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Commit277b2ea

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committed
Add comments about why errno is set to zero.
1 parent814acfc commit277b2ea

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2 files changed

+24
-24
lines changed

2 files changed

+24
-24
lines changed

‎src/backend/utils/adt/datetime.c

Lines changed: 11 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.162 2005/12/0117:56:34 tgl Exp $
11+
* $PostgreSQL: pgsql/src/backend/utils/adt/datetime.c,v 1.163 2005/12/0120:06:37 momjian Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -1013,7 +1013,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
10131013
if (tzp==NULL)
10141014
returnDTERR_BAD_FORMAT;
10151015

1016-
errno=0;
1016+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
10171017
val=strtol(field[i],&cp,10);
10181018
if (errno==ERANGE)
10191019
returnDTERR_FIELD_OVERFLOW;
@@ -1161,7 +1161,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
11611161
char*cp;
11621162
intval;
11631163

1164-
errno=0;
1164+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
11651165
val=strtol(field[i],&cp,10);
11661166
if (errno==ERANGE)
11671167
returnDTERR_FIELD_OVERFLOW;
@@ -1921,7 +1921,7 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
19211921
break;
19221922
}
19231923

1924-
errno=0;
1924+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
19251925
val=strtol(field[i],&cp,10);
19261926
if (errno==ERANGE)
19271927
returnDTERR_FIELD_OVERFLOW;
@@ -2465,14 +2465,14 @@ DecodeTime(char *str, int fmask, int *tmask, struct pg_tm * tm, fsec_t *fsec)
24652465

24662466
*tmask=DTK_TIME_M;
24672467

2468-
errno=0;
2468+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
24692469
tm->tm_hour=strtol(str,&cp,10);
24702470
if (errno==ERANGE)
24712471
returnDTERR_FIELD_OVERFLOW;
24722472
if (*cp!=':')
24732473
returnDTERR_BAD_FORMAT;
24742474
str=cp+1;
2475-
errno=0;
2475+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
24762476
tm->tm_min=strtol(str,&cp,10);
24772477
if (errno==ERANGE)
24782478
returnDTERR_FIELD_OVERFLOW;
@@ -2486,7 +2486,7 @@ DecodeTime(char *str, int fmask, int *tmask, struct pg_tm * tm, fsec_t *fsec)
24862486
else
24872487
{
24882488
str=cp+1;
2489-
errno=0;
2489+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
24902490
tm->tm_sec=strtol(str,&cp,10);
24912491
if (errno==ERANGE)
24922492
returnDTERR_FIELD_OVERFLOW;
@@ -2540,7 +2540,7 @@ DecodeNumber(int flen, char *str, bool haveTextMonth, int fmask,
25402540

25412541
*tmask=0;
25422542

2543-
errno=0;
2543+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
25442544
val=strtol(str,&cp,10);
25452545
if (errno==ERANGE)
25462546
returnDTERR_FIELD_OVERFLOW;
@@ -2830,15 +2830,15 @@ DecodeTimezone(char *str, int *tzp)
28302830
if (*str!='+'&&*str!='-')
28312831
returnDTERR_BAD_FORMAT;
28322832

2833-
errno=0;
2833+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
28342834
hr=strtol(str+1,&cp,10);
28352835
if (errno==ERANGE)
28362836
returnDTERR_TZDISP_OVERFLOW;
28372837

28382838
/* explicit delimiter? */
28392839
if (*cp==':')
28402840
{
2841-
errno=0;
2841+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
28422842
min=strtol(cp+1,&cp,10);
28432843
if (errno==ERANGE)
28442844
returnDTERR_TZDISP_OVERFLOW;
@@ -3085,7 +3085,7 @@ DecodeInterval(char **field, int *ftype, int nf, int *dtype, struct pg_tm * tm,
30853085

30863086
caseDTK_DATE:
30873087
caseDTK_NUMBER:
3088-
errno=0;
3088+
errno=0;/* avoid checking LONG_MIN/LONG_MAX */
30893089
val=strtol(field[i],&cp,10);
30903090
if (errno==ERANGE)
30913091
returnDTERR_FIELD_OVERFLOW;

‎src/backend/utils/adt/float.c

Lines changed: 13 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.116 2005/11/17 22:14:52 tgl Exp $
11+
* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.117 2005/12/01 20:06:37 momjian Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -278,7 +278,7 @@ float4in(PG_FUNCTION_ARGS)
278278
while (*num!='\0'&&isspace((unsignedchar)*num))
279279
num++;
280280

281-
errno=0;
281+
errno=0;/* avoid checking HUGE_VAL */
282282
val=strtod(num,&endptr);
283283

284284
/* did we not see anything that looks like a double? */
@@ -445,7 +445,7 @@ float8in(PG_FUNCTION_ARGS)
445445
while (*num!='\0'&&isspace((unsignedchar)*num))
446446
num++;
447447

448-
errno=0;
448+
errno=0;/* avoid checking HUGE_VAL */
449449
val=strtod(num,&endptr);
450450

451451
/* did we not see anything that looks like a double? */
@@ -1476,7 +1476,7 @@ dpow(PG_FUNCTION_ARGS)
14761476
* We must check both for errno getting set and for a NaN result, in order
14771477
* to deal with the vagaries of different platforms...
14781478
*/
1479-
errno=0;
1479+
errno=0;/* avoid checking result for failure */
14801480
result=pow(arg1,arg2);
14811481
if (errno!=0
14821482
#ifdefHAVE_FINITE
@@ -1506,7 +1506,7 @@ dexp(PG_FUNCTION_ARGS)
15061506
* to deal with the vagaries of different platforms. Also, a zero result
15071507
* implies unreported underflow.
15081508
*/
1509-
errno=0;
1509+
errno=0;/* avoid checking result for failure */
15101510
result=exp(arg1);
15111511
if (errno!=0||result==0.0
15121512
#ifdefHAVE_FINITE
@@ -1590,7 +1590,7 @@ dacos(PG_FUNCTION_ARGS)
15901590
float8arg1=PG_GETARG_FLOAT8(0);
15911591
float8result;
15921592

1593-
errno=0;
1593+
errno=0;/* avoid checking result for failure */
15941594
result=acos(arg1);
15951595
if (errno!=0
15961596
#ifdefHAVE_FINITE
@@ -1615,7 +1615,7 @@ dasin(PG_FUNCTION_ARGS)
16151615
float8arg1=PG_GETARG_FLOAT8(0);
16161616
float8result;
16171617

1618-
errno=0;
1618+
errno=0;/* avoid checking result for failure */
16191619
result=asin(arg1);
16201620
if (errno!=0
16211621
#ifdefHAVE_FINITE
@@ -1640,7 +1640,7 @@ datan(PG_FUNCTION_ARGS)
16401640
float8arg1=PG_GETARG_FLOAT8(0);
16411641
float8result;
16421642

1643-
errno=0;
1643+
errno=0;/* avoid checking result for failure */
16441644
result=atan(arg1);
16451645
if (errno!=0
16461646
#ifdefHAVE_FINITE
@@ -1666,7 +1666,7 @@ datan2(PG_FUNCTION_ARGS)
16661666
float8arg2=PG_GETARG_FLOAT8(1);
16671667
float8result;
16681668

1669-
errno=0;
1669+
errno=0;/* avoid checking result for failure */
16701670
result=atan2(arg1,arg2);
16711671
if (errno!=0
16721672
#ifdefHAVE_FINITE
@@ -1691,7 +1691,7 @@ dcos(PG_FUNCTION_ARGS)
16911691
float8arg1=PG_GETARG_FLOAT8(0);
16921692
float8result;
16931693

1694-
errno=0;
1694+
errno=0;/* avoid checking result for failure */
16951695
result=cos(arg1);
16961696
if (errno!=0
16971697
#ifdefHAVE_FINITE
@@ -1716,7 +1716,7 @@ dcot(PG_FUNCTION_ARGS)
17161716
float8arg1=PG_GETARG_FLOAT8(0);
17171717
float8result;
17181718

1719-
errno=0;
1719+
errno=0;/* avoid checking result for failure */
17201720
result=tan(arg1);
17211721
if (errno!=0||result==0.0
17221722
#ifdefHAVE_FINITE
@@ -1742,7 +1742,7 @@ dsin(PG_FUNCTION_ARGS)
17421742
float8arg1=PG_GETARG_FLOAT8(0);
17431743
float8result;
17441744

1745-
errno=0;
1745+
errno=0;/* avoid checking result for failure */
17461746
result=sin(arg1);
17471747
if (errno!=0
17481748
#ifdefHAVE_FINITE
@@ -1767,7 +1767,7 @@ dtan(PG_FUNCTION_ARGS)
17671767
float8arg1=PG_GETARG_FLOAT8(0);
17681768
float8result;
17691769

1770-
errno=0;
1770+
errno=0;/* avoid checking result for failure */
17711771
result=tan(arg1);
17721772
if (errno!=0
17731773
#ifdefHAVE_FINITE

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