%{
/* sieve.l -- sieve lexer
 * Larry Greenfield
 *
 * Copyright (c) 1994-2008 Carnegie Mellon University.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The name "Carnegie Mellon University" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For permission or any legal
 *    details, please contact
 *      Carnegie Mellon University
 *      Center for Technology Transfer and Enterprise Creation
 *      4615 Forbes Avenue
 *      Suite 302
 *      Pittsburgh, PA  15213
 *      (412) 268-7393, fax: (412) 268-7395
 *      innovation@andrew.cmu.edu
 *
 * 4. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by Computing Services
 *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
 *
 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * $Id: sieve-lex.l,v 1.24 2010/01/06 17:01:59 murch Exp $
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h> /* for strdup */
#include "xmalloc.h"

#include "tree.h"
#include "sieve.h"

#define YY_NO_INPUT

static int tonum(char *c);
static char *chkstr(char *);
static char *mlbuf;
static int mlbufsz, mlcur;
extern int yyerror(char *);
%}

%option yylineno
%option noyywrap
%option nounput

ws		[ \t]+
ident		[a-zA-Z_][a-zA-Z_0-9]*
CRLF		(\r\n|\r|\n)

%state MULTILINE
%state QSTRING

%%
<MULTILINE>^\.{CRLF}	{ BEGIN INITIAL; 
                          if (mlbuf) mlbuf[mlcur] = '\0';
                          yylval.sval = chkstr(mlbuf); return STRING; }
<MULTILINE>^\.\.  { /* dot stuffing! we want one . */ yyless(1); }
<MULTILINE>(.|\n) { if (mlcur == mlbufsz) 
			mlbuf = xrealloc(mlbuf, 1 + (mlbufsz+=1024));
		    mlbuf[mlcur++] = yytext[0]; }
<MULTILINE><<EOF>> { yyerror("unexpected end of file in string"); 
		     yyterminate(); }
<QSTRING>\"        { BEGIN INITIAL;
                     if (mlbuf) mlbuf[mlcur] = '\0';
		     yylval.sval = chkstr(mlbuf); return STRING; }
<QSTRING>\\.      { if (mlcur == mlbufsz) 
			mlbuf = xrealloc(mlbuf, 1 + (mlbufsz+=1024));
		    mlbuf[mlcur++] = yytext[1]; }
<QSTRING>(.|\n)   { if (mlcur == mlbufsz) 
			mlbuf = xrealloc(mlbuf, 1 + (mlbufsz+=1024));
		    mlbuf[mlcur++] = yytext[0]; }
<INITIAL>text:{ws}?(#.*)?{CRLF}	{ BEGIN MULTILINE;
			  mlcur = 0; mlbufsz = 0; mlbuf = NULL; }
<INITIAL>\"        { BEGIN QSTRING;
                    mlcur = 0; mlbufsz = 0; mlbuf = NULL; }
<INITIAL>[0-9]+[KMGkmg]?	{ yylval.nval = tonum(yytext); return NUMBER; }
<INITIAL>if		return IF;
<INITIAL>elsif		return ELSIF;
<INITIAL>else		return ELSE;
<INITIAL>anyof		return ANYOF;
<INITIAL>allof		return ALLOF;
<INITIAL>exists		return EXISTS;
<INITIAL>false		return SFALSE;
<INITIAL>true		return STRUE;
<INITIAL>address	return ADDRESS;
<INITIAL>envelope	return ENVELOPE;
<INITIAL>header		return HEADER;
<INITIAL>body		return BODY;
<INITIAL>not		return NOT;
<INITIAL>size		return SIZE;
<INITIAL>reject		return REJCT;
<INITIAL>fileinto	return FILEINTO;
<INITIAL>redirect	return REDIRECT;
<INITIAL>keep		return KEEP;
<INITIAL>require	return REQUIRE;
<INITIAL>stop		return STOP;
<INITIAL>discard	return DISCARD;
<INITIAL>setflag	return SETFLAG;
<INITIAL>addflag	return ADDFLAG;
<INITIAL>removeflag	return REMOVEFLAG;
<INITIAL>mark		return MARK;
<INITIAL>unmark		return UNMARK;
<INITIAL>notify		return NOTIFY;
<INITIAL>denotify	return DENOTIFY;
<INITIAL>:id		return ID;
<INITIAL>:method	return METHOD;
<INITIAL>:options	return OPTIONS;
<INITIAL>:low		return LOW;
<INITIAL>:normal	return NORMAL;
<INITIAL>:high		return HIGH;
<INITIAL>:message	return MESSAGE;
<INITIAL>vacation	return VACATION;
<INITIAL>:days		return DAYS;
<INITIAL>:addresses	return ADDRESSES;
<INITIAL>:subject	return SUBJECT;
<INITIAL>:from		return FROM;
<INITIAL>:handle	return HANDLE;
<INITIAL>:mime		return MIME;
<INITIAL>:comparator	return COMPARATOR;
<INITIAL>:is		return IS;
<INITIAL>:contains	return CONTAINS;
<INITIAL>:matches	return MATCHES;
<INITIAL>:regex		return REGEX;
<INITIAL>:count		return COUNT;
<INITIAL>:value		return VALUE;
<INITIAL>:over		return OVER;
<INITIAL>:under		return UNDER;
<INITIAL>:all		return ALL;
<INITIAL>:localpart	return LOCALPART;
<INITIAL>:domain	return DOMAIN;
<INITIAL>:user		return USER;
<INITIAL>:detail	return DETAIL;
<INITIAL>:raw		return RAW;
<INITIAL>:text		return TEXT;
<INITIAL>:content	return CONTENT;
<INITIAL>include	return INCLUDE;
<INITIAL>:personal	return PERSONAL;
<INITIAL>:global	return GLOBAL;
<INITIAL>return		return RETURN;
<INITIAL>:copy		return COPY;
<INITIAL>[ \t\n\r] ;	/* ignore whitespace */
<INITIAL>#.* ;		/* ignore hash comments */
<INITIAL>"/*"([^\*]|\*[^\/])*\*?"*/" ;	/* ignore bracket comments */
.			return yytext[0];

%%
/*  */
static int tonum(char *c)
{
  int val = atoi(c);
  switch (c[strlen(c)-1]) {
  case 'K': case 'k': val *= (1 << 10); break;
  case 'M': case 'm': val *= (1 << 20); break;
  case 'G': case 'g': val *= (1 << 30); break;
  default: break;
  }
  return val;
}

/* convert NULL strings to "" */
static char *chkstr(char *str)
{
    if (!str) return xstrdup("");
    else return str;
}
