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- /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
-
- /* A Bison parser, made from expr.y with Bison version GNU Bison version 1.22
- */
-
- #define YYBISON 1 /* Identify Bison output. */
-
- #define NUM 258
- #define OP_LOR 259
- #define OP_LAND 260
- #define OP_EQ 261
- #define OP_NE 262
- #define OP_LE 263
- #define OP_GE 264
- #define OP_SHL 265
- #define OP_SHR 266
- #define OP_NEG 267
- #define OP_LNOT 268
- #define OP_NOT 269
-
- #line 1 "expr.y"
-
-
- #include <ctype.h>
- #include <stdio.h>
- #include <string.h>
- #ifndef TEST
- #include "ed.h"
- #include <debug/syms.h>
- #endif
- #define YYSTYPE long
-
-
- #ifdef TEST
- unsigned long syms_name2val (char *);
- int main (int, char **);
- int undefined_symbol = 0;
- #define valid_addr(x,y) 0
- #define read_child (void)
- #endif
- int evaluate (char *, long *, char **);
- static int yylex ();
- static void yyerror (char *);
-
- static long result;
- static char *input;
- static char *error;
-
-
- #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
-
- #ifndef YYSTYPE
- #define YYSTYPE int
- #endif
- #include <stdio.h>
-
- #ifndef __cplusplus
- #ifndef __STDC__
- #define const
- #endif
- #endif
-
-
-
- #define YYFINAL 55
- #define YYFLAG -32768
- #define YYNTBASE 32
-
- #define YYTRANSLATE(x) ((unsigned)(x) <= 269 ? yytranslate[x] : 34)
-
- static const char yytranslate[] = { 0,
- 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, 26, 2, 2, 2, 21, 8, 2, 28,
- 29, 19, 17, 2, 18, 2, 20, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 22, 2, 10,
- 2, 11, 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,
- 30, 2, 31, 6, 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, 5, 2, 27, 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, 7,
- 9, 12, 13, 14, 15, 16, 23, 24, 25
- };
-
- #if YYDEBUG != 0
- static const short yyprhs[] = { 0,
- 0, 2, 4, 8, 12, 16, 20, 24, 28, 32,
- 36, 40, 44, 48, 52, 56, 60, 64, 68, 72,
- 76, 79, 82, 85, 89, 93
- };
-
- static const short yyrhs[] = { 33,
- 0, 3, 0, 33, 4, 33, 0, 33, 7, 33,
- 0, 33, 5, 33, 0, 33, 8, 33, 0, 33,
- 6, 33, 0, 33, 9, 33, 0, 33, 11, 33,
- 0, 33, 10, 33, 0, 33, 14, 33, 0, 33,
- 13, 33, 0, 33, 12, 33, 0, 33, 15, 33,
- 0, 33, 16, 33, 0, 33, 17, 33, 0, 33,
- 18, 33, 0, 33, 19, 33, 0, 33, 20, 33,
- 0, 33, 21, 33, 0, 18, 33, 0, 26, 33,
- 0, 27, 33, 0, 28, 33, 29, 0, 30, 33,
- 31, 0, 33, 22, 3, 0
- };
-
- #endif
-
- #if YYDEBUG != 0
- static const short yyrline[] = { 0,
- 46, 49, 50, 51, 52, 53, 54, 55, 56, 57,
- 58, 59, 60, 61, 62, 63, 64, 65, 66, 68,
- 70, 71, 72, 73, 74, 80
- };
-
- static const char * const yytname[] = { "$","error","$illegal.","NUM","OP_LOR",
- "'|'","'^'","OP_LAND","'&'","OP_EQ","'<'","'>'","OP_NE","OP_LE","OP_GE","OP_SHL",
- "OP_SHR","'+'","'-'","'*'","'/'","'%'","':'","OP_NEG","OP_LNOT","OP_NOT","'!'",
- "'~'","'('","')'","'['","']'","main","expr",""
- };
- #endif
-
- static const short yyr1[] = { 0,
- 32, 33, 33, 33, 33, 33, 33, 33, 33, 33,
- 33, 33, 33, 33, 33, 33, 33, 33, 33, 33,
- 33, 33, 33, 33, 33, 33
- };
-
- static const short yyr2[] = { 0,
- 1, 1, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 2, 2, 2, 3, 3, 3
- };
-
- static const short yydefact[] = { 0,
- 2, 0, 0, 0, 0, 0, 1, 21, 22, 23,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 24, 25, 3, 5, 7, 4, 6, 8, 10,
- 9, 13, 12, 11, 14, 15, 16, 17, 18, 19,
- 20, 26, 0, 0, 0
- };
-
- static const short yydefgoto[] = { 53,
- 7
- };
-
- static const short yypact[] = { 45,
- -32768, 45, 45, 45, 45, 45, 98,-32768,-32768,-32768,
- 72, 25, 45, 45, 45, 45, 45, 45, 45, 45,
- 45, 45, 45, 45, 45, 45, 45, 45, 45, 45,
- 50,-32768,-32768, 114, 114, 114, 128, 128, 142, 142,
- 142, 142, 142, 142, -12, -12, 30, 30, 32, 32,
- 32,-32768, 55, 57,-32768
- };
-
- static const short yypgoto[] = {-32768,
- -2
- };
-
-
- #define YYLAST 164
-
-
- static const short yytable[] = { 8,
- 9, 10, 11, 12, 26, 27, 28, 29, 30, 31,
- 34, 35, 36, 37, 38, 39, 40, 41, 42, 43,
- 44, 45, 46, 47, 48, 49, 50, 51, 13, 14,
- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
- 25, 26, 27, 28, 29, 30, 31, 1, 28, 29,
- 30, 31, 52, 31, 54, 33, 55, 0, 0, 0,
- 0, 0, 2, 0, 0, 0, 0, 0, 0, 0,
- 3, 4, 5, 0, 6, 13, 14, 15, 16, 17,
- 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
- 28, 29, 30, 31, 0, 0, 0, 0, 0, 0,
- 32, 13, 14, 15, 16, 17, 18, 19, 20, 21,
- 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
- 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
- 26, 27, 28, 29, 30, 31, 18, 19, 20, 21,
- 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
- -32768,-32768,-32768,-32768,-32768,-32768, 24, 25, 26, 27,
- 28, 29, 30, 31
- };
-
- static const short yycheck[] = { 2,
- 3, 4, 5, 6, 17, 18, 19, 20, 21, 22,
- 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
- 23, 24, 25, 26, 27, 28, 29, 30, 4, 5,
- 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
- 16, 17, 18, 19, 20, 21, 22, 3, 19, 20,
- 21, 22, 3, 22, 0, 31, 0, -1, -1, -1,
- -1, -1, 18, -1, -1, -1, -1, -1, -1, -1,
- 26, 27, 28, -1, 30, 4, 5, 6, 7, 8,
- 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
- 19, 20, 21, 22, -1, -1, -1, -1, -1, -1,
- 29, 4, 5, 6, 7, 8, 9, 10, 11, 12,
- 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
- 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
- 17, 18, 19, 20, 21, 22, 9, 10, 11, 12,
- 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
- 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
- 19, 20, 21, 22
- };
- /* -*-C-*- Note some compilers choke on comments on `#line' lines. */
- #line 3 "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 1, 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) || defined (__sgi)
- #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
- #else /* not MSDOS, __TURBOC__, or _AIX */
- #ifdef __hpux
- #ifdef __cplusplus
- extern "C" {
- void *alloca (unsigned int);
- };
- #else /* not __cplusplus */
- void *alloca ();
- #endif /* not __cplusplus */
- #endif /* __hpux */
- #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
-
- /* Prevent warning if -Wstrict-prototypes. */
- #ifdef __GNUC__
- int yyparse (void);
- #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 184 "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 = 0; /* 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.
- The wasted elements are never initialized. */
-
- 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. */
- #ifdef YYLSP_NEEDED
- /* This used to be a conditional around just the two extra args,
- but that might be undefined if yyoverflow is a macro. */
- yyoverflow("parser stack overflow",
- &yyss1, size * sizeof (*yyssp),
- &yyvs1, size * sizeof (*yyvsp),
- &yyls1, size * sizeof (*yylsp),
- &yystacksize);
- #else
- yyoverflow("parser stack overflow",
- &yyss1, size * sizeof (*yyssp),
- &yyvs1, size * sizeof (*yyvsp),
- &yystacksize);
- #endif
-
- 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
-
- goto yybackup;
- 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];
- if (yylen > 0)
- 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 symbols 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 1:
- #line 46 "expr.y"
- { result = yyvsp[0]; ;
- break;}
- case 2:
- #line 49 "expr.y"
- { yyval = yyvsp[0]; ;
- break;}
- case 3:
- #line 50 "expr.y"
- { yyval = yyvsp[-2] || yyvsp[0]; ;
- break;}
- case 4:
- #line 51 "expr.y"
- { yyval = yyvsp[-2] && yyvsp[0]; ;
- break;}
- case 5:
- #line 52 "expr.y"
- { yyval = yyvsp[-2] | yyvsp[0]; ;
- break;}
- case 6:
- #line 53 "expr.y"
- { yyval = yyvsp[-2] & yyvsp[0]; ;
- break;}
- case 7:
- #line 54 "expr.y"
- { yyval = yyvsp[-2] ^ yyvsp[0]; ;
- break;}
- case 8:
- #line 55 "expr.y"
- { yyval = yyvsp[-2] == yyvsp[0]; ;
- break;}
- case 9:
- #line 56 "expr.y"
- { yyval = yyvsp[-2] > yyvsp[0]; ;
- break;}
- case 10:
- #line 57 "expr.y"
- { yyval = yyvsp[-2] < yyvsp[0]; ;
- break;}
- case 11:
- #line 58 "expr.y"
- { yyval = yyvsp[-2] >= yyvsp[0]; ;
- break;}
- case 12:
- #line 59 "expr.y"
- { yyval = yyvsp[-2] <= yyvsp[0]; ;
- break;}
- case 13:
- #line 60 "expr.y"
- { yyval = yyvsp[-2] != yyvsp[0]; ;
- break;}
- case 14:
- #line 61 "expr.y"
- { yyval = (unsigned)yyvsp[-2] << yyvsp[0]; ;
- break;}
- case 15:
- #line 62 "expr.y"
- { yyval = (unsigned)yyvsp[-2] >> yyvsp[0]; ;
- break;}
- case 16:
- #line 63 "expr.y"
- { yyval = yyvsp[-2] + yyvsp[0]; ;
- break;}
- case 17:
- #line 64 "expr.y"
- { yyval = yyvsp[-2] - yyvsp[0]; ;
- break;}
- case 18:
- #line 65 "expr.y"
- { yyval = yyvsp[-2] * yyvsp[0]; ;
- break;}
- case 19:
- #line 67 "expr.y"
- { if (yyvsp[0]) yyval = yyvsp[-2] / yyvsp[0]; else yyerror ("Division by zero"); ;
- break;}
- case 20:
- #line 69 "expr.y"
- { if (yyvsp[0]) yyval = yyvsp[-2] % yyvsp[0]; else yyerror ("Division by zero"); ;
- break;}
- case 21:
- #line 70 "expr.y"
- { yyval = -yyvsp[0]; ;
- break;}
- case 22:
- #line 71 "expr.y"
- { yyval = !yyvsp[0]; ;
- break;}
- case 23:
- #line 72 "expr.y"
- { yyval = ~yyvsp[0]; ;
- break;}
- case 24:
- #line 73 "expr.y"
- { yyval = yyvsp[-1]; ;
- break;}
- case 25:
- #line 75 "expr.y"
- { if (valid_addr (yyvsp[-1], 4))
- { long l; read_child (yyvsp[-1], &l, 4); yyval = l; }
- else
- yyerror ("Error reading child");
- ;
- break;}
- case 26:
- #line 81 "expr.y"
- { switch (yyvsp[0]) {
- case 1: yyval = (yyvsp[-2] & 0xff); break;
- case 2: yyval = (yyvsp[-2] & 0xffff); break;
- case 4: yyval = (yyvsp[-2] & 0xffffffff); break;
- default: yyerror ("Invalid resizing");
- };
- break;}
- }
- /* the action file gets copied in in place of this dollarsign */
- #line 465 "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;
- /* Start X at -yyn if nec to avoid negative indexes in yycheck. */
- for (x = (yyn < 0 ? -yyn : 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 = (yyn < 0 ? -yyn : 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");
- }
-
- goto yyerrlab1;
- 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 89 "expr.y"
-
-
- static int
- yylex ()
- {
- char *p, save;
- int i;
- static struct {
- char c1, c2;
- int token;
- } twochars[] = {
- { '=', '=', OP_EQ },
- { '>', '=', OP_GE },
- { '<', '=', OP_LE },
- { '!', '=', OP_NE },
- { '&', '&', OP_LAND},
- { '|', '|', OP_LOR },
- { '<', '<', OP_SHL},
- { '>', '>', OP_SHR}};
-
- while (isspace (*input)) input++;
- switch (*input)
- {
- case '0' ... '9':
- case 'a' ... 'z':
- case 'A' ... 'Z':
- case '%':
- case '_':
- case '#':
- case '.':
- p = input++;
- while (isalnum (*input)
- || *input == '_' || *input == '#' || *input == '.')
- input++;
- save = *input;
- *input = 0;
- yylval = (long) syms_name2val (p);
- if (undefined_symbol)
- {
- static char buf[80];
- sprintf (buf, "Undefined symbol `%s'", p);
- yyerror (buf);
- }
- *input = save;
- return NUM;
- case '\'':
- if (input[1] == '\\' && input[2] && input[3] == '\'')
- {
- static char escaped[] = "e\et\tb\bn\nr\r\\\\''";
- for (i = 0; escaped[i]; i += 2)
- if (input[2] == escaped[i])
- {
- input += 4;
- yylval = escaped[i + 1];
- return NUM;
- }
- yyerror ("Unrecognized escaped character");
- }
- else if (input[1] && input[2] == '\'')
- {
- yylval = input[1];
- input += 3;
- }
- else
- yyerror ("Unterminated character constant");
- return NUM;
- case 0:
- return 0;
- default:
- for (i = 0; i < sizeof (twochars) / sizeof (twochars[0]); i++)
- if (*input == twochars[i].c1 && input[1] == twochars[i].c2)
- {
- input += 2;
- return twochars[i].token;
- }
- return *input++;
- }
- }
-
- int
- evaluate (char *exp, long *res, char **errtxt)
- {
- int err;
-
- input = exp;
- error = 0;
- err = yyparse ();
- *res = result;
- *errtxt = error;
- undefined_symbol = 0;
- return err || error;
- }
-
- static void
- yyerror (char *s)
- {
- if (!error) error = s;
- }
-
-
- #ifdef TEST
-
- unsigned long
- syms_name2val (char *p)
- {
- return strtoul(p, 0, 0);
- }
-
- int
- main (int argc, char **argv)
- {
- long res;
- int i, err;
- char *errtxt;
-
- for (i = 1; i < argc; i++)
- {
- err = evaluate (argv[i], &res, &errtxt);
- if (err)
- printf ("`%s' -> %s\n", argv[i], errtxt);
- else
- printf ("`%s' -> %ld\n", argv[i], res);
- }
- return 0;
- }
- #endif
-