what I'd like to do (for logging purposes) is something like this: this code has been written to show my problem, actual code is complex and yes, I have good reasons to use macros even on C++ =) # define LIB_SOME 1 # define LIB_OTHER 2 # define WHERE "at file #a, line #l, function #f: " // (look for syntax hightlighting error at SO x...
I was unable to find a clear answer to this although that might be because I was not using the proper search terms so please redirect me if that is the case. Is it possible to use previous arguments in a functions parameter list as the default value for later arguments in the parameter list? For instance, void f( int a, int b = a, int...
I've been using C++ for a bit now. I'm just never sure how the memory management works, so here it goes: I'm first of all unsure how memory is unallocated in a function, ex: int addTwo(int num) { int temp = 2; num += temp; return num; } So in this example, would temp be removed from memory after the function ends? If not,...
I have a python code computing a matrix, and I would like to use this matrix (or array, or list) from C code. I wanted to pickle the matrix from the python code, and unpickle it from c code, but I could not find documentation or example on how to do this. I found something about marshalling data, but nothing about unpickling from C. Edi...
Let's say that I want to get the size in bytes or in chars for the name field from: struct record { int id; TCHAR name [50]; }; sizeof(record.name) does not work. ...
I'm attempting to use the following to get the height & width of the main display: #include <winuser.h> size_t width = (size_t)GetSystemMetrics(SM_CXBORDER); size_t height = (size_t)GetSystemMetrics(SM_CYBORDER); However, it's failing on an unresolved externals link error (LNK1120). I've tried linking to user32.lib (as documented here...
I've got a 3rd party C application that's compiled to a non-.NET non-COM DLL. It has one simple function declared like so: Declare Function CapiTaxRoutine Lib "taxcommono.dll" (ByVal sInData As String, ByVal OutputData As String, ByVal intINPutLength As Long) As Integer If I place the taxcommono.dll in my path (C:\Windows\System32 is...
Even though I am a long time C programmer, I only recently learned that one can directly assign structure variables to one another instead of using memcpy: struct MyStruct a,b; ... a = b; /* implicit memcpy */ Though this feels a bit "high-level" for C, it is definitely useful. But why can't I do equality and inequality comparison: i...
What are some of the best ways to manage redundant typedefs used for platform independence from multiple middleware (operating systems, protocol stacks) vendors in the C programming language. e.g.: target.h /* inclusion lock etc */ typedef char CHAR; typedef unsigned char BYTE; typedef unsigned short int WORD; /* ... more of the same ....
I'm writing a set of numeric type conversion functions for a database engine, and I'm concerned about the behavior of converting large integral floating-point values to integer types with greater precision. Take for example converting a 32-bit int to a 32-bit single-precision float. The 23-bit significand of the float yields about 7 dec...
See question. Also any links to example code or example code on how to validate an xml file against multiple schemas would be helpful. EDT: Sorry forgot to mention that this is for LINUX ...
On a project I'm working on, I'm trying to make it accept user commands and provide history with the up arrow. I'm aiming to keep this project free of dependencies, and I don't want to have to require people to also install the readline development files just to compile my project. Does anyone know of a simple drop-in replacement for GNU...
I am dynamically loading several registry API's from the library Advapi32.dll. Under Windows XP and Vista everything is OK. Under Windows 7 I keep getting the error The parameter is incorrect and in some cases (like RegCloseKey) my application crashes. The code I am using is the usual: // RegCreateKeyEx typedef LONG (WINAPI *MyRegCreat...
How can I simulate the following Python function using the Python C API? def foo(bar, baz="something or other"): print bar, baz (i.e., so that it is possible to call it via: >>> foo("hello") hello something or other >>> foo("hello", baz="world!") hello world! >>> foo("hello", "world!") hello, world! ) ...
It seems that everytime I call a function that returns a PyObject*, I have to add four lines of error checking. Example: py_fullname = PyObject_CallMethod(os, "path.join", "ss", folder, filename); if (!py_fullname) { Py_DECREF(pygame); Py_DECREF(os); return NULL; } image = PyObject_CallMethodObjArgs(pygame, "image.load", py_...
Using CoreFoundation, I can display an alert dialog with the following: CFUserNotificationDisplayAlert(0.0, kCFUserNotificationPlainAlertLevel, NULL, NULL, NULL, CFSTR("Alert title"), CFSTR("Yes?), ...
Trying to find a way to limit the framerate of programs/games externally in a similar fashion to VSync, but to a specified number (instead of screen refresh rate). A perfect example of what I am aiming for can be seen in FRAPS, when recording a video the framerate is limited to the recording rate. The reason is for fast pace games which ...
I am tryint to integrate CUDA in an existing project, in which several libs (DLLs) are created. I started with a very simple kernel that computes a dot product : // dotProd_kernel.cu __global__ void dotProd( double* result, double* vec1, double* vec2) { int i = threadIdx.x; result[i] = vec1[i] * vec2[i]; } This kernel is called ...
I thought I wanted to use GSS-API, but now am not so sure, since I'm having a hard time finding good sample code for a trivial client/server pair. Sun has documentation including sample code, but it's written specifically for their GSS API implementation, using a few proprietary functions not in e.g. the GNU GSS-API (and for which it's ...
Where can I find the infamous list.h from the linux kernel? I remember seeing it at once point and I can't for the life of me find it again. I'm running a Windows box so it would be great if you can point me out to a nice HTTP site where it's hosted :) Thanks. ...