/* base64.h -- Encode binary data using printable characters.
- Copyright (C) 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004-2006, 2009-2011 Free Software Foundation, Inc.
Written by Simon Josefsson.
This program is free software; you can redistribute it and/or modify
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. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef BASE64_H
# define BASE64_H
/* Get size_t. */
-#include <stddef.h>
+# include <stddef.h>
/* Get bool. */
-#include <stdbool.h>
+# 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)
+# 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);
+ char *restrict out, size_t outlen);
extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out);
-extern bool base64_decode (const char *restrict in, size_t inlen,
- char *restrict out, size_t * outlen);
+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)
-extern bool base64_decode_alloc (const char *in, size_t inlen,
- char **out, size_t * outlen);
+#define base64_decode_alloc(in, inlen, out, outlen) \
+ base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
#endif /* BASE64_H */