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:/opt/alt/python313/include/python3.13/internal/ |
| Current File : //opt/alt/python313/include/python3.13/internal/pycore_dtoa.h |
#ifndef Py_INTERNAL_DTOA_H
#define Py_INTERNAL_DTOA_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef Py_BUILD_CORE
# error "this header requires Py_BUILD_CORE define"
#endif
#include "pycore_pymath.h" // _PY_SHORT_FLOAT_REPR
typedef uint32_t ULong;
struct
Bigint {
struct Bigint *next;
int k, maxwds, sign, wds;
ULong x[1];
};
#if defined(Py_USING_MEMORY_DEBUGGER) || _PY_SHORT_FLOAT_REPR == 0
struct _dtoa_state {
int _not_used;
};
#define _dtoa_state_INIT(INTERP) \
{0}
#else // !Py_USING_MEMORY_DEBUGGER && _PY_SHORT_FLOAT_REPR != 0
/* The size of the Bigint freelist */
#define Bigint_Kmax 7
/* The size of the cached powers of 5 array */
#define Bigint_Pow5size 8
#ifndef PRIVATE_MEM
#define PRIVATE_MEM 2304
#endif
#define Bigint_PREALLOC_SIZE \
((PRIVATE_MEM+sizeof(double)-1)/sizeof(double))
struct _dtoa_state {
// p5s is an array of powers of 5 of the form:
// 5**(2**(i+2)) for 0 <= i < Bigint_Pow5size
struct Bigint *p5s[Bigint_Pow5size];
// XXX This should be freed during runtime fini.
struct Bigint *freelist[Bigint_Kmax+1];
double preallocated[Bigint_PREALLOC_SIZE];
double *preallocated_next;
};
#define _dtoa_state_INIT(INTERP) \
{ \
.preallocated_next = (INTERP)->dtoa.preallocated, \
}
#endif // !Py_USING_MEMORY_DEBUGGER
extern double _Py_dg_strtod(const char *str, char **ptr);
extern char* _Py_dg_dtoa(double d, int mode, int ndigits,
int *decpt, int *sign, char **rve);
extern void _Py_dg_freedtoa(char *s);
extern PyStatus _PyDtoa_Init(PyInterpreterState *interp);
extern void _PyDtoa_Fini(PyInterpreterState *interp);
#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_DTOA_H */
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