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|
/* definition section */
/* literal block */
%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "proplist.h"
/* declarations for the following symbols is in filehandling.c */
extern int pl_line_count;
extern char *pl_curr_file;
extern proplist_t parse_result;
%}
/* token declarations */
%token <obj> STRING DATA ERROR YYERROR_VERBOSE YYDEBUG
%union {
proplist_t obj;
}
%type <obj> root object array objlist dictionary keyval_list keyval_pair
/* rules section */
%%
root: object
{
/* want an object, followed by nothing else (<<EOF>>) */
parse_result = $1;
return (int)$1;
}
| error
{
parse_result = (proplist_t)NULL;
return (int)NULL;
}
| ERROR
{
parse_result = (proplist_t)NULL;
return (int)NULL;
}
;
object: STRING
| DATA
| array
| dictionary
| error
{
return (int)NULL;
}
;
array: '(' objlist ')'
{$$ = $2;}
| '(' ')'
{$$ = PLMakeArrayFromElements(NULL);}
| error
{ return (int)NULL; }
;
objlist: objlist ',' object
{
if($1)
{
if ($3)
{
$$ = PLAppendArrayElement($1,$3);
PLRelease($3);
}
else
$$ = $1;
}
else if ($3)
{
$$ = PLMakeArrayFromElements($3, NULL);
PLRelease($3);
}
else
$$ = NULL;
}
| object
{
$$ = PLMakeArrayFromElements($1,
NULL);
PLRelease($1);
}
| error
{
$$ = NULL;
}
;
dictionary: '{' keyval_list '}'
{$$ = $2;}
| '{' '}'
{$$ =
PLMakeDictionaryFromEntries(NULL,
NULL);}
| error
{
$$ = NULL;
}
;
keyval_list: keyval_list keyval_pair
{
if($1)
{
$$ = $1;
if($2)
{
PLMergeDictionaries($$, $2);
PLRelease($2);
}
}
else if($2)
$$ = $2;
else
$$ = NULL;
}
| keyval_pair
| error
{
$$ = NULL;
}
;
keyval_pair: STRING '=' object ';'
{
if (($1) && ($3))
{
$$ = PLMakeDictionaryFromEntries($1, $3,
NULL);
PLRelease($1); PLRelease($3);
}
else
{
if ($1)
PLRelease($1);
if ($3)
PLRelease($3);
$$ = NULL;
}
}
| error
{
$$ = NULL;
}
;
%%
/* C code section */
int yyerror(char *s)
{
fprintf(stderr, "%s:line %d: %s\n", pl_curr_file, pl_line_count, s);
return 0;
}
|
