1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "protobuf.h" 18 19 uint8_t* 20 write_raw_varint(uint8_t* buf, uint32_t val) 21 { 22 uint8_t* p = buf; 23 while (true) { 24 if ((val & ~0x7F) == 0) { 25 *p++ = (uint8_t)val; 26 return p; 27 } else { 28 *p++ = (uint8_t)((val & 0x7F) | 0x80); 29 val >>= 7; 30 } 31 } 32 } 33 34 uint8_t* 35 write_length_delimited_tag_header(uint8_t* buf, uint32_t fieldId, size_t size) 36 { 37 buf = write_raw_varint(buf, (fieldId << 3) | 2); 38 buf = write_raw_varint(buf, size); 39 return buf; 40 } 41 42
