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Lex Description | 1992-02-14 | 3.5 KB | 147 lines |
- %{
- /*
- * Copyright (c) 1988-1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- static char rcsid[] =
- "@(#) $Header: tcplex.l,v 1.26 92/02/14 15:16:35 mccanne Exp $ (LBL)";
- #endif
-
- /*
- * Compiling with gcc under SunOS will cause problems unless we have this
- * cruft here. The flex skeleton includes stddef.h which defines these types
- * (under gcc). They will conflict with Sun's definitions in sys/types.h.
- */
- #define size_t xxxsize_t
- #define ptrdiff_t xxxptrdiff_t
- #define wchar_t xxxwchar_t
- #include <sys/types.h>
- #undef size_t
- #undef ptrdiff_t
- #undef wchar_t
-
- #include "nametoaddr.h"
-
- /*
- * We need bpf since enum bpf_code is in YYSTYPE.
- */
- #include <sys/time.h>
- #include <net/bpf.h>
-
- #include "gencode.h"
- #include "tokdefs.h"
-
- #ifdef FLEX_SCANNER
- #undef YY_INPUT
- #define YY_INPUT(buf, result, max)\
- {\
- char *src = in_buffer;\
- int i;\
- \
- if (*src == 0)\
- result = YY_NULL;\
- else {\
- for (i = 0; *src && i < max; ++i)\
- buf[i] = *src++;\
- in_buffer += i;\
- result = i;\
- }\
- }
- #else
- #undef getc
- #define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++)
- #endif
-
- extern YYSTYPE yylval;
- static char *in_buffer;
-
- %}
-
- N ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
- B ([0-9A-Fa-f][0-9A-Fa-f]?)
-
- %a 3000
-
- %%
- dst return DST;
- src return SRC;
-
- link|ether|ppp|slip return LINK;
- arp return ARP;
- rarp return RARP;
- ip return IP;
- tcp return TCP;
- udp return UDP;
- icmp return ICMP;
-
- host return HOST;
- net return NET;
- port return PORT;
- proto return PROTO;
-
- gateway return GATEWAY;
-
- less return LESS;
- greater return GREATER;
- byte return BYTE;
- broadcast return TK_BROADCAST;
- multicast return TK_MULTICAST;
-
- and return AND;
- or return OR;
- not return '!';
-
- len return LEN;
-
- [ \n\t] ;
- [+\-*/:\[\]!<>()&|=] return yytext[0];
- ">=" return GEQ;
- "<=" return LEQ;
- "!=" return NEQ;
- "==" return '=';
- "<<" return LSH;
- ">>" return RSH;
- {N} { yylval.i = stoi(yytext); return NUM; }
- ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
- yylval.h = atoin(yytext); return HID;
- }
- {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = ETHER_aton(yytext); return EID; }
- {B}:+({B}:+)+ { error("bogus ethernet address %s", yytext); }
- [A-Za-z][-_.A-Za-z0-9]* { yylval.s = yytext; return ID; }
- "\\"[^ !()\n\t]+ { yylval.s = yytext + 1; return ID; }
- [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ { error("illegal token: %s\n", yytext); }
- . { error("illegal char '%c'", *yytext); }
- %%
- void
- lex_init(buf)
- char *buf;
- {
- in_buffer = buf;
- }
- #ifndef FLEX_SCANNER
- int
- yywrap()
- /* so we don't need -ll */
- {
- return 1;
- }
- #endif
-