D7net
Home
Console
Upload
information
Create File
Create Folder
About
Tools
:
/
usr
/
include
/
mysql
/
Filename :
decimal.h
back
Copy
/* Copyright (c) 2000, 2023, Oracle and/or its affiliates. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 2.0, as published by the Free Software Foundation. This program is also distributed with certain software (including but not limited to OpenSSL) that is licensed under separate terms, as designated in a particular file or component or in included license documentation. The authors of MySQL hereby grant you an additional permission to link the program and your derivative works with the separately licensed software that they have included with MySQL. 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, version 2.0, 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 02110-1301 USA */ #ifndef DECIMAL_INCLUDED #define DECIMAL_INCLUDED typedef enum {TRUNCATE=0, HALF_EVEN, HALF_UP, CEILING, FLOOR} decimal_round_mode; typedef int32 decimal_digit_t; /** intg is the number of *decimal* digits (NOT number of decimal_digit_t's !) before the point frac is the number of decimal digits after the point len is the length of buf (length of allocated space) in decimal_digit_t's, not in bytes sign false means positive, true means negative buf is an array of decimal_digit_t's */ typedef struct st_decimal_t { int intg, frac, len; my_bool sign; decimal_digit_t *buf; } decimal_t; #ifndef MYSQL_ABI_CHECK int internal_str2dec(const char *from, decimal_t *to, char **end, my_bool fixed); int decimal2string(const 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(const 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); /** Convert decimal to lldiv_t. The integer part is stored in to->quot. The fractional part is multiplied to 10^9 and stored to to->rem. @param from Decimal value @param to lldiv_t value @retval 0 on success @retval !0 in error */ int decimal2lldiv_t(const decimal_t *from, lldiv_t *to); /** Convert doube to lldiv_t. The integer part is stored in to->quot. The fractional part is multiplied to 10^9 and stored to to->rem. @param from Decimal value @param to lldiv_t value @retval 0 on success @retval !0 in error */ int double2lldiv_t(double from, lldiv_t *to); 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(const decimal_t *from); int decimal_add(const decimal_t *from1, const decimal_t *from2, decimal_t *to); int decimal_sub(const decimal_t *from1, const decimal_t *from2, decimal_t *to); int decimal_cmp(const decimal_t *from1, const decimal_t *from2); int decimal_mul(const decimal_t *from1, const decimal_t *from2, decimal_t *to); int decimal_div(const decimal_t *from1, const decimal_t *from2, decimal_t *to, int scale_incr); int decimal_mod(const decimal_t *from1, const decimal_t *from2, decimal_t *to); int decimal_round(const decimal_t *from, decimal_t *to, int new_scale, decimal_round_mode mode); int decimal_is_zero(const decimal_t *from); void max_decimal(int precision, int frac, decimal_t *to); #define string2decimal(A,B,C) internal_str2dec((A), (B), (C), 0) #define string2decimal_fixed(A,B,C) internal_str2dec((A), (B), (C), 1) /* set a decimal_t to zero */ #define decimal_make_zero(dec) do { \ (dec)->buf[0]=0; \ (dec)->intg=1; \ (dec)->frac=0; \ (dec)->sign=0; \ } while(0) /* returns the length of the buffer to hold string representation of the decimal (including decimal dot, possible sign and \0) */ #define decimal_string_size(dec) (((dec)->intg ? (dec)->intg : 1) + \ (dec)->frac + ((dec)->frac > 0) + 2) /* conventions: decimal_smth() == 0 -- everything's ok decimal_smth() <= 1 -- result is usable, but precision loss is possible decimal_smth() <= 2 -- result can be unusable, most significant digits could've been lost decimal_smth() > 2 -- no result was generated */ #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 #endif // !MYSQL_ABI_CHECK #endif