path: root/table.c

/* $Id: table.c,v 1.58 2010/08/09 11:59:19 htrb Exp $ */
/* 
 * HTML table
 */
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "fm.h"
#include "html.h"
#include "parsetagx.h"
#include "Str.h"
#include "myctype.h"

int symbol_width = 0;
int symbol_width0 = 0;

#define RULE_WIDTH symbol_width
#define RULE(mode,n) (((mode) == BORDER_THICK) ? ((n) + 16) : (n))
#define TK_VERTICALBAR(mode) RULE(mode,5)

#define BORDERWIDTH     2
#define BORDERHEIGHT    1
#define NOBORDERWIDTH   1
#define NOBORDERHEIGHT  0

#define HTT_X   1
#define HTT_Y   2
#define HTT_ALIGN  0x30
#define HTT_LEFT   0x00
#define HTT_CENTER 0x10
#define HTT_RIGHT  0x20
#define HTT_TRSET  0x40
#define HTT_VALIGN 0x700
#define HTT_TOP    0x100
#define HTT_MIDDLE 0x200
#define HTT_BOTTOM 0x400
#define HTT_VTRSET 0x800
#ifdef NOWRAP
#define HTT_NOWRAP  4
#endif				/* NOWRAP */
#define TAG_IS(s,tag,len) (strncasecmp(s,tag,len)==0&&(s[len] == '>' || IS_SPACE((int)s[len])))

#ifndef max
#define max(a,b)        ((a) > (b) ? (a) : (b))
#endif				/* not max */
#ifndef min
#define min(a,b)        ((a) > (b) ? (b) : (a))
#endif				/* not min */
#ifndef abs
#define abs(a)          ((a) >= 0. ? (a) : -(a))
#endif				/* not abs */

#define set_prevchar(x,y,n) Strcopy_charp_n((x),(y),(n))
#define set_space_to_prevchar(x) Strcopy_charp_n((x)," ",1)

#ifdef MATRIX
#ifndef MESCHACH
#include "matrix.c"
#endif				/* not MESCHACH */
#endif				/* MATRIX */

#ifdef MATRIX
int correct_table_matrix(struct table *, int, int, int, double);
void set_table_matrix(struct table *, int);
#endif				/* MATRIX */

#ifdef MATRIX
static double
weight(int x)
{

    if (x < COLS)
	return (double)x;
    else
	return COLS * (log((double)x / COLS) + 1.);
}

static double
weight2(int a)
{
    return (double)a / COLS * 4 + 1.;
}

#define sigma_td(a)       (0.5*weight2(a))	/* <td width=...> */
#define sigma_td_nw(a)    (32*weight2(a))	/* <td ...> */
#define sigma_table(a)    (0.25*weight2(a))	/* <table width=...> */
#define sigma_table_nw(a) (2*weight2(a))	/* <table...> */
#else				/* not MATRIX */
#define LOG_MIN 1.0
static double
weight3(int x)
{
    if (x < 0.1)
	return 0.1;
    if (x < LOG_MIN)
	return (double)x;
    else
	return LOG_MIN * (log((double)x / LOG_MIN) + 1.);
}
#endif				/* not MATRIX */

static int
bsearch_2short(short e1, short *ent1, short e2, short *ent2, int base,
	       short *indexarray, int nent)
{
    int n = nent;
    int k = 0;

    int e = e1 * base + e2;
    while (n > 0) {
	int nn = n / 2;
	int idx = indexarray[k + nn];
	int ne = ent1[idx] * base + ent2[idx];
	if (ne == e) {
	    k += nn;
	    break;
	}
	else if (ne < e) {
	    n -= nn + 1;
	    k += nn + 1;
	}
	else {
	    n = nn;
	}
    }
    return k;
}

static int
bsearch_double(double e, double *ent, short *indexarray, int nent)
{
    int n = nent;
    int k = 0;

    while (n > 0) {
	int nn = n / 2;
	int idx = indexarray[k + nn];
	double ne = ent[idx];
	if (ne == e) {
	    k += nn;
	    break;
	}
	else if (ne > e) {
	    n -= nn + 1;
	    k += nn + 1;
	}
	else {
	    n = nn;
	}
    }
    return k;
}

static int
ceil_at_intervals(int x, int step)
{
    int mo = x % step;
    if (mo > 0)
	x += step - mo;
    else if (mo < 0)
	x -= mo;
    return x;
}

static int
floor_at_intervals(int x, int step)
{
    int mo = x % step;
    if (mo > 0)
	x -= mo;
    else if (mo < 0)
	x += step - mo;
    return x;
}

#define round(x) ((int)floor((x)+0.5))

#ifndef MATRIX
static void
dv2sv(double *dv, short *iv, int size)
{
    int i, k, iw;
    short *indexarray;
    double *edv;
    double w = 0., x;

    indexarray = NewAtom_N(short, size);
    edv = NewAtom_N(double, size);
    for (i = 0; i < size; i++) {
	iv[i] = (short) ceil(dv[i]);
	edv[i] = (double)iv[i] - dv[i];
    }

    w = 0.;
    for (k = 0; k < size; k++) {
	x = edv[k];
	w += x;
	i = bsearch_double(x, edv, indexarray, k);
	if (k > i) {
	    int ii;
	    for (ii = k; ii > i; ii--)
		indexarray[ii] = indexarray[ii - 1];
	}
	indexarray[i] = k;
    }
    iw = min((int)(w + 0.5), size);
    if (iw <= 1)
	return;
    x = edv[(int)indexarray[iw - 1]];
    for (i = 0; i < size; i++) {
	k = indexarray[i];
	if (i >= iw && abs(edv[k] - x) > 1e-6)
	    break;
	iv[k]--;
    }
}
#endif

static int
table_colspan(struct table *t, int row, int col)
{
    int i;
    for (i = col + 1; i <= t->maxcol && (t->tabattr[row][i] & HTT_X); i++) ;
    return i - col;
}

static int
table_rowspan(struct table *t, int row, int col)
{
    int i;
    if (!t->tabattr[row])
	return 0;
    for (i = row + 1; i <= t->maxrow && t->tabattr[i] &&
	 (t->tabattr[i][col] & HTT_Y); i++) ;
    return i - row;
}

static int
minimum_cellspacing(int border_mode)
{
    switch (border_mode) {
    case BORDER_THIN:
    case BORDER_THICK:
    case BORDER_NOWIN:
	return RULE_WIDTH;
    case BORDER_NONE:
	return 1;
    default:
	/* not reached */
	return 0;
    }
}

static int
table_border_width(struct table *t)
{
    switch (t->border_mode) {
    case BORDER_THIN:
    case BORDER_THICK:
	return t->maxcol * t->cellspacing + 2 * (RULE_WIDTH + t->cellpadding);
    case BORDER_NOWIN:
    case BORDER_NONE:
	return t->maxcol * t->cellspacing;
    default:
	/* not reached */
	return 0;
    }
}

struct table *
newTable()
{
    struct table *t;
    int i, j;

    t = New(struct table);
    t->max_rowsize = MAXROW;
    t->tabdata = New_N(GeneralList **, MAXROW);
    t->tabattr = New_N(table_attr *, MAXROW);
    t->tabheight = NewAtom_N(short, MAXROW);
#ifdef ID_EXT
    t->tabidvalue = New_N(Str *, MAXROW);
    t->tridvalue = New_N(Str, MAXROW);
#endif				/* ID_EXT */

    for (i = 0; i < MAXROW; i++) {
	t->tabdata[i] = NULL;
	t->tabattr[i] = 0;
	t->tabheight[i] = 0;
#ifdef ID_EXT
	t->tabidvalue[i] = NULL;
	t->tridvalue[i] = NULL;
#endif				/* ID_EXT */
    }
    for (j = 0; j < MAXCOL; j++) {
	t->tabwidth[j] = 0;
	t->minimum_width[j] = 0;
	t->fixed_width[j] = 0;
    }
    t->cell.maxcell = -1;
    t->cell.icell = -1;
    t->ntable = 0;
    t->tables_size = 0;
    t->tables = NULL;
#ifdef MATRIX
    t->matrix = NULL;
    t->vector = NULL;
#endif				/* MATRIX */
#if 0
    t->tabcontentssize = 0;
    t->indent = 0;
    t->linfo.prev_ctype = PC_ASCII;
    t->linfo.prev_spaces = -1;
#endif
    t->linfo.prevchar = Strnew_size(8);
    set_prevchar(t->linfo.prevchar, "", 0);
    t->trattr = 0;

    t->caption = Strnew();
    t->suspended_data = NULL;
#ifdef ID_EXT
    t->id = NULL;
#endif
    return t;
}

static void
check_row(struct table *t, int row)
{
    int i, r;
    GeneralList ***tabdata;
    table_attr **tabattr;
    short *tabheight;
#ifdef ID_EXT
    Str **tabidvalue;
    Str *tridvalue;
#endif				/* ID_EXT */

    if (row >= t->max_rowsize) {
	r = max(t->max_rowsize * 2, row + 1);
	tabdata = New_N(GeneralList **, r);
	tabattr = New_N(table_attr *, r);
	tabheight = NewAtom_N(short, r);
#ifdef ID_EXT
	tabidvalue = New_N(Str *, r);
	tridvalue = New_N(Str, r);
#endif				/* ID_EXT */
	for (i = 0; i < t->max_rowsize; i++) {
	    tabdata[i] = t->tabdata[i];
	    tabattr[i] = t->tabattr[i];
	    tabheight[i] = t->tabheight[i];
#ifdef ID_EXT
	    tabidvalue[i] = t->tabidvalue[i];
	    tridvalue[i] = t->tridvalue[i];
#endif				/* ID_EXT */
	}
	for (; i < r; i++) {
	    tabdata[i] = NULL;
	    tabattr[i] = NULL;
	    tabheight[i] = 0;
#ifdef ID_EXT
	    tabidvalue[i] = NULL;
	    tridvalue[i] = NULL;
#endif				/* ID_EXT */
	}
	t->tabdata = tabdata;
	t->tabattr = tabattr;
	t->tabheight = tabheight;
#ifdef ID_EXT
	t->tabidvalue = tabidvalue;
	t->tridvalue = tridvalue;
#endif				/* ID_EXT */
	t->max_rowsize = r;
    }

    if (t->tabdata[row] == NULL) {
	t->tabdata[row] = New_N(GeneralList *, MAXCOL);
	t->tabattr[row] = NewAtom_N(table_attr, MAXCOL);
#ifdef ID_EXT
	t->tabidvalue[row] = New_N(Str, MAXCOL);
#endif				/* ID_EXT */
	for (i = 0; i < MAXCOL; i++) {
	    t->tabdata[row][i] = NULL;
	    t->tabattr[row][i] = 0;
#ifdef ID_EXT
	    t->tabidvalue[row][i] = NULL;
#endif				/* ID_EXT */
	}
    }
}

void
pushdata(struct table *t, int row, int col, char *data)
{
    check_row(t, row);
    if (t->tabdata[row][col] == NULL)
	t->tabdata[row][col] = newGeneralList();

    pushText(t->tabdata[row][col], data ? data : "");
}

void
suspend_or_pushdata(struct table *tbl, char *line)
{
    if (tbl->flag & TBL_IN_COL)
	pushdata(tbl, tbl->row, tbl->col, line);
    else {
	if (!tbl->suspended_data)
	    tbl->suspended_data = newTextList();
	pushText(tbl->suspended_data, line ? line : "");
    }
}

#ifdef USE_M17N
#define PUSH_TAG(str,n) Strcat_charp_n(tagbuf, str, n)
#else
#define PUSH_TAG(str,n) Strcat_char(tagbuf, *str)
#endif

int visible_length_offset = 0;
int
visible_length(char *str)
{
    int len = 0, n, max_len = 0;
    int status = R_ST_NORMAL;
    int prev_status = status;
    Str tagbuf = Strnew();
    char *t, *r2;
    int amp_len = 0;

    while (*str) {
	prev_status = status;
	if (next_status(*str, &status)) {
#ifdef USE_M17N
	    len += get_mcwidth(str);
	    n = get_mclen(str);
	}
	else {
	    n = 1;
	}
#else
	    len++;
	}
#endif
	if (status == R_ST_TAG0) {
	    Strclear(tagbuf);
	    PUSH_TAG(str, n);
	}
	else if (status == R_ST_TAG || status == R_ST_DQUOTE
		 || status == R_ST_QUOTE || status == R_ST_EQL
		 || status == R_ST_VALUE) {
	    PUSH_TAG(str, n);
	}
	else if (status == R_ST_AMP) {
	    if (prev_status == R_ST_NORMAL) {
		Strclear(tagbuf);
		len--;
		amp_len = 0;
	    }
	    else {
		PUSH_TAG(str, n);
		amp_len++;
	    }
	}
	else if (status == R_ST_NORMAL && prev_status == R_ST_AMP) {
	    PUSH_TAG(str, n);
	    r2 = tagbuf->ptr;
	    t = getescapecmd(&r2);
	    if (!*r2 && (*t == '\r' || *t == '\n')) {
		if (len > max_len)
		    max_len = len;
		len = 0;
	    }
	    else
		len += get_strwidth(t) + get_strwidth(r2);
	}
	else if (status == R_ST_NORMAL && ST_IS_REAL_TAG(prev_status)) {
	    ;
	}
	else if (*str == '\t') {
	    len--;
	    do {
		len++;
	    } while ((visible_length_offset + len) % Tabstop != 0);
	}
	else if (*str == '\r' || *str == '\n') {
	    len--;
	    if (len > max_len)
		max_len = len;
	    len = 0;
	}
#ifdef USE_M17N
	str += n;
#else
	str++;
#endif
    }
    if (status == R_ST_AMP) {
	r2 = tagbuf->ptr;
	t = getescapecmd(&r2);
	if (*t != '\r' && *t != '\n')
	    len += get_strwidth(t) + get_strwidth(r2);
    }
    return len > max_len ? len : max_len;
}

int
visible_length_plain(char *str)
{
    int len = 0, max_len = 0;

    while (*str) {
	if (*str == '\t') {
	    do {
		len++;
	    } while ((visible_length_offset + len) % Tabstop != 0);
	    str++;
	}
	else if (*str == '\r' || *str == '\n') {
	    if (len > max_len)
		max_len = len;
	    len = 0;
	    str++;
	}
	else {
#ifdef USE_M17N
	    len += get_mcwidth(str);
	    str += get_mclen(str);
#else
	    len++;
	    str++;
#endif
	}
    }
    return len > max_len ? len : max_len;
}

static int
maximum_visible_length(char *str, int offset)
{
    visible_length_offset = offset;
    return visible_length(str);
}

static int
maximum_visible_length_plain(char *str, int offset)
{
    visible_length_offset = offset;
    return visible_length_plain(str);
}

void
align(TextLine *lbuf, int width, int mode)
{
    int i, l, l1, l2;
    Str buf, line = lbuf->line;

    if (line->length == 0) {
	for (i = 0; i < width; i++)
	    Strcat_char(line, ' ');
	lbuf->pos = width;
	return;
    }
    buf = Strnew();
    l = width - lbuf->pos;
    switch (mode) {
    case ALIGN_CENTER:
	l1 = l / 2;
	l2 = l - l1;
	for (i = 0; i < l1; i++)
	    Strcat_char(buf, ' ');
	Strcat(buf, line);
	for (i = 0; i < l2; i++)
	    Strcat_char(buf, ' ');
	break;
    case ALIGN_LEFT:
	Strcat(buf, line);
	for (i = 0; i < l; i++)
	    Strcat_char(buf, ' ');
	break;
    case ALIGN_RIGHT:
	for (i = 0; i < l; i++)
	    Strcat_char(buf, ' ');
	Strcat(buf, line);
	break;
    default:
	return;
    }
    lbuf->line = buf;
    if (lbuf->pos < width)
	lbuf->pos = width;
}

void
print_item(struct table *t, int row, int col, int width, Str buf)
{
    int alignment;
    TextLine *lbuf;

    if (t->tabdata[row])
	lbuf = popTextLine(t->tabdata[row][col]);
    else
	lbuf = NULL;

    if (lbuf != NULL) {
	check_row(t, row);
	alignment = ALIGN_CENTER;
	if ((t->tabattr[row][col] & HTT_ALIGN) == HTT_LEFT)
	    alignment = ALIGN_LEFT;
	else if ((t->tabattr[row][col] & HTT_ALIGN) == HTT_RIGHT)
	    alignment = ALIGN_RIGHT;
	else if ((t->tabattr[row][col] & HTT_ALIGN) == HTT_CENTER)
	    alignment = ALIGN_CENTER;
	align(lbuf, width, alignment);
	Strcat(buf, lbuf->line);
    }
    else {
	lbuf = newTextLine(NULL, 0);
	align(lbuf, width, ALIGN_CENTER);
	Strcat(buf, lbuf->line);
    }
}


#define T_TOP           0
#define T_MIDDLE        1
#define T_BOTTOM        2

void
print_sep(struct table *t, int row, int type, int maxcol, Str buf)
{
    int forbid;
    int rule_mode;
    int i, k, l, m;

    if (row >= 0)
	check_row(t, row);
    check_row(t, row + 1);
    if ((type == T_TOP || type == T_BOTTOM) && t->border_mode == BORDER_THICK) {
	rule_mode = BORDER_THICK;
    }
    else {
	rule_mode = BORDER_THIN;
    }
    forbid = 1;
    if (type == T_TOP)
	forbid |= 2;
    else if (type == T_BOTTOM)
	forbid |= 8;
    else if (t->tabattr[row + 1][0] & HTT_Y) {
	forbid |= 4;
    }
    if (t->border_mode != BORDER_NOWIN) {
	push_symbol(buf, RULE(t->border_mode, forbid), symbol_width, 1);
    }
    for (i = 0; i <= maxcol; i++) {
	forbid = 10;
	if (type != T_BOTTOM && (t->tabattr[row + 1][i] & HTT_Y)) {
	    if (t->tabattr[row + 1][i] & HTT_X) {
		goto do_last_sep;
	    }
	    else {
		for (k = row;
		     k >= 0 && t->tabattr[k] && (t->tabattr[k][i] & HTT_Y);
		     k--) ;
		m = t->tabwidth[i] + 2 * t->cellpadding;
		for (l = i + 1; l <= t->maxcol && (t->tabattr[row][l] & HTT_X);
		     l++)
		    m += t->tabwidth[l] + t->cellspacing;
		print_item(t, k, i, m, buf);
	    }
	}
	else {
	    int w = t->tabwidth[i] + 2 * t->cellpadding;
	    if (RULE_WIDTH == 2)
		w = (w + 1) / RULE_WIDTH;
	    push_symbol(buf, RULE(rule_mode, forbid), symbol_width, w);
	}
      do_last_sep:
	if (i < maxcol) {
	    forbid = 0;
	    if (type == T_TOP)
		forbid |= 2;
	    else if (t->tabattr[row][i + 1] & HTT_X) {
		forbid |= 2;
	    }
	    if (type == T_BOTTOM)
		forbid |= 8;
	    else {
		if (t->tabattr[row + 1][i + 1] & HTT_X) {
		    forbid |= 8;
		}
		if (t->tabattr[row + 1][i + 1] & HTT_Y) {
		    forbid |= 4;
		}
		if (t->tabattr[row + 1][i] & HTT_Y) {
		    forbid |= 1;
		}
	    }
	    if (forbid != 15)	/* forbid==15 means 'no rule at all' */
		push_symbol(buf, RULE(rule_mode, forbid), symbol_width, 1);
	}
    }
    forbid = 4;
    if (type == T_TOP)
	forbid |= 2;
    if (type == T_BOTTOM)
	forbid |= 8;
    if (t->tabattr[row + 1][maxcol] & HTT_Y) {
	forbid |= 1;
    }
    if (t->border_mode != BORDER_NOWIN)
	push_symbol(buf, RULE(t->border_mode, forbid), symbol_width, 1);
}

static int
get_spec_cell_width(struct table *tbl, int row, int col)
{
    int i, w;

    w = tbl->tabwidth[col];
    for (i = col + 1; i <= tbl->maxcol; i++) {
	check_row(tbl, row);
	if (tbl->tabattr[row][i] & HTT_X)
	    w += tbl->tabwidth[i] + tbl->cellspacing;
	else
	    break;
    }
    return w;
}

void
do_refill(struct table *tbl, int row, int col, int maxlimit)
{
    TextList *orgdata;
    TextListItem *l;
    struct readbuffer obuf;
    struct html_feed_environ h_env;
    struct environment envs[MAX_ENV_LEVEL];
    int colspan, icell;

    if (tbl->tabdata[row] == NULL || tbl->tabdata[row][col] == NULL)
	return;
    orgdata = (TextList *)tbl->tabdata[row][col];
    tbl->tabdata[row][col] = newGeneralList();

    init_henv(&h_env, &obuf, envs, MAX_ENV_LEVEL,
	      (TextLineList *)tbl->tabdata[row][col],
	      get_spec_cell_width(tbl, row, col), 0);
    obuf.flag |= RB_INTABLE;
    if (h_env.limit > maxlimit)
	h_env.limit = maxlimit;
    if (tbl->border_mode != BORDER_NONE && tbl->vcellpadding > 0)
	do_blankline(&h_env, &obuf, 0, 0, h_env.limit);
    for (l = orgdata->first; l != NULL; l = l->next) {
	if (TAG_IS(l->ptr, "<table_alt", 10)) {
	    int id = -1;
	    char *p = l->ptr;
	    struct parsed_tag *tag;
	    if ((tag = parse_tag(&p, TRUE)) != NULL)
		parsedtag_get_value(tag, ATTR_TID, &id);
	    if (id >= 0 && id < tbl->ntable && tbl->tables[id].ptr) {
		int alignment;
		TextLineListItem *ti;
		struct table *t = tbl->tables[id].ptr;
		int limit = tbl->tables[id].indent + t->total_width;
		tbl->tables[id].ptr = NULL;
		save_fonteffect(&h_env, h_env.obuf);
		flushline(&h_env, &obuf, 0, 2, h_env.limit);
		if (t->vspace > 0 && !(obuf.flag & RB_IGNORE_P))
		    do_blankline(&h_env, &obuf, 0, 0, h_env.limit);
		if (RB_GET_ALIGN(h_env.obuf) == RB_CENTER)
		    alignment = ALIGN_CENTER;
		else if (RB_GET_ALIGN(h_env.obuf) == RB_RIGHT)
		    alignment = ALIGN_RIGHT;
		else
		    alignment = ALIGN_LEFT;

		if (alignment != ALIGN_LEFT) {
		    for (ti = tbl->tables[id].buf->first;
			 ti != NULL; ti = ti->next)
			align(ti->ptr, h_env.limit, alignment);
		}
		appendTextLineList(h_env.buf, tbl->tables[id].buf);
		if (h_env.maxlimit < limit)
		    h_env.maxlimit = limit;
		restore_fonteffect(&h_env, h_env.obuf);
		obuf.flag &= ~RB_IGNORE_P;
		h_env.blank_lines = 0;
		if (t->vspace > 0) {
		    do_blankline(&h_env, &obuf, 0, 0, h_env.limit);
		    obuf.flag |= RB_IGNORE_P;
		}
	    }
	}
	else
	    HTMLlineproc1(l->ptr, &h_env);
    }
    if (obuf.status != R_ST_NORMAL) {
	obuf.status = R_ST_EOL;
	HTMLlineproc1("\n", &h_env);
    }
    completeHTMLstream(&h_env, &obuf);
    flushline(&h_env, &obuf, 0, 2, h_env.limit);
    if (tbl->border_mode == BORDER_NONE) {
	int rowspan = table_rowspan(tbl, row, col);
	if (row + rowspan <= tbl->maxrow) {
	    if (tbl->vcellpadding > 0 && !(obuf.flag & RB_IGNORE_P))
		do_blankline(&h_env, &obuf, 0, 0, h_env.limit);
	}
	else {
	    if (tbl->vspace > 0)
		purgeline(&h_env);
	}
    }
    else {
	if (tbl->vcellpadding > 0) {
	    if (!(obuf.flag & RB_IGNORE_P))
		do_blankline(&h_env, &obuf, 0, 0, h_env.limit);
	}
	else
	    purgeline(&h_env);
    }
    if ((colspan = table_colspan(tbl, row, col)) > 1) {
	struct table_cell *cell = &tbl->cell;
	int k;
	k = bsearch_2short(colspan, cell->colspan, col, cell->col, MAXCOL,
			   cell->index, cell->maxcell + 1);
	icell = cell->index[k];
	if (cell->minimum_width[icell] < h_env.maxlimit)
	    cell->minimum_width[icell] = h_env.maxlimit;
    }
    else {
	if (tbl->minimum_width[col] < h_env.maxlimit)
	    tbl->minimum_width[col] = h_env.maxlimit;
    }
}

static int
table_rule_width(struct table *t)
{
    if (t->border_mode == BORDER_NONE)
	return 1;
    return RULE_WIDTH;
}

static void
check_cell_width(short *tabwidth, short *cellwidth,
		 short *col, short *colspan, short maxcell,
		 short *indexarray, int space, int dir)
{
    int i, j, k, bcol, ecol;
    int swidth, width;

    for (k = 0; k <= maxcell; k++) {
	j = indexarray[k];
	if (cellwidth[j] <= 0)
	    continue;
	bcol = col[j];
	ecol = bcol + colspan[j];
	swidth = 0;
	for (i = bcol; i < ecol; i++)
	    swidth += tabwidth[i];

	width = cellwidth[j] - (colspan[j] - 1) * space;
	if (width > swidth) {
	    int w = (width - swidth) / colspan[j];
	    int r = (width - swidth) % colspan[j];
	    for (i = bcol; i < ecol; i++)
		tabwidth[i] += w;
	    /* dir {0: horizontal, 1: vertical} */
	    if (dir == 1 && r > 0)
		r = colspan[j];
	    for (i = 1; i <= r; i++)
		tabwidth[ecol - i]++;
	}
    }
}

void
check_minimum_width(struct table *t, short *tabwidth)
{
    int i;
    struct table_cell *cell = &t->cell;

    for (i = 0; i <= t->maxcol; i++) {
	if (tabwidth[i] < t->minimum_width[i])
	    tabwidth[i] = t->minimum_width[i];
    }

    check_cell_width(tabwidth, cell->minimum_width, cell->col, cell->colspan,
		     cell->maxcell, cell->index, t->cellspacing, 0);
}

void
check_maximum_width(struct table *t)
{
    struct table_cell *cell = &t->cell;
#ifdef MATRIX
    int i, j, bcol, ecol;
    int swidth, width;

    cell->necell = 0;
    for (j = 0; j <= cell->maxcell; j++) {
	bcol = cell->col[j];
	ecol = bcol + cell->colspan[j];
	swidth = 0;
	for (i = bcol; i < ecol; i++)
	    swidth += t->tabwidth[i];

	width = cell->width[j] - (cell->colspan[j] - 1) * t->cellspacing;
	if (width > swidth) {
	    cell->eindex[cell->necell] = j;
	    cell->necell++;
	}
    }
#else				/* not MATRIX */
    check_cell_width(t->tabwidth, cell->width, cell->col, cell->colspan,
		     cell->maxcell, cell->index, t->cellspacing, 0);
    check_minimum_width(t, t->tabwidth);
#endif				/* not MATRIX */
}


#ifdef MATRIX
static void
set_integered_width(struct table *t, double *dwidth, short *iwidth)
{
    int i, j, k, n, bcol, ecol, step;
    short *indexarray;
    char *fixed;
    double *mod;
    double sum = 0., x = 0.;
    struct table_cell *cell = &t->cell;
    int rulewidth = table_rule_width(t);

    indexarray = NewAtom_N(short, t->maxcol + 1);
    mod = NewAtom_N(double, t->maxcol + 1);
    for (i = 0; i <= t->maxcol; i++) {
	iwidth[i] = ceil_at_intervals(ceil(dwidth[i]), rulewidth);
	mod[i] = (double)iwidth[i] - dwidth[i];
    }

    sum = 0.;
    for (k = 0; k <= t->maxcol; k++) {
	x = mod[k];
	sum += x;
	i = bsearch_double(x, mod, indexarray, k);
	if (k > i) {
	    int ii;
	    for (ii = k; ii > i; ii--)
		indexarray[ii] = indexarray[ii - 1];
	}
	indexarray[i] = k;
    }

    fixed = NewAtom_N(char, t->maxcol + 1);
    bzero(fixed, t->maxcol + 1);
    for (step = 0; step < 2; step++) {
	for (i = 0; i <= t->maxcol; i += n) {
	    int nn;
	    short *idx;
	    double nsum;
	    if (sum < 0.5)
		return;
	    for (n = 0; i + n <= t->maxcol; n++) {
		int ii = indexarray[i + n];
		if (n == 0)
		    x = mod[ii];
		else if (fabs(mod[ii] - x) > 1e-6)
		    break;
	    }
	    for (k = 0; k < n; k++) {
		int ii = indexarray[i + k];
		if (fixed[ii] < 2 &&
		    iwidth[ii] - rulewidth < t->minimum_width[ii])
		    fixed[ii] = 2;
		if (fixed[ii] < 1 &&
		    iwidth[ii] - rulewidth < t->tabwidth[ii] &&
		    (double)rulewidth - mod[ii] > 0.5)
		    fixed[ii] = 1;
	    }
	    idx = NewAtom_N(short, n);
	    for (k = 0; k < cell->maxcell; k++) {
		int kk, w, width, m;
		j = cell->index[k];
		bcol = cell->col[j];
		ecol = bcol + cell->colspan[j];
		m = 0;
		for (kk = 0; kk < n; kk++) {
		    int ii = indexarray[i + kk];
		    if (ii >= bcol && ii < ecol) {
			idx[m] = ii;
			m++;
		    }
		}
		if (m == 0)
		    continue;
		width = (cell->colspan[j] - 1) * t->cellspacing;
		for (kk = bcol; kk < ecol; kk++)
		    width += iwidth[kk];
		w = 0;
		for (kk = 0; kk < m; kk++) {
		    if (fixed[(int)idx[kk]] < 2)
			w += rulewidth;
		}
		if (width - w < cell->minimum_width[j]) {
		    for (kk = 0; kk < m; kk++) {
			if (fixed[(int)idx[kk]] < 2)
			    fixed[(int)idx[kk]] = 2;
		    }
		}
		w = 0;
		for (kk = 0; kk < m; kk++) {
		    if (fixed[(int)idx[kk]] < 1 &&
			(double)rulewidth - mod[(int)idx[kk]] > 0.5)
			w += rulewidth;
		}
		if (width - w < cell->width[j]) {
		    for (kk = 0; kk < m; kk++) {
			if (fixed[(int)idx[kk]] < 1 &&
			    (double)rulewidth - mod[(int)idx[kk]] > 0.5)
			    fixed[(int)idx[kk]] = 1;
		    }
		}
	    }
	    nn = 0;
	    for (k = 0; k < n; k++) {
		int ii = indexarray[i + k];
		if (fixed[ii] <= step)
		    nn++;
	    }
	    nsum = sum - (double)(nn * rulewidth);
	    if (nsum < 0. && fabs(sum) <= fabs(nsum))
		return;
	    for (k = 0; k < n; k++) {
		int ii = indexarray[i + k];
		if (fixed[ii] <= step) {
		    iwidth[ii] -= rulewidth;
		    fixed[ii] = 3;
		}
	    }
	    sum = nsum;
	}
    }
}

static double
correlation_coefficient(double sxx, double syy, double sxy)
{
    double coe, tmp;
    tmp = sxx * syy;
    if (tmp < Tiny)
	tmp = Tiny;
    coe = sxy / sqrt(tmp);
    if (coe > 1.)
	return 1.;
    if (coe < -1.)
	return -1.;
    return coe;
}

static double
correlation_coefficient2(double sxx, double syy, double sxy)
{
    double coe, tmp;
    tmp = (syy + sxx - 2 * sxy) * sxx;
    if (tmp < Tiny)
	tmp = Tiny;
    coe = (sxx - sxy) / sqrt(tmp);
    if (coe > 1.)
	return 1.;
    if (coe < -1.)
	return -1.;
    return coe;
}

static double
recalc_width(double old, double swidth, int cwidth,
	     double sxx, double syy, double sxy, int is_inclusive)
{
    double delta = swidth - (double)cwidth;
    double rat = sxy / sxx,
	coe = correlation_coefficient(sxx, syy, sxy), w, ww;
    if (old < 0.)
	old = 0.;
    if (fabs(coe) < 1e-5)
	return old;
    w = rat * old;
    ww = delta;
    if (w > 0.) {
	double wmin = 5e-3 * sqrt(syy * (1. - coe * coe));
	if (swidth < 0.2 && cwidth > 0 && is_inclusive) {
	    double coe1 = correlation_coefficient2(sxx, syy, sxy);
	    if (coe > 0.9 || coe1 > 0.9)
		return 0.;
	}
	if (wmin > 0.05)
	    wmin = 0.05;
	if (ww < 0.)
	    ww = 0.;
	ww += wmin;
    }
    else {
	double wmin = 5e-3 * sqrt(syy) * fabs(coe);
	if (rat > -0.001)
	    return old;
	if (wmin > 0.01)
	    wmin = 0.01;
	if (ww > 0.)
	    ww = 0.;
	ww -= wmin;
    }
    if (w > ww)
	return ww / rat;
    return old;
}

static int
check_compressible_cell(struct table *t, MAT * minv,
			double *newwidth, double *swidth, short *cwidth,
			double totalwidth, double *Sxx,
			int icol, int icell, double sxx, int corr)
{
    struct table_cell *cell = &t->cell;
    int i, j, k, m, bcol, ecol, span;
    double delta, owidth;
    double dmax, dmin, sxy;
    int rulewidth = table_rule_width(t);

    if (sxx < 10.)
	return corr;

    if (icol >= 0) {
	owidth = newwidth[icol];
	delta = newwidth[icol] - (double)t->tabwidth[icol];
	bcol = icol;
	ecol = bcol + 1;
    }
    else if (icell >= 0) {
	owidth = swidth[icell];
	delta = swidth[icell] - (double)cwidth[icell];
	bcol = cell->col[icell];
	ecol = bcol + cell->colspan[icell];
    }
    else {
	owidth = totalwidth;
	delta = totalwidth;
	bcol = 0;
	ecol = t->maxcol + 1;
    }

    dmin = delta;
    dmax = -1.;
    for (k = 0; k <= cell->maxcell; k++) {
	int bcol1, ecol1;
	int is_inclusive = 0;
	if (dmin <= 0.)
	    goto _end;
	j = cell->index[k];
	if (j == icell)
	    continue;
	bcol1 = cell->col[j];
	ecol1 = bcol1 + cell->colspan[j];
	sxy = 0.;
	for (m = bcol1; m < ecol1; m++) {
	    for (i = bcol; i < ecol; i++)
		sxy += m_entry(minv, i, m);
	}
	if (bcol1 >= bcol && ecol1 <= ecol) {
	    is_inclusive = 1;
	}
	if (sxy > 0.)
	    dmin = recalc_width(dmin, swidth[j], cwidth[j],
				sxx, Sxx[j], sxy, is_inclusive);
	else
	    dmax = recalc_width(dmax, swidth[j], cwidth[j],
				sxx, Sxx[j], sxy, is_inclusive);
    }
    for (m = 0; m <= t->maxcol; m++) {
	int is_inclusive = 0;
	if (dmin <= 0.)
	    goto _end;
	if (m == icol)
	    continue;
	sxy = 0.;
	for (i = bcol; i < ecol; i++)
	    sxy += m_entry(minv, i, m);
	if (m >= bcol && m < ecol) {
	    is_inclusive = 1;
	}
	if (sxy > 0.)
	    dmin = recalc_width(dmin, newwidth[m], t->tabwidth[m],
				sxx, m_entry(minv, m, m), sxy, is_inclusive);
	else
	    dmax = recalc_width(dmax, newwidth[m], t->tabwidth[m],
				sxx, m_entry(minv, m, m), sxy, is_inclusive);
    }
  _end:
    if (dmax > 0. && dmin > dmax)
	dmin = dmax;
    span = ecol - bcol;
    if ((span == t->maxcol + 1 && dmin >= 0.) ||
	(span != t->maxcol + 1 && dmin > rulewidth * 0.5)) {
	int nwidth = ceil_at_intervals(round(owidth - dmin), rulewidth);
	correct_table_matrix(t, bcol, ecol - bcol, nwidth, 1.);
	corr++;
    }
    return corr;
}

#define MAX_ITERATION 10
int
check_table_width(struct table *t, double *newwidth, MAT * minv, int itr)
{
    int i, j, k, m, bcol, ecol;
    int corr = 0;
    struct table_cell *cell = &t->cell;
#ifdef __GNUC__
    short orgwidth[t->maxcol + 1], corwidth[t->maxcol + 1];
    short cwidth[cell->maxcell + 1];
    double swidth[cell->maxcell + 1];
#else				/* __GNUC__ */
    short orgwidth[MAXCOL], corwidth[MAXCOL];
    short cwidth[MAXCELL];
    double swidth[MAXCELL];
#endif				/* __GNUC__ */
    double twidth, sxy, *Sxx, stotal;

    twidth = 0.;
    stotal = 0.;
    for (i = 0; i <= t->maxcol; i++) {
	twidth += newwidth[i];
	stotal += m_entry(minv, i, i);
	for (m = 0; m < i; m++) {
	    stotal += 2 * m_entry(minv, i, m);
	}
    }

    Sxx = NewAtom_N(double, cell->maxcell + 1);
    for (k = 0; k <= cell->maxcell; k++) {
	j = cell->index[k];
	bcol = cell->col[j];
	ecol = bcol + cell->colspan[j];
	swidth[j] = 0.;
	for (i = bcol; i < ecol; i++)
	    swidth[j] += newwidth[i];
	cwidth[j] = cell->width[j] - (cell->colspan[j] - 1) * t->cellspacing;
	Sxx[j] = 0.;
	for (i = bcol; i < ecol; i++) {
	    Sxx[j] += m_entry(minv, i, i);
	    for (m = bcol; m <= ecol; m++) {
		if (m < i)
		    Sxx[j] += 2 * m_entry(minv, i, m);
	    }
	}
    }

    /* compress table */
    corr = check_compressible_cell(t, minv, newwidth, swidth,
				   cwidth, twidth, Sxx, -1, -1, stotal, corr);
    if (itr < MAX_ITERATION && corr > 0)
	return corr;

    /* compress multicolumn cell */
    for (k = cell->maxcell; k >= 0; k--) {
	j = cell->index[k];
	corr = check_compressible_cell(t, minv, newwidth, swidth,
				       cwidth, twidth, Sxx,
				       -1, j, Sxx[j], corr);
	if (itr < MAX_ITERATION && corr > 0)
	    return corr;
    }

    /* compress single column cell */
    for (i = 0; i <= t->maxcol; i++) {
	corr = check_compressible_cell(t, minv, newwidth, swidth,
				       cwidth, twidth, Sxx,
				       i, -1, m_entry(minv, i, i), corr);
	if (itr < MAX_ITERATION && corr > 0)
	    return corr;
    }


    for (i = 0; i <= t->maxcol; i++)
	corwidth[i] = orgwidth[i] = round(newwidth[i]);

    check_minimum_width(t, corwidth);

    for (i = 0; i <= t->maxcol; i++) {
	double sx = sqrt(m_entry(minv, i, i));
	if (sx < 0.1)
	    continue;
	if (orgwidth[i] < t->minimum_width[i] &&
	    corwidth[i] == t->minimum_width[i]) {
	    double w = (sx > 0.5) ? 0.5 : sx * 0.2;
	    sxy = 0.;
	    for (m = 0; m <= t->maxcol; m++) {
		if (m == i)
		    continue;
		sxy += m_entry(minv, i, m);
	    }
	    if (sxy <= 0.) {
		correct_table_matrix(t, i, 1, t->minimum_width[i], w);
		corr++;
	    }
	}
    }

    for (k = 0; k <= cell->maxcell; k++) {
	int nwidth = 0, mwidth;
	double sx;

	j = cell->index[k];
	sx = sqrt(Sxx[j]);
	if (sx < 0.1)
	    continue;
	bcol = cell->col[j];
	ecol = bcol + cell->colspan[j];
	for (i = bcol; i < ecol; i++)
	    nwidth += corwidth[i];
	mwidth =
	    cell->minimum_width[j] - (cell->colspan[j] - 1) * t->cellspacing;
	if (mwidth > swidth[j] && mwidth == nwidth) {
	    double w = (sx > 0.5) ? 0.5 : sx * 0.2;

	    sxy = 0.;
	    for (i = bcol; i < ecol; i++) {
		for (m = 0; m <= t->maxcol; m++) {
		    if (m >= bcol && m < ecol)
			continue;
		    sxy += m_entry(minv, i, m);
		}
	    }
	    if (sxy <= 0.) {
		correct_table_matrix(t, bcol, cell->colspan[j], mwidth, w);
		corr++;
	    }
	}
    }

    if (itr >= MAX_ITERATION)
	return 0;
    else
	return corr;
}

#else				/* not MATRIX */
void
set_table_width(struct table *t, short *newwidth, int maxwidth)
{
    int i, j, k, bcol, ecol;
    struct table_cell *cell = &t->cell;
    char *fixed;
    int swidth, fwidth, width, nvar;
    double s;
    double *dwidth;
    int try_again;

    fixed = NewAtom_N(char, t->maxcol + 1);
    bzero(fixed, t->maxcol + 1);
    dwidth = NewAtom_N(double, t->maxcol + 1);

    for (i = 0; i <= t->maxcol; i++) {
	dwidth[i] = 0.0;
	if (t->fixed_width[i] < 0) {
	    t->fixed_width[i] = -t->fixed_width[i] * maxwidth / 100;
	}
	if (t->fixed_width[i] > 0) {
	    newwidth[i] = t->fixed_width[i];
	    fixed[i] = 1;
	}
	else
	    newwidth[i] = 0;
	if (newwidth[i] < t->minimum_width[i])
	    newwidth[i] = t->minimum_width[i];
    }

    for (k = 0; k <= cell->maxcell; k++) {
	j = cell->indexarray[k];
	bcol = cell->col[j];
	ecol = bcol + cell->colspan[j];

	if (cell->fixed_width[j] < 0)
	    cell->fixed_width[j] = -cell->fixed_width[j] * maxwidth / 100;

	swidth = 0;
	fwidth = 0;
	nvar = 0;
	for (i = bcol; i < ecol; i++) {
	    if (fixed[i]) {
		fwidth += newwidth[i];
	    }
	    else {
		swidth += newwidth[i];
		nvar++;
	    }
	}
	width = max(cell->fixed_width[j], cell->minimum_width[j])
	    - (cell->colspan[j] - 1) * t->cellspacing;
	if (nvar > 0 && width > fwidth + swidth) {
	    s = 0.;
	    for (i = bcol; i < ecol; i++) {
		if (!fixed[i])
		    s += weight3(t->tabwidth[i]);
	    }
	    for (i = bcol; i < ecol; i++) {
		if (!fixed[i])
		    dwidth[i] = (width - fwidth) * weight3(t->tabwidth[i]) / s;
		else
		    dwidth[i] = (double)newwidth[i];
	    }
	    dv2sv(dwidth, newwidth, cell->colspan[j]);
	    if (cell->fixed_width[j] > 0) {
		for (i = bcol; i < ecol; i++)
		    fixed[i] = 1;
	    }
	}
    }

    do {
	nvar = 0;
	swidth = 0;
	fwidth = 0;
	for (i = 0; i <= t->maxcol; i++) {
	    if (fixed[i]) {
		fwidth += newwidth[i];
	    }
	    else {
		swidth += newwidth[i];
		nvar++;
	    }
	}
	width = maxwidth - t->maxcol * t->cellspacing;
	if (nvar == 0 || width <= fwidth + swidth)
	    break;

	s = 0.;
	for (i = 0; i <= t->maxcol; i++) {
	    if (!fixed[i])
		s += weight3(t->tabwidth[i]);
	}
	for (i = 0; i <= t->maxcol; i++) {
	    if (!fixed[i])
		dwidth[i] = (width - fwidth) * weight3(t->tabwidth[i]) / s;
	    else
		dwidth[i] = (double)newwidth[i];
	}
	dv2sv(dwidth, newwidth, t->maxcol + 1);

	try_again = 0;
	for (i = 0; i <= t->maxcol; i++) {
	    if (!fixed[i]) {
		if (newwidth[i] > t->tabwidth[i]) {
		    newwidth[i] = t->tabwidth[i];
		    fixed[i] = 1;
		    try_again = 1;
		}
		else if (newwidth[i] < t->minimum_width[i]) {
		    newwidth[i] = t->minimum_width[i];
		    fixed[i] = 1;
		    try_again = 1;
		}
	    }
	}
    } while (try_again);
}
#endif				/* not MATRIX */

void
check_table_height(struct table *t)
{
    int i, j, k;
    struct {
	short *row;
	short *rowspan;
	short *indexarray;
	short maxcell;
	short size;
	short *height;
    } cell;
    int space = 0;

    cell.size = 0;
    cell.maxcell = -1;

    for (j = 0; j <= t->maxrow; j++) {
	if (!t->tabattr[j])
	    continue;
	for (i = 0; i <= t->maxcol; i++) {
	    int t_dep, rowspan;
	    if (t->tabattr[j][i] & (HTT_X | HTT_Y))
		continue;

	    if (t->tabdata[j][i] == NULL)
		t_dep = 0;
	    else
		t_dep = t->tabdata[j][i]->nitem;

	    rowspan = table_rowspan(t, j, i);
	    if (rowspan > 1) {
		int c = cell.maxcell + 1;
		k = bsearch_2short(rowspan, cell.rowspan,
				   j, cell.row, t->maxrow + 1, cell.indexarray,
				   c);
		if (k <= cell.maxcell) {
		    int idx = cell.indexarray[k];
		    if (cell.row[idx] == j && cell.rowspan[idx] == rowspan)
			c = idx;
		}
		if (c >= MAXROWCELL)
		    continue;
		if (c >= cell.size) {
		    if (cell.size == 0) {
			cell.size = max(MAXCELL, c + 1);
			cell.row = NewAtom_N(short, cell.size);
			cell.rowspan = NewAtom_N(short, cell.size);
			cell.indexarray = NewAtom_N(short, cell.size);
			cell.height = NewAtom_N(short, cell.size);
		    }
		    else {
			cell.size = max(cell.size + MAXCELL, c + 1);
			cell.row = New_Reuse(short, cell.row, cell.size);
			cell.rowspan = New_Reuse(short, cell.rowspan,
						 cell.size);
			cell.indexarray = New_Reuse(short, cell.indexarray,
						    cell.size);
			cell.height = New_Reuse(short, cell.height, cell.size);
		    }
		}
		if (c > cell.maxcell) {
		    cell.maxcell++;
		    cell.row[cell.maxcell] = j;
		    cell.rowspan[cell.maxcell] = rowspan;
		    cell.height[cell.maxcell] = 0;
		    if (cell.maxcell > k) {
			int ii;
			for (ii = cell.maxcell; ii > k; ii--)
			    cell.indexarray[ii] = cell.indexarray[ii - 1];
		    }
		    cell.indexarray[k] = cell.maxcell;
		}

		if (cell.height[c] < t_dep)
		    cell.height[c] = t_dep;
		continue;
	    }
	    if (t->tabheight[j] < t_dep)
		t->tabheight[j] = t_dep;
	}
    }

    switch (t->border_mode) {
    case BORDER_THIN:
    case BORDER_THICK:
    case BORDER_NOWIN:
	space = 1;
	break;
    case BORDER_NONE:
	space = 0;
    }
    check_cell_width(t->tabheight, cell.height, cell.row, cell.rowspan,
		     cell.maxcell, cell.indexarray, space, 1);
}

#define CHECK_MINIMUM	1
#define CHECK_FIXED	2

int
get_table_width(struct table *t, short *orgwidth, short *cellwidth, int flag)
{
#ifdef __GNUC__
    short newwidth[t->maxcol + 1];
#else				/* not __GNUC__ */
    short newwidth[MAXCOL];
#endif				/* not __GNUC__ */
    int i;
    int swidth;
    struct table_cell *cell = &t->cell;
    int rulewidth = table_rule_width(t);

    for (i = 0; i <= t->maxcol; i++)
	newwidth[i] = max(orgwidth[i], 0);

    if (flag & CHECK_FIXED) {
#ifdef __GNUC__
	short ccellwidth[cell->maxcell + 1];
#else				/* not __GNUC__ */
	short ccellwidth[MAXCELL];
#endif				/* not __GNUC__ */
	for (i = 0; i <= t->maxcol; i++) {
	    if (newwidth[i] < t->fixed_width[i])
		newwidth[i] = t->fixed_width[i];
	}
	for (i = 0; i <= cell->maxcell; i++) {
	    ccellwidth[i] = cellwidth[i];
	    if (ccellwidth[i] < cell->fixed_width[i])
		ccellwidth[i] = cell->fixed_width[i];
	}
	check_cell_width(newwidth, ccellwidth, cell->col, cell->colspan,
			 cell->maxcell, cell->index, t->cellspacing, 0);
    }
    else {
	check_cell_width(newwidth, cellwidth, cell->col, cell->colspan,
			 cell->maxcell, cell->index, t->cellspacing, 0);
    }
    if (flag & CHECK_MINIMUM)
	check_minimum_width(t, newwidth);

    swidth = 0;
    for (i = 0; i <= t->maxcol; i++) {
	swidth += ceil_at_intervals(newwidth[i], rulewidth);
    }
    swidth += table_border_width(t);
    return swidth;
}

#define minimum_table_width(t)\
(get_table_width(t,t->minimum_width,t->cell.minimum_width,0))
#define maximum_table_width(t)\
  (get_table_width(t,t->tabwidth,t->cell.width,CHECK_FIXED))
#define fixed_table_width(t)\
  (get_table_width(t,t->fixed_width,t->cell.fixed_width,CHECK_MINIMUM))

#define MAX_COTABLE_LEVEL 100
static int cotable_level;

void
initRenderTable(void)
{
    cotable_level = 0;
}

void
renderCoTable(struct table *tbl, int maxlimit)
{
    struct readbuffer obuf;
    struct html_feed_environ h_env;
    struct environment envs[MAX_ENV_LEVEL];
    struct table *t;
    int i, col, row;
    int indent, maxwidth;

    if (cotable_level >= MAX_COTABLE_LEVEL)
	return;	/* workaround to prevent infinite recursion */
    cotable_level++;

    for (i = 0; i < tbl->ntable; i++) {
	t = tbl->tables[i].ptr;
	if (t == NULL)
	    continue;
	col = tbl->tables[i].col;
	row = tbl->tables[i].row;
	indent = tbl->tables[i].indent;

	init_henv(&h_env, &obuf, envs, MAX_ENV_LEVEL, tbl->tables[i].buf,
		  get_spec_cell_width(tbl, row, col), indent);
	check_row(tbl, row);
	if (h_env.limit > maxlimit)
	    h_env.limit = maxlimit;
	if (t->total_width == 0)
	    maxwidth = h_env.limit - indent;
	else if (t->total_width > 0)
	    maxwidth = t->total_width;
	else
	    maxwidth = t->total_width = -t->total_width * h_env.limit / 100;
	renderTable(t, maxwidth, &h_env);
    }
}

static void
make_caption(struct table *t, struct html_feed_environ *h_env)
{
    struct html_feed_environ henv;
    struct readbuffer obuf;
    struct environment envs[MAX_ENV_LEVEL];
    int limit;

    if (t->caption->length <= 0)
	return;

    if (t->total_width > 0)
	limit = t->total_width;
    else
	limit = h_env->limit;
    init_henv(&henv, &obuf, envs, MAX_ENV_LEVEL, newTextLineList(),
	      limit, h_env->envs[h_env->envc].indent);
    HTMLlineproc1("<center>", &henv);
    HTMLlineproc0(t->caption->ptr, &henv, FALSE);
    HTMLlineproc1("</center>", &henv);

    if (t->total_width < henv.maxlimit)
	t->total_width = henv.maxlimit;
    limit = h_env->limit;
    h_env->limit = t->total_width;
    HTMLlineproc1("<center>", h_env);
    HTMLlineproc0(t->caption->ptr, h_env, FALSE);
    HTMLlineproc1("</center>", h_env);
    h_env->limit = limit;
}

void
renderTable(struct table *t, int max_width, struct html_feed_environ *h_env)
{
    int i, j, w, r, h;
    Str renderbuf;
    short new_tabwidth[MAXCOL] = { 0 };
#ifdef MATRIX
    int itr;
    VEC *newwidth;
    MAT *mat, *minv;
    PERM *pivot;
#endif				/* MATRIX */
    int width;
    int rulewidth;
    Str vrulea = NULL, vruleb = NULL, vrulec = NULL;
#ifdef ID_EXT
    Str idtag;
#endif				/* ID_EXT */

    t->total_height = 0;
    if (t->maxcol < 0) {
	make_caption(t, h_env);
	return;
    }

    if (t->sloppy_width > max_width)
	max_width = t->sloppy_width;

    rulewidth = table_rule_width(t);

    max_width -= table_border_width(t);

    if (rulewidth > 1)
	max_width = floor_at_intervals(max_width, rulewidth);

    if (max_width < rulewidth)
	max_width = rulewidth;

#define MAX_TABWIDTH 10000
    if (max_width > MAX_TABWIDTH)
	max_width = MAX_TABWIDTH;

    check_maximum_width(t);

#ifdef MATRIX
    if (t->maxcol == 0) {
	if (t->tabwidth[0] > max_width)
	    t->tabwidth[0] = max_width;
	if (t->total_width > 0)
	    t->tabwidth[0] = max_width;
	else if (t->fixed_width[0] > 0)
	    t->tabwidth[0] = t->fixed_width[0];
	if (t->tabwidth[0] < t->minimum_width[0])
	    t->tabwidth[0] = t->minimum_width[0];
    }
    else {
	set_table_matrix(t, max_width);

	itr = 0;
	mat = m_get(t->maxcol + 1, t->maxcol + 1);
	pivot = px_get(t->maxcol + 1);
	newwidth = v_get(t->maxcol + 1);
	minv = m_get(t->maxcol + 1, t->maxcol + 1);
	do {
	    m_copy(t->matrix, mat);
	    LUfactor(mat, pivot);
	    LUsolve(mat, pivot, t->vector, newwidth);
	    LUinverse(mat, pivot, minv);
#ifdef TABLE_DEBUG
	    set_integered_width(t, newwidth->ve, new_tabwidth);
	    fprintf(stderr, "itr=%d\n", itr);
	    fprintf(stderr, "max_width=%d\n", max_width);
	    fprintf(stderr, "minimum : ");
	    for (i = 0; i <= t->maxcol; i++)
		fprintf(stderr, "%2d ", t->minimum_width[i]);
	    fprintf(stderr, "\nfixed : ");
	    for (i = 0; i <= t->maxcol; i++)
		fprintf(stderr, "%2d ", t->fixed_width[i]);
	    fprintf(stderr, "\ndecided : ");
	    for (i = 0; i <= t->maxcol; i++)
		fprintf(stderr, "%2d ", new_tabwidth[i]);
	    fprintf(stderr, "\n");
#endif				/* TABLE_DEBUG */
	    itr++;

	} while (check_table_width(t, newwidth->ve, minv, itr));
	set_integered_width(t, newwidth->ve, new_tabwidth);
	check_minimum_width(t, new_tabwidth);
	v_free(newwidth);
	px_free(pivot);
	m_free(mat);
	m_free(minv);
	m_free(t->matrix);
	v_free(t->vector);
	for (i = 0; i <= t->maxcol; i++) {
	    t->tabwidth[i] = new_tabwidth[i];
	}
    }
#else				/* not MATRIX */
    set_table_width(t, new_tabwidth, max_width);
    for (i = 0; i <= t->maxcol; i++) {
	t->tabwidth[i] = new_tabwidth[i];
    }
#endif				/* not MATRIX */

    check_minimum_width(t, t->tabwidth);
    for (i = 0; i <= t->maxcol; i++)
	t->tabwidth[i] = ceil_at_intervals(t->tabwidth[i], rulewidth);

    renderCoTable(t, h_env->limit);

    for (i = 0; i <= t->maxcol; i++) {
	for (j = 0; j <= t->maxrow; j++) {
	    check_row(t, j);
	    if (t->tabattr[j][i] & HTT_Y)
		continue;
	    do_refill(t, j, i, h_env->limit);
	}
    }

    check_minimum_width(t, t->tabwidth);
    t->total_width = 0;
    for (i = 0; i <= t->maxcol; i++) {
	t->tabwidth[i] = ceil_at_intervals(t->tabwidth[i], rulewidth);
	t->total_width += t->tabwidth[i];
    }

    t->total_width += table_border_width(t);

    check_table_height(t);

    for (i = 0; i <= t->maxcol; i++) {
	for (j = 0; j <= t->maxrow; j++) {
	    TextLineList *l;
	    int k;
	    if ((t->tabattr[j][i] & HTT_Y) ||
		(t->tabattr[j][i] & HTT_TOP) || (t->tabdata[j][i] == NULL))
		continue;
	    h = t->tabheight[j];
	    for (k = j + 1; k <= t->maxrow; k++) {
		if (!(t->tabattr[k][i] & HTT_Y))
		    break;
		h += t->tabheight[k];
		switch (t->border_mode) {
		case BORDER_THIN:
		case BORDER_THICK:
		case BORDER_NOWIN:
		    h += 1;
		    break;
		}
	    }
	    h -= t->tabdata[j][i]->nitem;
	    if (t->tabattr[j][i] & HTT_MIDDLE)
		h /= 2;
	    if (h <= 0)
		continue;
	    l = newTextLineList();
	    for (k = 0; k < h; k++)
		pushTextLine(l, newTextLine(NULL, 0));
	    t->tabdata[j][i] = appendGeneralList((GeneralList *)l,
						 t->tabdata[j][i]);
	}
    }

    /* table output */
    width = t->total_width;

    make_caption(t, h_env);

    HTMLlineproc1("<pre for_table>", h_env);
#ifdef ID_EXT
    if (t->id != NULL) {
	idtag = Sprintf("<_id id=\"%s\">", html_quote((t->id)->ptr));
	HTMLlineproc1(idtag->ptr, h_env);
    }
#endif				/* ID_EXT */
    switch (t->border_mode) {
    case BORDER_THIN:
    case BORDER_THICK:
	renderbuf = Strnew();
	print_sep(t, -1, T_TOP, t->maxcol, renderbuf);
	push_render_image(renderbuf, width, t->total_width, h_env);
	t->total_height += 1;
	break;
    }
    vruleb = Strnew();
    switch (t->border_mode) {
    case BORDER_THIN:
    case BORDER_THICK:
	vrulea = Strnew();
	vrulec = Strnew();
	push_symbol(vrulea, TK_VERTICALBAR(t->border_mode), symbol_width, 1);
	for (i = 0; i < t->cellpadding; i++) {
	    Strcat_char(vrulea, ' ');
	    Strcat_char(vruleb, ' ');
	    Strcat_char(vrulec, ' ');
	}
	push_symbol(vrulec, TK_VERTICALBAR(t->border_mode), symbol_width, 1);
    case BORDER_NOWIN:
	push_symbol(vruleb, TK_VERTICALBAR(BORDER_THIN), symbol_width, 1);
	for (i = 0; i < t->cellpadding; i++)
	    Strcat_char(vruleb, ' ');
	break;
    case BORDER_NONE:
	for (i = 0; i < t->cellspacing; i++)
	    Strcat_char(vruleb, ' ');
    }

    for (r = 0; r <= t->maxrow; r++) {
	for (h = 0; h < t->tabheight[r]; h++) {
	    renderbuf = Strnew();
	    if (t->border_mode == BORDER_THIN
		|| t->border_mode == BORDER_THICK)
		Strcat(renderbuf, vrulea);
#ifdef ID_EXT
	    if (t->tridvalue[r] != NULL && h == 0) {
		idtag = Sprintf("<_id id=\"%s\">",
				html_quote((t->tridvalue[r])->ptr));
		Strcat(renderbuf, idtag);
	    }
#endif				/* ID_EXT */
	    for (i = 0; i <= t->maxcol; i++) {
		check_row(t, r);
#ifdef ID_EXT
		if (t->tabidvalue[r][i] != NULL && h == 0) {
		    idtag = Sprintf("<_id id=\"%s\">",
				    html_quote((t->tabidvalue[r][i])->ptr));
		    Strcat(renderbuf, idtag);
		}
#endif				/* ID_EXT */
		if (!(t->tabattr[r][i] & HTT_X)) {
		    w = t->tabwidth[i];
		    for (j = i + 1;
			 j <= t->maxcol && (t->tabattr[r][j] & HTT_X); j++)
			w += t->tabwidth[j] + t->cellspacing;
		    if (t->tabattr[r][i] & HTT_Y) {
			for (j = r - 1; j >= 0 && t->tabattr[j]
			     && (t->tabattr[j][i] & HTT_Y); j--) ;
			print_item(t, j, i, w, renderbuf);
		    }
		    else
			print_item(t, r, i, w, renderbuf);
		}
		if (i < t->maxcol && !(t->tabattr[r][i + 1] & HTT_X))
		    Strcat(renderbuf, vruleb);
	    }
	    switch (t->border_mode) {
	    case BORDER_THIN:
	    case BORDER_THICK:
		Strcat(renderbuf, vrulec);
		t->total_height += 1;
		break;
	    }
	    push_render_image(renderbuf, width, t->total_width, h_env);
	}
	if (r < t->maxrow && t->border_mode != BORDER_NONE) {
	    renderbuf = Strnew();
	    print_sep(t, r, T_MIDDLE, t->maxcol, renderbuf);
	    push_render_image(renderbuf, width, t->total_width, h_env);
	}
	t->total_height += t->tabheight[r];
    }
    switch (t->border_mode) {
    case BORDER_THIN:
    case BORDER_THICK:
	renderbuf = Strnew();
	print_sep(t, t->maxrow, T_BOTTOM, t->maxcol, renderbuf);
	push_render_image(renderbuf, width, t->total_width, h_env);
	t->total_height += 1;
	break;
    }
    if (t->total_height == 0) {
       renderbuf = Strnew_charp(" ");
	t->total_height++;
	t->total_width = 1;
	push_render_image(renderbuf, 1, t->total_width, h_env);
    }
    HTMLlineproc1("</pre>", h_env);
}

#ifdef TABLE_NO_COMPACT
#define THR_PADDING 2
#else
#define THR_PADDING 4
#endif

struct table *
begin_table(int border, int spacing, int padding, int vspace)
{
    struct table *t;
    int mincell = minimum_cellspacing(border);
    int rcellspacing;
    int mincell_pixels = round(mincell * pixel_per_char);
    int ppc = round(pixel_per_char);

    t = newTable();
    t->row = t->col = -1;
    t->maxcol = -1;
    t->maxrow = -1;
    t->border_mode = border;
    t->flag = 0;
    if (border == BORDER_NOWIN)
	t->flag |= TBL_EXPAND_OK;

    rcellspacing = spacing + 2 * padding;
    switch (border) {
    case BORDER_THIN:
    case BORDER_THICK:
    case BORDER_NOWIN:
	t->cellpadding = padding - (mincell_pixels - 4) / 2;
	break;
    case BORDER_NONE:
	t->cellpadding = rcellspacing - mincell_pixels;
    }
    if (t->cellpadding >= ppc)
	t->cellpadding /= ppc;
    else if (t->cellpadding > 0)
	t->cellpadding = 1;
    else
	t->cellpadding = 0;

    switch (border) {
    case BORDER_THIN:
    case BORDER_THICK:
    case BORDER_NOWIN:
	t->cellspacing = 2 * t->cellpadding + mincell;
	break;
    case BORDER_NONE:
	t->cellspacing = t->cellpadding + mincell;
    }

    if (border == BORDER_NONE) {
	if (rcellspacing / 2 + vspace <= 1)
	    t->vspace = 0;
	else
	    t->vspace = 1;
    }
    else {
	if (vspace < ppc)
	    t->vspace = 0;
	else
	    t->vspace = 1;
    }

    if (border == BORDER_NONE) {
	if (rcellspacing <= THR_PADDING)
	    t->vcellpadding = 0;
	else
	    t->vcellpadding = 1;
    }
    else {
	if (padding < 2 * ppc - 2)
	    t->vcellpadding = 0;
	else
	    t->vcellpadding = 1;
    }

    return t;
}

void
end_table(struct table *tbl)
{
    struct table_cell *cell = &tbl->cell;
    int i, rulewidth = table_rule_width(tbl);
    if (rulewidth > 1) {
	if (tbl->total_width > 0)
	    tbl->total_width = ceil_at_intervals(tbl->total_width, rulewidth);
	for (i = 0; i <= tbl->maxcol; i++) {
	    tbl->minimum_width[i] =
		ceil_at_intervals(tbl->minimum_width[i], rulewidth);
	    tbl->tabwidth[i] = ceil_at_intervals(tbl->tabwidth[i], rulewidth);
	    if (tbl->fixed_width[i] > 0)
		tbl->fixed_width[i] =
		    ceil_at_intervals(tbl->fixed_width[i], rulewidth);
	}
	for (i = 0; i <= cell->maxcell; i++) {
	    cell->minimum_width[i] =
		ceil_at_intervals(cell->minimum_width[i], rulewidth);
	    cell->width[i] = ceil_at_intervals(cell->width[i], rulewidth);
	    if (cell->fixed_width[i] > 0)
		cell->fixed_width[i] =
		    ceil_at_intervals(cell->fixed_width[i], rulewidth);
	}
    }
    tbl->sloppy_width = fixed_table_width(tbl);
    if (tbl->total_width > tbl->sloppy_width)
	tbl->sloppy_width = tbl->total_width;
}

static void
check_minimum0(struct table *t, int min)
{
    int i, w, ww;
    struct table_cell *cell;

    if (t->col < 0)
	return;
    if (t->tabwidth[t->col] < 0)
	return;
    check_row(t, t->row);
    w = table_colspan(t, t->row, t->col);
    min += t->indent;
    if (w == 1)
	ww = min;
    else {
	cell = &t->cell;
	ww = 0;
	if (cell->icell >= 0 && cell->minimum_width[cell->icell] < min)
	    cell->minimum_width[cell->icell] = min;
    }
    for (i = t->col;
	 i <= t->maxcol && (i == t->col || (t->tabattr[t->row][i] & HTT_X));
	 i++) {
	if (t->minimum_width[i] < ww)
	    t->minimum_width[i] = ww;
    }
}

static int
setwidth0(struct table *t, struct table_mode *mode)
{
    int w;
    int width = t->tabcontentssize;
    struct table_cell *cell = &t->cell;

    if (t->col < 0)
	return -1;
    if (t->tabwidth[t->col] < 0)
	return -1;
    check_row(t, t->row);
    if (t->linfo.prev_spaces > 0)
	width -= t->linfo.prev_spaces;
    w = table_colspan(t, t->row, t->col);
    if (w == 1) {
	if (t->tabwidth[t->col] < width)
	    t->tabwidth[t->col] = width;
    }
    else if (cell->icell >= 0) {
	if (cell->width[cell->icell] < width)
	    cell->width[cell->icell] = width;
    }
    return width;
}

static void
setwidth(struct table *t, struct table_mode *mode)
{
    int width = setwidth0(t, mode);
    if (width < 0)
	return;
#ifdef NOWRAP
    if (t->tabattr[t->row][t->col] & HTT_NOWRAP)
	check_minimum0(t, width);
#endif				/* NOWRAP */
    if (mode->pre_mode & (TBLM_NOBR | TBLM_PRE | TBLM_PRE_INT) &&
	mode->nobr_offset >= 0)
	check_minimum0(t, width - mode->nobr_offset);
}

static void
addcontentssize(struct table *t, int width)
{

    if (t->col < 0)
	return;
    if (t->tabwidth[t->col] < 0)
	return;
    check_row(t, t->row);
    t->tabcontentssize += width;
}

static void table_close_anchor0(struct table *tbl, struct table_mode *mode);

static void
clearcontentssize(struct table *t, struct table_mode *mode)
{
    table_close_anchor0(t, mode);
    mode->nobr_offset = 0;
    t->linfo.prev_spaces = -1;
    set_space_to_prevchar(t->linfo.prevchar);
    t->linfo.prev_ctype = PC_ASCII;
    t->linfo.length = 0;
    t->tabcontentssize = 0;
}

static void
begin_cell(struct table *t, struct table_mode *mode)
{
    clearcontentssize(t, mode);
    mode->indent_level = 0;
    mode->nobr_level = 0;
    mode->pre_mode = 0;
    t->indent = 0;
    t->flag |= TBL_IN_COL;

    if (t->suspended_data) {
	check_row(t, t->row);
	if (t->tabdata[t->row][t->col] == NULL)
	    t->tabdata[t->row][t->col] = newGeneralList();
	appendGeneralList(t->tabdata[t->row][t->col],
			  (GeneralList *)t->suspended_data);
	t->suspended_data = NULL;
    }
}

void
check_rowcol(struct table *tbl, struct table_mode *mode)
{
    int row = tbl->row, col = tbl->col;

    if (!(tbl->flag & TBL_IN_ROW)) {
	tbl->flag |= TBL_IN_ROW;
	tbl->row++;
	if (tbl->row > tbl->maxrow)
	    tbl->maxrow = tbl->row;
	tbl->col = -1;
    }
    if (tbl->row == -1)
	tbl->row = 0;
    if (tbl->col == -1)
	tbl->col = 0;

    for (;; tbl->row++) {
	check_row(tbl, tbl->row);
	for (; tbl->col < MAXCOL &&
	     tbl->tabattr[tbl->row][tbl->col] & (HTT_X | HTT_Y); tbl->col++) ;
	if (tbl->col < MAXCOL)
	    break;
	tbl->col = 0;
    }
    if (tbl->row > tbl->maxrow)
	tbl->maxrow = tbl->row;
    if (tbl->col > tbl->maxcol)
	tbl->maxcol = tbl->col;

    if (tbl->row != row || tbl->col != col)
	begin_cell(tbl, mode);
    tbl->flag |= TBL_IN_COL;
}

int
skip_space(struct table *t, char *line, struct table_linfo *linfo,
	   int checkminimum)
{
    int skip = 0, s = linfo->prev_spaces;
    Lineprop ctype, prev_ctype = linfo->prev_ctype;
    Str prevchar = linfo->prevchar;
    int w = linfo->length;
    int min = 1;

    if (*line == '<' && line[strlen(line) - 1] == '>') {
	if (checkminimum)
	    check_minimum0(t, visible_length(line));
	return 0;
    }

    while (*line) {
	char *save = line, *c = line;
	int ec, len, wlen, plen;
	ctype = get_mctype(line);
	len = get_mcwidth(line);
	wlen = plen = get_mclen(line);

	if (min < w)
	    min = w;
	if (ctype == PC_ASCII && IS_SPACE(*c)) {
	    w = 0;
	    s++;
	}
	else {
	    if (*c == '&') {
		ec = getescapechar(&line);
		if (ec >= 0) {
		    c = conv_entity(ec);
		    ctype = get_mctype(c);
		    len = get_strwidth(c);
		    wlen = line - save;
		    plen = get_mclen(c);
		}
	    }
	    if (prevchar->length && is_boundary((unsigned char *)prevchar->ptr,
						(unsigned char *)c)) {
		w = len;
	    }
	    else {
		w += len;
	    }
	    if (s > 0) {
#ifdef USE_M17N
		if (ctype == PC_KANJI1 && prev_ctype == PC_KANJI1)
		    skip += s;
		else
#endif
		    skip += s - 1;
	    }
	    s = 0;
	    prev_ctype = ctype;
	}
	set_prevchar(prevchar, c, plen);
	line = save + wlen;
    }
    if (s > 1) {
	skip += s - 1;
	linfo->prev_spaces = 1;
    }
    else {
	linfo->prev_spaces = s;
    }
    linfo->prev_ctype = prev_ctype;
    linfo->prevchar = prevchar;

    if (checkminimum) {
	if (min < w)
	    min = w;
	linfo->length = w;
	check_minimum0(t, min);
    }
    return skip;
}

static void
feed_table_inline_tag(struct table *tbl,
		      char *line, struct table_mode *mode, int width)
{
    check_rowcol(tbl, mode);
    pushdata(tbl, tbl->row, tbl->col, line);
    if (width >= 0) {
	check_minimum0(tbl, width);
	addcontentssize(tbl, width);
	setwidth(tbl, mode);
    }
}

static void
feed_table_block_tag(struct table *tbl,
		     char *line, struct table_mode *mode, int indent, int cmd)
{
    int offset;
    if (mode->indent_level <= 0 && indent == -1)
	return;
    if (mode->indent_level >= CHAR_MAX && indent == 1)
	return;
    setwidth(tbl, mode);
    feed_table_inline_tag(tbl, line, mode, -1);
    clearcontentssize(tbl, mode);
    if (indent == 1) {
	mode->indent_level++;
	if (mode->indent_level <= MAX_INDENT_LEVEL)
	    tbl->indent += INDENT_INCR;
    }
    else if (indent == -1) {
	mode->indent_level--;
	if (mode->indent_level < MAX_INDENT_LEVEL)
	    tbl->indent -= INDENT_INCR;
    }
    offset = tbl->indent;
    if (cmd == HTML_DT) {
	if (mode->indent_level > 0 && mode->indent_level <= MAX_INDENT_LEVEL)
	    offset -= INDENT_INCR;
    }
    if (tbl->indent > 0) {
	check_minimum0(tbl, 0);
	addcontentssize(tbl, offset);
    }
}

static void
table_close_select(struct table *tbl, struct table_mode *mode, int width)
{
    Str tmp = process_n_select();
    mode->pre_mode &= ~TBLM_INSELECT;
    mode->end_tag = 0;
    feed_table1(tbl, tmp, mode, width);
}

static void
table_close_textarea(struct table *tbl, struct table_mode *mode, int width)
{
    Str tmp = process_n_textarea();
    mode->pre_mode &= ~TBLM_INTXTA;
    mode->end_tag = 0;
    feed_table1(tbl, tmp, mode, width);
}

static void
table_close_anchor0(struct table *tbl, struct table_mode *mode)
{
    if (!(mode->pre_mode & TBLM_ANCHOR))
	return;
    mode->pre_mode &= ~TBLM_ANCHOR;
    if (tbl->tabcontentssize == mode->anchor_offset) {
	check_minimum0(tbl, 1);
	addcontentssize(tbl, 1);
	setwidth(tbl, mode);
    }
    else if (tbl->linfo.prev_spaces > 0 &&
	     tbl->tabcontentssize - 1 == mode->anchor_offset) {
	if (tbl->linfo.prev_spaces > 0)
	    tbl->linfo.prev_spaces = -1;
    }
}

#define TAG_ACTION_NONE 0
#define TAG_ACTION_FEED 1
#define TAG_ACTION_TABLE 2
#define TAG_ACTION_N_TABLE 3
#define TAG_ACTION_PLAIN 4

#define CASE_TABLE_TAG \
	case HTML_TABLE:\
	case HTML_N_TABLE:\
	case HTML_TR:\
	case HTML_N_TR:\
	case HTML_TD:\
	case HTML_N_TD:\
	case HTML_TH:\
	case HTML_N_TH:\
	case HTML_THEAD:\
	case HTML_N_THEAD:\
	case HTML_TBODY:\
	case HTML_N_TBODY:\
	case HTML_TFOOT:\
	case HTML_N_TFOOT:\
	case HTML_COLGROUP:\
	case HTML_N_COLGROUP:\
	case HTML_COL

#define ATTR_ROWSPAN_MAX 32766

static int
feed_table_tag(struct table *tbl, char *line, struct table_mode *mode,
	       int width, struct parsed_tag *tag)
{
    int cmd;
#ifdef ID_EXT
    char *p;
#endif
    struct table_cell *cell = &tbl->cell;
    int colspan, rowspan;
    int col, prev_col;
    int i, j, k, v, v0, w, id;
    Str tok, tmp, anchor;
    table_attr align, valign;

    cmd = tag->tagid;

    if (mode->pre_mode & TBLM_PLAIN) {
	if (mode->end_tag == cmd) {
	    mode->pre_mode &= ~TBLM_PLAIN;
	    mode->end_tag = 0;
	    feed_table_block_tag(tbl, line, mode, 0, cmd);
	    return TAG_ACTION_NONE;
	}
	return TAG_ACTION_PLAIN;
    }
    if (mode->pre_mode & TBLM_INTXTA) {
	switch (cmd) {
	CASE_TABLE_TAG:
	case HTML_N_TEXTAREA:
	    table_close_textarea(tbl, mode, width);
	    if (cmd == HTML_N_TEXTAREA)
		return TAG_ACTION_NONE;
	    break;
	default:
	    return TAG_ACTION_FEED;
	}
    }
    if (mode->pre_mode & TBLM_SCRIPT) {
	if (mode->end_tag == cmd) {
	    mode->pre_mode &= ~TBLM_SCRIPT;
	    mode->end_tag = 0;
	    return TAG_ACTION_NONE;
	}
	return TAG_ACTION_PLAIN;
    }
    if (mode->pre_mode & TBLM_STYLE) {
	if (mode->end_tag == cmd) {
	    mode->pre_mode &= ~TBLM_STYLE;
	    mode->end_tag = 0;
	    return TAG_ACTION_NONE;
	}
	return TAG_ACTION_PLAIN;
    }
    /* failsafe: a tag other than <option></option>and </select> in *
     * <select> environment is regarded as the end of <select>. */
    if (mode->pre_mode & TBLM_INSELECT) {
	switch (cmd) {
	  CASE_TABLE_TAG:
	case HTML_N_FORM:
	case HTML_N_SELECT:	/* mode->end_tag */
	    table_close_select(tbl, mode, width);
	    if (cmd == HTML_N_SELECT)
		return TAG_ACTION_NONE;
	    break;
	default:
	    return TAG_ACTION_FEED;
	}
    }
    if (mode->caption) {
	switch (cmd) {
	  CASE_TABLE_TAG:
	case HTML_N_CAPTION:
	    mode->caption = 0;
	    if (cmd == HTML_N_CAPTION)
		return TAG_ACTION_NONE;
	    break;
	default:
	    return TAG_ACTION_FEED;
	}
    }

    if (mode->pre_mode & TBLM_PRE) {
	switch (cmd) {
	case HTML_NOBR:
	case HTML_N_NOBR:
	case HTML_PRE_INT:
	case HTML_N_PRE_INT:
	    return TAG_ACTION_NONE;
	}
    }

    switch (cmd) {
    case HTML_TABLE:
	check_rowcol(tbl, mode);
	return TAG_ACTION_TABLE;
    case HTML_N_TABLE:
	if (tbl->suspended_data)
	    check_rowcol(tbl, mode);
	return TAG_ACTION_N_TABLE;
    case HTML_TR:
	if (tbl->col >= 0 && tbl->tabcontentssize > 0)
	    setwidth(tbl, mode);
	tbl->col = -1;
	tbl->row++;
	tbl->flag |= TBL_IN_ROW;
	tbl->flag &= ~TBL_IN_COL;
	align = 0;
	valign = 0;
	if (parsedtag_get_value(tag, ATTR_ALIGN, &i)) {
	    switch (i) {
	    case ALIGN_LEFT:
		align = (HTT_LEFT | HTT_TRSET);
		break;
	    case ALIGN_RIGHT:
		align = (HTT_RIGHT | HTT_TRSET);
		break;
	    case ALIGN_CENTER:
		align = (HTT_CENTER | HTT_TRSET);
		break;
	    }
	}
	if (parsedtag_get_value(tag, ATTR_VALIGN, &i)) {
	    switch (i) {
	    case VALIGN_TOP:
		valign = (HTT_TOP | HTT_VTRSET);
		break;
	    case VALIGN_MIDDLE:
		valign = (HTT_MIDDLE | HTT_VTRSET);
		break;
	    case VALIGN_BOTTOM:
		valign = (HTT_BOTTOM | HTT_VTRSET);
		break;
	    }
	}
#ifdef ID_EXT
	if (parsedtag_get_value(tag, ATTR_ID, &p)) {
	    check_row(tbl, tbl->row);
	    tbl->tridvalue[tbl->row] = Strnew_charp(p);
	}
#endif				/* ID_EXT */
	tbl->trattr = align | valign;
	break;
    case HTML_TH:
    case HTML_TD:
	prev_col = tbl->col;
	if (tbl->col >= 0 && tbl->tabcontentssize > 0)
	    setwidth(tbl, mode);
	if (tbl->row == -1) {
	    /* for broken HTML... */
	    tbl->row = -1;
	    tbl->col = -1;
	    tbl->maxrow = tbl->row;
	}
	if (tbl->col == -1) {
	    if (!(tbl->flag & TBL_IN_ROW)) {
		tbl->row++;
		tbl->flag |= TBL_IN_ROW;
	    }
	    if (tbl->row > tbl->maxrow)
		tbl->maxrow = tbl->row;
	}
	tbl->col++;
	check_row(tbl, tbl->row);
	while (tbl->col < MAXCOL && tbl->tabattr[tbl->row][tbl->col]) {
	    tbl->col++;
	}
	if (tbl->col > MAXCOL - 1) {
	    tbl->col = prev_col;
	    return TAG_ACTION_NONE;
	}
	if (tbl->col > tbl->maxcol) {
	    tbl->maxcol = tbl->col;
	}
	colspan = rowspan = 1;
	if (tbl->trattr & HTT_TRSET)
	    align = (tbl->trattr & HTT_ALIGN);
	else if (cmd == HTML_TH)
	    align = HTT_CENTER;
	else
	    align = HTT_LEFT;
	if (tbl->trattr & HTT_VTRSET)
	    valign = (tbl->trattr & HTT_VALIGN);
	else
	    valign = HTT_MIDDLE;
	if (parsedtag_get_value(tag, ATTR_ROWSPAN, &rowspan)) {
	    if(rowspan > ATTR_ROWSPAN_MAX) {
		rowspan = ATTR_ROWSPAN_MAX;
	    }
	    if ((tbl->row + rowspan) >= tbl->max_rowsize)
		check_row(tbl, tbl->row + rowspan);
	}
	if (rowspan < 1)
	    rowspan = 1;
	if (parsedtag_get_value(tag, ATTR_COLSPAN, &colspan)) {
	    if ((tbl->col + colspan) >= MAXCOL) {
		/* Can't expand column */
		colspan = MAXCOL - tbl->col;
	    }
	}
	if (colspan < 1)
	    colspan = 1;
	if (parsedtag_get_value(tag, ATTR_ALIGN, &i)) {
	    switch (i) {
	    case ALIGN_LEFT:
		align = HTT_LEFT;
		break;
	    case ALIGN_RIGHT:
		align = HTT_RIGHT;
		break;
	    case ALIGN_CENTER:
		align = HTT_CENTER;
		break;
	    }
	}
	if (parsedtag_get_value(tag, ATTR_VALIGN, &i)) {
	    switch (i) {
	    case VALIGN_TOP:
		valign = HTT_TOP;
		break;
	    case VALIGN_MIDDLE:
		valign = HTT_MIDDLE;
		break;
	    case VALIGN_BOTTOM:
		valign = HTT_BOTTOM;
		break;
	    }
	}
#ifdef NOWRAP
	if (parsedtag_exists(tag, ATTR_NOWRAP))
	    tbl->tabattr[tbl->row][tbl->col] |= HTT_NOWRAP;
#endif				/* NOWRAP */
	v = 0;
	if (parsedtag_get_value(tag, ATTR_WIDTH, &v)) {
#ifdef TABLE_EXPAND
	    if (v > 0) {
		if (tbl->real_width > 0)
		    v = -(v * 100) / (tbl->real_width * pixel_per_char);
		else
		    v = (int)(v / pixel_per_char);
	    }
#else
	    v = RELATIVE_WIDTH(v);
#endif				/* not TABLE_EXPAND */
	}
#ifdef ID_EXT
	if (parsedtag_get_value(tag, ATTR_ID, &p))
	    tbl->tabidvalue[tbl->row][tbl->col] = Strnew_charp(p);
#endif				/* ID_EXT */
#ifdef NOWRAP
	if (v != 0) {
	    /* NOWRAP and WIDTH= conflicts each other */
	    tbl->tabattr[tbl->row][tbl->col] &= ~HTT_NOWRAP;
	}
#endif				/* NOWRAP */
	tbl->tabattr[tbl->row][tbl->col] &= ~(HTT_ALIGN | HTT_VALIGN);
	tbl->tabattr[tbl->row][tbl->col] |= (align | valign);
	if (colspan > 1) {
	    col = tbl->col;

	    cell->icell = cell->maxcell + 1;
	    k = bsearch_2short(colspan, cell->colspan, col, cell->col, MAXCOL,
			       cell->index, cell->icell);
	    if (k <= cell->maxcell) {
		i = cell->index[k];
		if (cell->col[i] == col && cell->colspan[i] == colspan)
		    cell->icell = i;
	    }
	    if (cell->icell > cell->maxcell && cell->icell < MAXCELL) {
		cell->maxcell++;
		cell->col[cell->maxcell] = col;
		cell->colspan[cell->maxcell] = colspan;
		cell->width[cell->maxcell] = 0;
		cell->minimum_width[cell->maxcell] = 0;
		cell->fixed_width[cell->maxcell] = 0;
		if (cell->maxcell > k) {
		    int ii;
		    for (ii = cell->maxcell; ii > k; ii--)
			cell->index[ii] = cell->index[ii - 1];
		}
		cell->index[k] = cell->maxcell;
	    }
	    if (cell->icell > cell->maxcell)
		cell->icell = -1;
	}
	if (v != 0) {
	    if (colspan == 1) {
		v0 = tbl->fixed_width[tbl->col];
		if (v0 == 0 || (v0 > 0 && v > v0) || (v0 < 0 && v < v0)) {
#ifdef FEED_TABLE_DEBUG
		    fprintf(stderr, "width(%d) = %d\n", tbl->col, v);
#endif				/* TABLE_DEBUG */
		    tbl->fixed_width[tbl->col] = v;
		}
	    }
	    else if (cell->icell >= 0) {
		v0 = cell->fixed_width[cell->icell];
		if (v0 == 0 || (v0 > 0 && v > v0) || (v0 < 0 && v < v0))
		    cell->fixed_width[cell->icell] = v;
	    }
	}
	for (i = 0; i < rowspan; i++) {
	    check_row(tbl, tbl->row + i);
	    for (j = 0; j < colspan; j++) {
#if 0
		tbl->tabattr[tbl->row + i][tbl->col + j] &= ~(HTT_X | HTT_Y);
#endif
		if (!(tbl->tabattr[tbl->row + i][tbl->col + j] &
		      (HTT_X | HTT_Y))) {
		    tbl->tabattr[tbl->row + i][tbl->col + j] |=
			((i > 0) ? HTT_Y : 0) | ((j > 0) ? HTT_X : 0);
		}
		if (tbl->col + j > tbl->maxcol) {
		    tbl->maxcol = tbl->col + j;
		}
	    }
	    if (tbl->row + i > tbl->maxrow) {
		tbl->maxrow = tbl->row + i;
	    }
	}
	begin_cell(tbl, mode);
	break;
    case HTML_N_TR:
	setwidth(tbl, mode);
	tbl->col = -1;
	tbl->flag &= ~(TBL_IN_ROW | TBL_IN_COL);
	return TAG_ACTION_NONE;
    case HTML_N_TH:
    case HTML_N_TD:
	setwidth(tbl, mode);
	tbl->flag &= ~TBL_IN_COL;
#ifdef FEED_TABLE_DEBUG
	{
	    TextListItem *it;
	    int i = tbl->col, j = tbl->row;
	    fprintf(stderr, "(a) row,col: %d, %d\n", j, i);
	    if (tbl->tabdata[j] && tbl->tabdata[j][i]) {
		for (it = ((TextList *)tbl->tabdata[j][i])->first;
		     it; it = it->next)
		    fprintf(stderr, "  [%s] \n", it->ptr);
	    }
	}
#endif
	return TAG_ACTION_NONE;
    case HTML_P:
    case HTML_BR:
    case HTML_CENTER:
    case HTML_N_CENTER:
    case HTML_DIV:
    case HTML_N_DIV:
	if (!(tbl->flag & TBL_IN_ROW))
	    break;
    case HTML_DT:
    case HTML_DD:
    case HTML_H:
    case HTML_N_H:
    case HTML_LI:
    case HTML_PRE:
    case HTML_N_PRE:
    case HTML_HR:
    case HTML_LISTING:
    case HTML_XMP:
    case HTML_PLAINTEXT:
    case HTML_PRE_PLAIN:
    case HTML_N_PRE_PLAIN:
	feed_table_block_tag(tbl, line, mode, 0, cmd);
	switch (cmd) {
	case HTML_PRE:
	case HTML_PRE_PLAIN:
	    mode->pre_mode |= TBLM_PRE;
	    break;
	case HTML_N_PRE:
	case HTML_N_PRE_PLAIN:
	    mode->pre_mode &= ~TBLM_PRE;
	    break;
	case HTML_LISTING:
	    mode->pre_mode |= TBLM_PLAIN;
	    mode->end_tag = HTML_N_LISTING;
	    break;
	case HTML_XMP:
	    mode->pre_mode |= TBLM_PLAIN;
	    mode->end_tag = HTML_N_XMP;
	    break;
	case HTML_PLAINTEXT:
	    mode->pre_mode |= TBLM_PLAIN;
	    mode->end_tag = MAX_HTMLTAG;
	    break;
	}
	break;
    case HTML_DL:
    case HTML_BLQ:
    case HTML_OL:
    case HTML_UL:
	feed_table_block_tag(tbl, line, mode, 1, cmd);
	break;
    case HTML_N_DL:
    case HTML_N_BLQ:
    case HTML_N_OL:
    case HTML_N_UL:
	feed_table_block_tag(tbl, line, mode, -1, cmd);
	break;
    case HTML_NOBR:
    case HTML_WBR:
	if (!(tbl->flag & TBL_IN_ROW))
	    break;
    case HTML_PRE_INT:
	feed_table_inline_tag(tbl, line, mode, -1);
	switch (cmd) {
	case HTML_NOBR:
	    mode->nobr_level++;
	    if (mode->pre_mode & TBLM_NOBR)
		return TAG_ACTION_NONE;
	    mode->pre_mode |= TBLM_NOBR;
	    break;
	case HTML_PRE_INT:
	    if (mode->pre_mode & TBLM_PRE_INT)
		return TAG_ACTION_NONE;
	    mode->pre_mode |= TBLM_PRE_INT;
	    tbl->linfo.prev_spaces = 0;
	    break;
	}
	mode->nobr_offset = -1;
	if (tbl->linfo.length > 0) {
	    check_minimum0(tbl, tbl->linfo.length);
	    tbl->linfo.length = 0;
	}
	break;
    case HTML_N_NOBR:
	if (!(tbl->flag & TBL_IN_ROW))
	    break;
	feed_table_inline_tag(tbl, line, mode, -1);
	if (mode->nobr_level > 0)
	    mode->nobr_level--;
	if (mode->nobr_level == 0)
	    mode->pre_mode &= ~TBLM_NOBR;
	break;
    case HTML_N_PRE_INT:
	feed_table_inline_tag(tbl, line, mode, -1);
	mode->pre_mode &= ~TBLM_PRE_INT;
	break;
    case HTML_IMG:
	check_rowcol(tbl, mode);
	w = tbl->fixed_width[tbl->col];
	if (w < 0) {
	    if (tbl->total_width > 0)
		w = -tbl->total_width * w / 100;
	    else if (width > 0)
		w = -width * w / 100;
	    else
		w = 0;
	}
	else if (w == 0) {
	    if (tbl->total_width > 0)
		w = tbl->total_width;
	    else if (width > 0)
		w = width;
	}
	tok = process_img(tag, w);
	feed_table1(tbl, tok, mode, width);
	break;
    case HTML_FORM:
	feed_table_block_tag(tbl, "", mode, 0, cmd);
	tmp = process_form(tag);
	if (tmp)
	    feed_table1(tbl, tmp, mode, width);
	break;
    case HTML_N_FORM:
	feed_table_block_tag(tbl, "", mode, 0, cmd);
	process_n_form();
	break;
    case HTML_INPUT:
	tmp = process_input(tag);
	feed_table1(tbl, tmp, mode, width);
	break;
    case HTML_BUTTON:
       tmp = process_button(tag);
       feed_table1(tbl, tmp, mode, width);
       break;
    case HTML_N_BUTTON:
       tmp = process_n_button();
       feed_table1(tbl, tmp, mode, width);
       break;
    case HTML_SELECT:
	tmp = process_select(tag);
	if (tmp)
	    feed_table1(tbl, tmp, mode, width);
	mode->pre_mode |= TBLM_INSELECT;
	mode->end_tag = HTML_N_SELECT;
	break;
    case HTML_N_SELECT:
    case HTML_OPTION:
	/* nothing */
	break;
    case HTML_TEXTAREA:
	w = 0;
	check_rowcol(tbl, mode);
	if (tbl->col + 1 <= tbl->maxcol &&
	    tbl->tabattr[tbl->row][tbl->col + 1] & HTT_X) {
	    if (cell->icell >= 0 && cell->fixed_width[cell->icell] > 0)
		w = cell->fixed_width[cell->icell];
	}
	else {
	    if (tbl->fixed_width[tbl->col] > 0)
		w = tbl->fixed_width[tbl->col];
	}
	tmp = process_textarea(tag, w);
	if (tmp)
	    feed_table1(tbl, tmp, mode, width);
	mode->pre_mode |= TBLM_INTXTA;
	mode->end_tag = HTML_N_TEXTAREA;
	break;
    case HTML_A:
	table_close_anchor0(tbl, mode);
	anchor = NULL;
	i = 0;
	parsedtag_get_value(tag, ATTR_HREF, &anchor);
	parsedtag_get_value(tag, ATTR_HSEQ, &i);
	if (anchor) {
	    check_rowcol(tbl, mode);
	    if (i == 0) {
		Str tmp = process_anchor(tag, line);
    		if (displayLinkNumber)
		{
			Str t = getLinkNumberStr(-1);
			feed_table_inline_tag(tbl, NULL, mode, t->length);
			Strcat(tmp, t);
		}
		pushdata(tbl, tbl->row, tbl->col, tmp->ptr);
	    }
	    else
		pushdata(tbl, tbl->row, tbl->col, line);
	    if (i >= 0) {
		mode->pre_mode |= TBLM_ANCHOR;
		mode->anchor_offset = tbl->tabcontentssize;
	    }
	}
	else
	    suspend_or_pushdata(tbl, line);
	break;
    case HTML_DEL:
	switch (displayInsDel) {
	case DISPLAY_INS_DEL_SIMPLE:
	    mode->pre_mode |= TBLM_DEL;
	    break;
	case DISPLAY_INS_DEL_NORMAL:
	    feed_table_inline_tag(tbl, line, mode, 5);	/* [DEL: */
	    break;
	case DISPLAY_INS_DEL_FONTIFY:
	    feed_table_inline_tag(tbl, line, mode, -1);
	    break;
	}
	break;
    case HTML_N_DEL:
	switch (displayInsDel) {
	case DISPLAY_INS_DEL_SIMPLE:
	    mode->pre_mode &= ~TBLM_DEL;
	    break;
	case DISPLAY_INS_DEL_NORMAL:
	    feed_table_inline_tag(tbl, line, mode, 5);	/* :DEL] */
	    break;
	case DISPLAY_INS_DEL_FONTIFY:
	    feed_table_inline_tag(tbl, line, mode, -1);
	    break;
	}
	break;
    case HTML_S:
	switch (displayInsDel) {
	case DISPLAY_INS_DEL_SIMPLE:
	    mode->pre_mode |= TBLM_S;
	    break;
	case DISPLAY_INS_DEL_NORMAL:
	    feed_table_inline_tag(tbl, line, mode, 3);	/* [S: */
	    break;
	case DISPLAY_INS_DEL_FONTIFY:
	    feed_table_inline_tag(tbl, line, mode, -1);
	    break;
	}
	break;
    case HTML_N_S:
	switch (displayInsDel) {
	case DISPLAY_INS_DEL_SIMPLE:
	    mode->pre_mode &= ~TBLM_S;
	    break;
	case DISPLAY_INS_DEL_NORMAL:
	    feed_table_inline_tag(tbl, line, mode, 3);	/* :S] */
	    break;
	case DISPLAY_INS_DEL_FONTIFY:
	    feed_table_inline_tag(tbl, line, mode, -1);
	    break;
	}
	break;
    case HTML_INS:
    case HTML_N_INS:
	switch (displayInsDel) {
	case DISPLAY_INS_DEL_SIMPLE:
	    break;
	case DISPLAY_INS_DEL_NORMAL:
	    feed_table_inline_tag(tbl, line, mode, 5);	/* [INS:, :INS] */
	    break;
	case DISPLAY_INS_DEL_FONTIFY:
	    feed_table_inline_tag(tbl, line, mode, -1);
	    break;
	}
	break;
    case HTML_SUP:
    case HTML_SUB:
    case HTML_N_SUB:
	if (!(mode->pre_mode & (TBLM_DEL | TBLM_S)))
	    feed_table_inline_tag(tbl, line, mode, 1);	/* ^, [, ] */
	break;
    case HTML_N_SUP:
	break;
    case HTML_TABLE_ALT:
	id = -1;
	parsedtag_get_value(tag, ATTR_TID, &id);
	if (id >= 0 && id < tbl->ntable) {
	    struct table *tbl1 = tbl->tables[id].ptr;
	    feed_table_block_tag(tbl, line, mode, 0, cmd);
	    addcontentssize(tbl, maximum_table_width(tbl1));
	    check_minimum0(tbl, tbl1->sloppy_width);
#ifdef TABLE_EXPAND
	    w = tbl1->total_width;
	    v = 0;
	    colspan = table_colspan(tbl, tbl->row, tbl->col);
	    if (colspan > 1) {
		if (cell->icell >= 0)
		    v = cell->fixed_width[cell->icell];
	    }
	    else
		v = tbl->fixed_width[tbl->col];
	    if (v < 0 && tbl->real_width > 0 && tbl1->real_width > 0)
		w = -(tbl1->real_width * 100) / tbl->real_width;
	    else
		w = tbl1->real_width;
	    if (w > 0)
		check_minimum0(tbl, w);
	    else if (w < 0 && v < w) {
		if (colspan > 1) {
		    if (cell->icell >= 0)
			cell->fixed_width[cell->icell] = w;
		}
		else
		    tbl->fixed_width[tbl->col] = w;
	    }
#endif
	    setwidth0(tbl, mode);
	    clearcontentssize(tbl, mode);
	}
	break;
    case HTML_CAPTION:
	mode->caption = 1;
	break;
    case HTML_N_CAPTION:
    case HTML_THEAD:
    case HTML_N_THEAD:
    case HTML_TBODY:
    case HTML_N_TBODY:
    case HTML_TFOOT:
    case HTML_N_TFOOT:
    case HTML_COLGROUP:
    case HTML_N_COLGROUP:
    case HTML_COL:
	break;
    case HTML_SCRIPT:
	mode->pre_mode |= TBLM_SCRIPT;
	mode->end_tag = HTML_N_SCRIPT;
	break;
    case HTML_STYLE:
	mode->pre_mode |= TBLM_STYLE;
	mode->end_tag = HTML_N_STYLE;
	break;
    case HTML_N_A:
	table_close_anchor0(tbl, mode);
    case HTML_FONT:
    case HTML_N_FONT:
    case HTML_NOP:
	suspend_or_pushdata(tbl, line);
	break;
    case HTML_INTERNAL:
    case HTML_N_INTERNAL:
    case HTML_FORM_INT:
    case HTML_N_FORM_INT:
    case HTML_INPUT_ALT:
    case HTML_N_INPUT_ALT:
    case HTML_SELECT_INT:
    case HTML_N_SELECT_INT:
    case HTML_OPTION_INT:
    case HTML_TEXTAREA_INT:
    case HTML_N_TEXTAREA_INT:
    case HTML_IMG_ALT:
    case HTML_SYMBOL:
    case HTML_N_SYMBOL:
    default:
	/* unknown tag: put into table */
	return TAG_ACTION_FEED;
    }
    return TAG_ACTION_NONE;
}


int
feed_table(struct table *tbl, char *line, struct table_mode *mode,
	   int width, int internal)
{
    int i;
    char *p;
    Str tmp;
    struct table_linfo *linfo = &tbl->linfo;

    if (*line == '<' && line[1] && REALLY_THE_BEGINNING_OF_A_TAG(line)) {
	struct parsed_tag *tag;
	p = line;
	tag = parse_tag(&p, internal);
	if (tag) {
	    switch (feed_table_tag(tbl, line, mode, width, tag)) {
	    case TAG_ACTION_NONE:
		return -1;
	    case TAG_ACTION_N_TABLE:
		return 0;
	    case TAG_ACTION_TABLE:
		return 1;
	    case TAG_ACTION_PLAIN:
		break;
	    case TAG_ACTION_FEED:
	    default:
		if (parsedtag_need_reconstruct(tag))
		    line = parsedtag2str(tag)->ptr;
	    }
	}
	else {
	    if (!(mode->pre_mode & (TBLM_PLAIN | TBLM_INTXTA | TBLM_INSELECT |
				    TBLM_SCRIPT | TBLM_STYLE)))
		return -1;
	}
    }
    else {
	if (mode->pre_mode & (TBLM_DEL | TBLM_S))
	    return -1;
    }
    if (mode->caption) {
	Strcat_charp(tbl->caption, line);
	return -1;
    }
    if (mode->pre_mode & TBLM_SCRIPT)
	return -1;
    if (mode->pre_mode & TBLM_STYLE)
	return -1;
    if (mode->pre_mode & TBLM_INTXTA) {
	feed_textarea(line);
	return -1;
    }
    if (mode->pre_mode & TBLM_INSELECT) {
	feed_select(line);
	return -1;
    }
    if (!(mode->pre_mode & TBLM_PLAIN) &&
	!(*line == '<' && line[strlen(line) - 1] == '>') &&
	strchr(line, '&') != NULL) {
	tmp = Strnew();
	for (p = line; *p;) {
	    char *q, *r;
	    if (*p == '&') {
		if (!strncasecmp(p, "&amp;", 5) ||
		    !strncasecmp(p, "&gt;", 4) || !strncasecmp(p, "&lt;", 4)) {
		    /* do not convert */
		    Strcat_char(tmp, *p);
		    p++;
		}
		else {
		    int ec;
		    q = p;
		    switch (ec = getescapechar(&p)) {
		    case '<':
			Strcat_charp(tmp, "&lt;");
			break;
		    case '>':
			Strcat_charp(tmp, "&gt;");
			break;
		    case '&':
			Strcat_charp(tmp, "&amp;");
			break;
		    case '\r':
			Strcat_char(tmp, '\n');
			break;
		    default:
			r = conv_entity(ec);
			if (r != NULL && strlen(r) == 1 &&
			    ec == (unsigned char)*r) {
			    Strcat_char(tmp, *r);
			    break;
			}
		    case -1:
			Strcat_char(tmp, *q);
			p = q + 1;
			break;
		    }
		}
	    }
	    else {
		Strcat_char(tmp, *p);
		p++;
	    }
	}
	line = tmp->ptr;
    }
    if (!(mode->pre_mode & (TBLM_SPECIAL & ~TBLM_NOBR))) {
	if (!(tbl->flag & TBL_IN_COL) || linfo->prev_spaces != 0)
	    while (IS_SPACE(*line))
		line++;
	if (*line == '\0')
	    return -1;
	check_rowcol(tbl, mode);
	if (mode->pre_mode & TBLM_NOBR && mode->nobr_offset < 0)
	    mode->nobr_offset = tbl->tabcontentssize;

	/* count of number of spaces skipped in normal mode */
	i = skip_space(tbl, line, linfo, !(mode->pre_mode & TBLM_NOBR));
	addcontentssize(tbl, visible_length(line) - i);
	setwidth(tbl, mode);
	pushdata(tbl, tbl->row, tbl->col, line);
    }
    else if (mode->pre_mode & TBLM_PRE_INT) {
	check_rowcol(tbl, mode);
	if (mode->nobr_offset < 0)
	    mode->nobr_offset = tbl->tabcontentssize;
	addcontentssize(tbl, maximum_visible_length(line, tbl->tabcontentssize));
	setwidth(tbl, mode);
	pushdata(tbl, tbl->row, tbl->col, line);
    }
    else {
	/* <pre> mode or something like it */
	check_rowcol(tbl, mode);
	while (*line) {
	    int nl = FALSE;
	    if ((p = strchr(line, '\r')) || (p = strchr(line, '\n'))) {
		if (*p == '\r' && p[1] == '\n')
		    p++;
		if (p[1]) {
		    p++;
		    tmp = Strnew_charp_n(line, p - line);
		    line = p;
		    p = tmp->ptr;
		}
		else {
		    p = line;
		    line = "";
		}
		nl = TRUE;
	    }
	    else {
		p = line;
		line = "";
	    }
	    if (mode->pre_mode & TBLM_PLAIN)
		i = maximum_visible_length_plain(p, tbl->tabcontentssize);
	    else
		i = maximum_visible_length(p, tbl->tabcontentssize);
	    addcontentssize(tbl, i);
	    setwidth(tbl, mode);
	    if (nl)
		clearcontentssize(tbl, mode);
	    pushdata(tbl, tbl->row, tbl->col, p);
	}
    }
    return -1;
}

void
feed_table1(struct table *tbl, Str tok, struct table_mode *mode, int width)
{
    Str tokbuf;
    int status;
    char *line;
    if (!tok)
	return;
    tokbuf = Strnew();
    status = R_ST_NORMAL;
    line = tok->ptr;
    while (read_token
	   (tokbuf, &line, &status, mode->pre_mode & TBLM_PREMODE, 0))
	feed_table(tbl, tokbuf->ptr, mode, width, TRUE);
}

void
pushTable(struct table *tbl, struct table *tbl1)
{
    int col;
    int row;

    col = tbl->col;
    row = tbl->row;

    if (tbl->ntable >= tbl->tables_size) {
	struct table_in *tmp;
	tbl->tables_size += MAX_TABLE_N;
	tmp = New_N(struct table_in, tbl->tables_size);
	if (tbl->tables)
	    bcopy(tbl->tables, tmp, tbl->ntable * sizeof(struct table_in));
	tbl->tables = tmp;
    }

    tbl->tables[tbl->ntable].ptr = tbl1;
    tbl->tables[tbl->ntable].col = col;
    tbl->tables[tbl->ntable].row = row;
    tbl->tables[tbl->ntable].indent = tbl->indent;
    tbl->tables[tbl->ntable].buf = newTextLineList();
    check_row(tbl, row);
    if (col + 1 <= tbl->maxcol && tbl->tabattr[row][col + 1] & HTT_X)
	tbl->tables[tbl->ntable].cell = tbl->cell.icell;
    else
	tbl->tables[tbl->ntable].cell = -1;
    tbl->ntable++;
}

#ifdef MATRIX
int
correct_table_matrix(struct table *t, int col, int cspan, int a, double b)
{
    int i, j;
    int ecol = col + cspan;
    double w = 1. / (b * b);

    for (i = col; i < ecol; i++) {
	v_add_val(t->vector, i, w * a);
	for (j = i; j < ecol; j++) {
	    m_add_val(t->matrix, i, j, w);
	    m_set_val(t->matrix, j, i, m_entry(t->matrix, i, j));
	}
    }
    return i;
}

static void
correct_table_matrix2(struct table *t, int col, int cspan, double s, double b)
{
    int i, j;
    int ecol = col + cspan;
    int size = t->maxcol + 1;
    double w = 1. / (b * b);
    double ss;

    for (i = 0; i < size; i++) {
	for (j = i; j < size; j++) {
	    if (i >= col && i < ecol && j >= col && j < ecol)
		ss = (1. - s) * (1. - s);
	    else if ((i >= col && i < ecol) || (j >= col && j < ecol))
		ss = -(1. - s) * s;
	    else
		ss = s * s;
	    m_add_val(t->matrix, i, j, w * ss);
	}
    }
}

static void
correct_table_matrix3(struct table *t, int col, char *flags, double s,
		      double b)
{
    int i, j;
    double ss;
    int size = t->maxcol + 1;
    double w = 1. / (b * b);
    int flg = (flags[col] == 0);

    for (i = 0; i < size; i++) {
	if (!((flg && flags[i] == 0) || (!flg && flags[i] != 0)))
	    continue;
	for (j = i; j < size; j++) {
	    if (!((flg && flags[j] == 0) || (!flg && flags[j] != 0)))
		continue;
	    if (i == col && j == col)
		ss = (1. - s) * (1. - s);
	    else if (i == col || j == col)
		ss = -(1. - s) * s;
	    else
		ss = s * s;
	    m_add_val(t->matrix, i, j, w * ss);
	}
    }
}

static void
correct_table_matrix4(struct table *t, int col, int cspan, char *flags,
		      double s, double b)
{
    int i, j;
    double ss;
    int ecol = col + cspan;
    int size = t->maxcol + 1;
    double w = 1. / (b * b);

    for (i = 0; i < size; i++) {
	if (flags[i] && !(i >= col && i < ecol))
	    continue;
	for (j = i; j < size; j++) {
	    if (flags[j] && !(j >= col && j < ecol))
		continue;
	    if (i >= col && i < ecol && j >= col && j < ecol)
		ss = (1. - s) * (1. - s);
	    else if ((i >= col && i < ecol) || (j >= col && j < ecol))
		ss = -(1. - s) * s;
	    else
		ss = s * s;
	    m_add_val(t->matrix, i, j, w * ss);
	}
    }
}

static void
set_table_matrix0(struct table *t, int maxwidth)
{
    int size = t->maxcol + 1;
    int i, j, k, bcol, ecol;
    int width;
    double w0, w1, w, s, b;
#ifdef __GNUC__
    double we[size];
    char expand[size];
#else				/* not __GNUC__ */
    double we[MAXCOL];
    char expand[MAXCOL];
#endif				/* not __GNUC__ */
    struct table_cell *cell = &t->cell;

    w0 = 0.;
    for (i = 0; i < size; i++) {
	we[i] = weight(t->tabwidth[i]);
	w0 += we[i];
    }
    if (w0 <= 0.)
	w0 = 1.;

    if (cell->necell == 0) {
	for (i = 0; i < size; i++) {
	    s = we[i] / w0;
	    b = sigma_td_nw((int)(s * maxwidth));
	    correct_table_matrix2(t, i, 1, s, b);
	}
	return;
    }

    bzero(expand, size);

    for (k = 0; k < cell->necell; k++) {
	j = cell->eindex[k];
	bcol = cell->col[j];
	ecol = bcol + cell->colspan[j];
	width = cell->width[j] - (cell->colspan[j] - 1) * t->cellspacing;
	w1 = 0.;
	for (i = bcol; i < ecol; i++) {
	    w1 += t->tabwidth[i] + 0.1;
	    expand[i]++;
	}
	for (i = bcol; i < ecol; i++) {
	    w = weight(width * (t->tabwidth[i] + 0.1) / w1);
	    if (w > we[i])
		we[i] = w;
	}
    }

    w0 = 0.;
    w1 = 0.;
    for (i = 0; i < size; i++) {
	w0 += we[i];
	if (expand[i] == 0)
	    w1 += we[i];
    }
    if (w0 <= 0.)
	w0 = 1.;

    for (k = 0; k < cell->necell; k++) {
	j = cell->eindex[k];
	bcol = cell->col[j];
	width = cell->width[j] - (cell->colspan[j] - 1) * t->cellspacing;
	w = weight(width);
	s = w / (w1 + w);
	b = sigma_td_nw((int)(s * maxwidth));
	correct_table_matrix4(t, bcol, cell->colspan[j], expand, s, b);
    }

    for (i = 0; i < size; i++) {
	if (expand[i] == 0) {
	    s = we[i] / max(w1, 1.);
	    b = sigma_td_nw((int)(s * maxwidth));
	}
	else {
	    s = we[i] / max(w0 - w1, 1.);
	    b = sigma_td_nw(maxwidth);
	}
	correct_table_matrix3(t, i, expand, s, b);
    }
}

void
check_relative_width(struct table *t, int maxwidth)
{
    int i;
    double rel_total = 0;
    int size = t->maxcol + 1;
    double *rcolwidth = New_N(double, size);
    struct table_cell *cell = &t->cell;
    int n_leftcol = 0;

    for (i = 0; i < size; i++)
	rcolwidth[i] = 0;

    for (i = 0; i < size; i++) {
	if (t->fixed_width[i] < 0)
	    rcolwidth[i] = -(double)t->fixed_width[i] / 100.0;
	else if (t->fixed_width[i] > 0)
	    rcolwidth[i] = (double)t->fixed_width[i] / maxwidth;
	else
	    n_leftcol++;
    }
    for (i = 0; i <= cell->maxcell; i++) {
	if (cell->fixed_width[i] < 0) {
	    double w = -(double)cell->fixed_width[i] / 100.0;
	    double r;
	    int j, k;
	    int n_leftcell = 0;
	    k = cell->col[i];
	    r = 0.0;
	    for (j = 0; j < cell->colspan[i]; j++) {
		if (rcolwidth[j + k] > 0)
		    r += rcolwidth[j + k];
		else
		    n_leftcell++;
	    }
	    if (n_leftcell == 0) {
		/* w must be identical to r */
		if (w != r)
		    cell->fixed_width[i] = -100 * r;
	    }
	    else {
		if (w <= r) {
		    /* make room for the left(width-unspecified) cell */
		    /* the next formula is an estimation of required width */
		    w = r * cell->colspan[i] / (cell->colspan[i] - n_leftcell);
		    cell->fixed_width[i] = -100 * w;
		}
		for (j = 0; j < cell->colspan[i]; j++) {
		    if (rcolwidth[j + k] == 0)
			rcolwidth[j + k] = (w - r) / n_leftcell;
		}
	    }
	}
	else if (cell->fixed_width[i] > 0) {
	    /* todo */
	}
    }
    /* sanity check */
    for (i = 0; i < size; i++)
	rel_total += rcolwidth[i];

    if ((n_leftcol == 0 && rel_total < 0.9) || 1.1 < rel_total) {
	for (i = 0; i < size; i++) {
	    rcolwidth[i] /= rel_total;
	}
	for (i = 0; i < size; i++) {
	    if (t->fixed_width[i] < 0)
		t->fixed_width[i] = -rcolwidth[i] * 100;
	}
	for (i = 0; i <= cell->maxcell; i++) {
	    if (cell->fixed_width[i] < 0) {
		double r;
		int j, k;
		k = cell->col[i];
		r = 0.0;
		for (j = 0; j < cell->colspan[i]; j++)
		    r += rcolwidth[j + k];
		cell->fixed_width[i] = -r * 100;
	    }
	}
    }
}

void
set_table_matrix(struct table *t, int width)
{
    int size = t->maxcol + 1;
    int i, j;
    double b, s;
    int a;
    struct table_cell *cell = &t->cell;

    if (size < 1)
	return;

    t->matrix = m_get(size, size);
    t->vector = v_get(size);
    for (i = 0; i < size; i++) {
	for (j = i; j < size; j++)
	    m_set_val(t->matrix, i, j, 0.);
	v_set_val(t->vector, i, 0.);
    }

    check_relative_width(t, width);

    for (i = 0; i < size; i++) {
	if (t->fixed_width[i] > 0) {
	    a = max(t->fixed_width[i], t->minimum_width[i]);
	    b = sigma_td(a);
	    correct_table_matrix(t, i, 1, a, b);
	}
	else if (t->fixed_width[i] < 0) {
	    s = -(double)t->fixed_width[i] / 100.;
	    b = sigma_td((int)(s * width));
	    correct_table_matrix2(t, i, 1, s, b);
	}
    }

    for (j = 0; j <= cell->maxcell; j++) {
	if (cell->fixed_width[j] > 0) {
	    a = max(cell->fixed_width[j], cell->minimum_width[j]);
	    b = sigma_td(a);
	    correct_table_matrix(t, cell->col[j], cell->colspan[j], a, b);
	}
	else if (cell->fixed_width[j] < 0) {
	    s = -(double)cell->fixed_width[j] / 100.;
	    b = sigma_td((int)(s * width));
	    correct_table_matrix2(t, cell->col[j], cell->colspan[j], s, b);
	}
    }

    set_table_matrix0(t, width);

    if (t->total_width > 0) {
	b = sigma_table(width);
    }
    else {
	b = sigma_table_nw(width);
    }
    correct_table_matrix(t, 0, size, width, b);
}
#endif				/* MATRIX */

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