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| author | Bruce Momjian <bruce@momjian.us> | 2005-12-01 20:06:37 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2005-12-01 20:06:37 +0000 |
| commit | 277b2ea32870f1f41d301460d30c26b4dbb2825b (patch) | |
| tree | b8e590156ce687c5bb47a84b0aeaf2fc39cb93aa /src/backend/utils/adt/float.c | |
| parent | 814acfcc3a5e891216de1a70f912b83268978734 (diff) | |
| download | postgresql-277b2ea32870f1f41d301460d30c26b4dbb2825b.tar.gz postgresql-277b2ea32870f1f41d301460d30c26b4dbb2825b.zip | |
Add comments about why errno is set to zero.
Diffstat (limited to 'src/backend/utils/adt/float.c')
| -rw-r--r-- | src/backend/utils/adt/float.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/src/backend/utils/adt/float.c b/src/backend/utils/adt/float.c index f77c54f9cca..62afe852f4b 100644 --- a/src/backend/utils/adt/float.c +++ b/src/backend/utils/adt/float.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.116 2005/11/17 22:14:52 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.117 2005/12/01 20:06:37 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -278,7 +278,7 @@ float4in(PG_FUNCTION_ARGS) while (*num != '\0' && isspace((unsigned char) *num)) num++; - errno = 0; + errno = 0; /* avoid checking HUGE_VAL */ val = strtod(num, &endptr); /* did we not see anything that looks like a double? */ @@ -445,7 +445,7 @@ float8in(PG_FUNCTION_ARGS) while (*num != '\0' && isspace((unsigned char) *num)) num++; - errno = 0; + errno = 0; /* avoid checking HUGE_VAL */ val = strtod(num, &endptr); /* did we not see anything that looks like a double? */ @@ -1476,7 +1476,7 @@ dpow(PG_FUNCTION_ARGS) * We must check both for errno getting set and for a NaN result, in order * to deal with the vagaries of different platforms... */ - errno = 0; + errno = 0; /* avoid checking result for failure */ result = pow(arg1, arg2); if (errno != 0 #ifdef HAVE_FINITE @@ -1506,7 +1506,7 @@ dexp(PG_FUNCTION_ARGS) * to deal with the vagaries of different platforms. Also, a zero result * implies unreported underflow. */ - errno = 0; + errno = 0; /* avoid checking result for failure */ result = exp(arg1); if (errno != 0 || result == 0.0 #ifdef HAVE_FINITE @@ -1590,7 +1590,7 @@ dacos(PG_FUNCTION_ARGS) float8 arg1 = PG_GETARG_FLOAT8(0); float8 result; - errno = 0; + errno = 0; /* avoid checking result for failure */ result = acos(arg1); if (errno != 0 #ifdef HAVE_FINITE @@ -1615,7 +1615,7 @@ dasin(PG_FUNCTION_ARGS) float8 arg1 = PG_GETARG_FLOAT8(0); float8 result; - errno = 0; + errno = 0; /* avoid checking result for failure */ result = asin(arg1); if (errno != 0 #ifdef HAVE_FINITE @@ -1640,7 +1640,7 @@ datan(PG_FUNCTION_ARGS) float8 arg1 = PG_GETARG_FLOAT8(0); float8 result; - errno = 0; + errno = 0; /* avoid checking result for failure */ result = atan(arg1); if (errno != 0 #ifdef HAVE_FINITE @@ -1666,7 +1666,7 @@ datan2(PG_FUNCTION_ARGS) float8 arg2 = PG_GETARG_FLOAT8(1); float8 result; - errno = 0; + errno = 0; /* avoid checking result for failure */ result = atan2(arg1, arg2); if (errno != 0 #ifdef HAVE_FINITE @@ -1691,7 +1691,7 @@ dcos(PG_FUNCTION_ARGS) float8 arg1 = PG_GETARG_FLOAT8(0); float8 result; - errno = 0; + errno = 0; /* avoid checking result for failure */ result = cos(arg1); if (errno != 0 #ifdef HAVE_FINITE @@ -1716,7 +1716,7 @@ dcot(PG_FUNCTION_ARGS) float8 arg1 = PG_GETARG_FLOAT8(0); float8 result; - errno = 0; + errno = 0; /* avoid checking result for failure */ result = tan(arg1); if (errno != 0 || result == 0.0 #ifdef HAVE_FINITE @@ -1742,7 +1742,7 @@ dsin(PG_FUNCTION_ARGS) float8 arg1 = PG_GETARG_FLOAT8(0); float8 result; - errno = 0; + errno = 0; /* avoid checking result for failure */ result = sin(arg1); if (errno != 0 #ifdef HAVE_FINITE @@ -1767,7 +1767,7 @@ dtan(PG_FUNCTION_ARGS) float8 arg1 = PG_GETARG_FLOAT8(0); float8 result; - errno = 0; + errno = 0; /* avoid checking result for failure */ result = tan(arg1); if (errno != 0 #ifdef HAVE_FINITE |