File: cddmp.c

package info (click to toggle)
cddlib 094l-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 2,264 kB
  • sloc: ansic: 9,303; makefile: 95; sh: 1
file content (185 lines) | stat: -rw-r--r-- 4,197 bytes parent folder | download | duplicates (2)
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
/* cddmp.c       (cddlib arithmetic operations using gmp)
   written by Komei Fukuda, fukuda@math.ethz.ch
   Version 0.94i, March 9, 2018
*/
/* 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
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "setoper.h"  /* set operation library header (Ver. March 16,1995 or later) */
#include "cdd.h"

void dd_set_global_constants()
{
 dd_init(dd_zero);
 dd_init(dd_minuszero);
 dd_init(dd_one);
 dd_init(dd_minusone);
 dd_init(dd_purezero);
  
 time(&dd_statStartTime); /* cddlib starting time */
 dd_statBApivots=0;  /* basis finding pivots */
 dd_statCCpivots=0;  /* criss-cross pivots */
 dd_statDS1pivots=0; /* phase 1 pivots */
 dd_statDS2pivots=0; /* phase 2 pivots */
 dd_statACpivots=0;  /* anticycling (cc) pivots */

 dd_choiceLPSolverDefault=dd_DualSimplex;  /* Default LP solver Algorithm */
 dd_choiceRedcheckAlgorithm=dd_DualSimplex;  /* Redundancy Checking Algorithm */
 dd_choiceLexicoPivotQ=dd_TRUE;    /* whether to use the lexicographic pivot */
 
#if defined GMPRATIONAL
 dd_statBSpivots=0;  /* basis status checking pivots */
 mpq_set_ui(dd_zero,0U,1U);
 mpq_set_ui(dd_purezero,0U,1U);
 mpq_set_ui(dd_one,1U,1U);
 mpq_set_si(dd_minusone,-1L,1U);
 ddf_set_global_constants();
#elif defined GMPFLOAT
 mpf_set_d(dd_zero,dd_almostzero);
 mpf_set_ui(dd_purezero,0U);
 mpf_set_ui(dd_one,1U);
 mpf_set_si(dd_minusone,-1L,1U);
#else
 dd_zero[0]= dd_almostzero;  /*real zero */
 dd_purezero[0]= 0.0;
 dd_one[0]= 1L;
 dd_minusone[0]= -1L;
#endif
 dd_neg(dd_minuszero,dd_zero);
}

void dd_free_global_constants()
{
 dd_clear(dd_zero);
 dd_clear(dd_minuszero);
 dd_clear(dd_one);
 dd_clear(dd_minusone);
 dd_clear(dd_purezero);
  
 time(&dd_statStartTime); /* cddlib starting time */
 dd_statBApivots=0;  /* basis finding pivots */
 dd_statCCpivots=0;  /* criss-cross pivots */
 dd_statDS1pivots=0; /* phase 1 pivots */
 dd_statDS2pivots=0; /* phase 2 pivots */
 dd_statACpivots=0;  /* anticycling (cc) pivots */

 dd_choiceLPSolverDefault=dd_DualSimplex;  /* Default LP solver Algorithm */
 dd_choiceRedcheckAlgorithm=dd_DualSimplex;  /* Redundancy Checking Algorithm */
 dd_choiceLexicoPivotQ=dd_TRUE;    /* whether to use the lexicographic pivot */
 
#if defined GMPRATIONAL
 dd_statBSpivots=0;  /* basis status checking pivots */
 ddf_free_global_constants();
#endif
}


#if defined GMPRATIONAL
void ddd_mpq_set_si(mytype a,signed long b)
{
  mpz_t nz, dz;

  mpz_init(nz); mpz_init(dz);

  mpz_set_si(nz, b);
  mpz_set_ui(dz, 1U);
  mpq_set_num(a, nz);
  mpq_set_den(a, dz);
  mpz_clear(nz);  mpz_clear(dz);
}
#endif

#if defined dd_CDOUBLE
void ddd_init(mytype a)   
{
  a[0]=0L;
}
  
void ddd_clear(mytype a)
{
  /* a[0]=0L;  */
}

void ddd_set(mytype a,mytype b)
{
  a[0]=b[0];
}

void ddd_set_d(mytype a,double b)
{
  a[0]=b;
}

void ddd_set_si(mytype a,signed long b)
{
  a[0]=(double)b;
}

void ddd_set_si2(mytype a,signed long b, unsigned long c)
{
  a[0]=(double)b/(double)c;
}

void ddd_add(mytype a,mytype b,mytype c)
{
  a[0]=b[0]+c[0];
}

void ddd_sub(mytype a,mytype b,mytype c)
{
  a[0]=b[0]-c[0];
}

void ddd_mul(mytype a,mytype b,mytype c)
{
  a[0]=b[0]*c[0];
}

void ddd_div(mytype a,mytype b,mytype c)
{
  a[0]=b[0]/c[0];
}

void ddd_neg(mytype a,mytype b)
{
  a[0]=-b[0];
}

void ddd_inv(mytype a,mytype b)
{
  a[0]=1/b[0];
}

int ddd_cmp(mytype a,mytype b)
{
  if (a[0]-b[0]>0) return 1;
  else if (a[0]-b[0]>=0) return 0;
  else return -1;
}

int ddd_sgn(mytype a)
{
  if (a[0]>0) return 1;
  else if (a[0]>=0) return 0;
  else return -1;
}

double ddd_get_d(mytype a)
{
  return a[0];
}
#endif

/* end of  cddmp.h  */