Use rocksdb in Zig!

rocksdb-demo.zig

const std = @import("std");
pub const c = @cImport({
    @cInclude("rocksdb/c.h");
});

const key = "hello";
const value = "world";

pub fn main() !void {
    const opts = c.rocksdb_options_create();
    c.rocksdb_options_set_create_if_missing(opts, 1);
    var err: ?[*:0]u8 = null;
    const c_handle = c.rocksdb_open(
        opts,
        "/tmp/rocksdb.test",
        &err,
    );
    if (err) |e| {
        std.log.err("Error when open: {s}", .{e});
        c.rocksdb_free(err);
        return error.OpenDatabase;
    }
    defer c.rocksdb_close(c_handle);

    const write_opts = c.rocksdb_writeoptions_create();
    c.rocksdb_put(c_handle, write_opts, key.ptr, key.len, value, value.len, &err);
    if (err) |e| {
        std.log.err("Error when put: {s}", .{e});
        c.rocksdb_free(err);
        return error.Put;
    }

    const read_opts = c.rocksdb_readoptions_create();
    var res_len: usize = 0;
    const res = c.rocksdb_get(c_handle, read_opts, key.ptr, key.len, &res_len, &err);
    if (err) |e| {
        std.log.err("Error when get: {s}", .{e});
        c.rocksdb_free(err);
        return error.Get;
    }
    defer c.rocksdb_free(res);

    std.debug.print("Value: {s}\n", .{res[0..res_len]});
}