[gs-cvs] rev 7139 - trunk/gs/src

[lpd at ghostscript.com]

Author: lpd
Date: 2006-10-30 20:29:18 -0800 (Mon, 30 Oct 2006)
New Revision: 7139

Modified:
   trunk/gs/src/zmath.c
Log:
Makes 0 0 exp return 1.0 rather than signalling undefinedresult, to match
Adobe interpreters.  Fixes a discrepancy in PS3 CET 25-07-1.


Modified: trunk/gs/src/zmath.c
===================================================================
--- trunk/gs/src/zmath.c	2006-10-30 22:20:55 UTC (rev 7138)
+++ trunk/gs/src/zmath.c	2006-10-31 04:29:18 UTC (rev 7139)
@@ -147,11 +147,12 @@
 
     if (code < 0)
 	return code;
-    if (args[0] == 0.0 && args[1] == 0.0)
-	return_error(e_undefinedresult);
     if (args[0] < 0.0 && modf(args[1], &ipart) != 0.0)
 	return_error(e_undefinedresult);
-    result = pow(args[0], args[1]);
+    if (args[0] == 0.0 && args[1] == 0.0)
+	result = 1.0;		/* match Adobe; can't rely on C library */
+    else
+	result = pow(args[0], args[1]);
     make_real(op - 1, result);
     pop(1);
     return 0;