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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
#include <string.h>
#include <stdio.h>
#include "machine.h"
#include "stack-c.h"
/**************************************************
* examples of an hand written interface
* Shows how to create Scilab variable from a C array
* (of int, float or double type). This is mainly used
* when the arrays are allocated in the C-code and we
* want to return the allocated arrays as Scilab objects
**************************************************/
/*------------------------------------------------------
* Creating a scilab variable from a pointer
* intex4c_1 : a pointer to a double array
* intex4c_2 : a pointer to an int array
* intex4c_3 : a pointer to a char array (i.e a string)
* intex4c_4 : 3,4,5 in one interface
* The interfaced functions are at the end of this file
*-------------------------------------------------------*/
extern int C2F(dblearray) __PARAMS((double **a, int *m, int *n,int *err));
extern int C2F(intarray) __PARAMS((int **a, int *m, int *n,int *err));
extern int C2F(crestr) __PARAMS((char **a, int *m,int *err));
/*------------------------------------------------------
* intex4c_1 : a pointer to a double array
*-------------------------------------------------------*/
int intex4c_1(fname)
char* fname;
{
static double l2[] ={ 1.0,2.0,3.0}, *ptr2= l2;
double *l1;
int m1,n1,ierr=0,m2=3,n2=1;
CheckRhs(0,0);
CheckLhs(1,2);
C2F(dblearray)( &l1,&m1,&n1,&ierr);
if ( ierr > 0 ) { Scierror(999,"%s: Internal error \r\n",fname); return 0; }
/* first example : l1 was allocated inside dblearray */
CreateVarFromPtr( 1, "d", &m1, &n1, &l1);
FreePtr(&l1); /* freeing space allocated inside dblearray */
/* second example : l2 is defined here */
CreateVarFromPtr( 2, "d", &m2, &n2, &ptr2);
LhsVar(1) = 1;
LhsVar(2) = 2;
return(0);
}
/*------------------------------------------------------
* intex4c_2 : a pointer to an int array
*-------------------------------------------------------*/
int intex4c_2(fname)
char* fname;
{
int *l1;
int m1,n1,ierr=0;
CheckRhs(0,0);
CheckLhs(1,1);
C2F(intarray)( &l1, &m1, &n1, &ierr);
if ( ierr > 0 ) { Scierror(999,"%s: Internal error \r\n",fname); return 0 ; }
CreateVarFromPtr( 1, "i", &m1, &n1, &l1);
FreePtr(&l1);
/* we can access and change data through VarPtr
* but it does not work for variables of type 's' (sparse) and 'S'
* (string matrices)
*/
*istk(VarPtr(1)) = 12;
LhsVar(1) = 1;
return(0);
}
/*------------------------------------------------------
* intex4c_3 : a pointer to a char array (i.e a string)
*-------------------------------------------------------*/
int intex4c_3(fname)
char* fname;
{
char *l1;
int m1,n1=1,ierr=0;
CheckRhs(0,0);
CheckLhs(1,1);
C2F(crestr)( &l1,&m1,&ierr);
if ( ierr > 0 ) { Scierror(999,"%s: Internal error \r\n",fname); return 0; }
CreateVarFromPtr( 1, "c", &m1, &n1, &l1);
FreePtr(&l1);
LhsVar(1) = 1;
return(0);
}
/*------------------------------------------------------
* intex6c :
*-------------------------------------------------------*/
int intex4c_4(fname)
char* fname;
{
char *l1;
int *l2;
double *l3;
int m1,n1=1,m2,n2,m3,n3,ierr=0;
CheckRhs(0,0);
CheckLhs(1,4);
C2F(crestr)( &l1, &m1, &ierr);
C2F(intarray)( &l2, &m2, &n2, &ierr);
C2F(dblearray)( &l3, &m3, &n3, &ierr);
if ( ierr > 0 ) { Scierror(999,"%s: Internal error \r\n",fname); return 0; }
/* Creating variable #1 of type character and dimension m1 x n1 (m1=1) */
CreateVarFromPtr( 1, "c", &m1, &n1, &l1);
CreateVarFromPtr( 2, "i", &m2, &n2, &l2);
CreateVarFromPtr( 3, "d", &m3, &n3, &l3);
/* Free memory */
FreePtr(&l1); FreePtr(&l2); FreePtr(&l3);
/* we change the first value of each variable */
*cstk(VarPtr(1)) = 'X';
*istk(VarPtr(2)) = 12;
*stk(VarPtr(3)) = 89.0;
/* Returning 3 variables (#1, #2, #3) to Scilab */
LhsVar(1) = 1;
LhsVar(2) = 2;
LhsVar(3) = 3;
return(0);
}
/*--------------------------------------------------------------
* Example of array created by C code
* converted to Scilab output variable
*---------------------------------------------------------------*/
/* double array */
int C2F(dblearray)( a, m, n,ierr)
int *m, *n,*ierr;
double **a;
{
int i ;
*n=5 ;
*m=3 ;
*a= ( double *) malloc( (unsigned) (*m)*(*n) *sizeof(double));
if ( *a != (double *) 0)
{
*ierr=0;
for ( i= 0 ; i < (*m)*(*n) ; i++) (*a)[i] = i+1;
}
else
*ierr=1;
return(0);
}
/* integer array */
int C2F(intarray)( a, m, n, ierr)
int *m, *n,*ierr;
int **a;
{
int i ;
*n=5 ;
*m=3 ;
*a= ( int *) malloc( (unsigned) (*m)*(*n) *sizeof(int));
if ( *a != (int *) 0)
{
*ierr=0;
for ( i= 0 ; i < (*m)*(*n) ; i++) (*a)[i] = i+1;
}
else
*ierr=1;
return(0);
}
/*************************************************************
* Example of character string created here.
* Its length is sent back as an output.
* It is converted into Scilab variable in the interface program.
* The allocated array is freed in the interface program.
*************************************************************/
#define MYSTR "Scilab is ..."
int C2F(crestr)( a, m, ierr)
int *m,*ierr;
char **a;
{
*m= strlen(MYSTR);
*a= (char *) malloc((unsigned) (*m+1)*sizeof(char));
if ( *a != (char *) 0)
{
*ierr=0;
sprintf((*a),MYSTR);
}
else
{
*ierr=1;
sciprint("malloc : No more space \r\n");
}
return(0);
}
|
