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+---- Forum: 8.11 Pointer type conversions (https://forum.misra.org.uk/forumdisplay.php?fid=166)
+---- Thread: Rule 11.3 (/showthread.php?tid=1024)
Rule 11.3 - schileboh - 31-01-2014
hello guys
i've a problem. i'm not sure if the following code is compliant to the Rule 11.3:
Code:
typedef struct SomeHeaderType
{
uint8_t type;
uint32_t timestamp;
uint16_t some_attribute;
}SomeHeaderType;
void foo(uint8_t *buffer_ptr)
{
SomeHeaderType *headerPtr = (SomeHeaderType*)buffer_ptr;
if(headerPtr->type == 3)
{
uint16_t attribute = headerPtr->some_attribute;
...
}
...
}is it allowed to cast a 8-bit buffer pointer to a struct pointer? from my point of view, this code is not compliant, but i have some code examples here that do this and the code suggests to be MISRA conform...
thanks for clarification.
Re: Rule 11.3 - misra-c - 20-02-2014
You are correct in saying that the cast from "pointer to unsigned 8-bit" to "pointer to struct" is not compliant with rule 11.3.