Synopsis #

Header: fxcg/misc.h
Syscall index: 0x0160
Function signature: int BCDtoInternal(struct BCDinternal* target, struct BCDvalue* source)

Converts a BCD-coded digit to its special internal representation. Helps saving code when converting a BCD value to a double.

Parameters #

target

Pointer to a struct that will hold the conversion result. The struct is as follows:

struct BCDinternal {
  int exponent;
  int sign;
  int unknown;
  char mantissa[15];
}

• source - pointer to BCD value to convert. The struct containing it is as follows:

  typedef struct {
    unsigned char hnibble:4;
    unsigned char lnibble:4;
  } BCDbyte;
  
  struct BCDvalue {
    unsigned short exponent:12;
    unsigned short mantissa0:4;
    BCDbyte mantissa[7];
    char flags;
    short info;
  };
  

Returns #

0 on success, -1 on error.