Lichen

Annotated generator.py

627:05ad7964265c
628:5c8fd0afb2ec
626:650c24cf71f1
2017-02-27 Paul Boddie file changeset files shortlog Removed superfluous base classes from results.
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@510      6 
Copyright (C) 2015, 2016, 2017 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@283     28 
                     encode_literal_data_initialiser, \
 
 paul@159     29 
                     encode_literal_instantiator, encode_literal_reference, \
 
 paul@623     30 
                     encode_path, encode_pcode, encode_pos, encode_ppos, \
 
 paul@150     31 
                     encode_predefined_reference, encode_size, \
 
 paul@150     32 
                     encode_symbol, encode_tablename, \
 
 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@126     45 
    function_type = "__builtins__.core.function"
 
 paul@400     46 
    none_type = "__builtins__.none.NoneType"
 
 paul@360     47 
    string_type = "__builtins__.str.string"
 
 paul@274     48 
    type_type = "__builtins__.core.type"
 
 paul@400     49 
    unicode_type = "__builtins__.unicode.utf8string"
 
 paul@400     50 
 
 paul@400     51 
    none_value = "__builtins__.none.None"
 
 paul@158     52 
 
 paul@136     53 
    predefined_constant_members = (
 
 paul@158     54 
        ("__builtins__.boolean", "False"),
 
 paul@158     55 
        ("__builtins__.boolean", "True"),
 
 paul@136     56 
        ("__builtins__.none", "None"),
 
 paul@136     57 
        ("__builtins__.notimplemented", "NotImplemented"),
 
 paul@136     58 
        )
 
 paul@136     59 
 
 paul@283     60 
    literal_mapping_types = (
 
 paul@159     61 
        "__builtins__.dict.dict",
 
 paul@283     62 
        )
 
 paul@283     63 
 
 paul@283     64 
    literal_sequence_types = (
 
 paul@159     65 
        "__builtins__.list.list",
 
 paul@159     66 
        "__builtins__.tuple.tuple",
 
 paul@159     67 
        )
 
 paul@159     68 
 
 paul@283     69 
    literal_instantiator_types = literal_mapping_types + literal_sequence_types
 
 paul@283     70 
 
 paul@126     71 
    def __init__(self, importer, optimiser, output):
 
 paul@357     72 
 
 paul@357     73 
        """
 
 paul@357     74 
        Initialise the generator with the given 'importer', 'optimiser' and
 
 paul@357     75 
        'output' directory.
 
 paul@357     76 
        """
 
 paul@357     77 
 
 paul@126     78 
        self.importer = importer
 
 paul@126     79 
        self.optimiser = optimiser
 
 paul@126     80 
        self.output = output
 
 paul@126     81 
 
 paul@614     82 
    def to_output(self, debug=False, gc_sections=False):
 
 paul@126     83 
 
 paul@126     84 
        "Write the generated code."
 
 paul@126     85 
 
 paul@617     86 
        self.check_output("debug=%r gc_sections=%r" % (debug, gc_sections))
 
 paul@126     87 
        self.write_structures()
 
 paul@614     88 
        self.write_scripts(debug, gc_sections)
 
 paul@511     89 
        self.copy_templates()
 
 paul@126     90 
 
 paul@511     91 
    def copy_templates(self):
 
 paul@126     92 
 
 paul@126     93 
        "Copy template files to the generated output directory."
 
 paul@126     94 
 
 paul@126     95 
        templates = join(split(__file__)[0], "templates")
 
 paul@126     96 
 
 paul@126     97 
        for filename in listdir(templates):
 
 paul@183     98 
            target = self.output
 
 paul@354     99 
            pathname = join(templates, filename)
 
 paul@354    100 
 
 paul@354    101 
            # Copy files into the target directory.
 
 paul@354    102 
 
 paul@354    103 
            if not isdir(pathname):
 
 paul@354    104 
                copy(pathname, target)
 
 paul@354    105 
 
 paul@354    106 
            # Copy directories (such as the native code directory).
 
 paul@354    107 
 
 paul@354    108 
            else:
 
 paul@354    109 
                target = join(self.output, filename)
 
 paul@354    110 
 
 paul@354    111 
                if not exists(target):
 
 paul@354    112 
                    mkdir(target)
 
 paul@354    113 
 
 paul@609    114 
                existing = listdir(target)
 
 paul@609    115 
                needed = listdir(pathname)
 
 paul@609    116 
 
 paul@609    117 
                # Determine which files are superfluous by comparing their
 
 paul@609    118 
                # basenames (without extensions) to those of the needed
 
 paul@609    119 
                # filenames. This should preserve object files for needed source
 
 paul@609    120 
                # files, only discarding completely superfluous files from the
 
 paul@609    121 
                # target directory.
 
 paul@609    122 
 
 paul@609    123 
                needed_basenames = set()
 
 paul@609    124 
                for filename in needed:
 
 paul@609    125 
                    needed_basenames.add(splitext(filename)[0])
 
 paul@609    126 
 
 paul@609    127 
                superfluous = []
 
 paul@609    128 
                for filename in existing:
 
 paul@609    129 
                    if splitext(filename)[0] not in needed_basenames:
 
 paul@609    130 
                        superfluous.append(filename)
 
 paul@609    131 
 
 paul@609    132 
                # Copy needed files.
 
 paul@609    133 
 
 paul@609    134 
                for filename in needed:
 
 paul@354    135 
                    copy(join(pathname, filename), target)
 
 paul@126    136 
 
 paul@609    137 
                # Remove superfluous files.
 
 paul@609    138 
 
 paul@609    139 
                for filename in superfluous:
 
 paul@609    140 
                    remove(join(target, filename))
 
 paul@609    141 
 
 paul@126    142 
    def write_structures(self):
 
 paul@126    143 
 
 paul@126    144 
        "Write structures used by the program."
 
 paul@126    145 
 
 paul@126    146 
        f_consts = open(join(self.output, "progconsts.h"), "w")
 
 paul@126    147 
        f_defs = open(join(self.output, "progtypes.c"), "w")
 
 paul@126    148 
        f_decls = open(join(self.output, "progtypes.h"), "w")
 
 paul@126    149 
        f_signatures = open(join(self.output, "main.h"), "w")
 
 paul@126    150 
        f_code = open(join(self.output, "main.c"), "w")
 
 paul@126    151 
 
 paul@126    152 
        try:
 
 paul@126    153 
            # Output boilerplate.
 
 paul@126    154 
 
 paul@126    155 
            print >>f_consts, """\
 
 paul@126    156 
#ifndef __PROGCONSTS_H__
 
 paul@126    157 
#define __PROGCONSTS_H__
 
 paul@623    158 
 
 paul@623    159 
#include "types.h"
 
 paul@126    160 
"""
 
 paul@126    161 
            print >>f_decls, """\
 
 paul@126    162 
#ifndef __PROGTYPES_H__
 
 paul@126    163 
#define __PROGTYPES_H__
 
 paul@126    164 
 
 paul@126    165 
#include "progconsts.h"
 
 paul@126    166 
#include "types.h"
 
 paul@126    167 
"""
 
 paul@126    168 
            print >>f_defs, """\
 
 paul@126    169 
#include "progtypes.h"
 
 paul@132    170 
#include "progops.h"
 
 paul@126    171 
#include "main.h"
 
 paul@126    172 
"""
 
 paul@126    173 
            print >>f_signatures, """\
 
 paul@126    174 
#ifndef __MAIN_H__
 
 paul@126    175 
#define __MAIN_H__
 
 paul@126    176 
 
 paul@126    177 
#include "types.h"
 
 paul@126    178 
"""
 
 paul@126    179 
            print >>f_code, """\
 
 paul@126    180 
#include <string.h>
 
 paul@159    181 
#include <stdio.h>
 
 paul@434    182 
#include "gc.h"
 
 paul@126    183 
#include "types.h"
 
 paul@159    184 
#include "exceptions.h"
 
 paul@126    185 
#include "ops.h"
 
 paul@126    186 
#include "progconsts.h"
 
 paul@126    187 
#include "progtypes.h"
 
 paul@490    188 
#include "main.h"
 
 paul@126    189 
#include "progops.h"
 
 paul@126    190 
"""
 
 paul@126    191 
 
 paul@126    192 
            # Generate table and structure data.
 
 paul@126    193 
 
 paul@126    194 
            function_instance_attrs = None
 
 paul@126    195 
            objects = self.optimiser.attr_table.items()
 
 paul@126    196 
            objects.sort()
 
 paul@126    197 
 
 paul@357    198 
            self.callables = {}
 
 paul@357    199 
 
 paul@126    200 
            for ref, indexes in objects:
 
 paul@126    201 
                attrnames = self.get_attribute_names(indexes)
 
 paul@126    202 
 
 paul@126    203 
                kind = ref.get_kind()
 
 paul@126    204 
                path = ref.get_origin()
 
 paul@150    205 
                table_name = encode_tablename(kind, path)
 
 paul@150    206 
                structure_size = encode_size(kind, path)
 
 paul@126    207 
 
 paul@126    208 
                # Generate structures for classes and modules.
 
 paul@126    209 
 
 paul@126    210 
                if kind != "<instance>":
 
 paul@126    211 
                    structure = []
 
 paul@126    212 
                    attrs = self.get_static_attributes(kind, path, attrnames)
 
 paul@126    213 
 
 paul@126    214 
                    # Set a special instantiator on the class.
 
 paul@126    215 
 
 paul@126    216 
                    if kind == "<class>":
 
 paul@126    217 
 
 paul@126    218 
                        # Write instantiator declarations based on the
 
 paul@126    219 
                        # applicable initialiser.
 
 paul@126    220 
 
 paul@126    221 
                        init_ref = attrs["__init__"]
 
 paul@126    222 
 
 paul@126    223 
                        # Write instantiator definitions.
 
 paul@126    224 
 
 paul@159    225 
                        self.write_instantiator(f_code, f_signatures, path, init_ref)
 
 paul@126    226 
 
 paul@357    227 
                        # Record the callable for parameter table generation.
 
 paul@357    228 
 
 paul@357    229 
                        self.callables[path] = init_ref.get_origin()
 
 paul@126    230 
 
 paul@357    231 
                        # Define special attributes.
 
 paul@357    232 
 
 paul@357    233 
                        attrs["__fn__"] = path
 
 paul@579    234 
                        attrs["__args__"] = path
 
 paul@126    235 
 
 paul@126    236 
                    self.populate_structure(Reference(kind, path), attrs, kind, structure)
 
 paul@136    237 
 
 paul@136    238 
                    if kind == "<class>":
 
 paul@136    239 
                        self.write_instance_structure(f_decls, path, structure_size)
 
 paul@136    240 
 
 paul@211    241 
                    self.write_structure(f_decls, f_defs, path, table_name, structure,
 
 paul@136    242 
                        kind == "<class>" and path)
 
 paul@126    243 
 
 paul@126    244 
                # Record function instance details for function generation below.
 
 paul@126    245 
 
 paul@126    246 
                else:
 
 paul@126    247 
                    attrs = self.get_instance_attributes(path, attrnames)
 
 paul@126    248 
                    if path == self.function_type:
 
 paul@126    249 
                        function_instance_attrs = attrs
 
 paul@126    250 
 
 paul@357    251 
                        # Record the callable for parameter table generation.
 
 paul@357    252 
 
 paul@357    253 
                        self.callables[path] = path
 
 paul@357    254 
 
 paul@126    255 
                # Write a table for all objects.
 
 paul@126    256 
 
 paul@126    257 
                table = []
 
 paul@126    258 
                self.populate_table(Reference(kind, path), table)
 
 paul@126    259 
                self.write_table(f_decls, f_defs, table_name, structure_size, table)
 
 paul@126    260 
 
 paul@126    261 
            # Generate function instances.
 
 paul@126    262 
 
 paul@195    263 
            functions = self.importer.function_parameters.keys()
 
 paul@126    264 
            functions.sort()
 
 paul@211    265 
            extra_function_instances = []
 
 paul@126    266 
 
 paul@126    267 
            for path in functions:
 
 paul@195    268 
 
 paul@195    269 
                # Instantiators are generated above.
 
 paul@195    270 
 
 paul@195    271 
                if self.importer.classes.has_key(path) or not self.importer.get_object(path):
 
 paul@195    272 
                    continue
 
 paul@195    273 
 
 paul@357    274 
                # Record the callable for parameter table generation.
 
 paul@357    275 
 
 paul@357    276 
                self.callables[path] = path
 
 paul@357    277 
 
 paul@357    278 
                # Define the structure details.
 
 paul@357    279 
 
 paul@126    280 
                cls = self.function_type
 
 paul@150    281 
                table_name = encode_tablename("<instance>", cls)
 
 paul@211    282 
                structure_size = encode_size("<instance>", path)
 
 paul@126    283 
 
 paul@126    284 
                # Set a special callable attribute on the instance.
 
 paul@126    285 
 
 paul@126    286 
                function_instance_attrs["__fn__"] = path
 
 paul@579    287 
                function_instance_attrs["__args__"] = path
 
 paul@126    288 
 
 paul@575    289 
                structure = self.populate_function(path, function_instance_attrs)
 
 paul@575    290 
                self.write_structure(f_decls, f_defs, path, table_name, structure)
 
 paul@126    291 
 
 paul@154    292 
                # Functions with defaults need to declare instance structures.
 
 paul@154    293 
 
 paul@154    294 
                if self.importer.function_defaults.get(path):
 
 paul@154    295 
                    self.write_instance_structure(f_decls, path, structure_size)
 
 paul@211    296 
                    extra_function_instances.append(path)
 
 paul@154    297 
 
 paul@126    298 
                # Write function declarations.
 
 paul@126    299 
                # Signature: __attr <name>(__attr[]);
 
 paul@126    300 
 
 paul@126    301 
                print >>f_signatures, "__attr %s(__attr args[]);" % encode_function_pointer(path)
 
 paul@126    302 
 
 paul@579    303 
            # Generate parameter table size data.
 
 paul@579    304 
 
 paul@579    305 
            min_parameters = {}
 
 paul@579    306 
            max_parameters = {}
 
 paul@579    307 
            size_parameters = {}
 
 paul@579    308 
 
 paul@357    309 
            # Consolidate parameter tables for instantiators and functions.
 
 paul@357    310 
 
 paul@357    311 
            parameter_tables = set()
 
 paul@126    312 
 
 paul@357    313 
            for path, function_path in self.callables.items():
 
 paul@579    314 
                argmin, argmax = self.get_argument_limits(function_path)
 
 paul@579    315 
 
 paul@579    316 
                # Obtain the parameter table members.
 
 paul@579    317 
 
 paul@357    318 
                parameters = self.optimiser.parameters[function_path]
 
 paul@357    319 
                if not parameters:
 
 paul@357    320 
                    parameters = ()
 
 paul@357    321 
                else:
 
 paul@357    322 
                    parameters = tuple(parameters)
 
 paul@579    323 
 
 paul@579    324 
                # Define each table in terms of the members and the minimum
 
 paul@579    325 
                # number of arguments.
 
 paul@579    326 
 
 paul@579    327 
                parameter_tables.add((argmin, parameters))
 
 paul@579    328 
                signature = self.get_parameter_signature(argmin, parameters)
 
 paul@579    329 
 
 paul@579    330 
                # Record the minimum number of arguments, the maximum number,
 
 paul@579    331 
                # and the size of the table.
 
 paul@579    332 
 
 paul@579    333 
                min_parameters[signature] = argmin
 
 paul@579    334 
                max_parameters[signature] = argmax
 
 paul@579    335 
                size_parameters[signature] = len(parameters)
 
 paul@579    336 
 
 paul@579    337 
            self.write_size_constants(f_consts, "pmin", min_parameters, 0)
 
 paul@579    338 
            self.write_size_constants(f_consts, "pmax", max_parameters, 0)
 
 paul@579    339 
            self.write_size_constants(f_consts, "psize", size_parameters, 0)
 
 paul@357    340 
 
 paul@357    341 
            # Generate parameter tables for distinct function signatures.
 
 paul@357    342 
 
 paul@579    343 
            for argmin, parameters in parameter_tables:
 
 paul@579    344 
                self.make_parameter_table(f_decls, f_defs, argmin, parameters)
 
 paul@126    345 
 
 paul@136    346 
            # Generate predefined constants.
 
 paul@136    347 
 
 paul@136    348 
            for path, name in self.predefined_constant_members:
 
 paul@136    349 
                self.make_predefined_constant(f_decls, f_defs, path, name)
 
 paul@136    350 
 
 paul@136    351 
            # Generate literal constants.
 
 paul@136    352 
 
 paul@397    353 
            for constant, n in self.optimiser.constants.items():
 
 paul@397    354 
                self.make_literal_constant(f_decls, f_defs, n, constant)
 
 paul@136    355 
 
 paul@146    356 
            # Finish the main source file.
 
 paul@146    357 
 
 paul@146    358 
            self.write_main_program(f_code, f_signatures)
 
 paul@146    359 
 
 paul@211    360 
            # Record size information for certain function instances as well as
 
 paul@211    361 
            # for classes, modules and other instances.
 
 paul@211    362 
 
 paul@211    363 
            size_tables = {}
 
 paul@211    364 
 
 paul@211    365 
            for kind in ["<class>", "<module>", "<instance>"]:
 
 paul@211    366 
                size_tables[kind] = {}
 
 paul@211    367 
 
 paul@211    368 
            # Generate structure size data.
 
 paul@211    369 
 
 paul@211    370 
            for ref, structure in self.optimiser.structures.items():
 
 paul@211    371 
                size_tables[ref.get_kind()][ref.get_origin()] = len(structure)
 
 paul@211    372 
 
 paul@211    373 
            for path in extra_function_instances:
 
 paul@211    374 
                defaults = self.importer.function_defaults[path]
 
 paul@211    375 
                size_tables["<instance>"][path] = size_tables["<instance>"][self.function_type] + len(defaults)
 
 paul@211    376 
 
 paul@211    377 
            size_tables = size_tables.items()
 
 paul@211    378 
            size_tables.sort()
 
 paul@211    379 
 
 paul@211    380 
            for kind, sizes in size_tables:
 
 paul@211    381 
                self.write_size_constants(f_consts, kind, sizes, 0)
 
 paul@211    382 
 
 paul@211    383 
            # Generate parameter codes.
 
 paul@211    384 
 
 paul@623    385 
            self.write_code_constants(f_consts, self.optimiser.all_paramnames,
 
 paul@623    386 
                                      self.optimiser.arg_locations,
 
 paul@623    387 
                                      "pcode", "ppos", encode_pcode, encode_ppos)
 
 paul@211    388 
 
 paul@211    389 
            # Generate attribute codes.
 
 paul@211    390 
 
 paul@623    391 
            self.write_code_constants(f_consts, self.optimiser.all_attrnames,
 
 paul@623    392 
                                      self.optimiser.locations,
 
 paul@623    393 
                                      "code", "pos", encode_code, encode_pos)
 
 paul@211    394 
 
 paul@126    395 
            # Output more boilerplate.
 
 paul@126    396 
 
 paul@126    397 
            print >>f_consts, """\
 
 paul@126    398 
 
 paul@126    399 
#endif /* __PROGCONSTS_H__ */"""
 
 paul@126    400 
 
 paul@126    401 
            print >>f_decls, """\
 
 paul@126    402 
 
 paul@126    403 
#define __FUNCTION_TYPE %s
 
 paul@126    404 
#define __FUNCTION_INSTANCE_SIZE %s
 
 paul@274    405 
#define __TYPE_CLASS_TYPE %s
 
 paul@274    406 
#define __TYPE_CLASS_POS %s
 
 paul@274    407 
#define __TYPE_CLASS_CODE %s
 
 paul@126    408 
 
 paul@126    409 
#endif /* __PROGTYPES_H__ */""" % (
 
 paul@126    410 
    encode_path(self.function_type),
 
 paul@233    411 
    encode_size("<instance>", self.function_type),
 
 paul@274    412 
    encode_path(self.type_type),
 
 paul@623    413 
    encode_pos(encode_type_attribute(self.type_type)),
 
 paul@623    414 
    encode_code(encode_type_attribute(self.type_type)),
 
 paul@126    415 
    )
 
 paul@126    416 
 
 paul@126    417 
            print >>f_signatures, """\
 
 paul@126    418 
 
 paul@126    419 
#endif /* __MAIN_H__ */"""
 
 paul@126    420 
 
 paul@126    421 
        finally:
 
 paul@126    422 
            f_consts.close()
 
 paul@126    423 
            f_defs.close()
 
 paul@126    424 
            f_decls.close()
 
 paul@126    425 
            f_signatures.close()
 
 paul@126    426 
            f_code.close()
 
 paul@126    427 
 
 paul@614    428 
    def write_scripts(self, debug, gc_sections):
 
 paul@511    429 
 
 paul@511    430 
        "Write scripts used to build the program."
 
 paul@511    431 
 
 paul@511    432 
        f_native = open(join(self.output, "native.mk"), "w")
 
 paul@539    433 
        f_modules = open(join(self.output, "modules.mk"), "w")
 
 paul@511    434 
        f_options = open(join(self.output, "options.mk"), "w")
 
 paul@511    435 
        try:
 
 paul@511    436 
            if debug:
 
 paul@511    437 
                print >>f_options, "CFLAGS = -g"
 
 paul@511    438 
 
 paul@614    439 
            if gc_sections:
 
 paul@614    440 
                print >>f_options, "include gc_sections.mk"
 
 paul@614    441 
 
 paul@539    442 
            # Identify modules used by the program.
 
 paul@511    443 
 
 paul@539    444 
            native_modules = [join("native", "common.c")]
 
 paul@539    445 
            modules = []
 
 paul@511    446 
 
 paul@511    447 
            for name in self.importer.modules.keys():
 
 paul@511    448 
                parts = name.split(".", 1)
 
 paul@511    449 
 
 paul@511    450 
                # Identify source files to be built.
 
 paul@511    451 
 
 paul@511    452 
                if parts[0] == "native":
 
 paul@539    453 
                    native_modules.append(join("native", "%s.c" % parts[1]))
 
 paul@539    454 
                else:
 
 paul@539    455 
                    modules.append(join("src", "%s.c" % name))
 
 paul@511    456 
 
 paul@511    457 
            print >>f_native, "SRC =", " ".join(native_modules)
 
 paul@539    458 
            print >>f_modules, "SRC +=", " ".join(modules)
 
 paul@511    459 
 
 paul@511    460 
        finally:
 
 paul@511    461 
            f_native.close()
 
 paul@539    462 
            f_modules.close()
 
 paul@511    463 
            f_options.close()
 
 paul@511    464 
 
 paul@397    465 
    def make_literal_constant(self, f_decls, f_defs, n, constant):
 
 paul@136    466 
 
 paul@136    467 
        """
 
 paul@136    468 
        Write literal constant details to 'f_decls' (to declare a structure) and
 
 paul@136    469 
        to 'f_defs' (to define the contents) for the constant with the number
 
 paul@397    470 
        'n' with the given 'constant'.
 
 paul@136    471 
        """
 
 paul@136    472 
 
 paul@406    473 
        value, value_type, encoding = constant
 
 paul@397    474 
 
 paul@136    475 
        const_path = encode_literal_constant(n)
 
 paul@136    476 
        structure_name = encode_literal_reference(n)
 
 paul@136    477 
 
 paul@397    478 
        ref = Reference("<instance>", value_type)
 
 paul@406    479 
        self.make_constant(f_decls, f_defs, ref, const_path, structure_name, value, encoding)
 
 paul@136    480 
 
 paul@136    481 
    def make_predefined_constant(self, f_decls, f_defs, path, name):
 
 paul@136    482 
 
 paul@136    483 
        """
 
 paul@136    484 
        Write predefined constant details to 'f_decls' (to declare a structure)
 
 paul@136    485 
        and to 'f_defs' (to define the contents) for the constant located in
 
 paul@136    486 
        'path' with the given 'name'.
 
 paul@136    487 
        """
 
 paul@136    488 
 
 paul@136    489 
        # Determine the details of the constant.
 
 paul@136    490 
 
 paul@136    491 
        attr_path = "%s.%s" % (path, name)
 
 paul@136    492 
        structure_name = encode_predefined_reference(attr_path)
 
 paul@136    493 
        ref = self.importer.get_object(attr_path)
 
 paul@136    494 
 
 paul@136    495 
        self.make_constant(f_decls, f_defs, ref, attr_path, structure_name)
 
 paul@136    496 
 
 paul@406    497 
    def make_constant(self, f_decls, f_defs, ref, const_path, structure_name, data=None, encoding=None):
 
 paul@136    498 
 
 paul@136    499 
        """
 
 paul@136    500 
        Write constant details to 'f_decls' (to declare a structure) and to
 
 paul@136    501 
        'f_defs' (to define the contents) for the constant described by 'ref'
 
 paul@136    502 
        having the given 'path' and 'structure_name' (for the constant structure
 
 paul@136    503 
        itself).
 
 paul@406    504 
 
 paul@406    505 
        The additional 'data' and 'encoding' are used to describe specific
 
 paul@406    506 
        values.
 
 paul@136    507 
        """
 
 paul@136    508 
 
 paul@136    509 
        # Obtain the attributes.
 
 paul@136    510 
 
 paul@136    511 
        cls = ref.get_origin()
 
 paul@136    512 
        indexes = self.optimiser.attr_table[ref]
 
 paul@136    513 
        attrnames = self.get_attribute_names(indexes)
 
 paul@136    514 
        attrs = self.get_instance_attributes(cls, attrnames)
 
 paul@136    515 
 
 paul@136    516 
        # Set the data, if provided.
 
 paul@136    517 
 
 paul@136    518 
        if data is not None:
 
 paul@136    519 
            attrs["__data__"] = data
 
 paul@136    520 
 
 paul@360    521 
            # Also set a key for dynamic attribute lookup, if a string.
 
 paul@360    522 
 
 paul@397    523 
            if attrs.has_key("__key__"):
 
 paul@360    524 
                if data in self.optimiser.all_attrnames:
 
 paul@360    525 
                    attrs["__key__"] = data
 
 paul@360    526 
                else:
 
 paul@360    527 
                    attrs["__key__"] = None
 
 paul@360    528 
 
 paul@583    529 
            # Initialise the size, if a string.
 
 paul@583    530 
 
 paul@583    531 
            if attrs.has_key("__size__"):
 
 paul@583    532 
                attrs["__size__"] = len(data)
 
 paul@583    533 
 
 paul@400    534 
        # Define Unicode constant encoding details.
 
 paul@400    535 
 
 paul@400    536 
        if cls == self.unicode_type:
 
 paul@406    537 
 
 paul@406    538 
            # Reference the encoding's own constant value.
 
 paul@406    539 
 
 paul@406    540 
            if encoding:
 
 paul@406    541 
                n = self.optimiser.constants[(encoding, self.string_type, None)]
 
 paul@406    542 
 
 paul@406    543 
                # Employ a special alias that will be tested specifically in
 
 paul@406    544 
                # encode_member.
 
 paul@406    545 
 
 paul@609    546 
                encoding_ref = Reference("<instance>", self.string_type, "$c%s" % n)
 
 paul@406    547 
 
 paul@406    548 
            # Use None where no encoding was indicated.
 
 paul@406    549 
 
 paul@406    550 
            else:
 
 paul@406    551 
                encoding_ref = Reference("<instance>", self.none_type)
 
 paul@406    552 
 
 paul@406    553 
            attrs["encoding"] = encoding_ref
 
 paul@400    554 
 
 paul@136    555 
        # Define the structure details. An object is created for the constant,
 
 paul@136    556 
        # but an attribute is provided, referring to the object, for access to
 
 paul@136    557 
        # the constant in the program.
 
 paul@136    558 
 
 paul@136    559 
        structure = []
 
 paul@150    560 
        table_name = encode_tablename("<instance>", cls)
 
 paul@136    561 
        self.populate_structure(ref, attrs, ref.get_kind(), structure)
 
 paul@211    562 
        self.write_structure(f_decls, f_defs, structure_name, table_name, structure)
 
 paul@136    563 
 
 paul@136    564 
        # Define a macro for the constant.
 
 paul@136    565 
 
 paul@136    566 
        attr_name = encode_path(const_path)
 
 paul@626    567 
        print >>f_decls, "#define %s __ATTRVALUE(&%s)" % (attr_name, structure_name)
 
 paul@136    568 
 
 paul@579    569 
    def make_parameter_table(self, f_decls, f_defs, argmin, parameters):
 
 paul@126    570 
 
 paul@126    571 
        """
 
 paul@126    572 
        Write parameter table details to 'f_decls' (to declare a table) and to
 
 paul@579    573 
        'f_defs' (to define the contents) for the given 'argmin' and
 
 paul@579    574 
        'parameters'.
 
 paul@126    575 
        """
 
 paul@126    576 
 
 paul@357    577 
        # Use a signature for the table name instead of a separate name for each
 
 paul@357    578 
        # function.
 
 paul@357    579 
 
 paul@579    580 
        signature = self.get_parameter_signature(argmin, parameters)
 
 paul@357    581 
        table_name = encode_tablename("<function>", signature)
 
 paul@579    582 
        min_parameters = encode_size("pmin", signature)
 
 paul@579    583 
        max_parameters = encode_size("pmax", signature)
 
 paul@579    584 
        structure_size = encode_size("psize", signature)
 
 paul@357    585 
 
 paul@126    586 
        table = []
 
 paul@357    587 
        self.populate_parameter_table(parameters, table)
 
 paul@579    588 
        self.write_parameter_table(f_decls, f_defs, table_name, min_parameters, max_parameters, structure_size, table)
 
 paul@126    589 
 
 paul@579    590 
    def get_parameter_signature(self, argmin, parameters):
 
 paul@357    591 
 
 paul@579    592 
        "Return a signature for the given 'argmin' and 'parameters'."
 
 paul@357    593 
 
 paul@579    594 
        l = [str(argmin)]
 
 paul@357    595 
        for parameter in parameters:
 
 paul@357    596 
            if parameter is None:
 
 paul@357    597 
                l.append("")
 
 paul@357    598 
            else:
 
 paul@357    599 
                name, pos = parameter
 
 paul@361    600 
                l.append("%s_%s" % (name, pos))
 
 paul@357    601 
        return l and "__".join(l) or "__void"
 
 paul@357    602 
 
 paul@357    603 
    def get_signature_for_callable(self, path):
 
 paul@357    604 
 
 paul@357    605 
        "Return the signature for the callable with the given 'path'."
 
 paul@357    606 
 
 paul@357    607 
        function_path = self.callables[path]
 
 paul@579    608 
        argmin, argmax = self.get_argument_limits(function_path)
 
 paul@357    609 
        parameters = self.optimiser.parameters[function_path]
 
 paul@579    610 
        return self.get_parameter_signature(argmin, parameters)
 
 paul@357    611 
 
 paul@126    612 
    def write_size_constants(self, f_consts, size_prefix, sizes, padding):
 
 paul@126    613 
 
 paul@126    614 
        """
 
 paul@126    615 
        Write size constants to 'f_consts' for the given 'size_prefix', using
 
 paul@126    616 
        the 'sizes' dictionary to populate the definition, adding the given
 
 paul@126    617 
        'padding' to the basic sizes.
 
 paul@126    618 
        """
 
 paul@126    619 
 
 paul@126    620 
        print >>f_consts, "enum %s {" % encode_size(size_prefix)
 
 paul@126    621 
        first = True
 
 paul@126    622 
        for path, size in sizes.items():
 
 paul@126    623 
            if not first:
 
 paul@126    624 
                print >>f_consts, ","
 
 paul@126    625 
            else:
 
 paul@126    626 
                first = False
 
 paul@126    627 
            f_consts.write("    %s = %d" % (encode_size(size_prefix, path), size + padding))
 
 paul@126    628 
        print >>f_consts, "\n    };"
 
 paul@126    629 
 
 paul@623    630 
    def write_code_constants(self, f_consts, attrnames, locations, code_prefix,
 
 paul@623    631 
                             pos_prefix, code_encoder, pos_encoder):
 
 paul@126    632 
 
 paul@126    633 
        """
 
 paul@126    634 
        Write code constants to 'f_consts' for the given 'attrnames' and
 
 paul@126    635 
        attribute 'locations'.
 
 paul@126    636 
        """
 
 paul@126    637 
 
 paul@132    638 
        print >>f_consts, "enum %s {" % encode_symbol(code_prefix)
 
 paul@126    639 
        first = True
 
 paul@126    640 
        for i, attrname in enumerate(attrnames):
 
 paul@126    641 
            if not first:
 
 paul@126    642 
                print >>f_consts, ","
 
 paul@126    643 
            else:
 
 paul@126    644 
                first = False
 
 paul@623    645 
            f_consts.write("    %s = %d" % (code_encoder(attrname), i))
 
 paul@126    646 
        print >>f_consts, "\n    };"
 
 paul@126    647 
 
 paul@132    648 
        print >>f_consts, "enum %s {" % encode_symbol(pos_prefix)
 
 paul@126    649 
        first = True
 
 paul@126    650 
        for i, attrnames in enumerate(locations):
 
 paul@126    651 
            for attrname in attrnames:
 
 paul@126    652 
                if not first:
 
 paul@126    653 
                    print >>f_consts, ","
 
 paul@126    654 
                else:
 
 paul@126    655 
                    first = False
 
 paul@623    656 
                f_consts.write("    %s = %d" % (pos_encoder(attrname), i))
 
 paul@126    657 
        print >>f_consts, "\n    };"
 
 paul@126    658 
 
 paul@126    659 
    def write_table(self, f_decls, f_defs, table_name, structure_size, table):
 
 paul@126    660 
 
 paul@126    661 
        """
 
 paul@126    662 
        Write the declarations to 'f_decls' and definitions to 'f_defs' for
 
 paul@126    663 
        the object having the given 'table_name' and the given 'structure_size',
 
 paul@126    664 
        with 'table' details used to populate the definition.
 
 paul@126    665 
        """
 
 paul@126    666 
 
 paul@126    667 
        print >>f_decls, "extern const __table %s;\n" % table_name
 
 paul@126    668 
 
 paul@126    669 
        # Write the corresponding definition.
 
 paul@126    670 
 
 paul@570    671 
        print >>f_defs, """\
 
 paul@570    672 
const __table %s = {
 
 paul@570    673 
    %s,
 
 paul@570    674 
    {
 
 paul@570    675 
        %s
 
 paul@570    676 
    }
 
 paul@570    677 
};
 
 paul@579    678 
""" % (table_name, structure_size,
 
 paul@579    679 
       ",\n        ".join(table))
 
 paul@126    680 
 
 paul@579    681 
    def write_parameter_table(self, f_decls, f_defs, table_name, min_parameters,
 
 paul@579    682 
                              max_parameters, structure_size, table):
 
 paul@126    683 
 
 paul@126    684 
        """
 
 paul@126    685 
        Write the declarations to 'f_decls' and definitions to 'f_defs' for
 
 paul@579    686 
        the object having the given 'table_name' and the given 'min_parameters',
 
 paul@579    687 
        'max_parameters' and 'structure_size', with 'table' details used to
 
 paul@579    688 
        populate the definition.
 
 paul@126    689 
        """
 
 paul@126    690 
 
 paul@570    691 
        members = []
 
 paul@570    692 
        for t in table:
 
 paul@579    693 
            members.append("{.code=%s, .pos=%s}" % t)
 
 paul@570    694 
 
 paul@126    695 
        print >>f_decls, "extern const __ptable %s;\n" % table_name
 
 paul@126    696 
 
 paul@126    697 
        # Write the corresponding definition.
 
 paul@126    698 
 
 paul@570    699 
        print >>f_defs, """\
 
 paul@570    700 
const __ptable %s = {
 
 paul@579    701 
    .min=%s,
 
 paul@579    702 
    .max=%s,
 
 paul@579    703 
    .size=%s,
 
 paul@570    704 
    {
 
 paul@570    705 
        %s
 
 paul@570    706 
    }
 
 paul@570    707 
};
 
 paul@579    708 
""" % (table_name, min_parameters, max_parameters, structure_size,
 
 paul@579    709 
       ",\n        ".join(members))
 
 paul@126    710 
 
 paul@136    711 
    def write_instance_structure(self, f_decls, path, structure_size):
 
 paul@126    712 
 
 paul@126    713 
        """
 
 paul@136    714 
        Write a declaration to 'f_decls' for the object having the given 'path'
 
 paul@136    715 
        and the given 'structure_size'.
 
 paul@126    716 
        """
 
 paul@126    717 
 
 paul@126    718 
        # Write an instance-specific type definition for instances of classes.
 
 paul@126    719 
        # See: templates/types.h
 
 paul@126    720 
 
 paul@126    721 
        print >>f_decls, """\
 
 paul@126    722 
typedef struct {
 
 paul@126    723 
    const __table * table;
 
 paul@568    724 
    __pos pos;
 
 paul@126    725 
    __attr attrs[%s];
 
 paul@126    726 
} %s;
 
 paul@136    727 
""" % (structure_size, encode_symbol("obj", path))
 
 paul@136    728 
 
 paul@211    729 
    def write_structure(self, f_decls, f_defs, structure_name, table_name, structure, path=None):
 
 paul@126    730 
 
 paul@136    731 
        """
 
 paul@136    732 
        Write the declarations to 'f_decls' and definitions to 'f_defs' for
 
 paul@136    733 
        the object having the given 'structure_name', the given 'table_name',
 
 paul@211    734 
        and the given 'structure' details used to populate the definition.
 
 paul@136    735 
        """
 
 paul@126    736 
 
 paul@136    737 
        if f_decls:
 
 paul@136    738 
            print >>f_decls, "extern __obj %s;\n" % encode_path(structure_name)
 
 paul@136    739 
 
 paul@136    740 
        is_class = path and self.importer.get_object(path).has_kind("<class>")
 
 paul@623    741 
        pos = is_class and encode_pos(encode_type_attribute(path)) or "0"
 
 paul@132    742 
 
 paul@132    743 
        print >>f_defs, """\
 
 paul@132    744 
__obj %s = {
 
 paul@132    745 
    &%s,
 
 paul@132    746 
    %s,
 
 paul@132    747 
    {
 
 paul@132    748 
        %s
 
 paul@132    749 
    }};
 
 paul@132    750 
""" % (
 
 paul@136    751 
            encode_path(structure_name), table_name, pos,
 
 paul@126    752 
            ",\n        ".join(structure))
 
 paul@126    753 
 
 paul@132    754 
    def get_argument_limits(self, path):
 
 paul@126    755 
 
 paul@132    756 
        """
 
 paul@132    757 
        Return the argument minimum and maximum for the callable at 'path',
 
 paul@132    758 
        adding an argument position for a universal context.
 
 paul@132    759 
        """
 
 paul@132    760 
 
 paul@126    761 
        parameters = self.importer.function_parameters[path]
 
 paul@126    762 
        defaults = self.importer.function_defaults.get(path)
 
 paul@132    763 
        num_parameters = len(parameters) + 1
 
 paul@132    764 
        return num_parameters - (defaults and len(defaults) or 0), num_parameters
 
 paul@126    765 
 
 paul@126    766 
    def get_attribute_names(self, indexes):
 
 paul@126    767 
 
 paul@126    768 
        """
 
 paul@126    769 
        Given a list of attribute table 'indexes', return a list of attribute
 
 paul@126    770 
        names.
 
 paul@126    771 
        """
 
 paul@126    772 
 
 paul@126    773 
        all_attrnames = self.optimiser.all_attrnames
 
 paul@126    774 
        attrnames = []
 
 paul@126    775 
        for i in indexes:
 
 paul@126    776 
            if i is None:
 
 paul@126    777 
                attrnames.append(None)
 
 paul@126    778 
            else:
 
 paul@126    779 
                attrnames.append(all_attrnames[i])
 
 paul@126    780 
        return attrnames
 
 paul@126    781 
 
 paul@126    782 
    def get_static_attributes(self, kind, name, attrnames):
 
 paul@126    783 
 
 paul@126    784 
        """
 
 paul@126    785 
        Return a mapping of attribute names to paths for attributes belonging
 
 paul@126    786 
        to objects of the given 'kind' (being "<class>" or "<module>") with
 
 paul@126    787 
        the given 'name' and supporting the given 'attrnames'.
 
 paul@126    788 
        """
 
 paul@126    789 
 
 paul@126    790 
        attrs = {}
 
 paul@126    791 
 
 paul@126    792 
        for attrname in attrnames:
 
 paul@126    793 
            if attrname is None:
 
 paul@126    794 
                continue
 
 paul@126    795 
            if kind == "<class>":
 
 paul@126    796 
                path = self.importer.all_class_attrs[name][attrname]
 
 paul@126    797 
            elif kind == "<module>":
 
 paul@126    798 
                path = "%s.%s" % (name, attrname)
 
 paul@126    799 
            else:
 
 paul@126    800 
                continue
 
 paul@126    801 
 
 paul@126    802 
            # The module may be hidden.
 
 paul@126    803 
 
 paul@126    804 
            attr = self.importer.get_object(path)
 
 paul@126    805 
            if not attr:
 
 paul@126    806 
                module = self.importer.hidden.get(path)
 
 paul@126    807 
                if module:
 
 paul@126    808 
                    attr = Reference(module.name, "<module>")
 
 paul@126    809 
            attrs[attrname] = attr
 
 paul@126    810 
 
 paul@126    811 
        return attrs
 
 paul@126    812 
 
 paul@126    813 
    def get_instance_attributes(self, name, attrnames):
 
 paul@126    814 
 
 paul@126    815 
        """
 
 paul@126    816 
        Return a mapping of attribute names to references for attributes
 
 paul@126    817 
        belonging to instances of the class with the given 'name', where the
 
 paul@126    818 
        given 'attrnames' are supported.
 
 paul@126    819 
        """
 
 paul@126    820 
 
 paul@126    821 
        consts = self.importer.all_instance_attr_constants[name]
 
 paul@126    822 
        attrs = {}
 
 paul@126    823 
        for attrname in attrnames:
 
 paul@126    824 
            if attrname is None:
 
 paul@126    825 
                continue
 
 paul@126    826 
            const = consts.get(attrname)
 
 paul@126    827 
            attrs[attrname] = const or Reference("<var>", "%s.%s" % (name, attrname))
 
 paul@126    828 
        return attrs
 
 paul@126    829 
 
 paul@357    830 
    def populate_table(self, path, table):
 
 paul@126    831 
 
 paul@126    832 
        """
 
 paul@126    833 
        Traverse the attributes in the determined order for the structure having
 
 paul@357    834 
        the given 'path', adding entries to the attribute 'table'.
 
 paul@126    835 
        """
 
 paul@126    836 
 
 paul@357    837 
        for attrname in self.optimiser.structures[path]:
 
 paul@126    838 
 
 paul@126    839 
            # Handle gaps in the structure.
 
 paul@126    840 
 
 paul@126    841 
            if attrname is None:
 
 paul@126    842 
                table.append("0")
 
 paul@126    843 
            else:
 
 paul@623    844 
                table.append(encode_code(attrname))
 
 paul@126    845 
 
 paul@357    846 
    def populate_parameter_table(self, parameters, table):
 
 paul@126    847 
 
 paul@126    848 
        """
 
 paul@357    849 
        Traverse the 'parameters' in the determined order, adding entries to the
 
 paul@357    850 
        attribute 'table'.
 
 paul@126    851 
        """
 
 paul@126    852 
 
 paul@357    853 
        for value in parameters:
 
 paul@126    854 
 
 paul@126    855 
            # Handle gaps in the structure.
 
 paul@126    856 
 
 paul@126    857 
            if value is None:
 
 paul@126    858 
                table.append(("0", "0"))
 
 paul@126    859 
            else:
 
 paul@126    860 
                name, pos = value
 
 paul@126    861 
                table.append((encode_symbol("pcode", name), pos))
 
 paul@126    862 
 
 paul@523    863 
    def populate_function(self, path, function_instance_attrs):
 
 paul@126    864 
 
 paul@126    865 
        """
 
 paul@126    866 
        Populate a structure for the function with the given 'path'. The given
 
 paul@523    867 
        'attrs' provide the instance attributes.
 
 paul@126    868 
        """
 
 paul@126    869 
 
 paul@126    870 
        structure = []
 
 paul@523    871 
        self.populate_structure(Reference("<function>", path), function_instance_attrs, "<instance>", structure)
 
 paul@126    872 
 
 paul@126    873 
        # Append default members.
 
 paul@126    874 
 
 paul@126    875 
        self.append_defaults(path, structure)
 
 paul@126    876 
        return structure
 
 paul@126    877 
 
 paul@523    878 
    def populate_structure(self, ref, attrs, kind, structure):
 
 paul@126    879 
 
 paul@126    880 
        """
 
 paul@126    881 
        Traverse the attributes in the determined order for the structure having
 
 paul@126    882 
        the given 'ref' whose members are provided by the 'attrs' mapping, in a
 
 paul@126    883 
        structure of the given 'kind', adding entries to the object 'structure'.
 
 paul@126    884 
        """
 
 paul@126    885 
 
 paul@174    886 
        # Populate function instance structures for functions.
 
 paul@174    887 
 
 paul@174    888 
        if ref.has_kind("<function>"):
 
 paul@174    889 
            origin = self.function_type
 
 paul@174    890 
            structure_ref = Reference("<instance>", self.function_type)
 
 paul@174    891 
 
 paul@174    892 
        # Otherwise, just populate the appropriate structures.
 
 paul@126    893 
 
 paul@174    894 
        else:
 
 paul@174    895 
            origin = ref.get_origin()
 
 paul@174    896 
            structure_ref = ref
 
 paul@174    897 
 
 paul@174    898 
        for attrname in self.optimiser.structures[structure_ref]:
 
 paul@126    899 
 
 paul@126    900 
            # Handle gaps in the structure.
 
 paul@126    901 
 
 paul@126    902 
            if attrname is None:
 
 paul@477    903 
                structure.append("__NULL")
 
 paul@126    904 
 
 paul@126    905 
            # Handle non-constant and constant members.
 
 paul@126    906 
 
 paul@126    907 
            else:
 
 paul@126    908 
                attr = attrs[attrname]
 
 paul@126    909 
 
 paul@136    910 
                # Special function pointer member.
 
 paul@136    911 
 
 paul@126    912 
                if attrname == "__fn__":
 
 paul@126    913 
 
 paul@523    914 
                    # Classes offer instantiators which can be called without a
 
 paul@523    915 
                    # context.
 
 paul@126    916 
 
 paul@126    917 
                    if kind == "<class>":
 
 paul@126    918 
                        attr = encode_instantiator_pointer(attr)
 
 paul@126    919 
                    else:
 
 paul@126    920 
                        attr = encode_function_pointer(attr)
 
 paul@126    921 
 
 paul@577    922 
                    structure.append("{.fn=%s}" % attr)
 
 paul@126    923 
                    continue
 
 paul@126    924 
 
 paul@136    925 
                # Special argument specification member.
 
 paul@136    926 
 
 paul@126    927 
                elif attrname == "__args__":
 
 paul@357    928 
                    signature = self.get_signature_for_callable(ref.get_origin())
 
 paul@357    929 
                    ptable = encode_tablename("<function>", signature)
 
 paul@357    930 
 
 paul@579    931 
                    structure.append("{.ptable=&%s}" % ptable)
 
 paul@126    932 
                    continue
 
 paul@126    933 
 
 paul@136    934 
                # Special internal data member.
 
 paul@136    935 
 
 paul@136    936 
                elif attrname == "__data__":
 
 paul@569    937 
                    structure.append("{.%s=%s}" % (
 
 paul@378    938 
                                     encode_literal_constant_member(attr),
 
 paul@378    939 
                                     encode_literal_constant_value(attr)))
 
 paul@136    940 
                    continue
 
 paul@136    941 
 
 paul@583    942 
                # Special internal size member.
 
 paul@583    943 
 
 paul@583    944 
                elif attrname == "__size__":
 
 paul@583    945 
                    structure.append("{.intvalue=%d}" % attr)
 
 paul@583    946 
                    continue
 
 paul@583    947 
 
 paul@360    948 
                # Special internal key member.
 
 paul@360    949 
 
 paul@360    950 
                elif attrname == "__key__":
 
 paul@623    951 
                    structure.append("{.code=%s, .pos=%s}" % (attr and encode_code(attr) or "0",
 
 paul@623    952 
                                                              attr and encode_pos(attr) or "0"))
 
 paul@360    953 
                    continue
 
 paul@360    954 
 
 paul@251    955 
                # Special cases.
 
 paul@251    956 
 
 paul@499    957 
                elif attrname in ("__file__", "__name__"):
 
 paul@251    958 
                    path = ref.get_origin()
 
 paul@397    959 
                    value_type = self.string_type
 
 paul@271    960 
 
 paul@489    961 
                    # Provide constant values. These must match the values
 
 paul@489    962 
                    # originally recorded during inspection.
 
 paul@489    963 
 
 paul@271    964 
                    if attrname == "__file__":
 
 paul@271    965 
                        module = self.importer.get_module(path)
 
 paul@271    966 
                        value = module.filename
 
 paul@489    967 
 
 paul@489    968 
                    # Function and class names are leafnames.
 
 paul@489    969 
 
 paul@499    970 
                    elif attrname == "__name__" and not ref.has_kind("<module>"):
 
 paul@489    971 
                        value = path.rsplit(".", 1)[-1]
 
 paul@489    972 
 
 paul@489    973 
                    # All other names just use the object path information.
 
 paul@489    974 
 
 paul@271    975 
                    else:
 
 paul@271    976 
                        value = path
 
 paul@271    977 
 
 paul@406    978 
                    encoding = None
 
 paul@406    979 
 
 paul@406    980 
                    local_number = self.importer.all_constants[path][(value, value_type, encoding)]
 
 paul@251    981 
                    constant_name = "$c%d" % local_number
 
 paul@251    982 
                    attr_path = "%s.%s" % (path, constant_name)
 
 paul@251    983 
                    constant_number = self.optimiser.constant_numbers[attr_path]
 
 paul@609    984 
                    constant_value = "__const%s" % constant_number
 
 paul@251    985 
                    structure.append("%s /* %s */" % (constant_value, attrname))
 
 paul@251    986 
                    continue
 
 paul@251    987 
 
 paul@499    988 
                elif attrname == "__parent__":
 
 paul@499    989 
                    path = ref.get_origin()
 
 paul@499    990 
 
 paul@499    991 
                    # Parents of classes and functions are derived from their
 
 paul@499    992 
                    # object paths.
 
 paul@499    993 
 
 paul@499    994 
                    value = path.rsplit(".", 1)[0]
 
 paul@577    995 
                    structure.append("{.value=&%s}" % encode_path(value))
 
 paul@577    996 
                    continue
 
 paul@577    997 
 
 paul@577    998 
                # Special context member.
 
 paul@577    999 
                # Set the context depending on the kind of attribute.
 
 paul@577   1000 
                # For methods:          <parent>
 
 paul@577   1001 
                # For other attributes: __NULL
 
 paul@577   1002 
 
 paul@577   1003 
                elif attrname == "__context__":
 
 paul@577   1004 
                    path = ref.get_origin()
 
 paul@577   1005 
 
 paul@577   1006 
                    # Contexts of methods are derived from their object paths.
 
 paul@577   1007 
 
 paul@577   1008 
                    context = "0"
 
 paul@577   1009 
 
 paul@577   1010 
                    if ref.get_kind() == "<function>":
 
 paul@577   1011 
                        parent = path.rsplit(".", 1)[0]
 
 paul@577   1012 
                        if self.importer.classes.has_key(parent):
 
 paul@577   1013 
                            context = "&%s" % encode_path(parent)
 
 paul@577   1014 
 
 paul@577   1015 
                    structure.append("{.value=%s}" % context)
 
 paul@499   1016 
                    continue
 
 paul@499   1017 
 
 paul@318   1018 
                # Special class relationship attributes.
 
 paul@318   1019 
 
 paul@318   1020 
                elif is_type_attribute(attrname):
 
 paul@577   1021 
                    structure.append("{.value=&%s}" % encode_path(decode_type_attribute(attrname)))
 
 paul@318   1022 
                    continue
 
 paul@318   1023 
 
 paul@406   1024 
                # All other kinds of members.
 
 paul@406   1025 
 
 paul@126   1026 
                structure.append(self.encode_member(origin, attrname, attr, kind))
 
 paul@126   1027 
 
 paul@126   1028 
    def encode_member(self, path, name, ref, structure_type):
 
 paul@126   1029 
 
 paul@126   1030 
        """
 
 paul@126   1031 
        Encode within the structure provided by 'path', the member whose 'name'
 
 paul@126   1032 
        provides 'ref', within the given 'structure_type'.
 
 paul@126   1033 
        """
 
 paul@126   1034 
 
 paul@126   1035 
        kind = ref.get_kind()
 
 paul@126   1036 
        origin = ref.get_origin()
 
 paul@126   1037 
 
 paul@126   1038 
        # References to constant literals.
 
 paul@126   1039 
 
 paul@338   1040 
        if kind == "<instance>" and ref.is_constant_alias():
 
 paul@338   1041 
            alias = ref.get_name()
 
 paul@126   1042 
 
 paul@406   1043 
            # Use the alias directly if appropriate.
 
 paul@406   1044 
 
 paul@406   1045 
            if alias.startswith("$c"):
 
 paul@609   1046 
                constant_value = encode_literal_constant(alias[2:])
 
 paul@406   1047 
                return "%s /* %s */" % (constant_value, name)
 
 paul@406   1048 
 
 paul@126   1049 
            # Obtain a constant value directly assigned to the attribute.
 
 paul@126   1050 
 
 paul@338   1051 
            if self.optimiser.constant_numbers.has_key(alias):
 
 paul@338   1052 
                constant_number = self.optimiser.constant_numbers[alias]
 
 paul@406   1053 
                constant_value = encode_literal_constant(constant_number)
 
 paul@247   1054 
                return "%s /* %s */" % (constant_value, name)
 
 paul@126   1055 
 
 paul@400   1056 
        # Usage of predefined constants, currently only None supported.
 
 paul@400   1057 
 
 paul@400   1058 
        if kind == "<instance>" and origin == self.none_type:
 
 paul@400   1059 
            attr_path = encode_predefined_reference(self.none_value)
 
 paul@577   1060 
            return "{.value=&%s} /* %s */" % (attr_path, name)
 
 paul@400   1061 
 
 paul@400   1062 
        # Predefined constant members.
 
 paul@136   1063 
 
 paul@136   1064 
        if (path, name) in self.predefined_constant_members:
 
 paul@136   1065 
            attr_path = encode_predefined_reference("%s.%s" % (path, name))
 
 paul@577   1066 
            return "{.value=&%s} /* %s */" % (attr_path, name)
 
 paul@136   1067 
 
 paul@126   1068 
        # General undetermined members.
 
 paul@126   1069 
 
 paul@126   1070 
        if kind in ("<var>", "<instance>"):
 
 paul@404   1071 
            attr_path = encode_predefined_reference(self.none_value)
 
 paul@577   1072 
            return "{.value=&%s} /* %s */" % (attr_path, name)
 
 paul@126   1073 
 
 paul@126   1074 
        else:
 
 paul@577   1075 
            return "{.value=&%s}" % encode_path(origin)
 
 paul@126   1076 
 
 paul@126   1077 
    def append_defaults(self, path, structure):
 
 paul@126   1078 
 
 paul@126   1079 
        """
 
 paul@126   1080 
        For the given 'path', append default parameter members to the given
 
 paul@126   1081 
        'structure'.
 
 paul@126   1082 
        """
 
 paul@126   1083 
 
 paul@126   1084 
        for name, default in self.importer.function_defaults.get(path):
 
 paul@126   1085 
            structure.append(self.encode_member(path, name, default, "<instance>"))
 
 paul@126   1086 
 
 paul@159   1087 
    def write_instantiator(self, f_code, f_signatures, path, init_ref):
 
 paul@126   1088 
 
 paul@126   1089 
        """
 
 paul@159   1090 
        Write an instantiator to 'f_code', with a signature to 'f_signatures',
 
 paul@159   1091 
        for instances of the class with the given 'path', with 'init_ref' as the
 
 paul@159   1092 
        initialiser function reference.
 
 paul@126   1093 
 
 paul@126   1094 
        NOTE: This also needs to initialise any __fn__ and __args__ members
 
 paul@126   1095 
        NOTE: where __call__ is provided by the class.
 
 paul@126   1096 
        """
 
 paul@126   1097 
 
 paul@132   1098 
        parameters = self.importer.function_parameters[init_ref.get_origin()]
 
 paul@126   1099 
 
 paul@126   1100 
        print >>f_code, """\
 
 paul@132   1101 
__attr %s(__attr __args[])
 
 paul@126   1102 
{
 
 paul@159   1103 
    /* Allocate the structure. */
 
 paul@571   1104 
    __args[0] = __NEWINSTANCE(%s);
 
 paul@159   1105 
 
 paul@159   1106 
    /* Call the initialiser. */
 
 paul@146   1107 
    %s(__args);
 
 paul@159   1108 
 
 paul@159   1109 
    /* Return the allocated object details. */
 
 paul@132   1110 
    return __args[0];
 
 paul@126   1111 
}
 
 paul@126   1112 
""" % (
 
 paul@126   1113 
    encode_instantiator_pointer(path),
 
 paul@150   1114 
    encode_path(path),
 
 paul@126   1115 
    encode_function_pointer(init_ref.get_origin())
 
 paul@126   1116 
    )
 
 paul@126   1117 
 
 paul@291   1118 
        print >>f_signatures, "#define __HAVE_%s" % encode_path(path)
 
 paul@159   1119 
        print >>f_signatures, "__attr %s(__attr[]);" % encode_instantiator_pointer(path)
 
 paul@159   1120 
 
 paul@159   1121 
        # Write additional literal instantiators. These do not call the
 
 paul@159   1122 
        # initialisers but instead populate the structures directly.
 
 paul@159   1123 
 
 paul@159   1124 
        if path in self.literal_instantiator_types:
 
 paul@283   1125 
            if path in self.literal_mapping_types:
 
 paul@283   1126 
                style = "mapping"
 
 paul@283   1127 
            else:
 
 paul@283   1128 
                style = "sequence"
 
 paul@283   1129 
 
 paul@159   1130 
            print >>f_code, """\
 
 paul@568   1131 
__attr %s(__attr __args[], __pos number)
 
 paul@159   1132 
{
 
 paul@159   1133 
    /* Allocate the structure. */
 
 paul@571   1134 
    __args[0] = __NEWINSTANCE(%s);
 
 paul@159   1135 
 
 paul@283   1136 
    /* Allocate a structure for the data and set it on the __data__ attribute. */
 
 paul@283   1137 
    %s(__args, number);
 
 paul@159   1138 
 
 paul@159   1139 
    /* Return the allocated object details. */
 
 paul@159   1140 
    return __args[0];
 
 paul@159   1141 
}
 
 paul@159   1142 
""" % (
 
 paul@159   1143 
    encode_literal_instantiator(path),
 
 paul@159   1144 
    encode_path(path),
 
 paul@283   1145 
    encode_literal_data_initialiser(style)
 
 paul@159   1146 
    )
 
 paul@159   1147 
 
 paul@568   1148 
            print >>f_signatures, "__attr %s(__attr[], __pos);" % encode_literal_instantiator(path)
 
 paul@159   1149 
 
 paul@146   1150 
    def write_main_program(self, f_code, f_signatures):
 
 paul@146   1151 
 
 paul@146   1152 
        """
 
 paul@146   1153 
        Write the main program to 'f_code', invoking the program's modules. Also
 
 paul@146   1154 
        write declarations for module main functions to 'f_signatures'.
 
 paul@146   1155 
        """
 
 paul@146   1156 
 
 paul@146   1157 
        print >>f_code, """\
 
 paul@146   1158 
int main(int argc, char *argv[])
 
 paul@159   1159 
{
 
 paul@190   1160 
    __exc __tmp_exc;
 
 paul@272   1161 
 
 paul@434   1162 
    GC_INIT();
 
 paul@434   1163 
 
 paul@159   1164 
    __Try
 
 paul@159   1165 
    {"""
 
 paul@146   1166 
 
 paul@186   1167 
        for name in self.importer.order_modules():
 
 paul@146   1168 
            function_name = "__main_%s" % encode_path(name)
 
 paul@146   1169 
            print >>f_signatures, "void %s();" % function_name
 
 paul@146   1170 
 
 paul@354   1171 
            # Omit the native modules.
 
 paul@146   1172 
 
 paul@354   1173 
            parts = name.split(".")
 
 paul@354   1174 
 
 paul@354   1175 
            if parts[0] != "native":
 
 paul@146   1176 
                print >>f_code, """\
 
 paul@165   1177 
        %s();""" % function_name
 
 paul@146   1178 
 
 paul@146   1179 
        print >>f_code, """\
 
 paul@159   1180 
    }
 
 paul@190   1181 
    __Catch(__tmp_exc)
 
 paul@159   1182 
    {
 
 paul@626   1183 
        if (__ISINSTANCE(__tmp_exc.arg, __ATTRVALUE(&__builtins___exception_system_SystemExit)))
 
 paul@464   1184 
            return __load_via_object(
 
 paul@464   1185 
                __load_via_object(__tmp_exc.arg.value, %s).value,
 
 paul@464   1186 
                %s).intvalue;
 
 paul@464   1187 
 
 paul@273   1188 
        fprintf(stderr, "Program terminated due to exception: %%s.\\n",
 
 paul@272   1189 
                __load_via_object(
 
 paul@626   1190 
                    %s(__ARGS(__NULL, __tmp_exc.arg)).value,
 
 paul@273   1191 
                    %s).strvalue);
 
 paul@159   1192 
        return 1;
 
 paul@159   1193 
    }
 
 paul@477   1194 
 
 paul@477   1195 
    return 0;
 
 paul@146   1196 
}
 
 paul@273   1197 
""" % (
 
 paul@623   1198 
    encode_pos("value"),
 
 paul@623   1199 
    encode_pos("__data__"),
 
 paul@273   1200 
    encode_function_pointer("__builtins__.str.str"),
 
 paul@623   1201 
    encode_pos("__data__")
 
 paul@273   1202 
    )
 
 paul@146   1203 
 
 paul@126   1204 
# vim: tabstop=4 expandtab shiftwidth=4