kc3-lang/gnulib/lib/trim.c

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• Hash : 0631ee73
  Author :
  Date : 2006-09-05T12:32:42
  

  New 'trim' module, from Davide Angelocola <davide.angelocola@tiscali.it>.
  

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• lib/trim.c

• /* Removes leading and/or trailing whitespaces
     Copyright (C) 2006 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2, or (at your option)
     any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; see the file COPYING.
     If not, write to the Free Software Foundation,
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  
  /* Written by Davide Angelocola <davide.angelocola@gmail.com> */
  
  #ifdef HAVE_CONFIG_H
  # include <config.h>
  #endif
  
  #if HAVE_MBRTOWC 
  # include <stddef.h>
  # include "mbchar.h"
  # include "mbiter.h"
  # include "mbuiter.h"		/* FIXME: for MB_CUR_MAX */
  #else
  # include <ctype.h>
  #endif
  
  #include "xalloc.h"
  #include "trim.h"
  
  char *
  trim2(const char *s, int how)
  {
    char *d;
      
    d = strdup(s);
  
    if (!d)
      xalloc_die();
    
  #if HAVE_MBRTOWC
    if (MB_CUR_MAX > 1)
      {
        mbi_iterator_t i;
        
        /* Trim leading whitespaces. */
        if (how != TRIM_TRAILING) 
  	{
  	  mbi_init (i, d, strlen (d));
        
  	  for (; mbi_avail (i) && mb_isspace (mbi_cur (i)); mbi_advance (i))
  	    ;
  	  
  	  memmove (d, mbi_cur_ptr (i), strlen (mbi_cur_ptr (i)) + 1);
  	}
    
        /* Trim trailing whitespaces. */
        if (how != TRIM_LEADING) 
  	{
  	  int state = 0;
  	  char *r;
  	  
  	  mbi_init (i, d, strlen (d));
  
  	  for (; mbi_avail (i); mbi_advance (i)) 
  	    {
  	      if (state == 0 && mb_isspace (mbi_cur (i))) 
  		{
  		  state = 0;
  		  continue;
  		}
  	      
  	      if (state == 0 && !mb_isspace (mbi_cur (i)))
  		{
  		  state = 1;
  		  continue;
  		}
  	      
  	      if (state == 1 && !mb_isspace (mbi_cur (i)))
  		{
  		  state = 1;
  		  continue;
  		}
  	      
  	      if (state == 1 && mb_isspace (mbi_cur (i))) 
  		{
  		  state = 2;
  		  r = (char *) mbi_cur_ptr (i);
  		}
  	      else if (state == 2 && mb_isspace (mbi_cur (i))) 
  		{
  		  state = 2;
  		} 
  	      else 
  		{
  		  state = 1;
  		}
  	    }
  	  
  	  if (state == 2) 
  	    *r = '\0';
  	}
      }
    else
  #endif /* HAVE_MBRTOWC */
      {
        char *p;
        
        /* Trim leading whitespaces. */
        if (how != TRIM_TRAILING) {
  	for (p = d; *p && isspace (*p); p++)
  	  ;			
  
  	memmove (d, p, strlen (p) + 1);
        }
  
        /* Trim trailing whitespaces. */
        if (how != TRIM_LEADING) {
  	for (p = d + strlen (d) - 1; p >= d && isspace (*p); p--)
  	  *p = '\0';
        }
      }
    
    return d;
  }
    
  

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