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- /* SC A Spreadsheet Calculator
- * Expression interpreter and assorted support routines.
- *
- * original by James Gosling, September 1982
- * modified by Mark Weiser and Bruce Israel,
- * University of Maryland
- *
- * More mods Robert Bond, 12/86
- * More mods by Alan Silverstein, 3-4/88, see list of changes.
- * $Revision: 6.21 $
- */
-
- #define DEBUGDTS 1 /* REMOVE ME */
-
- #include <sys/types.h>
- #ifdef aiws
- #undef _C_func /* Fixes for undefined symbols on AIX */
- #endif
-
- #ifdef IEEE_MATH
- #include <ieeefp.h>
- #endif /* IEEE_MATH */
-
- #include <math.h>
- #include <signal.h>
- #include <setjmp.h>
- #include <stdio.h>
- #include <ctype.h>
-
- extern int errno; /* set by math functions */
- #ifdef BSD42
- #include <strings.h>
- #include <sys/time.h>
- #ifndef strchr
- #define strchr index
- #endif
- #else
- #include <time.h>
- #ifndef SYSIII
- #include <string.h>
- #endif
- #endif
-
- #include <curses.h>
- #include "sc.h"
-
- #if defined(RE_COMP)
- char *re_comp();
- #endif
- #if defined(REGCMP)
- char *regcmp();
- char *regex();
- #endif
-
- #ifdef SIGVOID
- void doquit();
- #else
- int doquit();
- #endif
-
- /* Use this structure to save the the last 'g' command */
- struct go_save {
- int g_type;
- double g_n;
- char *g_s;
- int g_row;
- int g_col;
- int errsearch;
- } gs;
-
- /* g_type can be: */
- #define G_NONE 0 /* Starting value - must be 0*/
- #define G_NUM 1
- #define G_STR 2
- #define G_CELL 3
-
- #define ISVALID(r,c) ((r)>=0 && (r)<maxrows && (c)>=0 && (c)<maxcols)
-
- extern FILE *popen();
-
- jmp_buf fpe_save;
- int exprerr; /* Set by eval() and seval() if expression errors */
- double prescale = 1.0; /* Prescale for constants in let() */
- int extfunc = 0; /* Enable/disable external functions */
- int loading = 0; /* Set when readfile() is active */
- int gmyrow, gmycol; /* globals used to implement @myrow, @mycol cmds */
-
- /* a linked list of free [struct enodes]'s, uses .e.o.left as the pointer */
- struct enode *freeenodes = NULL;
-
- char *seval();
- double dolookup();
- double eval();
- double fn1_eval();
- double fn1_seval();
- double fn2_eval();
- int RealEvalAll();
- int constant();
- void RealEvalOne();
- void copyrtv();
- void decompile();
- void index_arg();
- void list_arg();
- void one_arg();
- void range_arg();
- void three_arg();
- void two_arg();
- void two_arg_index();
-
- double rint();
- int cellerror = CELLOK; /* is there an error in this cell */
-
- #ifndef PI
- #define PI (double)3.14159265358979323846
- #endif
- #define dtr(x) ((x)*(PI/(double)180.0))
- #define rtd(x) ((x)*(180.0/(double)PI))
-
- double finfunc(fun,v1,v2,v3)
- int fun;
- double v1,v2,v3;
- {
- double answer,p;
-
- p = fn2_eval(pow, 1 + v2, v3);
-
- switch(fun)
- {
- case PV:
- if (v2)
- answer = v1 * (1 - 1/p) / v2;
- else
- { cellerror = CELLERROR;
- answer = (double)0;
- }
- break;
- case FV:
- if (v2)
- answer = v1 * (p - 1) / v2;
- else
- { cellerror = CELLERROR;
- answer = (double)0;
- }
- break;
- case PMT:
- /* CHECK IF ~= 1 - 1/1 */
- if (p && p != (double)1)
- answer = v1 * v2 / (1 - 1/p);
- else
- { cellerror = CELLERROR;
- answer = (double)0;
- }
-
- break;
- default:
- error("Unknown function in finfunc");
- cellerror = CELLERROR;
- return((double)0);
- }
- return(answer);
- }
-
- char *
- dostindex( val, minr, minc, maxr, maxc)
- double val;
- int minr, minc, maxr, maxc;
- {
- register r,c;
- register struct ent *p;
- char *pr;
- int x;
-
- x = (int) val;
- r = minr; c = minc;
- p = (struct ent *)0;
- if ( minr == maxr ) { /* look along the row */
- c = minc + x - 1;
- if (c <= maxc && c >=minc)
- p = *ATBL(tbl, r, c);
- } else if ( minc == maxc ) { /* look down the column */
- r = minr + x - 1;
- if (r <= maxr && r >=minr)
- p = *ATBL(tbl, r, c);
- } else {
- error ("range specified to @stindex");
- cellerror = CELLERROR;
- return((char *)0);
- }
-
- if (p && p->label) {
- pr = scxmalloc((unsigned)(strlen(p->label)+1));
- (void) strcpy(pr, p->label);
- if (p->cellerror)
- cellerror = CELLINVALID;
- return (pr);
- } else
- return((char *)0);
- }
-
- double
- doindex( val, minr, minc, maxr, maxc)
- double val;
- int minr, minc, maxr, maxc;
- {
- double v;
- register r,c;
- register struct ent *p;
- int x;
-
- x = (int) val;
- v = (double)0;
- r = minr; c = minc;
- if ( minr == maxr ) { /* look along the row */
- c = minc + x - 1;
- if (c <= maxc && c >=minc
- && (p = *ATBL(tbl, r, c)) && p->flags&is_valid )
- { if (p->cellerror)
- cellerror = CELLINVALID;
- return p->v;
- }
- }
- else if ( minc == maxc ){ /* look down the column */
- r = minr + x - 1;
- if (r <= maxr && r >=minr
- && (p = *ATBL(tbl, r, c)) && p->flags&is_valid )
- { if (p->cellerror)
- cellerror = CELLINVALID;
- return p->v;
- }
- }
- else {
- error(" range specified to @index");
- cellerror = CELLERROR;
- }
- return v;
- }
-
- double
- dolookup( val, minr, minc, maxr, maxc, offr, offc)
- struct enode * val;
- int minr, minc, maxr, maxc, offr, offc;
- {
- double v, ret = (double)0;
- register r,c;
- register struct ent *p = (struct ent *)0;
- int incr,incc,fndr,fndc;
- char *s;
-
- incr = (offc != 0); incc = (offr != 0);
- if (etype(val) == NUM) {
- cellerror = CELLOK;
- v = eval(val);
- for (r = minr, c = minc; r <= maxr && c <= maxc; r+=incr, c+=incc) {
- if ( (p = *ATBL(tbl, r, c)) && p->flags&is_valid ) {
- if (p->v <= v) {
- fndr = incc ? (minr + offr) : r;
- fndc = incr ? (minc + offc) : c;
- if (ISVALID(fndr,fndc))
- p = *ATBL(tbl, fndr, fndc);
- else {
- error(" range specified to @[hv]lookup");
- cellerror = CELLERROR;
- }
- if ( p && p->flags&is_valid)
- { if (p->cellerror)
- cellerror = CELLINVALID;
- ret = p->v;
- }
- } else break;
- }
- }
- } else {
- cellerror = CELLOK;
- s = seval(val);
- for (r = minr, c = minc; r <= maxr && c <= maxc; r+=incr, c+=incc) {
- if ( (p = *ATBL(tbl, r, c)) && p->label ) {
- if (strcmp(p->label,s) == 0) {
- fndr = incc ? (minr + offr) : r;
- fndc = incr ? (minc + offc) : c;
- if (ISVALID(fndr,fndc))
- { p = *ATBL(tbl, fndr, fndc);
- if (p->cellerror)
- cellerror = CELLINVALID;
- }
- else {
- error(" range specified to @[hv]lookup");
- cellerror = CELLERROR;
- }
- break;
- }
- }
- }
- if ( p && p->flags&is_valid)
- ret = p->v;
- scxfree(s);
- }
- return ret;
- }
-
- double
- docount(minr, minc, maxr, maxc)
- int minr, minc, maxr, maxc;
- {
- int v;
- register r,c;
- register struct ent *p;
-
- v = 0;
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++)
- if ((p = *ATBL(tbl, r, c)) && p->flags&is_valid)
- { if (p->cellerror)
- cellerror = CELLINVALID;
- v++;
- }
- return v;
- }
-
- double
- dosum(minr, minc, maxr, maxc)
- int minr, minc, maxr, maxc;
- {
- double v;
- register r,c;
- register struct ent *p;
-
- v = (double)0;
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++)
- if ((p = *ATBL(tbl, r, c)) && p->flags&is_valid)
- { if (p->cellerror)
- cellerror = CELLINVALID;
- v += p->v;
- }
- return v;
- }
-
- double
- doprod(minr, minc, maxr, maxc)
- int minr, minc, maxr, maxc;
- {
- double v;
- register r,c;
- register struct ent *p;
-
- v = 1;
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++)
- if ((p = *ATBL(tbl, r, c)) && p->flags&is_valid)
- { if (p->cellerror)
- cellerror = CELLINVALID;
- v *= p->v;
- }
- return v;
- }
-
- double
- doavg(minr, minc, maxr, maxc)
- int minr, minc, maxr, maxc;
- {
- double v;
- register r,c,count;
- register struct ent *p;
-
- v = (double)0;
- count = 0;
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++)
- if ((p = *ATBL(tbl, r, c)) && p->flags&is_valid) {
- if (p->cellerror)
- cellerror = CELLINVALID;
-
- v += p->v;
- count++;
- }
-
- if (count == 0)
- return ((double) 0);
-
- return (v / (double)count);
- }
-
- double
- dostddev(minr, minc, maxr, maxc)
- int minr, minc, maxr, maxc;
- {
- double lp, rp, v, nd;
- register r,c,n;
- register struct ent *p;
-
- n = 0;
- lp = 0;
- rp = 0;
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++)
- if ((p = *ATBL(tbl, r, c)) && p->flags&is_valid) {
- if (p->cellerror)
- cellerror = CELLINVALID;
-
- v = p->v;
- lp += v*v;
- rp += v;
- n++;
- }
-
- if ((n == 0) || (n == 1))
- return ((double) 0);
- nd = (double)n;
- return (sqrt((nd*lp-rp*rp)/(nd*(nd-1))));
- }
-
- double
- domax(minr, minc, maxr, maxc)
- int minr, minc, maxr, maxc;
- {
- double v = (double)0;
- register r,c,count;
- register struct ent *p;
-
- count = 0;
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++)
- if ((p = *ATBL(tbl, r, c)) && p->flags&is_valid) {
- if (p->cellerror)
- cellerror = CELLINVALID;
-
- if (!count) {
- v = p->v;
- count++;
- } else if (p->v > v)
- v = p->v;
- }
-
- if (count == 0)
- return ((double) 0);
-
- return (v);
- }
-
- double
- domin(minr, minc, maxr, maxc)
- int minr, minc, maxr, maxc;
- {
- double v = (double)0;
- register r,c,count;
- register struct ent *p;
-
- count = 0;
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++)
- if ((p = *ATBL(tbl, r, c)) && p->flags&is_valid) {
- if (p->cellerror)
- cellerror = CELLINVALID;
-
- if (!count) {
- v = p->v;
- count++;
- } else if (p->v < v)
- v = p->v;
- }
-
- if (count == 0)
- return ((double) 0);
-
- return (v);
- }
-
- #define sec_min 60
- #define sec_hr 3600L
- #define sec_day 86400L
- #define sec_yr 31471200L /* 364.25 days/yr */
- #define sec_mo 2622600L /* sec_yr/12: sort of an average */
- int mdays[12]={ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
-
- double
- dodts(mo, day, yr)
- int mo, day, yr;
- {
- long trial;
- register struct tm *tp;
- register int i;
- register long jdate;
-
- mdays[1] = 28 + (yr%4 == 0);
-
- if (mo < 1 || mo > 12 || day < 1 || day > mdays[--mo] ||
- yr > 1999 || yr < 1970) {
- error("@dts: invalid argument");
- cellerror = CELLERROR;
- return(0.0);
- }
-
- jdate = day-1;
- for (i=0; i<mo; i++)
- jdate += mdays[i];
- for (i = 1970; i < yr; i++)
- jdate += 365 + (i%4 == 0);
-
- trial = jdate * sec_day;
-
- yr -= 1900;
-
- tp = localtime(&trial);
-
- if (tp->tm_year != yr) {
- /*
- * We may fail this test once a year because of time zone
- * and daylight savings time errors. This bounces the
- * trial time past the boundary. The error introduced is
- * corrected below.
- */
- trial += sec_day*(yr - tp->tm_year);
- tp = localtime(&trial);
- }
- if (tp->tm_mon != mo) {
- /* We may fail this test once a month. */
- trial += sec_day*(mo - tp->tm_mon);
- tp = localtime(&trial);
- }
- if (tp->tm_mday + tp->tm_hour + tp->tm_min + tp->tm_sec != day) {
- trial -= (tp->tm_mday - day)*sec_day + tp->tm_hour*sec_hr
- + tp->tm_min*sec_min + tp->tm_sec;
- }
-
- #ifdef DEBUGDTS
- tp = localtime(&trial);
- if (tp->tm_mday + tp->tm_hour + tp->tm_min + tp->tm_sec +
- tp->tm_year + tp->tm_mon != yr+mo+day)
- { error("Dts broke down");
- cellerror = CELLERROR;
- }
- #endif
-
- return ((double)trial);
- }
-
- double
- dotts(hr, min, sec)
- int hr, min, sec;
- {
- if (hr < 0 || hr > 23 || min < 0 || min > 59 || sec < 0 || sec > 59) {
- error ("@tts: Invalid argument");
- cellerror = CELLERROR;
- return ((double)0);
- }
- return ((double)(sec+min*60+hr*3600));
- }
-
- double
- dotime(which, when)
- int which;
- double when;
- {
- long time();
-
- static long t_cache;
- static struct tm tm_cache;
- struct tm *tp;
- long tloc;
-
- if (which == NOW)
- return (double)time((long *)0);
-
- tloc = (long)when;
-
- if (tloc != t_cache) {
- tp = localtime(&tloc);
- tm_cache = *tp;
- tm_cache.tm_mon += 1;
- tm_cache.tm_year += 1900;
- t_cache = tloc;
- }
-
- switch (which) {
- case HOUR: return((double)(tm_cache.tm_hour));
- case MINUTE: return((double)(tm_cache.tm_min));
- case SECOND: return((double)(tm_cache.tm_sec));
- case MONTH: return((double)(tm_cache.tm_mon));
- case DAY: return((double)(tm_cache.tm_mday));
- case YEAR: return((double)(tm_cache.tm_year));
- }
- /* Safety net */
- cellerror = CELLERROR;
- return ((double)0);
- }
-
- double
- doston(s)
- char *s;
- {
- #ifndef _AIX
- char *strtof();
- #endif
- double v;
-
- if (!s)
- return((double)0);
-
- (void)strtof(s, &v);
- scxfree(s);
- return(v);
- }
-
- double
- doeqs(s1, s2)
- char *s1, *s2;
- {
- double v;
-
- if (!s1 && !s2)
- return((double)1.0);
-
- if (!s1 || !s2)
- v = 0.0;
- else if (strcmp(s1, s2) == 0)
- v = 1.0;
- else
- v = 0.0;
-
- if (s1)
- scxfree(s1);
-
- if (s2)
- scxfree(s2);
-
- return(v);
- }
-
-
- /*
- * Given a string representing a column name and a value which is a column
- * number, return a pointer to the selected cell's entry, if any, else NULL.
- * Use only the integer part of the column number. Always free the string.
- */
-
- struct ent *
- getent (colstr, rowdoub)
- char *colstr;
- double rowdoub;
- {
- int collen; /* length of string */
- int row, col; /* integer values */
- struct ent *p = (struct ent *)0; /* selected entry */
-
- if (!colstr)
- { cellerror = CELLERROR;
- return((struct ent *)0);
- }
-
- if (((row = (int) floor (rowdoub)) >= 0)
- && (row < maxrows) /* in range */
- && ((collen = strlen (colstr)) <= 2) /* not too long */
- && ((col = atocol (colstr, collen)) >= 0)
- && (col < maxcols)) /* in range */
- {
- p = *ATBL(tbl, row, col);
- if ((p != NULL) && p->cellerror)
- cellerror = CELLINVALID;
- }
- scxfree (colstr);
- return (p);
- }
-
-
- /*
- * Given a string representing a column name and a value which is a column
- * number, return the selected cell's numeric value, if any.
- */
-
- double
- donval (colstr, rowdoub)
- char *colstr;
- double rowdoub;
- {
- struct ent *ep;
-
- return (((ep = getent (colstr, rowdoub)) && ((ep -> flags) & is_valid)) ?
- (ep -> v) : (double)0);
- }
-
-
- /*
- * The list routines (e.g. dolmax) are called with an LMAX enode.
- * The left pointer is a chain of ELIST nodes, the right pointer
- * is a value.
- */
- double
- dolmax(ep)
- struct enode *ep;
- {
- register int count = 0;
- register double maxval = 0; /* Assignment to shut up lint */
- register struct enode *p;
- register double v;
-
- cellerror = CELLOK;
- for (p = ep; p; p = p->e.o.left) {
- v = eval(p->e.o.right);
- if (!count || v > maxval) {
- maxval = v; count++;
- }
- }
- if (count) return maxval;
- else return (double)0;
- }
-
- double
- dolmin(ep)
- struct enode *ep;
- {
- register int count = 0;
- register double minval = 0; /* Assignment to shut up lint */
- register struct enode *p;
- register double v;
-
- cellerror = CELLOK;
- for (p = ep; p; p = p->e.o.left) {
- v = eval(p->e.o.right);
- if (!count || v < minval) {
- minval = v; count++;
- }
- }
- if (count) return minval;
- else return (double)0;
- }
-
- double
- eval(e)
- register struct enode *e;
- {
- if (e == (struct enode *)0)
- { cellerror = CELLINVALID;
- return (double)0;
- }
- switch (e->op) {
- case '+': return (eval(e->e.o.left) + eval(e->e.o.right));
- case '-': return (eval(e->e.o.left) - eval(e->e.o.right));
- case '*': return (eval(e->e.o.left) * eval(e->e.o.right));
- case '/': { double num, denom;
- num = eval(e->e.o.left);
- denom = eval(e->e.o.right);
- if (denom)
- /* if (1) /* to test num div 0 */
- return(num/denom);
- else
- { cellerror = CELLERROR;
- return((double) 0);
- }
- }
- case '%': { double num, denom;
- num = floor(eval(e->e.o.left));
- denom = floor(eval (e->e.o.right));
- if (denom)
- return(num - floor(num/denom)*denom);
- else
- { cellerror = CELLERROR;
- return((double) 0);
- }
- }
- case '^': return (fn2_eval(pow,eval(e->e.o.left),eval(e->e.o.right)));
- case '<': return (eval(e->e.o.left) < eval(e->e.o.right));
- case '=': return (eval(e->e.o.left) == eval(e->e.o.right));
- case '>': return (eval(e->e.o.left) > eval(e->e.o.right));
- case '&': return (eval(e->e.o.left) && eval(e->e.o.right));
- case '|': return (eval(e->e.o.left) || eval(e->e.o.right));
- case IF:
- case '?': return eval(e->e.o.left) ? eval(e->e.o.right->e.o.left)
- : eval(e->e.o.right->e.o.right);
- case 'm': return (-eval(e->e.o.right));
- case 'f': return (eval(e->e.o.right));
- case '~': return (eval(e->e.o.right) == 0.0);
- case O_CONST: return (e->e.k);
- case O_VAR: if (e->e.v.vp->cellerror)
- cellerror = CELLINVALID;
- return (e->e.v.vp->v);
- case INDEX:
- case LOOKUP:
- case HLOOKUP:
- case VLOOKUP:
- { register r,c;
- register maxr, maxc;
- register minr, minc;
- maxr = e->e.o.right->e.r.right.vp -> row;
- maxc = e->e.o.right->e.r.right.vp -> col;
- minr = e->e.o.right->e.r.left.vp -> row;
- minc = e->e.o.right->e.r.left.vp -> col;
- if (minr>maxr) r = maxr, maxr = minr, minr = r;
- if (minc>maxc) c = maxc, maxc = minc, minc = c;
- switch(e->op){
- case LOOKUP:
- return dolookup(e->e.o.left, minr, minc, maxr, maxc,
- minr==maxr, minc==maxc);
- case HLOOKUP:
- return dolookup(e->e.o.left->e.o.left, minr,minc,maxr,maxc,
- (int) eval(e->e.o.left->e.o.right), 0);
- case VLOOKUP:
- return dolookup(e->e.o.left->e.o.left, minr,minc,maxr,maxc,
- 0, (int) eval(e->e.o.left->e.o.right));
- case INDEX:
- return doindex(eval(e->e.o.left), minr, minc, maxr, maxc);
- }
- }
- case REDUCE | '+':
- case REDUCE | '*':
- case REDUCE | 'a':
- case REDUCE | 'c':
- case REDUCE | 's':
- case REDUCE | MAX:
- case REDUCE | MIN:
- { register r,c;
- register maxr, maxc;
- register minr, minc;
- maxr = e->e.r.right.vp -> row;
- maxc = e->e.r.right.vp -> col;
- minr = e->e.r.left.vp -> row;
- minc = e->e.r.left.vp -> col;
- if (minr>maxr) r = maxr, maxr = minr, minr = r;
- if (minc>maxc) c = maxc, maxc = minc, minc = c;
- switch (e->op) {
- case REDUCE | '+': return dosum(minr, minc, maxr, maxc);
- case REDUCE | '*': return doprod(minr, minc, maxr, maxc);
- case REDUCE | 'a': return doavg(minr, minc, maxr, maxc);
- case REDUCE | 'c': return docount(minr, minc, maxr, maxc);
- case REDUCE | 's': return dostddev(minr, minc, maxr, maxc);
- case REDUCE | MAX: return domax(minr, minc, maxr, maxc);
- case REDUCE | MIN: return domin(minr, minc, maxr, maxc);
- }
- }
- case ABS: return (fn1_eval( fabs, eval(e->e.o.right)));
- case ACOS: return (fn1_eval( acos, eval(e->e.o.right)));
- case ASIN: return (fn1_eval( asin, eval(e->e.o.right)));
- case ATAN: return (fn1_eval( atan, eval(e->e.o.right)));
- case ATAN2: return (fn2_eval( atan2, eval(e->e.o.left), eval(e->e.o.right)));
- case CEIL: return (fn1_eval( ceil, eval(e->e.o.right)));
- case COS: return (fn1_eval( cos, eval(e->e.o.right)));
- case EXP: return (fn1_eval( exp, eval(e->e.o.right)));
- case FABS: return (fn1_eval( fabs, eval(e->e.o.right)));
- case FLOOR: return (fn1_eval( floor, eval(e->e.o.right)));
- case HYPOT: return (fn2_eval( hypot, eval(e->e.o.left), eval(e->e.o.right)));
- case LOG: return (fn1_eval( log, eval(e->e.o.right)));
- case LOG10: return (fn1_eval( log10, eval(e->e.o.right)));
- case POW: return (fn2_eval( pow, eval(e->e.o.left), eval(e->e.o.right)));
- case SIN: return (fn1_eval( sin, eval(e->e.o.right)));
- case SQRT: return (fn1_eval( sqrt, eval(e->e.o.right)));
- case TAN: return (fn1_eval( tan, eval(e->e.o.right)));
- case DTR: return (dtr(eval(e->e.o.right)));
- case RTD: return (rtd(eval(e->e.o.right)));
- case RND:
- if (rndinfinity)
- { double temp = eval(e->e.o.right);
- return(temp-floor(temp) < 0.5 ?
- floor(temp) : ceil(temp));
- }
- else
- return rint(eval(e->e.o.right));
- case ROUND:
- { int prec = (int) eval(e->e.o.right);
- double scal = 1;
- if (0 < prec)
- do scal *= 10; while (0 < --prec);
- else if (prec < 0)
- do scal /= 10; while (++prec < 0);
-
- if (rndinfinity)
- { double temp = eval(e->e.o.left);
- temp *= scal;
- temp = ((temp-floor(temp)) < 0.5 ?
- floor(temp) : ceil(temp));
- return(temp / scal);
- }
- else
- return(rint(eval(e->e.o.left) * scal) / scal);
- }
- case FV:
- case PV:
- case PMT: return(finfunc(e->op,eval(e->e.o.left),
- eval(e->e.o.right->e.o.left),
- eval(e->e.o.right->e.o.right)));
- case HOUR: return (dotime(HOUR, eval(e->e.o.right)));
- case MINUTE: return (dotime(MINUTE, eval(e->e.o.right)));
- case SECOND: return (dotime(SECOND, eval(e->e.o.right)));
- case MONTH: return (dotime(MONTH, eval(e->e.o.right)));
- case DAY: return (dotime(DAY, eval(e->e.o.right)));
- case YEAR: return (dotime(YEAR, eval(e->e.o.right)));
- case NOW: return (dotime(NOW, (double)0.0));
- case DTS: return (dodts((int)eval(e->e.o.left),
- (int)eval(e->e.o.right->e.o.left),
- (int)eval(e->e.o.right->e.o.right)));
- case TTS: return (dotts((int)eval(e->e.o.left),
- (int)eval(e->e.o.right->e.o.left),
- (int)eval(e->e.o.right->e.o.right)));
- case STON: return (doston(seval(e->e.o.right)));
- case EQS: return (doeqs(seval(e->e.o.right),seval(e->e.o.left)));
- case LMAX: return dolmax(e);
- case LMIN: return dolmin(e);
- case NVAL: return (donval(seval(e->e.o.left),eval(e->e.o.right)));
- case MYROW: return ((double) gmyrow);
- case MYCOL: return ((double) gmycol);
- case NUMITER: return ((double) repct);
- default: error ("Illegal numeric expression");
- exprerr = 1;
- }
- cellerror = CELLERROR;
- return((double)0.0);
- }
-
- #ifdef SIGVOID
- void
- #else
- int
- #endif
- eval_fpe() /* Trap for FPE errors in eval */
- {
- #if defined(i386) && !defined(M_XENIX)
- asm(" fnclex");
- asm(" fwait");
- #else
- #ifdef IEEE_MATH
- (void)fpsetsticky((fp_except)0); /* Clear exception */
- #endif /* IEEE_MATH */
- #ifdef PC
- _fpreset();
- #endif
- #endif
- /* re-establish signal handler for next time */
- (void) signal(SIGFPE, eval_fpe);
- longjmp(fpe_save, 1);
- }
-
- double fn1_eval(fn, arg)
- double (*fn)();
- double arg;
- {
- double res;
- errno = 0;
- res = (*fn)(arg);
- if(errno)
- cellerror = CELLERROR;
-
- return res;
- }
-
- double fn2_eval(fn, arg1, arg2)
- double (*fn)();
- double arg1, arg2;
- {
- double res;
- errno = 0;
- res = (*fn)(arg1, arg2);
- if(errno)
- cellerror = CELLERROR;
-
- return res;
- }
-
- /*
- * Rules for string functions:
- * Take string arguments which they scxfree.
- * All returned strings are assumed to be xalloced.
- */
-
- char *
- docat(s1, s2)
- register char *s1, *s2;
- {
- register char *p;
- char *arg1, *arg2;
-
- if (!s1 && !s2)
- return((char *)0);
- arg1 = s1 ? s1 : "";
- arg2 = s2 ? s2 : "";
- p = scxmalloc((unsigned)(strlen(arg1)+strlen(arg2)+1));
- (void) strcpy(p, arg1);
- (void) strcat(p, arg2);
- if (s1)
- scxfree(s1);
- if (s2)
- scxfree(s2);
- return(p);
- }
-
- char *
- dodate(tloc)
- long tloc;
- {
- char *tp;
- char *p;
-
- tp = ctime(&tloc);
- tp[24] = '\0';
- p = scxmalloc((unsigned)25);
- (void) strcpy(p, tp);
- return(p);
- }
-
-
- char *
- dofmt(fmtstr, v)
- char *fmtstr;
- double v;
- {
- char buff[FBUFLEN];
- char *p;
-
- if (!fmtstr)
- return((char *)0);
- (void) sprintf(buff, fmtstr, v);
- p = scxmalloc((unsigned)(strlen(buff)+1));
- (void) strcpy(p, buff);
- scxfree(fmtstr);
- return(p);
- }
-
-
- /*
- * Given a command name and a value, run the command with the given value and
- * read and return its first output line (only) as an allocated string, always
- * a copy of prevstr, which is set appropriately first unless external
- * functions are disabled, in which case the previous value is used. The
- * handling of prevstr and freeing of command is tricky. Returning an
- * allocated string in all cases, even if null, insures cell expressions are
- * written to files, etc.
- */
-
- #if defined(VMS) || defined(MSDOS)
- char *
- doext(command, value)
- char *command;
- double value;
- {
- error("Warning: External functions unavailable on VMS");
- cellerror = CELLERROR; /* not sure if this should be a cellerror */
- if (command)
- scxfree(command);
- return (strcpy (scxmalloc((unsigned) 1), "\0"));
- }
-
- #else /* VMS */
-
- char *
- doext (command, value)
- char *command;
- double value;
- {
- static char *prevstr = (char *)0; /* previous result */
- static unsigned prevlen = 0;
- char buff[FBUFLEN]; /* command line/return, not permanently alloc */
- extern char *strchr();
-
- if (!extfunc) {
- error ("Warning: external functions disabled; using %s value",
- ((prevstr == NULL) || (*prevstr == '\0')) ?
- "null" : "previous");
-
- if (command) scxfree (command);
- } else {
- if ((! command) || (! *command)) {
- error ("Warning: external function given null command name");
- cellerror = CELLERROR;
- if (command) scxfree (command);
- } else {
- FILE *pp;
-
- (void) sprintf (buff, "%s %g", command, value); /* build cmd line */
- scxfree (command);
-
- error ("Running external function...");
- (void) refresh();
-
- if ((pp = popen (buff, "r")) == (FILE *) NULL) { /* run it */
- error ("Warning: running \"%s\" failed", buff);
- cellerror = CELLERROR;
- }
- else {
- if (fgets (buff, sizeof(buff)-1, pp) == NULL) /* one line */
- error ("Warning: external function returned nothing");
- else {
- char *cp;
-
- error (""); /* erase notice */
- buff[sizeof(buff)-1] = '\0';
-
- if (cp = strchr (buff, '\n')) /* contains newline */
- *cp = '\0'; /* end string there */
-
- if (strlen(buff) + 1 > prevlen)
- { prevlen = strlen(buff) + 40;
- prevstr = scxrealloc(prevstr, prevlen);
- }
- (void) strcpy (prevstr, buff);
- /* save alloc'd copy */
- }
- (void) pclose (pp);
-
- } /* else */
- } /* else */
- } /* else */
- if (prevstr)
- return (strcpy (scxmalloc ((unsigned) (strlen (prevstr) + 1)), prevstr));
- else
- return (strcpy(scxmalloc((unsigned)1), ""));
- }
-
- #endif /* VMS */
-
-
- /*
- * Given a string representing a column name and a value which is a column
- * number, return the selected cell's string value, if any. Even if none,
- * still allocate and return a null string so the cell has a label value so
- * the expression is saved in a file, etc.
- */
-
- char *
- dosval (colstr, rowdoub)
- char *colstr;
- double rowdoub;
- {
- struct ent *ep;
- char *llabel;
-
- llabel = (ep = getent (colstr, rowdoub)) ? (ep -> label) : "";
- return (strcpy (scxmalloc ((unsigned) (strlen (llabel) + 1)), llabel));
- }
-
-
- /*
- * Substring: Note that v1 and v2 are one-based to users, but zero-based
- * when calling this routine.
- */
-
- char *
- dosubstr(s, v1, v2)
- char *s;
- register int v1,v2;
- {
- register char *s1, *s2;
- char *p;
-
- if (!s)
- return((char *)0);
-
- if (v2 >= strlen (s)) /* past end */
- v2 = strlen (s) - 1; /* to end */
-
- if (v1 < 0 || v1 > v2) { /* out of range, return null string */
- scxfree(s);
- p = scxmalloc((unsigned)1);
- p[0] = '\0';
- return(p);
- }
- s2 = p = scxmalloc((unsigned)(v2-v1+2));
- s1 = &s[v1];
- for(; v1 <= v2; s1++, s2++, v1++)
- *s2 = *s1;
- *s2 = '\0';
- scxfree(s);
- return(p);
- }
-
- /*
- * character casing: make upper case, make lower case
- */
-
- char *
- docase( acase, s)
- int acase;
- char *s;
- {
- char *p = s;
-
- if (s == NULL)
- return(NULL);
-
- if( acase == UPPER ) {
- while( *p != '\0' ) {
- if( islower(*p) )
- *p = toupper(*p);
- p++;
- }
- }
- else if ( acase == LOWER ) {
- while( *p != '\0' ) {
- if (isupper(*p))
- *p = tolower(*p);
- p++;
- }
- }
- return (s);
- }
-
- /*
- * make proper capitals of every word in a string
- * if the string has mixed case we say the string is lower
- * and we will upcase only first letters of words
- * if the string is all upper we will lower rest of words.
- */
-
- char *
- docapital( s )
- char *s;
- {
- char *p;
- int skip = 1;
- int AllUpper = 1;
-
- if (s == NULL)
- return(NULL);
- for( p = s; *p != '\0' && AllUpper != 0; p++ )
- if( isalpha(*p) && islower(*p) ) AllUpper = 0;
- for (p = s; *p != '\0'; p++) {
- if (!isalnum(*p))
- skip = 1;
- else
- if (skip == 1) {
- skip = 0;
- if (islower(*p))
- *p = toupper(*p);
- }
- else /* if the string was all upper before */
- if (isupper(*p) && AllUpper != 0)
- *p = tolower(*p);
- }
- return(s);
- }
-
- char *
- seval(se)
- register struct enode *se;
- {
- register char *p;
-
- if (se == (struct enode *)0) return (char *)0;
- switch (se->op) {
- case O_SCONST: p = scxmalloc((unsigned)(strlen(se->e.s)+1));
- (void) strcpy(p, se->e.s);
- return(p);
- case O_VAR: {
- struct ent *ep;
- ep = se->e.v.vp;
-
- if (!ep->label)
- return((char *)0);
- p = scxmalloc((unsigned)(strlen(ep->label)+1));
- (void) strcpy(p, ep->label);
- return(p);
- }
- case '#': return(docat(seval(se->e.o.left), seval(se->e.o.right)));
- case 'f': return(seval(se->e.o.right));
- case IF:
- case '?': return(eval(se->e.o.left) ? seval(se->e.o.right->e.o.left)
- : seval(se->e.o.right->e.o.right));
- case DATE: return(dodate((long)(eval(se->e.o.right))));
- case FMT: return(dofmt(seval(se->e.o.left), eval(se->e.o.right)));
- case UPPER: return(docase(UPPER, seval(se->e.o.right)));
- case LOWER: return(docase(LOWER, seval(se->e.o.right)));
- case CAPITAL:return(docapital(seval(se->e.o.right)));
- case STINDEX:
- { register r,c;
- register maxr, maxc;
- register minr, minc;
- maxr = se->e.o.right->e.r.right.vp -> row;
- maxc = se->e.o.right->e.r.right.vp -> col;
- minr = se->e.o.right->e.r.left.vp -> row;
- minc = se->e.o.right->e.r.left.vp -> col;
- if (minr>maxr) r = maxr, maxr = minr, minr = r;
- if (minc>maxc) c = maxc, maxc = minc, minc = c;
- return dostindex(eval(se->e.o.left), minr, minc, maxr, maxc);
- }
- case EXT: return(doext(seval(se->e.o.left), eval(se->e.o.right)));
- case SVAL: return(dosval(seval(se->e.o.left), eval(se->e.o.right)));
- case SUBSTR: return(dosubstr(seval(se->e.o.left),
- (int)eval(se->e.o.right->e.o.left) - 1,
- (int)eval(se->e.o.right->e.o.right) - 1));
- case COLTOA: return(strcpy(scxmalloc((unsigned)10),
- coltoa((int)eval(se->e.o.right)+1)));
- default:
- error ("Illegal string expression");
- exprerr = 1;
- return(NULL);
- }
- }
-
- /*
- * The graph formed by cell expressions which use other cells's values is not
- * evaluated "bottom up". The whole table is merely re-evaluated cell by cell,
- * top to bottom, left to right, in RealEvalAll(). Each cell's expression uses
- * constants in other cells. However, RealEvalAll() notices when a cell gets a
- * new numeric or string value, and reports if this happens for any cell.
- * EvalAll() repeats calling RealEvalAll() until there are no changes or the
- * evaluation count expires.
- */
-
- int propagation = 10; /* max number of times to try calculation */
- int repct = 1; /* Make repct a global variable so that the
- function @numiter can access it */
-
- void
- setiterations(i)
- int i;
- {
- if(i<1) {
- error("iteration count must be at least 1");
- propagation = 1;
- }
- else propagation = i;
- }
-
- void
- EvalAll () {
- int lastcnt;
-
- repct = 1;
- (void) signal(SIGFPE, eval_fpe);
-
- while ((lastcnt = RealEvalAll()) && (++repct <= propagation));
- if((propagation>1)&& (lastcnt >0 ))
- error("Still changing after %d iterations",propagation-1);
-
- (void) signal(SIGFPE, doquit);
- }
-
- /*
- * Evaluate all cells which have expressions and alter their numeric or string
- * values. Return the number of cells which changed.
- */
-
- int
- RealEvalAll () {
- register int i,j;
- int chgct = 0;
- register struct ent *p;
-
- if(calc_order == BYROWS ) {
- for (i=0; i<=maxrow; i++)
- for (j=0; j<=maxcol; j++)
- if ((p = *ATBL(tbl,i,j)) && !(p->flags&is_locked) && p->expr) RealEvalOne(p,i,j,&chgct);
- }
- else if ( calc_order == BYCOLS ) {
- for (j=0; j<=maxcol; j++)
- { for (i=0; i<=maxrow; i++)
- if ((p = *ATBL(tbl,i,j)) && !(p->flags&is_locked) && p->expr) RealEvalOne(p,i,j,&chgct);
- }
- }
- else error("Internal error calc_order");
-
- return(chgct);
- }
-
- void
- RealEvalOne(p, i, j, chgct)
- register struct ent *p;
- int i, j, *chgct;
- {
- if (p->flags & is_strexpr) {
- char *v;
- if (setjmp(fpe_save)) {
- error("Floating point exception %s", v_name(i, j));
- cellerror = CELLERROR;
- v = "";
- } else {
- cellerror = CELLOK;
- v = seval(p->expr);
- }
- p->cellerror = cellerror;
- if (!v && !p->label) /* Everything's fine */
- return;
- if (!p->label || !v || strcmp(v, p->label) != 0 || cellerror) {
- (*chgct)++;
- p->flags |= is_changed;
- changed++;
- }
- if(p->label)
- scxfree(p->label);
- p->label = v;
- } else {
- double v;
- if (setjmp(fpe_save)) {
- error("Floating point exception %s", v_name(i, j));
- cellerror = CELLERROR;
- v = (double)0.0;
- } else {
- cellerror = CELLOK;
- gmyrow=i; gmycol=j;
- v = eval (p->expr);
- }
- if ((p->cellerror = cellerror) || (v != p->v)) {
- p->v = v;
- if (!cellerror) /* don't keep eval'ing a error */
- (*chgct)++;
- p->flags |= is_changed|is_valid;
- changed++;
- }
- }
- }
-
- struct enode *
- new(op, a1, a2)
- int op;
- struct enode *a1, *a2;
- {
- register struct enode *p;
- if (freeenodes)
- { p = freeenodes;
- freeenodes = p->e.o.left;
- }
- else
- p = (struct enode *) scxmalloc ((unsigned)sizeof (struct enode));
- p->op = op;
- p->e.o.left = a1;
- p->e.o.right = a2;
- return p;
- }
-
- struct enode *
- new_var(op, a1)
- int op;
- struct ent_ptr a1;
- {
- register struct enode *p;
- if (freeenodes)
- { p = freeenodes;
- freeenodes = p->e.o.left;
- }
- else
- p = (struct enode *) scxmalloc ((unsigned)sizeof (struct enode));
- p->op = op;
- p->e.v = a1;
- return p;
- }
-
- struct enode *
- new_range(op, a1)
- int op;
- struct range_s a1;
- {
- register struct enode *p;
- if (freeenodes)
- { p = freeenodes;
- freeenodes = p->e.o.left;
- }
- else
- p = (struct enode *) scxmalloc ((unsigned)sizeof (struct enode));
- p->op = op;
- p->e.r = a1;
- return p;
- }
-
- struct enode *
- new_const(op, a1)
- int op;
- double a1;
- {
- register struct enode *p;
- if (freeenodes) /* reuse an already free'd enode */
- { p = freeenodes;
- freeenodes = p->e.o.left;
- }
- else
- p = (struct enode *) scxmalloc ((unsigned)sizeof (struct enode));
- p->op = op;
- p->e.k = a1;
- return p;
- }
-
- struct enode *
- new_str(s)
- char *s;
- {
- register struct enode *p;
-
- if (freeenodes) /* reuse an already free'd enode */
- { p = freeenodes;
- freeenodes = p->e.o.left;
- }
- else
- p = (struct enode *) scxmalloc ((unsigned)sizeof(struct enode));
- p->op = O_SCONST;
- p->e.s = s;
- return(p);
- }
-
- void
- copy(dv1, dv2, v1, v2)
- struct ent *dv1, *dv2, *v1, *v2;
- {
- int minsr, minsc;
- int maxsr, maxsc;
- int mindr, mindc;
- int maxdr, maxdc;
- int vr, vc;
- int r, c;
-
- mindr = dv1->row;
- mindc = dv1->col;
- maxdr = dv2->row;
- maxdc = dv2->col;
- if (mindr>maxdr) r = maxdr, maxdr = mindr, mindr = r;
- if (mindc>maxdc) c = maxdc, maxdc = mindc, mindc = c;
- maxsr = v2->row;
- maxsc = v2->col;
- minsr = v1->row;
- minsc = v1->col;
- if (minsr>maxsr) r = maxsr, maxsr = minsr, minsr = r;
- if (minsc>maxsc) c = maxsc, maxsc = minsc, minsc = c;
- checkbounds(&maxdr, &maxdc);
-
- erase_area(mindr, mindc, maxdr, maxdc);
- if (minsr == maxsr && minsc == maxsc) {
- /* Source is a single cell */
- for(vr = mindr; vr <= maxdr; vr++)
- for (vc = mindc; vc <= maxdc; vc++)
- copyrtv(vr, vc, minsr, minsc, maxsr, maxsc);
- } else if (minsr == maxsr) {
- /* Source is a single row */
- for (vr = mindr; vr <= maxdr; vr++)
- copyrtv(vr, mindc, minsr, minsc, maxsr, maxsc);
- } else if (minsc == maxsc) {
- /* Source is a single column */
- for (vc = mindc; vc <= maxdc; vc++)
- copyrtv(mindr, vc, minsr, minsc, maxsr, maxsc);
- } else {
- /* Everything else */
- copyrtv(mindr, mindc, minsr, minsc, maxsr, maxsc);
- }
- sync_refs();
- }
-
- void
- copyrtv(vr, vc, minsr, minsc, maxsr, maxsc)
- int vr, vc, minsr, minsc, maxsr, maxsc;
- {
- register struct ent *p;
- register struct ent *n;
- register int sr, sc;
- register int dr, dc;
-
- for (dr=vr, sr=minsr; sr<=maxsr; sr++, dr++)
- for (dc=vc, sc=minsc; sc<=maxsc; sc++, dc++) {
- if (p = *ATBL(tbl, sr, sc))
- { n = lookat (dr, dc);
- if (n->flags&is_locked) continue;
- (void) clearent(n);
- copyent( n, p, dr - sr, dc - sc);
- }
- else
- if (n = *ATBL(tbl, dr, dc))
- (void) clearent(n);
- }
- }
-
- /* ERASE a Range of cells */
- void
- eraser(v1, v2)
- struct ent *v1, *v2;
- {
- FullUpdate++;
- flush_saved();
- erase_area(v1->row, v1->col, v2->row, v2->col);
- sync_refs();
- }
-
- /* Goto subroutines */
-
- void
- g_free()
- {
- switch (gs.g_type) {
- case G_STR: scxfree(gs.g_s); break;
- default: break;
- }
- gs.g_type = G_NONE;
- gs.errsearch = 0;
- }
-
- /* repeat the last goto command */
- void
- go_last()
- {
- switch (gs.g_type) {
- case G_NONE:
- error("Nothing to repeat"); break;
- case G_NUM:
- num_search(gs.g_n, gs.errsearch);
- break;
- case G_CELL:
- moveto(gs.g_row, gs.g_col);
- break;
- case G_STR:
- gs.g_type = G_NONE; /* Don't free the string */
- str_search(gs.g_s);
- break;
-
- default: error("go_last: internal error");
- }
- }
-
- /* place the cursor on a given cell */
- void
- moveto(row, col)
- int row, col;
- {
- currow = row;
- curcol = col;
- g_free();
- gs.g_type = G_CELL;
- gs.g_row = currow;
- gs.g_col = curcol;
- }
-
- /*
- * 'goto' either a given number,'error', or 'invalid' starting at currow,curcol
- */
- void
- num_search(n, errsearch)
- double n;
- int errsearch;
- {
- register struct ent *p;
- register int r,c;
- int endr, endc;
-
- g_free();
- gs.g_type = G_NUM;
- gs.g_n = n;
- gs.errsearch = errsearch;
-
- if (currow > maxrow)
- endr = maxrow ? maxrow-1 : 0;
- else
- endr = currow;
- if (curcol > maxcol)
- endc = maxcol ? maxcol-1 : 0;
- else
- endc = curcol;
- r = endr;
- c = endc;
- do {
- if (c < maxcol)
- c++;
- else {
- if (r < maxrow) {
- while(++r < maxrow && row_hidden[r]) /* */;
- c = 0;
- } else {
- r = 0;
- c = 0;
- }
- }
- if (r == endr && c == endc) {
- if (errsearch)
- error("no %s cell found", errsearch == CELLERROR ? "ERROR" :
- "INVALID");
- else
- error("Number not found");
- return;
- }
- p = *ATBL(tbl, r, c);
- } while (col_hidden[c] || !p || !(p->flags & is_valid)
- || (!errsearch && (p->v != n))
- || (errsearch && !((p->cellerror == errsearch) ||
- (p->cellerror == errsearch)))); /* CELLERROR vs CELLINVALID */
-
- currow = r;
- curcol = c;
- }
-
- /* 'goto' a cell containing a matching string */
- void
- str_search(s)
- char *s;
- {
- register struct ent *p;
- register int r,c;
- int endr, endc;
- char *tmp;
-
- #if defined(RE_COMP)
- if ((tmp = re_comp(s)) != (char *)0) {
- scxfree(s);
- error(tmp);
- return;
- }
- #endif
- #if defined(REGCMP)
- if ((tmp = regcmp(s, (char *)0)) == (char *)0) {
- scxfree(s);
- cellerror = CELLERROR;
- error("Invalid search string");
- return;
- }
- #endif
- g_free();
- gs.g_type = G_STR;
- gs.g_s = s;
- if (currow > maxrow)
- endr = maxrow ? maxrow-1 : 0;
- else
- endr = currow;
- if (curcol > maxcol)
- endc = maxcol ? maxcol-1 : 0;
- else
- endc = curcol;
- r = endr;
- c = endc;
- do {
- if (c < maxcol)
- c++;
- else {
- if (r < maxrow) {
- while(++r < maxrow && row_hidden[r]) /* */;
- c = 0;
- } else {
- r = 0;
- c = 0;
- }
- }
- if (r == endr && c == endc) {
- error("String not found");
- #if defined(REGCMP)
- free(tmp);
- #endif
- return;
- }
- p = *ATBL(tbl, r, c);
- } while(col_hidden[c] || !p || !(p->label)
- #if defined(RE_COMP)
- || (re_exec(p->label) == 0));
- #else
- #if defined(REGCMP)
- || (regex(tmp, p->label) == (char *)0));
- #else
- || (strcmp(s, p->label) != 0));
- #endif
- #endif
- currow = r;
- curcol = c;
- #if defined(REGCMP)
- free(tmp);
- #endif
- }
-
- /* fill a range with constants */
- void
- fill (v1, v2, start, inc)
- struct ent *v1, *v2;
- double start, inc;
- {
- register r,c;
- register struct ent *n;
- int maxr, maxc;
- int minr, minc;
-
- maxr = v2->row;
- maxc = v2->col;
- minr = v1->row;
- minc = v1->col;
- if (minr>maxr) r = maxr, maxr = minr, minr = r;
- if (minc>maxc) c = maxc, maxc = minc, minc = c;
- checkbounds(&maxr, &maxc);
- if (minr < 0) minr = 0;
- if (minc < 0) minc = 0;
-
- FullUpdate++;
- if( calc_order == BYROWS ) {
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++) {
- n = lookat (r, c);
- if (n->flags&is_locked) continue;
- (void) clearent(n);
- n->v = start;
- start += inc;
- n->flags |= (is_changed|is_valid);
- }
- }
- else if ( calc_order == BYCOLS ) {
- for (c = minc; c<=maxc; c++)
- for (r = minr; r<=maxr; r++) {
- n = lookat (r, c);
- (void) clearent(n);
- n->v = start;
- start += inc;
- n->flags |= (is_changed|is_valid);
- }
- }
- else error(" Internal error calc_order");
- changed++;
- }
-
- /* lock a range of cells */
-
- void
- lock_cells (v1, v2)
- struct ent *v1, *v2;
- {
- register r,c;
- register struct ent *n;
- int maxr, maxc;
- int minr, minc;
-
- maxr = v2->row;
- maxc = v2->col;
- minr = v1->row;
- minc = v1->col;
- if (minr>maxr) r = maxr, maxr = minr, minr = r;
- if (minc>maxc) c = maxc, maxc = minc, minc = c;
- checkbounds(&maxr, &maxc);
- if (minr < 0) minr = 0;
- if (minc < 0) minc = 0;
-
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++) {
- n = lookat (r, c);
- n->flags |= is_locked;
- }
- }
-
- /* unlock a range of cells */
-
- void
- unlock_cells (v1, v2)
- struct ent *v1, *v2;
- {
- register r,c;
- register struct ent *n;
- int maxr, maxc;
- int minr, minc;
-
- maxr = v2->row;
- maxc = v2->col;
- minr = v1->row;
- minc = v1->col;
- if (minr>maxr) r = maxr, maxr = minr, minr = r;
- if (minc>maxc) c = maxc, maxc = minc, minc = c;
- checkbounds(&maxr, &maxc);
- if (minr < 0) minr = 0;
- if (minc < 0) minc = 0;
-
- for (r = minr; r<=maxr; r++)
- for (c = minc; c<=maxc; c++) {
- n = lookat (r, c);
- n->flags &= ~is_locked;
- }
- }
-
- /* set the numeric part of a cell */
- void
- let (v, e)
- struct ent *v;
- struct enode *e;
- {
- double val;
- unsigned isconstant = constant(e);
-
- if (loading && !isconstant)
- val = (double)0.0;
- else
- {
- exprerr = 0;
- (void) signal(SIGFPE, eval_fpe);
- if (setjmp(fpe_save)) {
- error ("Floating point exception in cell %s", v_name(v->row, v->col));
- val = (double)0.0;
- cellerror = CELLERROR;
- } else {
- cellerror = CELLOK;
- val = eval(e);
- }
- if (v->cellerror != cellerror)
- { v->flags |= is_changed;
- changed++; modflg++;
- FullUpdate++;
- v->cellerror = cellerror;
- }
- (void) signal(SIGFPE, doquit);
- if (exprerr) {
- efree(e);
- return;
- }
- }
-
- if (isconstant) {
- /* prescale input unless it has a decimal */
- #if defined(IEEE_MATH) && !defined(NO_FMOD)
- if (!loading && (prescale < (double)0.9999999) &&
- (fmod(val, (double)1.0) == (double)0))
- #else
- if (!loading && (prescale < (double)0.9999999) &&
- ((val - floor(val)) == (double)0))
- #endif
- val *= prescale;
-
- v->v = val;
-
- if (!(v->flags & is_strexpr)) {
- efree(v->expr);
- v->expr = (struct enode *)0;
- }
- efree(e);
- }
- else
- {
- efree(v->expr);
- v->expr = e;
- v->flags &= ~is_strexpr;
- }
-
- changed++; modflg++;
- v->flags |= (is_changed|is_valid);
- }
-
- void
- slet (v, se, flushdir)
- struct ent *v;
- struct enode *se;
- int flushdir;
- {
- char *p;
-
- exprerr = 0;
- (void) signal(SIGFPE, eval_fpe);
- if (setjmp(fpe_save)) {
- error ("Floating point exception in cell %s", v_name(v->row, v->col));
- cellerror = CELLERROR;
- p = "";
- } else {
- cellerror = CELLOK;
- p = seval(se);
- }
- if (v->cellerror != cellerror)
- { v->flags |= is_changed;
- changed++; modflg++;
- FullUpdate++;
- v->cellerror = cellerror;
- }
- (void) signal(SIGFPE, doquit);
- if (exprerr) {
- efree(se);
- return;
- }
- if (constant(se)) {
- label(v, p, flushdir);
- if (p)
- scxfree(p);
- efree(se);
- if (v->flags & is_strexpr) {
- efree(v->expr);
- v->expr = (struct enode *)0;
- v->flags &= ~is_strexpr;
- }
- return;
- }
- efree(v->expr);
- v->expr = se;
- v->flags |= (is_changed|is_strexpr);
- if (flushdir<0) v->flags |= is_leftflush;
-
- if (flushdir==0)
- v->flags |= is_label;
- else v->flags &= ~is_label;
-
- FullUpdate++;
- changed++;
- modflg++;
- }
-
- void
- format_cell(v1, v2, s)
- struct ent *v1, *v2;
- char *s;
- {
- register r,c;
- register struct ent *n;
- int maxr, maxc;
- int minr, minc;
-
- maxr = v2->row;
- maxc = v2->col;
- minr = v1->row;
- minc = v1->col;
- if (minr>maxr) r = maxr, maxr = minr, minr = r;
- if (minc>maxc) c = maxc, maxc = minc, minc = c;
- checkbounds(&maxr, &maxc);
- if (minr < 0) minr = 0;
- if (minc < 0) minc = 0;
-
- FullUpdate++;
- modflg++;
- for (r = minr; r <= maxr; r++)
- for (c = minc; c <= maxc; c++) {
- n = lookat (r, c);
- if (n->flags&is_locked) {
- error("Cell %s%d is locked", coltoa(n->col), n->row);
- continue;
- }
- if (n->format)
- scxfree(n->format);
- n->format = 0;
- if (s && *s != '\0')
- n->format = strcpy(scxmalloc((unsigned)(strlen(s)+1)), s);
- n->flags |= is_changed;
- }
- }
-
- void
- hide_row(arg)
- int arg;
- {
- if (arg < 0) {
- error("Invalid Range");
- return;
- }
- if (arg >= maxrows-1)
- {
- if (!growtbl(GROWROW, arg+1, 0))
- { error("You can't hide the last row");
- return;
- }
- }
- FullUpdate++;
- row_hidden[arg] = 1;
- }
-
- void
- hide_col(arg)
- int arg;
- {
- if (arg < 0) {
- error("Invalid Range");
- return;
- }
- if (arg >= maxcols-1)
- { if ((arg >= ABSMAXCOLS-1) || !growtbl(GROWCOL, 0, arg+1))
- { error("You can't hide the last col");
- return;
- }
- }
- FullUpdate++;
- col_hidden[arg] = TRUE;
- }
-
- void
- clearent (v)
- struct ent *v;
- {
- if (!v)
- return;
- label(v,"",-1);
- v->v = (double)0;
- if (v->expr)
- efree(v->expr);
- v->expr = (struct enode *)0;
- if (v->format)
- scxfree(v->format);
- v->format = (char *)0;
- v->flags |= (is_changed);
- v->flags &= ~(is_valid);
- changed++;
- modflg++;
- }
-
- /*
- * Say if an expression is a constant (return 1) or not.
- */
- int
- constant (e)
- register struct enode *e;
- {
- return (
- e == (struct enode *)0
- || e -> op == O_CONST
- || e -> op == O_SCONST
- || (
- e -> op != O_VAR
- && (e -> op & REDUCE) != REDUCE
- && constant (e -> e.o.left)
- && constant (e -> e.o.right)
- && e -> op != EXT /* functions look like constants but aren't */
- && e -> op != NVAL
- && e -> op != SVAL
- && e -> op != NOW
- && e -> op != MYROW
- && e -> op != MYCOL
- && e -> op != NUMITER
- )
- );
- }
-
- void
- efree (e)
- struct enode *e;
- {
- if (e) {
- if (e->op != O_VAR && e->op !=O_CONST && e->op != O_SCONST
- && (e->op & REDUCE) != REDUCE) {
- efree(e->e.o.left);
- efree(e->e.o.right);
- }
- if (e->op == O_SCONST && e->e.s)
- scxfree(e->e.s);
- e->e.o.left = freeenodes;
- freeenodes = e;
- }
- }
-
- void
- label (v, s, flushdir)
- register struct ent *v;
- register char *s;
- int flushdir;
- {
- if (v) {
- if (flushdir==0 && v->flags&is_valid) {
- register struct ent *tv;
- if (v->col>0 && ((tv=lookat(v->row,v->col-1))->flags&is_valid)==0)
- v = tv, flushdir = 1;
- else if (((tv=lookat (v->row,v->col+1))->flags&is_valid)==0)
- v = tv, flushdir = -1;
- else flushdir = -1;
- }
- if (v->label) scxfree((char *)(v->label));
- if (s && s[0]) {
- v->label = scxmalloc ((unsigned)(strlen(s)+1));
- (void) strcpy (v->label, s);
- } else
- v->label = (char *)0;
- if (flushdir<0) v->flags |= is_leftflush;
- else v->flags &= ~is_leftflush;
- if (flushdir==0) v->flags |= is_label;
- else v->flags &= ~is_label;
- FullUpdate++;
- modflg++;
- }
- }
-
- void
- decodev (v)
- struct ent_ptr v;
- {
- register struct range *r;
-
- if (!v.vp) (void) sprintf (line+linelim,"VAR?");
- else if ((r = find_range((char *)0, 0, v.vp, v.vp)) && !r->r_is_range)
- (void) sprintf(line+linelim, "%s", r->r_name);
- else
- (void) sprintf (line+linelim, "%s%s%s%d",
- v.vf & FIX_COL ? "$" : "",
- coltoa(v.vp->col),
- v.vf & FIX_ROW ? "$" : "",
- v.vp->row);
- linelim += strlen (line+linelim);
- }
-
- char *
- coltoa(col)
- int col;
- {
- static char rname[3];
- register char *p = rname;
-
- if (col > 25) {
- *p++ = col/26 + 'A' - 1;
- col %= 26;
- }
- *p++ = col+'A';
- *p = '\0';
- return(rname);
- }
-
- /*
- * To make list elements come out in the same order
- * they were entered, we must do a depth-first eval
- * of the ELIST tree
- */
- static void
- decompile_list(p)
- struct enode *p;
- {
- if (!p) return;
- decompile_list(p->e.o.left); /* depth first */
- decompile(p->e.o.right, 0);
- line[linelim++] = ',';
- }
-
- void
- decompile(e, priority)
- register struct enode *e;
- int priority;
- {
- register char *s;
- if (e) {
- int mypriority;
- switch (e->op) {
- default: mypriority = 99; break;
- case '?': mypriority = 1; break;
- case ':': mypriority = 2; break;
- case '|': mypriority = 3; break;
- case '&': mypriority = 4; break;
- case '<': case '=': case '>': mypriority = 6; break;
- case '+': case '-': case '#': mypriority = 8; break;
- case '*': case '/': case '%': mypriority = 10; break;
- case '^': mypriority = 12; break;
- }
- if (mypriority<priority) line[linelim++] = '(';
- switch (e->op) {
- case 'f': for (s="fixed "; line[linelim++] = *s++;);
- linelim--;
- decompile (e->e.o.right, 30);
- break;
- case 'm': line[linelim++] = '-';
- decompile (e->e.o.right, 30);
- break;
- case '~': line[linelim++] = '~';
- decompile (e->e.o.right, 30);
- break;
- case O_VAR: decodev (e->e.v);
- break;
- case O_CONST: (void) sprintf (line+linelim,"%.15g",e->e.k);
- linelim += strlen (line+linelim);
- break;
- case O_SCONST: (void) sprintf (line+linelim, "\"%s\"", e->e.s);
- linelim += strlen(line+linelim);
- break;
-
- case REDUCE | '+': range_arg( "@sum(", e); break;
- case REDUCE | '*': range_arg( "@prod(", e); break;
- case REDUCE | 'a': range_arg( "@avg(", e); break;
- case REDUCE | 'c': range_arg( "@count(", e); break;
- case REDUCE | 's': range_arg( "@stddev(", e); break;
- case REDUCE | MAX: range_arg( "@max(", e); break;
- case REDUCE | MIN: range_arg( "@min(", e); break;
-
- case ABS: one_arg( "@abs(", e); break;
- case ACOS: one_arg( "@acos(", e); break;
- case ASIN: one_arg( "@asin(", e); break;
- case ATAN: one_arg( "@atan(", e); break;
- case ATAN2: two_arg( "@atan2(", e); break;
- case CEIL: one_arg( "@ceil(", e); break;
- case COS: one_arg( "@cos(", e); break;
- case EXP: one_arg( "@exp(", e); break;
- case FABS: one_arg( "@fabs(", e); break;
- case FLOOR: one_arg( "@floor(", e); break;
- case HYPOT: two_arg( "@hypot(", e); break;
- case LOG: one_arg( "@ln(", e); break;
- case LOG10: one_arg( "@log(", e); break;
- case POW: two_arg( "@pow(", e); break;
- case SIN: one_arg( "@sin(", e); break;
- case SQRT: one_arg( "@sqrt(", e); break;
- case TAN: one_arg( "@tan(", e); break;
- case DTR: one_arg( "@dtr(", e); break;
- case RTD: one_arg( "@rtd(", e); break;
- case RND: one_arg( "@rnd(", e); break;
- case ROUND: two_arg( "@round(", e); break;
- case HOUR: one_arg( "@hour(", e); break;
- case MINUTE: one_arg( "@minute(", e); break;
- case SECOND: one_arg( "@second(", e); break;
- case MONTH: one_arg( "@month(", e); break;
- case DAY: one_arg( "@day(", e); break;
- case YEAR: one_arg( "@year(", e); break;
- case DATE: one_arg( "@date(", e); break;
- case UPPER: one_arg( "@upper(", e); break;
- case LOWER: one_arg( "@lower(", e); break;
- case CAPITAL: one_arg( "@capital(", e); break;
- case DTS: three_arg( "@dts(", e); break;
- case TTS: three_arg( "@tts(", e); break;
- case STON: one_arg( "@ston(", e); break;
- case FMT: two_arg( "@fmt(", e); break;
- case EQS: two_arg( "@eqs(", e); break;
- case NOW: for ( s = "@now"; line[linelim++] = *s++;);
- linelim--;
- break;
- case LMAX: list_arg("@max(", e); break;
- case LMIN: list_arg("@min(", e); break;
- case FV: three_arg("@fv(", e); break;
- case PV: three_arg("@pv(", e); break;
- case PMT: three_arg("@pmt(", e); break;
- case NVAL: two_arg("@nval(", e); break;
- case SVAL: two_arg("@sval(", e); break;
- case EXT: two_arg("@ext(", e); break;
- case SUBSTR: three_arg("@substr(", e); break;
- case STINDEX: index_arg("@stindex(", e); break;
- case INDEX: index_arg("@index(", e); break;
- case LOOKUP: index_arg("@lookup(", e); break;
- case HLOOKUP: two_arg_index("@hlookup(", e); break;
- case VLOOKUP: two_arg_index("@vlookup(", e); break;
- case IF: three_arg("@if(", e); break;
- case MYROW: for ( s = "@myrow"; line[linelim++] = *s++;);
- linelim--;
- break;
- case MYCOL: for ( s = "@mycol"; line[linelim++] = *s++;);
- linelim--;
- break;
- case COLTOA: one_arg( "@coltoa(", e); break;
- case NUMITER: for ( s = "@numiter"; line[linelim++] = *s++;);
- linelim--;
- break;
- default: decompile (e->e.o.left, mypriority);
- line[linelim++] = e->op;
- decompile (e->e.o.right, mypriority+1);
- break;
- }
- if (mypriority<priority) line[linelim++] = ')';
- } else line[linelim++] = '?';
- }
-
- void
- index_arg(s, e)
- char *s;
- struct enode *e;
- {
- for (; line[linelim++] = *s++;);
- linelim--;
- decompile( e-> e.o.left, 0 );
- range_arg(", ", e->e.o.right);
- }
-
- void
- two_arg_index(s, e)
- char *s;
- struct enode *e;
- {
- for (; line[linelim++] = *s++;);
- linelim--;
- decompile( e->e.o.left->e.o.left, 0 );
- range_arg(",", e->e.o.right);
- linelim--;
- line[linelim++] = ',';
- decompile( e->e.o.left->e.o.right, 0 );
- line[linelim++] = ')';
- }
-
- void
- list_arg(s, e)
- char *s;
- struct enode *e;
- {
- for (; line[linelim++] = *s++;);
- linelim--;
-
- decompile (e->e.o.right, 0);
- line[linelim++] = ',';
- decompile_list(e->e.o.left);
- line[linelim - 1] = ')';
- }
-
- void
- one_arg(s, e)
- char *s;
- struct enode *e;
- {
- for (; line[linelim++] = *s++;);
- linelim--;
- decompile (e->e.o.right, 0);
- line[linelim++] = ')';
- }
-
- void
- two_arg(s,e)
- char *s;
- struct enode *e;
- {
- for (; line[linelim++] = *s++;);
- linelim--;
- decompile (e->e.o.left, 0);
- line[linelim++] = ',';
- decompile (e->e.o.right, 0);
- line[linelim++] = ')';
- }
-
- void
- three_arg(s,e)
- char *s;
- struct enode *e;
- {
- for (; line[linelim++] = *s++;);
- linelim--;
- decompile (e->e.o.left, 0);
- line[linelim++] = ',';
- decompile (e->e.o.right->e.o.left, 0);
- line[linelim++] = ',';
- decompile (e->e.o.right->e.o.right, 0);
- line[linelim++] = ')';
- }
-
- void
- range_arg(s,e)
- char *s;
- struct enode *e;
- {
- struct range *r;
-
- for (; line[linelim++] = *s++;);
- linelim--;
- if ((r = find_range((char *)0, 0, e->e.r.left.vp,
- e->e.r.right.vp)) && r->r_is_range) {
- (void) sprintf(line+linelim, "%s", r->r_name);
- linelim += strlen(line+linelim);
- } else {
- decodev (e->e.r.left);
- line[linelim++] = ':';
- decodev (e->e.r.right);
- }
- line[linelim++] = ')';
- }
-
- void
- editfmt (row, col)
- int row, col;
- {
- register struct ent *p;
-
- p = lookat (row, col);
- if (p->format) {
- (void) sprintf (line, "fmt %s \"%s\"", v_name(row, col), p->format);
- linelim = strlen(line);
- }
- }
-
- void
- editv (row, col)
- int row, col;
- {
- register struct ent *p;
-
- p = lookat (row, col);
- (void) sprintf (line, "let %s = ", v_name(row, col));
- linelim = strlen(line);
- if (p->flags & is_strexpr || p->expr == 0) {
- (void) sprintf (line+linelim, "%.15g", p->v);
- linelim += strlen (line+linelim);
- } else {
- editexp(row,col);
- }
- }
-
- void
- editexp(row,col)
- int row, col;
- {
- register struct ent *p;
-
- p = lookat (row, col);
- decompile (p->expr, 0);
- line[linelim] = '\0';
- }
-
- void
- edits (row, col)
- int row, col;
- {
- register struct ent *p;
-
- p = lookat (row, col);
- if( p->flags&is_label )
- (void) sprintf( line, "label %s = ", v_name(row, col));
- else
- (void) sprintf (line, "%sstring %s = ",
- ((p->flags&is_leftflush) ? "left" : "right"),
- v_name(row, col));
- linelim = strlen(line);
- if (p->flags & is_strexpr && p->expr) {
- editexp(row, col);
- } else if (p->label) {
- (void) sprintf (line+linelim, "\"%s\"", p->label);
- linelim += strlen (line+linelim);
- } else {
- (void) sprintf (line+linelim, "\"");
- linelim += 1;
- }
- }
-
- #ifdef RINT
- /* round-to-even, also known as ``banker's rounding''.
- With round-to-even, a number exactly halfway between two values is
- rounded to whichever is even; e.g. rnd(0.5)=0, rnd(1.5)=2,
- rnd(2.5)=2, rnd(3.5)=4. This is the default rounding mode for
- IEEE floating point, for good reason: it has better numeric
- properties. For example, if X+Y is an integer,
- then X+Y = rnd(X)+rnd(Y) with round-to-even,
- but not always with sc's rounding (which is
- round-to-positive-infinity). I ran into this problem when trying to
- split interest in an account to two people fairly.
- */
- double rint(d) double d;
- {
- /* as sent */
- double fl = floor(d), fr = d-fl;
- return
- fr<0.5 || fr==0.5 && fl==floor(fl/2)*2 ? fl : ceil(d);
- }
- #endif
-