1370 lines
34 KiB
C++
1370 lines
34 KiB
C++
/*
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******************************************************************************
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* Copyright (C) 1999-2004, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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******************************************************************************
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*
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* File unistr.cpp
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*
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* Modification History:
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*
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* Date Name Description
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* 09/25/98 stephen Creation.
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* 04/20/99 stephen Overhauled per 4/16 code review.
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* 07/09/99 stephen Renamed {hi,lo},{byte,word} to icu_X for HP/UX
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* 11/18/99 aliu Added handleReplaceBetween() to make inherit from
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* Replaceable.
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* 06/25/01 grhoten Removed the dependency on iostream
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******************************************************************************
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*/
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#include "unicode/utypes.h"
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#include "unicode/putil.h"
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#include "cstring.h"
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#include "cmemory.h"
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#include "unicode/ustring.h"
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#include "unicode/unistr.h"
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#include "uhash.h"
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#include "ustr_imp.h"
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#include "umutex.h"
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#if 0
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#if U_IOSTREAM_SOURCE >= 199711
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#include <iostream>
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using namespace std;
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#elif U_IOSTREAM_SOURCE >= 198506
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#include <iostream.h>
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#endif
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//DEBUGGING
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void
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print(const UnicodeString& s,
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const char *name)
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{
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UChar c;
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cout << name << ":|";
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for(int i = 0; i < s.length(); ++i) {
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c = s[i];
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if(c>= 0x007E || c < 0x0020)
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cout << "[0x" << hex << s[i] << "]";
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else
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cout << (char) s[i];
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}
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cout << '|' << endl;
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}
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void
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print(const UChar *s,
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int32_t len,
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const char *name)
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{
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UChar c;
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cout << name << ":|";
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for(int i = 0; i < len; ++i) {
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c = s[i];
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if(c>= 0x007E || c < 0x0020)
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cout << "[0x" << hex << s[i] << "]";
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else
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cout << (char) s[i];
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}
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cout << '|' << endl;
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}
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// END DEBUGGING
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#endif
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// Local function definitions for now
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// need to copy areas that may overlap
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static
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inline void
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us_arrayCopy(const UChar *src, int32_t srcStart,
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UChar *dst, int32_t dstStart, int32_t count)
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{
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if(count>0) {
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uprv_memmove(dst+dstStart, src+srcStart, (size_t)(count*sizeof(*src)));
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}
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}
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// u_unescapeAt() callback to get a UChar from a UnicodeString
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U_CDECL_BEGIN
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static UChar U_CALLCONV
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UnicodeString_charAt(int32_t offset, void *context) {
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return ((UnicodeString*) context)->charAt(offset);
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}
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U_CDECL_END
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U_NAMESPACE_BEGIN
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/* The Replaceable virtual destructor can't be defined in the header
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due to how AIX works with multiple definitions of virtual functions.
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*/
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Replaceable::~Replaceable() {}
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UnicodeString)
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UnicodeString U_EXPORT2
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operator+ (const UnicodeString &s1, const UnicodeString &s2) {
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return
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UnicodeString(s1.length()+s2.length()+1, (UChar32)0, 0).
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append(s1).
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append(s2);
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}
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//========================================
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// Reference Counting functions, put at top of file so that optimizing compilers
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// have a chance to automatically inline.
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//========================================
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void
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UnicodeString::addRef()
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{ umtx_atomic_inc((int32_t *)fArray - 1);}
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int32_t
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UnicodeString::removeRef()
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{ return umtx_atomic_dec((int32_t *)fArray - 1);}
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int32_t
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UnicodeString::refCount() const
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{
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umtx_lock(NULL);
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// Note: without the lock to force a memory barrier, we might see a very
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// stale value on some multi-processor systems.
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int32_t count = *((int32_t *)fArray - 1);
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umtx_unlock(NULL);
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return count;
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}
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void
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UnicodeString::releaseArray() {
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if((fFlags & kRefCounted) && removeRef() == 0) {
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uprv_free((int32_t *)fArray - 1);
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}
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}
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//========================================
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// Constructors
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//========================================
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UnicodeString::UnicodeString()
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: fLength(0),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{}
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UnicodeString::UnicodeString(int32_t capacity, UChar32 c, int32_t count)
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: fLength(0),
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fCapacity(US_STACKBUF_SIZE),
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fArray(0),
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fFlags(0)
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{
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if(count <= 0 || (uint32_t)c > 0x10ffff) {
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// just allocate and do not do anything else
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allocate(capacity);
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} else {
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// count > 0, allocate and fill the new string with count c's
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int32_t unitCount = UTF_CHAR_LENGTH(c), length = count * unitCount;
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if(capacity < length) {
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capacity = length;
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}
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if(allocate(capacity)) {
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int32_t i = 0;
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// fill the new string with c
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if(unitCount == 1) {
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// fill with length UChars
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while(i < length) {
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fArray[i++] = (UChar)c;
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}
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} else {
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// get the code units for c
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UChar units[UTF_MAX_CHAR_LENGTH];
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UTF_APPEND_CHAR_UNSAFE(units, i, c);
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// now it must be i==unitCount
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i = 0;
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// for Unicode, unitCount can only be 1, 2, 3, or 4
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// 1 is handled above
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while(i < length) {
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int32_t unitIdx = 0;
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while(unitIdx < unitCount) {
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fArray[i++]=units[unitIdx++];
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}
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}
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}
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}
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fLength = length;
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}
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}
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UnicodeString::UnicodeString(UChar ch)
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: fLength(1),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{
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fStackBuffer[0] = ch;
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}
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UnicodeString::UnicodeString(UChar32 ch)
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: fLength(1),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{
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int32_t i = 0;
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UBool isError = FALSE;
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U16_APPEND(fStackBuffer, i, US_STACKBUF_SIZE, ch, isError);
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fLength = i;
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}
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UnicodeString::UnicodeString(const UChar *text)
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: fLength(0),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{
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doReplace(0, 0, text, 0, -1);
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}
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UnicodeString::UnicodeString(const UChar *text,
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int32_t textLength)
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: fLength(0),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{
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doReplace(0, 0, text, 0, textLength);
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}
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UnicodeString::UnicodeString(UBool isTerminated,
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const UChar *text,
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int32_t textLength)
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: fLength(textLength),
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fCapacity(isTerminated ? textLength + 1 : textLength),
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fArray((UChar *)text),
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fFlags(kReadonlyAlias)
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{
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if(text == NULL) {
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// treat as an empty string, do not alias
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fLength = 0;
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fCapacity = US_STACKBUF_SIZE;
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fArray = fStackBuffer;
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fFlags = kShortString;
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} else if(textLength < -1 ||
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(textLength == -1 && !isTerminated) ||
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(textLength >= 0 && isTerminated && text[textLength] != 0)
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) {
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setToBogus();
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} else if(textLength == -1) {
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// text is terminated, or else it would have failed the above test
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fLength = u_strlen(text);
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fCapacity = fLength + 1;
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}
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}
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UnicodeString::UnicodeString(UChar *buff,
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int32_t buffLength,
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int32_t buffCapacity)
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: fLength(buffLength),
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fCapacity(buffCapacity),
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fArray(buff),
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fFlags(kWritableAlias)
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{
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if(buff == NULL) {
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// treat as an empty string, do not alias
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fLength = 0;
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fCapacity = US_STACKBUF_SIZE;
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fArray = fStackBuffer;
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fFlags = kShortString;
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} else if(buffLength < -1 || buffCapacity < 0 || buffLength > buffCapacity) {
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setToBogus();
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} else if(buffLength == -1) {
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// fLength = u_strlen(buff); but do not look beyond buffCapacity
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const UChar *p = buff, *limit = buff + buffCapacity;
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while(p != limit && *p != 0) {
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++p;
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}
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fLength = (int32_t)(p - buff);
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}
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}
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UnicodeString::UnicodeString(const char *src, int32_t length, EInvariant)
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: fLength(0),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{
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if(src==NULL) {
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// treat as an empty string
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} else {
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if(length<0) {
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length=uprv_strlen(src);
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}
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if(cloneArrayIfNeeded(length, length, FALSE)) {
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u_charsToUChars(src, getArrayStart(), length);
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fLength = length;
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} else {
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setToBogus();
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}
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}
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}
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UnicodeString::UnicodeString(const UnicodeString& that)
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: Replaceable(),
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fLength(0),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{
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copyFrom(that);
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}
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UnicodeString::UnicodeString(const UnicodeString& that,
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int32_t srcStart)
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: Replaceable(),
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fLength(0),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{
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setTo(that, srcStart);
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}
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UnicodeString::UnicodeString(const UnicodeString& that,
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int32_t srcStart,
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int32_t srcLength)
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: Replaceable(),
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fLength(0),
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fCapacity(US_STACKBUF_SIZE),
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fArray(fStackBuffer),
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fFlags(kShortString)
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{
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setTo(that, srcStart, srcLength);
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}
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// Replaceable base class clone() default implementation, does not clone
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Replaceable *
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Replaceable::clone() const {
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return NULL;
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}
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// UnicodeString overrides clone() with a real implementation
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Replaceable *
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UnicodeString::clone() const {
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return new UnicodeString(*this);
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}
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//========================================
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// array allocation
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//========================================
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UBool
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UnicodeString::allocate(int32_t capacity) {
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if(capacity <= US_STACKBUF_SIZE) {
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fArray = fStackBuffer;
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fCapacity = US_STACKBUF_SIZE;
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fFlags = kShortString;
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} else {
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// count bytes for the refCounter and the string capacity, and
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// round up to a multiple of 16; then divide by 4 and allocate int32_t's
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// to be safely aligned for the refCount
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int32_t words = (int32_t)(((sizeof(int32_t) + capacity * U_SIZEOF_UCHAR + 15) & ~15) >> 2);
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int32_t *array = (int32_t*) uprv_malloc( sizeof(int32_t) * words );
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if(array != 0) {
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// set initial refCount and point behind the refCount
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*array++ = 1;
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// have fArray point to the first UChar
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fArray = (UChar *)array;
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fCapacity = (int32_t)((words - 1) * (sizeof(int32_t) / U_SIZEOF_UCHAR));
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fFlags = kLongString;
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} else {
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fLength = 0;
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fCapacity = 0;
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fFlags = kIsBogus;
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return FALSE;
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}
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}
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return TRUE;
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}
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//========================================
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// Destructor
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//========================================
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UnicodeString::~UnicodeString()
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{
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releaseArray();
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}
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//========================================
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// Assignment
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//========================================
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UnicodeString &
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UnicodeString::operator=(const UnicodeString &src) {
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return copyFrom(src);
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}
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UnicodeString &
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UnicodeString::fastCopyFrom(const UnicodeString &src) {
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return copyFrom(src, TRUE);
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}
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UnicodeString &
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UnicodeString::copyFrom(const UnicodeString &src, UBool fastCopy) {
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// if assigning to ourselves, do nothing
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if(this == 0 || this == &src) {
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return *this;
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}
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// is the right side bogus?
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if(&src == 0 || src.isBogus()) {
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setToBogus();
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return *this;
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}
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// delete the current contents
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releaseArray();
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// we always copy the length
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fLength = src.fLength;
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if(fLength == 0) {
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// empty string - use the stack buffer
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fArray = fStackBuffer;
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fCapacity = US_STACKBUF_SIZE;
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fFlags = kShortString;
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return *this;
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}
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// fLength>0 and not an "open" src.getBuffer(minCapacity)
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switch(src.fFlags) {
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case kShortString:
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// short string using the stack buffer, do the same
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fArray = fStackBuffer;
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fCapacity = US_STACKBUF_SIZE;
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fFlags = kShortString;
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uprv_memcpy(fStackBuffer, src.fArray, fLength * U_SIZEOF_UCHAR);
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break;
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case kLongString:
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// src uses a refCounted string buffer, use that buffer with refCount
|
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// src is const, use a cast - we don't really change it
|
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((UnicodeString &)src).addRef();
|
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// copy all fields, share the reference-counted buffer
|
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fArray = src.fArray;
|
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fCapacity = src.fCapacity;
|
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fFlags = src.fFlags;
|
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break;
|
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case kReadonlyAlias:
|
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if(fastCopy) {
|
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// src is a readonly alias, do the same
|
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// -> maintain the readonly alias as such
|
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fArray = src.fArray;
|
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fCapacity = src.fCapacity;
|
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fFlags = src.fFlags;
|
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break;
|
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}
|
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// else if(!fastCopy) fall through to case kWritableAlias
|
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// -> allocate a new buffer and copy the contents
|
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case kWritableAlias:
|
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// src is a writable alias; we make a copy of that instead
|
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if(allocate(fLength)) {
|
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uprv_memcpy(fArray, src.fArray, fLength * U_SIZEOF_UCHAR);
|
|
break;
|
|
}
|
|
// if there is not enough memory, then fall through to setting to bogus
|
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default:
|
|
// if src is bogus, set ourselves to bogus
|
|
// do not call setToBogus() here because fArray and fFlags are not consistent here
|
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fArray = 0;
|
|
fLength = 0;
|
|
fCapacity = 0;
|
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fFlags = kIsBogus;
|
|
break;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
//========================================
|
|
// Miscellaneous operations
|
|
//========================================
|
|
|
|
UnicodeString UnicodeString::unescape() const {
|
|
UnicodeString result;
|
|
for (int32_t i=0; i<length(); ) {
|
|
UChar32 c = charAt(i++);
|
|
if (c == 0x005C /*'\\'*/) {
|
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c = unescapeAt(i); // advances i
|
|
if (c == (UChar32)0xFFFFFFFF) {
|
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result.remove(); // return empty string
|
|
break; // invalid escape sequence
|
|
}
|
|
}
|
|
result.append(c);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
UChar32 UnicodeString::unescapeAt(int32_t &offset) const {
|
|
return u_unescapeAt(UnicodeString_charAt, &offset, length(), (void*)this);
|
|
}
|
|
|
|
//========================================
|
|
// Read-only implementation
|
|
//========================================
|
|
int8_t
|
|
UnicodeString::doCompare( int32_t start,
|
|
int32_t length,
|
|
const UChar *srcChars,
|
|
int32_t srcStart,
|
|
int32_t srcLength) 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;
|
|
srcChars += srcStart;
|
|
|
|
int32_t minLength;
|
|
int8_t lengthResult;
|
|
|
|
// get the srcLength if necessary
|
|
if(srcLength < 0) {
|
|
srcLength = u_strlen(srcChars + srcStart);
|
|
}
|
|
|
|
// are we comparing different lengths?
|
|
if(length != srcLength) {
|
|
if(length < srcLength) {
|
|
minLength = length;
|
|
lengthResult = -1;
|
|
} else {
|
|
minLength = srcLength;
|
|
lengthResult = 1;
|
|
}
|
|
} else {
|
|
minLength = length;
|
|
lengthResult = 0;
|
|
}
|
|
|
|
/*
|
|
* note that uprv_memcmp() returns an int but we return an int8_t;
|
|
* we need to take care not to truncate the result -
|
|
* one way to do this is to right-shift the value to
|
|
* move the sign bit into the lower 8 bits and making sure that this
|
|
* does not become 0 itself
|
|
*/
|
|
|
|
if(minLength > 0 && chars != srcChars) {
|
|
int32_t result;
|
|
|
|
# if U_IS_BIG_ENDIAN
|
|
// big-endian: byte comparison works
|
|
result = uprv_memcmp(chars, srcChars, minLength * sizeof(UChar));
|
|
if(result != 0) {
|
|
return (int8_t)(result >> 15 | 1);
|
|
}
|
|
# else
|
|
// little-endian: compare UChar units
|
|
do {
|
|
result = ((int32_t)*(chars++) - (int32_t)*(srcChars++));
|
|
if(result != 0) {
|
|
return (int8_t)(result >> 15 | 1);
|
|
}
|
|
} while(--minLength > 0);
|
|
# endif
|
|
}
|
|
return lengthResult;
|
|
}
|
|
|
|
/* String compare in code point order - doCompare() compares in code unit order. */
|
|
int8_t
|
|
UnicodeString::doCompareCodePointOrder(int32_t start,
|
|
int32_t length,
|
|
const UChar *srcChars,
|
|
int32_t srcStart,
|
|
int32_t srcLength) 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;
|
|
}
|
|
|
|
int32_t diff = uprv_strCompare(fArray + start, length, srcChars + srcStart, srcLength, FALSE, TRUE);
|
|
/* translate the 32-bit result into an 8-bit one */
|
|
if(diff!=0) {
|
|
return (int8_t)(diff >> 15 | 1);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::getLength() const {
|
|
return length();
|
|
}
|
|
|
|
UChar
|
|
UnicodeString::getCharAt(int32_t offset) const {
|
|
return charAt(offset);
|
|
}
|
|
|
|
UChar32
|
|
UnicodeString::getChar32At(int32_t offset) const {
|
|
return char32At(offset);
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::countChar32(int32_t start, int32_t length) const {
|
|
pinIndices(start, length);
|
|
// if(isBogus()) then fArray==0 and start==0 - u_countChar32() checks for NULL
|
|
return u_countChar32(fArray+start, length);
|
|
}
|
|
|
|
UBool
|
|
UnicodeString::hasMoreChar32Than(int32_t start, int32_t length, int32_t number) const {
|
|
pinIndices(start, length);
|
|
// if(isBogus()) then fArray==0 and start==0 - u_strHasMoreChar32Than() checks for NULL
|
|
return u_strHasMoreChar32Than(fArray+start, length, number);
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::moveIndex32(int32_t index, int32_t delta) const {
|
|
// pin index
|
|
if(index<0) {
|
|
index=0;
|
|
} else if(index>fLength) {
|
|
index=fLength;
|
|
}
|
|
|
|
if(delta>0) {
|
|
UTF_FWD_N(fArray, index, fLength, delta);
|
|
} else {
|
|
UTF_BACK_N(fArray, 0, index, -delta);
|
|
}
|
|
|
|
return index;
|
|
}
|
|
|
|
void
|
|
UnicodeString::doExtract(int32_t start,
|
|
int32_t length,
|
|
UChar *dst,
|
|
int32_t dstStart) const
|
|
{
|
|
// pin indices to legal values
|
|
pinIndices(start, length);
|
|
|
|
// do not copy anything if we alias dst itself
|
|
if(fArray + start != dst + dstStart) {
|
|
us_arrayCopy(getArrayStart(), start, dst, dstStart, length);
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::extract(UChar *dest, int32_t destCapacity,
|
|
UErrorCode &errorCode) const {
|
|
if(U_SUCCESS(errorCode)) {
|
|
if(isBogus() || destCapacity<0 || (destCapacity>0 && dest==0)) {
|
|
errorCode=U_ILLEGAL_ARGUMENT_ERROR;
|
|
} else {
|
|
if(fLength>0 && fLength<=destCapacity && fArray!=dest) {
|
|
uprv_memcpy(dest, fArray, fLength*U_SIZEOF_UCHAR);
|
|
}
|
|
return u_terminateUChars(dest, destCapacity, fLength, &errorCode);
|
|
}
|
|
}
|
|
|
|
return fLength;
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::extract(int32_t start,
|
|
int32_t length,
|
|
char *target,
|
|
int32_t targetCapacity,
|
|
enum EInvariant) const
|
|
{
|
|
// if the arguments are illegal, then do nothing
|
|
if(targetCapacity < 0 || (targetCapacity > 0 && target == NULL)) {
|
|
return 0;
|
|
}
|
|
|
|
// pin the indices to legal values
|
|
pinIndices(start, length);
|
|
|
|
if(length <= targetCapacity) {
|
|
u_UCharsToChars(getArrayStart() + start, target, length);
|
|
}
|
|
UErrorCode status = U_ZERO_ERROR;
|
|
return u_terminateChars(target, targetCapacity, length, &status);
|
|
}
|
|
|
|
void
|
|
UnicodeString::extractBetween(int32_t start,
|
|
int32_t limit,
|
|
UnicodeString& target) const {
|
|
pinIndex(start);
|
|
pinIndex(limit);
|
|
doExtract(start, limit - start, target);
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::indexOf(const UChar *srcChars,
|
|
int32_t srcStart,
|
|
int32_t srcLength,
|
|
int32_t start,
|
|
int32_t length) const
|
|
{
|
|
if(isBogus() || srcChars == 0 || srcStart < 0 || srcLength == 0) {
|
|
return -1;
|
|
}
|
|
|
|
// UnicodeString does not find empty substrings
|
|
if(srcLength < 0 && srcChars[srcStart] == 0) {
|
|
return -1;
|
|
}
|
|
|
|
// get the indices within bounds
|
|
pinIndices(start, length);
|
|
|
|
// find the first occurrence of the substring
|
|
const UChar *match = u_strFindFirst(fArray + start, length, srcChars + srcStart, srcLength);
|
|
if(match == NULL) {
|
|
return -1;
|
|
} else {
|
|
return match - fArray;
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::doIndexOf(UChar c,
|
|
int32_t start,
|
|
int32_t length) const
|
|
{
|
|
// pin indices
|
|
pinIndices(start, length);
|
|
|
|
// find the first occurrence of c
|
|
const UChar *match = u_memchr(fArray + start, c, length);
|
|
if(match == NULL) {
|
|
return -1;
|
|
} else {
|
|
return match - fArray;
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::doIndexOf(UChar32 c,
|
|
int32_t start,
|
|
int32_t length) const {
|
|
// pin indices
|
|
pinIndices(start, length);
|
|
|
|
// find the first occurrence of c
|
|
const UChar *match = u_memchr32(fArray + start, c, length);
|
|
if(match == NULL) {
|
|
return -1;
|
|
} else {
|
|
return match - fArray;
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::lastIndexOf(const UChar *srcChars,
|
|
int32_t srcStart,
|
|
int32_t srcLength,
|
|
int32_t start,
|
|
int32_t length) const
|
|
{
|
|
if(isBogus() || srcChars == 0 || srcStart < 0 || srcLength == 0) {
|
|
return -1;
|
|
}
|
|
|
|
// UnicodeString does not find empty substrings
|
|
if(srcLength < 0 && srcChars[srcStart] == 0) {
|
|
return -1;
|
|
}
|
|
|
|
// get the indices within bounds
|
|
pinIndices(start, length);
|
|
|
|
// find the last occurrence of the substring
|
|
const UChar *match = u_strFindLast(fArray + start, length, srcChars + srcStart, srcLength);
|
|
if(match == NULL) {
|
|
return -1;
|
|
} else {
|
|
return match - fArray;
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::doLastIndexOf(UChar c,
|
|
int32_t start,
|
|
int32_t length) const
|
|
{
|
|
if(isBogus()) {
|
|
return -1;
|
|
}
|
|
|
|
// pin indices
|
|
pinIndices(start, length);
|
|
|
|
// find the last occurrence of c
|
|
const UChar *match = u_memrchr(fArray + start, c, length);
|
|
if(match == NULL) {
|
|
return -1;
|
|
} else {
|
|
return match - fArray;
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
UnicodeString::doLastIndexOf(UChar32 c,
|
|
int32_t start,
|
|
int32_t length) const {
|
|
// pin indices
|
|
pinIndices(start, length);
|
|
|
|
// find the last occurrence of c
|
|
const UChar *match = u_memrchr32(fArray + start, c, length);
|
|
if(match == NULL) {
|
|
return -1;
|
|
} else {
|
|
return match - fArray;
|
|
}
|
|
}
|
|
|
|
//========================================
|
|
// Write implementation
|
|
//========================================
|
|
|
|
UnicodeString&
|
|
UnicodeString::findAndReplace(int32_t start,
|
|
int32_t length,
|
|
const UnicodeString& oldText,
|
|
int32_t oldStart,
|
|
int32_t oldLength,
|
|
const UnicodeString& newText,
|
|
int32_t newStart,
|
|
int32_t newLength)
|
|
{
|
|
if(isBogus() || oldText.isBogus() || newText.isBogus()) {
|
|
return *this;
|
|
}
|
|
|
|
pinIndices(start, length);
|
|
oldText.pinIndices(oldStart, oldLength);
|
|
newText.pinIndices(newStart, newLength);
|
|
|
|
if(oldLength == 0) {
|
|
return *this;
|
|
}
|
|
|
|
while(length > 0 && length >= oldLength) {
|
|
int32_t pos = indexOf(oldText, oldStart, oldLength, start, length);
|
|
if(pos < 0) {
|
|
// no more oldText's here: done
|
|
break;
|
|
} else {
|
|
// we found oldText, replace it by newText and go beyond it
|
|
replace(pos, oldLength, newText, newStart, newLength);
|
|
length -= pos + oldLength - start;
|
|
start = pos + newLength;
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
|
|
void
|
|
UnicodeString::setToBogus()
|
|
{
|
|
releaseArray();
|
|
|
|
fArray = 0;
|
|
fCapacity = fLength = 0;
|
|
fFlags = kIsBogus;
|
|
}
|
|
|
|
// turn a bogus string into an empty one
|
|
void
|
|
UnicodeString::unBogus() {
|
|
if(fFlags & kIsBogus) {
|
|
fArray = fStackBuffer;
|
|
fLength = 0;
|
|
fCapacity = US_STACKBUF_SIZE;
|
|
fFlags = kShortString;
|
|
}
|
|
}
|
|
|
|
// setTo() analogous to the readonly-aliasing constructor with the same signature
|
|
UnicodeString &
|
|
UnicodeString::setTo(UBool isTerminated,
|
|
const UChar *text,
|
|
int32_t textLength)
|
|
{
|
|
if(fFlags & kOpenGetBuffer) {
|
|
// do not modify a string that has an "open" getBuffer(minCapacity)
|
|
return *this;
|
|
}
|
|
|
|
if(text == NULL) {
|
|
// treat as an empty string, do not alias
|
|
releaseArray();
|
|
fLength = 0;
|
|
fCapacity = US_STACKBUF_SIZE;
|
|
fArray = fStackBuffer;
|
|
fFlags = kShortString;
|
|
return *this;
|
|
}
|
|
|
|
if( textLength < -1 ||
|
|
(textLength == -1 && !isTerminated) ||
|
|
(textLength >= 0 && isTerminated && text[textLength] != 0)
|
|
) {
|
|
setToBogus();
|
|
return *this;
|
|
}
|
|
|
|
releaseArray();
|
|
|
|
fArray = (UChar *)text;
|
|
if(textLength != -1) {
|
|
fLength = textLength;
|
|
fCapacity = isTerminated ? fLength + 1 : fLength;
|
|
} else {
|
|
// text is terminated, or else it would have failed the above test
|
|
fLength = u_strlen(text);
|
|
fCapacity = fLength + 1;
|
|
}
|
|
|
|
fFlags = kReadonlyAlias;
|
|
return *this;
|
|
}
|
|
|
|
// setTo() analogous to the writable-aliasing constructor with the same signature
|
|
UnicodeString &
|
|
UnicodeString::setTo(UChar *buffer,
|
|
int32_t buffLength,
|
|
int32_t buffCapacity) {
|
|
if(fFlags & kOpenGetBuffer) {
|
|
// do not modify a string that has an "open" getBuffer(minCapacity)
|
|
return *this;
|
|
}
|
|
|
|
if(buffer == NULL) {
|
|
// treat as an empty string, do not alias
|
|
releaseArray();
|
|
fLength = 0;
|
|
fCapacity = US_STACKBUF_SIZE;
|
|
fArray = fStackBuffer;
|
|
fFlags = kShortString;
|
|
return *this;
|
|
}
|
|
|
|
if(buffLength < -1 || buffCapacity < 0 || buffLength > buffCapacity) {
|
|
setToBogus();
|
|
return *this;
|
|
} else if(buffLength == -1) {
|
|
// buffLength = u_strlen(buff); but do not look beyond buffCapacity
|
|
const UChar *p = buffer, *limit = buffer + buffCapacity;
|
|
while(p != limit && *p != 0) {
|
|
++p;
|
|
}
|
|
buffLength = (int32_t)(p - buffer);
|
|
}
|
|
|
|
releaseArray();
|
|
|
|
fArray = buffer;
|
|
fLength = buffLength;
|
|
fCapacity = buffCapacity;
|
|
fFlags = kWritableAlias;
|
|
return *this;
|
|
}
|
|
|
|
UnicodeString&
|
|
UnicodeString::setCharAt(int32_t offset,
|
|
UChar c)
|
|
{
|
|
if(cloneArrayIfNeeded() && fLength > 0) {
|
|
if(offset < 0) {
|
|
offset = 0;
|
|
} else if(offset >= fLength) {
|
|
offset = fLength - 1;
|
|
}
|
|
|
|
fArray[offset] = c;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
UnicodeString&
|
|
UnicodeString::doReplace( int32_t start,
|
|
int32_t length,
|
|
const UnicodeString& src,
|
|
int32_t srcStart,
|
|
int32_t srcLength)
|
|
{
|
|
if(!src.isBogus()) {
|
|
// pin the indices to legal values
|
|
src.pinIndices(srcStart, srcLength);
|
|
|
|
// get the characters from src
|
|
// and replace the range in ourselves with them
|
|
return doReplace(start, length, src.getArrayStart(), srcStart, srcLength);
|
|
} else {
|
|
// remove the range
|
|
return doReplace(start, length, 0, 0, 0);
|
|
}
|
|
}
|
|
|
|
UnicodeString&
|
|
UnicodeString::doReplace(int32_t start,
|
|
int32_t length,
|
|
const UChar *srcChars,
|
|
int32_t srcStart,
|
|
int32_t srcLength)
|
|
{
|
|
if(isBogus()) {
|
|
return *this;
|
|
}
|
|
|
|
if(srcChars == 0) {
|
|
srcStart = srcLength = 0;
|
|
} else if(srcLength < 0) {
|
|
// get the srcLength if necessary
|
|
srcLength = u_strlen(srcChars + srcStart);
|
|
}
|
|
|
|
int32_t *bufferToDelete = 0;
|
|
|
|
// the following may change fArray but will not copy the current contents;
|
|
// therefore we need to keep the current fArray
|
|
UChar *oldArray = fArray;
|
|
int32_t oldLength = fLength;
|
|
|
|
// pin the indices to legal values
|
|
pinIndices(start, length);
|
|
|
|
// calculate the size of the string after the replace
|
|
int32_t newSize = oldLength - length + srcLength;
|
|
|
|
// clone our array and allocate a bigger array if needed
|
|
if(!cloneArrayIfNeeded(newSize, newSize + (newSize >> 2) + kGrowSize,
|
|
FALSE, &bufferToDelete)
|
|
) {
|
|
return *this;
|
|
}
|
|
|
|
// now do the replace
|
|
|
|
if(fArray != oldArray) {
|
|
// if fArray changed, then we need to copy everything except what will change
|
|
us_arrayCopy(oldArray, 0, fArray, 0, start);
|
|
us_arrayCopy(oldArray, start + length,
|
|
fArray, start + srcLength,
|
|
oldLength - (start + length));
|
|
} else if(length != srcLength) {
|
|
// fArray did not change; copy only the portion that isn't changing, leaving a hole
|
|
us_arrayCopy(oldArray, start + length,
|
|
fArray, start + srcLength,
|
|
oldLength - (start + length));
|
|
}
|
|
|
|
// now fill in the hole with the new string
|
|
us_arrayCopy(srcChars, srcStart, getArrayStart(), start, srcLength);
|
|
|
|
fLength = newSize;
|
|
|
|
// delayed delete in case srcChars == fArray when we started, and
|
|
// to keep oldArray alive for the above operations
|
|
if (bufferToDelete) {
|
|
uprv_free(bufferToDelete);
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* Replaceable API
|
|
*/
|
|
void
|
|
UnicodeString::handleReplaceBetween(int32_t start,
|
|
int32_t limit,
|
|
const UnicodeString& text) {
|
|
replaceBetween(start, limit, text);
|
|
}
|
|
|
|
/**
|
|
* Replaceable API
|
|
*/
|
|
void
|
|
UnicodeString::copy(int32_t start, int32_t limit, int32_t dest) {
|
|
if (limit <= start) {
|
|
return; // Nothing to do; avoid bogus malloc call
|
|
}
|
|
UChar* text = (UChar*) uprv_malloc( sizeof(UChar) * (limit - start) );
|
|
extractBetween(start, limit, text, 0);
|
|
insert(dest, text, 0, limit - start);
|
|
uprv_free(text);
|
|
}
|
|
|
|
/**
|
|
* Replaceable API
|
|
*
|
|
* NOTE: This is for the Replaceable class. There is no rep.cpp,
|
|
* so we implement this function here.
|
|
*/
|
|
UBool Replaceable::hasMetaData() const {
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Replaceable API
|
|
*/
|
|
UBool UnicodeString::hasMetaData() const {
|
|
return FALSE;
|
|
}
|
|
|
|
UnicodeString&
|
|
UnicodeString::doReverse(int32_t start,
|
|
int32_t length)
|
|
{
|
|
if(fLength <= 1 || !cloneArrayIfNeeded()) {
|
|
return *this;
|
|
}
|
|
|
|
// pin the indices to legal values
|
|
pinIndices(start, length);
|
|
|
|
UChar *left = getArrayStart() + start;
|
|
UChar *right = getArrayStart() + start + length;
|
|
UChar swap;
|
|
UBool hasSupplementary = FALSE;
|
|
|
|
while(left < --right) {
|
|
hasSupplementary |= (UBool)UTF_IS_LEAD(swap = *left);
|
|
hasSupplementary |= (UBool)UTF_IS_LEAD(*left++ = *right);
|
|
*right = swap;
|
|
}
|
|
|
|
/* if there are supplementary code points in the reversed range, then re-swap their surrogates */
|
|
if(hasSupplementary) {
|
|
UChar swap2;
|
|
|
|
left = getArrayStart() + start;
|
|
right = getArrayStart() + start + length - 1; // -1 so that we can look at *(left+1) if left<right
|
|
while(left < right) {
|
|
if(UTF_IS_TRAIL(swap = *left) && UTF_IS_LEAD(swap2 = *(left + 1))) {
|
|
*left++ = swap2;
|
|
*left++ = swap;
|
|
} else {
|
|
++left;
|
|
}
|
|
}
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
UBool
|
|
UnicodeString::padLeading(int32_t targetLength,
|
|
UChar padChar)
|
|
{
|
|
if(fLength >= targetLength || !cloneArrayIfNeeded(targetLength)) {
|
|
return FALSE;
|
|
} else {
|
|
// move contents up by padding width
|
|
int32_t start = targetLength - fLength;
|
|
us_arrayCopy(fArray, 0, fArray, start, fLength);
|
|
|
|
// fill in padding character
|
|
while(--start >= 0) {
|
|
fArray[start] = padChar;
|
|
}
|
|
fLength = targetLength;
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
UBool
|
|
UnicodeString::padTrailing(int32_t targetLength,
|
|
UChar padChar)
|
|
{
|
|
if(fLength >= targetLength || !cloneArrayIfNeeded(targetLength)) {
|
|
return FALSE;
|
|
} else {
|
|
// fill in padding character
|
|
int32_t length = targetLength;
|
|
while(--length >= fLength) {
|
|
fArray[length] = padChar;
|
|
}
|
|
fLength = targetLength;
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
//========================================
|
|
// Hashing
|
|
//========================================
|
|
int32_t
|
|
UnicodeString::doHashCode() const
|
|
{
|
|
/* Delegate hash computation to uhash. This makes UnicodeString
|
|
* hashing consistent with UChar* hashing. */
|
|
int32_t hashCode = uhash_hashUCharsN(getArrayStart(), fLength);
|
|
if (hashCode == kInvalidHashCode) {
|
|
hashCode = kEmptyHashCode;
|
|
}
|
|
return hashCode;
|
|
}
|
|
|
|
//========================================
|
|
// External Buffer
|
|
//========================================
|
|
|
|
UChar *
|
|
UnicodeString::getBuffer(int32_t minCapacity) {
|
|
if(minCapacity>=-1 && cloneArrayIfNeeded(minCapacity)) {
|
|
fFlags|=kOpenGetBuffer;
|
|
fLength=0;
|
|
return fArray;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
UnicodeString::releaseBuffer(int32_t newLength) {
|
|
if(fFlags&kOpenGetBuffer && newLength>=-1) {
|
|
// set the new fLength
|
|
if(newLength==-1) {
|
|
// the new length is the string length, capped by fCapacity
|
|
const UChar *p=fArray, *limit=fArray+fCapacity;
|
|
while(p<limit && *p!=0) {
|
|
++p;
|
|
}
|
|
fLength=(int32_t)(p-fArray);
|
|
} else if(newLength<=fCapacity) {
|
|
fLength=newLength;
|
|
} else {
|
|
fLength=fCapacity;
|
|
}
|
|
fFlags&=~kOpenGetBuffer;
|
|
}
|
|
}
|
|
|
|
//========================================
|
|
// Miscellaneous
|
|
//========================================
|
|
UBool
|
|
UnicodeString::cloneArrayIfNeeded(int32_t newCapacity,
|
|
int32_t growCapacity,
|
|
UBool doCopyArray,
|
|
int32_t **pBufferToDelete,
|
|
UBool forceClone) {
|
|
// default parameters need to be static, therefore
|
|
// the defaults are -1 to have convenience defaults
|
|
if(newCapacity == -1) {
|
|
newCapacity = fCapacity;
|
|
}
|
|
|
|
// while a getBuffer(minCapacity) is "open",
|
|
// prevent any modifications of the string by returning FALSE here
|
|
// if the string is bogus, then only an assignment or similar can revive it
|
|
if((fFlags&(kOpenGetBuffer|kIsBogus))!=0) {
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* We need to make a copy of the array if
|
|
* the buffer is read-only, or
|
|
* the buffer is refCounted (shared), and refCount>1, or
|
|
* the buffer is too small.
|
|
* Return FALSE if memory could not be allocated.
|
|
*/
|
|
if(forceClone ||
|
|
fFlags & kBufferIsReadonly ||
|
|
fFlags & kRefCounted && refCount() > 1 ||
|
|
newCapacity > fCapacity
|
|
) {
|
|
// save old values
|
|
UChar *array = fArray;
|
|
uint16_t flags = fFlags;
|
|
|
|
// check growCapacity for default value and use of the stack buffer
|
|
if(growCapacity == -1) {
|
|
growCapacity = newCapacity;
|
|
} else if(newCapacity <= US_STACKBUF_SIZE && growCapacity > US_STACKBUF_SIZE) {
|
|
growCapacity = US_STACKBUF_SIZE;
|
|
}
|
|
|
|
// allocate a new array
|
|
if(allocate(growCapacity) ||
|
|
newCapacity < growCapacity && allocate(newCapacity)
|
|
) {
|
|
if(doCopyArray) {
|
|
// copy the contents
|
|
// do not copy more than what fits - it may be smaller than before
|
|
if(fCapacity < fLength) {
|
|
fLength = fCapacity;
|
|
}
|
|
us_arrayCopy(array, 0, fArray, 0, fLength);
|
|
} else {
|
|
fLength = 0;
|
|
}
|
|
|
|
// release the old array
|
|
if(flags & kRefCounted) {
|
|
// the array is refCounted; decrement and release if 0
|
|
int32_t *pRefCount = ((int32_t *)array - 1);
|
|
if(umtx_atomic_dec(pRefCount) == 0) {
|
|
if(pBufferToDelete == 0) {
|
|
uprv_free(pRefCount);
|
|
} else {
|
|
// the caller requested to delete it himself
|
|
*pBufferToDelete = pRefCount;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// not enough memory for growCapacity and not even for the smaller newCapacity
|
|
// reset the old values for setToBogus() to release the array
|
|
fArray = array;
|
|
fFlags = flags;
|
|
setToBogus();
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
U_NAMESPACE_END
|