C99 standard library provides intptr_t and uintptr_t typedefs, which are supposed to be used whenever the need to perform such a cast comes about. If you convert (void*) to (long) no precision is lost, then by assigning the (long) to an (int), it properly truncates the number to fit. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How do I check if a string represents a number (float or int)? However, you are also casting the result of this operation to (void*). I am compiling this program in linux gcc compiler.. long guarantees a pointer size on Linux on any machine. Bulk update symbol size units from mm to map units in rule-based symbology. What is the difference between const int*, const int * const, and int const *? You are right! Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? In both cases, converting the pointer to an integer type that's too small to represent all pointer values is a bug. ../lib/odp-util.c:5658:9: note: expanded from macro 'SCAN_END_SINGLE' Is it suspicious or odd to stand by the gate of a GA airport watching the planes? That's probably going to be true for most platforms you will ever encounter, but it's not a guarantee; it's implementation-dependent. You can fix this error by replacing this line of code. On a 64-bit Windows computer, 'long' is a 32-bit type, and all pointers are 64-bit types. SQL Server does not automatically promote . ../lib/odp-util.c:5665:7: note: expanded from macro 'SCAN_SINGLE' p-util.c.obj "-c" ../lib/odp-util.c tialized" "-Wno-format" "-Wno-incompatible-pointer-types" "-Werror" "-dM" "-U_MSC_VER" "-D_TIMESPEC_DEFINED" "-D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_SECURE_NO_WA Why do academics stay as adjuncts for years rather than move around? Why is this sentence from The Great Gatsby grammatical? Identify those arcade games from a 1983 Brazilian music video. There's no proper way to cast this to int in general case. I assumed that gcc makes a 65536 out of my define, but I was wrong. So the compiler is very picky here and the correct solution to make the code compile again and still let it show the exact same behavior like in Xcode 5.0 is to first cast to an integer type with a size that matches the one of a pointer and to then do a second cast to the int that we actually want: ids [i] = (int) (size_t)touch; SCAN_PUT(ATTR, NULL); Converts between types using a combination of implicit and user-defined conversions. Converting a pointer to an integer whose result cannot represented in the integer type is undefined behavior is C and prohibited in C++. Can Martian regolith be easily melted with microwaves? To learn more, see our tips on writing great answers. This is an old C callback mechanism so you can't change that. How to tell which packages are held back due to phased updates, Identify those arcade games from a 1983 Brazilian music video. Taking the above declarations of A, D, ch of the . If you preorder a special airline meal (e.g. Bulk update symbol size units from mm to map units in rule-based symbology. Narrowing Casting (manually) - converting a larger type to a . Can anybody explain how to pass an integer to a function which receives (void * ) as a parameter? The cast back to int * is not, though. (int) pthread_self() 64int48intuintptr_t (unsigned int) should we also have a diagnostic for the (presumed) user error? 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. You may declare a const int variable and cast its reference to the void*. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. No idea how it amassed 27 upvotes?! Is a PhD visitor considered as a visiting scholar. The problem just occur with Xcode 5.1. The preprocessor will replace your code by this: This is unlikely what you are trying to do. Since all pointers on 64-bit Windows are 64 bits, you are growing the data size from 32 bits backto 64 bits. actually no, as int my be a smaller type than a pointer ;-) But, of course with int64_t it works fine. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? You can use any other pointer, or you can use (size_t), which is 64 bits. for (i=0, j=0; j Is Robbie Moore Mp Married, Ben Kallo Education, Articles C