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104 lines
3.1 KiB
Plaintext
104 lines
3.1 KiB
Plaintext
/*
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* Command format string lexer for CLI backend.
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*
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* --
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* Copyright (C) 2015 Cumulus Networks, Inc.
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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%top{
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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}
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%{
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/* ignore flex generated code in static analyzer */
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#ifndef __clang_analyzer__
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/* ignore harmless bugs in old versions of flex */
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#pragma GCC diagnostic ignored "-Wsign-compare"
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#pragma GCC diagnostic ignored "-Wmissing-prototypes"
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#include "command_parse.h"
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#define YY_USER_ACTION yylloc->last_column += yyleng;
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#define LOC_STEP do { if (yylloc) { \
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yylloc->first_column = yylloc->last_column; \
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yylloc->first_line = yylloc->last_line; \
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} } while(0)
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%}
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IPV4 A\.B\.C\.D
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IPV4_PREFIX A\.B\.C\.D\/M
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IPV6 X:X::X:X
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IPV6_PREFIX X:X::X:X\/M
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MAC X:X:X:X:X:X
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MAC_PREFIX X:X:X:X:X:X\/M
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VARIABLE [A-Z][-_A-Z:0-9]+
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WORD (\-|\+)?[a-zA-Z0-9\*][-+_a-zA-Z0-9\*]*
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NUMBER (\-|\+)?[0-9]{1,20}
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RANGE \({NUMBER}[ ]?\-[ ]?{NUMBER}\)
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/* yytext shall be a pointer */
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%pointer
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%option noyywrap
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%option nounput
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%option noinput
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%option outfile="lib/command_lex.c"
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%option header-file="lib/command_lex.h"
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%option prefix="cmd_yy"
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%option reentrant
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%option bison-bridge
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%option bison-locations
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%%
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%{
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LOC_STEP;
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%}
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[ \t]+ LOC_STEP /* ignore whitespace */;
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{IPV4} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV4;}
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{IPV4_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV4_PREFIX;}
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{IPV6} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV6;}
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{IPV6_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return IPV6_PREFIX;}
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{MAC} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return MAC;}
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{MAC_PREFIX} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return MAC_PREFIX;}
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{VARIABLE} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return VARIABLE;}
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{WORD} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return WORD;}
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{RANGE} {yylval->string = XSTRDUP(MTYPE_LEX, yytext); return RANGE;}
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. {return yytext[0];}
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%%
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static YY_BUFFER_STATE buffer;
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void set_lexer_string (yyscan_t *scn, const char *string)
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{
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*scn = NULL;
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yylex_init(scn);
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buffer = yy_scan_string (string, *scn);
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}
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void cleanup_lexer (yyscan_t *scn)
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{
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// yy_delete_buffer (buffer, *scn);
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yylex_destroy(*scn);
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}
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#endif /* __clang_analyzer__ */
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