/*
   =============================================================================
	etiosc.c -- MIDAS instrument editor -- oscillator field handlers
	Version 31 -- 1988-10-27 -- D.N. Lynx Crowe
   =============================================================================
*/

#include "ram.h"

/* initialized variables */

/*		    C  C# D  D# E  F  F# G  G# A  A# B	*/
int16_t	notes[]  = {2, 2, 3, 3, 4, 5, 5, 6, 6, 0, 0, 1};

/*		        A     B     C     D     E     F     G	*/
int16_t	pitches[] = { 900, 1100,    0,  200,  400,  500,  700};

#include "ratio.h"	/* short ratio[]; */

/*		    C  C# D  D# E  F  F# G  G# A  A# B	*/
int16_t	sharps[] = {7, 9, 7, 9, 7, 7, 9, 7, 9, 7, 9, 7};

int16_t	shrpflt[] = {  0, -100,    100};

int8_t	sfdsp[]   = {' ', D_FLAT,  D_SHARP};

static	int8_t	intstr[] = "+0000";
static	int8_t	ratstr[] = "1/1";
static	int8_t	frqstr[] = "00.0";
static	int8_t	pchstr[] = "0C 00";

int16_t	ndvals[10] = {0, 0, 1200, 1902, 2400, 2786, 3102, 3369, 3600, 3804};


/* 
*/

/*
   =============================================================================
	int2rat() -- convert interval to ratio
   =============================================================================
*/

void int2rat(int16_t rat)
{
	register int16_t den, inum, num;

	ebuf[0] = '1';
	ebuf[1] = '/';
	ebuf[2] = '1';
	ebuf[3] = '\0';

	for (num = 1; num < 10; num++) {

		inum = 10 * num;

		for (den = 1; den < 10; den++) {

			if (rat EQ ratio[inum + den]) {

				ebuf[0] = num + '0';
				ebuf[2] = den + '0';
				return;
			}
		}
	}
}

/* 
*/

/*
   =============================================================================
	cnvc2p() -- convert cents to pitch
   =============================================================================
*/

void cnvc2p(int8_t *buf, int16_t cv)
{
	int16_t	rem, tmp;

	cv -= 160;
	buf[0] = cv / 1200;
	rem = cv - (buf[0] * 1200);
	tmp = rem / 100;
	rem -= (tmp * 100);
	buf[1] = notes[tmp];
	buf[2] = sharps[tmp];
	buf[3] = rem / 10;
	buf[4] = rem - (buf[3] * 10);
}

/* 
*/

/*
   =============================================================================
	cnvp2c() -- convert pitch to cents

	input in edit buffer:

		ebuf[0] = octave		0..9
		ebuf[1] = note			A..G  (0..6)
		ebuf[2] = type			natural, flat, sharp  (7..9)
		ebuf[3] = ms byte of offset	0..9
		ebuf[4] = ls byte of offset	0..9

	output in cents
   =============================================================================
*/

int16_t cnvp2c(void)
{
	if (ebuf[0] EQ 9)		/* high limit is C9 00 */
		if (ebuf[1] GT 2)
			return(FAILURE);
		else if (ebuf[1] EQ 2)
			if (ebuf[2] NE 7)
				return(FAILURE);
			else if (ebuf[3] OR ebuf[4])
				return(FAILURE);

	cents = (ebuf[0] * 1200) + pitches[ebuf[1]] + shrpflt[ebuf[2] - 7]
		+ (ebuf[3] * 10) + ebuf[4] + 160;

	return(SUCCESS);
}

/* 
*/

/*
   =============================================================================
	et_iosc() -- load the edit buffer
   =============================================================================
*/

int16_t et_iosc(int16_t nn)
{
	register struct instdef *ip;
	register int16_t val, ctl, fh, fl, v;

	v = (nn >> 8) & 0x03;
	ip = &vbufs[curvce];

	switch (v) {

	case 0:

		val = ip->idhos1v;
		ctl = ip->idhos1c;
		break;

	case 1:

		val = ip->idhos2v;
		ctl = ip->idhos2c;
		break;

	case 2:

		val = ip->idhos3v;
		ctl = ip->idhos3c;
		break;

	case 3:

		val = ip->idhos4v;
		ctl = ip->idhos4c;
		break;
	}
/* 
*/
	bform = ctl & OC_MOD;

	switch (bform) {

	case OC_INT:		/* interval */

		sprintf(ebuf, "%04d%c", ((val < 0 ? -val : val) >> 1),
			(val < 0 ? '-' : '+'));

		ebflag = TRUE;
		return(SUCCESS);

	case OC_RAT:		/* ratio */

		int2rat(val >> 1);
		ebflag = TRUE;
		return(SUCCESS);

	case OC_FRQ:		/* frequency */

		fh = (val >> 1) / 10;
		fl = (val >> 1) - (fh * 10);

		sprintf(ebuf, "%02d.%d", fh, fl);
		ebflag = TRUE;
		return(SUCCESS);

	case OC_PCH:

		cnvc2p(ebuf, (val >> 1));
		ebflag = TRUE;
		return(SUCCESS);
	}

	return(FAILURE);
}

/* 
*/

/*
   =============================================================================
	setoval() -- set oscillator mode and pitch/ratio variables
   =============================================================================
*/

void setoval(struct instdef *ip, int16_t v, int16_t val)
{
	switch (v) {

	case 0:

		ip->idhos1v = val << 1;
		ip->idhos1c = (ip->idhos1c & ~OC_MOD) | bform;
		break;

	case 1:

		ip->idhos2v = val << 1;
		ip->idhos2c = (ip->idhos2c & ~OC_MOD) | bform;
		break;

	case 2:

		ip->idhos3v = val << 1;
		ip->idhos3c = (ip->idhos3c & ~OC_MOD) | bform;
		break;

	case 3:

		ip->idhos4v = val << 1;
		ip->idhos4c = (ip->idhos4c & ~OC_MOD) | bform;
		break;
	}

	ip->idhfnc[v].idftmd = (ip->idhfnc[v].idftmd & ~I_NRATIO)
		| ((bform & 2) ? I_NRATIO : 0);
}

/* 
*/

/*
   =============================================================================
	ef_iosc() -- unload (parse) edit buffer
   =============================================================================
*/

int16_t ef_iosc(int16_t nn)
{
	register struct instdef *ip;
	register int16_t v, i, tmp;

	v = (nn >> 8) & 3;
	ip = &vbufs[curvce];
	ebflag = FALSE;

	switch (bform) {

	case OC_INT:		/* interval */

		tmp = 0;

		for (i = 0; i < 4; i++)
			tmp = (tmp * 10) + (ebuf[i] - '0');

		if (ebuf[4] EQ '-')
			tmp = -tmp;

		setoval(ip, v, tmp);
		modinst();
		return(SUCCESS);

	case OC_RAT:		/* ratio */

		tmp = ndvals[ebuf[0] - '0'] - ndvals[ebuf[2] - '0'];

		setoval(ip, v, tmp);
		modinst();
		return(SUCCESS);
/* 
*/
	case OC_FRQ:		/* frequency */

		tmp = 0;

		for (i = 0; i < 2; i++)
			tmp = (tmp * 10) + ebuf[i] - '0';

		tmp = (tmp * 10) + ebuf[3] - '0';

		if (tmp GT 159)
			return(FAILURE);

		setoval(ip, v, tmp);
		modinst();
		return(SUCCESS);

	case OC_PCH:		/* pitch */

		if (cnvp2c() EQ FAILURE)
			return(FAILURE);

		setoval(ip, v, cents);
		modinst();
		return(SUCCESS);
	}

	return(FAILURE);
}

/* 
*/

/*
   =============================================================================
	rd_iosc() -- (re)display the field
   =============================================================================
*/

int16_t rd_iosc(int16_t nn)
{
	register struct instdef *ip;
	register int16_t val, ctl, fh, fl, v;
	int16_t n;
	int8_t ocs;

	v = (nn >> 8) & 0x03;
	n = nn & 0xFF;
	ip = &vbufs[curvce];

	switch (v) {

	case 0:

		val = ip->idhos1v;
		ctl = ip->idhos1c;
		break;

	case 1:

		val = ip->idhos2v;
		ctl = ip->idhos2c;
		break;

	case 2:

		val = ip->idhos3v;
		ctl = ip->idhos3c;
		break;

	case 3:

		val = ip->idhos4v;
		ctl = ip->idhos4c;
		break;
	}
/* 
*/
	bform = ctl & OC_MOD;
	ocs = ((v EQ 3) ? ' ' : (ctl & OC_SYN ? 'S' : 's'));

	switch (bform) {

	case OC_INT:		/* interval */

		sprintf(dspbuf, "Int %c%04d %c",
			(val < 0 ? '-' : '+'),
			((val < 0 ? -val : val) >> 1),
			ocs);
		break;

	case OC_RAT:		/* ratio */

		int2rat(val >> 1);
		sprintf(dspbuf, "Rat %c/%c   %c", ebuf[0], ebuf[2], ocs);
		break;

	case OC_FRQ:		/* frequency */

		fh = (val >> 1) / 10;
		fl = (val >> 1) - (fh * 10);

		sprintf(dspbuf, "Frq %02d.%d  %c", fh, fl, ocs);
		break;

	case OC_PCH:

		strcpy(dspbuf, "Pch ");
		cnvc2p(&dspbuf[4], (val >> 1));
		dspbuf[4] += '0';
		dspbuf[5] += 'A';
		dspbuf[6] = sfdsp[dspbuf[6] - 7];
		dspbuf[7] += '0';
		dspbuf[8] += '0';
		dspbuf[9] = ' ';
		dspbuf[10] = ocs;
		dspbuf[11] = '\0';
		break;
	}

	if (v_regs[5] & 0x0180)
		vbank(0);

	vcputsv(instob, 64, idbox[n][4], idbox[n][5], 18 + v , 36, dspbuf, 14);

	return(SUCCESS);
}

/* 
*/

/*
   =============================================================================
	setoscb() -- change oscillator data entry buffer format
   =============================================================================
*/

void setoscb(int16_t n, int16_t v)
{
	register struct instdef *ip;
	register int16_t bfm, ctl, val;
	register int8_t ocs;

	ip = &vbufs[curvce];

	switch (v) {

	case 0:

		ctl = ip->idhos1c;
		val = ip->idhos1v;
		break;

	case 1:

		ctl = ip->idhos2c;
		val = ip->idhos2v;
		break;

	case 2:

		ctl = ip->idhos3c;
		val = ip->idhos3v;
		break;

	case 3:

		ctl = ip->idhos4c;
		val = ip->idhos4v;
		break;
	}

	ocs = ((v EQ 3) ? ' ' : (ctl & OC_SYN ? 'S' : 's'));

	bfm = ctl & OC_MOD;
/* 
*/
	switch (bform) {

	case OC_INT:		/* interval */

		if ((bfm EQ OC_RAT) OR (bfm EQ OC_INT)) {

			sprintf(ebuf, "%04d%c", ((val < 0 ? -val : val) >> 1),
				(val < 0 ? '-' : '+'));

			sprintf(dspbuf, "Int %c%04d %c",
				(val < 0 ? '-' : '+'),
				((val < 0 ? -val : val) >> 1),
				ocs);

		} else {

			strcpy(ebuf, "0000+");
			sprintf(dspbuf, "Int %s %c", intstr, ocs);
		}

		break;

	case OC_RAT:		/* ratio */

		if (bfm EQ OC_RAT) {

			int2rat(val >> 1);

			sprintf(dspbuf, "Rat %c/%c   %c",
				ebuf[0], ebuf[2], ocs);

		} else {

			strcpy(ebuf, ratstr);
			sprintf(dspbuf, "Rat %s   %c", ratstr, ocs);
		}

		break;
/* 
*/
	case OC_FRQ:		/* frequency */

		strcpy(ebuf, frqstr);
		sprintf(dspbuf, "Frq %s  %c", frqstr, ocs);
		break;

	case OC_PCH:		/* pitch */

		ebuf[0] = 0;	/* 0 */
		ebuf[1] = 2;	/* C */
		ebuf[2] = 7;	/*   */
		ebuf[3] = 0;	/* 0 */
		ebuf[4] = 0;	/* 0 */

		sprintf(dspbuf, "Pch %s %c", pchstr, ocs);
		break;
	}

	ebflag = TRUE;

	if (v_regs[5] & 0x0180)
		vbank(0);

	vcputsv(instob, 64, ID_ENTRY, idbox[n][5],
		stcrow, 36, dspbuf, 14);
}

/* 
*/

/*
   =============================================================================
	setosyn() -- set oscillator sync mode
   =============================================================================
*/

void setosyn(int16_t n, int16_t v, int16_t t)
{
	register struct instdef *ip;
	register int8_t *sc;

	ip = &vbufs[curvce];

	if (stcrow EQ 21)
		return;

	sc = t ? "S" : "s";

	switch (v) {

	case 0:

		ip->idhos1c = (ip->idhos1c & ~OC_SYN) | (t ? OC_SYN : 0);
		break;

	case 1:

		ip->idhos2c = (ip->idhos2c & ~OC_SYN) | (t ? OC_SYN : 0);
		break;

	case 2:

		ip->idhos3c = (ip->idhos3c & ~OC_SYN) | (t ? OC_SYN : 0);
		break;

	case 3:

		return;
	}

	dosync(curvce);

	if (v_regs[5] & 0x0180)
		vbank(0);

	vcputsv(instob, 64, idbox[n][4], idbox[n][5], stcrow, stccol, sc, 14);
	modinst();
}

/* 
*/

/*
   =============================================================================
	nd_iosc() -- handle new data entry
   =============================================================================
*/

int16_t nd_iosc(int16_t nn, int16_t k)
{
	register int16_t v, n;

	n = nn & 0xFF;
	v = (nn >> 8) & 3;

	if (stccol LT 39) {		/* mode */

		if (k EQ 8) {		/* - */

			if (--bform LT 0)
				bform = 3;

			setoscb(n, v);
			return(SUCCESS);

		} else if (k EQ 9) {	/* + */

			if (++bform GT 3)
				bform = 0;

			setoscb(n, v);
			return(SUCCESS);

		} else
			return(FAILURE);
/* 
*/
	} else if (stccol EQ 46) {	/* sync */

		if (stcrow EQ 21)
			return(FAILURE);

		if (k EQ 8) {		/* - */

			setosyn(n, v, 0);	/* off */
			return(SUCCESS);

		} else if (k EQ 9) {	/* + */

			setosyn(n, v, 1);	/* on */
			return(SUCCESS);

		} else
			return(FAILURE);

/* 
*/
	} else if ((stccol GE 40) AND (stccol LE 44)) {		/* value */

		switch (bform) {

		case OC_INT:		/* interval */

			if (stccol EQ 40) {	/* sign */

				if (k EQ 8) {		/* - */

					k = '-';
					ebuf[4] = '-';

				} else if (k EQ 9) {	/* + */

					k = '+';
					ebuf[4] = '+';

				} else
					return(FAILURE);

			} else {

				ebuf[stccol - 41] = k + '0';
			}

			dspbuf[0] = (k > 9) ? k : (k + '0');
			dspbuf[1] = '\0';

			if (v_regs[5] & 0x0180)
				vbank(0);

			vcputsv(instob, 64, ID_ENTRY, idbox[n][5],
				stcrow, stccol, dspbuf, 14);

			if (stccol EQ 44)
				return(SUCCESS);

			advicur();
			return(SUCCESS);
/* 
*/
		case OC_RAT:		/* ratio */

			if (stccol EQ 40) {

				if (k) {

					ebuf[0] = dspbuf[0] = k + '0';
					dspbuf[1] = '\0';

					if (v_regs[5] & 0x0180)
						vbank(0);

					vcputsv(instob, 64, ID_ENTRY, idbox[n][5],
						stcrow, stccol, dspbuf, 14);

					advicur();
					advicur();

					return(SUCCESS);

				} else
					return(FAILURE);

			} else if (stccol EQ 42) {

				if (k) {

					ebuf[2] = dspbuf[0] = k + '0';
					dspbuf[1] = '\0';

					if (v_regs[5] & 0x0180)
						vbank(0);

					vcputsv(instob, 64, ID_ENTRY, idbox[n][5],
						stcrow, stccol, dspbuf, 14);

					return(SUCCESS);

				} else
					return(FAILURE);
			} else {

				return(FAILURE);
			}
/* 
*/
		case OC_FRQ:		/* frequency */

			if (stccol EQ 42)
				return(FAILURE);

			ebuf[stccol - 40] = k + '0';
			dspbuf[0] = k + '0';
			dspbuf[1] = '\0';

			if (v_regs[5] & 0x0180)
				vbank(0);

			vcputsv(instob, 64, ID_ENTRY, idbox[n][5],
				stcrow, stccol, dspbuf, 14);

			if (stccol EQ 44)
				return(SUCCESS);

			advicur();

			if (stccol EQ 42)
				advicur();

			return(SUCCESS);
/* 
*/
		case OC_PCH:		/* pitch */

			switch (stccol) {

			case 40:

				ebuf[0] = k;
				dspbuf[0] = k + '0';
				break;

			case 41:

				if (k GT 6)
					return(FAILURE);

				ebuf[1] = k;
				dspbuf[0] = k + 'A';
				break;

			case 42:

				if (k EQ 7) {		/* blank */

					ebuf[2] = k;
					dspbuf[0] = sfdsp[0];
					break;

				} else if (k EQ 8) {	/* flat */

					ebuf[2] = k;
					dspbuf[0] = sfdsp[1];
					break;

				} else if (k EQ 9) {	/* sharp */

					ebuf[2] = k;
					dspbuf[0] = sfdsp[2];
					break;

				} else
					return(FAILURE);
			case 43:
			case 44:

				ebuf[stccol - 40] = k;
				dspbuf[0] = k + '0';
				break;
			}
/* 
*/

			dspbuf[1] = '\0';

			if (v_regs[5] & 0x0180)
				vbank(0);

			vcputsv(instob, 64, ID_ENTRY, idbox[n][5],
				stcrow, stccol, dspbuf, 14);

			if (stccol EQ 44)
				return(SUCCESS);

			advicur();
			return(SUCCESS);
		}

		return(FAILURE);

	} else {

		return(FAILURE);
	}
}