HELP NEWS.V14_1 John Williams, Jul 1993
For the most recent news, please see HELP * NEWS.
1991
Dec 13 (John Gibson)
--- A new active variable -pop_prolog_size- now enables the size of
the Prolog trail/continuation area to be set explicitly.
See REF *PROLOG. (There is also a corresponding Prolog predicate
-prolog_area_size-.)
Nov 5 (Jon Meyer & John Williams)
The <ENTER> MAN command has been extended so that it is possible
to access manual page files which aren't included in $MANPATH.
See HELP * MAN.
Nov 4 (Adrian Howard)
A non-upward compatible change has been made to shadowclass.
The typespecs created by the shadowclass command were
incorrect. For example, the declaration:
shadowclass foo {a:int, b:int};
would create a typespec "foo" that is the equivalent of
p_typespec foo {a:int, b:int};
This is incorrect since the shadowclass is NOT a "foo"
structure, but a POINTER to a "foo" structure. This meant
that the two declarations
shadowclass foo {a:int, b:int};
shadowclass foo_ptr {a_foo: foo};
Produced identical structures (from the external point of
view) with different access procedures.
To overcome this shadowclass has been changed so that it
does not assign typespecs by default. See the "Examples"
section of REF *SHADOWCLASS for more details.
Oct 25 (Ian Rogers)
--- LIB * NEWFORTRAN_DEC has been deleted. It was deemed too
erroneous to have been used by anybody.
See HELP * EXTERNAL/Fortran for details of the original.
Oct 18 (John Gibson)
--- The efficiency of the procedure -delete- has been considerably
improved, and the result list will now share the largest
possible trailing sublist with the original list (rather than
necessarily being a complete copy). In addition, -delete-,
-ncdelete- and -fast_ncdelete- now all take the same arguments,
i.e. as well as the item to delete and the list they allow
optional arguments to specify (a) the equals-procedure to use
when comparing items, and (b) the number of occurrences of the
item to delete. See REF *LISTS.
--- Fixed a bug which caused floating-point operations done
inside user procedures run after a garbage collection (e.g.
-pop_after_gc- or destroy actions) to corrupt the results of
float operations that were already in progress outside the GC
(that is, where the GC was caused by attempting to construct a
"ddecimal").
Oct 10 (John Williams)
--- The ENTER HELPFOR command now searches the HELP files belonging
to the current subsystem before searching the POP-11 HELP
directory.
Sept 14 (John Gibson)
--- As from Version 14.07, all POPLOG strings are guaranteed to be
null-terminated, i.e. to have a 0 byte following the last byte
of the string. This means that strings can be passed directly
to external C functions without modification.
Sept 9 (Adrian Howard)
--- A recogniser for shadowclass records, -isshadow-, added to LIB
*SHADOWKEY, see REF *SHADOWCLASS.
Sept 9 (Andreas Schoter)
--- The variable -popliblist- has been changed to -popautolist-
Sept 6 (Jonathan Meyer)
--- The DEF macro can now test for sectionised identifiers. eg.
#_IF DEF $-foo$-baz
Sept 5 (Julian Clinton)
--- The 'Poplog User Interface' for X Windows has been installed
in C.all/x/ui. See REF *POP_UI. LIB *POPLOG_UI loads it.
Aug 30 (Adrian Howard)
Added -shadow_=- to LIB *SHADOWKEY (see REF *SHADOWCLASS) to
test for equality between shadowclass records. Made -shadow_=-
the -class_=- procedure of shadowclass records.
Aug 23 (Robert Duncan)
--- A new saved image -- startup.psv -- is now included in the main
saved image directory, $popsavelib.
This "startup" image is loaded automatically by all Poplog
commands, including the base pop11 command. This is contrived by
redefining all the command symbols to include the startup image
in the initial argument list. For example, on Unix a new
environment variable $pop_pop11 is defined, with value
"-$popsavelib/startup.psv"
and on VMS, the pop11 symbol has been changed to have value
$popsys:pop11/popsavelib:startup.psv
The purpose of the startup image is to allow additional features
to be included by default with all Poplog commands. The actual
content of the image will vary from site to site, since it can
be modified whenever a new Poplog system is built with *NEWPOP.
Because the pop11 command now includes the restoration of a
saved image, the Poplog executable binary has been renamed
"basepop11" to avoid confusion, i.e. on Unix, the executable is
now:
$popsys/basepop11
and on VMS:
popsys:basepop11.exe
The symbol table and map files have been renamed accordingly.
You can execute the basepop11 command directly if you wish to
avoid the startup saved image.
Aug 01 (Adrian Howard)
--- The procedures -vednextpara- and -vedprevpara- have been
improved considerably. The associated procedures
-vednextparaend- and -vedprevparaend-, used to find the end of
paragraphs, have also been added. See REF *VEDPROCS for details.
July 31 (Adrian Howard)
--- The procedures -vednextsent- and -vedprevsent- have been
improved considerably. The associated procedures
-vednextsentend- and -vedprevsentend-, used to find the end of
sentences, have also been added. See REF *VEDPROCS for details.
July 26 (Robert Duncan)
--- The default file used for output from LMR (vedlmr_print_in_file)
has been renamed 'output.p' for consistency across all language
subsystems. For details of how to change the output destination
see HELP * LMR.
The 'output.p' file is now also used as the default for
immediate mode compilation in place of 'interact.p'.
July 12 (Aaron Sloman)
--- VED ENTER indexify, and ENTER g extended to allow an argument.
So that different header formats are more easily coped with,
and it is easier to produce an index of procedure definitions.
See HELP * VED_INDEXIFY
July 2 (Ian Rogers)
--- Made significant speed improvements to the compilation of
Flavours code (ie. rationalising the autoloading behaviour).
An upshot of this is that it is no longer possible to to use
macro constructs within either the superclass and metaclass part
of a flavour header or within the ivars, divars and method name
declaration headers.
Although this change is not upwardly compatible, it should
affect only few, if any, programs.
June 30 (Aaron Sloman)
--- Documentation on vedhardtabs in REF * VEDVARS was wrong (behaviour
when true and when false switched). Now fixed
--- Bug in * VEDCUTBLOCK and related procedures described in
HELP * VEDBLOCKS now fixed, by making -vedhardtabs- locally
false.
June 29 (Aaron Sloman)
--- Unix Only: minor bug in LIB VED_NET fixed, and documentation for
Net News reading program improved. See HELP * VED_NET
June 25 (Adrian Howard)
--- LIB *SLOWPROCS has been altered so that non-checkings procedures
are found by looking for "fast_" and "fi_" prefixes. See REF
*FASTPROCS and LIB *SLOWPROCS.
June 24 (Aaron Sloman)
--- New utilities using the sys_timer facility described in
REF * TIMES, as follows:
--- New improved version of LIB * PROFILE, documented in
HELP *PROFILE
--- Two new VED facilities, LIB * VED_CLOCK and LIB * VED_ALARM
described in HELP * VED_CLOCK, * VED_ALARM (UNIX only)
The former shows the time on VED's status line. The latter
allows you to set one or more alarms, e.g. to remind you
to do something.
June 22 (Aaron Sloman)
--- HELP * EFFICIENCY updated with information about compile-time
options provided in LIB * COMPILE_MODE and related files.
--- LIB * VED_FOLLOWUP (Unix only), now fixed not to ignore line
starting "Followup-To:". No longer takes note of "Approved:" lines.
See HELP * VED_POSTNEWS
June 22 (Jonathan Meyer)
--- basic XVed documentation installed. See HELP *XVED
June 20 (Simon Nichols)
--- A new library LIB * DEBUGGER has been added which defines a
source-level debugger for POP-11. The debugger accepts commands in
terms of the source files, line numbers and variable names of your
program. It enables you to:
-- set break points on source line numbers and procedures;
-- single-step execution;
-- examine and update all variables, including lexical ones;
and much else besides. See HELP * DEBUGGER for details.
June 19 (Robert Duncan)
--- A new *SUBSYSTEM procedure -subsystem_searchlist- returns the
documentation or library search-lists appropriate to particular
subsystems. See REF * subsystem_searchlist.
--- The procedure -flatten_searchlist- has been modified just to
ignore procedures in search-lists rather than mishap.
See REF * flatten_searchlist.
June 14 (Aaron Sloman)
LIB * VED_AUTOSAVE provides a mechanism making it possible to
instruct VED to save all changed files every N minutes. For
details see HELP * VED_AUTOSAVE
June 10 (Aaron Sloman)
Minor changes to LIB DIREDPIPEIN, and LIB VEDPIPEIN to reduce
spurious refreshing with ENTER dired -l
See HELP * DIRED
June 7 (Robert Duncan)
--- New library LIB * MKIMAGE added to simplify the making of saved
images. See HELP * MKIMAGE for details. The library largely
supersedes the existing LIB * MKSSIMAGE and LIB * MKVEDIMAGE.
June 5 Version 14.04
June 1 (Aaron Sloman)
--- ENTER ls fixed to deal with the case where the last produced
ls file is the only file left in VED.
--- New VED library command ved_nextsame searches the current and
"other" file for the next line that is the same in both. It is for
use with ved_diff in comparing two files. See HELP * VED_NEXTSAME
--- ved_diff (ENTER diff) has been revised so that when a difference
is found the command 'nextsame' is now set on the status line,
rather than 'nextdiff' See HELP * DIFF
May 31 Version 14.03
May 31 (John Gibson)
--- (VMS Only) There is now a procedure -sys_symbol_value- for
getting or setting DCL symbol values. See REF *sys_symbol_value.
May 30 (Jon Meyer)
--- A "Vanilla" version of the XVed X based multi window Ved
editor has been Installed. It is loaded using LIB *XVED.
May 30 (John Gibson)
--- There is a new mechanism called `runtime actions'. This allows
the execution of certain actions (procedures) to be delayed until
runtime, where `runtime' is indicated by whether or not the POPLOG
image/saved image being run was given the command-line argument
%nort. See the sections `Runtime Actions' and `General System
Startup' in REF *SYSTEM.
--- The "=" form of -exload- now works via runtime actions (the
main reason for which they were introduced). This is dealt with in
detail in REF *EXTERNAL, but in summary the consequences of the
change are
(a) A saved image that uses identifiers initialised with "=" is
only guaranteed to work properly under all circumstances if built in
a system run with %nort;
(b) The identifiers will not be assigned until runtime, and so
their values cannot be accessed at compile-time when building a
saved image in this way.
May 29 (Simon Nichols)
--- You can now exit from any POPLOG language by typing
bye
to the prompt, or in VED, doing
<ENTER> bye
This is since the command "bye" has been added to Prolog and PML.
May 16 (Simon Nichols)
--- Two new PWM libraries (courtesy of Reading University) added.
See LIB * PWM_MAKE_SETITEM and LIB * PWM_MAKE_SLIDERITEM.
May 3 (Aaron Sloman)
--- LIB * WINDOWS modified to use "include sigdefs" so that it is
more portable.
--- The TEACH PROLOG file caused confusion for Unix users by
recommending typing CTRL-Z for end of file. This has been clarified.
May 1 (John Gibson)
--- (VMS Only) The problem of POPLOG saved images not surviving new
releases of VMS (and giving the mishap 'SYSTEM HAS CHANGED IN SIZE'
etc) has now been considerably eased. This problem is due to VMS
shareable images having different sizes in different releases of
VMS, and, while it has not been eliminated altogether, several
important improvements have been made:
First, POPLOG will now only be affected by an EXPANSION in shareable
image size (previously even a contraction could not be coped with).
Second, the system now allows the user to control what percentage of
the space occupied by shareable images should be left free for them
to expand. This is done by giving the logical name
"pop_shrim_margin" an integer percent value (defaulting to 10% if
not set).
In addition, when a saved image does fail to restore because the
expansion margin allowed was insufficient, the system prints a more
helpful mishap message
crsv: CAN\'T RESTORE - VMS SHAREABLE IMAGES HAVE EXPANDED,
NEED TO REBUILD SAVED IMAGE
INVOLVING: 'expansion margin allowed A%, needed N%'
giving the percent A that was allowed when the saved image was
built, and the percent N that was required.
See the section `Note on VMS Saved Images' in REF *SYSTEM.
Apr 18 (Jon Meyer)
--- Moved contents of LIB *SYSDEFS to INCLUDE *SYSDEFS.PH, and
changed LIB *SYSDEFS to do 'loadinclude sysdefs.ph;' This lets
programs do conditional compilation based on system configuration
without having to make so many global constants. Also closer to how
INCLUDE *SIGDEFS is.
Apr 17 (John Gibson)
--- A new active variable -proglist_state- allows the complete state
of -proglist- and all its associated variables to be saved or
localised in a procedure. The procedure -proglist_new_state-
generates a state to assign to -proglist_state-, given an input
source (item list, character repeater or filename, etc) as argument.
The basic motivation for these is that processing a list locally in
-proglist-, e.g.
dlocal proglist = LIST;
is not guaranteed to work in all contexts, because it does not
properly localise (or initialise) the other data associated with
-proglist- (such as the stack of #_INCLUDEs or #_IFs, etc). The
above can now be done correctly with
dlocal proglist_state = proglist_new_state(LIST);
See the section `Proglist State Variables' in REF *PROGLIST.
--- An associated change is that -compile- now uses the above
facilities. This means that in addition to the usual character
repeater/filename values, it now it allows an item list as argument.
As a consequence, the procedure -popval- is redundant.
Apr 5 (Jon Meyer)
--- Made define_inline macros accept 0 arguments, and improved the
way they read declarators. Added references to HELP *INLINE in
REF *SYNTAX/define_inline and HELP *DEFINE_FORM.
Apr 3 (John Gibson)
--- Regrettably, it has been found necessary to introduce the
following (on some systems) non-upward-compatible change to the new
external calling mechanisms introduced in Version 14:
The result type "sfloat" for an external function now means exactly
what it says, i.e. the function returns a single-float datum.
This was not previously the case, because (like a "decimal"
argument to the old -external_apply-), "sfloat" assumed a result as
returned by a "float" function in C (which on some systems, e.g.
Suns, actually returns a double).
The C-style result is now catered for by the new type "float" (which
in all contexts other than a function result is identical to
"sfloat"). Thus to call a C "float" function with -exacc- (or
declare it in -exload- etc), use :float as the result typespec; for
any other language (e.g. a FORTRAN "real*4" function) use :sfloat.
This change does not affect double-float function results; use
:dfloat for these in all cases.
See REF *EXTERNAL, REF *KEYS.
Mar 13 (John Williams)
--- New procedure *vedlinerepeater added. Returns successive lines
from the current VED buffer.
Mar 7 (Roger Evans)
--- Core X toolkit documentation finally installed. See REF *X, REF
*XTOOLKIT, REF *XT_LIBS, REF *XptDescriptor, REF *SHADOWCLASS, among
others.
Mar 4 (Aaron Sloman)
--- Altered vededitor so that on entry it does not try to force
input to a VED window, and on exit it does not force the base window
to open. The former can be achieved by including "ved" in the list
vedusepwmwindows (which unfortunately can cause some odd side
effects), the latter by including "ved_pop".
See REF * VEDUSEPWMWINDOWS
Feb 26 (Aaron Sloman)
--- Revised entry for * issubitem in REF * STRINGS, and entries for
* vedwordright, * vedwordleft, * vedmoveitem, * vedatitemstart,
* vedatitemend, and * vedchartype, in REF * VEDPROCS.
--- REF * VEDPROCS substantially reorganised
Feb 22 (John Williams)
--- <ENTER> HELPFOR now uses the same wild-card syntax as <ENTER> ?.
See HELP * HELPFOR.
Feb 6 (Aaron Sloman)
--- Installed change to pwmtool procedure set_input_source() due to
Anthony Worrall, to stop excessive motion of cursor under PWM.
Jan 14 (John Williams)
--- Version number changed to 14.01
Jan 8 (David Young)
--- Made LIB * SHOWARRAY's use of fast integer procedures more
sensible and fixed a bug caused by the change of field specifiers.
Jan 7 (Aaron Sloman)
--- Not documented for V14 (though in the system)
Two new VED identifiers to facilitate user control, and provide more
EMACS-like options:
vedlastcommand (last procedure run)
veduserdocommand(boolean, proc)
The boolean is true if called from veddocommand, false if
called from Ved_do_char action.
The context in both cases is of the form:
if isprocedure(veduserdocommand) then
veduserdocommand(<boolean>, action)
else
action();
endif;
action -> vedlastcommand;
I.e. if the user defines veduserdocommand then it MUST do the action
if it is to be done. It doesn't return a result saying whether it has
been done or not.
Jan 7 (John Gibson)
--- A new procedure -sys_timer- implements multiple interval timers
(in all systems, Unix and VMS). Timers can run in either real time
or process-virtual time. See REF *sys_timer.
*********** For earlier news please see HELP NEWS.V14 **************
--- C.all/help/news.v14_1
--- Copyright University of Sussex 1993. All rights reserved.