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strings/decimal.c

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handle test_ro(".999", 0, HALF_UP, "1");


strings/decimal.c:
  handle test_ro(".999", 0, HALF_UP, "1");
This commit is contained in:
unknown 2004-12-06 13:06:52 +01:00
parent f09c8b35f4
commit 66531aa491
1 changed files with 14 additions and 4 deletions
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18
strings/decimal.c
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@ -901,19 +901,26 @@ int decimal_round(decimal *from, decimal *to, int scale, decimal_round_mode mode
if (scale >= from->frac)
goto done; /* nothing to do */
DBUG_ASSERT(frac0+intg0 > 0);
buf0+=intg0+frac0-1;
buf1+=intg0+frac0-1;
if (scale == frac0*DIG_PER_DEC1)
{
DBUG_ASSERT(frac0+intg0 >= 0);
x=buf0[1]/DIG_MASK;
if (x > round_digit ||
(round_digit == 5 && x == 5 && (mode == HALF_UP || *buf0 & 1)))
(*buf1)++;
(round_digit == 5 && x == 5 && (mode == HALF_UP ||
(frac0+intg0 > 0 && *buf0 & 1))))
{
if (frac0+intg0>0)
(*buf1)++;
else
*(++buf1)=DIG_BASE;
}
}
else
{
int pos=frac0*DIG_PER_DEC1-scale-1;
DBUG_ASSERT(frac0+intg0 > 0);
x=*buf1 / powers10[pos];
y=x % 10;
if (y > round_digit ||
@ -942,7 +949,7 @@ int decimal_round(decimal *from, decimal *to, int scale, decimal_round_mode mode
scale=frac0*DIG_PER_DEC1;
error=E_DEC_TRUNCATED; /* XXX */
}
for (buf1=to->buf+frac0+intg0; buf1 > to->buf; buf1--)
for (buf1=to->buf+intg0+max(frac0,0); buf1 > to->buf; buf1--)
{
buf1[0]=buf1[-1];
}
@ -2103,6 +2110,9 @@ main()
test_ro("15.4",-1,HALF_UP,"20");
test_ro("-15.4",-1,HALF_UP,"-20");
test_ro("5.4",-1,HALF_UP,"10");
test_ro(".999", 0, HALF_UP, "1");
memset(buf2, 33, sizeof(buf2));
test_ro("999999999", -9, HALF_UP, "1000000000");
test_ro("15.1",0,HALF_EVEN,"15");
test_ro("15.5",0,HALF_EVEN,"16");
test_ro("14.5",0,HALF_EVEN,"14");