Lichen

Annotated generator.py

975:94d0d415b722 1069:d06236404ecd
1032:7b9b59b4501f
974:1fde2e291f5f
5 months ago Paul Boddie file changeset files shortlog Merged changes from the default branch. trailing-data
paul@126 1 
#!/usr/bin/env python
paul@126 2 
 
 paul@126      3 
"""
 
 paul@126      4 
Generate C code from object layouts and other deduced information.
 
 paul@126      5 
 
 paul@934      6 
Copyright (C) 2015-2019, 2021 Paul Boddie <paul@boddie.org.uk>
 
 paul@126      7 
 
 paul@126      8 
This program is free software; you can redistribute it and/or modify it under
 
 paul@126      9 
the terms of the GNU General Public License as published by the Free Software
 
 paul@126     10 
Foundation; either version 3 of the License, or (at your option) any later
 
 paul@126     11 
version.
 
 paul@126     12 
 
 paul@126     13 
This program is distributed in the hope that it will be useful, but WITHOUT
 
 paul@126     14 
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 
 paul@126     15 
FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 
 paul@126     16 
details.
 
 paul@126     17 
 
 paul@126     18 
You should have received a copy of the GNU General Public License along with
 
 paul@126     19 
this program.  If not, see <http://www.gnu.org/licenses/>.
 
 paul@126     20 
"""
 
 paul@126     21 
 
 paul@609     22 
from common import CommonOutput, copy
 
 paul@623     23 
from encoders import encode_code, \
 
 paul@623     24 
                     encode_function_pointer, \
 
 paul@136     25 
                     encode_instantiator_pointer, \
 
 paul@136     26 
                     encode_literal_constant, encode_literal_constant_member, \
 
 paul@378     27 
                     encode_literal_constant_size, encode_literal_constant_value, \
 
 paul@786     28 
                     encode_literal_reference, \
 
 paul@623     29 
                     encode_path, encode_pcode, encode_pos, encode_ppos, \
 
 paul@150     30 
                     encode_predefined_reference, encode_size, \
 
 paul@150     31 
                     encode_symbol, encode_tablename, \
 
 paul@850     32 
                     encode_trailing_area, \
 
 paul@318     33 
                     encode_type_attribute, decode_type_attribute, \
 
 paul@318     34 
                     is_type_attribute
 
 paul@609     35 
from os import listdir, mkdir, remove
 
 paul@609     36 
from os.path import exists, isdir, join, split, splitext
 
 paul@126     37 
from referencing import Reference
 
 paul@126     38 
 
 paul@126     39 
class Generator(CommonOutput):
 
 paul@126     40 
 
 paul@126     41 
    "A code generator."
 
 paul@126     42 
 
 paul@274     43 
    # NOTE: These must be synchronised with the library.
 
 paul@274     44 
 
 paul@778     45 
    dict_type = "__builtins__.dict.dict"
 
 paul@850     46 
    float_type = "__builtins__.float.float"
 
 paul@126     47 
    function_type = "__builtins__.core.function"
 
 paul@758     48 
    int_type = "__builtins__.int.int"
 
 paul@778     49 
    list_type = "__builtins__.list.list"
 
 paul@400     50 
    none_type = "__builtins__.none.NoneType"
 
 paul@938     51 
    string_type = "__builtins__.str.str"
 
 paul@778     52 
    tuple_type = "__builtins__.tuple.tuple"
 
 paul@274     53 
    type_type = "__builtins__.core.type"
 
 paul@934     54 
    unicode_type = "__builtins__.unicode.unicode"
 
 paul@400     55 
 
 paul@400     56 
    none_value = "__builtins__.none.None"
 
 paul@158     57 
 
 paul@136     58 
    predefined_constant_members = (
 
 paul@158     59 
        ("__builtins__.boolean", "False"),
 
 paul@158     60 
        ("__builtins__.boolean", "True"),
 
 paul@136     61 
        ("__builtins__.none", "None"),
 
 paul@136     62 
        ("__builtins__.notimplemented", "NotImplemented"),
 
 paul@136     63 
        )
 
 paul@136     64 
 
 paul@778     65 
    literal_instantiator_types = (
 
 paul@778     66 
        dict_type, list_type, tuple_type
 
 paul@283     67 
        )
 
 paul@283     68 
 
 paul@850     69 
    # Data types with a trailing data member of the given native types.
 
 paul@850     70 
 
 paul@850     71 
    trailing_data_types = {
 
 paul@850     72 
        float_type : "double",
 
 paul@850     73 
        }
 
 paul@850     74 
 
 paul@126     75 
    def __init__(self, importer, optimiser, output):
 
 paul@357     76 
 
 paul@357     77 
        """
 
 paul@357     78 
        Initialise the generator with the given 'importer', 'optimiser' and
 
 paul@357     79 
        'output' directory.
 
 paul@357     80 
        """
 
 paul@357     81 
 
 paul@126     82 
        self.importer = importer
 
 paul@126     83 
        self.optimiser = optimiser
 
 paul@126     84 
        self.output = output
 
 paul@126     85 
 
 paul@649     86 
        # The special instance indicator.
 
 paul@649     87 
 
 paul@649     88 
        self.instancepos = self.optimiser.attr_locations["__class__"]
 
 paul@649     89 
 
 paul@649     90 
    def to_output(self, reset=False, debug=False, gc_sections=False):
 
 paul@126     91 
 
 paul@126     92 
        "Write the generated code."
 
 paul@126     93 
 
 paul@617     94 
        self.check_output("debug=%r gc_sections=%r" % (debug, gc_sections))
 
 paul@126     95 
        self.write_structures()
 
 paul@614     96 
        self.write_scripts(debug, gc_sections)
 
 paul@649     97 
        self.copy_templates(reset)
 
 paul@126     98 
 
 paul@649     99 
    def copy_templates(self, reset=False):
 
 paul@126    100 
 
 paul@126    101 
        "Copy template files to the generated output directory."
 
 paul@126    102 
 
 paul@126    103 
        templates = join(split(__file__)[0], "templates")
 
 paul@126    104 
 
 paul@649    105 
        only_if_newer = not reset
 
 paul@649    106 
 
 paul@126    107 
        for filename in listdir(templates):
 
 paul@183    108 
            target = self.output
 
 paul@354    109 
            pathname = join(templates, filename)
 
 paul@354    110 
 
 paul@354    111 
            # Copy files into the target directory.
 
 paul@354    112 
 
 paul@354    113 
            if not isdir(pathname):
 
 paul@649    114 
                copy(pathname, target, only_if_newer)
 
 paul@354    115 
 
 paul@354    116 
            # Copy directories (such as the native code directory).
 
 paul@354    117 
 
 paul@354    118 
            else:
 
 paul@354    119 
                target = join(self.output, filename)
 
 paul@354    120 
 
 paul@354    121 
                if not exists(target):
 
 paul@354    122 
                    mkdir(target)
 
 paul@354    123 
 
 paul@609    124 
                existing = listdir(target)
 
 paul@609    125 
                needed = listdir(pathname)
 
 paul@609    126 
 
 paul@609    127 
                # Determine which files are superfluous by comparing their
 
 paul@609    128 
                # basenames (without extensions) to those of the needed
 
 paul@609    129 
                # filenames. This should preserve object files for needed source
 
 paul@609    130 
                # files, only discarding completely superfluous files from the
 
 paul@609    131 
                # target directory.
 
 paul@609    132 
 
 paul@609    133 
                needed_basenames = set()
 
 paul@609    134 
                for filename in needed:
 
 paul@609    135 
                    needed_basenames.add(splitext(filename)[0])
 
 paul@609    136 
 
 paul@609    137 
                superfluous = []
 
 paul@609    138 
                for filename in existing:
 
 paul@609    139 
                    if splitext(filename)[0] not in needed_basenames:
 
 paul@609    140 
                        superfluous.append(filename)
 
 paul@609    141 
 
 paul@609    142 
                # Copy needed files.
 
 paul@609    143 
 
 paul@609    144 
                for filename in needed:
 
 paul@649    145 
                    copy(join(pathname, filename), target, only_if_newer)
 
 paul@126    146 
 
 paul@609    147 
                # Remove superfluous files.
 
 paul@609    148 
 
 paul@609    149 
                for filename in superfluous:
 
 paul@609    150 
                    remove(join(target, filename))
 
 paul@609    151 
 
 paul@126    152 
    def write_structures(self):
 
 paul@126    153 
 
 paul@126    154 
        "Write structures used by the program."
 
 paul@126    155 
 
 paul@126    156 
        f_consts = open(join(self.output, "progconsts.h"), "w")
 
 paul@126    157 
        f_defs = open(join(self.output, "progtypes.c"), "w")
 
 paul@126    158 
        f_decls = open(join(self.output, "progtypes.h"), "w")
 
 paul@126    159 
        f_signatures = open(join(self.output, "main.h"), "w")
 
 paul@126    160 
        f_code = open(join(self.output, "main.c"), "w")
 
 paul@664    161 
        f_calls = open(join(self.output, "calls.c"), "w")
 
 paul@664    162 
        f_call_macros = open(join(self.output, "calls.h"), "w")
 
 paul@126    163 
 
 paul@126    164 
        try:
 
 paul@126    165 
            # Output boilerplate.
 
 paul@126    166 
 
 paul@126    167 
            print >>f_consts, """\
 
 paul@126    168 
#ifndef __PROGCONSTS_H__
 
 paul@126    169 
#define __PROGCONSTS_H__
 
 paul@623    170 
 
 paul@623    171 
#include "types.h"
 
 paul@126    172 
"""
 
 paul@126    173 
            print >>f_decls, """\
 
 paul@126    174 
#ifndef __PROGTYPES_H__
 
 paul@126    175 
#define __PROGTYPES_H__
 
 paul@126    176 
 
 paul@126    177 
#include "progconsts.h"
 
 paul@126    178 
#include "types.h"
 
 paul@126    179 
"""
 
 paul@126    180 
            print >>f_defs, """\
 
 paul@126    181 
#include "progtypes.h"
 
 paul@132    182 
#include "progops.h"
 
 paul@126    183 
#include "main.h"
 
 paul@126    184 
"""
 
 paul@126    185 
            print >>f_signatures, """\
 
 paul@126    186 
#ifndef __MAIN_H__
 
 paul@126    187 
#define __MAIN_H__
 
 paul@126    188 
 
 paul@126    189 
#include "types.h"
 
 paul@126    190 
"""
 
 paul@126    191 
            print >>f_code, """\
 
 paul@126    192 
#include <string.h>
 
 paul@159    193 
#include <stdio.h>
 
 paul@434    194 
#include "gc.h"
 
 paul@872    195 
#include "signals.h"
 
 paul@126    196 
#include "types.h"
 
 paul@159    197 
#include "exceptions.h"
 
 paul@126    198 
#include "ops.h"
 
 paul@126    199 
#include "progconsts.h"
 
 paul@126    200 
#include "progtypes.h"
 
 paul@490    201 
#include "main.h"
 
 paul@126    202 
#include "progops.h"
 
 paul@664    203 
#include "calls.h"
 
 paul@664    204 
"""
 
 paul@664    205 
 
 paul@664    206 
            print >>f_call_macros, """\
 
 paul@664    207 
#ifndef __CALLS_H__
 
 paul@664    208 
#define __CALLS_H__
 
 paul@664    209 
 
 paul@664    210 
#include "types.h"
 
 paul@126    211 
"""
 
 paul@126    212 
 
 paul@126    213 
            # Generate table and structure data.
 
 paul@126    214 
 
 paul@126    215 
            function_instance_attrs = None
 
 paul@847    216 
            objects = self.optimiser.all_attrs.items()
 
 paul@126    217 
            objects.sort()
 
 paul@126    218 
 
 paul@357    219 
            self.callables = {}
 
 paul@357    220 
 
 paul@847    221 
            for ref, attrnames in objects:
 
 paul@126    222 
                kind = ref.get_kind()
 
 paul@126    223 
                path = ref.get_origin()
 
 paul@150    224 
                table_name = encode_tablename(kind, path)
 
 paul@150    225 
                structure_size = encode_size(kind, path)
 
 paul@126    226 
 
 paul@126    227 
                # Generate structures for classes and modules.
 
 paul@126    228 
 
 paul@126    229 
                if kind != "<instance>":
 
 paul@126    230 
                    structure = []
 
 paul@850    231 
                    trailing = []
 
 paul@126    232 
                    attrs = self.get_static_attributes(kind, path, attrnames)
 
 paul@126    233 
 
 paul@126    234 
                    # Set a special instantiator on the class.
 
 paul@126    235 
 
 paul@126    236 
                    if kind == "<class>":
 
 paul@126    237 
 
 paul@126    238 
                        # Write instantiator declarations based on the
 
 paul@126    239 
                        # applicable initialiser.
 
 paul@126    240 
 
 paul@126    241 
                        init_ref = attrs["__init__"]
 
 paul@126    242 
 
 paul@126    243 
                        # Write instantiator definitions.
 
 paul@126    244 
 
 paul@159    245 
                        self.write_instantiator(f_code, f_signatures, path, init_ref)
 
 paul@126    246 
 
 paul@357    247 
                        # Record the callable for parameter table generation.
 
 paul@357    248 
 
 paul@357    249 
                        self.callables[path] = init_ref.get_origin()
 
 paul@126    250 
 
 paul@357    251 
                        # Define special attributes.
 
 paul@357    252 
 
 paul@357    253 
                        attrs["__fn__"] = path
 
 paul@579    254 
                        attrs["__args__"] = path
 
 paul@126    255 
 
 paul@126    256 
                    self.populate_structure(Reference(kind, path), attrs, kind, structure)
 
 paul@850    257 
                    self.populate_trailing(Reference(kind, path), attrs, trailing)
 
 paul@136    258 
 
 paul@136    259 
                    if kind == "<class>":
 
 paul@884    260 
                        self.write_instance_structure(f_decls, path)
 
 paul@136    261 
 
 paul@850    262 
                    self.write_structure(f_decls, f_defs, path, table_name,
 
 paul@850    263 
                                         structure, trailing, ref)
 
 paul@126    264 
 
 paul@126    265 
                # Record function instance details for function generation below.
 
 paul@126    266 
 
 paul@126    267 
                else:
 
 paul@126    268 
                    attrs = self.get_instance_attributes(path, attrnames)
 
 paul@126    269 
                    if path == self.function_type:
 
 paul@126    270 
                        function_instance_attrs = attrs
 
 paul@126    271 
 
 paul@357    272 
                        # Record the callable for parameter table generation.
 
 paul@357    273 
 
 paul@357    274 
                        self.callables[path] = path
 
 paul@357    275 
 
 paul@126    276 
                # Write a table for all objects.
 
 paul@126    277 
 
 paul@126    278 
                table = []
 
 paul@126    279 
                self.populate_table(Reference(kind, path), table)
 
 paul@126    280 
                self.write_table(f_decls, f_defs, table_name, structure_size, table)
 
 paul@126    281 
 
 paul@126    282 
            # Generate function instances.
 
 paul@126    283 
 
 paul@195    284 
            functions = self.importer.function_parameters.keys()
 
 paul@126    285 
            functions.sort()
 
 paul@211    286 
            extra_function_instances = []
 
 paul@126    287 
 
 paul@126    288 
            for path in functions:
 
 paul@195    289 
 
 paul@195    290 
                # Instantiators are generated above.
 
 paul@195    291 
 
 paul@195    292 
                if self.importer.classes.has_key(path) or not self.importer.get_object(path):
 
 paul@195    293 
                    continue
 
 paul@195    294 
 
 paul@357    295 
                # Record the callable for parameter table generation.
 
 paul@357    296 
 
 paul@357    297 
                self.callables[path] = path
 
 paul@357    298 
 
 paul@357    299 
                # Define the structure details.
 
 paul@357    300 
 
 paul@126    301 
                cls = self.function_type
 
 paul@150    302 
                table_name = encode_tablename("<instance>", cls)
 
 paul@126    303 
 
 paul@126    304 
                # Set a special callable attribute on the instance.
 
 paul@126    305 
 
 paul@126    306 
                function_instance_attrs["__fn__"] = path
 
 paul@579    307 
                function_instance_attrs["__args__"] = path
 
 paul@126    308 
 
 paul@575    309 
                structure = self.populate_function(path, function_instance_attrs)
 
 paul@850    310 
                self.write_structure(f_decls, f_defs, path, table_name, structure, [], Reference("<function>", path))
 
 paul@126    311 
 
 paul@154    312 
                # Functions with defaults need to declare instance structures.
 
 paul@154    313 
 
 paul@154    314 
                if self.importer.function_defaults.get(path):
 
 paul@884    315 
                    self.write_instance_structure(f_decls, path)
 
 paul@211    316 
                    extra_function_instances.append(path)
 
 paul@154    317 
 
 paul@126    318 
                # Write function declarations.
 
 paul@664    319 
                # Signature: __attr <name>(...);
 
 paul@126    320 
 
 paul@664    321 
                parameters = self.importer.function_parameters[path]
 
 paul@664    322 
                l = ["__attr"] * (len(parameters) + 1)
 
 paul@664    323 
                print >>f_signatures, "__attr %s(%s);" % (encode_function_pointer(path), ", ".join(l))
 
 paul@126    324 
 
 paul@579    325 
            # Generate parameter table size data.
 
 paul@579    326 
 
 paul@579    327 
            min_parameters = {}
 
 paul@579    328 
            max_parameters = {}
 
 paul@579    329 
            size_parameters = {}
 
 paul@664    330 
            all_max_parameters = set()
 
 paul@579    331 
 
 paul@357    332 
            # Consolidate parameter tables for instantiators and functions.
 
 paul@357    333 
 
 paul@357    334 
            parameter_tables = set()
 
 paul@126    335 
 
 paul@357    336 
            for path, function_path in self.callables.items():
 
 paul@579    337 
                argmin, argmax = self.get_argument_limits(function_path)
 
 paul@579    338 
 
 paul@579    339 
                # Obtain the parameter table members.
 
 paul@579    340 
 
 paul@357    341 
                parameters = self.optimiser.parameters[function_path]
 
 paul@357    342 
                if not parameters:
 
 paul@357    343 
                    parameters = ()
 
 paul@357    344 
                else:
 
 paul@357    345 
                    parameters = tuple(parameters)
 
 paul@579    346 
 
 paul@579    347 
                # Define each table in terms of the members and the minimum
 
 paul@579    348 
                # number of arguments.
 
 paul@579    349 
 
 paul@579    350 
                parameter_tables.add((argmin, parameters))
 
 paul@579    351 
                signature = self.get_parameter_signature(argmin, parameters)
 
 paul@579    352 
 
 paul@579    353 
                # Record the minimum number of arguments, the maximum number,
 
 paul@579    354 
                # and the size of the table.
 
 paul@579    355 
 
 paul@579    356 
                min_parameters[signature] = argmin
 
 paul@579    357 
                max_parameters[signature] = argmax
 
 paul@579    358 
                size_parameters[signature] = len(parameters)
 
 paul@664    359 
                all_max_parameters.add(argmax)
 
 paul@579    360 
 
 paul@579    361 
            self.write_size_constants(f_consts, "pmin", min_parameters, 0)
 
 paul@579    362 
            self.write_size_constants(f_consts, "pmax", max_parameters, 0)
 
 paul@579    363 
            self.write_size_constants(f_consts, "psize", size_parameters, 0)
 
 paul@357    364 
 
 paul@357    365 
            # Generate parameter tables for distinct function signatures.
 
 paul@357    366 
 
 paul@579    367 
            for argmin, parameters in parameter_tables:
 
 paul@579    368 
                self.make_parameter_table(f_decls, f_defs, argmin, parameters)
 
 paul@126    369 
 
 paul@136    370 
            # Generate predefined constants.
 
 paul@136    371 
 
 paul@136    372 
            for path, name in self.predefined_constant_members:
 
 paul@136    373 
                self.make_predefined_constant(f_decls, f_defs, path, name)
 
 paul@136    374 
 
 paul@136    375 
            # Generate literal constants.
 
 paul@136    376 
 
 paul@397    377 
            for constant, n in self.optimiser.constants.items():
 
 paul@397    378 
                self.make_literal_constant(f_decls, f_defs, n, constant)
 
 paul@136    379 
 
 paul@758    380 
            # Generate a common integer instance object, referenced when integer
 
 paul@758    381 
            # attributes are accessed.
 
 paul@758    382 
 
 paul@758    383 
            self.make_common_integer(f_decls, f_defs)
 
 paul@758    384 
 
 paul@146    385 
            # Finish the main source file.
 
 paul@146    386 
 
 paul@146    387 
            self.write_main_program(f_code, f_signatures)
 
 paul@146    388 
 
 paul@211    389 
            # Record size information for certain function instances as well as
 
 paul@211    390 
            # for classes, modules and other instances.
 
 paul@211    391 
 
 paul@211    392 
            size_tables = {}
 
 paul@211    393 
 
 paul@211    394 
            for kind in ["<class>", "<module>", "<instance>"]:
 
 paul@211    395 
                size_tables[kind] = {}
 
 paul@211    396 
 
 paul@211    397 
            # Generate structure size data.
 
 paul@211    398 
 
 paul@211    399 
            for ref, structure in self.optimiser.structures.items():
 
 paul@211    400 
                size_tables[ref.get_kind()][ref.get_origin()] = len(structure)
 
 paul@211    401 
 
 paul@211    402 
            for path in extra_function_instances:
 
 paul@211    403 
                defaults = self.importer.function_defaults[path]
 
 paul@211    404 
                size_tables["<instance>"][path] = size_tables["<instance>"][self.function_type] + len(defaults)
 
 paul@211    405 
 
 paul@211    406 
            size_tables = size_tables.items()
 
 paul@211    407 
            size_tables.sort()
 
 paul@211    408 
 
 paul@211    409 
            for kind, sizes in size_tables:
 
 paul@211    410 
                self.write_size_constants(f_consts, kind, sizes, 0)
 
 paul@211    411 
 
 paul@211    412 
            # Generate parameter codes.
 
 paul@211    413 
 
 paul@623    414 
            self.write_code_constants(f_consts, self.optimiser.all_paramnames,
 
 paul@623    415 
                                      self.optimiser.arg_locations,
 
 paul@623    416 
                                      "pcode", "ppos", encode_pcode, encode_ppos)
 
 paul@211    417 
 
 paul@211    418 
            # Generate attribute codes.
 
 paul@211    419 
 
 paul@623    420 
            self.write_code_constants(f_consts, self.optimiser.all_attrnames,
 
 paul@623    421 
                                      self.optimiser.locations,
 
 paul@623    422 
                                      "code", "pos", encode_code, encode_pos)
 
 paul@211    423 
 
 paul@850    424 
            # Generate trailing data macros of the form...
 
 paul@850    425 
            # #define __TRAILING_typename nativetype trailing;
 
 paul@850    426 
 
 paul@850    427 
            for name, member_type in self.trailing_data_types.items():
 
 paul@850    428 
                print >>f_consts, "#define %s %s trailing;" % (encode_symbol("TRAILING", name), member_type)
 
 paul@850    429 
 
 paul@664    430 
            # Generate macros for calls.
 
 paul@664    431 
 
 paul@664    432 
            all_max_parameters = list(all_max_parameters)
 
 paul@664    433 
            all_max_parameters.sort()
 
 paul@664    434 
 
 paul@664    435 
            for argmax in all_max_parameters:
 
 paul@664    436 
                l = []
 
 paul@664    437 
                argnum = 0
 
 paul@664    438 
                while argnum < argmax:
 
 paul@664    439 
                    l.append("ARGS[%d]" % argnum)
 
 paul@664    440 
                    argnum += 1
 
 paul@664    441 
 
 paul@664    442 
                print >>f_call_macros, "#define __CALL%d(FN, ARGS) (FN(%s))" % (argmax, ", ".join(l))
 
 paul@664    443 
 
 paul@664    444 
            # Generate a generic invocation function.
 
 paul@664    445 
 
 paul@664    446 
            print >>f_call_macros, "__attr __call_with_args(__attr (*fn)(), __attr args[], unsigned int n);"
 
 paul@664    447 
 
 paul@664    448 
            print >>f_calls, """\
 
 paul@664    449 
#include "types.h"
 
 paul@664    450 
#include "calls.h"
 
 paul@664    451 
 
 paul@664    452 
__attr __call_with_args(__attr (*fn)(), __attr args[], unsigned int n)
 
 paul@664    453 
{
 
 paul@664    454 
    switch (n)
 
 paul@664    455 
    {"""
 
 paul@664    456 
 
 paul@664    457 
            for argmax in all_max_parameters:
 
 paul@664    458 
                print >>f_calls, """\
 
 paul@664    459 
        case %d: return __CALL%d(fn, args);""" % (argmax, argmax)
 
 paul@664    460 
 
 paul@664    461 
            print >>f_calls, """\
 
 paul@664    462 
        default: return __NULL;
 
 paul@664    463 
    }
 
 paul@664    464 
}"""
 
 paul@664    465 
 
 paul@126    466 
            # Output more boilerplate.
 
 paul@126    467 
 
 paul@126    468 
            print >>f_consts, """\
 
 paul@126    469 
 
 paul@126    470 
#endif /* __PROGCONSTS_H__ */"""
 
 paul@126    471 
 
 paul@126    472 
            print >>f_decls, """\
 
 paul@126    473 
 
 paul@126    474 
#define __FUNCTION_TYPE %s
 
 paul@126    475 
#define __FUNCTION_INSTANCE_SIZE %s
 
 paul@274    476 
#define __TYPE_CLASS_TYPE %s
 
 paul@274    477 
#define __TYPE_CLASS_POS %s
 
 paul@274    478 
#define __TYPE_CLASS_CODE %s
 
 paul@126    479 
 
 paul@126    480 
#endif /* __PROGTYPES_H__ */""" % (
 
 paul@126    481 
    encode_path(self.function_type),
 
 paul@233    482 
    encode_size("<instance>", self.function_type),
 
 paul@274    483 
    encode_path(self.type_type),
 
 paul@623    484 
    encode_pos(encode_type_attribute(self.type_type)),
 
 paul@623    485 
    encode_code(encode_type_attribute(self.type_type)),
 
 paul@126    486 
    )
 
 paul@126    487 
 
 paul@126    488 
            print >>f_signatures, """\
 
 paul@126    489 
 
 paul@126    490 
#endif /* __MAIN_H__ */"""
 
 paul@126    491 
 
 paul@664    492 
            print >>f_call_macros, """\
 
 paul@664    493 
 
 paul@664    494 
#endif /* __CALLS_H__ */"""
 
 paul@664    495 
 
 paul@126    496 
        finally:
 
 paul@126    497 
            f_consts.close()
 
 paul@126    498 
            f_defs.close()
 
 paul@126    499 
            f_decls.close()
 
 paul@126    500 
            f_signatures.close()
 
 paul@126    501 
            f_code.close()
 
 paul@664    502 
            f_calls.close()
 
 paul@664    503 
            f_call_macros.close()
 
 paul@126    504 
 
 paul@614    505 
    def write_scripts(self, debug, gc_sections):
 
 paul@511    506 
 
 paul@511    507 
        "Write scripts used to build the program."
 
 paul@511    508 
 
 paul@649    509 
        # Options affect compiling and linking.
 
 paul@649    510 
 
 paul@511    511 
        f_options = open(join(self.output, "options.mk"), "w")
 
 paul@511    512 
        try:
 
 paul@511    513 
            if debug:
 
 paul@511    514 
                print >>f_options, "CFLAGS = -g"
 
 paul@666    515 
            else:
 
 paul@666    516 
                print >>f_options, "CFLAGS = -O2"
 
 paul@511    517 
 
 paul@614    518 
            if gc_sections:
 
 paul@614    519 
                print >>f_options, "include gc_sections.mk"
 
 paul@614    520 
 
 paul@649    521 
        finally:
 
 paul@649    522 
            f_options.close()
 
 paul@649    523 
 
 paul@649    524 
        # Native and module definitions divide the program modules into native
 
 paul@649    525 
        # and generated code.
 
 paul@649    526 
 
 paul@649    527 
        f_native = open(join(self.output, "native.mk"), "w")
 
 paul@649    528 
        f_modules = open(join(self.output, "modules.mk"), "w")
 
 paul@649    529 
        try:
 
 paul@539    530 
            # Identify modules used by the program.
 
 paul@511    531 
 
 paul@539    532 
            native_modules = [join("native", "common.c")]
 
 paul@539    533 
            modules = []
 
 paul@511    534 
 
 paul@511    535 
            for name in self.importer.modules.keys():
 
 paul@511    536 
                parts = name.split(".", 1)
 
 paul@511    537 
 
 paul@511    538 
                # Identify source files to be built.
 
 paul@511    539 
 
 paul@511    540 
                if parts[0] == "native":
 
 paul@539    541 
                    native_modules.append(join("native", "%s.c" % parts[1]))
 
 paul@539    542 
                else:
 
 paul@539    543 
                    modules.append(join("src", "%s.c" % name))
 
 paul@511    544 
 
 paul@511    545 
            print >>f_native, "SRC =", " ".join(native_modules)
 
 paul@539    546 
            print >>f_modules, "SRC +=", " ".join(modules)
 
 paul@511    547 
 
 paul@511    548 
        finally:
 
 paul@511    549 
            f_native.close()
 
 paul@539    550 
            f_modules.close()
 
 paul@649    551 
 
 paul@649    552 
        # Instance position configuration uses the position of the ubiquitous
 
 paul@649    553 
        # __class__ attribute as a means of indicating that an object is an
 
 paul@649    554 
        # instance. Classes employ special identifying attributes that are
 
 paul@649    555 
        # positioned elsewhere and thus cannot be in the same location as the
 
 paul@649    556 
        # __class__ attribute.
 
 paul@649    557 
 
 paul@649    558 
        f_instancepos = open(join(self.output, "instancepos.h"), "w")
 
 paul@649    559 
        try:
 
 paul@649    560 
            print >>f_instancepos, """\
 
 paul@649    561 
#ifndef __INSTANCEPOS
 
 paul@649    562 
#define __INSTANCEPOS %d
 
 paul@649    563 
#endif
 
 paul@649    564 
""" % self.instancepos
 
 paul@649    565 
        finally:
 
 paul@649    566 
            f_instancepos.close()
 
 paul@511    567 
 
 paul@397    568 
    def make_literal_constant(self, f_decls, f_defs, n, constant):
 
 paul@136    569 
 
 paul@136    570 
        """
 
 paul@136    571 
        Write literal constant details to 'f_decls' (to declare a structure) and
 
 paul@136    572 
        to 'f_defs' (to define the contents) for the constant with the number
 
 paul@397    573 
        'n' with the given 'constant'.
 
 paul@136    574 
        """
 
 paul@136    575 
 
 paul@406    576 
        value, value_type, encoding = constant
 
 paul@397    577 
 
 paul@758    578 
        # Do not generate individual integer constants.
 
 paul@758    579 
 
 paul@758    580 
        if value_type == self.int_type:
 
 paul@758    581 
            return
 
 paul@758    582 
 
 paul@136    583 
        const_path = encode_literal_constant(n)
 
 paul@136    584 
        structure_name = encode_literal_reference(n)
 
 paul@136    585 
 
 paul@397    586 
        ref = Reference("<instance>", value_type)
 
 paul@406    587 
        self.make_constant(f_decls, f_defs, ref, const_path, structure_name, value, encoding)
 
 paul@136    588 
 
 paul@136    589 
    def make_predefined_constant(self, f_decls, f_defs, path, name):
 
 paul@136    590 
 
 paul@136    591 
        """
 
 paul@136    592 
        Write predefined constant details to 'f_decls' (to declare a structure)
 
 paul@136    593 
        and to 'f_defs' (to define the contents) for the constant located in
 
 paul@136    594 
        'path' with the given 'name'.
 
 paul@136    595 
        """
 
 paul@136    596 
 
 paul@136    597 
        # Determine the details of the constant.
 
 paul@136    598 
 
 paul@136    599 
        attr_path = "%s.%s" % (path, name)
 
 paul@136    600 
        structure_name = encode_predefined_reference(attr_path)
 
 paul@136    601 
        ref = self.importer.get_object(attr_path)
 
 paul@136    602 
 
 paul@136    603 
        self.make_constant(f_decls, f_defs, ref, attr_path, structure_name)
 
 paul@136    604 
 
 paul@758    605 
    def make_common_integer(self, f_decls, f_defs):
 
 paul@758    606 
 
 paul@758    607 
        """
 
 paul@758    608 
        Write common integer instance details to 'f_decls' (to declare a
 
 paul@758    609 
        structure) and to 'f_defs' (to define the contents).
 
 paul@758    610 
        """
 
 paul@758    611 
 
 paul@758    612 
        ref = Reference("<instance>", self.int_type)
 
 paul@758    613 
        self.make_constant(f_decls, f_defs, ref, "__common_integer", "__common_integer_obj")
 
 paul@758    614 
 
 paul@406    615 
    def make_constant(self, f_decls, f_defs, ref, const_path, structure_name, data=None, encoding=None):
 
 paul@136    616 
 
 paul@136    617 
        """
 
 paul@136    618 
        Write constant details to 'f_decls' (to declare a structure) and to
 
 paul@136    619 
        'f_defs' (to define the contents) for the constant described by 'ref'
 
 paul@758    620 
        having the given 'const_path' (providing an attribute for the constant)
 
 paul@758    621 
        and 'structure_name' (for the constant structure itself).
 
 paul@406    622 
 
 paul@406    623 
        The additional 'data' and 'encoding' are used to describe specific
 
 paul@406    624 
        values.
 
 paul@136    625 
        """
 
 paul@136    626 
 
 paul@136    627 
        # Obtain the attributes.
 
 paul@136    628 
 
 paul@136    629 
        cls = ref.get_origin()
 
 paul@847    630 
        attrnames = self.optimiser.all_attrs[ref]
 
 paul@136    631 
        attrs = self.get_instance_attributes(cls, attrnames)
 
 paul@136    632 
 
 paul@136    633 
        # Set the data, if provided.
 
 paul@136    634 
 
 paul@136    635 
        if data is not None:
 
 paul@850    636 
 
 paul@850    637 
            # Data retained by special attribute.
 
 paul@850    638 
 
 paul@850    639 
            if attrs.has_key("__data__"):
 
 paul@850    640 
                attrs["__data__"] = data
 
 paul@850    641 
 
 paul@850    642 
            # Data retained by a trailing data area.
 
 paul@850    643 
 
 paul@850    644 
            elif attrs.has_key("__trailing__"):
 
 paul@850    645 
                attrs["__trailing__"] = data
 
 paul@136    646 
 
 paul@360    647 
            # Also set a key for dynamic attribute lookup, if a string.
 
 paul@360    648 
 
 paul@397    649 
            if attrs.has_key("__key__"):
 
 paul@360    650 
                if data in self.optimiser.all_attrnames:
 
 paul@360    651 
                    attrs["__key__"] = data
 
 paul@360    652 
                else:
 
 paul@360    653 
                    attrs["__key__"] = None
 
 paul@360    654 
 
 paul@583    655 
            # Initialise the size, if a string.
 
 paul@583    656 
 
 paul@583    657 
            if attrs.has_key("__size__"):
 
 paul@583    658 
                attrs["__size__"] = len(data)
 
 paul@583    659 
 
 paul@400    660 
        # Define Unicode constant encoding details.
 
 paul@400    661 
 
 paul@400    662 
        if cls == self.unicode_type:
 
 paul@406    663 
 
 paul@406    664 
            # Reference the encoding's own constant value.
 
 paul@406    665 
 
 paul@406    666 
            if encoding:
 
 paul@406    667 
                n = self.optimiser.constants[(encoding, self.string_type, None)]
 
 paul@406    668 
 
 paul@406    669 
                # Employ a special alias that will be tested specifically in
 
 paul@406    670 
                # encode_member.
 
 paul@406    671 
 
 paul@609    672 
                encoding_ref = Reference("<instance>", self.string_type, "$c%s" % n)
 
 paul@406    673 
 
 paul@406    674 
            # Use None where no encoding was indicated.
 
 paul@406    675 
 
 paul@406    676 
            else:
 
 paul@406    677 
                encoding_ref = Reference("<instance>", self.none_type)
 
 paul@406    678 
 
 paul@406    679 
            attrs["encoding"] = encoding_ref
 
 paul@400    680 
 
 paul@136    681 
        # Define the structure details. An object is created for the constant,
 
 paul@136    682 
        # but an attribute is provided, referring to the object, for access to
 
 paul@136    683 
        # the constant in the program.
 
 paul@136    684 
 
 paul@136    685 
        structure = []
 
 paul@850    686 
        trailing = []
 
 paul@150    687 
        table_name = encode_tablename("<instance>", cls)
 
 paul@136    688 
        self.populate_structure(ref, attrs, ref.get_kind(), structure)
 
 paul@850    689 
        self.populate_trailing(ref, attrs, trailing)
 
 paul@850    690 
        self.write_structure(f_decls, f_defs, structure_name, table_name,
 
 paul@850    691 
                             structure, trailing, ref)
 
 paul@136    692 
 
 paul@136    693 
        # Define a macro for the constant.
 
 paul@136    694 
 
 paul@136    695 
        attr_name = encode_path(const_path)
 
 paul@626    696 
        print >>f_decls, "#define %s __ATTRVALUE(&%s)" % (attr_name, structure_name)
 
 paul@136    697 
 
 paul@579    698 
    def make_parameter_table(self, f_decls, f_defs, argmin, parameters):
 
 paul@126    699 
 
 paul@126    700 
        """
 
 paul@126    701 
        Write parameter table details to 'f_decls' (to declare a table) and to
 
 paul@579    702 
        'f_defs' (to define the contents) for the given 'argmin' and
 
 paul@579    703 
        'parameters'.
 
 paul@126    704 
        """
 
 paul@126    705 
 
 paul@357    706 
        # Use a signature for the table name instead of a separate name for each
 
 paul@357    707 
        # function.
 
 paul@357    708 
 
 paul@579    709 
        signature = self.get_parameter_signature(argmin, parameters)
 
 paul@357    710 
        table_name = encode_tablename("<function>", signature)
 
 paul@579    711 
        min_parameters = encode_size("pmin", signature)
 
 paul@579    712 
        max_parameters = encode_size("pmax", signature)
 
 paul@579    713 
        structure_size = encode_size("psize", signature)
 
 paul@357    714 
 
 paul@126    715 
        table = []
 
 paul@357    716 
        self.populate_parameter_table(parameters, table)
 
 paul@579    717 
        self.write_parameter_table(f_decls, f_defs, table_name, min_parameters, max_parameters, structure_size, table)
 
 paul@126    718 
 
 paul@579    719 
    def get_parameter_signature(self, argmin, parameters):
 
 paul@357    720 
 
 paul@579    721 
        "Return a signature for the given 'argmin' and 'parameters'."
 
 paul@357    722 
 
 paul@579    723 
        l = [str(argmin)]
 
 paul@357    724 
        for parameter in parameters:
 
 paul@357    725 
            if parameter is None:
 
 paul@357    726 
                l.append("")
 
 paul@357    727 
            else:
 
 paul@357    728 
                name, pos = parameter
 
 paul@361    729 
                l.append("%s_%s" % (name, pos))
 
 paul@357    730 
        return l and "__".join(l) or "__void"
 
 paul@357    731 
 
 paul@357    732 
    def get_signature_for_callable(self, path):
 
 paul@357    733 
 
 paul@357    734 
        "Return the signature for the callable with the given 'path'."
 
 paul@357    735 
 
 paul@357    736 
        function_path = self.callables[path]
 
 paul@579    737 
        argmin, argmax = self.get_argument_limits(function_path)
 
 paul@357    738 
        parameters = self.optimiser.parameters[function_path]
 
 paul@579    739 
        return self.get_parameter_signature(argmin, parameters)
 
 paul@357    740 
 
 paul@126    741 
    def write_size_constants(self, f_consts, size_prefix, sizes, padding):
 
 paul@126    742 
 
 paul@126    743 
        """
 
 paul@126    744 
        Write size constants to 'f_consts' for the given 'size_prefix', using
 
 paul@126    745 
        the 'sizes' dictionary to populate the definition, adding the given
 
 paul@126    746 
        'padding' to the basic sizes.
 
 paul@126    747 
        """
 
 paul@126    748 
 
 paul@126    749 
        print >>f_consts, "enum %s {" % encode_size(size_prefix)
 
 paul@126    750 
        first = True
 
 paul@126    751 
        for path, size in sizes.items():
 
 paul@126    752 
            if not first:
 
 paul@126    753 
                print >>f_consts, ","
 
 paul@126    754 
            else:
 
 paul@126    755 
                first = False
 
 paul@126    756 
            f_consts.write("    %s = %d" % (encode_size(size_prefix, path), size + padding))
 
 paul@126    757 
        print >>f_consts, "\n    };"
 
 paul@126    758 
 
 paul@623    759 
    def write_code_constants(self, f_consts, attrnames, locations, code_prefix,
 
 paul@623    760 
                             pos_prefix, code_encoder, pos_encoder):
 
 paul@126    761 
 
 paul@126    762 
        """
 
 paul@126    763 
        Write code constants to 'f_consts' for the given 'attrnames' and
 
 paul@126    764 
        attribute 'locations'.
 
 paul@126    765 
        """
 
 paul@126    766 
 
 paul@132    767 
        print >>f_consts, "enum %s {" % encode_symbol(code_prefix)
 
 paul@126    768 
        first = True
 
 paul@126    769 
        for i, attrname in enumerate(attrnames):
 
 paul@126    770 
            if not first:
 
 paul@126    771 
                print >>f_consts, ","
 
 paul@126    772 
            else:
 
 paul@126    773 
                first = False
 
 paul@623    774 
            f_consts.write("    %s = %d" % (code_encoder(attrname), i))
 
 paul@126    775 
        print >>f_consts, "\n    };"
 
 paul@126    776 
 
 paul@132    777 
        print >>f_consts, "enum %s {" % encode_symbol(pos_prefix)
 
 paul@126    778 
        first = True
 
 paul@126    779 
        for i, attrnames in enumerate(locations):
 
 paul@126    780 
            for attrname in attrnames:
 
 paul@126    781 
                if not first:
 
 paul@126    782 
                    print >>f_consts, ","
 
 paul@126    783 
                else:
 
 paul@126    784 
                    first = False
 
 paul@623    785 
                f_consts.write("    %s = %d" % (pos_encoder(attrname), i))
 
 paul@126    786 
        print >>f_consts, "\n    };"
 
 paul@126    787 
 
 paul@126    788 
    def write_table(self, f_decls, f_defs, table_name, structure_size, table):
 
 paul@126    789 
 
 paul@126    790 
        """
 
 paul@126    791 
        Write the declarations to 'f_decls' and definitions to 'f_defs' for
 
 paul@126    792 
        the object having the given 'table_name' and the given 'structure_size',
 
 paul@126    793 
        with 'table' details used to populate the definition.
 
 paul@126    794 
        """
 
 paul@126    795 
 
 paul@126    796 
        print >>f_decls, "extern const __table %s;\n" % table_name
 
 paul@126    797 
 
 paul@126    798 
        # Write the corresponding definition.
 
 paul@126    799 
 
 paul@570    800 
        print >>f_defs, """\
 
 paul@570    801 
const __table %s = {
 
 paul@570    802 
    %s,
 
 paul@570    803 
    {
 
 paul@570    804 
        %s
 
 paul@570    805 
    }
 
 paul@570    806 
};
 
 paul@579    807 
""" % (table_name, structure_size,
 
 paul@579    808 
       ",\n        ".join(table))
 
 paul@126    809 
 
 paul@579    810 
    def write_parameter_table(self, f_decls, f_defs, table_name, min_parameters,
 
 paul@579    811 
                              max_parameters, structure_size, table):
 
 paul@126    812 
 
 paul@126    813 
        """
 
 paul@126    814 
        Write the declarations to 'f_decls' and definitions to 'f_defs' for
 
 paul@579    815 
        the object having the given 'table_name' and the given 'min_parameters',
 
 paul@579    816 
        'max_parameters' and 'structure_size', with 'table' details used to
 
 paul@579    817 
        populate the definition.
 
 paul@126    818 
        """
 
 paul@126    819 
 
 paul@570    820 
        members = []
 
 paul@570    821 
        for t in table:
 
 paul@579    822 
            members.append("{.code=%s, .pos=%s}" % t)
 
 paul@570    823 
 
 paul@126    824 
        print >>f_decls, "extern const __ptable %s;\n" % table_name
 
 paul@126    825 
 
 paul@126    826 
        # Write the corresponding definition.
 
 paul@126    827 
 
 paul@570    828 
        print >>f_defs, """\
 
 paul@570    829 
const __ptable %s = {
 
 paul@579    830 
    .min=%s,
 
 paul@579    831 
    .max=%s,
 
 paul@579    832 
    .size=%s,
 
 paul@570    833 
    {
 
 paul@570    834 
        %s
 
 paul@570    835 
    }
 
 paul@570    836 
};
 
 paul@579    837 
""" % (table_name, min_parameters, max_parameters, structure_size,
 
 paul@579    838 
       ",\n        ".join(members))
 
 paul@126    839 
 
 paul@884    840 
    def write_instance_structure(self, f_decls, path):
 
 paul@126    841 
 
 paul@126    842 
        """
 
 paul@884    843 
        Write a declaration to 'f_decls' for the object having the given 'path'.
 
 paul@126    844 
        """
 
 paul@126    845 
 
 paul@884    846 
        structure_size = encode_size("<instance>", path)
 
 paul@884    847 
 
 paul@126    848 
        # Write an instance-specific type definition for instances of classes.
 
 paul@126    849 
        # See: templates/types.h
 
 paul@126    850 
 
 paul@850    851 
        trailing_area = path in self.trailing_data_types and encode_trailing_area(path) or ""
 
 paul@850    852 
 
 paul@126    853 
        print >>f_decls, """\
 
 paul@126    854 
typedef struct {
 
 paul@126    855 
    const __table * table;
 
 paul@568    856 
    __pos pos;
 
 paul@126    857 
    __attr attrs[%s];
 
 paul@850    858 
%s
 
 paul@126    859 
} %s;
 
 paul@850    860 
""" % (structure_size, trailing_area, encode_symbol("obj", path))
 
 paul@136    861 
 
 paul@850    862 
    def write_structure(self, f_decls, f_defs, structure_name, table_name,
 
 paul@850    863 
                        structure, trailing, ref):
 
 paul@126    864 
 
 paul@136    865 
        """
 
 paul@136    866 
        Write the declarations to 'f_decls' and definitions to 'f_defs' for
 
 paul@136    867 
        the object having the given 'structure_name', the given 'table_name',
 
 paul@850    868 
        the given 'structure' details and any 'trailing' member details, used to
 
 paul@850    869 
        populate the definition.
 
 paul@136    870 
        """
 
 paul@126    871 
 
 paul@850    872 
        origin = ref.get_origin()
 
 paul@850    873 
        pos = ref.has_kind("<class>") and encode_pos(encode_type_attribute(origin)) or str(self.instancepos)
 
 paul@850    874 
 
 paul@850    875 
        obj_type = ref.has_kind("<instance>") and encode_symbol("obj", origin) or "__obj"
 
 paul@850    876 
        obj_name = encode_path(structure_name)
 
 paul@850    877 
 
 paul@136    878 
        if f_decls:
 
 paul@850    879 
            print >>f_decls, "extern %s %s;\n" % (obj_type, obj_name)
 
 paul@132    880 
 
 paul@132    881 
        print >>f_defs, """\
 
 paul@850    882 
%s %s = {
 
 paul@132    883 
    &%s,
 
 paul@132    884 
    %s,
 
 paul@132    885 
    {
 
 paul@132    886 
        %s
 
 paul@850    887 
    },
 
 paul@850    888 
    %s
 
 paul@850    889 
    };
 
 paul@132    890 
""" % (
 
 paul@850    891 
            obj_type, obj_name,
 
 paul@850    892 
            table_name,
 
 paul@850    893 
            pos,
 
 paul@850    894 
            ",\n        ".join(structure),
 
 paul@850    895 
            trailing and ",\n    ".join(trailing) or "")
 
 paul@126    896 
 
 paul@132    897 
    def get_argument_limits(self, path):
 
 paul@126    898 
 
 paul@132    899 
        """
 
 paul@132    900 
        Return the argument minimum and maximum for the callable at 'path',
 
 paul@132    901 
        adding an argument position for a universal context.
 
 paul@132    902 
        """
 
 paul@132    903 
 
 paul@126    904 
        parameters = self.importer.function_parameters[path]
 
 paul@126    905 
        defaults = self.importer.function_defaults.get(path)
 
 paul@132    906 
        num_parameters = len(parameters) + 1
 
 paul@132    907 
        return num_parameters - (defaults and len(defaults) or 0), num_parameters
 
 paul@126    908 
 
 paul@126    909 
    def get_static_attributes(self, kind, name, attrnames):
 
 paul@126    910 
 
 paul@126    911 
        """
 
 paul@126    912 
        Return a mapping of attribute names to paths for attributes belonging
 
 paul@126    913 
        to objects of the given 'kind' (being "<class>" or "<module>") with
 
 paul@126    914 
        the given 'name' and supporting the given 'attrnames'.
 
 paul@126    915 
        """
 
 paul@126    916 
 
 paul@126    917 
        attrs = {}
 
 paul@126    918 
 
 paul@126    919 
        for attrname in attrnames:
 
 paul@126    920 
            if attrname is None:
 
 paul@126    921 
                continue
 
 paul@126    922 
            if kind == "<class>":
 
 paul@126    923 
                path = self.importer.all_class_attrs[name][attrname]
 
 paul@126    924 
            elif kind == "<module>":
 
 paul@126    925 
                path = "%s.%s" % (name, attrname)
 
 paul@126    926 
            else:
 
 paul@126    927 
                continue
 
 paul@126    928 
 
 paul@126    929 
            # The module may be hidden.
 
 paul@126    930 
 
 paul@126    931 
            attr = self.importer.get_object(path)
 
 paul@126    932 
            if not attr:
 
 paul@126    933 
                module = self.importer.hidden.get(path)
 
 paul@126    934 
                if module:
 
 paul@126    935 
                    attr = Reference(module.name, "<module>")
 
 paul@126    936 
            attrs[attrname] = attr
 
 paul@126    937 
 
 paul@126    938 
        return attrs
 
 paul@126    939 
 
 paul@126    940 
    def get_instance_attributes(self, name, attrnames):
 
 paul@126    941 
 
 paul@126    942 
        """
 
 paul@126    943 
        Return a mapping of attribute names to references for attributes
 
 paul@126    944 
        belonging to instances of the class with the given 'name', where the
 
 paul@126    945 
        given 'attrnames' are supported.
 
 paul@126    946 
        """
 
 paul@126    947 
 
 paul@126    948 
        consts = self.importer.all_instance_attr_constants[name]
 
 paul@126    949 
        attrs = {}
 
 paul@126    950 
        for attrname in attrnames:
 
 paul@126    951 
            if attrname is None:
 
 paul@126    952 
                continue
 
 paul@126    953 
            const = consts.get(attrname)
 
 paul@126    954 
            attrs[attrname] = const or Reference("<var>", "%s.%s" % (name, attrname))
 
 paul@850    955 
 
 paul@850    956 
        # Instances with trailing data.
 
 paul@850    957 
 
 paul@850    958 
        if name in self.trailing_data_types:
 
 paul@850    959 
            attrs["__trailing__"] = Reference("<var>", "%s.__trailing__" % name)
 
 paul@850    960 
 
 paul@126    961 
        return attrs
 
 paul@126    962 
 
 paul@357    963 
    def populate_table(self, path, table):
 
 paul@126    964 
 
 paul@126    965 
        """
 
 paul@126    966 
        Traverse the attributes in the determined order for the structure having
 
 paul@357    967 
        the given 'path', adding entries to the attribute 'table'.
 
 paul@126    968 
        """
 
 paul@126    969 
 
 paul@357    970 
        for attrname in self.optimiser.structures[path]:
 
 paul@126    971 
 
 paul@126    972 
            # Handle gaps in the structure.
 
 paul@126    973 
 
 paul@126    974 
            if attrname is None:
 
 paul@126    975 
                table.append("0")
 
 paul@126    976 
            else:
 
 paul@623    977 
                table.append(encode_code(attrname))
 
 paul@126    978 
 
 paul@357    979 
    def populate_parameter_table(self, parameters, table):
 
 paul@126    980 
 
 paul@126    981 
        """
 
 paul@357    982 
        Traverse the 'parameters' in the determined order, adding entries to the
 
 paul@357    983 
        attribute 'table'.
 
 paul@126    984 
        """
 
 paul@126    985 
 
 paul@357    986 
        for value in parameters:
 
 paul@126    987 
 
 paul@126    988 
            # Handle gaps in the structure.
 
 paul@126    989 
 
 paul@126    990 
            if value is None:
 
 paul@126    991 
                table.append(("0", "0"))
 
 paul@126    992 
            else:
 
 paul@126    993 
                name, pos = value
 
 paul@126    994 
                table.append((encode_symbol("pcode", name), pos))
 
 paul@126    995 
 
 paul@523    996 
    def populate_function(self, path, function_instance_attrs):
 
 paul@126    997 
 
 paul@126    998 
        """
 
 paul@126    999 
        Populate a structure for the function with the given 'path'. The given
 
 paul@523   1000 
        'attrs' provide the instance attributes.
 
 paul@126   1001 
        """
 
 paul@126   1002 
 
 paul@126   1003 
        structure = []
 
 paul@523   1004 
        self.populate_structure(Reference("<function>", path), function_instance_attrs, "<instance>", structure)
 
 paul@126   1005 
 
 paul@126   1006 
        # Append default members.
 
 paul@126   1007 
 
 paul@126   1008 
        self.append_defaults(path, structure)
 
 paul@126   1009 
        return structure
 
 paul@126   1010 
 
 paul@523   1011 
    def populate_structure(self, ref, attrs, kind, structure):
 
 paul@126   1012 
 
 paul@126   1013 
        """
 
 paul@126   1014 
        Traverse the attributes in the determined order for the structure having
 
 paul@126   1015 
        the given 'ref' whose members are provided by the 'attrs' mapping, in a
 
 paul@126   1016 
        structure of the given 'kind', adding entries to the object 'structure'.
 
 paul@126   1017 
        """
 
 paul@126   1018 
 
 paul@847   1019 
        structure_ref = self.get_target_structure(ref)
 
 paul@847   1020 
        origin = structure_ref.get_origin()
 
 paul@174   1021 
 
 paul@174   1022 
        for attrname in self.optimiser.structures[structure_ref]:
 
 paul@126   1023 
 
 paul@126   1024 
            # Handle gaps in the structure.
 
 paul@126   1025 
 
 paul@126   1026 
            if attrname is None:
 
 paul@477   1027 
                structure.append("__NULL")
 
 paul@126   1028 
 
 paul@126   1029 
            # Handle non-constant and constant members.
 
 paul@126   1030 
 
 paul@126   1031 
            else:
 
 paul@126   1032 
                attr = attrs[attrname]
 
 paul@126   1033 
 
 paul@136   1034 
                # Special function pointer member.
 
 paul@136   1035 
 
 paul@126   1036 
                if attrname == "__fn__":
 
 paul@126   1037 
 
 paul@523   1038 
                    # Classes offer instantiators which can be called without a
 
 paul@523   1039 
                    # context.
 
 paul@126   1040 
 
 paul@126   1041 
                    if kind == "<class>":
 
 paul@126   1042 
                        attr = encode_instantiator_pointer(attr)
 
 paul@126   1043 
                    else:
 
 paul@126   1044 
                        attr = encode_function_pointer(attr)
 
 paul@126   1045 
 
 paul@577   1046 
                    structure.append("{.fn=%s}" % attr)
 
 paul@126   1047 
                    continue
 
 paul@126   1048 
 
 paul@136   1049 
                # Special argument specification member.
 
 paul@136   1050 
 
 paul@126   1051 
                elif attrname == "__args__":
 
 paul@357   1052 
                    signature = self.get_signature_for_callable(ref.get_origin())
 
 paul@357   1053 
                    ptable = encode_tablename("<function>", signature)
 
 paul@357   1054 
 
 paul@579   1055 
                    structure.append("{.ptable=&%s}" % ptable)
 
 paul@126   1056 
                    continue
 
 paul@126   1057 
 
 paul@136   1058 
                # Special internal data member.
 
 paul@136   1059 
 
 paul@136   1060 
                elif attrname == "__data__":
 
 paul@569   1061 
                    structure.append("{.%s=%s}" % (
 
 paul@378   1062 
                                     encode_literal_constant_member(attr),
 
 paul@378   1063 
                                     encode_literal_constant_value(attr)))
 
 paul@136   1064 
                    continue
 
 paul@136   1065 
 
 paul@583   1066 
                # Special internal size member.
 
 paul@583   1067 
 
 paul@583   1068 
                elif attrname == "__size__":
 
 paul@974   1069 
                    structure.append("{.intvalue=__FROMINT(%d)}" % attr)
 
 paul@583   1070 
                    continue
 
 paul@583   1071 
 
 paul@360   1072 
                # Special internal key member.
 
 paul@360   1073 
 
 paul@360   1074 
                elif attrname == "__key__":
 
 paul@623   1075 
                    structure.append("{.code=%s, .pos=%s}" % (attr and encode_code(attr) or "0",
 
 paul@623   1076 
                                                              attr and encode_pos(attr) or "0"))
 
 paul@360   1077 
                    continue
 
 paul@360   1078 
 
 paul@251   1079 
                # Special cases.
 
 paul@251   1080 
 
 paul@499   1081 
                elif attrname in ("__file__", "__name__"):
 
 paul@251   1082 
                    path = ref.get_origin()
 
 paul@397   1083 
                    value_type = self.string_type
 
 paul@271   1084 
 
 paul@489   1085 
                    # Provide constant values. These must match the values
 
 paul@489   1086 
                    # originally recorded during inspection.
 
 paul@489   1087 
 
 paul@271   1088 
                    if attrname == "__file__":
 
 paul@271   1089 
                        module = self.importer.get_module(path)
 
 paul@271   1090 
                        value = module.filename
 
 paul@489   1091 
 
 paul@489   1092 
                    # Function and class names are leafnames.
 
 paul@489   1093 
 
 paul@499   1094 
                    elif attrname == "__name__" and not ref.has_kind("<module>"):
 
 paul@489   1095 
                        value = path.rsplit(".", 1)[-1]
 
 paul@489   1096 
 
 paul@489   1097 
                    # All other names just use the object path information.
 
 paul@489   1098 
 
 paul@271   1099 
                    else:
 
 paul@271   1100 
                        value = path
 
 paul@271   1101 
 
 paul@406   1102 
                    encoding = None
 
 paul@406   1103 
 
 paul@406   1104 
                    local_number = self.importer.all_constants[path][(value, value_type, encoding)]
 
 paul@251   1105 
                    constant_name = "$c%d" % local_number
 
 paul@251   1106 
                    attr_path = "%s.%s" % (path, constant_name)
 
 paul@251   1107 
                    constant_number = self.optimiser.constant_numbers[attr_path]
 
 paul@609   1108 
                    constant_value = "__const%s" % constant_number
 
 paul@251   1109 
                    structure.append("%s /* %s */" % (constant_value, attrname))
 
 paul@251   1110 
                    continue
 
 paul@251   1111 
 
 paul@499   1112 
                elif attrname == "__parent__":
 
 paul@499   1113 
                    path = ref.get_origin()
 
 paul@499   1114 
 
 paul@499   1115 
                    # Parents of classes and functions are derived from their
 
 paul@499   1116 
                    # object paths.
 
 paul@499   1117 
 
 paul@499   1118 
                    value = path.rsplit(".", 1)[0]
 
 paul@577   1119 
                    structure.append("{.value=&%s}" % encode_path(value))
 
 paul@577   1120 
                    continue
 
 paul@577   1121 
 
 paul@577   1122 
                # Special context member.
 
 paul@577   1123 
                # Set the context depending on the kind of attribute.
 
 paul@577   1124 
                # For methods:          <parent>
 
 paul@577   1125 
                # For other attributes: __NULL
 
 paul@577   1126 
 
 paul@577   1127 
                elif attrname == "__context__":
 
 paul@577   1128 
                    path = ref.get_origin()
 
 paul@577   1129 
 
 paul@577   1130 
                    # Contexts of methods are derived from their object paths.
 
 paul@577   1131 
 
 paul@577   1132 
                    context = "0"
 
 paul@577   1133 
 
 paul@577   1134 
                    if ref.get_kind() == "<function>":
 
 paul@577   1135 
                        parent = path.rsplit(".", 1)[0]
 
 paul@577   1136 
                        if self.importer.classes.has_key(parent):
 
 paul@577   1137 
                            context = "&%s" % encode_path(parent)
 
 paul@577   1138 
 
 paul@577   1139 
                    structure.append("{.value=%s}" % context)
 
 paul@499   1140 
                    continue
 
 paul@499   1141 
 
 paul@318   1142 
                # Special class relationship attributes.
 
 paul@318   1143 
 
 paul@318   1144 
                elif is_type_attribute(attrname):
 
 paul@577   1145 
                    structure.append("{.value=&%s}" % encode_path(decode_type_attribute(attrname)))
 
 paul@318   1146 
                    continue
 
 paul@318   1147 
 
 paul@406   1148 
                # All other kinds of members.
 
 paul@406   1149 
 
 paul@126   1150 
                structure.append(self.encode_member(origin, attrname, attr, kind))
 
 paul@126   1151 
 
 paul@850   1152 
    def populate_trailing(self, ref, attrs, trailing):
 
 paul@850   1153 
 
 paul@850   1154 
        """
 
 paul@850   1155 
        For the structure having the given 'ref', whose members are provided by
 
 paul@850   1156 
        the 'attrs' mapping, adding entries to the 'trailing' member collection.
 
 paul@850   1157 
        """
 
 paul@850   1158 
 
 paul@850   1159 
        structure_ref = self.get_target_structure(ref)
 
 paul@850   1160 
 
 paul@850   1161 
        # Instances with trailing data.
 
 paul@850   1162 
 
 paul@850   1163 
        if structure_ref.get_kind() == "<instance>" and \
 
 paul@850   1164 
           structure_ref.get_origin() in self.trailing_data_types:
 
 paul@850   1165 
            trailing.append(encode_literal_constant_value(attrs["__trailing__"]))
 
 paul@850   1166 
 
 paul@847   1167 
    def get_target_structure(self, ref):
 
 paul@847   1168 
 
 paul@847   1169 
        "Return the target structure type and reference for 'ref'."
 
 paul@847   1170 
 
 paul@847   1171 
        # Populate function instance structures for functions.
 
 paul@847   1172 
 
 paul@847   1173 
        if ref.has_kind("<function>"):
 
 paul@847   1174 
            return Reference("<instance>", self.function_type)
 
 paul@847   1175 
 
 paul@847   1176 
        # Otherwise, just populate the appropriate structures.
 
 paul@847   1177 
 
 paul@847   1178 
        else:
 
 paul@847   1179 
            return ref
 
 paul@847   1180 
 
 paul@126   1181 
    def encode_member(self, path, name, ref, structure_type):
 
 paul@126   1182 
 
 paul@126   1183 
        """
 
 paul@126   1184 
        Encode within the structure provided by 'path', the member whose 'name'
 
 paul@126   1185 
        provides 'ref', within the given 'structure_type'.
 
 paul@126   1186 
        """
 
 paul@126   1187 
 
 paul@126   1188 
        kind = ref.get_kind()
 
 paul@126   1189 
        origin = ref.get_origin()
 
 paul@126   1190 
 
 paul@126   1191 
        # References to constant literals.
 
 paul@126   1192 
 
 paul@338   1193 
        if kind == "<instance>" and ref.is_constant_alias():
 
 paul@338   1194 
            alias = ref.get_name()
 
 paul@126   1195 
 
 paul@406   1196 
            # Use the alias directly if appropriate.
 
 paul@406   1197 
 
 paul@406   1198 
            if alias.startswith("$c"):
 
 paul@609   1199 
                constant_value = encode_literal_constant(alias[2:])
 
 paul@406   1200 
                return "%s /* %s */" % (constant_value, name)
 
 paul@406   1201 
 
 paul@126   1202 
            # Obtain a constant value directly assigned to the attribute.
 
 paul@126   1203 
 
 paul@338   1204 
            if self.optimiser.constant_numbers.has_key(alias):
 
 paul@758   1205 
 
 paul@758   1206 
                # Encode integer constants differently.
 
 paul@758   1207 
 
 paul@758   1208 
                value, value_type, encoding = self.importer.all_constant_values[alias]
 
 paul@758   1209 
                if value_type == self.int_type:
 
 paul@758   1210 
                    return "__INTVALUE(%s) /* %s */" % (value, name)
 
 paul@758   1211 
 
 paul@338   1212 
                constant_number = self.optimiser.constant_numbers[alias]
 
 paul@406   1213 
                constant_value = encode_literal_constant(constant_number)
 
 paul@247   1214 
                return "%s /* %s */" % (constant_value, name)
 
 paul@126   1215 
 
 paul@400   1216 
        # Usage of predefined constants, currently only None supported.
 
 paul@400   1217 
 
 paul@400   1218 
        if kind == "<instance>" and origin == self.none_type:
 
 paul@400   1219 
            attr_path = encode_predefined_reference(self.none_value)
 
 paul@850   1220 
            return "{.value=(__ref) &%s} /* %s */" % (attr_path, name)
 
 paul@400   1221 
 
 paul@400   1222 
        # Predefined constant members.
 
 paul@136   1223 
 
 paul@136   1224 
        if (path, name) in self.predefined_constant_members:
 
 paul@136   1225 
            attr_path = encode_predefined_reference("%s.%s" % (path, name))
 
 paul@850   1226 
            return "{.value=(__ref) &%s} /* %s */" % (attr_path, name)
 
 paul@136   1227 
 
 paul@126   1228 
        # General undetermined members.
 
 paul@126   1229 
 
 paul@126   1230 
        if kind in ("<var>", "<instance>"):
 
 paul@404   1231 
            attr_path = encode_predefined_reference(self.none_value)
 
 paul@850   1232 
            return "{.value=(__ref) &%s} /* %s */" % (attr_path, name)
 
 paul@126   1233 
 
 paul@126   1234 
        else:
 
 paul@850   1235 
            return "{.value=(__ref) &%s}" % encode_path(origin)
 
 paul@126   1236 
 
 paul@126   1237 
    def append_defaults(self, path, structure):
 
 paul@126   1238 
 
 paul@126   1239 
        """
 
 paul@126   1240 
        For the given 'path', append default parameter members to the given
 
 paul@126   1241 
        'structure'.
 
 paul@126   1242 
        """
 
 paul@126   1243 
 
 paul@126   1244 
        for name, default in self.importer.function_defaults.get(path):
 
 paul@126   1245 
            structure.append(self.encode_member(path, name, default, "<instance>"))
 
 paul@126   1246 
 
 paul@159   1247 
    def write_instantiator(self, f_code, f_signatures, path, init_ref):
 
 paul@126   1248 
 
 paul@126   1249 
        """
 
 paul@159   1250 
        Write an instantiator to 'f_code', with a signature to 'f_signatures',
 
 paul@159   1251 
        for instances of the class with the given 'path', with 'init_ref' as the
 
 paul@159   1252 
        initialiser function reference.
 
 paul@126   1253 
 
 paul@126   1254 
        NOTE: This also needs to initialise any __fn__ and __args__ members
 
 paul@126   1255 
        NOTE: where __call__ is provided by the class.
 
 paul@126   1256 
        """
 
 paul@126   1257 
 
 paul@664   1258 
        initialiser = init_ref.get_origin()
 
 paul@669   1259 
        parameters = self.importer.function_parameters[initialiser]
 
 paul@664   1260 
        argmin, argmax = self.get_argument_limits(initialiser)
 
 paul@126   1261 
 
 paul@669   1262 
        l = []
 
 paul@669   1263 
        for name in parameters:
 
 paul@669   1264 
            l.append("__attr %s" % name)
 
 paul@126   1265 
 
 paul@929   1266 
        # Special-case the integer type.
 
 paul@929   1267 
 
 paul@932   1268 
        # Here, the __builtins__.int.new_int function is called with the
 
 paul@937   1269 
        # initialiser's parameters.
 
 paul@932   1270 
 
 paul@929   1271 
        if path == self.int_type:
 
 paul@929   1272 
            print >>f_code, """\
 
 paul@932   1273 
__attr %s(__attr __self, __attr number_or_string, __attr base)
 
 paul@929   1274 
{
 
 paul@932   1275 
    return __fn___builtins___int_new_int(__NULL, number_or_string, base);
 
 paul@929   1276 
}
 
 paul@929   1277 
""" % (
 
 paul@929   1278 
                encode_instantiator_pointer(path),
 
 paul@929   1279 
                )
 
 paul@929   1280 
 
 paul@938   1281 
        # Special-case the string types.
 
 paul@938   1282 
 
 paul@938   1283 
        # Here, the __builtins__.str.new_str function is called with the
 
 paul@938   1284 
        # initialiser's parameter.
 
 paul@938   1285 
 
 paul@938   1286 
        elif path == self.string_type:
 
 paul@938   1287 
            print >>f_code, """\
 
 paul@938   1288 
__attr %s(__attr __self, __attr obj)
 
 paul@938   1289 
{
 
 paul@938   1290 
    return __fn___builtins___str_new_str(__NULL, obj);
 
 paul@938   1291 
}
 
 paul@938   1292 
""" % (
 
 paul@938   1293 
                encode_instantiator_pointer(path),
 
 paul@938   1294 
                )
 
 paul@938   1295 
 
 paul@929   1296 
        # Generic instantiation support.
 
 paul@929   1297 
 
 paul@929   1298 
        else:
 
 paul@929   1299 
            print >>f_code, """\
 
 paul@669   1300 
__attr %s(__attr __self%s)
 
 paul@126   1301 
{
 
 paul@669   1302 
    return %s(__NEWINSTANCE(%s)%s);
 
 paul@126   1303 
}
 
 paul@126   1304 
""" % (
 
 paul@929   1305 
                encode_instantiator_pointer(path),
 
 paul@929   1306 
                l and ", %s" % ",".join(l) or "",
 
 paul@929   1307 
                encode_function_pointer(initialiser),
 
 paul@929   1308 
                encode_path(path),
 
 paul@929   1309 
                parameters and ", %s" % ", ".join(parameters) or ""
 
 paul@929   1310 
                )
 
 paul@669   1311 
 
 paul@669   1312 
        # Signature: __new_typename(__attr __self, ...)
 
 paul@669   1313 
 
 paul@669   1314 
        print >>f_signatures, "__attr %s(__attr __self%s);" % (
 
 paul@669   1315 
            encode_instantiator_pointer(path),
 
 paul@669   1316 
            l and ", %s" % ", ".join(l) or ""
 
 paul@669   1317 
            )
 
 paul@126   1318 
 
 paul@291   1319 
        print >>f_signatures, "#define __HAVE_%s" % encode_path(path)
 
 paul@159   1320 
 
 paul@146   1321 
    def write_main_program(self, f_code, f_signatures):
 
 paul@146   1322 
 
 paul@146   1323 
        """
 
 paul@146   1324 
        Write the main program to 'f_code', invoking the program's modules. Also
 
 paul@146   1325 
        write declarations for module main functions to 'f_signatures'.
 
 paul@146   1326 
        """
 
 paul@146   1327 
 
 paul@146   1328 
        print >>f_code, """\
 
 paul@146   1329 
int main(int argc, char *argv[])
 
 paul@159   1330 
{
 
 paul@190   1331 
    __exc __tmp_exc;
 
 paul@272   1332 
 
 paul@434   1333 
    GC_INIT();
 
 paul@434   1334 
 
 paul@872   1335 
    __signals_install_handlers();
 
 paul@872   1336 
 
 paul@159   1337 
    __Try
 
 paul@159   1338 
    {"""
 
 paul@146   1339 
 
 paul@186   1340 
        for name in self.importer.order_modules():
 
 paul@146   1341 
            function_name = "__main_%s" % encode_path(name)
 
 paul@146   1342 
            print >>f_signatures, "void %s();" % function_name
 
 paul@146   1343 
 
 paul@354   1344 
            # Omit the native modules.
 
 paul@146   1345 
 
 paul@354   1346 
            parts = name.split(".")
 
 paul@354   1347 
 
 paul@354   1348 
            if parts[0] != "native":
 
 paul@146   1349 
                print >>f_code, """\
 
 paul@165   1350 
        %s();""" % function_name
 
 paul@146   1351 
 
 paul@146   1352 
        print >>f_code, """\
 
 paul@159   1353 
    }
 
 paul@190   1354 
    __Catch(__tmp_exc)
 
 paul@159   1355 
    {
 
 paul@626   1356 
        if (__ISINSTANCE(__tmp_exc.arg, __ATTRVALUE(&__builtins___exception_system_SystemExit)))
 
 paul@758   1357 
            return __TOINT(__load_via_object(__VALUE(__tmp_exc.arg), value));
 
 paul@464   1358 
 
 paul@273   1359 
        fprintf(stderr, "Program terminated due to exception: %%s.\\n",
 
 paul@272   1360 
                __load_via_object(
 
 paul@763   1361 
                    __VALUE(%s(__NULL, __tmp_exc.arg)),
 
 paul@624   1362 
                    __data__).strvalue);
 
 paul@159   1363 
        return 1;
 
 paul@159   1364 
    }
 
 paul@477   1365 
 
 paul@477   1366 
    return 0;
 
 paul@146   1367 
}
 
 paul@938   1368 
""" % encode_instantiator_pointer("__builtins__.str.str")
 
 paul@146   1369 
 
 paul@126   1370 
# vim: tabstop=4 expandtab shiftwidth=4