pw_base64

This module provides functions for encoding, decoding, and validating Base64 data as specified by RFC 3548 and RFC 4648.

Note

The documentation for this module is currently incomplete.

constexpr size_t pw::base64::EncodedSize(size_t binary_size_bytes)

Returns:

The size of the given number of bytes when encoded as Base64. Base64 encodes 3-byte groups into 4-character strings. The final group is padded to be 3 bytes if it only has 1 or 2.

constexpr size_t pw::base64::MaxDecodedSize(size_t base64_size_bytes)

Calculates the maximum size of Base64-encoded data after decoding.

pre:

base64_size_bytes must be a multiple of 4, since Base64 encodes 3-byte groups into 4-character strings.

Parameters:

base64_size_bytes – [in] The size of the Base64-encoded data.

Returns:

The maximum size of the Base64-encoded data represented by base64_bytes_size after decoding. If the last 3-byte group has padding, the actual decoded size will be 1 or 2 bytes less than the value returned by MaxDecodedSize().