Thread-based TCP sockets

athena.mlb

@@ -5,6 +5,7 @@ local
 	$(SML_LIB)/mlyacc-lib/mlyacc-lib.mlb
         $(SML_LIB)/cml/cml.mlb
         $(SML_LIB)/basis/mlton.mlb	
+	$(SML_LIB)/smlnj-lib/INet/inet-lib.mlb
 in
 	compat_11072.sml
 	base.sig
@@ -86,11 +87,12 @@ in
 	topenv_part1.sml
 	topenv_part2.sml
 	definition_processor.sml
-	(**
-	prolog_solver.sml
-	**)
 	repl.sml
-	athena.sml
+	mlton_server.sml
 	sml_c_util.sml
+(***
+	xsb_prolog_solver.sml
+***)
+	athena.sml
 	mlton_main.sml
 end

athena.sml

@@ -65,5 +65,5 @@ fun main(arg0,args) =
      | [file_name] => M(SOME(file_name),false)
      | file_name::(_::_) => M(SOME(file_name),true))
    end
-   
+
 end 

base.sml

@@ -610,7 +610,7 @@ fun repeat n f =
 val (newline,lparen,rparen,lbrack,rbrack,lbrace,rbrace,
      blank,comma,period,colon,semi_colon,string_quote) = ("\n","(",")","[","]","{","}"," ",",",".",":",";","\"")
 
-fun mark(s) = (print("\n");repeat 3 (fn _ => print(s));print("\n"))
+fun mark(s) = (print("\n");repeat 10 (fn _ => print(s));print("\n"))
 
 fun failLst(messages) = raise FailLst messages
 

client.py

@@ -0,0 +1,111 @@
+import sys
+import socket
+import sys
+import json
+from utils import *
+
+def extract_response(sock):
+    chunks = []
+    while True:
+        chunk = sock.recv(40960)
+        if not chunk:  # Connection closed by server
+            break
+        chunks.append(chunk)
+    return b''.join(chunks).decode('utf-8')
+
+
+# Note: send_request_to_server_simple should only be used if the corresponding server uses readAllSimple.
+
+def send_request_to_server_simple(request: str, port=10000) -> str:
+    server_address = 'localhost'
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
+        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        sock.settimeout(4)  # Set a 5-second timeout for demonstration
+        try:
+            sock.connect((server_address, port))
+            sock.sendall(request.encode('utf-8'))
+            sock.sendall(''.encode('utf-8'))
+            sock.shutdown(socket.SHUT_WR)
+            return extract_response(sock)
+        except socket.timeout:
+            print("Connection timed out.")
+            return ""
+        except Exception as e:
+            print(f"An error occurred: {e}")
+            return ""
+
+# The default implementation of send_request_to_server encodes the size of the 
+# Athena payload into the first 4 bytes of the request (thus allowing payloads up to 4GB). 
+# This must be used in conjunction with readAll on the server side, which first extracts
+# the leading 4 bytes of the client's request, transforms those into the integer value N 
+# they represent, and then reads exactly N bytes from the connection. 
+
+def send_request_to_server(request: str, port=10000) -> str:
+    server_address = 'localhost'
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
+        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        sock.settimeout(4)
+        try:
+            sock.connect((server_address, port))
+            # Send length as 4-byte integer first
+            request_bytes = request.encode('utf-8')
+            length = len(request_bytes)
+            sock.sendall(length.to_bytes(4, byteorder='big'))
+            sock.sendall(request_bytes)
+            sock.shutdown(socket.SHUT_WR)
+            return extract_response(sock)
+        except socket.timeout:
+            print("Connection timed out.")
+            return ""
+        except Exception as e:
+            print(f"An error occurred: {e}")
+            return ""
+
+def spaces(i):
+    if i < 1:
+        return ""
+    else:
+        return " " + spaces(i-1)
+
+def checkProof(line):
+#
+# This function takes a string representing a line from a .jsonl file like gpt_and_english_proofs_230.jsonl 
+# and checks whether or not the formal proof that can be found in that line is valid. If it is, it returns
+# a pair of the form (True,<theorem>), where the string <theorem> is a formula representing the conclusion of the proof.
+# If the proof is not valid, then the result is a pair of the form (False,<error message>), where the string <error message>
+# provides more detail on where exactly the proof went wrong, and what exactly was wrong (a syntax error, a logic error, and if
+# so, the type of error, etc.). 
+#
+    D = json.loads(line)
+    premises = D['premises']
+    goal = D['goal']
+    assumes = '\n'.join([spaces(index) + "assume premise-" + str(index+1) + " := " + premises[index] for index in range(len(premises))])
+    proof = assumes + "\nconclude " + goal + "\n" + D['ndlProof']
+    athena_response = send_request_to_server(proof)
+    athena_response_lower = athena_response.lower() 
+    if 'error' in athena_response_lower or 'failed' in athena_response_lower: 
+        return (False,athena_response)
+    else:
+        return (True,athena_response)
+
+def checkAll(file):
+#
+# This function works with an entire jsonl file like gpt_and_english_proofs_230.jsonl. It basically
+# iterates the single-line function checkProof over all the contents of the jsonl file. The result
+# is a list of pairs (boolean_flag,<details>), as produced by checkProof, one for each line in the jsonl file.
+#
+    L = getLines(file)
+    R = []
+    send_request_to_server('declare A, B, C, D, E, F, G, H, J, I, K: Boolean')
+    for i in range(len(L)):
+        print("About to work on proof #" + str(i))
+        response = checkProof(L[i])        
+        R.append(response)
+    return R
+
+# Example use (where file is a path like "../data/gpt_generated_athena_and_english_proofs_raw_data_230.ath"):
+# R = checkAll(file) 
+# This will give all successful/valid proofs: 
+# T = [r for r in R if r[0]]
+# And this will give all incorrect proofs:
+# F = [r for r in R if not(r[0])]

make_athena_binary_for_linux

@@ -0,0 +1 @@
+mlton @MLton gc-summary -- -output athena -verbose 1 -default-ann 'allowFFI true' -drop-pass deepFlatten -codegen native athena.mlb

make_athena_binary_for_mac

@@ -0,0 +1 @@
+mlton @MLton gc-summary -- -output athena -verbose 1 -default-ann 'allowFFI true' -drop-pass deepFlatten athena.mlb

mlton_main.sml

@@ -1 +1,55 @@
-val _ = Athena.main("",CommandLine.arguments())
+(*============================================================================================================
+
+Assuming that the executable produced by running make_athena_binary_for_linux or make_athena_binary_for_mac 
+is named "athena", you can run the system in a number of ways: 
+
+./athena                                -> Start the Athena REPL
+./athena foo.ath                        -> Load foo.ath first and then start the Athena REPL
+./athena foo.ath quit          	        -> Load foo.ath and then quit 
+./athena -port <number>                 -> Start an Athena TCP server running on port <number>
+./athena -port <number> -file foo.ath   -> Load foo.ath first and then start an Athena TCP server on port <number>
+
+============================================================================================================*)
+
+
+fun mlton_main(arg0,args) = 
+  let fun M(file_name_option:string option,quit_after) =              
+             (print("\nWelcome to Athena!\n");
+              print("\nType an expression or deduction at the\nprompt below, ");
+              print("and press Enter to evaluate it.\n");
+	          print("\nTo exit Athena, type \"quit\" at the prompt\nand press Enter.\n");
+              if quit_after then
+                 Athena.runWithStarterFileAndQuit(file_name_option)
+	      else 		  
+                 Athena.runWithStarterFile(file_name_option);
+	      OS.Process.success) 
+(**      
+      val i = initializeXSB()
+**)
+  in
+    (case args of
+       [] => M(NONE,false)
+     | [file_name] => M(SOME(file_name),false)
+     | [arg_1,arg_2] => if arg_1 = "-port" orelse arg_1 = "--port" then
+                           let val port_num_opt = Int.fromString(arg_2)
+                           in
+                              (case port_num_opt of 
+                                  SOME(port_num) => (Thread.spawn(fn () => AthenaServer.startServer(port_num,NONE)); Thread.run(); OS.Process.success)
+                                | _ => (print("\nInvalid port number."); OS.Process.failure))
+                           end 
+                        else M(SOME(arg_1),true)          
+     | [arg_1,arg_2,arg_3,arg_4] =>  
+                       if (arg_1 = "-port" orelse arg_1 = "--port") andalso (arg_3 = "--file" orelse arg_3 = "-file") then
+                             let val port_num_opt = Int.fromString(arg_2)
+                                 val starter_file = arg_4
+                             in
+                                (case port_num_opt of 
+                                    SOME(port_num) => (Thread.spawn(fn () => AthenaServer.startServer(port_num,SOME(starter_file))); Thread.run(); OS.Process.success)
+                                  | _ => (print("\nInvalid port number."); OS.Process.failure))
+                             end
+                       else 
+                             M(SOME(arg_1),true)
+     | file_name::(_::_) => M(SOME(file_name),true))
+   end
+
+val _ = mlton_main("",CommandLine.arguments())

repl.sml

@@ -39,23 +39,6 @@ fun printLoadedFiles(loaded_files : (string,bool) HashTable.hash_table) =
   end
 
 fun debugPrint(_) = ()
-
-fun exceptionToString(e) =
- let fun f(ErrorMsg.ParseError((l,p),str)) = ("\n"^A.posToString({line=l,file=(!Paths.current_file),pos=p})^": Parsing error, "^str^".\n")
-       | f(A.LexError(str,SOME(pos))) = ("\n"^A.posToString(pos)^": Lexical error, "^str^".\n")
-       | f(A.LexError(str,NONE)) = ((!Paths.current_file)^": Lexical error at end of file, "^str^".\n")
-       | f(A.SyntaxError(str,SOME(pos))) = ("\n"^(A.posToString pos)^": Syntax error: "^str^".\n")
-       | f(A.SyntaxError(str,NONE)) = ("\n"^(!Paths.current_file)^": Syntax error: "^str^".\n")
-       | f(Semantics.AthenaError(msg)) = ("\n"^msg^"\n")
-       | f(Semantics.EvalError(x)) = Semantics.makeErrorWithPosInfo(x)
-       | f(Data.GenEx(str)) = str^"\n"
-       | f(SemanticValues.GenEx(x as (msg,pos_opt))) = Semantics.makeErrorWithPosInfo(x)
-       | f(Basic.Fail(str)) = "\n"^str^"\n"
-       | f(Basic.FailLst(strings)) = "\n"^(Basic.printListStr(strings,fn x => x, "\n"))^"\n" 
-       | f(_) = "\nUnknown error: "^(exnMessage e)
- in
-   f e
- end
 
 fun showFreeIds(phr,mod_path) = 
  let val (new_phrase,vars,fids) = preProcessPhrase(phr,mod_path)
@@ -140,7 +123,7 @@ in
                                         print(Semantics.summarizeTopCallStack()))
                                      end
      | TopEnv.Halt => ()     
-     | _ => print(exceptionToString(e)))
+     | _ => print(Semantics.exceptionToString(e)))
 end
 
 fun pathToString(path) = if null(path) then "[]" else Basic.printListStr(path,Symbol.name,".")
@@ -337,7 +320,7 @@ and processModuleExtension(module:A.module_entry as {module_name,module_contents
                        val _ = returned_env := SV.valEnv({val_map=val_map1',mod_map=Symbol.enter(mod_map1,mod_sym,new_module)})
                    in
                       eval_env := SV.valEnv({val_map=val_map2,mod_map=Symbol.enter(mod_map2,mod_sym,new_module)})
-                   end handle ex => (error_msg := exceptionToString(ex);
+                   end handle ex => (error_msg := Semantics.exceptionToString(ex);
                                      Paths.open_mod_paths := starting_open_mod_paths_val;
                                      Paths.open_mod_directives := starting_open_mod_directives_val;
                                      eval_env := starting_eval_env;
@@ -408,7 +391,7 @@ and processModule(module:A.module_entry as {module_name,module_contents,module_f
 				 else ()
                     in
                        ()
-                    end) handle ex => (error_msg := exceptionToString(ex);
+                    end) handle ex => (error_msg := Semantics.exceptionToString(ex);
                                        Paths.open_mod_paths := starting_open_mod_paths_val;
 				       Paths.open_mod_directives := starting_open_mod_directives_val;
                                        eval_env := starting_eval_env;
@@ -795,7 +778,7 @@ fun getInputAndProcess() =
                                   ((Parse.parse_from_stream istream),true,"") 
                                       handle e => let val _ = Parse.setLinePos(1,0)
                                                   in
-                                                    ([],false,exceptionToString(e))
+                                                    ([],false,Semantics.exceptionToString(e))
                                                   end
                      in
                        if ok_input then
@@ -830,6 +813,7 @@ fun escape(str) =
      loop(L,[])
   end
 
+(**** qqq PROCESSSTRING DEFINITION ****)
 fun processString(cmd,mod_path,env,eval_env) =
     let val stream = TextIO.openString (cmd)
         val inputs  = Parse.parse_from_stream(stream)
@@ -840,6 +824,13 @@ fun processString(cmd,mod_path,env,eval_env) =
 
 val _ = (Semantics.processString := processString)
 
+fun processAlreadyParsedInputs(inputs,mod_path,env,eval_env) =
+        let val _ = List.app (fn i => (processInput(i,mod_path,env, Semantics.top_val_env, N.top_level_name,top_loaded_files_ht))) inputs
+    in () 
+    end
+
+val _ = (Semantics.processAlreadParsedInputsRef := processAlreadyParsedInputs)
+
 fun makeLibFileName(home,fname) = List.foldl (fn (dir, path) => Paths.makePath(path, dir)) home ["lib", "basic", fname]
 
 val (athena_home_option,athena_home) = (Paths.athena_home_option,Paths.athena_home)

semantics.sml

@@ -34,6 +34,8 @@ val evaluateStringFlexible:((string * value_environment ref) -> value) ref = ref
 
 val processString:((string * (Symbol.symbol list) * value_environment ref * value_environment ref) -> unit) ref = ref (fn _ => ())
 
+val processAlreadParsedInputsRef :((A.user_input list * (Symbol.symbol list) * value_environment ref * value_environment ref) -> unit) ref = ref (fn _ => ())
+
 val (ABaseInsert,ABaseAugment) = (ABase.insert,ABase.augment)
 
 fun putValIntoAB(propVal(P),ab) = ABase.insert(P,ab)
@@ -2203,6 +2205,23 @@ fun liftArg(arg_val,expected_arity,pos_opt) =
             end
          else evError(wrongArgKindExpectationOnly(termLCType,arg_val),pos_opt)
      | _ => evError(wrongArgKindExpectationOnly(termLCType,arg_val),pos_opt))
+
+fun exceptionToString(e) =
+ let fun f(ErrorMsg.ParseError((l,p),str)) = ("\n"^A.posToString({line=l,file=(!Paths.current_file),pos=p})^": Parsing error, "^str^".\n")
+       | f(A.LexError(str,SOME(pos))) = ("\n"^A.posToString(pos)^": Lexical error, "^str^".\n")
+       | f(A.LexError(str,NONE)) = ((!Paths.current_file)^": Lexical error at end of file, "^str^".\n")
+       | f(A.SyntaxError(str,SOME(pos))) = ("\n"^(A.posToString pos)^": Syntax error: "^str^".\n")
+       | f(A.SyntaxError(str,NONE)) = ("\n"^(!Paths.current_file)^": Syntax error: "^str^".\n")
+       | f(AthenaError(msg)) = ("\n"^msg^"\n")
+       | f(EvalError(x)) = makeErrorWithPosInfo(x)
+       | f(Data.GenEx(str)) = str^"\n"
+       | f(GenEx(x as (msg,pos_opt))) = makeErrorWithPosInfo(x)
+       | f(Basic.Fail(str)) = "\n"^str^"\n"
+       | f(Basic.FailLst(strings)) = "\n"^(Basic.printListStr(strings,fn x => x, "\n"))^"\n" 
+       | f(_) = "\nUnknown error: "^(exnMessage e)
+ in
+   f e
+ end
 
 val (lp,rp,space) = ("(",")"," ")
 

server.sml

@@ -2,6 +2,9 @@
 
 A function (Server.makeServerFun) that creates an Athena TCP server, which
 can be hit by any TCP client (written in any language), local or remote. 
+Note: This is a single-threaded server and its use is not recommended.
+For a robust Athena server, use MLton to generate an executable and then
+start a TCP server on the desired port as described in mlton_main.sml.
 
 =======================================================================*)
 
@@ -25,7 +28,7 @@ fun makeServerFun([termVal(t),cv],env,ab) =
                                                               ".\nThe procedure must take a string and return a string."))
                                          end   
                 fun runServerFun([termVal(pt)],env,ab) = 
-                      let val serverFun = Socket.makeServer(input_buffer_size,processString) 
+                      let val serverFun = SocketImp.makeServer(input_buffer_size,processString) 
                           val port = (case AthTerm.getNumVal(pt) of
                                          SOME(A.int_num(p,_),_) => p
                                        | _ => primError("A port number (numeral) was expected here"))
@@ -44,4 +47,4 @@ fun makeServerFun([termVal(t),cv],env,ab) =
  | makeServerFun(vals,env,ab) = 
       primError(wrongArgNumber(N.makeServerFun_name,length(vals),2))
 
-end
+end

sockets.sml

@@ -6,7 +6,7 @@ to implement an Athena server that can be hit by arbitrary TCP clients
 
 =======================================================================*)
 
-structure Socket = struct
+structure SocketImp = struct
 
 open TextIO