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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"
/* The generated code uses frames > 5000 bytes. */
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wframe-larger-than="
#pragma GCC diagnostic ignored "-Wstack-usage="
#endif
#define YY_EXTRA_TYPE struct parse_context *
extern void yyerror (YYLTYPE * yylloc, yyscan_t scanner, struct parse_context *context, const char *msg);
extern int yylex (YYSTYPE * yylval, YYLTYPE * yylloc, yyscan_t scanner);
extern int do_parse (struct parse_context *context, FILE *in);
extern void scanner_init (yyscan_t *scanner, struct parse_context *context, FILE *in);
extern void scanner_destroy (yyscan_t scanner);
/* Join two strings with \n */
static char *
concat_newline (const char *str1, const char *str2)
{
size_t len1, len2, len;
char *ret;
if (str2 == NULL)
return strdup (str1);
len1 = strlen (str1);
len2 = strlen (str2);
len = len1 + 1 /* \n */ + len2 + 1 /* \0 */;
ret = malloc (len);
memcpy (ret, str1, len1);
ret[len1] = '\n';
memcpy (ret + len1 + 1, str2, len2);
ret[len-1] = '\0';
return ret;
}
%}
%code requires {
#ifndef YY_TYPEDEF_YY_SCANNER_T
#define YY_TYPEDEF_YY_SCANNER_T
typedef void *yyscan_t;
#endif
}
%locations
%union {
struct section *section;
struct field *field;
char *str;
}
%token <str> SECTION_HEADER
%token <field> FIELD
%token <str> VALUE_CONT
%token EMPTY_LINE
%token PGP_PROLOGUE
%token PGP_EPILOGUE
%token UNKNOWN_LINE
%type <section> sections section
%type <field> fields field
%type <str> continuations
%pure-parser
%lex-param { yyscan_t scanner }
%parse-param { yyscan_t scanner }
%parse-param { struct parse_context *context }
%destructor { section_free ($$); } <section>
%destructor { field_free ($$); } <field>
%%
index:
sections
{ context->parsed_index = $1; }
| PGP_PROLOGUE sections PGP_EPILOGUE
{ context->parsed_index = $2; }
sections:
emptylines section emptylines
{ $$ = $2; }
| emptylines section EMPTY_LINE emptylines sections
{ $$ = $2; $$->next = $5; }
| emptylines
{ $$ = NULL; }
section:
SECTION_HEADER fields
{ $$ = malloc (sizeof (struct section));
$$->next = NULL;
$$->name = $1;
$$->fields = $2; }
fields:
/* empty */
{ $$ = NULL; }
| field fields
{ $$ = $1; $$->next = $2; }
field: FIELD continuations
{ $$ = $1;
char *old_value = $$->value;
$$->value = concat_newline (old_value, $2);
free (old_value);
free ($2); }
continuations:
/* empty */
{ $$ = NULL; }
| VALUE_CONT continuations
{ $$ = concat_newline ($1, $2);
free ($1);
free ($2); }
emptylines:
/* empty */
{}
| EMPTY_LINE emptylines
{}
%%
void
yyerror (YYLTYPE * yylloc, yyscan_t scanner, struct parse_context *context, const char *msg)
{
const int has_suffix =
context->error_suffix != NULL && context->error_suffix[0] != 0;
fprintf (stderr, "%s%s%s%ssyntax error at line %d: %s%s%s\n",
context->progname ? context->progname : "",
context->progname ? ": " : "",
context->input_file ? context->input_file : "",
context->input_file ? ": " : "",
yylloc->first_line, msg,
has_suffix ? " " : "",
has_suffix ? context->error_suffix : "");
}
int
do_parse (struct parse_context *context, FILE *in)
{
yyscan_t scanner;
int res;
scanner_init (&scanner, context, in);
res = yyparse (scanner, context);
scanner_destroy (scanner);
return res;
}
|
