AdaGenerator.py 95.9 KB
Newer Older
Maxime Perrotin's avatar
Maxime Perrotin committed
1 2 3 4 5 6 7 8 9 10 11
#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
    OpenGEODE - A tiny SDL Editor for TASTE

    This module generates Ada code from SDL process models.
    The Ada code is compliant with the TASTE interfaces, and is
    using the ASN.1 "Space-Certified" compiler for data type definition.
    (See TASTE documentation for more information)

Maxime Perrotin's avatar
Maxime Perrotin committed
12
    The design is flexible and can be used as basis for other backends.
Maxime Perrotin's avatar
Maxime Perrotin committed
13 14 15 16 17 18 19 20 21 22 23

    Entry point:
    The AST of the model that is parsed is described in ogAST.py

    A Visitor Pattern using Python's "singledispatch" mechanism is used
    to go through the AST and generate code for each SDL construct.

    There is a single function called "generate", decorated with the
    singledispatch mechanism, that needs to be called to generate the code
    of any AST element.

Maxime Perrotin's avatar
Maxime Perrotin committed
24 25 26
    The generate function returns two values: "code" and "local_decl",
    containing a set of statements and a set of local variables
    (that can be later placed anywhere in the code).
Maxime Perrotin's avatar
Maxime Perrotin committed
27

Maxime Perrotin's avatar
Maxime Perrotin committed
28 29 30 31 32
    Expressions (all classes derived from ogAST.Expression) are generated
    using the "expression" visitor (singledispatch set of function).

    Expressions return three values: "code", "ada_string" and "local_decl".
    The "ada_string" value is the usable string that corresponds
Maxime Perrotin's avatar
Maxime Perrotin committed
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
    to the result of the expression evaluation.

    For example, take the SDL statement "OUTPUT hello(a+5)"

    This results (in TASTE terminology) in calling the required interface
    called "hello" and passing a parameter of an ASN.1 type (say MyInteger).
    The parameter is always passed by reference.

    It is therefore necessary to build a temporary variable to hold the result
    of the "a+5" expression.

    In this example, the "generate" function will return:
    local_decl = ["tmp01 : MyInteger;"]
    (The template backend can then place it wherever appropriate)

    and code = ["tmp01 := a + 5;", "hello(tmp01);"]
    (The template will then do a '\n'.join(code) - and add indents, etc.)

    To know about "tmp01" and generate the code "hello(tmp01);",
    the function will recursively call "generate" and
    pass a+5 as parameter. The call will return the tuple:

    local_decl = ["tmp01 : MyInteger;"]
    code = ["tmp01 := a + 5;"]
    ada_string = "tmp01"

    This design allows to have any level of complexity in the embedded
    expression in a way that is easy to handle (adding constructs with
    this pattern is straightforward, once the generate function for each AST
    entry is properly implemented).

    Copyright (c) 2012-2013 European Space Agency

    Designed and implemented by Maxime Perrotin

    Contact: maxime.perrotin@esa.int
"""


import logging
73
import traceback
74
import os
Maxime Perrotin's avatar
Maxime Perrotin committed
75
from itertools import chain
Maxime Perrotin's avatar
Maxime Perrotin committed
76 77 78
from singledispatch import singledispatch

import ogAST
79
import Helper
Maxime Perrotin's avatar
Maxime Perrotin committed
80 81 82 83 84 85 86 87 88 89 90 91 92

LOG = logging.getLogger(__name__)

__all__ = ['generate']

# reference to the ASN.1 Data view and to the visible variables (in scope)
TYPES = None
VARIABLES = {}
LOCAL_VAR = {}
# List of output signals and procedures
OUT_SIGNALS = []
PROCEDURES = []

93 94 95
# Specify that the target is a shared library
SHARED_LIB = False

96
UNICODE_SEP = u'\u00dc'
97
LPREFIX = u'ctxt'
Maxime Perrotin's avatar
Maxime Perrotin committed
98 99

@singledispatch
100
def generate(*args, **kwargs):
Maxime Perrotin's avatar
Maxime Perrotin committed
101 102
    ''' Generate the code for an item of the AST '''
    raise TypeError('[AdaGenerator] Unsupported AST construct')
103
    return [], []
Maxime Perrotin's avatar
Maxime Perrotin committed
104 105


Maxime Perrotin's avatar
Maxime Perrotin committed
106
# Processing of the AST
Maxime Perrotin's avatar
Maxime Perrotin committed
107
@generate.register(ogAST.Process)
108
def _process(process, simu=False, **kwargs):
Maxime Perrotin's avatar
Maxime Perrotin committed
109 110 111 112 113 114 115 116
    ''' Generate the code for a complete process (AST Top level) '''
    process_name = process.processName
    global TYPES
    TYPES = process.dataview
    del OUT_SIGNALS[:]
    del PROCEDURES[:]
    OUT_SIGNALS.extend(process.output_signals)
    PROCEDURES.extend(process.procedures)
117
    global SHARED_LIB
118
    global LPREFIX
119 120
    if simu:
        SHARED_LIB = True
121
        LPREFIX = process_name + u'_ctxt'
Maxime Perrotin's avatar
Maxime Perrotin committed
122

123 124 125 126 127 128 129 130 131 132 133
    # When building a shared library (with simu=True), generate a "mini-cv"
    # for aadl2glueC to create the code interfacing with asn1scc
    minicv = ['-- Automatically generated by OpenGEODE - do NOT modify!']
    def aadl_template(sp_name, io_param, pi_or_ri):
        ''' AADL mini-cv code in case of shared library
            sp_name  : name of the PI or RI
            io_param : list of (param_name, type_name, direction)
            pi_or_ri : string "PI" or "RI" depending on the direction
            return a string
        '''
        res = []
134 135 136 137 138
        if not io_param:
            LOG.info('Parameterless interface "{}" will not appear in the'
                     ' AADL file but will be handled directly by the GUI'
                     .format(sp_name))
            return ''
139 140 141 142 143 144
        # In case of shared library, generate the AADL "mini-cv" code
        res.append('SUBPROGRAM {}'.format(sp_name))
        if io_param:
            res.append('FEATURES')
            for param_name, sort, direction in io_param:
                res.append('    {pname}: {io} PARAMETER DataView::{sort} '
145 146 147
                          '{{encoding=>Native;}};'.format(pname=param_name,
                                                          sort=sort,
                                                          io=direction))
148 149 150 151 152 153 154 155 156
        res.append('END {};\n'.format(sp_name))
        res.append('SUBPROGRAM IMPLEMENTATION {}.GUI_{}'
                      .format(sp_name, pi_or_ri))
        res.append('PROPERTIES')
        res.append('    FV_Name => "{}";'.format(process_name))
        res.append('    Source_Language => GUI_{};'.format(pi_or_ri))
        res.append('END {}.GUI_{};\n'.format(sp_name, pi_or_ri))
        return '\n'.join(res)

157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178
    # bash script to simulate the system (TEMPORARY)
    simu_script = '''#!/bin/bash -e
opengeode {pr}.pr --shared
asn1.exe -Ada dataview-uniq.asn -typePrefix asn1Scc -equal
asn1.exe -c dataview-uniq.asn -typePrefix asn1Scc -equal
gnatmake -gnat2012 -c *.adb
gnatbind -n -Llib{pr} {pr}
gnatmake -c -gnat2012 b~{pr}.adb
gcc -shared -fPIC -o lib{pr}.so b~{pr}.o {pr}.o taste_dataview.o adaasn1rtl.o -lgnat
rm -rf simu
mkdir -p simu
asn2aadlPlus dataview-uniq.asn simu/DataView.aadl
cp lib{pr}.so dataview-uniq.asn *.pr simu
mv *.aadl simu
cd simu
aadl2glueC DataView.aadl {pr}_interface.aadl
asn2dataModel -toPython dataview-uniq.asn
make -f Makefile.python
echo "errCodes=$(taste-asn1-errCodes ./dataview-uniq.h)" >>datamodel.py
LD_LIBRARY_PATH=. taste-gui -l
'''.format(pr=process_name)

179

Maxime Perrotin's avatar
Maxime Perrotin committed
180 181
    LOG.info('Generating Ada code for process ' + str(process_name))

182
    # In case model has nested states, flatten everything
183
    Helper.flatten(process, sep=UNICODE_SEP)
184

Maxime Perrotin's avatar
Maxime Perrotin committed
185
    # Process State aggregations (Parallel states)
186

Maxime Perrotin's avatar
Maxime Perrotin committed
187 188
    # Get list of parallel states to be added to the global list of states,
    # and list of their inner substates
189 190
    #aggregates, substates = Helper.state_aggregations(process)
    aggregates = Helper.state_aggregations(process)
191 192 193

    # End debug

Maxime Perrotin's avatar
Maxime Perrotin committed
194 195 196 197
    # Make an maping {input: {state: transition...}} in order to easily
    # generate the lookup tables for the state machine runtime
    mapping = Helper.map_input_state(process)

Maxime Perrotin's avatar
Maxime Perrotin committed
198 199 200
    VARIABLES.update(process.variables)

    process_level_decl = []
201 202

    # Establish the list of states (excluding START states)
203
    statelist = ', '.join(chain(aggregates.viewkeys(), (name for name in
Maxime Perrotin's avatar
Maxime Perrotin committed
204 205
                             process.mapping.iterkeys()
                             if not name.endswith(u'START')))) or 'No_State'
206 207 208 209 210 211 212 213 214 215
    if statelist:
        states_decl = u'type States is ({});'.format(statelist)
        process_level_decl.append(states_decl)

    # Generate the code to declare process-level context
    process_level_decl.extend(['type {}_Ty is'.format(LPREFIX), 'record'])

    if statelist:
        process_level_decl.append('state : States;')

Maxime Perrotin's avatar
Maxime Perrotin committed
216
    # State aggregation: add list of substates (XXX to be added in C generator)
217 218 219 220 221
#    for each in substates:
    for substates in aggregates.viewvalues():
        for each in substates:
            process_level_decl.append(u'{}{}state: States;'
                                      .format(each, UNICODE_SEP))
Maxime Perrotin's avatar
Maxime Perrotin committed
222

Maxime Perrotin's avatar
Maxime Perrotin committed
223 224 225 226
    for var_name, (var_type, def_value) in process.variables.viewitems():
        if def_value:
            # Expression must be a ground expression, i.e. must not
            # require temporary variable to store computed result
Maxime Perrotin's avatar
Maxime Perrotin committed
227
            dst, dstr, dlocal = expression(def_value)
228 229 230
            varbty = find_basic_type(var_type)
            if varbty.kind in ('SequenceOfType', 'OctetStringType'):
                dstr = array_content(def_value, dstr, varbty)
Maxime Perrotin's avatar
Maxime Perrotin committed
231 232
            assert not dst and not dlocal, 'DCL: Expecting a ground expression'
        process_level_decl.append(
233 234
                        u'{n} : aliased {sort}{default};'
                        .format(n=var_name,
Maxime Perrotin's avatar
Maxime Perrotin committed
235 236
                                sort=type_name(var_type),
                                default=u' := ' + dstr if def_value else u''))
Maxime Perrotin's avatar
Maxime Perrotin committed
237

238 239 240
    process_level_decl.append('end record;'.format(LPREFIX))
    process_level_decl.append('{ctxt}: {ctxt}_Ty;'.format(ctxt=LPREFIX))

Maxime Perrotin's avatar
Maxime Perrotin committed
241

242
    for name, val in process.mapping.viewitems():
Maxime Perrotin's avatar
Maxime Perrotin committed
243 244
        if name.endswith(u'START') and name != u'START':
            process_level_decl.append(u'{name} : constant := {val};'
245 246
                                      .format(name=name, val=str(val)))

247
    # Declare start procedure for aggregate states XXX add in C generator
248 249 250 251 252 253 254 255 256 257
    # should create one START per "via" clause, TODO later
    aggreg_start_proc = []
    for name, substates in aggregates.viewitems():
        proc_name = u'procedure {}{}START'.format(name, UNICODE_SEP)
        process_level_decl.append(u'{};'.format(proc_name))
        aggreg_start_proc.extend([u'{} is'.format(proc_name),
                                  'begin'])
        aggreg_start_proc.extend(u'runTransition({sub}{sep}START);'
                                 .format(sub=subname, sep=UNICODE_SEP)
                                 for subname in substates)
258 259
        aggreg_start_proc.append(u'{ctxt}.state := {name};'
                                 .format(ctxt=LPREFIX, name=name))
260 261 262
        aggreg_start_proc.extend([u'end {}{}START;'
                                 .format(name, UNICODE_SEP),
                                 '\n'])
263

264 265 266
    # Add the declaration of the runTransition procedure, if needed
    if process.transitions:
        process_level_decl.append('procedure runTransition(Id: Integer);')
Maxime Perrotin's avatar
Maxime Perrotin committed
267

268
    # Generate the code of the start transition (if process not empty)
269
    start_transition = ['begin',
270
                        'runTransition(0);'] if process.transitions else []
271

Maxime Perrotin's avatar
Maxime Perrotin committed
272 273 274 275 276
    # Generate the TASTE template
    try:
        asn1_modules = '\n'.join(['with {dv};\nuse {dv};'.format(
            dv=dv.replace('-', '_'))
            for dv in process.asn1Modules])
277
        asn1_modules += '\nwith adaasn1rtl;\nuse adaasn1rtl;'
Maxime Perrotin's avatar
Maxime Perrotin committed
278 279 280 281 282 283 284 285
    except TypeError:
        asn1_modules = '--  No ASN.1 data types are used in this model'
    taste_template = ['''\
-- This file was generated automatically: DO NOT MODIFY IT !

with System.IO;
use System.IO;

286
with Ada.Unchecked_Conversion;
287
with Ada.Numerics.Generic_Elementary_Functions;
288

Maxime Perrotin's avatar
Maxime Perrotin committed
289 290 291 292
{dataview}

with Interfaces;
use Interfaces;
293
{C}
Maxime Perrotin's avatar
Maxime Perrotin committed
294
package body {process_name} is'''.format(process_name=process_name,
295 296 297 298
                                         dataview=asn1_modules,
                                         C='with Interfaces.C.Strings;\n'
                                           'use Interfaces.C.Strings;'
                                            if simu else '')]
Maxime Perrotin's avatar
Maxime Perrotin committed
299 300 301 302 303 304

    # Generate the source file (.ads) header
    ads_template = ['''\
-- This file was generated automatically: DO NOT MODIFY IT !

{dataview}
Maxime Perrotin's avatar
Maxime Perrotin committed
305
{C}
Maxime Perrotin's avatar
Maxime Perrotin committed
306 307

package {process_name} is'''.format(process_name=process_name,
Maxime Perrotin's avatar
Maxime Perrotin committed
308 309 310 311
                                    dataview=asn1_modules,
                                    C='with Interfaces.C.Strings;\n'
                                      'use Interfaces.C.Strings;'
                                        if simu else '')]
Maxime Perrotin's avatar
Maxime Perrotin committed
312

Maxime Perrotin's avatar
Maxime Perrotin committed
313
    dll_api = []
314 315
    if simu:
        ads_template.append('--  DLL Interface')
316
        dll_api.append('-- DLL Interface to remotely change internal data')
317 318
        # Add function allowing to trace current state as a string
        process_level_decl.append("function get_state return chars_ptr "
319 320 321 322
                                  "is (New_String(states'Image({ctxt}.state)))"
                                  " with Export, Convention => C, "
                                  'Link_Name => "{name}_state";'
                                  .format(name=process_name, ctxt=LPREFIX))
323 324
        set_state_decl = "procedure set_state(new_state: chars_ptr)"
        ads_template.append("{};".format(set_state_decl))
325
        ads_template.append('pragma export(C, set_state, "_set_state");')
326 327
        dll_api.append("{} is".format(set_state_decl))
        dll_api.append("begin")
328 329
        dll_api.append("{}.state := States'Value(Value(new_state));"
                       .format(LPREFIX))
330 331 332
        dll_api.append("end set_state;")
        dll_api.append("")

333 334 335 336
        # Functions to get gobal variables (length and value)
        for var_name, (var_type, _) in process.variables.viewitems():
            # Getters for local variables
            process_level_decl.append("function l_{name}_size return integer "
337 338 339 340
                                     "is ({prefix}.{name}'Size/8) with Export,"
                                     " Convention => C,"
                                     ' Link_Name => "{name}_size";'
                                     .format(prefix=LPREFIX, name=var_name))
341
            process_level_decl.append("function l_{name}_value"
342 343 344 345 346
                                     " return access {sort} "
                                     "is ({prefix}.{name}'access) with Export,"
                                     " Convention => C,"
                                     ' Link_Name => "{name}_value";'
                                     .format(prefix=LPREFIX, name=var_name,
347 348 349 350 351
                                              sort=type_name(var_type)))
            # Setters for local variables
            setter_decl = "procedure dll_set_l_{name}(value: access {sort})"\
                          .format(name=var_name, sort=type_name(var_type))
            ads_template.append('{};'.format(setter_decl))
352 353
            ads_template.append('pragma export(C, dll_set_l_{name},'
                                ' "_set_{name}");'.format(name=var_name))
354 355
            dll_api.append('{} is'.format(setter_decl))
            dll_api.append('begin')
356
            dll_api.append('{}.{} := value.all;'.format(LPREFIX, var_name))
357 358 359
            dll_api.append('end dll_set_l_{};'.format(var_name))
            dll_api.append('')

Maxime Perrotin's avatar
Maxime Perrotin committed
360 361 362 363 364 365 366 367 368 369 370 371 372
    # Generate the the code of the procedures
    inner_procedures_code = []
    for proc in process.content.inner_procedures:
        proc_code, proc_local = generate(proc)
        process_level_decl.extend(proc_local)
        inner_procedures_code.extend(proc_code)

    # Generate the code for the process-level variable declarations
    taste_template.extend(process_level_decl)

    # Add the code of the procedures definitions
    taste_template.extend(inner_procedures_code)

373 374 375 376
    # Generate the code of the START procedures of state aggregations
    # XXX to be added to C generator
    taste_template.extend(aggreg_start_proc)

377 378 379
    # Add the code of the DLL interface
    taste_template.extend(dll_api)

Maxime Perrotin's avatar
Maxime Perrotin committed
380 381 382
    # Generate the code for each input signal (provided interface) and timers
    for signal in process.input_signals + [
                        {'name': timer.lower()} for timer in process.timers]:
Maxime Perrotin's avatar
Maxime Perrotin committed
383
        if signal.get('name', u'START') == u'START':
Maxime Perrotin's avatar
Maxime Perrotin committed
384
            continue
385 386 387
        pi_header = u'procedure {sig_name}'.format(sig_name=signal['name'])
        param_name = signal.get('param_name') \
                                or u'{}_param'.format(signal['name'])
Maxime Perrotin's avatar
Maxime Perrotin committed
388 389
        # Add (optional) PI parameter (only one is possible in TASTE PI)
        if 'type' in signal:
Maxime Perrotin's avatar
Maxime Perrotin committed
390
            typename = type_name(signal['type'])
391
            pi_header += u'({pName}: access {sort})'.format(
Maxime Perrotin's avatar
Maxime Perrotin committed
392
                                        pName=param_name, sort=typename)
Maxime Perrotin's avatar
Maxime Perrotin committed
393 394

        # Add declaration of the provided interface in the .ads file
395
        ads_template.append(u'--  Provided interface "' + signal['name'] + '"')
Maxime Perrotin's avatar
Maxime Perrotin committed
396
        ads_template.append(pi_header + ';')
397 398 399 400 401 402 403
        ads_template.append(u'pragma export(C, {name}, "{proc}_{name}");'
                             .format(name=signal['name'], proc=process_name))

        if simu:
            # Generate code for the mini-cv template
            params = [(param_name, type_name(signal['type'], use_prefix=False),
                      'IN')] if 'type' in signal else []
404
            minicv.append(aadl_template(signal['name'], params, 'RI'))
Maxime Perrotin's avatar
Maxime Perrotin committed
405 406 407 408

        pi_header += ' is'
        taste_template.append(pi_header)
        taste_template.append('begin')
409
        taste_template.append('case {ctxt}.state is'.format(ctxt=LPREFIX))
Maxime Perrotin's avatar
Maxime Perrotin committed
410
        for state in process.mapping.viewkeys():
Maxime Perrotin's avatar
Maxime Perrotin committed
411
            if state.endswith(u'START'):
Maxime Perrotin's avatar
Maxime Perrotin committed
412
                continue
Maxime Perrotin's avatar
Maxime Perrotin committed
413
            taste_template.append(u'when {state} =>'.format(state=state))
Maxime Perrotin's avatar
Maxime Perrotin committed
414
            input_def = mapping[signal['name']].get(state)
415
            # Check for nested states to call optional exit procedure
416
            sep = UNICODE_SEP
417
            state_tree = state.split(sep)
Maxime Perrotin's avatar
Maxime Perrotin committed
418
            context = process
419 420 421 422 423 424
            exitlist = []
            current = ''
            trans = input_def and process.transitions[input_def.transition_id]
            while state_tree:
                current = current + state_tree.pop(0)
                for comp in context.composite_states:
425
                    if current.lower() == comp.statename.lower():
426 427 428 429 430 431 432 433
                        if comp.exit_procedure:
                            exitlist.append(current)
                        context = comp
                        current = current + sep
                        break
            for each in reversed(exitlist):
                if trans and all(each.startswith(trans_st)
                                 for trans_st in trans.possible_states):
434 435
                    taste_template.append(u'p{sep}{ref}{sep}exit;'
                                          .format(ref=each, sep=sep))
436

Maxime Perrotin's avatar
Maxime Perrotin committed
437 438 439 440
            if input_def:
                for inp in input_def.parameters:
                    # Assign the (optional and unique) parameter
                    # to the corresponding process variable
441 442
                    taste_template.append(u'{ctxt}.{inp} := {tInp}.all;'
                                          .format(ctxt=LPREFIX,
443 444
                                                  inp=inp,
                                                  tInp=param_name))
Maxime Perrotin's avatar
Maxime Perrotin committed
445 446
                # Execute the correponding transition
                if input_def.transition:
Maxime Perrotin's avatar
Maxime Perrotin committed
447
                    taste_template.append(u'runTransition({idx});'.format(
Maxime Perrotin's avatar
Maxime Perrotin committed
448 449 450 451 452 453 454 455
                        idx=input_def.transition_id))
                else:
                    taste_template.append('null;')
            else:
                taste_template.append('null;')
        taste_template.append('when others =>')
        taste_template.append('null;')
        taste_template.append('end case;')
456
        taste_template.append(u'end {};'.format(signal['name']))
Maxime Perrotin's avatar
Maxime Perrotin committed
457 458 459 460 461
        taste_template.append('\n')

    # for the .ads file, generate the declaration of the required interfaces
    # output signals are the asynchronous RI - only one parameter
    for signal in process.output_signals:
462

463 464
        param_name = signal.get('param_name') \
                                or u'{}_param'.format(signal['name'])
Maxime Perrotin's avatar
Maxime Perrotin committed
465
        # Add (optional) RI parameter
466 467 468
        # Paramless TMs: when targetting simulation, the name of the TM is
        # passed as single parameter. This allows the simualor to handle them
        # dynamically, with a single callback function for all TMs
Maxime Perrotin's avatar
Maxime Perrotin committed
469
        param_spec = '' if not simu else "(tm: chars_ptr)"
Maxime Perrotin's avatar
Maxime Perrotin committed
470
        if 'type' in signal:
Maxime Perrotin's avatar
Maxime Perrotin committed
471
            typename = type_name(signal['type'])
472 473 474 475 476
            param_spec = u'({pName}: access {sort}{shared})' \
                         .format(pName=param_name,
                                 sort=typename,
                                 shared=u'; Size: Integer'
                                        if SHARED_LIB else '')
477 478 479
        ads_template.append(u'--  {}equired interface "{}"'
                            .format("Paramless r" if not 'type' in signal
                                else "R", signal['name']))
480 481 482 483 484 485
        if simu:
            # When generating a shared library, we need a callback mechanism
            ads_template.append(u'type {}_T is access procedure{};'
                                .format(signal['name'], param_spec))
            ads_template.append('pragma Convention(Convention => C,'
                                ' Entity => {}_T);'.format(signal['name']))
486
            ads_template.append('{sig} : {sig}_T;'
487
                                .format(sig=signal['name']))
488 489 490 491 492
            ads_template.append('procedure Register_{sig}(Callback: {sig}_T);'
                                .format(sig=signal['name']))
            ads_template.append('pragma Export(C, Register_{sig},'
                                ' "register_{sig}");'
                                .format(sig=signal['name']))
493 494 495 496

            # Generate code for the mini-cv template
            params = [(param_name, type_name(signal['type'], use_prefix=False),
                      'IN')] if 'type' in signal else []
497
            minicv.append(aadl_template(signal['name'], params, 'PI'))
498

499 500 501 502 503 504 505
            taste_template.append('procedure Register_{sig}'
                                  '(Callback:{sig}_T) is'
                                  .format(sig=signal['name']))
            taste_template.append('begin')
            taste_template.append('{} := Callback;'.format(signal['name']))
            taste_template.append('end Register_{};'.format(signal['name']))
            taste_template.append('')
506 507 508 509 510
        else:
            ads_template.append(u'procedure {}{};'
                                .format(signal['name'], param_spec))
            ads_template.append(u'pragma import(C, {sig}, "{proc}_RI_{sig}");'
                                .format(sig=signal['name'], proc=process_name))
Maxime Perrotin's avatar
Maxime Perrotin committed
511 512

    # for the .ads file, generate the declaration of the external procedures
513 514
    for proc in (proc for proc in process.procedures if proc.external):
        ri_header = u'procedure {sig_name}'.format(sig_name=proc.inputString)
Maxime Perrotin's avatar
Maxime Perrotin committed
515
        params = []
516 517 518 519
        params_spec = u""
        if simu:
            # For simulators: add the TM name as first parameter
            params.append("tm: chars_ptr")
Maxime Perrotin's avatar
Maxime Perrotin committed
520
        for param in proc.fpar:
Maxime Perrotin's avatar
Maxime Perrotin committed
521
            typename = type_name(param['type'])
522
            params.append(u'{par[name]}: access {sort}{shared}'
Maxime Perrotin's avatar
Maxime Perrotin committed
523
                          .format(par=param,
524 525 526 527
                                  sort=typename,
                                  shared=u"; {}_Size: Integer"
                                         .format(param['name'])
                                         if SHARED_LIB else ""))
Maxime Perrotin's avatar
Maxime Perrotin committed
528
        if params:
529 530
            params_spec = "({})".format("; ".join(params))
            ri_header += params_spec
Maxime Perrotin's avatar
Maxime Perrotin committed
531
        ads_template.append(
dbarbera's avatar
dbarbera committed
532
                        u'--  Sync required interface "' + proc.inputString)
533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557
        if simu:
            # As for async TM, generate a callback mechanism
            ads_template.append(u"type {}_T is access procedure{};"
                                .format(proc.inputString, params_spec))
            ads_template.append('pragma Convention(Convention => C,'
                                ' Entity => {}_T);'.format(proc.inputString))
            ads_template.append('{sig} : {sig}_T;'
                                .format(sig=proc.inputString))
            ads_template.append('procedure Register_{sig}(Callback: {sig}_T);'
                                .format(sig=proc.inputString))
            ads_template.append('pragma Export(C, Register_{sig},'
                                ' "register_{sig}");'
                                .format(sig=proc.inputString))
            taste_template.append('procedure Register_{sig}'
                                  '(Callback:{sig}_T) is'
                                  .format(sig=proc.inputString))
            taste_template.append('begin')
            taste_template.append('{} := Callback;'.format(proc.inputString))
            taste_template.append('end Register_{};'.format(proc.inputString))
            taste_template.append('')

        else:
            ads_template.append(ri_header + u';')
            ads_template.append(u'pragma import(C, {sig}, "{proc}_RI_{sig}");'
                    .format(sig=proc.inputString, proc=process_name))
Maxime Perrotin's avatar
Maxime Perrotin committed
558 559 560

    # for the .ads file, generate the declaration of timers set/reset functions
    for timer in process.timers:
561 562 563 564 565
        ads_template.append(u'--  Timer {} SET and RESET functions'
                            .format(timer))
        if simu:
            # Declare callback registration for the SET and RESET functions
            ads_template.append(u'type SET_{}_T is access procedure'
Maxime Perrotin's avatar
Maxime Perrotin committed
566
                                 '(name: chars_ptr; duration: Integer);'
567
                                .format(timer))
Maxime Perrotin's avatar
Maxime Perrotin committed
568 569
            ads_template.append(u'type RESET_{}_T is access procedure'
                                '(name: chars_ptr);'.format(timer))
570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595
            for each in ('', 'RE'):
                ads_template.append('pragma Convention(Convention => C,'
                                    ' Entity => {re}SET_{t}_T);'
                                    .format(re=each, t=timer))
                ads_template.append('{re}SET_{t} : {re}SET_{t}_T;'
                                    .format(re=each, t=timer))
                ads_template.append('procedure Register_{re}SET_{t}'
                                    '(Callback: {re}SET_{t}_T);'
                                    .format(re=each, t=timer))
                ads_template.append('pragma Export(C, Register_{re}SET_{t},'
                                    ' "register_{re}SET_{t}");'
                                    .format(re=each, t=timer))
            # Code for the SET/RESET timer callback registration
            for each in ('', 'RE'):
                taste_template.append('procedure Register_{re}SET_{t}'
                                      '(Callback:{re}SET_{t}_T) is'
                                      .format(re=each, t=timer))
                taste_template.append('begin')
                taste_template.append('{re}SET_{t} := Callback;'
                                      .format(re=each, t=timer))
                taste_template.append('end Register_{re}SET_{t};'
                                      .format(re=each, t=timer))
                taste_template.append('')

        else:
            ads_template.append(u'procedure SET_{}(val: access asn1SccT_UInt32);'
Maxime Perrotin's avatar
Maxime Perrotin committed
596
                .format(timer))
597
            ads_template.append(
Maxime Perrotin's avatar
Maxime Perrotin committed
598
                u'pragma import(C, SET_{timer}, "{proc}_RI_set_{timer}");'
Maxime Perrotin's avatar
Maxime Perrotin committed
599
                .format(timer=timer, proc=process_name))
600 601
            ads_template.append(u'procedure RESET_{};'.format(timer))
            ads_template.append(
Maxime Perrotin's avatar
Maxime Perrotin committed
602
                u'pragma import(C, RESET_{timer}, "{proc}_RI_reset_{timer}");'
Maxime Perrotin's avatar
Maxime Perrotin committed
603 604
                .format(timer=timer, proc=process_name))

605 606 607 608 609 610
    # If the process has no input, output, procedures, or timers, then Ada
    # will not compile the body - generate a pragma to fix this
    if not process.timers and not process.procedures \
            and not process.input_signals and not process.output_signals:
        ads_template.append('pragma elaborate_body;')

611 612
    # Transform inner labels to floating labels
    Helper.inner_labels_to_floating(process)
Maxime Perrotin's avatar
Maxime Perrotin committed
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628

    # Generate the code for all transitions
    code_transitions = []
    local_decl_transitions = []
    for proc_tr in process.transitions:
        code_tr, tr_local_decl = generate(proc_tr)
        code_transitions.append(code_tr)
        local_decl_transitions.extend(tr_local_decl)

    # Generate code for the floating labels
    code_labels = []
    for label in process.content.floating_labels:
        code_label, label_decl = generate(label)
        local_decl_transitions.extend(label_decl)
        code_labels.extend(code_label)

629 630 631 632
    # Generate the code of the runTransition procedure, if needed
    if process.transitions:
        taste_template.append('procedure runTransition(Id: Integer) is')
        taste_template.append('trId : Integer := Id;')
Maxime Perrotin's avatar
Maxime Perrotin committed
633

634 635 636
        # Declare the local variables needed by the transitions in the template
        taste_template.extend(set(local_decl_transitions))
        taste_template.append('begin')
637

638 639 640
        # Generate a loop that ends when a next state is reached
        # (there can be chained transition when entering a nested state)
        taste_template.append('while (trId /= -1) loop')
Maxime Perrotin's avatar
Maxime Perrotin committed
641

642 643
        # Generate the switch-case on the transition id
        taste_template.append('case trId is')
Maxime Perrotin's avatar
Maxime Perrotin committed
644

645 646 647 648 649 650 651
        for idx, val in enumerate(code_transitions):
            taste_template.append(u'when {idx} =>'.format(idx=idx))
            val = [u'{line}'.format(line=l) for l in val]
            if val:
                taste_template.extend(val)
            else:
                taste_template.append('null;')
Maxime Perrotin's avatar
Maxime Perrotin committed
652

653 654 655 656 657 658 659 660
        taste_template.append('when others =>')
        taste_template.append('null;')

        taste_template.append('end case;')
        if code_labels:
            # Due to nested states (chained transitions) jump over label code
            # (NEXTSTATEs do not return from runTransition)
            taste_template.append('goto next_transition;')
Maxime Perrotin's avatar
Maxime Perrotin committed
661

662 663
        # Add the code for the floating labels
        taste_template.extend(code_labels)
Maxime Perrotin's avatar
Maxime Perrotin committed
664

665 666 667 668 669 670
        #if code_labels:
        taste_template.append('<<next_transition>>')
        taste_template.append('null;')
        taste_template.append('end loop;')
        taste_template.append('end runTransition;')
        taste_template.append('\n')
Maxime Perrotin's avatar
Maxime Perrotin committed
671

672
    # Add code of the package elaboration
Maxime Perrotin's avatar
Maxime Perrotin committed
673 674 675 676 677 678 679
    taste_template.extend(start_transition)
    taste_template.append('end {process_name};'
            .format(process_name=process_name))

    ads_template.append('end {process_name};'
            .format(process_name=process_name))

680
    with open(process_name.lower() + os.extsep + 'adb', 'w') as ada_file:
Maxime Perrotin's avatar
Maxime Perrotin committed
681 682
        ada_file.write(
                u'\n'.join(format_ada_code(taste_template)).encode('latin1'))
Maxime Perrotin's avatar
Maxime Perrotin committed
683

684
    with open(process_name.lower() + os.extsep + 'ads', 'w') as ada_file:
Maxime Perrotin's avatar
Maxime Perrotin committed
685 686
        ada_file.write(
                u'\n'.join(format_ada_code(ads_template)).encode('latin1'))
Maxime Perrotin's avatar
Maxime Perrotin committed
687

688 689 690 691
    if simu:
        with open(u'{}_interface.aadl'.format(process_name), 'w') as aadl:
            aadl.write(u'\n'.join(minicv).encode('latin1'))

692 693 694 695
    if not simu:
        with open('{}_simu.sh'.format(process_name), 'w') as bash_script:
            bash_script.write(simu_script)

Maxime Perrotin's avatar
Maxime Perrotin committed
696 697 698 699 700 701 702 703

def write_statement(param, newline):
    ''' Generate the code for the special "write" operator '''
    code = []
    string = ''
    local = []
    basic_type = find_basic_type(param.exprType) or {}
    type_kind = basic_type.kind
704 705 706 707 708 709 710 711 712
    if isinstance(param, ogAST.ExprAppend):
        # Append: call Put_Line separately for each side of the expression
        st1, _, lcl1= write_statement(param.left, newline = False)
        st2, _, lcl2 = write_statement(param.right, newline = False)
        code.extend(st1)
        code.extend(st2)
        local.extend(lcl1)
        local.extend(lcl2)
    elif type_kind.endswith('StringType'):
Maxime Perrotin's avatar
Maxime Perrotin committed
713 714
        if isinstance(param, ogAST.PrimStringLiteral):
            # Raw string
715 716
            code.append(u'Put("{}");'
                        .format(param.value[1:-1].replace('"', "'")))
Maxime Perrotin's avatar
Maxime Perrotin committed
717
        else:
Maxime Perrotin's avatar
Maxime Perrotin committed
718
            code, string, local = expression(param)
719 720
            if type_kind == 'OctetStringType':
                # Octet string -> convert to Ada string
721
                sep = UNICODE_SEP
722
                last_it = u""
723 724
                if isinstance(param, ogAST.PrimSubstring):
                    range_str = u"{}'Range".format(string)
725
                    iterator = u"i - {}'First + 1".format(string)
726 727 728
                elif basic_type.Min == basic_type.Max:
                    range_str = u"{}.Data'Range".format(string)
                    string += u".Data"
729
                    iterator = u"i"
730 731 732
                else:
                    range_str = u"1 .. {}.Length".format(string)
                    string += u".Data"
733 734
                    iterator = u"i"
                    last_it = u"({})".format(range_str)
735
                code.extend([u"for i in {} loop".format(range_str),
736 737
                             u"Put(Character'Val({st}(i)));"
                             .format(st=string, sep=sep, it=iterator),
738
                             u"end loop;"])
739 740
            else:
                code.append("Put({});".format(string))
Maxime Perrotin's avatar
Maxime Perrotin committed
741 742
    elif type_kind in ('IntegerType', 'RealType',
                       'BooleanType', 'Integer32Type'):
Maxime Perrotin's avatar
Maxime Perrotin committed
743
        code, string, local = expression(param)
dbarbera's avatar
dbarbera committed
744
        if type_kind in ('IntegerType', 'Integer32Type'):
745
            cast = "Asn1Int"
Maxime Perrotin's avatar
Maxime Perrotin committed
746 747 748 749
        elif type_kind == 'RealType':
            cast = 'Long_Float'
        elif type_kind == 'BooleanType':
            cast = 'Boolean'
750
        code.append(u"Put({cast}'Image({s}));".format(cast=cast, s=string))
751 752 753 754
    elif type_kind == 'EnumeratedType':
        code, string, local = expression(param)
        code.append(u"Put({}'Image({}));".format(type_name(param.exprType),
                                                 string))
Maxime Perrotin's avatar
Maxime Perrotin committed
755
    else:
756
        error = (u'Unsupported parameter in write call ' +
Maxime Perrotin's avatar
Maxime Perrotin committed
757 758 759
                param.inputString)
        LOG.error(error)
        raise TypeError(error)
760 761
    if newline:
        code.append(u"New_Line;")
Maxime Perrotin's avatar
Maxime Perrotin committed
762 763 764 765 766
    return code, string, local


@generate.register(ogAST.Output)
@generate.register(ogAST.ProcedureCall)
767
def _call_external_function(output, **kwargs):
Maxime Perrotin's avatar
Maxime Perrotin committed
768 769 770 771 772 773 774 775 776
    ''' Generate the code of a set of output or procedure call statement '''
    code = []
    local_decl = []

    # Add the traceability information
    code.extend(traceability(output))

    for out in output.output:
        signal_name = out['outputName']
777
        list_of_params = []
Maxime Perrotin's avatar
Maxime Perrotin committed
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796

        if signal_name.lower() in ('write', 'writeln'):
            # special built-in SDL procedure for printing strings
            # supports printing of native types (int, real, bool)
            # but not yet complex ASN.1 structures (sequence/seqof/choice)
            for param in out['params'][:-1]:
                stmts, _, local = write_statement(param, newline=False)
                code.extend(stmts)
                local_decl.extend(local)
            for param in out['params'][-1:]:
                # Last parameter - add newline if necessary
                stmts, _, local = write_statement(param, newline=True if
                        signal_name.lower() == 'writeln' else False)
                code.extend(stmts)
                local_decl.extend(local)
            continue
        elif signal_name.lower() == 'reset_timer':
            # built-in operator for resetting timers. param = timer name
            param, = out['params']
Maxime Perrotin's avatar
Maxime Perrotin committed
797
            p_code, p_id, p_local = expression(param)
Maxime Perrotin's avatar
Maxime Perrotin committed
798 799
            code.extend(p_code)
            local_decl.extend(p_local)
Maxime Perrotin's avatar
Maxime Perrotin committed
800 801 802 803
            if not SHARED_LIB:
                code.append('RESET_{};'.format(p_id))
            else:
                code.append('RESET_{t}(New_String("{t}"));'.format(t=p_id))
Maxime Perrotin's avatar
Maxime Perrotin committed
804 805 806 807
            continue
        elif signal_name.lower() == 'set_timer':
            # built-in operator for setting a timer: SET(1000, timer_name)
            timer_value, timer_id = out['params']
Maxime Perrotin's avatar
Maxime Perrotin committed
808 809
            t_code, t_val, t_local = expression(timer_value)
            p_code, p_id, p_local = expression(timer_id)
Maxime Perrotin's avatar
Maxime Perrotin committed
810 811 812 813
            code.extend(t_code)
            code.extend(p_code)
            local_decl.extend(t_local)
            local_decl.extend(p_local)
Maxime Perrotin's avatar
Maxime Perrotin committed
814 815 816 817 818 819 820 821 822 823 824
            if not SHARED_LIB:
                # Use a temporary variable to store the timer value
                tmp_id = 'tmp' + str(out['tmpVars'][0])
                local_decl.append('{} : aliased asn1SccT_UInt32;'
                                  .format(tmp_id))
                code.append('{tmp} := {val};'.format(tmp=tmp_id, val=t_val))
                code.append("SET_{timer}({value}'access);"
                            .format(timer=p_id, value=tmp_id))
            else:
                code.append('SET_{t}(New_String("{t}"), {val});'
                            .format(t=p_id, val=t_val))
Maxime Perrotin's avatar
Maxime Perrotin committed
825 826
            continue
        proc, out_sig = None, None
827
        is_out_sig = False
Maxime Perrotin's avatar
Maxime Perrotin committed
828 829 830
        try:
            out_sig, = [sig for sig in OUT_SIGNALS
                        if sig['name'].lower() == signal_name.lower()]
831
            is_out_sig = True if SHARED_LIB else False
Maxime Perrotin's avatar
Maxime Perrotin committed
832
        except ValueError:
833
            # Not an output, try if it is an external or inner procedure
Maxime Perrotin's avatar
Maxime Perrotin committed
834
            try:
835
                proc, = [sig for sig in PROCEDURES
Maxime Perrotin's avatar
Maxime Perrotin committed
836
                            if sig.inputString.lower() == signal_name.lower()]
837 838
                if proc.external:
                    out_sig = proc
839 840 841 842
                    if SHARED_LIB:
                        is_out_sig = True
                        list_of_params = ['New_String("{}")'
                                              .format(out['outputName'])]
Maxime Perrotin's avatar
Maxime Perrotin committed
843
            except ValueError:
844
                # Not there? Impossible, the parser would have barked
845
                raise ValueError(u'Probably a bug - please report')
Maxime Perrotin's avatar
Maxime Perrotin committed
846
        if out_sig:
847
            #list_of_params = []
Maxime Perrotin's avatar
Maxime Perrotin committed
848 849 850 851 852 853 854 855 856 857
            for idx, param in enumerate(out.get('params') or []):
                param_direction = 'in'
                try:
                    # If it is an output, there is a single parameter
                    param_type = out_sig['type']
                except TypeError:
                    # Else if it is a procedure, get the type
                    param_type = out_sig.fpar[idx]['type']
                    param_direction = out_sig.fpar[idx]['direction']

Maxime Perrotin's avatar
Maxime Perrotin committed
858
                typename = type_name(param_type)
Maxime Perrotin's avatar
Maxime Perrotin committed
859
                p_code, p_id, p_local = expression(param)
Maxime Perrotin's avatar
Maxime Perrotin committed
860 861 862
                code.extend(p_code)
                local_decl.extend(p_local)
                # Create a temporary variable for input parameters only
Maxime Perrotin's avatar
Maxime Perrotin committed
863 864
                # (If needed, i.e. if argument is not a local variable)
                if param_direction == 'in' \
865
                        and (not (isinstance(param, ogAST.PrimVariable)
866
                        and p_id.startswith(LPREFIX)) # NO FIXME WITH CTXT
867
                        or isinstance(param, ogAST.PrimFPAR)):
868 869 870 871
                    tmp_id = 'tmp{}'.format(out['tmpVars'][idx])
                    local_decl.append('{tmp} : aliased {sort};'
                                      .format(tmp=tmp_id,
                                              sort=typename))
872 873 874 875
                    if isinstance(param,
                              (ogAST.PrimSequenceOf, ogAST.PrimStringLiteral)):
                        p_id = array_content(param, p_id,
                                             find_basic_type(param_type))
876 877 878 879 880
                    code.append('{} := {};'.format(tmp_id, p_id))
                    list_of_params.append("{}'access{}"
                                          .format(tmp_id,
                                                  ", {}'Size".format(tmp_id)
                                                     if is_out_sig else ""))
Maxime Perrotin's avatar
Maxime Perrotin committed
881
                else:
882 883 884
                    # Output parameters/local variables
                    list_of_params.append(u"{var}'access{shared}"
                                         .format(var=p_id,
Maxime Perrotin's avatar
Maxime Perrotin committed
885 886
                                                shared=", {}'Size".format(p_id)
                                                  if is_out_sig else ""))
Maxime Perrotin's avatar
Maxime Perrotin committed
887
            if list_of_params:
888 889 890
                code.append(u'{RI}({params});'
                            .format(RI=out['outputName'],
                                    params=', '.join(list_of_params)))
Maxime Perrotin's avatar
Maxime Perrotin committed
891
            else:
892 893 894
                if not SHARED_LIB:
                    code.append(u'{RI};'.format(RI=out['outputName']))
                else:
Maxime Perrotin's avatar
Maxime Perrotin committed
895 896
                    code.append(u'{RI}(New_String("{RI}"));'
                                .format(RI=out['outputName']))
Maxime Perrotin's avatar
Maxime Perrotin committed
897 898 899
        else:
            # inner procedure call
            list_of_params = []
900
            for param in out.get('params', []):
Maxime Perrotin's avatar
Maxime Perrotin committed
901
                p_code, p_id, p_local = expression(param)
Maxime Perrotin's avatar
Maxime Perrotin committed
902 903 904 905 906
                code.extend(p_code)
                local_decl.extend(p_local)
                # no need to use temporary variables, we are in pure Ada
                list_of_params.append(p_id)
            if list_of_params:
907 908
                code.append(u'p{sep}{proc}({params});'.format(
                    sep=UNICODE_SEP,
Maxime Perrotin's avatar
Maxime Perrotin committed
909 910 911
                    proc=proc.inputString,
                    params=', '.join(list_of_params)))
            else:
912
                code.append(u'p{}{};'.format(UNICODE_SEP, proc.inputString))
Maxime Perrotin's avatar
Maxime Perrotin committed
913 914 915 916
    return code, local_decl


@generate.register(ogAST.TaskAssign)
917
def _task_assign(task, **kwargs):
Maxime Perrotin's avatar
Maxime Perrotin committed
918 919 920 921 922 923
    ''' A list of assignments in a task symbol '''
    code, local_decl = [], []
    if task.comment:
        code.extend(traceability(task.comment))
    for expr in task.elems:
        code.extend(traceability(expr))
924 925
        # ExprAssign only returns code statements, no string
        code_assign, _, decl_assign = expression(expr)
Maxime Perrotin's avatar
Maxime Perrotin committed
926 927 928 929 930 931
        code.extend(code_assign)
        local_decl.extend(decl_assign)
    return code, local_decl


@generate.register(ogAST.TaskInformalText)
932
def _task_informal_text(task, **kwargs):
Maxime Perrotin's avatar
Maxime Perrotin committed
933 934 935 936 937 938 939 940 941
    ''' Generate Ada comments for informal text '''
    code = []
    if task.comment:
        code.extend(traceability(task.comment))
    code.extend(['-- ' + text.replace('\n', '\n-- ') for text in task.elems])
    return code, []


@generate.register(ogAST.TaskForLoop)
942
def _task_forloop(task, **kwargs):
Maxime Perrotin's avatar
Maxime Perrotin committed
943 944 945 946 947 948
    '''
        Return the code corresponding to a for loop. Two forms are possible:
        for x in range ([start], stop [, step])
        for x in iterable (a SEQUENCE OF)
    '''
    stmt, local_decl = [], []
949
    local_scope = dict(LOCAL_VAR)
Maxime Perrotin's avatar
Maxime Perrotin committed
950 951 952 953 954 955 956
    if task.comment:
        stmt.extend(traceability(task.comment))
    stmt.extend(traceability(task))
    for loop in task.elems:
        if loop['range']:
            start_str, stop_str = '0', ''
            if loop['range']['start']:
Maxime Perrotin's avatar
Maxime Perrotin committed
957
                start_stmt, start_str, start_local = expression(
dbarbera's avatar
dbarbera committed
958
                                                    loop['range']['start'])
Maxime Perrotin's avatar
Maxime Perrotin committed
959 960 961 962
                local_decl.extend(start_local)
                stmt.extend(start_stmt)
            if loop['range']['step'] == 1:
                start_str += '..'
Maxime Perrotin's avatar
Maxime Perrotin committed
963
            stop_stmt, stop_str, stop_local = expression(loop['range']['stop'])
Maxime Perrotin's avatar
Maxime Perrotin committed
964 965 966
            local_decl.extend(stop_local)
            stmt.extend(stop_stmt)
            if loop['range']['step'] == 1:
Maxime Perrotin's avatar
Maxime Perrotin committed
967 968 969 970
                if unicode.isnumeric(stop_str):
                    stop_str = unicode(int(stop_str) - 1)
                else:
                    stop_str = u'{} - 1'.format(stop_str)
Maxime Perrotin's avatar
Maxime Perrotin committed
971
                stmt.append(
972
                        u'for {it} in {start}{stop} loop'
dbarbera's avatar
dbarbera committed
973
                        .format(it=loop['var'], start=start_str, stop=stop_str))
Maxime Perrotin's avatar
Maxime Perrotin committed
974 975 976
            else:
                # Step is not directly supported in Ada, we need to use 'while'
                stmt.extend(['declare',
977
                             u'{it} : Asn1Int := {start};'
Maxime Perrotin's avatar
Maxime Perrotin committed
978 979 980 981
                             .format(it=loop['var'],
                             start=start_str),
                             '',
                             'begin',
982
                             u'while {it} < {stop} loop'.format(it=loop['var'],
Maxime Perrotin's avatar
Maxime Perrotin committed
983 984 985
                                                               stop=stop_str)])
        else:
            # case of form: FOR x in SEQUENCE OF
986 987 988
            # Add iterator to the list of local variables
            LOCAL_VAR.update({loop['var']: (loop['type'], None)})

Maxime Perrotin's avatar
Maxime Perrotin committed
989
            list_stmt, list_str, list_local = expression(loop['list'])
Maxime Perrotin's avatar
Maxime Perrotin committed
990
            basic_type = find_basic_type(loop['list'].exprType)
991
            list_payload = list_str + string_payload(loop['list'], list_str)
992 993 994 995 996
            if isinstance(loop['list'], ogAST.PrimSubstring) or \
                    basic_type</