Sorry to send all these grumpy mails ...
If I use the original construct for MathedIter::GetInset I get the following
very wrong result for p in MathParInset::Metrics:
(gdb) run
Starting program: /usr/src/lyx/lyx-1_0_x/src/lyx
Breakpoint 1, MathParInset::Metrics (this=0x12045d3c0) at math_draw.C:170
170 if (MathIsInset(cx)) {
(gdb) list
165 mathed_string_height(data.FCode(), size, s, ls, asc, des);
166 if (asc > ascent) ascent = asc;
167 if (des > descent) descent = des;
168 limits = false;
169 } else
170 if (MathIsInset(cx)) {
171 MathedInset *p = data.GetInset();
172 p->SetStyle(size);
173 p->Metrics();
174 if (cx==LM_TC_UP) {
(gdb) print cx
$1 = 8 '\b'
(gdb) next
171 MathedInset *p = data.GetInset();
(gdb) print data
$2 = {<MathedIter> = {flags = 0, fcode = -1, pos = 0, row = 0, col = 0,
ncols = 1, array = 0x12045cef0, stck = {fcode = 14928, x = 1,
y = 536856360, pos = 1, row = 0, col = 0},
_vptr. = 0x120231df8 <MathedXIter virtual table>}, size = 1, x = 0, y = 0,
p = 0x12045d3c0, sx = 0, sw = 0, limits = false, s_type = 0, crow = 0x0}
(gdb) next
172 p->SetStyle(size);
(gdb) print p
$3 = (class MathedInset *) 0x10
^^^^
See here ? Of cours we crash when calling a member function of this "object" at
address 0x10 :-(
(gdb) cont
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x12010a50c in MathParInset::Metrics (this=0x12045d3c0) at math_draw.C:172
172 p->SetStyle(size);
If I do the same with the reinterpret_cast alternative I sent before, I get
(gdb) print data
$2 = {<MathedIter> = {flags = 0, fcode = -1, pos = 0, row = 0, col = 0, ncols = 1,
array = 0x12045cde0, stck = {fcode = 14864, x = 1,
y = 536856344, pos = 1, row = 0, col = 0}, _vptr. = 0x120231db8 <MathedXIter
virtual table>}, size = 1, x = 0, y = 0,
p = 0x12045d2b0, sx = 0, sw = 0, limits = false, s_type = 0, crow = 0x0}
(gdb) next
172 p->SetStyle(size);
(gdb) print p
$3 = (class MathedInset *) 0x12045cea1
Almost correct copy :-?
Greetings,
Jochen
-----------------------------------------------------------------------
Jochen K"upper
Heinrich-Heine-Universit"at D"usseldorf [EMAIL PROTECTED]
Institut f"ur Physikalische Chemie I
Universit"atsstr. 1, Geb 26.43 Raum 02.29 phone ++49-211-8113681
40225 D"usseldorf fax ++49-211-8115195
Germany http://www-public.rz.uni-duesseldorf.de/~jochen
-----------------------------------------------------------------------
