path: root/examples/print.c

// SPDX-License-Identifier: LGPL-3.0-or-later

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

int main(int argc, char **argv) {
	argc--;
	argv++;
	if(argc % 2 != 0) {
		return 1;
	}

	(void)argc;
	(void)argv;

	int dfd = open("dbdir", O_RDONLY | O_DIRECTORY | O_CLOEXEC);
	if(dfd < 0) {
		fprintf(stderr, "Failed to open dbdir: %s\n", strerror(errno));
		return 1;
	}

	hkvs_io *io = hkvs_io_new_unsafe_dirfd(dfd);
	if(!io) {
		fprintf(stderr, "Failed to create hkvs_io\n");
		return 1;
	}

	hkvs *c;
	int r = hkvs_new(&c, io);
	if(r < 0) {
		fprintf(stderr, "Failed to open database: %s\n", strerror(-r));
		return 1;
	}

	for(size_t i = 0;; i++) {
		hkvs_table *t = hkvs_table_at(c, i);
		if(!t) break;
		size_t key_size = hkvs_table_key_size(c, t);

		printf("Table %zu: %u [key size = %zu]\n", i, hkvs_table_id(c, t), key_size);

		hkvs_iter it;
		hkvs_iter_open(c, t, &it);
		const char *key;
		for(hkvs_rid rid; hkvs_rid_ok((rid = hkvs_iter_next(c, t, &it, &key)));) {
			char *val;
			size_t val_size;
			r = hkvs_record_value(c, t, rid, &val, &val_size);
			if(r < 0) {
				fprintf(stderr, "Error: %s\n", strerror(-r));
				return 1;
			}

			printf("[%llu] %.*s: [%zu] %.*s\n", (unsigned long long)rid.id, (int)key_size, key, val_size, (int)val_size, val);
		}
	}

	hkvs_free(c);
}