K:/CMGDKv18/SDK/Source/SQL/MySQL/include/decimal.h文件参考

浏览该文件的源代码。

组合类型
struct	st_decimal_t
宏定义
#define	string2decimal(A, B, C)   internal_str2dec((A), (B), (C), 0)
#define	string2decimal_fixed(A, B, C)   internal_str2dec((A), (B), (C), 1)
#define	decimal_make_zero(dec)
#define	decimal_string_size(dec)
#define	decimal_neg(dec)   do { (dec)->sign^=1; } while(0)
#define	E_DEC_OK   0
#define	E_DEC_TRUNCATED   1
#define	E_DEC_OVERFLOW   2
#define	E_DEC_DIV_ZERO   4
#define	E_DEC_BAD_NUM   8
#define	E_DEC_OOM   16
#define	E_DEC_ERROR   31
#define	E_DEC_FATAL_ERROR   30
类型定义
typedef int32	decimal_digit_t
typedef struct st_decimal_t	decimal_t
枚举
enum	decimal_round_mode {   TRUNCATE = 0, HALF_EVEN, HALF_UP, CEILING,   FLOOR }
函数
int	internal_str2dec (const char *from, decimal_t *to, char **end, my_bool fixed)
int	decimal2string (decimal_t *from, char *to, int *to_len, int fixed_precision, int fixed_decimals, char filler)
int	decimal2ulonglong (decimal_t *from, ulonglong *to)
int	ulonglong2decimal (ulonglong from, decimal_t *to)
int	decimal2longlong (decimal_t *from, longlong *to)
int	longlong2decimal (longlong from, decimal_t *to)
int	decimal2double (decimal_t *from, double *to)
int	double2decimal (double from, decimal_t *to)
int	decimal_actual_fraction (decimal_t *from)
int	decimal2bin (decimal_t *from, uchar *to, int precision, int scale)
int	bin2decimal (const uchar *from, decimal_t *to, int precision, int scale)
int	decimal_size (int precision, int scale)
int	decimal_bin_size (int precision, int scale)
int	decimal_result_size (decimal_t *from1, decimal_t *from2, char op, int param)
int	decimal_intg (decimal_t *from)
int	decimal_add (decimal_t *from1, decimal_t *from2, decimal_t *to)
int	decimal_sub (decimal_t *from1, decimal_t *from2, decimal_t *to)
int	decimal_cmp (decimal_t *from1, decimal_t *from2)
int	decimal_mul (decimal_t *from1, decimal_t *from2, decimal_t *to)
int	decimal_div (decimal_t *from1, decimal_t *from2, decimal_t *to, int scale_incr)
int	decimal_mod (decimal_t *from1, decimal_t *from2, decimal_t *to)
int	decimal_round (decimal_t *from, decimal_t *to, int new_scale, decimal_round_mode mode)
int	decimal_is_zero (decimal_t *from)
void	max_decimal (int precision, int frac, decimal_t *to)

---

宏定义文档

#define decimal_make_zero

(

dec

)

值:

do {                \
                                        (dec)->buf[0]=0;    \
                                        (dec)->intg=1;      \
                                        (dec)->frac=0;      \
                                        (dec)->sign=0;      \
                                      } while(0)

#define decimal_neg

(

dec

)

do { (dec)->sign^=1; } while(0)

#define decimal_string_size

(

dec

)

值:

(((dec)->intg ? (dec)->intg : 1) + \
                  (dec)->frac + ((dec)->frac > 0) + 2)

#define E_DEC_BAD_NUM   8

#define E_DEC_DIV_ZERO   4

#define E_DEC_ERROR   31

#define E_DEC_FATAL_ERROR   30

#define E_DEC_OK   0

#define E_DEC_OOM   16

#define E_DEC_OVERFLOW   2

#define E_DEC_TRUNCATED   1

#define string2decimal	(		A,
			B,
			C
	)		internal_str2dec((A), (B), (C), 0)

#define string2decimal_fixed	(		A,
			B,
			C
	)		internal_str2dec((A), (B), (C), 1)

---

类型定义文档

typedef int32 decimal_digit_t

typedef struct st_decimal_t decimal_t

---

枚举类型文档

enum decimal_round_mode

枚举值:

TRUNCATE
HALF_EVEN
HALF_UP
CEILING
FLOOR

---

函数文档

int bin2decimal	(	const uchar *	from,
		decimal_t *	to,
		int	precision,
		int	scale
	)

int decimal2bin	(	decimal_t *	from,
		uchar *	to,
		int	precision,
		int	scale
	)

int decimal2double	(	decimal_t *	from,
		double *	to
	)

int decimal2longlong	(	decimal_t *	from,
		longlong *	to
	)

int decimal2string	(	decimal_t *	from,
		char *	to,
		int *	to_len,
		int	fixed_precision,
		int	fixed_decimals,
		char	filler
	)

int decimal2ulonglong	(	decimal_t *	from,
		ulonglong *	to
	)

int decimal_actual_fraction

(

decimal_t *

from

)

int decimal_add	(	decimal_t *	from1,
		decimal_t *	from2,
		decimal_t *	to
	)

int decimal_bin_size	(	int	precision,
		int	scale
	)

int decimal_cmp	(	decimal_t *	from1,
		decimal_t *	from2
	)

int decimal_div	(	decimal_t *	from1,
		decimal_t *	from2,
		decimal_t *	to,
		int	scale_incr
	)

int decimal_intg

(

decimal_t *

from

)

int decimal_is_zero

(

decimal_t *

from

)

int decimal_mod	(	decimal_t *	from1,
		decimal_t *	from2,
		decimal_t *	to
	)

int decimal_mul	(	decimal_t *	from1,
		decimal_t *	from2,
		decimal_t *	to
	)

int decimal_result_size	(	decimal_t *	from1,
		decimal_t *	from2,
		char	op,
		int	param
	)

int decimal_round	(	decimal_t *	from,
		decimal_t *	to,
		int	new_scale,
		decimal_round_mode	mode
	)

int decimal_size	(	int	precision,
		int	scale
	)

int decimal_sub	(	decimal_t *	from1,
		decimal_t *	from2,
		decimal_t *	to
	)

int double2decimal	(	double	from,
		decimal_t *	to
	)

int internal_str2dec	(	const char *	from,
		decimal_t *	to,
		char **	end,
		my_bool	fixed
	)

int longlong2decimal	(	longlong	from,
		decimal_t *	to
	)

void max_decimal	(	int	precision,
		int	frac,
		decimal_t *	to
	)

int ulonglong2decimal	(	ulonglong	from,
		decimal_t *	to
	)