/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ /* tb.c: check which entries exist, also storage allocation */# include "t.h" voidcheckuse(void){	int	i, c, k; 	for (c = 0; c < ncol; c++) {		used[c] = lused[c] = rused[c] = 0;		for (i = 0; i < nlin; i++) {			if (instead[i] || fullbot[i]) 				continue;			k = ctype(i, c);			if (k == '-' || k == '=') 				continue;			if ((k == 'n' || k == 'a')) {				rused[c] |= real(table[i][c].rcol);				if ( !real(table[i][c].rcol))					used[c] |= real(table[i][c].col);				if (table[i][c].rcol)					lused[c] |= real(table[i][c].col);			} else				used[c] |= real(table[i][c].col);		}	}}  intreal(char *s){	if (s == 0) 		return(0);	if (!point(s)) 		return(1);	if (*s == 0) 		return(0);	return(1);}  int	spcount = 0;# define MAXVEC 20char	*spvecs[MAXVEC]; char	*chspace(void){	char	*pp; 	if (spvecs[spcount])		return(spvecs[spcount++]);	if (spcount >= MAXVEC)		error("Too many characters in table");	spvecs[spcount++] = pp = calloc(MAXCHS + MAXLINLEN, 1);	if (pp == (char *) - 1 || pp == (char *)0)		error("no space for characters");	return(pp);}  # define MAXPC 50char	*thisvec;int	tpcount = -1;char	*tpvecs[MAXPC]; int	*alocv(int n){	int	*tp, *q; 	if (tpcount < 0 || thisvec + n > tpvecs[tpcount] + MAXCHS) {		tpcount++;		if (tpvecs[tpcount] == 0) {			tpvecs[tpcount] = calloc(MAXCHS, 1);		}		thisvec = tpvecs[tpcount];		if (thisvec == (char *)0)			error("no space for vectors");	}	tp = (int *)thisvec;	thisvec += n;	for (q = tp; q < (int *)thisvec; q++)		*q = 0;	return(tp);}  voidrelease(void){			/* give back unwanted space in some vectors */			/* this should call free; it does not because				alloc() is so buggy */	spcount = 0;	tpcount = -1;	exstore = 0;}