b64df2bf74
HarfBuzz: Update to version 7.3.0 ICU4C: Update to version 73.1 FreeType: Update to version 2.13.0
251 lines
8.0 KiB
C++
251 lines
8.0 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
*******************************************************************************
|
|
*
|
|
* Copyright (C) 1999-2014, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*
|
|
*******************************************************************************
|
|
* file name: unistr_case.cpp
|
|
* encoding: UTF-8
|
|
* 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/brkiter.h"
|
|
#include "unicode/casemap.h"
|
|
#include "unicode/edits.h"
|
|
#include "unicode/putil.h"
|
|
#include "cstring.h"
|
|
#include "cmemory.h"
|
|
#include "unicode/ustring.h"
|
|
#include "unicode/unistr.h"
|
|
#include "unicode/uchar.h"
|
|
#include "uassert.h"
|
|
#include "ucasemap_imp.h"
|
|
#include "uelement.h"
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
//========================================
|
|
// Read-only implementation
|
|
//========================================
|
|
|
|
int8_t
|
|
UnicodeString::doCaseCompare(int32_t start,
|
|
int32_t length,
|
|
const char16_t *srcChars,
|
|
int32_t srcStart,
|
|
int32_t srcLength,
|
|
uint32_t options) const
|
|
{
|
|
// compare illegal string values
|
|
// treat const char16_t *srcChars==nullptr as an empty string
|
|
if(isBogus()) {
|
|
return -1;
|
|
}
|
|
|
|
// pin indices to legal values
|
|
pinIndices(start, length);
|
|
|
|
if(srcChars == nullptr) {
|
|
srcStart = srcLength = 0;
|
|
}
|
|
|
|
// get the correct pointer
|
|
const char16_t *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(int32_t caseLocale, uint32_t options, UCASEMAP_BREAK_ITERATOR_PARAM
|
|
UStringCaseMapper *stringCaseMapper) {
|
|
if(isEmpty() || !isWritable()) {
|
|
// nothing to do
|
|
return *this;
|
|
}
|
|
|
|
char16_t oldBuffer[2 * US_STACKBUF_SIZE];
|
|
char16_t *oldArray;
|
|
int32_t oldLength = length();
|
|
int32_t newLength;
|
|
UBool writable = isBufferWritable();
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
|
|
#if !UCONFIG_NO_BREAK_ITERATION
|
|
// Read-only alias to the original string contents for the titlecasing BreakIterator.
|
|
// We cannot set the iterator simply to *this because *this is being modified.
|
|
UnicodeString oldString;
|
|
#endif
|
|
|
|
// Try to avoid heap-allocating a new character array for this string.
|
|
if (writable ? oldLength <= UPRV_LENGTHOF(oldBuffer) : oldLength < US_STACKBUF_SIZE) {
|
|
// Short string: Copy the contents into a temporary buffer and
|
|
// case-map back into the current array, or into the stack buffer.
|
|
char16_t *buffer = getArrayStart();
|
|
int32_t capacity;
|
|
oldArray = oldBuffer;
|
|
u_memcpy(oldBuffer, buffer, oldLength);
|
|
if (writable) {
|
|
capacity = getCapacity();
|
|
} else {
|
|
// Switch from the read-only alias or shared heap buffer to the stack buffer.
|
|
if (!cloneArrayIfNeeded(US_STACKBUF_SIZE, US_STACKBUF_SIZE, /* doCopyArray= */ false)) {
|
|
return *this;
|
|
}
|
|
U_ASSERT(fUnion.fFields.fLengthAndFlags & kUsingStackBuffer);
|
|
buffer = fUnion.fStackFields.fBuffer;
|
|
capacity = US_STACKBUF_SIZE;
|
|
}
|
|
#if !UCONFIG_NO_BREAK_ITERATION
|
|
if (iter != nullptr) {
|
|
oldString.setTo(false, oldArray, oldLength);
|
|
iter->setText(oldString);
|
|
}
|
|
#endif
|
|
newLength = stringCaseMapper(caseLocale, options, UCASEMAP_BREAK_ITERATOR
|
|
buffer, capacity,
|
|
oldArray, oldLength, nullptr, errorCode);
|
|
if (U_SUCCESS(errorCode)) {
|
|
setLength(newLength);
|
|
return *this;
|
|
} else if (errorCode == U_BUFFER_OVERFLOW_ERROR) {
|
|
// common overflow handling below
|
|
} else {
|
|
setToBogus();
|
|
return *this;
|
|
}
|
|
} else {
|
|
// Longer string or read-only buffer:
|
|
// Collect only changes and then apply them to this string.
|
|
// Case mapping often changes only small parts of a string,
|
|
// and often does not change its length.
|
|
oldArray = getArrayStart();
|
|
Edits edits;
|
|
char16_t replacementChars[200];
|
|
#if !UCONFIG_NO_BREAK_ITERATION
|
|
if (iter != nullptr) {
|
|
oldString.setTo(false, oldArray, oldLength);
|
|
iter->setText(oldString);
|
|
}
|
|
#endif
|
|
stringCaseMapper(caseLocale, options | U_OMIT_UNCHANGED_TEXT, UCASEMAP_BREAK_ITERATOR
|
|
replacementChars, UPRV_LENGTHOF(replacementChars),
|
|
oldArray, oldLength, &edits, errorCode);
|
|
if (U_SUCCESS(errorCode)) {
|
|
// Grow the buffer at most once, not for multiple doReplace() calls.
|
|
newLength = oldLength + edits.lengthDelta();
|
|
if (newLength > oldLength && !cloneArrayIfNeeded(newLength, newLength)) {
|
|
return *this;
|
|
}
|
|
for (Edits::Iterator ei = edits.getCoarseChangesIterator(); ei.next(errorCode);) {
|
|
doReplace(ei.destinationIndex(), ei.oldLength(),
|
|
replacementChars, ei.replacementIndex(), ei.newLength());
|
|
}
|
|
if (U_FAILURE(errorCode)) {
|
|
setToBogus();
|
|
}
|
|
return *this;
|
|
} else if (errorCode == U_BUFFER_OVERFLOW_ERROR) {
|
|
// common overflow handling below
|
|
newLength = oldLength + edits.lengthDelta();
|
|
} else {
|
|
setToBogus();
|
|
return *this;
|
|
}
|
|
}
|
|
|
|
// Handle buffer overflow, newLength is known.
|
|
// 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.
|
|
int32_t *bufferToDelete = 0;
|
|
if (!cloneArrayIfNeeded(newLength, newLength, false, &bufferToDelete, true)) {
|
|
return *this;
|
|
}
|
|
errorCode = U_ZERO_ERROR;
|
|
// No need to iter->setText() again: The case mapper restarts via iter->first().
|
|
newLength = stringCaseMapper(caseLocale, options, UCASEMAP_BREAK_ITERATOR
|
|
getArrayStart(), getCapacity(),
|
|
oldArray, oldLength, nullptr, errorCode);
|
|
if (bufferToDelete) {
|
|
uprv_free(bufferToDelete);
|
|
}
|
|
if (U_SUCCESS(errorCode)) {
|
|
setLength(newLength);
|
|
} else {
|
|
setToBogus();
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
UnicodeString &
|
|
UnicodeString::foldCase(uint32_t options) {
|
|
return caseMap(UCASE_LOC_ROOT, options, UCASEMAP_BREAK_ITERATOR_NULL 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 == nullptr) {
|
|
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 == nullptr || str2 == nullptr) {
|
|
return false;
|
|
}
|
|
return str1->caseCompare(*str2, U_FOLD_CASE_DEFAULT) == 0;
|
|
}
|