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Mon, Sep 9, 15:11
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text/x-c++
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rTAMAAS tamaas
parser.hh
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/**
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2016 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas is free software: 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, either version 3 of the License, or (at your option) any
* later version.
*
* Tamaas 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef PARSER_HH
#define PARSER_HH
#include <map>
#include <iomanip>
/* -------------------------------------------------------------------------- */
__BEGIN_TAMAAS__
template
<
typename
T
>
class
default_val
{
public
:
default_val
(){
is_set
=
false
;
};
default_val
(
const
T
&
v
){
is_set
=
true
;
val
=
v
;
};
bool
is_set
;
T
val
;
};
template
<>
class
default_val
<
bool
>
{
public
:
default_val
(){
is_set
=
true
;
val
=
false
;
};
default_val
(
const
bool
&
v
){
is_set
=
true
;
val
=
v
;
};
bool
is_set
;
bool
val
;
};
/* -------------------------------------------------------------------------- */
template
<
typename
T
>
class
TypedParameter
;
/* -------------------------------------------------------------------------- */
class
Parameter
{
public
:
Parameter
(
const
std
::
string
&
name
){
this
->
name
=
name
;
}
virtual
~
Parameter
(){};
void
setHelp
(
const
std
::
string
&
help
){
this
->
help
=
help
;
}
std
::
string
getHelp
(){
return
this
->
help
;
}
virtual
std
::
string
getStringDefault
()
=
0
;
virtual
void
parse
(
std
::
stringstream
&
sstr
)
=
0
;
template
<
typename
T
>
operator
T
(){
try
{
return
dynamic_cast
<
TypedParameter
<
T
>
&>
(
*
this
);
}
catch
(...)
{
SURFACE_FATAL
(
"bad cast on parameter "
<<
this
->
name
);
}
};
virtual
operator
std
::
string
()
=
0
;
std
::
string
name
;
std
::
string
help
;
};
/* -------------------------------------------------------------------------- */
template
<
typename
T
>
class
TypedParameterInterface
:
public
Parameter
{
public
:
TypedParameterInterface
(
const
std
::
string
&
name
,
const
default_val
<
T
>
&
def
)
:
Parameter
(
name
){
is_set
=
false
;
this
->
def
=
def
;
};
virtual
void
parse
(
std
::
stringstream
&
sstr
){
sstr
>>
this
->
val
;
if
(
sstr
.
fail
())
SURFACE_FATAL
(
"could not parse "
<<
this
->
name
);
std
::
cerr
<<
this
->
name
<<
" = "
<<
this
->
val
<<
std
::
endl
;
this
->
is_set
=
true
;
};
operator
std
::
string
(){
std
::
stringstream
sstr
;
T
tmp
=
*
this
;
sstr
<<
tmp
;
return
sstr
.
str
();
};
operator
T
(){
if
(
is_set
)
return
val
;
if
(
def
.
is_set
)
return
def
.
val
;
else
SURFACE_FATAL
(
"option '"
<<
name
<<
"' has no default: must be set"
);
};
virtual
std
::
string
getStringDefault
(){
std
::
stringstream
sstr
;
if
(
def
.
is_set
)
sstr
<<
def
.
val
;
return
sstr
.
str
();
}
protected
:
T
val
;
default_val
<
T
>
def
;
bool
is_set
;
};
/* -------------------------------------------------------------------------- */
template
<>
class
TypedParameterInterface
<
std
::
string
>
:
public
Parameter
{
public
:
TypedParameterInterface
(
const
std
::
string
&
name
,
const
default_val
<
std
::
string
>
&
def
)
:
Parameter
(
name
){
is_set
=
false
;
this
->
def
=
def
;
};
virtual
void
parse
(
std
::
stringstream
&
sstr
){
sstr
>>
this
->
val
;
std
::
cerr
<<
this
->
name
<<
" = "
<<
this
->
val
<<
std
::
endl
;
this
->
is_set
=
true
;
};
operator
std
::
string
(){
if
(
is_set
)
return
val
;
if
(
def
.
is_set
)
return
def
.
val
;
else
SURFACE_FATAL
(
"option '"
<<
name
<<
"' has no default: must be set"
);
};
virtual
std
::
string
getStringDefault
(){
std
::
stringstream
sstr
;
if
(
def
.
is_set
)
sstr
<<
def
.
val
;
return
sstr
.
str
();
}
protected
:
std
::
string
val
;
default_val
<
std
::
string
>
def
;
bool
is_set
;
};
/* -------------------------------------------------------------------------- */
template
<
typename
T
>
class
TypedParameter
:
public
TypedParameterInterface
<
T
>
{
public
:
TypedParameter
(
const
std
::
string
&
name
,
const
default_val
<
T
>
&
def
)
:
TypedParameterInterface
<
T
>
(
name
,
def
){};
};
/* -------------------------------------------------------------------------- */
template
<>
class
TypedParameter
<
bool
>
:
public
TypedParameterInterface
<
bool
>
{
public
:
TypedParameter
(
const
std
::
string
&
name
,
const
default_val
<
bool
>
&
def
)
:
TypedParameterInterface
<
bool
>
(
name
,
def
){
};
virtual
void
parse
(
std
::
stringstream
&
sstr
){
if
(
sstr
.
eof
())
return
;
std
::
string
str_cpy
=
sstr
.
str
().
substr
(
sstr
.
tellg
());
std
::
stringstream
sstr_cpy
(
str_cpy
);
std
::
string
mot
;
sstr_cpy
>>
mot
;
if
(
mot
==
"False"
||
mot
==
"false"
)
val
=
false
;
else
if
(
mot
==
"True"
||
mot
==
"true"
)
val
=
true
;
else
{
if
(
!
def
.
is_set
)
SURFACE_FATAL
(
"default must be provided for unregistered option "
<<
name
);
val
=
def
.
val
;
if
(
val
==
true
)
val
=
false
;
else
val
=
true
;
}
std
::
cerr
<<
this
->
name
<<
" = "
<<
val
<<
std
::
endl
;
is_set
=
true
;
};
operator
std
::
string
(){
if
(
val
)
return
"true"
;
else
return
"false"
;
};
virtual
std
::
string
getStringDefault
(){
std
::
stringstream
sstr
;
if
(
def
.
is_set
)
{
if
(
def
.
val
)
sstr
<<
"true"
;
else
sstr
<<
"false"
;
}
return
sstr
.
str
();
}
};
/* -------------------------------------------------------------------------- */
class
Parser
{
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public
:
Parser
(){
this
->
addParameter
<
bool
>
(
"help"
,
"Get Usage information"
,
false
);
};
virtual
~
Parser
(){
for
(
auto
p:
this
->
parameters
)
delete
p
.
second
;
};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public
:
template
<
typename
T
>
void
addParameter
(
const
std
::
string
&
name
,
const
std
::
string
&
help
,
const
default_val
<
T
>
def
=
default_val
<
T
>
());
template
<
typename
T
>
void
addParameter
(
const
std
::
string
&
name
,
const
std
::
string
&
help
,
const
T
&
def
);
std
::
string
usage
();
void
parse
(
int
argc
,
char
**
argv
);
void
parse
(
const
std
::
string
&
line
);
std
::
string
makeFilename
(
const
std
::
string
&
prefix
=
""
,
const
std
::
string
&
extension
=
"txt"
);
Parameter
&
get
(
const
std
::
string
&
name
){
if
(
parameters
.
count
(
name
)
==
0
)
SURFACE_FATAL
(
"unregistered option "
<<
name
);
return
*
parameters
[
name
];
};
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public
:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private
:
std
::
map
<
std
::
string
,
Parameter
*>
parameters
;
std
::
string
prog_name
;
};
/* -------------------------------------------------------------------------- */
template
<
typename
T
>
void
Parser
::
addParameter
(
const
std
::
string
&
name
,
const
std
::
string
&
help
,
const
default_val
<
T
>
def
){
TypedParameter
<
T
>
*
p
=
new
TypedParameter
<
T
>
(
name
,
def
);
p
->
setHelp
(
help
);
this
->
parameters
[
name
]
=
p
;
}
/* -------------------------------------------------------------------------- */
template
<
typename
T
>
void
Parser
::
addParameter
(
const
std
::
string
&
name
,
const
std
::
string
&
help
,
const
T
&
def
){
TypedParameter
<
T
>
*
p
=
new
TypedParameter
<
T
>
(
name
,
default_val
<
T
>
(
def
));
p
->
setHelp
(
help
);
this
->
parameters
[
name
]
=
p
;
}
/* -------------------------------------------------------------------------- */
void
Parser
::
parse
(
int
argc
,
char
**
argv
){
std
::
string
line
;
this
->
prog_name
=
argv
[
0
];
for
(
int
i
=
1
;
i
<
argc
;
++
i
)
{
line
+=
argv
[
i
];
if
(
i
+
1
!=
argc
)
line
+=
" "
;
}
this
->
parse
(
line
);
}
/* -------------------------------------------------------------------------- */
void
Parser
::
parse
(
const
std
::
string
&
line
){
std
::
stringstream
sstr
(
line
);
while
(
sstr
.
good
()){
std
::
string
word
;
sstr
>>
word
;
if
(
word
.
find
(
"--"
)
==
0
){
std
::
string
option
=
word
.
substr
(
2
);
if
(
parameters
.
count
(
option
)
==
0
){
SURFACE_FATAL
(
"'"
<<
option
<<
"' is not a valid option"
<<
std
::
endl
<<
this
->
usage
());
}
if
(
option
==
"help"
)
SURFACE_FATAL
(
"
\n\n\n
"
+
this
->
usage
());
parameters
[
option
]
->
parse
(
sstr
);
}
}
}
/* -------------------------------------------------------------------------- */
std
::
string
Parser
::
makeFilename
(
const
std
::
string
&
prefix
,
const
std
::
string
&
extension
){
std
::
stringstream
sstr
;
if
(
prefix
!=
""
)
sstr
<<
prefix
;
else
sstr
<<
"general"
;
std
::
map
<
std
::
string
,
Parameter
*>::
iterator
it
=
parameters
.
begin
();
std
::
map
<
std
::
string
,
Parameter
*>::
iterator
end
=
parameters
.
end
();
while
(
it
!=
end
){
std
::
string
name
=
it
->
first
;
std
::
string
val
=
*
(
it
->
second
);
if
(
name
!=
"help"
)
sstr
<<
"-"
<<
name
<<
"-"
<<
val
;
++
it
;
}
sstr
<<
"."
<<
extension
;
return
sstr
.
str
();
}
/* -------------------------------------------------------------------------- */
std
::
string
Parser
::
usage
(){
std
::
map
<
std
::
string
,
Parameter
*>::
iterator
it
=
parameters
.
begin
();
std
::
map
<
std
::
string
,
Parameter
*>::
iterator
end
=
parameters
.
end
();
std
::
stringstream
sstr
;
sstr
<<
"Usage: "
<<
this
->
prog_name
<<
" --option1 val1 ... --optionN valN ..."
<<
std
::
endl
<<
std
::
endl
<<
"Options:"
<<
std
::
endl
;
while
(
it
!=
end
){
std
::
string
name
=
it
->
first
;
std
::
string
help
=
it
->
second
->
getHelp
();
sstr
<<
"
\t
"
<<
"--"
<<
std
::
left
<<
std
::
setw
(
30
)
<<
name
;
std
::
string
def
=
it
->
second
->
getStringDefault
();
if
(
def
!=
""
)
{
std
::
string
def_str
=
"(default '"
+
def
+
"')"
;
sstr
<<
std
::
setw
(
20
)
<<
def_str
;
}
else
sstr
<<
std
::
setw
(
20
)
<<
""
;
sstr
<<
" "
<<
help
<<
std
::
endl
;
++
it
;
}
return
sstr
.
str
();
}
__END_TAMAAS__
#endif
// PARSER_HH
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