OpenEuphoria

Re: wxEuphoria: wxWidgets_Version() Function?

• Posted by ghaberek (admin) Apr 15, 2015
• 1404 views

If I recall correctly, the version information is only exposed via macros so there are not any functions that you could link to dynamically. If you're on Windows, you could try using the GetFileVersionInfo function to determine the library's version. I've wrapped it from memory and available docs, but I don't have the opportunity to test it right now. Good luck!

include std/dll.e 
include std/machine.e 
 
atom Version_dll = open_dll( "Version.dll" ) 
constant xGetFileVersionInfoSize = define_c_func( Version_dll, "GetFileVersionInfoSizeA", {C_POINTER,C_POINTER}, C_DWORD ) 
constant xGetFileVersionInfo = define_c_func( Version_dll, "GetFileVersionInfoA", {C_POINTER,C_DWORD,C_DWORD,C_POINTER}, C_BOOL ) 
constant xVerQueryValue = define_c_func( Version_dll, "VerQueryValueA", {C_POINTER,C_POINTER,C_POINTER,C_POINTER}, C_BOOL ) 
 
public function GetFileVersionInfo( sequence filename ) 
 
    atom lpFilename = allocate_string( filename, 1 ) 
    atom dwLen = c_func( xGetFileVersionInfoSize, {lpFilename,NULL} ) 
    atom lpData = allocate_data( dwLen, 1 ) 
 
    integer result = c_func( xGetFileVersionInfo, {lpFilename,NULL,dwLen,lpData} ) 
    if result then 
        -- success 
        return lpData 
    end if 
 
    -- failure 
    return NULL 
end function 
 
public function VerQueryValue( atom info, atom value ) 
 
    atom pBlock = info 
    atom lpSubBlock = allocate_string( "\\", 1 ) 
    atom lplpBuffer = allocate_data( 4, 1 ) 
    atom puLen = allocate_data( 4, 1 ) 
 
    integer result = c_func( xVerQueryValue, {pBlock,lpSubBlock,lplpBuffer,puLen} ) 
    if result then 
        -- success 
        atom lpBuffer = peek4u( lplpBuffer ) 
        atom len = peek4u( puLen ) 
        return peek4u( lpBuffer + value ) 
    end if 
 
    -- failure 
    return {} 
end function 
 

Example:

include std/convert.e 
 
atom info = GetFileVersionInfo( "wxmsw28u_core_gcc_eu.dll" ) 
if info != NULL then 
 
    atom lo_dword = VerQueryValue( info, dwFileVersionMS ) 
    atom hi_dword = VerQueryValue( info, dwFileVersionLS ) 
 
    sequence bytes = int_to_bytes(lo_dword) & int_to_bytes(hi_dword) 
 
    atom major = bytes_to_int( bytes[3..4] ) --  2 
    atom minor = bytes_to_int( bytes[1..2] ) --  8 
    atom patch = bytes_to_int( bytes[7..8] ) -- 12 
    printf( 1, "wxWidgets %d.%d.%d\n", {major,minor,patch} ) 
 
    -- prints "wxWidgets 2.8.12" 
 
end if 

Edit:

I had some time to test this and of course it was wrong. Updated VerQueryValue function and example code. I tested against the same DLLs that you should be using from the 0.17.0 package I've provided.

-Greg