/*****************************************************************************
#   Copyright (C) 1994-2008 by David Gordon.
#   All rights reserved.                           
#                                                                           
#   This software is part of a beta-test version of the Consed/Autofinish
#   package.  It should not be redistributed or
#   used for any commercial purpose, including commercially funded
#   sequencing, without written permission from the author and the
#   University of Washington.
#   
#   This software is provided ``AS IS'' and any express or implied
#   warranties, including, but not limited to, the implied warranties of
#   merchantability and fitness for a particular purpose, are disclaimed.
#   In no event shall the authors or the University of Washington be
#   liable for any direct, indirect, incidental, special, exemplary, or
#   consequential damages (including, but not limited to, procurement of
#   substitute goods or services; loss of use, data, or profits; or
#   business interruption) however caused and on any theory of liability,
#   whether in contract, strict liability, or tort (including negligence
#   or otherwise) arising in any way out of the use of this software, even
#   if advised of the possibility of such damage.
#
#   Building Consed from source is error prone and not simple which is
#   why I provide executables.  Due to time limitations I cannot
#   provide any assistance in building Consed.  Even if you do not
#   modify the source, you may introduce errors due to using a
#   different version of the compiler, a different version of motif,
#   different versions of other libraries than I used, etc.  For this
#   reason, if you discover Consed bugs, I can only offer help with
#   those bugs if you first reproduce those bugs with an executable
#   provided by me--not an executable you have built.
# 
#   Modifying Consed is also difficult.  Although Consed is modular,
#   some modules are used by many other modules.  Thus making a change
#   in one place can have unforeseen effects on many other features.
#   It may takes months for you to notice these other side-effects
#   which may not seen connected at all.  It is not feasable for me to
#   provide help with modifying Consed sources because of the
#   potentially huge amount of time involved.
#
#*****************************************************************************/
#ifndef trimWhitespace_included
#define trimWhitespace_included


inline void trimWhitespace( char* szString ) {

   // first trim the end

   int nLength = strlen( szString );

   // case in which the string is null
   if ( nLength == 0 ) return;

   // first trim the end of the string

   char* ptr = szString + nLength - 1; // last character

   while( isspace( *ptr ) && ( szString <= ptr ) )
      --ptr;

   *( ptr + 1 ) = '\0';

   nLength = strlen( szString );

   // case in which the entire string is whitespace
   if ( nLength == 0 ) return;

   // this is not necessary because we know that the string
   // is not all whitespace or else it would now be of zero length.
   //   char* pLastChar = szString + nLength - 1; 

   // now trim the beginning of the string

   // find first non-space character
   //for( ptr = szString; isspace( *ptr) && ptr <= pLastChar; ++ptr );
   for( ptr = szString; isspace( *ptr); ++ptr );

   // *ptr must be not a space

   if ( ptr != szString ) {
      // this will copy the null and then terminate--see p.402 of
      // P.J. Plauger
      for( char* ptr1 = szString; (*ptr1++ = *ptr++) != '\0'; );

   }      
}   

#endif