"

 COPYRIGHT (c) 1989-92 by Claus Gittinger

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

ArrayedCollection variableSubclass:#Array

       instanceVariableNames:''

       classVariableNames:''

       poolDictionaries:''

       category:'Collections-Indexed'

!

Array comment:'

COPYRIGHT (c) 1989-92 by Claus Gittinger

              All Rights Reserved

Arrays store general objects; the size is fixed, so add/remove is not

allowed. Access to the elements is via an Integer index. Since Arrays

are used very often in the system, some methods have been tuned by

reimplementation as primitive.

%W% %E%

written spring 89 by claus

'!

!Array methodsFor:'resizing'!

grow:newSize

    (newSize ~~ self size) ifTrue:[

        self fixedSizeError

    ]

! !

!Array methodsFor:'accessing'!

size

    "return the number of indexed elements in the receiver"

%{  /* NOCONTEXT */

    RETURN ( _MKSMALLINT(_arraySize(self) - _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars) ));

%}

!

at:index

    "return the indexed instance variable with index, anInteger

     - added here for speed"

%{  /* NOCONTEXT */

    REGISTER int indx;

    REGISTER int nIndex;

    if (_isSmallInteger(index)) {

        indx = _intVal(index) - 1;

	if (indx >= 0) {

            nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

            indx += _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars);

            if (indx < nIndex) {

                RETURN ( _InstPtr(self)->i_instvars[indx] );

            }

        }

    }

%}

.

    ^ super at:index

!

at:index put:anObject

    "store the 2nd arg, anObject as indexed instvar with index, anInteger.

     - added here for speed"

%{  /* NOCONTEXT */

    REGISTER int indx;

    REGISTER int nIndex;

    if (_isSmallInteger(index)) {

        indx = _intVal(index) - 1;

        if (indx >= 0) {

            nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

            indx += _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars);

            if (indx < nIndex) {

                _InstPtr(self)->i_instvars[indx] = anObject;

                __STORE(self, anObject);

                RETURN ( anObject );

            }

        }

    }

%}

.

    ^ super at:index put:anObject

! !

!Array methodsFor:'copying'!

copyWith:something

    "reimplemented for speed if receiver is an Array"

%{

    OBJ nObj;

    int mySize;

    int i, nIndex;

    OBJ *op;

    extern int newSpace;

    if (_qClass(self) == Array) {

        mySize = _qSize(self);

        _qAlignedNew(nObj, mySize + sizeof(OBJ), __context);

        _InstPtr(nObj)->o_class = Array;

	nIndex = (mySize - OHDR_SIZE) / sizeof(OBJ);

        /* created object is usually in newspace */

        if (_qSpace(nObj) == newSpace) {

            /* dont care for store */

#ifdef bcopy4

	    bcopy4(_ArrayInstPtr(self)->a_element, _ArrayInstPtr(nObj)->a_element, nIndex);

#else

            bcopy(_ArrayInstPtr(self)->a_element, _ArrayInstPtr(nObj)->a_element, mySize - OHDR_SIZE);

#endif

            _ArrayInstPtr(nObj)->a_element[nIndex] = something;

        } else {

            /* must take care of stores ... */

            op = _ArrayInstPtr(self)->a_element;

            for (i=0; i<nIndex; i++) {

                _ArrayInstPtr(nObj)->a_element[i] = *op;

               __STORE(nObj, *op);

               op++;

            }

            _ArrayInstPtr(nObj)->a_element[i] = something;

            __STORE(nObj, something);

	}

        RETURN ( nObj );

    }

%}

.

    ^ super copyWith:something

! !

!Array methodsFor:'filling & replacing'!

from:index1 to:index2 put:anObject

    "reimplemented for speed if receiver is an Array"

%{  /* NOCONTEXT */

    REGISTER int index;

    int nIndex;

    int endIndex;

    REGISTER OBJ *dst;

    if ((_qClass(self) == Array)

     && _isSmallInteger(index1)

     && _isSmallInteger(index2)) {

        index = _intVal(index1) - 1;

        if (index >= 0) {

            nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

            endIndex = _intVal(index2) - 1;

            if (endIndex < nIndex) {

                dst = &(_InstPtr(self)->i_instvars[index]);

#ifdef memset4

                memset4(dst, anObject, (endIndex-index+1));

                __STORE(self, anObject);

#else

                if ((INT)anObject == 0) {

                    memset(dst, 0, (endIndex-index+1) * sizeof(OBJ));

                } else {

                    for (; index <= endIndex; index++) {

                        *dst++ = anObject;

                    }

                    __STORE(self, anObject);

                }

#endif

                RETURN ( self );

            }

        }

    }

%}

.

    ^ super from:index1 to:index2 put:anObject

!

replaceFrom:start to:stop with:aCollection startingAt:repStart

    "reimplemented for speed if both receiver and aCollection are Arrays"

%{  /* NOCONTEXT */

    int nIndex, repNIndex;

    int startIndex, stopIndex;

    REGISTER OBJ *src;

    REGISTER OBJ *dst;

    int repStopIndex;

    REGISTER int repStartIndex;

    REGISTER OBJ t;

    REGISTER int count;

    extern int newSpace;

    if ((_qClass(self) == Array)

     && (_Class(aCollection) == Array)

     && _isSmallInteger(start)

     && _isSmallInteger(stop)

     && _isSmallInteger(repStart)) {

        startIndex = _intVal(start) - 1;

        if (startIndex >= 0) {

            nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

            stopIndex = _intVal(stop) - 1;

            count = stopIndex - startIndex + 1;

            if ((count > 0) && (stopIndex < nIndex)) {

                repStartIndex = _intVal(repStart) - 1;

                if (repStartIndex >= 0) {

                    repNIndex = (_qSize(aCollection) - OHDR_SIZE) / sizeof(OBJ);

                    repStopIndex = repStartIndex + (stopIndex - startIndex);

                    if (repStopIndex < repNIndex) {

                        src = &(_InstPtr(aCollection)->i_instvars[repStartIndex]);

                        dst = &(_InstPtr(self)->i_instvars[startIndex]);

                        if (aCollection == self) {

                            /* no need to check stores */

                            /* take care of overlapping copy */

                            if (src < dst) {

                                /* must do a reverse copy */

                                src += count;

                                dst += count;

                                while (count-- > 0) {

                                    *--dst = *--src;

                                }

                                RETURN ( self );

                            }

#ifdef bcopy4

			    bcopy4(src, dst, count);

#else

# ifdef FAST_MEMCPY

                            bcopy(src, dst, count*sizeof(OBJ));

# else

			    while (count >= 4) {

				MOVE4LONGS(src, dst);

				count -= 4;

			    }

                            while (count--) {

                                *dst++ = *src++;

                            }

# endif

#endif

                        } else {

                            /*

			     * no need for store-check, if dst is in newspace

                             */

                            if (_qSpace(self) == newSpace) {

#ifdef bcopy4

				bcopy4(src, dst, count);

#else

# ifdef FAST_MEMCPY

                                bcopy(src, dst, count*sizeof(OBJ));

# else

			        while (count >= 4) {

				    MOVE4LONGS(src, dst);

				    count -= 4;

			        }

                                while (count--) {

                                    *dst++ = *src++;

                                }

# endif

#endif

                            } else {

                                while (count-- > 0) {

                                    t = *src++;

                                    *dst++ = t;

                                    __STORE(self, t);

                                }

                            }

                        }

                        RETURN ( self );

                    }

                }

            }

        }

    }

%}

.

    ^ super replaceFrom:start to:stop with:aCollection startingAt:repStart

! !

!Array methodsFor:'testing'!

includes:anObject

    "return true, if the argument, anObject is contained in the array

     - reimplemented for speed"

    |element|

%{  /* NOCONTEXT */

    REGISTER int index;

    REGISTER OBJ o;

    int nIndex;

    nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

    index = _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars);

    /* quick check using == */

    o = anObject;

    while (index < nIndex) {

        if (_InstPtr(self)->i_instvars[index++] == o) {

            RETURN ( true );

	}

    }

    if (o == nil) {

	RETURN ( false );

    }

%}

.

%{

    REGISTER int index;

    int nIndex;

    extern OBJ __eq;

    static struct inlineCache eq = _ILC1;

    nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

    index = _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars);

    /* slow check using = */

    while (index < nIndex) {

        element = _InstPtr(self)->i_instvars[index++];

	if (element != nil) {

#ifdef PASS_ARG_REF

            if ((*eq.ilc_func)(anObject,__eq, CON_COMMA nil,&eq,&element)==true)

#else

            if ((*eq.ilc_func)(anObject,__eq, CON_COMMA nil,&eq,element)==true)

#endif

	    {

                RETURN ( true );

	    }

	}

    }

%}

.

    ^ false

!

indexOf:anElement startingAt:start

    "search the array for anElement; return index if found, 0 otherwise

     - reimplemented for speed"

    |element|

%{

    REGISTER int index;

    int nIndex, nInsts;

    extern OBJ __eq;

    static struct inlineCache eq = _ILC1;

    if (_isSmallInteger(start)) {

        index = _intVal(start) - 1;

        if (index >= 0) {

            nInsts = _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars);

            index += nInsts;

            nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

	    if (anElement != nil) {

                while (index < nIndex) {

                    element = _InstPtr(self)->i_instvars[index++];

		    if (element != nil) {

                        if ((element == anElement) 

#ifdef PASS_ARG_REF

                         || ((*eq.ilc_func)(anElement,__eq, CON_COMMA nil,&eq,&element)

#else

                         || ((*eq.ilc_func)(anElement,__eq, CON_COMMA nil,&eq,element)

#endif

                                                                            == true)) {

                            RETURN ( _MKSMALLINT(index - nInsts) );

                        }

                    }

                }

	    } else {

		/* search for nil */

                while (index < nIndex) {

                    if (_InstPtr(self)->i_instvars[index++] == nil) {

                        RETURN ( _MKSMALLINT(index - nInsts) );

                    }

                }

            }

        }

    }

%}

.

    ^ 0

!

identityIndexOf:anElement startingAt:start

    "search the array for anElement; return index if found, 0 otherwise

     - reimplemented for speed"

%{  /* NOCONTEXT */

    REGISTER int index;

    REGISTER OBJ el;

    REGISTER OBJ *op;

    REGISTER int nIndex;

    int nInsts;

    if (_isSmallInteger(start)) {

        index = _intVal(start) - 1;

        if (index >= 0) {

            nInsts = _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars);

            index += nInsts;

            nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

            el = anElement;

            op = & (_InstPtr(self)->i_instvars[index]);

            while (index++ < nIndex) {

                if (*op++ == el) {

                    RETURN ( _MKSMALLINT(index - nInsts) );

                }

            }

	    RETURN ( _MKSMALLINT(0) );

        }

    }

%}

.

    ^ super identityIndexOf:anElement startingAt:start

! !

!Array methodsFor:'enumeration'!

do:aBlock

    "evaluate the argument, aBlock for each element in the collection.

     - reimplemented for speed"

    |home element|

%{

    REGISTER OBJFUNC codeVal;

    REGISTER int index;

    int nIndex;

    extern OBJ _value_, Block;

    static struct inlineCache val = _ILC1;

    index = _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars);

    nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

    if (_isBlock(aBlock)

     && ((codeVal = _BlockInstPtr(aBlock)->b_code) != (OBJFUNC)nil)

     && (_BlockInstPtr(aBlock)->b_nargs == _MKSMALLINT(1))) {

        home = _BlockInstPtr(aBlock)->b_home;

        for (; index < nIndex; index++) {

	    if (InterruptPending != nil) interruptL(__LINE__ COMMA_CON);

            element = _InstPtr(self)->i_instvars[index];

#ifdef PASS_ARG_REF

            (*codeVal)(home, CON_COMMA  &element);

#else

            (*codeVal)(home, CON_COMMA  element);

#endif

        } 

    } else {

        for (; index < nIndex; index++) {

	    if (InterruptPending != nil) interruptL(__LINE__ COMMA_CON);

            element = _InstPtr(self)->i_instvars[index];

#ifdef PASS_ARG_REF

            (*val.ilc_func)(aBlock, _value_, CON_COMMA  nil, &val, &element);

#else

            (*val.ilc_func)(aBlock, _value_, CON_COMMA  nil, &val, element);

#endif

        } 

    }

%}

.

    ^ self

!

reverseDo:aBlock

    "evaluate the argument, aBlock for each element in the collection in reverse order.

     - reimplemented for speed"

    |home element|

%{

    REGISTER OBJFUNC codeVal;

    REGISTER int index;

    int nIndex, endIndex;

    extern OBJ _value_, Block;

    static struct inlineCache val = _ILC1;

    endIndex = _intVal(_ClassInstPtr(_qClass(self))->c_ninstvars);

    nIndex = (_qSize(self) - OHDR_SIZE) / sizeof(OBJ);

    if (_isBlock(aBlock)

     && ((codeVal = _BlockInstPtr(aBlock)->b_code) != (OBJFUNC)nil)

     && (_BlockInstPtr(aBlock)->b_nargs == _MKSMALLINT(1))) {

        home = _BlockInstPtr(aBlock)->b_home;

        for (index=nIndex-1; index >= endIndex; index--) {

	    if (InterruptPending != nil) interruptL(__LINE__ COMMA_CON);

            element = _InstPtr(self)->i_instvars[index];

#ifdef PASS_ARG_REF

            (*codeVal)(home, CON_COMMA  &element);

#else

            (*codeVal)(home, CON_COMMA  element);

#endif

        } 

    } else {

        for (index=nIndex=1; index >= endIndex; index--) {

	    if (InterruptPending != nil) interruptL(__LINE__ COMMA_CON);

            element = _InstPtr(self)->i_instvars[index];

#ifdef PASS_ARG_REF

            (*val.ilc_func)(aBlock, _value_, CON_COMMA  nil, &val, &element);

#else

            (*val.ilc_func)(aBlock, _value_, CON_COMMA  nil, &val, element);

#endif

        } 

    }

%}

.

    ^ self

!

from:start to:stop do:aBlock

    "evaluate the argument, aBlock for the elements starting at index start

     up to (and including) stop in the collection.

     - reimplemented for speed"

    |home element|

%{

    REGISTER OBJFUNC codeVal;

    REGISTER int index;

    int nIndex, nInsts;