Gnulib fuer Base64 hinzugefuegt

1 files changed, 61 insertions, 0 deletions

diff --git a/lib/base64.h b/lib/base64.h
new file mode 100644
index 0000000..63b6abc
--- /dev/null
+++ b/lib/base64.h
@@ -0,0 +1,61 @@
+/* base64.h -- Encode binary data using printable characters.
+   Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
+   Written by Simon Josefsson.
+
+   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, 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, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef BASE64_H
+# define BASE64_H
+
+/* Get size_t. */
+# include <stddef.h>
+
+/* Get bool. */
+# include <stdbool.h>
+
+/* This uses that the expression (n+(k-1))/k means the smallest
+   integer >= n/k, i.e., the ceiling of n/k.  */
+# define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
+
+struct base64_decode_context
+{
+  unsigned int i;
+  char buf[4];
+};
+
+extern bool isbase64 (char ch);
+
+extern void base64_encode (const char *restrict in, size_t inlen,
+			   char *restrict out, size_t outlen);
+
+extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out);
+
+extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
+
+extern bool base64_decode_ctx (struct base64_decode_context *ctx,
+			       const char *restrict in, size_t inlen,
+			       char *restrict out, size_t *outlen);
+
+extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
+				     const char *in, size_t inlen,
+				     char **out, size_t *outlen);
+
+#define base64_decode(in, inlen, out, outlen) \
+	base64_decode_ctx (NULL, in, inlen, out, outlen)
+
+#define base64_decode_alloc(in, inlen, out, outlen) \
+	base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
+
+#endif /* BASE64_H */