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Viewing changes to drizzled/user_var_entry.cc

  • Committer: Brian Aker
  • Date: 2009-07-10 01:49:29 UTC
  • mto: (1090.1.1 staging)
  • mto: This revision was merged to the branch mainline in revision 1091.
  • Revision ID: brian@gaz-20090710014929-v8pmvf7woqkld9iv
Cleanup of user_var

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Lines of Context:
drizzled/user_var_entry.cc
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  }
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  return(val);
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}
 
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/**
 
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  Set value to user variable.
 
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  @param entry          pointer to structure representing variable
 
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  @param set_null       should we set NULL value ?
 
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  @param ptr            pointer to buffer with new value
 
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  @param length         length of new value
 
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  @param type           type of new value
 
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  @param cs             charset info for new value
 
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  @param dv             derivation for new value
 
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  @param unsigned_arg   indiates if a value of type INT_RESULT is unsigned
 
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  @note Sets error and fatal error if allocation fails.
 
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  @retval
 
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    false   success
 
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  @retval
 
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    true    failure
 
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*/
 
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#define extra_size sizeof(double)
 
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bool user_var_entry::update_hash(bool set_null, void *ptr, uint32_t arg_length,
 
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                                 Item_result arg_type, const CHARSET_INFO * const cs, Derivation dv,
 
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                                 bool unsigned_arg)
 
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{
 
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  if (set_null)
 
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  {
 
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    if (value)
 
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    {
 
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      assert(length && size);
 
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      free(value);
 
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      value= NULL;
 
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      length= 0;
 
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      size= 0;
 
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    }
 
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  }
 
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  else
 
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  {
 
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    size_t needed_size= arg_length + ((arg_type == STRING_RESULT) ? 1 : 0);
 
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    if (needed_size > size)
 
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    {
 
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      char *new_ptr;
 
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      new_ptr= (char *)realloc(value, needed_size);
 
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      if (new_ptr == NULL)
 
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        return true;
 
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      value= new_ptr;
 
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      size= needed_size;
 
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    }
 
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    if (arg_type == STRING_RESULT)
 
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      value[arg_length]= 0;                     // Store end \0
 
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    memcpy(value, ptr, arg_length);
 
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    if (arg_type == DECIMAL_RESULT)
 
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      ((my_decimal*)value)->fix_buffer_pointer();
 
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    length= arg_length;
 
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    collation.set(cs, dv);
 
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    unsigned_flag= unsigned_arg;
 
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  }
 
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  type= arg_type;
 
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  return false;
 
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}