Mercurial > octave-nkf
view examples/make_int.cc @ 7334:274d9642ac10 release-3-0-0
[project @ 2007-12-22 01:42:45 by jwe]
author | jwe |
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date | Sat, 22 Dec 2007 01:42:46 +0000 |
parents | a1dbe9d80eee |
children | 4295d634797d |
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/* Copyright (C) 1996, 1997, 1999, 2000, 2003, 2005, 2007 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #include <octave/config.h> #include <cstdlib> #include <string> #include <ostream> #include <octave/lo-mappers.h> #include <octave/lo-utils.h> #include <octave/mx-base.h> #include <octave/str-vec.h> #include <octave/defun-dld.h> #include <octave/error.h> #include <octave/gripes.h> #include <octave/oct-obj.h> #include <octave/ops.h> #include <octave/ov-base.h> #include <octave/ov-typeinfo.h> #include <octave/ov.h> #include <octave/ov-scalar.h> #include <octave/pager.h> #include <octave/pr-output.h> #include <octave/symtab.h> #include <octave/variables.h> class Octave_map; class octave_value_list; class tree_walker; // Integer values. class octave_integer : public octave_base_value { public: octave_integer (void) : octave_base_value (), scalar (0) { } octave_integer (int i) : octave_base_value (), scalar (i) { } octave_integer (const octave_integer& s) : octave_base_value (), scalar (s.scalar) { } ~octave_integer (void) { } octave_base_value *clone (void) { return new octave_integer (*this); } #if 0 void *operator new (size_t size); void operator delete (void *p, size_t size); #endif idx_vector index_vector (void) const { return idx_vector ((double) scalar); } int rows (void) const { return 1; } int columns (void) const { return 1; } bool is_constant (void) const { return true; } bool is_defined (void) const { return true; } bool is_real_scalar (void) const { return true; } octave_value all (void) const { return (double) (scalar != 0); } octave_value any (void) const { return (double) (scalar != 0); } bool is_real_type (void) const { return true; } bool is_scalar_type (void) const { return true; } bool is_numeric_type (void) const { return true; } bool valid_as_scalar_index (void) const { return scalar == 1; } bool valid_as_zero_index (void) const { return scalar == 0; } bool is_true (void) const { return (scalar != 0); } double double_value (bool = false) const { return (double) scalar; } int integer_value (bool = false) const { return scalar; } Matrix matrix_value (bool = false) const { return Matrix (1, 1, scalar); } Complex complex_value (bool = false) const { return scalar; } ComplexMatrix complex_matrix_value (bool = false) const { return ComplexMatrix (1, 1, Complex (scalar)); } octave_value gnot (void) const { return octave_value ((double) ! scalar); } octave_value uminus (void) const { return new octave_integer (- scalar); } octave_value transpose (void) const { return new octave_integer (scalar); } octave_value hermitian (void) const { return new octave_integer (scalar); } void increment (void) { ++scalar; } void decrement (void) { --scalar; } void print (std::ostream& os, bool pr_as_read_syntax = false) const; private: int scalar; DECLARE_OCTAVE_ALLOCATOR DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA }; void octave_integer::print (std::ostream& os, bool pr_as_read_syntax) const { os << scalar; // octave_print_internal (os, scalar, pr_as_read_syntax); } #ifdef DEFUNOP_OP #undef DEFUNOP_OP #endif #define DEFUNOP_OP(name, t, op) \ UNOPDECL (name, a) \ { \ CAST_UNOP_ARG (const octave_ ## t&); \ return octave_value (new octave_integer (op v.t ## _value ())); \ } DEFUNOP_OP (gnot, integer, !) DEFUNOP_OP (uminus, integer, -) DEFUNOP_OP (transpose, integer, /* no-op */) DEFUNOP_OP (hermitian, integer, /* no-op */) DEFNCUNOP_METHOD (incr, integer, increment) DEFNCUNOP_METHOD (decr, integer, decrement) #ifdef DEFBINOP_OP #undef DEFBINOP_OP #endif #define DEFBINOP_OP(name, t1, t2, op) \ BINOPDECL (name, a1, a2) \ { \ CAST_BINOP_ARGS (const octave_ ## t1&, const octave_ ## t2&); \ return octave_value \ (new octave_integer (v1.t1 ## _value () op v2.t2 ## _value ())); \ } // integer by integer ops. DEFBINOP_OP (add, integer, integer, +) DEFBINOP_OP (sub, integer, integer, -) DEFBINOP_OP (mul, integer, integer, *) DEFBINOP (div, integer, integer) { CAST_BINOP_ARGS (const octave_integer&, const octave_integer&); int d = v2.integer_value (); if (d == 0) gripe_divide_by_zero (); return new octave_integer (v1.integer_value () / d); } DEFBINOP (i_s_div, integer, scalar) { CAST_BINOP_ARGS (const octave_integer&, const octave_scalar&); double d = v2.double_value (); if (d == 0.0) gripe_divide_by_zero (); return new octave_scalar (v1.double_value () / d); } DEFBINOP (ldiv, integer, integer) { CAST_BINOP_ARGS (const octave_integer&, const octave_integer&); int d = v1.integer_value (); if (d == 0) gripe_divide_by_zero (); return new octave_integer (v2.integer_value () / d); } DEFBINOP_OP (lt, integer, integer, <) DEFBINOP_OP (le, integer, integer, <=) DEFBINOP_OP (eq, integer, integer, ==) DEFBINOP_OP (ge, integer, integer, >=) DEFBINOP_OP (gt, integer, integer, >) DEFBINOP_OP (ne, integer, integer, !=) DEFBINOP_OP (el_mul, integer, integer, !=) DEFBINOP (el_div, integer, integer) { CAST_BINOP_ARGS (const octave_integer&, const octave_integer&); int d = v2.integer_value (); if (d == 0) gripe_divide_by_zero (); return new octave_integer (v1.integer_value () / d); } DEFBINOP (el_ldiv, integer, integer) { CAST_BINOP_ARGS (const octave_integer&, const octave_integer&); int d = v1.integer_value (); if (d == 0) gripe_divide_by_zero (); return new octave_integer (v2.integer_value () / d); } DEFBINOP_OP (el_and, integer, integer, &&) DEFBINOP_OP (el_or, integer, integer, ||) DEFUN_DLD (make_int, args, , "int_val = make_int (val)\n\ \n\ Creates an integer variable from VAL.") { static bool type_loaded = false; if (! type_loaded) { octave_integer::register_type (); mlock ("make_int"); octave_stdout << "installing integer type at type-id = " << octave_integer::static_type_id () << "\n"; INSTALL_UNOP (op_not, octave_integer, gnot); INSTALL_UNOP (op_uminus, octave_integer, uminus); INSTALL_UNOP (op_transpose, octave_integer, transpose); INSTALL_UNOP (op_hermitian, octave_integer, hermitian); INSTALL_NCUNOP (op_incr, octave_integer, incr); INSTALL_NCUNOP (op_decr, octave_integer, decr); INSTALL_BINOP (op_add, octave_integer, octave_integer, add); INSTALL_BINOP (op_sub, octave_integer, octave_integer, sub); INSTALL_BINOP (op_mul, octave_integer, octave_integer, mul); INSTALL_BINOP (op_div, octave_integer, octave_integer, div); INSTALL_BINOP (op_ldiv, octave_integer, octave_integer, ldiv); INSTALL_BINOP (op_lt, octave_integer, octave_integer, lt); INSTALL_BINOP (op_le, octave_integer, octave_integer, le); INSTALL_BINOP (op_eq, octave_integer, octave_integer, eq); INSTALL_BINOP (op_ge, octave_integer, octave_integer, ge); INSTALL_BINOP (op_gt, octave_integer, octave_integer, gt); INSTALL_BINOP (op_ne, octave_integer, octave_integer, ne); INSTALL_BINOP (op_el_mul, octave_integer, octave_integer, el_mul); INSTALL_BINOP (op_el_div, octave_integer, octave_integer, el_div); INSTALL_BINOP (op_el_ldiv, octave_integer, octave_integer, el_ldiv); INSTALL_BINOP (op_el_and, octave_integer, octave_integer, el_and); INSTALL_BINOP (op_el_or, octave_integer, octave_integer, el_or); INSTALL_BINOP (op_div, octave_integer, octave_scalar, i_s_div); } octave_value retval; if (args.length () == 1) { double d = args(0).double_value (); if (! error_state) retval = octave_value (new octave_integer (NINT (d))); } else usage ("make_int"); return retval; } DEFUN_DLD (doit, args, , "doit (I)") { octave_value_list retval; if (args(0).type_id () == octave_integer::static_type_id ()) { // At this point, we know we have a handle for an octave_integer // object, so we can peek at the representation and extract the // data. const octave_base_value& rep = args(0).get_rep (); int my_value = ((const octave_integer&) rep) . integer_value (); message ("doit", "your lucky number is: %d", my_value); } else gripe_wrong_type_arg ("doit", args(0)); return retval; } DEFINE_OCTAVE_ALLOCATOR (octave_integer); DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_integer, "integer", "integer"); /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */