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The current behavior of the functions 'calc-display-strings', 'strings', and 'bstrings' is to skip any vector containing integers outside the Latin-1 range (0x00-0xFF). We introduce a custom variable 'calc-string-maximum-character' to replace this hard-coded maximum, and to allow vectors containing higher character codes to be displayed as strings. The default value of 0xFF preserves the existing behavior. * lisp/calc/calc.el (calc-string-maximum-character): Add custom variable 'calc-string-maximum-character'. * lisp/calc/calccomp.el (math-vector-is-string): Replace hard-coded maximum with 'calc-string-maximum-character', and the 'natnump' assertion with 'characterp'. The latter guards against the maximum being larger than '(max-char)', but not on invalid types of the maximum such as strings. * test/lisp/calc/calc-tests.el (calc-math-vector-is-string): Add tests for 'math-vector-is-string' using different values of 'calc-string-maximum-character'. * doc/misc/calc.texi (Quick Calculator, Strings, Customizing Calc): Add variable definition for 'calc-string-maximum-character' and reference thereof when discussing 'calc-display-strings'. Generalize a comment about string display and availability of 8-bit fonts. (Bug#78528) |
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