public unsafe FastDbBuffer(string name, CLI.FieldType var_type, CLI.FieldFlags idx_flags)
{
buffer = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(CLI.UnmanagedBuffer)));
((CLI.UnmanagedBuffer*)buffer)->fetch_data = true;
((CLI.UnmanagedBuffer*)buffer)->type = (int)var_type;
((CLI.UnmanagedBuffer*)buffer)->size = CLI.SizeOfCliType[(int)var_type];
((CLI.UnmanagedBuffer*)buffer)->capacity = MIN_CAPACITY;
((CLI.UnmanagedBuffer*)buffer)->data = Marshal.AllocCoTaskMem(MIN_CAPACITY);
this.name = name; //Marshal.StringToHGlobalAnsi(name);
this.flags = (int)idx_flags;
disposed = false;
}
/// <summary>
/// Detach current thread from the database. Each thread except one opened the database
/// should perform attach to the database before any access to the database,
/// and detach after end of the work with database
/// <seealso cref="CLI.CliDetachMode"/>
/// </summary>
/// <param name="mode">Optional parameter indicating the detach action.</param>
public void Detach(CLI.CliDetachMode mode)
{
CLI.CliCheck(CLI.cli_detach(session, mode));
}
/// <summary>
/// Alter index on a field
/// </summary>
/// <param name="TableName">Name of the table</param>
/// <param name="FieldName">Name of the field</param>
/// <param name="NewFlags">New index types.</param>
public void AlterIndex(string TableName, string FieldName, CLI.FieldFlags NewFlags)
{
CLI.CliCheck(CLI.cli_alter_index(session, TableName, FieldName, NewFlags));
}
/// <summary>
/// Add a parameter to the FastDbParameters collection.
/// </summary>
/// <param name="name">Parameter name (as it appears in the SQL statement) without preceeding "%".</param>
/// <param name="param_type">Parameter type (it must match the type of the associated field).</param>
/// <param name="capacity">Optional capacity of the underlying memory buffer.</param>
/// <returns>A object representing the newly created parameter</returns>
public FastDbParameter Add(string name, CLI.FieldType param_type, int capacity)
{
int i = items.Add(new FastDbParameter(name, param_type, capacity));
return (FastDbParameter)items[i];
}
public FastDbParameter Add(string name, CLI.FieldType param_type)
{
Debug.Assert(param_type >= CLI.FieldType.cli_oid && param_type < CLI.FieldType.cli_array_of_oid,
String.Format("Parameter type {0} not supported!", Enum.GetName(typeof(CLI.FieldType), param_type)));
return this.Add(name, param_type, 0);
}
public FastDbParameter(string name, CLI.FieldType var_type, int capacity)
: base(name, var_type, CLI.FieldFlags.cli_noindex)
{
}
/// <summary>
/// Constructor that creates an instance of the FastDbField. You would
/// normally not use it directly, but by invoking: <see cref="FastDbFields.Add"/> method.
/// </summary>
/// <param name="name">The name of the field.</param>
/// <param name="var_type">The type of the field.</param>
/// <param name="capacity">Optional capacity of the field's buffer.</param>
public FastDbParameter(string name, CLI.FieldType var_type)
: this(name, var_type, 0)
{
}
/// <summary>
/// Use this method to add a field to the collection.
/// </summary>
/// <param name="name">Name of the field</param>
/// <param name="field_type">Type of the field</param>
/// <param name="index_type">Optional index to be built on the field (default: CLI.FieldFlags.no_index)</param>
/// <param name="ref_table">Reference table name (used for inverse references). Default: null.</param>
/// <param name="inv_ref_field">Inverse reference field name (default: null)</param>
/// <returns></returns>
public FastDbField Add(string name, CLI.FieldType field_type, CLI.FieldFlags index_type, string ref_table, string inv_ref_field)
{
int i = items.Add(new FastDbField(name, field_type, index_type, ref_table, inv_ref_field));
return (FastDbField)items[i];
}
public FastDbField Add(string name, CLI.FieldType field_type, CLI.FieldFlags index_type, string ref_table)
{
return Add(name, field_type, index_type, ref_table, null);
}
public FastDbField Add(string name, CLI.FieldType field_type)
{
return Add(name, field_type, CLI.FieldFlags.cli_noindex, null, null);
}
/// <summary>
/// Field's constructor.
/// </summary>
/// <param name="name">Field name</param>
/// <param name="field_type">Field type</param>
/// <param name="idx_flags">Index types (hash/T-tree)</param>
/// <param name="ref_table">Reference table name for inverse reference fields</param>
/// <param name="inv_ref_field">Inverse reference field name</param>
public FastDbField(string name, CLI.FieldType field_type, CLI.FieldFlags idx_flags,
string ref_table, string inv_ref_field)
: base(name, field_type, idx_flags)
{
this.RefTable = ref_table;
this.InvRefField = inv_ref_field;
}
protected static unsafe void SetBufferTypeAndSize(CLI.UnmanagedBuffer* buf,
CLI.FieldType NewType, int NewSize, bool TypeCheck)
{
int n;
if (!TypeCheck || CLI.IsArrayType(NewType))
n = NewSize;
else if (NewType == CLI.FieldType.cli_asciiz || NewType == CLI.FieldType.cli_pasciiz)
n = NewSize+1;
else
n = CLI.SizeOfCliType[(int)NewType];
if (n > buf->capacity) {
buf->data = Marshal.ReAllocCoTaskMem(buf->data, ALIGN(n));
buf->capacity = n;
}
buf->size = n;
if (buf->type != (int)NewType)
buf->type = (int)NewType;
}
internal unsafe void CopyBufferData(CLI.FieldType type, int size, IntPtr data)
{
SetBufferTypeAndSize((CLI.UnmanagedBuffer*)buffer.ToPointer(), type, size, true);
Int64* pend = (Int64*)((byte*)data.ToPointer() + ALIGN(size));
Int64* pfrom = (Int64*)data.ToPointer();
Int64* pto = (Int64*)((CLI.UnmanagedBuffer*)buffer.ToPointer())->data.ToPointer();
while(pfrom < pend)
*pto++ = *pfrom++;
// for(int i=0; i < size; i++)
// *pto++ = *pfrom++;
// Note: buffers are always aligned to 8 bytes, so we can simply copy by
// iterating over 8 byte integers.
//if (type == CLI.FieldType.cli_asciiz || type == CLI.FieldType.cli_pasciiz)
// *pto = (byte)'\0';
}
