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C/C++ Source or Header  |  1997-07-05  |  3KB  |  76 lines
  1. /* +++Date last modified: 05-Jul-1997 */
  2.  
  3. /*
  4. **  SNIPMATH.H - Header file for SNIPPETS math functions and macros
  5. */
  6.  
  7. #ifndef SNIPMATH__H
  8. #define SNIPMATH__H
  9.  
  10. #include <math.h>
  11. #include "sniptype.h"
  12. #include "round.h"
  13.  
  14. /*
  15. **  Callable library functions begin here
  16. */
  17.  
  18. void    SetBCDLen(int n);                             /* Bcdl.C         */
  19. long    BCDtoLong(char *BCDNum);                      /* Bcdl.C         */
  20. void    LongtoBCD(long num, char BCDNum[]);           /* Bcdl.C         */
  21. double  bcd_to_double(void *buf, size_t len,          /* Bcdd.C         */
  22.                       int digits);
  23. int     double_to_bcd(double arg, char *buf,          /* Bcdd.C         */
  24.                       size_t length, size_t digits );
  25. DWORD   ncomb1 (int n, int m);                        /* Combin.C       */
  26. DWORD   ncomb2 (int n, int m);                        /* Combin.C       */
  27. void    SolveCubic(double a, double b, double c,      /* Cubic.C        */
  28.                   double d, int *solutions,
  29.                   double *x);
  30. DWORD   dbl2ulong(double t);                          /* Dbl2Long.C     */
  31. long    dbl2long(double t);                           /* Dbl2Long.C     */
  32. double  dround(double x);                             /* Dblround.C     */
  33.  
  34. /* Use #defines for Permutations and Combinations     -- Factoryl.C     */
  35.  
  36. #define log10P(n,r) (log10factorial(n)-log10factorial((n)-(r)))
  37. #define log10C(n,r) (log10P((n),(r))-log10factorial(r))
  38.  
  39. double  log10factorial(double N);                     /* Factoryl.C     */
  40.  
  41. double  fibo(unsigned short term);                    /* Fibo.C         */
  42. double  frandom(int n);                               /* Frand.C        */
  43. double  ipow(double x, int n);                        /* Ipow.C         */
  44. int     ispow2(int x);                                /* Ispow2.C       */
  45. long    double ldfloor(long double a);                /* Ldfloor.C      */
  46. int     initlogscale(long dmax, long rmax);           /* Logscale.C     */
  47. long    logscale(long d);                             /* Logscale.C     */
  48.  
  49. float   MSBINToIEEE(float f);                         /* Msb2Ieee.C     */
  50. float   IEEEToMSBIN(float f);                         /* Msb2Ieee.C     */
  51. int     perm_index (char pit[], int size);            /* Perm_Idx.C     */
  52. int     round_div(int n, int d);                      /* Rnd_Div.C      */
  53. long    round_ldiv(long n, long d);                   /* Rnd_Div.C      */
  54. double  rad2deg(double rad);                          /* Rad2Deg.C      */
  55. double  deg2rad(double deg);                          /* Rad2Deg.C      */
  56.  
  57. #include "pi.h"
  58. #ifndef PHI
  59.  #define PHI      ((1.0+sqrt(5.0))/2.0)         /* the golden number    */
  60.  #define INV_PHI  (1.0/PHI)                     /* the golden ratio     */
  61. #endif
  62.  
  63. /*
  64. **  File: ISQRT.C
  65. */
  66.  
  67. struct int_sqrt {
  68.       unsigned sqrt,
  69.                frac;
  70. };
  71.  
  72. void usqrt(unsigned long x, struct int_sqrt *q);
  73.  
  74.  
  75. #endif /* SNIPMATH__H */
  76.