decodeless (previously no-decode) is a collection of utility libraries for conveniently reading and writing large binary files via memory mapping. The data could be whatever you want, but there are performance benefits to writing raw C++ structures that can be read without any decoding/deserialization/parsing - hence the name "decodeless".

• offset_ptr provides convenient relational pointers that are implicitly valid within the file's address space

• writer combines:

  • allocator handles packing and aligning data when writing files and interfaces with...
  • mappedfile, a small cross platform memory mapping library that can also grow files so you don't need to compute the total size up front

  This is particularly convenient for writing files because you can populate relational structures after allocating them and the data they point to.

• header is a completely optional extensible file header (using offset_ptr) that also includes a unique ID, versioning and binary compatibility features

Component repositories can be used individually or combined. They do not include each other as git submodules.

Typical usage is combining writer and header to quickly write structured binary data to disk. Then using mappedfile to read them.