Re: String Appender Fails (Memory Allocation Failure)
Anybody got an idea?
Re: tiny web server in D
Thank you Adam, Your code is comprehensive. I will read it closely for ideas. I seek a minimalist approach for locally run applications.
Re: Forcing compile time evaluation of pure functions
> In GCC there is a way to (sometimes) do it, see the __builtin_constant_p here: > http://www.delorie.com/gnu/docs/gcc/gcc_81.html Google code search gives about 8,100 answers: http://www.google.com/codesearch#search/&q=%22__builtin_constant_p%22&type=cs Bye, bearophile
Re: Forcing compile time evaluation of pure functions
scarrow:
> I'd really like to figure out how to have Hash("foo") be static and
> Hash(variable) be dynamic.
In GCC there is a way to (sometimes) do it, see the __builtin_constant_p here:
http://www.delorie.com/gnu/docs/gcc/gcc_81.html
Time ago I have asked for something similar in D too, because I think it allows
to implement a poor's man manual "partial compilation" using templates. Maybe
it's worth asking about this in the main D newsgroup. But before asking, it's
better to have few use cases examples :-)
Bye,
bearophile
Re: Forcing compile time evaluation of pure functions
I think invoking a template to call the pure function (StaticEval!(Hash("foo"))
isn't much different from StaticHash!("foo"). You still have to explicitly know
whether you're dealing with a compile time constant or not. I'd really like to
figure out how to have Hash("foo") be static and Hash(variable) be dynamic.
Re: Lazy and delegates - out-of-scopeness - what happens?
On 2011-07-14 20:42, Cecil ward wrote: If I pass lazy expressions or delegates to as arguments to functions, what happens with variables mentioned in the lazy expression or in the delegate body if those variables are on the stack or otherwise out of scope, or are objects that may be freed? Does the compiler partially protect the programmer from mistakes here? If anyone can comment on how these features are implemented in generated code wrt stack-allocated objects that are _in_ lexical scope in a delegate evaluation context, then I'd be interested to hear about this. They all local variables (or similar) that a delegate references will be allocated on the heap, this is also known as a closure: http://en.wikipedia.org/wiki/Closure_%28computer_science%29 -- /Jacob Carlborg
Lazy and delegates - out-of-scopeness - what happens?
If I pass lazy expressions or delegates to as arguments to functions, what happens with variables mentioned in the lazy expression or in the delegate body if those variables are on the stack or otherwise out of scope, or are objects that may be freed? Does the compiler partially protect the programmer from mistakes here? If anyone can comment on how these features are implemented in generated code wrt stack-allocated objects that are _in_ lexical scope in a delegate evaluation context, then I'd be interested to hear about this.
Re: how to raw read a struct or value?
On Thu, 14 Jul 2011 13:05:33 -0400, Steven Schveighoffer wrote:
> On Thu, 14 Jul 2011 09:36:47 -0400, Graham Fawcett
> wrote:
>
>> On Thu, 14 Jul 2011 09:01:29 +, hasnoth wrote:
>>
>>> auto file = io.File("test.txt", "rb");
>>> auto fp = file.getFP();
>>> int x;
>>> io.fread(&x, x.sizeof, 1, fp);
>>>
>>> what's the d method to do that?
>>
>> The same method:
>>
>> import core.stdc.stdio : fread;
>> fread(&x, x.sizeof, 1, fp);
>>
>> or, if you are using an array, you can use File.rawRead:
>>
>> int[10] xx;
>> f.rawRead(xx);
>
> In fact, you can read a struct/int this way too:
>
> f.rawRead((&x)[0..1]);
>
> -Steve
Aha! that makes sense. Thanks, Steve.
Graham
Re: how to raw read a struct or value?
On Thu, 14 Jul 2011 09:36:47 -0400, Graham Fawcett
wrote:
On Thu, 14 Jul 2011 09:01:29 +, hasnoth wrote:
auto file = io.File("test.txt", "rb");
auto fp = file.getFP();
int x;
io.fread(&x, x.sizeof, 1, fp);
what's the d method to do that?
The same method:
import core.stdc.stdio : fread;
fread(&x, x.sizeof, 1, fp);
or, if you are using an array, you can use File.rawRead:
int[10] xx;
f.rawRead(xx);
In fact, you can read a struct/int this way too:
f.rawRead((&x)[0..1]);
-Steve
Re: Problems with static linking of c libraries
Am 14.07.2011, 16:36 Uhr, schrieb Danny Arends : Hey all, I'm trying to build a D application which statically links in the the blas and lapack libraries (from http://icl.cs.utk.edu/lapack-for-windows/clapack/index.html ). When downloading the pre-build libraries from the website I link them in using: You save yourself a lot of hassle if you just stick with dlls on Windoze. Converting prebuilt libs has never really worked for me. And compiling them with dmc is a nightmare. But creating an import library from a dll with implib worked really well so far no matter how the code was compiled.
Problems with static linking of c libraries
Hey all, I'm trying to build a D application which statically links in the the blas and lapack libraries (from http://icl.cs.utk.edu/lapack-for-windows/clapack/index.html ). When downloading the pre-build libraries from the website I link them in using: pragma(lib, "blas"); pragma(lib, "lapack"); Compiling isn't a problem but then optlink complains: OPTLINK (R) for Win32 Release 8.00.12 Copyright (C) Digital Mars 1989-2010 All rights reserved. http://www.digitalmars.com/ctg/optlink.html blas.lib Error 43: Not a Valid Library File First I thought this was due to the fact that I was running on windows 2008 (32 bit version) but I also tried on windows XP professional, with the same result... I decided to build the libraries myself using Cmake and VisualStudio 2010, this however also has the same result: OPTLINK (R) for Win32 Release 8.00.12 Copyright (C) Digital Mars 1989-2010 All rights reserved. http://www.digitalmars.com/ctg/optlink.html blas.lib Error 43: Not a Valid Library File I am able to build the packages using the MinGW toolchain (using GNU C/CPP) however I then end up with libblas.a and liblapack.a files, which causes the linker to not find the libraries (under windows it searches for the .lib extension). renaming them leads again to the msg seen above (Not a Valid Library) Any help on how to statically link these 2 packages in my executable using windows ? Kid regards, Danny Ps. I need to avoid the use of dynamic linking
Re: tiny web server in D
std.socket is too low level for serving webpages. It just provides the means to talk on the network, but doesn't do any application protocols like http. I've written a little http server in D, but it uses linux system calls instead of std.socket, so it only works on linux. http://arsdnet.net/dcode Check out httpd.d and netman.d in there. Also, my cgi.d can work together with them to serve web apps through the mini web server. But as you can see, a lot of the code is parsing and writing http. When you go to a web site, your browser sends something like this to the server: GET /index.html HTTP/1.1 Host: mysite.com Then, the server replies: HTTP/1.1 200 OK Content-Length: 13 Content-Type: text/plain Connection: close Hello, world! Then the connection is closed and the get is complete.
Re: tiny web server in D
The program as such can regurgitate a web page provided these additional lines: string webpage = "index.html"; string output = "HTTP/1.1 200 OK\r\n Content-Type: text/html; charset=UTF-8\r\n\r \n" ~ to!string(read(webpage) ~ "\r\n"; This does not serve a page as localhost:port/webpage.html, but merely displays output on localhost:port I've been exploring std.socket for an efficient solution. It might also be desirable to get the program to open the port only on request.
Re: wrapping a void* by a ubyte[] array?
Cast to ubyte* and slice? ubyte[] array = (cast(ubyte*)pointer)[0..length]; "teo" wrote in message news:ivn0n8$14ig$1...@digitalmars.com... > Is there any way of wrapping a void* by a ubyte[] array? The void* comes > from mmap.
Re: wrapping a void* by a ubyte[] array?
On Thu, 14 Jul 2011 17:07:20 +0200, teo wrote: Is there any way of wrapping a void* by a ubyte[] array? The void* comes from mmap. byte[] array = cast(ubyte[])mmap(addr, length, ...)[0..length;] -- Simen
Re: Problems with static linking of c libraries
On 2011-07-14 17:06, Danny Arends wrote: Wow THANX, Using the COFF2OMF tool at least got me a step further, now it finds and accepts the lib files, however, it now fails with the following error: OPTLINK (R) for Win32 Release 8.00.12 Copyright (C) Digital Mars 1989-2010 All rights reserved. http://www.digitalmars.com/ctg/optlink.html lapack.lib(lapack) Offset B24AEH Record Type 009D Error 16: Index Range --- errorlevel 1 Any suggestions, on how to fix this error ? My own success have varied depending on which tool that I have used. COFF2OMF seems to be the one most appropriate with old libraries (such as VC++ 6.0 and earlier). Coffimplib only works with a few libraries, (in my own experience) and I have had least success with this tool, whilst objconv works in most cases. I would recommended to try them all and see which one that works best for you. If none of them works, try to use them on different compiled libraries (the one's on the website and the one's that you have compiled locally etc..).
Re: Problems with static linking of c libraries
Wow THANX, Using the COFF2OMF tool at least got me a step further, now it finds and accepts the lib files, however, it now fails with the following error: OPTLINK (R) for Win32 Release 8.00.12 Copyright (C) Digital Mars 1989-2010 All rights reserved. http://www.digitalmars.com/ctg/optlink.html lapack.lib(lapack) Offset B24AEH Record Type 009D Error 16: Index Range --- errorlevel 1 Any suggestions, on how to fix this error ?
wrapping a void* by a ubyte[] array?
Is there any way of wrapping a void* by a ubyte[] array? The void* comes from mmap.
Re: Problems with static linking of c libraries
You need to convert the libraries to OMF format from COFF. These are some tools which can do this: Coffimplib: http://www.digitalmars.com/ctg/coffimplib.html Coff2OMF: http://www.digitalmars.com/ctg/coff2omf.html ObjConv: http://www.agner.org/optimize/objconv.zip
Problems with static linking of c libraries
Hey all, I'm trying to build a D application which statically links in the the blas and lapack libraries (from http://icl.cs.utk.edu/lapack-for-windows/clapack/index.html ). When downloading the pre-build libraries from the website I link them in using: pragma(lib, "blas"); pragma(lib, "lapack"); Compiling isn't a problem but then optlink complains: OPTLINK (R) for Win32 Release 8.00.12 Copyright (C) Digital Mars 1989-2010 All rights reserved. http://www.digitalmars.com/ctg/optlink.html blas.lib Error 43: Not a Valid Library File First I thought this was due to the fact that I was running on windows 2008 (32 bit version) but I also tried on windows XP professional, with the same result... I decided to build the libraries myself using Cmake and VisualStudio 2010, this however also has the same result: OPTLINK (R) for Win32 Release 8.00.12 Copyright (C) Digital Mars 1989-2010 All rights reserved. http://www.digitalmars.com/ctg/optlink.html blas.lib Error 43: Not a Valid Library File I am able to build the packages using the MinGW toolchain (using GNU C/CPP) however I then end up with libblas.a and liblapack.a files, which causes the linker to not find the libraries (under windows it searches for the .lib extension). renaming them leads again to the msg seen above (Not a Valid Library) Any help on how to statically link these 2 packages in my executable using windows ? Kind regards, Danny
Re: how to raw read a struct or value?
On Thu, 14 Jul 2011 09:01:29 +, hasnoth wrote:
> auto file = io.File("test.txt", "rb");
> auto fp = file.getFP();
> int x;
> io.fread(&x, x.sizeof, 1, fp);
>
> what's the d method to do that?
The same method:
import core.stdc.stdio : fread;
fread(&x, x.sizeof, 1, fp);
or, if you are using an array, you can use File.rawRead:
int[10] xx;
f.rawRead(xx);
Graham
Re: A problem with const
I don't think there's a bug report specifically on this. "bearophile" wrote in message news:ivmigl$98a$1...@digitalmars.com... > Daniel Murphy: > >> Yeah, type deduction with modifiers is inconsistent. >> >> In some cases matching T to const(U) gives U == tailconst(T), but not in >> others. >> The problem exists with pointers, arrays, and (if we ever get it) Michel >> Fortin's const(Object)ref. > > Is this already in Bugzilla, or do you want me to create a new Bugzilla > enhancement request with my examples? > > Bye, > bearophile
Re: A problem with const
Daniel Murphy: > Yeah, type deduction with modifiers is inconsistent. > > In some cases matching T to const(U) gives U == tailconst(T), but not in > others. > The problem exists with pointers, arrays, and (if we ever get it) Michel > Fortin's const(Object)ref. Is this already in Bugzilla, or do you want me to create a new Bugzilla enhancement request with my examples? Bye, bearophile
Re: A problem with const
Yeah, type deduction with modifiers is inconsistent.
In some cases matching T to const(U) gives U == tailconst(T), but not in
others.
The problem exists with pointers, arrays, and (if we ever get it) Michel
Fortin's const(Object)ref.
A big part of the problem is that it can match with implicit conversions,
but the type is never actually converted.
eg.
is(shared(int*) T : const(U), U) should match and give U ==
shared(const(int)*)
"bearophile" wrote in message
news:ivmd15$2vp2$1...@digitalmars.com...
>A D2 program:
>
>
> T[] foo(T)(const T[] x) {
>//static assert(is(U == int)); // false
>static assert(is(T == const(int)));
>return new T[1];
> }
> U[] bar(U)(const U[] y) {
>static assert(is(U == int));
>return foo(y);
> }
> void main() {
>bar([1]);
> }
>
>
> DMD 2.054 gives:
> test.d(8): Error: cannot implicitly convert expression (foo(y)) of type
> const(int)[] to int[]
> test.d(11): Error: template instance test.bar!(int) error instantiating
>
>
> Do you know why T of foo is const(int) instead of int? Isn't the "const"
> of foo(T)(const T[] x) de-structuring the const nature of x? Is is
> possible to change/"fix" this?
>
> This causes me problems because many of my functions have "in" arguments.
> When they call each other they don't compile, as in this example (here I
> have used "const" arguments just for clarity).
>
>
> I have had to use code like this:
>
> Unqual![] foo(T)(const T[] x) {
>return new Unqual!T[1];
> }
> U[] bar(U)(const U[] y) {
>return foo(y);
> }
> void main() {
>bar([1]);
> }
>
> Bye and thank you,
> bearophile
A problem with const
A D2 program:
T[] foo(T)(const T[] x) {
//static assert(is(U == int)); // false
static assert(is(T == const(int)));
return new T[1];
}
U[] bar(U)(const U[] y) {
static assert(is(U == int));
return foo(y);
}
void main() {
bar([1]);
}
DMD 2.054 gives:
test.d(8): Error: cannot implicitly convert expression (foo(y)) of type
const(int)[] to int[]
test.d(11): Error: template instance test.bar!(int) error instantiating
Do you know why T of foo is const(int) instead of int? Isn't the "const" of
foo(T)(const T[] x) de-structuring the const nature of x? Is is possible to
change/"fix" this?
This causes me problems because many of my functions have "in" arguments. When
they call each other they don't compile, as in this example (here I have used
"const" arguments just for clarity).
I have had to use code like this:
Unqual![] foo(T)(const T[] x) {
return new Unqual!T[1];
}
U[] bar(U)(const U[] y) {
return foo(y);
}
void main() {
bar([1]);
}
Bye and thank you,
bearophile
how to raw read a struct or value?
auto file = io.File("test.txt", "rb");
auto fp = file.getFP();
int x;
io.fread(&x, x.sizeof, 1, fp);
what's the �d method� to do that?
