Hello, I'm not sure this is the right mailing list, so direct me if I'm not on the right one.
I'm using Python 2, PyQt 5.6 and the Python bindings of QScintilla. I need to get the styled text of an annotation, but unfortunately, QScintilla (and moreover the Python bindings) does not have a wrapper for SCI_ANNOTATIONGETSTYLES, so I'm trying to wrap it myself in Python. For easier testing purpose, I first tried to wrap myself SCI_ANNOTATIONGETTEXT, which is wrapped by annotation(), so I can adapt the QScintilla C++ code to Python: bufsize = self.SendScintilla(self.SCI_ANNOTATIONGETTEXT, line, 0L) + 1 buf = ctypes.create_string_buffer(bufsize) addr = ctypes.addressof(buf) self.SendScintilla(self.SCI_ANNOTATIONGETTEXT, line, ptr) return buf.value But the second SendScintilla call segfaults on my machine. I delved and found that on my machine (32 bits OS), for small bufsize (if <= 16), addr is a Python 'long', as it is between 1<<31 and 1<<32. When the segfault, here's what the gdb backtrace starts with: #0 __memcpy_sse2_unaligned () at ../sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S:668 #1 0xb035d6ff in Editor::BytesResult (lParam=-1, val=0x89eca50 "aaaa1", len=4) at ../src/Editor.cpp:5330 #2 0xb03628e9 in Editor::WndProc (this=0x882cb70, iMessage=2541, wParam=0, lParam=-1) at ../src/Editor.cpp:7381 #3 0xb038ae2c in ScintillaBase::WndProc (this=0x882cb70, iMessage=2541, wParam=0, lParam=-1) at ../src/ScintillaBase.cpp:1067 #4 0xb0270f36 in QsciScintillaQt::WndProc (this=0x882cb68, iMessage=2541, wParam=0, lParam=-1) at ScintillaQt.cpp:176 #5 0xb02376b1 in QsciScintillaBase::SendScintilla (this=0x883f428, msg=2541, wParam=0, lParam=-1) at qsciscintillabase.cpp:171 The reason can be clearly seen with lParam equal to -1, while it should be equal to the address I passed. If I wrap "addr" in a sip.voidptr, the segfault is the same, with lParam still equal to -1. So for reasons beyond my understanding, lParam has been erroneously converted to -1, even when using a sip.voidptr. I noticed the QScintilla Python bindings accept Python 'int' but not Python 'long'. I don't know whether it's sip or the QScintilla Python bindings which should be fixed but there is a problem. Thanks _______________________________________________ QScintilla mailing list [email protected] https://www.riverbankcomputing.com/mailman/listinfo/qscintilla
