Sweden-Number/dlls/wbemprox/wql.y

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%{
/*
* Copyright 2012 Hans Leidekker for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "wbemcli.h"
#include "wbemprox_private.h"
#include "wine/list.h"
#include "wine/debug.h"
#include "wine/unicode.h"
WINE_DEFAULT_DEBUG_CHANNEL(wbemprox);
struct parser
{
const WCHAR *cmd;
UINT idx;
UINT len;
HRESULT error;
struct view **view;
struct list *mem;
};
struct string
{
const WCHAR *data;
int len;
};
static void *alloc_mem( struct parser *parser, UINT size )
{
struct list *mem = heap_alloc( sizeof(struct list) + size );
list_add_tail( parser->mem, mem );
return &mem[1];
}
static struct property *alloc_property( struct parser *parser, const WCHAR *class, const WCHAR *name )
{
struct property *prop = alloc_mem( parser, sizeof(*prop) );
if (prop)
{
prop->name = name;
prop->class = class;
prop->next = NULL;
}
return prop;
}
static WCHAR *get_string( struct parser *parser, const struct string *str )
{
const WCHAR *p = str->data;
int len = str->len;
WCHAR *ret;
if ((p[0] == '\"' && p[len - 1] != '\"') ||
(p[0] == '\'' && p[len - 1] != '\'')) return NULL;
if ((p[0] == '\"' && p[len - 1] == '\"') ||
(p[0] == '\'' && p[len - 1] == '\''))
{
p++;
len -= 2;
}
if (!(ret = alloc_mem( parser, (len + 1) * sizeof(WCHAR) ))) return NULL;
memcpy( ret, p, len * sizeof(WCHAR) );
ret[len] = 0;
return ret;
}
static int get_int( struct parser *parser )
{
const WCHAR *p = &parser->cmd[parser->idx];
int i, ret = 0;
for (i = 0; i < parser->len; i++)
{
if (p[i] < '0' || p[i] > '9')
{
ERR("should only be numbers here!\n");
break;
}
ret = (p[i] - '0') + ret * 10;
}
return ret;
}
static struct expr *expr_complex( struct parser *parser, struct expr *l, UINT op, struct expr *r )
{
struct expr *e = alloc_mem( parser, sizeof(*e) );
if (e)
{
e->type = EXPR_COMPLEX;
e->u.expr.left = l;
e->u.expr.op = op;
e->u.expr.right = r;
}
return e;
}
static struct expr *expr_unary( struct parser *parser, struct expr *l, UINT op )
{
struct expr *e = alloc_mem( parser, sizeof(*e) );
if (e)
{
e->type = EXPR_UNARY;
e->u.expr.left = l;
e->u.expr.op = op;
e->u.expr.right = NULL;
}
return e;
}
static struct expr *expr_ival( struct parser *parser, int val )
{
struct expr *e = alloc_mem( parser, sizeof *e );
if (e)
{
e->type = EXPR_IVAL;
e->u.ival = val;
}
return e;
}
static struct expr *expr_sval( struct parser *parser, const struct string *str )
{
struct expr *e = alloc_mem( parser, sizeof *e );
if (e)
{
e->type = EXPR_SVAL;
e->u.sval = get_string( parser, str );
if (!e->u.sval)
return NULL; /* e will be freed by query destructor */
}
return e;
}
static struct expr *expr_bval( struct parser *parser, int val )
{
struct expr *e = alloc_mem( parser, sizeof *e );
if (e)
{
e->type = EXPR_BVAL;
e->u.ival = val;
}
return e;
}
static struct expr *expr_propval( struct parser *parser, const struct property *prop )
{
struct expr *e = alloc_mem( parser, sizeof *e );
if (e)
{
e->type = EXPR_PROPVAL;
e->u.propval = prop;
}
return e;
}
static int wql_error( struct parser *parser, const char *str );
static int wql_lex( void *val, struct parser *parser );
#define PARSER_BUBBLE_UP_VIEW( parser, result, current_view ) \
*parser->view = current_view; \
result = current_view
%}
%lex-param { struct parser *ctx }
%parse-param { struct parser *ctx }
%define parse.error verbose
%pure-parser
%union
{
struct string str;
WCHAR *string;
struct property *proplist;
struct view *view;
struct expr *expr;
int integer;
}
%token TK_SELECT TK_FROM TK_STAR TK_COMMA TK_DOT TK_IS TK_LP TK_RP TK_NULL TK_FALSE TK_TRUE
%token TK_INTEGER TK_WHERE TK_SPACE TK_MINUS TK_ILLEGAL TK_BY
%token <str> TK_STRING TK_ID
%type <string> id
%type <proplist> prop proplist
%type <view> select
%type <expr> expr prop_val const_val string_val
%type <integer> number
%left TK_OR
%left TK_AND
%left TK_NOT
%left TK_EQ TK_NE TK_LT TK_GT TK_LE TK_GE TK_LIKE
%%
select:
TK_SELECT TK_FROM id
{
HRESULT hr;
struct parser *parser = ctx;
struct view *view;
hr = create_view( NULL, $3, NULL, &view );
if (hr != S_OK)
YYABORT;
PARSER_BUBBLE_UP_VIEW( parser, $$, view );
}
| TK_SELECT proplist TK_FROM id
{
HRESULT hr;
struct parser *parser = ctx;
struct view *view;
hr = create_view( $2, $4, NULL, &view );
if (hr != S_OK)
YYABORT;
PARSER_BUBBLE_UP_VIEW( parser, $$, view );
}
| TK_SELECT proplist TK_FROM id TK_WHERE expr
{
HRESULT hr;
struct parser *parser = ctx;
struct view *view;
hr = create_view( $2, $4, $6, &view );
if (hr != S_OK)
YYABORT;
PARSER_BUBBLE_UP_VIEW( parser, $$, view );
}
;
proplist:
prop
| prop TK_COMMA proplist
{
$1->next = $3;
}
| TK_STAR
{
$$ = NULL;
}
;
prop:
id TK_DOT id
{
$$ = alloc_property( ctx, $1, $3 );
if (!$$)
YYABORT;
}
| id
{
$$ = alloc_property( ctx, NULL, $1 );
if (!$$)
YYABORT;
}
;
id:
TK_ID
{
$$ = get_string( ctx, &$1 );
if (!$$)
YYABORT;
}
;
number:
TK_INTEGER
{
$$ = get_int( ctx );
}
;
expr:
TK_LP expr TK_RP
{
$$ = $2;
if (!$$)
YYABORT;
}
| expr TK_AND expr
{
$$ = expr_complex( ctx, $1, OP_AND, $3 );
if (!$$)
YYABORT;
}
| expr TK_OR expr
{
$$ = expr_complex( ctx, $1, OP_OR, $3 );
if (!$$)
YYABORT;
}
| TK_NOT expr
{
$$ = expr_unary( ctx, $2, OP_NOT );
if (!$$)
YYABORT;
}
| prop_val TK_EQ const_val
{
$$ = expr_complex( ctx, $1, OP_EQ, $3 );
if (!$$)
YYABORT;
}
| prop_val TK_GT const_val
{
$$ = expr_complex( ctx, $1, OP_GT, $3 );
if (!$$)
YYABORT;
}
| prop_val TK_LT const_val
{
$$ = expr_complex( ctx, $1, OP_LT, $3 );
if (!$$)
YYABORT;
}
| prop_val TK_LE const_val
{
$$ = expr_complex( ctx, $1, OP_LE, $3 );
if (!$$)
YYABORT;
}
| prop_val TK_GE const_val
{
$$ = expr_complex( ctx, $1, OP_GE, $3 );
if (!$$)
YYABORT;
}
| prop_val TK_NE const_val
{
$$ = expr_complex( ctx, $1, OP_NE, $3 );
if (!$$)
YYABORT;
}
| const_val TK_EQ prop_val
{
$$ = expr_complex( ctx, $1, OP_EQ, $3 );
if (!$$)
YYABORT;
}
| const_val TK_GT prop_val
{
$$ = expr_complex( ctx, $1, OP_GT, $3 );
if (!$$)
YYABORT;
}
| const_val TK_LT prop_val
{
$$ = expr_complex( ctx, $1, OP_LT, $3 );
if (!$$)
YYABORT;
}
| const_val TK_LE prop_val
{
$$ = expr_complex( ctx, $1, OP_LE, $3 );
if (!$$)
YYABORT;
}
| const_val TK_GE prop_val
{
$$ = expr_complex( ctx, $1, OP_GE, $3 );
if (!$$)
YYABORT;
}
| const_val TK_NE prop_val
{
$$ = expr_complex( ctx, $1, OP_NE, $3 );
if (!$$)
YYABORT;
}
| prop_val TK_LIKE string_val
{
$$ = expr_complex( ctx, $1, OP_LIKE, $3 );
if (!$$)
YYABORT;
}
| prop_val TK_IS TK_NULL
{
$$ = expr_unary( ctx, $1, OP_ISNULL );
if (!$$)
YYABORT;
}
| prop_val TK_IS TK_NOT TK_NULL
{
$$ = expr_unary( ctx, $1, OP_NOTNULL );
if (!$$)
YYABORT;
}
| prop_val TK_EQ TK_NULL
{
$$ = expr_unary( ctx, $1, OP_ISNULL );
if (!$$)
YYABORT;
}
| TK_NULL TK_EQ prop_val
{
$$ = expr_unary( ctx, $3, OP_ISNULL );
if (!$$)
YYABORT;
}
| prop_val TK_NE TK_NULL
{
$$ = expr_unary( ctx, $1, OP_NOTNULL );
if (!$$)
YYABORT;
}
| TK_NULL TK_NE prop_val
{
$$ = expr_unary( ctx, $3, OP_NOTNULL );
if (!$$)
YYABORT;
}
;
string_val:
TK_STRING
{
$$ = expr_sval( ctx, &$1 );
if (!$$)
YYABORT;
}
;
prop_val:
prop
{
$$ = expr_propval( ctx, $1 );
if (!$$)
YYABORT;
}
;
const_val:
number
{
$$ = expr_ival( ctx, $1 );
if (!$$)
YYABORT;
}
| TK_STRING
{
$$ = expr_sval( ctx, &$1 );
if (!$$)
YYABORT;
}
| TK_TRUE
{
$$ = expr_bval( ctx, -1 );
if (!$$)
YYABORT;
}
| TK_FALSE
{
$$ = expr_bval( ctx, 0 );
if (!$$)
YYABORT;
}
;
%%
HRESULT parse_query( const WCHAR *str, struct view **view, struct list *mem )
{
struct parser parser;
int ret;
*view = NULL;
parser.cmd = str;
parser.idx = 0;
parser.len = 0;
parser.error = WBEM_E_INVALID_QUERY;
parser.view = view;
parser.mem = mem;
ret = wql_parse( &parser );
TRACE("wql_parse returned %d\n", ret);
if (ret)
{
if (*parser.view)
{
destroy_view( *parser.view );
*parser.view = NULL;
}
return parser.error;
}
return S_OK;
}
static const char id_char[] =
{
0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
};
struct keyword
{
const WCHAR *name;
unsigned int len;
int type;
};
#define MAX_TOKEN_LEN 6
static const WCHAR andW[] = {'A','N','D'};
static const WCHAR byW[] = {'B','Y'};
static const WCHAR falseW[] = {'F','A','L','S','E'};
static const WCHAR fromW[] = {'F','R','O','M'};
static const WCHAR isW[] = {'I','S'};
static const WCHAR likeW[] = {'L','I','K','E'};
static const WCHAR notW[] = {'N','O','T'};
static const WCHAR nullW[] = {'N','U','L','L'};
static const WCHAR orW[] = {'O','R'};
static const WCHAR selectW[] = {'S','E','L','E','C','T'};
static const WCHAR trueW[] = {'T','R','U','E'};
static const WCHAR whereW[] = {'W','H','E','R','E'};
static const struct keyword keyword_table[] =
{
{ andW, ARRAY_SIZE(andW), TK_AND },
{ byW, ARRAY_SIZE(byW), TK_BY },
{ falseW, ARRAY_SIZE(falseW), TK_FALSE },
{ fromW, ARRAY_SIZE(fromW), TK_FROM },
{ isW, ARRAY_SIZE(isW), TK_IS },
{ likeW, ARRAY_SIZE(likeW), TK_LIKE },
{ notW, ARRAY_SIZE(notW), TK_NOT },
{ nullW, ARRAY_SIZE(nullW), TK_NULL },
{ orW, ARRAY_SIZE(orW), TK_OR },
{ selectW, ARRAY_SIZE(selectW), TK_SELECT },
{ trueW, ARRAY_SIZE(trueW), TK_TRUE },
{ whereW, ARRAY_SIZE(whereW), TK_WHERE }
};
static int cmp_keyword( const void *arg1, const void *arg2 )
{
const struct keyword *key1 = arg1, *key2 = arg2;
int len = min( key1->len, key2->len );
int ret;
if ((ret = strncmpiW( key1->name, key2->name, len ))) return ret;
if (key1->len < key2->len) return -1;
else if (key1->len > key2->len) return 1;
return 0;
}
static int keyword_type( const WCHAR *str, unsigned int len )
{
struct keyword key, *ret;
if (len > MAX_TOKEN_LEN) return TK_ID;
key.name = str;
key.len = len;
key.type = 0;
ret = bsearch( &key, keyword_table, ARRAY_SIZE(keyword_table), sizeof(struct keyword), cmp_keyword );
if (ret) return ret->type;
return TK_ID;
}
static int get_token( const WCHAR *s, int *token )
{
int i;
switch (*s)
{
case ' ':
case '\t':
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case '\r':
case '\n':
for (i = 1; isspaceW( s[i] ); i++) {}
*token = TK_SPACE;
return i;
case '-':
if (!s[1]) return -1;
*token = TK_MINUS;
return 1;
case '(':
*token = TK_LP;
return 1;
case ')':
*token = TK_RP;
return 1;
case '*':
*token = TK_STAR;
return 1;
case '=':
*token = TK_EQ;
return 1;
case '<':
if (s[1] == '=' )
{
*token = TK_LE;
return 2;
}
else if (s[1] == '>')
{
*token = TK_NE;
return 2;
}
else
{
*token = TK_LT;
return 1;
}
case '>':
if (s[1] == '=')
{
*token = TK_GE;
return 2;
}
else
{
*token = TK_GT;
return 1;
}
case '!':
if (s[1] != '=')
{
*token = TK_ILLEGAL;
return 2;
}
else
{
*token = TK_NE;
return 2;
}
case ',':
*token = TK_COMMA;
return 1;
case '\"':
case '\'':
for (i = 1; s[i]; i++)
{
if (s[i] == s[0]) break;
}
if (s[i]) i++;
*token = TK_STRING;
return i;
case '.':
if (!isdigitW( s[1] ))
{
*token = TK_DOT;
return 1;
}
/* fall through */
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
*token = TK_INTEGER;
for (i = 1; isdigitW( s[i] ); i++) {}
return i;
default:
if (!id_char[*s]) break;
for (i = 1; id_char[s[i]]; i++) {}
*token = keyword_type( s, i );
return i;
}
*token = TK_ILLEGAL;
return 1;
}
static int wql_lex( void *p, struct parser *parser )
{
struct string *str = p;
int token = -1;
do
{
parser->idx += parser->len;
if (!parser->cmd[parser->idx]) return 0;
parser->len = get_token( &parser->cmd[parser->idx], &token );
if (!parser->len) break;
str->data = &parser->cmd[parser->idx];
str->len = parser->len;
} while (token == TK_SPACE);
return token;
}
static int wql_error( struct parser *parser, const char *str )
{
ERR("%s\n", str);
return 0;
}