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const std = @import("std");
const lmdb = @cImport(@cInclude("lmdb.h"));
const print = std.debug.print;
fn get(txn: ?*lmdb.MDB_txn, dbi: lmdb.MDB_dbi, k: anytype, comptime T: type) ?T {
var key = lmdb.MDB_val{
.mv_size = @sizeOf(@TypeOf(k)),
.mv_data = @constCast(@ptrCast(&k)),
};
var val: lmdb.MDB_val = undefined;
return switch (lmdb.mdb_get(txn, dbi, &key, &val)) {
0 => @as(*T, @ptrFromInt(@intFromPtr(val.mv_data))).*,
else => |err| {
_ = err;
// print("get err: {}\n", .{err});
return null;
},
};
}
fn put(txn: ?*lmdb.MDB_txn, dbi: lmdb.MDB_dbi, k: anytype, v: anytype) void {
var key = lmdb.MDB_val{
.mv_size = @sizeOf(@TypeOf(k)),
.mv_data = @constCast(@ptrCast(&k)),
};
var val = lmdb.MDB_val{
.mv_size = @sizeOf(@TypeOf(v)),
.mv_data = @constCast(@ptrCast(&v)),
};
switch (lmdb.mdb_put(txn, dbi, &key, &val, 0)) {
0 => {},
else => |err| {
print("put err: {}\n", .{err});
},
}
}
pub fn main() void {
var env: ?*lmdb.MDB_env = undefined;
_ = lmdb.mdb_env_create(&env);
_ = lmdb.mdb_env_set_maxdbs(env, 10);
_ = lmdb.mdb_env_set_mapsize(env, 1024 * 1024 * 120);
_ = lmdb.mdb_env_open(env, "./db1", lmdb.MDB_NOSYNC | lmdb.MDB_WRITEMAP, 0o664);
defer lmdb.mdb_env_close(env);
for (0..1000000) |i| {
var txn: ?*lmdb.MDB_txn = undefined;
switch (lmdb.mdb_txn_begin(env, null, 0, &txn)) {
0 => {},
else => |err| {
print("txn err: {}\n", .{err});
},
}
var db: lmdb.MDB_dbi = undefined;
_ = lmdb.mdb_dbi_open(txn, "subdb2", lmdb.MDB_CREATE | lmdb.MDB_INTEGERKEY, &db);
if (i == 0) {
var db_stat: lmdb.MDB_stat = undefined;
_ = lmdb.mdb_stat(txn, db, &db_stat);
// print("{}\n", .{db_stat});
}
defer lmdb.mdb_dbi_close(env, db);
const Val = struct {
a: u64,
b: i64,
c: [16]u8,
};
var new_val = Val{
.a = 123,
.b = -123,
.c = undefined,
};
std.mem.copyForwards(u8, &new_val.c, "a c efghabcdefgh");
const key: u64 = i + 1000;
if (get(txn, db, key, Val)) |val| {
if (i % 100000 == 0) {
print("{}: {}\n", .{ i, val });
}
new_val = val;
new_val.a += 1;
new_val.b -= 1;
std.mem.copyForwards(u8, &new_val.c, "a c efghabcdefgh");
} else {
if (i % 100000 == 0) {
print("not found\n", .{});
}
}
put(txn, db, key, new_val);
switch (lmdb.mdb_txn_commit(txn)) {
0 => {},
lmdb.MDB_MAP_FULL => {
print("resize\n", .{});
_ = lmdb.mdb_env_set_mapsize(env, 0);
},
else => |err| {
print("commit err: {}\n", .{err});
},
}
}
switch (lmdb.mdb_env_sync(env, 1)) {
0 => {},
else => |err| {
print("sync err: {}\n", .{err});
},
}
// var env_info: lmdb.MDB_envinfo = undefined;
// _ = lmdb.mdb_env_info(env, &env_info);
// var env_stat: lmdb.MDB_stat = undefined;
// _ = lmdb.mdb_env_stat(env, &env_stat);
// print("{}\n", .{env_info});
// print("{}\n", .{env_stat});
print("done!\n", .{});
}
test "hash" {
const pw = "affeaffe";
var hash_buffer: [128]u8 = undefined;
var buffer: [1024 * 1024]u8 = undefined;
var alloc = std.heap.FixedBufferAllocator.init(&buffer);
const result = try std.crypto.pwhash.argon2.strHash(pw, .{
.allocator = alloc.allocator(),
.params = std.crypto.pwhash.argon2.Params.fromLimits(1000, 1024 * 10),
}, &hash_buffer);
print("{s}\n", .{result});
if (std.crypto.pwhash.argon2.strVerify(result, "affeaffe", .{
.allocator = alloc.allocator(),
})) {
print("verified\n", .{});
} else |err| {
print("not verified: {}\n", .{err});
}
}
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