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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997, 2015 Oracle and/or its affiliates. All rights reserved.
*
* $Id$
*/
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
extern int getopt(int, char * const *, const char *);
#else
#include <unistd.h>
#endif
#include <db.h>
#define DATABASE "stream.db"
#define CHUNK_SIZE 500
#define DATA_SIZE CHUNK_SIZE * 100
int main __P((int, char *[]));
int usage __P((void));
int invarg __P((const char *, int, const char *));
int
main(argc, argv)
int argc;
char *argv[];
{
extern char *optarg;
extern int optind;
DB *dbp;
DBC *dbcp;
DBT key, data;
DBTYPE db_type;
int ch, chunk_sz, chunk_off, data_sz, i, ret, rflag;
int page_sz;
char *database, *buf;
const char *progname = "ex_stream"; /* Program name. */
chunk_sz = CHUNK_SIZE;
data_sz = DATA_SIZE;
chunk_off = page_sz = rflag = 0;
db_type = DB_BTREE;
while ((ch = getopt(argc, argv, "c:d:p:t:")) != EOF)
switch (ch) {
case 'c':
if ((chunk_sz = atoi(optarg)) <= 0)
return (invarg(progname, ch, optarg));
break;
case 'd':
if ((data_sz = atoi(optarg)) <= 0)
return (invarg(progname, ch, optarg));
break;
case 'p':
if ((page_sz = atoi(optarg)) <= 0 ||
page_sz % 2 != 0 || page_sz < 512 ||
page_sz > 64 * 1024)
return (invarg(progname, ch, optarg));
break;
case 't':
switch (optarg[0]) {
case 'b':
db_type = DB_BTREE;
break;
case 'h':
db_type = DB_HASH;
break;
case 'r':
db_type = DB_RECNO;
break;
default:
return (invarg(progname, ch, optarg));
break;
}
break;
case '?':
default:
return (usage());
}
argc -= optind;
argv += optind;
/* Accept optional database name. */
database = *argv == NULL ? DATABASE : argv[0];
if (chunk_sz > data_sz) {
fprintf(stderr,
"Chunk size must be less than and a factor of the data size\n");
return (usage());
}
/* Discard any existing database. */
(void)remove(database);
/* Create and initialize database object, open the database. */
if ((ret = db_create(&dbp, NULL, 0)) != 0) {
fprintf(stderr,
"%s: db_create: %s\n", progname, db_strerror(ret));
return (EXIT_FAILURE);
}
dbp->set_errfile(dbp, stderr);
dbp->set_errpfx(dbp, progname);
if (page_sz != 0 && (ret = dbp->set_pagesize(dbp, page_sz)) != 0) {
dbp->err(dbp, ret, "set_pagesize");
goto err1;
}
if ((ret = dbp->set_cachesize(dbp, 0, 32 * 1024, 0)) != 0) {
dbp->err(dbp, ret, "set_cachesize");
goto err1;
}
if ((ret = dbp->open(dbp,
NULL, database, NULL, db_type, DB_CREATE, 0664)) != 0) {
dbp->err(dbp, ret, "%s: open", database);
goto err1;
}
/* Ensure the data size is a multiple of the chunk size. */
data_sz = data_sz - (data_sz % chunk_sz);
/* Initialize the key/data pair for a streaming insert. */
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
key.data = &chunk_sz; /* Our key value does not really matter. */
key.size = sizeof(int);
data.ulen = data_sz;
data.size = chunk_sz;
data.data = buf = malloc(data_sz);
data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
/* Populate the data with something. */
for (i = 0; i < data_sz; ++i)
buf[i] = (char)('a' + i % ('z' - 'a'));
if ((ret = dbp->cursor(dbp, NULL, &dbcp, 0)) != 0) {
dbp->err(dbp, ret, "DB->cursor");
goto err1;
}
for (chunk_off = 0; chunk_off < data_sz; chunk_off += chunk_sz) {
data.size = chunk_sz;
if ((ret = dbcp->put(dbcp, &key, &data,
(chunk_off == 0 ? DB_KEYFIRST : DB_CURRENT)) != 0)) {
dbp->err(dbp, ret, "DBCursor->put");
goto err2;
}
data.doff += chunk_sz;
}
if ((ret = dbcp->close(dbcp)) != 0) {
dbp->err(dbp, ret, "DBcursor->close");
goto err1;
}
memset(data.data, 0, data.ulen);
/* Retrieve the data item in chunks. */
if ((ret = dbp->cursor(dbp, NULL, &dbcp, 0)) != 0) {
dbp->err(dbp, ret, "DB->cursor");
goto err1;
}
data.doff = 0;
data.dlen = chunk_sz;
memset(data.data, 0, data.ulen);
/*
* Loop over the item, retrieving a chunk at a time.
* The requested chunk will be stored at the start of data.data.
*/
for (chunk_off = 0; chunk_off < data_sz; chunk_off += chunk_sz) {
if ((ret = dbcp->get(dbcp, &key, &data,
(chunk_off == 0 ? DB_SET : DB_CURRENT)) != 0)) {
dbp->err(dbp, ret, "DBCursor->get");
goto err2;
}
data.doff += chunk_sz;
}
if ((ret = dbcp->close(dbcp)) != 0) {
dbp->err(dbp, ret, "DBcursor->close");
goto err1;
}
if ((ret = dbp->close(dbp, 0)) != 0) {
fprintf(stderr,
"%s: DB->close: %s\n", progname, db_strerror(ret));
return (EXIT_FAILURE);
}
return (EXIT_SUCCESS);
err2: (void)dbcp->close(dbcp);
err1: (void)dbp->close(dbp, 0);
return (EXIT_FAILURE);
}
int
invarg(progname, arg, str)
const char *progname;
int arg;
const char *str;
{
(void)fprintf(stderr,
"%s: invalid argument for -%c: %s\n", progname, arg, str);
return (EXIT_FAILURE);
}
int
usage()
{
(void)fprintf(stderr,
"usage: ex_stream [-c int] [-d int] [-p int] [-t char] [database]\n");
(void)fprintf(stderr, "Where options are:\n");
(void)fprintf(stderr, "\t-c set the chunk size.\n");
(void)fprintf(stderr, "\t-d set the total record size.\n");
(void)fprintf(stderr,
"\t-t choose a database type btree (b), hash (h) or recno (r)\n");
return (EXIT_FAILURE);
}
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