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digitalmars.D - some problems!

reply "aelmetwaly" <aelmetwaly gawab.com> writes:
// Questions
Hi there,
Please I need advice on the following subjects:

1- Some macro #defines are deficult to implement on D. eg.:
 #define rvaDLLName  szName
 don't tell me to do a global search and replace! the code is generic and
need to still generic

.
2- How I can implement template functions in D. eg.:
 in C++:
 template <class T> void DumpOptionalHeader(T* pImageOptionalHeader);
 I converted it to:
 template DumpOptionalHeader(T = IMAGE_OPTIONAL_HEADER32) {
 void DumpOptionalHeader(T* pImageOptionalHeader)  // 'T' is
IMAGE_OPTIONAL_HEADER32/64
 { ... } }
 Is this right? or is there any beter way?


3- The following code compile in C++ but not in D and compiler give outside
array bounds error. why?
 in C++:
 typedef struct DATASYM32 {
  unsigned short  reclen;         // Record length
  unsigned short  rectyp;         // S_LDATA32, S_GDATA32 or S_PUB32
  CV_uoff32_t     off;
  unsigned short  seg;
  CV_typ_t        typind;         // Type index
  unsigned char   name[1];        // Length-prefixed name
 } DATASYM32;
 typedef DATASYM32 PUBSYM32;

 PCSTR pszUndecoratedName = (PCSTR)&pDataSym32->name[1]; // < == NOTE this

 I converted it to but the markered array line give outside array bounds
error [0..1]
 struct DATASYM32 {
     ushort  reclen;         // Record length
     ushort  rectyp;         // S_LDATA32, S_GDATA32 or S_PUB32
     CV_uoff32_t     off;
     ushort  seg;
     CV_typ_t        typind;         // Type index
     ubyte   name[2];        // Length-prefixed name // originally, it was
name[1] but the code below
         // gives outside of array bounds error although it compiles wright
in C++. ??!!!
 } ;
 alias DATASYM32 PUBSYM32;


 PCSTR pszUndecoratedName = cast(PCSTR)&pDataSym32.name[1];


4- about primitive types in C++ is:
 unsigned long => ulong or uint ?
 and other types, and it's equivelent in d ?


5- Is there any documentation or references about OMF lib format on the
internet. maybe I can relate the data
 structures with the new Microsoft COFF archive format!
Sep 20 2004
next sibling parent Regan Heath <regan netwin.co.nz> writes:
On Mon, 20 Sep 2004 21:37:33 +0300, aelmetwaly <aelmetwaly gawab.com> 
wrote:

 // Questions
 Hi there,
 Please I need advice on the following subjects:

 1- Some macro #defines are deficult to implement on D. eg.:
  #define rvaDLLName  szName
  don't tell me to do a global search and replace! the code is generic and
 need to still generic



Can't you use 'alias' or typedef eg.

alias szName rvaDLLName;
typedef szName rvaDLLName;


 2- How I can implement template functions in D. eg.:
  in C++:
  template <class T> void DumpOptionalHeader(T* pImageOptionalHeader);
  I converted it to:
  template DumpOptionalHeader(T = IMAGE_OPTIONAL_HEADER32) {
  void DumpOptionalHeader(T* pImageOptionalHeader)  // 'T' is
 IMAGE_OPTIONAL_HEADER32/64
  { ... } }
  Is this right? or is there any beter way?



That looks right, tho I wish there was a slightly shorter way to do it, 
something like:

template(T = IMAGE_OPTIONAL_HEADER32) DumpOptionalHeader(T* 
pImageOptionalHeader) {
}

basically if the template only contains 1 function we shouldn't need to 
repeat the template/function name, and the {} for the template aren't 
really necessary either.

This may be ambiguous to parse however, only Walter could say for sure.


 3- The following code compile in C++ but not in D and compiler give 
 outside
 array bounds error. why?
  in C++:
  typedef struct DATASYM32 {
   unsigned short  reclen;         // Record length
   unsigned short  rectyp;         // S_LDATA32, S_GDATA32 or S_PUB32
   CV_uoff32_t     off;
   unsigned short  seg;
   CV_typ_t        typind;         // Type index
   unsigned char   name[1];        // Length-prefixed name
  } DATASYM32;
  typedef DATASYM32 PUBSYM32;

  PCSTR pszUndecoratedName = (PCSTR)&pDataSym32->name[1]; // < == NOTE 
 this



So it looks to me like the string resides in the memory after the 
"unsigned char name[1]" array, which itself simply holds the length of the 
string?


  I converted it to but the markered array line give outside array bounds
 error [0..1]
  struct DATASYM32 {
      ushort  reclen;         // Record length
      ushort  rectyp;         // S_LDATA32, S_GDATA32 or S_PUB32
      CV_uoff32_t     off;
      ushort  seg;
      CV_typ_t        typind;         // Type index
      ubyte   name[2];        // Length-prefixed name // originally, it 
 was
 name[1] but the code below
          // gives outside of array bounds error although it compiles 
 wright
 in C++. ??!!!
  } ;
  alias DATASYM32 PUBSYM32;


  PCSTR pszUndecoratedName = cast(PCSTR)&pDataSym32.name[1];



In order to stop D doing bounds checking you have to either:
1. compile using -release.
2. stop using an array.

#1 will likely solve the problem right now, but you'll never be able to do 
a debug build again, so #2 is IMO the better solution, try this...

struct DATASYM32 {
   ushort reclen;
   ushort rectyp;
   CV_uoff32_t off;
   ushort  seg;
   CV_typ_t typind;
   ubyte name;
}
alias DATASYM32 PUBSYM32;

PCSTR pszUndecoratedName = cast(PCSTR)(&pDataSym32.name + ubyte.sizeof);

I think that is correct. Someone will no doubt correct me if I am wrong.


 4- about primitive types in C++ is:
  unsigned long => ulong or uint ?
  and other types, and it's equivelent in d ?



See
http://www.digitalmars.com/d/type.html


 5- Is there any documentation or references about OMF lib format on the
 internet. maybe I can relate the data
  structures with the new Microsoft COFF archive format!



I have no idea :)

Regards,
Regan

-- 
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/
Sep 29 2004
prev sibling parent J C Calvarese <jcc7 cox.net> writes:
aelmetwaly wrote:

 // Questions
 Hi there,
 Please I need advice on the following subjects:
 




 5- Is there any documentation or references about OMF lib format on the
 internet. maybe I can relate the data
  structures with the new Microsoft COFF archive format!



I think I've read that the Standalone OpenWatcom Tools 
(http://cmeerw.org/prog/owtools/) can be helpful when trying to use COFF 
and OMF together, but I might be remembering it wrong.

The website mentions both OMF and COFF:

dmpobj.exe (68 kB - Sun, 09 Nov 2003) (Open Watcom *OMF* Dump Utility)

support for COFF libraries (including Microsoft's new-style *COFF* 
import libraries)

-- 
Justin (a/k/a jcc7)
http://jcc_7.tripod.com/d/
Sep 29 2004