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livetrax/libs/pbd/configuration_variable.cc
Robin Gareus 7b1f97bffa fix parsing "-inf" in config variables
The default for export-silence-threshold is -INFINITY, written
as "-inf" (by cfgtool) into system_config. Yet parsing the config using
a std::stringstream results in "0" (due to bugs in various libc++).
2016-12-07 00:50:00 +01:00

117 lines
2.9 KiB
C++

/*
Copyright (C) 1999-2009 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <iostream>
#include "pbd/compose.h"
#include "pbd/configuration_variable.h"
#include "pbd/debug.h"
using namespace std;
using namespace PBD;
void
ConfigVariableBase::add_to_node (XMLNode& node)
{
const std::string v = get_as_string ();
DEBUG_TRACE (DEBUG::Configuration, string_compose ("Config variable %1 stored as [%2]\n", _name, v));
XMLNode* child = new XMLNode ("Option");
child->add_property ("name", _name);
child->add_property ("value", v);
node.add_child_nocopy (*child);
}
bool
ConfigVariableBase::set_from_node (XMLNode const & node)
{
if (node.name() == "Config" || node.name() == "Canvas" || node.name() == "UI") {
/* ardour.rc */
const XMLProperty* prop;
XMLNodeList nlist;
XMLNodeConstIterator niter;
XMLNode const * child;
nlist = node.children();
for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
child = *niter;
if (child->name() == "Option") {
if ((prop = child->property ("name")) != 0) {
if (prop->value() == _name) {
if ((prop = child->property ("value")) != 0) {
set_from_string (prop->value());
return true;
}
}
}
}
}
} else if (node.name() == "Options") {
/* session file */
XMLNodeList olist;
XMLNodeConstIterator oiter;
XMLNode* option;
const XMLProperty* opt_prop;
olist = node.children();
for (oiter = olist.begin(); oiter != olist.end(); ++oiter) {
option = *oiter;
if (option->name() == _name) {
if ((opt_prop = option->property ("val")) != 0) {
set_from_string (opt_prop->value());
return true;
}
}
}
}
return false;
}
void
ConfigVariableBase::notify ()
{
// placeholder for any debugging desired when a config variable is modified
}
void
ConfigVariableBase::miss ()
{
// placeholder for any debugging desired when a config variable
// is set but to the same value as it already has
}
/* Specialisation of ConfigVariable to deal with float (-inf etc)
* http://stackoverflow.com/questions/23374095/should-a-stringstream-parse-infinity-as-an-infinite-value
*/
template<> void
ConfigVariable<float>::set_from_string (std::string const & s) {
value = std::strtof (s.c_str(), NULL);
}