example.txt
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:2k
- #include <sys/types.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "db.h"
- #define DATABASE "access.db"
- int
- main()
- {
- DB *dbp;
- DBT key, data;
- int ret, t_ret;
- /* Create the database handle and open the underlying database. */
- if ((ret = db_create(&dbp, NULL, 0)) != 0) {
- fprintf(stderr, "db_create: %sn", db_strerror(ret));
- exit (1);
- }
- if ((ret =
- dbp->open(dbp, DATABASE, NULL, DB_BTREE, DB_CREATE, 0664)) != 0) {
- dbp->err(dbp, ret, "%s", DATABASE);
- goto err;
- }
- /* Initialize key/data structures. */
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- key.data = "fruit";
- key.size = sizeof("fruit");
- data.data = "apple";
- data.size = sizeof("apple");
- /* Store a key/data pair. */
- if ((ret = dbp->put(dbp, NULL, &key, &data, 0)) == 0)
- printf("db: %s: key stored.n", (char *)key.data);
- else {
- dbp->err(dbp, ret, "DB->put");
- goto err;
- }
- /* Retrieve a key/data pair. */
- if ((ret = dbp->get(dbp, NULL, &key, &data, 0)) == 0)
- printf("db: %s: key retrieved: data was %s.n",
- (char *)key.data, (char *)data.data);
- else {
- dbp->err(dbp, ret, "DB->get");
- goto err;
- }
- /* Delete a key/data pair. */
- if ((ret = dbp->del(dbp, NULL, &key, 0)) == 0)
- printf("db: %s: key was deleted.n", (char *)key.data);
- else {
- dbp->err(dbp, ret, "DB->del");
- goto err;
- }
- /* Retrieve a key/data pair. */
- if ((ret = dbp->get(dbp, NULL, &key, &data, 0)) == 0)
- printf("db: %s: key retrieved: data was %s.n",
- (char *)key.data, (char *)data.data);
- else
- dbp->err(dbp, ret, "DB->get");
- err: if ((t_ret = dbp->close(dbp, 0)) != 0 && ret == 0)
- ret = t_ret;
- exit(ret);
- }