is_code

#define MS_CLS  0x00000600             // Mask for typing
#define FF_CODE 0x00000600             // Code ?
#define FF_DATA 0x00000400             // Data ?
#define FF_TAIL 0x00000200             // Tail ?
#define FF_UNK  0x00000000             // Unknown ?

#define is_code(F) ((F & MS_CLS) == FF_CODE) // is code byte? #define is_data(F) ((F & MS_CLS) == FF_DATA) // is data byte? #define is_tail(F) ((F & MS_CLS) == FF_TAIL) // is tail byte? #define is_unknown(F) ((F & MS_CLS) == FF_UNK) // is unexplored byte? #define is_head(F) ((F & FF_DATA) != 0) // is start of code/data?

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