--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/strdup.hh	Fri Jul 29 16:05:03 2011 +0100
@@ -0,0 +1,58 @@
+/*
+ *  matiec - a compiler for the programming languages defined in IEC 61131-3
+ *
+ *  Copyright (C) 2011  Mario de Sousa (msousa@fe.up.pt)
+ *
+ *  This program 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * This code is made available on the understanding that it will not be
+ * used in safety-critical situations without a full and competent review.
+ */
+
+
+/*******************************************/
+/* String Duplication Utility Functions... */
+/*******************************************/
+
+
+
+#ifndef STRDUP__H
+#define STRDUP__H
+
+#include <stdlib.h>   /* required for malloc() */
+#include <string.h>   /* required for strcat() & strlen() */
+
+/*
+ * Join two strings together. Allocate space with malloc(3).
+ */
+static char *strdup2(const char *a, const char *b) {
+  char *res = (char *)malloc(strlen(a) + strlen(b) + 1);
+
+  if (res == NULL) return NULL;
+  return strcat(strcpy(res, a), b);
+}
+
+/*
+ * Join three strings together. Allocate space with malloc(3).
+ */
+static char *strdup3(const char *a, const char *b, const char *c) {
+  char *res = (char *)malloc(strlen(a) + strlen(b) + strlen(c) + 1);
+
+  if (res == NULL) return NULL;
+  return strcat(strcat(strcpy(res, a), b), c);
+}
+
+
+#endif /* STRDUP__H */