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-
- /* A Bison parser, made from cexp.y */
-
- #define INT 258
- #define CHAR 259
- #define NAME 260
- #define ERROR 261
- #define OR 262
- #define AND 263
- #define EQUAL 264
- #define NOTEQUAL 265
- #define LEQ 266
- #define GEQ 267
- #define LSH 268
- #define RSH 269
- #define UNARY 270
-
- #line 109 "cexp.y"
-
- #include "config.h"
- #include <setjmp.h>
- #include "alloca.h"
- /* #define YYDEBUG 1 */
-
- int yylex ();
- void yyerror ();
- int expression_value;
-
- static jmp_buf parse_return_error;
-
- /* some external tables of character types */
- extern unsigned char is_idstart[], is_idchar[];
-
-
- #line 125 "cexp.y"
- typedef union {
- long lval;
- int voidval;
- char *sval;
- } 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
-
- #define YYACCEPT return(0)
- #define YYABORT return(1)
- #define YYERROR return(1)
- #include <stdio.h>
-
- #ifndef __STDC__
- #define const
- #endif
-
-
-
- #define YYFINAL 59
- #define YYFLAG -32768
- #define YYNTBASE 33
-
- #define YYTRANSLATE(x) ((unsigned)(x) <= 270 ? yytranslate[x] : 36)
-
- 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, 29, 2, 2, 2, 27, 14, 2, 31,
- 32, 25, 23, 9, 24, 2, 26, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 8, 2, 17,
- 2, 18, 7, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 13, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 12, 2, 30, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 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, 10, 11, 15, 16, 19, 20, 21, 22, 28
- };
-
- static const short yyrline[] = { 0,
- 154, 159, 160, 165, 167, 169, 171, 176, 178, 180,
- 182, 184, 186, 188, 190, 192, 194, 196, 198, 200,
- 202, 204, 206, 208, 210, 212, 214, 216, 218
- };
-
- static const char * const yytname[] = { 0,
- "error","$illegal.","INT","CHAR","NAME","ERROR","'?'","':'","','","OR",
- "AND","'|'","'^'","'&'","EQUAL","NOTEQUAL","'<'","'>'","LEQ","GEQ",
- "LSH","RSH","'+'","'-'","'*'","'/'","'%'","UNARY","'!'","'~'",
- "'('","')'","start"
- };
-
- static const short yyr1[] = { 0,
- 33, 34, 34, 35, 35, 35, 35, 35, 35, 35,
- 35, 35, 35, 35, 35, 35, 35, 35, 35, 35,
- 35, 35, 35, 35, 35, 35, 35, 35, 35
- };
-
- static const short yyr2[] = { 0,
- 1, 1, 3, 2, 2, 2, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 5, 1, 1, 1
- };
-
- static const short yydefact[] = { 0,
- 27, 28, 29, 0, 0, 0, 0, 1, 2, 4,
- 5, 6, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 7, 3, 0, 25, 24, 23, 22,
- 21, 15, 16, 19, 20, 17, 18, 13, 14, 11,
- 12, 8, 9, 10, 0, 26, 0, 0, 0
- };
-
- static const short yydefgoto[] = { 57,
- 8, 9
- };
-
- static const short yypact[] = { 28,
- -32768,-32768,-32768, 28, 28, 28, 28, -3, 74,-32768,
- -32768,-32768, -2, 28, 28, 28, 28, 28, 28, 28,
- 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
- 28, 28, 28,-32768, 74, 53, 23, 90, 105, 119,
- 132, 143, 143, 150, 150, 150, 150, 155, 155, -22,
- -22,-32768,-32768,-32768, 28, 74, 8, 9,-32768
- };
-
- static const short yypgoto[] = {-32768,
- 46, -4
- };
-
-
- #define YYLAST 182
-
-
- static const short yytable[] = { 10,
- 11, 12, 31, 32, 33, 14, 14, 58, 59, 35,
- 36, 37, 38, 39, 40, 41, 42, 43, 44, 45,
- 46, 47, 48, 49, 50, 51, 52, 53, 54, 34,
- 1, 2, 3, 17, 18, 19, 20, 21, 22, 23,
- 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
- 56, 4, 13, 0, 0, 0, 5, 6, 7, 15,
- 55, 0, 16, 17, 18, 19, 20, 21, 22, 23,
- 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
- 15, 0, 0, 16, 17, 18, 19, 20, 21, 22,
- 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
- 33, 18, 19, 20, 21, 22, 23, 24, 25, 26,
- 27, 28, 29, 30, 31, 32, 33, 19, 20, 21,
- 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
- 32, 33, 20, 21, 22, 23, 24, 25, 26, 27,
- 28, 29, 30, 31, 32, 33, 21, 22, 23, 24,
- 25, 26, 27, 28, 29, 30, 31, 32, 33, 23,
- 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
- 27, 28, 29, 30, 31, 32, 33, 29, 30, 31,
- 32, 33
- };
-
- static const short yycheck[] = { 4,
- 5, 6, 25, 26, 27, 9, 9, 0, 0, 14,
- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
- 25, 26, 27, 28, 29, 30, 31, 32, 33, 32,
- 3, 4, 5, 11, 12, 13, 14, 15, 16, 17,
- 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
- 55, 24, 7, -1, -1, -1, 29, 30, 31, 7,
- 8, -1, 10, 11, 12, 13, 14, 15, 16, 17,
- 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
- 7, -1, -1, 10, 11, 12, 13, 14, 15, 16,
- 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
- 27, 12, 13, 14, 15, 16, 17, 18, 19, 20,
- 21, 22, 23, 24, 25, 26, 27, 13, 14, 15,
- 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
- 26, 27, 14, 15, 16, 17, 18, 19, 20, 21,
- 22, 23, 24, 25, 26, 27, 15, 16, 17, 18,
- 19, 20, 21, 22, 23, 24, 25, 26, 27, 17,
- 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
- 21, 22, 23, 24, 25, 26, 27, 23, 24, 25,
- 26, 27
- };
- #define YYPURE 1
-
- #line 2 "bison.simple"
-
- /* Skeleton output parser for bison,
- copyright (C) 1984 Bob Corbett and Richard Stallman
-
- NO WARRANTY
-
- BECAUSE THIS PROGRAM IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY
- NO WARRANTY, TO THE EXTENT PERMITTED BY APPLICABLE STATE LAW. EXCEPT
- WHEN OTHERWISE STATED IN WRITING, FREE SOFTWARE FOUNDATION, INC,
- RICHARD M. STALLMAN AND/OR OTHER PARTIES PROVIDE THIS PROGRAM "AS IS"
- WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
- BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY
- AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
- DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
- CORRECTION.
-
- IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL RICHARD M.
- STALLMAN, THE FREE SOFTWARE FOUNDATION, INC., AND/OR ANY OTHER PARTY
- WHO MAY MODIFY AND REDISTRIBUTE THIS PROGRAM AS PERMITTED BELOW, BE
- LIABLE TO YOU FOR DAMAGES, INCLUDING ANY LOST PROFITS, LOST MONIES, OR
- OTHER SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
- USE OR INABILITY TO USE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR
- DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY THIRD PARTIES OR
- A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS) THIS
- PROGRAM, EVEN IF YOU HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
- DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY.
-
- GENERAL PUBLIC LICENSE TO COPY
-
- 1. You may copy and distribute verbatim copies of this source file
- as you receive it, in any medium, provided that you conspicuously and
- appropriately publish on each copy a valid copyright notice "Copyright
- (C) 1985 Free Software Foundation, Inc."; and include following the
- copyright notice a verbatim copy of the above disclaimer of warranty
- and of this License. You may charge a distribution fee for the
- physical act of transferring a copy.
-
- 2. You may modify your copy or copies of this source file or
- any portion of it, and copy and distribute such modifications under
- the terms of Paragraph 1 above, provided that you also do the following:
-
- a) cause the modified files to carry prominent notices stating
- that you changed the files and the date of any change; and
-
- b) cause the whole of any work that you distribute or publish,
- that in whole or in part contains or is a derivative of this
- program or any part thereof, to be licensed at no charge to all
- third parties on terms identical to those contained in this
- License Agreement (except that you may choose to grant more extensive
- warranty protection to some or all third parties, at your option).
-
- c) You may charge a distribution fee for the physical act of
- transferring a copy, and you may at your option offer warranty
- protection in exchange for a fee.
-
- Mere aggregation of another unrelated program with this program (or its
- derivative) on a volume of a storage or distribution medium does not bring
- the other program under the scope of these terms.
-
- 3. You may copy and distribute this program (or a portion or derivative
- of it, under Paragraph 2) in object code or executable form under the terms
- of Paragraphs 1 and 2 above provided that you also do one of the following:
-
- a) accompany it with the complete corresponding machine-readable
- source code, which must be distributed under the terms of
- Paragraphs 1 and 2 above; or,
-
- b) accompany it with a written offer, valid for at least three
- years, to give any third party free (except for a nominal
- shipping charge) a complete machine-readable copy of the
- corresponding source code, to be distributed under the terms of
- Paragraphs 1 and 2 above; or,
-
- c) accompany it with the information you received as to where the
- corresponding source code may be obtained. (This alternative is
- allowed only for noncommercial distribution and only if you
- received the program in object code or executable form alone.)
-
- For an executable file, complete source code means all the source code for
- all modules it contains; but, as a special exception, it need not include
- source code for modules which are standard libraries that accompany the
- operating system on which the executable file runs.
-
- 4. You may not copy, sublicense, distribute or transfer this program
- except as expressly provided under this License Agreement. Any attempt
- otherwise to copy, sublicense, distribute or transfer this program is void and
- your rights to use the program under this License agreement shall be
- automatically terminated. However, parties who have received computer
- software programs from you with this License Agreement will not have
- their licenses terminated so long as such parties remain in full compliance.
-
- 5. If you wish to incorporate parts of this program into other free
- programs whose distribution conditions are different, write to the Free
- Software Foundation at 675 Mass Ave, Cambridge, MA 02139. We have not yet
- worked out a simple rule that can be stated here, but we will often permit
- this. We will be guided by the two goals of preserving the free status of
- all derivatives of our free software and of promoting the sharing and reuse of
- software.
-
-
- In other words, you are welcome to use, share and improve this program.
- You are forbidden to forbid anyone else to use, share and improve
- what you give them. Help stamp out software-hoarding! */
-
- /* 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 YYFAIL goto yyerrlab;
-
- #define YYTERROR 1
-
- #ifndef YYIMPURE
- #define YYLEX yylex()
- #endif
-
- #ifndef YYPURE
- #define YYLEX yylex(&yylval, &yylloc)
- #endif
-
- /* If nonreentrant, generate the variables here */
-
- #ifndef YYIMPURE
-
- int yychar; /* the lookahead symbol */
- YYSTYPE yylval; /* the semantic value of the */
- /* lookahead symbol */
-
- YYLTYPE yylloc; /* location data for the lookahead */
- /* symbol */
-
- #ifdef YYDEBUG
- int yydebug = 0; /* nonzero means print parse trace */
- #endif
-
- #endif /* YYIMPURE */
-
-
- /* YYMAXDEPTH indicates the initial size of the parser's stacks */
-
- #ifndef YYMAXDEPTH
- #define YYMAXDEPTH 200
- #endif
-
- /* YYMAXLIMIT is the maximum size the stacks can grow to
- (effective only if the built-in stack extension method is used). */
-
- #ifndef YYMAXLIMIT
- #define YYMAXLIMIT 10000
- #endif
-
-
- #line 87 "bison.simple"
- int
- yyparse()
- {
- register int yystate;
- register int yyn;
- register short *yyssp;
- register YYSTYPE *yyvsp;
- YYLTYPE *yylsp;
- int yyerrstatus; /* number of tokens to shift before error messages enabled */
- int yychar1; /* lookahead token as an internal (translated) token number */
-
- short yyssa[YYMAXDEPTH]; /* the state stack */
- YYSTYPE yyvsa[YYMAXDEPTH]; /* the semantic value stack */
- YYLTYPE yylsa[YYMAXDEPTH]; /* the location stack */
-
- short *yyss = yyssa; /* refer to the stacks thru separate pointers */
- YYSTYPE *yyvs = yyvsa; /* to allow yyoverflow to reallocate them elsewhere */
- YYLTYPE *yyls = yylsa;
-
- int yymaxdepth = YYMAXDEPTH;
-
- #ifndef YYPURE
-
- int yychar;
- YYSTYPE yylval;
- YYLTYPE yylloc;
-
- #ifdef YYDEBUG
- extern int yydebug;
- #endif
-
- #endif
-
-
- YYSTYPE yyval; /* the variable used to return */
- /* semantic values from the action */
- /* routines */
-
- int yylen;
-
- #ifdef YYDEBUG
- if (yydebug)
- fprintf(stderr, "Starting parse\n");
- #endif
-
- yystate = 0;
- yyerrstatus = 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;
- yylsp = yyls;
-
- /* 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 + yymaxdepth - 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;
- YYLTYPE *yyls1 = yyls;
- short *yyss1 = yyss;
-
- /* 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),
- &yyls1, size * sizeof (*yylsp),
- &yymaxdepth);
-
- yyss = yyss1; yyvs = yyvs1; yyls = yyls1;
- #else /* no yyoverflow */
- /* Extend the stack our own way. */
- if (yymaxdepth >= YYMAXLIMIT)
- yyerror("parser stack overflow");
- yymaxdepth *= 2;
- if (yymaxdepth > YYMAXLIMIT)
- yymaxdepth = YYMAXLIMIT;
- yyss = (short *) alloca (yymaxdepth * sizeof (*yyssp));
- bcopy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
- yyls = (YYLTYPE *) alloca (yymaxdepth * sizeof (*yylsp));
- bcopy ((char *)yyls1, (char *)yyls, size * sizeof (*yylsp));
- yyvs = (YYSTYPE *) alloca (yymaxdepth * sizeof (*yyvsp));
- bcopy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
- #endif /* no yyoverflow */
-
- yyssp = yyss + size - 1;
- yylsp = yyls + size - 1;
- yyvsp = yyvs + size - 1;
-
- #ifdef YYDEBUG
- if (yydebug)
- fprintf(stderr, "Stack size increased to %d\n", yymaxdepth);
- #endif
-
- if (yyssp >= yyss + yymaxdepth - 1)
- YYERROR;
- }
-
- #ifdef YYDEBUG
- if (yydebug)
- fprintf(stderr, "Entering state %d\n", yystate);
- #endif
-
- /* 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)
- {
- #ifdef YYDEBUG
- 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 */
-
- #ifdef YYDEBUG
- if (yydebug)
- fprintf(stderr, "Now at end of input.\n");
- #endif
- }
- else
- {
- yychar1 = YYTRANSLATE(yychar);
-
- #ifdef YYDEBUG
- if (yydebug)
- fprintf(stderr, "Next token is %d (%s)\n", yychar, yytname[yychar1]);
- #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. */
-
- #ifdef YYDEBUG
- 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;
- *++yylsp = yylloc;
-
- /* 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 */
-
- #ifdef YYDEBUG
- if (yydebug)
- {
- if (yylen == 1)
- fprintf (stderr, "Reducing 1 value via line %d, ",
- yyrline[yyn]);
- else
- fprintf (stderr, "Reducing %d values via line %d, ",
- yylen, yyrline[yyn]);
- }
- #endif
-
-
- switch (yyn) {
-
- case 1:
- #line 155 "cexp.y"
- { expression_value = yyvsp[0].lval; ;
- break;}
- case 3:
- #line 161 "cexp.y"
- { yyval.lval = yyvsp[0].lval; ;
- break;}
- case 4:
- #line 166 "cexp.y"
- { yyval.lval = - yyvsp[0].lval; ;
- break;}
- case 5:
- #line 168 "cexp.y"
- { yyval.lval = ! yyvsp[0].lval; ;
- break;}
- case 6:
- #line 170 "cexp.y"
- { yyval.lval = ~ yyvsp[0].lval; ;
- break;}
- case 7:
- #line 172 "cexp.y"
- { yyval.lval = yyvsp[-1].lval; ;
- break;}
- case 8:
- #line 177 "cexp.y"
- { yyval.lval = yyvsp[-2].lval * yyvsp[0].lval; ;
- break;}
- case 9:
- #line 179 "cexp.y"
- { yyval.lval = yyvsp[-2].lval / yyvsp[0].lval; ;
- break;}
- case 10:
- #line 181 "cexp.y"
- { yyval.lval = yyvsp[-2].lval % yyvsp[0].lval; ;
- break;}
- case 11:
- #line 183 "cexp.y"
- { yyval.lval = yyvsp[-2].lval + yyvsp[0].lval; ;
- break;}
- case 12:
- #line 185 "cexp.y"
- { yyval.lval = yyvsp[-2].lval - yyvsp[0].lval; ;
- break;}
- case 13:
- #line 187 "cexp.y"
- { yyval.lval = yyvsp[-2].lval << yyvsp[0].lval; ;
- break;}
- case 14:
- #line 189 "cexp.y"
- { yyval.lval = yyvsp[-2].lval >> yyvsp[0].lval; ;
- break;}
- case 15:
- #line 191 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval == yyvsp[0].lval); ;
- break;}
- case 16:
- #line 193 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval != yyvsp[0].lval); ;
- break;}
- case 17:
- #line 195 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval <= yyvsp[0].lval); ;
- break;}
- case 18:
- #line 197 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval >= yyvsp[0].lval); ;
- break;}
- case 19:
- #line 199 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval < yyvsp[0].lval); ;
- break;}
- case 20:
- #line 201 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval > yyvsp[0].lval); ;
- break;}
- case 21:
- #line 203 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval & yyvsp[0].lval); ;
- break;}
- case 22:
- #line 205 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval ^ yyvsp[0].lval); ;
- break;}
- case 23:
- #line 207 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval | yyvsp[0].lval); ;
- break;}
- case 24:
- #line 209 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval && yyvsp[0].lval); ;
- break;}
- case 25:
- #line 211 "cexp.y"
- { yyval.lval = (yyvsp[-2].lval || yyvsp[0].lval); ;
- break;}
- case 26:
- #line 213 "cexp.y"
- { yyval.lval = yyvsp[-4].lval ? yyvsp[-2].lval : yyvsp[0].lval; ;
- break;}
- case 27:
- #line 215 "cexp.y"
- { yyval.lval = yylval.lval; ;
- break;}
- case 28:
- #line 217 "cexp.y"
- { yyval.lval = yylval.lval; ;
- break;}
- case 29:
- #line 219 "cexp.y"
- { yyval.lval = 0; ;
- break;}
- }
- /* the action file gets copied in in place of this dollarsign */
- #line 303 "bison.simple"
-
- yyvsp -= yylen;
- yylsp -= yylen;
- yyssp -= yylen;
-
- #ifdef YYDEBUG
- if (yydebug)
- {
- short *ssp1 = yyss - 1;
- fprintf (stderr, "state stack now", yyssp-yyss);
- while (ssp1 != yyssp)
- fprintf (stderr, " %d", *++ssp1);
- fprintf (stderr, "\n");
- }
- #endif
-
- *++yyvsp = yyval;
-
- 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;
- }
-
- /* 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. */
- {
- yyerror("parse error");
- }
-
- 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)
- YYERROR;
-
- #ifdef YYDEBUG
- 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) YYERROR;
- yyvsp--;
- yylsp--;
- yystate = *--yyssp;
-
- #ifdef YYDEBUG
- if (yydebug)
- {
- short *ssp1 = yyss - 1;
- fprintf (stderr, "Error: state stack now", yyssp-yyss);
- 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;
-
- #ifdef YYDEBUG
- if (yydebug)
- fprintf(stderr, "Shifting error token, ");
- #endif
-
- *++yyvsp = yylval;
- *++yylsp = yylloc;
-
- yystate = yyn;
- goto yynewstate;
- }
- #line 221 "cexp.y"
-
-
- /* During parsing of a C expression, the pointer to the next character
- is in this variable. */
-
- static char *lexptr;
-
- /* Take care of parsing a number (anything that starts with a digit).
- Set yylval and return the token type; update lexptr.
- LEN is the number of characters in it. */
-
- /* maybe needs to actually deal with floating point numbers */
-
- int
- parse_number (olen)
- int olen;
- {
- register char *p = lexptr;
- register long n = 0;
- register int c;
- register int base = 10;
- register len = olen;
- char *err_copy;
-
- extern double atof ();
-
- for (c = 0; c < len; c++)
- if (p[c] == '.') {
- /* It's a float since it contains a point. */
- yyerror ("floating point numbers not allowed in #if expressions");
- return ERROR;
-
- /* ****************
- yylval.dval = atof (p);
- lexptr += len;
- return FLOAT;
- **************** */
- }
-
- if (len >= 3 && (!strncmp (p, "0x", 2) || !strncmp (p, "0X", 2))) {
- p += 2;
- base = 16;
- len -= 2;
- }
- else if (*p == '0')
- base = 8;
-
- while (len-- > 0) {
- c = *p++;
- n *= base;
- if (c >= '0' && c <= '9')
- n += c - '0';
- else {
- if (c >= 'A' && c <= 'Z') c += 'a' - 'A';
- if (base == 16 && c >= 'a' && c <= 'f')
- n += c - 'a' + 10;
- else if (len == 0 && c == 'l')
- ;
- else {
- yyerror ("Invalid number in #if expression");
- return ERROR;
- }
- }
- }
-
- lexptr = p;
- yylval.lval = n;
- return INT;
- }
-
- struct token {
- char *operator;
- int token;
- };
-
- #define NULL 0
-
- static struct token tokentab2[] = {
- {"&&", AND},
- {"||", OR},
- {"<<", LSH},
- {">>", RSH},
- {"==", EQUAL},
- {"!=", NOTEQUAL},
- {"<=", LEQ},
- {">=", GEQ},
- {NULL, ERROR}
- };
-
- /* Read one token, getting characters through lexptr. */
-
- int
- yylex ()
- {
- register int c;
- register int namelen;
- register char *tokstart;
- register struct token *toktab;
-
- retry:
-
- tokstart = lexptr;
- c = *tokstart;
- /* See if it is a special token of length 2. */
- for (toktab = tokentab2; toktab->operator != NULL; toktab++)
- if (c == *toktab->operator && tokstart[1] == toktab->operator[1]) {
- lexptr += 2;
- return toktab->token;
- }
-
- switch (c) {
- case 0:
- return 0;
-
- case ' ':
- case '\t':
- case '\n':
- lexptr++;
- goto retry;
-
- case '\'':
- lexptr++;
- c = *lexptr++;
- if (c == '\\')
- c = parse_escape (&lexptr);
- yylval.lval = c;
- c = *lexptr++;
- if (c != '\'') {
- yyerror ("Invalid character constant in #if");
- return ERROR;
- }
-
- return CHAR;
-
- /* some of these chars are invalid in constant expressions;
- maybe do something about them later */
- case '/':
- case '+':
- case '-':
- case '*':
- case '%':
- case '|':
- case '&':
- case '^':
- case '~':
- case '!':
- case '@':
- case '<':
- case '>':
- case '(':
- case ')':
- case '[':
- case ']':
- case '.':
- case '?':
- case ':':
- case '=':
- case '{':
- case '}':
- case ',':
- lexptr++;
- return c;
-
- case '"':
- yyerror ("double quoted strings not allowed in #if expressions");
- return ERROR;
- }
- if (c >= '0' && c <= '9') {
- /* It's a number */
- for (namelen = 0;
- c = tokstart[namelen], is_idchar[c] || c == '.';
- namelen++)
- ;
- return parse_number (namelen);
- }
-
- if (!is_idstart[c]) {
- yyerror ("Invalid token in expression");
- return ERROR;
- }
-
- /* It is a name. See how long it is. */
-
- for (namelen = 0; is_idchar[tokstart[namelen]]; namelen++)
- ;
-
- lexptr += namelen;
- return NAME;
- }
-
-
- /* Parse a C escape sequence. STRING_PTR points to a variable
- containing a pointer to the string to parse. That pointer
- is updated past the characters we use. The value of the
- escape sequence is returned.
-
- A negative value means the sequence \ newline was seen,
- which is supposed to be equivalent to nothing at all.
-
- If \ is followed by a null character, we return a negative
- value and leave the string pointer pointing at the null character.
-
- If \ is followed by 000, we return 0 and leave the string pointer
- after the zeros. A value of 0 does not mean end of string. */
-
- int
- parse_escape (string_ptr)
- char **string_ptr;
- {
- register int c = *(*string_ptr)++;
- switch (c)
- {
- case 'a':
- return '\a';
- case 'b':
- return '\b';
- case 'e':
- return 033;
- case 'f':
- return '\f';
- case 'n':
- return '\n';
- case 'r':
- return '\r';
- case 't':
- return '\t';
- case 'v':
- return '\v';
- case '\n':
- return -2;
- case 0:
- (*string_ptr)--;
- return 0;
- case '^':
- c = *(*string_ptr)++;
- if (c == '\\')
- c = parse_escape (string_ptr);
- if (c == '?')
- return 0177;
- return (c & 0200) | (c & 037);
-
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- {
- register int i = c - '0';
- register int count = 0;
- while (++count < 3)
- {
- if ((c = *(*string_ptr)++) >= '0' && c <= '7')
- {
- i *= 8;
- i += c - '0';
- }
- else
- {
- (*string_ptr)--;
- break;
- }
- }
- return i;
- }
- default:
- return c;
- }
- }
-
- void
- yyerror (s)
- char *s;
- {
- error (s);
- longjmp (parse_return_error, 1);
- }
-
- /* This page contains the entry point to this file. */
-
- /* Parse STRING as an expression, and complain if this fails
- to use up all of the contents of STRING. */
- /* We do not support C comments. They should be removed before
- this function is called. */
-
- int
- parse_c_expression (string)
- char *string;
- {
- lexptr = string;
-
- if (lexptr == 0 || *lexptr == 0) {
- error ("empty #if expression");
- return 0; /* don't include the #if group */
- }
-
- /* if there is some sort of scanning error, just return 0 and assume
- the parsing routine has printed an error message somewhere.
- there is surely a better thing to do than this. */
- if (setjmp(parse_return_error))
- return 0;
-
- if (yyparse ())
- return 0; /* actually this is never reached
- the way things stand. */
- if (*lexptr)
- error ("Junk after end of expression.");
-
- return expression_value; /* set by yyparse() */
- }
-
- #ifdef TEST_EXP_READER
- /* main program, for testing purposes. */
- main()
- {
- int n;
- char buf[1024];
- extern int yydebug;
- /*
- yydebug = 1;
- */
- initialize_random_junk ();
-
- for (;;) {
- printf("enter expression: ");
- n = 0;
- while ((buf[n] = getchar()) != '\n')
- n++;
- buf[n] = '\0';
- printf("parser returned %d\n", parse_c_expression(buf));
- }
- }
-
- /* table to tell if char can be part of a C identifier. */
- char is_idchar[256];
- /* table to tell if char can be first char of a c identifier. */
- char is_idstart[256];
- /* table to tell if c is horizontal space. isspace() thinks that
- newline is space; this is not a good idea for this program. */
- char is_hor_space[256];
-
- /*
- * initialize random junk in the hash table and maybe other places
- */
- initialize_random_junk()
- {
- register int i;
-
- /*
- * Set up is_idchar and is_idstart tables. These should be
- * faster than saying (is_alpha(c) || c == '_'), etc.
- * Must do set up these things before calling any routines tthat
- * refer to them.
- */
- for (i = 'a'; i <= 'z'; i++) {
- ++is_idchar[i - 'a' + 'A'];
- ++is_idchar[i];
- ++is_idstart[i - 'a' + 'A'];
- ++is_idstart[i];
- }
- for (i = '0'; i <= '9'; i++)
- ++is_idchar[i];
- ++is_idchar['_'];
- ++is_idstart['_'];
- #ifdef DOLLARS_IN_IDENTIFIERS
- ++is_idchar['$'];
- ++is_idstart['$'];
- #endif
-
- /* horizontal space table */
- ++is_hor_space[' '];
- ++is_hor_space['\t'];
- }
-
- error (msg)
- {
- printf("error: %s\n", msg);
- }
- #endif
-