[exim-cvs] Also ${eval:x % 0} fixed to not SIGFPE.

Commit:     a5b5269546e02d1f2e90000e79df8409d4f269db
Parent:     54e7ce4ad20a6977ee895a358259122bf3630090
Author:     Phil Pennock <pdp@???>
AuthorDate: Tue Apr 12 16:26:44 2011 -0400
Committer:  Phil Pennock <pdp@???>
CommitDate: Tue Apr 12 16:26:44 2011 -0400

    Also ${eval:x % 0} fixed to not SIGFPE.

    Pointed out by: Steven A. Reisman
---
 src/src/expand.c |   23 +++++++++++++----------
 1 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/src/src/expand.c b/src/src/expand.c
index 06e0eb0..fece8c1 100644
--- a/src/src/expand.c
+++ b/src/src/expand.c
@@ -3106,18 +3106,21 @@ if (*error == NULL)
     int op = *s++;
     int y = eval_op_unary(&s, decimal, error);
     if (*error != NULL) break;
-    if (op == '*') x *= y;
-      else if (op == '/')
+    if (op == '*')
+      x *= y;
+    else
+      {
+      if (y == 0)
         {
-        if (y == 0)
-          {
-          *error = US"divide by zero";
-          x = 0;
-          break;
-          }
-        x /= y;
+        *error = (op == '/') ? US"divide by zero" : US"modulo by zero";
+        x = 0;
+        break;
         }
-      else x %= y;
+      if (op == '/')
+        x /= y;
+      else
+        x %= y;
+      }
     }
   }
 *sptr = s;