I have tried clock_gettime(CLOCK_REALTIME) and gettimeofday() without luck - And the most basic like clock(), what return 0 to me (?). But none of they count the time under sleep. I don't need a high resolution timer, but I need something for getting the elapsed time in ms. Thanks. EDIT: Final program: #include <iostream> #include <...
Is there a way, just using the win32 API, to find out what version of USB is available? The XPe build is pretty barebones and doesn't doesn't have WMI. I considered the USBview technique: enumerate the USB hubs by opening \.\HCD0 through say \.\HCD9, use DeviceIoControl to get the hub name, and looking for an enhanced host controller. ...
Hi, I am new to embedded systems programming, although I have done courses during studies, practical programming is still a bit further away. Here is the problem: I have to program a small system on NXP LPC2103 microcontroller (ARM 7 based), without an operating system. It has a watchdog timer which needs to be regularly updated. The s...
Using inline assembler [gcc, intel, c], how to check if the carry flag is set after an operation? ...
I need help with gcc warning,looks like im doing something wrong here unsigned long convert_syslog(char *date,int year) { char withyear[1024]; struct tm tm; time_t epoch = (time_t) NULL; snprintf(withyear,sizeof(withyear),"%s %i",date,year); if(strptime(withyear,"%b %d %H:%M:%S %Y",&tm)) { epoch = mktime...
Hi All, I'm having a hard time writing makefiles. I have experience in using the extern variables, when I build the project without using makefiles I get absolutely no errors and I can run the program. But from the time I wrote the makefile to build the project, I'm getting undefined reference to errors. I have more than 3 files with ...
For purposes of type checking I would like to define a function on the lines of void myfunc(type1 a, type2 b) { ... } where type1 and type2 are both typedefed to uint8_t. So far so good, but for sanity and checking purposes (think DbC) I would like to prevent the function being called with a type2 value for the first parameter or a t...
I found the following problem on the internet, and would like to know how I would go about solving it: You are given an array ' containing 0s and 1s. Find O(n) time and O(1) space algorithm to find the maximum sub sequence which has equal number of 1s and 0s. Examples: 10101010 - The longest sub sequence that satisfies...
Hey all, I'm a bit confused now. I thought that when you used extern on a function, it would become global to everything, but it doesn't seem so... What I want right now, is to have some set of functions that I can use in my static library and in the program that links it. How do I that? I'm using Objective-C ...
How do I return an array of strings from a recursive function? For example:: char ** jumble( char *jumbStr)//reccurring function { char *finalJumble[100]; ...code goes here...call jumble again..code goes here return finalJumble; } Thanks in advance. ...
I'm having troubles when calling a function taking a pointer to a string as a parameter. I need to get an Element's name. // method void getStringFromCsv( char ** str ); Let me introduce the structures I'm working with (not written by me and part of a much bigger project, I can't modify them). // typedefs typedef char T_CHAR64[...
Let's say I have a program(C++, for example) that allocates multiple objects, never bigger than a given size(let's call it MAX_OBJECT_SIZE). I also have a region(I'll call it a "page") on the heap(allocated with, say, malloc(REGION_SIZE), where REGION_SIZE >= MAX_OBJECT_SIZE). I keep reserving space in that page until the filled space e...
In the following code segment what will be: the result of function value of x value of y { unsigned int x=-1; int y; y = ~0; if(x == y) printf("same"); else printf("not same"); } a. same, MAXINT, -1 b. not same, MAXINT, -MAXINT c. same , MAXUINT, -1 ...
Hi, I am porting some code from C to C++ and I found this code: if(ErrorCode >= SOME_CONSTANT) { Status = RETVAL_OK; switch ( ErrorCode ) { default: Status = RETVAL_FAILED; break; } } This code generates a compilation warning: warning C4065: switch statement contains 'default' but no ...
Possible Duplicate: Garbage Collection in C++ why? Hi, I read few articles about Garbage Collectors, and still there is one thing I just don´t understand - why use garbage collection? I will try to explain my thoughts: Garbage Collector should release dynamically allocated memory back to system in case there is no need for ...
Im new to OpenSSL, Can anybody give me a hint in how to initialize AES CTR mode from a C file. I know this is the method´s signature but I am having problems with the parameters, there´s not many documentation neither a clear example how to make a simple encryption. I would appreciate if somebody could exemplify a call to this method. Th...
I need to sort some arrays of floats, modify the values, and then construct an array with the original ordering, but the modified values. In R, I could use the rank() and order() functions to achieve this: v a vector v[order(v)] is sorted v[i] goes in the rank(v)th spot in the sorted vector Is there some equivalent of these functions...
As part of learning C, I wrote the following code to combine directory name with file name. Eg: combine("/home/user", "filename") will result in /home/user/filename. This function is expected work across platforms (atleast on all popular linux distributions and windows 32 and 64bit). Here is the code. const char* combine(const char* p...
Possible Duplicate: C code compiles as C++, but not as C Edit: I recompiled the source for the library as C, and that fixed it. I've got this code I need to use in my application. It's for writing to the serial port, and I can't figure out how to get it to run in C. I've got a version in C++, as well as a version that looks ...
Hello, gcc 4.4.4 c89 I have seen this in some code I am maintaining. #define FALSE 0 #define TRUE (!FALSE) is there any difference in writing the following: #define FALSE 0 #define TRUE 1 Its been used in some functions like this: if(condition failed) { return FALSE; } else { return TRUE; } Many thanks for any suggesti...