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int decimal_is_zero(decimal *from);

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2004-12-06 15:08:26 +01:00
parent 399e2ae37d
commit a4a69f7312
2 changed files with 11 additions and 7 deletions
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8
include/decimal.h
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@ -51,13 +51,7 @@ int decimal_mul(decimal *from1, decimal *from2, decimal *to);
int decimal_div(decimal *from1, decimal *from2, decimal *to, int scale_incr); int decimal_div(decimal *from1, decimal *from2, decimal *to, int scale_incr);
int decimal_mod(decimal *from1, decimal *from2, decimal *to); 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_round(decimal *from, decimal *to, int new_scale, decimal_round_mode mode);
int decimal_is_zero(decimal *from);
/*
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 */ /* set a decimal to zero */

10
strings/decimal.c
View File

@ -1240,6 +1240,16 @@ int decimal_cmp(decimal *from1, decimal *from2)
return from1->sign > from2->sign ? -1 : 1; return from1->sign > from2->sign ? -1 : 1;
} }
int decimal_is_zero(decimal *from)
{
dec1 *buf1=from->buf,
*end=buf1+ROUND_UP(from->intg)+ROUND_UP(from->frac);
while (buf1 < end)
if (*buf1++)
return 0;
return 1;
}
/* /*
multiply two decimals multiply two decimals