/*NOTE: AccessExample changed to test Db.key_range. * We made a global change of /AccessExample/TestKeyRange/, * the only other changes are marked with comments that * are notated as 'ADDED'. *//*- * See the file LICENSE for redistribution information. * * Copyright (c) 1997-2002 *	Sleepycat Software.  All rights reserved. * * $Id: TestKeyRange.cpp,v 1.4 2002/01/23 14:26:41 bostic Exp $ */#ifndef NO_SYSTEM_INCLUDES#include <sys/types.h>#include <iostream.h>#include <errno.h>#include <stdlib.h>#include <string.h>#ifndef _MSC_VER#include <unistd.h>#endif#endif#include <iomanip.h>#include <db_cxx.h>class TestKeyRange{public:	TestKeyRange();	void run();private:	static const char FileName[];	// no need for copy and assignment	TestKeyRange(const TestKeyRange &);	void operator = (const TestKeyRange &);};static void usage();          // forwardint main(int argc, char *argv[]){	if (argc > 1) {		usage();	}	// Use a try block just to report any errors.	// An alternate approach to using exceptions is to	// use error models (see DbEnv::set_error_model()) so	// that error codes are returned for all Berkeley DB methods.	//	try {		TestKeyRange app;		app.run();		return 0;	}	catch (DbException &dbe) {		cerr << "TestKeyRange: " << dbe.what() << "\n";		return 1;	}}static void usage(){	cerr << "usage: TestKeyRange\n";	exit(1);}const char TestKeyRange::FileName[] = "access.db";TestKeyRange::TestKeyRange(){}void TestKeyRange::run(){	// Remove the previous database.	(void)unlink(FileName);	// Create the database object.	// There is no environment for this simple example.	Db db(0, 0);	db.set_error_stream(&cerr);	db.set_errpfx("TestKeyRange");	db.set_pagesize(1024);		/* Page size: 1K. */	db.set_cachesize(0, 32 * 1024, 0);	db.open(NULL, FileName, NULL, DB_BTREE, DB_CREATE, 0664);	//	// Insert records into the database, where the key is the user	// input and the data is the user input in reverse order.	//	char buf[1024];	char rbuf[1024];	char *t;	char *p;	int ret;	int len;	Dbt *firstkey = NULL;	char firstbuf[1024];	for (;;) {		cout << "input>";		cout.flush();		cin.getline(buf, sizeof(buf));		if (cin.eof())			break;		if ((len = strlen(buf)) <= 0)			continue;		for (t = rbuf, p = buf + (len - 1); p >= buf;)			*t++ = *p--;		*t++ = '\0';		Dbt key(buf, len + 1);		Dbt data(rbuf, len + 1);		if (firstkey == NULL) {			strcpy(firstbuf, buf);			firstkey = new Dbt(firstbuf, len + 1);		}		ret = db.put(0, &key, &data, DB_NOOVERWRITE);		if (ret == DB_KEYEXIST) {			cout << "Key " << buf << " already exists.\n";		}		cout << "\n";	}	// We put a try block around this section of code	// to ensure that our database is properly closed	// in the event of an error.	//	try {		// Acquire a cursor for the table.		Dbc *dbcp;		db.cursor(NULL, &dbcp, 0);		/*ADDED...*/		DB_KEY_RANGE range;		memset(&range, 0, sizeof(range));		db.key_range(NULL, firstkey, &range, 0);		printf("less: %f\n", range.less);		printf("equal: %f\n", range.equal);		printf("greater: %f\n", range.greater);		/*end ADDED*/		Dbt key;		Dbt data;		// Walk through the table, printing the key/data pairs.		while (dbcp->get(&key, &data, DB_NEXT) == 0) {			char *key_string = (char *)key.get_data();			char *data_string = (char *)data.get_data();			cout << key_string << " : " << data_string << "\n";		}		dbcp->close();	}	catch (DbException &dbe) {		cerr << "TestKeyRange: " << dbe.what() << "\n";	}	db.close(0);}