forked from osmocom/wireshark
4f6e546d4d
svn path=/trunk/; revision=34010
370 lines
7.4 KiB
Text
370 lines
7.4 KiB
Text
/*
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* We don't use unput, so don't generate code for it.
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*/
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%option nounput
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/*
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* We don't read from the terminal.
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*/
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%option never-interactive
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/*
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* Prefix scanner routines with "uat_load_" rather than "yy", so this scanner
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* can coexist with other scanners.
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*/
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%option prefix="uat_load_"
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%{
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/*
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* uat_load.l
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*
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* $Id$
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*
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* User Accessible Tables
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* Mantain an array of user accessible data strucures
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* One parser to fit them all
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*
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* (c) 2007, Luis E. Garcia Ontanon <luis@ontanon.org>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2001 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include <glib.h>
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#include <epan/emem.h>
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#include "uat-int.h"
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#include "uat_load_lex.h"
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#include <wsutil/file_util.h>
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#ifdef _WIN32
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/* disable Windows VC compiler warning "signed/unsigned mismatch" associated */
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/* with YY_INPUT code generated by flex versions such as 2.5.35. */
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#pragma warning (disable:4018)
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#endif
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static uat_t* uat;
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static guint colnum;
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static gchar* ptr;
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static guint len;
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static gchar* error;
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static void* record;
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static guint linenum;
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static gchar *parse_str;
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static guint parse_str_pos;
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#define ERROR(fmtd) do { error = ep_strdup_printf("%s:%d: %s",uat->filename,linenum,ep_strdup_printf fmtd); yyterminate(); } while(0)
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#define SET_FIELD() \
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{ const gchar* err; \
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if (uat->fields[colnum].cb.chk) { \
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if ( ! uat->fields[colnum].cb.chk(record, ptr, len, uat->fields[colnum].cbdata.chk, uat->fields[colnum].fld_data, &err) ) { \
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ERROR(("%s",err)); \
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}\
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}\
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uat->fields[colnum].cb.set(record, ptr, len, uat->fields[colnum].cbdata.chk, uat->fields[colnum].fld_data);\
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g_free(ptr);\
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colnum++; \
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} while(0)
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#ifdef DEBUG_UAT_LOAD
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#define DUMP_FIELD(str) \
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{ guint i; printf("%s: %s='",str,uat->fields[colnum].name); for(i=0;i<len;i++) if (uat->fields[colnum].mode == PT_TXTMOD_HEXBYTES) { printf("%.2x ",((guint8*)ptr)[i]); } else putc(ptr[i],stdout); printf("'[%d]\n",len); }
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#define DUMP(str) printf("%s\n",str)
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#else
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#define DUMP_FIELD(s)
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#define DUMP(s)
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#endif
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/* Modified version of YY_INPUT generated by Flex 2.91 */
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#define YY_INPUT(buf,result,max_size) \
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if ( parse_str ) \
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{ \
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int n = 0; \
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guint pslen = strlen(parse_str); \
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if (parse_str_pos < pslen) \
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{ \
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n = pslen - parse_str_pos; \
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if (n > max_size) n = max_size; \
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memcpy(buf, parse_str + parse_str_pos, n); \
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parse_str_pos += n; \
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} \
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result = n; \
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} \
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else \
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{ \
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errno=0; \
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while ( (result = fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) \
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{ \
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if( errno != EINTR) \
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{ \
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YY_FATAL_ERROR( "input in flex scanner failed" ); \
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break; \
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} \
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errno=0; \
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clearerr(yyin); \
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} \
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}
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/*
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* XXX
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* quoted_string below fails badly on "...\\"
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* workarround in uat_save(), using /x5c and /x22
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*/
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%}
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quoted_string \042([^\042]|\134\042)*\042
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binstring ([0-9a-zA-Z][0-9a-zA-Z])*
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separator [ \t]*,
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newline [ \t]*[\r]?\n
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ws [ \t]+
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comment #[^\n]*\n
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%x START_OF_LINE NEXT_FIELD SEPARATOR END_OF_RECORD ERRORED
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%%
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<START_OF_LINE,NEXT_FIELD>{ws} ;
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<START_OF_LINE>{newline} linenum++;
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<START_OF_LINE>{comment} linenum++;
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<START_OF_LINE,NEXT_FIELD>{separator} {
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ptr = g_strdup("");
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len = 0;
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DUMP_FIELD("empty->next");
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SET_FIELD();
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if ( colnum >= uat->ncols ) {
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ERROR(("more fields than required"));
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}
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BEGIN NEXT_FIELD;
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}
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<START_OF_LINE,NEXT_FIELD>{newline} {
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ptr = "";
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len = 0;
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BEGIN END_OF_RECORD;
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yyless(yyleng);
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}
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<START_OF_LINE,NEXT_FIELD>{quoted_string} {
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ptr = uat_undquote(yytext,yyleng,&len);
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if (colnum < uat->ncols - 1) {
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DUMP("quoted_str->s");
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BEGIN SEPARATOR;
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} else {
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DUMP("quoted_str->eor");
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BEGIN END_OF_RECORD;
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}
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}
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<START_OF_LINE,NEXT_FIELD>{binstring} {
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ptr = uat_unbinstring(yytext,yyleng,&len);
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if (!ptr) {
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ERROR(("uneven hexstring for field %s",uat->fields[colnum].name));
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}
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if ( colnum < uat->ncols - 1 ) {
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DUMP("binstring->s");
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BEGIN SEPARATOR;
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} else {
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DUMP("binstring->eor");
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BEGIN END_OF_RECORD;
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}
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}
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<SEPARATOR>{separator} {
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DUMP_FIELD("separator->next");
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SET_FIELD();
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if ( colnum >= uat->ncols ) {
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ERROR(("more fields than required"));
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}
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BEGIN NEXT_FIELD;
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}
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<SEPARATOR>{newline} {
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linenum++;
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ERROR(("expecting field %s in previous line",uat->fields[colnum].name));
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BEGIN START_OF_LINE;
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}
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<SEPARATOR>. {
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ERROR(("unexpected char '%s' while looking for field %s",yytext,uat->fields[colnum].name));
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BEGIN ERRORED;
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}
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<END_OF_RECORD>{separator} {
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ERROR(("more fields than required"));
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BEGIN ERRORED;
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}
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<END_OF_RECORD>{newline} {
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void* rec;
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const gchar* err = NULL;
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linenum++;
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DUMP_FIELD("newline->start");
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SET_FIELD();
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rec = uat_add_record(uat, record);
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if (uat->update_cb)
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uat->update_cb(rec,&err);
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if (err) {
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ERROR(("%s",err));
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}
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colnum = 0;;
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ptr = NULL;
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len = 0;
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memset(record,0,uat->record_size);
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BEGIN START_OF_LINE;
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}
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<END_OF_RECORD>. {
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ERROR(("unexpected char while looking for end of line"));
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BEGIN ERRORED;
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}
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<ERRORED>{newline} { linenum++; BEGIN START_OF_LINE; }
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<ERRORED>. ;
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{newline} { linenum++; ERROR(("incomplete record")); BEGIN START_OF_LINE; }
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. { ERROR(("unexpected input")); }
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%%
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gboolean uat_load(uat_t* uat_in, char** err) {
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gchar* fname = uat_get_actual_filename(uat_in, FALSE);
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uat = uat_in;
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parse_str = NULL;
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if (!fname) {
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UAT_UPDATE(uat);
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return TRUE;
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}
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if (!(yyin = ws_fopen(fname,"r"))) {
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*err = strerror(errno);
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g_free(fname);
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return FALSE;
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}
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error = NULL;
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colnum = 0;
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record = g_malloc0(uat->record_size);
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linenum = 1;
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BEGIN START_OF_LINE;
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DUMP(fname);
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g_free(fname); /* we're done with the file name now */
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yylex();
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yyrestart(NULL);
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uat->changed = FALSE;
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uat->loaded = TRUE;
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UAT_UPDATE(uat);
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if (error) {
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*err = ep_strdup(error);
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return FALSE;
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}
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if (uat->post_update_cb)
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uat->post_update_cb();
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*err = NULL;
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return TRUE;
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}
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gboolean uat_load_str(uat_t* uat_in, char* entry, char** err) {
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uat = uat_in;
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parse_str = g_strdup_printf("%s\n", entry); /* Records must end with a newline */
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parse_str_pos = 0;
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yyin = NULL;
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error = NULL;
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colnum = 0;
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record = g_malloc0(uat->record_size);
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linenum = 1;
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BEGIN START_OF_LINE;
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DUMP(entry);
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yylex();
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yyrestart(NULL);
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g_free(parse_str);
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parse_str = NULL;
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uat->changed = TRUE;
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uat->loaded = TRUE;
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UAT_UPDATE(uat);
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if (error) {
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*err = ep_strdup(error);
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return FALSE;
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}
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if (uat->post_update_cb)
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uat->post_update_cb();
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*err = NULL;
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return TRUE;
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}
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/*
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* We want to stop processing when we get to the end of the input.
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* (%option noyywrap is not used because if used then
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* some flex versions (eg: 2.5.35) generate code which causes
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* warnings by the Windows VC compiler).
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*/
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int yywrap(void) {
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return 1;
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}
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