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add cmappr() and missing complex tan, cot, sec, csc in liblcac

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Added complex multiple approximation function to commath.c so
that users of libcalc may directly round complex number to
nearest multiple of a given real number:

    E_FUNC COMPLEX *cmappr(COMPLEX *c, NUMBER *e, long rnd, bool cfree);

For example:

    COMPLEX *c;             /* complex number to round to nearest epsilon */
    NUMBER *eps;            /* epsilon rounding precision */
    COMPLEX *res;           /* c rounded to nearest epsilon */
    long rnd = 24L;         /* a common rounding mode */
    bool ok_to_free;        /* true ==> free c, false ==> do not free c */

    ...

    res = cmappr(c, eps, ok_to_free);

The complex trigonometric functions tan, cot, sec, csc were implemented
in func.c as calls to complex sin and complex cos.  We added the
direct calls to comfunc.c so that users of libcalc may
call them directly:

    E_FUNC COMPLEX *c_tan(COMPLEX *c, NUMBER *eps);
    E_FUNC COMPLEX *c_cot(COMPLEX *c, NUMBER *eps);
    E_FUNC COMPLEX *c_sec(COMPLEX *c, NUMBER *eps);
    E_FUNC COMPLEX *c_cot(COMPLEX *c, NUMBER *eps);
This commit is contained in:
Landon Curt Noll
2023-09-10 22:54:50 -07:00
parent a722b5cca7
commit bf730f5518
11 changed files with 559 additions and 106 deletions
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@@ -185,6 +185,34 @@ The following are the changes from calc version 2.14.3.5 to date:
Expanded the calc regression test suite test 34dd to test various
real and complex values for sin, cos, tan, cot, sec, csc.
Added complex multiple approximation function to commath.c so
that users of libcalc may directly round complex number to
nearest multiple of a given real number:
E_FUNC COMPLEX *cmappr(COMPLEX *c, NUMBER *e, long rnd, bool cfree);
For example:
COMPLEX *c; /* complex number to round to nearest epsilon */
NUMBER *eps; /* epsilon rounding precision */
COMPLEX *res; /* c rounded to nearest epsilon */
long rnd = 24L; /* a common rounding mode */
bool ok_to_free; /* true ==> free c, false ==> do not free c */
...
res = cmappr(c, eps, ok_to_free);
The complex trigonometric functions tan, cot, sec, csc were
implemented in func.c as calls to complex sin and complex cos.
We added the following direct calls to comfunc.c so that users
of libcalc may call them directly:
E_FUNC COMPLEX *c_tan(COMPLEX *c, NUMBER *eps);
E_FUNC COMPLEX *c_cot(COMPLEX *c, NUMBER *eps);
E_FUNC COMPLEX *c_sec(COMPLEX *c, NUMBER *eps);
E_FUNC COMPLEX *c_cot(COMPLEX *c, NUMBER *eps);
The following are the changes from calc version 2.14.3.4 to 2.14.3.5: