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.. _module-pw_varint:
The ``pw_varint`` module provides functions for encoding and decoding variable
length integers, or varints. For smaller values, varints require less memory
than a fixed-size encoding. For example, a 32-bit (4-byte) integer requires 1--5
bytes when varint-encoded.
`Protocol Buffers <>`_
use a variable-length encoding for integers.
* C
* C++11 (with :doc:`../pw_polyfill/docs`)
.. cpp:function:: size_t EncodedSize(uint64_t integer)
Returns the size of an integer when encoded as a varint. Works on both signed
and unsigned integers.
.. cpp:function:: size_t ZigZagEncodedSize(int64_t integer)
Returns the size of a signed integer when ZigZag encoded as a varint.
.. cpp:function:: uint64_t MaxValueInBytes(size_t bytes)
Returns the maximum integer value that can be encoded as a varint into the
specified number of bytes.
* ``pw_span``