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Viewing changes to storage/myisam/mi_checksum.c

  • Committer: Stewart Smith
  • Date: 2008-07-13 06:56:15 UTC
  • mto: (210.1.1 drizzle)
  • mto: This revision was merged to the branch mainline in revision 211.
  • Revision ID: stewart@flamingspork.com-20080713065615-vzok75kgnnviokl9
Move MD5() into a UDF

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storage/myisam/mi_checksum.c
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/* Calculate a checksum for a row */
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#include "myisam_priv.h"
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using namespace drizzled;
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internal::ha_checksum mi_checksum(MI_INFO *info, const unsigned char *buf)
 
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#include "myisamdef.h"
 
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ha_checksum mi_checksum(MI_INFO *info, const uchar *buf)
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{
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  uint32_t i;
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  internal::ha_checksum crc=0;
 
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  uint i;
 
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  ha_checksum crc=0;
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  MI_COLUMNDEF *rec=info->s->rec;
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  for (i=info->s->base.fields ; i-- ; buf+=(rec++)->length)
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  {
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    const unsigned char *pos;
 
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    const uchar *pos;
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    ulong length;
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    switch (rec->type) {
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    case FIELD_BLOB:
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      length=_mi_calc_blob_length(rec->length-
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                                        portable_sizeof_char_ptr,
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                                        buf);
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      memcpy(&pos, buf+rec->length - portable_sizeof_char_ptr, sizeof(char*));
 
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      memcpy((char*) &pos, buf+rec->length- portable_sizeof_char_ptr,
 
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             sizeof(char*));
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      break;
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    }
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    case FIELD_VARCHAR:
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    {
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      uint32_t pack_length= HA_VARCHAR_PACKLENGTH(rec->length-1);
 
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      uint pack_length= HA_VARCHAR_PACKLENGTH(rec->length-1);
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      if (pack_length == 1)
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        length= (ulong) *(unsigned char*) buf;
 
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        length= (ulong) *(uchar*) buf;
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      else
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        length= uint2korr(buf);
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      pos= buf+pack_length;
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      pos=buf;
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      break;
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    }
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    crc=internal::my_checksum(crc, pos ? pos : (unsigned char*) "", length);
 
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    crc=my_checksum(crc, pos ? pos : (uchar*) "", length);
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  }
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  return crc;
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}
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internal::ha_checksum mi_static_checksum(MI_INFO *info, const unsigned char *pos)
 
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ha_checksum mi_static_checksum(MI_INFO *info, const uchar *pos)
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{
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  return internal::my_checksum(0, pos, info->s->base.reclength);
 
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  return my_checksum(0, pos, info->s->base.reclength);
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}