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Viewing changes to storage/heap/hp_rrnd.c

  • Committer: Monty Taylor
  • Date: 2008-08-02 00:06:32 UTC
  • mto: (236.1.42 codestyle)
  • mto: This revision was merged to the branch mainline in revision 261.
  • Revision ID: monty@inaugust.com-20080802000632-jsse0zdd9r6ic5ku
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storage/heap/hp_rrnd.c
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/* Read a record from a random position */
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#include "heap_priv.h"
 
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#include "heapdef.h"
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/*
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           Returns one of following values:
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           HA_ERR_END_OF_FILE = EOF.
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*/
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int heap_rrnd(register HP_INFO *info, unsigned char *record, unsigned char *pos)
 
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int heap_rrnd(register HP_INFO *info, uchar *record, uchar *pos)
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{
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  HP_SHARE *share=info->getShare();
 
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  HP_SHARE *share=info->s;
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  info->lastinx= -1;
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  if (!(info->current_ptr= pos))
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  {
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    info->update= 0;
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    return(errno= HA_ERR_END_OF_FILE);
 
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    return(my_errno= HA_ERR_END_OF_FILE);
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  }
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  if (get_chunk_status(&share->recordspace, info->current_ptr) != CHUNK_STATUS_ACTIVE)
 
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  if (!info->current_ptr[share->reclength])
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  {
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    /* treat deleted and linked chunks as deleted */
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    info->update= HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND;
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    return(errno=HA_ERR_RECORD_DELETED);
 
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    return(my_errno=HA_ERR_RECORD_DELETED);
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  }
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  info->update=HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND | HA_STATE_AKTIV;
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  hp_extract_record(share, record, info->current_ptr);
 
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  memcpy(record,info->current_ptr,(size_t) share->reclength);
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  info->current_hash_ptr=0;                     /* Can't use rnext */
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  return(0);
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} /* heap_rrnd */
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           HA_ERR_END_OF_FILE = EOF.
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*/
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int heap_rrnd_old(register HP_INFO *info, unsigned char *record, uint32_t pos)
 
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int heap_rrnd_old(register HP_INFO *info, uchar *record, ulong pos)
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{
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  HP_SHARE *share=info->s;
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asdfasdf;
 
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  info->lastinx= -1;
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  if (pos == (uint32_t) -1)
 
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  if (pos == (ulong) -1)
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  {
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    pos= ++info->current_record;
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    if (pos % share->block.records_in_block &&  /* Quick next record */
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      pos < share->used_chunk_count+share->deleted_chunk_count &&
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            (info->update & HA_STATE_PREV_FOUND))
 
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        pos < share->records+share->deleted &&
 
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        (info->update & HA_STATE_PREV_FOUND))
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    {
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      info->current_ptr+=share->block.recbufferlen;
 
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      info->current_ptr+=share->block.recbuffer;
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      goto end;
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    }
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  }
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  else
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    info->current_record=pos;
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  if (pos >= share->used_chunk_count+share->deleted_chunk_count)
 
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  if (pos >= share->records+share->deleted)
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  {
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    info->update= 0;
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    return(errno= HA_ERR_END_OF_FILE);
 
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    return(my_errno= HA_ERR_END_OF_FILE);
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  }
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        /* Find record number pos */
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  if (!info->current_ptr[share->reclength])
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  {
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    info->update= HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND;
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    return(errno=HA_ERR_RECORD_DELETED);
 
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    return(my_errno=HA_ERR_RECORD_DELETED);
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  }
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  info->update=HA_STATE_PREV_FOUND | HA_STATE_NEXT_FOUND | HA_STATE_AKTIV;
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  memcpy(record,info->current_ptr,(size_t) share->reclength);