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include <tbset.h>
define SZ_COLVAL SZ_LINE
# The following procedures treat a table as if it were a stack, that is,
# all reading and writing is done at the end of the table. The end of the
# table is indicated by TB_NROWS.
#
# B.Simon 25-Apr-88 Original
# B.Simon 27-Jan-98 Drop temporary tables
# PUSHSTACK -- Push a null row on the top of a table stack
procedure pushstack (tp)
pointer tp # i: Table descriptor
#--
int top
int tbpsta()
begin
top = tbpsta (tp, TBL_NROWS) + 1
call tbtwer (tp, top)
end
# POPSTACK -- Pop the top row from a table stack
procedure popstack (tp)
pointer tp # i: Table descriptor
#--
int top
int tbpsta()
begin
top = tbpsta (tp, TBL_NROWS)
if (top > 0)
call tbrdel (tp, top, top)
end
# NUMSTACK -- Return the number of rows in a table stack
int procedure numstack (tp)
pointer tp # i: Table descriptor
#--
int tbpsta()
begin
return (tbpsta (tp, TBL_NROWS))
end
# INITSTACK -- Initialize a table stack and return its descriptor
pointer procedure initstack (tp, extra)
pointer tp # i: Table to use as a template for the table stack
char extra[ARB] # i: Extra columns to add to the table stack
#--
char comma
int ic, jc
pointer sp, cp, stack, colname, colunits, colfmt, tmproot, tmpfile
int stridx()
pointer tbtopn()
errchk tbtopn, tbtcre
begin
# Set up arrays in dynamic memory
call smark (sp)
call salloc (colname, SZ_COLNAME, TY_CHAR)
call salloc (colunits, SZ_COLUNITS, TY_CHAR)
call salloc (colfmt, SZ_COLFMT, TY_CHAR)
call salloc (tmproot, SZ_FNAME, TY_CHAR)
call salloc (tmpfile, SZ_FNAME, TY_CHAR)
# Create the stack table
call mktemp ("tmp$stk", Memc[tmproot], SZ_FNAME)
call tbtext (Memc[tmproot], Memc[tmpfile], SZ_FNAME)
stack = tbtopn (Memc[tmpfile], NEW_COPY, tp)
# Set up column information that will not vary across columns
Memc[colunits] = EOS
Memc[colfmt] = EOS
# Add column names from the extra string
ic = 1
comma = ','
repeat {
# Copy the next comma delimeted column name
jc = stridx (comma, extra[ic])
if (jc == 0)
call strcpy (extra[ic], Memc[colname], SZ_COLNAME)
else
call strcpy (extra[ic], Memc[colname], jc-1)
ic = ic + jc
# Create the new column
if (Memc[colname] != EOS)
call tbcdef (stack, cp, Memc[colname], Memc[colunits],
Memc[colfmt], TY_INT, 1, 1)
} until (jc == 0)
# Return the stack table descriptor
call tbtcre (stack)
call sfree (sp)
return (stack)
end
# FREESTACK -- Close and delete a table stack
procedure freestack (tp)
pointer tp # i: Table descriptor
#--
pointer sp, table
begin
call smark (sp)
call salloc (table, SZ_FNAME, TY_CHAR)
call tbtnam (tp, Memc[table], SZ_FNAME)
call tbtclo (tp)
call delete (Memc[table])
call sfree (sp)
end
# PUTSTACKT -- Put a text string in the top row of a table stack
int procedure putstackt (tp, colname, colval)
pointer tp # i: Table descriptor
char colname[ARB] # i: Column name
char colval[ARB] # i: Column value
#--
int top, found
pointer cp
int tbpsta()
begin
top = tbpsta (tp, TBL_NROWS)
call tbcfnd (tp, colname, cp, 1)
found = NO
if (cp != NULL) {
ifnoerr {
call tbrptt (tp, cp, colval, ARB, 1, top)
} then {
found = YES
}
}
return (found)
end
# PUTSTACKI -- Put an integer in the top row of a table stack
procedure putstacki (tp, colname, colval)
pointer tp # i: Table descriptor
char colname[ARB] # i: Column name
int colval # i: Column value
#--
int top
pointer cp
int tbpsta()
begin
top = tbpsta (tp, TBL_NROWS)
call tbcfnd (tp, colname, cp, 1)
call tbepti (tp, cp, top, colval)
end
# ANDSTACK -- Combine the top two rows of the table stack
procedure andstack (tp)
pointer tp # i: Table descriptor
#--
int top
int tbpsta()
begin
top = tbpsta (tp, TBL_NROWS)
call movtbrow (tp, top, tp, top-1)
call tbrdel (tp, top, top)
end
# MOVSTACK -- Move the top row of one table stack to another
procedure movstack (rtp, wtp)
pointer rtp # i: Table descriptor of table read from
pointer wtp # i: Table descriptor of table written to
#--
int rtop, wtop
int tbpsta()
begin
call pushstack (wtp)
rtop = tbpsta (rtp, TBL_NROWS)
wtop = tbpsta (wtp, TBL_NROWS)
call movtbrow (rtp, rtop, wtp, wtop)
call tbrdel (rtp, rtop, rtop)
end
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