testcursor.c

来自「这是我用QT和TTS写的一个电话本管理系统」· C语言 代码 · 共 36 行

#include <db.h>
#include <string.h>
DB *dbp;
DBC *cursorp;
DBT key, data;
char *key1str = "My first string";
char *replacement_data = "replace me";
int ret;
/* Initialize our DBTs. */
memset(&key, 0, sizeof(DBT));
memset(&data, 0, sizeof(DBT));
/* Set up our DBTs */
key.data = key1str;
key.size = strlen(key1str) + 1;

/* Database open omitted */

/* Get the cursor */
dbp->cursor(dbp, NULL, &cursorp, 0);

/* Position the cursor */
ret = cursorp->get(cursorp, &key, &data, DB_SET);
if (ret == 0) 
{
    data.data = replacement_data;
    data.size = strlen(replacement_data) + 1;
    cursorp->put(cursorp, &key, &data, DB_CURRENT);
}

/* Cursors must be closed */
if (cursorp != NULL) 
    cursorp->close(cursorp); 

if (dbp != NULL)
    dbp->close(dbp, 0);