+++ /dev/null
-/*
- * COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS system libraries
- * FILE: dll/win32/framedyn/chstring.cpp
- * PURPOSE: CHString class implementation
- * PROGRAMMERS: Pierre Schweitzer (pierre@reactos.org)
- *
- * NOTE: This implementation is BROKEN on PURPOSE
- * The CHString is a mix between std::string and
- * UNICODE_STRING. It appears that basically it takes only
- * the worse from both approaches.
- * I've copied the behavior and implementation of Windows 2k3 even if
- * it implies unsafe, wrong or unefficient methods.
- * Note that the string at m_pchData might not be null terminated!
- * Also, important note, two (or even more) CHString instances might
- * have the same m_pchData object! Never forget that while modifying
- * a string. You might be modifying the string for everyone.
- * This is why a protected method is being used in the code: CopyBeforeWrite
- * It copies source first, to ensure we only modify current string
- * Side note, all the sizes are actually a number of chars. Only the size
- * for implementation is the number of bytes
- * Now, you know why this class is deprecated and shouldn't be used
- */
-
-/* INCLUDES ******************************************************************/
-
-#include <chstring.h>
-#define NDEBUG
-#include <debug.h>
-
-/* PRIVATE FUNCTIONS *********************************************************/
-
-// This is the empty string that defaults strings without text
-// This is unsafe. This string show be LPCWSTR
-// However we have to assign it to LPWSTR var. So, let's ignore about const,
-// as MS does. Normally we check in our code that we don't overwrite this string.
-LPWSTR afxPchNil = (LPWSTR)L"\0";
-// This is the data that are matching the null string upper
-CHStringData afxNullData = {0, 0, 0};
-// Exception we may throw in case of allocation failure
-CHeap_Exception HeapException(CHeap_Exception::E_ALLOCATION_ERROR);
-
-// Our own delete operator
-// It is here basically because MS guys don't known about set_new_handler()
-// See operator new
-void operator delete(void* ptr)
-{
- // In Windows 2k3, they check for ptr being null.
- // ISO, POSIX and even MSDN explains that it is allowed
- // to call free with NULL pointer...
- if (ptr)
- {
- free(ptr);
- }
-}
-
-// Implement our own new operator so that we can throw our own exception in case
-// of allocation failure.
-// It could have been done using set_new_handler(), but well. MS guys didn't do it
-// that way. So, let's mimic.
-void* operator new(size_t uSize)
-{
- void* Buffer;
-
- Buffer = malloc(uSize);
- if (!Buffer)
- {
- throw HeapException;
- }
-
- return Buffer;
-}
-
-// This is a char to wchar string conversion helper
-int mbstowcsz(LPWSTR lpDest, LPCSTR lpSrc, int nLen)
-{
- int Conv;
-
- // If we have nothing to convert or if output doesn't exist, return
- if (nLen == 0 || lpDest == 0)
- {
- return 0;
- }
-
- // Then, simply convert
- Conv = MultiByteToWideChar(CP_ACP, 0, lpSrc, -1, lpDest, nLen);
- // In case of conversion success, null terminate the string
- if (Conv != 0)
- {
- lpDest[nLen] = 0;
- }
-
- return Conv;
-}
-
-/* PUBLIC FUNCTIONS **********************************************************/
-
-/*
- * @implemented
- */
-CHString::CHString()
-{
- // Set to empty string
- m_pchData = afxPchNil;
-}
-
-/*
- * @implemented
- */
-CHString::CHString(WCHAR ch, int nRepeat) throw (CHeap_Exception)
-{
- // Allow null initialize, in case something goes wrong
- m_pchData = afxPchNil;
-
- // If we have a char to insert
- if (nRepeat >= 1)
- {
- // Allocate a buffer big enough
- AllocBuffer(nRepeat);
- // And if possible, repeat char
- if (m_pchData)
- {
- for (int i = 0; i < nRepeat; ++i)
- {
- m_pchData[i] = ch;
- }
- }
- }
-}
-
-/*
- * @implemented
- */
-CHString::CHString(LPCWSTR lpsz) throw (CHeap_Exception)
-{
- // Allow null initialize, in case something goes wrong
- m_pchData = afxPchNil;
-
- // If we have an input string
- if (lpsz != 0)
- {
- // Get its length
- int Len = SafeStrlen(lpsz);
- // Then, allocate a big enough buffer and copy string
- // Note that here, we don't null terminate the string...
- if (Len)
- {
- AllocBuffer(Len);
- wcsncpy(m_pchData, lpsz, Len);
- }
- }
-}
-
-/*
- * @implemented
- */
-CHString::CHString(LPCWSTR lpch, int nLength) throw (CHeap_Exception)
-{
- // Allow null initialize, in case something goes wrong
- m_pchData = afxPchNil;
-
- // In case we have a string with a len
- if (lpch != 0 && nLength != 0)
- {
- // Just copy the string
- AllocBuffer(nLength);
- wcsncpy(m_pchData, lpch, nLength);
- }
-}
-
-/*
- * @implemented
- */
-CHString::CHString(LPCSTR lpsz) throw (CHeap_Exception)
-{
- // Allow null initialize, in case something goes wrong
- m_pchData = afxPchNil;
-
- // If we have input string
- if (lpsz != 0)
- {
- // Get its length
- int Len = (int)strlen(lpsz);
- if (Len)
- {
- // Allocate and convert the string
- AllocBuffer(Len);
- mbstowcsz(m_pchData, lpsz, Len + 1);
- // Releasing buffer here is to allow to
- // update the buffer size. We notify we're
- // done with changing the string: recompute its
- // length, please
- ReleaseBuffer();
- }
- }
-}
-
-/*
- * @implemented
- */
-CHString::CHString(const unsigned char* lpsz)
-{
- // Null init
- Init();
- // And call operator= with const char*, easier
- *this = (LPCSTR)lpsz;
-}
-
-/*
- * @implemented
- */
-CHString::CHString(const CHString& stringSrc)
-{
- // If we have currently no referenced string
- if (stringSrc.GetData()->nRefs < 0)
- {
- // Ensure we have the null string
- m_pchData = afxPchNil;
- // And then call, the copy operator with input string
- *this = stringSrc.m_pchData;
- }
- else
- {
- // Otherwise, just copy the input string
- m_pchData = stringSrc.m_pchData;
- // And increment the number of references
- InterlockedIncrement(&GetData()->nRefs);
- // The whole point here is: Am I forget to release the old
- // data?! MS doesn't release it, but I guess we should...
- }
-}
-
-/*
- * @implemented
- */
-CHString::~CHString()
-{
- // If we have a string
- if (GetData() != &afxNullData)
- {
- // Check whether it's still in use after we release it
- if (InterlockedDecrement(&GetData()->nRefs) == 0)
- {
- // If so, delete it
- delete GetData();
- }
- }
-}
-
-/*
- * @implemented
- */
-void CHString::AllocBeforeWrite(int nLen) throw (CHeap_Exception)
-{
- // In case we have several strings pointing to our memory zone
- // Or we need bigger buffer than actual
- if (GetData()->nRefs > 1 || nLen > GetData()->nAllocLength)
- {
- // Just drop current
- // And allocate a new one which is big enough
- Release();
- AllocBuffer(nLen);
- }
-}
-
-/*
- * @implemented
- */
-void CHString::AllocBuffer(int nSize) throw (CHeap_Exception)
-{
- // Here we have to allocate a buffer for the string
- // It actually consists in: CHStringData structure
- // with a buffer big enough at its end to store the
- // string.
- CHStringData* Data;
-
- // Null size is easy allocation
- if (nSize == 0)
- {
- m_pchData = afxPchNil;
- return;
- }
-
- // We cannot allow negative sizes
- if (nSize < 0)
- {
- RaiseException(ERROR_INVALID_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- // Nor too big
- if (nSize > (INT_MAX - (int)sizeof(CHStringData)) / (int)sizeof(WCHAR))
- {
- RaiseException(STATUS_INTEGER_OVERFLOW, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- // Just allocate big enough buffer, using our own operator new
- Data = (CHStringData *)operator new(nSize * sizeof(WCHAR) + sizeof(CHStringData));
- // In case Data is null, throw an exception
- // Yes, this is stupid! Our operator new is already supposed to through an exception...
- // Thanks MS
- if (!Data)
- {
- throw HeapException;
- }
-
- Data->nRefs = 1;
- Data->nDataLength = nSize;
- Data->nAllocLength = nSize;
- Data->data()[0] = 0;
-
- // We only return the string
- // We can find back data with some mathematics
- m_pchData = Data->data();
-}
-
-/*
- * @implemented
- */
-void CHString::AllocCopy(CHString& dest, int nCopyLen, int nCopyIndex, int nExtraLen) const throw (CHeap_Exception)
-{
- // Once again, we cannot deal with negative lens
- if (nCopyLen < 0)
- {
- RaiseException(ERROR_INVALID_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- if (nCopyIndex < 0)
- {
- RaiseException(ERROR_INVALID_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- if (nExtraLen < 0)
- {
- RaiseException(ERROR_INVALID_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- // In case what we have to copy is null-sized, just set empty string
- if (nCopyLen + nExtraLen == 0)
- {
- dest.m_pchData = afxPchNil;
- return;
- }
-
- // Otherwise, allocate a buffer in new string which is big enough
- // You can note that we absolutely don't check about any existing
- // (referenced) buffer in dest. Actually, dest is to be EMPTY string.
- // The whole point of this function is to initialize a virgin string by
- // copying data from another. This is needed by Left/Mid/Right
- dest.AllocBuffer(nCopyLen + nExtraLen);
- // And copy our stuff in
- wcsncpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen);
-}
-
-/*
- * @implemented
- */
-BSTR CHString::AllocSysString() const throw (CHeap_Exception)
-{
- BSTR SysString;
-
- // Just allocate the string
- SysString = SysAllocStringLen(m_pchData, GetData()->nDataLength);
- if (!SysString)
- {
- throw HeapException;
- }
-
- return SysString;
-}
-
-/*
- * @implemented
- */
-void CHString::AssignCopy(int nSrcLen, LPCWSTR lpszSrcData) throw (CHeap_Exception)
-{
- // Don't allow negative len
- if (nSrcLen < 0)
- {
- RaiseException(ERROR_INVALID_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- // We will have to modify a string that might be shared, so duplicate it
- // Ensuring it's big enough to contain our new stuff
- AllocBeforeWrite(nSrcLen);
- if (nSrcLen == 0)
- {
- Release();
- return;
- }
-
- // Just copy, write down new size, and ensure it's null terminated
- wcsncpy(m_pchData, lpszSrcData, nSrcLen);
- GetData()->nDataLength = nSrcLen;
- m_pchData[nSrcLen] = 0;
-}
-
-/*
- * @implemented
- */
-int CHString::Collate(LPCWSTR lpsz) const
-{
- // Just call the deprecated function here - no matter we are null terminated
- // Did you read my statement about how safe is this implementation?
- return wcscoll(m_pchData, lpsz);
-}
-
-/*
- * @implemented
- */
-int CHString::Compare(LPCWSTR lpsz) const
-{
- // Just call the deprecated function here - no matter we are null terminated
- // Did you read my statement about how safe is this implementation?
- return wcscmp(m_pchData, lpsz);
-}
-
-/*
- * @implemented
- */
-int CHString::CompareNoCase(LPCWSTR lpsz) const
-{
- // Just call the deprecated function here - no matter we are null terminated
- // Did you read my statement about how safe is this implementation?
- return wcsicmp(m_pchData, lpsz);
-}
-
-/*
- * @implemented
- */
-void CHString::ConcatInPlace(int nSrcLen, LPCWSTR lpszSrcData)
-{
- // With null length, there's not that much to concat...
- if (nSrcLen == 0)
- {
- return;
- }
-
- // Still no negative length
- if (nSrcLen < 0)
- {
- RaiseException(ERROR_INVALID_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- // Ensure we wouldn't overflow with the concat
- if (GetData()->nDataLength > INT_MAX - nSrcLen)
- {
- RaiseException(STATUS_INTEGER_OVERFLOW, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- // In case we have to modify a shared string OR if it can't fit into current buffer...
- if (GetData()->nRefs > 1 || GetData()->nDataLength + nSrcLen > GetData()->nAllocLength)
- {
- // Allocate a new buffer! (without forgetting to release old one)
- CHStringData* OldData = GetData();
-
- // You remember about "InPlace" in the function's name?
- // The cake is a lie
- ConcatCopy(GetData()->nDataLength, m_pchData, nSrcLen, lpszSrcData);
- Release(OldData);
- }
- else
- {
- // Ensure we don't overflow
- if (nSrcLen > INT_MAX - GetData()->nDataLength)
- {
- RaiseException(STATUS_INTEGER_OVERFLOW, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- // Then, just copy and null terminate
- wcsncpy(m_pchData + GetData()->nDataLength, lpszSrcData, nSrcLen);
- GetData()->nDataLength += nSrcLen;
- m_pchData[GetData()->nDataLength] = 0;
- }
-}
-
-/*
- * @implemented
- */
-void CHString::ConcatCopy(int nSrc1Len, LPCWSTR lpszSrc1Data, int nSrc2Len, LPCWSTR lpszSrc2Data) throw (CHeap_Exception)
-{
- int TotalLen;
-
- if (nSrc1Len < 0 || nSrc2Len < 0)
- {
- RaiseException(ERROR_INVALID_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, 0);
- }
-
- // If both len are null, do nothing
- TotalLen = nSrc1Len + nSrc2Len;
- if (TotalLen == 0)
- {
- return;
- }
-
- // Otherwise, allocate a new buffer to hold everything (caller will release previous buffer)
- AllocBuffer(TotalLen);
- // And concat stuff
- wcsncpy(m_pchData, lpszSrc1Data, nSrc1Len);
- wcsncpy(m_pchData + nSrc1Len, lpszSrc2Data, nSrc2Len);
-}
-
-/*
- * @implemented
- */
-void CHString::CopyBeforeWrite() throw (CHeap_Exception)
-{
- CHStringData* Data;
-
- // First, we need to get reference count
- // And we also need to save Data for later copy
- Data = GetData();
-
- if (Data->nRefs <= 1)
- {
- // If its not used, don't waste time to realloc, it will do the job
- return;
- }
-
- // Release current data - we are sure it won't be freed upon that point
- // Thanks to the reference count check previously done
- Release();
- // Alloc new buffer and copy old data in it
- AllocBuffer(Data->nDataLength);
- wcsncpy(m_pchData, Data->data(), Data->nDataLength);
-}
-
-/*
- * @implemented
- */
-void CHString::Empty()
-{
- // Already empty
- if (GetData()->nDataLength == 0)
- {
- return;
- }
-
- // Empty it easily given it's reference count
- if (GetData()->nRefs < 0)
- {
- *this = afxPchNil;
- }
- else
- {
- // Otherwise, just release it
- // It will set back this instance to afxPchNil
- // while decreasing reference count
- Release();
- }
-}
-
-/*
- * @implemented
- */
-int CHString::Find(WCHAR ch) const
-{
- WCHAR *Found;
-
- // Let's use appropriate helper
- Found = wcschr(m_pchData, ch);
- // We have to return a position, so compute it
- if (Found)
- {
- return (Found - m_pchData);
- }
-
- // Otherwise, return no position
- return -1;
-}
-
-/*
- * @implemented
- */
-int CHString::Find(LPCWSTR lpszSub) const
-{
- WCHAR *Found;
-
- // Let's use appropriate helper
- Found = wcsstr(m_pchData, lpszSub);
- // We have to return a position, so compute it
- if (Found)
- {
- return (Found - m_pchData);
- }
-
- // Otherwise, return no position
- return -1;
-}
-
-/*
- * @implemented
- */
-int CHString::FindOneOf(LPCWSTR lpszCharSet) const
-{
- WCHAR *Found;
-
- // Let's use appropriate helper
- Found = wcspbrk(m_pchData, lpszCharSet);
- // We have to return a position, so compute it
- if (Found)
- {
- return (Found - m_pchData);
- }
-
- // Otherwise, return no position
- return -1;
-}
-
-/*
- * @implemented
- */
-void CHString::Format(UINT nFormatID, ...) throw (CHeap_Exception)
-{
- // Deprecated and not implemented any longer - well, this is its implementation
- return;
-}
-
-/*
- * @implemented
- */
-void CHString::Format(LPCWSTR lpszFormat, ...) throw (CHeap_Exception)
-{
- // Forward to FormatV
- va_list ArgsList;
-
- va_start(ArgsList, lpszFormat);
- FormatV(lpszFormat, ArgsList);
- va_end(ArgsList);
-}
-
-/*
- * @implemented
- */
-void CHString::FormatMessageW(UINT nFormatID, ...) throw (CHeap_Exception)
-{
- // Deprecated and not implemented any longer - well, this is its implementation
- return;
-}
-
-/*
- * @unimplemented
- */
-void CHString::FormatMessageW(LPCWSTR lpszFormat, ...) throw (CHeap_Exception)
-{
- UNIMPLEMENTED;
-}
-
-/*
- * @unimplemented
- */
-void CHString::FormatV(LPCWSTR lpszFormat, va_list argList)
-{
- UNIMPLEMENTED;
-}
-
-/*
- * @implemented
- */
-void CHString::FreeExtra() throw (CHeap_Exception)
-{
- CHStringData* OldData;
-
- // No extra? Do nothing
- if (GetData()->nDataLength == GetData()->nAllocLength)
- {
- return;
- }
-
- // Get old buffer
- OldData = GetData();
- // Allocate a new one, at the right size (with no place for \0 :-))
- AllocBuffer(GetData()->nDataLength);
- // Copy old and release it
- wcsncpy(m_pchData, OldData->data(), OldData->nDataLength);
- Release(OldData);
-}
-
-/*
- * @implemented
- */
-int CHString::GetAllocLength() const
-{
- return GetData()->nAllocLength;
-}
-
-/*
- * @implemented
- */
-WCHAR CHString::GetAt(int nIndex) const
-{
- // It's up to you to check the index!
- return m_pchData[nIndex];
-}
-
-/*
- * @implemented
- */
-LPWSTR CHString::GetBuffer(int nMinBufLength) throw (CHeap_Exception)
-{
- LPWSTR OldBuffer = m_pchData;
-
- // We'll have to allocate a new buffer if it's not big enough
- // or if it's shared by several strings
- if (GetData()->nRefs > 1 || GetData()->nAllocLength < nMinBufLength)
- {
- CHStringData* OldData = GetData();
- int OldLen = GetData()->nDataLength;
-
- // Ensure we can hold enough
- if (OldLen > nMinBufLength)
- {
- nMinBufLength = OldLen;
- }
-
- // Allocate new buffer
- AllocBuffer(nMinBufLength);
- // Copy contents
- wcsncpy(m_pchData, OldBuffer, OldLen);
- GetData()->nDataLength = OldLen;
-
- // Release old
- Release(OldData);
- }
-
- // Weirdly, here Windows always returns the old buffer
- // Which basically exposes a wrong buffer
- return OldBuffer;
-}
-
-/*
- * @implemented
- */
-LPWSTR CHString::GetBufferSetLength(int nNewLength) throw (CHeap_Exception)
-{
- // Get a buffer big enough
- // We don't care about the return, it will be set in the string
- (void)GetBuffer(nNewLength);
- // Set length, null-terminate and return
- GetData()->nDataLength = nNewLength;
- m_pchData[nNewLength] = 0;
- return m_pchData;
-}
-
-/*
- * @implemented
- */
-CHStringData* CHString::GetData() const
-{
- // In case of empty string, return empty data
- if (m_pchData == afxPchNil)
- {
- return &afxNullData;
- }
-
- // Otherwise, do maths
- return (CHStringData*)((ULONG_PTR)m_pchData - sizeof(CHStringData));
-}
-
-/*
- * @implemented
- */
-int CHString::GetLength() const
-{
- return GetData()->nDataLength;
-}
-
-/*
- * @implemented
- */
-void CHString::Init()
-{
- m_pchData = afxPchNil;
-}
-
-/*
- * @implemented
- */
-BOOL CHString::IsEmpty() const
-{
- return (GetData()->nDataLength == 0);
-}
-
-/*
- * @implemented
- */
-CHString CHString::Left(int nCount) const throw (CHeap_Exception)
-{
- CHString NewString;
-
- // Validate input (we can't get more than what we have ;-))
- if (nCount)
- {
- if (nCount > GetData()->nDataLength)
- {
- nCount = GetData()->nDataLength;
- }
- }
-
- AllocCopy(NewString, nCount, 0, 0);
-
- return NewString;
-}
-
-/*
- * @implemented
- */
-int CHString::LoadStringW(UINT nID) throw (CHeap_Exception)
-{
- // Deprecated and not implemented any longer - well, this is its implementation
- return 0;
-}
-
-/*
- * @implemented
- */
-int CHString::LoadStringW(UINT nID, LPWSTR lpszBuf, UINT nMaxBuf) throw (CHeap_Exception)
-{
- // Deprecated and not implemented any longer - well, this is its implementation
- return 0;
-}
-
-/*
- * @implemented
- */
-LPWSTR CHString::LockBuffer()
-{
- LPWSTR LockedBuffer;
-
- // The purpose here is basically to set the nRefs to max int
- LockedBuffer = GetBuffer(0);
- GetData()->nRefs = INT_MAX;
-
- return LockedBuffer;
-}
-
-/*
- * @implemented
- */
-void CHString::MakeLower() throw (CHeap_Exception)
-{
- // We'll modify string, duplicate it first if needed
- CopyBeforeWrite();
-
- // Let's use appropriate helper
- _wcslwr(m_pchData);
-}
-
-/*
- * @implemented
- */
-void CHString::MakeReverse() throw (CHeap_Exception)
-{
- // We'll modify string, duplicate it first if needed
- CopyBeforeWrite();
-
- // Let's use appropriate helper
- _wcsrev(m_pchData);
-}
-
-/*
- * @implemented
- */
-void CHString::MakeUpper() throw (CHeap_Exception)
-{
- // We'll modify string, duplicate it first if needed
- CopyBeforeWrite();
-
- // Let's use appropriate helper
- _wcsupr(m_pchData);
-}
-
-/*
- * @implemented
- */
-CHString CHString::Mid(int nFirst) const throw (CHeap_Exception)
-{
- // Take string from nFirst up to the end
- return Mid(nFirst, GetData()->nDataLength - nFirst);
-}
-
-/*
- * @implemented
- */
-CHString CHString::Mid(int nFirst, int nCount) const throw (CHeap_Exception)
-{
- CHString NewString;
-
- // Validate sizes first
- if (nFirst < 0)
- {
- nFirst = 0;
- }
-
- if (nCount < 0)
- {
- nCount = 0;
- }
-
- // Ensure we don't go beyond the string
- if (nFirst + nCount > GetData()->nDataLength)
- {
- nCount = GetData()->nDataLength - nFirst;
- }
-
- // Also ensure we don't read beyond
- // Yes, this should have been done before previous check
- // MS does it that way
- if (nFirst > GetData()->nDataLength)
- {
- nCount = 0;
- }
-
- AllocCopy(NewString, nCount, nFirst, 0);
-
- return NewString;
-}
-
-/*
- * @implemented
- */
-void CHString::Release()
-{
- // If null string, nothing to do
- if (GetData() == &afxNullData)
- {
- return;
- }
-
- // Otherwise, decrement ref count and release if required
- if (InterlockedDecrement(&GetData()->nRefs) == 0)
- {
- delete GetData();
- }
-
- // In all cases, caller doesn't want string anymore
- // So, switch back to empty string
- m_pchData = afxPchNil;
-}
-
-/*
- * @implemented
- */
-void WINAPI CHString::Release(CHStringData* pData)
-{
- // If empty string, ignore
- if (pData == &afxNullData)
- {
- return;
- }
-
- // Otherwise, simply and free if needed
- if (InterlockedDecrement(&pData->nRefs) == 0)
- {
- delete pData;
- }
-}
-
-/*
- * @implemented
- */
-void CHString::ReleaseBuffer(int nNewLength) throw (CHeap_Exception)
-{
- CHStringData* Data;
-
- // We'll modify buffer, so duplicate
- CopyBeforeWrite();
-
- // If no len provided, get one
- if (nNewLength == -1)
- {
- nNewLength = (int)wcslen(m_pchData);
- }
-
- // Set appropriate size and null-terminate
- Data = GetData();
- Data->nDataLength = nNewLength;
- Data->data()[nNewLength] = 0;
-}
-
-/*
- * @implemented
- */
-int CHString::ReverseFind(WCHAR ch) const
-{
- WCHAR *Last;
-
- // Let's use appropriate helper
- Last = wcsrchr(m_pchData, ch);
- // We have to return a position, so compute it
- if (Last)
- {
- return (Last - m_pchData);
- }
-
- // Otherwise, return no position
- return -1;
-}
-
-/*
- * @implemented
- */
-CHString CHString::Right(int nCount) const throw (CHeap_Exception)
-{
- CHString NewString;
-
- // Validate input (we can't get more than what we have ;-))
- if (nCount >= 0)
- {
- if (nCount > GetData()->nDataLength)
- {
- nCount = GetData()->nDataLength;
- }
- }
-
- AllocCopy(NewString, nCount, GetData()->nDataLength - nCount, 0);
-
- return NewString;
-}
-
-/*
- * @implemented
- */
-int CHString::SafeStrlen(LPCWSTR lpsz)
-{
- // Check we have a string and then get its length
- if (lpsz == 0)
- {
- return 0;
- }
-
- // Of course, it's not safe at all in case string is not null-terminated.
- // Things that may happen given strings are not to be null-terminated
- // in this class...
- return (int)wcslen(lpsz);
-}
-
-/*
- * @implemented
- */
-void CHString::SetAt(int nIndex, WCHAR ch) throw (CHeap_Exception)
-{
- CopyBeforeWrite();
-
- m_pchData[nIndex] = ch;
-}
-
-/*
- * @implemented
- */
-CHString CHString::SpanExcluding(LPCWSTR lpszCharSet) const throw (CHeap_Exception)
-{
- int Count;
-
- // Get position and then, extract
- Count = (int)wcscspn(m_pchData, lpszCharSet);
- return Left(Count);
-}
-
-/*
- * @implemented
- */
-CHString CHString::SpanIncluding(LPCWSTR lpszCharSet) const throw (CHeap_Exception)
-{
- int Count;
-
- // Get position and then, extract
- Count = (int)wcsspn(m_pchData, lpszCharSet);
- return Left(Count);
-}
-
-/*
- * @implemented
- */
-void CHString::TrimLeft() throw (CHeap_Exception)
-{
- int NewBegin;
- int NewLength;
- WCHAR *CurrentChar;
-
- // We'll modify, so copy first
- CopyBeforeWrite();
-
- // Start at the begin of the string
- CurrentChar = m_pchData;
- while (*CurrentChar != 0)
- {
- // Browse string till we find something which is not a space
- if (!iswspace(*CurrentChar))
- {
- break;
- }
-
- CurrentChar++;
- }
-
- // Then, calculate new begin (easy) and new length
- // And move memory
- NewBegin = (CurrentChar - m_pchData);
- NewLength = GetData()->nDataLength - NewBegin;
- memmove(m_pchData, CurrentChar, NewLength * sizeof(WCHAR));
- GetData()->nDataLength = NewLength;
-}
-
-/*
- * @implemented
- */
-void CHString::TrimRight() throw (CHeap_Exception)
-{
- WCHAR *CurrentChar;
- WCHAR *CanBeEaten;
-
- // We'll modify, so copy first
- CopyBeforeWrite();
-
- // Start at the begin of the string -- WHAT?!
- // Yes, this algorithm is the same that MS is
- // using for its TrimRight.
- // It is highly unefficient. It would have been
- // easier to start at nDataLength and to get back to
- // the begin. Note that it would have been safer as
- // well, in case the caller is using non-null-terminated
- // strings. But, well...
- CurrentChar = m_pchData;
- CanBeEaten = 0;
- while (*CurrentChar != 0)
- {
- // If not a space, reset what we can trim
- if (!iswspace(*CurrentChar))
- {
- CanBeEaten = 0;
- }
- // If it is one, and the first of the spaces serie
- // Keep its position
- else if (CanBeEaten == 0)
- {
- CanBeEaten = CurrentChar;
- }
-
- CurrentChar++;
- }
-
- // If nothing to trim, quit
- if (CanBeEaten == 0)
- {
- return;
- }
-
- // Otherwise, shorten the string
- GetData()->nDataLength = (CanBeEaten - m_pchData);
-}
-
-/*
- * @implemented
- */
-void CHString::UnlockBuffer()
-{
- // Unlock means just put ref back to 1
- // It was previously set to MAX_INT
- if (GetData() != &afxNullData)
- {
- GetData()->nRefs = 1;
- }
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator=(char ch) throw (CHeap_Exception)
-{
- *this = (WCHAR)ch;
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator=(WCHAR ch) throw (CHeap_Exception)
-{
- AssignCopy(1, &ch);
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator=(CHString *p) throw (CHeap_Exception)
-{
- *this = *p;
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator=(LPCSTR lpsz) throw (CHeap_Exception)
-{
- int Len;
-
- // If we have string, get its len
- if (lpsz != 0)
- {
- Len = (int)strlen(lpsz);
- }
- else
- {
- Len = 0;
- }
-
- // Do this call, even with null len, just to get empty string
- AllocBeforeWrite(Len);
- if (Len == 0)
- {
- Release();
- return *this;
- }
-
- // Convert and copy
- mbstowcsz(m_pchData, lpsz, Len + 1);
- // Get new size and so on
- ReleaseBuffer();
-
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator=(LPCWSTR lpsz) throw (CHeap_Exception)
-{
- int Len;
-
- Len = SafeStrlen(lpsz);
- AssignCopy(Len, lpsz);
-
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator=(const CHString& stringSrc) throw (CHeap_Exception)
-{
- // Don't copy string on itself
- if (&stringSrc == this)
- {
- return *this;
- }
-
- // In case we don't have a referenced string here,
- // or if the other is not referenced, just copy here
- if ((GetData()->nRefs < 0 && GetData() != &afxNullData) ||
- stringSrc.GetData()->nRefs < 0)
- {
- AssignCopy(stringSrc.GetData()->nDataLength, stringSrc.m_pchData);
- return *this;
- }
-
- // Otherwise, release current buffer
- Release();
- // And set buffer as stringSrc buffer
- // And increase its reference count
- m_pchData = stringSrc.m_pchData;
- InterlockedIncrement(&GetData()->nRefs);
-
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator=(const unsigned char* lpsz) throw (CHeap_Exception)
-{
- *this = (LPCSTR)lpsz;
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator+=(char ch) throw (CHeap_Exception)
-{
- *this += (WCHAR)ch;
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator+=(WCHAR ch) throw (CHeap_Exception)
-{
- ConcatInPlace(1, &ch);
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator+=(LPCWSTR lpsz) throw (CHeap_Exception)
-{
- int Len;
-
- Len = SafeStrlen(lpsz);
- ConcatInPlace(Len, lpsz);
-
- return *this;
-}
-
-/*
- * @implemented
- */
-const CHString& CHString::operator+=(const CHString& string) throw (CHeap_Exception)
-{
- ConcatInPlace(string.GetData()->nDataLength, string.m_pchData);
-
- return *this;
-}
-
-/*
- * @implemented
- */
-WCHAR CHString::operator[](int nIndex) const
-{
- return m_pchData[nIndex];
-}
-
-/*
- * @implemented
- */
-CHString::operator LPCWSTR() const
-{
- return m_pchData;
-}
-
-/*
- * @implemented
- */
-CHString WINAPI operator+(WCHAR ch, const CHString& string) throw (CHeap_Exception)
-{
- CHString NewString;
-
- // Basically concat in a new string
- NewString.ConcatCopy(1, &ch, string.GetData()->nDataLength, string.m_pchData);
-
- return NewString;
-}
-
-/*
- * @implemented
- */
-CHString WINAPI operator+(const CHString& string, WCHAR ch) throw (CHeap_Exception)
-{
- CHString NewString;
-
- // Basically concat in a new string
- NewString.ConcatCopy(string.GetData()->nDataLength, string.m_pchData, 1, &ch);
-
- return NewString;
-}
-
-/*
- * @implemented
- */
-CHString WINAPI operator+(const CHString& string, LPCWSTR lpsz) throw (CHeap_Exception)
-{
- int Len;
- CHString NewString;
-
- // Get string length
- Len = CHString::SafeStrlen(lpsz);
- // And concat in new string
- NewString.ConcatCopy(string.GetData()->nDataLength, string.m_pchData, Len, lpsz);
-
- return NewString;
-}
-
-/*
- * @implemented
- */
-CHString WINAPI operator+(LPCWSTR lpsz, const CHString& string) throw (CHeap_Exception)
-{
- int Len;
- CHString NewString;
-
- // Get string length
- Len = CHString::SafeStrlen(lpsz);
- // And concat in new string
- NewString.ConcatCopy(Len, lpsz, string.GetData()->nDataLength, string.m_pchData);
-
- return NewString;
-}
-
-/*
- * @implemented
- */
-CHString WINAPI operator+(const CHString& string1, const CHString& string2) throw (CHeap_Exception)
-{
- CHString NewString;
-
- // Basically concat in a new string
- NewString.ConcatCopy(string1.GetData()->nDataLength, string1.m_pchData,
- string2.GetData()->nDataLength, string2.m_pchData);
-
- return NewString;
-}
projects / reactos.git / blobdiff