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Viewing changes to src/backend/storage/smgr/smgrtype.c

  • Committer: alvherre
  • Date: 2005-12-16 21:24:52 UTC
  • Revision ID: svn-v4:db760fc0-0f08-0410-9d63-cc6633f64896:trunk:1
Initial import of the REL8_0_3 sources from the Pgsql CVS repository.

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src/backend/storage/smgr/smgrtype.c
 
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/*-------------------------------------------------------------------------
 
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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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}