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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/* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.

   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 St, Fifth Floor, Boston, MA 02110-1335 USA */

/*
  Data in big-endian format.
*/
#define float4store(T,A) do { *(T)= ((uchar *) &A)[3];\
                              *((T)+1)=(char) ((uchar *) &A)[2];\
                              *((T)+2)=(char) ((uchar *) &A)[1];\
                              *((T)+3)=(char) ((uchar *) &A)[0]; } while(0)

#define float4get(V,M)   do { float def_temp;\
                              ((uchar*) &def_temp)[0]=(M)[3];\
                              ((uchar*) &def_temp)[1]=(M)[2];\
                              ((uchar*) &def_temp)[2]=(M)[1];\
                              ((uchar*) &def_temp)[3]=(M)[0];\
                              (V)=def_temp; } while(0)

#define float8store(T,V) do { *(T)= ((uchar *) &V)[7];\
                              *((T)+1)=(char) ((uchar *) &V)[6];\
                              *((T)+2)=(char) ((uchar *) &V)[5];\
                              *((T)+3)=(char) ((uchar *) &V)[4];\
                              *((T)+4)=(char) ((uchar *) &V)[3];\
                              *((T)+5)=(char) ((uchar *) &V)[2];\
                              *((T)+6)=(char) ((uchar *) &V)[1];\
                              *((T)+7)=(char) ((uchar *) &V)[0]; } while(0)

#define float8get(V,M)   do { double def_temp;\
                              ((uchar*) &def_temp)[0]=(M)[7];\
                              ((uchar*) &def_temp)[1]=(M)[6];\
                              ((uchar*) &def_temp)[2]=(M)[5];\
                              ((uchar*) &def_temp)[3]=(M)[4];\
                              ((uchar*) &def_temp)[4]=(M)[3];\
                              ((uchar*) &def_temp)[5]=(M)[2];\
                              ((uchar*) &def_temp)[6]=(M)[1];\
                              ((uchar*) &def_temp)[7]=(M)[0];\
                              (V) = def_temp; } while(0)

#define ushortget(V,M)  do { V = (uint16) (((uint16) ((uchar) (M)[1]))+\
                                 ((uint16) ((uint16) (M)[0]) << 8)); } while(0)
#define shortget(V,M)   do { V = (short) (((short) ((uchar) (M)[1]))+\
                                 ((short) ((short) (M)[0]) << 8)); } while(0)
#define longget(V,M)    do { int32 def_temp;\
                             ((uchar*) &def_temp)[0]=(M)[0];\
                             ((uchar*) &def_temp)[1]=(M)[1];\
                             ((uchar*) &def_temp)[2]=(M)[2];\
                             ((uchar*) &def_temp)[3]=(M)[3];\
                             (V)=def_temp; } while(0)
#define ulongget(V,M)   do { uint32 def_temp;\
                            ((uchar*) &def_temp)[0]=(M)[0];\
                            ((uchar*) &def_temp)[1]=(M)[1];\
                            ((uchar*) &def_temp)[2]=(M)[2];\
                            ((uchar*) &def_temp)[3]=(M)[3];\
                            (V)=def_temp; } while(0)
#define shortstore(T,A) do { uint def_temp=(uint) (A) ;\
                             *(((char*)T)+1)=(char)(def_temp); \
                             *(((char*)T)+0)=(char)(def_temp >> 8); } while(0)
#define longstore(T,A)  do { *(((char*)T)+3)=((A));\
                             *(((char*)T)+2)=(((A) >> 8));\
                             *(((char*)T)+1)=(((A) >> 16));\
                             *(((char*)T)+0)=(((A) >> 24)); } while(0)

#define floatget(V,M)      memcpy(&V, (M), sizeof(float))
/* Cast away type qualifiers (necessary as macro takes argument by value). */
#define floatstore(T,V)    memcpy((T), (void*) (&V), sizeof(float))
#define doubleget(V,M)     memcpy(&V, (M), sizeof(double))
/* Cast away type qualifiers (necessary as macro takes argument by value). */
#define doublestore(T,V)   memcpy((T), (void*) &V, sizeof(double))
#define longlongget(V,M)   memcpy(&V, (M), sizeof(ulonglong))
#define longlongstore(T,V) memcpy((T), &V, sizeof(ulonglong))