/src/icu/source/common/unistr_props.cpp
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1 | | // © 2016 and later: Unicode, Inc. and others. |
2 | | // License & terms of use: http://www.unicode.org/copyright.html |
3 | | /* |
4 | | ******************************************************************************* |
5 | | * |
6 | | * Copyright (C) 1999-2011, International Business Machines |
7 | | * Corporation and others. All Rights Reserved. |
8 | | * |
9 | | ******************************************************************************* |
10 | | * file name: unistr_props.cpp |
11 | | * encoding: UTF-8 |
12 | | * tab size: 8 (not used) |
13 | | * indentation:2 |
14 | | * |
15 | | * created on: 2004aug25 |
16 | | * created by: Markus W. Scherer |
17 | | * |
18 | | * Character property dependent functions moved here from unistr.cpp |
19 | | */ |
20 | | |
21 | | #include "unicode/utypes.h" |
22 | | #include "unicode/uchar.h" |
23 | | #include "unicode/unistr.h" |
24 | | #include "unicode/utf16.h" |
25 | | |
26 | | U_NAMESPACE_BEGIN |
27 | | |
28 | | UnicodeString& |
29 | | UnicodeString::trim() |
30 | 0 | { |
31 | 0 | if(isBogus()) { |
32 | 0 | return *this; |
33 | 0 | } |
34 | | |
35 | 0 | UChar *array = getArrayStart(); |
36 | 0 | UChar32 c; |
37 | 0 | int32_t oldLength = this->length(); |
38 | 0 | int32_t i = oldLength, length; |
39 | | |
40 | | // first cut off trailing white space |
41 | 0 | for(;;) { |
42 | 0 | length = i; |
43 | 0 | if(i <= 0) { |
44 | 0 | break; |
45 | 0 | } |
46 | 0 | U16_PREV(array, 0, i, c); |
47 | 0 | if(!(c == 0x20 || u_isWhitespace(c))) { |
48 | 0 | break; |
49 | 0 | } |
50 | 0 | } |
51 | 0 | if(length < oldLength) { |
52 | 0 | setLength(length); |
53 | 0 | } |
54 | | |
55 | | // find leading white space |
56 | 0 | int32_t start; |
57 | 0 | i = 0; |
58 | 0 | for(;;) { |
59 | 0 | start = i; |
60 | 0 | if(i >= length) { |
61 | 0 | break; |
62 | 0 | } |
63 | 0 | U16_NEXT(array, i, length, c); |
64 | 0 | if(!(c == 0x20 || u_isWhitespace(c))) { |
65 | 0 | break; |
66 | 0 | } |
67 | 0 | } |
68 | | |
69 | | // move string forward over leading white space |
70 | 0 | if(start > 0) { |
71 | 0 | doReplace(0, start, 0, 0, 0); |
72 | 0 | } |
73 | |
|
74 | 0 | return *this; |
75 | 0 | } |
76 | | |
77 | | U_NAMESPACE_END |