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226 lines
6.1 KiB
226 lines
6.1 KiB
///////////////////////////////////////////////////////////////////////////////
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//
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// The contents of this file are subject to the Mozilla Public License
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// Version 1.1 (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License at
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// http://www.mozilla.org/MPL/
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//
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// Software distributed under the License is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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// License for the specific language governing rights and limitations
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// under the License.
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//
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// The Original Code is MP4v2.
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//
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// The Initial Developer of the Original Code is Kona Blend.
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// Portions created by Kona Blend are Copyright (C) 2008.
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// All Rights Reserved.
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//
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// Contributors:
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// Kona Blend, kona8lend@@gmail.com
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "libutil/impl.h"
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namespace mp4v2 { namespace util {
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///////////////////////////////////////////////////////////////////////////////
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Database::Database( const string& filename, const string& key )
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: _filename ( filename )
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, _key ( key )
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{
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}
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///////////////////////////////////////////////////////////////////////////////
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Database::~Database()
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{
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}
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///////////////////////////////////////////////////////////////////////////////
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void
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Database::close()
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{
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_stream.close();
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_stream.clear();
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}
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///////////////////////////////////////////////////////////////////////////////
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bool
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Database::open( bool write, string& fname )
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{
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_currentKeyValue.clear();
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_stream.clear();
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_stream.open( fname.c_str(), write ? ios::out : ios::in );
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return _stream.rdstate();
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}
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///////////////////////////////////////////////////////////////////////////////
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void
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Database::parseData( map<string,string>& data )
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{
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data.clear();
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string name;
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string value;
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if ( _currentKeyValue.length() ) {
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data[ _key ] = _currentKeyValue;
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_currentKeyValue.clear();
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}
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while ( !parsePair( name, value ) ) {
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if ( name == _key ) {
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_currentKeyValue = value;
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break;
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}
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data[ name ] = value;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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bool
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Database::parsePair( string& name, string& value )
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{
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enum Mode { LTRIM, COMMENT, NAME, DELIM, VALUE };
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Mode mode = LTRIM;
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bool delimVisible = false;
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int visibleLength = 0;
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for ( char c; !_stream.get( c ).rdstate(); ) {
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switch( mode ) {
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case LTRIM:
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switch( c ) {
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case '\0': // NULL
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case '\t': // TAB
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case ' ': // SPACE
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case '\n': // NEWLINE
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case '\r': // CARRIAGE-RETURN
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break;
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case '#': // COMMENT
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mode = COMMENT;
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break;
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default:
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mode = NAME;
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name = tolower( c );
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break;
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}
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break;
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case COMMENT:
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switch( c ) {
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case '\n': // NEWLINE
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case '\r': // CARRIAGE-RETURN
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mode = LTRIM;
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name.clear();
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break;
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default:
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break;
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}
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break;
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case NAME:
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switch( c ) {
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case '\0': // NULL
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break;
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case '\n': // NEWLINE
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case '\r': // CARRIAGE-RETURN
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mode = LTRIM;
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break;
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case '\t': // TAB
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case ' ': // SPACE
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case '=': // DELIMITER
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mode = DELIM;
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delimVisible = false;
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break;
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default:
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name += tolower( c );
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break;
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}
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break;
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case DELIM:
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switch( c ) {
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case '\n': // NEWLINE
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case '\r': // CARRIAGE-RETURN
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mode = LTRIM;
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name.clear();
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break;
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case '\0': // NULL
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case '\t': // TAB
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case ' ': // SPACE
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break;
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case '=': // DELIMITER
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if( delimVisible ) {
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mode = VALUE;
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value = c;
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visibleLength = (uint32_t)value.length();
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}
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delimVisible = true;
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break;
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default:
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mode = VALUE;
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value = c;
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visibleLength = (uint32_t)value.length();
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break;
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}
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break;
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case VALUE:
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switch (c) {
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case '\0': // NULL
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break;
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case '\n': // NEWLINE
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case '\r': // CARRIAGE-RETURN
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if( visibleLength )
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value.resize( visibleLength );
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return false;
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case '\t': // TAB
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case ' ': // SPACE
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value += ' ';
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break;
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default:
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value += c;
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visibleLength = (uint32_t)value.length();
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break;
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}
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break;
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default:
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break;
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}
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}
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if( mode != VALUE )
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return true;
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if( visibleLength )
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value.resize( visibleLength );
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return false;
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}
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///////////////////////////////////////////////////////////////////////////////
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}} // namespace mp4v2::util
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