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/* libguestfs virt-builder tool -*- fundamental -*-
* Copyright (C) 2013 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
%{
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "index-struct.h"
#include "index-parse.h"
#define YY_EXTRA_TYPE struct parse_context *
#define YY_USER_ACTION yylloc->first_line = yylloc->last_line = yylineno;
%}
%option nounput
%option noyywrap
%option yylineno
%option reentrant
%option bison-bridge
%option bison-locations
%%
/* Apart from the PGP prologue/epilogue which is a hack, the
* scanning strategy is to deal with the file strictly line by
* line, and pass those lines up to the parser which deals with
* whether they appear in the right order to be meaningful.
* Note that flex does longest-match.
*/
/* Ignore comments - '#' MUST appear at the start of a line. */
^"#".*\n { yyextra->seen_comments++; }
/* An empty line is significant. */
^\n { return EMPTY_LINE; }
/* [...] marks beginning of a section. */
^"["[-A-Za-z0-9._]+"]"\n {
yylval->str = strndup (yytext+1, yyleng-3);
return SECTION_HEADER;
}
/* field=value or field[subfield]=value */
^[A-Za-z0-9_.]+("["[A-Za-z0-9_,.]+"]")?"=".*\n {
size_t i = strcspn (yytext, "=[");
yylval->field = malloc (sizeof (struct field));
yylval->field->next = NULL;
yylval->field->key = strndup (yytext, i);
if (yytext[i] == '[') {
size_t j = strcspn (yytext+i+1, "]");
yylval->field->subkey = strndup (yytext+i+1, j);
i += 1+j+1;
} else {
yylval->field->subkey = NULL;
}
/* Note we chop the final \n off here. */
yylval->field->value = strndup (yytext+i+1, yyleng-(i+2));
return FIELD;
}
/* Continuation line for multi-line values. */
^[[:blank:]].*\n {
yylval->str = strndup (yytext+1, yyleng-2);
return VALUE_CONT;
}
/* Hack to eat the PGP prologue. */
^"-----BEGIN PGP SIGNED MESSAGE-----\n" {
int c, prevnl = 0;
/* Eat everything to the first blank line. */
while ((c = input (yyscanner)) != EOF) {
if (c == '\n' && prevnl)
break;
prevnl = c == '\n';
}
return PGP_PROLOGUE;
}
/* Hack to eat the PGP epilogue. */
^"-----BEGIN PGP SIGNATURE-----\n" {
/* Eat everything to the end of the file. */
while (input (yyscanner) != EOF)
;
return PGP_EPILOGUE;
}
/* anything else is an error */
. {
return UNKNOWN_LINE;
}
%%
void
scanner_init (yyscan_t *scanner, struct parse_context *context, FILE *in)
{
yylex_init (scanner);
yyset_extra (context, *scanner);
yyset_in (in, *scanner);
}
void
scanner_destroy (yyscan_t scanner)
{
yylex_destroy (scanner);
}
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