lossyWAV 1.3.0 source translated to C++ from Delphi Options

[tycho]

Here is the first public preview of the source translation of lossyWAV 1.3.0 to C++. It is not finished, but the main work is done.

- vc10_err.txt list the current compiler output in Visual Studio C++ 2010.
- A number of built-in Delphi functions are not yet converted. Most are trivial, but Write() involves some work.

Please note, I know very little of how the code actually works, I basically translated it line by line, and did minor optimizations.
Developers can look over the code and compare with the Delphi source. I have tried to take into account a number of C++'s quirks, e.g.:
- integer / integer -> integer (not floating point, but if one operand is float, it returns float)
- unsigned int (opr) signed int -> unsigned int
- & is bitwise-and, && is boolean-and, likewise with or: |, ||
- c++ base 0 arrays, versus base X in delphi. (range_array class in nSupport.h emulates that)

Optimizations:
* var = var opr value --> var opr= value;
* var = var + 1 --> ++ var;
* and a few more

I added file nSupport.h that has a few Delphi emulation functions and classes. The shared global variables are only declared in the header file. I've not defined them in the cpp files yet.

Attached File(s)

 lossyWAV_cpp.7z ( 90.42K ) Number of downloads: 60

 

[tycho]

Thank you guys. I already did IntToStr() and Copy(), but the rest goes straight in. Actually, I simply replaced directly Copy() with substr() and did the -1 adjustment. I've defined variables in cpp files, and implemented Bit_Scan_Left() and ..Right(). Both GCC and Visual Studio have intrinsic functions for these, and they are now used. There is a C-implementation for other compilers/HW as well. /add: I've also done Val()

I think the stdint.h thing is a minor problem, only the int32_t and int64_t are used. Most important now is to get it working on ONE compiler, then it's a simple matter to port it to others (older etc).

The WAV-reading files could possibly be used, although I hope it's is easier to implement the rest of the Delphi IO functions that are missing. These are roughly:

AssignFile
BlockRead
BlockWrite
Close
CloseFile
DirectoryExists
Eof
FileGetAttr
FileMode
FilePos
FileSetAttr
Reset
Rewrite
Seek

Others:
Build
DateTimeToString
Format
Now

Like I said before, many of these can be replaced with a single correponding c++ stdlib function, others need small wrappers.

This post has been edited by tycho: Aug 27 2012, 23:50