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<?xml version="1.0" encoding="latin1" ?>
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<!DOCTYPE chapter SYSTEM "chapter.dtd">
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<year>2006</year><year>2009</year>
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<holder>Ericsson AB. All Rights Reserved.</holder>
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The contents of this file are subject to the Erlang Public License,
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Version 1.1, (the "License"); you may not use this file except in
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compliance with the License. You should have received a copy of the
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Erlang Public License along with this software. If not, it can be
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retrieved online at http://www.erlang.org/.
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Software distributed under the License is distributed on an "AS IS"
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basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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the License for the specific language governing rights and limitations
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<title>ASN1 Release Notes</title>
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<prepared>Bertil Karlsson</prepared>
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<responsible></responsible>
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<file>notes_history.sgml</file>
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<p>This document describes the changes made to the asn1 system
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from version to version. The intention of this document is to
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list all incompatibilities as well as all enhancements and
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bug-fixes for every release of the asn1 application. Each release of asn1
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thus constitutes one section in this document. The title of each
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section is the version number of asn1.</p>
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<title>Asn1 1.4.4.14</title>
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<title>Improvements and New Features</title>
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<list type="bulleted">
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<p>Data in info/0 in generated code is moved to attribute
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asn1_info, thus vsn value remains the same if compiler
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options for asn1-spec differs but the generated code is
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<p>Own Id: OTP-6462</p>
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<p>Dialyzer warnings on asn1 are removed, i.e. dead code
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<p>Own Id: OTP-6506</p>
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<title>Asn1 1.4.4.13</title>
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<title>Improvements and New Features</title>
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<list type="bulleted">
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<p>Now it is possible to use 'asn1config' and 'inline'
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options together. It is also possible to use 'inline' on
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<c>asn1ct:compile("MyASN1spec.asn",[inline])</c>.</p>
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<p>Own Id: OTP-6405</p>
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<title>Asn1 1.4.4.12</title>
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<title>Improvements and New Features</title>
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<list type="bulleted">
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<p>As a complement to the option "{inline,OutputFile}" it is
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now possible to use the option "inline". Then asn1 creates
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an output file with the name of the source .set file.</p>
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<p>Own Id: OTP-6314</p>
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<title>Asn1 1.4.4.11</title>
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<title>Fixed Bugs and Malfunctions</title>
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<list type="bulleted">
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<p>When compiling an asn1 source that reference a type in
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another source the compiler uses the asn1db file of the
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other source to resolve the reference. It also tests
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whether the other source has been updated since the
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asn1db file was generated. This last test was to brutal
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in that it exits compilation when no source was found,
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even though a asn1db file existed. Changed behavior from
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a brutal exit to a warning.</p>
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<p>Own Id: OTP-6143</p>
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<title>Asn1 1.4.4.10</title>
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<title>Fixed Bugs and Malfunctions</title>
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<list type="bulleted">
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<p>asn1 encoding failed on BIT STRING with constraint
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<c>(SIZE (32..MAX))</c>.</p>
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<p>Own Id: OTP-5932</p>
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<p>Race condition removed in server for variable names for
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<p>Own Id: OTP-6111</p>
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<title>Asn1 1.4.4.9</title>
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<title>Fixed Bugs and Malfunctions</title>
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<list type="bulleted">
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<p>Now exists a default function clause for table lookup of
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a table constraint. This causes a nice error instead of a
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crash. Did also remove some obsolete funs ({Mod,Fun}) in
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<p>Own Id: OTP-5783</p>
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<p>ASN1-compiler failed to derive a value out of an external
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reference in some certain cases, when compiling specs so
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that the spec with the reference was compiled before the
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spec with the defined value.</p>
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<p>Own Id: OTP-5812 Aux Id: seq10133 </p>
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<p>The documentation of how records of embedded types are
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named is extended and made clearer by examples and rules.
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The section "Naming of Records in .hrl Files" in the
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User's Guide is added.</p>
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<p>Own Id: OTP-5831 Aux Id: seq10133 </p>
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<p>The compiler failed to give right name to record/function
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of a parameterized type that was referenced through
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another instance of a parameterized type in another
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module. The fault occurred when modules were compiled in a
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certain order. Now the compiler resolves the name
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<p>Own Id: OTP-5832 Aux Id: seq10133 </p>
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<title>Asn1 1.4.4.8</title>
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<title>Fixed Bugs and Malfunctions</title>
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<list type="bulleted">
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<p>The dynamic sort of SET OF values now correctly handles
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values encoded in the "ber_bin, der, optimize" mode, the
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value of a SET OF is a list of binaries.</p>
188
<p>Own Id: OTP-5687</p>
191
<p>Bad code was generated for an INTEGER with value-range. If
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the value that was encoded had a lower bound with
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negative value it caused a crash. This bug is now
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<p>Own Id: OTP-5688 Aux Id: seq10049 </p>
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<p>Compiler now handles wrong include paths by returning an
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error if a referenced module is not available.</p>
200
<p>Own Id: OTP-5689</p>
203
<p>The bug causing a runtime error when encoding a type
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defined by: <c>BIT STRING {a(1),b(2)}</c> with the value
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[] in <c>per_bin</c> mode is now removed.</p>
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<p>Own Id: OTP-5710 Aux Id: seq10066 </p>
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<title>Improvements and New Features</title>
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<list type="bulleted">
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<p>Better handling of filename paths</p>
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<p>Own Id: OTP-5701</p>
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<title>Asn1 1.4.4.7</title>
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<title>Fixed Bugs and Malfunctions</title>
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<list type="bulleted">
229
<p>Effective constraint for <c>per</c> now corrected. For
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instance <c>INTEGER (0|15..269)</c> didn't work properly.</p>
231
<p>Own Id: OTP-5477 Aux Id: OTP-5511 </p>
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<p>Adjusted compiler so that functions in generated code
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only are exported once.</p>
236
<p>Own Id: OTP-5509</p>
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<p>Fixed the compiler failure when handling a value range
240
constraint with an extension mark that had the Lower
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bound and/or Upper bound values as an external reference
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to a defined value.</p>
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<p>Own Id: OTP-5511 Aux Id: OTP-5466 </p>
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<p>Removed sorting of elements for SEQUENCE OF. It shall
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only be done in SET OF.</p>
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<p>Own Id: OTP-5602</p>
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<p>Corrected code that generated code causing badarith
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<p>Own Id: OTP-5616</p>
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<title>Asn1 1.4.4.6</title>
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<title>Known Bugs and Problems</title>
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<list type="bulleted">
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<p>Compiler now correctly crashes when compiling bad values.
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Failed for instance on INTEGER value that was a reference
268
to a defined value. Also solved problem with a union
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constraint on an INTEGER.</p>
270
<p>Own Id: OTP-5457</p>
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<p>Additional coverage of object set syntax.</p>
274
<p>Own Id: OTP-5466</p>
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<title>Asn1 1.4.4.5</title>
284
<title>Fixed Bugs and Malfunctions</title>
285
<list type="bulleted">
287
<p>A bug due to representation of open_type values is now
288
fixed. It could cause problem if one used the EXTERNAL
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<p>Own Id: OTP-5302</p>
293
<p>Due to an internal error the same code could have been
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generated more than one time. This happened for the
295
exclusive decode functionality.</p>
296
<p>Own Id: OTP-5378</p>
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<title>Asn1 1.4.4.4</title>
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<title>Fixed Bugs and Malfunctions</title>
307
<list type="bulleted">
309
<p>Empty objects caused problems. There was trouble when an
310
object set referenced imported objects that in turn
311
referenced imported types. Lacked support of
312
SelectionType in object. All these have been attended.</p>
313
<p>Own Id: OTP-5240</p>
319
<title>Improvements and New Features</title>
320
<list type="bulleted">
322
<p>Now it is possible to inline asn1 run-time functionality
323
in the module generated by the asn1 compiler. Thus, it
324
will be only one module doing all encoding/decoding.</p>
325
<p>Own Id: OTP-5243</p>
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<title>Asn1 1.4.4.3</title>
335
<title>Fixed errors and malfunctions</title>
336
<list type="bulleted">
338
<p>A class that was referenced in two steps caused a
339
compiler failure. It is now corrected.</p>
340
<p>Own Id: OTP-5103</p>
346
<title>Improvements and new features</title>
347
<list type="bulleted">
349
<p>Optionally make it possible to get the un-decoded rest along with
350
the return value. Compile with option <em>undec_rest</em>.</p>
351
<p>Own Id: OTP-5104</p>
358
<title>Asn1 1.4.4.2</title>
361
<title>Fixed errors and malfunctions</title>
362
<list type="bulleted">
364
<p>An error due to unchecked referenced imported type resulted
365
in missing tag in some table constraint cases. This error is
366
now corrected. Error occurred during decode in
367
<c>ber_bin optimized</c> version.</p>
368
<p>Own Id: OTP-5022</p>
375
<title>Asn1 1.4.4.1</title>
378
<title>Fixed errors and malfunctions</title>
379
<list type="bulleted">
381
<p>When a referenced value in another module in turn referenced a
382
defined value the compilation crashed. This is due to the new
383
routines for compilation, that external references are resolved
384
during compilation, and not by the order in which modules are
385
compiled. This error is now corrected.</p>
386
<p>Own Id: OTP-4970</p>
393
<title>Asn1 1.4.4</title>
396
<title>Fixed errors and malfunctions</title>
397
<list type="bulleted">
399
<p>Functionality for parameterized class is added. Parsing failures on
400
WithSyntax spec is corrected.</p>
401
<p>Own Id: OTP-4893</p>
404
<p>The failure due to Parameterized Type when parameter is an object
405
set is corrected.</p>
406
<p>Own Id: OTP-4894</p>
407
<p>Aux Id: OTP-4893</p>
410
<p>Object Identifier values with two components and the first was a
411
value reference failed due to parsing conflicts. Now it is
413
<p>Own Id: OTP-4895</p>
416
<p>The erroneous comparison of file name and asn1 module name could
417
cause compilation failure. The situation for this failure is rare,
418
it requires that other processes modifies the compiled file during
419
the compilation procedure. It is now fixed.</p>
420
<p>Own Id: OTP-4944</p>
421
<p>Aux Id: seq8429</p>
424
<p>Selective decode was ignored when exclusive decode spec in asn1
425
configfile was missing. Selective decode failed when the selected
426
type was the top type. These bugs are now removed.</p>
427
<p>Own Id: OTP-4953</p>
428
<p>Aux Id: seq8436</p>
431
<p>The test interface asn1ct:test/1,2,3 and asn1ct:value/2 failed for
432
open type and EXTERNAL. The bug is now removed.</p>
433
<p>Own Id: OTP-4955</p>
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<p>Aux Id: seq8438)</p>
437
<p>Two equal functions were generated for two components referencing
438
the same type when they were picked by the action "parts". The bug
440
<p>Own Id: OTP-4957</p>
441
<p>Aux Id: seq8434</p>
447
<title>Improvements and new features</title>
448
<list type="bulleted">
450
<p>INTEGER with named number list and ENUMERATED can now be sub
451
constrained with names from the names list.</p>
452
<p>Own Id: OTP-4917</p>
455
<p>Now there is support for SelectionType (X 680 section 29)</p>
456
<p>Own Id: OTP-4918</p>
459
<p>The compiler now resolves circular dependencies. When asn1 specs
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IMPORTS from each other so that there are circular dependencies.</p>
461
<p>Own Id: OTP-4919</p>
464
<p>Now is the asn1 type UTF8String supported. For user instructions
465
see documentation.</p>
466
<p>Own Id: OTP-4965</p>
473
<title>Asn1 1.4.3.1</title>
476
<title>Fixed Bugs and Malfunctions</title>
477
<list type="bulleted">
479
<p>The <c>{internal_error,...,{ unrecognized_type,...}}</c>
480
error occurring for a SET type when compiling with options
481
<c>[ber_bin,optimize,der]</c> is now corrected.</p>
482
<p>Own Id: OTP-4866</p>
485
<p>False encode of BIT STRING in PER (per_bin,optimize) is fixed. The error occurred when there was a type like BIT STRING (SIZE(C)) and C > 16.</p>
486
<p>Own Id: OTP-4869</p>
493
<title>Asn1 1.4.3</title>
496
<title>Fixed errors and malfunctions</title>
497
<list type="bulleted">
499
<p>Functionality to handle parameterized object sets have been added.</p>
500
<p>Own Id: OTP-4832</p>
503
<p>Bug causing duplicated function definitions using exclusive decode is removed.</p>
504
<p>Own Id: OTP-4833)</p>
507
<p>The race condition when loading asn1 driver is solved.</p>
508
<p>Own Id: OTP-4835</p>
514
<title>Improvements and new features</title>
515
<list type="bulleted">
517
<p>A specialized decode, <em>selective decode</em> is now available. It decodes a chosen internal sub-type of a constructed type.</p>
518
<p>Own Id: OTP-4856)</p>
525
<title>Asn1 1.4.2.2</title>
528
<title>Fixed errors and malfunctions</title>
529
<list type="bulleted">
531
<p>Release of Asn1 1.4.2.1 on R7B, The functionality is the same, but
532
the layer between the driver and the asn1 erlang code is different.</p>
539
<title>Asn1 1.4.2.1</title>
542
<title>Fixed errors and malfunctions</title>
543
<list type="bulleted">
545
<p>ObjectDescriptor does now work as part of a sequence, set or choice.</p>
546
<p>Own Id: OTP-4773</p>
549
<p>When a SEQUENCE that have extension mark was decoded inside a
550
SEQUENCE OF it could cause decode error due to a failure in
551
restbytes2. It is now corrected.</p>
552
<p>Own Id: OTP-4791)</p>
555
<p>Now the bug is fixed that caused the compiler crash on an untagged
556
optional open type.</p>
557
<p>Own Id: OTP-4792</p>
560
<p>The earlier exit caused by bad in-data is now fixed so it will
561
return an {error,Reason} tuple.</p>
562
return an {error,Reason} tuple.</p>
563
<p>Own Id: OTP-4797</p>
566
<p>Open type encoded with indefinite length is now correct decoded.</p>
567
<p>Own Id: OTP-4798</p>
570
<p>Now is absent optional open types handled correctly.</p>
571
<p>Own Id: OTP-4799</p>
574
<p>Now is the necessary functions available for sorting in run-time of
575
SET and SET OF components.</p>
576
<p>Own Id: OTP-4809</p>
583
<title>Asn1 1.4.2</title>
586
<title>Fixed errors and malfunctions</title>
587
<list type="bulleted">
589
<p>When a component in a SEQUENCE is a CHOICE (or reference to a CHOICE)
590
and the SEQUENCE's component and one of the alternatives in the CHOICE
591
have identical names, an error may occur if one doesn't use the
592
'optimized' versions of the compiler. In the older versions (<c>ber, ber_bin, per, per_bin</c>) one could optionally apply a value of a
593
component as <c>{ComponentName,Value}</c>, and the generated code
594
chooses the second element of the tuple. However, a value of a CHOICE
595
must be applied as a tuple: <c>{AlternativeName,Value}</c>. Thus,
596
in the rare case described above and if the value to the SEQUENCE's
597
component is not in a tuple notation the
598
<c>{AlternativeName,Value}</c> will be peeled off in the SEQUENCE
599
and the value fed to the CHOICE will only be the <c>Value</c>
600
part of <c>{AlternativeName,Value}</c>, and the encoder crashes.
601
The best way to avoid this is to use the optimized version of the
602
compiler where the unnecessary tuple notation
603
<c>{ComponentName,Value}</c> no longer is allowed. Since it isn't
604
possible to solve this bug in the compiler.</p>
605
<p>Own Id: OTP-4693</p>
611
<title>Improvements and new features</title>
612
<list type="bulleted">
614
<p>Exclusive decode is enabled by a compiler option and a configuration
615
file. It makes it possible to leave parts of an ASN.1 encoded message
617
<p>Own Id: OTP-4744</p>
624
<title>Asn1 1.4.1.1</title>
627
<title>Fixed errors and malfunctions</title>
628
<list type="bulleted">
630
<p>The documentation about how extensibility is handled is now corrected.</p>
631
<p>Own Id: OTP-4663</p>
634
<p>Function in object now calls the exported function</p>
635
<p>Own Id: OTP-4665</p>
638
<p>Now is tags for ObjectClassFieldType analyzed correctly.</p>
639
<p>Own Id: OTP-4666</p>
646
<title>Asn1 1.4.1</title>
649
<title>Fixed errors and malfunctions</title>
650
<list type="bulleted">
652
<p>Now is the Default value for an ENUMERATED returned as the name from
653
the NamedList when decoding.</p>
654
<p>Own Id: OTP-4633</p>
657
<p>It was an internal failure when permitted alphabet constraint existed
658
together with for instance a size constraint. E.g. when a
659
referenced type is constrained by a size constraint and the defined
660
type in turn is constrained by a permitted alphabet constraint.</p>
661
<p>Own Id: OTP-4559</p>
664
<p>Record is generated in hrl file for a CHOICE with extension mark
665
that has an internal SEQUENCE/SET definition.</p>
666
<p>Own Id: OTP-4560</p>
669
<p>Now is the length of a SEQUENCE/SET OF correctly encoded/decoded (PER).</p>
670
<p>Own Id: OTP-4590</p>
673
<p>The problem with unordered decoded terms when a component is a
674
ObjectClassFieldType has been solved.</p>
675
<p>Own Id: OTP-4591</p>
681
<title>Improvements and new features</title>
682
<list type="bulleted">
684
<p>More complex definitions with TableConstraints where the SimpleTable
685
and ComponentRelation are on different levels is now fully
687
<p>Own Id: OTP-4631</p>
694
<title>Asn1 1.4</title>
697
<title>Fixed errors and malfunctions</title>
701
<title>Improvements and new features</title>
702
<list type="bulleted">
704
<p>Each generated .erl file have now a function info/0 that returns
705
information about the used compiler version and options.</p>
706
<p>Own Id: OTP-4373</p>
709
<p>When compiling an ASN.1 module the compiler generates an Erlang module
710
that is compiled by the Erlang compiler. Earlier it was not possible to
711
add options to the final step, the Erlang compilation. By adding any
712
option that is not recognized as a specific ASN.1 option it will be
713
passed to the final step like: <c>erlc +debug_info Mymodule.asn</c> or
714
<c>asn1ct:compile('Mymodule',[debug_info])</c>.</p>
715
<p>Own Id: OTP-4491</p>
718
<p>Earlier one couldn't multi file compile modules that had different
719
tagdefault, which now is possible. Equal Type/Value names in different
720
modules are resolved by renaming (concatenate type name and module
721
name): If two types with the same name T exist in module A and module B
722
they will get the new names TA and TB.</p>
723
<p>(Own Id: OTP-4492)</p>
724
<p>Aux Id: OTP-3983</p>
727
<p>BER: Encode/decode of data have been significantly improved. By use of
728
the compiler options <c>ber_bin</c> and <c>optimize</c>,
729
optimized code will be generated and the optimized run-time module will
731
<p>Own Id: OTP-4493</p>
738
<title>Asn1 1.3.3.1</title>
741
<title>Fixed errors and malfunctions</title>
742
<list type="bulleted">
744
<p>Proper length encoding and padding implemented for a <c>BIT STRING</c> with
745
NamedNumberList and size constraint as value range. This functionality
746
didn't work in the rare occasion when the NamedNumberList is shorter
747
than the lower bound of the constraint.As in this example:
748
<c>TestS ::= BIT STRING {a (0),b (1)} (SIZE (3..8))</c></p>
749
<p>(Own Id: OTP-4353)</p>
752
<p>Bug in compiler, when an <c>OBJECT IDENTIFIER</c> value consisting of
753
two identifiers (Defined values or Name form identifiers) was falsely
754
interpreted causing a compiling error is now corrected.</p>
755
<p>(Own Id: OTP-4354)</p>
758
<p>Internal error in check phase that caused crash on
759
<c>ObjectClassFieldType</c> in ber_bin is corrected.</p>
760
<p>(Own Id: OTP-4390)</p>
763
<p>Tags for open types are handled according to <c>x.680 30.6c</c>, i.e.
764
open types shall not be tagged <c>IMPLICIT.</c></p>
765
<p>(Own Id: OTP-4395)</p>
766
<p>(Aux Id: OTP-4390)</p>
773
<title>Asn1 1.3.3</title>
776
<title>Fixed errors and malfunctions</title>
777
<list type="bulleted">
779
<p>Now gives the compiler an appropriate error report when exported
780
undefined types are detected.</p>
781
<p>(Own Id: OTP-4129)</p>
784
<p>The type <c>ObjectDescriptor</c> is now supported, previously the
785
implementation of encode/decode for this rarely used type was
787
<p>(Own Id: OTP-4161)</p>
788
<p>(Aux Id: seq7165)</p>
791
<p>In case of per and compact_bit_string the rightmost byte were erroneous
792
truncated when the rightmost bits of that byte were zeros. This is now
794
<p>(Own Id: OTP-4200)</p>
797
<p>Bad match of return-value from decode_length in skipvalue/3 has now been
799
<p>(Own Id: OTP-4232)</p>
802
<p>Now is decode of ENUMERATED handled correctly, when tagged EXPLICIT.</p>
803
<p>(Own Id: OTP-4234)</p>
806
<p>The compiler now parses and handles the ValueFromObject construct.</p>
807
<p>(Own Id: OTP-4242)</p>
810
<p>Now does the compiler handle the case when the object set in simple
811
table and componentrelation constraints is of a CLASS without a UNIQUE
812
field. In this case is the octets, which is assumed to be encoded,
813
encoded as an open type.</p>
814
<p>(Own Id: OTP-4248)</p>
815
<p>(Aux Id: OTP-4242)</p>
818
<p>Compiler handles objects in AdditionalElementSetSpec in ObjectSetSpec,
819
i.e. the objects that are referred to after the ellipses in an object set.</p>
820
<p>(Own Id: OTP-4275)</p>
823
<p>Now are values with a component of type CHOICE encoded with indefinite
824
length correctly decoded.</p>
825
<p>(Own Id: OTP-4358)</p>
831
<title>Improvements and new features</title>
832
<list type="bulleted">
834
<p>The language constructs (from the old 1988 standard) <c>ANY</c>
835
and <c>ANY DEFINED BY</c> are now implemented.</p>
836
<p>(Own Id: OTP-2741)</p>
837
<p>(Aux Id: seq 1188)</p>
840
<p>Now it is checked in run-time if a <c>OBJECT IDENTIFIER</c> value is invalid</p>
841
<p>(Own Id: OTP-4235)</p>
844
<p>The ASN.1 types EXTERNAL,EMBEDDED PDV and CHARACTER STRING now have full support in the compiler.</p>
845
<p>(Own Id: OTP-4247)</p>
848
<p>A driver in C does the final job (complete) of the PER encoding when
849
files are compiled with <c>per_bin</c> and <c>optimize</c> flags.
850
It gives significant faster encoding for PER.</p>
851
<p>(Own Id: OTP-4355)</p>
854
<p>Encode and decode of PER encoding has been made faster by moving
855
analysis done in run-time to compile-time. These optimizations are
856
available by compiling ASN.1 files with options <c>per_bin</c> and
858
<p>(Own Id: OTP-4381)</p>
859
<p>(Aux Id: OTP-4355)</p>
866
<title>Asn1 1.3.2</title>
869
<title>Fixed errors and malfunctions</title>
870
<list type="bulleted">
872
<p>Now does the compiler check values (including referenced values), and
873
formats the value so it is suitable to use as input to encoding
875
<p>(Own Id: OTP-3277)</p>
876
<p>(Aux Id: OTP-4103)</p>
879
<p>Unnecessary external function calls in generated code are now generated
880
as internal function calls.</p>
881
<p>(Own Id: OTP-4073)</p>
887
<title>Improvements and new features</title>
888
<list type="bulleted">
890
<p>Now is Information Objects supported in BER encoding.</p>
891
<p>(Own Id: OTP-3980)</p>
892
<p>(Aux Id: OTP-3979 OTP-3978)</p>
896
<p>PER: A new option <c>per_bin</c> is now supported. When used the
897
generated encode/decode functions use binaries and the bit syntax to
898
get better performance than the old <c>per</c> variant which used
899
lists. All values input to encode and returned from decode are
900
compatible between <c>per</c> and <c>per_bin</c> except for
901
open types which are represented as binaries with per_bin and octet
902
lists with per. We recommend that you use per_bin instead of per from
903
now on, the use of binaries will be the default in coming versions and
904
all improvements and optimizations for PER will be concentrated to that
906
<p>(Own Id: OTP-4094)</p>
910
<p>Support for DER implemented. Used by flag +der when compiling. Include
911
the full BER encoding plus: sorting of SET components, sorting of
912
encoded elements in SET OF, full check of default values in SET and
913
SEQUENCE. See new documentation on DER in user_guide sections 1.3.1;
914
1.4.11; 1.4.12; 1.4.14; 1.4.16 and 1.10, in the reference manual for
916
<p>(Own Id: OTP-4103)</p>
924
<title>Asn1 1.3.1</title>
927
<title>Fixed errors and malfunctions</title>
928
<list type="bulleted">
930
<p>Do not generate record in .hrl file for SET types</p>
931
<p>Own Id: OTP-4025</p>
934
<p>Fixed internal error when using BIT STRINGs with Named Number List in combination with <c>compact_bit_string</c> and <c>ber_bin</c> options.</p>
935
<p>Own Id: OTP-4026</p>
936
<p>Aux Id: OTP-3982</p>
939
<p>The atom 'com' can now be used in ENUMERATED as an EnumerationItem.</p>
940
<p>Own Id: OTP-4037</p>
941
<p>Aux Id: Seq 7036</p>
944
<p>ber: Now it is possible (again) to encode data format "{Type,Value}" in a SEQUENCE OF RequestParameter, when RequestParameter is of type ENUMERATED. The {Type,Value}
945
notation is not recommended for use, it is redundant and exist only for very ancient backwards compatibility reasons. The "feature" might be removed in forthcoming versions.</p>
946
<p>Own Id: OTP-4057</p>
947
<p>Aux Id: Seq 7066</p>
950
<p>A bug in the parser, that caused failure on COMPONENTS OF is now removed.</p>
951
<p>Own Id: OTP-4058</p>
958
<title>Asn1 1.3</title>
961
<title>Known problems</title>
962
<list type="bulleted">
964
<p>The compiler will now check that a value referenced by name
966
<p>Own Id: OTP-3277</p>
969
<p>BER:Decode of a type T ::= SEQUENCE OF C fails if C is encoded with indefinite length.
970
This is know corrected.</p>
971
<p>Own Id: OTP-3811</p>
972
<p>Aux Id: seq5040</p>
978
<title>Fixed errors and malfunctions</title>
979
<list type="bulleted">
981
<p>The new parser handles imports when one import ends with FROM, a modulename and a reference to a objectidentifier followed by imports from other modules.</p>
982
<p>Own Id: OTP-3463</p>
985
<p>The compiler did not check that a name mentioned as EXPORTED
986
actually is defined within the module.
987
This is now corrected.</p>
988
<p>Own Id: OTP-3659</p>
991
<p>Removed bug caused by use of nested indefinite length</p>
992
<p>Own Id: OTP-3994</p>
998
<title>Improvements and new features</title>
999
<list type="bulleted">
1001
<p>Now supporting most common use of parameterization according to X.683</p>
1002
<p>(Own Id: OTP-3978)</p>
1005
<p>PER: Now supporting most common use of Information Objects according to X.681. A new parser has been implemented. The error messages due to syntax errors are slightly different than previous. TableConstraint part of X.682 now also supported.</p>
1006
<p>Own Id: OTP-3979</p>
1009
<p>New compiler option added: <c>ber_bin</c>. The compiler generates code with new bit syntax. Run time functions uses bit syntax when feasible. Higher encoding/decoding performance in most cases. Se also comments for Asn1 1.2.9.3.</p>
1010
<p>Own Id: OTP-3981</p>
1013
<p>A more compact format of BIT STRING in Erlang is now available by use of the compiler option <c>compact_bit_string</c>. It is much faster when large BIT STRINGs are used.</p>
1014
<p>Own Id: OTP-3982</p>
1017
<p>Now possible to merge many ASN.1 input files to one Erlang file by use of a configuration file that lists the ASN.1 files.</p>
1018
<p>Own Id: OTP-3983</p>
1021
<p>New documentation in <em>User's Guide</em> in section:</p>
1022
<p>3.1: New compile-time functions and options are described.</p>
1023
<p>4.6: New compact format of BIT STRING is described.</p>
1024
<p>4.8: Additional comments on character strings.</p>
1025
<p>7: New section describing ASN.1 Information Objects.</p>
1026
<p>8: New section describing Parameterization.</p>
1027
<p><em>Reference Manual/asn1ct</em> New compile options are described.</p>
1028
<p>Own Id: OTP-3984</p>
1029
<p>Aux Id: OTP-3978, OTP-3979, OTP-3981, OTP-3982, OTP-3983</p>
1032
<p>Added the functionality to invoke ASN1Mod:encode (and decode).</p>
1033
<p>Own Id: OTP-3985</p>
1036
<p>Performance improvements by removing not necessary use of apply when calling asn1rt:encode. Also other general improvements.</p>
1037
<p>Own Id: OTP-3988</p>
1044
<title>Asn1 1.2.9.6</title>
1047
<title>Known problems</title>
1048
<list type="bulleted">
1050
<p>The compiler does not check that an exported name actually exists in the ASN.1 module.</p>
1051
<p>Own Id: OTP-3659</p>
1054
<p>The compiler does not check that a value referenced by name does exist.</p>
1055
<p>Own Id: OTP-3277</p>
1058
<p>BER: The compiler does not take the extensions into account when checking if
1059
the tags are unique in a SEQUENCE or SET.</p>
1060
<p>Own Id: OTP-3304</p>
1066
<title>Fixed errors and malfunctions</title>
1067
<list type="bulleted">
1069
<p>PER: Trailing zeroes in a BIT STRING declared without named bits
1070
should not be removed in the encodings.</p>
1071
<p>Own Id: OTP-3830</p>
1078
<title>Asn1 1.2.9.5</title>
1081
<title>Known problems</title>
1082
<p>Same as for 1.2.9.3.</p>
1086
<title>Fixed errors and malfunctions</title>
1087
<list type="bulleted">
1089
<p>PER: Constraints are not propagated when types are
1090
referring to each other. Example:</p>
1093
TBCD-STRING ::= OCTET STRING
1095
LAI ::= TBCD-STRING (SIZE(3)) </code>
1096
<p>The size constraint is not passed on during encode,decode
1097
resulting in wrong encoding for PER , it is
1098
coded with a length determinant which should not be there
1099
when the length is fixed. For BER this does not matter because the constraints does
1100
not affect the encodings.</p>
1101
<p>Own Id: OTP-3713</p>
1104
<p>The generated code gets wrong if there are several ENUMERATED fields in a SEQUENCE or SET, this is now corrected.</p>
1105
<p>Own Id: OTP-3796</p>
1108
<p>BER:Decode of a type T ::= SEQUENCE OF C fails if C is encoded with indefinite length.
1109
This is know corrected.</p>
1110
<p>Own Id: OTP-3811</p>
1117
<title>Asn1 1.2.9.3</title>
1120
<title>Known problems</title>
1121
<list type="bulleted">
1123
<p>The compiler does not check that an exported name actually exists in the ASN.1 module.</p>
1124
<p>Own Id: OTP-3659</p>
1127
<p>The compiler does not check that a value referenced by name does exist.</p>
1128
<p>Own Id: OTP-3277</p>
1131
<p>BER: The compiler does not take the extensions into account when checking if
1132
the tags are unique in a SEQUENCE or SET.</p>
1133
<p>Own Id: OTP-3304</p>
1139
<title>Fixed errors and malfunctions</title>
1140
<list type="bulleted">
1142
<p>This version supports soft upgrade from versions 1.2.6 1.2.7.</p>
1145
<p>In an ENUMERATED type like this:</p>
1147
\011\011T ::= ENUMERATED { blue, green} </code>
1148
<p>The symbols was encoded/decoded with the wrong values, i.e in
1149
reverse order. This is now corrected.</p>
1150
<p>Own Id: OTP-3700</p>
1153
<p>PER: OCTET STRING with Size constrained to a single value i.e fixed size
1154
was treated wrong during encode and decode. This is now corrected.</p>
1155
<p>Own Id: OTP-3701</p>
1161
<title>Improvements and new features</title>
1162
<list type="bulleted">
1164
<p>There is now a new compiler option <c>ber_bin</c> available that can be used to
1165
generate encode/decode functions for BER that uses the new "bit-syntax" to
1166
make the functions more efficient. The <c>ber_bin</c> option is used
1167
as an alternative to the <c>ber</c> and <c>per</c> options.</p>
1168
<p>The encode function then produces a
1169
possibly nested list of binaries and integer lists. The decode function does
1170
in this case require a single binary as input instead of a list.
1171
The modules generated with this option require that you have an R7A or later
1172
system, otherwise they will not compile and the runtime module asn1rt_ber_bin
1173
can not be executed.</p>
1174
<p>The ber_bin option is not officially supported in this version (will be
1175
in a later version) but is provided for those who want to try it.
1176
It should be significantly faster at decode and is slightly faster at encode.
1177
Exactly how performance differs between this binary approach and the
1178
list approach depends highly on the type of input.
1179
Another thing worth noting is that both approaches still have a lot of
1180
solutions in common which can be improved a lot to gain even better
1188
<title>Asn1 1.2.9.2</title>
1191
<title>Fixed errors and malfunctions</title>
1192
<list type="bulleted">
1194
<p>BER: Encode/decode of extension components did not work properly. This is now corrected.</p>
1195
<p>Own Id: OTP-3395</p>
1197
<p>PER:The encode/decode of NULL as an open type has been corrected. An open type must always have a length of at least 1 byte even if the contained
1198
value (e.g NULL) encodes to nothing.</p>
1199
<p>Own Id: OTP-3496</p>
1203
<p>BER:In the current implementation extension components of a SEQUENCE are required
1204
to be present when they are specified as mandatory. This is an error, all extension
1205
components are "optional" even if they are not specified to have the OPTIONAL or
1206
DEFAULT property. This is now corrected.</p>
1207
<p>Own Id: OTP-3278</p>
1213
<title>Improvements and new features</title>
1214
<list type="bulleted">
1216
<p>The ASN.1 language feature <c>COMPONENTS OF</c> is now implemented.</p>
1217
<p>Own Id: OTP-2515</p>
1220
<p>The encoding and decoding of ENUMERATED and
1221
INTEGER with NamedNumbers is made more efficient and thus
1222
faster in runtime.</p>
1223
<p>Own Id: OTP-3464</p>
1227
<p>Added support for encode/decode of open type which is
1228
constrained to a specific type. Previously the value of
1229
an open type had to be a list of octets, but now the Erlang
1230
representation of the specific type used in the constraint
1231
is used both as input to encode and as output from decode.</p>
1232
<p>Own Id: OTP-3569</p>
1236
<p>PER: GeneralString, GraphicalString etc. i.e all strings
1237
that are not so called "known-multiplier character
1238
string types" are now supported by the runtime
1239
encode/decode functions.</p>
1240
<p>Own Id: OTP-3573</p>
1248
<title>Asn1 1.2.6</title>
1251
<title>Known problems</title>
1252
<list type="bulleted">
1254
<p>The ASN.1 language feature <c>COMPONENTS OF</c> is not implemented.</p>
1255
<p>Own Id: OTP-2515</p>
1258
<p>The compiler does not check that a value referenced by name does exist.</p>
1259
<p>Own Id: OTP-3277</p>
1262
<p>BER:In the current implementation extension components of a SEQUENCE are required
1263
to be present when they are specified as mandatory. This is an error, all extension
1264
components are "optional" even if they are not specified to have the OPTIONAL or
1265
DEFAULT property.</p>
1266
<p>Own Id: OTP-3278</p>
1269
<p>BER: The compiler does not take the extensions into account when checking if
1270
the tags are unique in a SEQUENCE or SET.</p>
1271
<p>Own Id: OTP-3304</p>
1277
<title>Fixed errors and malfunctions</title>
1278
<list type="bulleted">
1280
<p>This version supports soft upgrade from versions 1.1.1, 1.1.5 and 1.1.6.
1281
Two new runtime modules <c>asn1rt_ber_v1</c> and
1282
<c>asn1rt_per_v1</c> are delivered together with the old ones. This makes
1283
it possible to continue running applications with modules generated with the
1284
previous version of the asn1 compiler while modules generated by this version
1285
will use the new runtime modules. Note that it is only advice-able to continue
1286
running old generates if they are working perfectly and have no need
1287
for the corrections made in this version of the asn1 application.</p>
1290
<p>BER: SEQUENCEs encoded with indefinite length was not correctly decoded.
1291
This in now corrected.</p>
1292
<p>Own Id: OTP-3352</p>
1293
<p>Aux Id: Seq 4100</p>
1300
<title>Asn1 1.2.4</title>
1303
<title>Fixed errors and malfunctions</title>
1304
<list type="bulleted">
1306
<p>The compiler now detects multiple definitions of values and types and reports this as
1307
an error. Previously this was detected when the generated Erlang module was compiled.</p>
1308
<p>Own Id: OTP-3105</p>
1311
<p>BER: An error regarding encoding of <c>ENUMERATED</c> present in asn1-1.1.1
1312
is corrected. The new version 1.1.2 of asn1 containing this correction is
1313
delivered as a "patch".</p>
1314
<p>Own Id: OTP-3169</p>
1317
<p>BER: Decoding of <c>SEQUENCE OF</c> and <c>SET OF</c> with indefinite length is corrected.
1318
The correction was first delivered in version 1.1.2.</p>
1319
<p>Own Id: OTP-3170</p>
1322
<p>BER: Encoding and decoding of <c>ENUMERATED</c>
1324
"..." did not work (crashed with a runtime error). This
1325
has now been corrected. If an unknown enumerated value is
1326
decoded (for an extensible enumerated type)
1327
it is returned as <c>{asn1_enum,Value}</c> where
1328
<c>Value</c> is an integer. Enumerated values in this format
1329
are also accepted by the encoder.
1330
ASN.1 modules containing
1331
<c>ENUMERATED</c> with extensionmark should be
1332
recompiled with the corrected
1333
version of the compiler. The BER runtime functions are also
1335
Note that this correction has already been delivered as a
1336
bugfix for R4B (OTP-2951).</p>
1337
<p>Own Id: OTP-3202</p>
1338
<p>Aux Id: Seq3745</p>
1341
<p>BER: The primitive/constructed bit in the tag byte of an encoding
1342
is not correct when it comes to user defined tags.
1345
T ::= [2] SEQUENCE { a BOOLEAN} </code>
1346
<p>the tag 2 does not get the constructed bit set which it should.
1347
This is now corrected.</p>
1348
<p>Own Id: OTP-3241</p>
1351
<p>The decoder can now detect if there are unexpected bytes
1352
remaining when all components of a sequence are decoded.
1353
The decoder will then return <c>{error,{asn1{unexpected,Bytes}}}</c></p>
1354
<p>Own Id: OTP-3270</p>
1357
<p>Values of type <c>OBJECT IDENTIFIER</c> was sometimes returned as an Erlang list
1358
(ASN.1 constants) and sometimes as a tuple (from the decode functions). This is now
1359
changed so that <c>OBJECT IDENTIFIER</c> values always are represented as an Erlang
1361
<p>Own Id: OTP-3280</p>
1364
<p>PER:The encode/decode functions could not handle integers with
1365
a range greater than 16#7ffffff. This limit is now removed.</p>
1366
<p>Own Id: OTP-3287</p>
1369
<p>PER: The encoding/decoding of the length for a SET OF/SEQUENCE OF
1370
was wrong if there was a size constraint. This is now corrected.</p>
1371
<p>Own Id: OTP-3291</p>
1374
<p>PER: Encoding of a constrained INTEGER (range > 16 k) was wrong for
1375
the value 0. This is now corrected.</p>
1376
<p>Own Id: OTP-3306</p>
1382
<title>Improvements and new features</title>
1383
<list type="bulleted">
1385
<p>The ASN.1 module name and the filename where the ASN.1
1386
specification resides must match each other (has always been the
1387
case). This is now checked by the compiler. The check requires that
1388
the names match in a case or case insensitive way depending on the
1389
characteristics for the current system.</p>
1390
<p>Own Id: OTP-1843</p>
1393
<p>PER: Encode/decode of an extension value (i.e not within the root set) for
1394
<c>ENUMERATED</c> did not work properly. This is now corrected.
1395
If an unknown enumerated value is
1396
decoded (for an extensible enumerated type)
1397
it is returned as <c>{asn1_enum,Value}</c> where
1398
<c>Value</c> is an integer. Enumerated values in this format
1399
are also accepted by the encoder (if the value is >= the number of known
1400
extension values).</p>
1401
<p>Own Id: OTP-2930</p>
1404
<p>Unnecessary printouts from the compiler are removed.
1405
The compiler version and the compiler options are now
1406
printed to stdout.</p>
1407
<p>Own Id: OTP-3276</p>
1410
<p>In order to better suite the use of ASN.1 in embedded systems only
1411
the modules needed in runtime are now listed in the <c>.app</c> file.</p>
1412
<p>Own Id: OTP-3279</p>
1415
<p>The compiler now supports extensionmarker in constraint specifications.
1418
INTEGER (0..10, ...) </code>
1419
<p>In previous version this was reported as a syntax error.</p>
1420
<p>Own Id: OTP-3281</p>
1423
<p>A very limited part of ITU-T recommendation X.681
1424
Abstract Syntax Notation One (ASN.1): Information
1425
object specification is now implemented. Specifically \011
1426
TYPE IDENTIFIER is recognized by the compiler.</p>
1427
<p>Own Id: OTP-3325</p>
1430
<p>Parameterization of ASN.1 specifications (ITU-T X.683) is now
1431
supported to a limited extent.</p>
1432
<p>Own Id: OTP-3326</p>
1439
<title>Asn1 1.1.3.1</title>
1442
<title>Fixed errors and malfunctions</title>
1443
<list type="bulleted">
1445
<p>BER Encoding and decoding of <c>ENUMERATED</c>
1447
"..." did not work (crashed with a runtime error). This
1448
has now been corrected. If an unknown enumerated value is
1449
decoded (for an extensible enumerated type)
1450
it is returned as <c>{asn1_enum,Value}</c> where
1451
<c>Value</c> is an integer. Enumerated values in this format
1452
are also accepted by the encoder.
1453
ASN.1 modules containing
1454
<c>ENUMERATED</c> with extensionmark should be
1455
recompiled with the corrected
1456
version of the compiler. The BER runtime functions are also
1458
Note that this correction has already been delivered as a
1459
bug-fix for R4B (OTP-2951).</p>
1460
<p>Own Id: OTP-3202</p>
1461
<p>Aux Id: Seq3745</p>
1468
<title>Asn1 1.1.1</title>
1471
<title>Known problems</title>
1472
<list type="bulleted">
1474
<p>The syntactic construct <c>COMPONENTS OF</c> is not
1476
<p>Own Id: OTP-2515</p>
1479
<p><c>ANY</c> and <c>ANY DEFINED BY</c> are currently not
1481
<p>Own Id: OTP-2741</p>
1482
<p>Aux Id: seq 1188</p>
1485
<p>Multiple definitions of the same Type or Value is not detected
1486
by the compiler. The error occurs when the generated Erlang
1487
module is compiled.</p>
1488
<p>Own Id: OTP-3105</p>
1495
<title>Asn1 1.1</title>
1498
<title>Known problems</title>
1499
<list type="bulleted">
1501
<p>The primitive/constructed bit in the tag byte of an encoding
1502
is not correct when it comes to user defined tags.
1505
T ::= [2] SEQUENCE { a BOOLEAN} </code>
1506
<p>the tag 2 does not get the constructed bit set which it should.
1507
This is now corrected.</p>
1508
<p>Own Id: OTP-3241</p>
1514
<title>Fixed errors and malfunctions</title>
1515
<list type="bulleted">
1517
<p>The BER decoder failed to decode certain nested data types
1518
where <c>IMPLICIT</c> tags where involved.
1519
This is now corrected.</p>
1520
<p>Own Id: OTP-2719</p>
1521
<p>Aux Id: seq 1148</p>
1524
<p>The handling of types with extension marker "..." is corrected.
1525
Earlier each SEQUENCE and SET with an extension marker got an
1526
extra field named <c>asn1_EXT</c> in the generated record.
1527
This was a mistake and that field is now removed (concerns
1528
both BER and BER).</p>
1529
<p>Own Id: OTP-2724</p>
1530
<p>Aux Id: seq 1148, OTP-2719</p>
1533
<p>The decoder (both BER and PER) could not handle unnamed
1534
bits of a <c>BIT STRING</c> if the type had any
1535
named bits declared. This is now corrected and the unnamed
1536
bits are returned as <c>{bit,Pos}</c> where Pos is the bit
1537
position. The <c>{bit,Pos}</c> can be used as input to the
1539
<p>Own Id: OTP-2725</p>
1540
<p>Aux Id: seq 1148,OTP-2719,OTP-2724</p>
1543
<p>The functions <c>asn1rt:decode</c> and <c>asn1ct:decode</c>
1544
did not always return <c>{ok,Result}</c> or
1545
<c>{error,Reason}</c> as documented. This is now corrected.</p>
1546
<p>Own Id: OTP-2730</p>
1547
<p>Aux Id: seq 1158</p>
1550
<p>The compiler did not accept CHOICE types as components
1551
of a SEQUENCE or SET when
1552
the modules tag default was IMPLICIT.
1555
C ::= CHOICE { ......}
1557
a [1] C, -- This was not accepted
1559
<p>This was an error
1560
caused by a misinterpretation of the ASN.1 standard. This
1561
is now corrected.</p>
1562
<p>Own Id: OTP-2731</p>
1563
<p>Aux Id: seq 1163</p>
1566
<p>When decoding a SEQUENCE A which contains an OPTIONAL component
1567
b which is a SEQUENCE with mandatory components, the decoder
1568
does not detect as an error that a mandatory component of b
1569
is missing. The same error could occur also in other cases
1570
with nested types and optional components of SEQUENCE or SET.
1571
This is now corrected.</p>
1572
<p>Own Id: OTP-2738</p>
1573
<p>Aux Id: seq 1183</p>
1576
<p>BER Encoding and decoding of <c>ENUMERATED</c>
1578
"..." did not work (crashed with a runtime error). This
1579
has now been corrected. If an unknown enumerated value is
1580
decoded (for an extensible enumerated type)
1581
it is returned as <c>{asn1_enum,Value}</c> where
1582
<c>Value</c> is an integer. Enumerated values in this format
1583
are also accepted by the encoder.
1584
ASN.1 modules containing
1585
<c>ENUMERATED</c> with extensionmark should be
1586
recompiled with the corrected
1587
version of the compiler. The BER runtime functions are also
1589
<p>Own Id: OTP-2951</p>
1590
<p>Aux Id: Seq 1446 OTP-2929</p>
1593
<p>The compiler does now accept all valid value notations
1594
for the OBJECT IDENTIFIER type. The generated code for
1595
those values is also corrected.</p>
1596
<p>Own Id: OTP-3059</p>
1602
<title>Improvements and new features</title>
1603
<list type="bulleted">
1605
<p>The code generated for BER is significantly enhanced resulting
1606
in less code and around 300% better performance in runtime
1607
for the encoding of complex ASN.1 values. The performance of
1608
decoding is unchanged.</p>
1609
<p>Own Id: OTP-2806</p>
1616
<title>Asn1 1.0.3</title>
1619
<title>Fixed errors and malfunctions</title>
1620
<list type="bulleted">
1622
<p>The <c>asn1.app</c> file is corrected.</p>
1623
<p>Own Id: OTP-2640</p>
1626
<p>The encoding of integers in BER did not comply with the
1627
standard for all values. The values was not encoded
1628
in the minimum number of octets as required. This is
1629
now corrected in the runtime module <c>asn1rt_ber</c>.</p>
1630
<p>Own Id: OTP-2666</p>
1636
<title>Improvements and new features</title>
1637
<list type="bulleted">
1639
<p>The compiler now generates explicit exports directives for
1641
functions that should be exported (instead of -compile(export_all)).
1642
This eliminates the warnings from the Erlang compiler when
1645
<p>Own Id: OTP-1845</p>
1652
<title>R3B02 (Asn1 1.0.2)</title>
1655
<title>Fixed errors and malfunctions</title>
1656
<list type="bulleted">
1658
<p>The decoding of a BER encoded SEQUENCE with optional component
1659
of type SEQUENCE (also with optional components) could result
1660
in an error or wrong result if the tags are equal.</p>
1661
<p>Own Id: OTP-2226</p>
1664
<p>The encoding of (PER) SEQUENCE with extensionmark was wrong.
1665
This is now corrected.</p>
1666
<p>Own Id: OTP-2349</p>
1673
<title>R3A (Asn1 0.9)</title>
1676
<title>Fixed errors and malfunctions</title>
1677
<list type="bulleted">
1679
<p>The asn1 compiler now detects the use of an implicit tag before <c>CHOICE</c> as an error (in accordance with the standard)</p>
1680
<p>Own Id: OTP-1844</p>
1683
<p>An OPTIONAL CHOICE embedded in SEQUENCE when BER coding
1684
caused an error when generating decode code. This is now
1686
<p>Own Id: OTP-1857</p>
1687
<p>Aux Id: OTP-1848</p>
1694
<title>1 ASN1 0.8.1</title>
1695
<p>This is the first release of the ASN1 application. This version is
1696
released for beta-testing. Some functionality will be added until the
1697
1.0 version is released. See the release notes for the latest version
1698
for the exact details about new features. A list of missing features
1699
and restrictions can be found in the chapter below.</p>
1702
<title>1.1 Missing features and other restrictions</title>
1704
<list type="bulleted">
1706
<p>The encoding rules BER and PER (aligned) is supported. <em>PER (unaligned) IS NOT SUPPORTED</em>.</p>
1709
<p>NOT SUPPORTED types <c>ANY</c> and <c>ANY DEFINED BY</c>
1710
(is not in the standard any more).</p>
1713
<p>NOT SUPPORTED types <c>EXTERNAL</c> and <c>EMBEDDED-PDV</c>. </p>
1716
<p>NOT SUPPORTED type <c>REAL</c> (planned to be implemented). </p>
1719
<p>The code generation support for value definitions in the ASN.1 notation is very limited
1720
(planned to be enhanced).</p>
1723
<p>The support for constraints is limited to:</p>
1726
<list type="bulleted">
1728
<p>SizeConstraint SIZE(X)</p>
1731
<p>SingleValue (1)</p>
1734
<p>ValueRange (X..Y)</p>
1737
<p>PermittedAlpabet FROM (but not for BMPString and UniversalString when generating PER).</p>
1740
<p>Complex expressions in constraints is not supported (planned to be extended).</p>
1743
<p>The current version of the compiler has very limited error checking:</p>
1746
<p>Stops at first syntax error.</p>
1749
<p>Does not stop when a reference to an undefined type is found ,
1750
but prints an error message. Compilation of the generated
1751
Erlang module will then fail.</p>
1754
<p>A whole number of other semantical controls is currently
1755
missing. This means that the compiler will give little
1756
or bad help to detect what's wrong with an ASN.1
1757
specification, but will mostly work very well when the
1758
ASN.1 specification is correct.</p>
1761
<list type="bulleted">
1763
<p>The maximum INTEGER supported in this version is a
1764
signed 64 bit integer. This limitation is probably quite
1765
reasonable. (Planned to be extended).</p>
1768
<p>Only AUTOMATIC TAGS supported for PER.</p>
1771
<p>Only EXPLICIT and IMPLICIT TAGS supported for BER.</p>
1774
<p>The compiler supports decoding of BER-data with indefinite
1775
length but it is not possible to produce data with indefinite
1776
length with the encoder.</p>
added
removed
lib/asn1/doc/src/notes_history.xml
