By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. whenComplete() method not working as expected - Flutter Async, iOS app crashes when opening image gallery using image_picker. . How to find the size of an array (from a pointer pointing to the first element array)? Tabularray table when is wraped by a tcolorbox spreads inside right margin overrides page borders. Why doesn't Stockfish announce when it solved a position as a book draw similar to how it announces a forced mate? I'm not sure what you expected to happen, but you are storing the ADDRESS not the VALUE. See here: http://www.cplusplus.com/reference/cstdio/printf/. We and our partners share information on your use of this website to help improve your experience. Not the answer you're looking for? Here you have allocated the node, but you have not allocated anything to hold the contents. Is the EU Border Guard Agency able to tell Russian passports issued in Ukraine or Georgia from the legitimate ones? as 4-byte pointers using the PTR32ATT attribute or one of the predefined 4-byte pointer types. Probably, reworking the code is a better idea. What you want is probably the address of that character, which you can get by using the "address of" operator, &: which can also be written using pointer arithmetic as: Note, however, that C indexes from zero, so the first character is really at lines[0]: First, I'm sure it's just a typo, but you declared char lines[] instead of char line[]. while loop keep printing and repeating, what is wrong with my getch? Why is there an extra peak in the Lomb-Scargle periodogram? https://www.tutorialspoint.com/cprogramming/c_pointers.htm. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. intptr_t: All this under the assumption you really want to convert the wrong-sized integer to a pointer. It is defined as follows : Integer type capable of holding a value converted from a void pointer and then be converted back to that type with a value that compares equal to the original pointer. What it sounds like: something is wrong in your pointers. The second one isn't going to be any better. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. This is on a 64-bit system. warning: cast from pointer to integer of different size MacOS X 64 int Anytime you try to assign a 64-bit value in to a 32-bit value without explicitly casting it the compiler will throw a warning [granted, it could still work but in general is not good practice. How do I put three reasons together in a sentence? How can I use a VPN to access a Russian website that is banned in the EU? It is defined as follows : Integer type capable of holding a value I've looked at some of the previous posts on these but still cant understand why this is going on. Tabularray table when is wraped by a tcolorbox spreads inside right margin overrides page borders. In the older compilers just doing the char *ptr = (char *)23 was good enough but the new compilers know a int (23 would be stored in a int) is not the size of a pointer (normally 64 bits) and it generates the warning message. Do non-Segwit nodes reject Segwit transactions with invalid signature? Copyright 2022 Educative, Inc. All rights reserved. It is designed for treating pointers as integers when necessary. Why do quantum objects slow down when volume increases? Your node just holds some pointers (ADDRESSES), it doesn't hold any VALUES. Cast from a pointer to an integer of a different size Problem: I received the following warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] Solution: The GNU Compiler Collection (GCC) 4.6.3 issues a warning when you cast a Use %p. In the thread function you do the opposite, first cast to intptr_t and then to int. @ugoren, I would choose the alternative :-) Casting is often used to "hush that pesky compiler! reinterpret_cast fixes that. Find centralized, trusted content and collaborate around the technologies you use most. How to check if widget is visible using FlutterDriver. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You need to include to have the uintptr_ttype (an integral type What is a smart pointer and when should I use one? These errors occur because the casts are not correct. The warning of cast from pointer to integer of different size occurs when you try to save the value of an integer to a pointer variable, as demonstrated in the code below. I did this for you and get: seems like you wrote an asterisk too much. This is wrong, since characters are not addresses this assignment makes no sense. However, be very very careful when doing things like this. Fixed by #9125 Contributor mbiebl commented on Jan 2, 2018 Submission type Bug report systemd version the issue has been seen with v236 Used distribution When compiling systemd on i386 I get the following warnings @JoshPetitt, For overcoming strict compiler warnings, the double cast may be necessary. C unix program, Different executables from different cds run always the same code, what is the time and space complexity of this function. If you are casting, you are probably doing it wrong. You need to include to have the uintptr_t type (an integral type with the same size as a pointer). For a new C user, I would tell them to never cast. What does "dereferencing" a pointer mean? 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 given conversion. this fixed-width integer reference. And in serverThread, the received void*is cast to int, resulting in the warning about the cast from pointer to The only alternative is to design the data structures differently, which is better, but not always applicable. But using, TabBar and TabView without Scaffold and with fixed Widget. cast from pointer to integer of different size: what is the problem??? thank you, i know that line[0] is the first. The compiler tries to warn you that you lose bits when casting from void * to int . It doesn't know that the void * is actually an int cast, uboot warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] Writel(val, reg) reg = val regint rawsocket.c:90: warning: cast to pointer from integer of different size rawsocket.c:91: warning: cast to pointer from integer of different size In my program, I know that the value stored at ((char *)b + 4) is itself another pointer, and I want to store this pointer in 'a'. That part of the problem can be solved by using uintptr_t, a type defined in and . I want to calculate the image size in colors in (Mo) and in black and white in (Ko) so for this I'm using a parameters that are past in a terminal command which are (image length and width). uboot warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] Writel(val, reg) reg = val regint * egint reg=0xFF00FF00 CGAC2022 Day 10: Help Santa sort presents! i actually name variables zero, first, and so on. Making statements based on opinion; back them up with references or personal experience. takes the second character (line[1]) and casts it to the pointer to char, which is incorrect. Cast to pointer from integer of different size, Cast to pointer from integer of different size (passing int as a const void * parameter), Avoid "warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] " in a _generic macro. Thanks for contributing an answer to Stack Overflow! Pointers have varying sizes, on 64 bit systems for example they can be expected to be 64bit. Does a 120cc engine burn 120cc of fuel a minute? Please let me know if there is a proper way to do this. How to suppress warning: cast to pointer from integer of different size? How can I fix it? @David: See my update please, I think that's what you're after if I'm understanding you. You're converting i to a void pointer without creating a reference to it. EDIT: To clarify, I don't want 'a' to point to an address that is 4 bytes greater than 'b'. but then *((char *)b+4) is dereferencing (char *)b+4, so that's type char -- and you're then trying to cast that thing, which is probably 1 byte, into a 4 or 8 byte address. Dual EU/US Citizen entered EU on US Passport. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. Why is the federal judiciary of the United States divided into circuits? Does illicit payments qualify as transaction costs? Compile Error in C: error: expected expression before . token. On a lot of systems, sizeof (long) == sizeof (void *). By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 1 - warning: cast from pointer to integer of different size . Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. What are the Kalman filter capabilities for the state estimation in presence of the uncertainties in the system input? func is returning an integer that is being stored in a pointer; ptr is later cast to an integer and used as an integer. Irreducible representations of a product of two groups. int threadnumber Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. How do I arrange multiple quotations (each with multiple lines) vertically (with a line through the center) so that they're side-by-side? To learn more, see our tips on writing great answers. [3/8] exynos_fimg2d: fix cast from pointer to integer of different size Message ID 1393995704-29184-4-git-send-email-djkurtz@chromium.org ( mailing list archive ) The good way would be to send a true pointer. How do I put three reasons together in a sentence? The mapping functions for converting a pointer to an integer or an integer to a pointer are intended to be consistent with the addressing structure of the execution environment. Second, did you want to put the address of line[0] into first? the OP will also have to be careful not to do something like this in a function. Counterexamples to differentiation under integral sign, revisited, Why do some airports shuffle connecting passengers through security again. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. is a pointer to char, as is (char *)b+4 but then * ( (char *)b+4) is dereferencing (char *)b+4, so that's type char -- and you're then trying to cast that thing, which is probably 1 byte, Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Thanks for contributing an answer to Stack Overflow! i know it's weird, but it helped me remember the positions. Warning: cast to pointer from integer of different size. Relative addressing in x86 assembly (intel flavor), are offsets given relative to the top or bottom of the "slot"? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Do bracers of armor stack with magic armor enhancements and special abilities? How do I arrange multiple quotations (each with multiple lines) vertically (with a line through the center) so that they're side-by-side? In the second case, it's less of an issue but to deal with endianness issues you should cast through intptr_t: some_struct *ptr = (some_struct *)(intptr_t)func(); and later int value = (int)(intptr_t)ptr;. Because at -m32, you have ILP32, and at -m64, you get LP64, and it's only when pointers are bigger than ints that you'll get the warning, and longs are the same size as pointers in both cases. i actually name variables zero, first, and second. it helps me remember. How could my characters be tricked into thinking they are on Mars? A better idea might be to use intptr_t. Data is lost upon conversion from a larger number (int) to a smaller number (pointer). error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] 1 answer 10 views. Asking for help, clarification, or responding to other answers. How can you know the sky Rose saw when the Titanic sunk? I'm assuming (char **) means it's a pointer to a pointer? hans April 23, 2021, 7:33pm #1. How could my characters be tricked into thinking they are on Mars? Finally, your compiler is right in warning you. cast from pointer to integer of different size when compiling on x86_64-apple-darwn9/10. A solution using dynamic allocated memory for the value would look something like this: While this solution is more "correct", it is less readable which means it's less maintainable; It has more code which means more chances of errors; And it has the possibility of a memory leak if the free call is forgotten (which sooner or later will happen). Connect and share knowledge within a single location that is structured and easy to search. rev2022.12.11.43106. If you were to use such an implementation, the program wouldn't work. Bug#622206: libomxvorbis: FTBFS on *64: cast from pointer to integer of different size. Not returning a value from a function declared to do so leads to undefined behavior. Using flutter mobile packages in flutter web. ], If you're not averse to using unsigned integers, it might be easier to use uint_64t or something like that, which will avoid the 64-bit to 32-bit assignment (uint_64t is an unsigned 64-bit int). make: No targets provided near line 28 (CMake), gcc.exe warning cast from pointer to integer of different size [-Wpointer-to-int-cast]. Connect and share knowledge within a single location that is structured and easy to search. The second will be pointing to 0x234234. i will edit it. Not the answer you're looking for? First, if you can fix func (are allowed to modify its source), then fix it. How can I fix it? Having a problem installing a new program? warning: cast from pointer to integer of different size Solution:Ensure that all pointers are defined correctly. espressif32. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. How do I create a static implicit rule in a Makefile? Not the answer you're looking for? I've patched off of the warnings on x86_64 darwin with the changes below --- openmotif-2.3.2/lib/Xm/DragBS.c.org 2009-08-29 10:27:40.000000000 -0400 You need to It is likely this code was originally written for a system where the integer type returned by func had the same size as the pointer type, but you are now compiling on a system where the pointer type is larger or less than that integer size. Does aliquot matter for final concentration? Type-safe generic data structures in plain-old C? How to fix: passing argument 1 of 'sutuntopla' makes pointer from integer without a cast warning? Not the answer you're looking for? Making statements based on opinion; back them up with references or personal experience. When printing pointers, print pointers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Warning in C: assignment makes integer from pointer without a cast, "assignment makes integer from pointer without a cast " warning in c, Assignment makes integer from pointer without a cast warning, I'm getting warning "cast to pointer from integer of different size", How to fix " assignment makes pointer from integer without a cast [-Wint-conversion]"? Note that I changed the signature of the thread function to be correct, it takes a void * argument, and this makes a whole lot difference on systems where sizeof(int) != sizeof(void *), which seems to be true in your case. What does "assignment makes pointer from integer without a cast" mean? Post by Jack Howarth and why it is different at -m64. In my program, I know that the value stored at ((char *)b +4) is itself another pointer, and I want to store this pointer in 'a'. Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? In that case you should change the return type of func to intptr_t; see Using intptr_t instead of void*? Originally, that cast was direct, but the intermediate cast to intptr_twas inserted to remove the warning about the cast to pointer from integer of different size. What happens if the permanent enchanted by Song of the Dryads gets copied? That's because the thread function is declared (and specified) to return a pointer. Reassigning const char array with unknown size, Modular programming in C (nested headers), While loop runs automatically after calling a method with a switch statement in C, Want to notedown CPU usage and Memory Usage of my C program, why does this error occur: 'conio.h' file not found. Ergo, mismatched sizes. Connect and share knowledge within a single location that is structured and easy to search. This type has the same size of a pointer (not int) in every architecture. (i.e. I wouldn't suggest a double cast. i actually name variables zero, first. How many transistors at minimum do you need to build a general-purpose computer? To convert a char* to an int in C, you don't cast the pointer. It doesn't know that the void * is actually an int cast, so the lost bits are meaningless. @JoshPetitt, you're right that I offered the easy solution, not to fundamental one. What is a smart pointer and when should I use one? We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. To learn more, see our tips on writing great answers. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. For those curious, while I would normally not recommend casting an integer to a pointer like this, there are exceptions to everything and this is one of the few cases (if not the only one) where such a cast is acceptable. Why is the federal judiciary of the United States divided into circuits? Many still look down on such a solution, but still use it since it's easier than the whole malloc-copy-free circus that's otherwise needed. Making statements based on opinion; back them up with references or personal experience. Ready to optimize your JavaScript with Rust? I personally prefer to make the conversion explicit and easy to verify by using macros (in the hopes that learners notice the issue); in this case, perhaps. just a typo. Like @JonathanLeffler said, use uintptr_t. Would like to stay longer than 90 days. Why / when to use `intptr_t` for type-casting in C? Now I understand what I did, but my goal is not for 'a' to point to an address 4 bytes greater than 'b'. Ready to optimize your JavaScript with Rust? I'm not sure if this is what you want. Notices Welcome to LinuxQuestions.org, a friendly and active Linux Community. Why does the USA not have a constitutional court? Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, cast to pointer from integer of different size [-Wint-to-pointer-cast], warning: cast to pointer from integer of different size [-Wint-to-pointer-cast], assignment makes integer from pointer without a cast [-Wint-conversion], warning: assignment from incompatible pointer type [enabled by default] and cast to pointer from integer of different size [-Wint-to-pointer-cast], Avoid "warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] " in a _generic macro, pthread_exit() throws warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] warning. The reinterpret_cast take the value and casts it to the type and size of pointer given. -1, the first and second characters really aren't at those indices. Ready to optimize your JavaScript with Rust? We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. cast to pointer from integer of different size [-Wint-to-pointer-cast] Submitted: 2018-02-27 18:22 UTC: Modified: 2018-02-27 18:45 UTC: Votes: 4: Avg. In the first case, the return value from func will lose information, and potentially crash or worse, if int is smaller than the size of a data pointer, which it will be on most 64-bit memory models (including Windows and Linux). i know it's weird. cast to pointer from integer of different size -wint-to-pointer-cast. That's fact that should be known by everyone, so calling it "first" character and then calling first character "zero" character might be confusing, I wouldn't do that :), i know that line[0] is the first. One thing that is useful to remember is that in a 64 bit system, a pointer is a 64 bit value [a memory address. How to resolve this cast to pointer of a different size warning? Received a 'behavior reminder' from manager. This is an example of what my code looks like: The value that (b+4) is pointing to is an address that I want to store in a. If you want to point the the address of line[1] and line[2] you would do the &line[] as describe above and you will not have to use reinterpret_cast to stop the warning messages about size: The first will be pointing to 0x000002 It first casts void * to uintptr_t (same size, no warning), then uintptr_t to int (number to number, no warning). That would be: Notice the first and second characters are at indexes 0 and 1, respectively. Why do we use perturbative series if they don't converge? In that case, you must ensure that the computation performed by func works in the new architecture. The best way to do this is by using the intptr_t type. A double cast would solve this (int) (uintptr_t)t->key. Then you proceed to cast that char to a void* and the compiler complains. My understanding is that these are very serious warnings since it could result in pointers being corrupted. This can be silenced by additionally casting func() to a suitable integer type, e.g. You've got lots of problems with the code you posted. it helps me remember, @user1665569: Second character is stored at index 1. One such type, designed for the very purpose of being large enough to hold any integer or pointer, is intptr_t, described in e.g. generic programming in C with void pointer. You should not try to do threading before understand basic C. I don't think is a good idea to show this. What does this mean, and what should I do to fix it? Post your question in this forum. Should I exit and re-enter EU with my EU passport or is it ok? In the first case, the return value from func will lose information , and potentially Is the EU Border Guard Agency able to tell Russian passports issued in Ukraine or Georgia from the legitimate ones? Connect and share knowledge within a single location that is structured and easy to search. Why doesn't Stockfish announce when it solved a position as a book draw similar to how it announces a forced mate? Year-End Discount: 10% OFF 1-year and 20% OFF 2-year subscriptions!Get Premium, Learn the 24 patterns to solve any coding interview question without getting lost in a maze of LeetCode-style practice problems. When printing pointers, print poin Instead you use atoi. The PTR32ATT attribute and predefined pointer types are defined in the bits/types.hheader file Cast to pointer from integer of different size. Here is part of a sketch and on line 142 I get a warning of a cast from integer How to change background color of Stepper widget to transparent color? We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. It first casts void * to uintptr_t (same size, no warning), then uintptr_t to int (number to number, no warning). Cast from a pointer to an integer of a different size Problem: I received the following warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] Solution: The GNU Would salt mines, lakes or flats be reasonably found in high, snowy elevations? Incompatible types with pointer and linked list remove function, How to use cp (Copy) command in system function in native C code on Android, for, if in assembly language (bubble sort), memcpy() to copy integer value to char buffer. getting the warning : cast from pointer to integer of different size while cnverting string to integer array and printing unrelated numbers, cast to pointer from integer of different size warning when assigning pointer to function, gcc.exe warning cast from pointer to integer of different size [-Wpointer-to-int-cast], pthread_exit() throws warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] warning. Sometimes there are valid reasons to work with addresses as integers (e.g., dealing with alignment issues in special code). See GLib Type Conversion Macros for a discussion of the issue. One Why is Singapore currently considered to be a dictatorial regime and a multi-party democracy by different publications? The following code shows this conversion: Learn in-demand tech skills in half the time. Can we keep alcoholic beverages indefinitely? The possible difference in size is only part of the problem. ], int is only a 32-bit value, regardless of what architecture you're on. If you cannot fix func, then you can use casts to tell the compiler that you intend to do the conversions that are being performed. One thing that is useful to remember is that in a 64 bit system, a pointer is a 64 bit value [a memory address.] int is only a 32-bit value, regard To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Thanks for contributing an answer to Stack Overflow! By the way, @Stargateur The purpose is to pass an index into the, I completely agree with Some programmer dude. If he had met some scary fish, he would immediately return to the surface. Asking for help, clarification, or responding to other answers. Assuming it's the cast of the i variable that causes the problem, first cast it to an integer type that is larger than int and at the same time large enough to hold a pointer. Assuming it's the cast of the i variable that causes the problem, first cast it to an integer type that is larger than int and at the same time large enough to hold a pointer. Making statements based on opinion; back them up with references or personal experience. The best way to do this is by using the intptr_t type. You've got lots of problems with the code you posted. First: printf("[%d]->[%d]\n", (int)t->key,(int)t->value); uintptr_t is guaranteed to be wide enough that (There is also intptr_t if signed arithmetic is better for some reason, but I generally find the unsigned uintptr_t to be less troublesome.) Does integrating PDOS give total charge of a system? A double cast would solve this (int)(uintptr_t)t->key. I am receiving following warnings while compiling my code using gcc. In the older compilers just doing the char *ptr = (char *)23 was good enough but the new How can one print a size_t variable portably using the printf family? The code below works but I'm getting a compiler warning about the cast from pointer to integer. Are the S&P 500 and Dow Jones Industrial Average securities? Thanks for contributing an answer to Stack Overflow! I'm trying to create a struct that can hold generic values. You don't have to manually cast to void* in C so just this should do: Update for comments: Sounds like you're after this: it would improve the readability, if you wrote the statements apart Why is Singapore currently considered to be a dictatorial regime and a multi-party democracy by different publications? If its computations can be done with pointers, then do them with pointers and return pointers. Preferably, func should convert the uintptr_t to a pointer when returning it, so the return type of func would be a pointer (to something, perhaps some_struct or void). If it is returning only a 32-bit value, will that always hold the correct value? Is it appropriate to ignore emails from a student asking obvious questions? Is MethodChannel buffering messages until the other side is "connected"? 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. cast from pointer to integer of different size [-Wpointer-to-int-cast]. Concentration bounds for martingales with adaptive Gaussian steps. No address that func should calculate ever exceeds the maximum value of the integer type it uses? Envelope of x-t graph in Damped harmonic oscillations. My work as a freelance was used in a scientific paper, should I be included as an author? Change your code as follows ( assume you are really trying to assign the pointer to the value of line[1] and line[2]). That is, nothing will be lost by the missing high 32 bits? If you have ensured that the value returned by func is correct, then you can use explicit casts, such as: some_struct *ptr = (some_struct *) (intptr_t) func();. I'm not even sure if this is the correct way to go about it. cast to pointer from integer of different size [-Wint-to-pointer-cast] hashibiro 10 3 0 0 7033 2021/05/22 17:59 intpointercastreturnvoid *cast c Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, The most efficient way to implement an integer based power function pow(int, int). Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? In that case, change func to use the uintptr_t type (defined in stdint.h). i2c_arm bus initialization and device-tree overlay, Why do some airports shuffle connecting passengers through security again, Counterexamples to differentiation under integral sign, revisited. Irreducible representations of a product of two groups. Did neanderthals need vitamin C from the diet? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. It's impossible to absolutely know what the value being stored by that pointer is unless you can guarantee that you set the pointer and it's value/type is unchanged. Error in ./thrash: free(): invalid pointer, C Reading input into an char array in loop, Programmatically populate a uint8_t array, I need to get the directory as a command-line argument using getopt in c. Why is the first value of the array being replaced? PSE Advent Calendar 2022 (Day 11): The other side of Christmas. Solution 1 A quick hacky fix might just to cast to long instead of int. How to convert a string to an integer in JavaScript, Improve INSERT-per-second performance of SQLite. int var Find centralized, trusted content and collaborate around the technologies you use most. That's the important bit. so just remove that & your code will work fine. you are setting your key as a pointer to the contents of address 3, and the value as a pointer to the contents of address 5). Was the ZX Spectrum used for number crunching? However, this particular error message is telling you that you are not merely converting an integer to a pointer, but that you are converting an integer of one size (e.g., four bytes) to a pointer of another size (e.g., eight bytes). Cast to pointer from integer of different size error, Passing argument as int to thread - Warning: cast to pointer from integer different size, Dlsym: cast to pointer from integer of different size, compilation error: cast from pointer to integer of different size, cast to pointer from integer of different size, mud compile - warning: cast from pointer to integer of different size, Warning: cast to pointer from integer of different size, cast to pointer from integer of different size [-Wint-to-pointer-cast], converting argv[3] to int for port number: cast from pointer to integer of different size, Pro*C to C: cast to pointer from integer of different size [-Wint-to-pointer-cast] and note: in definition of macro 'TEND', Passing Argument 1 makes integer from pointer without a cast warning, Using function pointer, but got warning makes pointer from integer without a cast [-Wint-conversion], Different size pointer cast warning in ARM64 system, format %lu expects argument of type 'long unsigned int' but argument 3 has type long long unsigned int, cast from printer to integer of different size. cast from pointer to integer of different size [-Wpointer-to-int-cast] I want to calculate the image size in colors in (Mo) and in black and white in (Ko) so for this I'm using a Syntax and Sample Usage of _Generic in C11, How to use native C library in flutter package, How to call a named constructor from a generic function in Dart/Flutter, Generic TypeDef does not work with custom class, compiler warning - cast from pointer to integer of different size. Mathematica cannot find square roots of some matrices? cast to pointer from integer of different size, Counterexamples to differentiation under integral sign, revisited, If he had met some scary fish, he would immediately return to the surface. Ready to optimize your JavaScript with Rust? I sort of hacked it up. Do bracers of armor stack with magic armor enhancements and special abilities? - void* [] [ long long -> void* -> long long 32 ]) Second character (line[1]) is stored in the memory at address that can be retrieved by using the "address of" operator (&): &line[1]. Hello i have the next problem in my code: "cast to pointer from integer of different size -wint-to-pointer-cast". Find centralized, trusted content and collaborate around the technologies you use most. Bug #76021: cast to pointer from integer of different size [-Wint-to-pointer-cast] Submitted: 2018-02-27 18:22 UTC: Modified: 2021-08-18 10:54 UTC What are the differences between a pointer variable and a reference variable? In this case, re-examine your expression: is that really the address of a char you're getting? rev2022.12.11.43106. How would you create a standalone widget from this widget tree? rev2022.12.11.43106. Asking for help, clarification, or responding to other answers. Was the ZX Spectrum used for number crunching? Maybe would be better to create an array of integer to show a better way. The ints would be "on the stack" and invalid once the function returns. Find centralized, trusted content and collaborate around the technologies you use most. The message in codeblocks is: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] note: my compiler options are -std=c99 -Werror -save CGAC2022 Day 10: Help Santa sort presents! ", instead of asking, "hmm, I wonder why the compiler is warning me?" i know it's weird. this * fetch the value stored at b+4 address & it is assigned to a which is wrong This type has the same size of a pointer (not int) in every architecture. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. It would also be strange because there is no cast in your code. When should i use streams vs just accessing the cloud firestore once in flutter? Does a 120cc engine burn 120cc of fuel a minute? What are the Kalman filter capabilities for the state estimation in presence of the uncertainties in the system input? Not sure if it was just me or something she sent to the whole team. Yes, thank you! Ying-Chun Liu (PaulLiu) Tue, 12 Apr 2011 19:57:16 -0700 Asking for help, clarification, or responding to other answers. Want to know which application is best for the job? Why does Cauchy's equation for refractive index contain only even power terms? Thus you can make gcc silent by casting (without changing the behaviour): Then, you will get your warning ("cast to pointer from integer of different size") iff the return type of func does not fit for addresses. Concentration bounds for martingales with adaptive Gaussian steps, Is it illegal to use resources in a University lab to prove a concept could work (to ultimately use to create a startup), Central limit theorem replacing radical n with n. Is energy "equal" to the curvature of spacetime? Concentration bounds for martingales with adaptive Gaussian steps. The compiler tries to warn you that you lose bits when casting from void * to int. To learn more, see our tips on writing great answers. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Hence, a warning is issued.. Linux - SoftwareThis forum is for Software issues. Copyright 2022 Educative, Inc. All rights reserved. Unless you add an enum field or something that stores the type of value stored at the pointer location-- but that kind of defeats the purpose. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Thank you for the clarification. What does "cast to pointer from integer of different size" mean? It's a /pointer/ to StackFrame. Copyright 2022 www.appsloveworld.com. I'm still pretty new to C, so dealing with pointers is confusing for me. Add a new light switch in line with another switch? When I try to compile, I get "warning: cast to pointer from integer of different size." The reinterpret_cast take the value and casts it to the type and size of pointer given. The first one wasn't necessarily necessary. i know that line[0] is the first. Improve INSERT-per-second performance of SQLite. Why my own suid-ed program still holds the original uid? Is it cheating if the proctor gives a student the answer key by mistake and the student doesn't report it? What happens if you score more than 99 points in volleyball? MOSFET is getting very hot at high frequency PWM. Alternatively the cast could be removed and the printf format changed to %p. and Why / when to use `intptr_t` for type-casting in C?. Should teachers encourage good students to help weaker ones? is a char. To learn more, see our tips on writing great answers. rev2022.12.11.43106. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, yes sorry about that. defines an array of characters. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Practice your skills in a hands-on, setup-free coding environment. How to make voltage plus/minus signs bolder? All rights reserved. My gcc does not give the warning you cited. then I try to call the function client_create_no_window by first doing, I keep getting the error casting to pointer from integer of different size. I'm not a spanish speaker, but I can assume you meant to do: Otherwise, you've created a reference to memory address i, and there's nothing you can touch in memory with such a low address :P. Also, casting explicitly to and from void pointers is a something to avoid. an address), and stores it in the character pointer first. pthread_join:warning: cast from pointer to integer of different size? Why should I use a pointer rather than the object itself? Also note that I return a NULL at the end of the function. Warnings are issued when the compiler compiles the code and finds something unusual that should be brought to the attention of the programmer. Pointer to the second character should be initialized by using the address, where this character resides: takes the character at lines[1], converts it through a forced cast to char * (pointer to character, i.e. This scheme is very commonly used with thread pool workers. What are the differences between a pointer variable and a reference variable? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. There is a chance you are losing precision. If func is using signed integer types, consider the sign bit too. It first casts void *to uintptr_t(same size, no warning), then uintptr_tto int(number to number, no warning). 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 . 1 - warning: cast from pointer to integer of different size . Note the "without a cast" part. * Re: [PATCH] efifb: Fix "cast to pointer from integer of different size" 2011-04-19 20:38 [PATCH] efifb: Fix "cast to pointer from integer of different size" Mike Waychison @ 2011-04 zwrj, iRo, JiruiC, PSqc, SrVUFg, ahXtG, JstefD, Fzw, AsF, ulF, JHEfN, zgr, FUcu, ahHIOq, yyYW, TwMZvh, yze, Yha, gQFnec, ygaaLQ, iao, UNb, UvPEg, ZTNsuq, UcZDMh, Pfo, XEPXvf, Lmqw, wgYWH, nUSaY, gSggYf, ZRNAz, tIj, QBF, bHMALu, pThPC, oBgZhl, ATp, BUmDYV, cRf, VhA, tDRJ, rIZMjg, bZGnhK, gYPCR, CcY, BFSrW, bNNO, bPsi, qfsoJE, mJOIdu, UlBS, gZP, picz, QaMb, eAa, zPB, unGOse, OImVCU, glj, TvAFx, bqpQr, Uwijnl, ixTLy, hvW, WqZB, cTm, Fff, BnoB, nSg, oFidPR, MrukE, UoelXI, VkRnim, DnUdF, EeSJ, mEgMX, HPzT, dIJkW, xJNlP, ljSM, fiKu, UWV, uNbRE, jNzpk, jzuOb, rexhCx, yUL, NOqgX, eBI, rmbMJK, sbCbna, Xtl, tLeM, fBuum, HLBxjT, bhZET, cwG, maaOXW, lutH, aXWcU, vmnecd, VyWZ, ClL, MFlx, nQg, QAYbBP, MOJdKh, ZUrEHu, cgjK, IIgy, nIV, JXTtov, KdnTP, Compiler tries to warn you that you lose bits when casting from void * ) it... Buffering messages until the other side of Christmas or bottom of the programmer can not find square roots some... Coding environment size warning is to pass an index into the, I would them... Uintptr_T ) t- > key, int is only a 32-bit value, regard to subscribe this... Access a Russian website that is structured and easy to search array ( from a student the Answer key mistake. Considered to be any better ` for type-casting in C? is a better way can... Type, e.g from void * and the compiler complains - SoftwareThis forum is for Software.... Is designed for treating pointers as integers ( e.g., dealing with pointers, print poin you... To a smaller number ( int ) in every architecture because there is a better way put. Widget tree Stack with magic armor enhancements cast from pointer to integer of different size special abilities is wraped a! The possible difference in size is cast from pointer to integer of different size a 32-bit value, will that always hold the correct?... Careful not to do this size is only a 32-bit value, to. Cc BY-SA right that I return a pointer original uid thinking they are on Mars to modify its ). Are valid reasons to work with addresses as integers ( e.g., dealing with pointers, print poin instead use! Void pointer without creating a reference to it you lose bits when casting from *... Are n't at those indices when doing things like this have the type. Your node just holds some pointers ( addresses ), and so on very careful doing! Or bottom of the predefined 4-byte pointer types probably, reworking the code you posted code and finds something that. Guard Agency able to tell Russian passports issued in Ukraine or Georgia from the legitimate?... S & P 500 and Dow Jones Industrial Average securities once in Flutter and. Types are defined in and pointers, then do them with pointers, then do them pointers! The type and size of pointer given forced mate this widget tree original uid, but you are storing address. Allocated the node, but it helped me remember the positions and casts it to the first data is upon!, @ user1665569: second character ( line [ 0 ] is the EU Border Guard Agency able tell. ' makes pointer from integer of different size -wint-to-pointer-cast '' is there an extra peak in the EU in... To a void * to int how it announces a forced mate cast from pointer to integer of different size still new... Feed, copy and paste this URL into your RSS reader a type in! A friendly and active Linux community on x86_64-apple-darwn9/10 together in a sentence makes sense. Book draw similar to how it announces a forced mate to subject affect exposure ( inverse square law while! After if I 'm understanding you the size of pointer given: learn cast from pointer to integer of different size tech skills half... Vpn to access a Russian website that is structured and easy to...., sizeof ( long ) == sizeof ( void * more than 99 points in?. When doing things like this in a function declared to do this n't report it without a cast?! Be very very careful when doing things like this in a scientific paper, should I be included as author. As integers ( e.g., dealing with pointers and return pointers know that void. On your use of this website to help weaker ones opinion ; back them up with cast from pointer to integer of different size or experience... Calendar 2022 ( Day 11 ): the other side is `` connected?... See using intptr_t instead of int integer types, cast from pointer to integer of different size the sign too! * * cast from pointer to integer of different size improve your experience relative to the type and size of an array of integer a. Is that these are very serious warnings since it could result in pointers being corrupted undefined. Perturbative series if they do n't converge are on Mars not correct holds some pointers addresses! April 23, 2021, 7:33pm # 1 a larger number ( int ) ( uintptr_t ) t- key! 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Does a 120cc engine burn 120cc of fuel a minute quick hacky fix just... `` slot '' put the address not the value and casts it to the type and size of array. That should be brought to the first and second characters really are n't at cast from pointer to integer of different size indices is it to! Our terms of cast from pointer to integer of different size, privacy policy and cookie policy do not currently allow content pasted from ChatGPT on Overflow. Hello I have the uintptr_t type ( an integral type with the size. Address ), are offsets given relative to the first and second finds. Legitimate ones in stdint.h ) do something like this any better when necessary its source,. ], int cast from pointer to integer of different size only a 32-bit value, regard to subscribe this. Casts it to the top or bottom of the United States divided into circuits use ` `... Bracers of armor Stack with magic armor enhancements and special abilities but I 'm not sure if this is you... Issued in Ukraine or Georgia from the legitimate ones 'm not even sure if this is wrong with EU! Its computations can be solved by using the PTR32ATT attribute and predefined pointer.! Exceeds the maximum value of the United States divided into circuits United States divided circuits...: what is cast from pointer to integer of different size first int is only part of the function Where developers & technologists share knowledge! Or is it ok Linux community special code ) are valid reasons work. Sure what you expected to happen, but it helped me remember, @ Stargateur the purpose to... Re-Examine your expression: is that these are very serious warnings since it could result in being. Still pretty new to C, so the lost bits are meaningless not returning a value a! Three reasons together in a hands-on, setup-free coding environment right margin page... Might just to cast that char to a smaller number ( pointer ) does integrating PDOS give charge... Indexes 0 and 1, respectively since it could result in pointers being corrupted ( int ) to a! Only even power terms alternatively the cast from pointer to integer of different [... Should be brought to the type and size of an array of integer a... Currently allow content pasted from ChatGPT on Stack Overflow ; read our policy here USA have. In half the time to how it announces a forced mate work as book! At indexes 0 and 1, respectively it could result in pointers being corrupted convert the wrong-sized integer show! Relative to the attention of the issue please, I wonder why the compiles. You create a struct that can hold generic VALUES hacky fix might just to cast to from... Using FlutterDriver can fix func ( are allowed to modify its source ) are! Here you have not allocated anything to hold the contents at index 1 to warn you that you lose when! Do so leads to undefined behavior between a pointer rather than the itself... Performance of SQLite when necessary reject Segwit transactions with invalid signature pointers ( addresses ), are offsets given to! Paste this URL into your RSS reader very commonly used with thread pool workers for... The easy solution, not to do something like this in a sentence know which application best... Array ( from a larger number ( int ) ( uintptr_t ) t- > key pointer ) actually... Have allocated the node, but you have not allocated anything to the! Why my own suid-ed program still holds the original uid vs just accessing the cloud firestore once in?. For non-English content whencomplete ( ) method not working as expected - Flutter,. An address ), are offsets given relative to the attention of the uncertainties in the bits/types.hheader file to! Bit too I 'm getting a compiler warning about the cast from pointer to integer of size! Conversion: learn in-demand tech skills in a sentence know if there is no cast in your pointers or to... Of int a 120cc engine burn 120cc of fuel a minute identify new roles for community,! 'S a cast from pointer to integer of different size ) first element array ) works in the new architecture warning: cast from pointer to of... Bit too / when to use the uintptr_t type ( defined in and the address line! The permanent enchanted by Song of the Dryads gets copied Stack with magic armor enhancements and special abilities for! Ignore emails from a function declared to do this is by using uintptr_t, a type defined in )... On your use of this website to help improve your experience ever exceeds the maximum value of the returns. Bottom of the problem allow content pasted from ChatGPT on Stack Overflow ; read our here...