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IDProjectCategoryView StatusDate SubmittedLast Update
0005489Part 06: TTCN-3 Control InterfaceTechnicalpublic22-03-2010 14:3025-03-2010 10:54
ReporterAndrus Lehtmets 
Assigned ToIna Schieferdecker 
PriorityhighSeveritymajorReproducibilityhave not tried
StatusclosedResolutionfixed 
PlatformOSOS Version
Product Version 
Target Versionv4.2.1 (published 2010-07)Fixed in Versionv4.2.1 (published 2010-07) 
Summary0005489: TCI C++ mapping fixes
DescriptionTCI C++ mapping fixes separated from TRI ones. Fixes are agreed with MTP and INRIA.
TagsNo tags attached.
Clause Reference(s)TCI C++ mapping, part 6
Source (company - Author) Elvior
Attached Filesdoc file icon CPP_Mapping_Fixes_for_TCI.doc [^] (26,624 bytes) 22-03-2010 14:30
zip file icon es_20187306v040103.zip [^] (1,360,255 bytes) 25-03-2010 10:53

- Relationships
related to 0005485closedIna Schieferdecker Part 05: TTCN-3 Runtime Interface  C++ mapping issues in TRI and TCI specifications (v. 4.1.1) 
related to 0005885closedIna Schieferdecker Part 06: TTCN-3 Control Interface Inconsistency in mapping UniversalCharstringValue (implies platform dependency) 

-  Notes
(0009244)
Raul Alfonso (reporter)
22-03-2010 15:59

 MTP is disagreed with the point 2.3 of the document. For us,

  typedef wchar_t TuniversalChar

is OK.
(0009247)
Andrus Lehtmets (reporter)
23-03-2010 08:04

 "The width of wchar_t is compiler-specific and can be as small as 8 bits. Consequently, programs that need to be portable across any C or C++ compiler should not use wchar_t for storing Unicode text." (http://en.wikipedia.org/wiki/Wide_character [^])

TuniversalChar type should not be derived from wchart_t, because the size of individual characters of TTCN-3 universal charstrings is 4 bytes. Therefore TuniversalChar should be derived from 4 bytes instead:

either like in C mapping
Universal Char typedef unsigned char TciUCValue[4]
or like Elvior proposed:
typedef unsigned long TuniversalChar
(0009248)
Ina Schieferdecker (reporter)
23-03-2010 08:07
edited on: 24-03-2010 16:15

 Single characters are miscellaneous types for that purpose only. Still, single characters are treated differently in the mappings:
 
Java
    Tchar --> char
    Tuniversalchar --> int
 
C
    Tchar --> char
    Tuniversalchar --> TciUCValue
 
C++
    Tchar --> char
    Tuniversalchar --> wchar_t

The simplest seems to be to agree on integer types (32 bits are enough).
(0009253)
Raul Alfonso (reporter)
23-03-2010 11:03

 wchar_t shall be as wide as necessary to hold the largest character in the code sets of the locales that an implementation supports. If one platform doesn't support all characters of ISO/IEC 10646, wchar_t will not be able to handle all characters, but I think it is a platform (or c++ compiler) restriction, not a problem in C++ mapping.
wchar_t was introduced to represent wide char and I don't see any reason to not use this type.
For example, Tinteger can not work with "all integer" and it is not a problem
(0009254)
Andrus Lehtmets (reporter)
23-03-2010 11:46

 Elvior is strongly against using wchar_t. We support Ina's suggestion to use 32 bits integer types there.
more information about problems and sizes of wchar_t when using different compilers could be found at http://hristov.com/oblog/blog/post/2009/04/07/of-wchar_t/ [^]
(0009260)
Ina Schieferdecker (reporter)
23-03-2010 12:58
edited on: 24-03-2010 16:16

 This would mean

Java
    Tchar --> char
    Tuniversalchar --> int
 
C
    Tchar --> char
    Tuniversalchar --> long
 
C++
    Tchar --> char
    Tuniversalchar --> long

Please let the STF know if that is ok.
(0009268)
Ina Schieferdecker (reporter)
23-03-2010 16:22

 Implemented with the following changes:

- AddressType is not a class template but a class

- using operator== instead of equals

- removed the explicitly assigned constants in 10.5.2.14 TciTypeClass as that is still under discussion

- missing semicolons were already added

- change to the mapping of universal character (in chapter 10.5.1) still open as it is under discussion
(0009285)
Ina Schieferdecker (reporter)
24-03-2010 16:16

 Agreement was finally to go for

Java
    Tchar --> char
    Tuniversalchar --> int
 
C
    Tchar --> char
    Tuniversalchar --> wchar_t
 
C++
    Tchar --> char
    Tuniversalchar --> wchar_t

- Issue History
Date Modified Username Field Change
22-03-2010 14:30 Andrus Lehtmets New Issue
22-03-2010 14:30 Andrus Lehtmets File Added: CPP_Mapping_Fixes_for_TCI.doc
22-03-2010 14:30 Andrus Lehtmets Clause Reference(s) => TCI C++ mapping, part 6
22-03-2010 14:30 Andrus Lehtmets Source (company - Author) => Elvior
22-03-2010 14:56 Ina Schieferdecker Relationship added related to 0005485
22-03-2010 15:50 Ina Schieferdecker Project TTCN-3 Change Requests => Part 06: TTCN-3 Control Interface
22-03-2010 15:50 Ina Schieferdecker Status new => assigned
22-03-2010 15:50 Ina Schieferdecker Assigned To => Ina Schieferdecker
22-03-2010 15:59 Raul Alfonso Note Added: 0009244
22-03-2010 16:18 Gyorgy Rethy Priority normal => high
22-03-2010 16:18 Gyorgy Rethy Target Version => Edition 4.2.1 (not yet published)
23-03-2010 08:04 Andrus Lehtmets Note Added: 0009247
23-03-2010 08:07 Ina Schieferdecker Note Added: 0009248
23-03-2010 11:03 Raul Alfonso Note Added: 0009253
23-03-2010 11:46 Andrus Lehtmets Note Added: 0009254
23-03-2010 12:58 Ina Schieferdecker Note Added: 0009260
23-03-2010 16:22 Ina Schieferdecker Note Added: 0009268
23-03-2010 16:37 Ina Schieferdecker File Added: es_20187306v040103.zip
24-03-2010 16:15 Ina Schieferdecker Note Edited: 0009248
24-03-2010 16:15 Ina Schieferdecker Note Edited: 0009260
24-03-2010 16:16 Ina Schieferdecker Note Edited: 0009260
24-03-2010 16:16 Ina Schieferdecker Note Added: 0009285
24-03-2010 16:18 Ina Schieferdecker File Deleted: es_20187306v040103.zip
24-03-2010 16:19 Ina Schieferdecker File Added: es_20187306v040103.zip
24-03-2010 16:20 Ina Schieferdecker Assigned To Ina Schieferdecker => Gyorgy Rethy
24-03-2010 16:20 Ina Schieferdecker Status assigned => resolved
24-03-2010 16:20 Ina Schieferdecker Resolution open => fixed
24-03-2010 16:20 Ina Schieferdecker Fixed in Version => Edition 4.2.1 (not yet published)
24-03-2010 16:48 Ina Schieferdecker File Deleted: es_20187306v040103.zip
24-03-2010 16:48 Ina Schieferdecker File Added: es_20187306v040103.zip
25-03-2010 10:53 Ina Schieferdecker File Deleted: es_20187306v040103.zip
25-03-2010 10:53 Ina Schieferdecker File Added: es_20187306v040103.zip
25-03-2010 10:54 Ina Schieferdecker Assigned To Gyorgy Rethy => Ina Schieferdecker
25-03-2010 10:54 Ina Schieferdecker Status resolved => closed
25-05-2011 18:04 Ina Schieferdecker Relationship added related to 0005885

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