First and foremost, apologies for any cross-posting. Hope I'm not repeating an issue here, but I was unable to find this elsewhere (via Google and Stack Overflow). Here's the gist of the error. If I call printf, sprintf or fprintf anywhere within my code, to display a float, I get a SIGSEGV (EXC_BAD_ACCESS) error. Let me give an example...
Using the frameworks on OS X, I can use the following to copy a PNG to the pasteboard (in C — obviously I could use NSPasteboard with Cocoa): #include <ApplicationServices/ApplicationServices.h> int copyThatThing(void) { PasteboardRef clipboard; if (PasteboardCreate(kPasteboardClipboard, &clipboard) != noErr) { return -1; ...
pcap_compile() compiles a string into a filter program in the form of a bpf_program struct. In theory I could save the compiled form of the program and supply it to pcap_setfilter() on a different network interface or even on a different machine. Will that work? Is the bpf_program form portable across different interfaces? Different pro...
i was assigned to make some changes to a C program written by someone else...i want to understand it first to work on it properly...i came upon a function that generates the histogram of ASCII values from a given long string of data. it is something like this. //load the symbols the old data for(int k = 0;k < 256;++k) { sym[k].S...
Can anyone please tell me how to multiply two number arrays in C? The number arrays are basically derived from two strings containing digits. eg: 123456 and 132465. Edit: I had two string as S1 = "123456" and S2="132546". I then converted these two strings into array of ints i.e. int IS1[6] and IS2[6] so that IS1[1] = 1, IS1[2] = 2......
I do not want to learn an IDE or similar software which is only made for one platform only. I want to spend my time+energy in learning something which is a timeless-truth. I want to switch to an editor-religion, which has no religion but of development and progress, it sees & treats all with equality. Yes, please provide me some guide...
How can a program draw text on a frame buffer mapped in as an array? What is needed is both a means of representing the individual characters, and of drawing the characters pixel by pixel in a manner that is not too inefficient. The representation of the characters should ideally be defined solely in code, and no third party libraries wo...
Is it possible to iterate of a C struct, where all members are of same type, using a pointer. Here's some sample code that does not compile: #include <stdio.h> #include <stdlib.h> typedef struct { int mem1 ; int mem2 ; int mem3 ; int mem4 ; } foo ; void my_func( foo* data ) { int i ; int* tmp = data ; // This ...
I have a plist that is processed with a precompiled header file and in it there is the "variable" VERSION_STRING used a few times in such fields as CFBundleGetInfoString, ie the value for the key CFBundleGetInfoString is: MyProduct VERSION_STRING Copyright © 2009 MyCorp In MyHeader.h (which is the set as the Info.plist prefix header I w...
I have a data stream that is addressable only in 8-bit bytes, I want to parse it out into 6-bit elements and store that into an array. Is there any best known methods to do this? 11110000 10101010 11001100 into an array like 111100|001010|101011|001100 (can have zero padding, just needs to be addressable this way) and the dat...
I'm trying to compile a C file that contains jni.h. The C code is a wrapper for my Java call to a C method. The code example that I'm trying to compile on my machine received compile errors for jstring and jclass. I believe it is due to Visual Studio cl command compile using the cplusplus option and I cannot get it to reference the co...
If I call a function like myObj.setType("fluid"); many times in a program, how many copies of the literal "fluid" are saved in memory? Can the compiler recognize that this literal is already defined and just reference it again? ...
Suppose I have a structure, and a pointer to a memory location p, how do I make sure that while creating an instance 'a' of the structure, it is placed into a memory chunk starting at p? So I am passed a chunk of memory and I want to create a node at the beginning of it, so I need to make sure that the node is created at the beginning o...
I'm trying to re-enter the job market after a loong break - 15 years. My last full time job was programming in C with Sybase SQL backend for a corporation. Recently, I did a few websites. You know, HTML, CSS, PHP, etc. But I feel JAVA is more closely related to what I did, plus I don't really like web development - web technologies chang...
Are the runtime interfaces(such as __objc_exec_class()) for Objective-C programs specified/documented anywhere, or they are (compiler-)implementation defined? The closest thing to a reference I have found are the GCC headers, but I'd like to know if there is some sort of reference document. ...
// strings is a 2D array (each string is 11 bytes long) char strings[][11] = {"0123456789", "2222244444", "3333366666"}; printf("String 3 Character 2 is %c\n", strings[2][1]); How can I code this print statement using pointer arithmetic instead of the strings[2][1] ? ...
I'm looking for a while the source code for xclock in c but seems not successful to find it. Does any one know where to find it? I tried on google but no success. ...
Considering the basic data types like char, int, float, double etc..in any standard language C/C++, Java etc Is there anything like.."operating on integers are faster than operating on characters".. by operating I mean assignment, arithmetic op/ comparison etc. Are data types slower than one another? ...
I am very disappointed with my school linux server when doing the homework on it. The reason is: my homework requires to make GUI application. All the tool that I have is: - ssh from my local machine to school machine - gcc/g++ in my school machine I have been thinking and tried out different solutions for a week. I still can't be ...
Currently I am developing an application using FUSE filesystem module in Linux (2.6 Kernel) in C language. Due to some programming error, the application crashes after mounting the filesystem. Since I am a novice developer in Linux/C environment. Could you please let me tell me possible options to debug such programs? ...