/*
* call-seq:
* res.fieldnum( name )
*
* Returns the index of the field specified by the string _name_.
*
* res=conn.exec("SELECT foo,bar AS biggles,jim,jam FROM mytable")
* puts res.fieldnum('foo') => 0
*
* Raises an ArgumentError if the specified _name_ isn't one of the field names;
* raises a TypeError if _name_ is not a String.
*/
static VALUE
pgresult_fieldnum(obj, name)
VALUE obj, name;
{
int n;
Check_Type(name, T_STRING);
n = PQfnumber(get_pgresult(obj), StringValuePtr(name));
if (n == -1) {
rb_raise(rb_eArgError,"Unknown field: %s", StringValuePtr(name));
}
return INT2NUM(n);
}