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  • Make compiler copy characters using movsd

    - by Suma
    I would like to copy a relatively short sequence of memory (less than 1 KB, typically 2-200 bytes) in a time critical function. The best code for this on CPU side seems to be rep movsd. However I somehow cannot make my compiler to generate this code. I hoped (and I vaguely remember seeing so) using memcpy would do this using compiler built-in instrinsic, but based on disassembly and debugging it seems compiler is using call to memcpy/memmove library implementation instead. I also hoped the compiler might be smart enough to recognize following loop and use rep movsd on its own, but it seems it does not. char *dst; const char *src; // ... for (int r=size; --r>=0; ) *dst++ = *src++; Is there some way to make the Visual Studio compiler to generate rep movsd sequence other than using inline assembly?

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  • Get address bar without paramentrs.

    - by kalininew
    Help me please get the value of the address bar of browser without the parameters passed. Without the use of regular expressions and string functions. You can do this? (I use php on apache). enter http://dev.mazda-parts.ru/catalogue/?spattern=1 exit http://dev.mazda-parts.ru/catalogue/

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  • Function lfit in numerical recipes, providing a test function

    - by Simon Walker
    Hi I am trying to fit collected data to a polynomial equation and I found the lfit function from Numerical Recipes. I only have access to the second edition, so am using that. I have read about the lfit function and its parameters, one of which is a function pointer, given in the documentation as void (*funcs)(float, float [], int)) with the help The user supplies a routine funcs(x,afunc,ma) that returns the ma basis functions evaluated at x = x in the array afunc[1..ma]. I am struggling to understand how this lfit function works. An example function I found is given below: void fpoly(float x, float p[], int np) /*Fitting routine for a polynomial of degree np-1, with coe?cients in the array p[1..np].*/ { int j; p[1]=1.0; for (j=2;j<=np;j++) p[j]=p[j-1]*x; } When I run through the source code for the lfit function in gdb I can see no reference to the funcs pointer. When I try and fit a simple data set with the function, I get the following error message. Numerical Recipes run-time error... gaussj: Singular Matrix ...now exiting to system... Clearly somehow a matrix is getting defined with all zeroes. I am going to involve this function fitting in a large loop so using another language is not really an option. Hence why I am planning on using C/C++. For reference, the test program is given here: int main() { float x[5] = {0., 0., 1., 2., 3.}; float y[5] = {0., 0., 1.2, 3.9, 7.5}; float sig[5] = {1., 1., 1., 1., 1.}; int ndat = 4; int ma = 4; /* parameters in equation */ float a[5] = {1, 1, 1, 0.1, 1.5}; int ia[5] = {1, 1, 1, 1, 1}; float **covar = matrix(1, ma, 1, ma); float chisq = 0; lfit(x,y,sig,ndat,a,ia,ma,covar,&chisq,fpoly); printf("%f\n", chisq); free_matrix(covar, 1, ma, 1, ma); return 0; } Also confusing the issue, all the Numerical Recipes functions are 1 array-indexed so if anyone has corrections to my array declarations let me know also! Cheers

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  • Naming Suggestions For A Function Providing Method Chaining In A Different Way

    - by sid3k
    I've coded an experimental function which makes passed objects chainable by using high order functions. It's name is "chain" for now, and here is a usage example; chain("Hello World") (print) // evaluates print function by passing "Hello World" object. (console.log,"Optional","Parameters") (returnfrom) // returns "Hello World" It looks lispy but behaves very different since it's coded in a C based language, I don't know if there is a name for this idiom and I couldn't any name more suitable than "chain". Any ideas, suggestions?

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  • How do you use stereotype annotations in Spring 2.5.x?

    - by grigory
    When moving to Spring 2.5.x I found that it adds more stereotype annotations (on top of @Repository from 2.0): @Component, @Service and @Controller. How do you use them? Do you rely on implicit Spring support or you define custom stereotype specific functions/aspects/features? Or is it predominately for marking beans (compile time, conceptual, etc.)?

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  • Windows - put HDD stand-by and sleep mode

    - by iulianchira
    How can I put a hard disk drive in stand-by or sleep mode in Windows, in a programmatic manner. Does the Windows API or any .Net libraries provide any functions to achieve this? (I am aware that I should probably not interfere with Windows's power management mechanism, but this is not something I intend to use in a production environment, it is a proof of concept for some algorithms).

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  • SQL Server backward compatibility in Entity Framework?

    - by shake
    Is there any backward compatibility in the entity framework between SQL Server 2008 and 2005? It seems the framework forces you to use the same provider for all the .edmx files in a solution. If you use the 2008 provider, data types like DateTime2 and functions like SysDateTime that are emitted by the framework to the underlying SQL query make it useless to use them against a SQL 2005 Server. Any way around this?

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  • conversion of a varchar to a smalldatetime results in an out-of-range value

    - by michael
    The code: strSql = "insert into table2 (transactiondate) values ('" & transactiondate & "')" seems to be giving me the runtime error: The conversion of a varchar data type to a smalldatetime data type resulted in an out-of-range value In the code, strSql is a String object and transactiondate is a Date object. In the SQL database however, transactiondate is a smalldatetime object. I've tried changing the smalldatetime to a datetime (in the database) and I've tried transactiondate.toString() but with no success. How can this be fixed? Note: I know about the dangers of inline SQL. I am looking for a quick fix solution here and not a discussion about SQL injection.

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  • Vertical Align Issue

    - by Nasser Hajloo
    I have following styles which work greate but Vertical-Align:middle or bottom doesn't work in it. every thing inside goes top ofthe div .Progress { display: inline-block; z-index: 1000; width:auto; height: auto; background-color: #A9C646; vertical-align: bottom; text-align: center; text-align: -moz-center; !text-align: center; position: absolute; opacity: 0.4; filter: alpha(opacity = 40); }

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  • Function pointers with default parameters in C++

    - by user308926
    How does C++ handle function pointers in relation to functions with defaulted parameters? If I have: void foo(int i, float f = 0.0f); void bar(int i, float f); void (*func_ptr1)(int); void (*func_ptr2)(int, float); void (*func_ptr3)(int, float = 10.0f); Which function pointers can I use in relation to which function?

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  • #if 0 as a define

    - by valerio
    I need a way to define a FLAGS_IF macro (or equivalent) such that FLAGS_IF(expression) <block_of_code> FLAGS_ENDIF when compiling in debug (e.g. with a specific compiler switch) compiles to if (MyFunction(expression)) { <block_of_code> } whereas in release does not result in any instruction, just as it was like this #if 0 <block_of_code> #endif In my ignorance on the matter of c/c++ preprocessors i can't think of any naive way (since #define FLAGS_IF(x) #if 0 does not even compile) of doing this, can you help? I need a solution that: Does not get messed up if */ is present inside <block_of_code> Is sure to generate 0 instructions in release even inside inline functions at any depth (i guess this excludes if (false){<block_of_code>} right?) Is standard compliant if possible Thank you

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  • Visual Studio's CSS Intellisense - Absolute paths & MasterPage files

    - by Overflew
    Hi there. I've noticed that to get CSS-Intellisense working in VS, the paths have to be relative - Is this the case? However, it seems <link href="/resources/test.css" [...] /> is far more practical than <link href="resources/test.css" [...] /> I'm including the CSS in the master page, and don't see much good in including it as a content block, just to get the relative paths correct for each directory depth. I've had a quick try with inline code resolving the path, but no dice there either (for Intellisense). I feel I'm missing something fairly simple - What's the correct approach here to have CSS Intellisense work across the pages in the app during dev, and render fine in any deployed state? Cheers. (Note - I'm aware that a <% if (false) { % type hack is required for user controls)

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  • GCD function in matlab

    - by SalemFayad
    hi, i am looking for a way to implement the "gcd" function used in matlab in another language but i really cant understand the way it functions. it says in http://www.mathworks.com/access/helpdesk/help/techdoc/ref/gcd.html that: "[G,C,D] = gcd(A,B) returns both the greatest common divisor array G, and the arrays C and D, which satisfy the equation: A(i).*C(i) + B(i).*D(i) = G(i)." but it says nothing about how it calculates C and D. i would be grateful if someone has a clearer idea about this subject! thanks:)

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  • Javascript/jQuery height calculation

    - by danit
    Im looking for a way, in javascript, to calculate the size of the browser (px) then calculate the size of a <div> taking away 50px from that full screen size: E.g. Browser screen size: 800px (Height) Existing <div> that is always 50px (Height) Leaves 750px (Height) for the remaining <div> to fill the page. Then take that 750px and apply it as inline style: <div style="height: 50px"> <img src="banner.png" /> </div> <div style="height: x"> This fills the remainder of the page </div>

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  • How do I subvert computer idle detection on Windows?

    - by sharptooth
    In order to detect user absence GetLastInputInfo() can be used. I want to make GetLastInputInfo() return that I've just used keyboard/mouse all the time - as I've been actively using the computer so that whoever relies on GetLastInputInfo() thinks I'm actively using the computer. Can I use any Windows API functions to achieve that?

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  • Externalize Javascript in YAP

    - by Haseeb Khan
    I am working on a Yahoo! App which requires certain external Javascript Frameworks to be loaded and used. Also in the Yahoo! App Best Practices Guide, it is also mentioned that the sources should be externalized, however, externalization isn't working for me. I am using the standard procedure to load the external JS file like the following: <script src="http://www.google.com/js/nxsl.1.js"></script> But the above statement is giving me an error that external sources are not allowed. Is there any way to use external JS files as I don't want to include all of my JS Login inline, it doesn't make sense to me and majorly my code won't be re-usable. Any thoughts ?

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  • How to define an alias in fish shell?

    - by armandino
    I would like to define some aliases in fish. Apparently it should be possible to define them in ~/.config/fish/functions but they don't get auto loaded when I restart the shell. Any ideas? p.s. if anyone is using or has used fish in the past I'd be interested to hear your comments as to whether it offers anything that bash does not.

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  • missing .cs files in precompiled website with c# in asp.net

    - by Greg
    Hi, I need to change the code of some asp.net application but the application is missing its .cs files, there are only .aspx files. As I read in google, I understand that the application is a precompiled website. I am not too familiar with it so the question is, can I somehow retrieve the code-behind .cs files of this application because I need to change some functions there. Surely there is a way I can access them or retrieve them somehow? Thanks in advance, Greg

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  • Get sum of two columns in one LINQ query

    - by Axarydax
    Hi, let's say that I have a table called Items (ID int, Done int, Total int) I can do it by two queries: int total = m.Items.Sum(p=>p.Total) int done = m.Items.Sum(p=>p.Done) But I'd like to do it in one query, something like this: var x = from p in m.Items select new { Sum(p.Total), Sum(p.Done)}; Surely there is a way to call aggregate functions from LINQ syntax...?

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