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/mysql/ |
| Current File : //usr/include/mysql/server/mysql/service_base64.h |
#ifndef MYSQL_SERVICE_BASE64_INCLUDED
/* Copyright (c) 2017, MariaDB
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 */
/**
@file
my base64 service
Functions for base64 en- and decoding
*/
#ifdef __cplusplus
extern "C" {
#endif
#ifndef MYSQL_ABI_CHECK
#include <stdlib.h>
#endif
/* Allow multiple chunks 'AAA= AA== AA==', binlog uses this */
#define MY_BASE64_DECODE_ALLOW_MULTIPLE_CHUNKS 1
extern struct base64_service_st {
int (*base64_needed_encoded_length_ptr)(int length_of_data);
int (*base64_encode_max_arg_length_ptr)(void);
int (*base64_needed_decoded_length_ptr)(int length_of_encoded_data);
int (*base64_decode_max_arg_length_ptr)();
int (*base64_encode_ptr)(const void *src, size_t src_len, char *dst);
int (*base64_decode_ptr)(const char *src, size_t src_len,
void *dst, const char **end_ptr, int flags);
} *base64_service;
#ifdef MYSQL_DYNAMIC_PLUGIN
#define my_base64_needed_encoded_length(A) base64_service->base64_needed_encoded_length_ptr(A)
#define my_base64_encode_max_arg_length() base64_service->base64_encode_max_arg_length_ptr()
#define my_base64_needed_decoded_length(A) base64_service->base64_needed_decoded_length_ptr(A)
#define my_base64_decode_max_arg_length() base64_service->base64_decode_max_arg_length_ptr()
#define my_base64_encode(A,B,C) base64_service->base64_encode_ptr(A,B,C)
#define my_base64_decode(A,B,C,D,E) base64_service->base64_decode_ptr(A,B,C,D,E)
#else
/* Calculate how much memory needed for dst of my_base64_encode() */
int my_base64_needed_encoded_length(int length_of_data);
/* Maximum length my_base64_encode_needed_length() can accept with no overflow. */
int my_base64_encode_max_arg_length(void);
/* Calculate how much memory needed for dst of my_base64_decode() */
int my_base64_needed_decoded_length(int length_of_encoded_data);
/* Maximum length my_base64_decode_needed_length() can accept with no overflow. */
int my_base64_decode_max_arg_length();
/* Encode data as a my_base64 string */
int my_base64_encode(const void *src, size_t src_len, char *dst);
/* Decode a my_base64 string into data */
int my_base64_decode(const char *src, size_t src_len,
void *dst, const char **end_ptr, int flags);
#endif
#ifdef __cplusplus
}
#endif
#define MYSQL_SERVICE_BASE64_INCLUDED
#endif
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