晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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#ifndef MY_MD5_INCLUDED
#define MY_MD5_INCLUDED

/* Copyright (c) 2000, 2012, Oracle and/or its affiliates.
   Copyright (c) 2013 Monty Program Ab

   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; version 2 of the License.

   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, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1335  USA */

#include "m_string.h"

#define MD5_HASH_SIZE 16 /* Hash size in bytes */

/*
  Wrapper function for MD5 implementation.
*/
#ifdef __cplusplus
extern "C" {
#endif

#define compute_md5_hash(A,B,C) my_md5(A,B,C)

/*
  Convert an array of bytes to a hexadecimal representation.

  Used to generate a hexadecimal representation of a message digest.
*/
static inline void array_to_hex(char *to, const unsigned char *str, uint len)
{
  const unsigned char *str_end= str + len;
  for (; str != str_end; ++str)
  {
    *to++= _dig_vec_lower[((uchar) *str) >> 4];
    *to++= _dig_vec_lower[((uchar) *str) & 0x0F];
  }
}

#ifdef __cplusplus
}
#endif

#endif /* MY_MD5_INCLUDED */