Fast QB64 base64 encoder & decoder

[a740g]

RETIRED! See this post.

This is a Base64 encode, decode, and resource loader library based on MODP_B64, a C-based super-fast Base64 encoder and decoder library.

The library has 4 functions:

Code: (Select All)

''' @brief Converts a normal STRING or binary data to a base64 STRING.

''' @param src The normal STRING or binary data to be converted.

''' @return The base64 STRING.

FUNCTION Base64_Encode$ (src AS STRING)



''' @brief Converts a base64 STRING to a normal STRING or binary data.

''' @param src The base64 STRING to be converted.

''' @return The normal STRING or binary data.

FUNCTION Base64_Decode$ (src AS STRING)



''' @brief Loads a binary file encoded with Bin2Data (CONST).

''' @param src The base64 STRING containing the encoded data.

''' @param ogSize The original size of the data.

''' @param isComp Whether the data is compressed.

''' @return The normal STRING or binary data.

FUNCTION Base64_LoadResourceString$ (src AS STRING, ogSize AS _UNSIGNED LONG, isComp AS _BYTE)



''' @brief Loads a binary file encoded with Bin2Data (DATA).

''' Usage:

'''  1. Encode the binary file with Bin2Data.

'''  2. Include the file or its contents.

'''  3. Load the file like so:

'''      Restore label_generated_by_bin2data

'''      Dim buffer As String

'''      buffer = Base64_LoadResourceData

''' @return The normal STRING or binary data.

FUNCTION Base64_LoadResourceData$

It's much faster than my earlier QB64-only implementation which you can find here: Something Tricky (qb64phoenix.com).

Here are some numbers from my Ryzen 5600X box.



I threw in Win32 API-based Base64 encoder & decoder wrappers for the benchmark. However, the library is cross-platform.

The numbers in the image are with C++ optimizations turned on. However, even with optimizations turned off MODP_B64 runs circles around Win32 and my earlier implementation.

The Bin2Data tool lives here: https://qb64phoenix.com/forum/showthread.php?tid=2228