intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 89 insertions, 0 deletions

diff --git a/contrib/libs/base64/plain64/libbase64.h b/contrib/libs/base64/plain64/libbase64.h
new file mode 100644
index 00000000000..27a9ce8626b
--- /dev/null
+++ b/contrib/libs/base64/plain64/libbase64.h
@@ -0,0 +1,89 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct plain64_base64_state {
+	int eof;
+	int bytes;
+	unsigned char carry;
+};
+
+/* Wrapper function to encode a plain string of given length. Output is written
+ * to *out without trailing zero. Output length in bytes is written to *outlen.
+ * The buffer in `out` has been allocated by the caller and is at least 4/3 the
+ * size of the input. See above for `flags`; set to 0 for default operation: */
+void plain64_base64_encode
+	( const char		*src
+	, size_t		 srclen
+	, char			*out
+	, size_t		*outlen
+	) ;
+
+/* Call this before calling base64_stream_encode() to init the state. See above
+ * for `flags`; set to 0 for default operation: */
+void plain64_base64_stream_encode_init
+	( struct plain64_base64_state	*state
+	) ;
+
+/* Encodes the block of data of given length at `src`, into the buffer at
+ * `out`. Caller is responsible for allocating a large enough out-buffer; it
+ * must be at least 4/3 the size of the in-buffer, but take some margin. Places
+ * the number of new bytes written into `outlen` (which is set to zero when the
+ * function starts). Does not zero-terminate or finalize the output. */
+void plain64_base64_stream_encode
+	( struct plain64_base64_state	*state
+	, const char		*src
+	, size_t		 srclen
+	, char			*out
+	, size_t		*outlen
+	) ;
+
+/* Finalizes the output begun by previous calls to `base64_stream_encode()`.
+ * Adds the required end-of-stream markers if appropriate. `outlen` is modified
+ * and will contain the number of new bytes written at `out` (which will quite
+ * often be zero). */
+void plain64_base64_stream_encode_final
+	( struct plain64_base64_state	*state
+	, char			*out
+	, size_t		*outlen
+	) ;
+
+/* Wrapper function to decode a plain string of given length. Output is written
+ * to *out without trailing zero. Output length in bytes is written to *outlen.
+ * The buffer in `out` has been allocated by the caller and is at least 3/4 the
+ * size of the input. See above for `flags`, set to 0 for default operation: */
+int plain64_base64_decode
+	( const char		*src
+	, size_t		 srclen
+	, char			*out
+	, size_t		*outlen
+	) ;
+
+/* Call this before calling base64_stream_decode() to init the state. See above
+ * for `flags`; set to 0 for default operation: */
+void plain64_base64_stream_decode_init
+	( struct plain64_base64_state	*state
+	) ;
+
+/* Decodes the block of data of given length at `src`, into the buffer at
+ * `out`. Caller is responsible for allocating a large enough out-buffer; it
+ * must be at least 3/4 the size of the in-buffer, but take some margin. Places
+ * the number of new bytes written into `outlen` (which is set to zero when the
+ * function starts). Does not zero-terminate the output. Returns 1 if all is
+ * well, and 0 if a decoding error was found, such as an invalid character.
+ * Returns -1 if the chosen codec is not included in the current build. Used by
+ * the test harness to check whether a codec is available for testing. */
+int plain64_base64_stream_decode
+	( struct plain64_base64_state	*state
+	, const char		*src
+	, size_t		 srclen
+	, char			*out
+	, size_t		*outlen
+	) ;
+
+#ifdef __cplusplus
+}
+#endif
+