本文整理汇总了C++中DB_ENV::prdbt方法的典型用法代码示例。如果您正苦于以下问题：C++ DB_ENV::prdbt方法的具体用法？C++ DB_ENV::prdbt怎么用？C++ DB_ENV::prdbt使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DB_ENV的用法示例。
在下文中一共展示了DB_ENV::prdbt方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: load
int DbWrapper::load(std::istream *in, unsigned long *lineno)
{
int version, ret, t_ret;
DBTYPE dbtype;
char *subdb = 0;
u_int32_t read_flags, tflags;
DBT key, data;
db_recno_t recno, datarecno;
DB_ENV *dbenv = environment_;
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
if ((ret = __db_rheader(dbenv, db_, &dbtype,
&subdb, &version, &read_flags, read_callback, in, lineno)) != 0)
goto err;
/* We always print with keys */
if (!(read_flags & DB_READ_HASKEYS)) {
db_->errx(db_, "Invalid DbXml dump: keys missing");
ret = EINVAL;
goto err;
}
if ((ret = open(NULL, dbtype, DB_CREATE|DB_EXCL)) != 0)
goto err;
/* Initialize the key/data pair. */
if (dbtype == DB_RECNO || dbtype == DB_QUEUE) {
key.size = sizeof(recno);
key.data = &datarecno;
} else {
key.ulen = 1024;
key.data = (void *)malloc(key.ulen);
}
data.ulen = 1024;
data.data = (void *)malloc(data.ulen);
if (key.data == NULL || data.data == NULL) {
db_->err(db_, ENOMEM, NULL);
goto err;
}
// work around gcc optimizer issue that seems to modify
// read_flags (4.1.1 on 64-bit linux)
tflags = read_flags;
/* Get each key/data pair and add them to the database. */
for (recno = 1;; ++recno) {
if ((ret = __db_rdbt(dbenv, &key, &data,
tflags, read_callback, in, lineno)) != 0) {
if (ret == EOF)
ret = 0;
break;
}
switch (ret = db_->put(db_, NULL, &key, &data, 0)) {
case 0:
break;
case DB_KEYEXIST:
db_->errx(db_, "line %d: key already exists, not loaded:", *lineno);
dbenv->prdbt(&key, tflags & DB_READ_PRINTABLE,
0, &std::cerr, pr_callback, 0);
break;
default:
db_->err(db_, ret, NULL);
goto err;
}
}
err: /* Close the database. */
if ((t_ret = close(0)) != 0 && ret == 0)
ret = t_ret;
/* Free allocated memory. */
if (subdb != NULL)
free(subdb);
if (key.data != NULL && dbtype != DB_RECNO && dbtype != DB_QUEUE)
free(key.data);
if (data.data != NULL)
free(data.data);
return (ret);
}