eqn.cc

早期freebsd实现

    else
    {
        if (yychar == 0) goto yyabort;
#if YYDEBUG
        if (yydebug)
        {
            yys = 0;
            if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
            if (!yys) yys = "illegal-symbol";
            printf("yydebug: state %d, error recovery discards token %d (%s)\n",
                    yystate, yychar, yys);
        }
#endif
        yychar = (-1);
        goto yyloop;
    }
yyreduce:
#if YYDEBUG
    if (yydebug)
        printf("yydebug: state %d, reducing by rule %d (%s)\n",
                yystate, yyn, yyrule[yyn]);
#endif
    yym = yylen[yyn];
    yyval = yyvsp[1-yym];
    switch (yyn)
    {
case 2:
#line 126 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].b->top_level(); non_empty_flag = 1; }
break;
case 3:
#line 131 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = yyvsp[0].b; }
break;
case 4:
#line 133 "/u/jjc/groff/eqn/eqn.y"
{
		  list_box *lb = yyvsp[-1].b->to_list_box();
		  if (!lb)
		    lb = new list_box(yyvsp[-1].b);
		  lb->append(yyvsp[0].b);
		  yyval.b = lb;
		}
break;
case 5:
#line 144 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = yyvsp[0].b; }
break;
case 6:
#line 146 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_mark_box(yyvsp[0].b); }
break;
case 7:
#line 148 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_lineup_box(yyvsp[0].b); }
break;
case 8:
#line 153 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = yyvsp[0].b; }
break;
case 9:
#line 155 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_limit_box(yyvsp[-2].b, 0, yyvsp[0].b); }
break;
case 10:
#line 157 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_limit_box(yyvsp[-2].b, yyvsp[0].b, 0); }
break;
case 11:
#line 159 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_limit_box(yyvsp[-4].b, yyvsp[-2].b, yyvsp[0].b); }
break;
case 12:
#line 161 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_limit_box(yyvsp[-4].b, make_limit_box(yyvsp[-2].b, yyvsp[0].b, 0), 0); }
break;
case 13:
#line 166 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = yyvsp[0].b; }
break;
case 14:
#line 168 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_sqrt_box(yyvsp[0].b); }
break;
case 15:
#line 170 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_over_box(yyvsp[-2].b, yyvsp[0].b); }
break;
case 16:
#line 172 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_small_over_box(yyvsp[-2].b, yyvsp[0].b); }
break;
case 17:
#line 177 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = yyvsp[0].b; }
break;
case 18:
#line 179 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_script_box(yyvsp[-2].b, 0, yyvsp[0].b); }
break;
case 19:
#line 184 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = yyvsp[0].b; }
break;
case 20:
#line 186 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_script_box(yyvsp[-2].b, yyvsp[0].b, 0); }
break;
case 21:
#line 188 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_script_box(yyvsp[-4].b, yyvsp[-2].b, yyvsp[0].b); }
break;
case 22:
#line 193 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = split_text(yyvsp[0].str); }
break;
case 23:
#line 195 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new quoted_text_box(yyvsp[0].str); }
break;
case 24:
#line 197 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = split_text(yyvsp[0].str); }
break;
case 25:
#line 199 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new quoted_text_box(yyvsp[0].str); }
break;
case 26:
#line 201 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new half_space_box; }
break;
case 27:
#line 203 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new space_box; }
break;
case 28:
#line 205 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new tab_box; }
break;
case 29:
#line 207 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = yyvsp[-1].b; }
break;
case 30:
#line 209 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].pb->set_alignment(CENTER_ALIGN); yyval.b = yyvsp[0].pb; }
break;
case 31:
#line 211 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].pb->set_alignment(LEFT_ALIGN); yyval.b = yyvsp[0].pb; }
break;
case 32:
#line 213 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].pb->set_alignment(RIGHT_ALIGN); yyval.b = yyvsp[0].pb; }
break;
case 33:
#line 215 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].pb->set_alignment(CENTER_ALIGN); yyval.b = yyvsp[0].pb; }
break;
case 34:
#line 217 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = yyvsp[-1].mb; }
break;
case 35:
#line 219 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_delim_box(yyvsp[-3].str, yyvsp[-2].b, yyvsp[0].str); }
break;
case 36:
#line 221 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_delim_box(yyvsp[-1].str, yyvsp[0].b, 0); }
break;
case 37:
#line 223 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_overline_box(yyvsp[-1].b); }
break;
case 38:
#line 225 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_underline_box(yyvsp[-1].b); }
break;
case 39:
#line 227 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_prime_box(yyvsp[-1].b); }
break;
case 40:
#line 229 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_accent_box(yyvsp[-2].b, yyvsp[0].b); }
break;
case 41:
#line 231 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_uaccent_box(yyvsp[-2].b, yyvsp[0].b); }
break;
case 42:
#line 233 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new font_box(strsave(get_grfont()), yyvsp[0].b); }
break;
case 43:
#line 235 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new font_box(strsave(get_gbfont()), yyvsp[0].b); }
break;
case 44:
#line 237 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new font_box(strsave(get_gfont()), yyvsp[0].b); }
break;
case 45:
#line 239 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new fat_box(yyvsp[0].b); }
break;
case 46:
#line 241 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new font_box(yyvsp[-1].str, yyvsp[0].b); }
break;
case 47:
#line 243 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new size_box(yyvsp[-1].str, yyvsp[0].b); }
break;
case 48:
#line 245 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new hmotion_box(yyvsp[-1].n, yyvsp[0].b); }
break;
case 49:
#line 247 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new hmotion_box(-yyvsp[-1].n, yyvsp[0].b); }
break;
case 50:
#line 249 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new vmotion_box(yyvsp[-1].n, yyvsp[0].b); }
break;
case 51:
#line 251 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new vmotion_box(-yyvsp[-1].n, yyvsp[0].b); }
break;
case 52:
#line 253 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].b->set_spacing_type(yyvsp[-1].str); yyval.b = yyvsp[0].b; }
break;
case 53:
#line 255 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = new vcenter_box(yyvsp[0].b); }
break;
case 54:
#line 257 "/u/jjc/groff/eqn/eqn.y"
{ yyval.b = make_special_box(yyvsp[-1].str, yyvsp[0].b); }
break;
case 55:
#line 262 "/u/jjc/groff/eqn/eqn.y"
{
		  int n;
		  if (sscanf(yyvsp[0].str, "%d", &n) == 1)
		    yyval.n = n;
		  a_delete yyvsp[0].str;
		}
break;
case 56:
#line 272 "/u/jjc/groff/eqn/eqn.y"
{ yyval.pb = new pile_box(yyvsp[0].b); }
break;
case 57:
#line 274 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[-2].pb->append(yyvsp[0].b); yyval.pb = yyvsp[-2].pb; }
break;
case 58:
#line 279 "/u/jjc/groff/eqn/eqn.y"
{ yyval.pb = yyvsp[-1].pb; }
break;
case 59:
#line 281 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[-1].pb->set_space(yyvsp[-3].n); yyval.pb = yyvsp[-1].pb; }
break;
case 60:
#line 286 "/u/jjc/groff/eqn/eqn.y"
{ yyval.mb = new matrix_box(yyvsp[0].col); }
break;
case 61:
#line 288 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[-1].mb->append(yyvsp[0].col); yyval.mb = yyvsp[-1].mb; }
break;
case 62:
#line 293 "/u/jjc/groff/eqn/eqn.y"
{ yyval.col = new column(yyvsp[0].b); }
break;
case 63:
#line 295 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[-2].col->append(yyvsp[0].b); yyval.col = yyvsp[-2].col; }
break;
case 64:
#line 300 "/u/jjc/groff/eqn/eqn.y"
{ yyval.col = yyvsp[-1].col; }
break;
case 65:
#line 302 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[-1].col->set_space(yyvsp[-3].n); yyval.col = yyvsp[-1].col; }
break;
case 66:
#line 307 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].col->set_alignment(CENTER_ALIGN); yyval.col = yyvsp[0].col; }
break;
case 67:
#line 309 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].col->set_alignment(LEFT_ALIGN); yyval.col = yyvsp[0].col; }
break;
case 68:
#line 311 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].col->set_alignment(RIGHT_ALIGN); yyval.col = yyvsp[0].col; }
break;
case 69:
#line 313 "/u/jjc/groff/eqn/eqn.y"
{ yyvsp[0].col->set_alignment(CENTER_ALIGN); yyval.col = yyvsp[0].col; }
break;
case 70:
#line 317 "/u/jjc/groff/eqn/eqn.y"
{ yyval.str = yyvsp[0].str; }
break;
case 71:
#line 319 "/u/jjc/groff/eqn/eqn.y"
{ yyval.str = yyvsp[0].str; }
break;
case 72:
#line 324 "/u/jjc/groff/eqn/eqn.y"
{ yyval.str = yyvsp[0].str; }
break;
case 73:
#line 326 "/u/jjc/groff/eqn/eqn.y"
{ yyval.str = strsave("{"); }
break;
case 74:
#line 328 "/u/jjc/groff/eqn/eqn.y"
{ yyval.str = strsave("}"); }
break;
#line 1107 "y.tab.c"
    }
    yyssp -= yym;
    yystate = *yyssp;
    yyvsp -= yym;
    yym = yylhs[yyn];
    if (yystate == 0 && yym == 0)
    {
#if YYDEBUG
        if (yydebug)
            printf("yydebug: after reduction, shifting from state 0 to\
 state %d\n", YYFINAL);
#endif
        yystate = YYFINAL;
        *++yyssp = YYFINAL;
        *++yyvsp = yyval;
        if (yychar < 0)
        {
            if ((yychar = yylex()) < 0) yychar = 0;
#if YYDEBUG
            if (yydebug)
            {
                yys = 0;
                if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
                if (!yys) yys = "illegal-symbol";
                printf("yydebug: state %d, reading %d (%s)\n",
                        YYFINAL, yychar, yys);
            }
#endif
        }
        if (yychar == 0) goto yyaccept;
        goto yyloop;
    }
    if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 &&
            yyn <= YYTABLESIZE && yycheck[yyn] == yystate)
        yystate = yytable[yyn];
    else
        yystate = yydgoto[yym];
#if YYDEBUG
    if (yydebug)
        printf("yydebug: after reduction, shifting from state %d \
to state %d\n", *yyssp, yystate);
#endif
    if (yyssp >= yyss + yystacksize - 1)
    {
        goto yyoverflow;
    }
    *++yyssp = yystate;
    *++yyvsp = yyval;
    goto yyloop;
yyoverflow:
    yyerror("yacc stack overflow");
yyabort:
    return (1);
yyaccept:
    return (0);
}