* but not of any interest to the user of the library. */
/*
- * GiNaC Copyright (C) 1999-2005 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2020 Johannes Gutenberg University Mainz, Germany
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
return k;
}
+/** Compute the multinomial coefficient n!/(p1!*p2!*...*pk!) where
+ * n = p1+p2+...+pk, i.e. p is a partition of n.
+ */
+const numeric
+multinomial_coefficient(const std::vector<unsigned> & p)
+{
+ numeric n = 0, d = 1;
+ for (auto & it : p) {
+ n = n.add(numeric(it));
+ d = d.mul(factorial(numeric(it)));
+ }
+ return factorial(n).div(d);
+}
//////////
// flyweight chest of numbers is initialized here:
library_init::library_init()
{
if (count++==0) {
- (_num_120_p = new numeric(-120))->setflag(status_flags::dynallocated);
- (_num_60_p = new numeric(-60))->setflag(status_flags::dynallocated);
- (_num_48_p = new numeric(-48))->setflag(status_flags::dynallocated);
- (_num_30_p = new numeric(-30))->setflag(status_flags::dynallocated);
- (_num_25_p = new numeric(-25))->setflag(status_flags::dynallocated);
- (_num_24_p = new numeric(-24))->setflag(status_flags::dynallocated);
- (_num_20_p = new numeric(-20))->setflag(status_flags::dynallocated);
- (_num_18_p = new numeric(-18))->setflag(status_flags::dynallocated);
- (_num_15_p = new numeric(-15))->setflag(status_flags::dynallocated);
- (_num_12_p = new numeric(-12))->setflag(status_flags::dynallocated);
- (_num_11_p = new numeric(-11))->setflag(status_flags::dynallocated);
- (_num_10_p = new numeric(-10))->setflag(status_flags::dynallocated);
- (_num_9_p = new numeric(-9))->setflag(status_flags::dynallocated);
- (_num_8_p = new numeric(-8))->setflag(status_flags::dynallocated);
- (_num_7_p = new numeric(-7))->setflag(status_flags::dynallocated);
- (_num_6_p = new numeric(-6))->setflag(status_flags::dynallocated);
- (_num_5_p = new numeric(-5))->setflag(status_flags::dynallocated);
- (_num_4_p = new numeric(-4))->setflag(status_flags::dynallocated);
- (_num_3_p = new numeric(-3))->setflag(status_flags::dynallocated);
- (_num_2_p = new numeric(-2))->setflag(status_flags::dynallocated);
- (_num_1_p = new numeric(-1))->setflag(status_flags::dynallocated);
- (_num_1_2_p = new numeric(-1,2))->setflag(status_flags::dynallocated);
- (_num_1_3_p = new numeric(-1,3))->setflag(status_flags::dynallocated);
- (_num_1_4_p = new numeric(-1,4))->setflag(status_flags::dynallocated);
- (_num0_p = new numeric(0))->setflag(status_flags::dynallocated);
+ _num_120_p = (const numeric *)&dynallocate<numeric>(-120);
+ _num_60_p = (const numeric *)&dynallocate<numeric>(-60);
+ _num_48_p = (const numeric *)&dynallocate<numeric>(-48);
+ _num_30_p = (const numeric *)&dynallocate<numeric>(-30);
+ _num_25_p = (const numeric *)&dynallocate<numeric>(-25);
+ _num_24_p = (const numeric *)&dynallocate<numeric>(-24);
+ _num_20_p = (const numeric *)&dynallocate<numeric>(-20);
+ _num_18_p = (const numeric *)&dynallocate<numeric>(-18);
+ _num_15_p = (const numeric *)&dynallocate<numeric>(-15);
+ _num_12_p = (const numeric *)&dynallocate<numeric>(-12);
+ _num_11_p = (const numeric *)&dynallocate<numeric>(-11);
+ _num_10_p = (const numeric *)&dynallocate<numeric>(-10);
+ _num_9_p = (const numeric *)&dynallocate<numeric>(-9);
+ _num_8_p = (const numeric *)&dynallocate<numeric>(-8);
+ _num_7_p = (const numeric *)&dynallocate<numeric>(-7);
+ _num_6_p = (const numeric *)&dynallocate<numeric>(-6);
+ _num_5_p = (const numeric *)&dynallocate<numeric>(-5);
+ _num_4_p = (const numeric *)&dynallocate<numeric>(-4);
+ _num_3_p = (const numeric *)&dynallocate<numeric>(-3);
+ _num_2_p = (const numeric *)&dynallocate<numeric>(-2);
+ _num_1_p = (const numeric *)&dynallocate<numeric>(-1);
+ _num_1_2_p = (const numeric *)&dynallocate<numeric>(-1,2);
+ _num_1_3_p = (const numeric *)&dynallocate<numeric>(-1,3);
+ _num_1_4_p = (const numeric *)&dynallocate<numeric>(-1,4);
+ _num0_p = (const numeric *)&dynallocate<numeric>(0);
_num0_bp = _num0_p; // Cf. class ex default ctor.
- (_num1_4_p = new numeric(1,4))->setflag(status_flags::dynallocated);
- (_num1_3_p = new numeric(1,3))->setflag(status_flags::dynallocated);
- (_num1_2_p = new numeric(1,2))->setflag(status_flags::dynallocated);
- (_num1_p = new numeric(1))->setflag(status_flags::dynallocated);
- (_num2_p = new numeric(2))->setflag(status_flags::dynallocated);
- (_num3_p = new numeric(3))->setflag(status_flags::dynallocated);
- (_num4_p = new numeric(4))->setflag(status_flags::dynallocated);
- (_num5_p = new numeric(5))->setflag(status_flags::dynallocated);
- (_num6_p = new numeric(6))->setflag(status_flags::dynallocated);
- (_num7_p = new numeric(7))->setflag(status_flags::dynallocated);
- (_num8_p = new numeric(8))->setflag(status_flags::dynallocated);
- (_num9_p = new numeric(9))->setflag(status_flags::dynallocated);
- (_num10_p = new numeric(10))->setflag(status_flags::dynallocated);
- (_num11_p = new numeric(11))->setflag(status_flags::dynallocated);
- (_num12_p = new numeric(12))->setflag(status_flags::dynallocated);
- (_num15_p = new numeric(15))->setflag(status_flags::dynallocated);
- (_num18_p = new numeric(18))->setflag(status_flags::dynallocated);
- (_num20_p = new numeric(20))->setflag(status_flags::dynallocated);
- (_num24_p = new numeric(24))->setflag(status_flags::dynallocated);
- (_num25_p = new numeric(25))->setflag(status_flags::dynallocated);
- (_num30_p = new numeric(30))->setflag(status_flags::dynallocated);
- (_num48_p = new numeric(48))->setflag(status_flags::dynallocated);
- (_num60_p = new numeric(60))->setflag(status_flags::dynallocated);
- (_num120_p = new numeric(120))->setflag(status_flags::dynallocated);
+ _num1_4_p = (const numeric *)&dynallocate<numeric>(1,4);
+ _num1_3_p = (const numeric *)&dynallocate<numeric>(1,3);
+ _num1_2_p = (const numeric *)&dynallocate<numeric>(1,2);
+ _num1_p = (const numeric *)&dynallocate<numeric>(1);
+ _num2_p = (const numeric *)&dynallocate<numeric>(2);
+ _num3_p = (const numeric *)&dynallocate<numeric>(3);
+ _num4_p = (const numeric *)&dynallocate<numeric>(4);
+ _num5_p = (const numeric *)&dynallocate<numeric>(5);
+ _num6_p = (const numeric *)&dynallocate<numeric>(6);
+ _num7_p = (const numeric *)&dynallocate<numeric>(7);
+ _num8_p = (const numeric *)&dynallocate<numeric>(8);
+ _num9_p = (const numeric *)&dynallocate<numeric>(9);
+ _num10_p = (const numeric *)&dynallocate<numeric>(10);
+ _num11_p = (const numeric *)&dynallocate<numeric>(11);
+ _num12_p = (const numeric *)&dynallocate<numeric>(12);
+ _num15_p = (const numeric *)&dynallocate<numeric>(15);
+ _num18_p = (const numeric *)&dynallocate<numeric>(18);
+ _num20_p = (const numeric *)&dynallocate<numeric>(20);
+ _num24_p = (const numeric *)&dynallocate<numeric>(24);
+ _num25_p = (const numeric *)&dynallocate<numeric>(25);
+ _num30_p = (const numeric *)&dynallocate<numeric>(30);
+ _num48_p = (const numeric *)&dynallocate<numeric>(48);
+ _num60_p = (const numeric *)&dynallocate<numeric>(60);
+ _num120_p = (const numeric *)&dynallocate<numeric>(120);
new((void*)&_ex_120) ex(*_num_120_p);
new((void*)&_ex_60) ex(*_num_60_p);
library_init::~library_init()
{
if (--count==0) {
- // In theory, we would have to clean up here. But since we were
- // only initializing memory in the ctor and that memory is reclaimed
- // anyways by the OS when the program exits, we skip this.
+ // It's really necessary to clean up, since the program
+ // lifetime might not be the same as libginac.{so,dll} one
+ // (e.g. consider // dlopen/dlsym/dlclose sequence).
+ // Let the ex dtors care for deleting the numerics!
+ _ex120.~ex();
+ _ex_120.~ex();
+ _ex60.~ex();
+ _ex_60.~ex();
+ _ex48.~ex();
+ _ex_48.~ex();
+ _ex30.~ex();
+ _ex_30.~ex();
+ _ex25.~ex();
+ _ex_25.~ex();
+ _ex24.~ex();
+ _ex_24.~ex();
+ _ex20.~ex();
+ _ex_20.~ex();
+ _ex18.~ex();
+ _ex_18.~ex();
+ _ex15.~ex();
+ _ex_15.~ex();
+ _ex12.~ex();
+ _ex_12.~ex();
+ _ex11.~ex();
+ _ex_11.~ex();
+ _ex10.~ex();
+ _ex_10.~ex();
+ _ex9.~ex();
+ _ex_9.~ex();
+ _ex8.~ex();
+ _ex_8.~ex();
+ _ex7.~ex();
+ _ex_7.~ex();
+ _ex6.~ex();
+ _ex_6.~ex();
+ _ex5.~ex();
+ _ex_5.~ex();
+ _ex4.~ex();
+ _ex_4.~ex();
+ _ex3.~ex();
+ _ex_3.~ex();
+ _ex2.~ex();
+ _ex_2.~ex();
+ _ex1.~ex();
+ _ex_1.~ex();
+ _ex1_2.~ex();
+ _ex_1_2.~ex();
+ _ex1_3.~ex();
+ _ex_1_3.~ex();
+ _ex1_4.~ex();
+ _ex_1_4.~ex();
+ _ex0.~ex();
}
}
+void library_init::init_unarchivers() { }
+
// comment skeleton for header files
git://www.ginac.de / ginac.git / blobdiff