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-rw-r--r--vos/vos.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/vos/vos.c b/vos/vos.c
index a72614c3f3..9876d705b4 100644
--- a/vos/vos.c
+++ b/vos/vos.c
@@ -2,6 +2,8 @@
/* Written 02-01-02 by Nick Ing-Simmons (nick@ing-simmons.net) */
/* Modified 02-03-27 by Paul Green (Paul.Green@stratus.com) to
add socketpair() dummy. */
+/* Modified 02-04-24 by Paul Green (Paul.Green@stratus.com) to
+ have pow(0,0) return 1, avoiding c-1471. */
/* End of modification history */
#include <errno.h>
@@ -35,3 +37,22 @@ socketpair (int family, int type, int protocol, int fd[2]) {
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));
+}