common.h

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#ifndef C8_COMMON_H
#define C8_COMMON_H
 
#ifdef TEST
#define C8_STATIC
#define C8_INLINE
#else
#define C8_STATIC static
#define C8_INLINE inline
#endif
 
#ifndef C8_VERSION
#define C8_VERSION "unknown"
#endif
 
#define C8_X(i) ((i & 0x0F00) >> 8)
 
#define C8_Y(i) ((i & 0x00F0) >> 4)
 
#define C8_NNN(i) (i & 0x0FFF)
 
#define C8_A(i) ((i & 0xF000) >> 12)
 
#define C8_B(i) (i & 0x000F)
 
#define C8_KK(i) (i & 0x00FF)
 
#define C8_EXPAND(i)                                                                               \
    uint8_t  x   = C8_X(i);                                                                        \
    uint8_t  y   = C8_Y(i);                                                                        \
    uint16_t nnn = C8_NNN(i);                                                                      \
    uint8_t  a   = C8_A(i);                                                                        \
    uint8_t  b   = C8_B(i);                                                                        \
    uint8_t  kk  = C8_KK(i);
 
#define C8_PROG_START 0x200
 
#define C8_MEMSIZE 0x1000
 
#endif