I have a code which uses bit-fields declared as follows typedef struct my{ const char *name; uint8_t is_alpha : 1; uint8_t is_hwaccel : 1; uint8_t x_chroma_shift; uint8_t y_chroma_shift; } mystr; uint8_t is typedef'ed to unsigned char. Building the code in MS-VS 2008 using this bit fields gives a warning a...
I have a query about data type promotion rules in C language standard. The C99 says that: C integer promotions also require that "if an int can represent all values of the original type, the value is converted to an int; otherwise, it is converted to an unsigned int." My questions is in case of a C language expression where unsigned in...
In my C++ program, I want to make sure i can write info to a file. How can I perform this check? ...
I need the simplest way from C using Win32 to get the process handle of another process by its executable file name. The process I am looking for does not have any registered window classes. I also know that if it is running there will be only one instance of it running. ...
Hello everyone, I have to submit code to one of the problems in ACM IPC and, as you may know, the time counts a lot. So, I have to read efficiently an input like this: The first line will contain the sequence of integer values associated and the second line will contain the sequence of integer values associated with another sequence. E...
I am compiling Gtk applications in Windows with MinGW toolchain, but when I run my apps, a command prompt window appears. How can I make this prompt disappear? ...
Situation: I am writing a program in C that maintains a number of threads. Once a thread ends, a new one is created. Each thread forks - the child runs a process via exec() and the parent waits for it to finish. In addition, there is a signal handler thread that waits for signals. If SIGINT is detected then it tells the main threa...
I have a 3rd party source code that I have to investigate. I want to see in what order the functions are called but I don't want to waste my time typing: printf("Entered into %s", __FUNCTION__) and printf("Exited from %s", __FUNCTION__) for each function, nor do I want to touch any source file. Do you have any suggestions? Is ther...
Hello, Compiling with gcc 4.4.2 and WinXP Visual Studio C++ 2008 #if defined ( WIN32 ) #define __FUNCTION__ __func__ #endif As I want to use the macro to display the function name. I have done the above so I can cross-platform, and use the same func when compiling on linux or windows. However, when I am compiling on WinXP I get the...
Hi, I have this strange behaviour in Apache post_config handler : int setup_module(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp,server_rec *s) { //1 my_config_t *config = ap_get_module_config(s->module_config, &my_module); //2 log_me(config->logfp, apr_psprintf(ptemp, "My module version %s\n", MY_VERSION)); ...
Arbitrage is the process of using discrepancies in currency exchange values to earn profit. Consider a person who starts with some amount of currency X, goes through a series of exchanges and finally ends up with more amount of X(than he initially had). Given n currencies and a table (nxn) of exchange rates, devise an algorithm that a pe...
Ok so i posted earlier about trying to (without any prebuilt functions) remove additional spaces so "this is <insert many spaces!> a test" would return "this is a test" http://stackoverflow.com/questions/2279679/logic-issues-help-needed As it was homework i asked for no full solutions and some kind people provided me with the fol...
Hi! I have a listview with 3 coloumns. The first two columns has values and the third one is empty yet. I want to know, how can i insert a colored text later into the third column? I don't want to color the full row, only the third column with changing colors. Thanks in advance! kampi ...
Hi guys, Is there a book that describes the design and evolution of C similiar to the book 'The Design and Evolution of C++' by Bjarne Stroustrup ? thanks, Prakash ...
I would still like to know how to pass in a null character as a command line argument, maybe so that a single string can be passed in as an argument in the form: "to\0be\0or\0not\0to\0be\0" And then parse it. However the program would treat this string as: "to\\0be\\0or\\0not\\0to\\0be\\0" How can I work around this? Is ther...
How can I get the IPv4 address of an interface in linux from C code ? e.g. I'd like to get the IP address(if any) assigned to eth0 ...
It appears that a cgi app (in C, VS C++) does not inherit the COMSPEC environmental variable. When adding the variable to the application: _putenv( "COMSPEC=C:\\WINDOWS\\system32\\cmd.exe" ); // C4996 the cgi application no longer executes from the browser but is interpreted as a file for download. (i.e. - Save this file?) My quest...
Consider the following example (a simple 2d vector lib). Here there is a single constructor function which returns an object table with methods. My issue with this approach is that it is creating new tables with every constructor. Is there a way to use a single instance of the table but change only the _data field which identifies the...
I know you can use a combination of GetLogicalDrives() and GetDiskFreeSpaceEx() to get the list of drives and their sizes. I've been using GetDiskFreeSpaceEx() with no problem but when I try to use GetLogicalDrives() I ran into a problem: I don't want to have to check each possible letter to see whether it exists or not before passing it...
I am reviewing some optimisation libraries and came across the function signature double solvopt(unsigned short n, double x[], double fun(), void grad(), double options[], double func(), void gradc() ) note that fun() and gard() are passed as function. My q...