tokyo cabinet B+ tree multi-value example

main.c

//			char *str; size_t size;
//			FILE *f = open_memstream(&str, &size);
//				tex_tr_print(parser_root, f);
//			fclose(f);
//			printf("str=\n%s||size=%ld\n", str, size);
//			free(str);

#include <tcutil.h>
#include <tcbdb.h>

enum {
	DB_OMOD_WR,
	DB_OMOD_RD
};

void *db_init(const char *name, int mod)
{
	TCBDB *bdb = tcbdbnew();

	if (mod == DB_OMOD_WR) {
		if (!tcbdbopen(bdb, name, BDBOCREAT | BDBOWRITER)) 
			return NULL;
	} else if (mod == DB_OMOD_RD) {
		if (!tcbdbopen(bdb, name, BDBOREADER)) 
			return NULL;
	}

	return bdb;
}

void db_release(void *db)
{
	tcbdbclose((TCBDB*)db);
	tcbdbdel((TCBDB*)db);
}

uint64_t db_records(void *db)
{
	return tcbdbrnum((TCBDB*)db);
}

void db_sync(void *db)
{
	tcbdbsync((TCBDB*)db);
}

const char *db_last_err(void *db)
{
	return tcbdberrmsg(tcbdbecode(db));
}

#include <stdio.h>

#include <stdint.h>
#include <inttypes.h>

int
main()
{
	int vnum;
	int i;
	int integer = 123;
	TCLIST *li;
//	void *db = db_init("test.db", DB_OMOD_WR);
	void *db = db_init("test.db", DB_OMOD_RD);
	printf("%" PRIu64 " records.\n", db_records(db));

//	tcbdbputdup2((TCBDB*)db, "good", "boy");
//	tcbdbputdup((TCBDB*)db, "good", 4, &integer, sizeof(int));
//	tcbdbputdup2((TCBDB*)db, "good", "dog");
//	tcbdbputdup2((TCBDB*)db, "bad", "ass");

	vnum = tcbdbvnum2((TCBDB*)db, "good");
	printf("number of values: %d\n", vnum);
	vnum = tcbdbvnum2((TCBDB*)db, "bad");
	printf("number of values: %d\n", vnum);
	
	li = tcbdbget4((TCBDB*)db, "good", 4);

	for (i = 0; i < tclistnum(li); i++) {
		if (i == 1) {
			int sz;
			int *val = (int *)tclistval(li, i, &sz);
			printf("val %d: %d (size=%d)\n", i, *val, sz);
		} else {
			printf("val %d: %s\n", i, tclistval2(li, i));
		}
	}
	tclistdel(li);

	li = tcbdbget4((TCBDB*)db, "bad", 3);

	for (i = 0; i < tclistnum(li); i++) {
		printf("val %d: %s\n", i, tclistval2(li, i));
	}
	tclistdel(li);

	db_release(db);

	return 0;
}