Hello. I'm wondering if there's an easy way to iterate through a fd_set? The reason I want to do this is to not having to loop through all connected sockets, since select() alters these fd_sets to only include the ones I'm interested about. I also know that using an implementation of a type that is not meant to be directly accessed is ge...
I'm working with legacy embedded C code which defines the types uint8_t, uint16_t and uint32_t in a header file using the typedef keyword. For discussion, let us say the file typedefs.h contains these definitions. In my new C source module, I include stdint.h. I also include other header files which include typedefs.h somewhere in t...
Guys, got the answer in C ; THank you for all the help . Hey , I did go through the other threads on this(ADDREV Problem )(https://www.spoj.pl/problems/ADDREV/ ) but sadly, i am not able to get an answer by any of the three programs that i have written. ( in C , python and java ) . I am attaching the code snippets of all three. T...
Possible Duplicate: Why does C++ support memberwise assignment of arrays within structs, but not generally? Why is it that we can assign the object of one structure to other directly eg: struct student s1,s2; s2=s1 //is perfectly ok. but we can not assign one array value to the other eg: int a[10],b[10]; a=b //is not all...
I know that in C, for if statements and comparisons FALSE = 0 and anything else equals true. Hence, int j = 40 int k = !j k == 0 // this is true My question handles the opposite. What does !0 become? 1? int l = 0 int m = !l m == ? // what is m? ...
Follow up question to my pervious question: http://stackoverflow.com/questions/3579860/conditional-wait-with-pthreads I changed my code to use semaphores instead of mutex locks and conditional signals. However, I seem to have run in to a condition that I cannot explain. Here is the abstract function thread work { while (true) s...
I'm trying to debug a C/C++ native DLL project from Visual Studio 2010. I'm attempting to follow these instructions: http://msdn.microsoft.com/en-us/library/c91k1xcf(v=VS.100).aspx I want to use the built-in debugger and be able to step code, examine structures, etc. as I would do with a regular .exe project. The instructions on the pag...
I'm it really sure how to explain this question but i'll give it a try. I have this line of code in my program: scanf (" %c", &character); Notice the space before %c. This is supposed to keep the scanf from interpreting the last ENTER key as a character. This works, however after this line and its resulting printf output the program w...
chdir can be used for constant character paths (it takes a const char *), but not for paths inputted by the user (since they have type char *). Is there any way around this? ...
I'm getting loads of errors like these: gfx.h:48: error: syntax error before 'buffer' gfx.h:48: warning: type defaults to 'int' in declaration of 'buffer' gfx.h:48: warning: data definition has no type or storage class gfx.h:73: error: syntax error before 'uint16_t' gfx.h:73: warning: no semicolon at end of struct or union gfx.h:74...
Suppose I want to completely take over the open() system call, maybe to wrap the actual syscall and perform some logging. One way to do this is to use LD_PRELOAD to load a (user-made) shared object library that takes over the open() entry point. The user-made open() routine then obtain the pointer to the glibc function open() by dlsym()i...
Hello guys, I am interested in Android kernel level programming. Actually I am a Linux kernel programmer. I would like to know how to start with the kernel and how compile, boot and about the Kernel level subsystems (EX: How file systems are implemented etc..) in Android. Any books or articles or a good guide to start are very much ap...
I have this SphereInFrustrum function here: 0.49% int FrustumG::sphereInFrustum(Vec3 &p, float radius) { int result = INSIDE; float distance; 2.40% for(int i=0; i < 6; i++) { 7.94% distance = pl[i].distance(p); 12.21% if (distance < -radius) 0.67% return OUTSIDE; 3.67% else if (distance < ...
The following code is producing a warning when I compile it on 32-bit systems: 1087: warning: integer constant is too large for "long" type; how can I fix this so I don't get that warning and it works correctly on 32-bit? A valid input for this is: unsigned char str[] = "\x00\x17\x7c\x3a\x67\x4e\xcb\x01"; and the mypow function retur...
Hello, I am trying to make my program ignore ctrl-c in unix which seems to work, the issue is that it keep writing "Syntax error". Here is the code extern "C" void ignore( int sig ) { fprintf( stderr, "\n"); // Print a new line // This function does nothing except ignore ctrl-c } int main() { // For ...
I have to compile a .c file that came with a matlab toolbox. To this end I downloaded xcode 3.1.4, and now I am trying commands like gcc -o solvemc solvemc.c and getting errors like Undefined symbols: "_N_VFree", referenced from: _main in cca0ChgX.o _main in cca0ChgX.o _main in cca0ChgX.o _main in cca0ChgX....
I', using GL_FOG, but it really only fogs up my geometry, I would like a way for the fog to feel like it encumbers an area, not just fog up my geometry, sort of like a box of fog... Is there a way to do this? Or possibly another way to give a smooth draw distance transition? Thanks ...
Is there a way to make the msvc compiler as strict as gcc? MSVC lets me do some pretty crazy things that result in hundreds of errors when I compile in linux. Thanks ...
how to compare two strings in C? Help me, I am beginner@@ char *str1 = "hello"; char *str2 = "world"; //compare str1 and str2 ? ...
Here is my issue. I'm rendering axis alligned cubes that are all the same size. I created an algorithm that rendered around the player like this: ****** ****** ***p** ****** ****** While this does work, the player does not see this whole radius. I know the player's rotation angle on the Y, so I was hoping to modify my algorithm based ...