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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 1999-2011, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: unistr_props.cpp
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:2
*
* created on: 2004aug25
* created by: Markus W. Scherer
*
* Character property dependent functions moved here from unistr.cpp
*/
#include "unicode/utypes.h"
#include "unicode/uchar.h"
#include "unicode/unistr.h"
#include "unicode/utf16.h"
U_NAMESPACE_BEGIN
UnicodeString&
UnicodeString::trim()
{
if(isBogus()) {
return *this;
}
UChar *array = getArrayStart();
UChar32 c;
int32_t oldLength = this->length();
int32_t i = oldLength, length;
// first cut off trailing white space
for(;;) {
length = i;
if(i <= 0) {
break;
}
U16_PREV(array, 0, i, c);
if(!(c == 0x20 || u_isWhitespace(c))) {
break;
}
}
if(length < oldLength) {
setLength(length);
}
// find leading white space
int32_t start;
i = 0;
for(;;) {
start = i;
if(i >= length) {
break;
}
U16_NEXT(array, i, length, c);
if(!(c == 0x20 || u_isWhitespace(c))) {
break;
}
}
// move string forward over leading white space
if(start > 0) {
doReplace(0, start, 0, 0, 0);
}
return *this;
}
U_NAMESPACE_END