/usr/include/getfem/dal_naming_system.h is in libgetfem++-dev 4.2.1~beta1~svn4482~dfsg-2build1.
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/*===========================================================================
Copyright (C) 2002-2012 Yves Renard
This file is a part of GETFEM++
Getfem++ 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 along with the GCC Runtime Library
Exception either version 3.1 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 Lesser General Public
License and GCC Runtime Library Exception for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
As a special exception, you may use this file as it is a part of a free
software library without restriction. Specifically, if other files
instantiate templates or use macros or inline functions from this file,
or you compile this file and link it with other files to produce an
executable, this file does not by itself cause the resulting executable
to be covered by the GNU Lesser General Public License. This exception
does not however invalidate any other reasons why the executable file
might be covered by the GNU Lesser General Public License.
===========================================================================*/
#ifndef DAL_NAMING_SYSTEM_H
#define DAL_NAMING_SYSTEM_H
#include <deque>
#include <map>
#include "dal_static_stored_objects.h"
#include "getfem_omp.h"
namespace dal {
/** @file dal_naming_system.h
@author Yves Renard <Yves.Renard@insa-lyon.fr>
@date August 17, 2002.
@brief Naming system.
*/
/** Associate a name to a method descriptor and store method descriptors.
*
* Methods may have parameters such as integer or other methods.
* The class METHOD have to derive from dal::static_stored_object
*/
template <class METHOD> class naming_system {
public :
typedef boost::intrusive_ptr<const METHOD> pmethod;
struct parameter {
int type_; // 0 = numeric value, 1 = pointer on another method.
double num_;
pmethod pm_;
pmethod method(void) const { return pm_; }
double num(void) const { return num_; }
int type(void) const { return type_; }
parameter(double e) : type_(0), num_(e), pm_(0) {}
parameter(pmethod p) : type_(1), num_(0.), pm_(p) {}
};
typedef std::deque<parameter> param_list;
typedef pmethod (* pfunction)(param_list &,
std::vector<pstatic_stored_object> &);
typedef pmethod (* pgenfunction)(std::string,
std::vector<pstatic_stored_object> &);
typedef size_t size_type;
protected :
std::string prefix;
std::map<std::string, size_type> suffixes;
std::vector<pfunction> functions;
std::vector<pgenfunction> genfunctions;
std::map<std::string, std::string> shorter_names;
std::map<std::string, std::string> aliases;
struct method_key : virtual public static_stored_object_key {
std::string name;
virtual bool compare(const static_stored_object_key &oo) const {
const method_key &o = dynamic_cast<const method_key &>(oo);
if (name < o.name) return true; else return false;
}
method_key(const std::string &name_) : name(name_) {}
};
int mns_lexem(std::string s, size_type i, size_type &lenght);
pmethod method_(std::string name, size_type &i, bool throw_if_not_found);
public :
void add_suffix(std::string name, pfunction pf);
void add_generic_function(pgenfunction pf);
std::string normative_name_of_method(pmethod pm) const;
std::string shorter_name_of_method(pmethod pm) const;
pmethod method(std::string name, size_type &i,
bool throw_if_not_found = true)
{ gmm::standard_locale sl; return method_(name, i, throw_if_not_found); }
naming_system(std::string pr) : prefix(pr) {}
bool delete_method(std::string name);
};
template <class METHOD>
void naming_system<METHOD>::add_suffix(std::string name,
typename naming_system<METHOD>::pfunction pf) {
std::string tname = prefix + '_' + name;
if (suffixes.find(tname) != suffixes.end()) {
functions[suffixes[tname]] = pf;
} else {
suffixes[tname] = functions.size();
functions.push_back(pf);
}
}
template <class METHOD>
void naming_system<METHOD>::add_generic_function(pgenfunction pf) {
genfunctions.push_back(pf);
}
template <class METHOD>
std::string naming_system<METHOD>::normative_name_of_method(typename
naming_system<METHOD>::pmethod pm) const {
pstatic_stored_object_key k = key_of_stored_object(pm);
const method_key *p;
if (!k || !(p = dynamic_cast<const method_key *>(k)))
return prefix + "_UNKNOWN";
return p->name;
}
template <class METHOD> std::string
naming_system<METHOD>::shorter_name_of_method(typename
naming_system<METHOD>::pmethod pm) const {
pstatic_stored_object_key k = key_of_stored_object(pm);
const method_key *p;
if (!k || !(p = dynamic_cast<const method_key *>(k)))
return prefix + "_UNKNOWN";
const std::string &name(p->name);
std::map<std::string, std::string>::const_iterator
it = shorter_names.find(name);
if (it != shorter_names.end()) return it->second;
return name;
}
/* 0 = end of the string
1 = espace
2 = method name
3 = number
4 = '('
5 = ')'
6 = ','
*/
template <class METHOD>
int naming_system<METHOD>::mns_lexem(std::string s, size_type i,
size_type &lenght) {
lenght = 1;
if (i >= s.size()) return 0;
char c = s[i];
if (isspace(c)) return 1;
if (isalpha(c) || c == '_') {
for (c = s[++i] ; isalpha(c) || c == '_' || isdigit(c); c = s[++i])
++lenght;
return 2;
}
if (isdigit(c) || c == '-' || c == '+') {
for (c = s[++i] ; isdigit(c) || c == 'e' || c == 'E' ||
c == '.' || c == '-' || c == '+' ; c = s[++i]) ++lenght;
return 3;
}
if (c == '(') return 4;
if (c == ')') return 5;
if (c == ',') return 6;
GMM_ASSERT1(false, "Invalid character on position " << i
<< " of the string : " << s);
}
template <class METHOD>
typename naming_system<METHOD>::pmethod
naming_system<METHOD>::method_(std::string name, size_type &i,
bool throw_if_not_found) {
int state = 0;
bool error = false;
bool isend = false;
pmethod pm = 0;
size_type ind_suff = size_type(-1);
size_type l;
param_list params;
std::string suff;
for(;;) {
int lex = mns_lexem(name, i, l);
switch (state) {
case 0 :
switch (lex) {
case 1 : i += l; break;
case 2 :
suff = name.substr(i, l);
if (suffixes.find(suff) != suffixes.end())
ind_suff = suffixes[suff];
state = 1; i += l; break;
default : error = true;
}
break;
case 1 :
switch (lex) {
case 4 : state = 2; i += l; break;
default : isend = true; break;
}
break;
case 2 :
switch (lex) {
case 1 : i += l; break;
case 2 :
pm = method_(name, i, throw_if_not_found);
if (!pm) return pm;
params.push_back(parameter(pm));
state = 3; break;
case 3 : {
char *p;
gmm::standard_locale sl;
params.push_back(parameter(strtod(&(name[i]), &p)));
i += l; if (p < &(name[i])) error = true;
state = 3; break;
}
case 5 : i += l; isend = true; break;
default : error = true;
}
break;
case 3 :
switch (lex) {
case 1 : i += l; break;
case 5 : i += l; isend = true; break;
case 6 : i += l; state = 2; break;
default : error = true;
}
break;
}
GMM_ASSERT1(!error, "Syntax error on position " << i
<< " of the string : " << name);
if (isend) {
std::stringstream norm_name; //norm_name.imbue(std::locale("C"));
gmm::standard_locale loc;
norm_name << suff;
if (params.size() > 0) {
norm_name << '(';
typename param_list::const_iterator it = params.begin(),
ite = params.end();
for (; it != ite; ++it) {
if ((*it).type() == 0) norm_name << (*it).num();
if ((*it).type() == 1)
norm_name << normative_name_of_method((*it).method());
if (it+1 != ite) norm_name << ',';
}
norm_name << ')';
}
method_key nname(norm_name.str());
if (aliases.find(norm_name.str()) != aliases.end())
nname.name = aliases[norm_name.str()];
pstatic_stored_object o = search_stored_object(nname);
if (o) return stored_cast<METHOD>(o);
pm = 0;
std::vector<pstatic_stored_object> dependencies;
for (size_type k = 0; k < genfunctions.size() && pm == 0; ++k) {
pm = (*(genfunctions[k]))(nname.name, dependencies);
}
if (!pm) {
if (ind_suff == size_type(-1)) {
GMM_ASSERT1(!throw_if_not_found, "Unknown method: " << nname.name);
return 0;
}
pm = (*(functions[ind_suff]))(params, dependencies);
}
pstatic_stored_object_key k = key_of_stored_object(pm);
if (!k) {
add_stored_object(new method_key(nname), pm,
dal::PERMANENT_STATIC_OBJECT);
for (size_type j = 0; j < dependencies.size(); ++j)
add_dependency(pm, dependencies[j]);
}
else {
std::string normname((dynamic_cast<const method_key *>(k))->name);
aliases[nname.name] = normname;
if (nname.name.size() < normname.size()) {
if (shorter_names.find(normname) != shorter_names.end()) {
if (nname.name.size() < shorter_names[normname].size())
shorter_names[normname] = nname.name;
}
else shorter_names[normname] = nname.name;
}
}
return pm;
}
}
}
/**deletion of static_stored_object in the naming system*/
template <class METHOD>
bool naming_system<METHOD>::delete_method(std::string name)
{
pmethod pm = 0;
method_key nname(name);
pstatic_stored_object o = search_stored_object(nname);
if (!o) return false;
pm = stored_cast<METHOD>(o);
pstatic_stored_object_key k = key_of_stored_object(pm);
dal::del_stored_object(pm, false);
return true;
}
}
#endif
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