commit f1f1743ddb7b6a5a6d5ed4e608b7cfccca287e55
Author: niansa <niansa@lyllia>
Date:   Thu Apr 9 23:44:06 2020 +0200

    Initial commit

diff --git a/__pycache__/errors.cpython-37.pyc b/__pycache__/errors.cpython-37.pyc
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diff --git a/__pycache__/intern.cpython-37.pyc b/__pycache__/intern.cpython-37.pyc
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index 0000000..eec237f
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diff --git a/__pycache__/rstrings.cpython-37.pyc b/__pycache__/rstrings.cpython-37.pyc
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diff --git a/__pycache__/rtypes.cpython-37.pyc b/__pycache__/rtypes.cpython-37.pyc
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index 0000000..570dfdc
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diff --git a/cli.py b/cli.py
new file mode 100755
index 0000000..ba05b9a
--- /dev/null
+++ b/cli.py
@@ -0,0 +1,25 @@
+#! /usr/bin/env python3
+import sys
+from intern import main_class
+
+if len(sys.argv) == 1: # CLI loop
+    main = main_class()
+    while True:
+        print(">>> ", end="", flush=True)
+        commandstr = input()
+        res = main.get_rstring(main.run_command(commandstr), errorsonly=False)
+        if res != None:
+            print(res)
+else:                  # File execution loop
+    main = main_class()
+    if sys.argv[1] == "-c":
+        del sys.argv[1]
+        if len(sys.argv[1]) == 1:
+            sys.exit(1)
+    with open(sys.argv[1], mode="r") as f:
+        for line in f:
+            if line[-1] == "\n":
+                line = line[:-1]
+            cmdres = main.get_rstring(main.run_command(line), errorsonly=True)
+            if cmdres:
+                print(cmdres)
diff --git a/errors.py b/errors.py
new file mode 100644
index 0000000..bef5d08
--- /dev/null
+++ b/errors.py
@@ -0,0 +1,4 @@
+class nochsuchcmd:      pass
+class badarguments:     pass
+class nosuchmodule:     pass
+class nosuchvariable:   pass
diff --git a/intern.py b/intern.py
new file mode 100644
index 0000000..df74cb6
--- /dev/null
+++ b/intern.py
@@ -0,0 +1,127 @@
+import sys, os
+from types import ModuleType
+import errors
+import rtypes
+from rstrings import rstrings
+
+
+class environment_class:
+    def __init__(self):
+        self.variables = {}
+        self.catch = False
+environment = environment_class()
+
+class main_class:
+    def __init__(self):
+        self.modules = {}
+        self.commands = {}
+        environment.evaluate = self.run_command
+        # Load and import modules
+        for module in os.listdir("modules"):
+            if module[-3:] == ".py" or module[-4:] == ".pyc":
+                self.import_module(f"modules/{module}")
+    
+    def is_error(self, robj):
+        try:
+            return robj.__name__ in errors.__dict__.keys()
+        except AttributeError:
+            return False
+    
+    def get_rstring(self, robj, errorsonly=True):
+        iserr = False
+        try:
+            if not "errorsonly" in self.__dict__.keys():
+                self.errorsonly = errorsonly
+            if isinstance(robj,type):
+                if self.is_error(robj):
+                    iserr = True
+                if self.errorsonly and not self.is_error(robj):
+                    return None
+                try:
+                    return rstrings[robj.__name__]
+                except KeyError:
+                    return "py." + robj.__name__
+            else:
+                return robj
+        finally:
+            if environment.catch and iserr:
+                environment.catch = False
+                print("An exception was catched:", self.get_rstring(robj))
+                sys.exit(1)
+    
+    def import_module(self, path):
+        with open(path) as file:
+            modcode = file.read()
+        mod = ModuleType(path)
+        exec(modcode, mod.__dict__)
+        return mod.adder(self.add_module)
+    
+    def add_module(self, module_class):
+        modulename = module_class.__name__
+        self.modules[modulename] = module_class(environment)
+        for command in self.modules[modulename].commands:
+            self.commands[command] = self.modules[modulename]
+    
+    def run_command(self, commandstr):
+        try: commandstr, _ = commandstr.split("#", 1) # Split off comments
+        except ValueError: pass
+        commandstr = commandstr.lstrip()
+        if commandstr == "":             # Empty command (does nothing)
+            return
+        elif commandstr.startswith("~"): # Variable
+            try:
+                return environment.variables[commandstr[1:]]
+            except KeyError:
+                return errors.nosuchvariable
+        else:                          # Actual command
+            try: command, argsstr = commandstr.split(" ", 1)
+            except ValueError: command, argsstr = (commandstr, "")
+            try: commandsplit = command.split(".", 1)
+            except ValueError: commandsplit = [command]
+            # Get module to parse command
+            if len(commandsplit) == 1: # Non-exact command
+                try:
+                    module = self.commands[command]
+                except KeyError:
+                    return errors.nochsuchcmd
+            else:                      # Exact command
+                try:
+                    module = self.modules[commandsplit[0]]
+                except KeyError:
+                    return errors.nosuchmodule
+                command = commandsplit[1]
+                if not command in self.commands.keys():
+                    return errors.nochsuchcmd
+            # Split arguments if required
+            argsstr += ","
+            args = []
+            if argsstr != ",":
+                currarg = ""
+                instring = False
+                arginstring = False
+                charig = False
+                skipall = False
+                for char in argsstr:
+                    if skipall:
+                        continue
+                    elif char == '"' and not charig:
+                        instring = not instring
+                        if currarg == "":
+                            arginstring = True
+                    elif char == "#" and  not charig and not instring:
+                        skipall = True
+                    elif char == ',' and not charig and not instring:
+                        if len(currarg) != 0 and currarg[0] == "$" and not arginstring:
+                            currarg = self.get_rstring(self.run_command(currarg[1:]))
+                        args.append(currarg)
+                        currarg = ""
+                        arginstring = False
+                    elif char == "\\" and not charig:
+                        charig = True
+                    else:
+                        currarg += char
+                        charig = False
+            else:
+                pass
+            # Run command
+            return module.processor(command, args)
diff --git a/modules/__pycache__/builtin.cpython-37.pyc b/modules/__pycache__/builtin.cpython-37.pyc
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index 0000000..6ea14af
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diff --git a/modules/builtin.py b/modules/builtin.py
new file mode 100644
index 0000000..76ab4ad
--- /dev/null
+++ b/modules/builtin.py
@@ -0,0 +1,122 @@
+import sys
+import errors
+import rtypes
+
+
+class builtin:
+    def __init__(self, environ):
+        self.commands = {
+            "ret": self.cmd_ret,
+            "catch": self.cmd_catch,
+            "exit": self.cmd_exit,
+            "print": self.cmd_print,
+            "input": self.cmd_input,
+            "set": self.cmd_set,
+            "del": self.cmd_del,
+            "eval": self.cmd_eval,
+            "cmp": self.cmd_cmp,
+            "lower": self.cmd_lower
+            }
+        self.environ = environ
+    
+    def processor(self, command, args):
+        try:
+            return self.commands[command](args)
+        except KeyError:
+            return errors.nochsuchcmd
+    
+    def cmd_ret(self, args):
+        return " ".join(args)
+    
+    def cmd_catch(self, args):
+        if args == []:
+            self.environ.catch = not self.environ.catch
+        else:
+            if args[0].lower() == "true":
+                self.environ.catch = True
+            elif args[0].lower() == "false":
+                self.environ.catch = False
+            else:
+                return errors.badarguments
+    
+    def cmd_exit(self, args):
+        try:
+            sys.exit(int(args[0]))
+        except ValueError:
+            return errors.badarguments
+        except IndexError:
+            return errors.badarguments
+    
+    def cmd_print(self, args, nonline=False):
+        for arg in args:
+            print(arg, end="")
+        if not nonline:
+            print()
+        return rtypes.success
+    
+    def cmd_input(self, args):
+        self.cmd_print(args, nonline=True)
+        return input()
+    
+    def cmd_set(self, args):
+        if len(args) != 2:
+            return errors.badarguments
+        self.environ.variables[args[0]] = args[1]
+        return rtypes.success
+    
+    def cmd_del(self, args):
+        # Check if variable exists
+        for arg in args:
+            if not arg in self.environ.variables.keys():
+                return errors.nosuchvariable
+        # Actually do that stuff
+        for arg in args:
+            del self.environ.variables[arg]
+        return rtypes.success
+    
+    def cmd_lower(self, args):
+        return str(args[0].lower())
+    
+    def cmd_cmp(self, args):
+        # Check
+        try:
+            action, var1, var2, *commands = args
+            if action == "equal":
+                matches = str(var1) == str(var2)
+            elif action == "nonequal":
+                matches = str(var1) != str(var2)
+            elif action == "bigger":
+                matches = float(var1) > float(var2)
+            elif action == "smaller":
+                matches = float(var1) < float(var2)
+            elif action in ["isnum", "isnotnum"]:
+                try:
+                    float(var1)
+                    float(var2)
+                    matches = True
+                except ValueError:
+                    matches = False
+                if action == "isnotnum":
+                    matches = not matches
+            else:
+                return errors.badarguments
+            if commands == []:
+                return matches
+        except ValueError:
+            return errors.badarguments
+        # Evaluate list of commands
+        if matches:
+            for command in commands:
+                lastres = self.environ.evaluate(command)
+            return lastres
+        else:
+            return rtypes.fail
+    
+    def cmd_eval(self, args):
+        for command in args:
+            lastres = self.environ.evaluate(command)
+        return lastres
+
+
+def adder(registerer):
+    registerer(builtin)
diff --git a/modules/math.py b/modules/math.py
new file mode 100644
index 0000000..186a033
--- /dev/null
+++ b/modules/math.py
@@ -0,0 +1,81 @@
+import errors
+import rtypes
+
+
+class math:
+    def __init__(self, environ):
+        self.commands = {
+            "add": self.cmd_add,
+            "sub": self.cmd_sub,
+            "mul": self.cmd_mul,
+            "div": self.cmd_div
+            }
+
+    def processor(self, command, args):
+        try:
+            return self.commands[command](args)
+        except KeyError:
+            return errors.nochsuchcmd
+
+    def cmd_add(self, args):
+        try:
+            if args[0] == "asint":
+                asint = True
+                args = args[1:]
+            else:
+                asint = False
+            result = 0
+            for arg in args:
+                result += float(arg)
+            if asint: result = int(result)
+            return result
+        except ValueError:
+            return errors.badarguments
+    
+    def cmd_sub(self, args):
+        try:
+            if args[0] == "asint":
+                asint = True
+                args = args[1:]
+            else:
+                asint = False
+            result = float(args[0])
+            for arg in args[1:]:
+                result -= float(arg)
+            if asint: result = int(result)
+            return result
+        except ValueError:
+            return errors.badarguments
+    
+    def cmd_mul(self, args):
+        try:
+            if args[0] == "asint":
+                asint = True
+                args = args[1:]
+            else:
+                asint = False
+            result = 1
+            for arg in args:
+                result *= float(arg)
+            if asint: result = int(result)
+            return result
+        except ValueError:
+            return errors.badarguments
+    
+    def cmd_div(self, args):
+        try:
+            if args[0] == "asint":
+                asint = True
+                args = args[1:]
+            else:
+                asint = False
+            result = float(args[0])
+            for arg in args[1:]:
+                result /= float(arg)
+            if asint: result = int(result)
+            return result
+        except ValueError:
+            return errors.badarguments
+
+def adder(registerer):
+    registerer(math)
diff --git a/rstrings.py b/rstrings.py
new file mode 100644
index 0000000..2ffdcca
--- /dev/null
+++ b/rstrings.py
@@ -0,0 +1,8 @@
+rstrings = {
+    "success": "Success",
+    "fail": "Failed",
+    "nochsuchcmd": "No such command",
+    "nosuchmodule": "No such module",
+    "nosuchvariable": "No such variable",
+    "badarguments": "Bad arguments"
+        }
diff --git a/rtypes.py b/rtypes.py
new file mode 100644
index 0000000..63de9a2
--- /dev/null
+++ b/rtypes.py
@@ -0,0 +1,2 @@
+class success: pass
+class fail:    pass
diff --git a/test.pil b/test.pil
new file mode 100644
index 0000000..c256a5a
--- /dev/null
+++ b/test.pil
@@ -0,0 +1,16 @@
+# Enable error catching
+catch True
+# Initialise stuff
+set wasword,was
+# Get input from user
+set errnonum,Whatever you typed in... It's definitely not a number!!!
+set name,$input "Name: "
+cmp equal,$~name,,"print What? That person has no name???",exit 1
+set current year,$input "Current year: "
+cmp isnotnum,$~current year,0,print $~errnonum,exit 2
+set birth year,$input "Year of birth: "
+cmp isnotnum,$~birth year,0,print $~errnonum,exit 3
+# Check if birth year is before current year
+cmp smaller,$~current year,$~birth year,"print Will ,$~name, be born in the future?","set yesno,$input Yes/No?: ","cmp equal,$lower $~yesno,no,exit 4","cmp nonequal,$lower $~yesno,yes,print I give you up... Bye!,exit 4","set wasword,will be"
+# Print result
+print $~name, ,$~wasword, born in ,$~current year,",", so I guess he is ,$"sub asint,$~current year,$~birth year", Years old!