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PARSER.C
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1990-10-04
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32KB
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1,291 lines
/* Parser.c (C) 1990, Mark C. Peterson, CompuServe [70441,3353]
All rights reserved.
Code may be used in any program provided the author is credited
either during program execution or in the documentation. Source
code may be distributed only in combination with public domain or
shareware source code. Source code may be modified provided the
copyright notice and this message is left unchanged and all
modifications are clearly documented.
I would appreciate a copy of any work which incorporates this code,
however this is optional.
Mark C. Peterson
128 Hamden Ave., F
Waterbury, CT 06704
(203) 754-1162
*/
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include "mpmath.h"
void findpath(char *filename, char *fullpathname);
void far *farmemalloc(long bytestoalloc);
void farmemfree(void far *farptr);
int stopmsg(int,unsigned char far *);
MATH_TYPE MathType = D_MATH;
/* moved struct lcomplex and union ARg to mpmath.h -6-20-90 TIW */
struct ConstArg {
char *s;
int len;
union Arg a;
};
struct PEND_OP {
void (far *f)(void);
int p;
};
struct PEND_OP far *o;
union Arg *Arg1, *Arg2, s[20], far *a, far * far *Store, far * far *Load;
int StoPtr, LodPtr, OpPtr;
void (far * far *f)(void) = (void(far * far *)(void))0;
static unsigned n, ErrPtr, posp, vsp, NextOp, LastOp, InitN;
static int paren, SyntaxErr, ExpectingArg;
static struct ConstArg far *v;
static int InitLodPtr, InitStoPtr, InitOpPtr, LastInitOp, NumVar;
static int Delta16;
static double fgLimit;
static double fg;
static int ShiftBack; /* TIW 06-18-90 */
extern int bitshift;
extern int bitshiftless1;
extern long multiply(long x, long y, int bitshift);
extern long divide(long x, long y, int bitshift);
extern int symmetry; /* symmetry flag for calcmand() */
extern double param[];
extern int debugflag; /* BDT for debugging */
extern int row, col, overflow, cpu, fpu;
extern struct complex old, new;
extern double far *dx0, far *dy0;
extern long far *lx0, far *ly0; /* BDT moved these to FAR */
#ifndef TESTING_MATH
extern double far *dx1, far *dy1;
extern long far *lx1, far *ly1;
#define dShiftx dx1[row]
#define dShifty dy1[col]
#define lShiftx lx1[row]
#define lShifty ly1[col]
#else
#define dShiftx 0.0
#define dShifty 0.0
#define lShiftx 0L
#define lShifty 0L
#endif
extern struct lcomplex lold, lnew;
extern char FormName[];
#define LastSqr v[4].a
static char * ErrStrings[] = {
"Should be an Argument",
"Should be an Operator",
"')' needs a matching '('",
"Need more ')'",
"Undefined Operator",
"Undefined Function",
"More than one ','",
};
void dStkAbs(void) {
Arg1->d.x = fabs(Arg1->d.x);
Arg1->d.y = fabs(Arg1->d.y);
}
void mStkAbs(void) {
if(Arg1->m.x.Exp < 0)
Arg1->m.x.Exp = -Arg1->m.x.Exp;
if(Arg1->m.y.Exp < 0)
Arg1->m.y.Exp = -Arg1->m.y.Exp;
}
void lStkAbs(void) {
Arg1->l.x = labs(Arg1->l.x);
Arg1->l.y = labs(Arg1->l.y);
}
void (*StkAbs)(void) = dStkAbs;
void dStkSqr(void) {
LastSqr.d.x = Arg1->d.x * Arg1->d.x;
LastSqr.d.y = Arg1->d.y * Arg1->d.y;
Arg1->d.y = Arg1->d.x * Arg1->d.y * 2.0;
Arg1->d.x = LastSqr.d.x - LastSqr.d.y;
LastSqr.d.x += LastSqr.d.y;
}
void mStkSqr(void) {
LastSqr.m.x = MPmul(Arg1->m.x, Arg1->m.x);
LastSqr.m.y = MPmul(Arg1->m.y, Arg1->m.y);
Arg1->m.y = MPmul(Arg1->m.x, Arg1->m.y);
Arg1->m.y.Exp++;
Arg1->m.x = MPsub(LastSqr.m.x, LastSqr.m.y);
LastSqr.m.x = MPadd(LastSqr.m.x, LastSqr.m.y);
}
void lStkSqr(void) {
LastSqr.l.x = multiply(Arg1->l.x, Arg1->l.x, bitshift);
LastSqr.l.y = multiply(Arg1->l.y, Arg1->l.y, bitshift);
Arg1->l.y = multiply(Arg1->l.x, Arg1->l.y, bitshift) << 1;
Arg1->l.x = LastSqr.l.x - LastSqr.l.y;
LastSqr.l.x += LastSqr.l.y;
}
void (*StkSqr)(void) = dStkSqr;
void dStkAdd(void) {
Arg2->d.x += Arg1->d.x;
Arg2->d.y += Arg1->d.y;
Arg1--;
Arg2--;
}
void mStkAdd(void) {
Arg2->m = MPCadd(Arg2->m, Arg1->m);
Arg1--;
Arg2--;
}
void lStkAdd(void) {
Arg2->l.x += Arg1->l.x;
Arg2->l.y += Arg1->l.y;
Arg1--;
Arg2--;
}
void (*StkAdd)(void) = dStkAdd;
void dStkSub(void) {
Arg2->d.x -= Arg1->d.x;
Arg2->d.y -= Arg1->d.y;
Arg1--;
Arg2--;
}
void mStkSub(void) {
Arg2->m = MPCsub(Arg2->m, Arg1->m);
Arg1--;
Arg2--;
}
void lStkSub(void) {
Arg2->l.x -= Arg1->l.x;
Arg2->l.y -= Arg1->l.y;
Arg1--;
Arg2--;
}
void (*StkSub)(void) = dStkSub;
void dStkConj(void) {
Arg1->d.y = -Arg1->d.y;
}
void mStkConj(void) {
Arg1->m.y.Exp ^= 0x8000;
}
void lStkConj(void) {
Arg1->l.y = -Arg1->l.y;
}
void (*StkConj)(void) = dStkConj;
void dStkReal(void) {
Arg1->d.y = 0.0;
}
void mStkReal(void) {
Arg1->m.y.Mant = (long)(Arg1->m.y.Exp = 0);
}
void lStkReal(void) {
Arg1->l.y = 0l;
}
void (*StkReal)(void) = dStkReal;
void dStkImag(void) {
Arg1->d.x = 0.0;
}
void mStkImag(void) {
Arg1->m.x.Mant = (long)(Arg1->m.x.Exp = 0);
}
void lStkImag(void) {
Arg1->l.x = 0l;
}
void (*StkImag)(void) = dStkImag;
void dStkNeg(void) {
Arg1->d.x = -Arg1->d.x;
Arg1->d.y = -Arg1->d.y;
}
void mStkNeg(void) {
Arg1->m.x.Exp ^= 0x8000;
Arg1->m.y.Exp ^= 0x8000;
}
void lStkNeg(void) {
Arg1->l.x = -Arg1->l.x;
Arg1->l.y = -Arg1->l.y;
}
void (*StkNeg)(void) = dStkNeg;
void dStkMul(void) {
FPUcplxmul(&Arg2->d, &Arg1->d, &Arg2->d);
Arg1--;
Arg2--;
}
void mStkMul(void) {
Arg2->m = MPCmul(Arg2->m, Arg1->m);
Arg1--;
Arg2--;
}
void lStkMul(void) {
long x, y;
x = multiply(Arg2->l.x, Arg1->l.x, bitshift) -
multiply(Arg2->l.y, Arg1->l.y, bitshift);
y = multiply(Arg2->l.y, Arg1->l.x, bitshift) +
multiply(Arg2->l.x, Arg1->l.y, bitshift);
Arg2->l.x = x;
Arg2->l.y = y;
Arg1--;
Arg2--;
}
void (*StkMul)(void) = dStkMul;
void dStkDiv(void) {
FPUcplxdiv(&Arg2->d, &Arg1->d, &Arg2->d);
Arg1--;
Arg2--;
}
void mStkDiv(void) {
Arg2->m = MPCdiv(Arg2->m, Arg1->m);
Arg1--;
Arg2--;
}
void lStkDiv(void) {
long x, y, mod, x2, y2;
mod = multiply(Arg1->l.x, Arg1->l.x, bitshift) +
multiply(Arg1->l.y, Arg1->l.y, bitshift);
x = divide(Arg1->l.x, mod, bitshift);
y = -divide(Arg1->l.y, mod, bitshift);
/* pb 900617 changed next 4 lines to use x2,y2 instead of x,y */
x2 = multiply(Arg2->l.x, x, bitshift) - multiply(Arg2->l.y, y, bitshift);
y2 = multiply(Arg2->l.y, x, bitshift) + multiply(Arg2->l.x, y, bitshift);
Arg2->l.x = x2;
Arg2->l.y = y2;
Arg1--;
Arg2--;
}
void (*StkDiv)(void) = dStkDiv;
void StkSto(void) {
*Store[StoPtr++] = *Arg1;
}
void StkLod(void) {
Arg1++;
Arg2++;
*Arg1 = *Load[LodPtr++];
}
void dStkMod(void) {
Arg1->d.x = (Arg1->d.x * Arg1->d.x) + (Arg1->d.y * Arg1->d.y);
Arg1->d.y = 0.0;
}
void mStkMod(void) {
Arg1->m.x = MPCmod(Arg1->m);
Arg1->m.y.Mant = (long)(Arg1->m.y.Exp = 0);
}
void lStkMod(void) {
Arg1->l.x = multiply(Arg2->l.x, Arg1->l.x, bitshift) +
multiply(Arg2->l.y, Arg1->l.y, bitshift);
if(Arg1->l.x < 0)
overflow = 1;
Arg1->l.y = 0L;
}
void (*StkMod)(void) = dStkMod;
void StkClr(void) {
s[0] = *Arg1;
Arg1 = &s[0];
Arg2 = Arg1;
Arg2--;
}
void dStkSin(void) {
double sinx, cosx, sinhy, coshy;
FPUsincos(&Arg1->d.x, &sinx, &cosx);
FPUsinhcosh(&Arg1->d.y, &sinhy, &coshy);
Arg1->d.x = sinx*coshy;
Arg1->d.y = cosx*sinhy;
}
void mStkSin(void) {
Arg1->d = MPC2cmplx(Arg1->m);
dStkSin();
Arg1->m = cmplx2MPC(Arg1->d);
}
void lStkSin(void) {
int f;
long x, y, sinx, cosx, sinhy, coshy;
x = Arg1->l.x >> Delta16;
y = Arg1->l.y >> Delta16;
SinCos086(x, &sinx, &cosx);
SinhCosh086(y, &sinhy, &coshy);
Arg1->l.x = multiply(sinx, coshy, ShiftBack); /* TIW 06-18-90 */
Arg1-