| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include "test/core/util/parse_hexstring.h" |
| #include <grpc/support/log.h> |
| |
| grpc_slice parse_hexstring(const char* hexstring) { |
| size_t nibbles = 0; |
| const char* p = 0; |
| uint8_t* out; |
| uint8_t temp; |
| grpc_slice slice; |
| |
| for (p = hexstring; *p; p++) { |
| nibbles += (*p >= '0' && *p <= '9') || (*p >= 'a' && *p <= 'f'); |
| } |
| |
| GPR_ASSERT((nibbles & 1) == 0); |
| |
| slice = grpc_slice_malloc(nibbles / 2); |
| out = GRPC_SLICE_START_PTR(slice); |
| |
| nibbles = 0; |
| temp = 0; |
| for (p = hexstring; *p; p++) { |
| if (*p >= '0' && *p <= '9') { |
| temp = (uint8_t)(temp << 4) | (uint8_t)(*p - '0'); |
| nibbles++; |
| } else if (*p >= 'a' && *p <= 'f') { |
| temp = (uint8_t)(temp << 4) | (uint8_t)(*p - 'a' + 10); |
| nibbles++; |
| } |
| if (nibbles == 2) { |
| *out++ = temp; |
| nibbles = 0; |
| } |
| } |
| |
| return slice; |
| } |