source: vbox/trunk/src/VBox/Runtime/common/string/strstrip.cpp

/* $Id: strstrip.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
/** @file
 * IPRT - String Stripping and Trimming.
 */

/*
 * Copyright (C) 2006-2024 Oracle and/or its affiliates.
 *
 * This file is part of VirtualBox base platform packages, as
 * available from https://www.virtualbox.org.
 *
 * 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, in version 3 of the
 * License.
 *
 * 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; if not, see <https://www.gnu.org/licenses>.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
 * in the VirtualBox distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 *
 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#include <iprt/string.h>
#include "internal/iprt.h"

#include <iprt/ctype.h>
#include <iprt/string.h>


/**
 * Strips blankspaces from both ends of the string.
 *
 * @returns Pointer to first non-blank char in the string.
 * @param   psz     The string to strip.
 */
RTDECL(char *) RTStrStrip(char *psz)
{
    /* left */
    while (RT_C_IS_SPACE(*psz))
        psz++;

    /* right */
    char *pszEnd = strchr(psz, '\0');
    while (--pszEnd > psz && RT_C_IS_SPACE(*pszEnd))
        *pszEnd = '\0';

    return psz;
}
RT_EXPORT_SYMBOL(RTStrStrip);


/**
 * Strips blankspaces from the start of the string.
 *
 * @returns Pointer to first non-blank char in the string.
 * @param   psz     The string to strip.
 */
RTDECL(char *) RTStrStripL(const char *psz)
{
    /* left */
    while (RT_C_IS_SPACE(*psz))
        psz++;

    return (char *)psz;
}
RT_EXPORT_SYMBOL(RTStrStripL);


/**
 * Strips blankspaces from the end of the string.
 *
 * @returns psz.
 * @param   psz     The string to strip.
 */
RTDECL(char *) RTStrStripR(char *psz)
{
    /* right */
    char *pszEnd = strchr(psz, '\0');
    while (--pszEnd > psz && RT_C_IS_SPACE(*pszEnd))
        *pszEnd = '\0';

    return psz;
}
RT_EXPORT_SYMBOL(RTStrStripR);