mirror of https://github.com/postgres/postgres
Localize our dependencies on the way to create NAN or INFINITY.
Per recent proposal to pghackers.
This commit is contained in:
Tom Lane
parent
89ab5c4abf
commit
1bc2d544b9
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@ -755,7 +755,7 @@ seg_cmp(SEG * a, SEG * b)
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* a->lower == b->lower, so consider type of boundary.
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*
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* A '-' lower bound is < any other kind (this could only be relevant if
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* -HUGE is used as a regular data value). A '<' lower bound is < any
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* -HUGE_VAL is used as a regular data value). A '<' lower bound is < any
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* other kind except '-'. A '>' lower bound is > any other kind.
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*/
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if (a->l_ext != b->l_ext)
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@ -813,7 +813,7 @@ seg_cmp(SEG * a, SEG * b)
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* a->upper == b->upper, so consider type of boundary.
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*
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* A '-' upper bound is > any other kind (this could only be relevant if
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* HUGE is used as a regular data value). A '<' upper bound is < any
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* HUGE_VAL is used as a regular data value). A '<' upper bound is < any
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* other kind. A '>' upper bound is > any other kind except '-'.
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*/
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if (a->u_ext != b->u_ext)
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@ -6,10 +6,6 @@
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#include <math.h>
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#include "segdata.h"
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#ifdef __CYGWIN__
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#define HUGE HUGE_VAL
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#endif /* __CYGWIN__ */
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#undef yylex /* falure to redefine yylex will result in calling the */
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#define yylex seg_yylex /* wrong scanner when running inside postgres backend */
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@ -86,7 +82,7 @@ range:
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boundary RANGE {
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((SEG *)result)->lower = $1.val;
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((SEG *)result)->upper = HUGE;
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((SEG *)result)->upper = HUGE_VAL;
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((SEG *)result)->l_sigd = $1.sigd;
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((SEG *)result)->u_sigd = 0;
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((SEG *)result)->l_ext = ( $1.ext ? $1.ext : '\0' );
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@ -94,7 +90,7 @@ range:
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}
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RANGE boundary {
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((SEG *)result)->lower = -HUGE;
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((SEG *)result)->lower = -HUGE_VAL;
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((SEG *)result)->upper = $2.val;
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((SEG *)result)->l_sigd = 0;
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((SEG *)result)->u_sigd = $2.sigd;
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@ -7,17 +7,23 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/port/qnx4/isnan.c,v 1.4 2003/11/29 19:51:54 pgsql Exp $
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* $PostgreSQL: pgsql/src/backend/port/qnx4/isnan.c,v 1.5 2004/03/15 03:29:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "c.h"
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unsigned char __nan[8] = __nan_bytes;
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#include <math.h>
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#ifndef __nan_bytes
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#define __nan_bytes { 0, 0, 0, 0, 0, 0, 0xf8, 0x7f }
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#endif /* __nan_bytes */
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static unsigned char __nan[8] = __nan_bytes;
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int
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isnan(double dsrc)
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{
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return !memcmp(&dsrc, &NAN, sizeof(double));
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return memcmp(&dsrc, __nan, sizeof(double)) == 0;
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}
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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 1.100 2004/03/14 05:22:52 neilc Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.101 2004/03/15 03:29:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -54,9 +54,8 @@
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#include <ctype.h>
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#include <errno.h>
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#include <float.h> /* faked on sunos4 */
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#include <float.h>
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#include <math.h>
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#include <limits.h>
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/* for finite() on Solaris */
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#ifdef HAVE_IEEEFP_H
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@ -70,19 +69,11 @@
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#include "utils/builtins.h"
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#ifndef HAVE_CBRT
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static double cbrt(double x);
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#endif /* HAVE_CBRT */
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#ifndef M_PI
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/* from my RH5.2 gcc math.h file - thomas 2000-04-03 */
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#define M_PI 3.14159265358979323846
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#endif
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#ifndef NAN
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#define NAN (0.0/0.0)
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#endif
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#ifndef SHRT_MAX
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#define SHRT_MAX 32767
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#endif
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@ -109,9 +100,78 @@ int extra_float_digits = 0; /* Added to DBL_DIG or FLT_DIG */
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static void CheckFloat4Val(double val);
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static void CheckFloat8Val(double val);
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static int is_infinite(double val);
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static int float4_cmp_internal(float4 a, float4 b);
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static int float8_cmp_internal(float8 a, float8 b);
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#ifndef HAVE_CBRT
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static double cbrt(double x);
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#endif /* HAVE_CBRT */
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/*
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* Routines to provide reasonably platform-independent handling of
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* infinity and NaN. We assume that isinf() and isnan() are available
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* and work per spec. (On some platforms, we have to supply our own;
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* see src/port.) However, generating an Infinity or NaN in the first
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* place is less well standardized; pre-C99 systems tend not to have C99's
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* INFINITY and NAN macros. We centralize our workarounds for this here.
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*/
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double
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get_float8_infinity(void)
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{
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#ifdef INFINITY
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/* C99 standard way */
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return (double) INFINITY;
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#else
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/*
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* On some platforms, HUGE_VAL is an infinity, elsewhere it's just the
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* largest normal double. We assume forcing an overflow will get us
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* a true infinity.
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*/
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return (double) (HUGE_VAL * HUGE_VAL);
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#endif
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}
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float
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get_float4_infinity(void)
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{
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#ifdef INFINITY
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/* C99 standard way */
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return (float) INFINITY;
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#else
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/*
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* On some platforms, HUGE_VAL is an infinity, elsewhere it's just the
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* largest normal double. We assume forcing an overflow will get us
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* a true infinity.
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*/
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return (float) (HUGE_VAL * HUGE_VAL);
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#endif
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}
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double
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get_float8_nan(void)
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{
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#ifdef NAN
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/* C99 standard way */
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return (double) NAN;
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#else
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/* Assume we can get a NAN via zero divide */
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return (double) (0.0 / 0.0);
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#endif
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}
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float
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get_float4_nan(void)
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{
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#ifdef NAN
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/* C99 standard way */
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return (float) NAN;
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#else
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/* Assume we can get a NAN via zero divide */
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return (float) (0.0 / 0.0);
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#endif
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}
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/*
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* Returns -1 if 'val' represents negative infinity, 1 if 'val'
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@ -120,7 +180,7 @@ static int float8_cmp_internal(float8 a, float8 b);
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* does not specify that isinf() needs to distinguish between positive
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* and negative infinity.
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*/
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static int
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int
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is_infinite(double val)
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{
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int inf = isinf(val);
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@ -134,6 +194,7 @@ is_infinite(double val)
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return -1;
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}
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/*
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* check to see if a float4 val is outside of the FLOAT4_MIN,
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* FLOAT4_MAX bounds.
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@ -237,17 +298,17 @@ float4in(PG_FUNCTION_ARGS)
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*/
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if (strncasecmp(num, "NaN", 3) == 0)
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{
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val = NAN;
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val = get_float4_nan();
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endptr = num + 3;
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}
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else if (strncasecmp(num, "Infinity", 8) == 0)
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{
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val = HUGE_VAL;
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val = get_float4_infinity();
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endptr = num + 8;
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}
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else if (strncasecmp(num, "-Infinity", 9) == 0)
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{
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val = -HUGE_VAL;
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val = - get_float4_infinity();
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endptr = num + 9;
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}
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else
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@ -402,17 +463,17 @@ float8in(PG_FUNCTION_ARGS)
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*/
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if (strncasecmp(num, "NaN", 3) == 0)
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{
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val = NAN;
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val = get_float8_nan();
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endptr = num + 3;
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}
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else if (strncasecmp(num, "Infinity", 8) == 0)
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{
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val = HUGE_VAL;
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val = get_float8_infinity();
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endptr = num + 8;
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}
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else if (strncasecmp(num, "-Infinity", 9) == 0)
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{
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val = -HUGE_VAL;
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val = - get_float8_infinity();
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endptr = num + 9;
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}
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else
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@ -14,7 +14,7 @@
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* Copyright (c) 1998-2003, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/numeric.c,v 1.71 2004/02/04 01:11:47 neilc Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/numeric.c,v 1.72 2004/03/15 03:29:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -42,15 +42,6 @@
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*/
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/* ----------
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* Local definitions
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* ----------
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*/
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#ifndef NAN
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#define NAN (0.0/0.0)
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#endif
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/* ----------
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* Local data types
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*
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@ -1790,7 +1781,7 @@ numeric_float8(PG_FUNCTION_ARGS)
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Datum result;
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if (NUMERIC_IS_NAN(num))
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PG_RETURN_FLOAT8(NAN);
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PG_RETURN_FLOAT8(get_float8_nan());
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tmp = DatumGetCString(DirectFunctionCall1(numeric_out,
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NumericGetDatum(num)));
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@ -1811,7 +1802,7 @@ numeric_float8_no_overflow(PG_FUNCTION_ARGS)
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double val;
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if (NUMERIC_IS_NAN(num))
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PG_RETURN_FLOAT8(NAN);
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PG_RETURN_FLOAT8(get_float8_nan());
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val = numeric_to_double_no_overflow(num);
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@ -1850,7 +1841,7 @@ numeric_float4(PG_FUNCTION_ARGS)
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Datum result;
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if (NUMERIC_IS_NAN(num))
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PG_RETURN_FLOAT4((float4) NAN);
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PG_RETURN_FLOAT4(get_float4_nan());
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tmp = DatumGetCString(DirectFunctionCall1(numeric_out,
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NumericGetDatum(num)));
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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/timestamp.c,v 1.100 2004/03/05 02:41:14 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.101 2004/03/15 03:29:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -20,10 +20,6 @@
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#include <errno.h>
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#include <float.h>
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#include <limits.h>
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/* for finite() on Solaris */
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#ifdef HAVE_IEEEFP_H
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#include <ieeefp.h>
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#endif
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#include "access/hash.h"
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#include "access/xact.h"
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@ -9,18 +9,8 @@
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#define strncasecmp strnicmp
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#ifndef NAN
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#ifndef __nan_bytes
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#define __nan_bytes { 0, 0, 0, 0, 0, 0, 0xf8, 0x7f }
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#endif /* __nan_bytes */
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extern unsigned char __nan[8];
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#define NAN (*(const double *) __nan)
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#endif /* NAN */
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typedef u_short ushort;
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extern int isnan(double dsrc);
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extern long random(void);
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extern void srandom(unsigned int seed);
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@ -1,4 +1,4 @@
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/* $PostgreSQL: pgsql/src/include/port/solaris.h,v 1.10 2003/12/23 03:31:30 momjian Exp $ */
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/* $PostgreSQL: pgsql/src/include/port/solaris.h,v 1.11 2004/03/15 03:29:22 tgl Exp $ */
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/*
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* Sort this out for all operating systems some time. The __xxx
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@ -35,24 +35,3 @@
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#define BYTE_ORDER LITTLE_ENDIAN
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#endif
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#endif
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#ifndef NAN
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#if defined(__GNUC__) && defined(__i386__)
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#ifndef __nan_bytes
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#define __nan_bytes { 0, 0, 0, 0, 0, 0, 0xf8, 0x7f }
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#endif
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#define NAN \
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(__extension__ ((union { unsigned char __c[8]; double __d; }) \
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{ __nan_bytes }).__d)
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#else
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/* not GNUC and i386 */
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#define NAN (0.0/0.0)
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#endif /* GCC. */
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#endif /* not NAN */
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.234 2004/02/03 08:29:57 joe Exp $
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* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.235 2004/03/15 03:29:22 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -240,6 +240,12 @@ extern Datum bttext_pattern_cmp(PG_FUNCTION_ARGS);
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/* float.c */
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extern DLLIMPORT int extra_float_digits;
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extern double get_float8_infinity(void);
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extern float get_float4_infinity(void);
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extern double get_float8_nan(void);
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extern float get_float4_nan(void);
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extern int is_infinite(double val);
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extern Datum float4in(PG_FUNCTION_ARGS);
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extern Datum float4out(PG_FUNCTION_ARGS);
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extern Datum float4recv(PG_FUNCTION_ARGS);
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