Change 16170 by jhi@alpha on 2002/04/25 22:13:02
Subject: [PATCH] fix vos/vos.c to implement pow(0,0)
From: [EMAIL PROTECTED]
Date: Wed, 24 Apr 02 18:27 edt
Message-Id: <[EMAIL PROTECTED]>
Affected files ...
.... //depot/perl/vos/vos.c#3 edit
Differences ...
==== //depot/perl/vos/vos.c#3 (text) ====
Index: perl/vos/vos.c
--- perl/vos/vos.c.~1~ Thu Apr 25 16:30:05 2002
+++ perl/vos/vos.c Thu Apr 25 16:30:05 2002
@@ -2,6 +2,8 @@
/* Written 02-01-02 by Nick Ing-Simmons ([EMAIL PROTECTED]) */
/* Modified 02-03-27 by Paul Green ([EMAIL PROTECTED]) to
add socketpair() dummy. */
+/* Modified 02-04-24 by Paul Green ([EMAIL PROTECTED]) to
+ have pow(0,0) return 1, avoiding c-1471. */
/* End of modification history */
#include <errno.h>
@@ -35,3 +37,22 @@
errno = ENOSYS;
return -1;
}
+
+/* Supply a private version of the power function that returns 1
+ for x**0. This avoids c-1471. Abigail's Japh tests depend
+ on this fix. We leave all the other cases to the VOS C
+ runtime. */
+
+double s_crt_pow(double *x, double *y);
+
+double pow(x,y)
+double x, y;
+{
+ if (y == 0e0) /* c-1471 */
+ {
+ errno = EDOM;
+ return (1e0);
+ }
+
+ return(s_crt_pow(&x,&y));
+}
End of Patch.
