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) 


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# File 'ext/sqlanywhere.c', line 1556

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.



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# File 'ext/sqlanywhere.c', line 1534

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.



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# File 'ext/sqlanywhere.c', line 1343

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) 


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# File 'ext/sqlanywhere.c', line 1509

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) 


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# File 'ext/sqlanywhere.c', line 1482

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) 


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# File 'ext/sqlanywhere.c', line 1385

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(val)->len;
	    *s_bind->value.length = length;
	    s_bind->value.buffer = malloc(length);
	    memcpy(s_bind->value.buffer, RSTRING(val)->ptr, length);
	    s_bind->value.type = A_STRING;
	    break;
	 case T_FIXNUM:
	    s_bind->value.buffer = malloc(sizeof(int));
	    *((int*)s_bind->value.buffer) = FIX2INT(val);
	    s_bind->value.type = A_VAL32;
	    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);
}