DB48X: HP48-like RPL implementation for DM42

[c3d]

https://github.com/c3d/DB48X-on-DM42/rel...tag/v0.7.2

This release introduces four relatively significant features:

1. An Equation Library
2. A more general Library
3. Character menus
4. A character modification catalog
   

There are also a number of bug fixes and improvements.

Features

• The Equation Library is similar in principle to what is found in the HP50G. It is intended to store equations covering a variety of topics. The Equation Library is accessible using the EQS key (? '()'). It is presently only very sparsely populated, but a future release should add the equations listed in Chapter 5 of the HP50G Advanced User's Reference Manual. Elements of the Equation Library appear as named Equation Objects. The Equation Library is configured by file config/equations.csv.
• The Library is similar to the Equation Library, but for all kinds of objects such as programs or code snippets. The Library is accessible using the LIB key (? VAR). It can be used to customize your calculator, and is intended to play the roles of the CST variable (quick access to common features) and Library Objects / XLIB (external extensions to RPL). Elements of the Library appear as named Library Objects. The Library is configured by file config/library.csv.
• The Characters Menu lets you enter Unicode characters easily, by presenting various classes of characters, such as RPL, Greek or Punct. The Characters Menus is accessible using the CHAR key (? 2). It can be used to enter international characters (e.g. Greek or Cyrillic), as well as special characters such as arrows or blocks. The Characters Menu is configured by file config/characters.csv.
• The Characters Catalog appears when the Catalog is active and the cursor is inside some text object. It gives you access to characters that are visually close to the character on the left of the cursor. For example, after typing A, the presented choices include À, a or α. The Characters Catalog is configured by file config/characters.csv.
• compare: Add comparisons for true and false values
• Add TEVAL command (timed evaluation)
  
  

Bug fixes

• Do not add unnecessary parentheses in ratios, e.g. (A+B)/(X-Y)
• Make sure we can save back the configuration files correctly
• Improve access path checks to accept config:constants.csv.
• Avoid syntax error in 1/(1+x) due to 1/ being seen as a fraction
• unitfile: Remove slight risk of bad menu display after garbage collection
• date/time: Make sure we save the stack and last args for Date, Time, ...
• parser: Skip spacing when parsing numbers (to parse back →Text result)
• time: Fix rendering of DMS time in lists, matrices, vectors
• catalog: Fix a subtle bug on DM32 leading to a crash using the catalog
  

Improvements

• constants: Get values of special π and e by name
• constants: Add prefix in editor to identify constants, equations and xlib
• constants: Represent constants with an index for memory and performance
• constants: Parse units containing text
• constants: Allow RCL to recall a constant value
• units: Direct insertion of units after numbers
• menu: Update Roll and RollDown menu entries
• show: Show all decimals for decimal values
• help: Display the correct on-line help topic for constants
• catalog: Use less memory for the sorted IDs
• integrate: Use numerical computations for faster convergence
• locals: Improve error message for bad locals
• graph: Improve graphical rendering of constants (bold) and equations
• graph: Do not add unnecessary parentheses in ratios
• tests: Add tests for characters menu/catalog
• tests: Fix the . vs 0. test
• ui: Do not enter DMS inside text
• tests: Display disabled tests in gray
• catalog: Keep a single spelling, e.g. no add duplicates
• tests: Add extra delay in the wait for update
• makefile: Add dependency of 'all' to the decimal constants
• save: Improve rendering control when saving files
• stack: Do not save stack in plot, integration or solver
• debug: Disable debugging when launching a program from function key
• simulator: Avoid piling up QT draw requests
• doc: Update performance numbers for 1M loops
• simulator: Add sound support
• simulator: Lazy screen refresh
• dmcp: Add UI refresh callback
• simulator: Move QT-dependent code out of dmcp.cpp
• Add reduced font
• runtime: Various changes to isolate QT build from the rest