update_dictionaty.cpp

小型数据库源代码较多

#include "min.h"

void sql::Update_Dictionary()
{
	for( int j = 0; j < sbf ; j++)
		buf[0][j] = '\0';
	ostrstream out( buf[0], sbf );
	Table* table;
	Table* temp;
	Col* col;
	Col* tempc;
	table = tablehead;
	if( table->next != NULL)
	{
		for(  ;table->next ;)
		{
			temp = table;
			table = table->next;
			delete temp;
			out << setw(10) << table->name
				<< setw(5) << table->num 
				<< setw(5) << table->col ;
			col = table->collist;
			for(; col->next; )
			{
				tempc = col;
				col = col->next;
				delete tempc;
				out << '\t';
				out << col->name << " " << col->type 
					<< col->att	<< col->len << " ";
				if ( col->indexname.compare(""))
					out	<< col->indexname << " ";
				out << ',';				
			}
			delete col;
			out << '\n';
		}	
	out << '&' ;
	}
	delete table;
	//cout << tablehead;

	fstream dir_file;		
	dir_file.open( "dir_file.dtb",ios::out|ios::trunc );
	if( dir_file.fail() )
		throw 10;
	
	dir_file.write ( buf[0], strlen(buf[0]));
	dir_file.close();
}