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interp.c
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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: 7.16 $
*/
#include <sys/types.h>
#ifdef aiws
#undef _C_func /* Fixes for undefined symbols on AIX */
#endif
#ifdef USE_IEEEFP_H
# include <ieeefp.h>
#endif
#include <math.h>
#include <signal.h>
#include <setjmp.h>
#include <ctype.h>
#include <errno.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#ifndef MSDOS
#include <unistd.h>
#endif
#ifdef REGCOMP
#include <regex.h>
#endif
#include "compat.h"
#include "sc.h"
#ifdef RE_COMP
extern char *re_comp(char *s);
extern char *re_exec(char *s);
#endif
#ifdef REGCMP
char *regcmp();
char *regex();
#endif
/* Use this structure to save the last 'g' command */
struct go_save gs;
/* g_type can be: */
#define G_NONE 0 /* Starting value - must be 0 */
#define G_NUM 1
#define G_STR 2
#define G_NSTR 3
#define G_XSTR 4
#define G_CELL 5
#define ISVALID(r,c) ((r)>=0 && (r)<maxrows && (c)>=0 && (c)<maxcols)
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 */
int rowoffset = 0, coloffset = 0; /* row & col offsets for range
functions */
extern bool decimal; /* Set if there was a decimal point in the number */
/* a linked list of free [struct enodes]'s, uses .e.o.left as the pointer */
struct enode *freeenodes = NULL;
double dolookup(struct enode * val, int minr, int minc, int maxr,
int maxc, int offr, int offc);
double fn1_eval(double (*fn)(), double arg);
double fn2_eval(double (*fn)(), double arg1, double arg2);
static int RealEvalAll(void);
int constant(register struct enode *e);
void RealEvalOne(register struct ent *p, int i, int j, int *chgct);
void copydbuf(int deltar, int deltac);
void decompile(register struct enode *e, int priority);
void index_arg(char *s, struct enode *e);
void list_arg(char *s, struct enode *e);
void one_arg(char *s, struct enode *e);
void range_arg(char *s, struct enode *e);
void three_arg(char *s, struct enode *e);
void two_arg(char *s, struct enode *e);
void two_arg_index(char *s, struct enode *e);
static double finfunc(int, double, double, double);
static char *dostindex(int, int, int, int, struct enode *);
static double doindex(int, int, int, int, struct enode *);
static double docount(int, int, int, int, struct enode *);
static double dosum(int, int, int, int, struct enode *);
static double doprod(int, int, int, int, struct enode *);
static double doavg(int, int, int, int, struct enode *);
static double dostddev(int, int, int, int, struct enode *);
static double domax(int, int, int, int, struct enode *);
static double domin(int, int, int, int, struct enode *);
static double dodts(int, int, int);
static double dotts(int, int, int);
static double dotime(int, double);
static double doston(char *);
static double doeqs(char *, char *);
static struct ent *getent(char *, double);
static double donval(char *, double);
static double dolmax(struct enode *);
static double dolmin(struct enode *);
static char *docat(register char *, register char *);
static char *dodate(time_t, char *);
static char *dofmt(char *, double);
static char *doext(struct enode *);
static char *dosval(char *, double);
static void decodev(struct ent_ptr);
static char *docapital(char *);
static char *docase(int, char *);
static char *dosubstr(char *, register int, register int);
double rint(double d);
int cellerror = CELLOK; /* is there an error in this cell */
static void g_free(void);
static
#ifdef SIGVOID
void
#else
int
#endif
eval_fpe(int);
#ifndef M_PI
#define M_PI (double)3.14159265358979323846
#endif
#define dtr(x) ((x)*(M_PI/(double)180.0))
#define rtd(x) ((x)*(180.0/(double)M_PI))
static double
finfunc(int fun, double v1, double v2, double 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);
}
static char *
dostindex(int minr, int minc, int maxr, int maxc, struct enode *val)
{
int r, c;
register struct ent *p;
char *pr;
p = (struct ent *)0;
if (minr == maxr) { /* look along the row */
r = minr;
c = minc + (int) eval(val) - 1;
} else if (minc == maxc) { /* look down the column */
r = minr + (int) eval(val) - 1;
c = minc;
} else {
r = minr + (int) eval(val->e.o.left) - 1;
c = minc + (int) eval(val->e.o.right) - 1;
}
if (c <= maxc && c >=minc && r <= maxr && r >=minr)
p = *ATBL(tbl, r, c);
if (p && p->label) {
size_t l = strlen(p->label) + 1;
pr = scxmalloc(l);
strlcpy(pr, p->label, l);
if (p->cellerror)
cellerror = CELLINVALID;
return (pr);
} else
return ((char *)0);
}
static double
doindex(int minr, int minc, int maxr, int maxc, struct enode *val)
{
int r, c;
register struct ent *p;
if (val->op == ',') { /* index by both row and column */
r = minr + (int) eval(val->e.o.left) - 1;
c = minc + (int) eval(val->e.o.right) - 1;
} else if (minr == maxr) { /* look along the row */
r = minr;
c = minc + (int) eval(val) - 1;
} else if (minc == maxc) { /* look down the column */
r = minr + (int) eval(val) - 1;
c = minc;
} else {
error("Improper indexing operation");
return (double) 0;
}
if (c <= maxc && c >=minc && r <= maxr && r >=minr &&
(p = *ATBL(tbl, r, c)) && p->flags&IS_VALID) {
if (p->cellerror)
cellerror = CELLINVALID;
return p->v;
} else
return (double) 0;
}
double
dolookup(struct enode * val, int minr, int minc, int maxr, int maxc, int offset, int vflag)
{
double v, ret = (double)0;
int r, c;
register struct ent *p = (struct ent *)0;
int incr, incc, fndr, fndc;
char *s;
incr = vflag; incc = 1 - vflag;
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 + offset) : r;
fndc = incr ? (minc + offset) : 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 + offset) : r;
fndc = incr ? (minc + offset) : 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;
}
static double
docount(int minr, int minc, int maxr, int maxc, struct enode *e)
{
int v;
int r, c;
int cellerr = CELLOK;
register struct ent *p;
v = 0;
for (r = minr; r<=maxr; r++)
for (c = minc; c<=maxc; c++) {
if (e) {
rowoffset = r - minr;
coloffset = c - minc;
}
if (!e || eval(e))
if ((p = *ATBL(tbl, r, c)) && p->flags & IS_VALID) {
if (p->cellerror)
cellerr = CELLINVALID;
v++;
}
}
cellerror = cellerr;
rowoffset = coloffset = 0;
return v;
}
static double
dosum(int minr, int minc, int maxr, int maxc, struct enode *e)
{
double v;
int r, c;
int cellerr = CELLOK;
register struct ent *p;
v = (double)0;
for (r = minr; r<=maxr; r++)
for (c = minc; c<=maxc; c++) {
if (e) {
rowoffset = r - minr;
coloffset = c - minc;
}
if (!e || eval(e))
if ((p = *ATBL(tbl, r, c)) && p->flags & IS_VALID) {
if (p->cellerror)
cellerr = CELLINVALID;
v += p->v;
}
}
cellerror = cellerr;
rowoffset = coloffset = 0;
return v;
}
static double
doprod(int minr, int minc, int maxr, int maxc, struct enode *e)
{
double v;
int r, c;
int cellerr = CELLOK;
register struct ent *p;
v = 1;
for (r = minr; r<=maxr; r++)
for (c = minc; c<=maxc; c++) {
if (e) {
rowoffset = r - minr;
coloffset = c - minc;
}
if (!e || eval(e))
if ((p = *ATBL(tbl, r, c)) && p->flags & IS_VALID) {
if (p->cellerror)
cellerr = CELLINVALID;
v *= p->v;
}
}
cellerror = cellerr;
rowoffset = coloffset = 0;
return v;
}
static double
doavg(int minr, int minc, int maxr, int maxc, struct enode *e)
{
double v;
int r, c;
int count;
int cellerr = CELLOK;
register struct ent *p;
v = (double)0;
count = 0;
for (r = minr; r<=maxr; r++)
for (c = minc; c<=maxc; c++) {
if (e) {
rowoffset = r - minr;
coloffset = c - minc;
}
if (!e || eval(e))
if ((p = *ATBL(tbl, r, c)) && p->flags&IS_VALID) {
if (p->cellerror)
cellerr = CELLINVALID;
v += p->v;
count++;
}
}
cellerror = cellerr;
rowoffset = coloffset = 0;
if (count == 0)
return ((double)0);
return (v / (double)count);
}
static double
dostddev(int minr, int minc, int maxr, int maxc, struct enode *e)
{
double lp, rp, v, nd;
int r, c;
int n;
int cellerr = CELLOK;
register struct ent *p;
n = 0;
lp = 0;
rp = 0;
for (r = minr; r<=maxr; r++)
for (c = minc; c<=maxc; c++) {
if (e) {
rowoffset = r - minr;
coloffset = c - minc;
}
if (!e || eval(e))
if ((p = *ATBL(tbl, r, c)) && p->flags&IS_VALID) {
if (p->cellerror)
cellerr = CELLINVALID;
v = p->v;
lp += v*v;
rp += v;
n++;
}
}
cellerror = cellerr;
rowoffset = coloffset = 0;
if ((n == 0) || (n == 1))
return ((double)0);
nd = (double)n;
return (sqrt((nd*lp-rp*rp)/(nd*(nd-1))));
}
static double
domax(int minr, int minc, int maxr, int maxc, struct enode *e)
{
double v = (double)0;
int r, c;
int count;
int cellerr = CELLOK;
register struct ent *p;
count = 0;
for (r = minr; r<=maxr; r++)
for (c = minc; c<=maxc; c++) {
if (e) {
rowoffset = r - minr;
coloffset = c - minc;
}
if (!e || eval(e))
if ((p = *ATBL(tbl, r, c)) && p->flags&IS_VALID) {
if (p->cellerror)
cellerr = CELLINVALID;
if (!count) {
v = p->v;
count++;
} else if (p->v > v)
v = p->v;
}
}
cellerror = cellerr;
rowoffset = coloffset = 0;
if (count == 0)
return ((double)0);
return (v);
}
static double
domin(int minr, int minc, int maxr, int maxc, struct enode *e)
{
double v = (double)0;
int r, c;
int count;
int cellerr = CELLOK;
register struct ent *p;
count = 0;
for (r = minr; r<=maxr; r++)
for (c = minc; c<=maxc; c++) {
if (e) {
rowoffset = r - minr;
coloffset = c - minc;
}
if (!e || eval(e))
if ((p = *ATBL(tbl, r, c)) && p->flags&IS_VALID) {
if (p->cellerror)
cellerr = CELLINVALID;
if (!count) {
v = p->v;
count++;
} else if (p->v < v)
v = p->v;
}
}
cellerror = cellerr;
rowoffset = coloffset = 0;
if (count == 0)
return ((double)0);
return (v);
}
int mdays[12]={ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
static double
dodts(int e1, int e2, int e3)
{
int yr, mo, day;
time_t secs;
struct tm t;
if (e2 > 12 || e3 > 31) {
mo = e1;
day = e2;
yr = e3;
} else {
yr = e1;
mo = e2;
day = e3;
}
mdays[1] = 28 + (yr%4 == 0) - (yr%100 == 0) + (yr%400 == 0);
t.tm_hour = t.tm_min = t.tm_sec = 0;
t.tm_mon = --mo;
t.tm_mday = day;
t.tm_year = yr -= 1900;
t.tm_isdst = -1;
if (mo < 0 || mo > 11 || day < 1 || day > mdays[mo] ||
(secs = mktime(&t)) == -1) {
error("@dts: invalid argument or date out of range");
cellerror = CELLERROR;
return (0.0);
}
return ((double)secs);
}
static double
dotts(int hr, int min, int 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));
}
static double
dotime(int which, double when)
{
static time_t t_cache;
static struct tm tm_cache;
struct tm *tp;
time_t tloc;
if (which == NOW)
return (double)time(NULL);
tloc = (time_t)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);
}
static double
doston(char *s)
{
double v;
if (!s)
return ((double)0);
v = strtod(s, NULL);
scxfree(s);
return(v);
}
static double
doeqs(char *s1, char *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 row
* 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.
*/
static struct ent *
getent(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.
*/
static double
donval(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.
*/
static double
dolmax(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;
}
static double
dolmin(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(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 '-': {
double l, r;
l = eval(e->e.o.left);
r = eval(e->e.o.right);
return l - r;
}
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 (cellerror) {
cellerror = CELLINVALID;
return ((double) 0);
} else
if (denom)
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 '=': {
double l, r;
l = eval(e->e.o.left);
r = eval(e->e.o.right);
return (l == r);
}
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.left));
case 'f': {
int rtmp = rowoffset;
int ctmp = coloffset;
double ret;
rowoffset = coloffset = 0;
ret = eval(e->e.o.left);
rowoffset = rtmp;
coloffset = ctmp;
return (ret);
}
case 'F': return (eval(e->e.o.left));
case '!': return (eval(e->e.o.left) == 0.0);
case ';': return (((int)eval(e->e.o.left) & 7) +
(((int)eval(e->e.o.right) & 7) << 3));
case O_CONST: if (!
#ifdef HAVE_ISFINITE
isfinite(
#else
finite(
#endif
e->e.k)) {
e->op = ERR_;
e->e.k = (double) 0;
cellerror = CELLERROR;
}
return (e->e.k);
case O_VAR: {
struct ent *vp = e->e.v.vp;
int row, col;
if (vp && (rowoffset || coloffset)) {
row = e->e.v.vf & FIX_ROW ? vp->row
: vp->row + rowoffset;
col = e->e.v.vf & FIX_COL ? vp->col
: vp->col + coloffset;
checkbounds(&row, &col);
vp = *ATBL(tbl, row, col);
}
if (!vp || vp->flags & IS_DELETED) {
cellerror = CELLERROR;
return (double) 0;
}
if (vp->cellerror)
cellerror = CELLINVALID;
return (vp->v);
}
case SUM:
case PROD:
case AVG:
case COUNT:
case STDDEV:
case MAX:
case MIN:
case INDEX:
case LOOKUP:
case HLOOKUP:
case VLOOKUP: {
int r, c;
int maxr, maxc;
int minr, minc;
maxr = e->e.o.left->e.r.right.vp->row;
maxc = e->e.o.left->e.r.right.vp->col;
minr = e->e.o.left->e.r.left.vp->row;
minc = e->e.o.left->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.right, minr, minc, maxr, maxc,
1, minc==maxc);
case HLOOKUP:
return dolookup(e->e.o.right->e.o.left, minr,minc,maxr,maxc,
(int) eval(e->e.o.right->e.o.right), 0);
case VLOOKUP:
return dolookup(e->e.o.right->e.o.left, minr,minc,maxr,maxc,
(int) eval(e->e.o.right->e.o.right), 1);
case INDEX:
return doindex(minr, minc, maxr, maxc, e->e.o.right);
case SUM:
return dosum(minr, minc, maxr, maxc, e->e.o.right);
case PROD:
return doprod(minr, minc, maxr, maxc, e->e.o.right);
case AVG:
return doavg(minr, minc, maxr, maxc, e->e.o.right);
case COUNT:
return docount(minr, minc, maxr, maxc, e->e.o.right);
case STDDEV:
return dostddev(minr, minc, maxr, maxc, e->e.o.right);
case MAX:
return domax(minr, minc, maxr, maxc, e->e.o.right);
case MIN:
return domin(minr, minc, maxr, maxc, e->e.o.right);
}
}
case REDUCE | 'R':
case REDUCE | 'C':
{ int r, c;
int maxr, maxc;
int 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 | 'R': return (maxr - minr + 1);
case REDUCE | 'C': return (maxc - minc + 1);
}
}
case ABS: return (fn1_eval( fabs, eval(e->e.o.left)));
case ACOS: return (fn1_eval( acos, eval(e->e.o.left)));
case ASIN: return (fn1_eval( asin, eval(e->e.o.left)));
case ATAN: return (fn1_eval( atan, eval(e->e.o.left)));
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.left)));
case COS: return (fn1_eval( cos, eval(e->e.o.left)));
case EXP: return (fn1_eval( exp, eval(e->e.o.left)));
case FABS: return (fn1_eval( fabs, eval(e->e.o.left)));
case FLOOR: return (fn1_eval( floor, eval(e->e.o.left)));
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.left)));
case LOG10: return (fn1_eval( log10, eval(e->e.o.left)));
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.left)));
case SQRT: return (fn1_eval( sqrt, eval(e->e.o.left)));
case TAN: return (fn1_eval( tan, eval(e->e.o.left)));
case DTR: return (dtr(eval(e->e.o.left)));
case RTD: return (rtd(eval(e->e.o.left)));
case RND:
if (rndtoeven)
return rint(eval(e->e.o.left));
else {
double temp = eval(e->e.o.left);
return (temp - floor(temp) < 0.5 ? floor(temp) : ceil(temp));
}
case ROUND:
{ int prec = (int) eval(e->e.o.right);
double scale = 1;
if (0 < prec)
do scale *= 10; while (0 < --prec);
else if (prec < 0)
do scale /= 10; while (++prec < 0);
if (rndtoeven)
return (rint(eval(e->e.o.left) * scale) / scale);
else {
double temp = eval(e->e.o.left);
temp *= scale;
/* xxx */
/*
temp = (temp > 0.0 ? floor(temp + 0.5) : ceil(temp - 0.5));
*/
temp = ((temp - floor(temp)) < 0.5 ?
floor(temp) : ceil(temp));
return (temp / scale);
}
}
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.left)));
case MINUTE: return (dotime(MINUTE, eval(e->e.o.left)));
case SECOND: return (dotime(SECOND, eval(e->e.o.left)));
case MONTH: return (dotime(MONTH, eval(e->e.o.left)));
case DAY: return (dotime(DAY, eval(e->e.o.left)));
case YEAR: return (dotime(YEAR, eval(e->e.o.left)));
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.left)));
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 + rowoffset));
case MYCOL: return ((double) (gmycol + coloffset));
case LASTROW: return ((double) maxrow);
case LASTCOL: return ((double) maxcol);
case NUMITER: return ((double) repct);
case ERR_: cellerror = CELLERROR;
return ((double) 0);
case PI_: return ((double) M_PI);
case BLACK: return ((double) COLOR_BLACK);
case RED: return ((double) COLOR_RED);
case GREEN: return ((double) COLOR_GREEN);
case YELLOW: return ((double) COLOR_YELLOW);
case BLUE: return ((double) COLOR_BLUE);
case MAGENTA: return ((double) COLOR_MAGENTA);
case CYAN: return ((double) COLOR_CYAN);
case WHITE: return ((double) COLOR_WHITE);
default: error ("Illegal numeric expression");
exprerr = 1;
}
cellerror = CELLERROR;
return ((double)0.0);
}
static
#ifdef SIGVOID
void
#else
int
#endif