Error: cast increases pointer alignment
WebSep 26, 2024 · In this compliant solution, the char value is stored into an object of type int so that the pointer's value will be properly aligned: #include void func (void) { char c = 'x'; int i = c; int *ip = &i; assert (ip == &i); } Noncompliant Code Example The C Standard allows any object pointer to be cast to and from void *. WebMar 14, 2016 · If you are doing any pointer arithmetic - e.g.: ++ptr, ptr++, ptr + 1, [1], etc. - then the offsets calculated by the compiler may be wrong. The compiler uses the type of the pointer to calculate how many bytes to increment (or decrement) the pointer. - Wayne Wednesday, March 2, 2016 10:21 AM 0 Sign in to vote
Error: cast increases pointer alignment
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WebJan 24, 2024 · And now we compile it: /home/andy/tmp/test.zig:8:17: error: cast increases pointer alignment const foo = @ptrCast (&Foo, &array [0]); ^ /home/andy/tmp/test.zig:8:38: note: '&u8' has alignment 1 const foo = @ptrCast (&Foo, &array [0]); ^ /home/andy/tmp/test.zig:8:27: note: '&Foo' has alignment 4 const foo = @ptrCast (&Foo, … WebI am porting code from (x86, ppc) platform to ARM-15. It uses LINUX os, GCC compiler. Goal is to write platform independent code. When I compile my code (on ARM), I am …
WebOct 16, 2024 · Tags C C++ memory programming. CPUs used to perform better when memory accesses are aligned, that is when the pointer value is a multiple of the alignment value. This differentiation still exists in … WebIf you have a pointer or a slice that has a small alignment, but you know that it actually has a bigger alignment, use @alignCast to change the pointer into a more aligned pointer. This is a no-op at runtime, but inserts a safety check : test.zig
WebMay 15, 2014 · A simple solution to your problem is to declare the array thus: FatCache is array of unsigned long FatCache [128]; fat32Buffer = FatCache; If you later need to … WebOct 8, 2005 · The warning is there to tell you that you're casting from one type to another and this 'another' type is larger in size, which might imply a certain alignment …
WebBut you (and the programmer for getaddrinfo ...) know that the pointer p->ai_addr already points to an actual struct addr_in, so the cast is valid. You can either: let the warning fire and ignore it - after all it is just a warning... silence it with -Wno-cast-align after -Weverything
WebMay 30, 2013 · Hopefully it's obvious that a "real" implementation would be a bit more complex, but the basic point is that I've got data coming from somewhere, I know that it's … density of co2 at 120fWebJun 18, 2024 · The problem is a pointer to bytes is align 1 but a pointer to usize is align 8 (on 64 bit), zig will not let you cast any byte pointer to usize without an align cast which … density of clay bricksffx 2 almighty shinraWebOn the face of it, it appears you introduced that typecast to stop the compiler complaining about something else (eg you are trying to supply the address of a "struct prefix" to a function that expects a pointer to "struct addr32", and you've tried to use a typecast to force the compiler to permit that). ffx-2 best creature teamWebMar 17, 2013 · Your compiler can help you out with the most common cause of the Address Error: the -Wcast-align flag. Every time you cast a value to something that is bigger than the initial one, you can get into serious problems. This flag will give a warning when you use constructs like this one: 1 char *a_char_pointer; 2 ffx-2.5WebFeb 19, 2024 · error: cast increases required alignment of target type [-Werror=cast-align] testdata pointer needs to point to the portion of memory that contains an array of data of type struct data. So I need a pointer so that later I can apply an index to testdata. Offset … density of cngWebThere is a big issue with this: the cast to int *, which is undefined behavior according to the C standard 1. And it is because things can go wrong in at least two ways, first due to pointer aliasing rules, second due to type alignment. ffx2 brother fiend tale