add cyassl runtime alloc routines override, move to ctaocrypt so both can use, submitted by eof

ctaocrypt/src/cyassl_memory.c

@@ -0,0 +1,92 @@
+/* cyassl_memory.c 
+ *
+ * Copyright (C) 2006-2011 Sawtooth Consulting Ltd.
+ *
+ * This file is part of CyaSSL.
+ *
+ * CyaSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * CyaSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+#include "os_settings.h"
+
+#ifdef USE_CYASSL_MEMORY
+
+#include "cyassl_memory.h"
+
+
+/* Set these to default values initially. */
+static CyaSSL_Malloc_cb  malloc_function = 0;
+static CyaSSL_Free_cb    free_function = 0;
+static CyaSSL_Realloc_cb realloc_function = 0;
+
+int CyaSSL_SetAllocators(CyaSSL_Malloc_cb  mf,
+                         CyaSSL_Free_cb    ff,
+                         CyaSSL_Realloc_cb rf)
+{
+    int res = 0;
+
+    if (mf)
+        malloc_function = mf;
+	else
+        res = -1;
+
+    if (ff)
+        free_function = ff;
+    else
+        res = -1;
+
+    if (rf)
+        realloc_function = rf;
+    else
+        res = -1;
+
+    return res;
+}
+
+
+void* CyaSSL_Malloc(size_t size)
+{
+    void* res = 0;
+
+    if (malloc_function)
+        res = malloc_function(size);
+    else
+        res = malloc(size);
+
+    return res;
+}
+
+void CyaSSL_Free(void *ptr)
+{
+    if (free_function)
+        free_function(ptr);
+    else
+        free(ptr);
+}
+
+void* CyaSSL_Realloc(void *ptr, size_t size)
+{
+    void* res = 0;
+
+    if (realloc_function)
+        res = realloc_function(ptr, size);
+    else
+        res = realloc(ptr, size);
+
+    return res;
+}
+
+#endif /* USE_CYASSL_MEMORY */