X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=vos%2Fvos.c;h=9876d705b4a7b0893b8f815f45bb00cfa076e468;hb=158b3652342ca691c9e3b061a1d78456ae1a9b4a;hp=a72614c3f32b45cea406f21de721346af0578498;hpb=a5f25d7aeb90fd429ad81529bb602f402d5f9724;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/vos/vos.c b/vos/vos.c
index a72614c..9876d70 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));
+}