5428e8ddbe
There's no guarantee that there will be two digits after PRI-XMIT or PRI-RCV; the capture file in bug 3535, for exmaple, has "PRI-XMIT-0/1" and "PRI-RCV-0". Require a minimum of 1, not 2, non-{/(:} characters. Leave the maximum of 20 in place. Change-Id: Ie8f8f4ff5eb04baf0ee61bf28015e59a1fa43948 Reviewed-on: https://code.wireshark.org/review/29947 Reviewed-by: Guy Harris <guy@alum.mit.edu>
402 lines
8.3 KiB
Text
402 lines
8.3 KiB
Text
%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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}
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/*
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* We want a reentrant scanner.
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*/
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%option reentrant
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/*
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* We want to generate code that can be used by a reentrant parser
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* generated by Bison or Berkeley YACC.
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*/
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%option bison-bridge
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/*
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* We don't read interactively from the terminal.
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*/
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%option never-interactive
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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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*/
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%option noyywrap
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/*
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* The type for the state we keep for the scanner (and parser).
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*/
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%option extra-type="ascend_state_t *"
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/*
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* Prefix scanner routines with "ascend" 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="ascend"
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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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/* ascend_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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "wtap-int.h"
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#include "ascendtext.h"
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#include "ascend-int.h"
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#include "ascend.h"
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#include "file_wrappers.h"
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/*
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* Disable diagnostics in the code generated by Flex.
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*/
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DIAG_OFF_FLEX
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#define YY_INPUT(buf,result,max_size) { \
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ascend_state_t *parser_state = ascendget_extra(yyscanner); \
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int c = file_getc(parser_state->fh); \
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if (c == EOF) { \
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parser_state->err = file_error(parser_state->fh, \
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&parser_state->err_info); \
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if (parser_state->err == 0) \
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parser_state->err = WTAP_ERR_SHORT_READ; \
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result = YY_NULL; \
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} else { \
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buf[0] = c; \
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result = 1; \
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} \
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}
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#define NO_USER "<none>"
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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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/*
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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 ascendalloc(size, yyscanner) (void *)malloc(size)
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#define ascendrealloc(ptr, size, yyscanner) (void *)realloc((char *)(ptr), (size))
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#define ascendfree(ptr, yyscanner) free((char *)ptr)
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%}
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D [0-9]
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H [A-Fa-f0-9]
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PPP_XPFX PPP-OUT
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PPP_RPFX PPP-IN
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ISDN_XPFX PRI-XMIT-
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ISDN_RPFX PRI-RCV-
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WAN_XPFX XMIT[\-:]*
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WAN_RPFX RECV[\-:]*
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ETHER_PFX ETHER
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WDD_DATE "Date:"
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WDD_TIME "Time:"
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WDD_CAUSE "Cause an attempt to place call to "
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WDD_CALLNUM [^\n\r\t ]+
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WDD_CHUNK "WD_DIALOUT_DISP: chunk"
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WDD_TYPE "type "[^\n\r\t ]+
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%s sc_gen_task
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%s sc_gen_time_s
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%s sc_gen_time_u
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%s sc_gen_octets
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%s sc_gen_counter
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%s sc_gen_byte
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%s sc_wds_user
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%s sc_wds_sess
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%s sc_wdd_date_d
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%s sc_wdd_date_m
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%s sc_wdd_date_y
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%s sc_wdd_time
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%s sc_wdd_time_h
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%s sc_wdd_time_m
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%s sc_wdd_time_s
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%s sc_wdd_cause
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%s sc_wdd_callnum
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%s sc_wdd_chunk
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%s sc_wdd_chunknum
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%s sc_wdd_type
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%s sc_chardisp
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%s sc_isdn_call
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%s sc_ether_direction
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%%
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<INITIAL,sc_gen_byte>{ETHER_PFX} {
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BEGIN(sc_ether_direction);
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yylval->d = ASCEND_PFX_ETHER;
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return ETHER_PREFIX;
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}
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<INITIAL,sc_gen_byte>{ISDN_XPFX} {
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BEGIN(sc_isdn_call);
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yylval->d = ASCEND_PFX_ISDN_X;
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return ISDN_PREFIX;
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}
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<INITIAL,sc_gen_byte>{ISDN_RPFX} {
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BEGIN(sc_isdn_call);
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yylval->d = ASCEND_PFX_ISDN_R;
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return ISDN_PREFIX;
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}
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<INITIAL,sc_gen_byte>{WAN_XPFX} {
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BEGIN(sc_wds_user);
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yylval->d = ASCEND_PFX_WDS_X;
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return WDS_PREFIX;
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}
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<INITIAL,sc_gen_byte>{WAN_RPFX} {
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BEGIN(sc_wds_user);
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yylval->d = ASCEND_PFX_WDS_R;
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return WDS_PREFIX;
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}
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<INITIAL,sc_gen_byte>{PPP_XPFX} {
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BEGIN(sc_wds_user);
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yylval->d = ASCEND_PFX_WDS_X;
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return WDS_PREFIX;
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}
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<INITIAL,sc_gen_byte>{PPP_RPFX} {
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BEGIN(sc_wds_user);
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yylval->d = ASCEND_PFX_WDS_R;
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return WDS_PREFIX;
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}
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/*
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* If we allow an arbitrary non-zero number of non-left-parentheses after
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* "ETHER", that means that some file that has ETHER followed by a lot of
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* text (see, for example, tpncp/tpncp.dat in the source tree) can cause
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* either an infinite loop or a loop that take forever to finish, as the
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* scanner keeps swallowing characters. Limit it to 20 characters.
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*
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* XXX - any reason to require at least two of them?
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*/
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<sc_ether_direction>[^\(]{2,20} {
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BEGIN(sc_gen_task);
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return STRING;
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}
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/*
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* If we allow an arbitrary non-zero number of non-slash, non-left-parentheses,
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* non-colon characters after "PRI-XMIT", that means that some file that has
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* PRI-XMIT= followed by a lot of text can cause either an infinite loop or
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* a loop that take forever to finish, as the scanner keeps swallowing
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* characters. Limit it to 20 characters.
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*/
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<sc_isdn_call>[^\/\(:]{1,20} {
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BEGIN(sc_gen_task);
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return DECNUM;
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}
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<sc_wds_user>[^:]{2,20} {
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char *atcopy = g_strdup(yytext);
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char colon = input(yyscanner);
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char after = input(yyscanner);
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int retval = STRING;
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unput(after); unput(colon);
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if (after != '(' && after != ' ') {
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BEGIN(sc_wds_sess);
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if (yyextra->pseudo_header != NULL) {
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g_strlcpy(yyextra->pseudo_header->user, atcopy, ASCEND_MAX_STR_LEN);
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}
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} else { /* We have a version 7 file */
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BEGIN(sc_gen_task);
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if (yyextra->pseudo_header != NULL) {
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g_strlcpy(yyextra->pseudo_header->user, NO_USER, ASCEND_MAX_STR_LEN);
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}
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/* Are valid values ever > 2^32? If so we need to adjust YYSTYPE and a lot of */
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/* upstream code accordingly. */
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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retval = DECNUM;
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}
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g_free (atcopy);
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return retval;
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}
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<sc_wds_sess>{D}* {
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BEGIN(sc_gen_task);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_gen_task>(0x|0X)?{H}{2,8} {
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BEGIN(sc_gen_time_s);
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yylval->d = (guint32) strtoul(yytext, NULL, 16);
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return HEXNUM;
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}
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<sc_gen_task>\"[A-Za-z0-9_ ]+\" {
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return STRING;
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}
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<sc_gen_time_s>{D}{1,10} {
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BEGIN(sc_gen_time_u);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_gen_time_u>{D}{1,6} {
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char *atcopy = g_strdup(yytext);
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BEGIN(sc_gen_octets);
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/* only want the most significant 2 digits. convert to usecs */
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if (strlen(atcopy) > 2)
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atcopy[2] = '\0';
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yylval->d = (guint32) strtoul(atcopy, NULL, 10) * 10000;
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g_free(atcopy);
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return DECNUM;
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}
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<sc_gen_octets>{D}{1,10} {
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BEGIN(sc_gen_counter);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_gen_counter,sc_gen_byte>"["{H}{4}"]:" {
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BEGIN(sc_gen_byte);
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return COUNTER;
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}
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<sc_gen_byte>{H}{2} {
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yylval->b = (guint8)(guint32) strtoul(yytext, NULL, 16);
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return HEXBYTE;
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}
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<sc_gen_byte>" "{4} {
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BEGIN(sc_chardisp);
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}
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<sc_chardisp>.* {
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BEGIN(sc_gen_byte);
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}
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<INITIAL,sc_gen_byte>{WDD_DATE} {
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BEGIN(sc_wdd_date_d);
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return WDD_DATE;
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}
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<sc_wdd_date_d>{D}{2} {
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BEGIN(sc_wdd_date_m);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_wdd_date_m>{D}{2} {
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BEGIN(sc_wdd_date_y);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_wdd_date_y>{D}{4} {
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BEGIN(sc_wdd_time);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_wdd_time>{WDD_TIME} {
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BEGIN(sc_wdd_time_h);
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return KEYWORD;
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}
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<sc_wdd_time_h>{D}{2} {
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BEGIN(sc_wdd_time_m);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_wdd_time_m>{D}{2} {
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BEGIN(sc_wdd_time_s);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_wdd_time_s>{D}{2} {
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BEGIN(sc_wdd_cause);
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yylval->d = (guint32) strtoul(yytext, NULL, 10);
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return DECNUM;
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}
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<sc_wdd_cause>{WDD_CAUSE} {
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BEGIN(sc_wdd_callnum);
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return KEYWORD;
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}
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<sc_wdd_callnum>{WDD_CALLNUM} {
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BEGIN(sc_wdd_chunk);
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if (yyextra->pseudo_header != NULL) {
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g_strlcpy(yyextra->pseudo_header->call_num, yytext, ASCEND_MAX_STR_LEN);
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}
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return STRING;
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}
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<INITIAL,sc_wdd_chunk,sc_gen_byte>{WDD_CHUNK} {
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BEGIN(sc_wdd_chunknum);
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return WDD_CHUNK;
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}
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<sc_wdd_chunknum>{H}{1,8} {
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BEGIN(sc_wdd_type);
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yylval->d = (guint32) strtoul(yytext, NULL, 16);
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return HEXNUM;
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}
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<sc_wdd_type>{WDD_TYPE} {
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BEGIN(sc_gen_task);
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return KEYWORD;
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}
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<sc_gen_task>\/{D}+ {
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return SLASH_SUFFIX;
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}
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(0x|0X)?{H}+ { return HEXNUM; }
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task:|task|at|time:|octets { return KEYWORD; }
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<<EOF>> { yyterminate(); }
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(.|\n) ;
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%%
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/*
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* Turn diagnostics back on, so we check the code that we've written.
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*/
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DIAG_ON_FLEX
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