These files are a group of independent source files, each aiming at specific tasks:

[InputFile.h] is a input text file format. We use a relaxed Json format, which aims to be user friendly to non-technical users of our codes. It servers as the slightly advanced input parser for Sir.h code described below (the alternative being a simple text stream). It also maintains compatibility with .mhd image headers and is used in our 3D image manipulation codes. The file defines two classes

• InputFile: main class
• mstream: a utility class used for duplicating messages into std::cout and an log file.

[typses.h] this file defines classes primarily for dealing with scientific data:

var3 is a template class which is used with alias names dbl3, float3 and int3, which represent 3D variants of double, float and int. For more general vector/tensor data types I use [VMMLib].

• var2 is 2D version of var3.

• piece is a simpler alternative to std::slice. It serves the same job that std::string_view serves in relation with std::string, but for std::vector. Essentially it an efficient wrapper around continuous data, and is used to do arithmetic operations on data stored as std::vector.

• Vars, used with alias names dbls, floats, dbl3s, is similar to piece, but keeps its own copy of the data rather than being a wrapper around other data. we use this primarily as an alternative to std::valarray which has an ugly syntax.

• varsOr This is only used in svplot library. It but is meant to serve as a container for optional data (with a default value) and contains a name for the data as well as a transform function. This is not an essential feature and needs further development and testing.

Some basic functions for statistical analysis of scalar data are also stored here.

[globals.h] Macros and utility functions for debugging, testing and calibration of C++ codes.