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Precision Math implementation

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BitKeeper/etc/ignore:
  Added client/decimal.c client/my_decimal.cc client/my_decimal.h to the ignore list
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unknown
2005-02-09 02:50:45 +04:00
parent 63bcbfc433
commit 91db48e35a
104 changed files with 9131 additions and 1730 deletions
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9
include/decimal.h
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@ -26,7 +26,9 @@ typedef struct st_decimal {
decimal_digit *buf;
} decimal;
int decimal2string(decimal *from, char *to, int *to_len);
int decimal2string(decimal *from, char *to, int *to_len,
int fixed_precision, int fixed_decimals,
char filler);
int string2decimal(char *from, decimal *to, char **end);
int string2decimal_fixed(char *from, decimal *to, char **end);
int decimal2ulonglong(decimal *from, ulonglong *to);
@ -35,6 +37,7 @@ int decimal2longlong(decimal *from, longlong *to);
int longlong2decimal(longlong from, decimal *to);
int decimal2double(decimal *from, double *to);
int double2decimal(double from, decimal *to);
void decimal_optimize_fraction(decimal *from);
int decimal2bin(decimal *from, char *to, int precision, int scale);
int bin2decimal(char *from, decimal *to, int precision, int scale);
@ -50,6 +53,7 @@ int decimal_div(decimal *from1, decimal *from2, decimal *to, int scale_incr);
int decimal_mod(decimal *from1, decimal *from2, decimal *to);
int decimal_round(decimal *from, decimal *to, int new_scale, decimal_round_mode mode);
int decimal_is_zero(decimal *from);
void max_decimal(int precision, int frac, decimal *to);
/* set a decimal to zero */
@ -65,7 +69,8 @@ int decimal_is_zero(decimal *from);
of the decimal (including decimal dot, possible sign and \0)
*/
#define decimal_string_size(dec) ((dec)->intg + (dec)->frac + ((dec)->frac > 0) + 2)
#define decimal_string_size(dec) (((dec)->intg ? (dec)->intg : 1) + \
(dec)->frac + ((dec)->frac > 0) + 2)
/* negate a decimal */
#define decimal_neg(dec) do { (dec)->sign^=1; } while(0)