Release 0.4.2: Graphics and plotting

New features:

• Display folder marker on directories in VariablesMenu (#309)
• Alternate menu styles (sqare vs. rounded, single-line or 3-line) (#310)
• line, circle, ellipse, rect and rrect graphic commands (#311, #316, #318)
• linewidth, foreground, background graphic commands (#312)
• ppar special variables for user coordinates (#319)
• cllcd to clear the screen
• drax to draw plotting axes (#321)
• draw command to plot a function (#323)
• wait command to wait for a delay or key press (#324)

Bugs:

• Memory corruption when GC was triggered in a constructor (#325)
• Improve complex_promotion to avoid undesirable complex format changes
• Wrong pattern alignment in screen blitting operations
• Off by one error in width and height of blitter rectangles (#
• Conversion of fractions to uint32 (#321)
• Conversion between bignum and uint32 / int32

Improvements:

• Update dmcp commit to include a single fix for _exit
• Better rendering of folder menus, looks more like a folder (#310)
• Add .clang-format file to facilidate standard code formatting
• Add AUTHORS file
• Global variable lookup is now case-independent

Signed-off-by: Christophe de Dinechin christophe@dinechin.org

Release 0.4.1: Complex fixes

This is the first release with contributions from third parties. Special thanks to @camillew and @spiff72.

Features:

• type and typename commands (#285)
• bytes command (#284)
• →Num and →Q (#255, #282)
• if (#290) and iferr (#291)
• errm, errn, err0, doerr
• disp command (#296)
• crdir, pgdir, directories (#298)
• xroot (#276)
• DMCP5 support and DM32 build
• Remove the fixed-base base numbers (#274)
• Promotions of fractions to decimal128 (#266)
• Add the glyph for the ⇄ sign and xth root (on ∜ in Unicode)

Bug fixes:

• Avoid null-dereference for out-of-range complex cos (#253)
• Do not leave input argument for C->R and R->C conversions (#252)
• Fix display of "Seconds" marker in setup (#247)
• bignum: Read int values using correct endianness (#267)
• complex: More careful handling of angle units for polars (#251)
• display: Do not display trailing digit separator after rounding (#256)
• editor: Do not insert separators while typing symbols or text (#260)
• header: Fix off-by-one in month name (#248)
• help: Better scanning to find names with special Unicode characters (#286)
• logical: Check the type of stack level 2 (#272)
• modulo: Fix the case of -360 mod 360 (#264)
• settings: Default value for FractionSpacing is 5, not 3 (#261)
• state: Do not emit 'AutoSimplify' since it's the default (#257)
• state: Truncate state name for display (#246)
• ui: Repair drawing of current command
• Allow xshift-ENTER to insert text while not editing (#293)
• Multiplication by -1 had no effect (abusive simplification) (#288)
• Argument of negative numbers should be pi, not 0 (#287)
• Emit error message for 0/0 (#279)
• Restore missing glyphs for atan2 and hypot (#295)
• arg for (1+i) returned a negative value (#277)
• List + Text returns a list, not text (#297)
• Complex tan computation (#300)
• Wiring of some missing menu entries (thanks @camillew)

Improvements:

• Change license to GPLv3
• doc: Add section about Unicode support
• doc: Change the level of sub-headings
• doc: Document changes regarding list
• state: display state file name on the right of date/time (#258)
• tests: Run tests with default settings (#259)
• Rename graphics class to blitter
• Add 'make clangdb' makefile target
• Add documentation for arithmetic operations (+, -, *, /, ^)
• Expand documentation on autosimplify
• New SVG template contributed by @spiff72

Signed-off-by: Christophe de Dinechin christophe@dinechin.org

Full Changelog: v0.4...v0.4.1

Release 0.4: Matrices and equation rewrites

New features:

• Equation rewrite engine (#203, #213, #244)
  • Early implementation of expand and collect (#231)
• Transient alpha mode for quick alppha entry (#204, #215, #233, #237)
  (note that XEQ no longer automatically switches to alpha)
• Vector and array arithmetic (#26, #185, #190)
  • Determinant of square matrices (#187, #217)
  • Inverse of a square matrix (#180, #189, #201)
  • Euclidean norm for matrices and vectors (#188)
  • Component-wise multiplication and division of vectors (#181)
  • Binary operations between matrix / vector and constant (#183)
  • Matrix * vector (#195)
• Automatic simplification in basic operations (#197, #216, #221)
• Help knows how to render "yellow" and "blue" keys
• Contextual tool menu (#127) and contextual help (#162, #193)
• LastMenu (xshift-A) goes back in menu history (#165)
• Displaying date and time in the header (#123, #224)
• GET function on lists and arrays (#173)
• Concatenation and repetition of lists (#178)
• Apply standard functions to arrays and lists (#179, #182)
• Add limits to size of numbers and number of rewrites (#214)

Improvements:

• Better rendering of unimplemented menu functions (#218)
• Accelerate garbage collector (#219)
• Render polar arguments with explicit angle units (#119, #161)
• Update key layout for easier matrix / vector entry (#198)
• Render complex numbers with additive precedence (#222)

Bugs fixes:

• Fix cursor position for up/down movement (#159)
• Show help for R/S (Eval) and division keys (#157)
• Fix spacing for thousands (e.g 5000) (#137)
• Redraw editor after inserting variable name (#156)
• Draw alpha annunciator after busy cursor is cleared
• Refresh editor when going at beginning or end of text
• Parsing of Invert(X) (#163)
• Do not insert parenthese in editor after binary operators (#164)
• Correct parsing of π and imaginary unit (#145, #168, #169, #207, #208)
• Repair repeat for R/S as a space key (#199)
• Parsing of complex numbers in matrices (#205)
• Parsing of complex numbers in equations (#220, #224)
• Parsing of "fancy" power sign (#238)
• Computation of power with integer and negative exponent (#239)
• Refresh menu after NumberSpacing (#240)

Other:

• Various help file improvements:
  • Help now uses more standard mardown for keys
  • As a result, README.md now points to the built-in help on GitHub (#227)
  • Add acknowledgements to help file (#129), including link to HP Museum
  • Improve documentation of differences between RPL variants (#177, #192)
  • Add documentation for the Help command (#228)
  • Fix label for F6 key in help (#230)
  • Improve rendering of code font in help (#232)
• Improved test suite, now faster, more stable and detects more errors
• Fixes / adjustments to keyboard layout suggested by C47 team
• Use standard C++ iterators for programs and lists (#166, #242)
• Split source files for list, program, array and equation (#167)
• Unify precedence handling for parser and renderer
• Add "storytelling" file (#191) for video demos
• Update STATUS.md file (#200)
• Fix generation of fonts
• Fix subtle dereferencing bug in GC pointer
• Use C++ template metaprogramming to build RPL equations from C++ (#230)
• Use flags instread of range comparisons to check properties of objects (#234)
• Default settings when running "current test" (#150)
• Add rewrite_all to rewrite until convergence (#241, #243)
• Do not integrate random files in make dist.

Verse of the day:
The kingdom of heaven is like treasure hidden in a field.
When a man found it, he hid it again, and then in his joy went and sold
all he had and bought that field (Mt 13:44)

Signed-off-by: Christophe de Dinechin christophe@dinechin.org

Full Changelog: v0.3.1...v0.4

Release 0.3.1: Editor acceleration

Bug fixes:

• Avoid a beep on shift-ENTER (shifting Alpha mode)
• Do not drop top of stack if editing editor with EXIT
• Display factorial as a postfix (X! and not !X)
• Modulo on negative integers
• Computation of modulo for fractions
• Parsing of + at end of command-line (interpreted as number)
• Trailing zeros inserted if non-displayed significant digit

Features:

• Optimization of the text editor, now reasonably fast on battery
• Add ancillary functions to manage complex numbers
• Add pi function
• Respect angles settings in trigonometric functions
• Added Purge and PurgeAll to MemoryMenu
• Normalized angle for complex in polar form (sensitive to DEG/RAD/GRAD)

Other:

• Some rearranging of the menus (unfinished)
• Updated the proposed keyboard layout, notably with "Previous menu"
  and "Toolbox" (context-sensitive menu) keys, removal of duplicate
  "Stack" key assignment.
• Make GC and busy animation a bit faster to avoid skipping on battery

Signed-off-by: Christophe de Dinechin christophe@dinechin.org

Full Changelog: v0.3...v0.3.1

Release 0.3: Complex numbers

Bug fixes:

• CHS on second number on the command line (#105)
• program interruption when keys were pressed other than EXIT (#104)
• Rounding of 1.9999 displaying as 10.000 instead of 2.000 (#112)
• Memory corruption in logical operations on big numbers (#103, #107)
• Out of memory error when no spacing is present (#109)
• Strip trailing zeros introduced by rounding (#116, #117)
• Reject 0 SIG (displaying no significant digits)
• Potential crash in low-memory condition (#118)
• Removed useless "Program" menu in system menu (#120)
• Exit the state save/load menu after saving/loading (#122)
• Crash loading state file if no error was generated
• Detection of integer overflow in implementation of a^b (power)
• Evaluation of "ABC" 3 * was no longer working

Features:

• Complex numbers (#15)
• Render based numbers with base as subscript (#106)
• Change default spacing for fractional part to 5 digits (#108)
• Animation for long-running user programs and garbage collection (#115)
• xshift-EXIT saves state to disk (#113)
• Switch to three-level menus by default (#128)
• Generalization of pow with integer on right side
• Represent hypot and atan2 using ⊿ and ∠ operators
• Added sign function
• Change behavior of Shift-Enter (alpha), now cycles back to non-alpha

Other:

• Add keyboard cutout for tentative keyboard layout
• Vastly enhanced regression test suite (faster and more extensive)
• Fixed dependencies in Makefile for fonts
• Improved efficiency of arithmetic computations
• Added several characters to the base font
• Improve 'const'-safety in C++ code, garbage-collected pointers are const now

Signed-off-by: Christophe de Dinechin christophe@dinechin.org

Full Changelog: v0.2.4...v0.3

v0.2.4 - Dynamic number spacing while editing

Bug fixes:

• CHS removes negative sign instead of putting a + sign
• Fix crash when applying decimal functions to negative values (#101)
• Use default formatting when saving calculator state
• Repair rendering of FIX, SCI and ENG on the stack (#100)
• Fixes the selection of the editor's displayed rows and columns (#98, #99)
• Remove premature "too many digits" error message for decimal128 (#97)
• Do not terminate editing for self-inserting menus such as # (#96)
• Show B cursor for all base-36 digits (#95)
• Defensive coding against malformed UTF8 text rendering (#101)

Features:

• Show thousand separators while editing numnbers
• Render based numbers with a numerical postfix base indicator (#95)
• Parse numbers in arbitrary base, e.g. 3#212 (#95)

Full Changelog: v0.2.3...v0.2.4

Release 0.2.3 - For loops

Bug fixes:

• Memory corruption in division of large numbers (#70)
• Parsing 'X⁻¹+(Y²+Z³)' resulting in syntax error (#76)
• Parsing -80/60 resulting in 4/3 (sign lost) (#78)
• Large numbers written to state file had separators (#83)
• Render names on stack as 'ABC' instead of 'ABC' (#84)
• Evaluate names as 'ABC' and not ABC (#86)
• Directory corruption following purge (#87)
• Local blocks now always execute (#90)
• Correct spacing of control structures on stack

Features:

• Keyboard binding to create lists (#89)
• Implementation of for loops (#92)

Other:

• Solidified the test suite further, added many tests
• Added reference to FOSDEM talk to README.md
• Added Freedom Covenant to the repository

Signed-off-by: Christophe de Dinechin christophe@dinechin.org

v0.2.2 - Optimisations and stabilisation

Bugs fixed since v0.2.1:

• Fixed the while loop
  The test for the while loop was inverted
  The location of the end and repeat keywords was swapped

• Fixed bug in detection of multiplication overflow
  The computation of the factorial of 23 and up is now correct.

• Fixed bug mistakenly converting some fractions to integers
  For example, 2/17 INV would return 17 instead of 17/2

• Add spacing to large numbers
  A number that did not fit on 64-bit would not respect spacing settings

• Repaired the test suite
  Tests were setting-dependent, and would fail with default settings because
  they did not take number spacing into account.

Features implemented since v0.2.1:

• Implemented local variables, e.g. << -> A B C << A B - C * >> >>
  Local variables are a very fast way to reference data. Internally, they are
  represented by an offset to a known location, which makes them practically as
  fast as stack accesses, and much faster than global variable lookups.

• Implement the same function
  The same function detects if two objects are identical.
  Like the HP48, there are multiple "equality" variants:

  • same detects if two objects are binary-identical
  • == does the same, but dereference names
  • = is a mathematical equality (does not exist in HP48 RPL)

• Add feature to import ASCII versions of «, » and →
  In .48S files, you can use <<, >> and -> instead.

• Implement →List (stack to list)
  This was the last missing command to be able to execute the
  HP calculator's N-queens benchmark

• Better truncation of very large numbers when shown on stack
  A very large number, like the factorial of 64, would show up truncated
  at 80 digits, so the first digits shown were wrong.

• Various optimizations to make things a bit snappier, notably on battery power

  • Refactored the object model to use a simpler lookup mechanism

  • Implemented a C++ interface for arithmetic and functions, which will be
    useful when implementing complex number and matrix operations, and already
    simplified the code for operations such as abs or cubed.

  • Sime fine-tuning of LEB128 handling for types

  • Execution time for NQueens measured, reduced from about 980ms down
    to about 530ms.

Full Changelog: v0.2.1...v0.2.2

Version 0.2.1 - Add VERSION command

Add a VERSION command, and git-derived version string in the PGM file

Full Changelog: v0.2...v0.2.1

v0.2 - Fix problem when running on battery power

The primary reason for a v0.2 is that this solves #12, a hang on battery power. There are also major bug fixes on integer arithmetic, and a new formatting of numbers.

Full Changelog: v0.1...v0.2