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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#if HAVE_CONFIG_H
#include "config.h"
#endif
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#include "parametertreeparser.hh"
#include <cstdlib>
#include <iostream>
#include <ostream>
#include <string>
#include <sstream>
#include <fstream>
#include <set>
#include <map>
#include <algorithm>
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#include <dune/common/exceptions.hh>
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std::string Dune::ParameterTreeParser::ltrim(const std::string& s)
{
std::size_t firstNonWS = s.find_first_not_of(" \t\n\r");
if (firstNonWS!=std::string::npos)
return s.substr(firstNonWS);
return std::string();
}
std::string Dune::ParameterTreeParser::rtrim(const std::string& s)
{
std::size_t lastNonWS = s.find_last_not_of(" \t\n\r");
if (lastNonWS!=std::string::npos)
return s.substr(0, lastNonWS+1);
return std::string();
}
void Dune::ParameterTreeParser::readINITree(std::string file,
ParameterTree& pt,
bool overwrite)
{
std::ifstream in(file.c_str());
if (!in)
DUNE_THROW(Dune::IOError, "Could not open configuration file " << file);
readINITree(in, pt, "file '" + file + "'", overwrite);
}
void Dune::ParameterTreeParser::readINITree(std::istream& in,
ParameterTree& pt,
bool overwrite)
{
readINITree(in, pt, "stream", overwrite);
}
void Dune::ParameterTreeParser::readINITree(std::istream& in,
ParameterTree& pt,
const std::string srcname,
bool overwrite)
{
std::string prefix;
std::set<std::string> keysInFile;
while(!in.eof())
{
std::string line;
getline(in, line);
line = ltrim(line);
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if (line.size() == 0)
continue;
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switch (line[0]) {
case '#' :
break;
case '[' :
line = rtrim(line);
if (line[line.length()-1] == ']')
{
prefix = rtrim(ltrim(line.substr(1, line.length()-2)));
if (prefix != "")
prefix += ".";
}
break;
default :
std::string::size_type comment = line.find("#");
line = line.substr(0,comment);
std::string::size_type mid = line.find("=");
if (mid != std::string::npos)
{
std::string key = prefix+rtrim(ltrim(line.substr(0, mid)));
std::string value = ltrim(line.substr(mid+1));
if (value.length()>0)
{
// handle quoted strings
if ((value[0]=='\'') || (value[0]=='"'))
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{
char quote = value[0];
value=value.substr(1);
while (*(rtrim(value).rbegin())!=quote)
{
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{
std::string l;
getline(in, l);
value = value+"\n"+l;
}
else
value = value+quote;
}
value = rtrim(value);
value = value.substr(0,value.length()-1);
}
else
value = rtrim(value);
}
if (keysInFile.count(key) != 0)
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DUNE_THROW(ParameterTreeParserError, "Key '" << key <<
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"' appears twice in " << srcname << " !");
else
{
if(overwrite || ! pt.hasKey(key))
pt[key] = value;
keysInFile.insert(key);
}
}
break;
}
}
}
void Dune::ParameterTreeParser::readOptions(int argc, char* argv [],
ParameterTree& pt)
{
for(int i=1; i<argc; i++)
{
if ((argv[i][0]=='-') && (argv[i][1]!='\000'))
{
if(argv[i+1] == NULL)
DUNE_THROW(RangeError, "last option on command line (" << argv[i]
<< ") does not have an argument");
pt[argv[i]+1] = argv[i+1];
++i; // skip over option argument
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}
}
}
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void Dune::ParameterTreeParser::readNamedOptions(int argc, char* argv[],
ParameterTree& pt,
std::vector<std::string> keywords,
unsigned int required,
bool allow_more,
bool overwrite,
std::vector<std::string> help)
{
std::string helpstr = generateHelpString(argv[0], keywords, required, help);
std::vector<bool> done(keywords.size(),false);
std::size_t current = 0;
for (std::size_t i=1; i<std::size_t(argc); i++)
{
std::string opt = argv[i];
// check for help
if (opt == "-h" || opt == "--help")
DUNE_THROW(HelpRequest, helpstr);
// is this a named parameter?
if (opt.substr(0,2) == "--")
{
size_t pos = opt.find('=',2);
if (pos == std::string::npos)
DUNE_THROW(ParameterTreeParserError,
"value missing for parameter " << opt << "\n" << helpstr);
std::string key = opt.substr(2,pos-2);
std::string value = opt.substr(pos+1,opt.size()-pos-1);
auto it = std::find(keywords.begin(), keywords.end(), key);
// is this param in the keywords?
if (!allow_more && it == keywords.end())
DUNE_THROW(ParameterTreeParserError,
"unknown parameter " << key << "\n" << helpstr);
// do we overwrite an existing entry?
if (!overwrite && pt[key] != "")
DUNE_THROW(ParameterTreeParserError,
"parameter " << key << " already specified" << "\n" << helpstr);
pt[key] = value;
if(it != keywords.end())
done[std::distance(keywords.begin(),it)] = true; // mark key as stored
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}
else {
// map to the next keyword in the list
while(current < done.size() && done[current]) ++current;
// are there keywords left?
if (current >= done.size())
DUNE_THROW(ParameterTreeParserError,
"superfluous unnamed parameter" << "\n" << helpstr);
// do we overwrite an existing entry?
if (!overwrite && pt[keywords[current]] != "")
DUNE_THROW(ParameterTreeParserError,
"parameter " << keywords[current] << " already specified" << "\n" << helpstr);
pt[keywords[current]] = opt;
done[current] = true; // mark key as stored
}
}
// check that we receive all required keywords
std::string missing = "";
for (unsigned int i=0; i<keywords.size(); i++)
if ((i < required) && ! done[i]) // is this param required?
missing += std::string(" ") + keywords[i];
if (missing.size())
DUNE_THROW(ParameterTreeParserError,
"missing parameter(s) ... " << missing << "\n" << helpstr);
}
std::string Dune::ParameterTreeParser::generateHelpString(
std::string progname, std::vector<std::string> keywords, unsigned int required, std::vector<std::string> help)
{
static const char braces[] = "<>[]";
std::string helpstr = "";
helpstr = helpstr + "Usage: " + progname;
for (std::size_t i=0; i<keywords.size(); i++)
{
bool req = (i < required);
helpstr = helpstr +
" " + braces[req*2] +
keywords[i] +braces[req*2+1];
}
helpstr = helpstr + "\n"
"Options:\n"
"-h / --help: this help\n";
for (std::size_t i=0; i<std::min(keywords.size(),help.size()); i++)
{
if (help[i] != "")
helpstr = helpstr + "-" +
keywords[i] + ":\t" + help[i] + "\n";
}
return helpstr;
}