problems playing audio with mciSendString
Hello all,
I would really appreciate some assistance on this. The intent is to
create a vocabulary/flashcard program with proper pronunciations.
Pronunciations are saved as individual mp3 files which I want to
play whenever a new term is displayed. My current attempt is simply
to get the the file (any mp3 file really) to play. All indication
form the two references I'm using (http://msdn.microsoft.com/en-
us/library/dd757161(v=VS.85).aspx and
http://www.apitalk.com/windows-Programming/Play-Mp3,-Wav,-Wmv,-Mpg,-
Avi-Etc-Files-In-Win32-Api-Program.html) say that this little script
is supposed to work. The error codes as reported by mciSendString
even suggest that it is working, however I'm not hearing any sound
at all.
suggestions anyone?
import std.stdio : writeln;
import std.string : cstring = toStringz;
import std.c.windows.windows;
pragma(lib, "winmm.lib" );
extern(Windows) {
uint mciSendStringA(
LPCTSTR lpszCommand,
LPTSTR lpszReturnString,
uint cchReturn,
HANDLE hwndCallback);
}
uint mciSendString(string s)
{
return mciSendStringA( cstring(s), cast(LPTSTR)null, 0,
cast(HANDLE)0 );
}
void main()
{
auto exist = mciSendString("open CC_10_mins.mp3 type
mpegvideo alias myFile");
auto succeeded = mciSendString("play myFile");
auto closed = mciSendString("close myFile");
writeln( exist, " - ", succeeded, " - ", closed );
}
PROGRAM OUTPUT
==
when file exists:
D:\code>play
0 - 0 - 0
when file does not exist:
D:\code>play
275 - 263 - 263
Re: problems playing audio with mciSendString
Thanks,
The problem was that mciSendString was immediately returning control
to the caller after being called. This simple change fixed the
problem:
mciSendString("play myFile wait");
Unicode: how to properly read and display directory entries?
Hello,
What is the proper way to read a directory such that file names are not
garbled? Here is the example I borrowed form the std.file documentation.
Screen shots of folder is attached. Thanks.
void main(string[] args)
{
bool callback(DirEntry* de)
{
if (de.isfile)
mciPlay(toUTF8(de.name));
return true;
}
listdir("snd", &callback);
}
D:\code>play
snd\american.ogg
snd\bigdog.flac
snd\blackmail.mp3
snd\ding.wav
snd\kam.aif.aiff
snd\豺｡縺・ogg
<>
Re: Unicode: how to properly read and display directory entries?
On 11/5/2010 10:51 PM, Kagamin wrote:
Tyro[a.c.edwards] Wrote:
Hello,
What is the proper way to read a directory such that file names are not
garbled? Here is the example I borrowed form the std.file documentation.
Screen shots of folder is attached. Thanks.
void main(string[] args)
{
bool callback(DirEntry* de)
{
if (de.isfile)
mciPlay(toUTF8(de.name));
return true;
}
listdir("snd",&callback);
}
D:\code>play
snd\american.ogg
snd\bigdog.flac
snd\blackmail.mp3
snd\ding.wav
snd\kam.aif.aiff
snd\豺｡縺・ogg
http://d.puremagic.com/issues/show_bug.cgi?id=2742
Much appreciate the info. I'm not however interested in outputting to
the console. I'm trying to call mciSendString with the name of each file
contained in the directory. The process fails however, when it
encounters a Japanese file name. Please see code below. Any idea what
I'm doing wrong?
import std.file;
import std.string : cstring = toStringz;
import std.c.windows.windows;
pragma(lib, "winmm.lib" );
extern(Windows) {
uint mciSendStringW(
LPCWSTR lpszCommand,
LPWSTR lpszReturnString,
uint cchReturn,
HANDLE hwndCallback);
}
void main(string[] args)
{
bool callback(DirEntry* de)
{
if (de.isfile)
mciPlay(de.name);
return true;
}
listdir("snd", &callback);
}
void mciPlay(string audio)
{
uint mciSendString(string s)
{
return mciSendStringW( cast(LPCWSTR)s, cast(LPWSTR)null, 0,
cast(HANDLE)0 );
}
auto exists = mciSendString(`open "` ~ audio ~ `" type mpegvideo alias
myFile`);
auto played = mciSendString("play myFile wait");
scope(exit) mciSendString("close myFile");
}
Re: Unicode: how to properly read and display directory entries?
On 11/6/2010 2:10 AM, Dmitry Olshansky wrote:
On 05.11.2010 18:25, Tyro[a.c.edwards] wrote:
On 11/5/2010 10:51 PM, Kagamin wrote:
Tyro[a.c.edwards] Wrote:
Hello,
What is the proper way to read a directory such that file names are not
garbled? Here is the example I borrowed form the std.file
documentation.
Screen shots of folder is attached. Thanks.
void main(string[] args)
{
bool callback(DirEntry* de)
{
if (de.isfile)
mciPlay(toUTF8(de.name));
return true;
}
listdir("snd",&callback);
}
D:\code>play
snd\american.ogg
snd\bigdog.flac
snd\blackmail.mp3
snd\ding.wav
snd\kam.aif.aiff
snd\豺｡縺・ogg
http://d.puremagic.com/issues/show_bug.cgi?id=2742
Much appreciate the info. I'm not however interested in outputting to
the console. I'm trying to call mciSendString with the name of each
file contained in the directory. The process fails however, when it
encounters a Japanese file name. Please see code below. Any idea what
I'm doing wrong?
import std.file;
import std.string : cstring = toStringz;
import std.c.windows.windows;
pragma(lib, "winmm.lib" );
extern(Windows) {
uint mciSendStringW(
LPCWSTR lpszCommand,
LPWSTR lpszReturnString,
uint cchReturn,
HANDLE hwndCallback);
}
void main(string[] args)
{
bool callback(DirEntry* de)
{
if (de.isfile)
mciPlay(de.name);
return true;
}
listdir("snd", &callback);
}
void mciPlay(string audio)
{
uint mciSendString(string s)
{
return mciSendStringW( cast(LPCWSTR)s, cast(LPWSTR)null, 0,
cast(HANDLE)0 );
}
auto exists = mciSendString(`open "` ~ audio ~ `" type mpegvideo alias
myFile`);
auto played = mciSendString("play myFile wait");
scope(exit) mciSendString("close myFile");
}
In short : never rely on the casts to do the right thing.
Bug is here:
return mciSendStringW( cast(LPCWSTR)s, cast(LPWSTR)null, 0,
cast(HANDLE)0 );
changing that to more accurate:
return mciSendStringW(toUTF16z(s) , cast(LPWSTR)null, 0, cast(HANDLE)0 );
works for me, even with this name:
snd\와카미야 온마쓰리.mp3
If you use W version you need to re-encode your UTF8 string to UTF16.
AFAIK Windows uses slightly outdated version of UTF16, check the web on
issues.
That's it! Thank you much. I tried the toUTFXX() function calls but
completely missed toUTF16z.
Re: C++ to D: Help please
On 2/25/2011 3:33 AM, Jesse Phillips wrote: Well using one language you aren't familiar with to learn another is probably not the best strategy. For one thing C++ uses namespaces and D uses modules. They are both about name-space but are very different approaches. If you want to learn about modules then write a simple application. Place all functions in one module/file and import that into a file that contains the main function. Then call $ dmd file1.d file2.d Right again. It would be great to have complete tutorials for D. But the fact is we don't, so one has little choice but to use another language's tutorial. Truth be told, I was hoping that Bartosz Milewski, a very active programmer in the D community would see my post and, would realize that I was using his tutorials and offer to port them to D so that the community as a whole would benefit from them. I've gotten away of trying to ask authors directly to convert their material to D because that rarely ever works. As far as learning the differences between C++ and D, I really have no desire. I'm what you might call an advanced beginning D programmer. Lost but not dumb: I do know how the D module system works and I have an inkling of how C++ namespaces work. I know the basics of programming (in D language, but the basics translate to any other language quite easily) and am looking for ways to use that to do something useful. Unfortunately, the more complete/useful tutorials are written in C/C++ and not my language of choice: D. The authors of those tutorials have no interest in D or probably have never even heard of D and would care less about it's existence because it does not positively affect their financial well being. I will eventually port the program, because that is what I want to do. But the fact is, that will take several months using a trial and error approach. I was just hoping to get through the process a little faster and learning from that example, go ahead and port the rest of the tutorials on Bartosz's site. Sorry for assuming someone would be willing to offer to lend a hand in doing so. I would offer to compensate that individual for time lost doing the conversion but I have no idea what would be a reasonable offer and refrained from doing so because I had no desire to offend anyone here. Well, thank you all.
Initializing a class pointer
class Class{}
void main()
{
Class myClass;
Class* pClass0 = &myClass; // OK
Class* pClass1 = new Class; // Error: cannot implicitly convert [8]
// expression (new Class) of type t.Class
// to test.Class*
Class* pClass2 = &(new Class);
// Error: new Class is not an lvalue[12]
Class mClass = &(new Class);// Error: cannot implicitly convert [14]
// expression (&new Class) of type Class*
// to test.Class
}
C++ uses the process on line [8] above to initialize a class pointer.
Obviously it does not work in D. But given the error message at [14], I
thought [12] would have been allowed. What is the proper way to convert
[8] to D?
Thanks
Re: Initializing a class pointer
On 2/27/2011 8:10 AM, Simen kjaeraas wrote:
Tyro[a.c.edwards] wrote:
class Class{}
void main()
{
Class myClass;
Class* pClass0 = &myClass; // OK
Class* pClass1 = new Class; // Error: cannot implicitly convert [8]
// expression (new Class) of type t.Class
// to test.Class*
Class* pClass2 = &(new Class);
// Error: new Class is not an lvalue [12]
Class mClass = &(new Class);// Error: cannot implicitly convert [14]
// expression (&new Class) of type Class*
// to test.Class
}
C++ uses the process on line [8] above to initialize a class pointer.
Obviously it does not work in D. But given the error message at [14],
I thought [12] would have been allowed. What is the proper way to
convert [8] to D?
Classes in D are already references (like Class& in C++), thus line [8]
would be a pointer to a reference to a class, something which may make
some kind of sense, but is unlikely to be what you want.
Perhaps this question is better answered if you explain why you want a
pointer to a class?
I'm trying to convert some c++ code that defines
T func(par...)
{
Controller * pCtrl = WinGetLong (hwnd);
.
.
.
switch(msg)
{
case FirstMatch:
pCtrl = new Controller (hwnd, reinterpret_cast
(lParam));
break;
}
}
I'm not sure why I need a pointer to the class, just trying to figure it
out.
Re: Initializing a class pointer
On 2/27/2011 8:52 AM, Simen kjaeraas wrote:
Tyro[a.c.edwards] wrote:
I'm trying to convert some c++ code that defines
T func(par...)
{
Controller * pCtrl = WinGetLong (hwnd);
.
.
.
switch(msg)
{
case FirstMatch:
pCtrl = new Controller (hwnd, reinterpret_cast (lParam));
break;
}
}
I'm not sure why I need a pointer to the class, just trying to figure
it out.
Ah. You would not need a pointer to the class in D. Instead, your function
would look something like this:
T funct(par...)
{
auto pCtrl = WinGetLong!Controller(hwnd);
...
switch(msg)
{
case FirstMatch:
pCtrl = new Controller(hWnd, cast(CREATESTRUCT*)lParam);
break;
}
}
C++ classes are in some ways more akin to D structs, in that:
class A {};
void foo(){
A bar;
}
bar would be allocated on the stack in C++, while in D bar would be a
pointer to a class instance on the heap. (well, it would be null, but
when you set it to something, that something would reside on the heap)
Ok, that's essentially what I have, except that I used Controller pCtrl
vice auto. WinGetLong however, is a template that calls
GetWindowLongPtrA() and casts it's result (in this case) to Controller.
GetWindowLongPtrA() returns LONG_PTR (aka int) and therefore fails
miserably on the cast attempt. On the reverse, there is a WinSetLong
that attempts to cast Controller to int for use with
SetWindowLongPtrA(). Neither of these functions complain when I use
Controller* but I end up with the problem of trying to initialize a
pointer with a reference to Controller.
Re: Initializing a class pointer
On 2/27/2011 9:46 AM, Tyro[a.c.edwards] wrote:
On 2/27/2011 8:52 AM, Simen kjaeraas wrote:
Tyro[a.c.edwards] wrote:
I'm trying to convert some c++ code that defines
T func(par...)
{
Controller * pCtrl = WinGetLong (hwnd);
.
.
.
switch(msg)
{
case FirstMatch:
pCtrl = new Controller (hwnd, reinterpret_cast
(lParam));
break;
}
}
I'm not sure why I need a pointer to the class, just trying to figure
it out.
Ah. You would not need a pointer to the class in D. Instead, your
function
would look something like this:
T funct(par...)
{
auto pCtrl = WinGetLong!Controller(hwnd);
...
switch(msg)
{
case FirstMatch:
pCtrl = new Controller(hWnd, cast(CREATESTRUCT*)lParam);
break;
}
}
C++ classes are in some ways more akin to D structs, in that:
class A {};
void foo(){
A bar;
}
bar would be allocated on the stack in C++, while in D bar would be a
pointer to a class instance on the heap. (well, it would be null, but
when you set it to something, that something would reside on the heap)
Ok, that's essentially what I have, except that I used Controller pCtrl
vice auto. WinGetLong however, is a template that calls
GetWindowLongPtrA() and casts it's result (in this case) to Controller.
GetWindowLongPtrA() returns LONG_PTR (aka int) and therefore fails
miserably on the cast attempt. On the reverse, there is a WinSetLong
that attempts to cast Controller to int for use with
SetWindowLongPtrA(). Neither of these functions complain when I use
Controller* but I end up with the problem of trying to initialize a
pointer with a reference to Controller.
By the way, in original C++ code WinGetLong and WinSetLong are both
using a reinterpret_cast to achieve this monkey magic. To the best of my
knowledge, there is no reinterpret_cast facility in D. So the question
would be, why would it have been necessary to use reinterpret_cast in
the first place and how can similar effect be obtained in D? What was
being reinterpreted? Was it the address of the class or the value some
private value contained therein?
Re: Initializing a class pointer
On 2/27/2011 10:39 PM, Steven Schveighoffer wrote:
On Sat, 26 Feb 2011 19:46:18 -0500, Tyro[a.c.edwards]
wrote:
On 2/27/2011 8:52 AM, Simen kjaeraas wrote:
Tyro[a.c.edwards] wrote:
I'm trying to convert some c++ code that defines
T func(par...)
{
Controller * pCtrl = WinGetLong (hwnd);
.
.
.
switch(msg)
{
case FirstMatch:
pCtrl = new Controller (hwnd, reinterpret_cast
(lParam));
break;
}
}
I'm not sure why I need a pointer to the class, just trying to figure
it out.
Ah. You would not need a pointer to the class in D. Instead, your
function
would look something like this:
T funct(par...)
{
auto pCtrl = WinGetLong!Controller(hwnd);
...
switch(msg)
{
case FirstMatch:
pCtrl = new Controller(hWnd, cast(CREATESTRUCT*)lParam);
break;
}
}
C++ classes are in some ways more akin to D structs, in that:
class A {};
void foo(){
A bar;
}
bar would be allocated on the stack in C++, while in D bar would be a
pointer to a class instance on the heap. (well, it would be null, but
when you set it to something, that something would reside on the heap)
Ok, that's essentially what I have, except that I used Controller
pCtrl vice auto. WinGetLong however, is a template that calls
GetWindowLongPtrA() and casts it's result (in this case) to
Controller. GetWindowLongPtrA() returns LONG_PTR (aka int) and
therefore fails miserably on the cast attempt. On the reverse, there
is a WinSetLong that attempts to cast Controller to int for use with
SetWindowLongPtrA(). Neither of these functions complain when I use
Controller* but I end up with the problem of trying to initialize a
pointer with a reference to Controller.
You almost certainly do not want a pointer to a class reference. A class
typically resides on the heap, but the reference typically does not.
Therefore, by using a pointer to a class reference, you run very high
risk of escaping stack data, leading to memory corruption.
Looking at the documentation for GetWindowLongPtr, it appears to get
data associated with a window. Likely, this information is the a pointer
to the Controller class.
I would recommend doing this:
T WinGetLong(T)(HWND hwnd)
{
return cast(T)cast(void*)GetWindowLongPtrA(hwnd, ...);
}
and
void WinSetLong(T)(HWND hwnd, T t)
{
SetWindowLongPtrA(hwnd, ..., cast(LONG_PTR)cast(void*)t);
}
where the ... is the index copied from the C++ code (guessing it's
GWLP_USERDATA?).
btw, reinterpret_cast(x) is equivalent to (T)(void *)x;
-Steve
Thank you all (Steve, Bekenn, and Simen) for your assistance on this.
string vs. w/char*
The bellow code attempts to use LoadStringA() to initialize _buf.
However, regardless of what form _buf takes, the body of the if
statement is always executed. I've attempted to use every type of string
available in D to include char* _buf[MAX_RESSTRING+1] and setting
_buf[MAX_RESSTRING] = '\0'; What am I doing incorrectly?
Any assistance is greatly appreciated.
class ResString
{
enum { MAX_RESSTRING = 255 }
alias getBuffer this;
@property string getBuffer() { return _buf; }
this(HINSTANCE hInst, int resId)
{
_buf.length = MAX_RESSTRING;
SetLastError(0);
if(!LoadStringA(hInst, resId, cast(char*)toStringz(_buf),
_buf.length + 1))
{
throw new WinException("Load String failed");
}
}
private:
string _buf;
}
Re: string vs. w/char*
On 2/28/2011 9:58 PM, Steven Schveighoffer wrote:
On Mon, 28 Feb 2011 07:34:39 -0500, Tyro[a.c.edwards]
wrote:
The bellow code attempts to use LoadStringA() to initialize _buf.
However, regardless of what form _buf takes, the body of the if
statement is always executed. I've attempted to use every type of
string available in D to include char* _buf[MAX_RESSTRING+1] and
setting _buf[MAX_RESSTRING] = '\0'; What am I doing incorrectly?
Any assistance is greatly appreciated.
class ResString
{
enum { MAX_RESSTRING = 255 }
alias getBuffer this;
@property string getBuffer() { return _buf; }
this(HINSTANCE hInst, int resId)
{
_buf.length = MAX_RESSTRING;
SetLastError(0);
if(!LoadStringA(hInst, resId, cast(char*)toStringz(_buf), _buf.length
+ 1))
{
throw new WinException("Load String failed");
}
}
private:
string _buf;
}
You should not be overwriting buf, it is immutable. You need to make a
new buffer each time.
this(HINSTANCE hInst, int resId)
{
auto mybuf = new char[MAX_RESSTRING];
auto nchars = LoadStringA(hInst, resId, mybuf.ptr, mybuf.length);
if(!nchars)
{
throw new WinException("Load String failed");
}
_buf = assumeUnique(mybuf[0..nchars]);
SetLastError(0);
}
If this isn't working, you might consider that the string you are trying
to load doesn't actually exist (that is a valid condition). What is the
error from GetLastError ?
-Steve
Both implementations results in error code 1812 being returned from
GetLastError. explanation of the code reads:
ERROR_RESOURCE_DATA_NOT_FOUND
1812 (0x714)
The specified image file did not contain a resource section.
The code I'm porting initially consisted of a resource.h file, a
generic.rc file and two icons. I have not tried to include the icons and
generic.rc file in the compilation because I do not know how to as yet
and I've only used half of the resource.h file: didn't think I need the
whole thing. Could this be the reason for the error? If so could you
direct me to the explanation of how to prepare these files for inclusion
in the compilation process?
Thanks,
Andrew
Re: string vs. w/char*
On 2/28/2011 11:08 PM, J Chapman wrote:
== Quote from Tyro[a.c.edwards] (nos...@home.com)'s article
Both implementations results in error code 1812 being returned from
GetLastError. explanation of the code reads:
ERROR_RESOURCE_DATA_NOT_FOUND
1812 (0x714)
The specified image file did not contain a resource section.
The code I'm porting initially consisted of a resource.h file, a
generic.rc file and two icons. I have not tried to include the icons and
generic.rc file in the compilation because I do not know how to as yet
and I've only used half of the resource.h file: didn't think I need the
whole thing. Could this be the reason for the error? If so could you
direct me to the explanation of how to prepare these files for inclusion
in the compilation process?
Thanks,
Andrew
You need to compile the .rc file (see
http://www.digitalmars.com/ctg/rcc.html), then add the resulting .res file
to dmd's command line.
Awesome, this does the trick. However I get get a "GP Fault"? during
execution. Using windbg, I tracked it down to this piece of code:
void Create()
{
_hwnd = CreateWindowExA(
_exStyle,
cast(const(char*))_wc.GetName(), // returns string
cast(const(char*))_windowName, // string variable
_style,
_x,
_y,
_width,
_height,
_hWndParent,
_hMenu,
_wc.GetInstance(),
_data);
assert(_hwnd, "Internal error: Window Creation Failed.");
}
The program craps at assert() but the error is generated. It just
displays a dialog box with the message: "test.exe has stopped working,
Windows is checking for a solution to the problem..."
I'm thinking that _hwnd was never initialized and that assert is access
a null pointer but I cannot be sure. Any suggestions or ideas?
Re: string vs. w/char*
== Quote from Denis Koroskin (2kor...@gmail.com)'s article
> On Mon, 28 Feb 2011 19:35:47 +0300, Tyro[a.c.edwards]
> wrote:
> > On 2/28/2011 11:08 PM, J Chapman wrote:
> >> == Quote from Tyro[a.c.edwards] (nos...@home.com)'s article
> >>> Both implementations results in error code 1812 being
returned from
> >>> GetLastError. explanation of the code reads:
> >>>ERROR_RESOURCE_DATA_NOT_FOUND
> >>>1812 (0x714)
> >>>The specified image file did not contain a resource
section.
> >>> The code I'm porting initially consisted of a resource.h
file, a
> >>> generic.rc file and two icons. I have not tried to include
the icons
> >>> and
> >>> generic.rc file in the compilation because I do not know how
to as yet
> >>> and I've only used half of the resource.h file: didn't think
I need the
> >>> whole thing. Could this be the reason for the error? If so
could you
> >>> direct me to the explanation of how to prepare these files
for
> >>> inclusion
> >>> in the compilation process?
> >>> Thanks,
> >>> Andrew
> >>
> >> You need to compile the .rc file (see
> >> http://www.digitalmars.com/ctg/rcc.html), then add the
resulting .res
> >> file
> >> to dmd's command line.
> >
> > Awesome, this does the trick. However I get get a "GP Fault"?
during
> > execution. Using windbg, I tracked it down to this piece of
code:
> >
> > void Create()
> > {
> >_hwnd = CreateWindowExA(
> > _exStyle,
> > cast(const(char*))_wc.GetName(), // returns string
> > cast(const(char*))_windowName, // string variable
> > _style,
> > _x,
> > _y,
> > _width,
> > _height,
> > _hWndParent,
> > _hMenu,
> > _wc.GetInstance(),
> > _data);
> >
> > assert(_hwnd, "Internal error: Window Creation Failed.");
> > }
> >
> > The program craps at assert() but the error is generated. It
just
> > displays a dialog box with the message: "test.exe has stopped
working,
> > Windows is checking for a solution to the problem..."
> >
> > I'm thinking that _hwnd was never initialized and that assert
is access
> > a null pointer but I cannot be sure. Any suggestions or ideas?
> The
> > cast(const(char*))_wc.GetName()
> line look *very* suspicious. You can't get a string and just
cast it to
> const(char)*. Most importantly, the string (most likely) is not
> null-terminated.
> What you need to do here is the following:
> auto className = toStringz(_ws.GetName());
> auto caption = toStringz(_windowName);
> and pass those 2 to the function.
Actually I've already tried that, it has no effect on the outcome.
>From your suggestion though, I've gone back and replace all the
cast(const(char*)) usage throughout the program. Final verdict:
the program still crashes it the same location. It actually never
returns from CreateWindowExA().
> Alternatively, you could make sure your strings are null-
terminated and
> pass the pointer directly (e.g. _windowName.ptr):
> string _windowName = "foo"; // null-terminated automatically
> string _caption = ("Hello, World" ~ "\0")[0..$-1]; // append
trailing zero
> to an existing string but exclude it from result (so that it's
not
> included in _caption.length)
Re: string vs. w/char*
== Quote from Denis Koroskin (2kor...@gmail.com)'s article
> On Tue, 01 Mar 2011 02:08:48 +0300, Tyro[a.c.edwards]
> wrote:
> > == Quote from Denis Koroskin (2kor...@gmail.com)'s article
> >> On Mon, 28 Feb 2011 19:35:47 +0300, Tyro[a.c.edwards]
> >
> >> wrote:
> >> > On 2/28/2011 11:08 PM, J Chapman wrote:
> >> >> == Quote from Tyro[a.c.edwards] (nos...@home.com)'s article
> >> >>> Both implementations results in error code 1812 being
> > returned from
> >> >>> GetLastError. explanation of the code reads:
> >> >>>ERROR_RESOURCE_DATA_NOT_FOUND
> >> >>>1812 (0x714)
> >> >>>The specified image file did not contain a resource
> > section.
> >> >>> The code I'm porting initially consisted of a resource.h
> > file, a
> >> >>> generic.rc file and two icons. I have not tried to include
> > the icons
> >> >>> and
> >> >>> generic.rc file in the compilation because I do not know
how
> > to as yet
> >> >>> and I've only used half of the resource.h file: didn't
think
> > I need the
> >> >>> whole thing. Could this be the reason for the error? If so
> > could you
> >> >>> direct me to the explanation of how to prepare these files
> > for
> >> >>> inclusion
> >> >>> in the compilation process?
> >> >>> Thanks,
> >> >>> Andrew
> >> >>
> >> >> You need to compile the .rc file (see
> >> >> http://www.digitalmars.com/ctg/rcc.html), then add the
> > resulting .res
> >> >> file
> >> >> to dmd's command line.
> >> >
> >> > Awesome, this does the trick. However I get get a "GP
Fault"?
> > during
> >> > execution. Using windbg, I tracked it down to this piece of
> > code:
> >> >
> >> > void Create()
> >> > {
> >> >_hwnd = CreateWindowExA(
> >> > _exStyle,
> >> > cast(const(char*))_wc.GetName(), // returns string
> >> > cast(const(char*))_windowName, // string variable
> >> > _style,
> >> > _x,
> >> > _y,
> >> > _width,
> >> > _height,
> >> > _hWndParent,
> >> > _hMenu,
> >> > _wc.GetInstance(),
> >> > _data);
> >> >
> >> > assert(_hwnd, "Internal error: Window Creation
Failed.");
> >> > }
> >> >
> >> > The program craps at assert() but the error is generated. It
> > just
> >> > displays a dialog box with the message: "test.exe has
stopped
> > working,
> >> > Windows is checking for a solution to the problem..."
> >> >
> >> > I'm thinking that _hwnd was never initialized and that
assert
> > is access
> >> > a null pointer but I cannot be sure. Any suggestions or
ideas?
> >> The
> >> > cast(const(char*))_wc.GetName()
> >> line look *very* suspicious. You can't get a string and just
> > cast it to
> >> const(char)*. Most importantly, the string (most likely) is
not
> >> null-terminated.
> >> What you need to do here is the following:
> >> auto className = toStringz(_ws.GetName());
> >> auto caption = toStringz(_windowName);
> >> and pass those 2 to the function.
> >
> > Actually I've already tried that, it has no effect on the
outcome.
> > From your suggestion though, I've gone back and replace all the
> > cast(const(char*)) usage throughout the program. Final verdict:
> > the program still crashes it the same location. It actually
never
> > returns from CreateWindowExA().
> >
> >> Alternatively, you could make sure your strings are null-
> > terminated and
> >> pass the pointer directly (e.g. _windowName.ptr):
> >> string _windowName = "foo"; // null-terminated automatically
> >> string _caption = ("Hello, World" ~ "\0")[0..$-1]; // append
> > trailing zero
> >> to an existing string but exclude it from result (so that it's
> > not
> >> included in _caption.length)
> >
> This is indeed strange, but it has nothing to do with the
function itself.
> I still think the parameters you are passing might be invalid.
Try setting
> them to default values and see if that helps. Also try wrapping
the call
> with a try/catch block and output an exception you are getting
(if any).
The problem occurs at the site of the assertion. I wrapped the
function in a try/catch block and placed a call to MessageBoxA()
on either end of the the try block. Both calls to MessageBox fires
and the appropriate messages displayed. No exception is thrown:
made evident my the fact that the third call to MessageBox,
embeded in catch{}, is not fired. Nevertheless, execution haults
at the very next line following/catch and Create() never returns.
Re: string vs. w/char*
On 3/1/2011 7:18 PM, Bekenn wrote: On 3/1/2011 12:25 AM, Tyro[a.c.edwards] wrote: Nevertheless, execution haults at the very next line following/catch and Create() never returns. CreateWindow sends a few messages to your window proc; anything interesting happening there? Not sure how to check those messages, but I guess that's a cue for me to do some more research. Off to Google land I go...
Re: string vs. w/char*
On 3/1/2011 8:25 PM, Tyro[a.c.edwards] wrote:
On 3/1/2011 7:18 PM, Bekenn wrote:
On 3/1/2011 12:25 AM, Tyro[a.c.edwards] wrote:
Nevertheless, execution haults
at the very next line following/catch and Create() never returns.
CreateWindow sends a few messages to your window proc; anything
interesting happening there?
Not sure how to check those messages, but I guess that's a cue for me to
do some more research. Off to Google land I go...
After much searching, I've finally located the actual cause of the problem:
class TopWinClass: WinClass
{
this(ushort resId, HINSTANCE hInst, WNDPROC wndProc)
{
super(resId, hInst, wndProc);
SetResIcons(resId);
wc.lpszMenuName = MAKEINTRESOURCEA(resId); // [PROBLEM]
}
}
The root cause of the problem begins with a lack of understanding of how
to create a proper resource file for D. I simply took the C++ version,
compiled it with rcc and linked it to my project: No changes whatsoever.
Turn out that made the compiler/linker stop complaining, however
MAKEINTRESOURCEA(resId) still cannot locate the correct resources or
cannot properly use the resource it finds to initialize wc.lpszMenuName.
Every access to wc.lpszMenuName after this point fails. If initialize
wc.lpszMenuName with one of the default strings, say "STATIC" at this
point, the program runs to completion. I've attached the resource file,
it hopes that someone could help me with it's conversion.
Thanks.
//Microsoft Developer Studio generated resource script.
//
#include "resource.h"
#define APSTUDIO_READONLY_SYMBOLS
/
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include
/
#undef APSTUDIO_READONLY_SYMBOLS
/
// English (U.S.) resources
#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
#pragma code_page(1252)
#endif //_WIN32
/
//
// Dialog
//
IDD_ABOUT DIALOG DISCARDABLE 20, 20, 145, 82
STYLE DS_MODALFRAME | WS_POPUP | WS_VISIBLE
FONT 8, "MS Sans Serif"
BEGIN
DEFPUSHBUTTON "OK",IDOK,47,62,50,14,WS_GROUP
ICONID_RS,IDC_RS,7,7,20,20,WS_GROUP
CTEXT "Generic",IDC_STATIC,51,17,42,11
CTEXT "(c) Reliable Software 1997, 98",IDC_STATIC,19,30,103,11
CTEXT "http://www.relisoft.com",IDC_STATIC,7,47,130,10
END
#ifdef APSTUDIO_INVOKED
/
//
// TEXTINCLUDE
//
1 TEXTINCLUDE DISCARDABLE
BEGIN
"resource.h\0"
END
2 TEXTINCLUDE DISCARDABLE
BEGIN
"#include \r\n"
"\0"
END
3 TEXTINCLUDE DISCARDABLE
BEGIN
"\r\n"
"\0"
END
#endif// APSTUDIO_INVOKED
/
//
// Icon
//
// Icon with lowest ID value placed first to ensure application icon
// remains consistent on all systems.
ID_MAIN ICONDISCARDABLE "generic.ico"
ID_RS ICONDISCARDABLE "rs.ico"
/
//
// Menu
//
ID_MAIN MENU DISCARDABLE
BEGIN
POPUP "&Program"
BEGIN
MENUITEM "&About...", IDM_ABOUT
MENUITEM SEPARATOR
MENUITEM "E&xit", IDM_EXIT
END
POPUP "&Help", HELP
BEGIN
MENUITEM "&Please", IDM_HELP
END
END
/
//
// String Table
//
STRINGTABLE DISCARDABLE
BEGIN
ID_MAIN "GenericClass"
ID_CAPTION "Generic Windows Program"
END
#endif// English (U.S.) resources
/
#ifndef APSTUDIO_INVOKED
/
//
// Generated from the TEXTINCLUDE 3 resource.
//
/
#endif// not APSTUDIO_INVOKED
Re: Want to help DMD bugfixing? Write a simple utility.
Not very elegant but this should get the job done:
000 module strip;
001 import std.algoritm : countUntil;
002 import std.array: strip;
003 import std.file : read;
004 import std.string : splitlines;
005 import std.stdio: writeln;
006
007 void main(string[] args)
008 {
009 bool start = false;
010 bool end = false;
011
012 bool comment = false;
013 bool nested = false;
014
015 int lBrace, rBrace;
016
017 auto f = cast(char[]) read(args[1]);
018 auto file = splitlines(f);
019
020 foreach(ref ndx, line; file)
021 {
022 if(countUntil(strip(line), "//") == 0)
023 {
024 continue;
025 }
026
027 if(!comment && countUntil(line, "/+", != -1)
028 {
029 nested = true;
030
031 if(countUntil(line, "+/") != -1)
032 nested = false;
033
034 continue;
035 }
036
037 while(nested)
038 {
039 if(countUntil(file[ndx], "+/") != -1)
040 {
041 nested = false;
042 end = true;
043 goto endTest;
044 }
045 ndx++;
046 }
047
048 if(!nested && countUntil(line, "/*", != -1)
049 {
050 comment = true;
051
052 if(countUntil(line, "*/") != -1)
053 comment = false;
054
055 continue;
056 }
057
058 while(comment)
059 {
060 if(countUntil(file[ndx], "*/") != -1)
061 {
062 comment = false;
063 end = true;
064 goto endTest;
065 }
066 ndx++;
067 }
068
069 if(!end && countUntil(line, "unittest") != -1)
070 {
071 start = true;
072 }
073
074 if(!nested && start)
075 {
076 if(countUntil(line, "{") != -1)
077 {
078 lBrace++;
079 }
080
081 if(countUntil(line, "}") != -1)
082 {
083 rBrace++;
084 if(rBrace > 0 && lBrace == rBrace)
085 {
086 end = true;
087 lBrace = rBrace = 0;
088 }
089 }
090 }
091
092 if(!start)
093 writeln(line);
094
095 endTest:;
096 if(end)
097 {
098 start = false;
099 end = false;
100 }
101 }
102 }
cheers.
Re: Want to help DMD bugfixing? Write a simple utility.
The following patch addresses the following issues:
1) fixed improper handling of nested and multiline comments that
do not take up a complete line.
2) eliminate extra blank lines where unit tests and comments are
removed.
Replace lines 31 & 32 with:
# auto n = countUntil(line, "+/");
# if(n != -1 && n < line.lenght - 2)
# {
# nested = false;
# goto output;
# }
Replace lines 52 & 53 with:
# auto n = countUntil(line, "*/");
# if(n != -1 && n < line.lenght - 2)
# {
# comment = false;
# goto output;
# }
Replace lines 92 - 100 with;
# output:;
# if(!start)
# {
# if(line.length == 0 && !blankLine)
# {
# blankLine = true;
# writeln(line);
# }
# else if(line.length == 0 && blankLine)
# {
# goto endTest;
# }
#
# endTest:;
# if(end)
# {
# start = false;
# end = false;
# blankLine = true;
# }
# }
Re: Want to help DMD bugfixing? Write a simple utility.
Messed that up again: see embeded change. Wish I could just copy
and pase but that's not possible with my current setup.
== Quote from Tyro[a.c.edwards] (nos...@home.com)'s article
> The following patch addresses the following issues:
> 1) fixed improper handling of nested and multiline comments that
> do not take up a complete line.
> 2) eliminate extra blank lines where unit tests and comments are
> removed.
> Replace lines 31 & 32 with:
> # auto n = countUntil(line, "+/");
> # if(n != -1 && n < line.lenght - 2)
> # {
> # nested = false;
> # goto output;
> # }
> Replace lines 52 & 53 with:
> # auto n = countUntil(line, "*/");
> # if(n != -1 && n < line.lenght - 2)
> # {
> # comment = false;
> # goto output;
> # }
> Replace lines 92 - 100 with;
> # output:;
> # if(!start)
> # {
> # if(line.length == 0 && !blankLine)
> # {
> # blankLine = true;
> # writeln(line);
> # }
> # else if(line.length == 0 && blankLine)
> # {
> # goto endTest;
> # }
#else
#{
#writeln(line);
#}
> #
> # endTest:;
> # if(end)
> # {
> # start = false;
> # end = false;
> # blankLine = true;
> # }
> # }
Re: template instance cannot use local 'f' as parameter to non-global template
On 7/13/2011 11:35 PM, Trass3r wrote:
Am 13.07.2011, 16:02 Uhr, schrieb Steven Schveighoffer
:
void h() {}
class Bla
{
mixin wrap!h;
}
mixin template wrap(alias f)
{
void blub(alias g = f)()
{
g();
}
}
As a workaround, is there a reason you need blub to be parameterized?
I mean, f is already part of the template.
Yep, a default function is passed to wrap and in most cases blub just
calls that one.
But sometimes I need blub to use a function other than the default one.
Don't know it this is the right answer or a possible bug but it does the
trick:
void h() { import std.stdio; write("h()"); }
class Bla
{
mixin wrap!h;
}
mixin template wrap(alias f)
{
void blub(typeof(&f) g = &f)
{
g();
}
}
void main()
{
Bla b = new Bla();
b.blub();
}
Re: template instance cannot use local 'f' as parameter to non-global template
On 7/14/2011 12:24 AM, Trass3r wrote:
Am 13.07.2011, 16:58 Uhr, schrieb Tyro[a.c.edwards] :
Don't know it this is the right answer or a possible bug but it does
the trick:
void h() { import std.stdio; write("h()"); }
class Bla
{
mixin wrap!h;
}
mixin template wrap(alias f)
{
void blub(typeof(&f) g = &f)
{
g();
}
}
void main()
{
Bla b = new Bla();
b.blub();
}
Thanks!
Unfortunately it doesn't work with more complex functions:
Error: arithmetic/string type expected for value-parameter, not
cl_errcode C function(cl_program program, uint param_name, ulong
param_value_size, void* param_value, ulong* param_value_size_ret)
I gusss the simplest example of the problem you're experiencing would be
this:
void h() { import std.stdio; write("h()"); }
void function() fp = &h;
class Bla
{
mixin wrap!(fp);
}
mixin template wrap(alias f)
{
void blub()
{
typeof(&f) g = &f;
g(); // <--- source of error [1]
}
}
void main()
{
Bla b = new Bla();
b.blub();
}
edit1.d(19): Error: function expected before (), not g of type uint* C
function()*
[1] Here you are calling a function pointer which simply returns the
address of the function... hence your error!
Try calling the function (differencing the pointer as such: (*g)()) and
your problem is solved.
Re: template instance cannot use local 'f' as parameter to non-global template
On 7/14/2011 12:24 AM, Trass3r wrote:
Am 13.07.2011, 16:58 Uhr, schrieb Tyro[a.c.edwards] :
Don't know it this is the right answer or a possible bug but it does
the trick:
void h() { import std.stdio; write("h()"); }
class Bla
{
mixin wrap!h;
}
mixin template wrap(alias f)
{
void blub(typeof(&f) g = &f)
{
g();
}
}
void main()
{
Bla b = new Bla();
b.blub();
}
Thanks!
Unfortunately it doesn't work with more complex functions:
Error: arithmetic/string type expected for value-parameter, not
cl_errcode C function(cl_program program, uint param_name, ulong
param_value_size, void* param_value, ulong* param_value_size_ret)
I guess the simplest example of the problem you're experiencing would be
this:
void h() { import std.stdio; write("h()"); }
void function() fp = &h;
class Bla
{
mixin wrap!(fp);
}
mixin template wrap(alias f)
{
void blub()
{
typeof(&f) g = &f;
g(); // <--- source of error [1]
}
}
void main()
{
Bla b = new Bla();
b.blub();
}
edit1.d(19): Error: function expected before (), not g of type void
function()*
[1] Here you are calling a function pointer which simply returns the
address of the function... hence your error!
Try calling the function pointed to by differencing the pointer as such:
(*g)() and your problem is solved.
How does one correct shadowing (hidden by) errors?
While attempting to build the DFL libraries, I encountered the following
three errors:
[1] tabcontrol.d(18): Error: class dfl.tabcontrol.TabPage use of
dfl.control.Control.opEquals(Control ctrl) hidden by TabPage is deprecated
[2] tabcontrol.d(18): Error: class dfl.tabcontrol.TabPage use of
dfl.control.Control.opCmp(Control ctrl) hidden by TabPage is deprecated
[3] imagelist.d(22): Error: class
dfl.imagelist.ImageList.ImageCollection use of
dfl.imagelist.ImageList.ImageCollection.ListWrapArray!(Image,_images,_adding,_added,_blankListCallback,_removed,false,false,false).insert(int
index, Image value) hidden by ImageCollection is deprecated
Now I know I can bypass this with the -d switch but I'm more interested
in fixing the problem than bypassing it.
Control defines the following two functions:
override Dequ opEquals(Object o)
{
Control ctrl = cast(Control)o;
if(!ctrl)
return 0; // Not equal.
return opEquals(ctrl);
}
override int opCmp(Object o)
{
Control ctrl = cast(Control)o;
if(!ctrl)
return -1;
return opCmp(ctrl);
}
Whereas TabPage defines the following:
override Dequ opEquals(Object o)
{
return text == getObjectString(o);
}
override int opCmp(Object o)
{
return stringICmp(text, getObjectString(o));
}
How does one correct this such that the latter does not hide the first?
Problem [3] on the other hand is caused by a template mixin in the
dfl.imagelist.ImageList.ImageCollection. ImageCollection is not a
derived class so I do not understand what is being hidden. Please
explain. Also, a suggestion on how to correct the issue would be
helpful. The code is as follows:
class ImageList
{
class ImageCollection
{
...
public:
mixin ListWrapArray!(Image, _images,
_adding, _added,
_blankListCallback!(Image), _removed,
false, false, false);
}
...
}
Thanks
Re: How does one correct shadowing (hidden by) errors?
On 7/23/2011 7:49 PM, bearophile wrote:
Tyro[a.c.edwards]:
[3] imagelist.d(22): Error: class
dfl.imagelist.ImageList.ImageCollection use of
dfl.imagelist.ImageList.ImageCollection.ListWrapArray!(Image,_images,_adding,_added,_blankListCallback,_removed,false,false,false).insert(int
index, Image value) hidden by ImageCollection is deprecated
Now I know I can bypass this with the -d switch but I'm more interested
in fixing the problem than bypassing it.
There is a trick based on explicit alias to avoid those errors. I'd like the
idea of using this alias to be present in that error message...
Bye,
bearophile
Please do share. I thought the concept explicit alias simply requires me
to do his:
alias ListWrapArray LWA;
mixin LWA!(Image, _images,
_adding, _added,
_blankListCallback!(Image), _removed,
false, false, false);
This did not work... resulted in the same error. On closer look it seems
the actual problem is not the template but the definition of "insert"
therein. It is being hidden by the definition of insert in ImageCollection.
ImageCollection definition:
void insert(int index, Image img)
{
if(index >= _images.length)
{
add(img);
}
else
{
assert(0, "Must add images to the end of the image
list");
}
}
ListWrapArray definition:
void insert(int index, TValue value)
{
_insert(index, value);
}
In the end it turns out to be the same problem as one and two. Any
suggestion on how to deal with these correctly? I can resolve this
particular error by renaming the function to "Insert" in
ImageCollection. But even though it appeases the compiler, is that the
correct solution? Is there something else that I'm not taking into
consideration? How do I fix the other two since there is no way to
rename opApply and opCmp that I'm aware of?
Thanks
Compiling DMD on MAC OS X
Hi all, I've just installed DMD 2.058 and attempted to compile a little script but was greeted with the following error: gcc: Invalid argument I used the .dmg installer from http://www.dlang.org/download.html and issued the command: dmd average Is there something I'm missing? Thanks, Andrew
Re: Compiling DMD on MAC OS X
On Sunday, 19 February 2012 at 11:39:15 UTC, kraybourne wrote:
On 2/19/12 09:20 , Tyro[a.c.edwards] wrote:
Hi all,
I've just installed DMD 2.058 and attempted to compile a
little script
but was greeted with the following error:
gcc: Invalid argument
I used the .dmg installer from
http://www.dlang.org/download.html and
issued the command:
dmd average
Is there something I'm missing?
Thanks,
Andrew
Hi!
Could you try
dmd -v avarage
and tell us what comes out?
Also, how does avarage.d look? Also what does
uname -a
and
gcc --version
say? Also, just in case
which dmd
I made the mistake of assuming that gcc was automatically
installed in MAC OSX. After installing Xcode the problem went
away. To answer your questions though:
I'm using DMD version 2.058 for MAC OSX which I installed using
the .dmg package available at
"http://www.dlang.org/download.html";.
"gcc --version" yields:
i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc.
build 5658) (LLVM build 2336.9.00)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
"uname -a" yields:
Darwin Andrews-MacBook-Pro.local 11.3.0 Darwin Kernel Version
11.3.0: Thu Jan 12 18:47:41 PST 2012;
root:xnu-1699.24.23~1/RELEASE_X86_64 x86_64
the average program is as follows:
[code]
import std.stdio: stdin, writefln;
import std.conv: to;
void main(string[] args)
{
double sum = 0.0;
int cnt = 0;
foreach(line; stdin.byLine())
{
if(line.length)
{
sum += to!double (line);
cnt++;
}
}
double avg = sum / cnt;
writefln("Average is %.5f", avg);
}
[/code]
and I doubt you want me to put all of what "dmd -v" spits out for
this little script.
Thanks,
Andrew
ftp connection with socket
Hi, I hoping someone could whip up an example of how to check if it's possible to connect to a given site: eg. ftp.digitalmars.com and display a message if unsuccessful. If one is already available, could someone please point me to it? Thanks, Andrew
Re: ftp connection with socket
Per Jarrett Billingsley's advice, the following is provided: I am using DMD v2.028 w/Phobos 2 Thanks again. Tyro[a.c.edwards] Wrote: > Hi, > > I hoping someone could whip up an example of how to check if it's possible to > connect to a given site: eg. ftp.digitalmars.com and display a message if > unsuccessful. If one is already available, could someone please point me to > it? > > Thanks, > Andrew
Re: When asking for help on how to do something...
Jarrett Billingsley Wrote: > Please, *please* indicate whether you are using Phobos 1, Phobos 2, or Tango. > > It's hard enough trying to read your mind about what you're trying to > do. It's even harder when there are two or three completely different > solutions to it. Jarrett, I've always used the most recent version of DMD, and being that I only work on extremely short code to help me automate my job, I've always managed to stay on the bleeding edge (ie. 2.029 if it shows up two seconds after I send this response). The only other library I use is DFL so the thought has actually never crossed my mind. Thank you much for the guidance. I will be sure to provide that info in the future. R/S, Andrew
Re: When asking for help on how to do something...
Jarrett Billingsley Wrote: > Please, *please* indicate whether you are using Phobos 1, Phobos 2, or Tango. > > It's hard enough trying to read your mind about what you're trying to > do. It's even harder when there are two or three completely different > solutions to it. Jarrett, I've always used the most recent version of DMD, and being that I only work on extremely short code to help me automate my job, I've always managed to stay on the bleeding edge (ie. 2.029 if it shows up two seconds after I send this response). The only other library I use is DFL so the thought has actually never crossed my mind. Thank you much for the guidance. I will be sure to provide that info in the future. R/S, Andrew
static initialization of associative arrays
Is it yet possible to statically initialize an associative array? If so, please point me to the documentation. I am using DMD v2.028. Thanks, Andrew
static initialization of associative arrays
Is it yet possible to statically initialize an associative array? If so,
please point me to the documentation. I am using DMD v2.028.
Currently I'm able to do this:
import std.stdio;
string[string] types;
static this(){
types = [ "void":"void", "bool":"bool" ];
}
void main(){
writeln(types);
}
Output = [void:void,bool:bool] which is exactly what I want.
However, removing static this() results in an error.
string[string] types = [ "void":"void", "bool":"bool" ];
Result:
api.d(77): Error: non-constant expression ["void":"void","bool":"bool"]
How do I make the initialization constant?
Thanks,
Andrew
std.range this._input.opIndex(index) error
Attempting to compile the following from snippet auto r = iota(0, 10, 1); assert(equal(r, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9][])); from the documentation, I encountered following error range.d(1184): Error: this._input.opIndex(index) is not an lvalue Looking at the code I find "return _input[index];" on line 1184. The variable _input is defined as R _input in the template Take(R) which is the template instantiated to create iota. Problem is, it is obvious why this doesn't work since the Range data variable "_input" is accessed the same way on multiple occasions throughout the file, a Range variable can obviously supports random access, and no attempt is being made to modify the range at this point in the code. Any information would be greatly appreciated? Thanks in advance, Andrew
std.range this._input.opIndex(index) error
Attempting to compile the following from snippet auto r = iota(0, 10, 1); assert(equal(r, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9][])); from the documentation, I encountered following error range.d(1184): Error: this._input.opIndex(index) is not an lvalue Looking at the code I find "return _input[index];" on line 1184. The variable _input is defined as R _input in the template Take(R) which is the template instantiated to create iota. Problem is, it is not obvious why this doesn't work since the Range data variable "_input" is accessed the same way on multiple occasions throughout the file, a Range variable can obviously supports random access, and no attempt is being made to modify the range at this point in the code. Any information would be greatly appreciated? Thanks in advance, Andrew
How to check for internet connectivity and download file?
I've used Burton Radons' "urllib" in the past to get download files from the internet, however the library has atrophied and can no longer be used with DMD v2.029 (not how long it's been this way because I haven't tried to compile it since 2006). I'm wondering if someone could point me to an example of how to check for internet connectivity and if available download the latest version of a given file. Thanks in advance. Andrew
Re: How to check for internet connectivity and download file?
Unknown W. Brackets Wrote: > Well, checking for internet connectivity is a tricky and > operating-specific thing. > > Would you rather check for connectivity with a specific host? I gather > that would be more than appropriate for what you're wanting. This should do just fine. Afterall it would do no good if I have connectivity but cannot reach the intended host. > Are you wanting to download over HTTP, or a different protocol? If over > HTTP, there are a ton of libraries that may be useful to you, and > there's also building your own HTTP request (which is actually pretty > trivial.) I'm trying to download over both FTP and HTTP. Not sure if the same process is applicable to both protocols but I'm assuming not. > If you're using Tango, it has classes in it for these things. Unfortunately I haven't played with Tango many years now and got away from D1 as soon D2 forked back in 2007. > -[Unknown] > > > Tyro[a.c.edwards] wrote: > > I've used Burton Radons' "urllib" in the past to get download files from > > the internet, however the library has atrophied and can no longer be used > > with DMD v2.029 (not how long it's been this way because I haven't tried to > > compile it since 2006). > > > > I'm wondering if someone could point me to an example of how to check for > > internet connectivity and if available download the latest version of a > > given file. > > > > Thanks in advance. > > Andrew
Re: How to check for internet connectivity and download file?
On 4/27/2009 5:14 PM, Unknown W. Brackets wrote: If you want both HTTP and FTP, it's definitely worth using a library for it. There are a lot of options, but almost all of them are out of date I suppose for 2.x... I've always hated curl, but you might look at how hard it is to get/make d headers for it. This might work fine for you. Apparently Kenneth Bogert did some work on curl a while back. cURL happens to host it on their site so I'll give it a shot. HTTP is relatively easy. You can see a sample in dmd/samples/d/htmlget.d. This isn't exactly a right example, because it completely ignores Transfer-Encoding, but if you search and replace HTTP/1.1 with HTTP/1.0, it should be usable although the check for is an ugly hack and 100% wrong. I'll take a look at it. I'm sure there is something there worth learning. FTP is more work. You have to send and receive commands, so it's slower. It's also worth maintaining state if you download more than one file from the same server. I have a library that does it, but unfortunately it's for 1.x. I'm planning to update it, but I won't be able to for a little while. I could explain what you need to do if you want to mess with the socket stuff... I'm virtually hopeless when it comes to these things so will happily accept assistance in whatever form I can get it. If you are willing to explain I will graciously accept the lesson. But again, it's complicated enough it's not a good idea to do it yourself imho unless you like reading RFCs (I do, but I'm a strange one.) Can't say I have much fondness for RFCs but over time that might change. As for being a strange one... well I'm as strange as they come so I will not be passing judgment anytime soon. -[Unknown]
How-to: input/output "Japanese Characters"?
I'm on a Japanese system attempting to input/output Japanese Characters and cannot seem to accomplish it. How would I read "憲法記念日 理念と現実、広がる格差" from stdin/file and output the same to stdout/file? Thanks, Andrew
Re: How-to: input/output "Japanese Characters"?
On 5/3/2009 7:41 AM, Georg Wrede wrote:
Tyro[a.c.edwards] wrote:
I'm on a Japanese system attempting to input/output Japanese Characters
and cannot seem to accomplish it. How would I read
"憲法記念日 理念と現実、広がる格差" from stdin/file and output the
same to stdout/file?
import std.stdio;
void main()
{
auto lin = readln();
writeln(lin);
}
Works with your Japanese strings. It just works(tm).
Interesting... for whatever reason I thought I had to cast/convert
to!dstring in order to get the correct output. Which kept resulting in:
std.utf.UtfException: 4invalid UTF-8 sequence
thank you very much.
Resource availability: fonts
One cannot necessarily rely on particular font being available on a system, and for security reasons asminsistrators restrict instalation of fonts (among other things) onto systems in a network. I would like to know if it is possible to embed a font into my code so that I know that it will always be there, or can I provide it with the exe but not have to rely on it being "installed" (i.e. use it from the same folder in which the exe resides)? Thanks, Andrew
Re: Resource availability: fonts
On 5/6/2009 12:30 PM, Daniel Keep wrote: Tyro[a.c.edwards] wrote: One cannot necessarily rely on particular font being available on a system, and for security reasons asminsistrators restrict instalation of fonts (among other things) onto systems in a network. I would like to know if it is possible to embed a font into my code so that I know that it will always be there, or can I provide it with the exe but not have to rely on it being "installed" (i.e. use it from the same folder in which the exe resides)? Thanks, Andrew That depends. What are you using the font for? If you're using a library that requires a family name, then probably not. If you're using a library that can accept a file name, then probably yes. I'm using DFL which uses family names (eg. "Times New Roman"). Remember that the system doesn't care if you append crap to the end of an executable. One trick you can use is to just append whatever files you want to the end of the executable, and then have a little 1K block at the end that tells you where the files are and how big they are; you can then extract the files at run time and delete them when you terminate. When I do this, how do I ensure that the program is able to locate the font after extraction without "installing" it? -- Daniel
Re: Resource availability: fonts
On 5/6/2009 1:39 PM, grauzone wrote:
Use
ubyte[] fontbytes = cast(ubyte[])import("yourfont.ttf");
This will take care of making sure the font is available. How do you
instruct the library (DFL in this case) that this variable contains the
font or that after you write it back to the hard drive to refer to the
file? A font that is not installed, but instead, simply residing in a
folder of your choosing?
Re: Resource availability: fonts
On 5/6/2009 9:50 PM, John C wrote: Tyro[a.c.edwards] Wrote: When I do this, how do I ensure that the program is able to locate the font after extraction without "installing" it? I think AddFontResource from the SDK will do that. http://msdn.microsoft.com/en-us/library/dd183326(VS.85).aspx That was it... Aswesome! Thank you all very much for your assistance.
std.random:uniform - uncompilable example from docs
http://www.digitalmars.com/d/2.0/phobos/std_random.html#uniform Above documentation provides the following example: Random gen(unpredictableSeed); // Generate an integer in [0, 1023] auto a = uniform(0, 1024, gen); // Generate a float in [0, 1) auto a = uniform(0.0f, 1.0f, gen); Which, when complied, produces the following errors: C:\Users\Andrew\code>dmd eds32 eds32.d(9): Error: function std.random.unpredictableSeed is used as a type eds32.d(9): Error: cannot have parameter of type void eds32.d(10): Error: function learn.eds32.randNum.gen (void) does not match parameter types () eds32.d(10): Error: expected 1 function arguments, not 0 eds32.d(10): Error: template std.random.uniform(immutable(char)[] boundaries = "[)",T1,T2,UniformRandomNumberGenerator) if (is(CommonType!(T1,UniformRandomNumberGenerator) == void) && !is(CommonType!(T1,T2) == void)) does not match any function template declaration eds32.d(10): Error: template std.random.uniform(immutable(char)[] boundaries = "[)",T1,T2,UniformRandomNumberGenerator) if (is(CommonType!(T1,UniformRandomNumberGenerator) == void) && !is(CommonType!(T1,T2) == void)) cannot deduce template function from argument types !()(int,int,MersenneTwisterEngine!(uint,32,624,397, 31,-1727483681u,11,7,-1658038656u,15,-272236544u,18)) Suggest that the first line of the example be changed to: auto gen = Random(unpredictableSeed); Or that a correctly working example be provided. Andrew
D input: how-to (RFC)
I am looking for a D version of scanf() but I'm sure there is no such
thing so I tried contrived one. I am sure I missed a slew of obvious
things and that this cannot be used for much more than a little toy on
my personal computer. I would like to make it usable for others so I am
asking for some guidance/suggestions for making it better.
Thanks,
Andrew
This is written in D2 v2.029 with an updated std.random to fix a problem
I was having with the current release.
module ace.io;
private import std.conv: to, ConvError;
private import std.string: split, stripr;
public import std.stdio;
int read(/+File inFile = stdin,+/ A...)(out A a) /+Uncommenting results
in: Error: arithmetic/string type expected for value-parameter, not
File+/
{ start:
auto data = stripr(readln());
auto input = split(data);
string assign()
{
return
` try {
if(a.length != input.length)
return -1;
a[i] = to!(typeof(t))(input[i]);
} catch (ConvError e) {
writeln("Invalid input!");
goto start;
}`;
}
foreach(i, t; a)
{
static if(is(typeof(t) == void))
{}
else static if(is(typeof(t) == bool))
{}
else static if(is(typeof(t) == byte))
mixin(assign);
else static if(is(typeof(t) == ubyte))
mixin(assign);
else static if(is(typeof(t) == short))
mixin(assign);
else static if(is(typeof(t) == ushort))
mixin(assign);
else static if(is(typeof(t) == int))
mixin(assign);
else static if(is(typeof(t) == uint))
mixin(assign);
else static if(is(typeof(t) == long))
mixin(assign);
else static if(is(typeof(t) == ulong))
mixin(assign);
/+static if(is(typeof(t) == cent))
mixin(assign);
static if(is(typeof(t) == ucent))
mixin(assign);+/
else static if(is(typeof(t) == float))
mixin(assign);
else static if(is(typeof(t) == double))
mixin(assign);
else static if(is(typeof(t) == real))
mixin(assign);
else static if(is(typeof(t) == ifloat))
a[i] = ifloat.max;
else static if(is(typeof(t) == idouble))
a[i] = idouble.max;
else static if(is(typeof(t) == ireal))
a[i] = ireal.max;
else static if(is(typeof(t) == cfloat))
a[i] = cfloat.max;
else static if(is(typeof(t) == cdouble))
a[i] = cdouble.max;
else static if(is(typeof(t) == creal))
a[i] = creal.max;
else static if(is(typeof(t) == char))
a[i] = input[i][0];
else static if(is(typeof(t) == wchar))
mixin(assign);
else static if(is(typeof(t) == dchar))
a[i] = input[i][0];
else static if(is(typeof(t) == string))
if(a.length > 1)
a[i] = input[i];
else
a[i] = data;
else static if(is(typeof(t) == dstring))
{}
else static if(is(typeof(t) == char[]))
a[i] = stripr(data).dup;
}
return 0;
}
Re: D input: how-to (RFC)
On 5/11/2009 2:35 PM, grauzone wrote:
Tyro[a.c.edwards] wrote:
I am looking for a D version of scanf() but I'm sure there is no such
thing so I tried contrived one. I am sure I missed a slew of obvious
There's readf() in std.stream. I think you have to use std.cstream : din
to use it with stdin.
Thanks, but I'm trying to learn here... Hoping I can get a better
understanding of how things work or are supposed to work. I'll probably
change it back from read() to get().
int read(/+File inFile = stdin,+/ A...)(out A a) /+Uncommenting results
in: Error: arithmetic/string type expected for value-parameter, not
File+/
That would make inFile a template parameter, which obviously doesn't
make sense with objects, and I guess File is an object. This should work:
int read(A...)(File inFile, out A a)
OK... that works, but how would I set stdin as the default input "file"?
I tried: int read(A...)(out A a, File inFile = stdin) but the compiler
hangs trying to compile it whenever I call read() using 50% of the CPU
resource in the process.
{ start:
auto data = stripr(readln());
auto input = split(data);
string assign()
{
return
` try {
if(a.length != input.length)
return -1;
a[i] = to!(typeof(t))(input[i]);
} catch (ConvError e) {
writeln("Invalid input!");
goto start;
}`;
}
If the user types in too much or too less input, read() returns with an
error (-1), and the caller has to deal with it.
If the user typed in something unparseable, the function prompts an
error and lets the user retry.
This is inconsistent.
Got it... would it be better for the caller handles such problems or the
compiler?
Also, instead of using CTFE to return a const string, why not simply
const assign = ` ` ;
tried that but kept tying "string assign = " and "auto assign = "; both
of which kept failing until I placed it in a function. Thanks I have
changed it to enum.
You're using D 2.0, you probably have to replace "const" by "enum". I
don't know.
You use goto to retry. I'd replace it by a loop. If someone wants to
argue with me if goto is or is not evil, go ahead.
foreach(i, t; a)
{
static if(is(typeof(t) == void))
{}
else static if(is(typeof(t) == bool))
{}
bools can't be read? If the implementation is incomplete, there should
be at least an "assert(false);", maybe even a "static assert(false);".
Got it. What value would you read for a bool though? to me it can be
0||1, true||false, yes||no, etc... Would I simply use 0 && 1 and forget
about the rest?
else static if(is(typeof(t) == byte))
mixin(assign);
else static if(is(typeof(t) == ubyte))
mixin(assign);
else static if(is(typeof(t) == short))
mixin(assign);
else static if(is(typeof(t) == ushort))
mixin(assign);
else static if(is(typeof(t) == int))
mixin(assign);
else static if(is(typeof(t) == uint))
mixin(assign);
else static if(is(typeof(t) == long))
mixin(assign);
else static if(is(typeof(t) == ulong))
mixin(assign);
/+static if(is(typeof(t) == cent))
mixin(assign);
static if(is(typeof(t) == ucent))
mixin(assign);+/
else static if(is(typeof(t) == float))
mixin(assign);
else static if(is(typeof(t) == double))
mixin(assign);
else static if(is(typeof(t) == real))
mixin(assign);
Oh god, what the fuck! String mixins are the new #define! OK, at least
ROTFDWL - that was truly unexpected. Thanks.
this reduces the code duplication, but the code duplication shouldn't be
there in the first place.
You could just throw all the types into a tuple, and then foreach() on
it, checking for the type in each iteration.
Awesome... I didn't even think about that. Got it!
Or just make a single giant if() statement to check for all types to!()
supports (like if(is(typeof(t) == int) && is(typeof(t) == uint)...). In
any case, you could reduce the number of is() parts by using isNumeric()
from std.traits.
Or find a way to check for to!() supported data types automatically (but
I don't know to!() well enough if this is possible).
else static if(is(typeof(t) == ifloat))
a[i] = ifloat.max;
else static if(is(typeof(t) == idouble))
a[i] = idouble.max;
else static if(is(typeof(t) == ireal))
a[i] = ireal.max;
else static if(is(typeof(t) == cfloat))
a[i] = cfloat.max;
else static if(is(typeof(t) == cdouble))
a[i] = cdouble.max;
else static if(is(typeof(t) == creal))
a[i] = creal.max;
What?
That's a residue of my first try... I will take care of those. I really
should have replaced those with "assert(false);" because I didn't
understand how to implement them. Will read some more and try again in.
else static if(is(typeof(t) == char))
a[i] = input[i][0];
input could be an empty string, and random things could happen.
got it...
else static if(is(typeof(t) == wchar))
mixin(assign);
else static if(is(typeof(t) == dchar))
a[i] = input[i][0];
else static if(is(typeof(t) ==
Re: Simple file manipulation
On 5/20/2009 6:19 PM, BLS wrote:
Sam Hu wrote:
I looked up in D2 in std.stdio,std.file,std.cstream and std.stream and
try to find a very simple method which can read from a file once a
value other than once an entire row.I just can not find it maybe this
idea is wrong.Say how to simply read & write key/value pairs to and
from a file like this format:
//file "data.dat"
Tommy M 22
where the keys are name,gender and age while the values are Tommy,M ,22.
I found there is methods that can read from a file once an entire
row.But is there a simple method which can read once a value?In C++
one can do like this:
#include
#include
using namespace std;
ifstream inData;
inData.open("data.dat");
inData>>name;
inData>>gender;
inData>>age;
cout<<"Info:"<
IN D2 you can use std.file and slurp (cool name, beside)
slurp reads an entire file into an array.
// Load file; each line is an string followed by whitespace , another
//string followed by whitespace and a int.
auto a = slurp!(string, string, int)("data.dat", "%s %s %s");
Now you can go on an play a bit with the new range stuff. (std.range)
Enjoy, Björn
Unfortunately, that will not work. DMD fails with a Stack Overflow
whenever upon encountering any of the string types (dstring, string,
char[], wstring, etc...) being passed to this template. Works fine or
other types as far as I can tell (including arrays).
import std.file;
void main()
{
auto a = slurp!(string)("", "%s");
}
results in Stack Overflow during compilation.
How does one properly display an animated GIF using DFL?
I am able to display the GIF but all animation ceases. How would I activate this feature? Thanks, Andrew
