/*-------------------------------------------------------------------------

 *

 * rmgrdesc_utils.c

 *    Support functions for rmgrdesc routines

 *

 * Copyright (c) 2023-2025, PostgreSQL Global Development Group

 *

 *

 * IDENTIFICATION

 *    src/backend/access/rmgrdesc/rmgrdesc_utils.c

 *

 *-------------------------------------------------------------------------

 */

#include "postgres.h"

#include "access/rmgrdesc_utils.h"

#include "storage/off.h"

/*

 * Helper function to print an array, in the format described in the

 * README.

 */

void

array_desc(StringInfo buf, void *array, size_t elem_size, int count,

       void (*elem_desc) (StringInfo buf, void *elem, void *data),

       void *data)

{

  if (count == 0)

  {

    appendStringInfoString(buf, " []");

    return;

  }

  appendStringInfoString(buf, " [");

  for (int i = 0; i < count; i++)

  {

    elem_desc(buf, (char *) array + elem_size * i, data);

    if (i < count - 1)

      appendStringInfoString(buf, ", ");

  }

  appendStringInfoChar(buf, ']');

}

void

offset_elem_desc(StringInfo buf, void *offset, void *data)

{

  appendStringInfo(buf, "%u", *(OffsetNumber *) offset);

}

void

redirect_elem_desc(StringInfo buf, void *offset, void *data)

{

  OffsetNumber *new_offset = (OffsetNumber *) offset;

  appendStringInfo(buf, "%u->%u", new_offset[0], new_offset[1]);

}

void

oid_elem_desc(StringInfo buf, void *relid, void *data)

{

  appendStringInfo(buf, "%u", *(Oid *) relid);

}