hxstring.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

    if (m_pRep)
    {
        // Update the string size since the caller could've changed the
        // internal data (the whole point of this GetBuffer()/ReleaseBuffer()
        // stuff).

        char* pBuf = m_pRep->GetBuffer();

        if (newSize >= m_pRep->GetBufferSize())
        {
            HX_ASSERT(newSize < m_pRep->GetBufferSize());
            // ...so if it's too big, clamp it to the max available.
            newSize = m_pRep->GetBufferSize() - 1;
        }

        if (newSize >= 0)
            pBuf[newSize] = '\0';
        else
            newSize = strlen(pBuf);

        if (newSize > 0)
        {
            m_pRep->SetStringSize(newSize);
            m_pRep->ResizeAndCopy(newSize);
        }
        else
        {
            if (m_pRep)
            {
                m_pRep->Release();
                m_pRep = NULL;
            }
        }
    }
    else
    {
        HX_ASSERT(!"Shouldn't call ReleaseBuffer() without GetBuffer()");

        if (newSize > 0)
            m_pRep = new CHXStringRep(newSize);
    }
}

char* CHXString::GetBufferSetLength(INT32 newSize)
{
    // NOTE : newSize is a string length, not including ending zero byte...

    HX_ASSERT(newSize >= 0);

    if (m_pRep)
    {
	EnsureUnique();
        m_pRep->ResizeAndCopy(newSize, true);
    }
    else if (newSize > 0)
	m_pRep = new CHXStringRep(newSize, true);

    return m_pRep->GetBuffer();
}

void CHXString::FreeExtra()
{
    if (m_pRep)
    {
        INT32 newSize = GetLength();
        if (newSize > 0)
	{
	    EnsureUnique();
            m_pRep->ResizeAndCopy(newSize);
	}
        else
        {
            if (m_pRep)
            {
                m_pRep->Release();
                m_pRep = NULL;
            }
        }
    }
}

INT32 CHXString::GetAllocLength() const
{
    return GetLength();
}

INT32 CHXString::SetMinBufSize(INT32 minSize)
{
    // NOTE: minSize is a string length, not including ending zero byte...

    HX_ASSERT(minSize >= 0);

    INT32 ret = 0;

    if (m_pRep)
    {
	if (minSize >= m_pRep->GetStringSize())
	{
	    if (minSize)
	    {
		EnsureUnique();
		m_pRep->ResizeAndCopy(minSize);
	    }
	    else
            {
                if (m_pRep)
                {
                    m_pRep->Release();
                    m_pRep = NULL;
                }
            }
	}
	
	if (m_pRep)
	    ret = m_pRep->GetBufferSize() - 1;
    }
    else if (minSize > 0)
    {
	m_pRep = new CHXStringRep(minSize);
	ret = minSize;
    }

    return ret;
}

#if defined(_MACINTOSH) || defined(_MAC_UNIX)

#include "platform/mac/fullpathname.h"

#include "platform/mac/cfwrappers.h"

const CHXString& CHXString::SetFromStr255(const Str255 src)
{
    char temp[256]; /* Flawfinder: ignore */
    
    if (src==NULL)
    {
        Empty();
    }
    else
    {
        memcpy (temp, &src[1], src[0]); /* Flawfinder: ignore */
        temp[src[0]] = 0;
        *this = CHXString( temp, src[0]);
    }
    
    return *this;
}

const CHXString& CHXString::AppendFromStr255(const Str255 src)
{
    char temp[256]; /* Flawfinder: ignore */
    
    if (src!=NULL)
    {
        memcpy (temp, &src[1], src[0]); /* Flawfinder: ignore */
        temp[src[0]] = 0;

        CHXString tempS;
        tempS = temp;
        *this = *this + tempS;
    }
    return *this;
}

const CHXString& CHXString::InsertFromStr255(const Str255 src)
{
    char temp[256]; /* Flawfinder: ignore */
    
    if (src!=NULL)
    {
        memcpy (temp, &src[1], src[0]); /* Flawfinder: ignore */
        temp[src[0]] = 0;

	CHXString tempS;
	tempS = temp;
	*this = tempS + *this;
    }
    
    return *this;
}
    
const CHXString& CHXString::SetFromIndString(short strlist, short item)
{
    Str255	theStr;

    GetIndString(theStr,strlist,item);

    SetFromStr255(theStr);

    return *this;
}

const CHXString& CHXString::operator =(FSSpec spec)
{
    CHXString	temp;
    
    PathNameFromFSSpec(&spec, temp);

    *this=temp;
    return *this;
}

CHXString::operator const FSSpec(void)
{
    FSSpec	spec;
    (void) FSSpecFromPathName((const char*)(*this), &spec);
    return spec;
}

HX_RESULT CHXString::MakeStr255(Str255& outPascalString) const
{
    UINT32 len = GetLength();

    if (m_pRep)
	c2pstrcpy(outPascalString, m_pRep->GetBuffer());
    
    return (len <= 255 ? HXR_OK : HXR_FAIL);
}

#if !defined(_CARBON) && !defined(_MAC_UNIX)
CHXString::operator Str255* (void)
{
#error "Not Implemented"
}

CHXString::operator const Str255* (void) const
{
#error "Not Implemented"
}

CHXString::operator ConstStr255Param (void) const
{
#error "Not Implemented"
}

#else

const CHXString& CHXString::operator =(const FSRef& ref)
{
    CHXString	temp;
    
    (void) PathFromFSRef(&ref, temp);

    *this = temp;
    return *this;
}

CHXString::operator const FSRef(void)
{
    FSRef ref;
    ZeroInit(&ref);
    (void) FSRefFromPath((const char*)(*this), &ref);
    
    return ref;
}

const CHXString& CHXString::operator =(CFStringRef ref)
{
#ifdef _MAC_CFM
	CFStringEncoding encoding = CFStringGetSystemEncoding();
#else
	CFStringEncoding encoding = kCFStringEncodingUTF8;
#endif

	// we need the string to be canonically decomposed Unicode in case it'll be used as a path on
	// an HFS disk, so we'll make a mutable copy of the string, normalize it, and then encode that as UTF-8
	
	const CFIndex kNoMaxLength = 0;
	
	CFMutableStringRef mutableRef = CFStringCreateMutableCopy(kCFAllocatorDefault, kNoMaxLength, ref);

#ifndef __MWERKS__
	// our version of CodeWarrior doesn't have CFStringNormalize in the headers since they are pre-10.2 headers, alas
	CFStringNormalize(mutableRef, kCFStringNormalizationFormD);
#endif
	
    (void) SetFromCFString(mutableRef, encoding);

	CFRelease(mutableRef);
	
    return *this;
}

HX_RESULT CHXString::SetFromCFString(CFStringRef ref, CFStringEncoding encoding)
{
    CHXString strTemp;
    char * pBuffer;
    BOOL bSuccess;
    CFIndex buffSize;

    bSuccess = FALSE;

    //const CFStringEncoding kEncoding = kCFStringEncodingUTF8;

    buffSize = 1 + CFStringGetMaximumSizeForEncoding(CFStringGetLength(ref), encoding);
    pBuffer = strTemp.GetBuffer(buffSize);
    if (pBuffer)
    {
	bSuccess = CFStringGetCString(ref, pBuffer, buffSize, encoding);
	strTemp.ReleaseBuffer();
    }

    *this = strTemp;
    return bSuccess ? HXR_OK : HXR_FAIL;	
}

HX_RESULT CHXString::SetFromHFSUniStr255(const HFSUniStr255& uniName, 
					 CFStringEncoding encoding)
{
    CHXCFString cfs(uniName);

    if (cfs.IsSet())
    {
	SetFromCFString(cfs, encoding);
	return HXR_OK;
    }
    return HXR_FAIL;
}

HX_RESULT CHXString::MakeHFSUniStr255(HFSUniStr255& outUniName, CFStringEncoding encoding) const
{
    if (GetLength() < 256)
    {
	CHXCFString cfs((const char*)(*this), encoding);

	if (cfs.IsSet())
	{
	    outUniName = (HFSUniStr255) cfs;
	    return HXR_OK;
	}
    }
    return HXR_FAIL;
}

#endif /* _CARBON || _MAC_UNIX */

#endif /* _MACINTOSH || _MAC_UNIX */

void CHXString::Init(const char* pStr, UINT32 size)
{
    if (size == UINT_MAX)
	size = (UINT32)SafeStrlen(pStr);

    if (m_pRep)
    {
	if ((UINT32)m_pRep->GetBufferSize() < (size + 1))
	    m_pRep->Resize(size);
	
	strncpy(m_pRep->GetBuffer(), pStr, size); /* Flawfinder: ignore */
	m_pRep->GetBuffer()[size] = '\0';
	m_pRep->SetStringSize(SafeStrlen(m_pRep->GetBuffer()));
    }
    else
	m_pRep = new CHXStringRep(pStr, size);
}

void CHXString::Nuke()
{
    if (m_pRep)
    {
	m_pRep->Release();
	m_pRep = 0;
    }
}

void CHXString::ConcatInPlace(const char* pStr, const UINT32 size)
{
    Append(pStr, (INT32)size);
}

void CHXString::EnsureUnique()
{
    if (m_pRep && m_pRep->IsShared())
    {
	// m_pRep is being shared. Time to copy it so that we
	// have our own copy.
	CHXStringRep* pOld = m_pRep;
	m_pRep = new CHXStringRep(pOld->GetBuffer(), 
				  pOld->GetStringSize());
	pOld->Release();
    }
}

void CHXString::Release()
{
}

INT32 CHXString::MinimalGrowth(INT32 currentSize, INT32 sizeNeeded)
{
    return sizeNeeded;
}

INT32 CHXString::DoublingGrowth(INT32 currentSize, INT32 sizeNeeded)
{
    INT32 ret = currentSize;

    while (ret < sizeNeeded)
	ret *= 2;

    return ret;
}

void CHXString::Append(const char* pStr, INT32 size)
{
    HX_ASSERT(size >= 0);

    if (size)
    {
	if (m_pRep)
	{
	    EnsureUnique();
	    
	    int newSize = m_pRep->GetStringSize() + size;

	    Grow(newSize + 1);

	    strncpy(m_pRep->GetBuffer() + m_pRep->GetStringSize(), pStr, size); /* Flawfinder: ignore */
	
	    m_pRep->GetBuffer()[newSize] = '\0';
	    m_pRep->SetStringSize(newSize);
	}
	else
	    m_pRep = new CHXStringRep(pStr, size);

    }
}

void CHXString::Grow(INT32 newSize)
{
    HX_ASSERT(m_pRep);
    HX_ASSERT(newSize >= 0);

    if (newSize > m_pRep->GetBufferSize())
    {
	INT32 growSize = m_pGrowthFunc(m_pRep->GetBufferSize(), newSize);
	
	// Protect ourselves from bad grow functions
	if (growSize < newSize)
	    growSize = newSize;
    
	m_pRep->ResizeAndCopy(growSize - 1);
    }
}