ccan/ccan/tdb2/_info

#include <string.h>
#include <stdio.h>

/**
 * tdb2 - [[WORK IN PROGRESS!]] The trivial (64bit transactional) database
 *
 * The tdb2 module provides an efficient keyword data mapping (usually
 * within a file).  It supports transactions, so the contents of the
 * database is reliable even across crashes.
 *
 * Example:
 *	#include <ccan/tdb2/tdb2.h>
 *	#include <ccan/str/str.h>
 *	#include <err.h>
 *	#include <stdio.h>
 *	
 *	static void usage(const char *argv0)
 *	{
 *		errx(1, "Usage: %s fetch <dbfile> <key>\n"
 *		     "OR %s store <dbfile> <key> <data>", argv0, argv0);
 *	}
 *	
 *	int main(int argc, char *argv[])
 *	{
 *		struct tdb_context *tdb;
 *		TDB_DATA key, value;
 *		enum TDB_ERROR error;
 *
 *		if (argc < 4)
 *			usage(argv[0]);
 *	
 *		tdb = tdb_open(argv[2], TDB_DEFAULT, O_CREAT|O_RDWR,0600, NULL);
 *		if (!tdb)
 *			err(1, "Opening %s", argv[2]);
 *	
 *		key.dptr = (void *)argv[3];
 *		key.dsize = strlen(argv[3]);
 *	
 *		if (streq(argv[1], "fetch")) {
 *			if (argc != 4)
 *				usage(argv[0]);
 *			error = tdb_fetch(tdb, key, &value);
 *			if (error)
 *				errx(1, "fetch %s: %s",
 *				     argv[3], tdb_errorstr(error));
 *			printf("%.*s\n", value.dsize, (char *)value.dptr);
 *			free(value.dptr);
 *		} else if (streq(argv[1], "store")) {
 *			if (argc != 5)
 *				usage(argv[0]);
 *			value.dptr = (void *)argv[4];
 *			value.dsize = strlen(argv[4]);
 *			error = tdb_store(tdb, key, value, 0);
 *			if (error)
 *				errx(1, "store %s: %s",
 *				     argv[3], tdb_errorstr(error));
 *		} else
 *			usage(argv[0]);
 *	
 *		return 0;
 *	}
 *
 * Maintainer: Rusty Russell <rusty@rustcorp.com.au>
 *
 * Author: Rusty Russell
 *
 * License: LGPLv3 (or later)
 *
 * Ccanlint:
 *	// hash fails because it accesses data in 4 byte quantities for speed.
 *	tests_pass_valgrind --partial-loads-ok=yes
 */
int main(int argc, char *argv[])
{
	if (argc != 2)
		return 1;

	if (strcmp(argv[1], "depends") == 0) {
		printf("ccan/hash\n");
		printf("ccan/likely\n");
		printf("ccan/asearch\n");
		printf("ccan/compiler\n");
		printf("ccan/build_assert\n");
		printf("ccan/ilog\n");
		printf("ccan/failtest\n");
		printf("ccan/tally\n");
		return 0;
	}

	return 1;
}