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Fix erroneous error tests in pow/exp.

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This commit is contained in:
Tom Lane 2007-01-03 19:34:23 +00:00
parent 0d5eb8f9ea
commit 812095d604
1 changed files with 3 additions and 4 deletions
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7
src/backend/utils/adt/float.c
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@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.137 2007/01/03 14:35:24 momjian Exp $ * $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.138 2007/01/03 19:34:23 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -1445,7 +1445,7 @@ dpow(PG_FUNCTION_ARGS)
*/ */
errno = 0; errno = 0;
result = pow(arg1, arg2); result = pow(arg1, arg2);
if (errno == ERANGE && isnan(result)) if (errno == ERANGE || isnan(result))
{ {
if ((fabs(arg1) > 1 && arg2 >= 0) || (fabs(arg1) < 1 && arg2 < 0)) if ((fabs(arg1) > 1 && arg2 >= 0) || (fabs(arg1) < 1 && arg2 < 0))
result = (arg1 >= 0) ? get_float8_infinity() : -get_float8_infinity(); result = (arg1 >= 0) ? get_float8_infinity() : -get_float8_infinity();
@ -1474,14 +1474,13 @@ dexp(PG_FUNCTION_ARGS)
*/ */
errno = 0; errno = 0;
result = exp(arg1); result = exp(arg1);
if (errno == ERANGE && isnan(result)) if (errno == ERANGE || isnan(result))
{ {
if (arg1 >= 0) if (arg1 >= 0)
result = get_float8_infinity(); result = get_float8_infinity();
else else
result = 0; result = 0;
} }
CHECKFLOATVAL(result, isinf(arg1), false); CHECKFLOATVAL(result, isinf(arg1), false);
PG_RETURN_FLOAT8(result); PG_RETURN_FLOAT8(result);