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。
| DIR:/usr/include/mysql/server/ |
| Current File : //usr/include/mysql/server/little_endian.h |
/* 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 little-endian format.
*/
#ifndef MY_BYTE_ORDER_ARCH_OPTIMIZED
#define float4get(V,M) memcpy(&V, (M), sizeof(float))
#define float4store(V,M) memcpy(V, (&M), sizeof(float))
#define float8get(V,M) doubleget((V),(M))
#define float8store(V,M) doublestore((V),(M))
/* Bi-endian hardware.... */
#if defined(__FLOAT_WORD_ORDER) && (__FLOAT_WORD_ORDER == __BIG_ENDIAN)
#define doublestore(T,V) do { *(((char*)T)+0)=(char) ((uchar *) &V)[4];\
*(((char*)T)+1)=(char) ((uchar *) &V)[5];\
*(((char*)T)+2)=(char) ((uchar *) &V)[6];\
*(((char*)T)+3)=(char) ((uchar *) &V)[7];\
*(((char*)T)+4)=(char) ((uchar *) &V)[0];\
*(((char*)T)+5)=(char) ((uchar *) &V)[1];\
*(((char*)T)+6)=(char) ((uchar *) &V)[2];\
*(((char*)T)+7)=(char) ((uchar *) &V)[3]; }\
while(0)
#define doubleget(V,M) do { double def_temp;\
((uchar*) &def_temp)[0]=(M)[4];\
((uchar*) &def_temp)[1]=(M)[5];\
((uchar*) &def_temp)[2]=(M)[6];\
((uchar*) &def_temp)[3]=(M)[7];\
((uchar*) &def_temp)[4]=(M)[0];\
((uchar*) &def_temp)[5]=(M)[1];\
((uchar*) &def_temp)[6]=(M)[2];\
((uchar*) &def_temp)[7]=(M)[3];\
(V) = def_temp; } while(0)
#else /* Bi-endian hardware.... */
/* Cast away type qualifiers (necessary as macro takes argument by value). */
#define doublestore(T,V) memcpy((T), (void*) &V, sizeof(double))
#define doubleget(V,M) memcpy(&V, (M), sizeof(double))
#endif /* Bi-endian hardware.... */
#endif /* !MY_BYTE_ORDER_ARCH_OPTIMIZED */
#define ushortget(V,M) do { uchar *pM= (uchar*)(M);V = uint2korr(pM);} while(0)
#define shortget(V,M) do { uchar *pM= (uchar*)(M);V = sint2korr(pM);} while(0)
#define longget(V,M) do { uchar *pM= (uchar*)(M);V = sint4korr(pM);} while(0)
#define ulongget(V,M) do { uchar *pM= (uchar*)(M);V = uint4korr(pM);} while(0)
#define shortstore(T,V) int2store(T,V)
#define longstore(T,V) int4store(T,V)
#ifndef floatstore
/* Cast away type qualifiers (necessary as macro takes argument by value). */
#define floatstore(T,V) memcpy((T), (void*) (&V), sizeof(float))
#define floatget(V,M) memcpy(&V, (M), sizeof(float))
#endif
#ifndef doubleget
#define doubleget(V,M) memcpy(&V, (M), sizeof(double))
#define doublestore(T,V) memcpy((T), (void *) &V, sizeof(double))
#endif /* doubleget */
#define longlongget(V,M) memcpy(&V, (M), sizeof(ulonglong))
#define longlongstore(T,V) memcpy((T), &V, sizeof(ulonglong))
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