80 lines
1.5 KiB
C
80 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* smgrtype.c
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* storage manager type
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/storage/smgr/smgrtype.c,v 1.26 2004/12/31 22:01:13 pgsql Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "storage/smgr.h"
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typedef struct smgrid
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{
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const char *smgr_name;
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} smgrid;
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/*
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* StorageManager[] -- List of defined storage managers.
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*/
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static const smgrid StorageManager[] = {
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{"magnetic disk"}
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};
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static const int NStorageManagers = lengthof(StorageManager);
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Datum
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smgrin(PG_FUNCTION_ARGS)
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{
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char *s = PG_GETARG_CSTRING(0);
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int16 i;
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for (i = 0; i < NStorageManagers; i++)
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{
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if (strcmp(s, StorageManager[i].smgr_name) == 0)
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PG_RETURN_INT16(i);
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}
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elog(ERROR, "unrecognized storage manager name \"%s\"", s);
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PG_RETURN_INT16(0);
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}
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Datum
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smgrout(PG_FUNCTION_ARGS)
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{
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int16 i = PG_GETARG_INT16(0);
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char *s;
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if (i >= NStorageManagers || i < 0)
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elog(ERROR, "invalid storage manager id: %d", i);
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s = pstrdup(StorageManager[i].smgr_name);
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PG_RETURN_CSTRING(s);
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}
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Datum
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smgreq(PG_FUNCTION_ARGS)
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{
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int16 a = PG_GETARG_INT16(0);
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int16 b = PG_GETARG_INT16(1);
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PG_RETURN_BOOL(a == b);
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}
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Datum
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smgrne(PG_FUNCTION_ARGS)
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{
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int16 a = PG_GETARG_INT16(0);
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int16 b = PG_GETARG_INT16(1);
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PG_RETURN_BOOL(a != b);
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}
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