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A use of the offsetof preprocessor macro defined in <stddef.h>.
| Class Name | Use of offsetof | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | style | ||||||||||||||||||
| Mnemonic | BADMACRO.OFFSETOF | ||||||||||||||||||
| Categories |
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| Availability | Available for C and C++. |
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| Enabling | Checks for this warning class are
disabled by default. To enable them, add the following WARNING_FILTER
rule to the project configuration file.
WARNING_FILTER += allow class="Use of offsetof" |
/* BADMACRO.OFFSETOF.a.c */ #include <stddef.h> struct ptrstruct {int x; int y;}; int getoffset(void){ return offsetof(struct ptrstruct,y); /* 'Use of offsetof' warning issued here */ }
/* BADMACRO.OFFSETOF.b.c */ #define offsetof(a,b) (a+b) int getoffset2(void){ return offsetof(1,2); /* ok: not the offsetof macro defined in <stddef.h> */ }
This class is implemented using a BAD_MACRO_* rule set in the general template configuration file.
The following configuration file parameters affect checks for this warning class.
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