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#include "IniFile.h"
//
// TrimChars
//
// trim whitespace, or any, chars from both ends
//
template <typename S>
std::string TrimChars( const std::string& str, const S space )
{
const size_t start = str.find_first_not_of( space );
if ( str.npos == start )
return "";
return str.substr( start, str.find_last_not_of( space ) - start + 1 );
}
//
// IniSection :: Set
//
// set key's value if it doesn't match the default
// otherwise remove the key from the section if it exists
//
void IniSection::Set( const std::string& key, const std::string& val, const std::string& def )
{
if ( val != def )
operator[](key) = val;
else
{
iterator f = find(key);
if ( f != end() )
erase( f );
}
}
//
// IniSection :: Get
//
// return a key's value if it exists
// otherwise return the default
//
std::string IniSection::Get( const std::string& key, const std::string& def )
{
const const_iterator f = find(key);
if ( f != end() )
if ( false == f->second.empty() )
return f->second;
return def;
}
//
// IniFile :: Save
//
// save a file
//
void IniFile::Save( std::ostream& file )
{
const_iterator i = begin(),
e = end();
for ( ; i != e; ++i )
{
// skip a line at new sections
file << "\n[" << i->first << "]\n";
Section::const_iterator si = i->second.begin(),
se = i->second.end();
for ( ; si != se; ++si )
{
file << si->first << " = ";
// if value has quotes or whitespace, surround it with quotes
if (si->second.find_first_of("\"\t ") != std::string::npos)
file << '"' << si->second << '"';
else
file << si->second;
file << '\n';
}
}
}
//
// IniFile :: Load
//
// load a file
//
void IniFile::Load( std::istream& file )
{
const char* const space = "\t\r ";
std::string line;
// start off with an empty section
Section* section = &(*this)[""];
while ( std::getline( file, line ).good() ) // read a line
{
line = TrimChars(line,space);
if ( line.size() )
{
switch ( line[0] )
{
// comment
case '#' :
case ';' :
break;
// section
case '[' :
// kinda odd trimming
section = &(*this)[ TrimChars(line,"][\t\r ") ];
break;
// key/value
default :
{
std::istringstream ss(line);
std::string key; std::getline( ss, key, '=' );
std::string val; std::getline( ss, val );
val = TrimChars(val,space);
// handle quote surrounded values
if (val.length() > 1)
if ('"' == val[0])
val = val.substr(1, val.length()-2);
(*section)[ TrimChars(key,space) ] = val;
break;
}
}
}
}
Clean();
}
//
// IniFile :: Clean
//
// remove empty key/values and sections
// after trying to access ini sections/values, they are automatically allocated
// this deletes the empty stuff
//
void IniFile::Clean()
{
iterator i = begin(),
e = end();
for ( ; i != e; )
{
Section::iterator si = i->second.begin(),
se = i->second.end();
for ( ; si != se; )
{
if ( si->second.empty() )
i->second.erase( si++ );
else
++si;
}
if ( i->second.empty() )
erase( i++ );
else
++i;
}
}
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