Add base extlib

1 files changed, 58 insertions, 0 deletions

diff --git a/src/extlib.c b/src/extlib.c
new file mode 100644
index 0000000..ee20d3e
--- /dev/null
+++ b/src/extlib.c
@@ -0,0 +1,58 @@
+/* extlib.c
+ *
+ * Copyright 2024 axtlos <axtlos@disroot.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * 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 Lesser General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-only
+ */
+
+#include "extlib.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#undef free
+#undef malloc
+
+void
+free_secure(void *__ptr, size_t ptrlen)
+{
+  memset (__ptr, 0, ptrlen);
+  free (__ptr);
+  return;
+}
+
+void *
+malloc_secure (size_t len)
+{
+  void *mem = malloc (len);
+  memset (mem, 0, len);
+  return mem;
+}
+
+void
+fcopy(FILE *f1, FILE *f2)
+{
+  char buffer[BUFSIZ];
+  size_t n;
+
+  while ((n = fread (buffer, sizeof (char), sizeof (buffer), f1)) > 0)
+  {
+    if (fwrite (buffer, sizeof (char), n, f2) != n) {
+      fprintf (stderr, "Failed to copy data");
+      return;
+    }
+  }
+}