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#############################################################################
##
#W type1.g GAP library Steve Linton
##
#H @(#)$Id: type1.g,v 4.9.2.2 2008/11/20 14:20:54 gap Exp $
##
#Y Copyright (C) 1997, Lehrstuhl D fuer Mathematik, RWTH Aachen, Germany
#Y (C) 1998 School Math and Comp. Sci., University of St. Andrews, Scotland
#Y Copyright (C) 2002 The GAP Group
##
## This file contains some functions moved from type.g to a place
## where they will be compiled by default
##
Revision.type1_g :=
"@(#)$Id: type1.g,v 4.9.2.2 2008/11/20 14:20:54 gap Exp $";
#############################################################################
##
## attribute getter and setter methods for attribute storing rep
##
InstallAttributeFunction(
function ( name, filter, getter, setter, tester, mutflag )
InstallOtherMethod( getter,
"system getter",
true,
[ IsAttributeStoringRep and tester ],
GETTER_FLAGS,
GETTER_FUNCTION(name) );
end );
LENGTH_SETTER_METHODS_2 := LENGTH_SETTER_METHODS_2 + 6;
InstallAttributeFunction(
function ( name, filter, getter, setter, tester, mutflag )
if mutflag then
InstallOtherMethod( setter,
"system mutable setter",
true,
[ IsAttributeStoringRep,
IS_OBJECT ],
0,
function ( obj, val )
obj!.(name) := val;
SetFilterObj( obj, tester );
end );
else
InstallOtherMethod( setter,
"system setter",
true,
[ IsAttributeStoringRep,
IS_OBJECT ],
0,
SETTER_FUNCTION( name, tester ) );
fi;
end );
#############################################################################
##
#F NewFamily( <name>, ... )
##
Subtype := "defined below";
BIND_GLOBAL( "NEW_FAMILY",
function ( typeOfFamilies, name, req_filter, imp_filter )
local type, pair, family;
# Look whether the category of the desired family can be improved
# using the categories defined by 'CategoryFamily'.
imp_filter := WITH_IMPS_FLAGS( AND_FLAGS( imp_filter, req_filter ) );
type := Subtype( typeOfFamilies, IsAttributeStoringRep );
for pair in CATEGORIES_FAMILY do
if IS_SUBSET_FLAGS( imp_filter, pair[1] ) then
type:= Subtype( type, pair[2] );
fi;
od;
# cannot use 'Objectify', because 'IsList' may not be defined yet
family := rec();
SET_TYPE_COMOBJ( family, type );
family!.NAME := name;
family!.REQ_FLAGS := req_filter;
family!.IMP_FLAGS := imp_filter;
family!.TYPES := [];
family!.nTYPES := 0;
family!.HASH_SIZE := 32;
# for chaching types of homogeneous lists (see TYPE_LIST_HOM in list.g),
# assigned in kernel when needed
family!.TYPES_LIST_FAM := [];
# for efficiency
family!.TYPES_LIST_FAM[27] := 0;
return family;
end );
BIND_GLOBAL( "NewFamily2", function ( typeOfFamilies, name )
return NEW_FAMILY( typeOfFamilies,
name,
EMPTY_FLAGS,
EMPTY_FLAGS );
end );
BIND_GLOBAL( "NewFamily3", function ( typeOfFamilies, name, req )
return NEW_FAMILY( typeOfFamilies,
name,
FLAGS_FILTER( req ),
EMPTY_FLAGS );
end );
BIND_GLOBAL( "NewFamily4", function ( typeOfFamilies, name, req, imp )
return NEW_FAMILY( typeOfFamilies,
name,
FLAGS_FILTER( req ),
FLAGS_FILTER( imp ) );
end );
BIND_GLOBAL( "NewFamily5",
function ( typeOfFamilies, name, req, imp, filter )
return NEW_FAMILY( Subtype( typeOfFamilies, filter ),
name,
FLAGS_FILTER( req ),
FLAGS_FILTER( imp ) );
end );
BIND_GLOBAL( "NewFamily", function ( arg )
# NewFamily( <name> )
if LEN_LIST(arg) = 1 then
return NewFamily2( TypeOfFamilies, arg[1] );
# NewFamily( <name>, <req-filter> )
elif LEN_LIST(arg) = 2 then
return NewFamily3( TypeOfFamilies, arg[1], arg[2] );
# NewFamily( <name>, <req-filter>, <imp-filter> )
elif LEN_LIST(arg) = 3 then
return NewFamily4( TypeOfFamilies, arg[1], arg[2], arg[3] );
# NewFamily( <name>, <req-filter>, <imp-filter>, <family-filter> )
elif LEN_LIST(arg) = 4 then
return NewFamily5( TypeOfFamilies, arg[1], arg[2], arg[3], arg[4] );
# signal error
else
Error( "usage: NewFamily( <name>, [ <req> [, <imp> ]] )" );
fi;
end );
#############################################################################
##
#F NewType( <family>, <filter> [,<data>] )
##
NEW_TYPE_CACHE_MISS := 0;
NEW_TYPE_CACHE_HIT := 0;
BIND_GLOBAL( "NEW_TYPE", function ( typeOfTypes, family, flags, data )
local hash, cache, cached, type, ncache, ncl, t;
# maybe it is in the type cache
cache := family!.TYPES;
hash := HASH_FLAGS(flags) mod family!.HASH_SIZE + 1;
if IsBound( cache[hash] ) then
cached := cache[hash];
if IS_EQUAL_FLAGS( flags, cached![2] ) then
if IS_IDENTICAL_OBJ( data, cached![ POS_DATA_TYPE ] )
and IS_IDENTICAL_OBJ( typeOfTypes, TYPE_OBJ(cached) )
then
NEW_TYPE_CACHE_HIT := NEW_TYPE_CACHE_HIT + 1;
return cached;
else
flags := cached![2];
fi;
fi;
NEW_TYPE_CACHE_MISS := NEW_TYPE_CACHE_MISS + 1;
fi;
# get next type id
NEW_TYPE_NEXT_ID := NEW_TYPE_NEXT_ID + 1;
if NEW_TYPE_NEXT_ID >= NEW_TYPE_ID_LIMIT then
GASMAN("collect");
FLUSH_ALL_METHOD_CACHES();
NEW_TYPE_NEXT_ID := COMPACT_TYPE_IDS();
#Print("#I Compacting type IDs: ",NEW_TYPE_NEXT_ID+2^28," in use\n");
fi;
# make the new type
# cannot use 'Objectify', because 'IsList' may not be defined yet
type := [ family, flags ];
type[POS_DATA_TYPE] := data;
type[POS_NUMB_TYPE] := NEW_TYPE_NEXT_ID;
SET_TYPE_POSOBJ( type, typeOfTypes );
# check the size of the cache before storing this type
if 3*family!.nTYPES > family!.HASH_SIZE then
ncache := [];
ncl := 3*family!.HASH_SIZE+1;
for t in cache do
ncache[ HASH_FLAGS(t![2]) mod ncl + 1] := t;
od;
family!.HASH_SIZE := ncl;
family!.TYPES := ncache;
ncache[HASH_FLAGS(flags) mod ncl + 1] := type;
else
cache[hash] := type;
fi;
family!.nTYPES := family!.nTYPES + 1;
# return the type
return type;
end );
BIND_GLOBAL( "NewType2", function ( typeOfTypes, family )
return NEW_TYPE( typeOfTypes,
family,
family!.IMP_FLAGS,
false );
end );
BIND_GLOBAL( "NewType3", function ( typeOfTypes, family, filter )
return NEW_TYPE( typeOfTypes,
family,
WITH_IMPS_FLAGS( AND_FLAGS(
family!.IMP_FLAGS,
FLAGS_FILTER(filter) ) ),
false );
end );
BIND_GLOBAL( "NewType4", function ( typeOfTypes, family, filter, data )
return NEW_TYPE( typeOfTypes,
family,
WITH_IMPS_FLAGS( AND_FLAGS(
family!.IMP_FLAGS,
FLAGS_FILTER(filter) ) ),
data );
end );
BIND_GLOBAL( "NewType5",
function ( typeOfTypes, family, filter, data, stuff )
local type;
type := NEW_TYPE( typeOfTypes,
family,
WITH_IMPS_FLAGS( AND_FLAGS(
family!.IMP_FLAGS,
FLAGS_FILTER(filter) ) ),
data );
type![ POS_FIRST_FREE_TYPE ] := stuff;
#T really ??
return type;
end );
BIND_GLOBAL( "NewType", function ( arg )
local type;
# check the argument
if not IsFamily( arg[1] ) then
Error("<family> must be a family");
fi;
# only one argument (why would you want that?)
if LEN_LIST(arg) = 1 then
type := NewType2( TypeOfTypes, arg[1] );
# NewType( <family>, <filter> )
elif LEN_LIST(arg) = 2 then
type := NewType3( TypeOfTypes, arg[1], arg[2] );
# NewType( <family>, <filter>, <data> )
elif LEN_LIST(arg) = 3 then
type := NewType4( TypeOfTypes, arg[1], arg[2], arg[3] );
# NewType( <family>, <filter>, <data>, <stuff> )
elif LEN_LIST(arg) = 4 then
type := NewType5( TypeOfTypes, arg[1], arg[2], arg[3], arg[4] );
# otherwise signal an error
else
Error("usage: NewType( <family> [, <filter> [, <data> ]] )");
fi;
# return the new type
return type;
end );
#############################################################################
##
#F Subtype( <type>, <filter> )
##
BIND_GLOBAL( "Subtype2", function ( type, filter )
local new, i;
new := NEW_TYPE( TypeOfTypes,
type![1],
WITH_IMPS_FLAGS( AND_FLAGS(
type![2],
FLAGS_FILTER( filter ) ) ),
type![ POS_DATA_TYPE ] );
for i in [ POS_FIRST_FREE_TYPE .. LEN_POSOBJ( type ) ] do
if IsBound( type![i] ) then
new![i] := type![i];
fi;
od;
return new;
end );
BIND_GLOBAL( "Subtype3", function ( type, filter, data )
local new, i;
new := NEW_TYPE( TypeOfTypes,
type![1],
WITH_IMPS_FLAGS( AND_FLAGS(
type![2],
FLAGS_FILTER( filter ) ) ),
data );
for i in [ POS_FIRST_FREE_TYPE .. LEN_POSOBJ( type ) ] do
if IsBound( type![i] ) then
new![i] := type![i];
fi;
od;
return new;
end );
Unbind( Subtype );
BIND_GLOBAL( "Subtype", function ( arg )
# check argument
if not IsType( arg[1] ) then
Error("<type> must be a type");
fi;
# delegate
if LEN_LIST(arg) = 2 then
return Subtype2( arg[1], arg[2] );
else
return Subtype3( arg[1], arg[2], arg[3] );
fi;
end );
#############################################################################
##
#F SupType( <type>, <filter> )
##
BIND_GLOBAL( "SupType2", function ( type, filter )
local new, i;
new := NEW_TYPE( TypeOfTypes,
type![1],
SUB_FLAGS(
type![2],
FLAGS_FILTER( filter ) ),
type![ POS_DATA_TYPE ] );
for i in [ POS_FIRST_FREE_TYPE .. LEN_POSOBJ( type ) ] do
if IsBound( type![i] ) then
new![i] := type![i];
fi;
od;
return new;
end );
BIND_GLOBAL( "SupType3", function ( type, filter, data )
local new, i;
new := NEW_TYPE( TypeOfTypes,
type![1],
SUB_FLAGS(
type![2],
FLAGS_FILTER( filter ) ),
data );
for i in [ POS_FIRST_FREE_TYPE .. LEN_POSOBJ( type ) ] do
if IsBound( type![i] ) then
new![i] := type![i];
fi;
od;
return new;
end );
BIND_GLOBAL( "SupType", function ( arg )
# check argument
if not IsType( arg[1] ) then
Error("<type> must be a type");
fi;
# delegate
if LEN_LIST(arg) = 2 then
return SupType2( arg[1], arg[2] );
else
return SupType3( arg[1], arg[2], arg[3] );
fi;
end );
#############################################################################
##
#F FamilyType( <K> ) . . . . . . . . . . . . family of objects with type <K>
##
BIND_GLOBAL( "FamilyType", K -> K![1] );
#############################################################################
##
#F FlagsType( <K> ) . . . . . . . . . . . . flags of objects with type <K>
##
BIND_GLOBAL( "FlagsType", K -> K![2] );
#############################################################################
##
#F DataType( <K> ) . . . . . . . . . . . . . . defining data of the type <K>
#F SetDataType( <K>, <data> ) . . . . . . set defining data of the type <K>
##
BIND_GLOBAL( "DataType", K -> K![ POS_DATA_TYPE ] );
BIND_GLOBAL( "SetDataType", function ( K, data )
K![ POS_DATA_TYPE ]:= data;
end );
#############################################################################
##
#F SharedType( <K> ) . . . . . . . . . . . . . . shared data of the type <K>
##
BIND_GLOBAL( "SharedType", K -> K![ POS_DATA_TYPE ] );
#############################################################################
##
#F TypeObj( <obj> ) . . . . . . . . . . . . . . . . . . . type of an object
##
## returns the type of the object <obj>.
BIND_GLOBAL( "TypeObj", TYPE_OBJ );
#############################################################################
##
#F FamilyObj( <obj> ) . . . . . . . . . . . . . . . . . family of an object
##
## returns the family of the object <obj>.
BIND_GLOBAL( "FamilyObj", FAMILY_OBJ );
#############################################################################
##
#F FlagsObj( <obj> ) . . . . . . . . . . . . . . . . . . flags of an object
##
BIND_GLOBAL( "FlagsObj", obj -> FlagsType( TypeObj( obj ) ) );
#############################################################################
##
#F DataObj( <obj> ) . . . . . . . . . . . . . . defining data of an object
##
BIND_GLOBAL( "DataObj", obj -> DataType( TypeObj( obj ) ) );
#############################################################################
##
#F SharedObj( <obj> ) . . . . . . . . . . . . . . shared data of an object
##
BIND_GLOBAL( "SharedObj", obj -> SharedType( TypeObj( obj ) ) );
#############################################################################
##
#F SetTypeObj( <type>, <obj> )
##
BIND_GLOBAL( "SetTypeObj", function ( type, obj )
if not IsType( type ) then
Error("<type> must be a type");
fi;
if IS_LIST( obj ) then
SET_TYPE_POSOBJ( obj, type );
elif IS_REC( obj ) then
SET_TYPE_COMOBJ( obj, type );
fi;
if not IsNoImmediateMethodsObject(obj) then
RunImmediateMethods( obj, type![2] );
fi;
return obj;
end );
BIND_GLOBAL( "Objectify", SetTypeObj );
#############################################################################
##
#F ChangeTypeObj( <type>, <obj> )
##
BIND_GLOBAL( "ChangeTypeObj", function ( type, obj )
if not IsType( type ) then
Error("<type> must be a type");
fi;
if IS_POSOBJ( obj ) then
SET_TYPE_POSOBJ( obj, type );
elif IS_COMOBJ( obj ) then
SET_TYPE_COMOBJ( obj, type );
elif IS_DATOBJ( obj ) then
SET_TYPE_DATOBJ( obj, type );
fi;
if not IsNoImmediateMethodsObject(obj) then
RunImmediateMethods( obj, type![2] );
fi;
return obj;
end );
BIND_GLOBAL( "ReObjectify", ChangeTypeObj );
#############################################################################
##
#F SetFilterObj( <obj>, <filter> )
##
Unbind( SetFilterObj );
BIND_GLOBAL( "SetFilterObj", function ( obj, filter )
local type, newtype;
if IS_POSOBJ( obj ) then
type:= TYPE_OBJ( obj );
newtype:= Subtype2( type, filter );
SET_TYPE_POSOBJ( obj, newtype );
if not ( IGNORE_IMMEDIATE_METHODS
or IsNoImmediateMethodsObject(obj) ) then
RunImmediateMethods( obj, SUB_FLAGS( newtype![2], type![2] ) );
fi;
elif IS_COMOBJ( obj ) then
type:= TYPE_OBJ( obj );
newtype:= Subtype2( type, filter );
SET_TYPE_COMOBJ( obj, newtype );
if not ( IGNORE_IMMEDIATE_METHODS
or IsNoImmediateMethodsObject(obj) ) then
RunImmediateMethods( obj, SUB_FLAGS( newtype![2], type![2] ) );
fi;
elif IS_DATOBJ( obj ) then
type:= TYPE_OBJ( obj );
newtype:= Subtype2( type, filter );
SET_TYPE_DATOBJ( obj, newtype );
if not ( IGNORE_IMMEDIATE_METHODS
or IsNoImmediateMethodsObject(obj) ) then
RunImmediateMethods( obj, SUB_FLAGS( newtype![2], type![2] ) );
fi;
elif IS_PLIST_REP( obj ) then
SET_FILTER_LIST( obj, filter );
elif IS_STRING_REP( obj ) then
SET_FILTER_LIST( obj, filter );
elif IS_BLIST( obj ) then
SET_FILTER_LIST( obj, filter );
elif IS_RANGE( obj ) then
SET_FILTER_LIST( obj, filter );
else
Error("cannot set filter for internal object");
fi;
end );
BIND_GLOBAL( "SET_FILTER_OBJ", SetFilterObj );
#############################################################################
##
#F ResetFilterObj( <obj>, <filter> )
##
BIND_GLOBAL( "ResetFilterObj", function ( obj, filter )
if IS_AND_FILTER( filter ) then
Error("You can't reset an \"and-filter\". Reset components individually.");
fi;
if IS_POSOBJ( obj ) then
SET_TYPE_POSOBJ( obj, SupType2( TYPE_OBJ(obj), filter ) );
elif IS_COMOBJ( obj ) then
SET_TYPE_COMOBJ( obj, SupType2( TYPE_OBJ(obj), filter ) );
elif IS_DATOBJ( obj ) then
SET_TYPE_DATOBJ( obj, SupType2( TYPE_OBJ(obj), filter ) );
elif IS_PLIST_REP( obj ) then
RESET_FILTER_LIST( obj, filter );
elif IS_STRING_REP( obj ) then
RESET_FILTER_LIST( obj, filter );
elif IS_BLIST( obj ) then
RESET_FILTER_LIST( obj, filter );
elif IS_RANGE( obj ) then
RESET_FILTER_LIST( obj, filter );
else
Error("cannot reset filter for internal object");
fi;
end );
BIND_GLOBAL( "RESET_FILTER_OBJ", ResetFilterObj );
#############################################################################
##
#F SetFeatureObj( <obj>, <filter>, <val> )
##
BIND_GLOBAL( "SetFeatureObj", function ( obj, filter, val )
if val then
SetFilterObj( obj, filter );
else
ResetFilterObj( obj, filter );
fi;
end );
#############################################################################
##
#F SetMultipleAttributes( <obj>, <attr1>, <val1>, <attr2>, <val2> ... )
##
## This function should have the same net effect as
##
## Setter( <attr1> )( <obj>, <val1> )
## Setter( <attr2> )( <obj>, <val2> )
## . . .
##
## but hopefully be faster, by amalgamating all the type changes
##
BIND_GLOBAL( "SetMultipleAttributes", function (arg)
local obj, type, flags, attr, val, i, extra, nfilt, nflags;
obj := arg[1];
if IsAttributeStoringRep(obj) then
extra := [];
type := TypeObj(obj);
flags := FlagsType( type);
nfilt := IS_OBJECT;
for i in [2,4..LEN_LIST(arg)-1] do
attr := arg[i];
val := arg[i+1];
if 0 <> FLAG1_FILTER(attr) then
# `attr' is a property.
if val then
nfilt:= nfilt and attr; # (implies the property tester)
else
nfilt:= nfilt and Tester( attr );
fi;
elif LEN_LIST(METHODS_OPERATION( Setter(attr) , 2)) <> 12 then
# There are special setter methods for `attr',
# we have to call the setter explicitly.
ADD_LIST(extra, attr);
ADD_LIST(extra, val);
else
# We set the attribute value.
obj!.(NAME_FUNC(attr)) := IMMUTABLE_COPY_OBJ(val);
nfilt := nfilt and Tester(attr);
fi;
od;
nflags := FLAGS_FILTER(nfilt);
if not IS_SUBSET_FLAGS(flags, nflags) then
flags := WITH_IMPS_FLAGS(AND_FLAGS(flags, nflags));
ChangeTypeObj(NEW_TYPE(TypeOfTypes,
FamilyType(type),
flags ,
DataType(type)),obj);
fi;
for i in [2,4..LEN_LIST(extra)] do
Setter(extra[i-1])(obj,extra[i]);
od;
else
extra := arg;
for i in [2,4..LEN_LIST(extra)] do
Setter(extra[i])(obj,extra[i+1]);
od;
fi;
end);
#############################################################################
##
#F ObjectifyWithAttributes(<obj>,<type>,<attr1>,<val1>,<attr2>,<val2>... )
##
## This function should have almost the same net effect as
##
## Objectify( <type>, <obj> )
## Setter( <attr1> )( <obj>, <val1> )
## Setter( <attr2> )( <obj>, <val2> )
## . . .
##
## but hopefully be faster, by amalgamating all the type changes
##
## The difference, is that type may already include the testers for
## the attributes passesd (if any of them are properties then the type
## may also include their values). In this case, no new type will
## be created at all.
##
BIND_GLOBAL( "IsAttributeStoringRepFlags",
FLAGS_FILTER( IsAttributeStoringRep ) );
BIND_GLOBAL( "INFO_OWA", Ignore );
MAKE_READ_WRITE_GLOBAL( "INFO_OWA" );
BIND_GLOBAL( "ObjectifyWithAttributes", function (arg)
local obj, type, flags, attr, val, i, extra, nflags;
obj := arg[1];
type := arg[2];
flags := FlagsType( type);
extra := [];
if not IS_SUBSET_FLAGS(
flags,
IsAttributeStoringRepFlags
) then
extra := arg{[3..LEN_LIST(arg)]};
INFO_OWA( "#W ObjectifyWithAttributes called ",
"for non-attribute storing rep\n" );
Objectify(type, obj);
else
nflags := EMPTY_FLAGS;
for i in [3,5..LEN_LIST(arg)-1] do
attr := arg[i];
val := arg[i+1];
# This first case is the case of a property
if 0 <> FLAG1_FILTER(attr) then
if val then
nflags := AND_FLAGS(nflags, FLAGS_FILTER(attr));
else
nflags := AND_FLAGS(nflags, FLAGS_FILTER(Tester(attr)));
fi;
# Now we have to check that no one has installed non-standard
# setter methods
elif LEN_LIST( METHODS_OPERATION( Setter( attr ), 2) )
<> LENGTH_SETTER_METHODS_2 then
ADD_LIST(extra, attr);
ADD_LIST(extra, val);
# Otherwise we are dealing with a normal stored attribute
# so store it in the record and set the tester
else
obj.( NAME_FUNC(attr) ) := IMMUTABLE_COPY_OBJ(val);
nflags := AND_FLAGS(nflags, FLAGS_FILTER(Tester(attr)));
fi;
od;
if not IS_SUBSET_FLAGS(flags,nflags) then
flags := WITH_IMPS_FLAGS(AND_FLAGS(flags, nflags));
Objectify( NEW_TYPE(TypeOfTypes,
FamilyType(type),
flags ,
DataType(type)), obj);
else
Objectify( type, obj);
fi;
fi;
for i in [1,3..LEN_LIST(extra)-1] do
if (Tester(extra[i])(obj)) then
INFO_OWA( "#W Supplied type has tester of ",NAME_FUNC(extra[i]),
"with non-standard setter\n" );
ResetFilterObj(obj, Tester(extra[i]));
#T If there is an immediate method relying on an attribute
#T whose tester is set to `true' in `type'
#T and that has a special setter
#T then already the `Objectify' call above may cause problems?
fi;
Setter(extra[i])(obj,extra[i+1]);
od;
end );
#############################################################################
##
#E
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