HI everyone, during the various stages of compilation in C or C++, i know that an object file gets generated. i.e., any_name.o file. what does thos .o file contain actually. i cant open it since its a binary file. Could anybody please help me? are the contents of the object file mainly Dependant on the compiler which we use on unix? ...
The following script will take a screenshot on a Gnome desktop. import gtk.gdk w = gtk.gdk.get_default_root_window() sz = w.get_size() pb = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB,False, 8, sz[0], sz[1]) pb = pb.get_from_drawable(w, w.get_colormap(), 0, 0, 0, 0, sz[0], sz[1]) if (pb != None): pb.save("screenshot.png", "png") prin...
HI, I am normally a C programmer. I do regularly debug C programs on unix environment using tools like gdb,dbx. i have never done debugging of big applications of C++. Is that much different from how we debug in C. theoretically i am quite good in C++ but have never got a chance to debug C++ programs. I am also not sure about what kind ...
Hi Please let me know how to decode infrared remote control code using c or c++. ...
I have a simple function Bar that uses a set of values from a data set that is passed in in the form of an Array of data structures. The data can come from two sources: a constant initialized array of default values, or a dynamically updated cache. The calling function determines which data is used and should be passed to Bar. Bar does...
What is the best way to detect if a graphics card and compiled openGL binary supports textures which are not a power of 2 at run time? ...
Do you know which of the GCC optimization flags are the most appropriate to build an application, which uses double floating point and calculates a lot in real-time and it uses -lm. A target hardware is two Dual-Xeons with Linux on-board. Thanks in advance! ...
If I run something like Sleep(10000), and the system clock changes during that, will the thread still sleep for 10 seconds of wall-clock time, or less or more? I.e. does the Sleep() function convert milliseconds into hardware ticks? ...
Hi guys I'm trying to transfer my files between 2 UNIX clusters, the data is pure numeric (vectors of double) in binary form. Unfortunately one of the systems is IBM ppc997 and the other is AMD Opteron, It seems the format of binary numbers in these systems are different. I have tried 3 ways till now: 1- Changed my files to ASCII for...
I print the value that I'm returning right before my return statement, and tell my code to print the value that was returned right after the function call. However, I get a segmentation fault after my first print statement and before my second (also interesting to note, this always happens on the third time the function is called; never ...
I have a profiling issue - imagine I have the following code... void main() { well_written_function(); badly_written_function(); } void well_written_function() { for (a small number) { highly_optimised_subroutine(); } } void badly_written_function() { for (a wastefully and unnecessarily large number) ...
Quoting from the C-std section 6.7.2.1, struct s { int n; double d[]; }; This is a valid structure declaration. I am looking for some practical use of this kind of syntax. To be precise, how is this construct any more or less powerful than keeping a double* as the 2nd element? Or is this another case of 'you-can-do-it-in-multiple-way...
Hi, I need to get the file descriptor to use in ioctl() calls for an ethernet port in Linux. Not sure how to do this. ...
I have a network server application written in C, the listener is bound using INADDR_ANY so it can accept connections via any of the IP addresses of the host on which it is installed. I need to determine which of the server's IP addresses the client used when establishing its connection - actually I just need to know whether they conne...
Is there any crossplatform small\portable C image editing library? ...
Is there any crossplatform C library for using Pixel Shading filters? to run pixel shader inside your programm, beter as native part of your programm (not like precompiled file), and better for using with abstract data - not only images ...
I found this code in NVIDIA's CUDA SDK samples. void computeGold( float* reference, float* idata, const unsigned int len) { reference[0] = 0; double total_sum = 0; unsigned int i; for( i = 1; i < len; ++i) { total_sum += idata[i-1]; reference[i] = idata[i-1] + reference[i-1]; } // Here it sho...
I'm writing some C code to parse IEEE 802.11 frames, but I'm stuck trying to create a new variable whose length depends on the size of the frame itself. Here's the code I currently have: int frame_body_len = pkt_hdr->len - radio_hdr->len - wifi_hdr_len - 4; u_char *frame_body = (u_char *) (packet + radio_hdr->len + wifi_hdr_len); Bas...
Is there any way to get a pointer to the current function, maybe through gcc extensions or some other trickery? Edit I'm curious whether it is possible to get the function pointer without ever explicitly using the function's name. I thought I had a good reason for wanting this, realized that I didn't really, but am still curious if it ...
What type T makes the following code compilable? T f(){ return &f; } I'd prefer a C answer, but I marked the question as C and C++ in case there is only an answer using templates. ...