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Ian Campbell
cf38606aad
Fixup whitespace alignment while I'm there. Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
104 lines
3.1 KiB
Plaintext
104 lines
3.1 KiB
Plaintext
/* -*- fundamental -*- */
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/*
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* libxlu_cfg_l.l - xl configuration file parsing: lexer
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*
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* Copyright (C) 2010 Citrix Ltd.
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* Author Ian Jackson <ian.jackson@eu.citrix.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; version 2.1 only. with the special
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* exception on linking described in file LICENSE.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*/
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%{
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#include "libxlu_cfg_i.h"
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#define ctx ((CfgParseContext*)yyextra)
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#define YY_NO_INPUT
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#define GOT(x) do{ \
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yylloc->first_line= yylineno; \
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return (x); \
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}while(0)
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/* Some versions of flex have a bug (Fedora bugzilla 612465) which causes
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* it to fail to declare these functions, which it defines. So declare
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* them ourselves. Hopefully we won't have to simultaneously support
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* a flex version which declares these differently somehow. */
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int xlu__cfg_yyget_column(yyscan_t yyscanner);
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void xlu__cfg_yyset_column(int column_no, yyscan_t yyscanner);
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%}
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%option warn
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%option nodefault
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%option batch
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%option 8bit
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%option yylineno
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%option noyywrap
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%option bison-bridge
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%option bison-locations
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%option reentrant
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%option prefix="xlu__cfg_yy"
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%option nounput
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%x lexerr
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%%
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[a-z][._0-9a-z]* {
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yylval->string= xlu__cfgl_strdup(ctx,yytext);
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GOT(IDENT);
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}
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[0-9][0-9a-fx]* {
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yylval->string= xlu__cfgl_strdup(ctx,yytext);
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GOT(NUMBER);
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}
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[ \t]
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, { GOT(','); }
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\[ { GOT('['); }
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\] { GOT(']'); }
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\= { GOT('='); }
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\; { GOT(';'); }
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\n|\#.*\n { yylloc->first_line= yylineno-1; return NEWLINE; }
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\'([^\'\\\n]|\\.)*\' {
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yylval->string= xlu__cfgl_dequote(ctx,yytext);
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GOT(STRING);
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}
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\"([^\"\\\n]|\\.)*\" {
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yylval->string= xlu__cfgl_dequote(ctx,yytext);
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GOT(STRING);
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}
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[+-.():] {
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ctx->likely_python= 1;
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BEGIN(lexerr);
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yymore();
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}
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. {
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BEGIN(lexerr);
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yymore();
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}
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<lexerr>[^ \t\n]*|[ \t] {
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xlu__cfgl_lexicalerror(ctx,"lexical error");
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BEGIN(0);
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}
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<lexerr>\n {
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xlu__cfgl_lexicalerror(ctx,"lexical error");
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BEGIN(0);
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GOT(NEWLINE);
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}
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