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new api per hf request:

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string2decimal_fixed
  decimal_round(from, to)
  decimal_make_zero
  decimal_string_size
  decimal_neg


strings/decimal.c:
  new api per hf request:
    string2decimal_fixed
    decimal_round(from, to)
    decimal_make_zero
This commit is contained in:
unknown
2004-10-29 00:22:54 +02:00
parent 2260f6d8e0
commit bbfb40404f
2 changed files with 130 additions and 72 deletions
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23
include/decimal.h
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@ -30,6 +30,7 @@ typedef struct st_decimal {
int decimal2string(decimal *from, char *to, int *to_len);
int string2decimal(char *from, decimal *to, char **end);
int string2decimal_fixed(char *from, decimal *to, char **end);
int decimal2ulonglong(decimal *from, ulonglong *to);
int ulonglong2decimal(ulonglong from, decimal *to);
int decimal2longlong(decimal *from, longlong *to);
@ -49,14 +50,34 @@ int decimal_cmp(decimal *from1, decimal *from2);
int decimal_mul(decimal *from1, decimal *from2, decimal *to);
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 *dec, int new_scale, dec_round_mode mode);
int decimal_round(decimal *from, decimal *to, int new_scale, dec_round_mode mode);
/*
the following works only on special "zero" decimal, not on any
decimal that happen to evaluate to zero
*/
#define decimal_is_zero(dec) ((dec)->intg1==1 && (dec)->frac1==0 && (dec)->buf[0]==0)
/* set a decimal 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
*/
#define decimal_string_size(dec) ((dec)->intg + (dec)->frac + ((dec)->frac > 0) + 1)
/* negate a decimal */
#define decimal_neg(dec) do { (dec)->sign=!(dec)->sign; } while(0)
/*
conventions: