Added libs/minisat (copy of minisat git master)

libs/minisat/XAlloc.h

@@ -0,0 +1,45 @@
+/****************************************************************************************[XAlloc.h]
+Copyright (c) 2009-2010, Niklas Sorensson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+associated documentation files (the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or
+substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
+OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+**************************************************************************************************/
+
+
+#ifndef Minisat_XAlloc_h
+#define Minisat_XAlloc_h
+
+#include <errno.h>
+#include <stdlib.h>
+
+namespace Minisat {
+
+//=================================================================================================
+// Simple layer on top of malloc/realloc to catch out-of-memory situtaions and provide some typing:
+
+class OutOfMemoryException{};
+static inline void* xrealloc(void *ptr, size_t size)
+{
+    void* mem = realloc(ptr, size);
+    if (mem == NULL && errno == ENOMEM){
+        throw OutOfMemoryException();
+    }else
+        return mem;
+}
+
+//=================================================================================================
+}
+
+#endif