postgres_ext.h

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/*-------------------------------------------------------------------------
 *
 * postgres_ext.h
 *
 *     This file contains declarations of things that are visible everywhere
 *  in PostgreSQL *and* are visible to clients of frontend interface libraries.
 *  For example, the Oid type is part of the API of libpq and other libraries.
 *
 *     Declarations which are specific to a particular interface should
 *  go in the header file for that interface (such as libpq-fe.h).  This
 *  file is only for fundamental Postgres declarations.
 *
 *     User-written C functions don't count as "external to Postgres."
 *  Those function much as local modifications to the backend itself, and
 *  use header files that are otherwise internal to Postgres to interface
 *  with the backend.
 *
 * src/include/postgres_ext.h
 *
 *-------------------------------------------------------------------------
 */
 
#ifndef POSTGRES_EXT_H
#define POSTGRES_EXT_H
 
#include "pg_config_ext.h"
 
/*
 * Object ID is a fundamental type in Postgres.
 */
typedef unsigned int Oid;
 
#ifdef __cplusplus
#define InvalidOid      (Oid(0))
#else
#define InvalidOid      ((Oid) 0)
#endif
 
#define OID_MAX  UINT_MAX
/* you will need to include <limits.h> to use the above #define */
 
#define atooid(x) ((Oid) strtoul((x), NULL, 10))
/* the above needs <stdlib.h> */
 
 
/* Define a signed 64-bit integer type for use in client API declarations. */
typedef PG_INT64_TYPE pg_int64;
 
 
#endif                          /* POSTGRES_EXT_H */