/*
 * Copyright 2023, Andrew Lindesay <apl@lindesay.co.nz>.
 * All rights reserved. Distributed under the terms of the MIT License.
 */

#include "StringUtils.h"


/*static*/ void
StringUtils::InSituTrimSpaceAndControl(BString& value)
{
        int i = 0;
        int len = value.Length();

        while (i < len && _IsSpaceOrControl(value.ByteAt(i)))
                i ++;

        if (i != 0)
                value.Remove(0, i);

        len = value.Length();
        i = len - 1;

        while (i > 0 && _IsSpaceOrControl(value.ByteAt(i)))
                i --;

        if (i != (len - 1))
                value.Remove(i + 1, (len - (i + 1)));
}


/*static*/ void
StringUtils::InSituStripSpaceAndControl(BString& value)
{
        for (int i = value.Length() - 1; i >= 0; i--) {
                if (_IsSpaceOrControl(value.ByteAt(i)))
                        value.Remove(i, 1);
        }
}


/*static*/ int
StringUtils::NullSafeCompare(const char* s1, const char* s2)
{
        if ((NULL == s1) && (NULL == s2))
                return 0;
        if (NULL == s1)
                return 1;
        if (NULL == s2)
                return -1;
        return strcmp(s1, s2);
}


/*static*/ bool
StringUtils::_IsSpaceOrControl(char ch)
{
        return ch <= 32;
}