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wireshark/epan/uat_load.l

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/*
* We don't use unput, so don't generate code for it.
*/
%option nounput
/*
* We don't read from the terminal.
*/
%option never-interactive
/*
* Prefix scanner routines with "uat_load_" rather than "yy", so this scanner
* can coexist with other scanners.
*/
%option prefix="uat_load_"
%{
/*
* uat_load.l
*
* $Id$
*
* User Accessible Tables
* Mantain an array of user accessible data strucures
* One parser to fit them all
*
* (c) 2007, Luis E. Garcia Ontanon <luis@ontanon.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 2001 Gerald Combs
*
* 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 2
* of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <glib.h>
#include <epan/emem.h>
#include "uat-int.h"
#include "uat_load_lex.h"
#include <wsutil/file_util.h>
#ifdef _WIN32
/* disable Windows VC compiler warning "signed/unsigned mismatch" associated */
/* with YY_INPUT code generated by flex versions such as 2.5.35. */
#pragma warning (disable:4018)
#endif
static uat_t* uat;
static guint colnum;
static gchar* ptr;
static guint len;
static gchar* error;
static void* record;
static guint linenum;
static gchar *parse_str;
static guint parse_str_pos;
#define ERROR(fmtd) do { error = ep_strdup_printf("%s:%d: %s",uat->filename,linenum,ep_strdup_printf fmtd); yyterminate(); } while(0)
#define SET_FIELD() \
{ const gchar* err; \
if (uat->fields[colnum].cb.chk) { \
if ( ! uat->fields[colnum].cb.chk(record, ptr, len, uat->fields[colnum].cbdata.chk, uat->fields[colnum].fld_data, &err) ) { \
ERROR(("%s",err)); \
}\
}\
uat->fields[colnum].cb.set(record, ptr, len, uat->fields[colnum].cbdata.chk, uat->fields[colnum].fld_data);\
g_free(ptr);\
colnum++; \
} while(0)
#ifdef DEBUG_UAT_LOAD
#define DUMP_FIELD(str) \
{ 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); }
#define DUMP(str) printf("%s\n",str)
#else
#define DUMP_FIELD(s)
#define DUMP(s)
#endif
/* Modified version of YY_INPUT generated by Flex 2.91 */
#define YY_INPUT(buf,result,max_size) \
if ( parse_str ) \
{ \
int n = 0; \
guint pslen = strlen(parse_str); \
if (parse_str_pos < pslen) \
{ \
n = pslen - parse_str_pos; \
if (n > max_size) n = max_size; \
memcpy(buf, parse_str + parse_str_pos, n); \
parse_str_pos += n; \
} \
result = n; \
} \
else \
{ \
errno=0; \
while ( (result = fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) \
{ \
if( errno != EINTR) \
{ \
YY_FATAL_ERROR( "input in flex scanner failed" ); \
break; \
} \
errno=0; \
clearerr(yyin); \
} \
}
/*
* XXX
* quoted_string below fails badly on "...\\"
* workarround in uat_save(), using /x5c and /x22
*/
%}
quoted_string \042([^\042]|\134\042)*\042
binstring ([0-9a-zA-Z][0-9a-zA-Z])*
separator [ \t]*,
newline [ \t]*[\r]?\n
ws [ \t]+
comment #[^\n]*\n
%x START_OF_LINE NEXT_FIELD SEPARATOR END_OF_RECORD ERRORED
%%
<START_OF_LINE,NEXT_FIELD>{ws} ;
<START_OF_LINE>{newline} linenum++;
<START_OF_LINE>{comment} linenum++;
<START_OF_LINE,NEXT_FIELD>{separator} {
ptr = g_strdup("");
len = 0;
DUMP_FIELD("empty->next");
SET_FIELD();
if ( colnum >= uat->ncols ) {
ERROR(("more fields than required"));
}
BEGIN NEXT_FIELD;
}
<START_OF_LINE,NEXT_FIELD>{newline} {
ptr = "";
len = 0;
BEGIN END_OF_RECORD;
yyless(yyleng);
}
<START_OF_LINE,NEXT_FIELD>{quoted_string} {
ptr = uat_undquote(yytext,yyleng,&len);
if (colnum < uat->ncols - 1) {
DUMP("quoted_str->s");
BEGIN SEPARATOR;
} else {
DUMP("quoted_str->eor");
BEGIN END_OF_RECORD;
}
}
<START_OF_LINE,NEXT_FIELD>{binstring} {
ptr = uat_unbinstring(yytext,yyleng,&len);
if (!ptr) {
ERROR(("uneven hexstring for field %s",uat->fields[colnum].name));
}
if ( colnum < uat->ncols - 1 ) {
DUMP("binstring->s");
BEGIN SEPARATOR;
} else {
DUMP("binstring->eor");
BEGIN END_OF_RECORD;
}
}
<SEPARATOR>{separator} {
DUMP_FIELD("separator->next");
SET_FIELD();
if ( colnum >= uat->ncols ) {
ERROR(("more fields than required"));
}
BEGIN NEXT_FIELD;
}
<SEPARATOR>{newline} {
linenum++;
ERROR(("expecting field %s in previous line",uat->fields[colnum].name));
}
<SEPARATOR>. {
ERROR(("unexpected char '%s' while looking for field %s",yytext,uat->fields[colnum].name));
}
<END_OF_RECORD>{separator} {
ERROR(("more fields than required"));
}
<END_OF_RECORD>{newline} {
void* rec;
const gchar* err = NULL;
linenum++;
DUMP_FIELD("newline->start");
SET_FIELD();
rec = uat_add_record(uat, record);
if (uat->update_cb)
uat->update_cb(rec,&err);
if (err) {
ERROR(("%s",err));
}
colnum = 0;;
ptr = NULL;
len = 0;
memset(record,0,uat->record_size);
BEGIN START_OF_LINE;
}
<END_OF_RECORD>. {
ERROR(("unexpected char while looking for end of line"));
}
<ERRORED>{newline} { linenum++; BEGIN START_OF_LINE; }
<ERRORED>. ;
{newline} { linenum++; ERROR(("incomplete record")); BEGIN START_OF_LINE; }
. { ERROR(("unexpected input")); }
%%
gboolean uat_load(uat_t* uat_in, char** err) {
gchar* fname = uat_get_actual_filename(uat_in, FALSE);
uat = uat_in;
parse_str = NULL;
if (!fname) {
UAT_UPDATE(uat);
return TRUE;
}
if (!(yyin = ws_fopen(fname,"r"))) {
*err = g_strerror(errno);
g_free(fname);
return FALSE;
}
error = NULL;
colnum = 0;
record = g_malloc0(uat->record_size);
linenum = 1;
BEGIN START_OF_LINE;
DUMP(fname);
g_free(fname); /* we're done with the file name now */
yylex();
fclose(yyin);
yyrestart(NULL);
uat->changed = FALSE;
uat->loaded = TRUE;
UAT_UPDATE(uat);
if (error) {
*err = ep_strdup(error);
return FALSE;
}
if (uat->post_update_cb)
uat->post_update_cb();
*err = NULL;
return TRUE;
}
gboolean uat_load_str(uat_t* uat_in, char* entry, char** err) {
uat = uat_in;
parse_str = g_strdup_printf("%s\n", entry); /* Records must end with a newline */
parse_str_pos = 0;
yyin = NULL;
error = NULL;
colnum = 0;
record = g_malloc0(uat->record_size);
linenum = 1;
BEGIN START_OF_LINE;
DUMP(entry);
yylex();
yyrestart(NULL);
g_free(parse_str);
parse_str = NULL;
uat->changed = TRUE;
uat->loaded = TRUE;
UAT_UPDATE(uat);
if (error) {
*err = ep_strdup(error);
return FALSE;
}
if (uat->post_update_cb)
uat->post_update_cb();
*err = NULL;
return TRUE;
}
/*
* We want to stop processing when we get to the end of the input.
* (%option noyywrap is not used because if used then
* some flex versions (eg: 2.5.35) generate code which causes
* warnings by the Windows VC compiler).
*/
int yywrap(void) {
return 1;
}
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