From: trevor_hansen <trevor_hansen@e59a4935-1847-0410-ae03-e826735625c1>
Date: Mon, 27 Feb 2012 12:56:07 +0000 (+0000)
Subject: Improvement. Sometimes the interface throws division by zero errors, making division... 
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=0830c37414d617d282b2e76406f9c7772980c5d9;p=francis%2Fstp.git

Improvement. Sometimes the interface throws division by zero errors, making division a total function avoids them. Thanks to Tom Bergan for reporting the problem.

git-svn-id: https://stp-fast-prover.svn.sourceforge.net/svnroot/stp-fast-prover/trunk/stp@1573 e59a4935-1847-0410-ae03-e826735625c1
---

diff --git a/src/c_interface/c_interface.cpp b/src/c_interface/c_interface.cpp
index bfbab66..52cade4 100644
--- a/src/c_interface/c_interface.cpp
+++ b/src/c_interface/c_interface.cpp
@@ -68,6 +68,12 @@ void vc_setInterfaceFlags(VC vc, enum ifaceflag_t f, int param_value) {
   }
 }
 
+void make_division_total(VC vc)
+{
+  bmstar b = (bmstar)(((stpstar)vc)->bm);
+  b->UserFlags.division_by_zero_returns_one_flag = true;
+}
+
 //Create a validity Checker. This is the global STPMgr
 VC vc_createValidityChecker(void) {
   CONSTANTBV::ErrCode c = CONSTANTBV::BitVector_Boot();
diff --git a/src/c_interface/c_interface.h b/src/c_interface/c_interface.h
index 2184727..57f7921 100644
--- a/src/c_interface/c_interface.h
+++ b/src/c_interface/c_interface.h
@@ -66,6 +66,10 @@ extern "C" {
   };
   void vc_setInterfaceFlags(VC vc, enum ifaceflag_t f, int param_value);
 
+  // defines division by zero to equal 1, x%0 to equal x.
+  // avoids division by zero errors.
+  void make_division_total(VC vc);
+
   //! Flags can be NULL
   VC vc_createValidityChecker(void);