CDFFDUseStruct::CDFFDUseStruct(CXmlTree::CElt *pp, signed char parent_type, CWnd* pParent /*=NULL*/)
: CDialog(CDFFDUseStruct::IDD, pParent), saved_(pp->GetOwner())
{
modified_ = false;
first_ = false; // Default to first (see SetPosition())
pelt_ = pp;
parent_type_ = parent_type;
saved_.SaveKids(pelt_);
saved_mod_flag_ = pelt_->GetOwner()->IsModified();
show_prev_next_ = !pParent->IsKindOf(RUNTIME_CLASS(CDataFormatView)) &&
(parent_type == CHexEditDoc::DF_FILE ||
parent_type == CHexEditDoc::DF_STRUCT ||
parent_type == CHexEditDoc::DF_DEFINE_STRUCT ||
parent_type == CHexEditDoc::DF_SWITCH ||
parent_type == CHexEditDoc::DF_UNION);
pos_.x = pos_.y = -30000;
pstruct_menu_ = new CMenu;
pstruct_menu_->CreatePopupMenu();
// Build menu of structure definitions that the user can use
// Note: define_struct elements are always the first children of the root (file) node
CXmlTree::CElt ee = pelt_->GetOwner()->GetRoot().GetFirstChild();
int item_no;
for (item_no = 1; !ee.IsEmpty() && ee.GetName() == "define_struct"; ++item_no, ++ee)
pstruct_menu_->AppendMenu(MF_ENABLED, item_no, ee.GetAttr("type_name"));
// Check if no items were added (no struct definitions found)
if (item_no == 1)
pstruct_menu_->AppendMenu(MF_GRAYED, -1, _T("No definitions available"));
// Hook up the menu to the BCG button
ctl_struct_var_.m_hMenu = pstruct_menu_->GetSafeHmenu();
ctl_struct_var_.m_bOSMenu = TRUE;
ctl_struct_var_.m_bStayPressed = TRUE;
ctl_struct_var_.m_bRightArrow = TRUE;
//{{AFX_DATA_INIT(CDFFDUseStruct)
comments_ = _T("");
name_ = _T("");
struct_ = _T("");
expr_ = _T("");
//}}AFX_DATA_INIT
}
// Static functions used by make_var_menu_tree (below)
static void add_menu_items(CMenu *pmenu, int &item_no, const CXmlTree::CElt ¤t_elt, CString name)
{
CString ss = current_elt.GetName(); // type of this node
// Add element name unless parent is FOR (or we are IF/SWITCH/JUMP which use child name)
if (ss != "if" && ss != "switch" && ss != "jump" && name.Right(1) != "]")
name += current_elt.GetAttr("name");
if (ss == "data")
{
pmenu->AppendMenu(MF_ENABLED, item_no++, name);
}
else if (ss == "for")
{
// Add array access operator [] and add item(s) for sub-element
ASSERT(current_elt.GetNumChildren() <= 1); // May be zero for new elt
if (current_elt.GetNumChildren() > 0)
add_menu_items(pmenu, item_no, current_elt.GetFirstChild(), name+"[ ]");
}
else if (ss == "struct")
{
// Add items for all sub-elements of the struct
for (CXmlTree::CElt ee = current_elt.GetFirstChild(); !ee.IsEmpty(); ++ee)
{
add_menu_items(pmenu, item_no, ee, name+".");
}
}
else if (ss == "use_struct")
{
CString ss = current_elt.GetAttr("type_name"); // Find struct name to use
CXmlTree::CElt ee = current_elt.GetOwner()->GetRoot().GetFirstChild();
for ( ; !ee.IsEmpty() && ee.GetName() == "define_struct"; ++ee)
if (ss == ee.GetAttr("type_name"))
{
// Check if recursive call to same defined struct
for (std::vector<CString>::const_iterator ps = prev_defined.begin(); ps != prev_defined.end(); ++ps)
{
if (*ps == ss)
return; // avoid recursion into same define_struct
}
prev_defined.push_back(ss);
// Add items for all sub-elements of the struct
for (CXmlTree::CElt ee2 = ee.GetFirstChild(); !ee2.IsEmpty(); ++ee2)
{
add_menu_items(pmenu, item_no, ee2, name+".");
}
break; // Found the (hopefully) only one with the correct name
}
}
else if (ss == "if")
{
if (current_elt.GetNumChildren() > 0)
add_menu_items(pmenu, item_no, current_elt.GetFirstChild(), name);
if (current_elt.GetNumChildren() > 1)
{
// Add a separate item for the else part
ASSERT(current_elt.GetNumChildren() == 3 && current_elt.GetChild(1).GetName() == "else");
add_menu_items(pmenu, item_no, current_elt.GetChild(2), name);
}
}
else if (ss == "switch")
{
// Add names of all case sub-elements
CStringList found; // just used to eliminate duplicate data elts
for (CXmlTree::CElt ee = current_elt.GetFirstChild(); !ee.IsEmpty(); ++ee)
{
ASSERT(ee.GetName() == "case");
if (ee.GetFirstChild().GetName() == "data")
{
CString ss = ee.GetFirstChild().GetAttr("name");
if (!ss.IsEmpty())
{
if (found.Find(ss) != NULL)
continue; // ignore data elements with the same name
else
found.AddTail(ss); // store this one for later checks
}
}
add_menu_items(pmenu, item_no, ee.GetFirstChild(), name);
}
}
else if (ss == "jump")
{
if (current_elt.GetNumChildren() > 0)
add_menu_items(pmenu, item_no, current_elt.GetFirstChild(), name);
}
else if (ss == "define_struct" || ss == "eval")
{
// Do nothing here
}
else
ASSERT(0);
}
CString get_name(const CXmlTree::CElt &ee)
{
ASSERT(!ee.IsEmpty());
CString elt_type = ee.GetName();
if (elt_type == "define_struct")
{
return ee.GetAttr("type_name") + CString(" [STRUCT DEFN]");
}
else if (elt_type == "struct")
{
return ee.GetAttr("name") + CString(" [STRUCT]");
}
else if (elt_type == "use_struct")
{
return ee.GetAttr("name") + CString(" - using ") + ee.GetAttr("type_name");
}
else if (elt_type == "for")
{
CString name = ee.GetAttr("name");
if (name.IsEmpty())
return CString("[FOR] - ") + get_name(ee.GetFirstChild());
else
return name + CString(" [FOR]");
}
else if (elt_type == "if")
{
CString name1 = get_name(ee.GetFirstChild());
CString name2;
if (ee.GetNumChildren() > 1)
{
// Get name for else part
ASSERT(ee.GetNumChildren() == 3 && ee.GetChild(1).GetName() == "else");
name2 = get_name(ee.GetChild(2));
}
if (name1.IsEmpty())
name1 = name2; // no name for IF part so use else part
else if (!name2.IsEmpty() && name1 != name2)
name1 += "/" + name2; // Combine both names
return CString("[IF] - ") + name1;
}
else if (elt_type == "switch")
{
return CString("[CASE] ") + ee.GetAttr("test");
}
else if (elt_type == "jump")
{
return CString("[JUMP] - ") + get_name(ee.GetFirstChild());
}
else if (elt_type == "eval")
{
return CString("[EVAL] ") + ee.GetAttr("expr");
}
else if (elt_type == "data")
{
CString name = ee.GetAttr("name");
if (name.IsEmpty())
return CString("[DATA]");
else
return name;
}
else
ASSERT(0);
return CString("ERROR");
}
// Return the size of an element (if it only contains data and/or struct elements) checking
// the size of struct children if necessary. If any children are DATA elements with calc'd
// size (or FOR or IF) then -1 is returned.
long get_size(const CXmlTree::CElt &ee, int first /*=0*/, int last /*=999999999*/)
{
long retval = 0;
CXmlTree::CElt child;
int ii;
int bits_used = 0; // Bits used by all consec. bitfields so far (0 if previous elt not a bitfield)
int last_size; // Storage unit size of previous element if a bitfield (1,2,4, or 8) or 0
bool last_down; // Direction for previous bitfield (must be same dirn to be put in same stg unit)
for (child = ee.GetChild(first), ii = first; !child.IsEmpty() && ii < last; ++child, ++ii)
{
CString elt_type = child.GetName();
if (elt_type != "data" && bits_used > 0)
{
// End of bit-field stg unit
ASSERT(last_size == 1 || last_size == 2 || last_size == 4 || last_size == 8);
retval += last_size;
bits_used = 0;
}
if (elt_type == "data")
{
CString ss = child.GetAttr("type");
int data_bits = 0; // bits used in this element (or zero if not a bit-field)
int data_size;
bool data_down;
// Check for bit-field (type is "int")
if (ss.CompareNoCase("int") == 0)
{
data_bits = atoi(child.GetAttr("bits"));
if (data_bits > 0)
{
data_size = atoi(child.GetAttr("len"));
data_down = child.GetAttr("direction") == "down";
}
}
if (bits_used > 0 &&
(data_bits == 0 || // not bit-field
data_size != last_size || // diff size
data_down != last_down || // diff dirn
bits_used + data_bits > data_size*8) // overflow stg unit
)
{
// Previous elt was end of the bit-field stg unit
ASSERT(last_size == 1 || last_size == 2 || last_size == 4 || last_size == 8);
retval += last_size;
bits_used = 0;
}
if (data_bits > 0)
{
// Save info about current bit-field
bits_used += data_bits;
last_size = data_size;
last_down = data_down;
}
else if (ss.CompareNoCase("char") == 0)
{
// Work out the size of a character (normally 1 unless Unicode)
ss = child.GetAttr("format");
if (ss.CompareNoCase("unicode") == 0)
retval += 2;
else
retval += 1;
}
else if (ss.CompareNoCase("date") == 0)
{
// Work out the size of the date field depending on the format
ss = child.GetAttr("format");
if (ss.CompareNoCase("c") == 0)
retval += 4;
else if (ss.CompareNoCase("c51") == 0)
retval += 4;
else if (ss.CompareNoCase("c7") == 0)
retval += 4;
else if (ss.CompareNoCase("cmin") == 0)
retval += 4;
else if (ss.CompareNoCase("c64") == 0)
retval += 8;
else if (ss.CompareNoCase("ole") == 0)
retval += 8;
else if (ss.CompareNoCase("systemtime") == 0)
retval += 16;
else if (ss.CompareNoCase("filetime") == 0)
retval += 8;
else if (ss.CompareNoCase("msdos") == 0)
retval += 4;
else
{
ASSERT(0);
return -1;
}
}
else
{
// Get the size of the child by checking
ss = child.GetAttr("len");
char *endp;
//ss.TrimLeft();
//ss.TrimRight();
// Note: we could use expression parser to handle constant expression (eg, "10+1") but is it necessary?
long len = strtoul(ss, &endp, 10);
// Make sure the string was not empty and there was nothing after the number (eg, not "5+n")
if (endp > (const char *)ss && endp - (const char *)ss == ss.GetLength())
retval +=len;
else
return -1L; // Does not appear to be a simple number so assume it is an expression
}
}
else if (elt_type == "struct" || elt_type == "binary_file_format")
{
// Get the size of child by looking at its children
long child_size = get_size(child);
if (child_size > -1)
retval += child_size;
else
return -1L; // Child size is indeterminate, therefore so is our size
}
else if (elt_type == "use_struct")
{
long tmp = -1;
// Find define_struct and get its size
CString ss = child.GetAttr("type_name"); // Find struct name to use
CXmlTree::CElt ee = child.GetOwner()->GetRoot().GetFirstChild();
for ( ; !ee.IsEmpty() && ee.GetName() == "define_struct"; ++ee)
if (ss == ee.GetAttr("type_name"))
tmp = get_size(ee);
// Not found
if (tmp == -1)
return -1L;
else
retval += tmp;
}
else if (elt_type == "eval" || elt_type == "jump" || elt_type == "define_struct")
; // zero size so just do nothing to retval
else if (elt_type == "for")
{
// Get the size of the FOR elt's (only) child and multiply by the number of array elts
long child_size = get_size(child);
if (child_size <= -1)
return -1L; // Child size is indeterminate, therefore so is our size
// Handle FOR that contains a constant integer in count
CString ss = child.GetAttr("count");
char *endp;
ss.TrimLeft();
ss.TrimRight();
// Note: we could use expression parser to handle constant expression (eg, "10+1") but is it necessary?
long count = strtoul(ss, &endp, 10);
// Make sure the string was not empty and there was nothing after the number (eg not "10*n")
if (endp > (const char *)ss && endp - (const char *)ss == ss.GetLength())
retval += count * child_size;
else
return -1L; // Does not appear to be a simple number so assume it is an expression
}
else
return -1L; // xxx handle constant size IF/FOR
}
// Add last bit-field stg unit if there was one
if (bits_used > 0)
{
ASSERT(last_size == 1 || last_size == 2 || last_size == 4 || last_size == 8);
// Don't add stg unit if elt after the range (ie last) is part of the same unit as the previous elt
bool add_last = true;
if (last < ee.GetNumChildren()) // make sure we are not off the end
{
ASSERT(!child.IsEmpty());
int data_bits;
// Check if last (elt one past the end) is part of the previous bit-field stg unit
if (child.GetName() == "data" && // data field
child.GetAttr("type").CompareNoCase("int") == 0 && // integer type
(data_bits = atoi(child.GetAttr("bits"))) > 0 && // bitfield
atoi(child.GetAttr("len")) == last_size && // same size as previous one
(child.GetAttr("direction") == "down") == last_down && // same dirn as previous one
bits_used + data_bits <= last_size*8)
{
add_last = false; // part way through a stg unit so don't add it to the size
}
}
if (add_last)
retval += last_size;
}
return retval;
}