269 lines
6.9 KiB
Plaintext
269 lines
6.9 KiB
Plaintext
%{
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/*
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* Copyright (c) 1997-2000 Erez Zadok
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* Copyright (c) 1989 Jan-Simon Pendry
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* Copyright (c) 1989 Imperial College of Science, Technology & Medicine
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry at Imperial College, London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgment:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* %W% (Berkeley) %G%
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*
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* Id: fsi_lex.l,v 1.4 2000/01/12 16:44:58 ezk Exp
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*
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*/
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/*
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* Lexical analyzer for fsinfo.
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* TODO: Needs rewriting.
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*/
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#ifdef FLEX_SCANNER
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static int yylineno;
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# define INIT_STATE { \
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switch ((yy_start - 1) / 2) { \
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case 0: \
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BEGIN F; \
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break; \
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} \
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}
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#else /* not FLEX_SCANNER */
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/*
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* Using old lex...
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*/
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# define INIT_STATE { \
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switch (yybgin - yysvec - 1) { \
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case 0: \
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BEGIN F; \
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break; \
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} \
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}
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#endif /* end FLEX_SCANNER */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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/*
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* Some systems include a definition for the macro ECHO in <sys/ioctl.h>,
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* and their (bad) version of lex defines it too at the very beginning of
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* the generated lex.yy.c file (before it can be easily undefined),
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* resulting in a conflict. So undefine it here before needed.
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* Luckily, it does not appear that this macro is actually used in the rest
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* of the generated lex.yy.c file.
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*/
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#ifdef ECHO
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# undef ECHO
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#endif /* ECHO */
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#include <am_defs.h>
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#include <fsi_data.h>
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#include <fsinfo.h>
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#include <fsi_gram.h>
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/* and once again undefine this, just in case */
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#ifdef ECHO
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# undef ECHO
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#endif /* ECHO */
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/*
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* There are some things that need to be defined only if using GNU flex.
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* These must not be defined if using standard lex
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*/
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#ifdef FLEX_SCANNER
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# ifndef ECHO
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# define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
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# endif /* not ECHO */
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#endif /* FLEX_SCANNER */
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/*
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* some systems such as DU-4.x have a different GNU flex in /usr/bin
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* which automatically generates yywrap macros and symbols. So I must
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* distinguish between them and when yywrap is actually needed.
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*/
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#ifndef yywrap
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int yywrap(void);
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#endif /* not yywrap */
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YYSTYPE yylval;
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static char *fsi_filename;
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static char *optr;
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static char ostr[1024];
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static int find_resword(char *);
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static int quoted;
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struct r {
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char *rw;
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int tok;
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} rr[] = {
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{ "->", tEQ },
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{ "arch", tARCH },
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{ "as", tAS },
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{ "automount", tAUTOMOUNT },
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{ "cluster", tCLUSTER },
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{ "config", tCONFIG },
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{ "direct", tDIRECT },
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{ "dumpset", tDUMPSET },
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{ "exportfs", tEXPORTFS },
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{ "freq", tFREQ },
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{ "from", tFROM },
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{ "fs", tFS },
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{ "fstype", tFSTYPE },
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{ "host", tHOST },
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{ "hwaddr", tHWADDR },
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{ "inaddr", tINADDR },
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{ "localhost", tLOCALHOST },
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{ "log", tLOG },
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{ "mount", tMOUNT },
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{ "netif", tNETIF },
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{ "netmask", tNETMASK },
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{ "nfsalias", tNFSEQ },
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{ "opts", tOPTS },
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{ "os", tOS },
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{ "passno", tPASSNO },
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{ "sel", tSEL },
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{ "volname", tVOLNAME },
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{ 0, 0 },
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};
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#define NRES_WORDS (sizeof(rr)/sizeof(rr[0])-1)
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%}
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%start F Q
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%%
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INIT_STATE; /* witchcraft */
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<F>[^ \t\n"={}]+ { return find_resword(yytext); } /* dummy " */
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<F>[ \t] ;
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<F>"\n" { yylineno++; }
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<F>[={}] { return *yytext; }
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<F>\" { BEGIN Q; optr = ostr; quoted = 1; }
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<Q>\n { yylineno++; yyerror("\" expected"); BEGIN F; }
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<Q>\\b { *optr++ = '\b'; /* escape */ }
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<Q>\\t { *optr++ = '\t'; /* escape */ }
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<Q>\\\" { *optr++ = '\"'; /* escape */ }
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<Q>\\\\ { *optr++ = '\\'; /* escape */ }
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<Q>\\\n { yylineno++; /* continue */ }
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<Q>\\r { *optr++ = '\r'; /* escape */ }
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<Q>\\n { *optr++ = '\n'; /* escape */ }
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<Q>\\f { *optr++ = '\f'; /* escape */ }
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<Q>"\\ " { *optr++ = ' '; /* force space */ }
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<Q>\\. { yyerror("Unknown \\ sequence"); }
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<Q>([ \t]|"\\\n"){2,} { char *p = (char *) yytext-1; while ((p = strchr(p+1, '\n'))) yylineno++; }
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<Q>\" { BEGIN F; quoted = 0;
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*optr = '\0';
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yylval.s = strdup(ostr);
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return tSTR;
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}
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<Q>. { *optr++ = *yytext; }
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%%
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static int
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find_resword(char *s)
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{
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int tok = 0;
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int l = 0, m = NRES_WORDS/2, h = NRES_WORDS-1;
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int rc = 0;
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m = NRES_WORDS/2;
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#define FSTRCMP(p, q) ((*(p) == *(q)) ? strcmp((p)+1, (q)+1) : *(p) - *(q))
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while ((l <= h) && (rc = FSTRCMP(s, rr[m].rw))) {
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if (rc < 0)
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h = m - 1;
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else
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l = m + 1;
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m = (h + l) / 2;
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}
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if (rc == 0)
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tok = rr[m].tok;
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switch (tok) {
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case tLOCALHOST:
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s = "${host}";
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/* fall through... */
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case 0:
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yylval.s = strdup(s);
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tok = tSTR;
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/* fall through... */
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default:
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return tok;
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}
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}
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int
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yyerror(char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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col_cleanup(0);
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fprintf(stderr, "%s:%d: ", fsi_filename ? fsi_filename : "/dev/stdin", yylineno);
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fprintf(stderr, fmt, ap);
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fputc('\n', stderr);
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parse_errors++;
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va_end(ap);
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if (0) unput(0);/* dummy to shut gcc up: "unput defined but not used" */
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return 0;
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}
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ioloc *
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current_location(void)
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{
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ioloc *ip = CALLOC(struct ioloc);
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ip->i_line = yylineno;
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ip->i_file = fsi_filename;
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return ip;
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}
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/*
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* some systems such as DU-4.x have a different GNU flex in /usr/bin
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* which automatically generates yywrap macros and symbols. So I must
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* distinguish between them and when yywrap is actually needed.
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*/
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#ifndef yywrap
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int yywrap(void)
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{
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return 1;
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}
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#endif /* not yywrap */
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