Phix: 64bit (-1) equal #ffffffffffffffff ?!
- Posted by andreasWagner in February
- 437 views
Hallo
To make it more clear i have put togheter this small codefile.
The function scan_com_ports() should return a list of available serial ports.
The function serial_open()
should open a serial port and return the handle or INVALID_HANDLE_VALUE(-1) if it fails
C:\TDM-GCC-64\x86_64-w64-mingw32\include>grep -i INVALID_HANDLE_VALUE *.* pdh.h:#define INVALID_HANDLE_VALUE ((HANDLE)((LONG_PTR)-1)) handleapi.h:#define INVALID_HANDLE_VALUE ((HANDLE) (LONG_PTR)-1)This works nice with Phix 32bit:
The result on my Computer: (yes, (COM7: and COM8: is what i expected)
196
11000100
11111111111111111111111111111111
224
11100000
11111111111111111111111111111111
{"COM7:","COM8:"}
But works not so nice with Phix 64bit:
If it fails,the function returns #ffffffffffffffff instead of (-1), isn't it the same?
The result on my Computer:
18446744073709551615
1111111111111111111111111111111111111111111111111111111111111111
1111111111111111111111111111111111111111111111111111111111111111
18446744073709551615
1111111111111111111111111111111111111111111111111111111111111111
1111111111111111111111111111111111111111111111111111111111111111
152
10011000
1111111111111111111111111111111111111111111111111111111111111111
156
10011100
1111111111111111111111111111111111111111111111111111111111111111
18446744073709551615
1111111111111111111111111111111111111111111111111111111111111111
1111111111111111111111111111111111111111111111111111111111111111
18446744073709551615
1111111111111111111111111111111111111111111111111111111111111111
1111111111111111111111111111111111111111111111111111111111111111
{"COM5:","COM6:","COM7:","COM8:","COM9:","COM10:"}
include cffi.e constant kernel=open_dll("kernel32.dll") --REF: http://msdn.microsoft.com/en-us/library/aa363858(VS.85).aspx --constant iCreateFile = define_c_func(kernel,"CreateFileA",{C_INT,C_INT,C_INT,C_INT,C_INT,C_INT,C_INT},C_INT) sequence tStr=""" HANDLE CreateFileA( _in_ LPCSTR lpFileName, _in_ DWORD dwDesiredAccess, _in_ DWORD dwShareMode, _in_ LPVOID lpSecurityAttributes, _in_ DWORD dwCreationDisposition, _in_ DWORD dwFlagsAndAttributes, _in_ HANDLE hTemplateFile ); """ set_unicode(0) constant iCreateFile=define_cffi_func(kernel,tStr) constant GENERIC_READ = #80000000, GENERIC_WRITE = #40000000, OPEN_EXISTING = 3 -- open a serial port and return the handle or INVALID_HANDLE_VALUE(-1) if it fails global function serial_open(integer com) atom fn_val, pComm pComm = allocate_string(sprintf("\\\\.\\com%d",com)) fn_val = c_func(iCreateFile,{pComm, GENERIC_READ+GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0 }) free(pComm) if equal(fn_val,#ffffffffffffffff) then -- fn_val=-1 --This helps with Phix 64bit, but i think it is an ugly hack, end if return fn_val end function --REF: http://msdn.microsoft.com/en-us/library/ms724211.aspx --constant iCloseHandle = define_c_func(kernel,"CloseHandle",{C_UINT},C_INT) tStr=""" BOOL CloseHandle( _in_ HANDLE hObject ); """ set_unicode(0) constant iCloseHandle=define_cffi_func(kernel,tStr) global procedure serial_close(atom hCom) atom fn_val fn_val = c_func(iCloseHandle,{hCom}) end procedure function scan_com_ports() atom hcom sequence retval={} for i=5 to 10 do hcom=serial_open(i) if hcom>0 then puts(1,sprintf("%d\n",hcom)) puts(1,sprintf("%b\n",hcom)) puts(1,sprintf("%b\n\n",-1)) --just to make sure I'am not completly confused serial_close(i) retval=append(retval,(sprintf("COM%d:",i))) end if end for return retval end function ?scan_com_ports() wait_key()
Maybe someone can enlighten me.
Maybe I should just continue with 32bit. For my small programs there is not really a need to support 64bit. This is not the first time I have come across such oddities. I just forgot about it.
Andreas
