1 /* 2 * 3 * Copyright 2016 gRPC authors. 4 * 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 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 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. 16 * 17 */ 18 19 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H 20 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include <grpc/slice.h> 25 #include <stdbool.h> 26 27 struct grpc_base64_decode_context { 28 /* input/output: */ 29 uint8_t* input_cur; 30 uint8_t* input_end; 31 uint8_t* output_cur; 32 uint8_t* output_end; 33 /* Indicate if the decoder should handle the tail of input data*/ 34 bool contains_tail; 35 }; 36 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); 42 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(grpc_slice input); 46 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(grpc_slice input, 51 size_t output_length); 52 53 /* Infer the length of decoded data from encoded data. */ 54 size_t grpc_chttp2_base64_infer_length_after_decode(const grpc_slice& slice); 55 56 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_BIN_DECODER_H */ 57
