From ff3967f932f170a8b13c339bb812c65b0e6fd909 Mon Sep 17 00:00:00 2001
From: hasufell <hasufell@hasufell.de>
Date: Mon, 26 May 2014 21:38:39 +0200
Subject: [PATCH] STRING: provide function for deleting strings

---
 src/Makefile      |  3 ++-
 src/ntru_string.c | 10 ++++++++++
 src/ntru_string.h | 12 ++++++++++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/Makefile b/src/Makefile
index bed8d03..eefa212 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -37,7 +37,8 @@ endif
 LIBS += -L. -lgmp -lmpfr -lm
 
 # objects
-PQC_OBJS = poly.o mem.o encrypt.o decrypt.o keypair.o ascii_poly.o file.o
+PQC_OBJS = poly.o mem.o encrypt.o decrypt.o keypair.o ascii_poly.o file.o \
+		   ntru_string.o
 PQC_HEADERS = err.h poly.h context.h encrypt.h decrypt.h keypair.h \
 			  ascii_poly.h common.h file.h ntru_string.h
 # CUNIT_OBJS = cunit.o
diff --git a/src/ntru_string.c b/src/ntru_string.c
index ff91c05..6e1ae20 100644
--- a/src/ntru_string.c
+++ b/src/ntru_string.c
@@ -25,3 +25,13 @@
  * like C strings and provides operations on it.
  * @brief string type and operations
  */
+
+#include "ntru_string.h"
+
+
+void
+string_delete(string *del_string)
+{
+	free(del_string->ptr);
+	free(del_string);
+}
diff --git a/src/ntru_string.h b/src/ntru_string.h
index d052b39..294eec7 100644
--- a/src/ntru_string.h
+++ b/src/ntru_string.h
@@ -51,4 +51,16 @@ struct string {
 };
 
 
+/**
+ * Delete the inner structure
+ * of the string and frees the string
+ * itself from the heap. Must not be
+ * called on stack variables.
+ *
+ * @param del_string the string to delete
+ */
+void
+string_delete(string *del_string);
+
+
 #endif /* NTRU_STRING_H */