The compiler issues the "cast from integer to pointer of different size" warning whenever the value of an integer is converted to a pointer, especially when the memory allocated to a pointer is smaller than the memory allocated to an integer data type. Making statements based on opinion; back them up with references or personal experience. The content you requested has been removed. #5779 (cast to 'void *' from smaller integer type 'int') - GDAL Episode about a group who book passage on a space ship controlled by an AI, who turns out to be a human who can't leave his ship? cast to void *' from smaller integer type 'int Can my creature spell be countered if I cast a split second spell after it? and how to print the thread id of 2d array argument? # * # (intptr_t) # # warning: cast to pointer from integer of different size # (intptr_t)IDE # (void*) . Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? For more information, see User-defined conversion operators. Were sorry. Why did US v. Assange skip the court of appeal? If you are going to pass the address you typically need to exert some more control over the lifetime of the object. I am using the UDF of the Ansys Manual Book as a base for what I intended, but I am trying to incorporate a second component to my condensable mixture, being methanol . I am compiling this program in linux gcc compiler.. Surely the solution is to change the type of ids from int to type that is sufficiently large to hold a pointer. Thanks Jonathan, I was thinking about my answer in another thread: AraK is correct, passing integers a pointers are not necessarily interchangeable. How to make compiler not show int to void pointer cast warnings, incompatible pointer types assigning to 'void (*)(void *)' from 'int (int *)'. What you do here is undefined behavior, and undefined behavior of very practical sort. Types - D Programming Language Thanks for contributing an answer to Stack Overflow! You can use any other pointer, or you can use (size_t), which is 64 bits. It seems both static_cast and dynamic_cast can cast a base class a cast of which the programmer should be aware of what (s)he is doing. Use #include to define it. What is this brick with a round back and a stud on the side used for? Thanks for pointing that out. this question. arduino ide - Incompatible types in assignment of 'uint8_t {aka UDF for multiples heterogenous reactions - CFD Online I'll edit accordingly. Please help me with the right way to convert void* to int in c++ Mar 30, 2020 at 10:44am George P (5286) Maybe try reinterpret_cast? How can I control PNP and NPN transistors together from one pin? 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. If we had a video livestream of a clock being sent to Mars, what would we see? I agree that you should bite the bullet and fix the code to use the correct integer type. u8 -> u32) will zero-extend if the source is unsigned sign-extend if the source is signed Is it safe to publish research papers in cooperation with Russian academics? Needless to say, this will still be wrong. How to correctly type cast (void*)? - social.msdn.microsoft.com I have a question about casting a function pointer. Integer conversions, both implicit and explicit (using a cast), must be guaranteed not to result in lost or misinterpreted data. I'm not sure how to tell Clang (it's tools, really) that the platform is a 32-bit platform and to stop complaining. For example, if the pointers in a system are stored in 16 bits, but integers are stored in 8 bits, a total of 8 bits would be lost in the . While working with Threads in C, I'm facing the warning, "warning: cast to pointer from integer of different size". In 64-bit programs, the size of the pointer is 64 bits and it cannot be put into the int type that remains 32-bit almost in all the systems. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. For built-in numeric types, an implicit conversion can be made when the value to be stored can fit into the variable without being truncated or rounded off. @jackdoe: It's a waste of human life to write code that "you may need in the future". As Ferruccio said, int must be replaced with intptr_t to make the program meaningful. I'm having a little bit of trouble regarding pointer casting in my program. this way you won't get any warning. Losing bytes like thisis called 'truncation', and that's what the first warning is telling you. Unfortunately, that hardware is 64-bit and the code contains many instances of pointer arithmetic that expects pointers to be 32-bit, i.e. How to correctly cast a pointer to int in a 64-bit application? You are getting warnings due to casting a void* to a type of a different size. (void *)(long)i, Copyright 2011-2023 SegmentFault. Does it effect my blogs SEO rankings? Extracting arguments from a list of function calls.
