1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
// Copyright (C) 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2010-2015, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* file name: charstr.cpp
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* created on: 2010may19
* created by: Markus W. Scherer
*/
#include "unicode/utypes.h"
#include "charstr.h"
#include "cmemory.h"
#include "cstring.h"
#include "uinvchar.h"
U_NAMESPACE_BEGIN
CharString &CharString::copyFrom(const CharString &s, UErrorCode &errorCode) {
if(U_SUCCESS(errorCode) && this!=&s && ensureCapacity(s.len+1, 0, errorCode)) {
len=s.len;
uprv_memcpy(buffer.getAlias(), s.buffer.getAlias(), len+1);
}
return *this;
}
int32_t CharString::lastIndexOf(char c) const {
for(int32_t i=len; i>0;) {
if(buffer[--i]==c) {
return i;
}
}
return -1;
}
CharString &CharString::truncate(int32_t newLength) {
if(newLength<0) {
newLength=0;
}
if(newLength<len) {
buffer[len=newLength]=0;
}
return *this;
}
CharString &CharString::append(char c, UErrorCode &errorCode) {
if(ensureCapacity(len+2, 0, errorCode)) {
buffer[len++]=c;
buffer[len]=0;
}
return *this;
}
CharString &CharString::append(const char *s, int32_t sLength, UErrorCode &errorCode) {
if(U_FAILURE(errorCode)) {
return *this;
}
if(sLength<-1 || (s==NULL && sLength!=0)) {
errorCode=U_ILLEGAL_ARGUMENT_ERROR;
return *this;
}
if(sLength<0) {
sLength=uprv_strlen(s);
}
if(sLength>0) {
if(s==(buffer.getAlias()+len)) {
// The caller wrote into the getAppendBuffer().
if(sLength>=(buffer.getCapacity()-len)) {
// The caller wrote too much.
errorCode=U_INTERNAL_PROGRAM_ERROR;
} else {
buffer[len+=sLength]=0;
}
} else if(buffer.getAlias()<=s && s<(buffer.getAlias()+len) &&
sLength>=(buffer.getCapacity()-len)
) {
// (Part of) this string is appended to itself which requires reallocation,
// so we have to make a copy of the substring and append that.
return append(CharString(s, sLength, errorCode), errorCode);
} else if(ensureCapacity(len+sLength+1, 0, errorCode)) {
uprv_memcpy(buffer.getAlias()+len, s, sLength);
buffer[len+=sLength]=0;
}
}
return *this;
}
char *CharString::getAppendBuffer(int32_t minCapacity,
int32_t desiredCapacityHint,
int32_t &resultCapacity,
UErrorCode &errorCode) {
if(U_FAILURE(errorCode)) {
resultCapacity=0;
return NULL;
}
int32_t appendCapacity=buffer.getCapacity()-len-1; // -1 for NUL
if(appendCapacity>=minCapacity) {
resultCapacity=appendCapacity;
return buffer.getAlias()+len;
}
if(ensureCapacity(len+minCapacity+1, len+desiredCapacityHint+1, errorCode)) {
resultCapacity=buffer.getCapacity()-len-1;
return buffer.getAlias()+len;
}
resultCapacity=0;
return NULL;
}
CharString &CharString::appendInvariantChars(const UnicodeString &s, UErrorCode &errorCode) {
if(U_FAILURE(errorCode)) {
return *this;
}
if (!uprv_isInvariantUnicodeString(s)) {
errorCode = U_INVARIANT_CONVERSION_ERROR;
return *this;
}
if(ensureCapacity(len+s.length()+1, 0, errorCode)) {
len+=s.extract(0, 0x7fffffff, buffer.getAlias()+len, buffer.getCapacity()-len, US_INV);
}
return *this;
}
UBool CharString::ensureCapacity(int32_t capacity,
int32_t desiredCapacityHint,
UErrorCode &errorCode) {
if(U_FAILURE(errorCode)) {
return FALSE;
}
if(capacity>buffer.getCapacity()) {
if(desiredCapacityHint==0) {
desiredCapacityHint=capacity+buffer.getCapacity();
}
if( (desiredCapacityHint<=capacity || buffer.resize(desiredCapacityHint, len+1)==NULL) &&
buffer.resize(capacity, len+1)==NULL
) {
errorCode=U_MEMORY_ALLOCATION_ERROR;
return FALSE;
}
}
return TRUE;
}
CharString &CharString::appendPathPart(StringPiece s, UErrorCode &errorCode) {
if(U_FAILURE(errorCode)) {
return *this;
}
if(s.length()==0) {
return *this;
}
char c;
if(len>0 && (c=buffer[len-1])!=U_FILE_SEP_CHAR && c!=U_FILE_ALT_SEP_CHAR) {
append(U_FILE_SEP_CHAR, errorCode);
}
append(s, errorCode);
return *this;
}
CharString &CharString::ensureEndsWithFileSeparator(UErrorCode &errorCode) {
char c;
if(U_SUCCESS(errorCode) && len>0 &&
(c=buffer[len-1])!=U_FILE_SEP_CHAR && c!=U_FILE_ALT_SEP_CHAR) {
append(U_FILE_SEP_CHAR, errorCode);
}
return *this;
}
U_NAMESPACE_END
|
