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wbemprox: Add support for evaluating query conditions.
This commit is contained in:
Hans Leidekker
Alexandre Julliard
parent
d75375ea45
commit
19f203c7b2
@ -39,15 +39,275 @@ HRESULT create_view( const struct property *proplist, const WCHAR *class,
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view->proplist = proplist;
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view->table = get_table( class );
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view->cond = cond;
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view->result = NULL;
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view->count = 0;
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*ret = view;
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return S_OK;
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}
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void destroy_view( struct view *view )
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{
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heap_free( view->result );
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heap_free( view );
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}
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static HRESULT get_column_index( const struct table *table, const WCHAR *name, UINT *column )
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{
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UINT i;
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for (i = 0; i < table->num_cols; i++)
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{
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if (!strcmpiW( table->columns[i].name, name ))
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{
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*column = i;
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return S_OK;
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}
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}
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return WBEM_E_INVALID_QUERY;
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}
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static UINT get_column_size( const struct table *table, UINT column )
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{
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if (table->columns[column].type & CIM_FLAG_ARRAY) return sizeof(void *);
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switch (table->columns[column].type)
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{
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case CIM_SINT16:
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case CIM_UINT16:
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return sizeof(INT16);
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case CIM_SINT32:
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case CIM_UINT32:
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return sizeof(INT32);
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case CIM_DATETIME:
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case CIM_STRING:
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return sizeof(WCHAR *);
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default:
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ERR("unkown column type %u\n", table->columns[column].type);
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break;
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}
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return sizeof(INT32);
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}
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static UINT get_column_offset( const struct table *table, UINT column )
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{
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UINT i, offset = 0;
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for (i = 0; i < column; i++) offset += get_column_size( table, i );
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return offset;
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}
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static UINT get_row_size( const struct table *table )
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{
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return get_column_offset( table, table->num_cols - 1 ) + get_column_size( table, table->num_cols - 1 );
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}
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static HRESULT get_value( const struct table *table, UINT row, UINT column, INT_PTR *val )
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{
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UINT col_offset, row_size;
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const BYTE *ptr;
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col_offset = get_column_offset( table, column );
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row_size = get_row_size( table );
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ptr = table->data + row * row_size + col_offset;
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if (table->columns[column].type & CIM_FLAG_ARRAY)
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{
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*val = (INT_PTR)*(const void **)ptr;
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return S_OK;
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}
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switch (table->columns[column].type)
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{
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case CIM_DATETIME:
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case CIM_STRING:
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*val = (INT_PTR)*(const WCHAR **)ptr;
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break;
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case CIM_SINT16:
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*val = *(const INT16 *)ptr;
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break;
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case CIM_UINT16:
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*val = *(const UINT16 *)ptr;
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break;
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case CIM_SINT32:
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*val = *(const INT32 *)ptr;
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break;
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case CIM_UINT32:
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*val = *(const UINT32 *)ptr;
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break;
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default:
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ERR("invalid column type %u\n", table->columns[column].type);
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*val = 0;
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break;
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}
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return S_OK;
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}
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static BOOL eval_like( INT_PTR lval, INT_PTR rval )
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{
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const WCHAR *p = (const WCHAR *)lval, *q = (const WCHAR *)rval;
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while (*p && *q)
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{
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if (*q == '%')
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{
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while (*q == '%') q++;
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if (!*q) return TRUE;
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while (*p && toupperW( p[1] ) != toupperW( q[1] )) p++;
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if (!*p) return TRUE;
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}
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if (toupperW( *p++ ) != toupperW( *q++ )) return FALSE;
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}
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return TRUE;
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}
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static HRESULT eval_cond( const struct table *, UINT, const struct expr *, INT_PTR * );
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static BOOL eval_binary( const struct table *table, UINT row, const struct complex_expr *expr,
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INT_PTR *val )
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{
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HRESULT lret, rret;
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INT_PTR lval, rval;
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lret = eval_cond( table, row, expr->left, &lval );
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rret = eval_cond( table, row, expr->right, &rval );
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if (lret != S_OK || rret != S_OK) return WBEM_E_INVALID_QUERY;
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switch (expr->op)
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{
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case OP_EQ:
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*val = (lval == rval);
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break;
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case OP_AND:
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*val = (lval && rval);
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break;
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case OP_OR:
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*val = (lval || rval);
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break;
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case OP_GT:
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*val = (lval > rval);
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break;
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case OP_LT:
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*val = (lval < rval);
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break;
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case OP_LE:
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*val = (lval <= rval);
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break;
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case OP_GE:
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*val = (lval >= rval);
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break;
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case OP_NE:
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*val = (lval != rval);
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break;
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case OP_LIKE:
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*val = eval_like( lval, rval );
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break;
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default:
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ERR("unknown operator %u\n", expr->op);
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return WBEM_E_INVALID_QUERY;
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}
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return S_OK;
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}
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static HRESULT eval_unary( const struct table *table, UINT row, const struct complex_expr *expr,
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INT_PTR *val )
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{
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HRESULT hr;
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UINT column;
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INT_PTR lval;
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hr = get_column_index( table, expr->left->u.propval->name, &column );
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if (hr != S_OK)
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return hr;
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hr = get_value( table, row, column, &lval );
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if (hr != S_OK)
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return hr;
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switch (expr->op)
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{
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case OP_ISNULL:
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*val = !lval;
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break;
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case OP_NOTNULL:
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*val = lval;
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break;
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default:
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ERR("unknown operator %u\n", expr->op);
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return WBEM_E_INVALID_QUERY;
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}
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return S_OK;
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}
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static HRESULT eval_propval( const struct table *table, UINT row, const struct property *propval,
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INT_PTR *val )
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{
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HRESULT hr;
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UINT column;
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hr = get_column_index( table, propval->name, &column );
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if (hr != S_OK)
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return hr;
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return get_value( table, row, column, val );
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}
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static HRESULT eval_cond( const struct table *table, UINT row, const struct expr *cond,
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INT_PTR *val )
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{
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if (!cond)
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{
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*val = 1;
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return S_OK;
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}
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switch (cond->type)
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{
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case EXPR_COMPLEX:
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return eval_binary( table, row, &cond->u.expr, val );
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case EXPR_UNARY:
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return eval_unary( table, row, &cond->u.expr, val );
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case EXPR_PROPVAL:
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return eval_propval( table, row, cond->u.propval, val );
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case EXPR_SVAL:
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*val = (INT_PTR)cond->u.sval;
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return S_OK;
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case EXPR_IVAL:
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case EXPR_BVAL:
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*val = cond->u.ival;
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return S_OK;
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default:
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ERR("invalid expression type\n");
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break;
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}
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return WBEM_E_INVALID_QUERY;
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}
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static HRESULT execute_view( struct view *view )
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{
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UINT i, j = 0, len;
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if (!view->table || !view->table->num_rows) return S_OK;
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len = min( view->table->num_rows, 16 );
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if (!(view->result = heap_alloc( len * sizeof(UINT) ))) return E_OUTOFMEMORY;
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for (i = 0; i < view->table->num_rows; i++)
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{
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HRESULT hr;
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INT_PTR val = 0;
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if (j >= len)
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{
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UINT *tmp;
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len *= 2;
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if (!(tmp = heap_realloc( view->result, len * sizeof(UINT) ))) return E_OUTOFMEMORY;
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view->result = tmp;
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}
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if ((hr = eval_cond( view->table, i, view->cond, &val )) != S_OK) return hr;
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if (val) view->result[j++] = i;
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}
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view->count = j;
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return S_OK;
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}
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static struct query *alloc_query(void)
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{
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struct query *query;
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@ -77,12 +337,12 @@ HRESULT exec_query( const WCHAR *str, IEnumWbemClassObject **result )
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*result = NULL;
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if (!(query = alloc_query())) return E_OUTOFMEMORY;
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hr = parse_query( str, &query->view, &query->mem );
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if (hr != S_OK)
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{
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free_query( query );
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return hr;
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}
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if (hr != S_OK) goto done;
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hr = execute_view( query->view );
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if (hr != S_OK) goto done;
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hr = EnumWbemClassObject_create( NULL, query, (void **)result );
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done:
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if (hr != S_OK) free_query( query );
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return hr;
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}
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@ -93,6 +93,8 @@ struct view
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const struct property *proplist;
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struct table *table;
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const struct expr *cond;
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UINT *result;
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UINT count;
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};
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struct query
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@ -119,6 +121,12 @@ static inline void *heap_alloc( size_t len )
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return HeapAlloc( GetProcessHeap(), 0, len );
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}
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static void *heap_realloc( void *mem, size_t len ) __WINE_ALLOC_SIZE(2);
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static inline void *heap_realloc( void *mem, size_t len )
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{
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return HeapReAlloc( GetProcessHeap(), 0, mem, len );
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}
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static inline BOOL heap_free( void *mem )
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{
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return HeapFree( GetProcessHeap(), 0, mem );
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