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When client modules are paired with a Toolbox that doesn't support the
Toolbox_Memory SWI the mem functions fall back to using calloc, free, and a
local implementation of realloc via OS_Module 13. These variants are also used
by Toolbox itself for allocations prior to being linked into the module chain.

However, the CLib now allocates extra to record private information behind the
allocation so mem must either call calloc/free/realloc *or* OS_Module 6/7/13,
not a mixture of the two.

Since realloc from a module is broken in the CLib built into RISC OS 3.10, we opt
to call OS_Module 6/7 to avoid needing to consider that bug.

Version 0.29. Tagged as 'tboxlib-0_29'

This allows <Lib$Dir>.tboxlibint to be removed from our command line include
path. Henceforth, clients of this library also won't need to put it (or
C:tboxlibint) in their command line include paths either. It also means that
when building the library, only local copies of header files are used (as
opposed to a mixture of local and exported copies, as previously).

Version 0.28. Tagged as 'tboxlib-0_28'

Detail:
  Added definitions for Message_ColourPickerColourChanged.
  Added definitions for ResetColourRequest.

Version 0.27. Tagged as 'tboxlib-0_27'

Pointer 'e' can't be returned as it's an argument to the function, so don't assign a result to it.
Found by cppcheck.
Tagged as Common-0_26-1 since no net code change.

C version of the definition from Hdr:Messages.

Version 0.26. Tagged as 'Common-0_26'

Version 0.25. Tagged as 'Common-0_25'

Everything TboxMake did can now be done with the makefiles in BuildSys.
Header file services.h was just a proxy for Global/Services.h.
style.h:
  Corrections to constants from the Style Guide. These two values are unused, so mainly academic.
messages.c/objmodule.c/string32.c:
  Unused services.h removed.

Version 0.24. Tagged as 'Common-0_24'

Version 0.23. Tagged as 'Common-0_23'

Resource areas now use ${TARGET} to match the other shared makefiles and the change made for the resources phase in revision 4.9.
Should fix problem with TextGadgets RAM version, where it was naming the area after the component name.

Version 0.22. Tagged as 'Common-0_22'

Matches CModule and AAsmModule shared makefiles.
Retagged as Common-0_21.

Version 0.21. Tagged as 'Common-0_21'

Detail:
  TboxMake - Toolbox modules will now generate a symbols file during the ROM link phase. The file will be copied to the modules install folder, allowing it to be easily picked up by debugging tools.
Admin:
  Tested with BCM2835, OMAP3 & Disc builds


Version 0.20. Retagged as 'Common-0_20'

Fixes empty !System.310.Modules.Toolbox directory in recent PlingSystem builds.

Version 0.20. Tagged as 'Common-0_20'

Detail:
  TboxMake - The ${ROM_MODULE} target had a dependency against ${C_ABSSYM}, but the shared C library only exports that file during the rom_link phase, preventing the toolbox 'rom' phases from completing properly.
  Additionally the rom_link phase in TboxMake didn't have a dependency on ${ROM_MODULE}, so any changes to the module (or previous failure to build) would prevent the rom-linked version of the module from being created or updated properly.
Admin:
  Tested with building OMAP3Live from clean.
  ROM image built OK but untested at runtime.


Version 0.19. Tagged as 'Common-0_19'

Rather than refactor every toolbox module that uses TBoxMake, and since that already carries its own rules for resources and RAM and debug builds, it seems simpler to just create a new ROM and link target than try to use CModule shared makefile.
Participated in a ROM build, but not functionally tested.

Version 0.18. Tagged as 'Common-0_18'

Version 0.17. Tagged as 'Common-0_17'

Version 0.16. Tagged as 'Common-0_16'

The error base and, where possible, error numbers are set to be the same as used in the RISC OS Ltd version of the TextGadgets module.

Version 0.15. Tagged as 'Common-0_15'

Detail:
  Use the XWIPE macro rather than WIPE so that when the component
  is cleaned, we don't get loads of irritating errors from AMU if
  the object to be wiped doesn't exist.
Admin:
  No code change.


Version 0.14. Tagged as 'Common-0_14'

In conjunction with a new BuildSys, this makefile removes the requirement for all Toolbox components to define the TARGET symbol.

Detail:
  This version now builds with cc-5_45. Note: it has not been verified as
  actually functioning correctly.
Admin:
  Tested in DSL Baseline build.

Version 0.13. Tagged as 'Common-0_13'

Detail:
  Numerous instances of '#include "objects.window.h"' replaced with
  correct '#include "objects/window.h".
Admin:
  Tested on RiscPC (APCS-32 Ursula environment).


Version 0.12. Tagged as 'Common-0_12'

Version 0.11. Tagged as 'Common-0_11'

Detail:
  The rewrite of ABSSYM to use c_abssym (to avoid link errors in Window)
    got lost between my testing and the last checkin.  This version has
    it.
Admin:
  Required by Window 1.64

Version 0.10. Tagged as 'Common-0_10'

  Extra shared facilities for object modules.
  Debug support improved.
Detail:
  New common operations for Toolbox object modules have been abstracted
    into this component in order to simplify the object modules.
  Debugging services made common to all modules and now uses DebugLib.
  Common Makefile fragment now exported with correct rules for ROM builds
    as well as RAM builds, and (new in this version), DebugLib RAM builds.
    As a result, all object modules now have debug versions available.
Admin:
  Requires BuildSys 1.92 or later (RiscOS/BuildSys; tag BuildSys-1_92)
  Requires Library 0.41 or later (RiscOS/Library; tag Library-0_41)
  Required by any Toolbox object module dated 4th May 2000 or later.

Version 0.09. Tagged as 'Common-0_09'

  Exports LibVersion
Admin:
  Required by future versions of toolbox modules..

Version 0.08. Tagged as 'Common-0_08'

Admin:
  Built.

Version 0.07. Tagged as 'Common-0_07'

Detail:
  Symbols in Hdr:SWIs are now correct.
Admin:
  Requires HdrSrc 0.61 or later.
  Required by Window 1.62 and later.

Version 0.06. Tagged as 'Common-0_06'

  C headers protect their definitions of service calls to avoid clashes
Detail:
  Exported headers contain SWI definitions only.
  Exported C headers protect their definitions of service call symbols
    to avoid clashes with Global/Services.h (which will contain them
    all from the next source drop)
Admin:
  Tested with the Window module.

Version 0.05. Tagged as 'Common-0_05'

Detail:
  I keep finding declarations of the Toolbox SWI symbols all over the
    place.  These header files provide a single definition for the SWIs
    for the Toolbox and Window modules.
Admin:
  Exported from Common because Libs is too awkward to modify just for
    this change (it uses Makatic).

Changed validation strings for ActionButton to include "AA~A". Java requires input focus to be set on ActionButtons, y'see, but we don't actually want them writable.

Version 0.04. Tagged as 'Common-0_04'

THICK_WRITABLE_BORDERS macro introduced to control thick borders on writable gadgets (surprisingly).

Detail:
  Validation string for icons implementing writable gadgets now contains
    "Pptr_write;R5;C//0/0/0/0" if THICK_WRITABLE_BORDERS is defined.
    This should alleviate flicker on STB3.
Admin:
  Tested briefly.
  Used by RiscOS/Sources/Toolbox/Window (tag: Window-1_59 and later)

Version 0.03. Tagged as 'Common-0_03'

Detail:
  Renamed (meaningless) formal parameter "template" in function declarations.
  Renamed other variables in the C sources too.
  Stops C compiler moaning about the use of symbols reserved for C++.
Admin:
  Required by Toolbox-1_47 and later.

Version 0.02. Tagged as 'Common-0_02'

Detail:
  Currently, there is no way of ascertaining the client handle that used to
    belong to a deleted object.  Thus applications cannot rely on this event
    to close down any associated data structures referenced via the client
    handle.  This event now provides the client handle and the class ID of
    the deleted object (application can check flags bit 0 to determine if
    they are valid).
Admin:
  Required by Toolbox-1_46 and later.

Version 0.01. Tagged as 'Common-0_01'

New SWI symbol added to internal header files for the transient object show private Window SWI.   Needed for Toolbox 1.42/Window 1.51 builds.

In addition to the offset into the gadget structure of the pointer to
the string data, this macro takes the offset of the maximum length field
in the same template and ensures that the buffer length stated is at least
long enough to hold the string being zapped into the buffer.  This

  !MkRam,fd7 added to enable RAM builds of all Toolbox modules
  MakeFile tidied up and support for RAM build added
Module now uses Toolbox memory allocation instead of calling OS_Module.