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/*
* Copyright (c) 2010 Massachusetts Institute of Technology
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Chia-Hsin Owen Chen
*/
#include "mem/ruby/network/orion/ConfigFile.hh"
using std::string;
ConfigFile::ConfigFile( string filename, string delimiter,
string comment, string sentry )
: myDelimiter(delimiter), myComment(comment), mySentry(sentry)
{
// Construct a ConfigFile, getting keys and values from given file
std::ifstream in( filename.c_str() );
if( !in ) throw file_not_found( filename );
in >> (*this);
}
ConfigFile::ConfigFile()
: myDelimiter( string(1,'=') ), myComment( string(1,'#') )
{
// Construct a ConfigFile without a file; empty
}
void ConfigFile::remove( const string& key )
{
// Remove key and its value
myContents.erase( myContents.find( key ) );
return;
}
bool ConfigFile::keyExists( const string& key ) const
{
// Indicate whether key is found
mapci p = myContents.find( key );
return ( p != myContents.end() );
}
/* static */
void ConfigFile::trim( string& s )
{
// Remove leading and trailing whitespace
static const char whitespace[] = " \n\t\v\r\f";
s.erase( 0, s.find_first_not_of(whitespace) );
s.erase( s.find_last_not_of(whitespace) + 1U );
}
std::ostream& operator<<( std::ostream& os, const ConfigFile& cf )
{
// Save a ConfigFile to os
for( ConfigFile::mapci p = cf.myContents.begin();
p != cf.myContents.end();
++p )
{
os << p->first << " " << cf.myDelimiter << " ";
os << p->second << std::endl;
}
return os;
}
std::istream& operator>>( std::istream& is, ConfigFile& cf )
{
// Load a ConfigFile from is
// Read in keys and values, keeping internal whitespace
typedef string::size_type pos;
const string& delim = cf.myDelimiter; // separator
const string& comm = cf.myComment; // comment
const string& sentry = cf.mySentry; // end of file sentry
const pos skip = delim.length(); // length of separator
string nextline = ""; // might need to read ahead to see where value ends
while( is || nextline.length() > 0 )
{
// Read an entire line at a time
string line;
if( nextline.length() > 0 )
{
line = nextline; // we read ahead; use it now
nextline = "";
}
else
{
std::getline( is, line );
}
// Ignore comments
line = line.substr( 0, line.find(comm) );
// Check for end of file sentry
if( sentry != "" && line.find(sentry) != string::npos ) return is;
// Parse the line if it contains a delimiter
pos delimPos = line.find( delim );
if( delimPos < string::npos )
{
// Extract the key
string key = line.substr( 0, delimPos );
line.replace( 0, delimPos+skip, "" );
// See if value continues on the next line
// Stop at blank line, next line with a key, end of stream,
// or end of file sentry
bool terminate = false;
while( !terminate && is )
{
std::getline( is, nextline );
terminate = true;
string nlcopy = nextline;
ConfigFile::trim(nlcopy);
if( nlcopy == "" ) continue;
nextline = nextline.substr( 0, nextline.find(comm) );
if( nextline.find(delim) != string::npos )
continue;
if( sentry != "" && nextline.find(sentry) != string::npos )
continue;
nlcopy = nextline;
ConfigFile::trim(nlcopy);
if( nlcopy != "" ) line += "\n";
line += nextline;
terminate = false;
}
// Store key and value
ConfigFile::trim(key);
ConfigFile::trim(line);
cf.myContents[key] = line; // overwrites if key is repeated
}
}
return is;
}
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