/xbmc/visualizations/XBMCProjectM/libprojectM/ConfigFile.cpp
http://github.com/xbmc/xbmc · C++ · 142 lines · 94 code · 29 blank · 19 comment · 24 complexity · efd67b25a2b2542b64796fd3f87309b2 MD5 · raw file
- // ConfigFile.cpp
- #include "ConfigFile.h"
- 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;
- }