tree af8f2dd9ae4a7b85a24097fef40ef2399dd7394a
parent 4e8078c007d3b749d8dccfd629a03fc759411906
author Matt Spinler <spinler@us.ibm.com> 1562701453 -0500
committer Matt Spinler <spinler@us.ibm.com> 1564163911 -0500

PEL: Add Stream class to manipulate PEL data

This stream inserts data into and extracts data from the vector<uint8_t>
that it is given in its contructor.  That vector is how PEL data is
stored.  This object takes care of the endian conversion for fields that
require it, as PEL data is big endian.

On writes, it will expand the vector if necessary.

An exception will be thrown an invalid access is attempted, such as
trying to extract a value when at the end of the data.

It provides >> and << operators for common data types, as well as
read()/write() functions when using other types.

Example:

std::vector<uint8_t> data;
Stream stream{data};

uin32_t value = 0x12345678;
stream << value;

stream.offset(0);

uint32_t newValue;
stream >> newValue;

assert(value == newValue);

uint8_t buf[3000] = {0};
stream.write(buf, 3000);

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I8dc5566371749b45a260389a564836433323eef8