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  • Committer: Package Import Robot
  • Author(s): Marc Deslauriers
  • Date: 2012-02-22 14:16:05 UTC
  • mto: This revision was merged to the branch mainline in revision 20.
  • Revision ID: package-import@ubuntu.com-20120222141605-nxlu9yzc6attylc2
Tags: upstream-5.1.61
Import upstream version 5.1.61

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storage/innodb_plugin/include/rem0rec.ic
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/*****************************************************************************
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Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved.
 
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Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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#include "mach0data.h"
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#include "ut0byte.h"
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#include "dict0dict.h"
 
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#include "btr0types.h"
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/* Compact flag ORed to the extra size returned by rec_get_offsets() */
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#define REC_OFFS_COMPACT        ((ulint) 1 << 31)
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        return(UNIV_UNLIKELY(*rec_offs_base(offsets) & REC_OFFS_EXTERNAL));
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}
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#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG
 
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/******************************************************//**
 
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Determine if the offsets are for a record containing null BLOB pointers.
 
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@return first field containing a null BLOB pointer, or NULL if none found */
 
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UNIV_INLINE
 
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const byte*
 
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rec_offs_any_null_extern(
 
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/*=====================*/
 
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        const rec_t*    rec,            /*!< in: record */
 
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        const ulint*    offsets)        /*!< in: rec_get_offsets(rec) */
 
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{
 
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        ulint   i;
 
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        ut_ad(rec_offs_validate(rec, NULL, offsets));
 
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        if (!rec_offs_any_extern(offsets)) {
 
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                return(NULL);
 
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        }
 
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        for (i = 0; i < rec_offs_n_fields(offsets); i++) {
 
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                if (rec_offs_nth_extern(offsets, i)) {
 
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                        ulint           len;
 
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                        const byte*     field
 
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                                = rec_get_nth_field(rec, offsets, i, &len);
 
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                        ut_a(len >= BTR_EXTERN_FIELD_REF_SIZE);
 
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                        if (!memcmp(field + len
 
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                                    - BTR_EXTERN_FIELD_REF_SIZE,
 
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                                    field_ref_zero,
 
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                                    BTR_EXTERN_FIELD_REF_SIZE)) {
 
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                                return(field);
 
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                        }
 
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                }
 
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        }
 
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        return(NULL);
 
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}
 
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#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */
 
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/******************************************************//**
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Returns nonzero if the extern bit is set in nth field of rec.
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@return nonzero if externally stored */