strip.c

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/*!
   \file lib/db/dbmi_base/strip.c
 
   \brief DBMI Library (base) - strip strings
 
   (C) 1999-2009, 2011 by the GRASS Development Team
 
   This program is free software under the GNU General Public License
   (>=v2). Read the file COPYING that comes with GRASS for details.
 
   \author Joel Jones (CERL/UIUC), Radim Blazek
   \author Doxygenized by Martin Landa <landa.martin gmail.com> (2011)
 */
 
#include <grass/dbmi.h>
 
/*!
   \brief Strip given string
 
   'buf' is rewritten in place with leading and trailing white
   space removed.
 
   \param buf string buffer
 */
void db_strip(char *buf)
{
    char *a, *b;
 
    /* remove leading white space */
    for (a = b = buf; *a == ' ' || *a == '\t'; a++)
        ;
    if (a != b)
        while ((*b++ = *a++))
            ;
 
    /* remove trailing white space */
    for (a = buf; *a; a++)
        ;
    if (a != buf) {
        for (a--; *a == ' ' || *a == '\t'; a--)
            ;
        a++;
        *a = 0;
    }
}