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changes4.3.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/strict.dtd">
<html>
<head>
<title>YAP change log</title>
<link rel=stylesheet href="changes.css" type="text/css">
</head>
<body>
<hr>
<h1>Changes in YAP4.5</h1>
<h2>Yap-4.5.3:</h2>
<li></li>
<ul>
</ul>
<hr>
<h1>Changes in YAP4.3</h1>
<h2>Yap-4.3.23:</h2>
<ul>
<li>UPDATE: new Logtalk version (2.15.2).</li>
<li>NEW: <code>hide_predicate/1</code>. (request from Paulo Moura)</li>
<li>NEW: support condor.</li>
<li>FIXED: bug in waking up attached variables (summer@mail.sc.cninfo.net).</li>
<li>FIXED: extra manual bugs (Maleeha Qazi).</li>
<li>UPDATE: updated <code>configure.in</code> for smooth YAP compilation on MacOS X 10.2.</li>
<li>FIXED: <code>rint</code> is not <code>truncate/1</code> (Paulo Moura).</li>
<li>FIXED: recent change broke debugger help message (Nuno Fonseca).</li>
<li>NEW: <code>call_with_args/n</code> simulates <code>call/n</code>.</li>
<li>FIXED: have different types for <code>Atom</code>, <code>Term</code>, and <code>Functor</code> in <code>c_interface</code>.</li>
<li>FIXED: make <code>call_with_args/*</code> check if first arg is atom.</li>
<li>FIXED: make <code>cd/1</code> complain on bugs.</li>
<li>FIXED: always do something on <code>gmp</code> allocation (request from
Roberto Bagnara).</li>
<li>FIXED: always allow abolish on static predicates.</li>
<li>UPDATE: include new <code>apply_macros</code> code from Erick Alphonse,
and acknowledge J. Schimpf.</li>
<li>FIXED: <code>YapRunGoal</code> (Roberto Bagnara).</li>
<li>NEW: <code>term_position</code> option for <code>read_term</code> (Nicos)</li>
<li>UPDATE: fixed <code>shell/1</code> and <code>shell/2</code> in library(system). (Nicos)</li>
<li>FIXED: <code>\newline</code> in strings (Roberto Bagnara). </li>
<li>FIXED: avoid reincluding of <code>c_interface.h</code> (Roberto
Bagnara). </li>
<li>FIXED: make <code>c_interface.h</code> compilable in C++ (Roberto
Bagnara). </li>
<li>FIXED: garbage collector should recover dynamic clauses
and logical semantics DB. Trust gc to recover active clauses </li>
<li>FIXED: <code>read_vars</code> was called with unbound argument.</li>
<li>FIXED: backtrackable C-predicates (thanks to Christophe
Billard for sending the file).</li>
<li>FIXED: new options for <code>file_property</code> (Nicos).</li>
<li>FIXED: check unification result in <code>file_property</code> (Nicos).</li>
<li>FIXED: <code>yap_flag(fileerrors)</code> (Nicos).</li>
<li>FIXED: clauses with blobs cannot be simply abolished.</li>
<li>FIXED: retract of undefined predicate makes it dynamic.</li>
</ul>
<h2>Yap-4.3.22:</h2>
<ul>
<li>FIXED: default syntax error mode should be error.</li>
<li>NEW: atom garbage collector.</li>
<li>FIXED: recover space for logical update semantics.</li>
<li>FIXED: smash references to deleted entries with logical
update semantics.</li>
<li>FIXED: make instance of deleted fail for logical
update semantics.</li>
<li>FIXED: <code>garbage_collect</code> should call <code>do_gc</code> with <code>P</code>, not <code>CP</code>.</li>
<li>FIXED: use <code>YAPSHAREDIR</code> as in manual (Ashwin Srinivasan).</li>
<li>FIXED: warning message about <code>unify_extension</code>.</li>
</ul>
<h2>Yap-4.3.21:</h2>
<ul>
<li>FIXED: syntax errors dumped all numbers as if small integers.</li>
<li>UPDATE: new Logtalk version (2.10.0).</li>
<li>FIXED: debugger could enter infinite loop if spying
<code>portray</code> (Steve Moyle).</li>
<li>FIXED: <code>predicate_property(P,source)</code> (Ines Dutra).</li>
<li>NEW: use system regex routines if available.</li>
<li>FIXED: profiling.</li>
<li>FIXED: Yap in CYGWIN, including DLLs.</li>
<li>NEW: <code>variable_in_term/2</code> at <code>library(terms)</code>.</li>
<li>FIXED: debugger would not step through <code>[-F]</code>.</li>
<li>FIXED: <code>unix(argv(L))</code> was doing bad type checking.</li>
<li>FIXED: <code>assert((a:- m:[f]))</code> would core dump.</li>
<li>FIXED: gc in <code>dexecute</code> should not use current <code>Y</code>, instead if
should look at parent's <code>Y</code> (Ines Dutra).</li>
<li>FIXED: do not loop on unbound metacalls.</li>
<li>FIXED: do not assert clauses if the predicate is active
and you had to abolish first.</li>
<li>FIXED: always allow asserting over static predicates.</li>
<li>FIXED: disable cache when checking whether static was
in use.</li>
<li>FIXED: heap overflow while storing <code>db</code> term.</li>
<li>FIXED: <code>trust_fail</code> should be preceeded by an <code>sla</code>.</li>
<li>FIXED: make <code>sla</code> point to current pred, get rid of current
pred in bitmap.</li>
<li>FIXED: <code>MkVarTerm</code> in <code>c_interface.h</code> (Christophe Billard)</li>
<li>FIXED: get rid of unnecessary <code>USE_OFFSETS</code></li>
<li>FIXED: stupid limit on Heap Size with <code>LowTags</code>. (David Page)</li>
<li>FIXED: make <code>fileerrors</code> default for SICStus. (Nicos Angelopoulos)</li>
<li>FIXED: <code>g(X) :- (Z is 2*X; a(Z))</code>: <code>Z</code> cannot be seen as a free
var. (Nicos Angelopoulos).</li>
<li>FIXED: <code>atom_concat</code> was not allocating heap correctly (Nicos Angelopoulos).</li>
<li>NEW: <code>ord_intersection/4</code> (Nicos Angelopoulos).</li>
<li>NEW: <code>file_search_path/2</code> (Nicos Angelopoulos).</li>
<li>FIXED: fix <code>yap_flag(host_type)</code>.</li>
<li>FIXED: make Yap compile under VC++ again.</li>
<li>FIXED: don't try to handle <code>X/0</code> the ISO way.</li>
<li>FIXED: make Yap runnable in WIN98.</li>
<li>FIXED: access to non-existing dynamic array should not core-dump.</li>
<li>FIXED: <code>abolish(_)</code> should give error in ISO mode.</li>
<li>NEW: <code>yap_flag(argv,L)</code> (Nicos Angelopoulos).</li>
<li>FIXED: make <code>user</code> the name of the first three streams.</li>
<li>NEW: <code>reachable/3</code> in ugraphs (Nicos Angelopoulos).</li>
<li>NEW: <code>-f</code> flag in boot (Nicos Angelopoulos).</li>
<li>FIXED: manual html warnings (Nicos Angelopoulos).</li>
<li>NEW: <code>yap_flag(informational_messages)</code> allows disabling
informational messages (Nicos Angelopoulos).</li>
<li>FIXED: <code>lcc</code> would choke when compiling Yap.</li>
<li>FIXED: <code>simplesim</code> miscompilations.</li>
<li>FIXED: more SICStus like top-level messaging (Nicos Angelopoulos).</li>
<li>FIXED: missing WIN32 interface declaration (Christophe Billard).</li>
<li>FIXED: <code>alarm</code> was not working in WIN32 (Tolga Konick).</li>
<li>FIXED: <code>get0/2</code> and <code>get/2</code> should call <code>$get</code> directly.</li>
<li>CHANGE: make full leash default.</li>
<li>NEW: continue creeping after a goal. (Ines Dutra)</li>
<li>FIXED: <code>creep</code> should not creep the whole debugger.</li>
<li>FIXED: <code>break</code> should not start the whole system.</li>
<li>FIXED: <code>abolish</code> could backtrack and give weird error (Nicos
Angelopoulos).</li>
<li>FIXED: make <code>consult</code>, <code>use_module</code>, and friends meta-predicates
(Nicos Angelopoulos).</li>
<li>FIXED: make <code>use_module</code> a directive.</li>
<li>FIXED: <code>predicate_property/2</code> to handle modules correctly
(Nicos Angelopoulos).</li>
<li>FIXED: stack expansion in meta-execution.</li>
<li>FIXED: <code>depth_limit</code> was not handled correct in
meta-execution of conjunctions (Rui Camacho).</li>
<li>NEW: new option for error handling in the debugger.</li>
<li>UPDATE: new version of Logtalk.</li>
<li>FIXED: heap library.</li>
<li>NEW: <code>empty_heap/3</code>.</li>
<li>FIXED: some system predicates are exported outside the
prolog module.</li>
<li>FIXED: calls to <code>open/3</code>, <code>current_stream/3</code>, <code>tab/{1,2}</code>, and <code>format/3</code>
might interfere with trace.</li>
<li>NEW: new <code>catch/3</code> and <code>throw/1</code> mechanism.</li>
<li>FIXED: <code>p_socket</code> would crash if no streams were
available (Ines Dutra).</li>
<li>FIXED: CLPQR complaints on importing private predicates.</li>
</ul>
<h2>Yap-4.3.20:</h2>
<ul>
<li>FIXED: <code>'aaaa''xaaa'</code> was inserting <code>x</code> instead of <code>'</code> (Miguel Filgueiras).</li>
<li>FIXED: fix CHR using merge from prolog instead of ordsets.</li>
<li>FIXED: store infinite terms in DB properly (at last).</li>
<li>FIXED: <code>execute_7</code> (Paulo Moura).</li>
<li>FIXED: expand meta-call arguments even if they are
built-ins (otherwise breaks <code>bb_*</code>).</li>
<li>FIXED: always generate <code>FATAL_ERROR</code> on <code>SIGSEGV</code>.</li>
<li>FIXED: another GC bug.</li>
<li>FIXED: <code>phrase/2</code> and <code>phrase/3</code> are meta-predicates.</li>
<li>FIXED: use <code>TR</code> instead of <code>H</code> for system.</li>
<li>FIXED: <code>absolute_file_name/2</code> should be SICStus compatible (Nicos Angelopoulos).</li>
<li>FIXED: put < debugger back to work (Ines Dutra).</li>
<li>FIXED: make <code>rem</code> and <code>mod</code> ISO-compatible operators (Paulo Moura).</li>
<li>FIXED: expand consult stack when there are too many
predicates (David Page).</li>
<li>FIXED: create DLs even when you don't need .so.</li>
<li>FIXED: <code>abolish/1</code>.</li>
<li>NEW: try to make module system really compatible.</li>
<li>CLEANUP: don't use state of Pred.</li>
<li>SPEEDUP: improve predicate access by linking predicates to
functors.</li>
<li>FIXED: <code>listing</code> broke when <code>current_predicate</code> became meta.</li>
<li>FIXED: <code>consult</code> should not erase dynamic clauses (report
from James Cussens).</li>
<li>FIXED: check if we still can do garbage collection (<code>MBIT</code>
and <code>RBIT</code> ok) (report from James Cussens).</li>
<li>FIXED: always release stack after <code>InitBigNum</code> (report from
Nicos Angelopoulos).</li>
<li>FIXED: <code>random</code> would not load in windows (report from
Henrik Boström).</li>
<li>FIXED: don't send warnings about repeated predicates from
different modules (report from Henrik Boström).</li>
<li>NEW: <code>socket_buffering/4</code> (report from Henrik Boström).</li>
<li>FIXED: <code>current_hostname/1</code> to <code>current_host/1</code> (report from
Henrik Boström).</li>
<li>FIXED: <code>socket_select/5</code> was completely broken (report from
Henrik Boström).</li>
<li>FIXED: avoid unnecessary choice-point in
<code>yap_flag(user_*,Who)</code> (report from Nicos Angelopoulos).</li>
<li>FIXED: <code>flush</code> should work with readline.</li>
<li>FIXED: reset alarm at top-level.</li>
<li>FIXED: do <code>signal(ALARM)</code> immediately.</li>
<li>FIXED: don't use full optimization for <code>parser.c</code> in cygwin
(report from Steve Moyle).</li>
<li>NEW: Erik Alphonse's apply_macros library.</li>
<li>FIXED: <code>ord_del_element/3</code> (Nicos Angelopoulos).</li>
<li>FIXED: texinfo warnings (Stasinos).</li>
<li>FIXED: under emacs/win32: prompt if $EMACS=t and buf NULL.</li>
<li>FIXED: <code>^C</code> and <code>readline</code> (I hope).</li>
<li>NEW: <code>trace</code> and <code>notrace</code>.</li>
<li>FIXED: make <code>C-c t</code> actually trace.</li>
<li>FIXED: put <code>[debug]</code> when in debug mode.</li>
<li>FIXED: <code>make install_info</code> (actual fix is in Yap-4.3.19).</li>
</ul>
<h2>Yap-4.3.19:</h2>
<ul>
<li>FIXED: <code>fflush(NULL)</code> broken in some machines (Stasinos).</li>
<li>FIXED: don't flush input streams (Stasinos).</li>
<li>FIXED: new <code>statistics/0</code>.</li>
<li>FIXED: use 15 bits of precision for floats, instead of the
default 6..</li>
<li>FIXED: check for last file modification in <code>use_module</code>.</li>
<li>FIXED: <code>get_list</code> + <code>unify_local</code> was being compiled into
<code>glval</code>, breaking <code>ENV</code> vars </li>
<li>FIXED: <code>abort</code> was crashing in Alpha machines.</li>
<li>FIXED: make <code>^c-a</code> work within gc.</li>
<li>FIXED: handle correctly very deep nested terms while gc
marking.</li>
<li>FIXED: <code>ArityOfFunctor</code> was giving trouble with HP-UX cc
(Stasinos Konstantinos).</li>
<li>FIXED: <code>^c</code> works with Yap/MINGW32 (not in cygwin).</li>
<li>FIXED: <code>^c</code> a should never core dump.</li>
<li>FIXED: comparison of variables in sub-terms.</li>
<li>FIXED: parse +inf, -inf, +nan, -nan as floats and write
them accordingly.</li>
<li>FIXED: comparison was breaking ISO.</li>
<li>FIXED: use <code>$(CC)</code> never <code>gcc</code> directly.</li>
<li>FIXED: support newer versions of readline by moving text
to prompt.</li>
<li>FIXED: upgrade to autoconf 2.5.</li>
<li>FIXED: <code>catch</code> and <code>throw</code> should not leave unnecessary
choice-points behind.</li>
<li>FIXED: make catch cleanup queue of findall entries.</li>
<li>FIXED: change <code>catch/3</code> and <code>throw/1</code> to use arrays.</li>
<li>CLEANUP: split <code>TRAIL_REF</code>.</li>
<li>FIXED: give correct type to <code>FreeBlocks</code>.</li>
<li>FIXED: give correct type to alias list.</li>
<li>FIXED: format <code>~NN</code> wasn't implemented (report from Markus Walther).</li>
<li>DELETED: <code>shell/1</code> is now available through system library.</li>
<li>FIXED: <code>!/0</code> in meta-call wasn't cutting.</li>
<li>FIXED: <code>MkLongIntTerm</code> (from Stasinos Konstantinos).</li>
<li>NEW: Logtalk OO library (from Paulo Moura).</li>
<li>FIXED: CHR instalation.</li>
<li>SPEEDUP: avoid unnecessary choice-points with CLPQR.</li>
<li>NEW: inline <code>$mod_switch</code>, <code>$mod_switch</code> now uses
backtrackable updates to modules.</li>
<li>NEW: new method for marking timestamps that simplifies gc</li>
<li>FIXED: bug while collecting multi-assignment variables</li>
<li>FIXED: make yap modules more compatible with SICStus Prolog</li>
<li>NEW: <code>portray_clause/2</code> (request from Nicos Angelopoulos)</li>
<li>FIXED: document <code>absolute_file_name/2</code></li>
<li>FIXED: <code>absolute_file_name/2</code> should return absolute path, never user name! (bug report from Nicos Angelopoulos)</li>
<li>FIXED: in <code>a:-b:call(X)</code> <code>X</code> belongs to the module <code>b</code> (bug report from Nicos Angelopoulos)</li>
<li>FIXED: make <code>consult/1</code> and friends meta-predicates (bug report from Nicos Angelopoulos)</li>
<li>FIXED: allow <code>[M:F]</code> and friends (bug report from Nicos Angelopoulos)</li>
<li>FIXED: <code>ensure_loaded/1</code> can be used as a goal (bug report from Nicos Angelopoulos)</li>
<li>FIXED: <code>abolish(VAR)</code> should abolish all predicates in current module (bug report from Nicos Angelopoulos).</li>
<li>NEW: <code>library(system)</code>, only for Unix system right now.</li>
<li>FIXED: allow <code>current_stream/3</code> to work with third argument known.</li>
<li>FIXED: always leave enough space so that the hybrid garbage collection may work.</li>
<li>FIXED: <code>add_to_path</code> should not leave choice-points.</li>
<li>FIXED: don't initialise first occurrences in branches for func outputs.</li>
<li>FIXED: handle void variables in body.</li>
<li>NEW: externd C-interface with <code>StreamToFileNo</code>, <code>BufferToString</code>, and <code>BufferToAtomList</code>.</li>
<li>NEW: support pipes with <code>open_pipe_stream/2</code>.</li>
<li>FIXED: <code>functor/3</code> was generating too many deallocates at the end of a clause.</li>
<li>FIXED: <code>call_residue/2</code> should not allow constraints to escape (use <code>copy_term_no_variables/2</code> to avoid this).</li>
<li>SPEEDUP: optimise away <code>true/0</code> at the end of a clause.</li>
<li>FIXED: do not short circuit trail entries.</li>
<li>FIXED: Patches for memory allocation in Apple's OS/X.</li>
<li>FIXED: checked whether <code>mmap</code> work right in <code>alloc.c</code>.</li>
<li>FIXED: <code>ASP</code> from <code>Y</code> should have space for <code>env</code> size.</li>
<li>NEW: new garbage collection algorithm.</li>
<li>FIXED: don't allow importing from the module itself.</li>
<li>FIXED: force line buffering for text stream.</li>
<li>FIXED: force no buffering for <code>user_error</code>.</li>
<li>FIXED: flush all streams before writing answer.</li>
<li>FIXED: <code>YP_std*</code> are now streams, so that <code>yap_flag(user_*)</code> will change them too.</li>
<li>FIXED: <code>nth/3</code> and <code>nth0/3</code> would leave one extra choice-point.</li>
<li>FIXED: use <code>Contents</code> instead of <code>Uses</code> to determine live variables.</li>
<li>FIXED: <code>cputime</code> was actually <code>walltime</code> in WIN32, ugh (report from Steve Moyle).</li>
<li>FIXED: regexp library would not compile on recent versions of cygwin.</li>
<li>FIXED: change first two arguments of <code>add_vertices/3</code> for SICStus compatibility (report from Nicos Angelopoulos).</li>
<li>NEW: <code>sum_list/2</code> (request from Nicos Angelopoulos).</li>
<li>FIXED: <code>ord_union/2</code> should not use use <code>merge/3</code> but instead <code>ord_union/3</code> (report from Nicos Angelopoulos).</li>
<li>FIXED: <code>statistics/0</code> should report to <code>user_error</code> (report from Nicos Angelopoulos).</li>
<li>FIXED: database could copy compiled floats, longs, and bigs to <code>Heap</code>, later crashing the garbage collector (report from Nicos Angelopoulos).</li>
<li>NEW: <code>if/3</code> (request from Nicos Angelopoulos).</li>
<li>SPEEDUP: inline <code>functor(S) -> Na,Ar</code>.</li>
<li>SPEEDUP: inline <code>functor(Na,Ar) -> S</code>.</li>
<li>FIXED: pillow installation path.</li>
<li>FIXED: allow <code>yap_flag(user_{},V)</code>.</li>
<li>FIXED: allow second argument unbound to <code>stream_property/2</code>.</li>
<li>FIXED: alias change had broke <code>stream_property/2</code>.</li>
<li>FIXED: alias change had broke <code>tell(user)</code> and <code>see(user)</code>.</li>
<li>SPEEDUP: inline <code>arg/3</code>.</li>
<li>FIXED: extra clause for <code>module/1</code>.</li>
<li>NEW: <code>module/3</code>: SICStus options plus ciao options.</li>
<li>FIXED: mode/1 should not be defined if we do not know what to do about it.</li>
<li>NEW: <code>prolog_flag(version,X)</code>.</li>
<li>FIXED: understand <code>0'\</code> escape sequences.</li>
<li>NEW: <code>atom_concat/2</code> (idea from ciao).</li>
<li>NEW: <code>list_concat/2</code> in <code>library(lists)</code> (idea from ciao).</li>
<li>NEW: allow profile early reset in garbage collector.</li>
<li>FIXED: <code>call_residue</code> should *unify* back constraints *after* restoring original suspension lists.</li>
<li>FIXED: include Mandrake's <code>$(DESTDIR)</code> patches in Makefiles (by Lenny Cartier).</li>
<li>FIXED: <code>close(user_error)</code> now closes stream currently associated with <code>user_error</code>.</li>
<li>FIXED: <code>open(user_*,X,Y)</code> is not special any longer (SICStus compatibility).</li>
<li>FIXED: <code>prolog_flag({max,min}_integer,X)</code> with GMP.</li>
<li>FIXED: <code>prolog_flag(bounded,false)</code> with GMP.</li>
<li>NEW: <code>prolog_flag(user_{input,output,error},X)</code> (request from Nicos Angelopoulos).</li>
<li>FIXED: allow <code>close(file_alias)</code>.</li>
<li>FIXED: <code>user_input</code>, <code>user_output</code>, and <code>user_error</code> are now aliases, like all the others.</li>
<li>FIXED: restore <code>YapLibDir</code>.</li>
</ul>
<h2>Yap-4.3.18:</h2>
<ul>
<li>FIXED: alignment bug with <code>walltime</code> in sparc/solaris.</li>
<li>FIXED: shunting in garbage collector.</li>
<li>FIXED: restore arithmetic operators was broken.</li>
<li>FIXED: restore arrays had never been implemented.</li>
</ul>
<h2>Yap-4.3.17:</h2>
<ul>
<li>FIXED: recording floating point numbers was broken (report from Ashwin Srinivasan).</li>
<li>FIXED: restore bitmap <code>Pred</code> pointers from calls.</li>
<li>FIXED: restore masks when adjusting the data base.</li>
<li>FIXED: handle pointers to <code>Heap</code> and <code>Appls</code> to <code>Trail</code> correctly in <code>grow()</code>.</li>
<li>FIXED: db terms with variables must be adjusted from correct offset (restore db).</li>
<li>FIXED: atomic terms do not need masks (restore db).</li>
<li>FIXED: complex terms in db may also have variables (restore db).</li>
<li>FIXED: functors are never offsets (<code>sshift</code>).</li>
<li>FIXED: check for <code>NULL</code> pointers when restoring FreeSpace mm.</li>
<li>FIXED: make <code>gcc -mno-cygwin</code> default in <code>cygwin</code> environment.</li>
<li>FIXED: kill <code>COMPRESS_DB_TERM</code> and use new rational tree scheme for DB instead.</li>
<li>FIXED: use new <code>rational_tree</code> scheme in <code>arrays.c</code>, <code>cmmpreds.c</code>, and <code>corout.c</code>.</li>
<li>FIXED: make <code>variant/2</code>, <code>term_variables/2</code>, and friends use new <code>rational_tree</code> scheme.</li>
<li>FIXED: make <code>copy_term/2</code> use new <code>rational_tree</code> scheme.</li>
<li>FIXED: don't test for age in <code>unify.c</code>.</li>
<li>NEW: <code>cyclic_term/1</code> and <code>acyclic_term/1</code> in <code>terms</code> library.</li>
<li>FIXED: use <code>RATIONAL_TREES</code> scheme to in <code>unify_with_occurs_check/2</code>.</li>
<li>FIXED: <code>unify_with_occurs_check/2</code>.</li>
<li>FIXED: make Yap run under SGI's <code>gcc -mabi=64</code> (gcc buggy? Needs testing).</li>
<li>FIXED: make Yap run under SGI's <code>cc -64</code>.</li>
<li>FIXED: fix alignment bug for 64bits in <code>AllocCMem</code>.</li>
<li>FIXED: make Yap run under HP-UX's cc.</li>
<li>FIXED: avoid labels before brackets with HP-UX cc.</li>
<li>FIXED: get rid of huge masks in <code>dbase.c</code>.</li>
<li>FIXED: make Yap run under SGI's cc.</li>
<li>FIXED: avoid smart comparison in non-GNUCC compilers.</li>
<li>FIXED: get rid of unused variables.</li>
<li>FIXED: get rid of warnings with <code>enum</code> types.</li>
<li>NEW: <code>number_atom/2</code>.</li>
<li>FIXED: purge unnecessary <code>unify_lvar X0</code> with in <code>unify_n_voids_last</code>.</li>
<li>FIXED: make it compile again under cygwin pure.</li>
<li>FIXED: documentation for pillow.</li>
<li>FIXED: use <code>Yap.spec</code> and <code>/usr/share/info</code> for recent rpms.</li>
<li>FIXED: <code>configure</code> would check for <code>limits.h</code> twice.</li>
</ul>
<h2>Yap-4.3.16:</h2>
<ul>
<li>FIXED: handle trail segments when growing heap or local (tabulation).</li>
<li>FIXED: fix backtracking with multi-assignment variables (bug report from Bart Demoen).</li>
<li>FIXED: only insert into relocation chain if heap pointer.</li>
<li>FIXED: handle overflows in substitution stack for tabulation.</li>
<li>FIXED: documentation bug in CHR.</li>
<li>FIXED: how to include <code>opt.mavar.h</code> (bug report from Luis Fernando).</li>
<li>FIXED: trail overflow while doing gc (bug report from GJVanNoord).</li>
<li>FIXED: System would lose <code>[]</code> because the atom looked like <code>NULL</code> (bug report from Rui Camacho).</li>
</ul>
<h2>Yap-4.3.15:</h2>
<ul>
<li>FIXED: garbage collector now marks all local variables so that we can do early reset on local variables.</li>
<li>FIXED: support second quadrant machines in new scheme for large numbers.</li>
<li>NEW: <code>ord_setproduct/3</code> in <code>library(ordsets)</code>.</li>
<li>NEW: garbage collection for tabled computations.</li>
<li>FIXED: <code>garbage_collect/0</code> shouldn't affect gc heuristics.</li>
<li>NEW: OPTYap's latest tabulation code.</li>
<li>FIXED: respect debugger printining options.</li>
<li>FIXED: make sure variables are globalised before spying.</li>
<li>FIXED: tabling in <code>autoconf</code>.</li>
<li>SPEEDUP: improve variable unification where we know one of the variables is in the heap.</li>
<li>FIXED: when sweeping garbage collector should check for variables posing as blobs (<code>USE_OFFSETS</code>).</li>
<li>FIXED: reduce overheads in <code>functor/3</code>.</li>
<li>FIXED: <code>variant</code> and <code>subsumes</code> must check functor and must check for extensions.</li>
<li>FIXED: activate dorming optimised instructions and fix <code>glist_void_var</code>.</li>
<li>FIXED: performance bug in new multiplication code (only for i386).</li>
<li>FIXED: exit at <code>Error()</code> in <code>Error()</code>.</li>
<li>FIXED: <code>grow()</code> had trouble with array ptrs in Trail.</li>
<li>FIXED: include Stasinos patches for gmp, HP-UX and on documentation.</li>
<li>FIXED: <code>recorda_stat_source</code> was passing 0 instead of tagged 0, also always <code>initialise ->code</code>!</li>
<li>FIXED: accept multiple block declarations and process them as a conjunction.</li>
<li>FIXED: <code>call_residue/2</code>.</li>
<li>FIXED: block even when you have no - modes.</li>
<li>FIXED: use <code>mkstemp()</code> instead of <code>tmpnam()</code> in <code>alloc.c</code>.</li>
<li>FIXED: now I can wake up goals at disjunction, see <code>merge(A,[2],C), A = [1|B], (B = [2]; B = [3])</code>. I had to save temporary registers in a term. Check <code>push_live_regs</code> and <code>restore_regs()</code> for details.</li>
<li>FIXED: <code>->p</code> field of either now points to true.</li>
<li>FIXED: we must execute woken up goals before <code>;/2</code>: force stack checking at either.</li>
<li>FIXED: present a single delayed goal per variable Done.</li>
<li>FIXED: make <code>block/1</code> and <code>wait/1</code> directives.</li>
<li>FIXED: make <code>block/1</code> use <code>when/2</code>.</li>
<li>FIXED: compiling with glibc2.2, gcc-2.96 had small complaints.</li>
<li>FIXED: <code>configure</code> should now work with gmp3.</li>
<li>FIXED: overflow with extremely large terms in <code>copy_term</code>.</li>
<li>FIXED: unification between <code>bignums</code> could fail.</li>
<li>FIXED: improve <code>print_message/2</code>.</li>
<li>FIXED: make <code>number_codes</code> understand <code>inf</code> and <code>nan</code>.</li>
<li>FIXED: parse bigints in files.</li>
<li>FIXED: one should set creep flags whenever adding goals.</li>
<li>FIXED: debugging messages to <code>stderr</code>.</li>
<li>NEW: simpler scheme for delays.</li>
<li>FIXED: (<code>mark_trail</code>) do not mark second assignment to <code>mavar</code> in same choicepoint, helps 5% in mip, zilch in rkf.</li>
<li>FIXED: make <code>goal_expansion</code> and <code>clause_expansion</code> logical and multifile.</li>
<li>FIXED: <code>stackgrow()</code> with <code>biginits</code>.</li>
<li>FIXED: compile bigints properly.</li>
<li>FIXED: <code>ShowCode</code> should know about bigint instructions.</li>
<li>FIXED: <code>arith.yap</code> should understand int != bigint.</li>
<li>FIXED: <code>==/2</code> had bugs with attributed variables.</li>
<li>FIXED: make debugger aware of woken goals.</li>
<li>FIXED: bug in debugger with single update semantics dynamic clause.</li>
<li>FIXED: definition of <code>MAX_WORKSPACE</code> had been deleted from <code>alloc.c</code>??</li>
<li>FIXED: <code>frozen/2</code> and outputting suspended goals.</li>
<li>FIXED: <code>BlobTermAdjust</code> was not always defined.</li>
<li>FIXED: bad memory allocation in <code>parser.c</code> for _ resulted in cryptic error messages.</li>
<li>FIXED: <code>//</code> error in CHR.</li>
<li>FIXED: syntax error in initialization.</li>
<li>FIXED: syntax error messages again point to the error.</li>
<li>FIXED: add extra copyright info about LUM in manual.</li>
</ul>
<h2>Yap-4.3.14:</h2>
<ul>
<li>FIXED: gcc/solaris would not compile.</li>
<li>FIXED: gc instrumentation was still giving noise.</li>
<li>FIXED: bug without GMP.</li>
<li>NEW: CHR manual.</li>
</ul>
<h2>Yap-4.3.13:</h2>
<ul>
<li>FIXED: <code>call_residue/2</code>.</li>
<li>FIXED: <code>==</code> in <code>configure.in</code>.</li>
<li>NEW: document attributed variables and CLP(Q,R).</li>
<li>NEW: initial support for Apple OS/X, thanks to Paulo Moura for the patch.</li>
<li>FIXED: hash trouble in IDB (thanks to Stasinos Konstantinos for the report)).</li>
<li>SPEEDUP: <code>meta_predicate</code> database is now in dynamic procedures with logical updates.</li>
<li>FIXED: module 0 should always be found in DB.</li>
<li>FIXED: alloc space for <code>get_num</code> from trail.</li>
<li>NEW: <code>discontiguous</code> is a valid operator.</li>
<li>FIXED: <code>gcd/2</code> operator would break on negative numbers.</li>
<li>NEW: support for GMP gnu library and longints.</li>
<li>NEW: back to blobs in global.</li>
<li>NEW: new implementation of arithmetic with a function per operator and no switches.</li>
<li>FIXED: <code>##</code> breakage in OS/X cpp (<code>c_interface.h</code>. thks Paulo Moura).</li>
<li>NEW: new arithmetic code.</li>
<li>NEW: <code>CHR</code> (Thanks to Thom Fruewirth).</li>
<li>NEW: itemization bugs in the manual (Stasinos Konstatinos).</li>
<li>NEW: add <code>sequential/0</code> and <code>parallel/0</code> directives.</li>
<li>FIXED: move <code>Codes</code> and <code>Lists</code> to <code>heap_regs</code> as these variables are in fact supposed to be shared between processes.</li>
<li>FIXED: <code>SBA</code> should be able to store bindings in cell.</li>
<li>FIXED: <code>PutAtt</code> and <code>GetAtt</code> might return <code>NULL</code> in <code>SBA</code>.</li>
<li>FIXED: <code>unify</code> and friends would use uninstantiated variables.</li>
<li>FIXED: only install <code>INTERFACE_HEADERS</code>.</li>
<li>FIXED: <code>DO_MATRAIL</code> had reverse order under <code>SBA</code>.</li>
<li>NEW: <code>prolog_load_context/2</code>.</li>
<li>FIXED: allow reutilising aliases to files.</li>
<li>FIXED: replace <code>term_variables</code> by <code>variables_in_term</code> in <code>pl/*.yap</code>.</li>
<li>NEW: dynamic loading support for HP-UX (Stasinos Konstantinos).</li>
<li>FIXED: help info in <code>configure.in</code> and forgotten <code>$</code> (Stasinos Konstantinos).</li>
</ul>
<h2>Yap-4.3.12:</h2>
<ul>
<li>NEW: configure compilation process from <code>configure</code>.</li>
<li>FIXED: save/restore should set <code>CurrentModule</code>.</li>
<li>FIXED: <code>InitYaamRegs</code> should not set <code>CurrentModule</code>.</li>
<li>FIXED: load_dld would crash on NULL argv[0].</li>
<li>FIXED: get rid of <code>install_library</code> and build <code>libYap.a</code> by default. Fix minor bugs in <code>yaplib</code>.</li>
<li>FIXED: used <code>TRAIL</code> to remember structure-to-structure bindings in utilpreds.c and cmppreds.c (this avoids overflow noticed by GJVNoord).</li>
<li>FIXED: split yapor_on so that ! is after <code>yapor_on</code>. This should prevent cutting to before the root of the tree.</li>
<li>FIXED: bad handling of <code>libs</code> in <code>load_dl.c</code> (fix from Stasinos Konstantopoulos).</li>
<li>FIXED: <code>free_answer_hash_chain</code> should untag parent pointer (Ricardo Rocha).</li>
<li>FIXED: walltime would compile with cygwin (patch from gzk02612@nifty.com).</li>
<li>FIXED: <code>try_logical_pred</code> was doing nasty things to choice-points in parallel mode.</li>
</ul>
<h2>Yap-4.3.11:</h2>
<ul>
<li>FIXED: read could fail and not restore the original input stream (noticed by GJ VanNoord).</li>
<li>FIXED: crappy handling of multi-assignment variables while growing stacks (noticed by GJ VanNoord).</li>
<li>FIXED: Bad save/restore machine registers in hppa.</li>
<li>FIXED: Bad initialisation for '<code>_</code>' variables.</li>
<li>FIXED: check null <code>ENV</code> in <code>do_toggle_static_predicates_in_use</code>, this seems to break HP-UX machines.</li>
<li>FIXED: Bad default address on SGI machines.</li>
<li>FIXED: Atom operations were being included too soon.</li>
<li>FIXED: alignment issue in <code>LastWTimePtr</code> with SPARC.</li>
<li>FIXED: Bind needs <code>HBREG</code> in <code>p_save_cp/exec.c</code>.</li>
<li>FIXED: small ints in <code>term_hash</code>.</li>
<li>FIXED: bug in installing CLPQR in <code>Makefile.in</code> (noticed by Luis Castro and GJ VanNoord).</li>
</ul>
<h2>Yap-4.3.10:</h2>
<ul>
<li>FIXED: install info by default in <code>/usr/share/info</code>.</li>
<li>NEW: <code>MULTI_ASSIGNMENT_VARIABLES</code> should work with tabling and or-parallel execution.</li>
<li>FIXED: small glitches with lcc.</li>
<li>FIXED: <code>walltime</code> in parallel system.</li>
<li>FIXED: zombies in ACOW.</li>
<li>NEW: CLPR is now in the YAP distribution.</li>
<li>NEW: sequential tabling can do stack shifting.</li>
<li>NEW: sequential tabling uses standard memory management system.</li>
<li>FIXED: make tracer work with tabling.</li>
<li>FIXED: make <code>exec_goal</code> work with tabling.</li>
<li>NEW: integrated latest OPTYap.</li>
<li>NEW: CIAO's pillow library.</li>
<li>FIXED: <code>verify_attributes</code> should follow SICStus order, or else CLPR will break in <code>critical,go2</code> :-(.</li>
<li>FIXED: debugger was getting confused by modules that import predicates that are also defined in the module.</li>
<li>FIXED: <code>=..</code> was messing with constraints, make it <code>SDerefHead</code>.</li>
<li>NEW: print <code>$VAR("string")</code> as string.</li>
<li>NEW: <code>write_term(X,[write_depth(X)])</code> is a legal option in SICStus.</li>
<li>NEW: <code>write_term(X,[portrayed(X)])</code> is a legal option in SICStus.</li>
<li>FIXED: debugger would get confused with undefined procedures.</li>
<li>FIXED: DB compression bug for lists with rational trees on.</li>
<li>FIXED: the blackboard routines are meta-predicates!</li>
<li>FIXED: initialization should be performed on correct module.</li>
<li>FIXED: make <code>initialization/1</code> an operator.</li>
<li>NEW: <code>print_message</code> and <code>portray_message</code>.</li>
<li>FIXED: do proper meta-predicate processing for <code>user:a :- meta(...)</code>.</li>
<li>FIXED: do term expansion from top level and for <code>end_of_file</code> in consult.</li>
<li>FIXED: don't do grammar expansion if term expansion succeeds.</li>
<li>NEW: <code>yap_flag(toplevel_hook,_)</code>: this is a goal to be executed before prompting at the top-level.</li>
<li>NEW: <code>variant/2</code>.</li>
<li>FIXED: <code>term_hash</code> was not documented and in the wrong modules.</li>
<li>NEW: first try at ugraphs module.</li>
<li>NEW: SICStus compatible <code>module/1</code> and <code>yap_flag(typein_module,_)</code>.</li>
<li>NEW: SICStus compatible <code>prolog_flag/2</code> and <code>prolog_flag/3</code>.</li>
<li>FIXED: for SICStus compatibility primitives module is now prolog module.</li>
<li>FIXED: corrent consulted file could get confused.</li>
<li>FIXED: more fixes to top-level and call-residue with attributed variables.</li>
<li>FIXED: call to <code>compare_terms</code> in <code>optimise_ce</code> relied on correct <code>H</code>. Could corrupt the compiler.</li>
<li>FIXED: fix a few bugs on presenting floundered goals.</li>
<li>FIXED: procedures imported into user should be imported by every module (do that by binding the importer to a variable).</li>
<li>FIXED: do not try to debug over commit.</li>
<li>FIXED: make top-level more SICStus like on how to present variable bindings.</li>
<li>NEW: support columns in <code>format/2</code> and <code>format/3</code>.</li>
<li>FIXED: <code>p_number</code> and friends should check for var before checking for number with corouting support.</li>
<li>FIXED: init was setting WakeUpCode too late.</li>
<li>FIXED: <code>save_program</code> was not restoring WakeUpCode.</li>
<li>FIXED: <code>terms</code> library.</li>
<li>NEW: SICStus compatible <code>prolog_flag/3</code>.</li>
<li>FIXED: <code>\+ \+ nondet1, !, nondet2</code>.</li>
<li>SPEEDUP: improved exec path.</li>
<li>FIXED: hold locks for longer in <code>i_recorded</code>.</li>
<li>CLEANUP: avoid references to corouting data structures in non-corouting code.</li>
<li>NEW: new hashing function for IDB.</li>
<li>FIXED: make <code>profile_data</code> understand modules.</li>
<li>FIXED: first argument for profile_data was inconsistent.</li>
<li>FIXED: broken trail resetting in <code>p_read</code> (thks G.J. VanNoord).</li>
<li>CLEANUP: ANSI-C code cleanup (thks S. Konstantopoulos).</li>
<li>CLEANUP: new <code>Atom.h.m4</code> file splits some stuff from <code>Yatom.h.m4</code>.</li>
<li>CLEANUP: <code>linkblk</code> with one less argument and faster code (hopefully).</li>
<li>FIXED: get rid of <code>AtomBase</code>.</li>
<li>FIXED: keep ordering between <code>MkFunctor</code> and friends.</li>
<li>FIXED: <code>PreviousHeap</code> is trash.</li>
<li>FIXED: too many calls to <code>MkFunctor</code> in <code>GetPred</code>.</li>
</ul>
<h2>Yap-4.3.9:</h2>
<ul>
<li>FIXED: VC++ compilation was broken.</li>
<li>FIXED: handle trail overflows in Windows.</li>
<li>FIXED: general fixes as cygnus compilation was broken.</li>
<li>FIXED: <code>yap.exp</code> got out of sync.</li>
<li>FIXED: YAP would include too many headers such as <code>sys/time.h</code> and <code>sys/wait.h</code> breaking <code>-mno-cygwin</code>.</li>
<li>FIXED: don't trust in <code>string.h</code> to initialise <code>NULL</code>, this seems to cause weird problems in <code>gcc -mno-cygwin</code>.</li>
<li>FIXED: lack of heap in assembler shouldn't force compiler to restart.</li>
<li>FIXED: C-stack would overflow with <code>PermVar</code>, make this function non-recursive.</li>
<li>FIXED: hint <code>growheap</code> on the least heap it needs.</li>
<li>FIXED: expand stack on overflow while parsing and overflow while creating the var table.</li>
<li>FIXED: move <code>ParserStack</code> to <code>Trail</code> so that we can read in very large terms.</li>
<li>FIXED: recursion of <code>c_optimise</code> would break for very large clauses, replaced it by iteration.</li>
<li>CLEANUP: replace defined for <code>enum</code> in <code>Yatom.h.m4</code>.</li>
<li>FIXED: bug in compiled terms with DBRefs (same field was used for <code>CodePtr</code> and <code>RefPtr</code>).</li>
<li>FIXED: guarantee correct locking for <code>PreAllocCodeSpace()</code>.</li>
<li>FIXED: another typo in <code>charsio</code>.</li>
<li>FIXED: always allow asserts but careful, for now system will only recover some space at top-level.</li>
<li>FIXED: In <code>yap.c</code> read <code>false</code> before someone hides it ;-).</li>
<li>CLEANUP: get rid of <code>AtomLive</code> and of <code>AtomFalse</code>.</li>
<li>FIXED: <code>erase/1</code> and <code>erased/1</code> now complain on bad arguments.</li>
<li>FIXED: ANALYST would not compile.</li>
<li>FIXED: go round bad <code>FILENAME_MAX</code> in HPUX (Stasinos Konstantopoulos).</li>
<li>CLEANUP: use <code>sed</code> instead of symbolic links in <code>make depended</code> (Stasinos Konstantopoulos).</li>
<li>FIXED: don't check if someone is looking at an environment while asserting.</li>
<li>FIXED: gc always assumed an immediate <code>DBRef</code>.</li>
<li>FIXED: <code>!</code> now cuts if <code>!=</code> instead of <code><</code> (fixed cut_by).</li>
<li>FIXED: __hpux to __hpux (Stasinos Konstantopoulos).</li>
<li>FIXED: <code>makedepend</code> works again (Stasinos Konstantopoulos).</li>
<li>FIXED: compile under hpux cc (Stasinos Konstantopoulos).</li>
<li>NEW: locking for internal data base.</li>
<li>FIXED: bad cast in <code>DBProp</code>.</li>
</ul>
<h2>Yap-4.3.8:</h2>
<ul>
<li>FIXED: previous change to <code>!</code> was wrong.</li>
<li>FIXED: <code>YAP_ARRAYS</code> was still being used in <code>arrays.c</code> and <code>sbaamiops.h</code>.</li>
<li>FIXED: small glitches in the manual.</li>
<li>NEW: change work dir from Yap4 to Yap-4 (that's what everyone else does).</li>
<li>NEW: <code>make install_info</code>.</li>
<li>NEW: <code>yap.spec</code> and automatic generation of rpms.</li>
</ul>
<h2>Yap4.3.7:</h2>
<ul>
<li>FIXED: fix SBA bug in <code>or.cuts.h</code>.</li>
<li>NEW: cut now looks for <code>==</code>, not <code><</code>.</li>
<li>NEW: <code>FunctorList</code> is now special.</li>
<li>FIXED: Looking up "<code>.</code>" was broken.</li>
<li>FIXED: <code>halt/1</code> would not send out the error code.</li>
<li>NEW: allow executable Prolog files that call YAP (option <code>-L</code>).</li>
<li>FIXED: bad overflow handling when compiling very large terms.</li>
<li>FIXED: bugs in <code>charsio</code> at <code>open_chars_stream</code> and <code>number_to_chars</code>.</li>
<li>FIXED: search for <code>library()</code> did not use env var <code>YAPLIBDIR</code>.</li>
<li>NEW: parallel locking for MIPS machines.</li>
<li>NEW: parallel locking for Alpha machines.</li>
<li>FIXED: In OPTYAP UNLOCK should be machine dependent.</li>
<li>FIXED: In linux, SBA would mess up with DB because MBIT was in <code>binding_array</code> addresses. Fix that and include a check when we allocate BA space.</li>
<li>NEW: Protect DB updates and use with immediate update semantics.</li>
<li>FIXED: get rid of the stuff on searching whether a predicate is in use for YAPOR, as it wouldn't work.</li>
<li>FIXED: disallow asserting and abolishing static procedures in YAPOR.</li>
<li>NEW: allow asserting database references as arguments for dynamic procedures.</li>
<li>FIXED: consult and friends are now directives (this should avoid trouble with YAPOR).</li>
<li>FIXED: change <code>configure.in</code> for Alpha/Linux.</li>
<li>FIXED: change YAPOR not to try to do parallel execution of consult.</li>
<li>FIXED: protect goals from <code>save_program/2</code> and also make sure they don't fail.</li>
<li>FIXED: <code>[a]</code> in top level should be executed as a query.</li>
<li>CLEANUP: get rid of <code>c_csult_stream</code>.</li>
<li>FIXED: fix predicates that depended on <code>current_stream</code> returning user name for file.</li>
<li>FIXED: <code>close/1</code> and <code>close/2</code> should only close atomic filenames in YAP mode, and should not depend on current_stream/3 returning the original name.</li>
<li>FIXED: <code>current_stream</code> should return real name, not user name.</li>
<li>CLEANUP: add consult/reconsult mode and file name to consult stack.</li>
<li>FIXED: force indexing immediately after consult in YAPOR. This guarantees the system will not get into trouble later trying to generate indexing code for a predicate while someone is entering it.</li>
<li>FIXED: bad init interface with YAPOR.</li>
<li>NEW: support partial locking for predicates.</li>
<li>FIXED: wrong include path in regex's <code>Makefile.in</code>.</li>
<li>FIXED: <code>bb_new</code> was doing a broken property insert.</li>
<li>FIXED: <code>save_program</code> now restores <code>SpyCode</code> so that we can restart saved states with spying data.</li>
<li>FIXED: <code>YapInit</code> wasn't using stack size info from saved states.</li>
</ul>
<h2>Yap4.3.6:</h2>
<ul>
<li>FIXED: <code>YapRunGoal</code> wasn't saving/restoring registers properly, thus breaking the alpha platform.</li>
<li>FIXED: could not find saved state.</li>
<li>FIXED: bad substitution in saved states.</li>
<li>NEW: <code>-l</code> option for YAP (consult a Prolog file).</li>
<li>CLEANUP: <code>-l</code> option for YAPOR is now <code>-sl</code>.</li>
<li>CLEANUP: small cleanups in yap.c.</li>
</ul>
<h2>Yap4.3.5:</h2>
<ul>
<li>NEW: add <code>yap_libdir</code>.</li>
<li>NEW: add splay trees.</li>
<li>NEW: add AVL trees.</li>
<li>FIXED: asserting static predicates would not store the right source.</li>
<li>FIXED: <code>assert</code> would loop with <code>assert((H:-b))</code>.</li>
<li>FIXED: GC bug would not process direct pointers from local or trail to lists in code space.</li>
<li>NEW: change directory structure.</li>
<li>NEW: support locking for arrays.</li>
<li>NEW: support locking for operators.</li>
<li>NEW: support locking for values.</li>
<li>FIXED: bad comparison with <code>BB</code> in <code>write_val</code> (SBA).</li>
<li>NEW: support locking on alloc/free.</li>
<li>NEW: support locking on blackboard.</li>
<li>NEW: support locking for individual atoms (protects the property list).</li>
<li>NEW: support locking the atom table.</li>
<li>NEW: sequential code should now compile empty locks.</li>
<li>FIXED: YAP again compiles and runs under AIX4.1.</li>
<li>FIXED: support creating YAP DLL with VC++.</li>
<li>FIXED: VC++ didn't understand <code>S_ISDIR()</code>.</li>
<li>FIXED: small fixes to <code>yap.tex</code>.</li>
<li>FIXED: unsigned/sign comparison warnings in VC++.</li>
</ul>
<h2>Yap4.3.4:</h2>
<ul>
<li>FIXED: IRIX6 is now set up load DLLs.</li>
<li>FIXED: Yap4.3.3 had broken register handling in <code>c_interface.c</code>.</li>
<li>FIXED: bug in <code>library/regex/Makefile.in</code>.</li>
<li>FIXED: FreeBSD/ELF is now set up to load DLLs.</li>
<li>FIXED: <code>in_limbo</code> should now be correct.</li>
<li>FIXED: YAPOR would not compile because of macros.</li>
</ul>
<h2>Yap4.3.3:</h2>
<ul>
<li>FIXED: recover space after every parse/compile in new <code>yap.c</code>.</li>
<li>FIXED: ignore <code>getcwd</code> under simplescalar.</li>
<li>FIXED: only include standard files after YAP headers.</li>
<li>FIXED: save and restore registers correctly under c-interface.</li>
<li>NEW: add <code>YapWrite</code> to C-Interface.</li>
<li>FIXED: mmapped arrays do not compile with <code>simplescalar</code>.</li>
<li>FIXED: force saved states to look up YAP in YAPBINDIR.</li>
<li>FIXED: quoted strings go back to ISO.</li>
<li>FIXED: <code>-DYAP_ARRAYS</code> is no longer an option.</li>
<li>FIXED: get rid of a few of ANSI-C old-style warnings from lcc.</li>
<li>FIXED: <code>TrueFileName</code> had been broken.</li>
<li>FIXED: Yap now configures and compiles with lcc 4.1/Linux.</li>
<li>FIXED: port yap to compile under cygwin 1.1.0/mingw32 and to support winsock2. The new version also supports <code>CreateWaitableTimer</code>.</li>
<li>FIXED: force yap to follow environment variable <code>YAPLIBDIR</code>.</li>
<li>FIXED: force yap to look for dlls in library.</li>
<li>FIXED: replace <code>strcat</code> and <code>strcpy</code> by <code>strncat</code> and <code>strncpy</code>.</li>
<li>FIXED: search for saved states in library.</li>
<li>FIXED: <code>^c-a</code> in MINGW32.</li>
<li>CLEANUP: <code>^C</code> handling.</li>
<li>NEW: creating and loading dll now works in YAP/WIN.</li>
<li>NEW: compile core YAP as a dll under MINGW32.</li>
<li>NEW: <code>yap.c</code> is now external to YAP.</li>
<li>NEW: understand Unix paths under WIN32 and MINGW32.</li>
<li>FIXED: make sure you only start compiling objects after having all headers ready.</li>
<li>FIXED: Debugger (<code>$spycalls</code>) should module switches and consulted the table of imported predicates.</li>
<li>FIXED: Compilation bug and warnings under vc++.</li>
<li>FIXED: <code>YAP_ARRAYS</code> required <code>TERM_EXTENSIONS</code> to compile.</li>
<li>FIXED: compile under cygwin's <code>gcc -mno-cygwin</code>, so that YAP won't need the cygwin dll (MINGW32).</li>
<li>FIXED: <code>save.c</code> should reinitialise user streams.</li>
<li>FIXED: <code>predentries</code> for functions may change address in <code>save.c</code>.</li>
<li>FIXED: <code>SimpleSim</code> does not implement <code>getcwd</code>.</li>
<li>FIXED: <code>tracer.c</code> had a C++ comment.</li>
<li>FIXED: <code>ttyname</code> might return <code>NULL</code>, at least in <code>SimpleSim</code>.</li>
<li>FIXED: <code>reconsult</code> was broken.</li>
<li>FIXED: bracket messages for syntax errors.</li>
<li>FIXED: scanner would break if <code>AllocScannerSpace</code> failed.</li>
<li>FIXED: bad checking of <code>eof_action</code> in open.</li>
<li>FIXED: mistake in compiling <code>/\</code>.</li>
<li>FIXED: extra clauses in <code>environ</code>.</li>
<li>FIXED: checking list of operators was wrong in <code>op/3</code>.</li>
<li>FIXED: missing variable in error message.</li>
<li>FIXED: reset <code>CreepFlag</code> in <code>Error</code>.</li>
<li>FIXED: wrong error in <code>name(int(X),_)</code>.</li>
<li>FIXED: fix writing "<code>\</code>" when writing strings with no character escapes.</li>
<li>NEW: add <code>yap_flag(write_strings,X)</code> as in Ciao.</li>
<li>NEW: add <code>StringToBuffer</code> routine to the c-interface.</li>
<li>NEW: add routines for allocating and releasing database space to the c-interface.</li>
<li>FIXED: change type for <code>unify</code> in <code>CInterface</code>.</li>
<li>FIXED: <code>PlUnGetc</code> should return <code>int</code>, not <code>Int</code>.</li>
<li>FIXED: get rid of C++ comment in <code>save.c</code>.</li>
</ul>
<h2>Yap4.3.2:</h2>
<ul>
<li>FIXED: Yap can now use <code>shm</code> for memory allocation.</li>
<li>NEW: Yap can use <code>malloc</code> if <code>mmap</code>, <code>shm</code>, and <code>sbrk</code> failed.</li>
<li>FIXED: <code>sbrk</code> allocation should be working again.</li>
<li>CLEANUP: get rid of unused functions in old <code>alloc.c</code>.</li>
<li>CLEANUP: in <code>Yap.h.m4</code> make clear when you are in second quadrant.</li>
<li>CLEANUP: keep table with all c-predicates. <code>restore</code> now does not need to reinitialise functions.</li>
<li>FIXED: in <code>alloc.c</code>, handle cases where <code>/dev/zero</code> fails properly.</li>
<li>CLEANUP: move atoms and functors into <code>heap_codes</code>.</li>
<li>CLEANUP: move module info to <code>heap_codes</code>.</li>
<li>FIXED: <code>save.c</code> would not restore properly <code>bfunc</code> instructions. Had to add a p field for these instructions.</li>
<li>FIXED: <code>save.c</code> was not always restoring <code>pp->OpcodeOfPred</code>.</li>
<li>FIXED: reset opcode-op hash-table in new calls to <code>InitReverseLookupOpcode</code>.</li>
<li>FIXED: check if emulator shifted when recovering saved states.</li>
<li>NEW: <code>charsio</code>, SICStus compatible reading to and writing from strings.</li>
<li>FIXED: uncaught instantiation errors in eval routines.</li>
<li>NEW: <code>yap_flag(character_escapes,{on,off})</code>.</li>
<li>CLEANUP: get rid of <code>config.c</code>.</li>
</ul>
<h2>Yap4.3.1:</h2>
<ul>
<li>FIXED: <code>$call</code> and <code>$spied_call</code> used with one less argument by debugger.</li>
<li>FIXED: bug in <code>repeat</code> from top level.</li>
<li>FIXED: <code>MAX_DEPTH</code> was set too high.</li>
<li>FIXED: use actual definition of <code>repeat</code>.</li>
<li>FIXED: use <code><</code> to compare cps for <code>!</code>, not <code>==</code> because of <code>(! ->)</code>.</li>
<li>FIXED: <code>$set_depth_limit</code> should work with Integer, not Int.</li>
<li>FIXED: Allow Linux to compile without <code>getrusage</code> but using times (problem with glibc/kernel).</li>
</ul>
<p>
Yap4.3.0 has been released.
</p>
<h1>Changes in YAP4.2</h1>
<h2>Yap4.2.1:</h2>
<ul>
<li>FIXED: up release number.</li>
<li>FIXED: swap order of first authors in the manual.</li>
<li>NEW: more patches for OPTYap.</li>
<li>FIXED: not all Linuxen that have <code>fpu_control.h</code> understand <code>_FPU_SETCW</code>.</li>
</ul>
<h2>Yap4.2.0pl18:</h2>
<ul>
<li>FIXED: <code>DebugPutc</code>.</li>
<li>FIXED: SBA must initialise or set public permanent variables in the SBA.</li>
<li>FIXED: get rid of a Prolog definition for <code>number_codes</code>.</li>
<li>FIXED: <code>YOUNGER</code> out of OPTYap and renamed <code>YOUNGER_CP</code>.</li>
<li>FIXED: don't use offsets to local in SBA.</li>
<li>FIXED: make <code>DelayedB</code> and <code>TopB</code> actual choicepointers to support SBA.</li>
<li>FIXED: memory allocation for FreeBSD.</li>
<li>RW Locks are now in YAP (unused yet).</li>
<li>FIXED: dynamic arrays were getting too complex, allow the heap to point to the global stack and change garbage collector to handle it. YAP_ARRAYS is now compatible with everything ;-) and can stop being an option.</li>
<li>FIXED: cut used <code><</code> instead of <code>!=</code>.</li>
<li>NEW: new YapOr code from Ricardo.</li>
<li>FIXED: a few complaints with Solaris.</li>
<li>NEW: generate exceptions in ISO mode for HP-UX.</li>
<li>FIXED: <code>use_module</code> relies on <code>ensure_loaded</code>, which is now a directive.</li>
<li>FIXED: 64/32 bit errors in Alpha.</li>
<li>FIXED: <code>SEG_SIZE</code> is pre-defined in HP platform.</li>
<li>FIXED: should call <code>Error</code> only after leaving interrupt handler, otherwise <code>sigsetjmp</code> will overwrite registers.</li>
<li>FIXED: fill <code>CharConversionTable</code> with null chars.</li>
<li>FIXED: warning in PowerPCs.</li>
</ul>
<h2>Yap4.2.0pl17:</h2>
<ul>
<li>FIXED: more improvements to <code>Eval</code>.</li>
<li>NEW: <code>predicate_property(X,public)</code>.</li>
<li>NEW: <code>public/1</code> directive, handling of source was cleaned up (it used to be broken if one would switch between source and no-source).</li>
<li>NEW: special meta-call handling for ISO mode. Reduce amount of testing for other cases.</li>
<li>CLEANUP: complete cleanup of <code>eval</code>. No more duplicate code, no more <code>reg</code> and <code>fli</code>.</li>
<li>SPEEDUP: move <code>get_spy_creep</code> to <code>yap_flags</code>. This speeds up execute a bit.</li>
<li>NEW: <code>strict_iso</code> mode.</li>
<li>CLEANUP: <code>InitEval</code>.</li>
<li>FIXED: arithmetic should be consistent even after an error.</li>
<li>NEW: implement ISO exception handling for operations between floating-point numbers in Linux.</li>
<li>NEW: handle floating point exceptions.</li>
<li>CLEANUP: get rid of <code>EQUAL_FLOATS</code> and <code>EQUAL_LONG_INTS</code> as they weren't used any longer (and they were wrong anyway).</li>
<li>NEW: add <code>e</code>, I've always liked this constant better than <code>pi</code>.</li>
<li>FIXED: get a better <code>pi</code>.</li>
<li>FIXED: fix <code>round</code> and friends for ISO mode.</li>
<li>NEW: add <code>xor</code> (#) and <code>sign</code>.</li>
<li>FIXED: get rid of finite, change integer the limits in YAP.</li>
<li>FIXED: define <code>atanh</code> and friends for VC++ environments.</li>
<li>FIXED: Get <code>PlGetChar()</code> back in, as users may want a simple interface to the current input for their own dubious purposes.</li>
<li>NEW: <code>yap_flag(discontiguous_warnings, single_var_warnings, redefine_warnings)</code> as in SICStus. This should eventually replace style_check and no_style_check.</li>
<li>FIXED: do not mark or sweep environments twice. This fixes Bart's YAP GC performance bug (as mentioned in comp.lang.prolog!).</li>
<li>NEW: do variable shunting, not that it helps very much.</li>
<li>FIXED: save should only save as many registers as it needs, and the ones it does should be adjusted when restoring.</li>
<li>NEW: <code>stream_select/3</code>.</li>
<li>NEW: <code>save/2</code>.</li>
<li>NEW: <code>char_conversion/2</code> and <code>current_char_conversion</code>. Add ISOGetc for this, change scanner for having two getcs (one within strings, the other elsewhere).</li>
<li>FIXED: was recording source for optimised clauses, not just source for module preprocessed clause.</li>
<li>CLEANUP: add specialised versions to <code>PlGetc()</code>: Sockets, EOF, Readline, and Console.</li>
<li>CLEANUP: got rid of <code>PlGetChar()</code>.</li>
<li>CLEANUP: replaced <code>PlPutc()</code> by specialised versions for each type of stream: File, Console, Socket, Socket+Console, and Null.</li>
<li>CLEANUP: got rid of <code>PlPutChar()</code>.</li>
<li>FIXED: ISO compatible mode for <code>floor</code> and friends.</li>
<li>FIXED: YAP would crash with <code>INTEGER mod 0</code>.</li>
<li>FIXED: miscellaneous error handling in <code>eval</code>.</li>
<li>FIXED: <code>number_chars</code> and friends should be compatible with scanner.</li>
<li>FIXED: <code>stream_property</code> should not work with aliases.</li>
<li>NEW: <code>char_code/2</code>.</li>
<li>FIXED: ISO mode activates <code>fileerrors</code>.</li>
<li>FIXED: avoid using <code>atom_chars</code> within the system.</li>
<li>FIXED: <code>number_chars(X,I)</code> and <code>number_codes/2</code> with bad I should give error in ISO mode.</li>
<li>FIXED: make ISO <code>abolish/1</code> succeed for undefined procedures.</li>
<li>FIXED: <code>number_chars</code> and <code>atom_chars</code> should be ISO compatible in ISO mode.</li>
<li>FIXED: errors in <code>call</code> should throw ISO errors.</li>
<li>FIXED: <code>functor/3</code> should now have standard ISO behaviour on errors.</li>
<li>FIXED: <code>assert(X)</code> would loop.</li>
<li>FIXED: <code>char_conversion/2</code> is now also a directive.</li>
<li>FIXED: <code>ensure_loaded/1</code> should be directive and not a built-in.</li>
<li>FIXED: <code>current_predicate/1</code> should not show system predicates and should be module aware.</li>
<li>FIXED: <code>utilpred.s</code> now compiles with <code>-DEUROTRA</code>.</li>
<li>FIXED: <code>abolish/1</code> had several nasty bugs, especially in ISO mode.</li>
<li>CLEANUP: got rid of nasty <code>config.cache</code> in main directory.</li>
<li>FIXED: <code>op/3</code> and <code>set_prolog_flag/2</code> are directives.</li>
</ul>
<h2>Yap4.2.0pl16:</h2>
<ul>
<li>FIXED: <code>retractall</code> was broken.</li>
</ul>
<h2>Yap4.2.0pl15:</h2>
<ul>
<li>FIXED: in <code>catch/3</code> set module to original module before handling a ball.</li>
<li>SPEEDUP: improve testing with DEPTH_LIMIT.</li>
<li>FIXED: <code>DEPTH_LIMIT</code> should only stop code running under <code>depth_bound_call/2</code>.</li>
<li>FIXED: bug in parse_args (fix from Stasinos Konstantopoulos <konstant@let.rug.nl>).</li>
<li>FIXED: <code>copy_term/2</code> should now be able to copy constraints.</li>
<li>FIXED: faster version of <code>copy_term/2</code> should now handle rational trees.</li>
<li>NEW: generate ps version of manual with make ps.</li>
<li>FIXED: disable save term optimisation for extensions, as we may not have an S ready.</li>
<li>CLEANUP: always use '<code>$execute</code>' instead of call internally.</li>
<li>CLEANUP: get rid of '<code>$user_call</code>' as it should the same as '<code>$execute</code>'.</li>
<li>NEW: separate between the standard catch, that uses the full meta-call, and a system catch, that uses <code>$execute0</code> and <code>$mod_switch</code> and that should be only used deep within the bowels of the system.</li>
<li>FIXED: expanded head variables of meta_predicates should not be expanded by inner meta-calls.</li>
<li>FIXED: <code>HAVE_STAT</code> was not being generated correctly by <code>autoconf</code>.</li>
<li>NEW: <code>timeout:time_out</code>.</li>
<li>FIXED: make sure catch handlers are processed from within user.</li>
<li>FIXED: processing of style_check by <code>yap_flag(language,_)</code>.</li>
<li>FIXED: <code>discontiguous</code> should now be module aware.</li>
<li>FIXED: preprocess calls for meta-predicates from top-level.</li>
<li>FIXED: simplify code that handles the fact that modules from primitives can be called from anywhere.</li>
<li>FIXED: <code>$module_expansion</code> could be called with wrong number of arguments.</li>
<li>FIXED: separate '$execute', the low-level mechanism for meta-call, from '$user_call', that must study meta-predicates.</li>
<li>FIXED: <code>README.VC</code>.</li>
</ul>
<h2>Yap4.2.0pl14:</h2>
<ul>
<li>FIXED: allow big flags.</li>
<li>FIXED: typos in <code>yap.tex</code>.</li>
<li>NEW: <code>yap_flag(host_type,X)</code>, where <code>X</code> comes from <code>configure</code>.</li>
<li>NEW: more cleanups for autoconf.</li>
<li>FIXED: more cleanups for <code>autoconf</code>.</li>
<li>NEW: use <code>-DBP_FREE</code> by default for X86 machines.</li>
<li>FIXED: make <code>predicate_property</code> more SICStus Prolog compatible.</li>
<li>NEW: language mode now changes action over dynamic and over directives.</li>
<li>NEW: initial DLL support for WIN32.</li>
<li>FIXED: optimise arithmetic for asserted clauses.</li>
<li>FIXED: calling garbage collector from within a C-backtrackable built-in should also have the extra arguments to the choice-point ready.</li>
<li>NEW: YAP should now be able to load DLLs in WIN32.</li>
<li>FIXED: YAP will now stop creeping after an abort.</li>
<li>FIXED: meta-call within the debugger was externally visible.</li>
<li>FIXED: small ANSI-C compatibility thingies.</li>
<li>FIXED: <code>writeq('aaa===\\''====')</code> now outputs properly.</li>
<li>NEW: <code>yap_flags(update_semantics,logical_assert)</code> if you only want to use logical update semantics for asserted code.</li>
<li>NEW: <code>yap_flags(language,{cprolog,sicstus,iso})</code>.</li>
<li>FIXED: do not test for worken goals before !, it slows down execution too much.</li>
<li>NEW: improve the performance of <code>==/2</code>.</li>
<li>FIXED: compile without COROUTINING.</li>
<li>FIXED: manual would not compile.</li>
</ul>
<h2>Yap4.2.0pl13:</h2>
<ul>
<li>FIXED: <code>term_expansion</code> should be called in user module.</li>
<li>FIXED: include new operation <code>sderef_op</code> when we want to know what a constrained variable is bound to.</li>
<li>FIXED: <code>try_logical_pred</code> depended on <code>B</code>, but <code>B</code> might have been cut. Use trail for the moment.</li>
<li>FIXED: call of <code>project_attributes</code>.</li>
<li>NEW: blackboard routines <code>bb_get</code>, <code>bb_put</code>, <code>bb_delete</code>, <code>bb_update</code>, and <code>yap_flag(n_of_integer_keys_in_bb,INT)</code>. Includes a new file, bb.c.</li>
<li>NEW: <code>yap_flag(n_of_integer_keys_in_db,INT)</code>: dynamically set the number of entries for the hash table used in looking up integer keys for the data-base.</li>
</ul>
<h2>Yap4.2.0pl12:</h2>
<ul>
<li>NEW: <code>README.VC</code> for VisualC++ users.</li>
<li>FIXED: several small changes for VisualC++.</li>
<li>FIXED: <code>_WIN32</code> requires <code>LOWTAGS</code> (<code>0x3000000</code> kind of address) for garbage collection to work.</li>
<li>FIXED: <code>UnifyBound</code> was not handling extensions right.</li>
<li>FIXED: had wrong definition for non-gcc <code>EXTRA_CBACK_ARG</code>.</li>
<li>FIXED: make Yap compile under VisualC++ 6.0 again.</li>
<li>FIXED: <code>exit_yap</code> would not exit.</li>
</ul>
<h2>Yap4.2.0pl11:</h2>
<ul>
<li>FIXED: <code>multifile</code> was not complaining on missing declaration.</li>
<li>FIXED: multifile declarations were not module aware.</li>
<li>CLEANUP: <code>assert/1</code> and <code>dynamic/1</code>.</li>
<li>FIXED: for the nth time tried to make modules SICStus compatible :-(.</li>
<li>NEW: integrated latest version of YAPOR (SBA and ACOW still do not work).</li>
</ul>
<h2>Yap4.2.0pl10:</h2>
<ul>
<li>FIXED: could have a bad cut in <code>call(X->Y)</code>.</li>
<li>FIXED: add <code>ord_intersect/3</code> again (same as <code>ord_intersection/3</code>).</li>
<li>FIXED: <code>save_program/2</code> would not set prompt correctly.</li>
<li>FIXED: bug in <code>stack_shifter</code> after <code>gc</code> (was shifting global pointers).</li>
<li>FIXED: <code>save/1</code> was broken with coroutining.</li>
<li>FIXED: <code>use_module/2</code> should handle lists of files.</li>
<li>FIXED: <code>COROUTINING</code> depended on <code>DEBUG</code> code.</li>
</ul>
<h2>Yap4.2.0pl9:</h2>
<ul>
<li>FIXED: <code>list_to_assoc/2</code>.</li>
<li>FIXED: ANALYST should compile again.</li>