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/* candump_scanner.l
*
* Wiretap Library
* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
*
* Support for candump log file format
* Copyright (c) 2019 by Maksim Salau <maksim.salau@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
%option reentrant
%option noyywrap
%option noinput
%option nounput
%option batch
%option never-interactive
%option prefix="candump_"
%option extra-type="candump_state_t *"
%option yylineno
%option nodefault
%option noyy_scan_buffer
%option noyy_scan_bytes
%option noyy_scan_string
/*
* We have to override the memory allocators so that we don't get
* "unused argument" warnings from the yyscanner argument (which
* we don't use, as we have a global memory allocator).
*
* We provide, as macros, our own versions of the routines generated by Flex,
* which just call malloc()/realloc()/free() (as the Flex versions do),
* discarding the extra argument.
*/
%option noyyalloc
%option noyyrealloc
%option noyyfree
%{
#include <ws_diag_control.h>
#include <wiretap/file_wrappers.h>
#include "candump_parser.h"
#include "candump_priv.h"
#ifndef HAVE_UNISTD_H
#define YY_NO_UNISTD_H
#endif
static int candump_yyinput(void *buf, candump_state_t *state)
{
int c = file_getc(state->fh);
if (c == EOF)
{
state->err = file_error(state->fh, &state->err_info);
return YY_NULL;
}
*(char *)buf = c;
return 1;
}
#define YY_INPUT(buf, result, max_size) \
do { (result) = candump_yyinput((buf), yyextra); } while (0)
/* Count bytes read. This is required in order to rewind the file
* to the beginning of the next packet, since flex reads more bytes
* before executing the action that does yyterminate(). */
#define YY_USER_ACTION do { yyextra->file_bytes_read += yyleng; } while (0);
/*
* Sleazy hack to suppress compiler warnings in yy_fatal_error().
*/
#define YY_EXIT_FAILURE ((void)yyscanner, 2)
/*
* Macros for the allocators, to discard the extra argument.
*/
#define candump_alloc(size, yyscanner) (void *)malloc(size)
#define candump_realloc(ptr, size, yyscanner) (void *)realloc((char *)(ptr), (size))
#define candump_free(ptr, yyscanner) free((char *)(ptr))
DIAG_OFF_FLEX
%}
INT [0-9]
HEX [0-9A-Fa-f]
%%
[ \t] { return TOKEN_SPACE; };
[\r\n][ \t\r\n]* { yyterminate(); }
\({INT}+\.{INT}+\) {
yyextra->token.v0 = strtoul(yytext + 1, NULL, 10);
yyextra->token.v1 = strtoul(strchr(yytext, '.') + 1, NULL, 10);
return TOKEN_TIMESTAMP;
}
R{INT} {
yyextra->token.v0 = strtoul(yytext + 1, NULL, 10);
return TOKEN_RTR;
}
R {
yyextra->token.v0 = 0;
return TOKEN_RTR;
}
{HEX}{8}# {
yyextra->token.v0 = strtoul(yytext, NULL, 16);
return TOKEN_EXT_ID;
}
{HEX}{3}# {
yyextra->token.v0 = strtoul(yytext, NULL, 16);
return TOKEN_STD_ID;
}
{HEX}{HEX} {
yyextra->token.v0 = strtoul(yytext, NULL, 16);
return TOKEN_BYTE;
}
#{HEX} {
yyextra->token.v0 = strtoul(yytext + 1, NULL, 16);
return TOKEN_FLAGS;
}
. { return TOKEN_UNKNOWN; }
%%
DIAG_ON_FLEX
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