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|
{
This file is part of the Free Pascal run time library.
Copyright (c) 2000 by Florian Klaempfl
member of the Free Pascal development team.
This file implements the helper routines for dyn. Arrays in FPC
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************
}
type
{ don't add new fields, the size is used }
{ to calculate memory requirements }
pdynarray = ^tdynarray;
tdynarray = packed record
refcount : ptrint;
high : tdynarrayindex;
end;
pdynarraytypedata = ^tdynarraytypedata;
tdynarraytypedata =
{$ifndef FPC_REQUIRES_PROPER_ALIGNMENT}
packed
{$else}
{$ifdef powerpc64}
{ 3.0.0 does not align elType field on a 8-byte boundary,
thus use packed also in this case }
{$ifdef VER3_0_0}
packed
{$endif VER3_0_0}
{$endif powerpc64}
{$endif FPC_REQUIRES_PROPER_ALIGNMENT}
record
elSize : SizeUInt;
{$ifdef VER3_0}
elType2 : Pointer;
{$else}
elType2 : PPointer;
{$endif}
varType : Longint;
{$ifdef VER3_0}
elType : Pointer;
{$else}
elType : PPointer;
{$endif}
end;
procedure fpc_dynarray_rangecheck(p : pointer;i : tdynarrayindex);[Public,Alias:'FPC_DYNARRAY_RANGECHECK']; compilerproc;
begin
if not(assigned(p)) or (i<0) or (i>pdynarray(p-sizeof(tdynarray))^.high) then
HandleErrorAddrFrameInd(201,get_pc_addr,get_frame);
end;
function fpc_dynarray_length(p : pointer) : tdynarrayindex;[Public,Alias:'FPC_DYNARRAY_LENGTH']; compilerproc;
begin
if assigned(p) then
fpc_dynarray_length:=pdynarray(p-sizeof(tdynarray))^.high+1
else
fpc_dynarray_length:=0;
end;
function fpc_dynarray_high(p : pointer) : tdynarrayindex;[Public,Alias:'FPC_DYNARRAY_HIGH']; compilerproc;
begin
if assigned(p) then
fpc_dynarray_high:=pdynarray(p-sizeof(tdynarray))^.high
else
fpc_dynarray_high:=-1;
end;
procedure fpc_dynarray_clear(var p : pointer;ti : pointer); [Public,Alias:'FPC_DYNARRAY_CLEAR']; compilerproc;
var
realp : pdynarray;
begin
if (P=Nil) then
exit;
realp:=pdynarray(p-sizeof(tdynarray));
if realp^.refcount=0 then
HandleErrorAddrFrameInd(204,get_pc_addr,get_frame);
if (realp^.refcount>0) and declocked(realp^.refcount) then
begin
{$ifdef VER3_0}
ti:=aligntoptr(ti+2+PByte(ti)[1]);
{$else VER3_0}
ti:=aligntoqword(ti+2+PByte(ti)[1]);
{$endif VER3_0}
if assigned(pdynarraytypedata(ti)^.elType) then
int_finalizearray(p,pdynarraytypedata(ti)^.elType{$ifndef VER3_0}^{$endif},realp^.high+1);
freemem(realp);
end;
p:=nil;
end;
{ alias for internal use }
Procedure fpc_dynarray_clear (var p : pointer;ti : pointer);[external name 'FPC_DYNARRAY_CLEAR'];
procedure fpc_dynarray_incr_ref(p : pointer);[Public,Alias:'FPC_DYNARRAY_INCR_REF']; compilerproc;
var
realp : pdynarray;
begin
if p=nil then
exit;
realp:=pdynarray(p-sizeof(tdynarray));
if realp^.refcount=0 then
HandleErrorAddrFrameInd(204,get_pc_addr,get_frame)
else if realp^.refcount>0 then
inclocked(realp^.refcount);
end;
{ provide local access to dynarr_decr_ref for dynarr_setlength }
procedure fpc_dynarray_incr_ref(p : pointer); [external name 'FPC_DYNARRAY_INCR_REF'];
procedure fpc_dynarray_assign(var dest: Pointer; src: Pointer; ti: pointer);[public,alias:'FPC_DYNARRAY_ASSIGN']; compilerproc;
begin
fpc_dynarray_incr_ref(src);
fpc_dynarray_clear(dest,ti);
Dest:=Src;
end;
procedure fpc_dynarray_assign(var dest: Pointer; src: Pointer; ti: pointer);[external name 'FPC_DYNARRAY_ASSIGN'];
{ provide local access to dynarr_setlength }
procedure int_dynarray_setlength(var p : pointer;pti : pointer;
dimcount : sizeint;dims : pdynarrayindex);[external name 'FPC_DYNARR_SETLENGTH'];
procedure fpc_dynarray_setlength(var p : pointer;pti : pointer;
dimcount : sizeint;dims : pdynarrayindex);[Public,Alias:'FPC_DYNARR_SETLENGTH']; compilerproc;
var
i : tdynarrayindex;
movelen,
size : sizeint;
{ contains the "fixed" pointers where the refcount }
{ and high are at positive offsets }
realp,newp : pdynarray;
ti : pointer;
updatep: boolean;
elesize : sizeint;
eletype,eletypemngd : pointer;
movsize : sizeint;
begin
{ negative length is not allowed }
if dims[0]<0 then
HandleErrorAddrFrameInd(201,get_pc_addr,get_frame);
{ skip kind and name }
{$ifdef VER3_0}
ti:=aligntoptr(Pointer(pti)+2+PByte(pti)[1]);
{$else VER3_0}
ti:=aligntoqword(Pointer(pti)+2+PByte(pti)[1]);
{$endif VER3_0}
elesize:=pdynarraytypedata(ti)^.elSize;
{$ifdef VER3_0}
eletype:=pdynarraytypedata(ti)^.elType2;
{$else}
eletype:=pdynarraytypedata(ti)^.elType2^;
{$endif}
{ only set if type needs finalization }
{$ifdef VER3_0}
eletypemngd:=pdynarraytypedata(ti)^.elType;
{$else}
if assigned(pdynarraytypedata(ti)^.elType) then
eletypemngd:=pdynarraytypedata(ti)^.elType^
else
eletypemngd:=nil;
{$endif}
{ determine new memory size }
size:=elesize*dims[0]+sizeof(tdynarray);
updatep := false;
{ not assigned yet? }
if not(assigned(p)) then
begin
{ do we have to allocate memory? }
if dims[0] = 0 then
exit;
getmem(newp,size);
fillchar(newp^,size,0);
{$ifndef VER3_0}
{ call int_InitializeArray for management operators }
if assigned(eletypemngd) and (PTypeKind(eletype)^ in [tkRecord, tkObject]) then
int_InitializeArray(pointer(newp)+sizeof(tdynarray), eletype, dims[0]);
{$endif VER3_0}
updatep := true;
end
else
begin
{ if the new dimension is 0, we've to release all data }
if dims[0]=0 then
begin
fpc_dynarray_clear(p,pti);
exit;
end;
realp:=pdynarray(p-sizeof(tdynarray));
newp := realp;
if realp^.refcount<>1 then
begin
updatep := true;
{ make an unique copy }
getmem(newp,size);
fillchar(newp^,sizeof(tdynarray),0);
if realp^.high < dims[0] then
movelen := realp^.high+1
else
movelen := dims[0];
movsize := elesize*movelen;
move(p^,(pointer(newp)+sizeof(tdynarray))^, movsize);
if size-sizeof(tdynarray)>movsize then
fillchar((pointer(newp)+sizeof(tdynarray)+movsize)^,size-sizeof(tdynarray)-movsize,0);
{ increment ref. count of managed members }
if assigned(eletypemngd) then
for i:= 0 to movelen-1 do
int_addref(pointer(newp)+sizeof(tdynarray)+elesize*i,eletypemngd);
{ a declock(ref. count) isn't enough here }
{ it could be that the in MT environments }
{ in the mean time the refcount was }
{ decremented }
{ it is, because it doesn't really matter }
{ if the array is now removed }
fpc_dynarray_clear(p,pti);
end
else if dims[0]<>realp^.high+1 then
begin
{ range checking is quite difficult ... }
{ if size overflows then it is less than }
{ the values it was calculated from }
if (size<sizeof(tdynarray)) or
((elesize>0) and (size<elesize)) then
HandleErrorAddrFrameInd(201,get_pc_addr,get_frame);
{ resize? }
{ here, realp^.refcount has to be one, otherwise the previous }
{ if-statement would have been taken. Or is this also for MT }
{ code? (JM) }
if realp^.refcount=1 then
begin
{ shrink the array? }
if dims[0]<realp^.high+1 then
begin
if assigned(eletypemngd) then
int_finalizearray(pointer(realp)+sizeof(tdynarray)+
elesize*dims[0],
eletypemngd,realp^.high-dims[0]+1);
reallocmem(realp,size);
end
else if dims[0]>realp^.high+1 then
begin
reallocmem(realp,size);
fillchar((pointer(realp)+sizeof(tdynarray)+elesize*(realp^.high+1))^,
(dims[0]-realp^.high-1)*elesize,0);
{$ifndef VER3_0}
{ call int_InitializeArray for management operators }
if assigned(eletypemngd) and (PTypeKind(eletype)^ in [tkRecord, tkObject]) then
int_InitializeArray(pointer(realp)+sizeof(tdynarray)+elesize*(realp^.high+1),
eletype, dims[0]-realp^.high-1);
{$endif VER3_0}
end;
newp := realp;
updatep := true;
end;
end;
end;
{ handle nested arrays }
if dimcount>1 then
begin
for i:=0 to dims[0]-1 do
int_dynarray_setlength(pointer((pointer(newp)+sizeof(tdynarray)+i*elesize)^),
eletype,dimcount-1,@dims[1]);
end;
if updatep then
begin
p:=pointer(newp)+sizeof(tdynarray);
newp^.refcount:=1;
newp^.high:=dims[0]-1;
end;
end;
{ provide local access to dynarr_copy }
function int_dynarray_copy(psrc : pointer;ti : pointer;
lowidx,count:tdynarrayindex) : fpc_stub_dynarray;[external name 'FPC_DYNARR_COPY'];
function fpc_dynarray_copy(psrc : pointer;ti : pointer;
lowidx,count:tdynarrayindex) : fpc_stub_dynarray;[Public,Alias:'FPC_DYNARR_COPY'];compilerproc;
var
realpsrc : pdynarray;
i,size : sizeint;
elesize : sizeint;
eletype : pointer;
begin
fpc_dynarray_clear(pointer(result),ti);
if psrc=nil then
exit;
{$ifndef FPC_DYNARRAYCOPY_FIXED}
if (lowidx=-1) and (count=-1) then
begin
lowidx:=0;
count:=high(tdynarrayindex);
end;
{$endif FPC_DYNARRAYCOPY_FIXED}
realpsrc:=pdynarray(psrc-sizeof(tdynarray));
if (lowidx<0) then
begin
{ Decrease count if index is negative, this is different from how copy()
works on strings. Checked against D7. }
if count<=0 then
exit; { may overflow when adding lowidx }
count:=count+lowidx;
lowidx:=0;
end;
if (count>realpsrc^.high-lowidx+1) then
count:=realpsrc^.high-lowidx+1;
if count<=0 then
exit;
{ skip kind and name }
{$ifdef VER3_0}
ti:=aligntoptr(ti+2+PByte(ti)[1]);
{$else VER3_0}
ti:=aligntoqword(ti+2+PByte(ti)[1]);
{$endif VER3_0}
elesize:=pdynarraytypedata(ti)^.elSize;
{ only set if type needs finalization }
{$ifdef VER3_0}
eletype:=pdynarraytypedata(ti)^.elType;
{$else}
if assigned(pdynarraytypedata(ti)^.elType) then
eletype:=pdynarraytypedata(ti)^.elType^
else
eletype:=nil;
{$endif}
{ create new array }
size:=elesize*count;
getmem(pointer(result),size+sizeof(tdynarray));
pdynarray(result)^.refcount:=1;
pdynarray(result)^.high:=count-1;
inc(pointer(result),sizeof(tdynarray));
{ copy data }
move(pointer(psrc+elesize*lowidx)^,pointer(result)^,size);
{ increment ref. count of members? }
if assigned(eletype) then
for i:=0 to count-1 do
int_addref(pointer(pointer(result)+elesize*i),eletype);
end;
{$ifndef VER3_0}
procedure fpc_dynarray_delete(var p : pointer;source,count : SizeInt;pti : pointer);
var
newhigh,
i : tdynarrayindex;
size : sizeint;
{ contains the "fixed" pointers where the refcount }
{ and high are at positive offsets }
realp,newp : pdynarray;
ti : pointer;
elesize : sizeint;
eletype,eletypemngd : pointer;
begin
{ if source > high then nothing to do }
if not assigned(p) or
(source>pdynarray(p-sizeof(tdynarray))^.high) or
(count<=0) or
(source<0) then
exit;
{ cap count }
if source+count-1>pdynarray(p-sizeof(tdynarray))^.high then
count:=pdynarray(p-sizeof(tdynarray))^.high-source+1;
{ fast path: delete whole array }
if (source=0) and (count=pdynarray(p-sizeof(tdynarray))^.high+1) then
begin
fpc_dynarray_clear(p,pti);
exit;
end;
{ skip kind and name }
ti:=aligntoqword(Pointer(pti)+2+PByte(pti)[1]);
elesize:=pdynarraytypedata(ti)^.elSize;
eletype:=pdynarraytypedata(ti)^.elType2^;
{ only set if type needs finalization }
if assigned(pdynarraytypedata(ti)^.elType) then
eletypemngd:=pdynarraytypedata(ti)^.elType^
else
eletypemngd:=nil;
realp:=pdynarray(p-sizeof(tdynarray));
newp:=realp;
{ determine new memory size }
newhigh:=realp^.high-count;
size:=elesize*(newhigh+1)+sizeof(tdynarray);
if realp^.refcount<>1 then
begin
{ make an unique copy }
getmem(newp,size);
fillchar(newp^,sizeof(tdynarray),0);
{ copy the elements that we still need }
if source>0 then
move(p^,(pointer(newp)+sizeof(tdynarray))^,source*elesize);
if source+count-1<realp^.high then
move((p+(source+count)*elesize)^,(pointer(newp)+sizeof(tdynarray)+source*elesize)^,(realp^.high-(source+count)+1)*elesize);
{ increment ref. count of managed members }
if assigned(eletypemngd) then
for i:=0 to newhigh do
int_addref(pointer(newp)+sizeof(tdynarray)+elesize*i,eletypemngd);
{ a declock(ref. count) isn't enough here }
{ it could be that the in MT environments }
{ in the mean time the refcount was }
{ decremented }
{ it is, because it doesn't really matter }
{ if the array is now removed }
fpc_dynarray_clear(p,pti);
end
else
begin
{ finalize the elements that will be removed }
if assigned(eletypemngd) then
begin
for i:=source to source+count-1 do
int_finalize(p+i*elesize,eletype);
end;
{ close the gap by moving the trailing elements to the front }
move((p+(source+count)*elesize)^,(p+source*elesize)^,(realp^.high-(source+count)+1)*elesize);
{ resize the array }
reallocmem(realp,size);
newp:=realp;
end;
p:=pointer(newp)+sizeof(tdynarray);
newp^.refcount:=1;
newp^.high:=newhigh;
end;
procedure fpc_dynarray_insert(var p : pointer;source : SizeInt;data : pointer;count : SizeInt;pti : pointer);compilerproc;
var
newhigh,
i : tdynarrayindex;
size : sizeint;
realp,
newp : pdynarray;
ti : pointer;
elesize : sizeint;
eletype,eletypemngd : pointer;
begin
if not assigned(data) or
(count=0) then
exit;
if assigned(p) then
realp:=pdynarray(p-sizeof(tdynarray))
else
realp:=nil;
newp:=realp;
{ cap insert index }
if assigned(p) then
begin
if source<0 then
source:=0
else if source>realp^.high+1 then
source:=realp^.high+1;
end
else
source:=0;
{ skip kind and name }
ti:=aligntoqword(Pointer(pti)+2+PByte(pti)[1]);
elesize:=pdynarraytypedata(ti)^.elSize;
eletype:=pdynarraytypedata(ti)^.elType2^;
{ only set if type needs initialization }
if assigned(pdynarraytypedata(ti)^.elType) then
eletypemngd:=pdynarraytypedata(ti)^.elType^
else
eletypemngd:=nil;
{ determine new memory size }
if assigned(p) then
newhigh:=realp^.high+count
else
newhigh:=count-1;
size:=elesize*(newhigh+1)+sizeof(tdynarray);
if assigned(p) then
begin
if realp^.refcount<>1 then
begin
{ make an unique copy }
getmem(newp,size);
fillchar(newp^,sizeof(tdynarray),0);
{ copy leading elements }
if source>0 then
move(p^,(pointer(newp)+sizeof(tdynarray))^,source*elesize);
{ insert new elements }
move(data^,(pointer(newp)+sizeof(tdynarray)+source*elesize)^,count*elesize);
{ copy trailing elements }
if realp^.high-source+1>0 then
move((p+source*elesize)^,(pointer(newp)+sizeof(tdynarray)+(source+count)*elesize)^,(realp^.high-source+1)*elesize);
{ increment ref. count of managed members }
if assigned(eletypemngd) then
for i:=0 to newhigh do
int_addref(pointer(newp)+sizeof(tdynarray)+elesize*i,eletypemngd);
{ a declock(ref. count) isn't enough here }
{ it could be that the in MT environments }
{ in the mean time the refcount was }
{ decremented }
{ it is, because it doesn't really matter }
{ if the array is now removed }
fpc_dynarray_clear(p,pti);
end
else
begin
{ resize the array }
reallocmem(realp,size);
{ p might no longer be correct }
p:=pointer(realp)+sizeof(tdynarray);
{ move the trailing part after the inserted data }
if source<=realp^.high then
move((p+source*elesize)^,(p+(source+count)*elesize)^,(realp^.high-source+1)*elesize);
{ move the inserted data to the destination }
move(data^,(p+source*elesize)^,count*elesize);
{ increase reference counts of inserted elements }
if assigned(eletypemngd) then
begin
for i:=source to source+count-1 do
int_addref(p+i*elesize,eletypemngd);
end;
newp:=realp;
end;
end
else
begin
{ allocate new array }
getmem(newp,size);
fillchar(newp^,sizeof(tdynarray),0);
{ insert data }
move(data^,(pointer(newp)+sizeof(tdynarray))^,count*elesize);
{ increase reference counts of inserted elements }
if assigned(eletypemngd) then
begin
for i:=0 to count-1 do
int_addref(pointer(newp)+sizeof(tdynarray)+i*elesize,eletypemngd);
end;
end;
p:=pointer(newp)+sizeof(tdynarray);
newp^.refcount:=1;
newp^.high:=newhigh;
end;
procedure fpc_dynarray_concat_multi(var dest : pointer; pti: pointer; const sarr:array of pointer); compilerproc;
var
i,
offset,
totallen : sizeint;
newp,
realp,
srealp : pdynarray;
ti : pointer;
elesize : sizeint;
eletypemngd : pointer;
begin
{ sanity check }
if length(sarr)=0 then
exit;
totallen:=0;
for i:=0 to high(sarr) do
if assigned(sarr[i]) then
inc(totallen,pdynarray(sarr[i]-sizeof(tdynarray))^.high+1);
if totallen=0 then
begin
fpc_dynarray_clear(dest,pti);
exit;
end;
{ skip kind and name }
ti:=aligntoqword(Pointer(pti)+2+PByte(pti)[1]);
elesize:=pdynarraytypedata(ti)^.elSize;
{ only set if type needs initialization }
if assigned(pdynarraytypedata(ti)^.elType) then
eletypemngd:=pdynarraytypedata(ti)^.elType^
else
eletypemngd:=nil;
{ copy the elements of each source array }
offset:=0;
{ the idea to reuse the first array, re-allocate it and append the other entries is not possible as the first entry
might be finalized later on by the caller however in case of a re-allocate, the entry itself might be gone }
{ allocate new array }
getmem(newp,totallen*elesize+sizeof(tdynarray));
for i:=0 to high(sarr) do
if assigned(sarr[i]) then
begin
srealp:=pdynarray(sarr[i]-sizeof(tdynarray));
if srealp^.high>=0 then
begin
move(sarr[i]^,(pointer(newp)+sizeof(tdynarray)+offset*elesize)^,(srealp^.high+1)*elesize);
inc(offset,srealp^.high+1);
end;
end;
{ increase reference counts of all the elements }
if assigned(eletypemngd) then
begin
for i:=0 to totallen-1 do
int_addref(pointer(newp)+sizeof(tdynarray)+i*elesize,eletypemngd);
end;
{ clear at the end, dest could be a reference to an array being used also as source }
fpc_dynarray_clear(dest,pti);
dest:=pointer(newp)+sizeof(tdynarray);
newp^.refcount:=1;
newp^.high:=totallen-1;
end;
procedure fpc_dynarray_concat(var dest : pointer; pti: pointer; const src1,src2 : pointer); compilerproc;
var
i,
offset,
totallen : sizeint;
newp,
realp,
srealp : pdynarray;
ti : pointer;
elesize : sizeint;
eletypemngd : pointer;
begin
totallen:=0;
if assigned(src1) then
inc(totallen,pdynarray(src1-sizeof(tdynarray))^.high+1);
if assigned(src2) then
inc(totallen,pdynarray(src2-sizeof(tdynarray))^.high+1);
if totallen=0 then
begin
fpc_dynarray_clear(dest,pti);
exit;
end;
{ skip kind and name }
ti:=aligntoqword(Pointer(pti)+2+PByte(pti)[1]);
elesize:=pdynarraytypedata(ti)^.elSize;
{ only set if type needs initialization }
if assigned(pdynarraytypedata(ti)^.elType) then
eletypemngd:=pdynarraytypedata(ti)^.elType^
else
eletypemngd:=nil;
{ the idea to reuse the first array, re-allocate it and append the other entries is not possible as the first entry
might be finalized later on by the caller however in case of a re-allocate, the entry itself might be gone }
{ allocate new array }
getmem(newp,totallen*elesize+sizeof(tdynarray));
{ copy the elements of each source array }
offset:=0;
if assigned(src1) then
begin
srealp:=pdynarray(src1-sizeof(tdynarray));
if srealp^.high>=0 then
begin
move(src1^,(pointer(newp)+sizeof(tdynarray)+offset*elesize)^,(srealp^.high+1)*elesize);
inc(offset,srealp^.high+1);
end;
end;
if assigned(src2) then
begin
srealp:=pdynarray(src2-sizeof(tdynarray));
if srealp^.high>=0 then
move(src2^,(pointer(newp)+sizeof(tdynarray)+offset*elesize)^,(srealp^.high+1)*elesize);
end;
{ increase reference counts of all the elements }
if assigned(eletypemngd) then
begin
for i:=0 to totallen-1 do
int_addref(pointer(newp)+sizeof(tdynarray)+i*elesize,eletypemngd);
end;
{ clear at the end, dest could be a reference to an array being also source }
fpc_dynarray_clear(dest,pti);
dest:=pointer(newp)+sizeof(tdynarray);
newp^.refcount:=1;
newp^.high:=totallen-1;
end;
{$endif VER3_0}
procedure DynArraySetLength(var a: Pointer; typeInfo: Pointer; dimCnt: SizeInt; lengthVec: PSizeInt);
external name 'FPC_DYNARR_SETLENGTH';
function DynArraySize(a : pointer): tdynarrayindex;
external name 'FPC_DYNARRAY_LENGTH';
procedure DynArrayClear(var a: Pointer; typeInfo: Pointer);
external name 'FPC_DYNARRAY_CLEAR';
function DynArrayDim(typeInfo: Pointer): Integer;
begin
result:=0;
while (typeInfo <> nil) and (pdynarraytypeinfo(typeInfo)^.kind = tkDynArray) do
begin
{ skip kind and name }
{$ifdef VER3_0}
typeInfo:=aligntoptr(typeInfo+2+PByte(typeInfo)[1]);
{$else VER3_0}
typeInfo:=aligntoqword(typeInfo+2+PByte(typeInfo)[1]);
{$endif VER3_0}
{ element type info}
{$ifdef VER3_0}
typeInfo:=pdynarraytypedata(typeInfo)^.elType2;
{$else VER3_0}
typeInfo:=pdynarraytypedata(typeInfo)^.elType2^;
{$endif VER3_0}
Inc(result);
end;
end;
function DynArrayBounds(a: Pointer; typeInfo: Pointer): TBoundArray;
var
i,dim: sizeint;
begin
dim:=DynArrayDim(typeInfo);
SetLength(result, dim);
for i:=0 to pred(dim) do
if a = nil then
exit
else
begin
result[i]:=DynArraySize(a)-1;
a:=PPointerArray(a)^[0];
end;
end;
function IsDynArrayRectangular(a: Pointer; typeInfo: Pointer): Boolean;
var
i,j: sizeint;
dim,count: sizeint;
begin
dim:=DynArrayDim(typeInfo);
for i:=1 to pred(dim) do
begin
count:=DynArraySize(PPointerArray(a)^[0]);
for j:=1 to Pred(DynArraySize(a)) do
if count<>DynArraySize(PPointerArray(a)^[j]) then
exit(false);
a:=PPointerArray(a)^[0];
end;
result:=true;
end;
function DynArrayIndex(a: Pointer; const indices: array of SizeInt; typeInfo: Pointer): Pointer;
var
i,h: sizeint;
elsize: sizeuint;
begin
h:=High(indices);
for i:=0 to h do
begin
if i<h then
a := PPointerArray(a)^[indices[i]];
{ skip kind and name }
{$ifdef VER3_0}
typeInfo:=aligntoptr(typeInfo+2+PByte(typeInfo)[1]);
{$else VER3_0}
typeInfo:=aligntoqword(typeInfo+2+PByte(typeInfo)[1]);
{$endif VER3_0}
{ store the last element size for the index calculation }
elsize:=pdynarraytypedata(typeInfo)^.elSize;
{ element type info}
{$ifdef VER3_0}
typeInfo:=pdynarraytypedata(typeInfo)^.elType2;
{$else VER3_0}
typeInfo:=pdynarraytypedata(typeInfo)^.elType2^;
{$endif VER3_0}
if typeInfo=nil then
exit(nil);
end;
result:=@(PByte(a)[indices[h]*elsize]);
end;
{ obsolete but needed for bootstrapping }
procedure fpc_dynarray_decr_ref(var p : pointer;ti : pointer); [Public,Alias:'FPC_DYNARRAY_DECR_REF']; compilerproc;
begin
fpc_dynarray_clear(p,ti);
end;
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