#include "ProtoUtil.h"

size_t varint_length(uint32_t v) {
    if (v == 0) return 1;

    size_t logcounter = 0;
    while (v > 0) {
        ++logcounter;
        v >>= 7;
    }
    return logcounter;
}

size_t encode_varint(std::vector<uint8_t>& dst, uint32_t value) {
    constexpr uint8_t MSB = 0b10000000;

    uint32_t n = value;
    size_t i = 0;

    while (n >= 0x80) {
        dst.push_back(MSB | static_cast<uint8_t>(n & 0x7F));
        ++i;
        n >>= 7;
    }

    dst.push_back(static_cast<uint8_t>(n));
    return i + 1;
}

uint32_t pack_wire_tag(uint32_t field_id, uint8_t wire_type) {
    return (field_id << 3) | static_cast<uint32_t>(wire_type);
}