3 * Copyright 2016 gRPC authors.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H
20 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H
22 #include <grpc/support/port_platform.h>
24 #include <grpc/slice.h>
27 struct grpc_base64_decode_context {
29 const uint8_t* input_cur;
30 const uint8_t* input_end;
33 /* Indicate if the decoder should handle the tail of input data*/
37 /* base64 decode a grpc_base64_decode_context util either input_end is reached
38 or output_end is reached. When input_end is reached, (input_end - input_cur)
39 is less than 4. When output_end is reached, (output_end - output_cur) is less
40 than 3. Returns false if decoding is failed. */
41 bool grpc_base64_decode_partial(struct grpc_base64_decode_context* ctx);
43 /* base64 decode a slice with pad chars. Returns a new slice, does not take
44 ownership of the input. Returns an empty slice if decoding is failed. */
45 grpc_slice grpc_chttp2_base64_decode(const grpc_slice& input);
47 /* base64 decode a slice without pad chars, data length is needed. Returns a new
48 slice, does not take ownership of the input. Returns an empty slice if
49 decoding is failed. */
50 grpc_slice grpc_chttp2_base64_decode_with_length(const grpc_slice& input,
51 size_t output_length);
53 /* Infer the length of decoded data from encoded data. */
54 size_t grpc_chttp2_base64_infer_length_after_decode(const grpc_slice& slice);
56 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H */