Re: How array concatenation works... internally
On Monday, 23 April 2018 at 23:27:17 UTC, Steven Schveighoffer wrote: ... If you want to know more about the array runtime, I suggest this article: https://dlang.org/articles/d-array-article.html ... Thanks for replying and this article is what I was looking for.
Re: How array concatenation works... internally
On Monday, 23 April 2018 at 23:15:13 UTC, Dnewbie wrote: It's related to memcpy? By the way... It's related to realloc and memcpy?
How array concatenation works... internally
Hi,
I'd like to understand how array concatenation works internally,
like the example below:
//DMD64 D Compiler 2.072.2
import std.stdio;
void main(){
string[] arr;
arr.length = 2;
arr[0] = "Hello";
arr[1] = "World";
writeln(arr.length);
arr = arr[0..1] ~ "New String" ~ arr[1..2];
writeln(arr.length);
foreach(string a; arr){
writeln(a);
}
}
http://rextester.com/DDW84343
The code above prints:
2
3
Hello
New String
World
So, It changes the "arr" length and put the "New String" between
the other two. It's very fast with some other tests that I made.
Now I'm curious to know what's happening under the hood. It's
related to memcpy?
On Phobos "array.d" source I've found this:
/// Concatenation with rebinding.
void opCatAssign(R)(R another)
{
auto newThis = this ~ another;
move(newThis, this);
}
But now I'm having problem to find how I can reach this "move"
function, since I couldn't find any "move" on the "std" folder.
Thanks in advance.
Re: Question about function aliases
On Wednesday, 11 December 2013 at 23:42:44 UTC, Gary Willoughby
wrote:
For example i have some C code like this:
typedef void (Tcl_InterpDeleteProc) _ANSI_ARGS_((ClientData
clientData, Tcl_Interp *interp));
void Tcl_CallWhenDeleted(Tcl_Interp* interp,
Tcl_InterpDeleteProc* proc, ClientData clientData);
I intend on converted this to D thus:
alias void function(ClientData clientData, Tcl_Interp* interp)
Tcl_InterpDeleteProc;
void Tcl_CallWhenDeleted(Tcl_Interp* interp,
Tcl_InterpDeleteProc* proc, ClientData clientData);
Is it correct keeping the * with the Tcl_InterpDeleteProc
parameter or do i remove it? Is the alias above a function
pointer?
To call this function can i use a function literal for the
Tcl_InterpDeleteProc parameter? or do i need to pass an address
of the function?
It's a function pointer.
Test:
import std.stdio;
alias extern(C) void function(void*) Callback;
void Call(Callback c)
{
c(c);
}
extern(C) void callback(void* v)
{
writefln(v: %04X, v);
}
void main()
{
Callback c = callback;
Call(c);
writefln(c: %04X, c);
}
Re: Getting the missing Windows functions
On Tuesday, 8 October 2013 at 08:54:44 UTC, Mike Parker wrote: On 10/8/2013 6:57 AM, Andrej Mitrovic wrote: On 10/7/13, Matt webwra...@fastmail.fm wrote: The missing functions (or at least the one I'm interested in at the moment) that I'm trying to use are supposed to be IN kernel32, and have been in there since Windows Vista. That's why I'm a little confused. The kernel32.lib distributed with DMD is likely out of date. See: http://d.puremagic.com/issues/show_bug.cgi?id=6625 It's very out of date. When I need Windows functions that are missing from the DMD libs, I prototype them as function pointers and load them dynamically. It's a one-off investment for each function and I don't need many of them, so no big deal. I always run this when I install a new dmd cd C:\D\dmd2\windows\lib\ coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\advapi32.lib advapi32.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\comctl32.lib comctl32.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\comdlg32.lib comdlg32.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\gdi32.libgdi32.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\kernel32.lib kernel32.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\shell32.lib shell32.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\shlwapi.lib shlwapi.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\user32.lib user32.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\ws2_32.lib ws2_32.lib coffimplib C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Lib\wsock32.lib wsock32.lib
Re: How to cleanup after Socket.bind on Linux?
On Tuesday, 27 August 2013 at 03:30:11 UTC, Ali Çehreli wrote: It cannot be started a second time for 8080 still being in use, unless you wait for several seconds It works on Windows7, no need to wait.
Re: DLLs: Cleaning up
On Thursday, 11 July 2013 at 12:58:42 UTC, Chris wrote: I have a DLL written in D I load into a Python application via ctypes like so: lib = CDLL(mydll) The DLL loads and can be used no problem. However, once the DLL is discarded of by the program, the program either doesn't react or crashes. I still haven't worked out how to clean up the DLL correctly before it is unloaded / detached (from Python). I guess it's the GC and/or some C stuff I've overlooked. I have tried both approaches described on this page: http://dlang.org/dll.html. Maybe someone of yous once had a similar problem and found a solution. Any hints or suggestions would be appreciated. Thanks. Ye. Please try compiling your DLL with GDC.
Re: x64 Link Issues - Can someone please help?
phobos64.lib(dmain2_4ac_1a5.obj) : error LNK2019: unresolved external symbol _Dmain referenced in function main Please add -L/DLL to the command line.
Trouble with DLL address
I have a DLL which exports a function GetFunction. GetFunction
returns a pointer to RealFunction. Now I want to run RealFunction
from my D program, but for some reason I get the wrong address.
Here is the code.
dll64.c -
#define WIN32_LEAN_AND_MEAN
#include windows.h
int __stdcall RealFunction(int a)
{
return a + 1;
}
typedef int (__stdcall *FuncPtr)(int);
FuncPtr __stdcall GetFunction()
{
return RealFunction;
}
mydll64.def
LIBRARY mydll64.dll
EXPORTS
GetFunction
-
build with MSVC64:
cl -c dll64.c -Fomydll64.obj
link /DLL /OUT:mydll64.dll mydll64.obj /DEF:mydll64.def
And this is the D program.
testdll64d.d
// dmd -m64 -c testdll64d.d -oftestdll64d.obj
// link /OUT:testdll64d.exe testdll64d.obj
import core.runtime;
import std.c.windows.windows;
import std.stdio;
alias extern(Windows) int function(int) FuncPtr;
int main(string[] args)
{
HMODULE dll = LoadLibraryA(mydll64.DLL);
FARPROC getFunction = GetProcAddress(dll, GetFunction);
FuncPtr realFunction = cast(FuncPtr) getFunction();
writefln(dll address: %08x, dll);
writefln(GetFunction address: %08x, getFunction);
writefln(RealFunction address: %08x, realFunction);
writefln(RealFunction result: %d, realFunction(7));//--
CRASH
return 0;
}
--
Output:
dll address: 18000
GetFunction address: 180001020
RealFunction address: 80001000
CRASH
BTW, this works:
FuncPtr realFunction = cast(FuncPtr) (getFunction()
0x | cast(size_t) dll);
Re: Trouble with DLL address
The problem is FARPROC. Thank you everybody.
Solution:
import core.runtime;
import std.c.windows.windows;
import std.stdio;
alias extern(Windows) int function(int) FuncPtr;
alias extern(Windows) FuncPtr function() GetFuncPtr;
int main(string[] args)
{
HMODULE dll= LoadLibraryA(mydll64.DLL);
GetFuncPtr getFunction = cast(GetFuncPtr) GetProcAddress(dll,
GetFunction);
FuncPtr realFunction = cast(FuncPtr) getFunction();
writefln(dll address: %08x, dll);
writefln(GetFunction address: %08x, getFunction);
writefln(RealFunction address: %08x, realFunction);
writefln(RealFunction result: %d, realFunction(7));
return 0;
}
Re: #define trouble
On Tuesday, 27 November 2012 at 06:27:49 UTC, Ali Çehreli wrote:
On 11/26/2012 10:05 PM, dnewbie wrote:
I have the following C struct from ldap.h
typedef struct ldapmod {
int mod_op;
char *mod_type;
union mod_vals_u {
char **modv_strvals;
struct berval **modv_bvals;
} mod_vals;
#define mod_values mod_vals.modv_strvals
#define mod_bvalues mod_vals.modv_bvals
} LDAPMod;
It is used like this:
LDAPMod title;
title.mod_values = x;
I wonder how can I write the line 'title.mod_values = x;' in D.
Currently I do like this:
struct ldapmod {
int mod_op;
char* mod_type;
union mod_vals_u {
char** modv_strvals;
berval** modv_bvals;
}
mod_vals_u mod_vals;
}
alias ldapmod LDAPMod;
LDAPMod title;
title.mod_vals.modv_strvals = x;
A pair of @property functions would work, one of which may be
unnecessary:
alias int berval;
struct ldapmod {
intmod_op;
char* mod_type;
union mod_vals_u {
char** modv_strvals;
berval** modv_bvals;
}
mod_vals_u mod_vals;
char** mod_values() @property
{
return mod_vals.modv_strvals;
}
void mod_values(char** value) @property
{
mod_vals.modv_strvals = value;
}
// similarly for mod_bvalues...
}
alias ldapmod LDAPMod;
void main()
{
LDAPMod title;
char** x;
// title.mod_vals.modv_strvals = x;
title.mod_values = x;
}
Ali
Perfect! Thank you.
#define trouble
I have the following C struct from ldap.h
typedef struct ldapmod {
int mod_op;
char *mod_type;
union mod_vals_u {
char **modv_strvals;
struct berval **modv_bvals;
} mod_vals;
#define mod_values mod_vals.modv_strvals
#define mod_bvalues mod_vals.modv_bvals
} LDAPMod;
It is used like this:
LDAPMod title;
title.mod_values = x;
I wonder how can I write the line 'title.mod_values = x;' in D.
Currently I do like this:
struct ldapmod {
int mod_op;
char* mod_type;
union mod_vals_u {
char** modv_strvals;
berval** modv_bvals;
}
mod_vals_u mod_vals;
}
alias ldapmod LDAPMod;
LDAPMod title;
title.mod_vals.modv_strvals = x;
Re: WinAPI LowLevel Keyboard Hooks
On Thursday, 19 July 2012 at 15:49:48 UTC, DLimited wrote:
But what are the differences of loading the Unicode version vs.
the ANSI version? I called the Unicode one because I figured
that would be the sensible choice, since Unicode is the default
for D (if I remember correctly). I have no clue what the actual
effects of calling the wrong version would be.
Anyway, here's the of my .dll:
-- Code begin --
import std.c.windows.windows;
import core.sys.windows.dll;
import core.runtime;
extern (C) void gc_init();
extern (C) void gc_term();
extern (C) void _minit();
extern (C) void _moduleCtor();
extern (C) void _moduleDtor();
extern (Windows) struct KBDLLHOOKSTRUCT {
DWORD vkCode;
DWORD scanCode;
DWORD flags;
DWORD time;
ULONG_PTR dwExtraInfo;
};
extern (Windows) LRESULT CallNextHookEx(
int function() hhk,
int nCode,
WPARAM wParam,
LPARAM lParam
);
__gshared HINSTANCE g_hInst;
extern (Windows) BOOL DllMain(HINSTANCE hInstance, ULONG
ulReason, LPVOID pvReserved) {
return true;
switch (ulReason) {
case DLL_PROCESS_ATTACH:
g_hInst = hInstance;
Runtime.initialize;
//dll_process_attach( hInstance, true );
break;
case DLL_PROCESS_DETACH:
dll_process_detach( hInstance, true );
break;
case DLL_THREAD_ATTACH:
dll_thread_attach( true, true );
break;
case DLL_THREAD_DETACH:
dll_thread_detach( true, true );
break;
default:
return true;
}
return true;
}
extern (Windows) LRESULT LowLevelKeyboardProc(int code, WPARAM
wParam, LPARAM lParam)
{
KBDLLHOOKSTRUCT* details = cast(KBDLLHOOKSTRUCT*) lParam;
MessageBoxA(null, cast(char *)WHOA, Error,
MB_OK | MB_ICONEXCLAMATION);
if(code == 0 wParam == WM_KEYDOWN)
{
if(details.vkCode == 0x41)
{
return 1;
}
}
return CallNextHookEx(null, code, wParam, lParam);
}
-- Code End --
Lots of copypaste was used. I injected some senseless code to
try and check if a specific function ever gets called, though I
now realise the DllLoad itself is what fails. Haven't cleaned
it back up yet, though.
The .def file contains the following: (including newlines)
-- .DEF BEGIN --
LIBRARY keydll.dll
EXETYPE NT
SUBSYSTEM WINDOWS
CODE PRELOAD
DATA PRELOAD
-- .DEF END --
I compiled the dll using:
dmd -ofkeydll.dll -L/IMPLIB keydll.d keydll.def
No linker/compiler errors.
I guess you have to 'export' the function:
extern (Windows) export LRESULT LowLevelKeyboardProc(int code,
WPARAM
wParam, LPARAM lParam)
and include
EXPORTS
LowLevelKeyboardProc
in the .DEF file
Re: WinAPI LowLevel Keyboard Hooks
You don't see the WHOA message? Try this alias HANDLE HHOOK;
Re: WinAPI LowLevel Keyboard Hooks
On Thursday, 19 July 2012 at 17:48:06 UTC, DLimited wrote: On Thursday, 19 July 2012 at 17:35:29 UTC, dnewbie wrote: You don't see the WHOA message? Try this alias HANDLE HHOOK; No, I don't get any message after key-presses. I changed int function() to HANDLE, sadly it still doesn't work. For some reason, it doesn't work with 'Thread.sleep' This works: http://dpaste.dzfl.pl/1e6e5960
Re: WinAPI LowLevel Keyboard Hooks
On Thursday, 19 July 2012 at 18:56:15 UTC, DLimited wrote: On Thursday, 19 July 2012 at 18:40:15 UTC, dnewbie wrote: On Thursday, 19 July 2012 at 17:48:06 UTC, DLimited wrote: On Thursday, 19 July 2012 at 17:35:29 UTC, dnewbie wrote: You don't see the WHOA message? Try this alias HANDLE HHOOK; No, I don't get any message after key-presses. I changed int function() to HANDLE, sadly it still doesn't work. For some reason, it doesn't work with 'Thread.sleep' This works: http://dpaste.dzfl.pl/1e6e5960 It doesn't work for me. I can 1 Message Box from the Code in MyWinMain, but none for the Keystrokes. I registered a hook for Keyboard input, and that code is supposed to produce a message box aswell. The function for that is called LowLevelKeyboardProc and located in above-mentioned .dll file. The registering of the hook seems to pass, but the function never actually gets called. Did you add EXPORTS LowLevelKeyboardProc to the .DEF file? It works here.
Re: WinAPI LowLevel Keyboard Hooks
On Thursday, 19 July 2012 at 19:51:31 UTC, DLimited wrote: Yes, I did. Are the newlines important? And you really get a MessageBox per keystroke? I start as admin, disabled my AV but still, no success. Yes, I get 2 WHOA messages. One from the WM-KEYDOWN and the other from WM-KEYUP. Sorry I don't know what is wrong.
Re: Winamp plugin
On Friday, 6 July 2012 at 00:38:28 UTC, dnewbie wrote: It works without error when compiled by GDC. Thanks. Here it is http://my.opera.com/run3/blog/2012/07/12/copyto-winamp-plugin It adds an item in Winamp 'Send to' menu
Re: Linking OpenSSL on Windows
On Sunday, 8 July 2012 at 22:33:15 UTC, Andy wrote: I've been using D on linux for a few months now and have the hang of it. I wrote a project that should be able to be compiled on both Linux and Windows. I've gotten it to work excellently on Linux, but I can't seem to figure out how to link the openssl dll files on Windows. On linux, a simple passing of -lssl and -lcrypto the ld works great, but what do I need to do for this to work with optlink? I think you need to generate an import library from the openssl dll file, then use the generated .lib file in optlink command line, see http://www.digitalmars.com/ctg/implib.html
Re: Winamp plugin
On Thursday, 5 July 2012 at 08:55:33 UTC, Denis Shelomovskij wrote: What's your OS? If Windows XP, than D DLL can't be unloaded because of non-perfect TLS fixing technique (I created a perfect one but I never managed to prepare such projects for release so nobody knows about them). And on any Windows Digital Mars C runtime behaves very nasty when it's dynamically loaded. IIRC, it do bad things when loaded in non-main with TLS index != 0 thread and when unloaded (IIRC, again, at least it closes handles). Hi. OS is Windows7-64bit. When I run Winamp in windbg, windbg crashes. The last information I can see is 'Module Unload: C:\WINDOWS\WINSXS\X86_\MSVCR90.DLL' Thanks.
Re: Winamp plugin
It works without error when compiled by GDC. Thanks.
Winamp plugin
I'm writing a Winamp plugin in D. Winamp loads my plugin and everything is fine until I close Winamp. At this point, Winamp calls the Quit() function of my plugin and *after* that, Winamp crashes. Here is the code. D source http://dpaste.dzfl.pl/e2b2f886 myplugin.def - .DEF file --- LIBRARY ml_myplugind.dll EXETYPE NT SUBSYSTEM WINDOWS EXPORTS winampGetMediaLibraryPlugin --- Compile: dmd myplugin.d myplugin.def -ofml_myplugind.dll -L/IMPLIB Copy ml_myplugind.dll to 'C:\Program Files (x86)\Winamp\Plugins' Restart Winamp and go to Options - Preferences - Plugins - Media Library. You'll see 'My Cool Plugin D' [ml_myplugind.dll]' that means the plugin was loaded. Close Winamp. You'll see a message box 'Quit() from D', from the plugin and MS-Windows displays a error dialog. Click more information and it says APPCRASH module ml_myplugind.dll. I have tried the following C code which does the same thing, and I've got no APPCRASHES http://pastebin.com/7t8jkfn8 I can't see what is wrong. Any help is appreciated. More information about Winamp plugin: http://wiki.winamp.com/wiki/Media_Library_Plugin
Re: Build WindowsApi bindings with dmd?
On Monday, 2 July 2012 at 22:10:00 UTC, Damian wrote: I was looking through the bindings and only see a makefile for GNU make. Is there a version for dmd? I really wanted to avoid GNU make if possible. You can try this https://github.com/AndrejMitrovic/WindowsAPI/downloads
Re: function pointer when a function is overloaded.
import std.stdio;
alias void function(int) fooInt;
alias void function(long) fooLong;
int main(string[] args)
{
fooInt f1 = foo;
fooLong f2 = foo;
f1(1L);
f2(1L);
return 0;
}
void foo(int i)
{
writeln(foo(int i));
}
void foo(long i)
{
writeln(foo(long i));
}
Re: Windows - ZeroMemory macro
On Sunday, 27 May 2012 at 03:55:58 UTC, jerro wrote: On Sunday, 27 May 2012 at 03:29:17 UTC, dnewbie wrote: In C I can write OPENFILENAME ofn; ZeroMemory(ofn, sizeof(ofn)); In D, there is no ZeroMemory. Please help me. You could use c memset: import std.c.string; memset(cast(void*)ofn, 0, ofn.sizeof); or this: (cast(byte*) a)[0 .. a.sizeof] = 0; Thank you.
Windows - ZeroMemory macro
In C I can write OPENFILENAME ofn; ZeroMemory(ofn, sizeof(ofn)); In D, there is no ZeroMemory. Please help me.
Re: libraries and c++ compatibility
On Sunday, 13 May 2012 at 02:44:22 UTC, Jason King wrote: I'm trying to use ocilib (deimos\ocilib) bindings and having some issues. dmd 2.0.59, Windows 7 64 bit. I can change sc.ini to get everything to build. I can compile with dmd myapp.d -Ipath_to_deimos -c, but I can't seem to figure out the right switches to make the app find the ociliba-dm.lib that I generated. Using sc.ini seems to work, using the lib environment variable seems to work but I'd like to understand how to make the command line switches work. The compiled application hangs the first time it calls an ocilib routine and I don't expect you folks to debug that for me but it occurred to me that since I have the paid-for version of dmc I could try essentially the same code vs. c++ and if it worked that would isolate the problem to the ocilib.d header. I have the same can't find the library with command line switches problem but I suspect the D fix will help me c++-wise as well. The unique to c++ issue is shows like so. C:\ocilib\ocilib3.9.3\lib32dmc myapp.cpp -c -Ic:\ocilib\ocilib3.9.3\include C:\ocilib\ocilib3.9.3\lib32optlink myapp.obj,,,ociliba-dm.lib OPTLINK (R) for Win32 Release 7.50B1 Copyright (C) Digital Mars 1989 - 2001 All Rights Reserved myapp.obj(myapp) Error 42: Symbol Undefined _OCI_Cleanup myapp.obj(myapp) Error 42: Symbol Undefined _OCI_GetString ... 7 more, covering all ocilib calls. running lib -l vs. ociliba-dm.lib shows symbols with @ signs appended, e.g. _OCI_Cleanup@0 and _OCI_GetString@8. I suspect there's some simple disconnect on my part here, but I can't see it. Any assistance deeply appreciated. Please try adding `-DOCI_API=__stdcall -DOCI_CHARSET_ANSI` to dmc command line. (check http://orclib.sourceforge.net/doc/html/group__g__install.html) If you get runtime errors, please check your ORACLE_HOME environment variable and make sure your %ORACLE_HOME%\bin directory is in your PATH environment variable.
Re: libraries and c++ compatibility
On Sunday, 13 May 2012 at 19:01:15 UTC, Jason King wrote: . C:\ocilib\ocilib3.9.3\lib32dmc myapp.cpp -c -Ic:\ocilib\ocilib3.9.3\include C:\ocilib\ocilib3.9.3\lib32optlink myapp.obj,,,ociliba-dm.lib OPTLINK (R) for Win32 Release 7.50B1 Copyright (C) Digital Mars 1989 - 2001 All Rights Reserved myapp.obj(myapp) Error 42: Symbol Undefined _OCI_Cleanup myapp.obj(myapp) Error 42: Symbol Undefined _OCI_GetString ... 7 more, covering all ocilib calls. Please try adding `-DOCI_API=__stdcall -DOCI_CHARSET_ANSI` to dmc command line. (check http://orclib.sourceforge.net/doc/html/group__g__install.html) If you get runtime errors, please check your ORACLE_HOME environment variable and make sure your %ORACLE_HOME%\bin directory is in your PATH environment variable. Thanks for the help. All I did was generate a OMF library running IMPLIB vs. OCILIBA.DLL. I think your suggestion involves building OCILIB from scratch. Is that right? No. You should add '-DOCI_API=__stdcall -DOCI_CHARSET_ANSI' to dmc when building your c/cpp app. Rebuilding the library looks like a job and I want to make sure that's what I need to do to proceed.
Re: mysql binding/wrapper?
On Saturday, 28 April 2012 at 15:30:13 UTC, simendsjo wrote: stuff/blob/master/mysql.d http://my.opera.com/run3/blog/2012/03/13/d-mysql I use it in a bank account application. It works.
Re: string concatenation
On Sunday, 8 April 2012 at 05:27:50 UTC, Jonathan M Davis wrote:
On Sunday, April 08, 2012 07:08:09 dnewbie wrote:
I have a wchar[] and I want to convert it to UTF8
then append a string. This is my code.
import std.c.windows.windows;
import std.string;
import std.utf;
int main()
{
wchar[100] v;
v[0] = 'H';
v[1] = 'e';
v[2] = 'l';
v[3] = 'l';
v[4] = 'o';
v[5] = 0;
string s = toUTF8(v) ~ , world!;
MessageBoxA(null, s.toStringz, myapp, MB_OK);
return 0;
}
I want Hello, world!, but the result is Hello only. Please
help me.
D strings are not null-terminated, so v[5] = 0 doesn't do
anything to
terminate that string. The whole point of toStringz is to put a
null character
on the end of a string (and allocate a new string if need be)
and return a
pointer to it. C code will then use the null character to
indicate the end of
the string, but D won't.
What you've done with
string s = toUTF8(v) ~ , world!;
is create a string that is
['H', 'e', 'l', 'l', 'o', '\0', '\0', '\0', ...] (all of the
characters up to
the v[99] are '\0')
and append
[',', ' ', 'w', 'o', 'r', 'l', 'd', '!']
to it. The result is a string whith is 108 characters long with
a ton of null
characters in the middle of it. When you call toStringz on it,
it may or may
not allocate a new string, but in the end, you have a string
which is 109
characters long with the last character being '\0' (still with
all of the null
characters in the middle) which you get an immutable char*
pointing to.
So, when the C code operates on it, it naturally stops
processing when it hits
the first null character, since that's how C determines the end
of a string.
You can embed null characters in a string and expect C to
operate on the whole
thing. And since D strings aren't null-terminated, you can't
expect that
setting any of it their elements to null will do anything to
terminate the
string in D or stop D functions from operating on the whole
string. You have
to slice the static wchar array with the exact elements that
you want if you
intend to terminate it before its end.
- Jonathan M Davis
OK. Thank you.
string concatenation
I have a wchar[] and I want to convert it to UTF8
then append a string. This is my code.
import std.c.windows.windows;
import std.string;
import std.utf;
int main()
{
wchar[100] v;
v[0] = 'H';
v[1] = 'e';
v[2] = 'l';
v[3] = 'l';
v[4] = 'o';
v[5] = 0;
string s = toUTF8(v) ~ , world!;
MessageBoxA(null, s.toStringz, myapp, MB_OK);
return 0;
}
I want Hello, world!, but the result is Hello only. Please help me.
Re: Converting C .h Files to D Modules
On Wednesday, 21 March 2012 at 01:09:58 UTC, Andrej Mitrovic
wrote:
On 3/21/12, Pedro Lacerda kanvua...@gmail.com wrote:
Ouch, void* is the same in both languages, sorry. I addressed
a new problem:
typedef struct SomeFunctions {
void *(*funcA)(char*, size_t);
void *(*funcB)(void);
} SomeFunctions;
How do I convert that functions references into an D struct?
extern(C)
struct SomeFunctions {
void function(char*, size_t) funcA;
void function() funcB;
}
Use HTOD (http://dlang.org/htod.html) if you can to convert .h
to .D
(it's Windows-only but might be usable via Wine).
Why not
void* function(char*, size_t) funcA;
void* function() funcB;
htod - const
I have this file tmp.h: const char *getvalue(const char *key); I run htod tmp.h and I've got the output --- /* Converted to D from tmp.h by htod */ module tmp; //C const char *getvalue(const char *key); extern (C): char * getvalue(char *key); --- Why is 'const' removed?
Re: htod - const
Thanks Trass3r. On Tue, Mar 6, 2012, at 05:50 PM, Trass3r wrote: Why is 'const' removed? cause htod sucks. D1 didn't have const and htod wasn't updated for ages.
Re: std.socket with GDC
On Sat, Feb 25, 2012, at 10:38 PM, Mars wrote: On Saturday, 25 February 2012 at 18:27:29 UTC, Vladimir Panteleev wrote: On Friday, 24 February 2012 at 19:15:26 UTC, Mars wrote: Hello everybody. When trying to compile a program using GDC (Windows), which includes an import std.socket, I get a lot undefined references, like undefined reference to `WSAGetLastError@0' Try linking with libws2_32.a. Still the same. Does that work for you? std.socket works for me, gdc64 (windows)
Re: Examples of Windows services in D?
Here is a simple service in D http://my.opera.com/run3/blog/2012/02/23/windows-services-in-d It's basically c translated to d. On Tue, Feb 21, 2012, at 03:08 PM, Graham Fawcett wrote: Hi folks, I've got a Windows service that I'd like to write in D, if possible. I see that Andrej Mitrovic has provided a binding for the relevant parts of the Windows API (thanks!): https://github.com/AndrejMitrovic/DWinProgramming/blob/master/win32/ winsvc.d Has anyone used this (or another binding) to write an actual service? Particularly, I was hoping to find a base class that takes care of common tasks (installing, removing, starting, etc.). Thanks! Graham
Re: Socket: The connection was reset
nrgyzer,
please check the return value of 'receive'.
http://dlang.org/phobos/std_socket.html#receive
On Fri, Feb 10, 2012, at 02:06 PM, nrgyzer wrote:
Works perfectly, thanks :)
But... how can I read the complete HTTP-header? When I try the following:
string header;
ubyte[1024] buffer;
while (cs.receive(buffer)) header ~= buffer;
... it works as long as the header doesn't have a length like 1024, 2048,
3072... Otherwise cs.receive() blocks forever and the server doesn't
respond
anything. Is there any solution how to prevent/solve this problem?
== Auszug aus DNewbie (r...@myopera.com)'s Artikel
Try this
while(true) {
Socket cs = s.accept();
cs.receive(new byte[1024]);
cs.sendTo(HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello
World);
cs.close();
}
On Thu, Feb 9, 2012, at 07:31 PM, Nrgyzer wrote:
Hi guys,
I wrote the following few lines:
private {
import std.socket;
}
void main() {
Socket s = new TcpSocket();
s.bind(new InternetAddress(80));
s.listen(0);
while(true) {
Socket cs = s.accept();
cs.sendTo(HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello
World);
cs.close();
}
s.close();
}
The code compiles successfully and I also the server also responses with
Hello World, but when I reload the page I sometimes get the following
error (Firefox): The
connection was reset - I also often get the same error in other
browsers. Is there anything wrong with the code?
Thanks in advance!
--
D
Re: Socket: The connection was reset
Try this
while(true) {
Socket cs = s.accept();
cs.receive(new byte[1024]);
cs.sendTo(HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello
World);
cs.close();
}
On Thu, Feb 9, 2012, at 07:31 PM, Nrgyzer wrote:
Hi guys,
I wrote the following few lines:
private {
import std.socket;
}
void main() {
Socket s = new TcpSocket();
s.bind(new InternetAddress(80));
s.listen(0);
while(true) {
Socket cs = s.accept();
cs.sendTo(HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello
World);
cs.close();
}
s.close();
}
The code compiles successfully and I also the server also responses with
Hello World, but when I reload the page I sometimes get the following
error (Firefox): The
connection was reset - I also often get the same error in other
browsers. Is there anything wrong with the code?
Thanks in advance!
--
D
Re: i18n
On Fri, Feb 3, 2012, at 09:48 PM, Trass3r wrote:
Thanks a lot, So I just need to detect user locale using How to do
that?
You can always use the functions you would use in C.
You can see your language id in this page:
http://msdn.microsoft.com/en-us/library/dd318693(v=vs.85).aspx
Example
-
import std.stdio;
import std.c.windows.windows;
alias DWORD LCID;
extern (Windows) LCID GetSystemDefaultLCID();
int main()
{
LCID lcid = GetSystemDefaultLCID();
printf(GetSystemDefaultLCID = 0x%04X\n, lcid);
switch (lcid)
{
case 0x0409:
writeln(United States (US));
break;
case 0x040c:
writeln(France (FR));
break;
default:
writeln(Unknown);
break;
}
return 0;
}
-
Re: MySQL
On Sun, Jan 22, 2012, at 12:11 AM, Ali Çehreli wrote: On 01/21/2012 06:28 PM, Mars wrote: On Sunday, 22 January 2012 at 00:50:28 UTC, Ali Çehreli wrote: Are you also including the library on the command line with -L-l? For example, for ncurses: dmd ... -L-lncurses ... And if needed, also -L-L to specify the location of library files for the linker. Ali Yes, I am including it. Tried pragma and command line. And I don't get a message that the lib couldn't be found. What exactly is -L-l supposed to do? Is this valid in DMD 2.057? I get an error with it (Unknown Option). Mars -L is dmd's the linker flag option. Anything after that is passed to the linker. So -L-l passes -l to the linker: http://www.d-programming-language.org/dmd-linux.html Ali I've took a look at MySQL headers, the functions use __stdcall, but in libmysql.dll exports table they are not decorated.
Re: MySQL
On Sun, Jan 22, 2012, at 01:13 PM, Mars wrote: On Sunday, 22 January 2012 at 10:21:29 UTC, DNewbie wrote: I've took a look at MySQL headers, the functions use stdcall, but in libmysql.dll exports table they are not decorated. This means...? Shouldn't it at least compile, if they are listed in the def file, coming from the lib? You should add 'extern(Windows)', but it would not work anyway. Can someone confirm the oplink does not handle this type of module (undecorated stdcall functions)?
Re: MySQL
On Sun, Jan 22, 2012, at 11:02 PM, DNewbie wrote:
On Sun, Jan 22, 2012, at 01:13 PM, Mars wrote:
On Sunday, 22 January 2012 at 10:21:29 UTC, DNewbie wrote:
I've took a look at MySQL headers, the functions use stdcall,
but in libmysql.dll exports table they are not decorated.
This means...?
Shouldn't it at least compile, if they are listed in the def
file, coming from the lib?
You should add 'extern(Windows)', but it would not work anyway.
Can someone confirm the oplink does not handle this type of module
(undecorated stdcall functions)?
You can try
// - libmysql.def ---
LIBRARY libmysql.dll
EXETYPE NT
SUBSYSTEM WINDOWS
EXPORTS
_mysql_init@4=mysql_init
//
// --- mysqltest.d
import libmysql;
alias void MYSQL;
int main()
{
MYSQL *m = libmysql.mysql_init(null);
return 0;
}
// ---
// --- libmysql.di ---
alias void MYSQL;
export extern (Windows) MYSQL *mysql_init(MYSQL *);
//
$ implib /system libmysql.lib libmysql.def
$ dmd mysqltest.d libmysql.lib
It works..
Re: MySQL
Please check whether your MySQL lib is 64 bit and your app is 32 bit. On Sat, Jan 21, 2012, at 10:38 PM, Mars wrote: Hello everyone. I've been trying to use MySQL in an application on Windows, but I always get Symbol Undefined _mysql_init I've put the lib in the correct folder, so I don't know what the problem might be. I've tried several libs, and tried to compile it myself (always converted using coffimplib), but it fails, no matter what. I've also tried to make a def file out of the lib, and the functions are definitly listed as exports there. Any idea what I might doing wrong? Mars -- D
Re: OOP Windows
On Mon, Jan 16, 2012, at 05:59 PM, Andrej Mitrovic wrote: On 1/16/12, Robert Clipsham rob...@octarineparrot.com wrote: https://github.com/AndrejMitrovic/DWinProgramming I think he's looking for an OOP approach, that code is basically C translated to D. There are some OOP libraries he can use, like DGUI or DFL. And there are some OOP wrappers for WinAPI somewhere (probably on dsource). Maybe http://pr.stewartsplace.org.uk/d/sdwf/ or http://www.dsource.org/projects/minwin. I think these two might be slightly outdated by now though. Yes. I know a bit of C (not C++) and the Windows API. Now I'd like to learn more about OOP. That's what I've found so far, both are for C++ programmers http://win32-framework.sourceforge.net/ http://relisoft.com/win32/ Wel..I'm not sure. Should I learn C++ before D? Thank you everybody.
OOP Windows
Is there a D version of this type of tutorial? https://www.relisoft.com/win32/index.htm
Re: A tutorial on D templates
On Sat, Jan 14, 2012, at 09:07 AM, Philippe Sigaud wrote: On 13/01/12 10:48 PM, DNewbie wrote: I can't understand it. Why would someone need template programming. What problem does template solve? Well read on and see :-) Peter: Suppose you want to write a function to get the minimum of two integers. It's easy: Oh.. I see. Thank you everybody. And that's the first, more visible part of templates, a bit like generics in Java. Template are incomplete pieces of code with left-empty 'slots' which you can fill at compile-time to decide what code will be compiled. You can generate entire functions / class hierarchies or nicely crafted-for-your-need code / pre-computed-by-the-compiler code with templates. Philippe OK... I won't play with templates for now, but please keep up the good work.
Re: import std.c.windows.windows;
On Wed, Jan 11, 2012, at 01:16 PM, Mike Parker wrote: On 1/10/2012 10:57 PM, DNewbie wrote: On Tue, Jan 10, 2012, at 10:37 PM, Mike Parker wrote: Those samples use a binding to the Win32 API[1] that does not ship with DMD. So in your case, std.c.windows.windows is probably what you want for now. [1]http://dsource.org/projects/bindings/wiki/WindowsApi Ok.. I still don't understand why such a 'binding' is needed. Is std.c.windows.windows not enough for everyone? Unfortunately, no. It is not a complete binding of the Win32 API. It has a lot of stuff, but if you need more you need to look elsewhere. Andrej hit on some of the deficiencies in his post. Understood. I think I'll go with the binding. Thnk you.
Re: A tutorial on D templates
I can't understand it. Why would someone need template programming. What problem does template solve? -- D
Re: A tutorial on D templates
On Fri, Jan 13, 2012, at 11:28 PM, Peter Alexander wrote: On 13/01/12 10:48 PM, DNewbie wrote: I can't understand it. Why would someone need template programming. What problem does template solve? Suppose you want to write a function to get the minimum of two integers. It's easy: Oh.. I see. Thank you everybody.
function pointer from DLL
I've been trying to translate the following from http://www.scintilla.org/Steps.html int (*fn)(void*,int,int,int); void * ptr; int canundo; fn = (int (__cdecl *)(void *,int,int,int))SendMessage( hwndScintilla,SCI_GETDIRECTFUNCTION,0,0); ptr = (void *)SendMessage(hwndScintilla,SCI_GETDIRECTPOINTER,0,0); canundo = fn(ptr,SCI_CANUNDO,0,0); And I got a run time error while running 'fn(ptr, SCI_CANUNDO, 0, 0);': int function (void*,int,int,int) fn; fn = cast(int function(void*,int,int,int)) SendMessage( hwndScintilla, SCI_GETDIRECTFUNCTION, 0, 0); void *ptr = cast(void *)SendMessage(hwndScintilla, SCI_GETDIRECTPOINTER, 0, 0); fn(ptr, SCI_CANUNDO, 0, 0); Run time error: object.Error: Access Violation Then I've tried extern (C) int function (void*,int,int,int) fn; fn = cast(extern (C) int function(void*,int,int,int))SendMessage( hwndScintilla, SCI_GETDIRECTFUNCTION, 0, 0); Compilation error: basic type expected, not extern Could someone point me in the right direction.
Re: function pointer from DLL
On Sat, Jan 14, 2012, at 06:04 AM, Andrej Mitrovic wrote: On 1/14/12, Andrej Mitrovic andrej.mitrov...@gmail.com wrote: You can clone this: g...@github.com:AndrejMitrovic/DSciteWin.git Then just run build.bat. Sorry, I've assumed you run git, the http link is: https://github.com/AndrejMitrovic/DSciteWin Yeah! Rock'n'roll! Thank you.
import std.c.windows.windows;
I'm not sure I understand.. The page at http://dlang.org/windows.html says Instead of the: #include windows.h of C, in D there is: import std.c.windows.windows; However, the samples at https://github.com/AndrejMitrovic/DWinProgramming/tree/master/Samples use import win32.windef; import win32.winuser; My question is which one should I use in my programs? -- D
Re: import std.c.windows.windows;
On Tue, Jan 10, 2012, at 10:37 PM, Mike Parker wrote: Those samples use a binding to the Win32 API[1] that does not ship with DMD. So in your case, std.c.windows.windows is probably what you want for now. [1]http://dsource.org/projects/bindings/wiki/WindowsApi Ok.. I still don't understand why such a 'binding' is needed. Is std.c.windows.windows not enough for everyone? -- D
Re: Mixing D and C - Windows
Thank you both. I've created a D DLL [http://dlang.org/dll.html], then I've loaded it from a C program [compiled with dmc]. However, I'd want to be able to call it from a C program compiled with MSVC, and I got a link error - unresolved external symbol [link testdll.obj /implib:mydll.lib /out:testdll-msvc.exe]. The LoadLibrary works with both DMC/MSVC, but it isn't 'handy'.?. On Sat, Dec 31, 2011, at 07:20 PM, Exec wrote: Jakob Ovrum Wrote: As for loading C symbols in a DLL from a D program, you must link against an import library of the DLL, and create an interface module (similar to a header file) with the C declarations. Alternatively, you can load the DLL via the Windows API. http://msdn.microsoft.com/en-us/library/windows/desktop/ms684175%28v=vs.85%29.aspx -- D
Re: Mixing D and C - Windows
Resolved. Thanks everyone. On Tue, Jan 3, 2012, at 04:49 AM, Andrej Mitrovic wrote: Maybe I'm wrong, but IIRC objconv won't work on import libs. But there are other ways to do it: http://support.microsoft.com/kb/131313 -- D
