+# ¤ò½ÐÎϤ·¤Æ¤¤¤ë¤Î¤Ç¤¢¤ê¡¢Huffman ÌڤξðÊó¤È¤·¤Æ½ÐÎϤ·¤Æ¤¤¤ë¤ï¤±¤Ç¤Ï¤Ê
+# ¤¤¡£¤Ä¤Þ¤ê¡¢c_code[] ¤¬½ÐÎϤµ¤ì¤Æ¤¤¤Ê¤¤¤Î¤ÈƱÍÍ¤Ë pt_code[] ¤â½ÐÎϤÏ
+# ¤·¤Æ¤¤¤Ê¤¤¡£
+
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@@ -4487,13 +4551,13 @@ c_len[i] != 0 
 
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@@ -4620,9 +4684,8 @@ blocksize == 0 
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+¸å¤Ï¸å³¤Î½èÍý¤Ç blocksize ʬÆɤ߹þ¤à¤Þ¤Ç decode ¤ò¹Ô¤¦¤À¤±¤À¡£
 
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@@ -4860,9 +4923,14 @@ read_c_len( /* void */ )
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+         <--> (16 - tablebits{12}) = 4 bit ¥·¥Õ¥È
 
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@@ -5065,14 +5134,16 @@ bit 
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-  unsigned short c_table[65535+1]; (unsigned short > NC-1)
+  unsigned short c_table[65535+1]; (unsigned short >= NC-1)
 
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@@ -5108,7 +5179,7 @@ Huffman
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            / \                     |
-          x   y      ... ³¬ÁØ:12  .' <- ɽ°ú¤­¤Î·ë²Ì x ¤¬(>=NC)¤Î¾ì¹ç¡¢
+          x   y      ... ³¬ÁØ:12  .' <- ɽ°ú¤­¤Î·ë²Ì y ¤¬(>=NC)¤Î¾ì¹ç¡¢
              / \                        Ìڤγ¤­¤¬¤¢¤ë¤³¤È¤ò¼¨¤¹
             z   .    ... ³¬ÁØ:13  `.
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@@ -5116,15 +5187,15 @@ Huffman
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+# right ¤Ï¥¨¥ó¥³¡¼¥É½èÍý¤Ç¥Ï¥Õ¥Þ¥óÌÚ¤òºî¤ëºÝ¤Ë»ÈÍѤ·¤¿ÊÑ¿ô¤òήÍѤ·¤Æ¤¤
+# ¤ë¤¿¤áÎΰ褬­¤ê¤Ê¤¤¤È¤¤¤¦¤³¤È¤Ï¤Ê¤¤¡£
+#
+# ɽ°ú¤­¤ò¹Ô¤ï¤º¤Ë Huffman ÌÚ¤ò´°Á´¤ËÆɤ߹þ¤à¤³¤È¤ò¹Í¤¨¤ë¤È¡¢left,
+# right ¤Ï¡¢c_len ¤Ë¤Ä¤¤¤Æ¤Ï¡¢
+#   NC ... 2*NC-1
+# ¤¬»ÈÍѤµ¤ì¡¢°ÌÃÖ(p_len)¤ËÂФ¹¤ë Huffman Ìڤι½ÃÛ»þ¤Ë¤Ï
+#   np ... 2*np-1
+# ¤ÎÈϰϤ¬»ÈÍѤµ¤ì¤ë¡£
+#
+# c_len, p_len ¤Î Huffman ÌÚ¤ÏƱ»þ¤Ë¸ºß¤¹¤ë¤Î¤Ç¡¢left, right ¤È¤â¤Ë
+# ²¼¿Þ¤ÎÎΰ褬Ʊ»þ¤Ë»ÈÍѤµ¤ì¤ë¤³¤È¤Ë¤Ê¤ë¡£
+# (t_len ¤Ï c_len ¤ÎÆɤ߹þ¤ß¤¬´°Î»¤·¤¿»þÅÀ¤ÇÉÔÍפȤʤ뤿¤á¡¢¤³¤Î¿Þ¤Ë¤Ï
+# ɽ¤·¤Æ¤¤¤Ê¤¤)
+#
+#   0         np     2*np-1      NC                            2*NC-1
+#   +---------+-------+----------+------------------------------+
+#   |̤»ÈÍÑ°è |»ÈÍÑ°è | ̤»ÈÍÑ°è | »ÈÍÑ°è                       |
+#   +---------+-------+----------+------------------------------+
+#
+#                                                         np: 14¡Á17
+#                                                         NC: 510
+#
+# ¥½¡¼¥¹¤ò¸«¤Æ¤ß¤Æ¤â¡¢¤³¤Î¤³¤È¤Ï¤Ê¤«¤Ê¤«µ¤¤¬¤Ä¤­¤Ë¤¯¤¤¡£¤ä¤Ï¤ê¡¢left,
+# right ¤Ï³Æ Huffman Éä¹æÍѤËÎΰè¤ò³ä¤êÅö¤Æ¤¿Êý¤¬¤ï¤«¤ê¤ä¤¹¤¤¤À¤í¤¦¡£
 
 ³¤­¤ò¸«¤Æ¤¤¤³¤¦¡¢(E) ¤Î½èÍý
 
@@ -5170,11 +5284,15 @@ k 
 ¤½¤·¤Æ¡¢start[j...k] ¤ÎÈϰϤˤĤ¤¤Æ 0 ¤òÀßÄꤷ¤Æ¤¤¤ë¡£·ë¶É tablebits ¤Î
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+³ä¤êÅö¤Æ¤é¤ì¤ë¤³¤È¤¬¤Ê¤¤ Huffman Éä¹æ¤È¤¤¤¦¤³¤È¤Ï 0 ¤Ç½é´ü²½¤·¤Æ¤¤¤ë¤Î
+¤Ï¤³¤Î¸å¤Î½èÍý¤ÇÌڤΥΡ¼¥É¤Ë¤Ê¤ëͽÄê¤ÎÎΰè¤À¤È»×¤ï¤ì¤ë¡£
 
 ¤Á¤ç¤Ã¤Èµ¿Ìä¤Ê¤Î¤À¤¬¡¢if (j != 0) ¤ÏɬÍפʤΤÀ¤í¤¦¤«¡©¤Ä¤Þ¤ê¡¢j = 0 ¤È
 ¤·¤Æ¡¢table[] ¤ÎÁ´Í×ÁǤˤĤ¤¤Æ 0 ¤Ç½é´ü²½¤·¤Æ¤â²¿¤âÌäÂê¤Ï¤Ê¤¤¤Î¤Ç¤Ï¤Ê¤¤
 ¤«¡©¤½¤·¤Æ¤½¤ì¤Ê¤é make_table() ¤Ë table[] ¤Î¥µ¥¤¥º(sizeof)¤òÅϤ·
-memset() ¤Ë¤Æ 0 ¤Ç½é´ü²½¤·¤¿Êý¤¬Â®¤¤¤Î¤Ç¤Ï¤Ê¤¤¤À¤í¤¦¤«¡©
+memset() ¤Ë¤Æ 0 ¤Ç½é´ü²½¤·¤¿Êý¤¬(µ¡³£¸ì¤ÎÌ¿Îá¿ô¤¬¾¯¤Ê¤¯¤Ê¤ë¤Î¤Ç)®¤¤¤Î
+¤Ç¤Ï¤Ê¤¤¤À¤í¤¦¤«¡©¤Þ¤¢¡¢Â®¤µ¤ÏÎɤ¤¤È¤·¤Æ¤â memset() ¤ÎÊý¤¬¤è¤ê¤ï¤«¤ê¤ä
+¤¹¤¤¤È»×¤¦¡£
 
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@@ -5224,7 +5342,7 @@ memset() 
 
     i: Huffman Éä¹æ
     j: Éü¹æʸ»ú
-    k: j ¤ÎHuffman code¤Ç¤Î¥Ó¥Ã¥ÈĹ
+    k: j ¤Î Huffman Éä¹æ¤Î¥Ó¥Ã¥ÈĹ(i ¤Î¥Ó¥Ã¥ÈĹ)
     l: ¥Ó¥Ã¥ÈĹ k ¤ËÂФ¹¤ëHuffman Éä¹æ¤Î½ªÃÍ (start[k] <= Huffman(k) < l)
     m: Huffman Éä¹æɽ¤òshift¤¹¤ë¥Ó¥Ã¥È¿ô
     n: ??
@@ -5244,14 +5362,14 @@ memset() 
         start[k] = l;
     }
 
-Éü¹æʸ»ú j = 0 ... nchar ¤ò¥ë¡¼¥×¤·¤Æ¤¤¤ë(j ¤¬Ê£¹çʸ»ú¤Ç¤¢¤ë¤³¤È¤Ï¡¢
+Éü¹æʸ»ú j = 0 ... nchar ¤ò¥ë¡¼¥×¤·¤Æ¤¤¤ë(j ¤¬Éü¹æʸ»ú¤Ç¤¢¤ë¤³¤È¤Ï¡¢
 bitlen[] ¤Îź¤¨»ú¤Ç¤¢¤ë¤³¤È¤«¤é¤ï¤«¤ë)¡£
 
 ¤½¤·¤Æ¡¢k = bitlen[j] ¤¬ 0 ¤Ç¤¢¤ì¤Ð¡¢(Huffman Éä¹æ²½¤µ¤ì¤Æ¤¤¤Ê¤±¤ì¤Ð)¤½
 ¤Îʸ»ú¤Ï¥¹¥­¥Ã¥×¤·¤Æ¤¤¤ë¡£¤³¤³¤Ï¡¢Îɤ¤¤À¤í¤¦¡£
 
 (F.1), (F.2) ¤Ï¡¢HuffmanÉä¹æ²½¤µ¤ì¤Æ¤¤¤ëʸ»ú j ¤Ë¤Ä¤¤¤Æ
-¤Î½èÍý¤È¤Ê¤ë¡£(ºÇ¸å¤Îstart[k] = l ¤Ï¸å¤Ç¹Í¤¨¤è¤¦)
+¤Î½èÍý¤È¤Ê¤ë¡£(ºÇ¸å¤Î start[k] = l ¤Ï¸å¤Ç¹Í¤¨¤è¤¦)
 
 ½èÍý¤ÎÌÜŪ¤«¤éÂ绨ÇĤË
 
@@ -5271,24 +5389,23 @@ bitlen[] 
                 table[i] = j;
         }
 
-¥Ó¥Ã¥ÈĹ k <= tablebits ¤Î¾ì¹ç¡¢¥Ó¥Ã¥ÈĹ k ¤¬¼è¤ê¤¦¤ëÈϰϤÎHuffmanÉä¹æ
+¥Ó¥Ã¥ÈĹ k <= tablebits ¤Î¾ì¹ç¡¢¥Ó¥Ã¥ÈĹ k ¤¬¼è¤ê¤¦¤ëÈϰϤΠHuffman Éä¹æ
 ¤Ë¤Ä¤¤¤Æ¡¢Ê¸»ú j ¤ò³ä¤êÅö¤Æ¤Æ¤¤¤ë¡£
 ¥Ó¥Ã¥ÈĹ k ¤¬¼è¤ê¤¦¤ëÈϰϤΠHuffman Éä¹æ¤È¤Ï
 
     start[k] <= HuffmanÉä¹æ i < l
 
-¤Ç¤¢¤ë¡£Îã¤Ç¼¨¤¹¤È(´ÊÊز½¤Î¤¿¤á¤Ë¡¢ºÇÂç¤ÎHuffmanÉä¹æŤò2¤È¤¹¤ë)
+¤Ç¤¢¤ë¡£Îã¤Ç¼¨¤¹¤È(´ÊÊز½¤Î¤¿¤á¤Ë¡¢ºÇÂç¤Î Huffman Éä¹æŤò 2 ¤È¤¹¤ë)
 
        /\               a: 0
       a /\              b: 10
         b c             c: 11
 
-ʸ»úa¤Ï¡¢1¥Ó¥Ã¥È¤Ç¡¢00...10 ¤ÎÈÏ°Ï(¤Ä¤Þ¤ê¡¢00¤È01)
-ʸ»úb¤Ï¡¢2¥Ó¥Ã¥È¤Ç¡¢10...11 ¤ÎÈÏ°Ï(¤Ä¤Þ¤ê¡¢10)
-ʸ»úc¤Ï¡¢2¥Ó¥Ã¥È¤Ç¡¢11
+ʸ»ú a ¤Ï¡¢1 ¥Ó¥Ã¥È¤Ç¡¢00...10 ¤ÎÈÏ°Ï(¤Ä¤Þ¤ê¡¢00 ¤È 01)
+ʸ»ú b ¤Ï¡¢2 ¥Ó¥Ã¥È¤Ç¡¢10...11 ¤ÎÈÏ°Ï(¤Ä¤Þ¤ê¡¢10)
 
-¤È¤Ê¤ë¡£¤³¤³¤Ç¡¢Ê¸»ú c ¤Ë¤Ä¤¤¤Æ¤Ï¤³¤Î¥ë¡¼¥×¤Ç¤Ï¥Æ¡¼¥Ö¥ë¤ËÃͤ¬¥»¥Ã¥È¤µ¤ì
-¤Ê¤¤¤è¤¦¤Ë¸«¤¨¤ë¡£¼ÂºÝ¤Ï(F) ¤Î¥ë¡¼¥×¤ÎËöÈø¤Ë½Ð¤Æ¤­¤¿
+¤È¤Ê¤ë¡£¤³¤³¤Ç¡¢Ê¸»ú c ¤Ë¤Ä¤¤¤Æ¤Ïʸ»ú b ¤ÈƱ¤¸Éä¹æ¤¬³ä¤êÅö¤Æ¤é¤ì¤ë¤«¤Î¤è¤¦¤Ë
+¸«¤¨¤ë¤¬¡¢¼ÂºÝ¤Ï(F) ¤Î¥ë¡¼¥×¤ÎËöÈø¤Ë½Ð¤Æ¤­¤¿
 
         start[k] = l;
 
@@ -5333,29 +5450,47 @@ bitlen[] 
 tablebits ¤Ç¤¢¤ë¤«¤é start[k] ¤Ï m ¤Ç¥·¥Õ¥È¤µ¤ì¤Æ¤¤¤Ê¤¤ Huffman Éä¹æ¤È
 ¤Ê¤Ã¤Æ¤¤¤ë¡£
 
-p ¤Ï¡¢HuffmanÉä¹æ i ¤Î table ¾å¤Î°ÌÃÖ¤ò»Ø¤¹¡£¸å¤Ç¡¢*p ¤Ë¤ÏÌڤΥ롼¥È°ÌÃÖ
-¤òµ­Ï¿¤¹¤ë¤³¤È¤¬Í½ÁÛ¤µ¤ì¤ë¡£
+p ¤Ï¡¢HuffmanÉä¹æ i ¤Î table ¾å¤Î°ÌÃÖ¤ò»Ø¤¹¡£¸å¤Ç¡¢*p ¤Ë¤ÏÌڤΥ롼¥È°Ì
+ÃÖ¤òµ­Ï¿¤¹¤ë¤³¤È¤¬Í½ÁÛ¤µ¤ì¤ë¡£
 
 ¼¡¤Ë¡¢
 
     i <<= tablebits;
 
-i ¤ò tablebits ¤Çshift¤¹¤ë¤³¤È¤Ç¡¢Huffman Éä¹æ i ¤Ï
-ºÇ¾å°Ì¤Îtablebits ¤ò½ü¤¤¤¿»Ä¤ê¤Î¥Ó¥Ã¥ÈÉôʬ¤Ë¤Ê¤ë¡£
-
-                               k
-               tablebits
-              |-----------|----|
-              +-----------+----+
-    i         |           |    |
-              +-----------+----+
-                          |----|
-                           ¥³¥³
+i ¤ò tablebits ¤Ç¥·¥Õ¥È¤¹¤ë¤³¤È¤Ç¡¢Huffman Éä¹æ i ¤ÏºÇ¾å°Ì¤Î tablebits
+¤ò½ü¤¤¤¿»Ä¤ê¤Î¥Ó¥Ã¥ÈÉôʬ¤Ë¤Ê¤ë¡£¤³¤Î»Ä¤ê¤Î¥Ó¥Ã¥ÈÉôʬ¤òÌÚ¤Çɽ¤¹¡£
+
 ¼¡¤Ë
 
     n = k - tablebits;
 
-n ¤Ï¡¢½ñ¤­´¹¤¨¤¿ i ¤Î¥Ó¥Ã¥ÈŤò¼¨¤¹¡£ÌڤˤϿ¼¤µ n ¤Î³¬Áؤ¬ºîÀ®¤µ¤ì¤ë¤Î¤À¤í¤¦¡£
+n ¤Ï¡¢½ñ¤­´¹¤¨¤¿ i ¤Î¥Ó¥Ã¥ÈŤò¼¨¤¹¡£ÌڤˤϿ¼¤µ n ¤Î³¬Áؤ¬ºîÀ®¤µ¤ì¤ë¤Î
+¤À¤í¤¦¡£
+
+----------------------------------------------------------------------------
+                        k: Huffman Éä¹æ i ¤Î¥Ó¥Ã¥ÈĹ
+                |----------------|
+
+                 tablebits (ɽ°ú¤­¤ÇÉü¹æ¤¹¤ëÉôʬ)
+                |-----------|
+                +-----------+----+
+  Huffman Éä¹æ i|           |xxxx|
+                +-----------+----+
+                            |----|
+                              n: ÌÚ¤òé¤ë¤³¤È¤ÇÉü¹æ¤¹¤ëÉôʬ
+
+tablebits ¥Ó¥Ã¥È¥·¥Õ¥È¤Ë¤è¤ê¡¢½ñ¤­´¹¤¨¤¿ i ¤Ï¡¢xxxx ¤ÎÉôʬ¤¬ºÇ¾å°Ì¥Ó¥Ã
+¥È¤È¤Ê¤ë¡£
+
+                +----+-----------+
+  Huffman Éä¹æ i|xxxx|           |
+                +----+-----------+
+                |----|
+                  n: ÌÚ¤òé¤ë¤³¤È¤ÇÉü¹æ¤¹¤ëÉôʬ
+
+----------------------------------------------------------------------------
+
+¤½¤¦¤·¤Æ¡¢½ñ¤­´¹¤¨¤¿ i ¤Ë¤Ä¤¤¤Æ¡¢ÌÚ¤ò¹½ÃÛ¤¹¤ë¡£
 
             /* make tree (n length) */
             while (--n >= 0) {
@@ -5375,19 +5510,22 @@ n 
             *p = j;
 
 (F.2.1) *p ¤¬ 0 ¤Ç¤¢¤ì¤Ð¡¢*p ¤Ë avail ¤È¤·¤Æ¡¢¿·¤¿¤Êº¬¤ò³ä¤êÅö¤Æ¤½¤Î±¦
-¤Èº¸¤Î»Ò¤Ï0¤Ç½é´ü²½¤·¤Æ¤ª¤¯¡£
+¤Èº¸¤Î»Ò¤Ï 0 ¤Ç½é´ü²½¤·¤Æ¤ª¤¯¡£
+
+(F.2.2) Huffman Éä¹æ(¤Î tablebits °Ê¹ß¤Î¥Ó¥Ã¥È) i ¤Ë¤Ä¤¤¤ÆºÇ¾å°Ì¥Ó¥Ã¥È
+¤¬Î©¤Ã¤Æ¤¤¤ì¤Ð±¦¤Î»Ò right¡¢¥Ó¥Ã¥È¤¬Î©¤Ã¤Æ¤¤¤Ê¤±¤ì¤Ðº¸¤Î»Ò left ¤òºîÀ®
+(Îΰè¤ò p ¤ÇͽÌó)¤¹¤ë¡£
+
+¥ë¡¼¥×¤Ë¤è¤Ã¤Æ¥Ó¥Ã¥È¥Ñ¥¿¡¼¥ó¤Ë±è¤Ã¤Æ *p ¤Ë¤Ï¡¢avail++ ¤¬½ç¤Ë³ä¤êÅö¤Æ¤é¤ì¤ë¡£
+
+avail ¤Î½é´üÃÍ¤Ï nchar ¤Ê¤Î¤Ç¡¢*p >= nchar (c_table[] ¤Ê¤é NC)¤Ç¤¢¤ë¡£
 
-(F.2.2) Huffman Éä¹æ(¤Îtablebits°Ê¹ß¤Î¥Ó¥Ã¥È) i ¤Ë¤Ä¤¤¤Æ
-ºÇ¾å°Ì¥Ó¥Ã¥È¤¬Î©¤Ã¤Æ¤¤¤ì¤Ð±¦¤Î»Ò right¡¢¥Ó¥Ã¥È¤¬Î©¤Ã¤Æ¤¤¤Ê¤±¤ì¤Ð
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+¤³¤Î while ¥ë¡¼¥×¤òÈ´¤±¤¿¸å¤Ë(F.2.3)¤Ë¤Æ
 
-(F.2.3)
-*p ¤Ë¤Ï¡¢avail++ ¤¬½ç¤Ë³ä¤êÅö¤Æ¤é¤ì avail ¤Î½é´üÃÍ¤Ï nchar ¤Ê¤Î¤Ç¡¢
-*p >= nchar (c_table[] ¤Ê¤é NC)¤Ç¤¢¤ë¡£
-¤³¤Î while ¥ë¡¼¥×¤òÈ´¤±¤¿¸å¤Ë
     *p = j;
-¤¬ÀßÄꤵ¤ì¡¢ÌÚ¤ÎÍդˤϡ¢*p < nchar ¤Ç¤¢¤ëÃͤ¬ÀßÄꤵ¤ì¤Æ¤¤¤ë¡£
-(¤½¤·¤Æ¤³¤ì¤¬µá¤á¤ëÉü¹æʸ»ú¤Ç¤¢¤ë¡£)
+
+¤¬ÀßÄꤵ¤ì¡¢ÌÚ¤ÎÍդˤϡ¢*p < nchar ¤Ç¤¢¤ëÃͤ¬ÀßÄꤵ¤ì¤Æ¤¤¤ë¡£(¤½¤·¤Æ¤³
+¤ì¤¬µá¤á¤ëÉü¹æʸ»ú¤Ç¤¢¤ë¡£)
 
 (F.2.1) ¤Ç¡¢if (*p == 0) ¤È¤·¤Æ¤¤¤ëÍýͳ¤Ï¡¢
 
@@ -5403,8 +5541,1601 @@ n 
          .  <- p
         / \
 
-¤È±¦¤Î»Ò¤¬Äɲ䵤ì¤ë¾ì¹ç¤òÁÛÄꤷ¤Æ¤¤¤ë¡£
+¤È±¦¤Î»Ò¤¬Äɲ䵤ì¤ë¾ì¹ç¤òÁÛÄꤷ¤Æ¤¤¤ë¡£¤³¤Î»þÅÀ¤Ç (E) ¤Ë¤Æ table ¤ò 0
+¤Ç½é´ü²½¤·¤Æ¤¤¤ëÍýͳ¤¬¤ï¤«¤Ã¤¿¡£Ìڤꬤ¬³ä¤êÅö¤Æ¤é¤ì¤Æ¤¤¤ë¤«¤É¤¦¤«¤ÎȽ
+Ä꤬ɬÍפÀ¤«¤é½é´ü²½¤Ç̤³ä¤êÅö¤Æ¤Ë¤·¤Æ¤ª¤¯É¬Íפ¬¤¢¤ë¤È¤¤¤¦¤³¤È¤À¡£¤â¤Á
+¤í¤ó (E) ¤Ç½ñ¤¤¤¿Ä̤ê table Á´ÂΤò 0 ¤Ç½é´ü²½¤·¤Æ¤âÌäÂê¤Ï¤Ê¤¤¤·¤½¤ÎÊý¤¬
+¤ï¤«¤ê¤ä¤¹¤¤¤È»×¤Ã¤¿¡£
+
+¤³¤³¤Þ¤Ç¡¢c_table[] ¤òºîÀ®¤¹¤ë¾ì¹ç¤À¤±¤ò¸«¤Æ¤­¤¿¤¬¡¢pt_table ¤Î¾ì¹ç¤â¹Í
+¤¨Êý¤ÏƱ¤¸¤Ê¤Î¤Ç²òÀϤÎɬÍפϤʤ¤¤À¤í¤¦¡£
+
+¤¿¤À¡¢¤³¤ÎÃʳ¬¤Çɽ°ú¤­¤Î¥Ó¥Ã¥È¿ô¤¬ c_table ¤Ë¤Ä¤¤¤Æ¤Ï 12 ¤¬ p_table ¤Ë¤Ä
+¤¤¤Æ¤Ï 8 ¤¬Áª¤Ð¤ì¤Æ¤¤¤ëÍýͳ¤¬ÉÔÌÀ¤Ç¤¢¤ë¡£¤³¤ì¤Ï¡¢ÁÛÁü¤À¤¬ pt_table ¤¬Éä¹æ²½¤¹¤ë
+ʸ»ú¼ï¤Ï¾¯¤Ê¤¤¤Î¤Ç pt_table ¤Ë¤Ä¤¤¤Æ¤Ï 8 bit ¤Î¥Æ¡¼¥Ö¥ë¤ò»È¤Ã¤Æ¤âɽ°ú¤­¤Î³ÎΨ¤¬
+¹â¤¤¤Î¤Ç¤Ï¤Ê¤¤¤À¤í¤¦¤«¡£¤Ä¤Þ¤ê¡¢Îΰè(pt_table ¤Î¥µ¥¤¥º)¤ÎÀáÌó¤òÍ¥À褷¤Æ¤¤¤ë¤Î¤Ç
+¤Ï¤Ê¤¤¤«¤È»×¤¦¡£
+
+\f
+LHA ¥Õ¥¡¥¤¥ë¤Î¹½Â¤(¤Þ¤È¤á)
+--------------------------
+
+°Ê¾å¤Ç LHa for UNIX ¤Ë¤Ä¤¤¤Æ¤Î°ìÄ̤ê¤Î½èÍý¤ò¸«¤¿¤³¤È¤Ë¤Ê¤ë¡£¤³¤³¤«¤é¤Ï
+¼ÂÁõ¤Ë¤Ä¤¤¤Æ¤Ï¶ËÎÏ¿¨¤ì¤º¤Ë LHA ¥Õ¥¡¥¤¥ë¤Î¹½Â¤(°µ½Ì·Á¼°)¤Ë¤Ä¤¤¤Æ¤Þ¤È¤á¤Æ
+¤ß¤è¤¦¡£¤Þ¤¿¡¢¤³¤³¤Þ¤ÇºÙÉô¤Ë¤Ä¤¤¤Æ¤Ê¤¾¤Î¤Þ¤Þ¤È¤·¤Æ¤¤¤¿Éôʬ¤¬¤¢¤ë¤Î¤Ç¤³
+¤ì¤é¤âºÆ¸¡Æ¤¤·¤ÆÌÀ¤é¤«¤Ë¤·¤è¤¦¡£
+
+----------------------------------------------------------------------------
+< LHA ¥Õ¥¡¥¤¥ë¤Î¹½Â¤(1 ¥Ö¥í¥Ã¥¯Ê¬) >
+
+    +-----------+
+    | blocksize |
+    +-----------+
+       16bit
+
+ t_len: c_len ¤Î¥Ï¥Õ¥Þ¥óÌÚ           |
+    +-----+--------------------+     |  +-----+-----+
+    | len |       t_len        |     |  |  0  |root |
+    +-----+--------------------+     |  +-----+-----+
+      TBIT        ?? bit             |  TBIT  TBIT
+                                     |
+ c_len: ʸ»ú¤ÈŤµ¤Î¥Ï¥Õ¥Þ¥óÌÚ       |
+    +-------+------------------+     |  +-------+-------+
+    |  len  |     c_len        |     |  |  0    | root  |
+    +-------+------------------+     |  +-------+-------+
+      CBIT        ?? bit             |   CBIT    CBIT
+                                     |
+ p_len: °ÌÃÖ¤Î(¥Ó¥Ã¥ÈŤÎ)¥Ï¥Õ¥Þ¥óÌÚ |
+    +-----+--------------------+     |  +-----+-----+
+    | len |      p_len         |     |  |  0  |root |
+    +-----+--------------------+     |  +-----+-----+
+     pbit         ?? bit             |
+
+ °µ½Ìʸ(ʸ»ú¤ÈŤµ¡¢°ÌÃ֤ΥӥåÈĹ¤Î¥Ï¥Õ¥Þ¥óÉä¹æ¤È°ÌÃÖ¤ÎÃÍ)
+    +---------------------+
+    |  °µ½Ìʸ             |
+    +---------------------+
+
+
+        method  maxmatch  dicsiz   dicbit   np(dicbit+1) pbit(np <= 2^pbit)
+        ------------------------------------------------------------------
+        -lh4-        256  2^12     12       14 (or 13?)  4 (14 <= 2^4)
+        -lh5-        256  2^13     13       14           4 (14 <= 2^4)
+        -lh6-        256  2^15     15       16           5 (16 <= 2^5)
+        -lh7-        256  2^16     16       17           5 (17 <= 2^5)
+
+        threashold 3
+        NC         256+maxmatch-threshold+1{510}
+        CBIT       9 (NC <= 2^9)
+
+        MAXDEPTH   16
+        NT         MAXDEPTH+1
+        TBIT       4 (NT <= 2^4)
+----------------------------------------------------------------------------
+
+# ¥½¡¼¥¹¾å pt_len ¤È½ñ¤¤¤Æ¤¤¤¿Éôʬ¤Ï¡¢°Ê¹ß¤ÎÀâÌÀ¤Î¤¿¤á¤Ë p_len, t_len
+# ¤È̾Á°¤òÊѹ¹¤·¤Æ¤¤¤ë¡£ÊÑ¿ô pt_len ¤Ïñ¤ËÎΰè¤ÎÀáÌó¤Î¤¿¤á¤Ë»È¤¤²ó¤µ¤ì
+# ¤Æ¤¤¤¿¤À¤±¤Ç¤¢¤ê¤¤¤ï¤Ð¼ÂÁõ¤ÎÅÔ¹ç¤Ç¤¢¤ë¤«¤é¤À¡£
+
+¾åµ­¤Ï¡¢LHA ¥Õ¥¡¥¤¥ë¤Î¹½Â¤(¥Ø¥Ã¥À¤ò½ü¤¯)¤òɽ¤·¤¿¤â¤Î¤Ç¤¢¤ë¡£LHA ¥Õ¥¡¥¤
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+
+         ¼­½ñ¥µ¥¤¥º
+        (Éü¹æºÑ¤ß¤Îʿʸ)
+        |-------------|
+        8 7 6 5 4 3 2 1 x
+        ^                \
+        |                 Éü¹æ³«»Ï°ÌÃÖ
+        x ¤«¤é 8 ʸ»úÁ°¤Î°ÌÃÖ
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+
+¤Þ¤¿¡¢maxmatch{256}¤¬ºÇÂç¥Þ¥Ã¥ÁŤǤ¢¤ê¡¢¤³¤Î¤È¤­¤Î len ¤ÎÃͤÏ
+256+maxmatch-3{509=NC-1} ¤Ç¤¢¤ë¡£
+
+             len(Éü¹æ¸ì)            ¼ÂºÝ¤ÎŤµ
+             ----------------------------------
+             256..256+maxmatch-3    3..maxmatch
+
+¤³¤ì¤é¤ò°µ½Ì¤·¤¿·Á¼°¡Ö°µ½Ìʸ¡×¤Ï Huffman Éä¹æ¤ÎϢ³(¤ª¤è¤Ó°ÌÃÖ¤ÎÃÍ¡£¸å
+½Ò)¤Ç¤¢¤ë¡£°µ½Ìʸ¤Î¥µ¥¤¥º¤Ï¾å¿Þ¤Î blocksize ¤Çɽ¤µ¤ì¡¢blocksize ¿ô¤Îʸ
+»ú¿ô¤Î¾ðÊ󤬽ÐÎϤµ¤ì¤Æ¤¤¤ë¡£¤³¤³¤Ç¡¢¡Öʸ»ú¿ô¡×¤Ï <Ťµ, °ÌÃÖ> ¤ÎÁȤâ 1
+ʸ»ú¤È¤·¤Æ¥«¥¦¥ó¥È¤µ¤ì¤ë¡£Ê¸»ú¤Ê¤Î¤«¡¢<Ťµ, °ÌÃÖ> ¤ÎÁȤʤΤ«¤ÎȽÊ̤ϡ¢
+
+    Éü¹æ¤·¤¿1ʸ»ú >= 256 ¤Î¾ì¹ç
+      Ťµ¤ò¼¨¤¹¡£(¤½¤·¤Æ¤½¤Îľ¸å¤Ë°ÌÃ֤ΠHuffman Éä¹æ¤¬¤¢¤ë)
+
+    Éü¹æ¤·¤¿1ʸ»ú < 256 ¤Î¾ì¹ç
+      ʸ»ú¤ò¼¨¤¹¡£
+
+¤È¤Ê¤Ã¤Æ¤¤¤ë¡£¤½¤·¤Æ¡¢Ê¸»ú¤ÈŤµ¤Î Huffman Éä¹æ¤Ï¡¢Huffman ÌڤξðÊó¤ò¼¨
+¤¹ c_len ¤Ë¤è¤êÉü¹æ¤µ¤ì¡¢°ÌÃ֤ΠHuffman Éä¹æ¤Ï¡¢p_len ¤Ë¤è¤êÉü¹æ¤µ¤ì¤ë¡£
+
+°ÌÃ֤ΠHuffman Éä¹æ¤Ï°ÌÃ֤ξðÊó¤Î¾å°Ì¥Ó¥Ã¥È¤¬ 0 ¤Ç¤¢¤ëÉôʬ¤ò½ü¤¤¤¿¥Ó¥Ã
+¥ÈŤòÉä¹æ²½¤·¤¿¤â¤Î¤Ç¤¢¤ê°ÌÃÖ¤½¤Î¤â¤Î¤ÎÉä¹æ¤Ç¤Ï¤Ê¤¤¡£½¾¤Ã¤Æ°ÌÃÖ¤ÎÉä¹æ
+¤Ï
+
+          +------------------------------+----------+
+          | °ÌÃ֤ΥӥåÈŤΠHuffman Éä¹æ| °ÌÃÖ¤ÎÃÍ |
+          |  (p_len¤«¤éÉü¹æ)             |          |
+          +------------------------------+----------+
+
+¤È Huffman Éä¹æ¤Ë³¤¤¤Æ¼ÂºÝ¤ÎÃͤò¼¨¤¹¥Ó¥Ã¥ÈÎ󤬽ÐÎϤµ¤ì¤Æ¤¤¤ë¡£Îã¤Ç¼¨¤¹
+¤È°Ê²¼¤ÎÄ̤ê¤À¡£
+
+----------------------------------------------------------------------------
+°ÌÃÖ(off)¤Î½ÐÎÏÎã
+
+off = 64 ¤Î¾ì¹ç
+
+     |---- 16 bit -------|
+     +----+----+----+----+
+off  |0000 0000 0100 0000|
+     +----+----+----+----+
+                 |-7 bit-|
+
+¤³¤Î°µ½Ìʸ¤Ï°Ê²¼(Ťµ¤¬ 7 bit ¤Ç¤¢¤ë¤È¤¤¤¦¾ðÊó(HuffmanÉä¹æ²½)¤ÈÃͤΥڥ¢)
+
+                       |-6 bit-|
+     +-----------------+-------+
+     | 7 ¤ÎHuffmanÉä¹æ |00 0000|
+     +-----------------+-------+
+
+¤³¤ÎÎã¤Ç ɬÍץӥåȤǤ¢¤ë 7 bit ÌܤÏɬ¤º 1 ¤Ç¤¢¤ë¤¿¤áÃͤÎÉôʬ¤Ï 6 bit
+½ÐÎϤ¹¤ì¤Ð¤è¤¤¡£
+
+off = 1 ¤Î¾ì¹ç
+
+     |---- 16 bit -------|
+     +----+----+----+----+
+off  |0000 0000 0000 0001|
+     +----+----+----+----+
+                       |-|
+                        1 bit
+
+¤³¤Î°µ½Ìʸ¤Ï°Ê²¼(Ťµ¤¬ 1 bit ¤Ç¤¢¤ë¤È¤¤¤¦¾ðÊó¤Î¤ß)
+
+     +-----------------+
+     | 1 ¤ÎHuffmanÉä¹æ |
+     +-----------------+
+
+off = 0 ¤Î¾ì¹ç
+
+     |---- 16 bit -------|
+     +----+----+----+----+
+off  |0000 0000 0000 0000|
+     +----+----+----+----+
+                        ||
+                         0 bit
+
+¤³¤Î°µ½Ìʸ¤Ï°Ê²¼(Ťµ¤¬ 0 bit ¤Ç¤¢¤ë¤È¤¤¤¦¾ðÊó¤ÏÃͤ¬ 0 ¤È¸«¤Ê¤µ¤ì¤ë)
+
+     +-----------------+
+     | 0 ¤ÎHuffmanÉä¹æ |
+     +-----------------+
+----------------------------------------------------------------------------
+
+# °ÌÃÖ¤òľÀÜ Huffman Éä¹æ²½¤·¤Ê¤¤Íýͳ¤Ï°ÌÃÖ¤ò»Ø¤¹ÃÍ¤Ï slide ¼­½ñ¾å¤ÎǤ
+# °Õ¤Î°ÌÃÖ¤ò»Ø¤¹¤¿¤á¥Ç¡¼¥¿¤ÎÈϰϤ¬¹­¤¯(-lh7- ¤Î¾ì¹ç¤Ç 0 ... 2^16)
+# Huffman Éä¹æ²½¤Ë¤è¤ë°µ½Ì¤Î¸ú²Ì¤¬´üÂԤǤ­¤Ê¤¤¤¿¤á¤À¤È»×¤ï¤ì¤ë¡£°ìÊý¡¢
+# °ÌÃÖ¾ðÊó¤Ï¼­½ñ¾å¤ÎÈæ³ÓŪ¶á¤¤°ÌÃ֤˥ޥåÁ¤·¤ä¤¹¤¤¤Ï¤º¤Ç¤¢¤ë¤«¤é Huffman
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+# ¤È Huffman Éä¹æ²½¤Î¸ú²Ì¤¬¹â¤¤)
+
+Huffman ÌڤξðÊó¤ò¥Õ¥¡¥¤¥ë¤Ë½ÐÎϤ¹¤ëºÝ p_len, c_len ¤Ï¡¢¤½¤ì¤¾¤ì¤ËŬ¤·
+¤¿·Á¼°¤Ç°µ½Ì¤·¤Æ½ÐÎϤµ¤ì¤ë¡£ÆÃ¤Ë c_len ¤Ï¡¢¤µ¤é¤Ë¡¢t_len ¤Ë¤è¤ê
+Huffman Éä¹æ²½¤¹¤ë¤³¤È¤Ç°µ½Ì¤ò¹Ô¤¦¡£
+
+¥Ï¥Õ¥Þ¥óÌÚ {p,c,t}_len ¤Ï¤É¤ÎÉü¹æ¸ì¤¬¥Ï¥Õ¥Þ¥óÌڤΤɤγ¬Áؤˤ¢¤ë¤«¤Î¾ðÊó
+¤Ë¤è¤êɽ¤µ¤ì¤Æ¤¤¤ë¡£¤³¤ì¤À¤±¤Î¾ðÊó¤À¤ÈÌÚ¤ò°ì°Õ¤Ëɽ¤¹¤³¤È¤¬¤Ç¤­¤Ê¤¤¤è¤¦
+¤Ë»×¤¨¤ë¤¬¡¢¼ÂºÝ¤Ï
+
+         Huffman ÌÚ1     Huffman ÌÚ2
+              .             .
+             / \           / \
+            .   a         a   .
+           / \               / \
+          c   b             b   c
+
+Huffman ÌÚ1 ¤È Huffman ÌÚ2 ¤Ï»Þ¤Î¿­¤ÓÊý¤ÈÍÕ¤Ëʸ»ú¤ò¿¶¤ë½çÈ֤ΰ㤤¤Ç¤·¤«
+¤Ê¤¤¡£¤½¤³¤Ç¡¢LHA ¤Ç¤Ï¡¢°Ê²¼¤Îµ¬Â§¤òÀߤ±¤ë¤³¤È¤Ç¡¢{p,c,t}_len ¤Î¾ðÊó¤À
+¤±¤ÇÌÚ¤ò¹½ÃۤǤ­¤ë¤è¤¦¤Ë¤·¤Æ¤¤¤ë¡£
+
+       o ±¦¤ÎÌÚ¤òÍ¥À褷¤ÆºîÀ®¤¹¤ë¡£(±¦¤Î»Þ¤ò¥Ó¥Ã¥È 1 ¤È¤¹¤ë)
+       o Ʊ¤¸³¬ÁؤÎÉü¹æ¸ì¤Î³ä¤êÅö¤Æ¤Ï¥³¡¼¥É½ç¤Ëº¸¤«¤é³ä¤êÅö¤Æ¤ë¡£
+
+Î㤨¤Ð¡¢
+
+    c_len['a'] = 2
+    c_len['b'] = 1
+    c_len['c'] = 3
+    c_len['d'] = 3
+
+¤È¤¤¤¦¾ðÊ󤬽ñ¤«¤ì¤Æ¤¤¤ë¾ì¹ç¡¢
+
+    ³¬ÁØ 1 ¤Ë 1 ¸Ä¤ÎÍÕ(Ãͤ¬ 1 ¤Ç¤¢¤ë c_len[] ¤¬ 1 ¸Ä)
+    ³¬ÁØ 2 ¤Ë 1 ¸Ä¤ÎÍÕ(Ãͤ¬ 2 ¤Ç¤¢¤ë c_len[] ¤¬ 1 ¸Ä)
+    ³¬ÁØ 3 ¤Ë 2 ¸Ä¤ÎÍÕ(Ãͤ¬ 3 ¤Ç¤¢¤ë c_len[] ¤¬ 2 ¸Ä)
+
+¤¬¤¢¤ë¤Î¤Ç°Ê²¼¤Î Huffman ÌڤηÁ¤Ë·è¤Þ¤ë(±¦¤ÎÌÚ¤òÍ¥À褷¤ÆºîÀ®¤¹¤ë)¡£
+
+            .
+           / \
+          .   .       -- ³¬ÁØ1
+             / \
+            .   .     -- ³¬ÁØ2
+               / \
+              .   .   -- ³¬ÁØ3
+
+¤½¤·¤Æ³Æ³¬ÁØËè¤Ëʸ»ú¤ò¥³¡¼¥É½ç¤Ë³ä¤êÅö¤Æ¤ë¤È
+
+            .
+           / \
+          b   .       -- ³¬ÁØ1
+             / \
+            a   .     -- ³¬ÁØ2
+               / \
+              c   d   -- ³¬ÁØ3
+
+
+¤È°ì°Õ¤ËÄê¤Þ¤ë¤³¤È¤È¤Ê¤ë¡£(¡Ö³¬ÁØËè¤Î¥³¡¼¥É½ç¡×¤Î°ÕÌ£¤¬Àµ³Î¤ËÅÁ¤ï¤ë¤è¤¦
+¤¢¤¨¤Æ¡¢b ¤È a ¤òµÕ¤Ë¤·¤Æ¤ß¤¿¡£)
+
+¤Ê¤ª¡¢{p,c,t}_len ¤ÎÃͤϤ¢¤ëʸ»ú¤Î³¬ÁؤΰÌÃÖ¤ò¼¨¤¹¤¬¡¢¤³¤ì¤Ï¤Ä¤Þ¤ê¤¢¤ë
+ʸ»ú¤ò Huffman Éä¹æ²½¤·¤¿¤È¤­¤ÎÉä¹æĹ(bit Ĺ)¤ò¼¨¤·¤Æ¤¤¤ë¤³¤È¤Ë¤Ê¤ë¡£°Ê
+¹ß¡¢{p,c,t}_len ¤Ïź¤¨»ú¤¬Éü¹æ¸ì¡¢Ãͤ¬Éä¹æŤòɽ¤¹ÇÛÎó¤Ç¤¢¤ë¤â¤Î¤È¤·¤Æ
+ÀâÌÀ¤ò¹Ô¤¦¡£¤³¤ÎÇÛÎó¤Î¥µ¥¤¥º¤Ï°µ½ÌÂоݤÎʸ»ú½¸¹ç¤ÎÍ×ÁÇ¿ô¤Ç¤¢¤ê¡¢³ÆÍ×ÁÇ
+¤Ï 0..16 ¤ÎÃͤò»ý¤Ä¡£(LHA ¤Î Huffman ÌڤΥ롼¥ë¤ÇÌڤγ¬ÁØ¤Ï 16 ¤Þ¤Ç¤È¤Ê¤Ã
+¤Æ¤¤¤ë)¤½¤·¤Æ¡¢ÃÍ 0 ¤Ï¤½¤Îʸ»ú¤¬Ê¿Ê¸¤Ë¸½¤ì¤Ê¤¤¤³¤È¤ò¼¨¤¹¡£
+
+----------------------------------------------------------------------------
+        Huffman ÌÚ¡¡   Í×ÁÇ¿ô   ÃͤÎÈÏ°Ï  Í×ÁÇ¿ô¤Î¥Ó¥Ã¥ÈĹ
+        (ÇÛÎó)                  (Éä¹æĹ)
+        p_len          np       0..16     pbit
+        c_len          NC       0..16     CBIT
+        t_len          NT       0..16     TBIT
+
+                      Í×ÁÇ¿ô¤Ï°µ½ÌÂоݤÎʸ»ú½¸¹ç¤Î¿ô
+                      c_len[x]=0 ¤Î¾ì¹ç¡¢Ê¸»ú x ¤ÏÊ£¹ç¤·¤¿·ë²Ì¤Ë¸½¤ì¤Ê¤¤
+                      Í×ÁÇ¿ô¤Î¥Ó¥Ã¥ÈŤÏÍ×ÁÇ¿ô¤òɽ¸½¤¹¤ë¤Î¤ËɬÍפʥӥåÈ
+                      Ĺ(¤³¤Î¸å¤Ç½Ð¤Æ¤¯¤ë)
+----------------------------------------------------------------------------
+
+¤Ç¤Ï¡¢Huffman ÌڤξðÊó¤Î½ÐÎÏ·Á¼°¤Ë¤Ä¤¤¤ÆÀ°Íý¤·¤è¤¦¡£
+
+¤Þ¤º¡¢p_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È¤ò²¼µ­¤Ë¼¨¤¹¡£
+
+----------------------------------------------------------------------------
+< p_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È >
+
+             0      pbit{4 or 5}
+             +-------+-----------+-----------+--   --+-----------+
+             |   n   |  p_len[0] |  p_len[1] | ...     p_len[n-1]|
+             +-------+-----------+-----------+--   --+-----------+
+
+p_len[i] <= 6 ¤Î¾ì¹ç
+
+              0     3bit
+              +-----+
+    p_len[i]  | | | |
+              +-----+
+
+p_len[i] >= 7 ¤Î¾ì¹ç
+
+              0              p_len[i] - 3
+              +----------------+
+    p_len[i]  |1 1 1 1 ... 1 0 |
+              +----------------+
+
+p_len[n...np] ¤Ï¡¢0 ¤È¤Ê¤ë¡£
+
+----------------------------------------------------------------------------
+
+Àè¤Ë¤â½ñ¤¤¤¿Ä̤ê p_len ¤Ï°ÌÃÖ¤ÎÃͤÎɬÍץӥåÈŤò Huffman Éä¹æ²½¤·¤¿¤È
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+17¸Ä(np¸Ä)¤ÎÃͤò Huffman Éä¹æ²½¤·¤¿·ë²Ì(¤ÎÉä¹æĹ)¤Ç¤¢¤ë¡£
+
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+¤Ï 3 bit ¤Ç¡¢¤½¤ì°Ê¾å¤ÎÃͤˤĤ¤¤Æ¤Ï 0 ¤¬¸½¤ì¤ë¤Þ¤Ç¤Î¥Ó¥Ã¥È¿ô¤Çɽ¤¹¤è¤¦
+¤Ë¤Ê¤Ã¤Æ¤¤¤ë¡£
+
+¤Ê¤ª p_len ¤Ï np ¸Ä¤Î¸ÇÄêĹÇÛÎó¤À¤¬¡¢½ÐÎÏ·Á¼°¤È¤·¤Æ¤ÏÀèƬ¤Ë pbit Éý
+¤Î p_len ¤ÎÍ×ÁÇ¿ô¤ò½ÐÎϤ·¤Æ¤¤¤ë¡£¤³¤ì¤Ï¤Ê¤¼¤«¤È¤¤¤¦¤È p_len ¤Î¸åÊý¤ÎÃÍ
+(p_len[n...np])¤¬ 0 ¤Ç¤¢¤ë¾ì¹ç¤Ë¤½¤ÎÍ×ÁǤò½ÐÎϤ·¤Ê¤¤¤ÇºÑ¤à¤è¤¦¤Ë¤¹¤ë¤¿
+¤á¤Ç¤¢¤ë¡£¤³¤ì¤Ï¾¤Î Huffman Éä¹æ¤Ë¤Ä¤¤¤Æ¤âƱÍͤǤ¢¤ë¡£
+
+# ¤Ê¤¼¡¢¤³¤Î¤è¤¦¤Ê·Á¼°¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤«¹Í¤¨¤Æ¤ß¤¿¡£
+#
+# p_len ¤ÎÃͤÎÈϰϤϡ¢0 .. 16 ¤Ç¤¢¤ë¤«¤é 1 Í×ÁÇ¤Ï 6 bit ¤Çɽ¸½²Äǽ¤Ç¤¢¤ê¡¢
+# ñ½ã¤Ë½ÐÎϤ·¤¿¾ì¹ç¤ò¹Í¤¨¤ë¤È 6 * 17 = 102 bit ¤Çɽ¸½²Äǽ¤Ç¤¢¤ë¡£
+#
+# °ìÊý¡¢p_len ¤Î½ÐÎÏ·Á¼°¤Î¾ì¹ç¡¢LHA ¤Î Huffman Ìڤγ¬ÁؤϺÇÂç 16 ³¬ÁؤǤ¢
+# ¤ë¤³¤È¤«¤é¡¢ºÇ°­¤¹¤Ù¤Æ¤Î p_len[] ¤Ë¤Ä¤¤¤Æ¥Ó¥Ã¥È¿ô¤Î·Á¼°(p_len[] >= 7)
+# ¤¬»È¤ï¤ì¤¿¾ì¹ç 1 ¤Ä¤Î p_len[] ¤Ë 16-3 bit * 17 = 221 bit »È¤¦¤³¤È¤Ë¤Ê
+# ¤êºÇ°­¤Î»ÈÍÑÎΰè¤ÏÂ礭¤¯¤Ê¤Ã¤Æ¤·¤Þ¤¦¤è¤¦¤Ë»×¤¨¤Æ¤·¤Þ¤¦¡£
+#
+# ¤·¤«¤·¡¢¼ÂºÝ¤Ë¤Ï¤½¤¦¤Ï¤Ê¤é¤Ê¤¤¡£¤È¤¤¤¦¤Î¤â np ¤¬ 17 ¤Ç¤¢¤ë¤«¤é
+# Huffman ÌÚ¤ÎÍդοô¤ÏºÇÂç¤Ç¤â 17 ¤Ë¤·¤«¤Ê¤é¤Ê¤¤¡£¤½¤·¤ÆÍդοô¤¬ np ¤Ç
+# ºÇ¤â Huffman ÌÚ¤¬¿¼¤¯¤Ê¤ë¤Î¤Ï
+#
+#        .
+#       / \
+#      .   .        --  1 ³¬ÁØÌÜ
+#         / \
+#        .   .      --  2 ³¬ÁØÌÜ
+#           / \
+#          .   .    --  3 ³¬ÁØÌÜ
+#              :
+#              .
+#             / \
+#            .   .  -- 16 ³¬ÁØÌÜ
+#
+# ¤È¤Ê¤ë¾ì¹ç¤Ç¡¢¤³¤Î¾ì¹ç¤Î p_len ¤Î½ÐÎϥӥåÈŤÏ
+#
+#    2*(16-3) + (15-3) + ... (7-3) + 6*3
+#  = 2*13 + 12 +  ... 4 + 18
+#  = 167 bit
+#
+# ¤Ç¤¢¤ë¡£Ã±½ã¤Ë½ÐÎϤ¹¤ë¾ì¹ç¤ËÈæ¤Ù¤ë¤È 65 bit Áý¤¨¤ë¡£¤Þ¤¿¡¢1 ³¬Áظº¤é
+# ¤·¤¿¾ì¹ç¤Ï¡¢
+#
+#        .
+#       / \
+#      .   .        --  1 ³¬ÁØÌÜ
+#         / \
+#        .   .      --  2 ³¬ÁØÌÜ
+#           / \
+#          .   .    --  3 ³¬ÁØÌÜ
+#              :
+#             / \
+#            .   .    -- 13 ³¬ÁØÌÜ
+#               / \
+#             .     .
+#            / \   / \
+#           .   . .   .  -- 15 ³¬ÁØÌÜ
+#
+#    4*(15-3) + (13-3) + ... (7-3) + 6*3
+#  = 4*12 + 10 + ... 4 + 18
+#  = 115 bit
+#
+# ¤Ç¤¢¤ë¡£¤Ê¤ª¡¢¤³¤ÎÌڤξì¹ç¤âÍÕ¤Ï np ¸Ä¤¢¤ë¡£¤â¤¦ 1 ³¬Áظº¤é¤·¤Æ¤ß¤è¤¦¡£
+#
+#        .
+#       / \
+#      .   .        --  1 ³¬ÁØÌÜ
+#         / \
+#        .   .      --  2 ³¬ÁØÌÜ
+#           / \
+#          .   .    --  3 ³¬ÁØÌÜ
+#              :
+#           /     \
+#          .       .        -- 12 ³¬ÁØÌÜ
+#         / \     /  \
+#        .   .   .     .    -- 13 ³¬ÁØÌÜ
+#               / \   / \
+#              .   . .   .  -- 14 ³¬ÁØÌÜ
+#
+#
+#    4*(14-3) + 2*(13-3) + (11-3) + ... + (7-3) + 6*3
+#  = 4*11 + 2*10 + 8 + ... 4 + 18
+#  = 112 bit
+#
+# ¤³¤ÎÄ´»Ò¤Ç¡¢¤µ¤é¤Ë¸º¤é¤¹¤È
+#
+# 13 ³¬ÁØ
+#    4*(13-3) + 2*(12-3) + (10-3) + ... + (7-3) + 6*3
+#  = 4*10 + 2*9 + 7 + ... + 4 + 18
+#  = 98
+#
+# 13 ³¬ÁØÌܤÇñ½ã¤Ë½ÐÎϤ¹¤ë¤è¤ê¤â¾®¤µ¤¯¤Ê¤Ã¤¿¡£´¶³ÐŪ¤Ë¤Ï¡¢¤¢¤Þ¤ê¸ú²Ì¤Ï
+# ´üÂԤǤ­¤Ê¤¤¤è¤¦¤Ë¸«¤¨¤ë¡£¤³¤ì¤Ï¶²¤é¤¯¤Ï p_len ¤Ë¤Ä¤¤¤Æ¤ÏÉä¹æŤ¬ 6
+# °Ê²¼¤Ë¤Ê¤ë¾ì¹ç¤¬Â¿¤¤¤Î¤Ç¤¢¤í¤¦(¤¹¤Ù¤Æ¤¬ 6 °Ê²¼¤Ç¤¢¤ì¤Ð¡¢3 * 17 = 51
+# bit ¤Ç¤¢¤ê 51 bit ºï¸º¤Ç¤­¤ë)¡£³¬Áؤ¬ 6 ¤Ç¤¢¤ë Huffman ÌÚ¤ÎÍդοô¤ÏºÇ
+# Âç 2^6 {64} ¤Ç¤¢¤ë¤«¤é NP{17} ¼ïÎà¤Îʿʸ¤ò³ÊǼ¤¹¤ëΨ¤¬¹â¤¤¤Î¤Ç¤¢¤í¤¦¡£
+
+³¤¤¤Æ c_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È¤ò¼¨¤¹¡£
+
+----------------------------------------------------------------------------
+< c_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È >
+
+             0       CBIT{9}
+             +-------+-----------+-----------+--   --+-----------+
+             |   n   |  c_len[0] |  c_len[1] | ...     c_len[n-1]|
+             +-------+-----------+-----------+--   --+-----------+
+
+c_len[i] == 0 ¤Î¾ì¹ç
+
+ 0 ¤¬Â³¤¯¿ô¤ò count ¤È¤¹¤ë¤È¡¢
+
+ count == 1 ¤Î¾ì¹ç
+
+                t_len[0]
+              <---------->
+             +------------+
+             |  t_code[0] |
+             +------------+
+
+ count == 2 ¤Î¾ì¹ç
+
+                t_len[0]     t_len[0]
+              <----------> <---------->
+             +------------+------------+
+             |  t_code[0] |  t_code[0] |
+             +------------+------------+
+
+ count == 3..18 ¤Î¾ì¹ç
+
+                t_len[1]    4 bit
+              <----------> <------>
+             +------------+-------+
+             |  t_code[1] |count-3|
+             +------------+-------+
+
+ count == 19 ¤Î¾ì¹ç
+
+                 t_len[0]    t_len[1]    4 bit
+              <----------> <----------> <------>
+             +------------+------------+-------+
+             |  t_code[0] |  t_code[1] |count-3|
+             +------------+------------+-------+
+
+  count >= 20 ¤Î¾ì¹ç
+
+                 t_len[2]    CBIT{9}
+              <----------> <------>
+             +------------+--------+
+             |  t_code[2] |count-20|
+             +------------+--------+
+
+c_len[i] > 0 ¤Î¾ì¹ç
+
+               t_len[c_len[i]+2]
+              <----------------->
+             +-------------------+
+             | t_code[c_len[i]+2]|
+             +-------------------+
+
+c_len[n...NC] ¤Ï¡¢0 ¤È¤Ê¤ë¡£
+
+----------------------------------------------------------------------------
+
+c_len[] ¤ÎÃͤϤ¢¤ëÄøÅÙ 0 ¤¬Ï¢Â³¤¹¤ë¾ì¹ç¤¬Â¿¤¤¤³¤È¤¬´üÂԤǤ­¤ë¡£
+c_len[i]=0 ¤Î¾ì¹ç¤È¤¤¤¦¤Î¤Ï¤½¤Îʸ»ú(i)¤¬Ê¿Ê¸¤Ë¸½¤ì¤Ê¤¤¾ì¹ç¤ò¼¨¤¹¡£
+ASCII ¥Æ¥­¥¹¥È¥Õ¥¡¥¤¥ë¤Î°µ½Ì¤Ê¤é 0..127 ¤ÎÈϰϤΥ³¡¼¥É¤·¤«»È¤ï¤ì¤Ê¤¤¤¿
+¤á¤½¤ì°Ê³°¤Ï 0 ¤Ë¤Ê¤ë¤Ê¤É¤Ç¤¢¤ë¡£¤½¤·¤Æ c_len ¤òñ½ã¤Ë½ÐÎϤ¹¤ë¤³¤È¤ò¹Í
+¤¨¤¿¤È¤­ c_len[i]=0 ¤Ç¤¢¤ë¾ðÊó¤ò¿¿ô½ÐÎϤ¹¤ë¤³¤È¤Ë¤Ê¤êÎΰ褬̵Â̤Ǥ¢¤ë
+(c_len ¤Ï NC{255+256+2-3=510} ¸Ä¤ÎÍ×ÁǤò»ý¤Á¤½¤ÎÃæ¤Ç̤»ÈÍÑʸ»ú¤ä̤»ÈÍÑ
+Ť¬Â¿¿ô¤¢¤ë¤³¤È¤òÁÛÄꤷ¤Æ¤¤¤ë)¡£¤½¤³¤Ç 0 ¤¬Ï¢Â³¤·¤Æ¸½¤ì¤ëÆÃħ¤òÀ¸¤«¤·
+
+    o c_len[]=0 ¤¬Ï¢Â³¤Ç1¸Ä
+    o c_len ¤¬Ï¢Â³¤Ç 3¡Á18 ¸Ä
+    o c_len ¤¬Ï¢Â³¤Ç20¸Ä°Ê¾å(20¡ÁNC{510})
+
+¤ò¤½¤ì¤¾¤ì°ì¤Ä¤Îʸ»ú¤È¸«¤Ê¤·¤Æ Huffman Éä¹æ²½¤¹¤ë¤³¤È¤Ç c_len ¼«ÂΤνÐ
+ÎÏ¥µ¥¤¥º¤ò¾®¤µ¤¯¤·¤Æ¤¤¤ë¡£¤³¤ì¤Ï 0 ¤Î½Ð¸½ÉÑÅÙ¤òñ½ã¤Ë Huffman Éä¹æ²½¤¹
+¤ë¤è¤ê¤â¸ú²Ì¤¬´üÂԤǤ­¤ë¡£
+
+¾å¿Þ¤Ç t_code ¤Ï c_len ¤ò Huffman Éä¹æ²½¤·¤¿¤È¤­¤ÎÉä¹æɽ¤ò¼¨¤·¤Æ¤ª¤ê
+
+    o t_code[0] ... c_len[i] ¤Ï 0 ¤¬ 1 ¸Ä
+    o t_code[1] ... c_len[i] ¤Ï 0 ¤¬ 3¡Á18 ¸Ä(³¤¯4 ¥Ó¥Ã¥È¤Î¥Ó¥Ã¥ÈÎó¤Ç
+                    ¸Ä¿ô¤¬¤ï¤«¤ë)
+    o t_code[2] ... c_len[i] ¤Ï 0 ¤¬ 20¡ÁNC-1¸Ä(³¤¯ CBIT ¥Ó¥Ã¥È¤Î¥Ó¥Ã¥È
+                    Îó¤Ç¸Ä¿ô¤¬¤ï¤«¤ë)
+    o t_code[x] ... c_len[i]=x-2  (x>2)
+
+¤ÈÉü¹æ¤¹¤ë¤³¤È¤Ë¤Ê¤ë¡£c_len[i] = 0 ¤¬ 2 ¸Ä¤¢¤ë¤¤¤Ï 19 ¸Ä³¤¯¾ì¹ç¤Ï
+
+    t_code[0] ¤¬ 2 ¸Ä
+    t_code[0] ¤È t_code[1] ¤¬ 1 ¸Ä¤º¤Ä
+
+¤Ç½ÐÎϤµ¤ì¤Æ¤¤¤ë¡£
+
+ºÇ¸å¤Ë¡¢t_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È¤ò¼¨¤¹¡£
+
+----------------------------------------------------------------------------
+< t_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È >
+
+                                             2 bit
+   0      TBIT{5}                           |--|
+   +-------+----------+----------+----------+--+----------+-    -+-----------+
+   |   n   | t_len[0] | t_len[1] | t_len[2] | x|t_len[x+3]| ...  | t_len[n-1]|
+   +-------+----------+----------+----------+--+----------+-    -+-----------+
+
+t_len[i] <= 6 ¤Î¾ì¹ç
+
+              0     3bit
+              +-----+
+    t_len[i]  | | | |
+              +-----+
+
+t_len[i] >= 7 ¤Î¾ì¹ç
+
+              0             t_len[i] - 3
+              +----------------+
+    t_len[i]  |1 1 1 1 ... 1 0 |
+              +----------------+
+
+t_len[2] ¤Îľ¸å¤Ï 2 bit ¤Î¾ðÊó¤¬Éղ䵤ì¤ë¡£¤³¤ÎÃͤò x{0..3} ¤È¤¹¤ë¤È¡¢
+t_len[3 .. x+2] ¤ÎÈÏ°Ï¤Ç 0 ¤¬Â³¤¯¤³¤È¤ò°ÕÌ£¤·¡¢¤³¤Î 2 bit °Ê¹ß¤Ï¡¢
+t_len[x+3] ¤¬Â³¤¯¤³¤È¤Ë¤Ê¤ë¡£x ¤¬ 0 ¤Î¾ì¹ç¤Ï¡¢t_len[3] ¤Ï 0 ¤Ç¤Ï¤Ê¤¤¡£
+
+t_len[n...NT] ¤Ï¡¢0 ¤È¤Ê¤ë¡£
+
+----------------------------------------------------------------------------
+
+´ðËÜŪ¤Ê¹Í¤¨¤Ï p_len[] ¤Î¾ì¹ç¤ÈƱ¤¸¤Ç¤¢¤ë(t_len[] ¤ÎÍ×ÁÇ¿ô NT ¤Ï 19)¡£
+¤¿¤À¤· t_len[3..5] ¤Ë¤Ä¤¤¤ÆÆÃÊÌ°·¤¤¤µ¤ì¤Æ¤¤¤ë¡£
+
+¤Þ¤º¡¢t_len[] ¤È c_len[x] ¤ÎÃͤÎÂбþ¤ò°Ê²¼¤ËÀ°Íý¤·Ä¾¤¹¡£
+
+      t_len[0]  c_len[x]=0 1 ¤Ä¤ò 1 ʸ»ú¤È¤ß¤Ê¤¹
+      t_len[1]  c_len[x]=0 ¤¬ 3¡Á18 ¸ÄϢ³¤·¤Æ¤¤¤ë²ô¤ò 1 ʸ»ú¤È¤ß¤Ê¤¹
+      t_len[2]  c_len[x]=0 ¤¬ 20¡ÁNC{510} ¸ÄϢ³¤·¤Æ¤¤¤ë²ô¤ò 1 ʸ»ú¤È¤ß¤Ê¤¹
+      t_len[3]  c_len[x]=1
+      t_len[4]  c_len[x]=2
+      t_len[5]  c_len[x]=3
+      t_len[6]  c_len[x]=4
+          :
+      t_len[18] c_len[x]=16
+
+t_len[3..5] ¤ÎÆÃÊÌ°·¤¤¤Ë¤Ä¤¤¤Æ¹Í¤¨¤ë¤È t_len[3..5] ¤ÎÈÏ°Ï¤Ç 0 ¤¬Ï¢Â³¤¹
+¤ë¾ì¹ç¤Ë¡¢2 ¥Ó¥Ã¥È¤Ç¤½¤Î¤³¤È¤òɽ¤·¤Æ¤¤¤ë¡£¤³¤ì¤Ï¤Ä¤Þ¤ê¤³¤Î¤è¤¦¤Ê¾ì¹ç¤¬
+¿¤¤¤Î¤Ç¤¢¤í¤¦¡£¾å¤ÇÂбþ´Ø·¸¤ò¼¨¤·¤¿¤È¤ª¤ê¡¢t_len[3..5] ¤¬ 0 ¤Ç¤¢¤ë¾ì¹ç
+¤È¤¤¤¦¤Î¤Ï¡¢¤Ä¤Þ¤ê¥Ó¥Ã¥ÈĹ c_len[x] ¤¬ 1..3 ¤ÎÈϰϤÎÃͤò»ý¤¿¤Ê¤¤¾ì¹ç¤ò
+¼¨¤¹¡£
+
+# c_len[x] ¤¬ 1..3 ¤ÎÃͤò»ý¤Ä¾ì¹ç¤È¤¤¤¦¤Î¤Ï Huffman Ìڤˤª¤¤¤Æ¤¢¤ë 3 ʸ»ú
+# ¤Î½Ð¸½ÉÑÅÙ¤¬¶Ëü¤Ë¿¤¤¾ì¹ç¤ò¼¨¤¹¡£¤³¤Î¤è¤¦¤Ê¾ì¹ç¤Ï¤¢¤Þ¤ê¤Ê¤¤¤Ç¤¢¤ë¤ÈÁÛ
+# Äꤷ¤Æ¤¤¤ë¤Î¤À¤í¤¦¡£
+#
+#            .
+#           / \
+#          a   .
+#             / \
+#            b   .
+#               / \
+#              c   .
+#                 / \
+#                .   .
+#               / \ / \
+
+°Ê¾å¤Ç LHA ¥Õ¥¡¥¤¥ë¤Î¹½Â¤¤Ë¤Ä¤¤¤Æ¤Ò¤È¤È¤ª¤êÀâÌÀ¤·¤¿¤³¤È¤Ë¤Ê¤ë¡£¤¿¤À¤·¡¢
+Éü¹æ½èÍý¤ò¹Í¤¨¤ë¾ì¹ç¤ËÃí°Õ»ö¹à¤¬¤¢¤ë¡£¤³¤ì¤Ï¤³¤Î¸å¤ÇÀâÌÀ¤·¤è¤¦¡£
+
+\f
+¥»¥­¥å¥ê¥Æ¥£¥Ð¥°¤Î¹Í»¡
+----------------------
+
+2006ǯ8·î LHA ¤ÎÉü¹æ½èÍý¤Ë¥»¥­¥å¥ê¥Æ¥£¥Ð¥°(CVE-2006-4335,4337,4338)¤¬È¯
+¸«¤µ¤ì¤¿¡£¤³¤ÎÌäÂê¤Ï LHA ¤Î¼ÂÁõ¤Ë¤ª¤¤¤ÆÉä¹æ²½¤Ë¤Ä¤¤¤Æ¤ÏÅöÁ³¤¢¤é¤æ¤ëÆþÎÏ
+¥Õ¥¡¥¤¥ë¤òÁÛÄꤷ¤¿½èÍý¤È¤Ê¤Ã¤Æ¤¤¤ë¤¬Éü¹æ¤Ë¤Ä¤¤¤Æ¤Ï°µ½Ì¥Õ¥¡¥¤¥ë¤¬Àµ¤·¤¤
+¹½Â¤¡¢ÃͤǺîÀ®¤µ¤ì¤Æ¤¤¤ë¤³¤È¤·¤«ÁÛÄꤻ¤º¤Ë½èÍý¤¬ºî¤é¤ì¤Æ¤¤¤¿¤¿¤á¤Ç¤¢¤ë¡£
+¤Ä¤Þ¤ê¡¢ÉÔÀµ¤Ê°µ½Ì¥Õ¥¡¥¤¥ë¤¬Í¿¤¨¤é¤ì¤¿¾ì¹ç¤ÎÆ°ºî¤¬ÉÔÄê¤À¤Ã¤¿¤Î¤À¡£
+
+¤³¤³¤Ç¤Ï¡¢LHA ¤ÎÉü¹æ¤Ë¤ª¤¤¤ÆÃí°Õ¤¹¤Ù¤­ÅÀ¤Ë¤Ä¤¤¤Æ¹Í»¡¤¹¤ë¡£¤Þ¤¿¡¢¤³¤³¤Þ
+¤Ç¤Ë²òÆɤ·¤¿ LHa for UNIX ver.1.14i ¤Î¥½¡¼¥¹¤Ï¤³¤Î¥»¥­¥å¥ê¥Æ¥£¥Ð¥°¤¬
+»Ä¤Ã¤Æ¤¤¤¿¤â¤Î¤Ê¤Î¤Ç¡¢¥»¥­¥å¥ê¥Æ¥£¥Ð¥°¤ÎÂкö¤ò¹Ô¤Ã¤¿¥½¡¼¥¹¤Ë¤Ä¤¤¤Æ¤â¸å
+¤Ç²òÀϤò¹Ô¤¦¤³¤È¤È¤¹¤ë¡£
+
+°Ê²¼¡¢LHA ¤Î¹½Â¤¤òºÆ·Ç¤·¡¢³ÆÉü¹æ½èÍý¤ÇÃí°Õ¤¹¤Ù¤­ÅÀ¤ò³Îǧ¤·¤è¤¦¡£
+°Ê¹ß¤ÎÀâÌÀ¤Ç¤ÏÃí°ÕÅÀËè¤Ë (1) (2) ¤Î¤è¤¦¤ËÈÖ¹æ¤ò¿¶¤Ã¤Æ¤¤¤ë¡£ºÇ½ªÅª¤Ë
+Á´¥Á¥§¥Ã¥¯¥Ý¥¤¥ó¥È¤ò¥Á¥§¥Ã¥¯¤¹¤ë¤è¤¦¤Ë½¤Àµ¤·¤¿¥½¡¼¥¹¤òºÜ¤»¡¢¤³¤ÎÈÖ¹æ¤Ç
+ɳÉÕ¤±¤ò¹Ô¤¦¤³¤È¤È¤¹¤ë¡£
+
+----------------------------------------------------------------------------
+< LHA ¥Õ¥¡¥¤¥ë¤Î¹½Â¤(1 ¥Ö¥í¥Ã¥¯Ê¬) >
+
+    +-----------+
+    | blocksize |
+    +-----------+
+       16bit
+
+ ¥Ï¥Õ¥Þ¥óÌÚ
+    +-----------+-----------+-----------+
+    | t_len     | c_len     | p_len     |
+    +-----------+-----------+-----------+
+
+ °µ½Ìʸ(ʸ»ú¤ÈŤµ¡¢°ÌÃ֤ΥӥåÈĹ¤Î¥Ï¥Õ¥Þ¥óÉä¹æ¤È°ÌÃÖ¤ÎÃÍ)
+    +---------------------+
+    |  °µ½Ìʸ             |
+    +---------------------+
+
+----------------------------------------------------------------------------
+
+(1)
+blocksize ¤ÎÆɤ߹þ¤ß¤Ë¤Ä¤¤¤Æ¤³¤ÎÃÍ¤Ï 1¡Á0xffff ¤Ë¤Ä¤¤¤Æ¤ÏÀµ¤·¤¤¤¬ 0 ¤Ë
+¤Ê¤ë¤³¤È¤Ï¤¢¤êÆÀ¤Ê¤¤¤Î¤Ç 0 ¤Î¾ì¹ç¤ËÉÔÀµ¤ÈȽÃǤ·¤Æ¤â¤è¤¤¤È»×¤ï¤ì¤ë¡£
+
+(2)
+¡Ö°µ½Ìʸ¡×¼«ÂΤˤĤ¤¤Æ¤Ï¡¢blocksize ¿ô¤òÍê¤ê¤ËÆɤ߹þ¤à¤Î¤Ç blocksize ¤ò
+±Û¤¨¤Æ°µ½Ìʸ¤¬Â¸ºß¤·¤Æ¤â¼¡¤Î block ¤È¤·¤ÆÆɤޤì¤ë¤À¤±¤Ç¤¢¤ë¡£blocksize
+¤ËËþ¤¿¤Ê¤¤¾ì¹ç¤Ï¡¢EOF ¤ò¸¡ÃΤ·¤ÆÁá´ü¤ËÉÔÀµ¤ÈȽÃǤ¹¤ë¤è¤¦¤Ë½èÍý¤·¤¿Êý¤¬
+¤è¤¤¤À¤í¤¦¡£
+
+°µ½ÌʸÃæ¤Îʸ»ú¤ÈŤµ¤Ë¤Ä¤¤¤Æ¤Ï
 
+    Éü¹æ¤·¤¿1ʸ»ú >= 256 ¤Î¾ì¹ç
+      Ťµ¤ò¼¨¤¹¡£(¤½¤·¤Æ¤½¤Îľ¸å¤Ë°ÌÃ֤ΠHuffman Éä¹æ¤¬¤¢¤ë)
+
+    Éü¹æ¤·¤¿1ʸ»ú < 256 ¤Î¾ì¹ç
+      ʸ»ú¤ò¼¨¤¹¡£
+
+¤Ç¤¢¤ê¡¢Ê¸»ú¤È¤·¤Æ¤Ï 0 .. 255 ¤¹¤Ù¤Æ¤Ë¤Ä¤¤¤ÆÀµ¤·¤¤ÃͤʤΤÇÌäÂê¤Ï¤Ê¤¤¡£
+
+(3)
+Ťµ¤Ï 256 ... NC{256+maxmatch-3+1} ¤ÎÈϰϤÎÃͤò¼è¤ë¤Î¤Ç¤³¤ì¤òĶ¤¨¤ëÃÍ
+¤òÊÖ¤¹¾ì¹ç¤ÏÉÔÀµ¤ÈȽÃǤ·¤Æ¤â¤è¤¤¡£¤¿¤À¤·¡¢¤³¤ÎȽÄ꼫ÂÎ¤Ï c_len ¤òÆɤ߹þ
+¤ß Huffman ÌÚ¤ò¹½ÃÛ¤¹¤ë¤È¤­¤Ë¹Ô¤¦¤³¤È¤â¤Ç¤­¤ë¡£(¼ÂºÝ¡¢¼ÂÁõ¤Ç¤Ï
+Huffman Ìڤˤ³¤ÎÈÏ°ÏÆâ¤ÎÉü¹æ¸ì¤·¤«³ä¤êÅö¤Æ¤Ê¤¤¤Î¤Ç¥Ð¥°¤Ç¤Ê¤¤¸Â¤ê¤ÏȯÀ¸
+¤·¤Ê¤¤¤À¤í¤¦)
+
+°ÌÃ֤ˤĤ¤¤Æ¤Ï²¼¿Þ¤ÎÄ̤ê°ÌÃ֤ΥӥåÈŤΠHuffman Éä¹æ¤È°ÌÃÖ¤ÎÃͤ¬½ñ¤«¤ì
+¤Æ¤¤¤ë¡£
+
+          +------------------------------+----------+
+          | °ÌÃ֤ΥӥåÈŤΠHuffman Éä¹æ| °ÌÃÖ¤ÎÃÍ |
+          +------------------------------+----------+
+
+(4)
+°ÌÃÖ¤ÎÃͤȤ·¤Æ¤Ï 0 ... 2^dicbit ¤ÎÈϰϤÎÃͤò»ý¤Ä¤Î¤Ç Huffman Éä¹æ¤ÎÉü¹æ
+·ë²Ì¤¬ 0 ... np{dicbit+1} ¤ÎÈϰϤǤ¢¤ì¤Ð°ÌÃÖ¤ÎÃÍÉôʬ¤Ë¤Ä¤¤¤Æ¥Á¥§¥Ã¥¯¤¹
+¤ëɬÍפϤʤ¤¡£½¾¤Ã¤Æ¡¢c_len ¤ÈƱ¤¸¤¯¥Ï¥Õ¥Þ¥óÌڤι½ÃÛ¤ÎÃʳ¬¤ÇÉÔÀµ¤ÊÉü¹æ
+¸ì¤òÊÖ¤µ¤Ê¤¤¤è¤¦¤Ë¤·¤Æ¤¤¤ì¤Ð¤è¤¤¡£
+
+¤Ç¤Ï¡¢t_len ¤Ë¤Ä¤¤¤Æ¸«¤Æ¤ß¤ë¡£
+
+----------------------------------------------------------------------------
+< t_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È >
+
+                                             2 bit
+   0      TBIT{5}                           |--|
+   +-------+----------+----------+----------+--+----------+-    -+-----------+
+   |   n   | t_len[0] | t_len[1] | t_len[2] | x|t_len[x+3]| ...  | t_len[n-1]|
+   +-------+----------+----------+----------+--+----------+-    -+-----------+
+
+t_len[i] <= 6 ¤Î¾ì¹ç
+
+              0     3bit
+              +-----+
+    t_len[i]  | | | |
+              +-----+
+
+t_len[i] >= 7 ¤Î¾ì¹ç
+
+              0             t_len[i] - 3
+              +----------------+
+    t_len[i]  |1 1 1 1 ... 1 0 |
+              +----------------+
+
+t_len[2] ¤Îľ¸å¤Ï 2 bit ¤Î¾ðÊó¤¬Éղ䵤ì¤ë¡£¤³¤ÎÃͤò x{0..3} ¤È¤¹¤ë¤È¡¢
+t_len[3 .. x+2] ¤ÎÈÏ°Ï¤Ç 0 ¤¬Â³¤¯¤³¤È¤ò°ÕÌ£¤·¡¢¤³¤Î 2 bit °Ê¹ß¤Ï¡¢
+t_len[x+3] ¤¬Â³¤¯¤³¤È¤Ë¤Ê¤ë¡£x ¤¬ 0 ¤Î¾ì¹ç¤Ï¡¢t_len[3] ¤Ï 0 ¤Ç¤Ï¤Ê¤¤¡£
+
+t_len[n...NT] ¤Ï¡¢0 ¤È¤Ê¤ë¡£
+
+----------------------------------------------------------------------------
+
+(5)
+t_len ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È¤ÎÀèƬ TBIT{5} ¤Ï 0 ... 2^5{32} ¤ÎÈϰϤÎÃͤò³Ê
+Ǽ¤Ç¤­¤ë¤¬ t_len ¤ÎÎΰ襵¥¤¥º¤Ï NT{19} ¤Ê¤Î¤Ç 0..19 ¤ÎÈϰϤòĶ¤¨¤ë¾ì¹ç
+¤ÏÉÔÀµ¤ÈȽÃǤ·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
+
+(6)
+¤Þ¤¿¡¢t_len[i] >= 7 ¤Î¾ì¹ç¤Î·Á¼°¤Ï bit 0 ¤ò¸¡½Ð¤¹¤ë¤Þ¤Ç¤Î¥Ó¥Ã¥ÈŤ¬ÃͤÈ
+¤Ê¤ë¤¬ t_len[i] ¤ÎÃͤϥϥեޥóÉä¹æĹ¤Ê¤Î¤Ç 0 .. 16 ¤ÎÈϰϤǤʤ±¤ì¤Ð¤Ê¤é
+¤Ê¤¤¡£t_len[i] >= 7 ¤Î·Á¼°¤Î¶ñÂÎŪ¤ÊÃͤÎÂбþ¤Ï
+
+      7: 1110
+      8: 1111 0
+      :
+     15: 1111 1111 1110
+     16: 1111 1111 1111 0
+
+¤È¤Ê¤Ã¤Æ¤¤¤ë¤Î¤Ç¡¢16 ¤Î¾ì¹ç¤Î¥Ó¥Ã¥ÈĹ(1 ¤¬ 12 bit ³¤¯)¤è¤ê¥Ó¥Ã¥ÈŤ¬Ä¹
+¤¤¾ì¹ç¤ÏÉÔÀµ¤Ç¤¢¤ë¡£(ºÇÂç 12 ¥Ó¥Ã¥È¤Þ¤Ç¤·¤«¸«¤Ê¤¤¤È¤¹¤ë¤³¤È¤â¹Í¤¨¤é¤ì¤ë¤¬¡¢
+LHA ¤Î°µ½Ì½èÍý¤Ï¾å¤ÎÎã¤Î¤è¤¦¤Ë 16 ¤Î¾ì¹ç¤Ç¤â¥Ó¥Ã¥È 0 ¤ò½ÐÎϤ¹¤ë¤Î¤Ç¡¢¤½
+¤Î¤è¤¦¤ÊÆɤßÊý¤ò¤¹¤ë¤ÈÀµ¾ï¤Ê°µ½Ìʸ¤òÉü¹æ¤Ç¤­¤Ê¤¯¤Ê¤ë¡£)
+
+(7)
+¤µ¤é¤Ë¡¢t_len ¤òÆɤ߹þ¤ó¤À¸å¤Ë¹½ÃÛ¤·¤¿ Huffman ÌÚ¤Ï Huffman ÌڤȤ·¤ÆÀ°¹ç
+À­¤¬Êݤ¿¤ì¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
+¤¿¤È¤¨¤Ð¡¢LHA ¤Ë¤ª¤±¤ë Huffman Ìڤϰʲ¼¤ÎÀ­¼Á¤¬¼é¤é¤ì¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¤Ï
+¤º¤À¡£
+
+   o t_len[x] <= 16 (LHA ¤Î Huffman Ìڤγ¬ÁØ¤Ï 16 ¤Þ¤Ç¤Ç¤¢¤ë)
+
+   o ³Æ³¬ÁؤÎÍդοô¤ÏÀ°¹çÀ­¤¬Êݤ¿¤ì¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£Î㤨¤Ð¡¢1 ³¬ÁØÌܤÎ
+     Íդοô¤ÏºÇÂç 2 ¤Ç¤¢¤ê¡¢¤³¤Î¤È¤­²¼°Ì¤Î³¬ÁؤÎÍդοô¤Ï 0 ¤Ç¤¢¤ë¡£³ÆÀá
+     ¤Ïɬ¤ºÀᤫÍÕ¤ò»ý¤Ä¡£¤Ê¤É¡£
+
+¸å¤Ç½èÍý¤ò²òÀϤ¹¤ëºÝ¤Ë¤³¤ÎÊÕ¤ê¤ò³Îǧ¤·¤è¤¦¡£
+¤Ê¤ª¡¢1 ÅÀÌܤˤĤ¤¤Æ¤ÏÁ°½Ò¤ÎÄ̤ê t_len ¤ÎÆɤ߹þ¤ß»þ¤Ë¥Á¥§¥Ã¥¯¤Ç¤­¤ë¡£
+2 ÅÀÌܤˤĤ¤¤Æ¤Ï¼ÂÁõ¤Ç¤ÏÈó¾ï¤Ë¤¦¤Þ¤¤ÊýË¡¤Ç¥Á¥§¥Ã¥¯¤·¤Æ¤¤¤ë¡£
+
+³¤¤¤Æ c_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È¤Ë¤Ä¤¤¤Æ¹Í¤¨¤ë¡£
+
+----------------------------------------------------------------------------
+< c_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È >
+
+             0       CBIT{9}
+             +-------+-----------+-----------+--   --+-----------+
+             |   n   |  c_len[0] |  c_len[1] | ...     c_len[n-1]|
+             +-------+-----------+-----------+--   --+-----------+
+
+c_len[i] == 0 ¤Î¾ì¹ç
+
+ 0 ¤¬Â³¤¯¿ô¤ò count ¤È¤¹¤ë¤È¡¢
+
+ count == 1 ¤Î¾ì¹ç
+
+                t_len[0]
+              <---------->
+             +------------+
+             |  t_code[0] |
+             +------------+
+
+ count == 2 ¤Î¾ì¹ç
+
+                t_len[0]     t_len[0]
+              <----------> <---------->
+             +------------+------------+
+             |  t_code[0] |  t_code[0] |
+             +------------+------------+
+
+ count == 3..18 ¤Î¾ì¹ç
+
+                t_len[1]    4 bit
+              <----------> <------>
+             +------------+-------+
+             |  t_code[1] |count-3|
+             +------------+-------+
+
+ count == 19 ¤Î¾ì¹ç
+
+                 t_len[0]    t_len[1]    4 bit
+              <----------> <----------> <------>
+             +------------+------------+-------+
+             |  t_code[0] |  t_code[1] |count-3|
+             +------------+------------+-------+
+
+  count >= 20 ¤Î¾ì¹ç
+
+                 t_len[2]    CBIT{9}
+              <----------> <------>
+             +------------+--------+
+             |  t_code[2] |count-20|
+             +------------+--------+
+
+c_len[i] > 0 ¤Î¾ì¹ç
+
+               t_len[c_len[i]+2]
+              <----------------->
+             +-------------------+
+             | t_code[c_len[i]+2]|
+             +-------------------+
+
+c_len[n...NC] ¤Ï¡¢0 ¤È¤Ê¤ë¡£
+
+----------------------------------------------------------------------------
+
+(8)
+c_len ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È¤ÎÀèƬ CBIT{9} ¤Ï 0 ... 2^9(512) ¤ÎÈϰϤÎÃͤò
+³ÊǼ¤Ç¤­¤ë¤¬ c_len ¤ÎÎΰ襵¥¤¥º¤Ï NC{510} ¤Ê¤Î¤Ç 0..510 ¤ÎÈϰϤòĶ¤¨¤ë
+¾ì¹ç¤Ï ÉÔÀµ¤ÈȽÃǤ·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
+
+(9)
+¤Þ¤¿¡¢
+ count >= 20 ¤Î¾ì¹ç
+ count == 3..18 ¤Î¾ì¹ç
+
+¤Î¤½¤ì¤¾¤ì¤Î·Á¼°¤Ë¤ª¤¤¤Æ count ¤Î¿ô¤À¤± c_len[i] ¤Ï 0 ¤¬Â³¤¯¤¬¤³¤ì¤¬
+c_len ¤Î*»Ä¤ê*¥µ¥¤¥º¤ò±Û¤¨¤ë¾ì¹ç¤âÉÔÀµ¤Ç¤¢¤ë¡£
+
+(10)
+¤µ¤é¤Ë¡¢c_len[i] > 0 ¤Î¾ì¹ç¤Î·Á¼°¤Ë¤ª¤¤¤Æ¡¢t_len[x] ¤òÉü¹æ¤·¤¿·ë²Ì¤¬
+c_len[i]{x}+2 ¤ÎÃͤǤ¢¤êc_len[i] ¤ÎÃͤϥϥեޥóÉä¹æĹ¤Ê¤Î¤Ç 0 .. 16 ¤Î
+ÈϰϤǤʤ±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£¤³¤ì¤Ï¡¢c_len, p_len ¤ÈƱ¤¸¤¯ t_len ¤Î¥Ï¥Õ¥Þ¥ó
+Ìڤι½ÃÛ¤ÎÃʳ¬¤ÇÉÔÀµ¤ÊÉü¹æ¸ì¤òÊÖ¤µ¤Ê¤¤¤è¤¦¤Ë¤·¤Æ¤¤¤ì¤Ð¤è¤¤¡£
+
+(11)
+¤â¤Á¤í¤ó¡¢t_len ¤Î¤È¤­¤ÈƱÍÍ c_len ¤òÆɤ߹þ¤ó¤À¸å¤Ë¹½ÃÛ¤·¤¿ Huffman ÌÚ
+¤Ï Huffman ÌڤȤ·¤ÆÀ°¹çÀ­¤¬Êݤ¿¤ì¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
+
+³¤¤¤Æ p_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È¤Ë¤Ä¤¤¤Æ¹Í¤¨¤ë¡£
+
+----------------------------------------------------------------------------
+< p_len[] ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È >
+
+             0      pbit{4 or 5}
+             +-------+-----------+-----------+--   --+-----------+
+             |   n   |  p_len[0] |  p_len[1] | ...     p_len[n-1]|
+             +-------+-----------+-----------+--   --+-----------+
+
+p_len[i] <= 6 ¤Î¾ì¹ç
+
+              0     3bit
+              +-----+
+    p_len[i]  | | | |
+              +-----+
+
+p_len[i] >= 7 ¤Î¾ì¹ç
+
+              0              p_len[i] - 3
+              +----------------+
+    p_len[i]  |1 1 1 1 ... 1 0 |
+              +----------------+
+
+p_len[n...np] ¤Ï¡¢0 ¤È¤Ê¤ë¡£
+
+----------------------------------------------------------------------------
+
+(12)
+p_len ¤Î½ÐÎÏ¥Õ¥©¡¼¥Þ¥Ã¥È¤ÎÀèƬ pbit{4 or 5} ¤Ï 0 ... 2^4{16} or
+2^5{32} ¤ÎÈϰϤÎÃͤò³ÊǼ¤Ç¤­¤ë¤¬ p_len ¤ÎÎΰ襵¥¤¥º¤Ï np{14..17} ¤Ê¤Î¤Ç
+0..np ¤ÎÈϰϤòĶ¤¨¤ë¾ì¹ç¤ÏÉÔÀµ¤ÈȽÃǤ·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
+
+¤È¤³¤í¤ÇÉü½¬¤Ë¤Ê¤ë¤¬ np ¤Ï¡¢³Æ°µ½Ì¥á¥½¥Ã¥É¤Î¼­½ñ¤Î¥µ¥¤¥º¤Ç·è¤Þ¤ë¡£Âбþ
+¤ò°Ê²¼¤ËºÆ·Ç¤¹¤ë¤Î¤Ç³Îǧ¤·¤Æ¤Û¤·¤¤¡£(-lh4- ¤Î¾ì¹ç¤Î np ¤Ï¤Ê¤¼¤« 13 ¤Ç¤Ï
+¤Ê¤¯14 ¤È¤Ê¤Ã¤Æ¤¤¤ë¡£¤ª¤½¤é¤¯¡¢LHA ¤¬¼ÂÁõ¤µ¤ì¤¿Åö»þ -lh6-, -lh7- ¤Ï¸ºß
+¤»¤º np ¤ä pbit ¤Ï¸ÇÄêÃÍ(Äê¿ô NP, PBIT)¤Ç¤¢¤Ã¤¿¤¿¤á¡¢-lh4-, -lh5- ¤Îξ
+Êý¤ËÂбþ¤Ç¤­¤ë¤è¤¦ÊÑ¿ô¤ÎÎΰ襵¥¤¥º¤ò¹ç¤ï¤»¤¿¤À¤±¤Ç¤¢¤ë¤È»×¤¦¡£¤Ä¤Þ¤ê¡¢
+°µ½Ì½èÍý¤Ë¤ª¤¤¤Æ¤Ï¡¢-lh4- ¤Î np ¤ò 13 ¤ÈÁÛÄꤷ¤Æ¤âÌäÂê¤ÏȯÀ¸¤·¤Ê¤¤¤È»×
+¤ï¤ì¤ë¡£µÕ¤ËÉü¹æ½èÍý¤Ë¤ª¤¤¤Æ¤Ï¡¢(gzip ¤Î¤è¤¦¤Ë)°µ½Ì method ¤Î¾ðÊó¤¬ÅϤµ
+¤ì¤Ê¤¤¾ì¹ç¤Ï np ¤ò 14 ¤È¤¹¤ë¤·¤«¤Ê¤¤¡£¤Ê¤ª¡¢¤³¤Î¤è¤¦¤Ê(gzip ¤Î¤è¤¦¤Ê)
+¾ì¹ç -lh6,7- ¤Ø¤ÎÂбþ¤Ï¤Ç¤­¤Ê¤¤¡£ºÇ½é¤Î pbit ʬ¤ÎÍ×ÁÇ¿ô¤ÎÆɤ߹þ¤ß¤Ç 4
+¥Ó¥Ã¥ÈÆɤá¤Ð¤è¤¤¤Î¤« 5 ¥Ó¥Ã¥ÈÆɤá¤Ð¤è¤¤¤Î¤«¤¬¤ï¤«¤é¤Ê¤¤¤«¤é¤Ç¤¢¤ë)
+
+        method  maxmatch  dicsiz   dicbit   np(dicbit+1) pbit
+        -----------------------------------------------------------
+        -lh4-        256  2^12     12       14 (or 13?)  4 (14<2^4)
+        -lh5-        256  2^13     13       14           4 (14<2^4)
+        -lh6-        256  2^15     15       16           5 (16<2^5)
+        -lh7-        256  2^16     16       17           5 (17<2^5)
+
+(13)
+¤Þ¤¿¡¢t_len ¤ÈƱÍͤˡ¢p_len[i] >= 7 ¤Î·Á¼°¤Ç¤Ï¡¢1 ¤¬ 12 bit ¤è¤ê¿¤¯Ï¢
+³¤·¤¿¾ì¹ç¤ËÉÔÀµ¤Ç¤¢¤ë¡£
+
+(14)
+¤â¤Á¤í¤ó¡¢p_len[] ¤òÆɤ߹þ¤ó¤À¸å¤Ë¹½ÃÛ¤·¤¿ Huffman ÌÚ¤ÎÀ°¹çÀ­¤¬Êݤ¿¤ì¤Ê
+¤±¤ì¤Ð¤Ê¤é¤Ê¤¤ÅÀ¤Ï¾¤Î Huffman ÌÚ¤ÈƱ¤¸¤À¡£
+
+¤Ç¤Ï¡¢¼ÂºÝ¤ËÉü¹æ½èÍý¤Î¥»¥­¥å¥ê¥Æ¥£Âбþ¤ò¹Ô¤Ã¤¿¥½¡¼¥¹¤ò´ð¤Ë¼ÂÁõ¤ò³Îǧ¤·¤è¤¦¡£
+
+\f
+°Ê²¼¤Ï¡¢
+
+    https://bugzilla.redhat.com/show_bug.cgi?id=204676
+
+¤Ë¤Æ·ÇºÜ¤µ¤ì¤¿¥Ñ¥Ã¥Á¤¢¤ë¡£¤³¤Î¥Ñ¥Ã¥Á¤Ï gzip ÍѤΥѥåÁ¤Ç¤¢¤Ã¤¿¤¬ÆâÍƤÏ
+¤Û¤È¤ó¤ÉƱ¤¸¤Ç¤¢¤ë¡£(gzip ¤Ï LHA ¤È¤Û¤È¤ó¤ÉƱ¤¸Éü¹æ½èÍý¤Î¥½¡¼¥¹¤ò´Þ¤ó¤Ç
+¤ª¤ê¡¢LHA ¤Î°µ½Ì·Á¼°¤òÉü¹æ¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£¤¿¤À¡¢LHA ¥Ø¥Ã¥À¤òÆɤळ¤È
+¤Ï¤Ç¤­¤Ê¤¤¤¿¤á lzh ¥Õ¥¡¥¤¥ë¤òŸ³«¤Ç¤­¤ë¤ï¤±¤Ç¤Ï¤Ê¤¤¡£¸«¤¿¤È¤³¤í
+-lh4,lh5- ¤Ë¤Î¤ßÂбþ¤·¤Æ¤¤¤ë¡£)
+
+diff -ru gzip-1.3.5.orig/unlzh.c gzip-1.3.5/unlzh.c
+--- gzip-1.3.5.orig/unlzh.c     1999-10-06 06:00:00.000000000 +0100
++++ gzip-1.3.5/unlzh.c  2006-08-18 22:56:19.446997000 +0100
+@@ -149,13 +149,17 @@
+     unsigned i, k, len, ch, jutbits, avail, nextcode, mask;
+
+     for (i = 1; i <= 16; i++) count[i] = 0;
+-    for (i = 0; i < (unsigned)nchar; i++) count[bitlen[i]]++;
++    for (i = 0; i < (unsigned)nchar; i++) {
++        if (bitlen[i] > 16)
++        error("Bad table (case a)\n");
++        else count[bitlen[i]]++;
++    }
+
+bitlen ¤Ï¡¢c_len, p_len, t_len ¤Ç¤¢¤ê¡¢¤¤¤º¤ì¤Î Huffman ÌÚ¤âºÇÂç¤Î³¬ÁØ
+¤Ï 16 ¤Þ¤Ç¤Ç¤¢¤ë¤«¤é¤½¤ÎÈϰϤòĶ¤¨¤¿¤â¤Î¤¬¤Ê¤¤¤«¥Á¥§¥Ã¥¯¤·¤Æ¤¤¤ë¡£¤³¤ì
+¤Ï¡¢¥»¥­¥å¥ê¥Æ¥£¥Ð¥°¤Î½ÅÍפʲþ½¤ÅÀ¤Î£±ÅÀÌܤǤ¢¤ë¡£
+
+     start[1] = 0;
+     for (i = 1; i <= 16; i++)
+        start[i + 1] = start[i] + (count[i] << (16 - i));
+-    if ((start[17] & 0xffff) != 0)
+-       error("Bad table\n");
++    if ((start[17] & 0xffff) != 0 || tablebits > 16) /* 16 for weight below */
++       error("Bad table (case b)\n");
+
+     jutbits = 16 - tablebits;
+     for (i = 1; i <= (unsigned)tablebits; i++) {
+
+tablebits ¤Ï¡¢make_table() ¤ò¸Æ¤Ó½Ð¤¹¤È¤­¤Ë»ØÄꤹ¤ë°ú¿ô¤Ç°Ê²¼¤ÎÄ̤ê¸ÇÄê
+ÃÍ(8 or 12)¤Ç¤¢¤ë¡£½¾¤Ã¤Æɬ¤º¤·¤âɬÍפǤϤʤ¤¡£(¤¢¤¨¤Æ¥Á¥§¥Ã¥¯¤¹¤ë¤Ê¤é
+Bad table ¤Ç¤Ê¤¯ Bug ¤Èɽ¼¨¤¹¤ë¤Ù¤­¤À¤í¤¦)
+
+    make_table(nn, pt_len, 8, pt_table);
+    make_table(NC, c_len, 12, c_table);
+
+total & 0xffff ¤Ï¤É¤ÎÄøÅÙ¤ÎÉÔÀµ¥Æ¡¼¥Ö¥ë¤ò¸¡½Ð¤¹¤ë¤Î¤À¤í¤¦¤«¡©
+³ºÅö¤Î½èÍý¤ò°Ê²¼¤Ë¼¨¤½¤¦¡£
+
+    for (i = 1; i <= 16; i++) count[i] = 0;
+    for (i = 0; i < (unsigned)nchar; i++) count[bitlen[i]]++;
+
+    start[1] = 0;
+    for (i = 1; i <= 16; i++)
+       start[i + 1] = start[i] + (count[i] << (16 - i));
+    if ((start[17] & 0xffff) != 0)
+       error("Bad table\n");
+
+¤³¤ì¤Ï¡¢LHa for UNIX ¤Ç°Ê²¼¤Î¤è¤¦¤Ë½ñ¤«¤ì¤Æ¤¤¤¿Éôʬ¤Ç¤¢¤ê¡¢¥í¥¸¥Ã¥¯¤È¤·
+¤Æ¤Ï¤Þ¤Ã¤¿¤¯°ì½ï¤Ç¤¢¤ë¡£
+
+    /* (A) */
+    avail = nchar;
+
+    /* initialize */
+    for (i = 1; i <= 16; i++) {
+        count[i] = 0;
+        weight[i] = 1 << (16 - i);
+    }
+
+    /* (B) */
+    /* count */
+    for (i = 0; i < nchar; i++)
+        count[bitlen[i]]++;
+
+    /* (C) */
+    /* calculate first code */
+    total = 0;
+    for (i = 1; i <= 16; i++) {
+        start[i] = total;
+        total += weight[i] * count[i];
+    }
+    if ((total & 0xffff) != 0)
+        error("make_table()", "Bad table (5)\n");
+
+Î㤨¤Ð¡¢°Ê²¼¤Î Huffman ÌڤǤϳƳ¬ÁØ¤Î½Å¤ß weight ¤ÎÃÍ(gzip ¤Î¥½¡¼¥¹¤Ç¡¢
+(16 - i)¤ÎÃÍ)¤Ï
+
+       /\
+      a /\              weight[1] = 0x8000
+        b c             weight[2] = 0x4000
+
+¤Ç¤¢¤ê¡¢Íդοô¤Ë½Å¤ß¤ò¤«¤±¤¿ÃͤÎÁíϤÏ
+
+0x10000
+
+¤È¤Ê¤ë¡£¤³¤ì¤ÏÀµ¤·¤¤ Huffman ÌڤˤĤ¤¤Æɬ¤ºÀ®¤êΩ¤¿¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤É¬Í×
+½½Ê¬¾ò·ï¤Ç¤¢¤ë¡£
+
+¤·¤«¤·¡¢´û¸¤Î½èÍý¤Ç¤ÏÎ㤨¤Ð 1 ³¬ÁØÌܤÎÍդοô¤¬ 4 ¤Ç¤¢¤ë¾ì¹ç¤Ë total ¤¬
+0x20000 ¤È¤Ê¤ê 0xffff ¤È¤ÎÏÀÍýÀѤǤϰ۾ï¤ò¸¡ÃΤǤ­¤Ê¤¤¡£
+
+¤³¤³¤Ï¡¢°Ê²¼¤Î¤è¤¦¤Ë¤¹¤ë¤Ù¤­¤Ç¤¢¤í¤¦(°Ê²¼¤Ï¡¢LHa for UNIX¤Î¥½¡¼¥¹)¡£
+
+    /* (C) */
+    /* calculate first code */
+    total = 0;
+    for (i = 1; i <= 16; i++) {
+        start[i] = total;
+        total += weight[i] * count[i];
+        if (total > 0x10000)
+            error("make_table()", "Bad table\n");
+    }
+    if (total != 0x10000)
+        error("make_table()", "Bad table (5)\n");
+
+¥ë¡¼¥×¤ÎÃæ¤Ë total ¤Î¥Á¥§¥Ã¥¯¤òÆþ¤ì¤Æ¤¤¤ë¤Î¤ÏÇ°¤Î¤¿¤á¤Ç¤¢¤ë¡£¤â¤Á¤í¤ó¡¢
+total ¤ÎÊÑ¿ô¤Î¥µ¥¤¥º¤Ï 16 bit ¤Ç¤Ï­¤ê¤Ê¤¤¤Î¤Ç 32 bit À°¿ô¤Ë¤¹¤ëɬÍפ¬
+¤¢¤ë¡£(gzip ¤Î¥½¡¼¥¹¤Ç¤Ï¡¢total ÊÑ¿ô¤ÎÂå¤ï¤ê¤Ë start[17] ¤¬»È¤ï¤ì¤Æ¤¤¤ë
+¤Î¤Ç¡¢LHa for UNIX ¤Î¤è¤¦¤Ë total ÊÑ¿ô¤Ë¤¹¤ë¤«¡¢start[] ¼«ÂΤò 32 bit
+À°¿ô¤ËÊѤ¨¤ëɬÍפ¬¤¢¤ë¡£)
+
+¤Ê¤ª¡¢32 bit À°¿ô¤Ë¤·¤¿¾ì¹ç¤Ç¤â¡¢count[1] ¤¬ 0x20000 ¤ÎÃͰʾå¤Ç¤¢¤ë¤È¤­
+total ¤¬¥ª¡¼¥Ð¡¼¥Õ¥í¡¼¤¹¤ë¶²¤ì¤¬¤¢¤ë¤¬°Ê²¼¤Î½èÍý¤è¤ê count[] ¤¬nchar ¤è
+¤êÂ礭¤¯¤Ê¤ë¤³¤È¤Ï¤Ê¤¤¡£
+
+    /* (B) */
+    /* count */
+    for (i = 0; i < nchar; i++)
+        count[bitlen[i]]++;
+
+¤½¤·¤Æ¡¢Í×ÁÇ¿ô¤¬ºÇ¤âÂ礭¤¤ c_len ¤Î¾ì¹ç¤Ç nchar ¤Ï NC{510} ¤Ç¤¢¤ë¤«¤é
+32 bit À°¿ô¤ÎÈϰϤò¥ª¡¼¥Ð¡¼¤¹¤ë¤³¤È¤Ï¤Ê¤¤¤À¤í¤¦¡£¤³¤Î¤³¤È¤¬¤Ï¤Ã¤­¤ê¤·¤Æ
+¤¤¤ì¤Ð¥ë¡¼¥×Ãæ¤ËÆþ¤ì¤¿
+
+        if (total > 0x10000)
+            error("make_table()", "Bad table (5)\n");
+
+¤Ïɬ¤º¤·¤âɬÍפǤϤʤ¤¡£¤¢¤ë¤¤¤Ï¡¢³¬ÁØ n ¤ÎÍդοô¤¬ 2^n ¤ò±Û¤¨¤Ê¤¤¤³¤È¤Î
+¥Á¥§¥Ã¥¯¤ËÊѤ¨¤Æ¤âÎɤ¤¤À¤í¤¦¡£
+
+    /* (C) */
+    /* calculate first code */
+    total = 0;
+    for (i = 1; i <= 16; i++) {
+        if (count[i] > (1<<i))
+            error("make_table()", "Bad table\n");
+        start[i] = total;
+        total += weight[i] * count[i];
+    }
+    if (total != 0x10000)
+        error("make_table()", "Bad table (5)\n");
+
+¤³¤ì¤Ê¤é¤Ð¡¢total ¤ÏºÇÂç¤Ç¤â 16 * 0x10000 = 0x100000 ¤Ë¤·¤«¤Ê¤é¤Ê¤¤¤³¤È
+¤¬Êݾڤµ¤ì¤ë¡£
+
+@@ -169,15 +173,15 @@
+
+     i = start[tablebits + 1] >> jutbits;
+     if (i != 0) {
+-       k = 1 << tablebits;
+-       while (i != k) table[i++] = 0;
++       k = MIN(1 << tablebits, DIST_BUFSIZE);
++       while (i < k) table[i++] = 0;
+     }
+
+tablebits ¤Ï¸ÇÄêÃͤʤΤǡ¢É¬¤º¤·¤â¤³¤Î¥Á¥§¥Ã¥¯¤ÏɬÍפǤϤʤ¤¡£
+
+     avail = nchar;
+     mask = (unsigned) 1 << (15 - tablebits);
+     for (ch = 0; ch < (unsigned)nchar; ch++) {
+        if ((len = bitlen[ch]) == 0) continue;
+-       nextcode = start[len] + weight[len];
++       nextcode = MIN(start[len] + weight[len], DIST_BUFSIZE);
+        if (len <= (unsigned)tablebits) {
+            for (i = start[len]; i < nextcode; i++) table[i] = ch;
+        } else {
+
+DIST_BUFSIZE ¤Ï¡¢c_table[] ¤Î¥Ð¥Ã¥Õ¥¡¥µ¥¤¥º¤Ç 1<<12 ¤Ç¤¢¤ë¡£nextcode ¤Ï¡¢
+LHa for UNIX ¤Ç¤Î³ºÅöÊÑ¿ô¤Ï l ¤Ç¡¢Huffman Éä¹æ¤Î(ÀèƬ tablebits ¥Ó¥Ã¥È
+¤Î)¼è¤êÆÀ¤ëºÇÂçÃͤǤ¢¤ë¡£¤³¤ì¤Ï¡¢ÍýÏÀ¾å
+
+             tablebits  ºÇÂç¤Î Huffman Éä¹æ    m
+    c_len    12         1111 1111 1111{4095}   4
+    p_len     8              1111 1111{255}    8
+    t_len     8              1111 1111{255}    8
+
+¤Ç¤¢¤ê¡¢¥ë¡¼¥×æ½Ð¾ò·ï¤¬ÉÔÀµ¤Ç¤Ê¤¤¸Â¤ê¡¢¤³¤Î¥Á¥§¥Ã¥¯¤ÏÉÔÍפǤ¢¤ë¤È»×¤ï
+¤ì¤ë¡£(¤½¤â¤½¤â¡¢Ç°¤Î¤¿¤á¤È¤¤¤¦°ÕÌ£¤Ç¥Á¥§¥Ã¥¯¤·¤Æ¤¤¤ë¤Î¤Ê¤é c_len ¤Î¾ì
+¹ç¤À¤±¤·¤«¹Íθ¤·¤Æ¤Ê¤¤¤Î¤âÊѤǤ¢¤ë)
+
+¤¿¤À¤·¡¢Àè¤Û¤É¤Î total ¥Á¥§¥Ã¥¯¤¬ÉÔ´°Á´¤Ê¤Þ¤Þ¤À¤È start[] ¤ÎÃͤ¬
+ÉÔÀµ¤Ë¤Ê¤ê¤¦¤ë¤¿¤á¡¢Ïä¬ÊѤï¤Ã¤Æ¤¯¤ë¡£
+¤½¤¦¤¤¤¦¤ï¤±¤Ç¡¢¤³¤ì¤Ï¥»¥­¥å¥ê¥Æ¥£¥Ð¥°¤Î½ÅÍפʲþ½¤ÅÀ¤Î£²ÅÀÌܤȤʤ뤬¡¢
+ËÜÅö¤Ï total ¤Î¥Á¥§¥Ã¥¯¤ÎÊý¤¬½ÅÍפǤ¢¤ë¡£
+
+¤µ¤é¤Ë¡¢ÌڤηÁ¤¬Àµ¤·¤¯¤Æ¤â
+
+  Éü¹æ¸ì¤Î¼ïÎà¿ô < Íդοô
+
+¤Ç¤¢¤ë¾ì¹ç¡¢ÍÕ¤ËÃͤ¬³ä¤êÅö¤Æ¤é¤ì¤Ê¤¤»Þ¤¬È¯À¸¤·¤Æ¤·¤Þ¤¦¡£¤³¤ì¤â¥Á¥§¥Ã¥¯
+¤·¤Æ¤ª¤¤¤¿Êý¤¬Îɤ¤¤À¤í¤¦¡£Éü¹æ¸ì¤Î¿ô¤Ï nchar ¤ÇÍդοô¤Ï count[] ¤ÎÁíÏÂ
+¤Ç¤¢¤ë¤«¤é
+
+    /* (B) */
+    /* count */
+    for (i = 0; i < nchar; i++)
+        count[bitlen[i]]++;
+
+¤è¤ê¡¢¤³¤Î¤³¤È¤ÏÊݾڤµ¤ì¤Æ¤¤¤ë¤è¤¦¤À(i >= nchar ¤Ç¤¢¤ë bitlen[i] ¤¬ÀßÄê
+¤µ¤ì¤Æ¤¤¤Æ¤â»È¤ï¤ì¤Ê¤¤¡£¤â¤Á¤í¤óÀßÄꤵ¤ì¤¿»þÅÀ¤Ç¡¢¥¨¥é¡¼¤ò¸¡½Ð¤¹¤ëÊý¤¬
+˾¤Þ¤·¤¤¤È¤Ï»×¤¦)
+
+@@ -218,7 +222,7 @@
+        for (i = 0; i < 256; i++) pt_table[i] = c;
+     } else {
+        i = 0;
+-       while (i < n) {
++       while (i < MIN(n,NPT)) {
+            c = bitbuf >> (BITBUFSIZ - 3);
+            if (c == 7) {
+                mask = (unsigned) 1 << (BITBUFSIZ - 1 - 3);
+
+n ¤¬ t_len¡¢p_len ¤ÎÎΰè¤ÎÈÏ°ÏÆâ¤ÎÃͤȤϸ¤é¤Ê¤¤¤Î¤Ç¤½¤Î¥Á¥§¥Ã¥¯¤ò¹Ô¤Ã
+¤Æ¤¤¤ë¡£¤³¤ì¤Ï¡¢¥»¥­¥å¥ê¥Æ¥£¥Ð¥°¤Î½ÅÍפʲþ½¤ÅÀ¤Î£³ÅÀÌܤǤ¢¤ë¡£
+
+µ¤¤Ë¤Ê¤ë¤Î¤Ï¡¢
+
+¡¦p_len, t_len ¤ÎÏÀÍýŪ¤ÊÎΰ襵¥¤¥º¤Ç¤Ê¤¯¼ÂÁõ¾å¤Î pt_len ¤ÎÎΰ襵¥¤¥º¤Ç
+  ¥Á¥§¥Ã¥¯¤·¤Æ¤¤¤ë¡£¤½¤Î¤¿¤á¡¢¥Ð¥Ã¥Õ¥¡¥ª¡¼¥Ð¡¼¥Õ¥í¡¼¤Î¥»¥­¥å¥ê¥Æ¥£Âкö
+  ¤È¤·¤Æ¤Ï½½Ê¬¤À¤¬¥¨¥é¡¼¥Á¥§¥Ã¥¯¤È¤·¤Æ¤ÏÉÔ´°Á´¤Ç¤¢¤ë(¥¨¥é¡¼¤Î¸¡½Ð¤¬ÃÙ±ä
+  ¤µ¤ì¤ë)¡£
+
+¡¦ÉÔÀµ¤ÊÃͤò¥¨¥é¡¼¤È¤»¤º¡£½èÍý¤òºÇÂçÃͤǷѳ¤·¤Æ¤¤¤ë¡£¤½¤Î¤¿¤á¡¢°Ê²¼Æ±Ê¸¡£
+
+@@ -228,7 +232,7 @@
+            pt_len[i++] = c;
+            if (i == i_special) {
+                c = getbits(2);
+-               while (--c >= 0) pt_len[i++] = 0;
++               while (--c >= 0 && i < NPT) pt_len[i++] = 0;
+            }
+        }
+        while (i < nn) pt_len[i++] = 0;
+
+i_special ¤Ï 3 ¸ÇÄê¤Ê¤Î¤Ç¡¢¤³¤Î¥Á¥§¥Ã¥¯¤Ïɬ¤º¤·¤âɬÍפȤ¤¤¦¤ï¤±¤Ç¤Ï¤Ê¤¤¡£
+(¸·Ì©¤Ë¤Ï¡¢¼ÂÁõ¾å i_special ¤¬ -1 ¤Ç¤¢¤ë¾ì¹ç¤¬¤¢¤ë¤¬ i ¤¬ -1 ¤Ë¤Ê¤Ã¤¿»þ
+ÅÀ¤Ç¥Ð¥°¤Ç¤¢¤ê¡¢¤½¤Î¿´ÇۤϤʤµ¤½¤¦¤À)
+
+@@ -248,7 +252,7 @@
+        for (i = 0; i < 4096; i++) c_table[i] = c;
+     } else {
+        i = 0;
+-       while (i < n) {
++       while (i < MIN(n,NC)) {
+            c = pt_table[bitbuf >> (BITBUFSIZ - 8)];
+            if (c >= NT) {
+                mask = (unsigned) 1 << (BITBUFSIZ - 1 - 8);
+
+n ¤¬ c_len ¤ÎÎΰè¤ÎÈÏ°ÏÆâ¤ÎÃͤȤϸ¤é¤Ê¤¤¤Î¤Ç¡¢Æ±¾å¡£
+
+@@ -256,14 +260,14 @@
+                    if (bitbuf & mask) c = right[c];
+                    else               c = left [c];
+                    mask >>= 1;
+-               } while (c >= NT);
++               } while (c >= NT && (mask || c != left[c]));
+            }
+
+¤³¤Î¥ë¡¼¥×Éôʬ¤ÎÁ´ÂΤϥѥåÁÁ°¤À¤È¡¢
+
+           c = pt_table[bitbuf >> (BITBUFSIZ - 8)];
+           if (c >= NT) {
+               mask = (unsigned) 1 << (BITBUFSIZ - 1 - 8);
+               do {
+                   if (bitbuf & mask) c = right[c];
+                   else               c = left [c];
+                   mask >>= 1;
+               } while (c >= NT);
+           }
+           fillbuf((int) pt_len[c]);
+
+¤È¤Ê¤Ã¤Æ¤ª¤ê¡¢
+
+  mask == 0 && c == left[c]
+
+¤Î¾ò·ï¤òËþ¤¿¤·¤Æ¤·¤Þ¤¦¤è¤¦¤ÊÉÔÀµ¤ÊÌÚ¤¬¹½ÃÛ¤µ¤ì¤Æ¤¤¤ë¤È c ¤ÎÃͤÏÊѲ½¤»¤º
+¤¤¤Ä¤Þ¤Ç¤â¥ë¡¼¥×¤·Â³¤±¤ë¤³¤È¤Ë¤Ê¤Ã¤Æ¤·¤Þ¤¦¡£¤½¤³¤Ç¡¢¤³¤Î¾ò·ï¤¬È¯À¸¤·¤¿
+¤È¤­¤Ë¤¹¤°¤Ë¥ë¡¼¥×¤òæ½Ð¤¹¤ë¤è¤¦¤½¤Î¾ò·ï¤ÎÈÝÄê¤Ç¤¢¤ë
+
+  !(mask == 0 && c == left[c])
+
+¤Ä¤Þ¤ê¤Ï¡¢
+
+  (mask || c != left[c])
+
+¤ò¥ë¡¼¥×·Ñ³¤Î while ¾ò·ï¤Ë²Ã¤¨¤Æ¤¤¤ë¤è¤¦¤À¡£¤·¤«¤·¡¢mask ¤Î½é´üÃͤÏ
+
+  1 << (BITBUFSIZ{16} - 1 - 8) {0000 0000 1000 0000}
+
+¤Ç¤¢¤ê¥ë¡¼¥×Ëè¤Ë
+
+  mask >>= 1;
+
+¤·¤Æ¤¤¤ë¤Î¤À¤«¤é¡¢mask == 0 ¤Ë¤Ê¤Ã¤¿»þÅÀ¤Ç¡¢8 bit(ºÇ½é¤Îɽ°ú¤­¤È¹ç¤ï¤»
+¤Æ 16 bit)¤Î Huffman Éä¹æ¤òÆɤ߹þ¤ó¤Ç¤ª¤ê(¤¯¤É¤¤¤«¤âÃΤì¤Ê¤¤¤¬ LHA ¤Ë¤ª
+¤±¤ë Huffman Ìڤγ¬ÁؤϺÇÂç 16)¡¢mask == 0 ¤òæ½Ð¾ò·ï¤Ë²Ã¤¨¤ë¤À¤±¤ÇÎɤ¤
+¤È»×¤¦¡£
+
+¤â¤Á¤í¤ó¡¢17 bit ¤ÎÉä¹æ¤òÆɤ߹þ¤ó¤À»þÅÀ¤ÇÉÔÀµ¤Ê¤Î¤À¤«¤é
+
+               mask = (unsigned) 1 << (BITBUFSIZ - 1 - 8);
+               do {
+                    if (mask == 0) error("....");
+
+                   if (bitbuf & mask) c = right[c];
+                   else               c = left [c];
+                   mask >>= 1;
+               } while (c >= NT);
+
+¤È°Û¾ï½ªÎ»¤·¤Æ¤âÌäÂê¤Ê¤¤¤È»×¤¦¡£°Ê²¼¤Î¤è¤¦¤Ë for ¤Ç½ñ¤¯¤³¤È¤â¤Ç¤­¤ë¤¬¤Þ
+¤¢·ë¶É¤ÏƱ¤¸¤³¤È¤À¡£(¤³¤¦¤¹¤ë¤È¸«¤ä¤¹¤¤¤À¤í¤¦¤«¡©¤È¹Í¤¨¤Æ¤ß¤¿¤À¤±¤Ç¤¢¤ë
+¤¬¡¢Æä˸ú²Ì¤Ï¤Ê¤¤¤è¤¦¤À¡£)
+
+                for (mask = 1 <<(BITBUFSIZ-1-8); mask != 0; mask >>= 1) {
+                    if (bitbuf & mask) c = right[c];
+                    else               c = left[c];
+
+                    if (c < NT) break;
+                }
+                if (mask == 0) error(...);
+
+¤·¤«¤· c ¤ÎÃÍ¤È left[], right[] ¤ÎÎΰ襵¥¤¥º¤È¤ÎÈæ³Ó¤ÏÎɤ¤¤Î¤À¤í¤¦¤«¡©
+¡ÊÍýÏÀ¾å¤Ï Huffman Ìڤι½ÃÛ»þ¤Ë¥Á¥§¥Ã¥¯¤µ¤ì¤Æ¤¤¤ì¤ÐÌäÂê¤Ê¤¤¤Î¤Ç¡¢»ä¤ÏÌä
+Âê¤Ê¤¤¤È»×¤¦¤Î¤À¤¬¡¢¤½¤ì¤ò¸À¤¦¤È¤½¤â¤½¤â̵¸Â¥ë¡¼¥×¤Î¥Á¥§¥Ã¥¯¤âÉÔÍפǤ¢
+¤ë¤È»×¤¦¡£)
+
+            fillbuf((int) pt_len[c]);
+            if (c <= 2) {
+                if      (c == 0) c = 1;
+                else if (c == 1) c = getbits(4) + 3;
+                else             c = getbits(CBIT) + 20;
+-               while (--c >= 0) c_len[i++] = 0;
++               while (--c >= 0 && i < NC) c_len[i++] = 0;
+            } else c_len[i++] = c - 2;
+        }
+        while (i < NC) c_len[i++] = 0;
+
+c_len[] ¤ÎÈϰϳ°¤ÎÎΰè¤ËÃͤ¬ÀßÄꤵ¤ì¤Ê¤¤¤è¤¦¥Á¥§¥Ã¥¯¤·¤Æ¤¤¤ë¡£¤·¤«¤·¡¢
+¤ä¤Ï¤ê¥¨¥é¡¼¤È¤·¤Æ¸¡½Ð¤»¤º¤Ë½èÍý¤ò³¹Ô¤·¤Æ¤¤¤ë¡£
+
+@@ -292,7 +296,7 @@
+            if (bitbuf & mask) j = right[j];
+            else               j = left [j];
+            mask >>= 1;
+-       } while (j >= NC);
++       } while (j >= NC && (mask || j != left[j]));
+     }
+     fillbuf((int) c_len[j]);
+     return j;
+
+Ʊ¾å¡£
+
+@@ -309,7 +313,7 @@
+            if (bitbuf & mask) j = right[j];
+            else               j = left [j];
+            mask >>= 1;
+-       } while (j >= NP);
++       } while (j >= NP && (mask || j != left[j]));
+     }
+     fillbuf((int) pt_len[j]);
+     if (j != 0) j = ((unsigned) 1 << (j - 1)) + getbits((int) (j - 1));
+
+Ʊ¾å¡£
+
+@@ -356,7 +360,7 @@
+     while (--j >= 0) {
+        buffer[r] = buffer[i];
+        i = (i + 1) & (DICSIZ - 1);
+-       if (++r == count) return r;
++       if (++r >= count) return r;
+     }
+     for ( ; ; ) {
+        c = decode_c();
+@@ -366,14 +370,14 @@
+        }
+        if (c <= UCHAR_MAX) {
+            buffer[r] = c;
+-           if (++r == count) return r;
++           if (++r >= count) return r;
+        } else {
+            j = c - (UCHAR_MAX + 1 - THRESHOLD);
+            i = (r - decode_p() - 1) & (DICSIZ - 1);
+            while (--j >= 0) {
+                buffer[r] = buffer[i];
+                i = (i + 1) & (DICSIZ - 1);
+-               if (++r == count) return r;
++               if (++r >= count) return r;
+            }
+        }
+     }
+
+\f
+¤µ¤Æ¡¢¤³¤ì¤é¥»¥­¥å¥ê¥Æ¥£Âкö¤Ï¶ñÂÎŪ¤Ë¤É¤Î¤è¤¦¤Ê¾ì¹ç¤òÁÛÄꤷ¤Æ¤¤¤ë¤Î¤À
+¤í¤¦¡©
+
+https://bugzilla.redhat.com/show_bug.cgi?id=204676
+
+¤Ë¤Ï¡¢Ìڤι½ÃÛ¤¬ÉÔÀµ¤Ë¤Ê¤ë¥·¥Ê¥ê¥ª¤È¤·¤Æ°Ê²¼¤¬½ñ¤«¤ì¤Æ¤¤¤ë¡£
+
+>  * Construct a pt_len[] such that pt_len[n] is 0.
+>  * Construct a pt_table[] such that pt_table[(code buffer) >> 16 - 8]
+is n (where n>2)
+>  * Now c_len[] is filled with (n-2), generating exceptionally high values in
+>    count[n-2].
+
+¤·¤«¤·¡¢¤³¤ì¤òÆɤó¤Ç¤â¤è¤¯¤ï¤«¤é¤Ê¤«¤Ã¤¿¤Î¤Ç°ì½ï¤Ë·ÇºÜ¤µ¤ì¤Æ¤¤¤¿¥µ¥ó¥×
+¥ë¤ÎÉÔÀµ¤ÊÉä¹æ¤òÆɤó¤Ç¤ß¤¿¡£
+
+> perl -e 'print "\x1f\xa0","\xab\xcd","\xf6\x40\x01\xc2\xcc\x36\x0c\x92\x00\x00\x00\x00","\xc8","\x00"x"2048"' | gzip -d
+
+\x1f\xa0 ¤Ï¥Þ¥¸¥Ã¥¯¥Ê¥ó¥Ð¡¼¤Ç¡¢gzip ¤Ë¤ª¤±¤ë LHA ¤Î°µ½Ì·Á¼°¤ò¼¨¤¹¡£¤½¤·
+¤Æ¡¢LHA ¥Õ¥©¡¼¥Þ¥Ã¥È¤Ï¡¢\xab\xcd ¤«¤é»Ï¤Þ¤ë¡£¤³¤ì¤Ï¡¢blocksize ¤Ç¤¢¤ë¡£
+
+    blocksize = Oxabcd
+
+¤½¤·¤Æ¡¢t_len ¤Î½ÐÎÏ·Á¼°¤¬Â³¤¯¡£2 ¿Ê¿ô¤È¹ç¤ï¤»¤Æ²¼µ­¤Ë¼¨¤¹¡£
+
+    f6        40        01        c2        cc        36
+    1111 0110 0100 0000 0000 0001 1100 0010 1100 1100 0011 0110
+    <---->
+    size of t_len
+
+    0c        92        00        00        00        00
+    0000 1100 1001 0010 0000 0000 0000 0000 0000 0000 0000 0000,
+
+    c8         00
+    1100 1000, 0000 * 2048
+
+¤¤¤­¤Ê¤ê¡¢t_len ¤Î¥µ¥¤¥º¤¬ÉÔÀµ(1111 0=0x1e(30) > NT{19})¤Ç¤¢¤ë¡£¤½¤·¤Æ¡¢³Æ
+t_len[] ¤òÆɤ߹þ¤à¤È°Ê²¼¤Î¤è¤¦¤Ë¤Ê¤ë
+
+    t_len[ 0] = 110   :6
+    t_len[ 1] = 010   :2
+    t_len[ 2] = 0 00  :0
+                00
+    t_len[ 3] = 000   :0
+    t_len[ 4] = 0 00  :0
+    t_len[ 5] = 01 1  :3
+    t_len[ 6] = 100   :4
+    t_len[ 7] = 001   :1
+    t_len[ 8] = 0 11  :3
+    t_len[ 9] = 00 1  :1
+    t_len[10] = 100   :4
+    t_len[11] = 001   :1
+    t_len[12] = 1 01  :5
+    t_len[13] = 10 0  :4
+    t_len[14] = 000   :0
+    t_len[15] = 110   :6
+    t_len[16] = 0 10  :2
+    t_len[17] = 01 0  :2
+    t_len[18] = 010   :2
+    t_len[19] = 000   :0
+    t_len[20] = 0 00  :0
+    t_len[21] = 00 0  :0
+    t_len[22] = 000   :0
+    t_len[23] = 000   :0
+    t_len[24] = 0 00  :0
+    t_len[25] = 00 0  :0
+    t_len[26] = 000   :0
+    t_len[27] = 000   :0
+    t_len[28] = 0 00  :0
+    t_len[29] = 00, 1 :1
+
+¤³¤Î t_len ¤«¤é Huffman Ìڤγ¬ÁؤÎÍդοô¤Ï¡¢°Ê²¼¤ÎÄ̤ê¤È¤Ê¤ê
+
+    count[1] = 3
+    count[2] = 4
+    count[3] = 2
+    count[4] = 3
+    count[5] = 1
+    count[6] = 2
+
+°Ê²¼¤Î¤è¤¦¤ÊÌڤηÁ¤Ë¤Ê¤ë¤Î¤Ç¡¢ÉÔÀµ¤Ç¤¢¤ë(¿ÞÃæ X ¤Ï¡¢count ¤ÎÃͤ¬ÉÔÀµ¤Ê
+¤¿¤á¤Ë;·×¤Ë½ÐÍ褿ÍÕ¤ò¼¨¤¹)¡£
+
+                     .
+             /     /  \
+            X     .    .          - 1 ³¬ÁØÌÜ
+                 / \  / \
+                .   ..   .        - 2 ³¬ÁØÌÜ
+                        / \
+                       .   .
+                       \  / \
+                        X.   .
+                            / \
+                           .   .
+                              / \
+                             .   .  - 6 ³¬ÁØÌÜ
+
+·ë²ÌŪ¤Ë¡¢c_len[] ¤Ï¤È¤¤¤¦¤È¤³¤Á¤é¤Ï gzip ¤Î¥½¡¼¥¹¤ò½¤Àµ¤·¤Æ¼ÂºÝ¤ËÃͤò
+½ÐÎϤµ¤»¤Æ¤ß¤¿¤È¤³¤í°Ê²¼¤ÎÄ̤ꤹ¤Ù¤Æ¤ÎÃͤ¬ 5 ¤Ë¤Ê¤Ã¤¿¡£¤³¤ì¤Ï¤ä¤Ï¤êÉÔÀµ
+¤Ç¤¢¤ë¡£(³¬ÁØ 5 ¤ÎÍդοô¤¬ 288 ¸Ä¤¢¤ë)
+
+    size of c_len: 100 1000, 0 0x120(288)
+
+    c_len[0] = 5
+    c_len[1] = 5
+      :
+    c_len[287] = 5
+
+
+¤È¤³¤í¤Ç¡¢ËÜÅö¤Ï¤³¤¦¤·¤¿¤«¤Ã¤¿¤Î¤Ç¤Ï¤Ê¤¤¤À¤í¤¦¤«¡©
+
+perl -e 'print "\x1f\xa0","\xab\xcd","\x9e\x40\x01\xc2\xcc\x36\x0c\x92","\xc8","\x00"x"2048"' | gzip -d
+
+¤³¤ì¤Ê¤é¤Ð¡¢t_len[] ¤ÎÎΰ襵¥¤¥º¤ÏĶ¤¨¤Ê¤¤¤Î¤Ç¡¢¤³¤Î¥Á¥§¥Ã¥¯¤Ë¤Ï¤«¤«¤é
+¤Ê¤¤¡£
+
+    blocksize: 0xabcd
+
+    size of t_len: 0x13(19)
+
+    t_len[ 0]: 6
+    t_len[ 1]: 2
+    t_len[ 2]: 0
+    t_len[ 3]: 0
+    t_len[ 4]: 0
+    t_len[ 5]: 3
+    t_len[ 6]: 4
+    t_len[ 7]: 1
+    t_len[ 8]: 3
+    t_len[ 9]: 1
+    t_len[10]: 4
+    t_len[11]: 1
+    t_len[12]: 5
+    t_len[13]: 4
+    t_len[14]: 0
+    t_len[15]: 6
+    t_len[16]: 2
+    t_len[17]: 2
+    t_len[18]: 2
+
+¤½¤·¤Æ¡¢Àè¤Û¤É¤ÈƱ¤¸ count[] ¤Î·ë²Ì¤È¤Ê¤êÉÔÀµ¤ÊÌÚ¤¬¤Ç¤­¤ë¡£
+
+    count[1] = 3
+    count[2] = 4
+    count[3] = 2
+    count[4] = 3
+    count[5] = 1
+    count[6] = 2
+
+·ë²Ì¡¢c_len[] ¤¬ÉÔÀµ¤È¤Ê¤ë¡£
+
+    size of c_len: 0x190 (400)
+
+    c_len[0] = 5
+    c_len[1] = 5
+      :
+
+·ë¶É¡¢¤³¤ÎÌäÂê¤ÏÌڤηÁ¤ÎÉÔÀµ¤ò¸¡½Ð¤Ç¤­¤Æ¤Ê¤¤¤¿¤á¤ËȯÀ¸¤·¤Æ¤¤¤ë¡£Ä´¤Ù¤Æ
+¤ß¤¿¤È¤³¤í¡¢¤³¤ÎÎã¤Ç¤Ï total ¤¬ 0x30000 ¤Ë¤Ê¤ë¤¿¤á¤Ë¡¢
+
+    (total & 0xffff) != 0
+
+¤Ç¸¡½Ð¤Ç¤­¤Æ¤¤¤Ê¤¤¤è¤¦¤Ç¤¢¤ë¡£½¾¤Ã¤Æ¡¢Àè¤Ë¼¨¤·¤¿¤È¤ª¤ê total ¤ò 32 bit
+ÊÑ¿ô¤Ë¤·¤Æ¡¢¤³¤Î¾ò·ï¤ò
+
+    (total != 0x10000)
+
+¤È¤¹¤ë¤³¤È¤Ç²ò·è¤Ç¤­¤ë¤è¤¦¤Ë»×¤¦¡£
+
+# ¤Á¤Ê¤ß¤Ë¡¢¤³¤Î¾ò·ï¤Ï¡Ö¥¯¥é¥Õ¥È¤ÎÉÔÅù¼°¡×¤òÀ°¿ô¤ËÊÑ·Á¤·¤¿¤â¤Î¤Ç¤¢¤ë¤é¤·¤¤¡£
+# ³¬ÁØ 16 °Ê²¼¤Î¥Ï¥Õ¥Þ¥óÌڤǤ¢¤ì¤Ð¡¢
+#
+#   total == 2^16(0x10000)
+#
+# ¤Ïɬ¤ºÀ®¤êΩ¤Á¡¢¤Þ¤¿¡¢
+#
+#   total < 2^16
+#
+# ¤Ç¤¢¤ì¤Ð¡¢¤³¤ÎÌڤϾéŤÊÉä¹æ¤ò³ä¤êÅö¤Æ¤Æ¤¤¤ë¤³¤È¤ò¼¨¤¹¤½¤¦¤À¡£¤½¤·¤Æ¡¢
+#
+#   total > 2^16
+#
+# ¤Ï¡¢°ì°Õ¤ÊÉü¹æ¤¬¤Ç¤­¤Ê¤¤¤³¤È¤ò¼¨¤¹¡£
+
+Ç°¤ò²¡¤·¤Æ¤ª¤¯¤¬¡¢¥»¥­¥å¥ê¥Æ¥£¥Ñ¥Ã¥Á¤¬´Ö°ã¤Ã¤Æ¤¤¤ë¤ï¤±¤Ç¤Ï¤Ê¤¤¡£¥»¥­¥å
+¥ê¥Æ¥£¥Ñ¥Ã¥Á¤È¤·¤Æ¤Ï¥Ð¥Ã¥Õ¥¡¥ª¡¼¥Ð¥Õ¥í¡¼¤òËɤ²¤ÐÎɤ¤¤Î¤Çñ¤Ë¤½¤Î¤¿¤á¤Î
+¥Á¥§¥Ã¥¯¤òÆþ¤ì¤¿¤À¤±¤Ç¤¢¤ë¡£¤¿¤À¤·¡¢¥×¥í¥°¥é¥Þ¤ÎΩ¾ì¤È¤·¤Æ¤Ï¥»¥­¥å¥ê¥Æ¥£
+¥Ñ¥Ã¥Á¤ÏÂоÉÎÅË¡¤Ê½¤Àµ¤Ç¤·¤«¤Ê¤¯¡¢º¬ËÜŪ¤ÊÌäÂêÅÀ¤ò²ò·è¤·¤Æ¤¤¤Ê¤¤¾ì¹ç¤¬
+¤¢¤ë¤È¤¤¤¦¤³¤È¤ò³Ð¤¨¤Æ¤ª¤¯É¬Íפ¬¤¢¤ë¡£¤È»×¤¦¡£
+
+\f
+¤³¤Î¥»¥­¥å¥ê¥Æ¥£¥Ð¥°¤ÎÊó¹ð¤ò¼õ¤±¤Æ¡¢gzip ¤È¤·¤Æ¤É¤Î¤è¤¦¤Ë½¤Àµ¤·¤Æ¤¤¤ë¤«
+¤ò³Îǧ¤·¤Æ¤ß¤¿¡£°Ê²¼¤Ï¡¢ÌäÂ꤬ȯ¸«¤µ¤ì¤¿ gzip-1.3.5 ¤È¤½¤Î½¤Àµ¤¬¹Ô¤ï¤ì
+¤¿ gzip-1.3.6 ¤È¤Îº¹Ê¬(unlzh.c ¤Î¤ß)¤Ç¤¢¤ë¡£
+
+--- gzip-1.3.5/unlzh.c 1999-10-06 14:00:00.000000000 +0900
++++ gzip-1.3.6/unlzh.c 2006-11-20 17:40:34.000000000 +0900
+@@ -4,7 +4,7 @@
+  */
+ 
+ #ifdef RCSID
+-static char rcsid[] = "$Id: unlzh.c,v 1.2 1993/06/24 10:59:01 jloup Exp $";
++static char rcsid[] = "$Id: unlzh.c,v 1.4 2006/11/20 08:40:34 eggert Exp $";
+ #endif
+ 
+ #include <config.h>
+@@ -69,11 +69,7 @@ local void make_table OF((int nchar, uch
+ #define NT (CODE_BIT + 3)
+ #define PBIT 4  /* smallest integer such that (1U << PBIT) > NP */
+ #define TBIT 5  /* smallest integer such that (1U << TBIT) > NT */
+-#if NT > NP
+-# define NPT NT
+-#else
+-# define NPT NP
+-#endif
++#define NPT (1 << TBIT)
+
+
+¶²¤é¤¯¡¢NT ¤òĶ¤¨¤ëÃͤ¬°µ½Ìʸ¤ËËä¤á¹þ¤Þ¤ì¤Æ¤â¥Ð¥Ã¥Õ¥¡¥ª¡¼¥Ð¡¼¥Õ¥í¡¼¤·¤Ê
+¤¤¤è¤¦¤Ë¤¹¤ë¤¿¤á¤Ë pt_len ¤Î¥Ð¥Ã¥Õ¥¡¥µ¥¤¥º¤òÂ礭¤¯¤·¤¿¤Î¤À¤í¤¦(½ÅÍפʲþ
+½¤ÅÀ¤Î£³ÅÀÌܤòÊ̤ÊÊýË¡¤Ç²ò·è¤·¤Æ¤¤¤ë¡£¸Ä¿ÍŪ¤Ë¤Ï¤³¤Î¤è¤¦¤ÊÂнè¤Ï¹¥¤ß¤Ç
+¤Ê¤¤¡£°Õ¿Þ¤¬¤ï¤«¤ê¤Ë¤¯¤¤¤«¤é¤À)
+
+c_len ¤ÎÎΰ襵¥¤¥º(NC)¤Ï¤È¤¤¤¦¤È¡¢gzip ¤Ç¤Ï¸µ¡¹ c_len ¤Î¥Ð¥Ã¥Õ¥¡¥µ¥¤¥º
+¤Ï NC ¤è¤ê¤âÂ礭¤¤(8192 or 16384)¡£¤É¤¦¤ä¤é¾¤ÎÊÑ¿ô¤ò»È¤¤²ó¤·¤·¤Æ¤¤¤ë¤¿
+¤á¤Ë¤³¤Î¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤è¤¦¤À¡£
+
+ /* local ush left[2 * NC - 1]; */
+ /* local ush right[2 * NC - 1]; */
+@@ -155,7 +151,7 @@ local void make_table(nchar, bitlen, tab
+     for (i = 1; i <= 16; i++)
+       start[i + 1] = start[i] + (count[i] << (16 - i));
+     if ((start[17] & 0xffff) != 0)
+-      error("Bad table\n");
++      gzip_error ("Bad table\n");
+
+¤³¤³¤ÎȽÄê(Ìڤι½ÃÛ¤¬Àµ¤·¤¤¤«¤É¤¦¤«)¤ÏÊѤ¨¤Ê¤«¤Ã¤¿¤è¤¦¤À¡£
+
+     jutbits = 16 - tablebits;
+     for (i = 1; i <= (unsigned)tablebits; i++) {
+@@ -179,6 +175,8 @@ local void make_table(nchar, bitlen, tab
+       if ((len = bitlen[ch]) == 0) continue;
+       nextcode = start[len] + weight[len];
+       if (len <= (unsigned)tablebits) {
++          if ((unsigned) 1 << tablebits < nextcode)
++            gzip_error ("Bad table\n");
+           for (i = start[len]; i < nextcode; i++) table[i] = ch;
+       } else {
+           k = start[len];
+
+Âå¤ï¤ê¤Ë¡¢table[] ¤ÎÎΰèÈϰϤòĶ¤¨¤ëÉä¹æ¤¬¸½¤ì¤¿¾ì¹ç¤Ë¥¨¥é¡¼¤Ë¤Ê¤ë¤è¤¦
+¤Ë¤·¤Æ¤¤¤ë(½ÅÍפʲþ½¤ÅÀ¤Î£²ÅÀÌÜ¡£¤Á¤ã¤ó¤È¡¢c_len ¤À¤±¤Ç¤Ê¤¯¡¢pt_len ¤Î
+¾ì¹ç¤â¥Á¥§¥Ã¥¯¤µ¤ì¤ë¤³¤È¤Ë¤Ê¤ë)¡£
+
+@@ -223,6 +221,8 @@ local void read_pt_len(nn, nbit, i_speci
+           if (c == 7) {
+               mask = (unsigned) 1 << (BITBUFSIZ - 1 - 3);
+               while (mask & bitbuf) {  mask >>= 1;  c++;  }
++              if (16 < c)
++                gzip_error ("Bad table\n");
+           }
+           fillbuf((c < 7) ? 3 : c - 3);
+           pt_len[i++] = c;
+
+p_len, t_len ¤Ë¤Ä¤¤¤Æ Huffman Éä¹æŤè¤êÂ礭¤¤Ãͤ¬Éü¹æ¸ì¤È¤Ê¤ë¾ì¹ç¤Ë¥¨
+¥é¡¼¤È¤·¤Æ¤¤¤ë¡£(½ÅÍפʲþ½¤ÅÀ¤Î£±ÅÀÌÜ)
+
+¥Ñ¥Ã¥Á¤Ç¤Ï¡¢make_table() Æâ¤Ç¥Á¥§¥Ã¥¯¤·¤Æ¤¤¤¿¤È¤³¤í¤ò¼ÂºÝ¤ËÃͤòÆɤ߹þ¤à
+²Õ½ê¤Ë°Ü¤·¤¿¤Î¤À¤í¤¦¡£¤½¤·¤Æ¡¢c_len ¤Î¾ì¹ç¤Ï¡¢t_len ¤ÎÉü¹æ¤ÇÌڤι½ÃÛ
+¥Á¥§¥Ã¥¯¤Ë¤Æ¥¨¥é¡¼¤¬¸¡½Ð¤µ¤ì¤Ê¤±¤ì¤ÐÌäÂê¤Ê¤¤¤È¤ß¤Ê¤·¤Æ¤¤¤ë¤Î¤À¤í¤¦¤È»×
+¤¦¡£
+
+¤É¤¦¤ä¤éÊý¿Ë¤È¤·¤Æ¤ÏºÇÄã¸Â¤Î¥Á¥§¥Ã¥¯¤ÇºÑ¤Þ¤»¤Æ¤¤¤ë¤é¤·¤¤¡£¤µ¤¹¤¬¤Ë¥¢¥ë
+¥´¥ê¥º¥à¤ò½ÏÃΤ·¤¿¾å¤Ç¤Î½¤Àµ¤Î¤è¤¦¤Ë¸«¤¨¤ë¤¬¡¢¤³¤ì¤ÇÎɤ¤¤Î¤«¤¤¤Þ¤Ò¤È¤Ä
+³Î¿®¤¬»ý¤Æ¤Ê¤¤¡£¤Þ¤¢¡¢gzip ¤Ë¤Ä¤¤¤Æ¤Ï¤³¤ì°Ê¾å¤Ï¿¨¤ì¤Ê¤¤¤Ç¤ª¤³¤¦¡£
+
+\f
 # Local Variables:
 # mode : indented-text
 # indent-tabs-mode: nil