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Add comments about why errno is set to zero.
This commit is contained in:
Bruce Momjian
parent
814acfcc3a
commit
277b2ea328
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.162 2005/12/01 17:56:34 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.163 2005/12/01 20:06:37 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -1013,7 +1013,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
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if (tzp == NULL)
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return DTERR_BAD_FORMAT;
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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val = strtol(field[i], &cp, 10);
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if (errno == ERANGE)
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return DTERR_FIELD_OVERFLOW;
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@ -1161,7 +1161,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
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char *cp;
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int val;
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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val = strtol(field[i], &cp, 10);
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if (errno == ERANGE)
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return DTERR_FIELD_OVERFLOW;
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@ -1921,7 +1921,7 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
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break;
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}
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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val = strtol(field[i], &cp, 10);
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if (errno == ERANGE)
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return DTERR_FIELD_OVERFLOW;
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@ -2465,14 +2465,14 @@ DecodeTime(char *str, int fmask, int *tmask, struct pg_tm * tm, fsec_t *fsec)
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*tmask = DTK_TIME_M;
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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tm->tm_hour = strtol(str, &cp, 10);
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if (errno == ERANGE)
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return DTERR_FIELD_OVERFLOW;
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if (*cp != ':')
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return DTERR_BAD_FORMAT;
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str = cp + 1;
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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tm->tm_min = strtol(str, &cp, 10);
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if (errno == ERANGE)
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return DTERR_FIELD_OVERFLOW;
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@ -2486,7 +2486,7 @@ DecodeTime(char *str, int fmask, int *tmask, struct pg_tm * tm, fsec_t *fsec)
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else
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{
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str = cp + 1;
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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tm->tm_sec = strtol(str, &cp, 10);
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if (errno == ERANGE)
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return DTERR_FIELD_OVERFLOW;
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@ -2540,7 +2540,7 @@ DecodeNumber(int flen, char *str, bool haveTextMonth, int fmask,
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*tmask = 0;
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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val = strtol(str, &cp, 10);
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if (errno == ERANGE)
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return DTERR_FIELD_OVERFLOW;
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@ -2830,7 +2830,7 @@ DecodeTimezone(char *str, int *tzp)
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if (*str != '+' && *str != '-')
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return DTERR_BAD_FORMAT;
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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hr = strtol(str + 1, &cp, 10);
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if (errno == ERANGE)
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return DTERR_TZDISP_OVERFLOW;
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@ -2838,7 +2838,7 @@ DecodeTimezone(char *str, int *tzp)
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/* explicit delimiter? */
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if (*cp == ':')
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{
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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min = strtol(cp + 1, &cp, 10);
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if (errno == ERANGE)
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return DTERR_TZDISP_OVERFLOW;
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@ -3085,7 +3085,7 @@ DecodeInterval(char **field, int *ftype, int nf, int *dtype, struct pg_tm * tm,
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case DTK_DATE:
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case DTK_NUMBER:
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errno = 0;
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errno = 0; /* avoid checking LONG_MIN/LONG_MAX */
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val = strtol(field[i], &cp, 10);
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if (errno == ERANGE)
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return DTERR_FIELD_OVERFLOW;
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.116 2005/11/17 22:14:52 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.117 2005/12/01 20:06:37 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -278,7 +278,7 @@ float4in(PG_FUNCTION_ARGS)
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while (*num != '\0' && isspace((unsigned char) *num))
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num++;
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errno = 0;
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errno = 0; /* avoid checking HUGE_VAL */
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val = strtod(num, &endptr);
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/* did we not see anything that looks like a double? */
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@ -445,7 +445,7 @@ float8in(PG_FUNCTION_ARGS)
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while (*num != '\0' && isspace((unsigned char) *num))
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num++;
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errno = 0;
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errno = 0; /* avoid checking HUGE_VAL */
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val = strtod(num, &endptr);
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/* did we not see anything that looks like a double? */
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@ -1476,7 +1476,7 @@ dpow(PG_FUNCTION_ARGS)
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* We must check both for errno getting set and for a NaN result, in order
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* to deal with the vagaries of different platforms...
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*/
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = pow(arg1, arg2);
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if (errno != 0
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#ifdef HAVE_FINITE
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@ -1506,7 +1506,7 @@ dexp(PG_FUNCTION_ARGS)
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* to deal with the vagaries of different platforms. Also, a zero result
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* implies unreported underflow.
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*/
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = exp(arg1);
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if (errno != 0 || result == 0.0
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#ifdef HAVE_FINITE
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@ -1590,7 +1590,7 @@ dacos(PG_FUNCTION_ARGS)
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float8 arg1 = PG_GETARG_FLOAT8(0);
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float8 result;
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = acos(arg1);
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if (errno != 0
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#ifdef HAVE_FINITE
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@ -1615,7 +1615,7 @@ dasin(PG_FUNCTION_ARGS)
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float8 arg1 = PG_GETARG_FLOAT8(0);
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float8 result;
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = asin(arg1);
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if (errno != 0
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#ifdef HAVE_FINITE
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@ -1640,7 +1640,7 @@ datan(PG_FUNCTION_ARGS)
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float8 arg1 = PG_GETARG_FLOAT8(0);
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float8 result;
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = atan(arg1);
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if (errno != 0
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#ifdef HAVE_FINITE
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@ -1666,7 +1666,7 @@ datan2(PG_FUNCTION_ARGS)
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float8 arg2 = PG_GETARG_FLOAT8(1);
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float8 result;
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = atan2(arg1, arg2);
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if (errno != 0
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#ifdef HAVE_FINITE
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@ -1691,7 +1691,7 @@ dcos(PG_FUNCTION_ARGS)
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float8 arg1 = PG_GETARG_FLOAT8(0);
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float8 result;
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = cos(arg1);
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if (errno != 0
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#ifdef HAVE_FINITE
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@ -1716,7 +1716,7 @@ dcot(PG_FUNCTION_ARGS)
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float8 arg1 = PG_GETARG_FLOAT8(0);
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float8 result;
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = tan(arg1);
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if (errno != 0 || result == 0.0
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#ifdef HAVE_FINITE
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@ -1742,7 +1742,7 @@ dsin(PG_FUNCTION_ARGS)
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float8 arg1 = PG_GETARG_FLOAT8(0);
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float8 result;
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = sin(arg1);
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if (errno != 0
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#ifdef HAVE_FINITE
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@ -1767,7 +1767,7 @@ dtan(PG_FUNCTION_ARGS)
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float8 arg1 = PG_GETARG_FLOAT8(0);
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float8 result;
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errno = 0;
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errno = 0; /* avoid checking result for failure */
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result = tan(arg1);
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if (errno != 0
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#ifdef HAVE_FINITE
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