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mdbx: add tutorial/sample-mdbx.c and drop obsolete sample-mdb.txt.

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Also this is a testcase for https://github.com/leo-yuriev/libmdbx/issues/11.

Change-Id: I95c876b1120c1479b2e740b43f6c60e2ac8b33c1
This commit is contained in:
dreamsxin 2017-08-16 03:53:06 +03:00 committed by Leo Yuriev
parent 9b5e28e8e6
commit b0dc98bec0
5 changed files with 95 additions and 67 deletions
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1
AUTHORS
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@ -6,6 +6,7 @@ Chris Mikkelson <cmikk@qwest.net>
Claude Brisson <claude.brisson@gmail.com>
David Barbour <dmbarbour@gmail.com>
David Wilson <dw@botanicus.net>
dreamsxin <dreamsxin@126.com>
Hallvard Furuseth <hallvard@openldap.org>, <h.b.furuseth@usit.uio.no>
Heiko Becker <heirecka@exherbo.org>
Howard Chu <hyc@openldap.org>, <hyc@symas.com>

5
Makefile
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@ -53,10 +53,13 @@ TEST_OBJ := $(patsubst %.cc,%.o,$(TEST_SRC))
.PHONY: mdbx all install clean check coverage
all: $(LIBRARIES) $(TOOLS) test/test
all: $(LIBRARIES) $(TOOLS) test/test example
mdbx: libmdbx.a libmdbx.so
example: mdbx.h tutorial/sample-mdbx.c libmdbx.so
$(CC) $(CFLAGS) -I. tutorial/sample-mdbx.c ./libmdbx.so -o example
tools: $(TOOLS)
install: $(LIBRARIES) $(TOOLS) $(HEADERS)

1
libmdbx.files
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@ -1,3 +1,4 @@
tutorial/sample-mdbx.c
AUTHORS
LICENSE
Makefile

66
tutorial/sample-mdb.txt
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@ -1,66 +0,0 @@
/* sample-mdb.txt - MDB toy/sample
*
* Do a line-by-line comparison of this and sample-bdb.txt
*/
/*
* Copyright 2015-2017 Leonid Yuriev <leo@yuriev.ru>.
* Copyright 2012-2015 Howard Chu, Symas Corp.
* Copyright 2015,2016 Peter-Service R&D LLC.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include <stdio.h>
#include "mdbx.h"
int main(int argc,char * argv[])
{
int rc;
MDBX_env *env;
MDBX_dbi dbi;
MDBX_val key, data;
MDBX_txn *txn;
MDBX_cursor *cursor;
char sval[32];
/* Note: Most error checking omitted for simplicity */
rc = mdbx_env_create(&env);
rc = mdbx_env_open(env, "./testdb", 0, 0664);
rc = mdbx_txn_begin(env, NULL, 0, &txn);
rc = mdbx_dbi_open(txn, NULL, 0, &dbi);
key.iov_len = sizeof(int);
key.iov_base = sval;
data.iov_len = sizeof(sval);
data.iov_base = sval;
sprintf(sval, "%03x %d foo bar", 32, 3141592);
rc = mdbx_put(txn, dbi, &key, &data, 0);
rc = mdbx_txn_commit(txn);
if (rc) {
fprintf(stderr, "mdbx_txn_commit: (%d) %s\n", rc, mdbx_strerror(rc));
goto leave;
}
rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn);
rc = mdbx_cursor_open(txn, dbi, &cursor);
while ((rc = mdbx_cursor_get(cursor, &key, &data, MDBX_NEXT)) == 0) {
printf("key: %p %.*s, data: %p %.*s\n",
key.iov_base, (int) key.iov_len, (char *) key.iov_base,
data.iov_base, (int) data.iov_len, (char *) data.iov_base);
}
mdbx_cursor_close(cursor);
mdbx_txn_abort(txn);
leave:
mdbx_dbi_close(env, dbi);
mdbx_env_close(env);
return 0;
}

89
tutorial/sample-mdbx.c Normal file
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@ -0,0 +1,89 @@
/* sample-mdb.txt - MDB toy/sample
*
* Do a line-by-line comparison of this and sample-bdb.txt
*/
/*
* Copyright 2017 Ilya Shipitsin <chipitsine@gmail.com>.
* Copyright 2015-2017 Leonid Yuriev <leo@yuriev.ru>.
* Copyright 2012-2015 Howard Chu, Symas Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include "mdbx.h"
#include <stdio.h>
int main(int argc, char *argv[]) {
(void)argc;
(void)argv;
int rc;
MDBX_env *env;
MDBX_dbi dbi;
MDBX_val key, data;
MDBX_txn *txn;
MDBX_cursor *cursor;
char sval[32];
rc = mdbx_env_create(&env);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_env_create: (%d) %s\n", rc, mdbx_strerror(rc));
return 0;
}
rc = mdbx_env_open(env, "./example-db",
MDBX_NOSUBDIR | MDBX_COALESCE | MDBX_LIFORECLAIM, 0664);
if (rc != MDBX_SUCCESS) {
mdbx_env_close(env);
fprintf(stderr, "mdbx_env_open: (%d) %s\n", rc, mdbx_strerror(rc));
return 0;
}
rc = mdbx_txn_begin(env, NULL, 0, &txn);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_txn_begin: (%d) %s\n", rc, mdbx_strerror(rc));
goto leave;
}
rc = mdbx_dbi_open(txn, NULL, 0, &dbi);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_dbi_open: (%d) %s\n", rc, mdbx_strerror(rc));
goto leave;
}
key.iov_len = sizeof(int);
key.iov_base = sval;
data.iov_len = sizeof(sval);
data.iov_base = sval;
sprintf(sval, "%03x %d foo bar", 32, 3141592);
rc = mdbx_put(txn, dbi, &key, &data, 0);
if (rc != MDBX_SUCCESS) {
fprintf(stderr, "mdbx_put: (%d) %s\n", rc, mdbx_strerror(rc));
goto leave;
}
rc = mdbx_txn_commit(txn);
if (rc) {
fprintf(stderr, "mdbx_txn_commit: (%d) %s\n", rc, mdbx_strerror(rc));
goto leave;
}
rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn);
rc = mdbx_cursor_open(txn, dbi, &cursor);
while ((rc = mdbx_cursor_get(cursor, &key, &data, MDBX_NEXT)) == 0) {
printf("key: %p %.*s, data: %p %.*s\n", key.iov_base, (int)key.iov_len,
(char *)key.iov_base, data.iov_base, (int)data.iov_len,
(char *)data.iov_base);
}
mdbx_cursor_close(cursor);
mdbx_txn_abort(txn);
leave:
mdbx_dbi_close(env, dbi);
mdbx_env_close(env);
return 0;
}