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{"repo_name": "filedb", "file_name": "/filedb/src/oldfiles.zig", "inference_info": {"prefix_code": "const std = @import(\"std\");\nconst utils = @import(\"utils.zig\");\nconst Datafile = @import(\"datafile.zig\").Datafile;\n\npub ", "suffix_code": "\n\nconst ErrorMissingData = error{MissingData};\n", "middle_code": "const OldFiles = struct {\n filemap: std.AutoHashMap(u32, *Datafile),\n allocator: std.mem.Allocator,\n pub fn init(allocator: std.mem.Allocator, filemap: std.AutoHashMap(u32, *Datafile)) !*OldFiles {\n const oldfiles = try allocator.create(OldFiles);\n oldfiles.* = .{ .filemap = filemap, .allocator = allocator };\n return oldfiles;\n }\n pub fn initializeMap(self: *OldFiles, dir: std.fs.Dir) !void {\n const filelist = try utils.listAllDatabaseFiles(self.allocator, dir);\n for (filelist.items) |entry| {\n std.debug.print(\"Found file: {s}\", .{entry});\n const file_id = try utils.parseIdFromFilename(entry);\n const df = try Datafile.init(self.allocator, file_id, dir);\n try self.filemap.put(file_id, df);\n }\n for (filelist.items) |entry| {\n self.allocator.free(entry);\n }\n filelist.deinit();\n }\n pub fn deinit(self: *OldFiles) void {\n var keydirIterator = self.filemap.iterator();\n while (keydirIterator.next()) |entry| {\n entry.value_ptr.*.deinit();\n }\n self.filemap.deinit();\n self.allocator.destroy(self);\n }\n pub fn get(self: OldFiles, buf: []u8, file_id: u32, value_pos: usize, value_size: usize) !void {\n const df = self.filemap.get(file_id);\n if (df == null) {\n return error.EmptyDatafile;\n }\n return df.?.get(buf, value_pos, value_size);\n }\n};", "code_description": null, "fill_type": "FUNCTION_TYPE", "language_type": "zig", "sub_task_type": null}, "context_code": [["/filedb/src/filedb.zig", "const std = @import(\"std\");\nconst time = std.time;\nconst expect = std.testing.expect;\nconst Datafile = @import(\"datafile.zig\").Datafile;\nconst utils = @import(\"utils.zig\");\nconst Oldfiles = @import(\"oldfiles.zig\").OldFiles;\nconst kd = @import(\"keydir.zig\");\nconst record = @import(\"record.zig\");\nconst config = @import(\"config.zig\");\nconst Logger = @import(\"logger.zig\").Logger;\n\npub const FileDB = struct {\n datafile: *Datafile,\n keydir: std.StringHashMap(kd.Metadata),\n oldfiles: *Oldfiles,\n mu: std.Thread.Mutex,\n allocator: std.mem.Allocator,\n config: config.Options,\n log: Logger,\n compaction_thread: ?std.Thread = null,\n dfRotation_thread: ?std.Thread = null,\n sync_thread: ?std.Thread = null,\n should_shutdown: std.atomic.Value(bool) = std.atomic.Value(bool).init(false),\n\n // initialize the filedb with keydir and other structures\n pub fn init(allocator: std.mem.Allocator, options: ?config.Options) !*FileDB {\n var conf = config.defaultOptions();\n if (options) |option| {\n conf = option;\n }\n\n // Initialize oldfiles\n const oldfilesMap = std.AutoHashMap(u32, *Datafile).init(allocator);\n var dir = try utils.openUserDir(conf.dir);\n defer dir.close();\n const oldfiles = try Oldfiles.init(allocator, oldfilesMap);\n try oldfiles.initializeMap(dir);\n // Initialize keydir first\n const keydir = std.StringHashMap(kd.Metadata).init(allocator);\n\n const filedb = try allocator.create(FileDB);\n filedb.* = .{\n .mu = std.Thread.Mutex{},\n .allocator = allocator,\n .config = conf,\n .keydir = keydir,\n .oldfiles = oldfiles,\n .datafile = undefined, // Will be set after calculating the ID\n .log = Logger.init(conf.log_level),\n };\n filedb.log.info(\"============= STARTING FILEDB ================\", .{});\n // get the last used fileid\n var id: u32 = 1;\n var it = filedb.oldfiles.filemap.keyIterator();\n while (it.next()) |entry| {\n if (entry.* >= id) {\n id = entry.* + 1;\n }\n }\n filedb.log.debug(\"last used file id: {}\", .{id});\n filedb.datafile = try Datafile.init(allocator, id, dir);\n\n // Load keydir data\n try filedb.loadKeyDir();\n\n filedb.compaction_thread = try std.Thread.spawn(.{}, runCompaction, .{filedb});\n filedb.dfRotation_thread = try std.Thread.spawn(.{}, runRotation, .{filedb});\n filedb.sync_thread = try std.Thread.spawn(.{}, runSync, .{filedb});\n\n filedb.log.info(\"================== FileDB created ===============\", .{});\n return filedb;\n }\n\n pub fn deinit(self: *FileDB) void {\n self.should_shutdown.store(true, .release);\n\n // Join thread if it was started\n if (self.compaction_thread) |t| {\n t.join();\n }\n if (self.dfRotation_thread) |t| {\n t.join();\n }\n if (self.sync_thread) |t| {\n t.join();\n }\n\n self.storeHashMap() catch |err| {\n self.log.err(\"Error storing hashmap: {}\", .{err});\n };\n\n var key_it = self.keydir.iterator();\n while (key_it.next()) |entry| {\n self.allocator.free(entry.key_ptr.*);\n }\n\n self.keydir.deinit();\n\n // Clean up other resources\n self.oldfiles.deinit();\n self.datafile.deinit();\n\n // Finally free the FileDB struct itself\n self.log.info(\"SHUTTING DOWN FILEDB\", .{});\n self.allocator.destroy(self);\n }\n\n pub fn put(self: *FileDB, key: []const u8, value: []const u8) !void {\n self.mu.lock();\n defer self.mu.unlock();\n\n try utils.validateKV(key, value);\n try self.storeKV(self.datafile, key, value);\n }\n\n pub fn get(self: *FileDB, key: []const u8) !?[]const u8 {\n self.mu.lock();\n defer self.mu.unlock();\n\n const result = self.getValue(key);\n return result;\n }\n\n fn storeKV(self: *FileDB, datafile: *Datafile, key: []const u8, value: []const u8) !void {\n const rec = try record.Record.init(self.allocator, key, value);\n defer rec.deinit();\n\n const record_size = @sizeOf(record.Record) - @sizeOf([]u8) * 2 + rec.key_len + rec.value_len;\n const buf = try self.allocator.alloc(u8, record_size);\n defer self.allocator.free(buf);\n\n try rec.encode(buf);\n const offset = try datafile.store(buf);\n const metadata = kd.Metadata.init(datafile.id, record_size, offset, rec.tstamp);\n\n // get the entry if already present, if doesnt exist,\n // dynamically allocate a new key else reuse the old one.\n const entry = try self.keydir.getOrPut(key);\n if (!entry.found_existing) {\n const copy_key = try self.allocator.dupe(u8, key);\n entry.key_ptr.* = copy_key;\n }\n entry.value_ptr.* = metadata;\n\n //possible fsync\n if (self.config.alwaysFsync) {\n try self.datafile.sync();\n }\n }\n\n fn getValue(self: *FileDB, key: []const u8) !?[]const u8 {\n const metadata = self.keydir.get(key);\n if (metadata == null) {\n // if no key exists in the keydir\n return undefined;\n }\n\n const buf = try self.allocator.alloc(u8, metadata.?.value_sz);\n defer self.allocator.free(buf);\n if (self.datafile.id == metadata.?.file_id) {\n // get data from datafile\n try self.datafile.get(buf, metadata.?.value_pos, metadata.?.value_sz);\n } else {\n //get data from oldfiles\n try self.oldfiles.get(buf, metadata.?.file_id, metadata.?.value_pos, metadata.?.value_sz);\n }\n //decode data and put in response array\n const rec = try record.decodeRecord(self.allocator, buf);\n defer rec.deinit();\n\n const value = try self.allocator.dupe(u8, rec.value);\n return value;\n }\n\n pub fn delete(self: *FileDB, key: []const u8) !void {\n self.mu.lock();\n defer self.mu.unlock();\n\n // update the value of the key with a tombstone value\n const data = [_]u8{};\n try self.storeKV(self.datafile, key, &data);\n\n // remove the key from the keydir and deallocate the key memory.\n const entry = self.keydir.fetchRemove(key);\n if (entry) |e| {\n // Free the dynamically allocated key\n self.allocator.free(e.key);\n std.log.info(\"Deleted key: {s}\", .{key});\n } else {\n std.log.info(\"Key not found: {s}\", .{key});\n }\n }\n\n pub fn list(self: *FileDB, allocator: std.mem.Allocator) !std.ArrayList([]u8) {\n self.mu.lock();\n defer self.mu.unlock();\n\n // Initialize the array list\n var keylist = std.ArrayList([]u8).init(allocator);\n errdefer {\n // Free any keys we've already added if we encounter an error\n for (keylist.items) |item| {\n allocator.free(item);\n }\n keylist.deinit();\n }\n\n // Iterate through all keys in the map\n var key_itr = self.keydir.keyIterator();\n while (key_itr.next()) |entry| {\n // Duplicate the key\n const key = try allocator.dupe(u8, entry.*);\n // Try to append, free key if append fails\n keylist.append(key) catch |err| {\n allocator.free(key);\n return err;\n };\n }\n\n return keylist;\n }\n\n pub fn sync(self: *FileDB) !void {\n self.mu.lock();\n defer self.mu.unlock();\n\n try self.datafile.sync();\n }\n\n pub fn storeHashMap(self: *FileDB) !void {\n self.mu.lock();\n defer self.mu.unlock();\n try self.StoreHashMap();\n }\n\n fn StoreHashMap(self: *FileDB) !void {\n const path = try utils.openUserDir(self.config.dir);\n var file = try path.createFile(kd.HINTS_FILE, .{});\n defer file.close();\n var writer = file.writer();\n\n // Write number of hashmap entries\n try writer.writeInt(u32, @intCast(self.keydir.count()), std.builtin.Endian.little);\n var it = self.keydir.iterator();\n while (it.next()) |entry| {\n // Write key length and key\n try writer.writeInt(u32, @intCast(entry.key_ptr.*.len), std.builtin.Endian.little);\n try writer.writeAll(entry.key_ptr.*);\n\n const meta = entry.value_ptr.*;\n // Write number of metadata entries\n try writer.writeInt(u32, meta.file_id, std.builtin.Endian.little);\n try writer.writeInt(usize, meta.value_sz, std.builtin.Endian.little);\n try writer.writeInt(usize, meta.value_pos, std.builtin.Endian.little);\n try writer.writeInt(i64, meta.tstamp, std.builtin.Endian.little);\n }\n }\n\n pub fn loadKeyDir(self: *FileDB) !void {\n self.mu.lock();\n defer self.mu.unlock();\n const path = try utils.openUserDir(self.config.dir);\n\n var file = path.openFile(kd.HINTS_FILE, .{}) catch |err| {\n std.log.debug(\"Error opening hint file: {}\", .{err});\n return;\n };\n defer file.close();\n var reader = file.reader();\n const stat = try file.stat();\n if (stat.size == 0) {\n return;\n }\n\n // Read number of hashmap entries\n const entry_count = try reader.readInt(u32, std.builtin.Endian.little);\n var i: u32 = 0;\n while (i < entry_count) : (i += 1) {\n // Read key length and key\n const key_len = try reader.readInt(u32, std.builtin.Endian.little);\n const key_buf = try self.allocator.alloc(u8, key_len);\n errdefer self.allocator.free(key_buf);\n try reader.readNoEof(key_buf);\n\n // Read metadata items\n const file_id = try reader.readInt(u32, std.builtin.Endian.little);\n const value_sz = try reader.readInt(usize, std.builtin.Endian.little);\n const value_pos = try reader.readInt(usize, std.builtin.Endian.little);\n const tstamp = try reader.readInt(i64, std.builtin.Endian.little);\n\n const metadata = kd.Metadata.init(file_id, value_sz, value_pos, tstamp);\n\n try self.keydir.put(key_buf, metadata);\n }\n\n return;\n }\n};\n\nfn runCompaction(self: *FileDB) !void {\n const interval: u64 = self.config.compactionInterval * time.ns_per_s;\n while (!self.should_shutdown.load(.acquire)) {\n time.sleep(interval);\n {\n self.mu.lock();\n defer self.mu.unlock();\n self.log.info(\"Starting compaction\", .{});\n try mergeDatafiles(self);\n try self.StoreHashMap();\n self.log.info(\"Ended compaction\", .{});\n }\n }\n}\nfn runSync(self: *FileDB) !void {\n const interval: u64 = self.config.syncInterval * time.ns_per_s;\n while (!self.should_shutdown.load(.acquire)) {\n time.sleep(interval);\n {\n self.mu.lock();\n defer self.mu.unlock();\n try self.datafile.sync();\n }\n }\n}\nfn runRotation(self: *FileDB) !void {\n const interval: u64 = self.config.dfRotationInterval * time.ns_per_s;\n while (!self.should_shutdown.load(.acquire)) {\n time.sleep(interval);\n {\n self.mu.lock();\n defer self.mu.unlock();\n try rotateDf(self);\n }\n }\n}\n\nfn rotateDf(self: *FileDB) !void {\n self.log.info(\"Current Datafile Size: {}\", .{try self.datafile.size()});\n if (try self.datafile.size() < self.config.maxFileSize) {\n return;\n }\n\n self.log.info(\"Starting DF Rotation\", .{});\n const oldId = self.datafile.id;\n try self.oldfiles.filemap.put(oldId, self.datafile);\n var dir = try utils.openUserDir(self.config.dir);\n defer dir.close();\n self.datafile = try Datafile.init(self.allocator, oldId + 1, dir);\n self.log.info(\"Ended DF Rotation\", .{});\n return;\n}\nfn mergeDatafiles(self: *FileDB) !void {\n var mergeFsync = false;\n if (self.oldfiles.filemap.count() < 2) {\n return;\n }\n std.fs.cwd().makeDir(\"tmp\") catch |err| switch (err) {\n error.PathAlreadyExists => {\n self.log.debug(\"Directory already exists: {s}\\n\", .{\"tmp\"});\n },\n else => return err,\n };\n\n var tmpDirectory = try std.fs.cwd().openDir(\"tmp\", .{ .iterate = true });\n defer tmpDirectory.close();\n defer std.fs.cwd().deleteTree(\"tmp\") catch |err| {\n self.log.debug(\"Cannot Delete TempDir: {}\", .{err});\n };\n\n const mergedDf = try Datafile.init(self.allocator, 0, tmpDirectory);\n if (self.config.alwaysFsync) {\n mergeFsync = true;\n self.config.alwaysFsync = false;\n }\n\n var it = self.keydir.iterator();\n while (it.next()) |entry| {\n const keydir_record = try self.getValue(entry.key_ptr.*);\n if (keydir_record) |existing_record| {\n try self.storeKV(mergedDf, entry.key_ptr.*, existing_record);\n self.allocator.free(existing_record);\n }\n }\n\n var oldDir = try utils.openUserDir(self.config.dir);\n defer oldDir.close();\n var walker = try oldDir.walk(self.allocator);\n defer walker.deinit();\n while (try walker.next()) |entry| {\n if (entry.kind != .file) {\n continue;\n }\n if (std.mem.endsWith(u8, entry.basename, \".db\")) {\n oldDir.deleteFile(entry.path) catch |err| {\n self.log.debug(\"Failed to remove {s}: {}\\n\", .{ entry.path, err });\n continue;\n };\n }\n }\n\n const filemap = std.AutoHashMap(u32, *Datafile).init(self.allocator);\n self.oldfiles.deinit();\n self.oldfiles = try Oldfiles.init(self.allocator, filemap);\n try self.oldfiles.initializeMap(oldDir);\n\n try tmpDirectory.copyFile(\"file_0.db\", oldDir, \"file_0.db\", .{});\n self.datafile.deinit();\n self.datafile = mergedDf;\n\n if (mergeFsync) {\n try self.datafile.sync();\n self.config.alwaysFsync = true;\n }\n return;\n}\n\ntest \"filedbInitialized\" {\n var gpa = std.heap.GeneralPurposeAllocator(.{}){};\n defer if (gpa.deinit() != .ok) @panic(\"leak\");\n const allocator = gpa.allocator();\n\n var options = config.defaultOptions();\n options.dir = \"/home/rajiv/projects/filedb/test_initialize\";\n const filedb = try FileDB.init(allocator, options);\n time.sleep(10 * time.ns_per_s);\n defer filedb.deinit();\n try expect(true);\n}\n\ntest \"insert a value and get it back\" {\n var gpa = std.heap.GeneralPurposeAllocator(.{}){};\n defer if (gpa.deinit() != .ok) @panic(\"leak\");\n const allocator = gpa.allocator();\n\n var options = config.defaultOptions();\n options.dir = \"test_3\";\n const filedb = try FileDB.init(allocator, options);\n defer filedb.deinit();\n\n try filedb.put(\"key1\", \"value1\");\n\n const value = try filedb.get(\"key1\");\n\n try expect(value != null);\n defer if (value) |v| allocator.free(v);\n\n const final_value = value.?;\n std.log.debug(\"found value '{s}'\", .{final_value});\n try std.testing.expectEqualStrings(\"value1\", final_value);\n}\n\ntest \"get a value which does not exist\" {\n var gpa = std.heap.GeneralPurposeAllocator(.{}){};\n defer if (gpa.deinit() != .ok) @panic(\"leak\");\n const allocator = gpa.allocator();\n\n var options = config.defaultOptions();\n options.dir = \"test_2\";\n const filedb = try FileDB.init(allocator, options);\n defer filedb.deinit();\n\n const value = try filedb.get(\"key1\");\n\n try expect(value == null);\n}\n\ntest \"list all keys\" {\n var gpa = std.heap.GeneralPurposeAllocator(.{}){};\n defer if (gpa.deinit() != .ok) @panic(\"leak\");\n const allocator = gpa.allocator();\n\n var options = config.defaultOptions();\n options.dir = \"test_1\";\n const filedb = try FileDB.init(allocator, options);\n defer filedb.deinit();\n\n try filedb.put(\"key1\", \"value1\");\n try filedb.put(\"key2\", \"value1\");\n try filedb.put(\"key3\", \"value1\");\n try filedb.put(\"key4\", \"value1\");\n\n const keylist = try filedb.list(allocator);\n defer {\n for (keylist.items) |v| {\n allocator.free(v);\n }\n keylist.deinit();\n }\n\n try std.testing.expectEqual(4, keylist.items.len);\n}\n"], ["/filedb/src/datafile.zig", "const std = @import(\"std\");\nconst util = @import(\"utils.zig\");\nconst filename = \"file_{}.db\";\n\npub const Datafile = struct {\n reader: std.fs.File,\n writer: std.fs.File,\n mu: std.Thread.Mutex,\n id: u32,\n offset: u64,\n allocator: std.mem.Allocator,\n\n pub fn init(allocator: std.mem.Allocator, index: u32, dir: std.fs.Dir) !*Datafile {\n var file_buf: [32]u8 = undefined;\n const file_name = try std.fmt.bufPrint(&file_buf, filename, .{index});\n _ = dir.createFile(file_name, .{ .read = true, .exclusive = true }) catch |err| switch (err) {\n error.PathAlreadyExists => {\n // Open existing file\n },\n else => return err,\n };\n const file = try dir.openFile(file_name, .{ .mode = .read_write });\n\n const stat = try file.stat();\n const datafile = try allocator.create(Datafile);\n\n datafile.* = .{\n .reader = file,\n .writer = file,\n .mu = std.Thread.Mutex{},\n .id = index,\n .offset = stat.size,\n .allocator = allocator,\n };\n return datafile;\n }\n\n pub fn deinit(self: *Datafile) void {\n self.reader.close();\n\n self.allocator.destroy(self);\n }\n\n pub fn size(self: *Datafile) !u64 {\n const stat = self.writer.stat() catch |err| {\n std.log.debug(\"cannot stat file '{}': {}\", .{ self.id, err });\n\n return err;\n };\n\n return stat.size;\n }\n\n pub fn store(self: *Datafile, buf: []const u8) !u64 {\n const sz = try self.writer.write(buf);\n\n const offset = self.offset;\n self.offset += sz;\n\n return offset;\n }\n\n pub fn get(self: *Datafile, buf: []u8, value_pos: usize, value_size: usize) !void {\n try self.reader.seekTo(value_pos);\n const data = try self.reader.read(buf);\n\n if (data != value_size) {\n return ErrorMissingData.MissingData;\n }\n }\n\n pub fn sync(self: *Datafile) !void {\n try self.writer.sync();\n }\n};\n\nconst ErrorMissingData = error{MissingData};\n"], ["/filedb/src/utils.zig", "const std = @import(\"std\");\nconst Crc32 = std.hash.crc.Crc32;\n\n// list all the database files in the given directory\n// directory must be open with the iterate flag true\npub fn listAllDatabaseFiles(allocator: std.mem.Allocator, dir: std.fs.Dir) !std.ArrayList([]const u8) {\n var walker = try dir.walk(allocator);\n defer walker.deinit();\n\n var filelist = std.ArrayList([]const u8).init(allocator);\n\n while (try walker.next()) |entry| {\n if (std.mem.endsWith(u8, entry.basename, \".db\")) {\n const f = try allocator.dupe(u8, entry.basename);\n try filelist.append(f);\n }\n }\n return filelist;\n}\n\npub fn parseIdFromFilename(filename: []const u8) !u32 {\n const prefix = \"file_\";\n const suffix = \".db\";\n const start_index = prefix.len;\n const end_index = std.mem.indexOf(u8, filename, suffix) orelse filename.len;\n\n if (start_index >= end_index) {\n std.debug.print(\"Invalid format\\n\", .{});\n return error.InvalidFormat;\n }\n\n // Extract the substring containing the number\n const id_str = filename[start_index..end_index];\n\n // Convert to integer\n const id = try std.fmt.parseInt(u32, id_str, 10);\n return id;\n}\n\npub fn validateKV(key: []const u8, value: []const u8) !void {\n if (key.len == 0) {\n return ErrorKVValidation.KeyCannotBeEmpty;\n }\n\n if (key.len > MAX_KEY_LEN) {\n return ErrorKVValidation.KeyLengthExceeded;\n }\n\n if (value.len > MAX_VAL_LEN) {\n return ErrorKVValidation.ValueLengthExceeded;\n }\n}\n\npub const ErrorKVValidation = error{\n KeyCannotBeEmpty,\n KeyLengthExceeded,\n ValueLengthExceeded,\n};\n\npub fn crc32Checksum(data: []const u8) u32 {\n var crc = Crc32.init();\n crc.update(data);\n return crc.final();\n}\n\npub const MAX_KEY_LEN = 4294967296; // 2^32\npub const MAX_VAL_LEN = 4294967296; // 2^32\n\npub fn openUserDir(user_path: []const u8) !std.fs.Dir {\n if (std.fs.path.isAbsolute(user_path)) {\n // Try opening absolute path\n return std.fs.openDirAbsolute(user_path, .{ .iterate = true }) catch |err| switch (err) {\n error.FileNotFound => {\n try std.fs.makeDirAbsolute(user_path); // Create missing directory\n return std.fs.openDirAbsolute(user_path, .{ .iterate = true });\n },\n else => return err,\n };\n } else {\n // Try opening relative path from CWD\n const cwd = std.fs.cwd();\n return cwd.openDir(user_path, .{ .iterate = true }) catch |err| switch (err) {\n error.FileNotFound => {\n try cwd.makeDir(user_path);\n return cwd.openDir(user_path, .{ .iterate = true });\n },\n else => return err,\n };\n }\n}\n"], ["/filedb/src/main.zig", "const std = @import(\"std\");\nconst FileDB = @import(\"filedb.zig\").FileDB;\nconst FileDBConfig = @import(\"config.zig\");\n\npub fn main() !void {\n var gpa = std.heap.GeneralPurposeAllocator(.{}){};\n defer _ = gpa.deinit();\n const allocator = gpa.allocator();\n\n var options = FileDBConfig.defaultOptions();\n options.alwaysFsync = false;\n options.compactionInterval = 100;\n options.dfRotationInterval = 150;\n options.maxFileSize = 1000 * 1024 * 1024;\n options.log_level = std.log.Level.info;\n var filedb = try FileDB.init(allocator, options);\n defer filedb.deinit();\n\n var listener = try std.net.Address.listen(try std.net.Address.parseIp(\"0.0.0.0\", 6379), .{\n .reuse_address = true,\n });\n defer listener.deinit();\n\n filedb.log.debug(\"Listening on 0.0.0.0:6379\\n\", .{});\n\n while (true) {\n const conn = listener.accept() catch |err| {\n filedb.log.debug(\"Accept error: {}\\n\", .{err});\n continue;\n };\n\n const context = try allocator.create(ClientContext);\n context.* = ClientContext{\n .stream = conn.stream,\n .db = filedb,\n .allocator = allocator,\n };\n\n _ = try std.Thread.spawn(.{}, handleClient, .{context});\n }\n}\n\nfn readRespCommand(reader: anytype, allocator: std.mem.Allocator) ![][]const u8 {\n var buf1: [128]u8 = undefined;\n const first_line = try reader.readUntilDelimiterOrEof(&buf1, '\\n') orelse return error.EndOfStream;\n\n if (first_line.len < 1 or first_line[0] != '*') return error.InvalidCommand;\n\n const argc = try std.fmt.parseInt(usize, std.mem.trimRight(u8, first_line[1..], \"\\r\"), 10);\n var args = try allocator.alloc([]const u8, argc);\n errdefer {\n for (args[0..]) |arg| {\n allocator.free(arg);\n }\n allocator.free(args);\n }\n\n var i: usize = 0;\n while (i < argc) {\n var len_buf: [128]u8 = undefined;\n const len_line = try reader.readUntilDelimiterOrEof(&len_buf, '\\n') orelse return error.UnexpectedEof;\n\n if (len_line.len < 1 or len_line[0] != '$') return error.InvalidCommand;\n\n const len = try std.fmt.parseInt(usize, std.mem.trimRight(u8, len_line[1..], \"\\r\"), 10);\n const data = try allocator.alloc(u8, len);\n _ = try reader.readNoEof(data);\n\n var crlf: [2]u8 = undefined;\n _ = try reader.readNoEof(&crlf);\n if (!(crlf[0] == '\\r' and crlf[1] == '\\n')) return error.InvalidLineEnding;\n\n args[i] = data;\n i += 1;\n }\n\n return args;\n}\n\nconst ClientContext = struct {\n stream: std.net.Stream,\n db: *FileDB,\n allocator: std.mem.Allocator,\n};\n\nfn handleClient(context: *ClientContext) !void {\n defer {\n context.stream.close();\n context.allocator.destroy(context);\n }\n\n const reader = context.stream.reader();\n const writer = context.stream.writer();\n\n while (true) {\n context.db.log.debug(\"===> parsing next RESP command\\n\", .{});\n\n const args = readRespCommand(reader, context.allocator) catch |err| {\n switch (err) {\n error.EndOfStream => {\n context.db.log.debug(\"Client disconnected\\n\", .{});\n break;\n },\n else => {\n try writer.writeAll(\"-ERR parse error\\r\\n\");\n context.db.log.debug(\"Parse error: {}\\n\", .{err});\n continue;\n },\n }\n };\n\n defer {\n for (args) |item| {\n context.allocator.free(item);\n }\n context.allocator.free(args);\n }\n\n if (args.len == 0) continue;\n\n const cmd = std.ascii.allocUpperString(context.allocator, args[0]) catch args[0];\n defer if (cmd.ptr != args[0].ptr) context.allocator.free(cmd);\n\n if (std.mem.eql(u8, cmd, \"PING\")) {\n try writer.writeAll(\"+PONG\\r\\n\");\n } else if (std.mem.eql(u8, cmd, \"SET\") and args.len == 3) {\n try context.db.put(args[1], args[2]);\n try writer.writeAll(\"+OK\\r\\n\");\n } else if (std.mem.eql(u8, cmd, \"GET\") and args.len == 2) {\n if (try context.db.get(args[1])) |val| {\n try writer.print(\"${d}\\r\\n{s}\\r\\n\", .{ val.len, val });\n } else {\n try writer.writeAll(\"$-1\\r\\n\");\n }\n } else if (std.mem.eql(u8, cmd, \"DEL\") and args.len == 2) {\n try context.db.delete(args[1]);\n try writer.writeAll(\":1\\r\\n\");\n } else if (std.mem.eql(u8, cmd, \"CONFIG\")) {\n // Handle CONFIG commands more properly\n if (args.len >= 2 and std.mem.eql(u8, std.ascii.allocUpperString(context.allocator, args[1]) catch args[1], \"GET\")) {\n try writer.writeAll(\"*0\\r\\n\");\n } else {\n try writer.writeAll(\"*0\\r\\n\");\n }\n } else {\n try writer.writeAll(\"-ERR unknown command\\r\\n\");\n }\n }\n}\n"], ["/filedb/src/record.zig", "const std = @import(\"std\");\nconst utils = @import(\"utils.zig\");\n\npub const Record = struct {\n crc: u32,\n tstamp: i64,\n key_len: usize,\n value_len: usize,\n key: []const u8,\n value: []const u8,\n allocator: std.mem.Allocator,\n\n pub fn init(allocator: std.mem.Allocator, key: []const u8, value: []const u8) !*Record {\n const record = try allocator.create(Record); // better error handling\n const key_copy = try allocator.dupe(u8, key);\n const value_copy = try allocator.dupe(u8, value);\n record.* = .{\n .crc = utils.crc32Checksum(key),\n .tstamp = std.time.timestamp(),\n .key_len = key.len,\n .value_len = value.len,\n .key = key_copy,\n .value = value_copy,\n .allocator = allocator,\n };\n\n return record;\n }\n\n pub fn encode(self: *Record, buf: []u8) !void {\n var fbs = std.io.fixedBufferStream(buf);\n var writer = fbs.writer();\n\n try writer.writeInt(u32, self.crc, std.builtin.Endian.little);\n try writer.writeInt(i64, self.tstamp, std.builtin.Endian.little);\n try writer.writeInt(usize, self.key_len, std.builtin.Endian.little);\n try writer.writeInt(usize, self.value_len, std.builtin.Endian.little);\n try writer.writeAll(self.key);\n try writer.writeAll(self.value);\n }\n\n pub fn deinit(self: *Record) void {\n self.allocator.free(self.key);\n self.allocator.free(self.value);\n self.allocator.destroy(self);\n }\n};\n\npub fn decodeRecord(allocator: std.mem.Allocator, buf: []u8) !*Record {\n var fbs = std.io.fixedBufferStream(buf);\n var reader = fbs.reader();\n\n _ = try reader.readInt(u32, std.builtin.Endian.little);\n _ = try reader.readInt(i64, std.builtin.Endian.little);\n const key_len = try reader.readInt(usize, std.builtin.Endian.little);\n const value_len = try reader.readInt(usize, std.builtin.Endian.little);\n const key = try allocator.alloc(u8, key_len);\n defer allocator.free(key);\n _ = try reader.read(key);\n const value = try allocator.alloc(u8, value_len);\n defer allocator.free(value);\n _ = try reader.read(value);\n return Record.init(allocator, key, value);\n}\n"], ["/filedb/src/keydir.zig", "const std = @import(\"std\");\nconst Oldfiles = @import(\"oldfiles.zig\").OldFiles;\nconst utils = @import(\"utils.zig\");\n\n// hashmap of key-> file_id, value_sz, value_pos, tstamp\n\npub const HINTS_FILE = \"filedb.hints\";\n\npub const Metadata = struct {\n file_id: u32,\n value_sz: usize,\n value_pos: usize,\n tstamp: i64,\n\n pub fn init(file_id: u32, value_sz: usize, value_pos: usize, tstamp: i64) Metadata {\n return .{\n .file_id = file_id,\n .value_pos = value_pos,\n .value_sz = value_sz,\n .tstamp = tstamp,\n };\n }\n};\n"], ["/filedb/src/logger.zig", "const std = @import(\"std\");\nconst log = std.log;\n\npub const Logger = struct {\n level: log.Level,\n\n const Self = @This();\n\n pub fn init(level: log.Level) Self {\n return Self{\n .level = level,\n };\n }\n\n // Helper method to check if a log level should be printed\n fn shouldLog(self: *const Self, level: log.Level) bool {\n return @intFromEnum(level) <= @intFromEnum(self.level);\n }\n\n // Custom logging methods\n pub fn info(self: *const Self, comptime format: []const u8, args: anytype) void {\n if (self.shouldLog(.info)) {\n log.info(format, args);\n }\n }\n\n pub fn debug(self: *const Self, comptime format: []const u8, args: anytype) void {\n if (self.shouldLog(.debug)) {\n log.debug(format, args);\n }\n }\n\n pub fn warn(self: *const Self, comptime format: []const u8, args: anytype) void {\n if (self.shouldLog(.warn)) {\n log.warn(format, args);\n }\n }\n\n pub fn err(self: *const Self, comptime format: []const u8, args: anytype) void {\n if (self.shouldLog(.err)) {\n log.err(format, args);\n }\n }\n};\n"], ["/filedb/src/config.zig", "const std = @import(\"std\");\nconst log = std.log;\n\npub const Options = struct {\n dir: []const u8,\n alwaysFsync: bool,\n log_level: log.Level,\n maxFileSize: u32,\n compactionInterval: u64, // in seconds\n dfRotationInterval: u64,\n syncInterval: u64,\n};\n\npub fn defaultOptions() Options {\n return .{\n .dir = \"/home/rajiv/projects/filedb/filedb\",\n .alwaysFsync = false,\n .log_level = log.Level.info,\n .maxFileSize = 10 * 1024 * 1024, //10mb\n .compactionInterval = 10,\n .dfRotationInterval = 15,\n .syncInterval = 15,\n };\n}\n"]], "task_instance_info": {"created_time": "2025-08-21 03:44:58", "created_task_model": "DeepSeek-R1", "function_skeleton": "const OldFiles = struct {\n filemap: std.AutoHashMap(u32, *Datafile),\n allocator: std.mem.Allocator,\n // path: []const u8,\n\n pub fn init(allocator: std.mem.Allocator, filemap: std.AutoHashMap(u32, *Datafile)) !*OldFiles {\n const oldfiles = try allocator.create(OldFiles);\n oldfiles.* = .{ .filemap = filemap, .allocator = allocator };\n return oldfiles;\n }\n\n pub fn initializeMap(self: *OldFiles, dir: std.fs.Dir) !void {\n const filelist = try utils.listAllDatabaseFiles(self.allocator, dir);\n for (filelist.items) |entry| {\n std.debug.print(\"Found file: {s}\", .{entry});\n const file_id = try utils.parseIdFromFilename(entry);\n const df = try Datafile.init(self.allocator, file_id, dir);\n try self.filemap.put(file_id, df);\n }\n for (filelist.items) |entry| {\n self.allocator.free(entry);\n }\n filelist.deinit();\n }\n\n pub fn deinit(self: *OldFiles) void {\n var keydirIterator = self.filemap.iterator();\n while (keydirIterator.next()) |entry| {\n entry.value_ptr.*.deinit();\n }\n self.filemap.deinit();\n self.allocator.destroy(self);\n }\n\n pub fn get(self: OldFiles, buf: []u8, file_id: u32, value_pos: usize, value_size: usize) !void {\n const df = self.filemap.get(file_id);\n if (df == null) {\n return error.EmptyDatafile;\n }\n\n return df.?.get(buf, value_pos, value_size);\n }\n}; { }", "code_description": "This code segment functions to: Manage the lifecycle of stored data resources by initializing from directory contents, maintaining lookup references, providing controlled access to stored values, and handling memory cleanup operations."}, "inference_content": {"inference_model": "DeepSeek-R1", "inference_result": "```zig\n[TASK_BEGIN]\n pub fn get(self: OldFiles, buf: []u8, file_id: u32, value_pos: usize, value_size: usize) !void {\n const df = self.filemap.get(file_id) orelse return ErrorMissingData.MissingData;\n return df.get(buf, value_pos, value_size);\n }\n[TASK_END]\n```", "inference_time": "2025-08-21 03-45-21"}, "editdistance_info": {"edit_distance": 15.2, "calculate_time": "2025-08-21 03:45:21", "true_code_clean": "const OldFiles = struct {\n filemap: std.AutoHashMap(u32, *Datafile),\n allocator: std.mem.Allocator,\n pub fn init(allocator: std.mem.Allocator, filemap: std.AutoHashMap(u32, *Datafile)) !*OldFiles {\n const oldfiles = try allocator.create(OldFiles);\n oldfiles.* = .{ .filemap = filemap, .allocator = allocator };\n return oldfiles;\n }\n pub fn initializeMap(self: *OldFiles, dir: std.fs.Dir) !void {\n const filelist = try utils.listAllDatabaseFiles(self.allocator, dir);\n for (filelist.items) |entry| {\n std.debug.print(\"Found file: {s}\", .{entry});\n const file_id = try utils.parseIdFromFilename(entry);\n const df = try Datafile.init(self.allocator, file_id, dir);\n try self.filemap.put(file_id, df);\n }\n for (filelist.items) |entry| {\n self.allocator.free(entry);\n }\n filelist.deinit();\n }\n pub fn deinit(self: *OldFiles) void {\n var keydirIterator = self.filemap.iterator();\n while (keydirIterator.next()) |entry| {\n entry.value_ptr.*.deinit();\n }\n self.filemap.deinit();\n self.allocator.destroy(self);\n }\n pub fn get(self: OldFiles, buf: []u8, file_id: u32, value_pos: usize, value_size: usize) !void {\n const df = self.filemap.get(file_id);\n if (df == null) {\n return error.EmptyDatafile;\n }\n return df.?.get(buf, value_pos, value_size);\n }\n};", "predict_code_clean": "pub fn get(self: OldFiles, buf: []u8, file_id: u32, value_pos: usize, value_size: usize) !void {\n const df = self.filemap.get(file_id) orelse return ErrorMissingData.MissingData;\n return df.get(buf, value_pos, value_size);\n }"}}
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