I am having trouble understanding the terms of the LGPL in light of a program that is not written in C or C++. They speak of libraries being linked and 'derivitive' works. If I were to package a php program and sell it, but within the program the deployment mechanism used the phing package (full up with the entire contents as is and un...
I have some code which is built both on Windows and Linux. Linux at this point is always 32bit but Windows is 32 and 64bit. Windows wants to have time_t be 64 bit and Linux still has it as 32 bit. I'm fine with that, except in some places time_t values are converted to strings. So when time_T is 32 bit it should be done with %d and w...
Can C/C++ be choice of keeping all your logic (business/domain) for web application? Why? I've two resources (cousins) having knowledge on C/C++ and me also good in C/C++, Python, HTML, CSS and JavaScript. We like to utilize our free time to work on our some good ideas we developed together. The ideas require knowledge of web applica...
Hi I am trying to do a chunked response (of large files) in libevent this way:: evhttp_send_reply_start(request, HTTP_OK, "OK"); int fd = open("filename", O_RDONLY); size_t fileSize = <get_file_size>; struct evbuffer *databuff = NULL; for (off_t offset = 0;offset < fileSize;) { databuff = evbuffer_new(); size_t bytesLeft = f...
I have a known shared folder on another Windows PC and i have to transfer files using my ANSI C program to that shared folder using an FTP connection. I need some directions - please guide me. ...
Hi my code extern int docx(char *,char[][]) // in a header file it is compiled in solaries properly. but in redhat linux it shows bellow error. array type has incomplete element type. i know i can solve it as - char[][20] is it the right way. ...
Hi, i have been given some code to work out big o runtimes on them, could someone tell me if i am on the right track or not?? //program1 int i, count = 0, n = 20000; for(i = 0; i < n * n; i++) { count++; } Is that O(n^2)? //number2 int i, inner_count = 0, n = 2000000000; for(i = 0; i < n; i++) { inner_count++;...
Hi - I have a function that recursively makes some calculations on a set of numbers. I want to also pretty-print the calculation in each recursion call by passing the string from the previous calculation and concatenating it with the current operation. A sample output might look like this: 3 (3) + 2 ((3) + 2) / 4 (((3) + 2) / 4) x 5 (((...
Hi, I have bit field declared this way: typedef struct morder { unsigned int targetRegister : 3; unsigned int targetMethodOfAddressing : 3; unsigned int originRegister : 3; unsigned int originMethodOfAddressing : 3; unsigned int oCode : 4; } bitset; I also have int array, and i want to get int value from this array...
AFAIK, freeing a NULL pointer will result in nothing. I mean nothing is being done by the function free. Still, I do see some statements where people say that one of the scenarios where memory corruption can occur is "freeing memory twice". Is this still true? ...
Are the "modify" operators like +=, |=, &= etc atomic? I know ++ is atomic (if you perform x++; in two different threads "simultaneously", you will always end up with x increased by 2, as opposed to x=x+1 with optimization switched off.) What I wonder is whether variable |= constant, and the likes are thread-safe or do I have to protec...
Hello everyone, i had a question in my program. When I pass the 3D int array CodedGreen to the function Green_Decode_Tree. An error message"invalid use of array with unspecified bounds" displayed. What is the mistake in my program? Thanks for your help. for(i=0;i<256;i++){ for(j=0;j<256;j++){ Decode_Tree(green[0], CodedGre...
How should I manage memory in my mission critical embedded application? I found some articles with google, but couldn't pinpoint a really useful practical guide. The DO-178b forbids dynamic memory allocations, but how will you manage the memory then? Preallocate everything in advance and send a pointer to each function that needs alloc...
Hi Is there any plugins or built-in method in vim for performing refactoring on c or c++ code, something like the refactoring tools in eclipse? I'm especially keen on the extract method refactoring tool from eclipse that will determine parameters from new method and typically also guess a variable to use as return value. ...
Hi everyone! I've recently got interested in Linux network programming and read quite a bit (Beej's Guide to Network Programming). But now I'm confused. I would like to write something to have some practice, but I don't know what exactly. Could please recommend me a couple of projects to start with? Thanks. ...
Is there any way to access the command line arguments, without using the argument to main? I need to access it in another function, and I would prefer not passing it in. I need a solution that only necessarily works on Mac OS and Linux with GCC. ...
Hi everybody I am developing an application to process geophysical signals; Right now I have done everything in octave and its digital signal processing toolbox, speed is not bad, however the application specifications say I need to port to the final algorithm to C; I am doing lots of filtering, re-sampling and signal manipulation/chara...
Hi, After implementing most of the common and needed functions for my Graph implementation, I realized that a couple of functions (remove vertex, search vertex and get vertex) don't have the "best" implementation. I'm using adjacency lists with linked lists for my Graph implementation and I was searching one vertex after the other unti...
i am using pcap to create a packet sniffer. i have this tcp structure: typedef struct TSP_header{ unsigned short int sport; unsigned short int dport; unsigned int seqnum; unsigned int acknum; unsigned char reserved:4, offset:4; unsigned int tcp_res1:4, //little-endian ...
A previous programmer preferred to generate large lookup tables (arrays of constants) to save runtime CPU cycles rather than calculating values on the fly. He did this by creating custom Visual C++ projects that were unique for each individual lookup table... which generate array files that are then #included into a completely separate A...