Class: SQLAnywhere::a_sqlany_bind_param

Inherits:
Object
  • Object
show all
Defined in:
ext/sqlanywhere.c

Instance Method Summary collapse

Instance Method Details

#finish(VALUEbind) ⇒ nil

Frees the resources associated with the bound parameter.

<b>Parameters</b>:
- <tt>VALUE bind</tt> -- Bound parameter retrieved from sqlany_describe_bind_param().

<b>Returns</b>:
- <tt>nil</tt>.

Returns:

  • (nil) 


1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
 
# File 'ext/sqlanywhere.c', line 1622

static VALUE
static_Bind_finish(VALUE bind)
{
    a_sqlany_bind_param* s_bind;

    Data_Get_Struct(bind, a_sqlany_bind_param, s_bind);

    // FIXME: use Ruby's allocation routines?
    if (s_bind) { free(s_bind);};

    return (Qnil);
}

#get_direction(VALUEbind) ⇒ Object

Gets the direction of the bound parameter.

<b>Parameters</b>:
- <tt>VALUE bind</tt> -- Bound parameter retrieved from sqlany_describe_bind_param().

<b>Returns</b>:
- <tt>VALUE name</tt>: The direction of the bound parameter.



1600
1601
1602
1603
1604
1605
1606
1607
 
# File 'ext/sqlanywhere.c', line 1600

static VALUE
static_Bind_get_direction(VALUE bind)
{
    a_sqlany_bind_param* s_bind;
    Data_Get_Struct(bind, a_sqlany_bind_param, s_bind);

    return (CHR2FIX(s_bind->direction));
}

#get_name(VALUEbind) ⇒ Object

Gets the name of the bound parameter.

<b>Parameters</b>:
- <tt>VALUE bind</tt> -- Bound parameter retrieved from sqlany_describe_bind_param().

<b>Returns</b>:
- <tt>VALUE name</tt>: The bound variable's name.



1403
1404
1405
1406
1407
1408
1409
 
# File 'ext/sqlanywhere.c', line 1403

static VALUE
static_Bind_get_name(VALUE bind)
{
    a_sqlany_bind_param* s_bind;
    Data_Get_Struct(bind, a_sqlany_bind_param, s_bind);
    return (rb_str_new2(s_bind->name));
}

#set_buffer_size(VALUEbind, VALUEsize) ⇒ nil

Sets the buffer size of INOUT and OUT parameters for string and binary

data.

<b>Parameters</b>:
- <tt>VALUE bind</tt> -- Bound parameter retrieved from sqlany_describe_bind_param().
- <tt>VALUE size</tt> -- The size of the buffer to hold the INOUT or OUT parameter.

<b>Returns</b>:
- <tt>nil</tt>.

Returns:

  • (nil) 


1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
 
# File 'ext/sqlanywhere.c', line 1575

static VALUE
static_Bind_set_buffer_size(VALUE bind, VALUE size)
{
    a_sqlany_bind_param* s_bind;

    Data_Get_Struct(bind, a_sqlany_bind_param, s_bind);

    s_bind->value.buffer_size = NUM2INT(size);

    return (Qnil);
}

#set_direction(VALUEbind, VALUEdirection) ⇒ nil

Sets the direction of the bound parameter before binding.

<b>Parameters</b>:
- <tt>VALUE bind</tt> -- Bound parameter retrieved from sqlany_describe_bind_param().
- <tt>VALUE direction</tt> -- The direction of the binding variable.

<b>Returns</b>:
- <tt>nil</tt>.

Returns:

  • (nil) 


1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
 
# File 'ext/sqlanywhere.c', line 1548

static VALUE
static_Bind_set_direction(VALUE bind, VALUE direction)
{
    a_sqlany_bind_param* s_bind;

    Data_Get_Struct(bind, a_sqlany_bind_param, s_bind);

    s_bind->direction = NUM2CHR(direction);

    return (Qnil);
}

#set_value(VALUEbind, VALUEval) ⇒ nil

Sets the value of a bind parameter.

This function is used to bind a Ruby VALUE to a given parameter in a
prepared statement. If the bind_direction is INPUT only, the type INPUT
will be bound based on the RUBY type:

  +-------------+------------+
  | Ruby Type   |  Bind Type |
  +-------------+------------+
  | T_STRING   =>  A_STRING  |
  | T_FIXNUM   =>  A_VAL_32  |
  | T_BIGNUM   =>  A_DOUBLE  |
  | T_FLOAT    =>  A_DOUBLE  |
  | T_STRING   =>  A_STRING  |
  | T_NIL      => isnull = 1 |
  +--------------------------+

If the bind direction is OUTPUT, instead use the DBCAPI type to set the
size of the buffer.

In the case of INOUT parameters, it is the application's job to call this
method twice, once to bind the INPUT, and once to bind the OUTPUT.

<b>Parameters</b>:
- <tt>VALUE bind</tt> -- Bound parameter retrieved from sqlany_describe_bind_param().
- <tt>VALUE val</tt> -- The value to bind into the bound variable.

<b>Returns</b>:
- <tt>nil</tt>.

Returns:

  • (nil) 


1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
 
# File 'ext/sqlanywhere.c', line 1445

static VALUE
static_Bind_set_value(VALUE bind, VALUE val)
{
    a_sqlany_bind_param* s_bind;
    int length;

    Data_Get_Struct(bind, a_sqlany_bind_param, s_bind); 

    // FIXME: use Ruby's allocation routines?
    s_bind->value.is_null = malloc(sizeof(sacapi_bool));
    *s_bind->value.is_null = 0;

    if (s_bind->direction == DD_INPUT)
    {
       switch(TYPE(val))
       {
	 case T_STRING:      
	    s_bind->value.length  = malloc(sizeof(size_t));
	    length = RSTRING_LEN(val);
	    *s_bind->value.length = length;
	    s_bind->value.buffer = malloc(length);
	    memcpy(s_bind->value.buffer, RSTRING_PTR(val), length);
	    s_bind->value.type = A_STRING;
	    break;
	 case T_FIXNUM:
	    if(sizeof(void*) == 4){ //32-bit
            s_bind->value.buffer = malloc(sizeof(int));
	        *((int*)s_bind->value.buffer) = FIX2INT(val);
	        s_bind->value.type = A_VAL32;
	    }else{ //64-bit
            s_bind->value.buffer = malloc(sizeof(long));
            *((long*)s_bind->value.buffer) = FIX2LONG(val);
            s_bind->value.type = A_VAL64;
	    }
	    break;
	 case T_BIGNUM:
	    s_bind->value.buffer = malloc(sizeof(LONG_LONG));
	    *((LONG_LONG*)s_bind->value.buffer) = rb_num2ll(val);	
	    s_bind->value.type = A_VAL64;  
	    break;
	 case T_FLOAT:
	    s_bind->value.buffer = malloc(sizeof(double));
	    *((double*)s_bind->value.buffer) = NUM2DBL(val);
	    s_bind->value.type = A_DOUBLE;
	    break;
	 case T_NIL:
	    *s_bind->value.is_null = 1;	 	 
	    s_bind->value.buffer = malloc(sizeof(int));
	    s_bind->value.type = A_VAL32;
	    break;
	 default:
	    rb_raise(rb_eTypeError, "Cannot convert type. Must be STRING, FIXNUM, BIGNUM, FLOAT, or NIL");
	    break;
       }
    }
    else
    {
      switch (s_bind->value.type)
      {
	 case A_STRING:
	    s_bind->value.buffer = malloc(s_bind->value.buffer_size);
	    break;
	 case A_DOUBLE:
	    s_bind->value.buffer = malloc(sizeof(float));
	    break;
   	 case A_VAL64:
   	 case A_UVAL64:
	    s_bind->value.buffer = malloc(sizeof(LONG_LONG));	   
	    break;
         case A_VAL32:
         case A_UVAL32:
	    s_bind->value.buffer = malloc(sizeof(int));
	    break;
	 case A_VAL16:
	 case A_UVAL16:
	    s_bind->value.buffer = malloc(sizeof(short));
	    break;
	 case A_VAL8:
	 case A_UVAL8:
   	    s_bind->value.buffer = malloc(sizeof(char));
	    break;
	 default:
	    rb_raise(rb_eTypeError, "Type unknown");
	    break;
      }
    }
    return (Qnil);
}