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- /*---------------------------------------------------------------------------*/
- #include "all.h"
- #include <math.h>
- #include <time.h>
- #include "mygraph.h"
- #include "rgb.h"
- colortyp colvar;
- #define true (!false)
- #define false 0
- char *eval_str();
- int var_getstr(int varnum,char *s);
- int pass_marker(char *s);
- int f_eof(int chn);
- /*---------------------------------------------------------------------------*/
- /* bin = 10..29, binstr = 30..49, fn= 60...139, userfn=200..nnn */
- /* pcode:, 1=exp,len 2=float,val 3=var,long 4,string_var, 5=string,.../0 */
- /*---------------------------------------------------------------------------*/
- /* Input is exp-pcode, output is number or string */
-
- char *binop[] = { "", "+", "-", "*", "/", "^", "=", "<", "<=", ">"
- , ">=", "<>", ".AND.", ".OR." };
-
- struct keyw { char *word; int index; int ret,np,p[5]; } ;
- extern struct keyw keywfn[] ;
-
- double stk[60];
- int stk_var[100];
- char *stk_str[100];
- int stk_strlen[100];
- char sbuf[512];
- char sbuf2[112];
- int nstk=0;
- extern int gle_debug;
- #define dbg if ((gle_debug & 2)>0)
-
- eval(long *pcode,int *cp,double *oval,char *ostr,int *otyp)
- {
- /* a pointer to the pcode to execute */
- /* Current point in this line of pcode */
- /* place to put result number */
- /* place to put result string */
- /* place to put result type, 1=num, 2=str */
- union {double d; long l[1];} both;
- char *ss2,*ss;
- int plen,i,j,l,c,cde;
- time_t today;
- double x1,y1,x2,y2;
- double xx,yy,zz;
- dbg gprint("%%EXP-START, Current point in eval %d %d \n",*cp,(int) *(pcode+(*cp)));
- dbg for (i=0;i<10;i++) gprint("%ld ",*(pcode+i));
- dbg gprint("\n");
- dbg debug_polish(pcode,cp);
- if (*(pcode+(*cp))==8) { /* Single constant */
- both.l[0] = *(pcode+ ++(*cp));
- both.l[1] = 0;
- dbg gprint("Constant %ld \n",both.l[0]);
- memcpy(oval,&both.d,sizeof(both.d));
- memcpy(&both.d,oval,sizeof(both.d));
- ++(*cp);
- return;
- }
-
- if (*(pcode+(*cp)++)!=1) {
- gprint("PCODE, Expecting expression, v=%ld cp=%d \n",*(pcode+(--*(cp))),*cp);
- return;
- }
- plen = *(pcode+*(cp));
- dbg gprint(" plen = %d ",plen);
- if (plen>1000) gprint("Expression is suspiciously long %d \n",plen);
- for (c=(*cp)+1;c<=(plen+ *cp);c++) {
- cde = *(pcode+c);
- dbg gprint(" c=%d ",cde);
- switch (*(pcode+c)) {
- /* Special commands 1..9 ------------------------------- */
- case 1: /* Start of another expression (function param) */
- c++; /* skip over exp length */
- break;
- case 2: /* Floating point number follows */
- *otyp = 1;
- both.l[0] = *(pcode+(++c));
- both.l[1] = *(pcode+(++c));
- stk[++nstk] = both.d;
- dbg gprint("Got float %f %d %f \n",stk[nstk],nstk,*(pcode+(c)));
- break;
- case 3: /* Floating_point variable number follows */
- *otyp = 1;
- var_get(*(pcode+(++c)),&xx);
- dbg gprint("Got variable value %ld %f \n",*(pcode+(c)),xx);
- stk[++nstk] = xx;
- break;
- case 4: /* string variable number follows */
- *otyp = 2;
- var_getstr(*(pcode+(++c)),sbuf); nstk++;
- if (stk_str[nstk]!=NULL) myfree(stk_str[nstk]);
- stk_str[nstk] = sdup(sbuf);
- break;
- case 5: /* Null terminated string follows (long alligned) */
- *otyp = 2;
- c++;nstk++;
- strcpy(sbuf,eval_str(pcode,&c));
- if (stk_str[nstk]!=NULL) myfree(stk_str[nstk]);
- stk_str[nstk] = sdup(sbuf);
- break;
- /* Numeric Binary operators 10..29 ----------------------- */
- case 11: /* + */
- nstk--;
- stk[nstk] = stk[nstk+1] + stk[nstk];
- break;
- case 12: /* - */
- stk[nstk-1] = stk[nstk-1] - stk[nstk];
- nstk--;
- break;
- case 13: /* * */
- stk[nstk-1] = stk[nstk-1] * stk[nstk];
- nstk--;
- break;
- case 14: /* / */
- if (stk[nstk]==0) {
- gprint("Divide by zero %g %g \n",
- stk[nstk-1],stk[nstk]);
- } else {
- stk[nstk-1] = stk[nstk-1] / stk[nstk];
- }
- nstk--;
- break;
- case 15: /* ^ */
- stk[nstk-1] = pow(stk[nstk-1],stk[nstk]);
- nstk--;
- break;
- case 16: /* = */
- nstk--;
- if (stk[nstk] == stk[nstk+1]) stk[nstk]=true;
- else stk[nstk]=false;
- break;
- case 17: /* < */
- nstk--;
- if (stk[nstk] < stk[nstk+1]) stk[nstk]=true;
- else stk[nstk]=false;
- break;
- case 18: /* <= */
- nstk--;
- if (stk[nstk] <= stk[nstk+1]) stk[nstk]=true;
- else stk[nstk]=false;
- break;
- case 19: /* > */
- nstk--;
- if (stk[nstk] > stk[nstk+1]) stk[nstk]=true;
- else stk[nstk]=false;
- break;
- case 20: /* >= */
- nstk--;
- if (stk[nstk] >= stk[nstk+1]) stk[nstk]=true;
- else stk[nstk]=false;
- break;
- case 21: /* <> */
- nstk--;
- if (stk[nstk] != stk[nstk+1]) stk[nstk]=true;
- else stk[nstk]=false;
- break;
- case 22: /* .AND. */
- nstk--;
- if (stk[nstk] && stk[nstk+1]) stk[nstk]=true;
- else stk[nstk]=false;
- break;
- case 23: /* .OR. */
- nstk--;
- if (stk[nstk] || stk[nstk+1]) stk[nstk]=true;
- else stk[nstk]=false;
- break;
- /* String Binary operators 30..49 ----------------------- */
- case 31: /* + */
- *otyp = 2;
- nstk--;
- if (stk_str[nstk]!=NULL) strcpy(sbuf,stk_str[nstk]);
- if (stk_str[nstk+1]!=NULL) strcat(sbuf,stk_str[nstk+1]);
- if (stk_str[nstk] != NULL) myfree(stk_str[nstk]);
- stk_str[nstk] = sdup(sbuf);
- break;
- case 32: /* - */
- break;
- case 33: /* * */
- break;
- case 34: /* / */
- break;
- case 35: /* ^ */
- break;
- case 36: /* = */
- *otyp = 1;
- nstk--;
- if (strcmp(stk_str[nstk],stk_str[nstk+1])==0)
- stk[nstk]=true;
- else
- stk[nstk]=false;
- break;
- case 37: /* < */
- break;
- case 38: /* <= */
- break;
- case 39: /* > */
- break;
- case 40: /* >= */
- break;
- case 41: /* .AND. */
- break;
- case 42: /* .OR. */
- break;
-
- /* Built in functions 60..199 ----------------------------- */
- case 61: /* unary plus */
- break;
- case 62: /* unary minus */
- stk[nstk] = -stk[nstk];
- break;
- case 63: /* abs */
- stk[nstk] = fabs(stk[nstk]);
- break;
- case 64: /* atn */
- stk[nstk] = atan(stk[nstk]);
- break;
- case 113: /* ACOS */
- stk[nstk] = acos(stk[nstk]);
- break;
- case 114: /* ASIN */
- stk[nstk] = asin(stk[nstk]);
- break;
- case 65: /* cos */
- stk[nstk] = cos(stk[nstk]);
- break;
- case 66: /* date$ */
- *otyp = 2;
- time(&today);
- strcpy(sbuf2,ctime(&today));
- strcpy(sbuf,sbuf2);
- strcpy(sbuf+11,sbuf2+20);
- sbuf[strlen(sbuf)-1] = 0;
- setdstr(&stk_str[++nstk],sbuf);
- break;
- case 111: /* device$ */
- *otyp = 2;
- g_get_type(sbuf2);
- setdstr(&stk_str[++nstk],sbuf2);
- break;
- case 115: /* feof(chan) */
- stk[nstk] = f_eof((int) stk[nstk]);
- break;
- case 67: /* exp */
- stk[nstk] = exp(stk[nstk]);
- break;
- case 68: /* fix*/
- stk[nstk] = floor(stk[nstk]);
- break;
- case 69: /* height */
- break;
- case 70: /* long */
- break;
- case 112: /* CHR$() */
- *otyp = 2;
- sprintf(sbuf,"%c",(int) stk[nstk]);
- setdstr(&stk_str[nstk],sbuf);
- break;
- case 71: /* left$ */
- *otyp = 2;
- ncpy(sbuf,stk_str[nstk-1],(int) stk[nstk]);
- setdstr(&stk_str[--nstk],sbuf);
- break;
- case 72: /* len */
- *otyp = 1;
- stk[nstk] = strlen(stk_str[nstk]);
- break;
- case 73: /* log */
- stk[nstk] = log(stk[nstk]);
- break;
- case 74: /* log10 */
- stk[nstk] = log10(stk[nstk]);
- break;
- case 75: /* not */
- break;
- case 76: /* num$ */
- *otyp = 2;
- sprintf(sbuf,"%g ",stk[nstk]);
- if (stk_str[nstk] != NULL) myfree(stk_str[nstk]);
- stk_str[nstk] = sdup(sbuf);
- break;
- case 77: /* num1$ */
- *otyp = 2;
- sprintf(sbuf,"%g",stk[nstk]);
- if (stk_str[nstk] != NULL) myfree(stk_str[nstk]);
- stk_str[nstk] = sdup(sbuf);
- break;
- case 78: /* pageheight */
- break;
- case 79: /* pagewidth */
- break;
- case 80: /* pos */
- *otyp = 1;
- i = stk[nstk];
- if (i<=0) i = 1;
- ss = stk_str[nstk-2];
- ss2 = strstr(ss+i-1,stk_str[nstk-1]);
- if (ss2!=NULL) i = ss2-ss+1;
- else i = 0;
- nstk -= 2;
- stk[nstk] = i;
- break;
- case 81: /* right$ */
- *otyp = 2;
- strcpy(sbuf,stk_str[nstk-1] + (int) stk[nstk] - 1);
- setdstr(&stk_str[--nstk],sbuf);
- break;
- case 82: /* rnd */
- break;
- case 83: /* seg$ */
- *otyp = 2;
- strcpy(sbuf,stk_str[nstk-2] + (int) stk[nstk-1] - 1);
- ncpy(sbuf2,sbuf,(int) stk[nstk] - stk[nstk-1] + 1);
- nstk-=2;
- setdstr(&stk_str[nstk],sbuf2);
- break;
- case 84: /* sgn */
- if (stk[nstk]>=0) stk[nstk] = 1;
- else stk[nstk] = -1;
- break;
- case 85: /* sin */
- stk[nstk] = sin(stk[nstk]);
- break;
- case 86: /* sqr */
- stk[nstk] = stk[nstk] * stk[nstk];
- break;
- case 87: /* sqrt */
- stk[nstk] = sqrt(stk[nstk]);
- break;
- case 88: /* tan */
- stk[nstk] = tan(stk[nstk]);
- break;
- case 89: /* tdepth */
- *otyp = 1;
- g_get_xy(&xx,&yy);
- g_measure(stk_str[nstk],&x1,&x2,&y2,&y1);
- stk[nstk] = y1;
- break;
- case 90: /* theight */
- *otyp = 1;
- g_get_xy(&xx,&yy);
- g_measure(stk_str[nstk],&x1,&x2,&y2,&y1);
- stk[nstk] = y2;
- break;
- case 91: /* time$ */
- *otyp = 2;
- time(&today);
- ncpy(sbuf,ctime(&today)+11,9);
- setdstr(&stk_str[++nstk],sbuf);
- break;
- case 92: /* twidth */
- *otyp = 1;
- g_measure(stk_str[nstk],&x1,&x2,&y1,&y2);
- stk[nstk] = x2-x1;
- break;
- case 93: /* val */
- break;
- case 94: /* width */
- break;
- case 95: /* xend */
- *otyp = 1;
- stk[++nstk] = tex_xend();
- break;
- case 96: /* xgraph */
- *otyp = 1;
- stk[nstk] = graph_xgraph(stk[nstk]);
- break;
- case 97: /* xmax */
- break;
- case 98: /* xmin */
- break;
- case 99: /* xpos */
- *otyp = 1;
- g_get_xy(&xx,&yy);
- stk[++nstk] = xx;
- break;
- case 100: /* yend */
- stk[++nstk] = tex_yend();
- *otyp = 1;
- break;
- case 101: /* ygraph */
- stk[nstk] = graph_ygraph(stk[nstk]);
- *otyp = 1;
- break;
- case 102: /* ymax */
- break;
- case 103: /* ymin */
- break;
- case 104: /* ypos */
- g_get_xy(&xx,&yy);
- *otyp = 1;
- stk[++nstk] = yy;
- break;
- case 105: /* CVTGREY(.5) */
- colvar.b[B_F] = 1;
- colvar.b[B_R] = floor(stk[nstk]*255);
- colvar.b[B_G] = colvar.b[B_R];
- colvar.b[B_B] = colvar.b[B_R];
- both.l[0] = colvar.l;
- both.l[1] = 0;
- memcpy(&stk[nstk],&both.d,sizeof(double));
- break;
- case 106: /* CVTINT(2) */
- *otyp = 1;
- both.l[0] = floor(stk[nstk]);
- both.l[1] = 0;
- memcpy(&stk[nstk],&both.d,sizeof(double));
- break;
- case 108: /* CVTMARKER(m$) */
- *otyp = 1;
- strupr(stk_str[nstk]);
- both.l[0] = pass_marker(stk_str[nstk]);
- both.l[1] = 0;
- memcpy(&stk[nstk],&both.d,sizeof(double));
- break;
- case 110: /* CVTFONT(m$) */
- *otyp = 1;
- strupr(stk_str[nstk]);
- both.l[0] = pass_font(stk_str[nstk]);
- both.l[1] = 0;
- memcpy(&stk[nstk],&both.d,sizeof(double));
- break;
- case 109: /* CVTCOLOR(c$) */
- *otyp = 1;
- strupr(stk_str[nstk]);
- if (strchr(stk_str[nstk],'$')!=NULL) {
- gprint("Error in color name {%s} \n",stk_str[nstk]);
- break;
- }
- both.l[0] = pass_color(stk_str[nstk]);
- both.l[1] = 0;
- memcpy(&stk[nstk],&both.d,sizeof(double));
- break;
- case 107: /* CVTrGB(.4,.4,.2) */
- colvar.b[B_F] = 1;
- colvar.b[B_B] = floor(stk[nstk]*255);
- colvar.b[B_G] = floor(stk[nstk-1]*255);
- colvar.b[B_R] = floor(stk[nstk-2]*255);
- nstk -= 2;
- both.l[0] = colvar.l;
- both.l[1] = 0;
- memcpy(&both.l[0],&colvar.l,sizeof(long));
- memcpy(&stk[nstk],&both.d,sizeof(double));
- break;
- /* User function 200..nnn , or error */
- default:
- /* Is it a user defined function */
- if (*(pcode+c)>200) {
- /* pass the address of some numbers */
- /* pass address of variables if possible*/
- sub_call(*(pcode+c)-200,stk,stk_str,&nstk,otyp);
- }
- else gprint("Unrecognised pcode exp prim %d at position=%d \n",*(pcode+c),c);
- break;
- }
- }
- dbg gprint("RESULT ISa ==== %d [1] %f [nstk] %f \n",nstk,stk[1],stk[nstk]);
- memcpy( oval,&(stk[nstk]),sizeof(double));
- dbg gprint("RESULT ISb ==== %d [1] %f [nstk] %f \n",nstk,stk[1],stk[nstk]);
- dbg gprint("oval %g \n",*oval);
- *ostr = '\0';
- if (*otyp==2) if (stk_str[nstk]!=NULL) strcpy(ostr,stk_str[nstk]);
- if (*otyp==2) dbg gprint("Evaluated string = {%s} \n",ostr);
- nstk--;
- if (nstk<0) {
- gprint("Stack stuffed up in EVAL %d \n",nstk);
- nstk = 0;
- }
- *cp = *cp + plen + 1;
- }
-
- debug_polish(long *pcode,int *zcp)
- {
- long *cp,cpval;
- int plen,i,j,c,cde;
- cpval = *zcp;
- cp = &cpval;
- if (*(pcode+(*cp)++)!=1) {
- gprint("Expecting expression, v=%d \n",(int) *(pcode+--(*cp)) );
- return;
- }
- plen = *(pcode+*(cp));
- gprint("Expression length %d current point %d \n",plen,(int) *cp);
- if (plen>1000) gprint("Expession is suspiciously long %d \n",plen);
- for (c=(*cp)+1;(c-*cp)<=plen;c++) {
- cde = *(pcode+c);
- gprint("Code=%d ",cde);
- if (cde==0) {
- gprint("# ZERO \n");
- } else if (cde==1) {
- gprint("# Expression, length ??? \n");
- c++;
- } else if (cde==2) {
- gprint("# Floating point number %8x \n",*(pcode+(++c)));
- c++; /* because it's a DOUBLE which is a quad word */
- } else if (cde==3) {
- gprint("# Variable \n"); c++;
- } else if (cde==4) {
- gprint("# String Variable \n"); c++;
- } else if (cde==5) {
- c++;
- gprint("# String constant {%s} \n",eval_str(pcode,&c));
- } else if (cde<29) {
- gprint("# Binary operator {%s} \n",binop[cde-10]);
- } else if (cde<49) {
- gprint("# Binary string op {%s} \n",binop[cde-30]);
- } else if (cde<200) {
- gprint("# Built in function (with salt) {%s} \n",keywfn[cde-60].word);
- } else {
- gprint("# User defined function %d \n",cde);
- }
-
- }
- }
-
- char *eval_str(long *pcode,int *plen)
- {
- char *s;
- int sl;
- s = (char *) (pcode+*plen);
- sl = strlen(s)+1;
- sl = ((sl + 3) & 0xfffc);
- *plen = *plen + sl/4 - 1;
- return s;
- }
-
- setdstr(char **s,char *in)
- {
- if (*s != NULL) myfree(*s);
- *s = sdup(in);
- }
-
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