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