70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "db.h"
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// refer: https://docs.oracle.com/cd/E17076_05/html/gsg/C/BerkeleyDB-Core-C-GSG.pdf
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// Access Methods:
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// 1. BTree
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// 2. Hash
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// 3. Queue
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// 4. Recno
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#define USE_ENV 0
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int main(int argc, char const *argv[]) {
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DB * dbp = NULL;
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u_int32_t db_flags;
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DB_ENV * envp = NULL;
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u_int32_t env_flags;
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int ret;
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DBT key, value; // Database records
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#if USE_ENV
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// Initialize an env object and open it for
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ret = db_env_create(&envp, 0);
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if (ret != 0) {
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fprintf(stderr, "Error creating env handle: %s\n", db_strerror(ret));
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return -1;
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}
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env_flags = DB_CREATE | DB_INIT_MPOOL;
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ret = envp->open(envp, "./meta", env_flags, 0);
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if (ret != 0) {
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fprintf(stderr, "Error opening env handle: %s\n", db_strerror(ret));
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return -1;
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}
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#endif
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// Initialize a DB handle and open the DB
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ret = db_create(&dbp, envp, 0);
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if (ret != 0) {
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exit(1);
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}
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db_flags = DB_CREATE;
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ret = dbp->open(dbp, /* DB structure pointer */
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NULL, /* Transaction pointer */
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"meta.db", /* On-disk file that holds the database */
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NULL, /* Optional logical database name */
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DB_BTREE, /* Database access method */
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db_flags, /* Open flags */
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0); /* File mode */
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if (ret != 0) {
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exit(1);
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}
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// Close the database
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if (dbp != NULL) {
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dbp->close(dbp, 0);
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}
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if (envp != NULL) {
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envp->close(envp, 0);
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}
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return 0;
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}
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