diff options
Diffstat (limited to 'src/Document.cxx')
| -rw-r--r-- | src/Document.cxx | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/Document.cxx b/src/Document.cxx index c25dc84b9..7d34dace1 100644 --- a/src/Document.cxx +++ b/src/Document.cxx @@ -767,23 +767,24 @@ bool Document::NextCharacter(int &pos, int moveDir) const { } } +// Return -1 on out-of-bounds int SCI_METHOD Document::GetRelativePosition(int positionStart, int characterOffset) const { int pos = positionStart; if (dbcsCodePage) { const int increment = (characterOffset > 0) ? 1 : -1; while (characterOffset != 0) { const int posNext = NextPosition(pos, increment); - if (posNext == Length()) - return posNext; - else if (posNext == pos) + if (posNext == pos) return INVALID_POSITION; pos = posNext; characterOffset -= increment; } } else { pos = positionStart + characterOffset; + if ((pos < 0) || (pos > Length())) + return INVALID_POSITION; } - return ClampPositionIntoDocument(pos); + return pos; } int Document::GetRelativePositionUTF16(int positionStart, int characterOffset) const { |