/* * Copyright (C) 2016 The Android Open Source Project * * 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 <android/util/protobuf.h> namespace android { namespace util { uint8_t read_wire_type(uint32_t varint) { return (uint8_t) (varint & WIRE_TYPE_MASK); } uint32_t read_field_id(uint32_t varint) { return varint >> FIELD_ID_SHIFT; } size_t get_varint_size(uint64_t varint) { size_t size = 1; while ((varint & ~0x7F)) { size++; varint >>= 7; } return size; } uint8_t* write_raw_varint(uint8_t* buf, uint64_t val) { uint8_t* p = buf; while (true) { if ((val & ~0x7F) == 0) { *p++ = (uint8_t)val; return p; } else { *p++ = (uint8_t)((val & 0x7F) | 0x80); val >>= 7; } } } uint8_t* write_length_delimited_tag_header(uint8_t* buf, uint32_t fieldId, size_t size) { buf = write_raw_varint(buf, (fieldId << FIELD_ID_SHIFT) | WIRE_TYPE_LENGTH_DELIMITED); buf = write_raw_varint(buf, size); return buf; } } // util } // android