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/* SC A Spreadsheet Calculator
* Spreadsheet 'tbl' creation
*
* 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.
* Currently supported by sequent!sawmill!buhrt (Jeff Buhrt)
* $Revision: 6.21 $
*
*/
#ifdef PSC
# include <stdio.h>
#else /* PSC */
# include <curses.h>
#endif /* PSC */
#include "sc.h"
/*
* check to see if *rowp && *colp are currently allocated, if not expand the
* current size if we can.
*/
#ifndef PSC
void
checkbounds(rowp, colp)
int *rowp;
int *colp;
{
if (*rowp < 0)
*rowp = 0;
else if (*rowp >= maxrows)
{ if (*colp >= maxcols)
{ if (!growtbl(GROWBOTH, *rowp, *colp))
{ *rowp = maxrows -1;
*colp = maxcols -1;
}
return;
}
else
{ if (!growtbl(GROWROW, *rowp, 0))
*rowp = maxrows-1;
return;
}
}
if (*colp < 0)
*colp = 0;
else if (*colp >= maxcols)
{ if (!growtbl(GROWCOL, 0, *colp))
*colp = maxcols-1;
}
}
#endif /* !PSC */
/* scxrealloc will just scxmalloc if oldptr is == NULL */
#define GROWALLOC(newptr, oldptr, nelem, type, msg) \
newptr = (type *)scxrealloc((char *)oldptr, \
(unsigned)(nelem*sizeof(type))); \
if (newptr == (type *)NULL) \
{ error(msg); \
return(FALSE); \
} \
oldptr = newptr /* wait incase we can't alloc */
#ifndef PSC
static char nolonger[] = "The table can't be any longer";
#endif
static char nowider[] = "The table can't be any wider";
/*
* grow the main && auxiliary tables (reset maxrows/maxcols as needed)
* toprow &&/|| topcol tell us a better guess of how big to become.
* we return TRUE if we could grow, FALSE if not....
*/
int
growtbl(rowcol, toprow, topcol)
int rowcol;
int toprow, topcol;
{
int *fwidth2;
int *precision2;
int *realfmt2;
int newcols;
#ifndef PSC
struct ent ***tbl2;
struct ent ** nullit;
int cnt;
char *col_hidden2;
char *row_hidden2;
int newrows;
int i;
newrows = maxrows;
#endif /* !PSC */
newcols = maxcols;
if (rowcol == GROWNEW)
{
#ifndef PSC
maxrows = toprow = 0;
/* when we first start up, fill the screen w/ cells */
{ int startval;
startval = LINES - RESROW;
newrows = startval > MINROWS ? startval : MINROWS;
startval = ((COLS) - RESCOL) / DEFWIDTH;
newcols = startval > MINCOLS ? startval : MINCOLS;
}
#else
newcols = MINCOLS;
#endif /* !PSC */
maxcols = topcol = 0;
}
#ifndef PSC
/* set how much to grow */
if ((rowcol == GROWROW) || (rowcol == GROWBOTH))
{ if (toprow > maxrows)
newrows = GROWAMT + toprow;
else
newrows += GROWAMT;
}
#endif /* !PSC */
if ((rowcol == GROWCOL) || (rowcol == GROWBOTH))
{ if ((rowcol == GROWCOL) && ((maxcols == ABSMAXCOLS) ||
(topcol >= ABSMAXCOLS)))
{ error(nowider);
return(FALSE);
}
if (topcol > maxcols)
newcols = GROWAMT + topcol;
else
newcols += GROWAMT;
if (newcols > ABSMAXCOLS)
newcols = ABSMAXCOLS;
}
#ifndef PSC
if ((rowcol == GROWROW) || (rowcol == GROWBOTH) || (rowcol == GROWNEW))
{
struct ent *** lnullit;
int lcnt;
GROWALLOC(row_hidden2, row_hidden, newrows, char, nolonger);
memset(row_hidden+maxrows, 0, (newrows-maxrows)*sizeof(char));
/*
* alloc tbl row pointers, per net.lang.c, calloc does not
* necessarily fill in NULL pointers
*/
GROWALLOC(tbl2, tbl, newrows, struct ent **, nolonger);
for(lnullit = tbl+maxrows, lcnt = 0; lcnt < newrows-maxrows;
lcnt++, lnullit++)
*lnullit = (struct ent **)NULL;
/* memset(tbl+maxrows, (char *)NULL, (newrows-maxrows)*(sizeof(struct ent **)));*/
}
#endif /* !PSC */
if ((rowcol == GROWCOL) || (rowcol == GROWBOTH) || (rowcol == GROWNEW))
{
GROWALLOC(fwidth2, fwidth, newcols, int, nowider);
GROWALLOC(precision2, precision, newcols, int, nowider);
GROWALLOC(realfmt2, realfmt, newcols, int, nowider);
#ifdef PSC
memset(fwidth+maxcols, 0, (newcols-maxcols)*sizeof(int));
memset(precision+maxcols, 0, (newcols-maxcols)*sizeof(int));
memset(realfmt+maxcols, 0, (newcols-maxcols)*sizeof(int));
}
#else
GROWALLOC(col_hidden2, col_hidden, newcols, char, nowider);
memset(col_hidden+maxcols, 0, (newcols-maxcols)*sizeof(char));
for (i = maxcols; i < newcols; i++) {
fwidth[i] = DEFWIDTH;
precision[i] = DEFPREC;
realfmt[i]= DEFREFMT;
}
/* [re]alloc the space for each row */
for (i = 0; i < maxrows; i++)
{
if ((tbl[i] = (struct ent **)scxrealloc((char *)tbl[i],
(unsigned)(newcols * sizeof(struct ent **)))) == (struct ent **)0)
{ error(nowider);
return(FALSE);
}
for(nullit = ATBL(tbl, i, maxcols), cnt = 0;
cnt < newcols-maxcols; cnt++, nullit++)
*nullit = (struct ent *)NULL;
/* memset((char *)ATBL(tbl,i, maxcols), 0,
(newcols-maxcols)*sizeof(struct ent **));
*/
}
}
else
i = maxrows;
/* fill in the bottom of the table */
for (; i < newrows; i++)
{ if ((tbl[i] = (struct ent **)scxmalloc((unsigned)(newcols *
sizeof(struct ent **)))) == (struct ent **)0)
{ error(nowider);
return(FALSE);
}
for(nullit = tbl[i], cnt = 0; cnt < newcols; cnt++, nullit++)
*nullit = (struct ent *)NULL;
/* memset((char *)tbl[i], 0, newcols*sizeof(struct ent **));*/
}
FullUpdate++;
maxrows = newrows;
#endif /* PSC */
maxcols = newcols;
return(TRUE);
}
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