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-rw-r--r--eqn/eqn.cc1311
1 files changed, 1311 insertions, 0 deletions
diff --git a/eqn/eqn.cc b/eqn/eqn.cc
new file mode 100644
index 000000000..bcd1b439d
--- /dev/null
+++ b/eqn/eqn.cc
@@ -0,0 +1,1311 @@
+
+/* A Bison parser, made from eqn.y */
+
+#define YYBISON 1 /* Identify Bison output. */
+
+#define OVER 258
+#define SMALLOVER 259
+#define SQRT 260
+#define SUB 261
+#define SUP 262
+#define LPILE 263
+#define RPILE 264
+#define CPILE 265
+#define PILE 266
+#define LEFT 267
+#define RIGHT 268
+#define TO 269
+#define FROM 270
+#define SIZE 271
+#define FONT 272
+#define ROMAN 273
+#define BOLD 274
+#define ITALIC 275
+#define FAT 276
+#define ACCENT 277
+#define BAR 278
+#define UNDER 279
+#define ABOVE 280
+#define TEXT 281
+#define QUOTED_TEXT 282
+#define FWD 283
+#define BACK 284
+#define DOWN 285
+#define UP 286
+#define MATRIX 287
+#define COL 288
+#define LCOL 289
+#define RCOL 290
+#define CCOL 291
+#define MARK 292
+#define LINEUP 293
+#define TYPE 294
+#define VCENTER 295
+#define PRIME 296
+#define SPLIT 297
+#define NOSPLIT 298
+#define UACCENT 299
+#define SPECIAL 300
+#define SPACE 301
+#define GFONT 302
+#define GSIZE 303
+#define DEFINE 304
+#define NDEFINE 305
+#define TDEFINE 306
+#define SDEFINE 307
+#define UNDEF 308
+#define IFDEF 309
+#define INCLUDE 310
+#define DELIM 311
+#define CHARTYPE 312
+#define SET 313
+#define GRFONT 314
+#define GBFONT 315
+
+#line 19 "eqn.y"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "lib.h"
+#include "box.h"
+extern int non_empty_flag;
+char *strsave(const char *);
+#define YYDEBUG 1
+int yylex();
+void yyerror(const char *);
+
+#line 33 "eqn.y"
+typedef union {
+ char *str;
+ box *b;
+ pile_box *pb;
+ matrix_box *mb;
+ int n;
+ column *col;
+} YYSTYPE;
+
+#ifndef YYLTYPE
+typedef
+ struct yyltype
+ {
+ int timestamp;
+ int first_line;
+ int first_column;
+ int last_line;
+ int last_column;
+ char *text;
+ }
+ yyltype;
+
+#define YYLTYPE yyltype
+#endif
+
+#include <stdio.h>
+
+#ifndef __STDC__
+#define const
+#endif
+
+
+
+#define YYFINAL 142
+#define YYFLAG -32768
+#define YYNTBASE 66
+
+#define YYTRANSLATE(x) ((unsigned)(x) <= 315 ? yytranslate[x] : 83)
+
+static const char yytranslate[] = { 0,
+ 2, 2, 2, 2, 2, 2, 2, 2, 63, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 61, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 64, 2, 65, 62, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 1, 2, 3, 4, 5,
+ 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
+ 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
+ 36, 37, 38, 39, 40, 41, 42, 43, 44, 45,
+ 46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60
+};
+
+#if YYDEBUG != 0
+static const short yyprhs[] = { 0,
+ 0, 1, 3, 5, 8, 10, 13, 16, 18, 22,
+ 26, 32, 38, 40, 43, 47, 51, 53, 57, 59,
+ 63, 69, 71, 73, 76, 79, 81, 83, 85, 89,
+ 92, 95, 98, 101, 106, 112, 116, 119, 122, 125,
+ 129, 133, 136, 139, 142, 145, 149, 153, 157, 161,
+ 165, 169, 173, 176, 180, 182, 184, 188, 192, 197,
+ 199, 202, 204, 208, 212, 217, 220, 223, 226, 229,
+ 231, 233, 235, 237
+};
+
+#endif
+
+static const short yyrhs[] = { -1,
+ 67, 0, 68, 0, 67, 68, 0, 69, 0, 37,
+ 68, 0, 38, 68, 0, 70, 0, 70, 14, 69,
+ 0, 70, 15, 70, 0, 70, 15, 70, 14, 69,
+ 0, 70, 15, 70, 15, 69, 0, 71, 0, 5,
+ 70, 0, 70, 3, 70, 0, 70, 4, 70, 0,
+ 72, 0, 73, 7, 71, 0, 73, 0, 73, 6,
+ 72, 0, 73, 6, 73, 7, 71, 0, 26, 0,
+ 27, 0, 42, 27, 0, 43, 26, 0, 61, 0,
+ 62, 0, 63, 0, 64, 67, 65, 0, 11, 76,
+ 0, 8, 76, 0, 9, 76, 0, 10, 76, 0,
+ 32, 64, 77, 65, 0, 12, 82, 67, 13, 82,
+ 0, 12, 82, 67, 0, 73, 23, 0, 73, 24,
+ 0, 73, 41, 0, 73, 22, 73, 0, 73, 44,
+ 73, 0, 18, 73, 0, 19, 73, 0, 20, 73,
+ 0, 21, 73, 0, 17, 81, 73, 0, 16, 81,
+ 73, 0, 28, 74, 73, 0, 29, 74, 73, 0,
+ 31, 74, 73, 0, 30, 74, 73, 0, 39, 81,
+ 73, 0, 40, 73, 0, 45, 81, 73, 0, 81,
+ 0, 67, 0, 75, 25, 67, 0, 64, 75, 65,
+ 0, 74, 64, 75, 65, 0, 80, 0, 77, 80,
+ 0, 67, 0, 78, 25, 67, 0, 64, 78, 65,
+ 0, 74, 64, 78, 65, 0, 33, 79, 0, 34,
+ 79, 0, 35, 79, 0, 36, 79, 0, 26, 0,
+ 27, 0, 81, 0, 64, 0, 65, 0
+};
+
+#if YYDEBUG != 0
+static const short yyrline[] = { 0,
+ 124, 126, 130, 133, 143, 146, 148, 152, 155, 157,
+ 159, 161, 165, 168, 170, 172, 176, 179, 183, 186,
+ 188, 192, 195, 197, 199, 201, 203, 205, 207, 209,
+ 211, 213, 215, 217, 219, 221, 223, 225, 227, 229,
+ 231, 233, 235, 237, 239, 241, 243, 245, 247, 249,
+ 251, 253, 255, 257, 261, 271, 274, 278, 281, 285,
+ 288, 292, 295, 299, 302, 306, 309, 311, 313, 317,
+ 319, 323, 326, 328
+};
+
+static const char * const yytname[] = { "$","error","$illegal.","OVER","SMALLOVER",
+"SQRT","SUB","SUP","LPILE","RPILE","CPILE","PILE","LEFT","RIGHT","TO","FROM",
+"SIZE","FONT","ROMAN","BOLD","ITALIC","FAT","ACCENT","BAR","UNDER","ABOVE","TEXT",
+"QUOTED_TEXT","FWD","BACK","DOWN","UP","MATRIX","COL","LCOL","RCOL","CCOL","MARK",
+"LINEUP","TYPE","VCENTER","PRIME","SPLIT","NOSPLIT","UACCENT","SPECIAL","SPACE",
+"GFONT","GSIZE","DEFINE","NDEFINE","TDEFINE","SDEFINE","UNDEF","IFDEF","INCLUDE",
+"DELIM","CHARTYPE","SET","GRFONT","GBFONT","'^'","'~'","'\\t'","'{'","'}'","top",
+"equation","mark","from_to","sqrt_over","script","nonsup","simple","number",
+"pile_element_list","pile_arg","column_list","column_element_list","column_arg",
+"column","text","delim",""
+};
+#endif
+
+static const short yyr1[] = { 0,
+ 66, 66, 67, 67, 68, 68, 68, 69, 69, 69,
+ 69, 69, 70, 70, 70, 70, 71, 71, 72, 72,
+ 72, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+ 73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+ 73, 73, 73, 73, 73, 73, 73, 73, 73, 73,
+ 73, 73, 73, 73, 74, 75, 75, 76, 76, 77,
+ 77, 78, 78, 79, 79, 80, 80, 80, 80, 81,
+ 81, 82, 82, 82
+};
+
+static const short yyr2[] = { 0,
+ 0, 1, 1, 2, 1, 2, 2, 1, 3, 3,
+ 5, 5, 1, 2, 3, 3, 1, 3, 1, 3,
+ 5, 1, 1, 2, 2, 1, 1, 1, 3, 2,
+ 2, 2, 2, 4, 5, 3, 2, 2, 2, 3,
+ 3, 2, 2, 2, 2, 3, 3, 3, 3, 3,
+ 3, 3, 2, 3, 1, 1, 3, 3, 4, 1,
+ 2, 1, 3, 3, 4, 2, 2, 2, 2, 1,
+ 1, 1, 1, 1
+};
+
+static const short yydefact[] = { 1,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 22, 23, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 26, 27, 28, 0,
+ 2, 3, 5, 8, 13, 17, 19, 14, 70, 71,
+ 0, 0, 31, 55, 32, 33, 30, 73, 74, 72,
+ 0, 0, 0, 42, 43, 44, 45, 0, 0, 0,
+ 0, 0, 6, 7, 0, 53, 24, 25, 0, 0,
+ 4, 0, 0, 0, 0, 0, 0, 0, 37, 38,
+ 39, 0, 56, 0, 0, 36, 47, 46, 48, 49,
+ 51, 50, 0, 0, 0, 0, 0, 60, 52, 54,
+ 29, 15, 16, 9, 10, 20, 19, 18, 40, 41,
+ 0, 58, 0, 0, 0, 0, 66, 67, 68, 69,
+ 34, 61, 0, 0, 0, 57, 59, 35, 62, 0,
+ 0, 11, 12, 21, 0, 64, 0, 63, 65, 0,
+ 0, 0
+};
+
+static const short yydefgoto[] = { 140,
+ 83, 32, 33, 34, 35, 36, 37, 42, 84, 43,
+ 97, 130, 117, 98, 44, 51
+};
+
+static const short yypact[] = { 228,
+ 267, 8, 8, 8, 8, 6, 68, 68, 306, 306,
+ 306, 306,-32768,-32768, 68, 68, 68, 68, -51, 228,
+ 228, 68, 306, -12, 5, 68,-32768,-32768,-32768, 228,
+ 228,-32768,-32768, 25,-32768,-32768, 58,-32768,-32768,-32768,
+ 228, -46,-32768,-32768,-32768,-32768,-32768,-32768,-32768,-32768,
+ 228, 306, 306, 81, 81, 81, 81, 306, 306, 306,
+ 306, 83,-32768,-32768, 306, 81,-32768,-32768, 306, 128,
+-32768, 267, 267, 267, 267, 306, 306, 306,-32768,-32768,
+-32768, 306, 228, -9, 228, 189, 81, 81, 81, 81,
+ 81, 81, 11, 11, 11, 11, 12,-32768, 81, 81,
+-32768,-32768,-32768,-32768, 64,-32768, 333,-32768,-32768,-32768,
+ 228,-32768, -8, 6, 228, -38,-32768,-32768,-32768,-32768,
+-32768,-32768, 267, 267, 306, 228,-32768,-32768, 228, -6,
+ 228,-32768,-32768,-32768, 228,-32768, -5, 228,-32768, 27,
+ 36,-32768
+};
+
+static const short yypgoto[] = {-32768,
+ 0, -17, -62, 1, -76, -26, 32, -7, -33, 19,
+-32768, -77, 33, -39, -1, -31
+};
+
+
+#define YYLAST 377
+
+
+static const short yytable[] = { 31,
+ 108, 38, 63, 64, 50, 52, 53, 58, 59, 60,
+ 61, 104, 62, 71, 67, 111, 111, 85, 135, 135,
+ 65, 45, 46, 47, 69, 131, 141, 72, 73, 70,
+ 68, 39, 40, 39, 40, 142, 39, 40, 74, 75,
+ 54, 55, 56, 57, 93, 94, 95, 96, 134, 106,
+ 86, 113, 71, 137, 66, 112, 127, 122, 136, 139,
+ 132, 133, 0, 76, 77, 71, 72, 73, 71, 48,
+ 49, 41, 102, 103, 115, 105, 121, 123, 124, 78,
+ 79, 80, 128, 87, 88, 116, 116, 116, 116, 89,
+ 90, 91, 92, 39, 40, 0, 99, 0, 81, 0,
+ 100, 82, 78, 79, 80, 0, 0, 107, 71, 109,
+ 126, 71, 50, 110, 129, 93, 94, 95, 96, 0,
+ 71, 81, 0, 0, 82, 0, 118, 119, 120, 0,
+ 129, 0, 1, 0, 138, 2, 3, 4, 5, 6,
+ 0, 0, 0, 7, 8, 9, 10, 11, 12, 0,
+ 0, 0, 0, 13, 14, 15, 16, 17, 18, 19,
+ 0, 0, 0, 0, 20, 21, 22, 23, 0, 24,
+ 25, 0, 26, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 27, 28,
+ 29, 30, 101, 1, 0, 0, 2, 3, 4, 5,
+ 6, 114, 0, 0, 7, 8, 9, 10, 11, 12,
+ 0, 0, 0, 0, 13, 14, 15, 16, 17, 18,
+ 19, 0, 0, 0, 0, 20, 21, 22, 23, 0,
+ 24, 25, 1, 26, 0, 2, 3, 4, 5, 6,
+ 0, 0, 0, 7, 8, 9, 10, 11, 12, 27,
+ 28, 29, 30, 13, 14, 15, 16, 17, 18, 19,
+ 0, 0, 0, 0, 20, 21, 22, 23, 0, 24,
+ 25, 1, 26, 0, 2, 3, 4, 5, 6, 0,
+ 0, 0, 7, 8, 9, 10, 11, 12, 27, 28,
+ 29, 30, 13, 14, 15, 16, 17, 18, 19, 0,
+ 0, 0, 0, 0, 0, 22, 23, 0, 24, 25,
+ 0, 26, 0, 2, 3, 4, 5, 6, 0, 0,
+ 0, 7, 8, 9, 10, 11, 12, 27, 28, 29,
+ 30, 13, 14, 15, 16, 17, 18, 19, 76, 125,
+ 0, 0, 0, 0, 22, 23, 0, 24, 25, 0,
+ 26, 0, 0, 0, 78, 79, 80, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 27, 28, 29, 30,
+ 0, 0, 0, 81, 0, 0, 82
+};
+
+static const short yycheck[] = { 0,
+ 77, 1, 20, 21, 6, 7, 8, 15, 16, 17,
+ 18, 74, 64, 31, 27, 25, 25, 64, 25, 25,
+ 22, 3, 4, 5, 26, 64, 0, 3, 4, 30,
+ 26, 26, 27, 26, 27, 0, 26, 27, 14, 15,
+ 9, 10, 11, 12, 33, 34, 35, 36, 125, 76,
+ 51, 85, 70, 131, 23, 65, 65, 97, 65, 65,
+ 123, 124, -1, 6, 7, 83, 3, 4, 86, 64,
+ 65, 64, 72, 73, 64, 75, 65, 14, 15, 22,
+ 23, 24, 114, 52, 53, 93, 94, 95, 96, 58,
+ 59, 60, 61, 26, 27, -1, 65, -1, 41, -1,
+ 69, 44, 22, 23, 24, -1, -1, 76, 126, 78,
+ 111, 129, 114, 82, 115, 33, 34, 35, 36, -1,
+ 138, 41, -1, -1, 44, -1, 94, 95, 96, -1,
+ 131, -1, 5, -1, 135, 8, 9, 10, 11, 12,
+ -1, -1, -1, 16, 17, 18, 19, 20, 21, -1,
+ -1, -1, -1, 26, 27, 28, 29, 30, 31, 32,
+ -1, -1, -1, -1, 37, 38, 39, 40, -1, 42,
+ 43, -1, 45, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, 61, 62,
+ 63, 64, 65, 5, -1, -1, 8, 9, 10, 11,
+ 12, 13, -1, -1, 16, 17, 18, 19, 20, 21,
+ -1, -1, -1, -1, 26, 27, 28, 29, 30, 31,
+ 32, -1, -1, -1, -1, 37, 38, 39, 40, -1,
+ 42, 43, 5, 45, -1, 8, 9, 10, 11, 12,
+ -1, -1, -1, 16, 17, 18, 19, 20, 21, 61,
+ 62, 63, 64, 26, 27, 28, 29, 30, 31, 32,
+ -1, -1, -1, -1, 37, 38, 39, 40, -1, 42,
+ 43, 5, 45, -1, 8, 9, 10, 11, 12, -1,
+ -1, -1, 16, 17, 18, 19, 20, 21, 61, 62,
+ 63, 64, 26, 27, 28, 29, 30, 31, 32, -1,
+ -1, -1, -1, -1, -1, 39, 40, -1, 42, 43,
+ -1, 45, -1, 8, 9, 10, 11, 12, -1, -1,
+ -1, 16, 17, 18, 19, 20, 21, 61, 62, 63,
+ 64, 26, 27, 28, 29, 30, 31, 32, 6, 7,
+ -1, -1, -1, -1, 39, 40, -1, 42, 43, -1,
+ 45, -1, -1, -1, 22, 23, 24, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, 61, 62, 63, 64,
+ -1, -1, -1, 41, -1, -1, 44
+};
+/* -*-C-*- Note some compilers choke on comments on `#line' lines. */
+#line 3 "/usr/local/lib/bison.simple"
+
+/* Skeleton output parser for bison,
+ Copyright (C) 1984, 1989, 1990 Bob Corbett and Richard Stallman
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+#ifndef alloca
+#ifdef __GNUC__
+#define alloca __builtin_alloca
+#else /* not GNU C. */
+#if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc)
+#include <alloca.h>
+#else /* not sparc */
+#if defined (MSDOS) && !defined (__TURBOC__)
+#include <malloc.h>
+#else /* not MSDOS, or __TURBOC__ */
+#if defined(_AIX)
+#include <malloc.h>
+ #pragma alloca
+#endif /* not _AIX */
+#endif /* not MSDOS, or __TURBOC__ */
+#endif /* not sparc. */
+#endif /* not GNU C. */
+#endif /* alloca not defined. */
+
+/* This is the parser code that is written into each bison parser
+ when the %semantic_parser declaration is not specified in the grammar.
+ It was written by Richard Stallman by simplifying the hairy parser
+ used when %semantic_parser is specified. */
+
+/* Note: there must be only one dollar sign in this file.
+ It is replaced by the list of actions, each action
+ as one case of the switch. */
+
+#define yyerrok (yyerrstatus = 0)
+#define yyclearin (yychar = YYEMPTY)
+#define YYEMPTY -2
+#define YYEOF 0
+#define YYACCEPT return(0)
+#define YYABORT return(1)
+#define YYERROR goto yyerrlab1
+/* Like YYERROR except do call yyerror.
+ This remains here temporarily to ease the
+ transition to the new meaning of YYERROR, for GCC.
+ Once GCC version 2 has supplanted version 1, this can go. */
+#define YYFAIL goto yyerrlab
+#define YYRECOVERING() (!!yyerrstatus)
+#define YYBACKUP(token, value) \
+do \
+ if (yychar == YYEMPTY && yylen == 1) \
+ { yychar = (token), yylval = (value); \
+ yychar1 = YYTRANSLATE (yychar); \
+ YYPOPSTACK; \
+ goto yybackup; \
+ } \
+ else \
+ { yyerror ("syntax error: cannot back up"); YYERROR; } \
+while (0)
+
+#define YYTERROR 1
+#define YYERRCODE 256
+
+#ifndef YYPURE
+#define YYLEX yylex()
+#endif
+
+#ifdef YYPURE
+#ifdef YYLSP_NEEDED
+#define YYLEX yylex(&yylval, &yylloc)
+#else
+#define YYLEX yylex(&yylval)
+#endif
+#endif
+
+/* If nonreentrant, generate the variables here */
+
+#ifndef YYPURE
+
+int yychar; /* the lookahead symbol */
+YYSTYPE yylval; /* the semantic value of the */
+ /* lookahead symbol */
+
+#ifdef YYLSP_NEEDED
+YYLTYPE yylloc; /* location data for the lookahead */
+ /* symbol */
+#endif
+
+int yynerrs; /* number of parse errors so far */
+#endif /* not YYPURE */
+
+#if YYDEBUG != 0
+int yydebug; /* nonzero means print parse trace */
+/* Since this is uninitialized, it does not stop multiple parsers
+ from coexisting. */
+#endif
+
+/* YYINITDEPTH indicates the initial size of the parser's stacks */
+
+#ifndef YYINITDEPTH
+#define YYINITDEPTH 200
+#endif
+
+/* YYMAXDEPTH is the maximum size the stacks can grow to
+ (effective only if the built-in stack extension method is used). */
+
+#if YYMAXDEPTH == 0
+#undef YYMAXDEPTH
+#endif
+
+#ifndef YYMAXDEPTH
+#define YYMAXDEPTH 10000
+#endif
+
+#if __GNUC__ > 1 /* GNU C and GNU C++ define this. */
+#define __yy_bcopy(FROM,TO,COUNT) __builtin_memcpy(TO,FROM,COUNT)
+#else /* not GNU C or C++ */
+#ifndef __cplusplus
+
+/* This is the most reliable way to avoid incompatibilities
+ in available built-in functions on various systems. */
+static void
+__yy_bcopy (from, to, count)
+ char *from;
+ char *to;
+ int count;
+{
+ register char *f = from;
+ register char *t = to;
+ register int i = count;
+
+ while (i-- > 0)
+ *t++ = *f++;
+}
+
+#else /* __cplusplus */
+
+/* This is the most reliable way to avoid incompatibilities
+ in available built-in functions on various systems. */
+static void
+__yy_bcopy (char *from, char *to, int count)
+{
+ register char *f = from;
+ register char *t = to;
+ register int i = count;
+
+ while (i-- > 0)
+ *t++ = *f++;
+}
+
+#endif
+#endif
+
+#line 169 "/usr/local/lib/bison.simple"
+int
+yyparse()
+{
+ register int yystate;
+ register int yyn;
+ register short *yyssp;
+ register YYSTYPE *yyvsp;
+ int yyerrstatus; /* number of tokens to shift before error messages enabled */
+ int yychar1; /* lookahead token as an internal (translated) token number */
+
+ short yyssa[YYINITDEPTH]; /* the state stack */
+ YYSTYPE yyvsa[YYINITDEPTH]; /* the semantic value stack */
+
+ short *yyss = yyssa; /* refer to the stacks thru separate pointers */
+ YYSTYPE *yyvs = yyvsa; /* to allow yyoverflow to reallocate them elsewhere */
+
+#ifdef YYLSP_NEEDED
+ YYLTYPE yylsa[YYINITDEPTH]; /* the location stack */
+ YYLTYPE *yyls = yylsa;
+ YYLTYPE *yylsp;
+
+#define YYPOPSTACK (yyvsp--, yyssp--, yylsp--)
+#else
+#define YYPOPSTACK (yyvsp--, yyssp--)
+#endif
+
+ int yystacksize = YYINITDEPTH;
+
+#ifdef YYPURE
+ int yychar;
+ YYSTYPE yylval;
+ int yynerrs;
+#ifdef YYLSP_NEEDED
+ YYLTYPE yylloc;
+#endif
+#endif
+
+ YYSTYPE yyval; /* the variable used to return */
+ /* semantic values from the action */
+ /* routines */
+
+ int yylen;
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Starting parse\n");
+#endif
+
+ yystate = 0;
+ yyerrstatus = 0;
+ yynerrs = 0;
+ yychar = YYEMPTY; /* Cause a token to be read. */
+
+ /* Initialize stack pointers.
+ Waste one element of value and location stack
+ so that they stay on the same level as the state stack. */
+
+ yyssp = yyss - 1;
+ yyvsp = yyvs;
+#ifdef YYLSP_NEEDED
+ yylsp = yyls;
+#endif
+
+/* Push a new state, which is found in yystate . */
+/* In all cases, when you get here, the value and location stacks
+ have just been pushed. so pushing a state here evens the stacks. */
+yynewstate:
+
+ *++yyssp = yystate;
+
+ if (yyssp >= yyss + yystacksize - 1)
+ {
+ /* Give user a chance to reallocate the stack */
+ /* Use copies of these so that the &'s don't force the real ones into memory. */
+ YYSTYPE *yyvs1 = yyvs;
+ short *yyss1 = yyss;
+#ifdef YYLSP_NEEDED
+ YYLTYPE *yyls1 = yyls;
+#endif
+
+ /* Get the current used size of the three stacks, in elements. */
+ int size = yyssp - yyss + 1;
+
+#ifdef yyoverflow
+ /* Each stack pointer address is followed by the size of
+ the data in use in that stack, in bytes. */
+ yyoverflow("parser stack overflow",
+ &yyss1, size * sizeof (*yyssp),
+ &yyvs1, size * sizeof (*yyvsp),
+#ifdef YYLSP_NEEDED
+ &yyls1, size * sizeof (*yylsp),
+#endif
+ &yystacksize);
+
+ yyss = yyss1; yyvs = yyvs1;
+#ifdef YYLSP_NEEDED
+ yyls = yyls1;
+#endif
+#else /* no yyoverflow */
+ /* Extend the stack our own way. */
+ if (yystacksize >= YYMAXDEPTH)
+ {
+ yyerror("parser stack overflow");
+ return 2;
+ }
+ yystacksize *= 2;
+ if (yystacksize > YYMAXDEPTH)
+ yystacksize = YYMAXDEPTH;
+ yyss = (short *) alloca (yystacksize * sizeof (*yyssp));
+ __yy_bcopy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
+ yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
+ __yy_bcopy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
+#ifdef YYLSP_NEEDED
+ yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
+ __yy_bcopy ((char *)yyls1, (char *)yyls, size * sizeof (*yylsp));
+#endif
+#endif /* no yyoverflow */
+
+ yyssp = yyss + size - 1;
+ yyvsp = yyvs + size - 1;
+#ifdef YYLSP_NEEDED
+ yylsp = yyls + size - 1;
+#endif
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Stack size increased to %d\n", yystacksize);
+#endif
+
+ if (yyssp >= yyss + yystacksize - 1)
+ YYABORT;
+ }
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Entering state %d\n", yystate);
+#endif
+
+ yybackup:
+
+/* Do appropriate processing given the current state. */
+/* Read a lookahead token if we need one and don't already have one. */
+/* yyresume: */
+
+ /* First try to decide what to do without reference to lookahead token. */
+
+ yyn = yypact[yystate];
+ if (yyn == YYFLAG)
+ goto yydefault;
+
+ /* Not known => get a lookahead token if don't already have one. */
+
+ /* yychar is either YYEMPTY or YYEOF
+ or a valid token in external form. */
+
+ if (yychar == YYEMPTY)
+ {
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Reading a token: ");
+#endif
+ yychar = YYLEX;
+ }
+
+ /* Convert token to internal form (in yychar1) for indexing tables with */
+
+ if (yychar <= 0) /* This means end of input. */
+ {
+ yychar1 = 0;
+ yychar = YYEOF; /* Don't call YYLEX any more */
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Now at end of input.\n");
+#endif
+ }
+ else
+ {
+ yychar1 = YYTRANSLATE(yychar);
+
+#if YYDEBUG != 0
+ if (yydebug)
+ {
+ fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]);
+ /* Give the individual parser a way to print the precise meaning
+ of a token, for further debugging info. */
+#ifdef YYPRINT
+ YYPRINT (stderr, yychar, yylval);
+#endif
+ fprintf (stderr, ")\n");
+ }
+#endif
+ }
+
+ yyn += yychar1;
+ if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
+ goto yydefault;
+
+ yyn = yytable[yyn];
+
+ /* yyn is what to do for this token type in this state.
+ Negative => reduce, -yyn is rule number.
+ Positive => shift, yyn is new state.
+ New state is final state => don't bother to shift,
+ just return success.
+ 0, or most negative number => error. */
+
+ if (yyn < 0)
+ {
+ if (yyn == YYFLAG)
+ goto yyerrlab;
+ yyn = -yyn;
+ goto yyreduce;
+ }
+ else if (yyn == 0)
+ goto yyerrlab;
+
+ if (yyn == YYFINAL)
+ YYACCEPT;
+
+ /* Shift the lookahead token. */
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]);
+#endif
+
+ /* Discard the token being shifted unless it is eof. */
+ if (yychar != YYEOF)
+ yychar = YYEMPTY;
+
+ *++yyvsp = yylval;
+#ifdef YYLSP_NEEDED
+ *++yylsp = yylloc;
+#endif
+
+ /* count tokens shifted since error; after three, turn off error status. */
+ if (yyerrstatus) yyerrstatus--;
+
+ yystate = yyn;
+ goto yynewstate;
+
+/* Do the default action for the current state. */
+yydefault:
+
+ yyn = yydefact[yystate];
+ if (yyn == 0)
+ goto yyerrlab;
+
+/* Do a reduction. yyn is the number of a rule to reduce with. */
+yyreduce:
+ yylen = yyr2[yyn];
+ yyval = yyvsp[1-yylen]; /* implement default value of the action */
+
+#if YYDEBUG != 0
+ if (yydebug)
+ {
+ int i;
+
+ fprintf (stderr, "Reducing via rule %d (line %d), ",
+ yyn, yyrline[yyn]);
+
+ /* Print the symboles being reduced, and their result. */
+ for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
+ fprintf (stderr, "%s ", yytname[yyrhs[i]]);
+ fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]);
+ }
+#endif
+
+
+ switch (yyn) {
+
+case 2:
+#line 127 "eqn.y"
+{ yyvsp[0].b->top_level(); non_empty_flag = 1; ;
+ break;}
+case 3:
+#line 132 "eqn.y"
+{ yyval.b = yyvsp[0].b; ;
+ break;}
+case 4:
+#line 134 "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 145 "eqn.y"
+{ yyval.b = yyvsp[0].b; ;
+ break;}
+case 6:
+#line 147 "eqn.y"
+{ yyval.b = make_mark_box(yyvsp[0].b); ;
+ break;}
+case 7:
+#line 149 "eqn.y"
+{ yyval.b = make_lineup_box(yyvsp[0].b); ;
+ break;}
+case 8:
+#line 154 "eqn.y"
+{ yyval.b = yyvsp[0].b; ;
+ break;}
+case 9:
+#line 156 "eqn.y"
+{ yyval.b = make_limit_box(yyvsp[-2].b, 0, yyvsp[0].b); ;
+ break;}
+case 10:
+#line 158 "eqn.y"
+{ yyval.b = make_limit_box(yyvsp[-2].b, yyvsp[0].b, 0); ;
+ break;}
+case 11:
+#line 160 "eqn.y"
+{ yyval.b = make_limit_box(yyvsp[-4].b, yyvsp[-2].b, yyvsp[0].b); ;
+ break;}
+case 12:
+#line 162 "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 167 "eqn.y"
+{ yyval.b = yyvsp[0].b; ;
+ break;}
+case 14:
+#line 169 "eqn.y"
+{ yyval.b = make_sqrt_box(yyvsp[0].b); ;
+ break;}
+case 15:
+#line 171 "eqn.y"
+{ yyval.b = make_over_box(yyvsp[-2].b, yyvsp[0].b); ;
+ break;}
+case 16:
+#line 173 "eqn.y"
+{ yyval.b = make_small_over_box(yyvsp[-2].b, yyvsp[0].b); ;
+ break;}
+case 17:
+#line 178 "eqn.y"
+{ yyval.b = yyvsp[0].b; ;
+ break;}
+case 18:
+#line 180 "eqn.y"
+{ yyval.b = make_script_box(yyvsp[-2].b, 0, yyvsp[0].b); ;
+ break;}
+case 19:
+#line 185 "eqn.y"
+{ yyval.b = yyvsp[0].b; ;
+ break;}
+case 20:
+#line 187 "eqn.y"
+{ yyval.b = make_script_box(yyvsp[-2].b, yyvsp[0].b, 0); ;
+ break;}
+case 21:
+#line 189 "eqn.y"
+{ yyval.b = make_script_box(yyvsp[-4].b, yyvsp[-2].b, yyvsp[0].b); ;
+ break;}
+case 22:
+#line 194 "eqn.y"
+{ yyval.b = split_text(yyvsp[0].str); ;
+ break;}
+case 23:
+#line 196 "eqn.y"
+{ yyval.b = new quoted_text_box(yyvsp[0].str); ;
+ break;}
+case 24:
+#line 198 "eqn.y"
+{ yyval.b = split_text(yyvsp[0].str); ;
+ break;}
+case 25:
+#line 200 "eqn.y"
+{ yyval.b = new quoted_text_box(yyvsp[0].str); ;
+ break;}
+case 26:
+#line 202 "eqn.y"
+{ yyval.b = new half_space_box; ;
+ break;}
+case 27:
+#line 204 "eqn.y"
+{ yyval.b = new space_box; ;
+ break;}
+case 28:
+#line 206 "eqn.y"
+{ yyval.b = new tab_box; ;
+ break;}
+case 29:
+#line 208 "eqn.y"
+{ yyval.b = yyvsp[-1].b; ;
+ break;}
+case 30:
+#line 210 "eqn.y"
+{ yyvsp[0].pb->set_alignment(CENTER_ALIGN); yyval.b = yyvsp[0].pb; ;
+ break;}
+case 31:
+#line 212 "eqn.y"
+{ yyvsp[0].pb->set_alignment(LEFT_ALIGN); yyval.b = yyvsp[0].pb; ;
+ break;}
+case 32:
+#line 214 "eqn.y"
+{ yyvsp[0].pb->set_alignment(RIGHT_ALIGN); yyval.b = yyvsp[0].pb; ;
+ break;}
+case 33:
+#line 216 "eqn.y"
+{ yyvsp[0].pb->set_alignment(CENTER_ALIGN); yyval.b = yyvsp[0].pb; ;
+ break;}
+case 34:
+#line 218 "eqn.y"
+{ yyval.b = yyvsp[-1].mb; ;
+ break;}
+case 35:
+#line 220 "eqn.y"
+{ yyval.b = make_delim_box(yyvsp[-3].str, yyvsp[-2].b, yyvsp[0].str); ;
+ break;}
+case 36:
+#line 222 "eqn.y"
+{ yyval.b = make_delim_box(yyvsp[-1].str, yyvsp[0].b, 0); ;
+ break;}
+case 37:
+#line 224 "eqn.y"
+{ yyval.b = make_overline_box(yyvsp[-1].b); ;
+ break;}
+case 38:
+#line 226 "eqn.y"
+{ yyval.b = make_underline_box(yyvsp[-1].b); ;
+ break;}
+case 39:
+#line 228 "eqn.y"
+{ yyval.b = make_prime_box(yyvsp[-1].b); ;
+ break;}
+case 40:
+#line 230 "eqn.y"
+{ yyval.b = make_accent_box(yyvsp[-2].b, yyvsp[0].b); ;
+ break;}
+case 41:
+#line 232 "eqn.y"
+{ yyval.b = make_uaccent_box(yyvsp[-2].b, yyvsp[0].b); ;
+ break;}
+case 42:
+#line 234 "eqn.y"
+{ yyval.b = new font_box(strsave(get_grfont()), yyvsp[0].b); ;
+ break;}
+case 43:
+#line 236 "eqn.y"
+{ yyval.b = new font_box(strsave(get_gbfont()), yyvsp[0].b); ;
+ break;}
+case 44:
+#line 238 "eqn.y"
+{ yyval.b = new font_box(strsave(get_gfont()), yyvsp[0].b); ;
+ break;}
+case 45:
+#line 240 "eqn.y"
+{ yyval.b = new fat_box(yyvsp[0].b); ;
+ break;}
+case 46:
+#line 242 "eqn.y"
+{ yyval.b = new font_box(yyvsp[-1].str, yyvsp[0].b); ;
+ break;}
+case 47:
+#line 244 "eqn.y"
+{ yyval.b = new size_box(yyvsp[-1].str, yyvsp[0].b); ;
+ break;}
+case 48:
+#line 246 "eqn.y"
+{ yyval.b = new hmotion_box(yyvsp[-1].n, yyvsp[0].b); ;
+ break;}
+case 49:
+#line 248 "eqn.y"
+{ yyval.b = new hmotion_box(-yyvsp[-1].n, yyvsp[0].b); ;
+ break;}
+case 50:
+#line 250 "eqn.y"
+{ yyval.b = new vmotion_box(yyvsp[-1].n, yyvsp[0].b); ;
+ break;}
+case 51:
+#line 252 "eqn.y"
+{ yyval.b = new vmotion_box(-yyvsp[-1].n, yyvsp[0].b); ;
+ break;}
+case 52:
+#line 254 "eqn.y"
+{ yyvsp[0].b->set_spacing_type(yyvsp[-1].str); yyval.b = yyvsp[0].b; ;
+ break;}
+case 53:
+#line 256 "eqn.y"
+{ yyval.b = new vcenter_box(yyvsp[0].b); ;
+ break;}
+case 54:
+#line 258 "eqn.y"
+{ yyval.b = make_special_box(yyvsp[-1].str, yyvsp[0].b); ;
+ break;}
+case 55:
+#line 263 "eqn.y"
+{
+ int n;
+ if (sscanf(yyvsp[0].str, "%d", &n) == 1)
+ yyval.n = n;
+ a_delete yyvsp[0].str;
+ ;
+ break;}
+case 56:
+#line 273 "eqn.y"
+{ yyval.pb = new pile_box(yyvsp[0].b); ;
+ break;}
+case 57:
+#line 275 "eqn.y"
+{ yyvsp[-2].pb->append(yyvsp[0].b); yyval.pb = yyvsp[-2].pb; ;
+ break;}
+case 58:
+#line 280 "eqn.y"
+{ yyval.pb = yyvsp[-1].pb; ;
+ break;}
+case 59:
+#line 282 "eqn.y"
+{ yyvsp[-1].pb->set_space(yyvsp[-3].n); yyval.pb = yyvsp[-1].pb; ;
+ break;}
+case 60:
+#line 287 "eqn.y"
+{ yyval.mb = new matrix_box(yyvsp[0].col); ;
+ break;}
+case 61:
+#line 289 "eqn.y"
+{ yyvsp[-1].mb->append(yyvsp[0].col); yyval.mb = yyvsp[-1].mb; ;
+ break;}
+case 62:
+#line 294 "eqn.y"
+{ yyval.col = new column(yyvsp[0].b); ;
+ break;}
+case 63:
+#line 296 "eqn.y"
+{ yyvsp[-2].col->append(yyvsp[0].b); yyval.col = yyvsp[-2].col; ;
+ break;}
+case 64:
+#line 301 "eqn.y"
+{ yyval.col = yyvsp[-1].col; ;
+ break;}
+case 65:
+#line 303 "eqn.y"
+{ yyvsp[-1].col->set_space(yyvsp[-3].n); yyval.col = yyvsp[-1].col; ;
+ break;}
+case 66:
+#line 308 "eqn.y"
+{ yyvsp[0].col->set_alignment(CENTER_ALIGN); yyval.col = yyvsp[0].col; ;
+ break;}
+case 67:
+#line 310 "eqn.y"
+{ yyvsp[0].col->set_alignment(LEFT_ALIGN); yyval.col = yyvsp[0].col; ;
+ break;}
+case 68:
+#line 312 "eqn.y"
+{ yyvsp[0].col->set_alignment(RIGHT_ALIGN); yyval.col = yyvsp[0].col; ;
+ break;}
+case 69:
+#line 314 "eqn.y"
+{ yyvsp[0].col->set_alignment(CENTER_ALIGN); yyval.col = yyvsp[0].col; ;
+ break;}
+case 70:
+#line 318 "eqn.y"
+{ yyval.str = yyvsp[0].str; ;
+ break;}
+case 71:
+#line 320 "eqn.y"
+{ yyval.str = yyvsp[0].str; ;
+ break;}
+case 72:
+#line 325 "eqn.y"
+{ yyval.str = yyvsp[0].str; ;
+ break;}
+case 73:
+#line 327 "eqn.y"
+{ yyval.str = strsave("{"); ;
+ break;}
+case 74:
+#line 329 "eqn.y"
+{ yyval.str = strsave("}"); ;
+ break;}
+}
+ /* the action file gets copied in in place of this dollarsign */
+#line 440 "/usr/local/lib/bison.simple"
+
+ yyvsp -= yylen;
+ yyssp -= yylen;
+#ifdef YYLSP_NEEDED
+ yylsp -= yylen;
+#endif
+
+#if YYDEBUG != 0
+ if (yydebug)
+ {
+ short *ssp1 = yyss - 1;
+ fprintf (stderr, "state stack now");
+ while (ssp1 != yyssp)
+ fprintf (stderr, " %d", *++ssp1);
+ fprintf (stderr, "\n");
+ }
+#endif
+
+ *++yyvsp = yyval;
+
+#ifdef YYLSP_NEEDED
+ yylsp++;
+ if (yylen == 0)
+ {
+ yylsp->first_line = yylloc.first_line;
+ yylsp->first_column = yylloc.first_column;
+ yylsp->last_line = (yylsp-1)->last_line;
+ yylsp->last_column = (yylsp-1)->last_column;
+ yylsp->text = 0;
+ }
+ else
+ {
+ yylsp->last_line = (yylsp+yylen-1)->last_line;
+ yylsp->last_column = (yylsp+yylen-1)->last_column;
+ }
+#endif
+
+ /* Now "shift" the result of the reduction.
+ Determine what state that goes to,
+ based on the state we popped back to
+ and the rule number reduced by. */
+
+ yyn = yyr1[yyn];
+
+ yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
+ if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
+ yystate = yytable[yystate];
+ else
+ yystate = yydefgoto[yyn - YYNTBASE];
+
+ goto yynewstate;
+
+yyerrlab: /* here on detecting error */
+
+ if (! yyerrstatus)
+ /* If not already recovering from an error, report this error. */
+ {
+ ++yynerrs;
+
+#ifdef YYERROR_VERBOSE
+ yyn = yypact[yystate];
+
+ if (yyn > YYFLAG && yyn < YYLAST)
+ {
+ int size = 0;
+ char *msg;
+ int x, count;
+
+ count = 0;
+ for (x = 0; x < (sizeof(yytname) / sizeof(char *)); x++)
+ if (yycheck[x + yyn] == x)
+ size += strlen(yytname[x]) + 15, count++;
+ msg = (char *) malloc(size + 15);
+ if (msg != 0)
+ {
+ strcpy(msg, "parse error");
+
+ if (count < 5)
+ {
+ count = 0;
+ for (x = 0; x < (sizeof(yytname) / sizeof(char *)); x++)
+ if (yycheck[x + yyn] == x)
+ {
+ strcat(msg, count == 0 ? ", expecting `" : " or `");
+ strcat(msg, yytname[x]);
+ strcat(msg, "'");
+ count++;
+ }
+ }
+ yyerror(msg);
+ free(msg);
+ }
+ else
+ yyerror ("parse error; also virtual memory exceeded");
+ }
+ else
+#endif /* YYERROR_VERBOSE */
+ yyerror("parse error");
+ }
+
+yyerrlab1: /* here on error raised explicitly by an action */
+
+ if (yyerrstatus == 3)
+ {
+ /* if just tried and failed to reuse lookahead token after an error, discard it. */
+
+ /* return failure if at end of input */
+ if (yychar == YYEOF)
+ YYABORT;
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Discarding token %d (%s).\n", yychar, yytname[yychar1]);
+#endif
+
+ yychar = YYEMPTY;
+ }
+
+ /* Else will try to reuse lookahead token
+ after shifting the error token. */
+
+ yyerrstatus = 3; /* Each real token shifted decrements this */
+
+ goto yyerrhandle;
+
+yyerrdefault: /* current state does not do anything special for the error token. */
+
+#if 0
+ /* This is wrong; only states that explicitly want error tokens
+ should shift them. */
+ yyn = yydefact[yystate]; /* If its default is to accept any token, ok. Otherwise pop it.*/
+ if (yyn) goto yydefault;
+#endif
+
+yyerrpop: /* pop the current state because it cannot handle the error token */
+
+ if (yyssp == yyss) YYABORT;
+ yyvsp--;
+ yystate = *--yyssp;
+#ifdef YYLSP_NEEDED
+ yylsp--;
+#endif
+
+#if YYDEBUG != 0
+ if (yydebug)
+ {
+ short *ssp1 = yyss - 1;
+ fprintf (stderr, "Error: state stack now");
+ while (ssp1 != yyssp)
+ fprintf (stderr, " %d", *++ssp1);
+ fprintf (stderr, "\n");
+ }
+#endif
+
+yyerrhandle:
+
+ yyn = yypact[yystate];
+ if (yyn == YYFLAG)
+ goto yyerrdefault;
+
+ yyn += YYTERROR;
+ if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
+ goto yyerrdefault;
+
+ yyn = yytable[yyn];
+ if (yyn < 0)
+ {
+ if (yyn == YYFLAG)
+ goto yyerrpop;
+ yyn = -yyn;
+ goto yyreduce;
+ }
+ else if (yyn == 0)
+ goto yyerrpop;
+
+ if (yyn == YYFINAL)
+ YYACCEPT;
+
+#if YYDEBUG != 0
+ if (yydebug)
+ fprintf(stderr, "Shifting error token, ");
+#endif
+
+ *++yyvsp = yylval;
+#ifdef YYLSP_NEEDED
+ *++yylsp = yylloc;
+#endif
+
+ yystate = yyn;
+ goto yynewstate;
+}
+#line 332 "eqn.y"
+
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