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sc.c
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/* SC A Spreadsheet Calculator
* Main driver
*
* original by James Gosling, September 1982
* modifications 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: 7.13 $
*
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <curses.h>
#include <ctype.h>
#include <getopt.h>
#ifdef BSD42
#include <strings.h>
#else
#ifndef SYSIII
#include <string.h>
#endif
#endif
#if defined(BSD42) || defined(BSD43) || defined(VMS)
#include <sys/file.h>
#else
#include <fcntl.h>
#endif
#ifndef MSDOS
#include <unistd.h>
#endif
#include <stdlib.h>
#include "sc.h"
#ifndef SAVENAME
#define SAVENAME "SC.SAVE" /* file name to use for emergency saves */
#endif /* SAVENAME */
#ifndef DFLT_PAGER
#define DFLT_PAGER "more" /* more is probably more widespread than less */
#endif /* DFLT_PAGER */
#define MAXCMD 160 /* for ! command below */
/* Globals defined in sc.h */
struct ent ***tbl;
int arg = 1;
int strow = 0, stcol = 0;
int currow = 0, curcol = 0;
int savedrow[27], savedcol[27];
int savedstrow[27], savedstcol[27];
int FullUpdate = 0;
int maxrow, maxcol;
int maxrows, maxcols;
int *fwidth;
int *precision;
int *realfmt;
char *col_hidden;
char *row_hidden;
char line[FBUFLEN];
int changed;
struct ent *delbuf[4];
int dbidx;
int modflg;
int cellassign;
int numeric;
char *mdir;
char *autorun;
char *fkey[FKEYS];
char *scext;
char *ascext;
char *tbl0ext;
char *tblext;
char *latexext;
char *slatexext;
char *texext;
int scrc = 0;
int showsc, showsr; /* Starting cell for highlighted range */
int usecurses = TRUE; /* Use curses unless piping/redirection or using -q */
int brokenpipe = FALSE; /* Set to true if SIGPIPE is received */
#ifdef RIGHT_CBUG
int wasforw = FALSE;
#endif
void update();
void repaint();
char curfile[PATHLEN];
char revmsg[80];
int linelim = -1;
int showtop = 1; /* Causes current cell value display in top line */
int showcell = 1; /* Causes current cell to be highlighted */
int showrange = 0; /* Causes ranges to be highlighted */
int showneed = 0; /* Causes cells needing values to be highlighted */
int showexpr = 0; /* Causes cell exprs to be displayed, highlighted */
int shownote = 0; /* Causes cells with attached notes to be
highlighted */
int autocalc = 1; /* 1 to calculate after each update */
int autolabel = 1; /* If room, causes label to be created after a define */
int autoinsert = 0; /* Causes rows to be inserted if craction is non-zero
and the last cell in a row/column of the scrolling
portion of a framed range has been filled */
int calc_order = BYROWS;
int optimize = 0; /* Causes numeric expressions to be optimized */
int tbl_style = 0; /* headers for T command output */
int rndtoeven = 0;
int color = 0; /* Use color */
int colorneg = 0; /* Increment color number for cells with negative
numbers */
int colorerr = 0; /* Color cells with errors with color 3 */
int numeric_field = 0; /* Started the line editing with a number */
int craction = 0; /* 1 for down, 2 for right */
int pagesize = 0; /* If nonzero, use instead of 1/2 screen height */
int rowlimit = -1;
int collimit = -1;
int rowsinrange = 1;
int colsinrange = DEFWIDTH;
extern int lastmx, lastmy; /* Screen address of the cursor */
extern int lastcol, lcols; /* Spreadsheet Column the cursor was in last */
extern int lastendrow; /* Last bottom row of screen */
extern int framerows; /* Rows in current frame */
extern int framecols; /* Columns in current frame */
extern char mode_ind; /* Mode indicator */
/* a linked list of free [struct ent]'s, uses .next as the pointer */
struct ent *freeents = NULL;
extern int seenerr;
extern char *rev;
#ifdef VMS
int VMS_read_raw = 0;
#endif
/* return a pointer to a cell's [struct ent *], creating if needed */
struct ent *
lookat(int row, int col)
{
register struct ent **pp;
checkbounds(&row, &col);
pp = ATBL(tbl, row, col);
if (*pp == (struct ent *)0) {
if (freeents != NULL) {
*pp = freeents;
(*pp)->flags &= ~(is_cleared);
freeents = freeents->next;
} else
*pp = (struct ent *) scxmalloc((unsigned)sizeof(struct ent));
if (row>maxrow) maxrow = row;
if (col>maxcol) maxcol = col;
(*pp)->label = (char *)0;
(*pp)->row = row;
(*pp)->col = col;
(*pp)->nrow = -1;
(*pp)->ncol = -1;
(*pp)->flags = 0;
(*pp)->expr = (struct enode *)0;
(*pp)->v = (double) 0.0;
(*pp)->format = (char *)0;
(*pp)->cellerror = CELLOK;
(*pp)->next = NULL;
}
return (*pp);
}
/*
* This structure is used to keep ent structs around before they
* are deleted to allow the sync_refs routine a chance to fix the
* variable references.
* We also use it as a last-deleted buffer for the 'p' command.
*/
void
free_ent(register struct ent *p)
{
p->next = delbuf[dbidx];
delbuf[dbidx] = p;
p->flags |= is_deleted;
p->flags &= ~is_locked;
}
/* free deleted cells */
void
flush_saved()
{
register struct ent *p;
register struct ent *q;
if (dbidx < 0)
return;
(p = delbuf[dbidx]);
while (p) {
(void) clearent(p);
q = p->next;
p->next = freeents; /* put this ent on the front of freeents */
freeents = p;
p = q;
}
delbuf[dbidx--] = NULL;
}
char *progname;
int Vopt;
int
main (int argc, char **argv)
{
int inloop = 1;
register int c;
int edistate = -1;
int narg;
int nedistate;
int running;
char *revi;
char *home;
int anychanged = FALSE;
int tempx, tempy; /* Temp versions of curx, cury */
/*
* Keep command line options around until the file is read so the
* command line overrides file options
*/
int Mopt = 0;
int Oopt = 0;
int Nopt = 0;
int Copt = 0;
int Ropt = 0;
int Eopt = 0;
int Popt = 0;
int Qopt = 0;
Vopt = 0;
#ifdef MSDOS
if ((revi = strrchr(argv[0], '\\')) != NULL)
#else
#ifdef VMS
if ((revi = strrchr(argv[0], ']')) != NULL)
#else
if ((revi = strrchr(argv[0], '/')) != NULL)
#endif
#endif
progname = revi+1;
else
progname = argv[0];
while ((c = getopt(argc, argv, "xmoncrCReP:vq")) != EOF) {
switch (c) {
case 'x':
#if defined(VMS) || defined(MSDOS) || !defined(CRYPT_PATH)
(void) fprintf(stderr, "Crypt not available\n");
exit (1);
#else
Crypt = 1;
#endif
break;
case 'm':
Mopt = 1;
break;
case 'o':
Oopt = 1;
break;
case 'n':
Nopt = 1;
break;
case 'c':
Copt = 1;
break;
case 'r':
Ropt = 1;
break;
case 'C':
craction = CRCOLS;
break;
case 'R':
craction = CRROWS;
break;
case 'e':
rndtoeven = 1;
Eopt = 1;
break;
case 'P':
Popt = 1;
case 'v':
break;
case 'q':
Qopt = 1;
break;
default:
(void) fprintf(stderr,"Usage: %s [-cemnoqrxCR] [file...]\n",
progname);
exit (1);
}
}
if (!isatty(STDOUT_FILENO) || Popt || Qopt) usecurses = FALSE;
startdisp();
signals();
/* setup the spreadsheet arrays, initscr() will get the screen size */
if (!growtbl(GROWNEW, 0, 0)) {
stopdisp();
exit (1);
}
/*
* Build revision message for later use:
*/
if (Popt)
*revmsg = '\0';
else {
(void) strcpy(revmsg, progname);
for (revi = rev; (*revi++) != ':'; ); /* copy after colon */
(void) strcat(revmsg, revi);
revmsg[strlen(revmsg) - 2] = 0; /* erase last character */
(void) strcat(revmsg, ": Type '?' for help.");
}
#ifndef MSDOS
if (optind < argc && !strcmp(argv[optind], "--"))
optind++;
if (optind < argc && argv[optind][0] != '|' &&
!strcmp(argv[optind], "-"))
#else
if (optind < argc)
#endif /* MSDOS */
(void) strcpy(curfile, argv[optind]);
if (optind < argc) {
readfile(argv[optind], 1);
EvalAll();
optind++;
} else
erasedb();
while (optind < argc) {
readfile(argv[optind], 0);
optind++;
}
EvalAll();
if (!(Popt || isatty(STDIN_FILENO)))
readfile("-", 0);
if (Qopt) {
stopdisp();
exit (0);
}
if (usecurses && has_colors())
initcolor(0);
clearok(stdscr, TRUE);
EvalAll();
if (Mopt)
autocalc = 0;
if (Oopt)
optimize = 1;
if (Nopt)
numeric = 1;
if (Copt)
calc_order = BYCOLS;
if (Ropt)
calc_order = BYROWS;
if (Eopt)
rndtoeven = 1;
if (Popt) {
char *redraw = NULL;
int o;
optind = 0;
stopdisp();
while ((o = getopt(argc, argv, "xmoncrCReP:vq")) != EOF) {
switch (o) {
case 'v':
Vopt = 1;
break;
case 'P':
if (*optarg == '/') {
int in, out;
in = dup(STDIN_FILENO);
out = dup(STDOUT_FILENO);
freopen("/dev/tty", "r", stdin);
freopen("/dev/tty", "w", stdout);
usecurses = TRUE;
startdisp();
if (has_colors()) {
initcolor(0);
bkgd(COLOR_PAIR(1) | ' ');
}
clearok(stdscr, TRUE);
FullUpdate++;
linelim = 0;
*line = '\0';
if (mode_ind != 'v')
write_line(ctl('v'));
error("Select range:");
update(1);
while (!linelim) {
int c;
switch (c = nmgetch()) {
case '.':
case ':':
case ctl('i'):
if (!showrange) {
write_line(c);
break;
}
/* else drop through */
case ctl('m'):
strcpy(line, "put ");
linelim = 4;
write_line('.');
if (showrange)
write_line('.');
strcat(line, optarg);
break;
case ESC:
case ctl('g'):
case 'q':
linelim = -1;
break;
case ctl('l'):
FullUpdate++;
clearok(stdscr,1);
break;
default:
write_line(c);
break;
}
/* goto switches to insert mode when done, so we
* have to switch back.
*/
if (mode_ind == 'i')
write_line(ctl('v'));
error("Select range:");
update(1);
}
stopdisp();
dup2(in, STDIN_FILENO);
dup2(out, STDOUT_FILENO);
close(in);
close(out);
redraw = "recalc\nredraw\n";
} else {
strcpy(line, "put ");
linelim = 4;
strcat(line, optarg);
}
if (linelim > 0) {
linelim = 0;
yyparse();
}
Vopt = 0;
break;
default:
break;
}
}
if (redraw) printf(redraw);
exit (0);
}
if (!isatty(STDOUT_FILENO)) {
stopdisp();
write_fd(stdout, 0, 0, maxrow, maxcol);
exit (0);
}
modflg = 0;
cellassign = 0;
#ifdef VENIX
setbuf(stdin, NULL);
#endif
while (inloop) { running = 1;
while (running) {
nedistate = -1;
narg = 1;
if (edistate < 0 && linelim < 0 && autocalc && (changed || FullUpdate))
{
EvalAll();
if (changed) /* if EvalAll changed or was before */
anychanged = TRUE;
changed = 0;
}
else /* any cells change? */
if (changed)
anychanged = TRUE;
update(anychanged);
anychanged = FALSE;
#ifndef SYSV3 /* HP/Ux 3.1 this may not be wanted */
(void) refresh(); /* 5.3 does a refresh in getch */
#endif
c = nmgetch();
getyx(stdscr, tempy, tempx);
(void) move(1, 0);
(void) clrtoeol();
(void) move(tempy, tempx);
seenerr = 0;
showneed = 0; /* reset after each update */
showexpr = 0;
shownote = 0;
/*
* there seems to be some question about what to do w/ the iscntrl
* some BSD systems are reportedly broken as well
*/
/* if ((c < ' ') || ( c == DEL )) how about international here ? PB */
#if pyr
if(iscntrl(c) || (c >= 011 && c <= 015)) /* iscntrl broken in OSx4.1 */
#else
if ((isascii(c) && (iscntrl(c) || (c == 020))) || /* iscntrl broken in OSx4.1 */
c == KEY_END || c == KEY_BACKSPACE)
#endif
switch(c) {
#ifdef SIGTSTP
case ctl('z'):
(void) deraw(1);
(void) kill(0, SIGTSTP); /* Nail process group */
/* the pc stops here */
(void) goraw();
break;
#endif
case ctl('r'):
showneed = 1;
case ctl('l'):
FullUpdate++;
(void) clearok(stdscr,1);
break;
case ctl('x'):
FullUpdate++;
showexpr = 1;
(void) clearok(stdscr,1);
break;
default:
error ("No such command (^%c)", c + 0100);
break;
case ctl('b'):
{
int ps;
ps = pagesize ? pagesize : (LINES - RESROW - framerows)/2;
backrow(arg * ps);
strow = strow - (arg * ps);
if (strow < 0) strow = 0;
FullUpdate++;
}
break;
case ctl('c'):
running = 0;
break;
case KEY_END:
case ctl('e'):
if (linelim < 0 || mode_ind == 'v') {
switch (c = nmgetch()) {
case KEY_UP:
case ctl('p'): case 'k': doend(-1, 0); break;
case KEY_DOWN:
case ctl('n'): case 'j': doend( 1, 0); break;
case KEY_LEFT:
case KEY_BACKSPACE:
case ctl('h'): case 'h': doend( 0,-1); break;
case KEY_RIGHT:
case ' ':
case ctl('i'): case 'l': doend( 0, 1); break;
case ctl('e'):
case ctl('y'):
while (c == ctl('e') || c == ctl('y')) {
int x = arg;
while (arg) {
if (c == ctl('e')) {
strow++;
while (strow && row_hidden[strow])
strow++;
if (currow < strow)
currow = strow;
} else {
strow--;
while (row_hidden[strow])
strow--;
forwrow(x);
if (currow >= lastendrow)
backrow(1);
backrow(x);
}
arg--;
}
FullUpdate++;
update(0);
arg++;
c = nmgetch();
}
ungetch(c);
break;
case ESC:
case ctl('g'):
break;
default:
error("Invalid ^E command");
break;
}
} else
write_line(ctl('e'));
break;
case ctl('y'):
while (c == ctl('e') || c == ctl('y')) {
int x = arg;
while (arg) {
if (c == ctl('e')) {
strow++;
while (strow && row_hidden[strow])
strow++;
if (currow < strow)
currow = strow;
} else {
strow--;
while (row_hidden[strow])
strow--;
forwrow(x);
if (currow >= lastendrow)
backrow(1);
backrow(x);
}
arg--;
}
FullUpdate++;
update(0);
arg++;
c = nmgetch();
}
ungetch(c);
break;
case ctl('f'):
{
int ps;
ps = pagesize ? pagesize : (LINES - RESROW - framerows)/2;
forwrow(arg * ps);
strow = strow + (arg * ps);
FullUpdate++;
}
break;
case ctl('g'):
showrange = 0;
linelim = -1;
(void) move(1, 0);
(void) clrtoeol();
break;
case ESC: /* ctl('[') */
write_line(ESC);
break;
case ctl('d'):
write_line(ctl('d'));
break;
case KEY_BACKSPACE:
case DEL:
case ctl('h'):
if (linelim < 0) { /* not editing line */
backcol(arg); /* treat like ^B */
break;
}
write_line(ctl('h'));
break;
case ctl('i'): /* tab */
if (linelim < 0) { /* not editing line */
forwcol(arg);
break;
}
write_line(ctl('i'));
break;
case ctl('m'):
case ctl('j'):
numeric_field = 0;
write_line(ctl('m'));
break;
case ctl('n'):
c = craction;
if (numeric_field) {
craction = 0;
write_line(ctl('m'));
numeric_field = 0;
}
craction = c;
if (linelim < 0) {
forwrow(arg);
break;
}
write_line(ctl('n'));
break;
case ctl('p'):
c = craction;
if (numeric_field) {
craction = 0;
write_line(ctl('m'));
numeric_field = 0;
}
craction = c;
if (linelim < 0) {
backrow(arg);
break;
}
write_line(ctl('p'));
break;
case ctl('q'):
break; /* ignore flow control */
case ctl('s'):
break; /* ignore flow control */
case ctl('t'):
#if !defined(VMS) && !defined(MSDOS) && defined(CRYPT_PATH)
error(
"Toggle: a:auto,c:cell,e:ext funcs,n:numeric,t:top,x:encrypt,$:pre-scale,<MORE>");
#else /* no encryption available */
error(
"Toggle: a:auto,c:cell,e:ext funcs,n:numeric,t:top,$:pre-scale,<MORE>");
#endif
(void) refresh();
switch (nmgetch()) {
case 'a': case 'A':
case 'm': case 'M':
autocalc ^= 1;
error("Automatic recalculation %sabled.",
autocalc ? "en":"dis");
break;
case 'o': case 'O':
optimize ^= 1;
error("%sptimize expressions upon entry.",
optimize ? "O":"Do not o");
break;
case 'n':
numeric = (!numeric);
error("Numeric input %sabled.",
numeric ? "en" : "dis");
break;
case 't': case 'T':
showtop = (!showtop);
error("Top line %sabled.", showtop ? "en" : "dis");
break;
case 'c':
showcell = (!showcell);
repaint(lastmx, lastmy, fwidth[lastcol]);
error("Cell highlighting %sabled.",
showcell ? "en" : "dis");
break;
case 's':
cslop ^= 1;
error("Color slop %sabled.",
cslop ? "en" : "dis");
break;
case 'C':
color = !color;
if (has_colors())
if (color) {
attron(COLOR_PAIR(1));
bkgd(COLOR_PAIR(1) | ' ');
} else {
attron(COLOR_PAIR(0));
bkgd(COLOR_PAIR(0) | ' ');
}
error("Color %sabled.", color ? "en" : "dis");
break;
case 'N':
colorneg = !colorneg;
error("Color changing of negative numbers %sabled.",
colorneg ? "en" : "dis");
break;
case 'E':
colorerr = !colorerr;
error("Color changing of cells with errors %sabled.",
colorerr ? "en" : "dis");
break;
case 'x': case 'X':
#if defined(VMS) || defined(MSDOS) || !defined(CRYPT_PATH)
error("Encryption not available.");
#else
Crypt = (! Crypt);
error("Encryption %sabled.", Crypt? "en" : "dis");
#endif
break;
case 'l': case 'L':
autolabel = (!autolabel);
error("Autolabel %sabled.",
autolabel? "en" : "dis");
break;
case '$':
if (prescale == 1.0) {
error("Prescale enabled.");
prescale = 0.01;
} else {
prescale = 1.0;
error("Prescale disabled.");
}
break;
case 'e':
extfunc = (!extfunc);
error("External functions %sabled.",
extfunc? "en" : "dis");
break;
case ESC:
case ctl('g'):
--modflg; /* negate the modflg++ */
break;
case 'r': case 'R':
error("Which direction after return key?");
switch(nmgetch()) {
case ctl('m'):
craction = 0;
error("No action after new line");
break;
case 'j':
case ctl('n'):
craction = CRROWS;
error("Down row after new line");
break;
case 'l':
case ' ':
craction = CRCOLS;
error("Right column after new line");
break;
case ESC:
case ctl('g'):
error("");
break;
default:
error("Not a valid direction");
}
break;
case 'i': case 'I':
autoinsert = (!autoinsert);
error("Autoinsert %sabled.",
autoinsert? "en" : "dis");
break;
case 'z': case 'Z':
rowlimit = currow;
collimit = curcol;
error("Row and column limits set");
break;
default:
error("Invalid toggle command");
--modflg; /* negate the modflg++ */
}
FullUpdate++;
modflg++;
break;
case ctl('u'):
narg = arg * 4;
nedistate = 1;
break;
case ctl('v'): /* switch to navigate mode, or if already *
* in navigate mode, insert variable name */
if (linelim >= 0)
write_line(ctl('v'));
break;
case ctl('w'): /* insert variable expression */
if (linelim >= 0) {
static char *temp = NULL, *temp1 = NULL;
static unsigned templen = 0;
int templim;
/* scxrealloc will scxmalloc if needed */
if (strlen(line)+1 > templen) {
templen = strlen(line)+40;
temp = scxrealloc(temp, templen);
temp1= scxrealloc(temp1, templen);
}
strcpy(temp, line);
templim = linelim;
linelim = 0; /* reset line to empty */
editexp(currow,curcol);
strcpy(temp1, line);
strcpy(line, temp);
linelim = templim;
ins_string(temp1);
}
break;
case ctl('a'):
if (linelim >= 0)
write_line(c);
else {
/* Remember the current position */
savedrow[0] = currow;
savedcol[0] = curcol;
savedstrow[0] = strow;
savedstcol[0] = stcol;
currow = 0;
curcol = 0;
rowsinrange = 1;
colsinrange = fwidth[curcol];
FullUpdate++;
}
break;
} /* End of the control char switch stmt */
else if (isascii(c) && isdigit(c) && ((!numeric && linelim < 0) ||
(linelim >= 0 && (mode_ind == 'e' || mode_ind == 'v')) ||
edistate >= 0)) {
/* we got a leading number */
if (edistate != 0) {
/* First char of the count */
if (c == '0') { /* just a '0' goes to left col */
if (linelim >= 0)
write_line(c);
else {
/* Remember the current position */
savedrow[0] = currow;
savedcol[0] = curcol;
savedstrow[0] = strow;
savedstcol[0] = stcol;
curcol = 0;
rowsinrange = 1;
colsinrange = fwidth[curcol];
}
} else {
nedistate = 0;
narg = c - '0';
}
} else {
/* Succeeding count chars */
nedistate = 0;
narg = arg * 10 + (c - '0');
}
} else if (c == KEY_F(1) && !fkey[c - KEY_F0 - 1]) {
deraw(1);
system("man sc");
goraw();
} else if (linelim >= 0) {
/* Editing line */
switch (c) {
case ')':
case ',':
if (showrange)
showdr();
break;
default:
break;
}
write_line(c);
} else if (!numeric && ( c == '+' || c == '-' )) {
/* increment/decrement ops */
register struct ent *p = *ATBL(tbl, currow, curcol);
if (!p || !(p->flags & is_valid))
continue;
if (p->expr && !(p->flags & is_strexpr)) {
error("Can't increment/decrement a formula\n");
continue;
}
FullUpdate++;
modflg++;
if (c == '+')
p->v += (double) arg;
else
p->v -= (double) arg;
} else if (c > KEY_F0 && c <= KEY_F(FKEYS)) {