p-util.c.obj "-c" ../lib/odp-util.c SCAN_PUT_ATTR(key, ATTR, skey, FUNC); No idea how it amassed 27 upvotes?! How to use Slater Type Orbitals as a basis functions in matrix method correctly? It's always a good practice to put your #define's in brackets to avoid such surprise. Not the answer you're looking for? ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Put your define inside a bracket: #define M_TABLE_SIZE (64*1024) Now, you can do: static const void* M_OFFSET = (void*) M_TABLE_SIZE; without a problem. The high-order 9 bits of the number are used to hold a flag value, and the result is converted back into a pointer. what does it mean to convert int to void* or vice versa? I'm trying to create a void* from an int. Making statements based on opinion; back them up with references or personal experience. AC Op-amp integrator with DC Gain Control in LTspice. /** Dynamically allocate a 2d (x*y) array of elements of size _size_ bytes. The reinterpret_cast makes the int the size of a pointer and the warning will stop. Share Improve this answer Follow answered May 6, 2018 at 7:24 Rahul There exist two main syntaxes for generic type-casting: functional and c-like: 1 2 3 4 double x = 10.3; int y; y = int (x); // functional notation y = (int) x; // c-like cast notation The functionality of these generic forms of type-casting is enough for most needs with fundamental data types. Yesterday, I updated Xcode to the newest version (5.1 (5B130a)) to compatible with iOS 7.1. But I'm nitpicking .. It is done by the compiler on its own, without any external trigger from the user. I'm new to coding and am trying to implement a simple program on my own, that prompts the user the number of residents in an apt complex, the prompts the user to enter the names and apt numbers of each resident. Why is this sentence from The Great Gatsby grammatical? ../lib/odp-util.c:5658:9: note: expanded from macro 'SCAN_END_SINGLE' Typically, long or unsigned long is . How to notate a grace note at the start of a bar with lilypond? The problem is not with casting, but with the target type loosing half of the pointer. lexborisov Modest Public. Find centralized, trusted content and collaborate around the technologies you use most. You think by casting it here that you are avoiding the problem! This allows you to reinterpret the void * as an int. This is an old C callback mechanism so you can't change that. Fork 63. What I am saying is that it would be safer to use new(5) rather than 5 and deal with it appropriately at the other end. This method will not work on 64 bit Big Endian platform, so it unnecessarily breaks portability. this way you won't get any warning. cast to 'double *' from smaller integer type 'unsigned int' The C compiler is gcc, clang version 3.9.1, target aarch64--linux-android, thread model posix.
Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Did i have to face to unexpected runtime issues, i guess not, i've found another discussion on this -. Does Counterspell prevent from any further spells being cast on a given turn? No sense in writing a few dozen lines of extra code just to get a bunch of numbered threads. Since gcc compiles that you are performing arithmetic between void* and an int (1024). how to cascade 2d int array to 2d void pointer array? The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Unless you have a valid address at that value, you are going to invoke undefined behaviour when try to use that pointer. But gcc always give me a warning, that i cannot cast an int to a void*. The result is implementation-defined and typically yields the numeric address of the byte in memory that the pointer pointers to. . I understood, but that would introduce dynamic memory and ugly lifetime issues (an object allocated by one thread must be freed by some other) - all just to pass an. this way you won't get any warning. for (i=0, j=0; j