in src/log_builder.c [94:105]
static unsigned scan_varint(unsigned len, const uint8_t *data)
{
unsigned i;
if (len > 10)
len = 10;
for (i = 0; i < len; i++)
if ((data[i] & 0x80) == 0)
break;
if (i == len)
return 0;
return i + 1;
}