source: buchla-68k/orig/BUCHLA/CURTAB.C

/*
   =============================================================================
        curtab.c -- compute sine wave cursor table for waveshape editor
        Written by D.N. Lynx Crowe -- see VER below for version
   =============================================================================
*/

#define VER     "Version 4 -- 1987-10-07"

#define DEBUGIT         0

#include "stdio.h"
#include "limits.h"
#include "math.h"
#include "stddefs.h"

#define TWOPI   ((double)(2.0 * PI))

#define TABLEN  256
#define DTABLEN ((double)256.0)

#define LO_LIM  64
#define HI_LIM  192

#define ADJUSTER        ((double)32768.0)

#define THE_FILE        "wdcurtab.dat"

char    *fname1;

int     t[TABLEN];
double  k[TABLEN];
double  m[TABLEN];

/* 

*/

/*
   =============================================================================
        curtab.c:  main -- compute sine wave cursor table for waveshape editor
   =============================================================================
*/

main()
{
        register FILE *fp1;
        register int i, j;
        double q;

        printf("Buchla 700 Waveshape Cursor Table Generator %s\n", VER);

        fname1 = THE_FILE;

        if( (fp1 = fopen(fname1, "wa")) EQ NULL)  {

                printf("curtab:  ERROR - couldn't open [%s]\n", fname1);
                exit();
        }

        printf("curtab:  Creating %d entry waveshape cursor table\n", TABLEN);

        q = TWOPI / DTABLEN;

        for(i = 0; i < TABLEN; i++) {

                k[i] = sin((double)i * q);

                if(k[i] GE (double)1.0)
                        k[i] = (double)0.999999;

                m[i] = (k[i] + (double)1.0) / (double)2.0;
                t[i] = m[i] * ADJUSTER;

#if DEBUGIT
                if (! (i & 0x00000007))
                        printf("%4d %04x %04.4x %10.8f %11.8f\n",
                                i, i, (t[i] & 0x0000FFFF), k[i], m[i]);
#endif
        }

        printf("curtab:  Writing entries %d thru %d to file [%s]\n",
                LO_LIM, (HI_LIM - 1), fname1);

        for (i = LO_LIM , j = 0; i < HI_LIM; i++ , j++)
                fprintf(fp1, "\t0x%04.4x,\t/* %4d  %4d  %11.8f %11.8f */\n",
                        (t[i] & 0x0000FFFF), j, i, k[i], m[i]);

        fclose(fp1);

        printf("curtab:  Output complete on [%s].\n", fname1);
}