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-
- /* A Bison parser, made from cexp.y with Bison version GNU Bison version 1.22
- */
-
- #define YYBISON 1 /* Identify Bison output. */
-
- #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 26 "cexp.y"
-
- #include "config.h"
- #include <setjmp.h>
- /* #define YYDEBUG 1 */
-
- #ifdef MULTIBYTE_CHARS
- #include <stdlib.h>
- #include <locale.h>
- #endif
-
- #include <stdio.h>
-
- typedef unsigned char U_CHAR;
-
- /* This is used for communicating lists of keywords with cccp.c. */
- struct arglist {
- struct arglist *next;
- U_CHAR *name;
- int length;
- int argno;
- };
-
- /* Define a generic NULL if one hasn't already been defined. */
-
- #ifndef NULL
- #define NULL 0
- #endif
-
- #ifndef GENERIC_PTR
- #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
- #define GENERIC_PTR void *
- #else
- #define GENERIC_PTR char *
- #endif
- #endif
-
- #ifndef NULL_PTR
- #define NULL_PTR ((GENERIC_PTR)0)
- #endif
-
- int yylex ();
- void yyerror ();
- int expression_value;
-
- static jmp_buf parse_return_error;
-
- /* Nonzero means count most punctuation as part of a name. */
- static int keyword_parsing = 0;
-
- /* some external tables of character types */
- extern unsigned char is_idstart[], is_idchar[], is_hor_space[];
-
- extern char *xmalloc ();
-
- /* Flag for -pedantic. */
- extern int pedantic;
-
- /* Flag for -traditional. */
- extern int traditional;
-
- #ifndef CHAR_TYPE_SIZE
- #define CHAR_TYPE_SIZE BITS_PER_UNIT
- #endif
-
- #ifndef INT_TYPE_SIZE
- #define INT_TYPE_SIZE BITS_PER_WORD
- #endif
-
- #ifndef LONG_TYPE_SIZE
- #define LONG_TYPE_SIZE BITS_PER_WORD
- #endif
-
- #ifndef WCHAR_TYPE_SIZE
- #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
- #endif
-
- #ifndef MAX_CHAR_TYPE_SIZE
- #define MAX_CHAR_TYPE_SIZE CHAR_TYPE_SIZE
- #endif
-
- #ifndef MAX_INT_TYPE_SIZE
- #define MAX_INT_TYPE_SIZE INT_TYPE_SIZE
- #endif
-
- #ifndef MAX_LONG_TYPE_SIZE
- #define MAX_LONG_TYPE_SIZE LONG_TYPE_SIZE
- #endif
-
- #ifndef MAX_WCHAR_TYPE_SIZE
- #define MAX_WCHAR_TYPE_SIZE WCHAR_TYPE_SIZE
- #endif
-
- /* Yield nonzero if adding two numbers with A's and B's signs can yield a
- number with SUM's sign, where A, B, and SUM are all C integers. */
- #define possible_sum_sign(a, b, sum) ((((a) ^ (b)) | ~ ((a) ^ (sum))) < 0)
-
- static void integer_overflow ();
- static long left_shift ();
- static long right_shift ();
-
- #line 127 "cexp.y"
- typedef union {
- struct constant {long value; int unsignedp;} integer;
- struct name {U_CHAR *address; int length;} name;
- struct arglist *keywords;
- 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
-
- #include <stdio.h>
-
- #ifndef __cplusplus
- #ifndef __STDC__
- #define const
- #endif
- #endif
-
-
-
- #define YYFINAL 73
- #define YYFLAG -32768
- #define YYNTBASE 34
-
- #define YYTRANSLATE(x) ((unsigned)(x) <= 270 ? yytranslate[x] : 39)
-
- 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, 31, 2, 27, 14, 2, 32,
- 33, 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
- };
-
- #if YYDEBUG != 0
- static const short yyprhs[] = { 0,
- 0, 2, 4, 8, 11, 14, 17, 20, 23, 24,
- 31, 35, 39, 43, 47, 51, 55, 59, 63, 67,
- 71, 75, 79, 83, 87, 91, 95, 99, 103, 107,
- 113, 115, 117, 119, 120, 125
- };
-
- static const short yyrhs[] = { 35,
- 0, 36, 0, 35, 9, 36, 0, 24, 36, 0,
- 29, 36, 0, 23, 36, 0, 30, 36, 0, 31,
- 5, 0, 0, 31, 5, 37, 32, 38, 33, 0,
- 32, 35, 33, 0, 36, 25, 36, 0, 36, 26,
- 36, 0, 36, 27, 36, 0, 36, 23, 36, 0,
- 36, 24, 36, 0, 36, 21, 36, 0, 36, 22,
- 36, 0, 36, 15, 36, 0, 36, 16, 36, 0,
- 36, 19, 36, 0, 36, 20, 36, 0, 36, 17,
- 36, 0, 36, 18, 36, 0, 36, 14, 36, 0,
- 36, 13, 36, 0, 36, 12, 36, 0, 36, 11,
- 36, 0, 36, 10, 36, 0, 36, 7, 36, 8,
- 36, 0, 3, 0, 4, 0, 5, 0, 0, 32,
- 38, 33, 38, 0, 5, 38, 0
- };
-
- #endif
-
- #if YYDEBUG != 0
- static const short yyrline[] = { 0,
- 159, 164, 165, 172, 177, 180, 182, 185, 189, 191,
- 196, 201, 213, 228, 239, 246, 253, 259, 265, 268,
- 271, 277, 283, 289, 295, 298, 301, 304, 307, 310,
- 313, 315, 317, 322, 324, 337
- };
-
- static const char * const yytname[] = { "$","error","$illegal.","INT","CHAR",
- "NAME","ERROR","'?'","':'","','","OR","AND","'|'","'^'","'&'","EQUAL","NOTEQUAL",
- "'<'","'>'","LEQ","GEQ","LSH","RSH","'+'","'-'","'*'","'/'","'%'","UNARY","'!'",
- "'~'","'#'","'('","')'","start","exp1","exp","@1","keywords",""
- };
- #endif
-
- static const short yyr1[] = { 0,
- 34, 35, 35, 36, 36, 36, 36, 36, 37, 36,
- 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
- 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
- 36, 36, 36, 38, 38, 38
- };
-
- static const short yyr2[] = { 0,
- 1, 1, 3, 2, 2, 2, 2, 2, 0, 6,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 5,
- 1, 1, 1, 0, 4, 2
- };
-
- static const short yydefact[] = { 0,
- 31, 32, 33, 0, 0, 0, 0, 0, 0, 1,
- 2, 6, 4, 5, 7, 8, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 11, 3,
- 0, 29, 28, 27, 26, 25, 19, 20, 23, 24,
- 21, 22, 17, 18, 15, 16, 12, 13, 14, 34,
- 0, 34, 34, 0, 30, 36, 0, 10, 34, 35,
- 0, 0, 0
- };
-
- static const short yydefgoto[] = { 71,
- 10, 11, 38, 64
- };
-
- static const short yypact[] = { 31,
- -32768,-32768,-32768, 31, 31, 31, 31, 4, 31, 3,
- 80,-32768,-32768,-32768,-32768, 6, 32, 31, 31, 31,
- 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
- 31, 31, 31, 31, 31, 31, 31, 7,-32768, 80,
- 59, 97, 113, 128, 142, 155, 25, 25, 162, 162,
- 162, 162, 167, 167, -19, -19,-32768,-32768,-32768, 5,
- 31, 5, 5, -20, 80,-32768, 20,-32768, 5,-32768,
- 40, 56,-32768
- };
-
- static const short yypgoto[] = {-32768,
- 49, -4,-32768, -58
- };
-
-
- #define YYLAST 194
-
-
- static const short yytable[] = { 12,
- 13, 14, 15, 66, 67, 35, 36, 37, 16, 62,
- 70, 18, 68, 40, 41, 42, 43, 44, 45, 46,
- 47, 48, 49, 50, 51, 52, 53, 54, 55, 56,
- 57, 58, 59, 1, 2, 3, 63, -9, 60, 72,
- 18, 27, 28, 29, 30, 31, 32, 33, 34, 35,
- 36, 37, 69, 4, 5, 73, 65, 17, 0, 6,
- 7, 8, 9, 0, 39, 19, 61, 0, 20, 21,
- 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
- 32, 33, 34, 35, 36, 37, 19, 0, 0, 20,
- 21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
- 31, 32, 33, 34, 35, 36, 37, 21, 22, 23,
- 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
- 34, 35, 36, 37, 22, 23, 24, 25, 26, 27,
- 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
- 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
- 33, 34, 35, 36, 37, 24, 25, 26, 27, 28,
- 29, 30, 31, 32, 33, 34, 35, 36, 37, 25,
- 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
- 36, 37, 31, 32, 33, 34, 35, 36, 37, 33,
- 34, 35, 36, 37
- };
-
- static const short yycheck[] = { 4,
- 5, 6, 7, 62, 63, 25, 26, 27, 5, 5,
- 69, 9, 33, 18, 19, 20, 21, 22, 23, 24,
- 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,
- 35, 36, 37, 3, 4, 5, 32, 32, 32, 0,
- 9, 17, 18, 19, 20, 21, 22, 23, 24, 25,
- 26, 27, 33, 23, 24, 0, 61, 9, -1, 29,
- 30, 31, 32, -1, 33, 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, 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, 21, 22, 23, 24, 25, 26, 27, 23,
- 24, 25, 26, 27
- };
- /* -*-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 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 "/usr/local/lib/bison.simple"
-
- /* The user can define YYPARSE_PARAM as the name of an argument to be passed
- into yyparse. The argument should have type void *.
- It should actually point to an object.
- Grammar actions can access the variable by casting it
- to the proper pointer type. */
-
- #ifdef YYPARSE_PARAM
- #define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
- #else
- #define YYPARSE_PARAM
- #define YYPARSE_PARAM_DECL
- #endif
-
- int
- yyparse(YYPARSE_PARAM)
- YYPARSE_PARAM_DECL
- {
- 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 160 "cexp.y"
- { expression_value = yyvsp[0].integer.value; ;
- break;}
- case 3:
- #line 166 "cexp.y"
- { if (pedantic)
- pedwarn ("comma operator in operand of `#if'");
- yyval.integer = yyvsp[0].integer; ;
- break;}
- case 4:
- #line 173 "cexp.y"
- { yyval.integer.value = - yyvsp[0].integer.value;
- if ((yyval.integer.value & yyvsp[0].integer.value) < 0 && ! yyvsp[0].integer.unsignedp)
- integer_overflow ();
- yyval.integer.unsignedp = yyvsp[0].integer.unsignedp; ;
- break;}
- case 5:
- #line 178 "cexp.y"
- { yyval.integer.value = ! yyvsp[0].integer.value;
- yyval.integer.unsignedp = 0; ;
- break;}
- case 6:
- #line 181 "cexp.y"
- { yyval.integer = yyvsp[0].integer; ;
- break;}
- case 7:
- #line 183 "cexp.y"
- { yyval.integer.value = ~ yyvsp[0].integer.value;
- yyval.integer.unsignedp = yyvsp[0].integer.unsignedp; ;
- break;}
- case 8:
- #line 186 "cexp.y"
- { yyval.integer.value = check_assertion (yyvsp[0].name.address, yyvsp[0].name.length,
- 0, NULL_PTR);
- yyval.integer.unsignedp = 0; ;
- break;}
- case 9:
- #line 190 "cexp.y"
- { keyword_parsing = 1; ;
- break;}
- case 10:
- #line 192 "cexp.y"
- { yyval.integer.value = check_assertion (yyvsp[-4].name.address, yyvsp[-4].name.length,
- 1, yyvsp[-1].keywords);
- keyword_parsing = 0;
- yyval.integer.unsignedp = 0; ;
- break;}
- case 11:
- #line 197 "cexp.y"
- { yyval.integer = yyvsp[-1].integer; ;
- break;}
- case 12:
- #line 202 "cexp.y"
- { yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp;
- if (yyval.integer.unsignedp)
- yyval.integer.value = (unsigned long) yyvsp[-2].integer.value * yyvsp[0].integer.value;
- else
- {
- yyval.integer.value = yyvsp[-2].integer.value * yyvsp[0].integer.value;
- if (yyvsp[-2].integer.value
- && (yyval.integer.value / yyvsp[-2].integer.value != yyvsp[0].integer.value
- || (yyval.integer.value & yyvsp[-2].integer.value & yyvsp[0].integer.value) < 0))
- integer_overflow ();
- } ;
- break;}
- case 13:
- #line 214 "cexp.y"
- { if (yyvsp[0].integer.value == 0)
- {
- error ("division by zero in #if");
- yyvsp[0].integer.value = 1;
- }
- yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp;
- if (yyval.integer.unsignedp)
- yyval.integer.value = (unsigned long) yyvsp[-2].integer.value / yyvsp[0].integer.value;
- else
- {
- yyval.integer.value = yyvsp[-2].integer.value / yyvsp[0].integer.value;
- if ((yyval.integer.value & yyvsp[-2].integer.value & yyvsp[0].integer.value) < 0)
- integer_overflow ();
- } ;
- break;}
- case 14:
- #line 229 "cexp.y"
- { if (yyvsp[0].integer.value == 0)
- {
- error ("division by zero in #if");
- yyvsp[0].integer.value = 1;
- }
- yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp;
- if (yyval.integer.unsignedp)
- yyval.integer.value = (unsigned long) yyvsp[-2].integer.value % yyvsp[0].integer.value;
- else
- yyval.integer.value = yyvsp[-2].integer.value % yyvsp[0].integer.value; ;
- break;}
- case 15:
- #line 240 "cexp.y"
- { yyval.integer.value = yyvsp[-2].integer.value + yyvsp[0].integer.value;
- yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp;
- if (! yyval.integer.unsignedp
- && ! possible_sum_sign (yyvsp[-2].integer.value, yyvsp[0].integer.value,
- yyval.integer.value))
- integer_overflow (); ;
- break;}
- case 16:
- #line 247 "cexp.y"
- { yyval.integer.value = yyvsp[-2].integer.value - yyvsp[0].integer.value;
- yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp;
- if (! yyval.integer.unsignedp
- && ! possible_sum_sign (yyval.integer.value, yyvsp[0].integer.value,
- yyvsp[-2].integer.value))
- integer_overflow (); ;
- break;}
- case 17:
- #line 254 "cexp.y"
- { yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp;
- if (yyvsp[0].integer.value < 0 && ! yyvsp[0].integer.unsignedp)
- yyval.integer.value = right_shift (&yyvsp[-2].integer, -yyvsp[0].integer.value);
- else
- yyval.integer.value = left_shift (&yyvsp[-2].integer, yyvsp[0].integer.value); ;
- break;}
- case 18:
- #line 260 "cexp.y"
- { yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp;
- if (yyvsp[0].integer.value < 0 && ! yyvsp[0].integer.unsignedp)
- yyval.integer.value = left_shift (&yyvsp[-2].integer, -yyvsp[0].integer.value);
- else
- yyval.integer.value = right_shift (&yyvsp[-2].integer, yyvsp[0].integer.value); ;
- break;}
- case 19:
- #line 266 "cexp.y"
- { yyval.integer.value = (yyvsp[-2].integer.value == yyvsp[0].integer.value);
- yyval.integer.unsignedp = 0; ;
- break;}
- case 20:
- #line 269 "cexp.y"
- { yyval.integer.value = (yyvsp[-2].integer.value != yyvsp[0].integer.value);
- yyval.integer.unsignedp = 0; ;
- break;}
- case 21:
- #line 272 "cexp.y"
- { yyval.integer.unsignedp = 0;
- if (yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp)
- yyval.integer.value = (unsigned long) yyvsp[-2].integer.value <= yyvsp[0].integer.value;
- else
- yyval.integer.value = yyvsp[-2].integer.value <= yyvsp[0].integer.value; ;
- break;}
- case 22:
- #line 278 "cexp.y"
- { yyval.integer.unsignedp = 0;
- if (yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp)
- yyval.integer.value = (unsigned long) yyvsp[-2].integer.value >= yyvsp[0].integer.value;
- else
- yyval.integer.value = yyvsp[-2].integer.value >= yyvsp[0].integer.value; ;
- break;}
- case 23:
- #line 284 "cexp.y"
- { yyval.integer.unsignedp = 0;
- if (yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp)
- yyval.integer.value = (unsigned long) yyvsp[-2].integer.value < yyvsp[0].integer.value;
- else
- yyval.integer.value = yyvsp[-2].integer.value < yyvsp[0].integer.value; ;
- break;}
- case 24:
- #line 290 "cexp.y"
- { yyval.integer.unsignedp = 0;
- if (yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp)
- yyval.integer.value = (unsigned long) yyvsp[-2].integer.value > yyvsp[0].integer.value;
- else
- yyval.integer.value = yyvsp[-2].integer.value > yyvsp[0].integer.value; ;
- break;}
- case 25:
- #line 296 "cexp.y"
- { yyval.integer.value = yyvsp[-2].integer.value & yyvsp[0].integer.value;
- yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp; ;
- break;}
- case 26:
- #line 299 "cexp.y"
- { yyval.integer.value = yyvsp[-2].integer.value ^ yyvsp[0].integer.value;
- yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp; ;
- break;}
- case 27:
- #line 302 "cexp.y"
- { yyval.integer.value = yyvsp[-2].integer.value | yyvsp[0].integer.value;
- yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp; ;
- break;}
- case 28:
- #line 305 "cexp.y"
- { yyval.integer.value = (yyvsp[-2].integer.value && yyvsp[0].integer.value);
- yyval.integer.unsignedp = 0; ;
- break;}
- case 29:
- #line 308 "cexp.y"
- { yyval.integer.value = (yyvsp[-2].integer.value || yyvsp[0].integer.value);
- yyval.integer.unsignedp = 0; ;
- break;}
- case 30:
- #line 311 "cexp.y"
- { yyval.integer.value = yyvsp[-4].integer.value ? yyvsp[-2].integer.value : yyvsp[0].integer.value;
- yyval.integer.unsignedp = yyvsp[-2].integer.unsignedp || yyvsp[0].integer.unsignedp; ;
- break;}
- case 31:
- #line 314 "cexp.y"
- { yyval.integer = yylval.integer; ;
- break;}
- case 32:
- #line 316 "cexp.y"
- { yyval.integer = yylval.integer; ;
- break;}
- case 33:
- #line 318 "cexp.y"
- { yyval.integer.value = 0;
- yyval.integer.unsignedp = 0; ;
- break;}
- case 34:
- #line 323 "cexp.y"
- { yyval.keywords = 0; ;
- break;}
- case 35:
- #line 325 "cexp.y"
- { struct arglist *temp;
- yyval.keywords = (struct arglist *) xmalloc (sizeof (struct arglist));
- yyval.keywords->next = yyvsp[-2].keywords;
- yyval.keywords->name = (U_CHAR *) "(";
- yyval.keywords->length = 1;
- temp = yyval.keywords;
- while (temp != 0 && temp->next != 0)
- temp = temp->next;
- temp->next = (struct arglist *) xmalloc (sizeof (struct arglist));
- temp->next->next = yyvsp[0].keywords;
- temp->next->name = (U_CHAR *) ")";
- temp->next->length = 1; ;
- break;}
- case 36:
- #line 338 "cexp.y"
- { yyval.keywords = (struct arglist *) xmalloc (sizeof (struct arglist));
- yyval.keywords->name = yyvsp[-1].name.address;
- yyval.keywords->length = yyvsp[-1].name.length;
- yyval.keywords->next = yyvsp[0].keywords; ;
- break;}
- }
- /* the action file gets copied in in place of this dollarsign */
- #line 480 "/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;
- /* 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 343 "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 int c;
- register unsigned long n = 0, nd, ULONG_MAX_over_base;
- register int base = 10;
- register int len = olen;
- register int overflow = 0;
- register int digit, largest_digit = 0;
- int spec_long = 0;
-
- 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.integer.unsignedp = 0;
-
- if (len >= 3 && (!strncmp (p, "0x", 2) || !strncmp (p, "0X", 2))) {
- p += 2;
- base = 16;
- len -= 2;
- }
- else if (*p == '0')
- base = 8;
-
- ULONG_MAX_over_base = (unsigned long) -1 / base;
-
- for (; len > 0; len--) {
- c = *p++;
-
- if (c >= '0' && c <= '9')
- digit = c - '0';
- else if (base == 16 && c >= 'a' && c <= 'f')
- digit = c - 'a' + 10;
- else if (base == 16 && c >= 'A' && c <= 'F')
- digit = c - 'A' + 10;
- else {
- /* `l' means long, and `u' means unsigned. */
- while (1) {
- if (c == 'l' || c == 'L')
- {
- if (spec_long)
- yyerror ("two `l's in integer constant");
- spec_long = 1;
- }
- else if (c == 'u' || c == 'U')
- {
- if (yylval.integer.unsignedp)
- yyerror ("two `u's in integer constant");
- yylval.integer.unsignedp = 1;
- }
- else
- break;
-
- if (--len == 0)
- break;
- c = *p++;
- }
- /* Don't look for any more digits after the suffixes. */
- break;
- }
- if (largest_digit < digit)
- largest_digit = digit;
- nd = n * base + digit;
- overflow |= ULONG_MAX_over_base < n | nd < n;
- n = nd;
- }
-
- if (len != 0) {
- yyerror ("Invalid number in #if expression");
- return ERROR;
- }
-
- if (base <= largest_digit)
- warning ("integer constant contains digits beyond the radix");
-
- if (overflow)
- warning ("integer constant out of range");
-
- /* If too big to be signed, consider it unsigned. */
- if ((long) n < 0 && ! yylval.integer.unsignedp)
- {
- if (base == 10)
- warning ("integer constant is so large that it is unsigned");
- yylval.integer.unsignedp = 1;
- }
-
- lexptr = p;
- yylval.integer.value = n;
- return INT;
- }
-
- struct token {
- char *operator;
- int token;
- };
-
- static struct token tokentab2[] = {
- {"&&", AND},
- {"||", OR},
- {"<<", LSH},
- {">>", RSH},
- {"==", EQUAL},
- {"!=", NOTEQUAL},
- {"<=", LEQ},
- {">=", GEQ},
- {"++", ERROR},
- {"--", ERROR},
- {NULL, ERROR}
- };
-
- /* Read one token, getting characters through lexptr. */
-
- int
- yylex ()
- {
- register int c;
- register int namelen;
- register unsigned char *tokstart;
- register struct token *toktab;
- int wide_flag;
-
- retry:
-
- tokstart = (unsigned char *) lexptr;
- c = *tokstart;
- /* See if it is a special token of length 2. */
- if (! keyword_parsing)
- for (toktab = tokentab2; toktab->operator != NULL; toktab++)
- if (c == *toktab->operator && tokstart[1] == toktab->operator[1]) {
- lexptr += 2;
- if (toktab->token == ERROR)
- {
- char *buf = (char *) alloca (40);
- sprintf (buf, "`%s' not allowed in operand of `#if'", toktab->operator);
- yyerror (buf);
- }
- return toktab->token;
- }
-
- switch (c) {
- case 0:
- return 0;
-
- case ' ':
- case '\t':
- case '\r':
- case '\n':
- lexptr++;
- goto retry;
-
- case 'L':
- /* Capital L may start a wide-string or wide-character constant. */
- if (lexptr[1] == '\'')
- {
- lexptr++;
- wide_flag = 1;
- goto char_constant;
- }
- if (lexptr[1] == '"')
- {
- lexptr++;
- wide_flag = 1;
- goto string_constant;
- }
- break;
-
- case '\'':
- wide_flag = 0;
- char_constant:
- lexptr++;
- if (keyword_parsing) {
- char *start_ptr = lexptr - 1;
- while (1) {
- c = *lexptr++;
- if (c == '\\')
- c = parse_escape (&lexptr);
- else if (c == '\'')
- break;
- }
- yylval.name.address = tokstart;
- yylval.name.length = lexptr - start_ptr;
- return NAME;
- }
-
- /* This code for reading a character constant
- handles multicharacter constants and wide characters.
- It is mostly copied from c-lex.c. */
- {
- register int result = 0;
- register num_chars = 0;
- unsigned width = MAX_CHAR_TYPE_SIZE;
- int max_chars;
- char *token_buffer;
-
- if (wide_flag)
- {
- width = MAX_WCHAR_TYPE_SIZE;
- #ifdef MULTIBYTE_CHARS
- max_chars = MB_CUR_MAX;
- #else
- max_chars = 1;
- #endif
- }
- else
- max_chars = MAX_LONG_TYPE_SIZE / width;
-
- token_buffer = (char *) alloca (max_chars + 1);
-
- while (1)
- {
- c = *lexptr++;
-
- if (c == '\'' || c == EOF)
- break;
-
- if (c == '\\')
- {
- c = parse_escape (&lexptr);
- if (width < HOST_BITS_PER_INT
- && (unsigned) c >= (1 << width))
- pedwarn ("escape sequence out of range for character");
- }
-
- num_chars++;
-
- /* Merge character into result; ignore excess chars. */
- if (num_chars < max_chars + 1)
- {
- if (width < HOST_BITS_PER_INT)
- result = (result << width) | (c & ((1 << width) - 1));
- else
- result = c;
- token_buffer[num_chars - 1] = c;
- }
- }
-
- token_buffer[num_chars] = 0;
-
- if (c != '\'')
- error ("malformatted character constant");
- else if (num_chars == 0)
- error ("empty character constant");
- else if (num_chars > max_chars)
- {
- num_chars = max_chars;
- error ("character constant too long");
- }
- else if (num_chars != 1 && ! traditional)
- warning ("multi-character character constant");
-
- /* If char type is signed, sign-extend the constant. */
- if (! wide_flag)
- {
- int num_bits = num_chars * width;
-
- if (lookup ("__CHAR_UNSIGNED__", sizeof ("__CHAR_UNSIGNED__")-1, -1)
- || ((result >> (num_bits - 1)) & 1) == 0)
- yylval.integer.value
- = result & ((unsigned long) ~0 >> (HOST_BITS_PER_LONG - num_bits));
- else
- yylval.integer.value
- = result | ~((unsigned long) ~0 >> (HOST_BITS_PER_LONG - num_bits));
- }
- else
- {
- #ifdef MULTIBYTE_CHARS
- /* Set the initial shift state and convert the next sequence. */
- result = 0;
- /* In all locales L'\0' is zero and mbtowc will return zero,
- so don't use it. */
- if (num_chars > 1
- || (num_chars == 1 && token_buffer[0] != '\0'))
- {
- wchar_t wc;
- (void) mbtowc (NULL_PTR, NULL_PTR, 0);
- if (mbtowc (& wc, token_buffer, num_chars) == num_chars)
- result = wc;
- else
- warning ("Ignoring invalid multibyte character");
- }
- #endif
- yylval.integer.value = result;
- }
- }
-
- /* This is always a signed type. */
- yylval.integer.unsignedp = 0;
-
- 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 '#':
- if (keyword_parsing)
- break;
- case '(':
- case ')':
- lexptr++;
- return c;
-
- case '"':
- string_constant:
- if (keyword_parsing) {
- char *start_ptr = lexptr;
- lexptr++;
- while (1) {
- c = *lexptr++;
- if (c == '\\')
- c = parse_escape (&lexptr);
- else if (c == '"')
- break;
- }
- yylval.name.address = tokstart;
- yylval.name.length = lexptr - start_ptr;
- return NAME;
- }
- yyerror ("string constants not allowed in #if expressions");
- return ERROR;
- }
-
- if (c >= '0' && c <= '9' && !keyword_parsing) {
- /* It's a number */
- for (namelen = 0;
- c = tokstart[namelen], is_idchar[c] || c == '.';
- namelen++)
- ;
- return parse_number (namelen);
- }
-
- /* It is a name. See how long it is. */
-
- if (keyword_parsing) {
- for (namelen = 0;; namelen++) {
- if (is_hor_space[tokstart[namelen]])
- break;
- if (tokstart[namelen] == '(' || tokstart[namelen] == ')')
- break;
- if (tokstart[namelen] == '"' || tokstart[namelen] == '\'')
- break;
- }
- } else {
- if (!is_idstart[c]) {
- yyerror ("Invalid token in expression");
- return ERROR;
- }
-
- for (namelen = 0; is_idchar[tokstart[namelen]]; namelen++)
- ;
- }
-
- lexptr += namelen;
- yylval.name.address = tokstart;
- yylval.name.length = 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 TARGET_BELL;
- case 'b':
- return TARGET_BS;
- case 'e':
- case 'E':
- if (pedantic)
- pedwarn ("non-ANSI-standard escape sequence, `\\%c'", c);
- return 033;
- case 'f':
- return TARGET_FF;
- case 'n':
- return TARGET_NEWLINE;
- case 'r':
- return TARGET_CR;
- case 't':
- return TARGET_TAB;
- case 'v':
- return TARGET_VT;
- case '\n':
- return -2;
- case 0:
- (*string_ptr)--;
- return 0;
-
- 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)
- {
- c = *(*string_ptr)++;
- if (c >= '0' && c <= '7')
- i = (i << 3) + c - '0';
- else
- {
- (*string_ptr)--;
- break;
- }
- }
- if ((i & ~((1 << MAX_CHAR_TYPE_SIZE) - 1)) != 0)
- {
- i &= (1 << MAX_CHAR_TYPE_SIZE) - 1;
- warning ("octal character constant does not fit in a byte");
- }
- return i;
- }
- case 'x':
- {
- register unsigned i = 0, overflow = 0, digits_found = 0, digit;
- for (;;)
- {
- c = *(*string_ptr)++;
- if (c >= '0' && c <= '9')
- digit = c - '0';
- else if (c >= 'a' && c <= 'f')
- digit = c - 'a' + 10;
- else if (c >= 'A' && c <= 'F')
- digit = c - 'A' + 10;
- else
- {
- (*string_ptr)--;
- break;
- }
- overflow |= i ^ (i << 4 >> 4);
- i = (i << 4) + digit;
- digits_found = 1;
- }
- if (!digits_found)
- yyerror ("\\x used with no following hex digits");
- if (overflow | (i & ~((1 << BITS_PER_UNIT) - 1)))
- {
- i &= (1 << BITS_PER_UNIT) - 1;
- warning ("hex character constant does not fit in a byte");
- }
- return i;
- }
- default:
- return c;
- }
- }
-
- void
- yyerror (s)
- char *s;
- {
- error (s);
- longjmp (parse_return_error, 1);
- }
-
- static void
- integer_overflow ()
- {
- if (pedantic)
- pedwarn ("integer overflow in preprocessor expression");
- }
-
- static long
- left_shift (a, b)
- struct constant *a;
- unsigned long b;
- {
- if (b >= HOST_BITS_PER_LONG)
- {
- if (! a->unsignedp && a->value != 0)
- integer_overflow ();
- return 0;
- }
- else if (a->unsignedp)
- return (unsigned long) a->value << b;
- else
- {
- long l = a->value << b;
- if (l >> b != a->value)
- integer_overflow ();
- return l;
- }
- }
-
- static long
- right_shift (a, b)
- struct constant *a;
- unsigned long b;
- {
- if (b >= HOST_BITS_PER_LONG)
- return a->unsignedp ? 0 : a->value >> (HOST_BITS_PER_LONG - 1);
- else if (a->unsignedp)
- return (unsigned long) a->value >> b;
- else
- return a->value >> b;
- }
-
- /* 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
- extern int yydebug;
-
- /* Main program for testing purposes. */
- int
- main ()
- {
- int n, c;
- char buf[1024];
-
- /*
- yydebug = 1;
- */
- initialize_random_junk ();
-
- for (;;) {
- printf ("enter expression: ");
- n = 0;
- while ((buf[n] = getchar ()) != '\n' && buf[n] != EOF)
- n++;
- if (buf[n] == EOF)
- break;
- buf[n] = '\0';
- printf ("parser returned %d\n", parse_c_expression (buf));
- }
-
- return 0;
- }
-
- /* table to tell if char can be part of a C identifier. */
- unsigned char is_idchar[256];
- /* table to tell if char can be first char of a c identifier. */
- unsigned 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['_'];
- #if 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);
- }
-
- warning (msg)
- {
- printf ("warning: %s\n", msg);
- }
-
- struct hashnode *
- lookup (name, len, hash)
- char *name;
- int len;
- int hash;
- {
- return (DEFAULT_SIGNED_CHAR) ? 0 : ((struct hashnode *) -1);
- }
- #endif
-