static bool_t ValidateSize(const ebml_element *p)
{
return EBML_ElementIsFiniteSize(p) && (p->DataSize == 8 || p->DataSize == 0);
}
filepos_t EBML_VoidReplaceWith(ebml_element *Void, ebml_element *ReplacedWith, stream *Output, bool_t ComeBackAfterward, bool_t bWithDefault)
{
filepos_t CurrentPosition;
assert(Node_IsPartOf(Void,EBML_VOID_CLASS));
EBML_ElementUpdateSize(ReplacedWith,bWithDefault,0);
if (EBML_ElementFullSize(Void,1) < EBML_ElementFullSize(ReplacedWith,1))
// the element can't be written here !
return INVALID_FILEPOS_T;
if (EBML_ElementFullSize(Void,1) - EBML_ElementFullSize(ReplacedWith,1) == 1)
// there is not enough space to put a filling element
return INVALID_FILEPOS_T;
CurrentPosition = Stream_Seek(Output,0,SEEK_CUR);
Stream_Seek(Output,Void->ElementPosition,SEEK_SET);
EBML_ElementRender(ReplacedWith,Output,bWithDefault,0,1,NULL);
if (EBML_ElementFullSize(Void,1) - EBML_ElementFullSize(ReplacedWith,1) > 1)
{
// fill the rest with another void element
ebml_element *aTmp = EBML_ElementCreate(Void,Void->Context,0,NULL);
if (aTmp)
{
filepos_t HeadBefore,HeadAfter;
EBML_VoidSetFullSize(aTmp, EBML_ElementFullSize(Void,1) - EBML_ElementFullSize(ReplacedWith,1));
HeadBefore = EBML_ElementFullSize(aTmp,1) - aTmp->DataSize;
aTmp->DataSize = aTmp->DataSize - EBML_CodedSizeLength(aTmp->DataSize, aTmp->SizeLength, EBML_ElementIsFiniteSize(aTmp));
HeadAfter = EBML_ElementFullSize(aTmp,1) - aTmp->DataSize;
if (HeadBefore != HeadAfter)
aTmp->SizeLength = (int8_t)(EBML_CodedSizeLength(aTmp->DataSize, aTmp->SizeLength, EBML_ElementIsFiniteSize(aTmp)) - (HeadAfter - HeadBefore));
EBML_ElementRenderHead(aTmp,Output,0,NULL);
NodeDelete((node*)aTmp);
}
}
if (ComeBackAfterward)
Stream_Seek(Output,CurrentPosition,SEEK_SET);
return EBML_ElementFullSize(Void,1);
}
