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reader.cpp
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Created
Sun, Oct 6, 15:49
Size
1 KB
Mime Type
text/x-c
Expires
Tue, Oct 8, 15:49 (2 d)
Engine
blob
Format
Raw Data
Handle
21427703
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rTSUNAMIPROJECT PHPC-TSUNAMI-PROJECT
reader.cpp
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//
// Created by Arnaud Pannatier on 06.05.18.
//
#include "reader.h"
#include <fstream>
#include <iostream>
Grid
Reader
::
readGridFromFile
(
std
::
string
filename
,
std
::
size_t
nx
,
std
::
size_t
ny
)
{
Grid
ret
=
Grid
(
nx
,
ny
);
std
::
cout
<<
filename
<<
std
::
endl
;
std
::
ifstream
file
(
filename
,
std
::
ios
::
in
|
std
::
ios
::
binary
);
if
(
file
.
is_open
())
{
char
*
memblock
;
file
.
ignore
(
std
::
numeric_limits
<
std
::
streamsize
>::
max
()
);
std
::
streamsize
size
=
file
.
gcount
();
file
.
clear
();
std
::
cout
<<
size
<<
" -- size "
<<
std
::
endl
;
memblock
=
new
char
[
size
];
file
.
seekg
(
0
,
std
::
ios
::
beg
);
file
.
read
(
memblock
,
size
);
file
.
close
();
//std::cout << "the entire file content is in memory" << std::endl;
double
*
double_values
=
reinterpret_cast
<
double
*>
(
memblock
);
for
(
std
::
size_t
x
(
0
);
x
<
nx
;
x
++
)
{
for
(
std
::
size_t
y
(
0
);
y
<
ny
;
y
++
)
{
ret
(
x
,
y
)
=
double_values
[
y
*
nx
+
x
];
}
}
delete
memblock
;
}
else
{
std
::
cout
<<
"File is not open ! "
<<
std
::
endl
;
}
return
ret
;
}
void
Reader
::
writeGridInFile
(
Grid
&
g
,
std
::
string
filename
,
std
::
size_t
nx
,
std
::
size_t
ny
)
{
std
::
cout
<<
filename
<<
std
::
endl
;
double
*
double_values
;
double_values
=
new
double
[
nx
*
ny
];
for
(
std
::
size_t
x
(
0
);
x
<
nx
;
x
++
)
{
for
(
std
::
size_t
y
(
0
);
y
<
ny
;
y
++
)
{
double_values
[
x
*
nx
+
y
]
=
g
(
y
,
x
);
}
}
char
*
memblock
=
reinterpret_cast
<
char
*>
(
double_values
);
std
::
ofstream
file
(
filename
,
std
::
ios
::
out
|
std
::
ios
::
binary
);
file
.
write
(
memblock
,
sizeof
(
memblock
)
*
nx
*
ny
);
std
::
cout
<<
"Grid Saved ! "
<<
std
::
endl
;
delete
double_values
;
}
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