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  • Committer: Monty Taylor
  • Date: 2009-04-14 19:16:51 UTC
  • mto: (997.2.5 mordred)
  • mto: This revision was merged to the branch mainline in revision 994.
  • Revision ID: mordred@inaugust.com-20090414191651-ltbww6hpqks8k7qk
Clarified instructions in README.

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drizzled/function/str/trim.cc
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#include "config.h"
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#include <drizzled/server_includes.h>
 
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#include CSTDINT_H
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#include <drizzled/function/str/trim.h>
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namespace drizzled
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{
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String *Item_func_ltrim::val_str(String *str)
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{
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  assert(fixed == 1);
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  ptr= (char*) res->ptr();
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  end= ptr+res->length();
 
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#ifdef USE_MB
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  char *p=ptr;
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  register uint32_t l;
 
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#endif
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  if (remove_length == 1)
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  {
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    char chr=(*remove_str)[0];
 
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#ifdef USE_MB
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    if (use_mb(res->charset()))
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    {
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      while (ptr < end)
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      {
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        if ((l=my_ismbchar(res->charset(), ptr,end))) ptr+=l,p=ptr;
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        else ++ptr;
 
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        if ((l=my_ismbchar(res->charset(), ptr,end))) ptr+=l,p=ptr;
 
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        else ++ptr;
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      }
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      ptr=p;
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    }
 
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#endif
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    while (ptr != end  && end[-1] == chr)
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      end--;
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  }
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  else
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  {
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    const char *r_ptr=remove_str->ptr();
 
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#ifdef USE_MB
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    if (use_mb(res->charset()))
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    {
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loop:
 
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  loop:
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      while (ptr + remove_length < end)
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      {
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        if ((l=my_ismbchar(res->charset(), ptr,end))) ptr+=l;
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        else ++ptr;
 
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        if ((l=my_ismbchar(res->charset(), ptr,end))) ptr+=l;
 
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        else ++ptr;
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      }
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      if (ptr + remove_length == end && !memcmp(ptr,r_ptr,remove_length))
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      {
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        end-=remove_length;
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        ptr=p;
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        goto loop;
 
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        end-=remove_length;
 
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        ptr=p;
 
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        goto loop;
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      }
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    }
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    else
 
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#endif /* USE_MB */
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    {
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      while (ptr + remove_length <= end &&
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          !memcmp(end-remove_length, r_ptr, remove_length))
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        end-=remove_length;
 
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             !memcmp(end-remove_length, r_ptr, remove_length))
 
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        end-=remove_length;
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    }
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  }
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  if (end == res->ptr()+res->length())
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  r_ptr= remove_str->ptr();
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  while (ptr+remove_length <= end && !memcmp(ptr,r_ptr,remove_length))
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    ptr+=remove_length;
 
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#ifdef USE_MB
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  if (use_mb(res->charset()))
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  {
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    char *p=ptr;
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    ptr=p;
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  }
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  else
 
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#endif /* USE_MB */
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  {
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    while (ptr + remove_length <= end &&
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           !memcmp(end-remove_length,r_ptr,remove_length))
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  args[0]->print(str, query_type);
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  str->append(')');
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}
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} /* namespace drizzled */