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
174
175
176
177
178
179
180
|
/*
*******************************************************************************
*
* Copyright (C) 1999-2014, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: unistr_case.cpp
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:2
*
* created on: 2004aug19
* created by: Markus W. Scherer
*
* Case-mapping functions moved here from unistr.cpp
*/
#include "unicode/utypes.h"
#include "unicode/putil.h"
#include "cstring.h"
#include "cmemory.h"
#include "unicode/ustring.h"
#include "unicode/unistr.h"
#include "unicode/uchar.h"
#include "uelement.h"
#include "ustr_imp.h"
U_NAMESPACE_BEGIN
//========================================
// Read-only implementation
//========================================
int8_t
UnicodeString::doCaseCompare(int32_t start,
int32_t length,
const UChar *srcChars,
int32_t srcStart,
int32_t srcLength,
uint32_t options) const
{
// compare illegal string values
// treat const UChar *srcChars==NULL as an empty string
if(isBogus()) {
return -1;
}
// pin indices to legal values
pinIndices(start, length);
if(srcChars == NULL) {
srcStart = srcLength = 0;
}
// get the correct pointer
const UChar *chars = getArrayStart();
chars += start;
if(srcStart!=0) {
srcChars += srcStart;
}
if(chars != srcChars) {
UErrorCode errorCode=U_ZERO_ERROR;
int32_t result=u_strcmpFold(chars, length, srcChars, srcLength,
options|U_COMPARE_IGNORE_CASE, &errorCode);
if(result!=0) {
return (int8_t)(result >> 24 | 1);
}
} else {
// get the srcLength if necessary
if(srcLength < 0) {
srcLength = u_strlen(srcChars + srcStart);
}
if(length != srcLength) {
return (int8_t)((length - srcLength) >> 24 | 1);
}
}
return 0;
}
//========================================
// Write implementation
//========================================
UnicodeString &
UnicodeString::caseMap(const UCaseMap *csm,
UStringCaseMapper *stringCaseMapper) {
if(isEmpty() || !isWritable()) {
// nothing to do
return *this;
}
// We need to allocate a new buffer for the internal string case mapping function.
// This is very similar to how doReplace() keeps the old array pointer
// and deletes the old array itself after it is done.
// In addition, we are forcing cloneArrayIfNeeded() to always allocate a new array.
UChar oldStackBuffer[US_STACKBUF_SIZE];
UChar *oldArray;
int32_t oldLength;
if(fUnion.fFields.fLengthAndFlags&kUsingStackBuffer) {
// copy the stack buffer contents because it will be overwritten
oldArray = oldStackBuffer;
oldLength = getShortLength();
u_memcpy(oldStackBuffer, fUnion.fStackFields.fBuffer, oldLength);
} else {
oldArray = getArrayStart();
oldLength = length();
}
int32_t capacity;
if(oldLength <= US_STACKBUF_SIZE) {
capacity = US_STACKBUF_SIZE;
} else {
capacity = oldLength + 20;
}
int32_t *bufferToDelete = 0;
if(!cloneArrayIfNeeded(capacity, capacity, FALSE, &bufferToDelete, TRUE)) {
return *this;
}
// Case-map, and if the result is too long, then reallocate and repeat.
UErrorCode errorCode;
int32_t newLength;
do {
errorCode = U_ZERO_ERROR;
newLength = stringCaseMapper(csm, getArrayStart(), getCapacity(),
oldArray, oldLength, &errorCode);
setLength(newLength);
} while(errorCode==U_BUFFER_OVERFLOW_ERROR && cloneArrayIfNeeded(newLength, newLength, FALSE));
if (bufferToDelete) {
uprv_free(bufferToDelete);
}
if(U_FAILURE(errorCode)) {
setToBogus();
}
return *this;
}
UnicodeString &
UnicodeString::foldCase(uint32_t options) {
UCaseMap csm=UCASEMAP_INITIALIZER;
csm.csp=ucase_getSingleton();
csm.options=options;
return caseMap(&csm, ustrcase_internalFold);
}
U_NAMESPACE_END
// Defined here to reduce dependencies on break iterator
U_CAPI int32_t U_EXPORT2
uhash_hashCaselessUnicodeString(const UElement key) {
U_NAMESPACE_USE
const UnicodeString *str = (const UnicodeString*) key.pointer;
if (str == NULL) {
return 0;
}
// Inefficient; a better way would be to have a hash function in
// UnicodeString that does case folding on the fly.
UnicodeString copy(*str);
return copy.foldCase().hashCode();
}
// Defined here to reduce dependencies on break iterator
U_CAPI UBool U_EXPORT2
uhash_compareCaselessUnicodeString(const UElement key1, const UElement key2) {
U_NAMESPACE_USE
const UnicodeString *str1 = (const UnicodeString*) key1.pointer;
const UnicodeString *str2 = (const UnicodeString*) key2.pointer;
if (str1 == str2) {
return TRUE;
}
if (str1 == NULL || str2 == NULL) {
return FALSE;
}
return str1->caseCompare(*str2, U_FOLD_CASE_DEFAULT) == 0;
}
|
