MacSpice for Mac

Technical Improvements

• Extend library of unit-tests.
• Refactor hot string-intensive functions to work with StrView types. (A StrView is a memory-friendly, non-owning constainer for string slices.)
• Refactor front-end code (subcircuit expansion, netlist parsing) to use StrView-based methods resulting in a more performant, maintainable / testable code base.
• Modify behaviour of tilde-expansion to leave word unchanged when no match is found.
• Tweak definitions of some layout constraints in the MacSpice Settings panel.
• Revise the hashtab() function to fix minor issues, increase maximum key lengths to use size_t values.
• Refactor translation of SPICE2 'POLY' sources to B-sources (polytrans.c).
• Improvements to 'dynamicbuffs.c' library. Split 'add_n_to buffer()' out of 'add_to_buffer()'.
• Replace iterative renormalisation loops in cktpzstr.c with single-pass operations.
• Replace 'struct card' and 'struct line' with single type-definition everywhere.
• Decouple the 'original' and 'expanded' decks displayed by the 'listing' command.
• Remove legacy memory debugging / checking code, which has been superseded by the macOS malloc() tools.
• Refactor the error-signalling system to reduce heap-memory churn.
• Convert #define'd E_ERRNO values to enum type.

Bugs Fixed

• Inconsistent display of error messages attached to lines by 'listing' command.
• CLI pos() function doesn't implement Kleene logic consistently, e.g. pos(0/0) should return NaN not zero.
• Updating from pre-v3.3.5 versions of MacSpice on older versions of macOS corrupted the colour preferences and required manual deletion of the user defaults plist in ~/Library/Preferences/.
• Memory leak when 'B-source' device instances contain syntax errors.
• Memory leak when 'edit' command is used to edit or create a source file.
• Unhandled edge cases in the 'deftype' and 'settype' commands. E.g. a memory leak when 'deftype v angle' used without a 'units' argument.
• Command 'set' does not strip quoted tokens in its contracted manner.
• Minor issues detected by new 'tokenise–requote–tokenise' round-trip unit tests.
• Inconsistencies in the precedence table for the CLI expression parser.
• Warnings for out-of-range arguments to CLI power ('^') operator can depend on uninitialised memory.
• Regression: 'plotname.v(x)' syntax not recognised as a valid alias for 'v(plotname.x)'.
• AppKit life-cycle race arising when a queued -drawRect: arriving after DestroyGraph(id) has done its work in -windowWillClose. (Symptomless but might have caused issue in future.)
• Empty 'do/dowhile' (infinite) loops do not respond to user (⌘-.) interrupts.
• Misleading error message when '.model' line was prefixed with whitespace.
• The 'rusage' command occaionally displays time differences incorrectly when repeatedly called in quick succession.
• Semicolon operator behaves inappropriately when operands are complex vectors of differing lengths.
• Crash evaluating non-existent list elements, e.g. 'echo "bar = $&bar[0][1]"'.
• Regression: Missing warning when Spice 3 legacy behaviour (fill-down with last element) is used to balance mismatched arguments. [Build 378].

Full list of changes available here