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  • Endian check in C

    - by webgenius
    Got this code snippet from some website: int num = 1; if(*(char *)&num == 1) { printf("\nLittle-Endian\n"); } else { printf("Big-Endian\n"); } Can anyone explain this step-by-step? &num - Adress of a (char *)&num - Type-cast address of a into a string *(char *)&num - Points to the first character of the string Am I missing anything here?

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  • Matching unmatched strings based on a unknown pattern

    - by Polity
    Alright guys, i really hurt my brain over this one and i'm curious if you guys can give me any pointers towards the right direction i should be taking. The situation is this: Lets say, i have a collection of strings (let it be clear that the pattern of this strings is unknown. For a fact, i can say that the string contain only signs from the ASCII table and therefore, i dont have to worry about weird Chinese signs). For this example, i take the following collection of strings (note that the strings dont have to make any human sence so dont try figguring them out :)): "[001].[FOO].[TEST] - 'foofoo.test'", "[002].[FOO].[TEST] - 'foofoo.test'", "[003].[FOO].[TEST] - 'foofoo.test'", "[001].[FOO].[TEST] - 'foofoo.test.sample'", "[002].[FOO].[TEST] - 'foofoo.test.sample'", "-001- BAR.[TEST] - 'bartest.xx1", "-002- BAR.[TEST] - 'bartest.xx1" Now, what i need to have is a way of finding logical groups (and subgroups) of these set of strings, so in the above example, just by rational thinking, you can combine the first 3, the 2 after that and the last 2. Also the resulting groups from the first 5 can be combined in one main group with 2 subgroups, this should give you something like this: { { "[001].[FOO].[TEST] - 'foofoo.test'", "[002].[FOO].[TEST] - 'foofoo.test'", "[003].[FOO].[TEST] - 'foofoo.test'", } { "[001].[FOO].[TEST] - 'foofoo.test.sample'", "[002].[FOO].[TEST] - 'foofoo.test.sample'", } { "-001- BAR.[TEST] - 'bartest.xx1", "-002- BAR.[TEST] - 'bartest.xx1" } } Sorry for the layout above but indenting with 4 spaces doesnt seem to work correctly (or im frakk'n it up). Anyways, I'm not sure how to approach this problem (how to get the result desired as indicated above). First of, i thought of creating a huge set of regexes which would parse most known patterns but the amount of different patterns is just to huge that this isn't realistic. Another think i thought of was parsing each indidual word within a string (so strip all non alphabetic or numeric characters and split by those), and if X% matches, i can assume the strings belong to the same group. (where X wil probably be around 80/90). However, i find the area of speculation kinda big. For example, when matching strings with each 20 words, the change of hitting above 80% is kinda big (that means that 4 words can differ), however when matching only 8 words, 2 words at most can differ. My question to you is, what would be a logical approach in the above situation? Thanks in advance!

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  • Bitshift in javascript

    - by pingvinus
    I've got a really big number: 5799218898. And want to shift it right to 13 bits. So, windows-calculator or python gives me: 5799218898 13 | 100010100100001110011111100001 13 70791 | 10001010010000111 As expected. But Javascript: 5799218898 13 | 100010100100001110011111100001 13 183624 | 101100110101001000 I think it because of internal integer representation in javascript, but cannot find anything about that.

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  • Is Collections.shuffle suitable for a poker algorithm?

    - by Kovu
    Hi, there is a poker-system in java, that uses Collections.shuffle() on all available cards before the cards are dealt. So a collection of 52 cards 2-9, J, Q, K, A in 4 types. After that we Collections.shuffle(). The problem is, that it seems (until now we didn't have big statistic, it's possible that we only see a lot of statistic inferences), that the algorithm is VERY unclearly. So, is Collections.shuffle() okay for a poker algorithm?

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  • what localization changes are needed for Arabic with Java Applet

    - by Tom
    How big task is it to implement support for Arabic localization, our Java 1.5 Applet was designed as fully localizable (european languages) but now we plan to add also arabic as a new language. We are using custom GUI text i/o components inherited from Component class using e.g. Drawstring, how well is arabic supported within Component class ? The keyboard input is done with KeyListener getKeyChar, getKeyCode etc.

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  • SSL Returning Blank Page, No Catalina Errors

    - by Mr.Peabody
    This is my second, maybe third, time configuring SSL with Tomcat. Earlier I had created a self signed, which worked, and now using my signed is proving fruitless. I am using Tomcat, operating from the Amazon Linux API. When using the signed cert/keystore, my server is starting normally without errors. However, when trying to navigate to the domain it is giving me an "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" error. My server.xml file looks as follows: <Connector port="8443" maxHttpHeaderSize="8192" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" disableUploadTimeout="true" acceptCount="100" scheme="https" secure="true" SSLEnabled="true" clientAuth="false" sslProtocol="TLS" keystoreFile="/home/ec2-user/.keystore/starchild.jks" keystorePass="d6b5385812252f180b961aa3630df504" /> It couldn't hurt to also mention that I'm using a wildcard certificate. Please let me know if anything looks amiss! EDIT: After looking more into this, I've determined there may be nothing is wrong with the Server.xml, or the listening ports. This is becoming more of an actual certificate error, as the curl request is giving me this error: curl: (35) Unknown SSL protocol error in connection to jira.mywebsite.com:-9824 Though, I can't seem to figure out what the "-9824" is. When comparing this curl to another similar setup (using the same Wildcard Certificate) it's turning up the full handshake, which is to be expected. I believe this is now between the protocol/cypher set default on JIRA servers.

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  • Do WordPress widget (or sidebar) hooks exist?

    - by Jeff
    I'm trying to filter ALL widget output through a simple filter, but can't find any hooks and was hoping to be pointed in the right direction. Or possibly my efforts are not even possible? My simple filter is something like this: function clean_widget_output( $input ) { return str_replace( array( "\t", "\n", "\r" ), '', $input ); } add_[FILTER OR ACTION]( 'need_a_hook', 'clean_widget_output', 99 ); Any ideas? I'm pretty new to PHP, but I can get around.

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  • mingw 3.4.5 missing dlfcn.h?

    - by lurscher
    Hi, is it possible that my mingw 3.4.5 installation is faulty? or is this provided on some other library floating around? in case you are wondering, dlfcn.h is where stuff like dlopen and dlclose are defined, so it should be pretty standard

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  • Yahoo OAuth question

    - by ben
    Hi, I'm keep getting oauth_problem=consumer_key_unknown error when trying oauth https://api.login.yahoo.com/oauth/v2/get_request_token I'm pretty sure my consumer key is correct because it works locally (Runs via 127.0.0.1). Just keep giving me oauth_problem=consumer_key_unknown when I try it on my server. Any ideas?

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  • An autoformat tool to automatically insert braces around single-line clauses?

    - by Brian Deacon
    So assuming that in our work environment we've decided that the One True Faith forbids this: if (something) doSomething(); And instead we want: if (something) { doSomething(); } Is there a tool that will do that automagically? Awesomest would be to have eclipse just do it, but since we're really just recovering from one ex-employee that thought he was too pretty for coding conventions, a less-friendly tool that would do it right just once would suffice.

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  • CDNs and domains

    - by Martind
    Hi all! A lot of big websites (facebook etc) are settings up CDN's for their content. Now I notice, that these CDN's are not always on the original domain. Example: Facebook pictures are on "photos-a.ak.fbcdn.net" Why is that? Is there a performance-gain in not having lots of subdomains on the "primary" domain (facebook.com)

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  • tableSorter limitation (sort) one page at a time?

    - by Abu Hamzah
    i see that in tableSorter you can sort one page at a time which concerns me. Only 1 page of results can be sorted at a time?, which is pretty limiting. If you have a query result that spans multiple pages, how you will handle this? If anyone knows better, feel free to correct me if iam incorrect Thanks.

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  • Marshal.PtrToStructure (and back again) and generic solution for endianness swapping

    - by cgyDeveloper
    I have a system where a remote agent sends serialized structures (from and embedded C system) for me to read and store via IP/UDP. In some cases I need to send back the same structure types. I thought I had a nice setup using Marshal.PtrToStructure (receive) and Marshal.StructureToPtr (send). However, a small gotcha is that the network big endian integers need to be converted to my x86 little endian format to be used locally. When I'm sending them off again, big endian is the way to go. Here are the functions in question: private static T BytesToStruct<T>(ref byte[] rawData) where T: struct { T result = default(T); GCHandle handle = GCHandle.Alloc(rawData, GCHandleType.Pinned); try { IntPtr rawDataPtr = handle.AddrOfPinnedObject(); result = (T)Marshal.PtrToStructure(rawDataPtr, typeof(T)); } finally { handle.Free(); } return result; } private static byte[] StructToBytes<T>(T data) where T: struct { byte[] rawData = new byte[Marshal.SizeOf(data)]; GCHandle handle = GCHandle.Alloc(rawData, GCHandleType.Pinned); try { IntPtr rawDataPtr = handle.AddrOfPinnedObject(); Marshal.StructureToPtr(data, rawDataPtr, false); } finally { handle.Free(); } return rawData; } And a quick example structure that might be used like this: byte[] data = this.sock.Receive(ref this.ipep); Request request = BytesToStruct<Request>(ref data); Where the structure in question looks like: [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)] private struct Request { public byte type; public short sequence; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)] public byte[] address; } What (generic) way can I swap the endianness when marshalling the structures? My need is such that the locally stored 'public short sequence' in this example will be little-endian for displaying to the user. I don't want to have to swap the endianness on a structure-specific way. My first thought was to use Reflection, but I'm not very familiar with that feature. Also, I hoped that there would be a better solution out there that somebody could point me towards. Thanks in advance :)

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  • NSXMLParser + encoding="windows-1257"

    - by Moze
    So i'm making small program and it download ziped XML database file that is ~30 MB size (unziped). As I understand there is only way with such big files on iPhone, it's to use NSXMLParser. But that file is encoded with windows-1257 format and NSXMLParser does not eat files like that. What can I do? Is there a way to change file encoding on iphone or make NSXMLParser work with other then UTF8 encoded files?

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  • Unfamiliar notation found in a computer science book

    - by cornjuliox
    I'm reading through this computer science book and throughout the book I see a number of things written like so: and then there's this: and then this: What kind of notation is the "Boolean Expression" in example 1 written in? I've never seen anything like it before and I'm tempted to assume that whoever wrote and/or scanned this book in fell asleep at the keyboard, and assuming that it's even valid, what about the 3rd example? I'm pretty sure that's not C++ or VB.NET they're showing there.

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  • c declaring variables in blocks

    - by anon
    I know that in C++, I can declare variables pretty much everywhere. I recall once reading that in C, variables must be declared at the top of a function i.e. the following is invalid: void foo() { int good; if (...) { int bad; } } In the above code, is the declaraing of the bad varaible legal by C standards, or only legal due to a gcc extension? Thanks!

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  • Post microphone input from Flash to server

    - by Seb
    We're trying to get microphone input in a Flash movie and the post it to the server so it can be saved in a file. Currently, we're using PHP in the server, but I guess the key thing here is: How to post the audio to the server? After a post is made, then I guess it'd be a matter of handling the encoding and saving to a file, which can be done with pretty much any server-side language. Any idea if this is at all possible?

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  • PHP Simple dynamic breadcrumb

    - by Adrian
    Hello, I think this script is of big interest to any noob around here :) including me :) What I want to create is a little code that I can use in any file and will generate a breadcrumb like this: If the file is called "website.com/templates/index.php" the breadcrumb should show: Website.com Templates ^^ link ^^plain text If the file is called "website.com/templates/template_some_name.php" the breadcrumb should show: Website.com Templates Template Some Name ^^ link ^^link ^^plain text I am grateful for any reply, thanks!

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  • Two DHCP servers on the same network

    - by CesarGon
    We are setting up a routing link between the Windows Server 2008 networks of two different buildings in my organisation. Each network uses a different IP addressing scheme (one uses public addresses, the other one uses private), but the goal is having a single Windows Server domain across the gap between the buildings. The link is provided by a 100-Mbps point-to-point line. I have always understood that you should not have more than one DHCP server on a network. However, we are planning to put a domain controller on each building, and each domain controller will be a DNS server and a DHCP server as well. The intention is that a machine booting up in building A gets its IP address from the DHCP server closer to it, in building A, while a machine booting up in building B gets an address from the DHCP server in building B. Since the two buildings will be linked and the network will be only one, will this work? How can I avoid that a machine booting up in building A gets an address from the DHCP server in building B (or vice versa)? Thanks.

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