database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-26 12:21:12 +03:00
Code Activity

Accept and output '-Infinity' as well as 'Infinity', per long-ago

Browse Source 
suggestion from Ross Reedstrom.  Still needs work to make those symbols
convert to actual IEEE infinities (on machines where such things exist).
This commit is contained in:
Tom Lane
2001-06-02 20:18:30 +00:00
parent 1df27f9a59
commit 277a47ad0f
1 changed files with 22 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/backend/utils/adt/float.c
View File

@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/float.c,v 1.72 2001/06/02 17:12:12 tgl Exp $ * $Header: /cvsroot/pgsql/src/backend/utils/adt/float.c,v 1.73 2001/06/02 20:18:30 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -199,7 +199,14 @@ float4in(PG_FUNCTION_ARGS)
val = strtod(num, &endptr); val = strtod(num, &endptr);
if (*endptr != '\0') if (*endptr != '\0')
{ {
/* Shouldn't we accept "NaN" or "Infinity" for float4? */ /*
* XXX we should accept "Infinity" and "-Infinity" too, but what
* are the correct values to assign? HUGE_VAL will provoke an
* error from CheckFloat4Val.
*/
if (strcasecmp(num, "NaN") == 0)
val = NAN;
else
elog(ERROR, "Bad float4 input format '%s'", num); elog(ERROR, "Bad float4 input format '%s'", num);
} }
else else
@ -226,11 +233,15 @@ float4out(PG_FUNCTION_ARGS)
{ {
float4 num = PG_GETARG_FLOAT4(0); float4 num = PG_GETARG_FLOAT4(0);
char *ascii = (char *) palloc(MAXFLOATWIDTH + 1); char *ascii = (char *) palloc(MAXFLOATWIDTH + 1);
int infflag;
if (isnan(num)) if (isnan(num))
PG_RETURN_CSTRING(strcpy(ascii, "NaN")); PG_RETURN_CSTRING(strcpy(ascii, "NaN"));
if (isinf(num)) infflag = isinf(num);
if (infflag > 0)
PG_RETURN_CSTRING(strcpy(ascii, "Infinity")); PG_RETURN_CSTRING(strcpy(ascii, "Infinity"));
if (infflag < 0)
PG_RETURN_CSTRING(strcpy(ascii, "-Infinity"));
sprintf(ascii, "%.*g", FLT_DIG, num); sprintf(ascii, "%.*g", FLT_DIG, num);
PG_RETURN_CSTRING(ascii); PG_RETURN_CSTRING(ascii);
@ -258,6 +269,8 @@ float8in(PG_FUNCTION_ARGS)
val = NAN; val = NAN;
else if (strcasecmp(num, "Infinity") == 0) else if (strcasecmp(num, "Infinity") == 0)
val = HUGE_VAL; val = HUGE_VAL;
else if (strcasecmp(num, "-Infinity") == 0)
val = -HUGE_VAL;
else else
elog(ERROR, "Bad float8 input format '%s'", num); elog(ERROR, "Bad float8 input format '%s'", num);
} }
@ -282,11 +295,15 @@ float8out(PG_FUNCTION_ARGS)
{ {
float8 num = PG_GETARG_FLOAT8(0); float8 num = PG_GETARG_FLOAT8(0);
char *ascii = (char *) palloc(MAXDOUBLEWIDTH + 1); char *ascii = (char *) palloc(MAXDOUBLEWIDTH + 1);
int infflag;
if (isnan(num)) if (isnan(num))
PG_RETURN_CSTRING(strcpy(ascii, "NaN")); PG_RETURN_CSTRING(strcpy(ascii, "NaN"));
if (isinf(num)) infflag = isinf(num);
if (infflag > 0)
PG_RETURN_CSTRING(strcpy(ascii, "Infinity")); PG_RETURN_CSTRING(strcpy(ascii, "Infinity"));
if (infflag < 0)
PG_RETURN_CSTRING(strcpy(ascii, "-Infinity"));
sprintf(ascii, "%.*g", DBL_DIG, num); sprintf(ascii, "%.*g", DBL_DIG, num);
PG_RETURN_CSTRING(ascii); PG_RETURN_CSTRING(ascii);