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Segmentation: setup for simple demo test case works

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due to having extracted the Algo implementation as template,
we can now instantiate it for isolated tests with simple integer intervals
This commit is contained in:
Fischlurch 2023-05-04 02:07:38 +02:00
parent 00ca84a2aa
commit f9a4d6134c
3 changed files with 139 additions and 63 deletions
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87
src/lib/split-splice.hpp
View file

@ -79,22 +79,6 @@ namespace lib {
class Algo
: util::NonCopyable
{
enum Verb { NIL
, DROP
, TRUNC
, INS_NOP
, SEAMLESS
};
Verb opPred_ = NIL,
opSucc_ = NIL;
POS pred_, succ_;
ORD start_, after_;
using OptORD = std::optional<ORD>;
/* ======= elementary operations ======= */
ASSERT_VALID_SIGNATURE (START, ORD(POS))
@ -111,8 +95,30 @@ namespace lib {
CLONE cloneSeg;
DELETE discard;
using OptORD = std::optional<ORD>;
const ORD AXIS_END;
/* ======= working state ======= */
POS pred_, succ_;
struct SegBounds
{ // can be assigned in one step (ORD may be immutable)
ORD start,
after;
} b_;
enum Verb { NIL
, DROP
, TRUNC
, INS_NOP
, SEAMLESS
};
Verb opPred_ = NIL,
opSucc_ = NIL;
public:
/**
* @param startAll (forward) iterator pointing at the overall Segmentation begin
@ -136,15 +142,16 @@ namespace lib {
, cloneSeg{fun_cloneSeg}
, discard {fun_discard}
, AXIS_END{axisEnd}
, pred_{}
, succ_{}
, b_{establishSplitPoint (startAll,afterAll, start,after)}
{
auto [start_,after_] = establishSplitPoint (startAll,afterAll, start,after);
// Postcondition: ordered start and end times
ENSURE (pred_ != afterAll);
ENSURE (succ_ != afterAll);
ENSURE (start_ < after_);
ENSURE (getStart(pred_) <= start_);
ENSURE (start_ <= getStart(succ_) or pred_ == succ_);
ENSURE (b_.start < b_.after);
ENSURE (getStart(pred_) <= b_.start);
ENSURE (b_.start <= getStart(succ_) or pred_ == succ_);
}
/**
@ -152,7 +159,7 @@ namespace lib {
* and establish the actual start and end point of the new segment
* @return
*/
std::pair<ORD,ORD>
SegBounds
establishSplitPoint (POS startAll, POS afterAll
,OptORD start, OptORD after)
{ // nominal break point
@ -197,15 +204,15 @@ namespace lib {
ORD startPred = getStart (pred_),
afterPred = getAfter (pred_);
if (startPred < start_)
if (startPred < b_.start)
{
if (afterPred < start_) opPred_ = INS_NOP;
if (afterPred < b_.start) opPred_ = INS_NOP;
else
if (afterPred == start_) opPred_ = SEAMLESS;
if (afterPred == b_.start) opPred_ = SEAMLESS;
else
{
opPred_ = TRUNC;
if (afterPred > after_)
if (afterPred > b_.after)
{ // predecessor actually spans the new segment
// thus use it also as successor and truncate both (=SPLIT)
succ_ = pred_;
@ -214,9 +221,9 @@ namespace lib {
} } }
else
{
REQUIRE (startPred == start_, "predecessor does not precede start point");
REQUIRE (startPred == b_.start, "predecessor does not precede start point");
opPred_ = DROP;
if (after_ < afterPred )
if (b_.after < afterPred )
{ // predecessor coincides with start of new segment
// thus use it rather as successor and truncate at start
succ_ = pred_;
@ -225,21 +232,21 @@ namespace lib {
} }
ORD startSucc = getStart (succ_);
if (startSucc < after_)
if (startSucc < b_.after)
{
while (getAfter(succ_) < after_)
while (getAfter(succ_) < b_.after)
++succ_;
ASSERT (getStart(succ_) < after_ // in case we dropped a successor completely spanned,
ASSERT (getStart(succ_) < b_.after // in case we dropped a successor completely spanned,
,"seamless segmentation"); // even the next one must start within the new segment
if (after_ == getAfter(succ_)) opSucc_ = DROP;
if (b_.after == getAfter(succ_)) opSucc_ = DROP;
else
if (after_ < getAfter(succ_)) opSucc_ = TRUNC;
if (b_.after < getAfter(succ_)) opSucc_ = TRUNC;
}
else
{
if (after_ == startSucc) opSucc_ = SEAMLESS;
else opSucc_ = INS_NOP;
if (b_.after == startSucc) opSucc_ = SEAMLESS;
else opSucc_ = INS_NOP;
}
}
@ -265,22 +272,22 @@ namespace lib {
++succ_;
// insert the new elements /before/ the range to be dropped, i.e. at pred_
POS n = createSeg (pred_, start_, after_);
POS n = createSeg (pred_, b_.start, b_.after);
POS s = n;
//
// possibly adapt the predecessor
if (opPred_ == INS_NOP)
s = emptySeg (n, getAfter(refPred), start_);
s = emptySeg (n, getAfter(refPred), b_.start);
else
if (opPred_ == TRUNC)
s = cloneSeg (n, getStart(refPred), start_, refPred);
s = cloneSeg (n, getStart(refPred), b_.start, refPred);
//
// possibly adapt the successor
if (opSucc_ == INS_NOP)
emptySeg (pred_, after_, getStart(refSucc));
emptySeg (pred_, b_.after, getStart(refSucc));
else
if (opPred_ == TRUNC)
cloneSeg (pred_, after_, getAfter(refSucc), refSucc);
cloneSeg (pred_, b_.after, getAfter(refSucc), refSucc);
// finally discard superseded segments
POS e = discard (pred_, succ_);

52
tests/library/split-splice-test.cpp
View file

@ -63,6 +63,12 @@ namespace test {
int after;
bool empty;
~Seg()
{
check -= id;
if (id) --cnt;
}
Seg (int s, int a, bool nil=false)
: start{s}
, after{a}
@ -73,12 +79,18 @@ namespace test {
check += id;
}
~Seg()
/** create a clone, but modify bounds */
Seg (Seg const& ref, int s, int a)
: start{s}
, after{a}
, empty{ref.empty}
, id{ref.id}
{
check -= id;
if (id) --cnt;
++cnt;
check += id;
}
/** move-init: causes source-ref to be invalidated */
Seg (Seg&& rr)
: start{rr.start}
, after{rr.after}
@ -222,7 +234,37 @@ namespace test {
void
demonstrate_usage()
{
TODO ("simple usage example");
SegL segments;
cout << segments <<endl;
using OInt = std::optional<int>;
using Iter = typename SegL::iterator;
auto getStart = [](Iter elm) -> int { return elm->start; };
auto getAfter = [](Iter elm) -> int { return elm->after; };
auto createSeg= [&](Iter pos, int start, int after) -> Iter { return segments.emplace (pos, start, after); };
auto emptySeg = [&](Iter pos, int start, int after) -> Iter { return segments.emplace (pos, start, after, true); };
auto cloneSeg = [&](Iter pos, int start, int after, Iter src) -> Iter { return segments.emplace (pos, *src, start, after); };
auto discard = [&](Iter pos, Iter after) -> Iter { return segments.erase (pos,after); };
lib::splitsplice::Algo splicer{ getStart
, getAfter
, createSeg
, emptySeg
, cloneSeg
, discard
, SMAX
, segments.begin(),segments.end()
, OInt{5}, OInt{23}
};
splicer.determineRelations();
auto [s,n,e] = splicer.performSplitSplice();
cout << segments <<endl;
cout << "s:"<<*s <<endl;
cout << "n:"<<*n <<endl;
cout << "e:"<<*e <<endl;
}
@ -230,6 +272,8 @@ namespace test {
void
verify_testFixture()
{
CHECK (0 == Seg::check);
Seg::idGen = 0;
{
Seg x{1,3}; // a segment 1 (inclusive) to 3 (exclusive)
Seg u{2,4,true}; // an "empty" segment 2 (incl) to 4 (excl)

63
wiki/thinkPad.ichthyo.mm
View file

@ -70281,25 +70281,7 @@
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</node>
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<icon BUILTIN="info"/>
</node>
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<icon BUILTIN="pencil"/>
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<icon BUILTIN="button_ok"/>
</node>
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<icon BUILTIN="button_ok"/>
</node>
<node COLOR="#338800" CREATED="1683120165480" ID="ID_1260440964" MODIFIED="1683120205165" TEXT="Diagnose-Setup f&#xfc;r Memory-Management">
<node COLOR="#338800" CREATED="1683158281268" ID="ID_1471352554" MODIFIED="1683158303513" TEXT="Verdrahtung f&#xfc;r Dummy-Integer-Segmente">
<icon BUILTIN="button_ok"/>
</node>
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@ -70324,6 +70306,49 @@
</html></richcontent>
<icon BUILTIN="idea"/>
</node>
</node>
</node>
</node>
<node BACKGROUND_COLOR="#d2beaf" COLOR="#5c4d6e" CREATED="1682993091685" ID="ID_988617455" MODIFIED="1682993099148" TEXT="systematische Testabdeckung">
<icon BUILTIN="hourglass"/>
<node CREATED="1682993100755" ID="ID_1651031348" MODIFIED="1682993128370" TEXT="es sind 12 Basis-F&#xe4;lle">
<icon BUILTIN="info"/>
</node>
<node CREATED="1682993108314" ID="ID_317827435" MODIFIED="1682993122827" TEXT="hinzu kommt die Variante, da&#xdf; leere Intervalle zusammengef&#xfc;hrt werden"/>
<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1683046966788" ID="ID_1714211009" MODIFIED="1683120265331" TEXT="splitSplice-Algo isoliert testen">
<linktarget COLOR="#e31dc4" DESTINATION="ID_1714211009" ENDARROW="Default" ENDINCLINATION="-141;9;" ID="Arrow_ID_816334190" SOURCE="ID_226373762" STARTARROW="None" STARTINCLINATION="-192;20;"/>
<icon BUILTIN="pencil"/>
<node COLOR="#338800" CREATED="1683120139366" ID="ID_255513798" MODIFIED="1683120148509" TEXT="Test-Setup mit einfachen int-Intevallen">
<icon BUILTIN="button_ok"/>
</node>
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<icon BUILTIN="button_ok"/>
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<icon BUILTIN="button_ok"/>
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<head>
</head>
<body>
<p>
<font face="Monospaced" color="#2d258b">[-100~100[&#9508; </font>
</p>
<p>
<font face="Monospaced" color="#2d258b">[-100~5[[5_23[[23~100[&#9508;</font>
</p>
</body>
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