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Clipper: Verify range of int32 coordinates on input.

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This commit is contained in:
Vojtech Bubnik 2022-08-02 13:22:33 +02:00
parent 5868028a7e
commit fa7debf49d
1 changed files with 18 additions and 4 deletions
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22
src/clipper/clipper.cpp
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@ -602,9 +602,18 @@ bool HorzSegmentsOverlap(cInt seg1a, cInt seg1b, cInt seg2a, cInt seg2b)
// ClipperBase class methods ...
//------------------------------------------------------------------------------
#ifndef CLIPPERLIB_INT32
#ifdef CLIPPERLIB_INT32
static inline void RangeTest(const IntPoint &pt)
{
#ifndef NDEBUG
static constexpr const int32_t hi = 65536 * 16383;
if (pt.x() > hi || pt.y() > hi || -pt.x() > hi || -pt.y() > hi)
throw clipperException("Coordinate outside allowed range");
#endif // NDEBUG
}
#else // CLIPPERLIB_INT32
// Called from ClipperBase::AddPath() to verify the scale of the input polygon coordinates.
inline void RangeTest(const IntPoint& Pt, bool& useFullRange)
static inline void RangeTest(const IntPoint& Pt, bool& useFullRange)
{
if (useFullRange)
{
@ -798,7 +807,10 @@ bool ClipperBase::AddPathInternal(const Path &pg, int highI, PolyType PolyTyp, b
try
{
edges[1].Curr = pg[1];
#ifndef CLIPPERLIB_INT32
#ifdef CLIPPERLIB_INT32
RangeTest(pg[0]);
RangeTest(pg[highI]);
#else
RangeTest(pg[0], m_UseFullRange);
RangeTest(pg[highI], m_UseFullRange);
#endif // CLIPPERLIB_INT32
@ -806,7 +818,9 @@ bool ClipperBase::AddPathInternal(const Path &pg, int highI, PolyType PolyTyp, b
InitEdge(&edges[highI], &edges[0], &edges[highI-1], pg[highI]);
for (int i = highI - 1; i >= 1; --i)
{
#ifndef CLIPPERLIB_INT32
#ifdef CLIPPERLIB_INT32
RangeTest(pg[i]);
#else
RangeTest(pg[i], m_UseFullRange);
#endif // CLIPPERLIB_INT32
InitEdge(&edges[i], &edges[i+1], &edges[i-1], pg[i]);