1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
// Copyright (c) 2006-2009 Inria Lorraine (France). All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/CGAL-3.6-branch/Algebraic_kernel_d/include/CGAL/RS/polynomial_1_io.h $
// $Id: polynomial_1_io.h 54380 2010-03-01 16:07:43Z penarand $
//
// Author: Luis Pearanda <luis.penaranda@loria.fr>
#ifndef CGAL_RS_POLYNOMIAL_1_IO_H
#define CGAL_RS_POLYNOMIAL_1_IO_H
namespace CGAL{
inline
std::ostream& operator<<(std::ostream &os,const RS_polynomial_1 &p){
if(is_pretty(os)){
bool printed = false;
int degree=p.get_degree();
mpz_t *coef=p.get_coefs();
if(!degree)
return(os<<Gmpz(coef[0]));
for(int i=degree;i>=0;--i){
if(mpz_sgn(coef[i])){
if(printed&&(mpz_sgn(coef[i])==1))
os<<"+";
printed = true;
bool flag = false;
if((!mpz_cmp_si(coef[i],-1))&&i)
os<<"-";
else
if((mpz_cmp_ui(coef[i],1))||(!i)){
flag = true;
os<<Gmpz(coef[i]);
}
if(i){
if (flag)
os<<"*";
os<<"x";
if(i-1)
os<<"^"<<i;
}
}
}
if (!printed)
os<<'0';
return os;
}else{
int d=p.get_degree();
os<<"[ d="<<d<<" ";
os<<"[ ";
for(int i=0;i<d+1;++i)
os<<Gmpz(p.coef(i))<<" ";
os<<"] ]";
return os;
}
}
std::istream& operator>>(std::istream &is,RS_polynomial_1 &pol){
std::istream::int_type c;
std::ios::fmtflags old_flags=is.flags();
is.unsetf(std::ios::skipws);
gmpz_eat_white_space(is);
if(is_pretty(is)){
std::string s;
while(((c=is.get())>='0'&&c<='9')||
c=='+'||c=='-'||c=='*'||c==' '||c=='x'||c=='^')
s.push_back(c);
is.putback(c);
pol=RS_polynomial_1(s);
goto ret_is;
}else{
int deg;
Gmpz z;
c=is.get(); // eat a '['
if(c!='[')
goto ret_fail_is;
gmpz_eat_white_space(is);
c=is.get(); // c='d'
if(c!='d')
goto ret_fail_is;
gmpz_eat_white_space(is);
c=is.get(); // c='='
if(c!='=')
goto ret_fail_is;
gmpz_eat_white_space(is);
c=is.peek();
deg=0;
while(c>='0'&&c<='9'){
c=is.get();
deg=10*deg+(c-'0');
c=is.peek();
}
pol=RS_polynomial_1(0);
pol.set_degree(deg);
gmpz_eat_white_space(is);
c=is.get();
if(c!='[')
goto ret_fail_is;
gmpz_eat_white_space(is);
for(int k=0;k<deg+1;++k){
is>>z;
pol.set_coef(k,z);
gmpz_eat_white_space(is);
}
c=is.get(); // ']'
if(c!=']')
goto ret_fail_is;
gmpz_eat_white_space(is);
c=is.get(); // ']'
if(c!=']')
goto ret_fail_is;
goto ret_is;
}
ret_fail_is:
is.setstate(std::ios_base::failbit);
ret_is:
is.flags(old_flags);
return is;
}
} // namespace CGAL
#endif // CGAL_RS_POLYNOMIAL_1_IO_H
// vim: tabstop=8: softtabstop=8: smarttab: shiftwidth=8: expandtab
|
