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util.c
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Created
Tue, Apr 30, 13:28
Size
4 KB
Mime Type
text/x-c
Expires
Thu, May 2, 13:28 (2 d)
Engine
blob
Format
Raw Data
Handle
17358345
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rCGPHPC CG-PHPC
util.c
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#include "util.h"
// ====================================================================
// Implementation of useful functions
// ====================================================================
/*
print a matrix A of size m x n
*/
void
print_mat
(
char
title
[],
double
*
A
,
int
m
,
int
n
)
{
double
x
;
printf
(
"%s"
,
title
);
for
(
int
i
=
0
;
i
<
m
;
i
++
){
for
(
int
j
=
0
;
j
<
n
;
j
++
){
x
=
A
[
id
(
m
,
i
,
j
)];
//if ( abs( x ) < NEARZERO ) x = 0.0;
printf
(
"%f (%d)
\t
"
,
x
,
id
(
m
,
i
,
j
));
}
printf
(
"
\n
"
);
}
}
/*
print first d elements from a matrix A of size m x n
*/
void
print_first
(
char
title
[],
double
*
A
,
int
m
,
int
n
,
int
d
)
{
double
x
;
printf
(
"%s"
,
title
);
for
(
int
i
=
0
;
i
<
d
;
i
++
){
x
=
A
[
i
];
//if ( abs( x ) < NEARZERO ) x = 0.0;
printf
(
"%f (%d)
\t
"
,
x
,
i
);
}
printf
(
"
\n
"
);
}
/*
reads a matrix A of size m x n
inspired by https://math.nist.gov/MatrixMarket/mmio/c/example_read.c
*/
double
*
read_mat
(
const
char
*
restrict
fn
)
{
double
*
mat
;
int
n
,
m
;
int
ret_code
;
MM_typecode
matcode
;
FILE
*
f
;
int
nz
;
int
i
,
*
I
,
*
J
;
double
tmp
;
if
((
f
=
fopen
(
fn
,
"r"
))
==
NULL
)
{
printf
(
"Could not open matrix"
);
exit
(
1
);
}
if
(
mm_read_banner
(
f
,
&
matcode
)
!=
0
)
{
printf
(
"Could not process Matrix Market banner.
\n
"
);
exit
(
1
);
}
// Matrix is sparse
if
(
mm_is_matrix
(
matcode
)
&&
mm_is_coordinate
(
matcode
)
)
{
if
((
ret_code
=
mm_read_mtx_crd_size
(
f
,
&
m
,
&
n
,
&
nz
))
!=
0
)
{
exit
(
1
);
}
else
{
if
(
(
m
==
1
)
||
(
n
==
1
)
){
printf
(
"size of vector = %d x %d
\n
"
,
m
,
n
);
}
else
{
printf
(
"size of matrix = %d x %d
\n
"
,
m
,
n
);
}
}
}
// Matrix is not sparse
else
if
(
mm_is_matrix
(
matcode
)
&&
mm_is_array
(
matcode
)
)
{
// printf("case : %%MatrixMarket matrix array real symmetric \n");
if
((
ret_code
=
mm_read_mtx_array_size
(
f
,
&
m
,
&
n
))
!=
0
)
{
exit
(
1
);
}
else
{
if
(
(
m
==
1
)
||
(
n
==
1
)
){
printf
(
"size of vector = %d x %d
\n
"
,
m
,
n
);
}
else
{
printf
(
"size of matrix = %d x %d
\n
"
,
m
,
n
);
}
}
nz
=
m
*
n
;
}
// Matrix is something else
else
{
printf
(
"Sorry, this application does not support "
);
printf
(
"Market Market type: [%s]
\n
"
,
mm_typecode_to_str
(
matcode
));
exit
(
1
);
}
/* reserve memory for matrices */
I
=
(
int
*
)
malloc
(
nz
*
sizeof
(
int
));
J
=
(
int
*
)
malloc
(
nz
*
sizeof
(
int
));
mat
=
(
double
*
)
malloc
(
m
*
n
*
sizeof
(
double
));
for
(
i
=
0
;
i
<
m
*
n
;
i
++
)
{
mat
[
i
]
=
0.
;
}
/* NOTE: when reading in doubles, ANSI C requires the use of the "l" */
/* specifier as in "%lg", "%lf", "%le", otherwise errors will occur */
/* (ANSI C X3.159-1989, Sec. 4.9.6.2, p. 136 lines 13-15) */
// Matrix is symmetric
if
(
mm_is_symmetric
(
matcode
)){
for
(
i
=
0
;
i
<
nz
;
i
++
)
{
if
(
fscanf
(
f
,
"%d %d %lg
\n
"
,
&
I
[
i
],
&
J
[
i
],
&
tmp
)
==
3
){
I
[
i
]
--
;
/* adjust from 1-based to 0-based */
J
[
i
]
--
;
mat
[
I
[
i
]
*
m
+
J
[
i
]]
=
tmp
;
mat
[
J
[
i
]
*
m
+
I
[
i
]]
=
tmp
;
}
else
if
(
fscanf
(
f
,
"%lg
\n
"
,
&
tmp
)
==
1
){
mat
[
i
]
=
tmp
;
}
else
{
break
;
}
}
}
// Matrix is not symmetric
if
(
mm_is_general
(
matcode
)){
for
(
i
=
0
;
i
<
nz
;
i
++
)
{
if
(
fscanf
(
f
,
"%d %d %lg
\n
"
,
&
I
[
i
],
&
J
[
i
],
&
tmp
)
==
3
){
I
[
i
]
--
;
/* adjust from 1-based to 0-based */
J
[
i
]
--
;
mat
[
I
[
i
]
*
m
+
J
[
i
]]
=
tmp
;
}
else
if
(
fscanf
(
f
,
"%lg
\n
"
,
&
tmp
)
==
1
){
mat
[
i
]
=
tmp
;
}
else
{
break
;
}
}
}
if
(
f
!=
stdin
)
fclose
(
f
);
// print_mat( "matrice : \n", mat, m, n );
free
(
I
);
free
(
J
);
return
mat
;
}
/*
Reads the size of the matrix
*/
/*
reads a matrix A of size m x n
*/
struct
size_m
get_size
(
const
char
*
restrict
fn
)
{
int
n
,
m
,
nz
;
FILE
*
f
;
struct
size_m
size
;
int
ret_code
;
MM_typecode
matcode
;
if
((
f
=
fopen
(
fn
,
"r"
))
==
NULL
)
{
printf
(
"Could not open matrix"
);
exit
(
1
);
}
if
(
mm_read_banner
(
f
,
&
matcode
)
!=
0
)
{
printf
(
"Could not process Matrix Market banner.
\n
"
);
exit
(
1
);
}
if
(
mm_is_matrix
(
matcode
)
&&
mm_is_coordinate
(
matcode
)
)
{
if
((
ret_code
=
mm_read_mtx_crd_size
(
f
,
&
m
,
&
n
,
&
nz
))
!=
0
)
{
exit
(
1
);
}
}
else
if
(
mm_is_matrix
(
matcode
)
&&
mm_is_array
(
matcode
)
)
{
if
((
ret_code
=
mm_read_mtx_array_size
(
f
,
&
m
,
&
n
))
!=
0
)
{
exit
(
1
);
}
}
// if ((ret_code = mm_read_mtx_crd_size(f, &m, &n, &nz)) !=0)
// exit(1);
size
.
m
=
m
;
size
.
n
=
n
;
if
(
f
!=
stdin
)
fclose
(
f
);
return
size
;
}
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