unsigned long _FTStreamRead(FXFT_Stream stream, unsigned long offset,
unsigned char* buffer, unsigned long count)
{
if (count == 0) {
return 0;
}
IFX_FileRead* pFile = (IFX_FileRead*)stream->descriptor.pointer;
int res = pFile->ReadBlock(buffer, offset, count);
if (res) {
return count;
}
return 0;
}
static unsigned long FPF_SkiaStream_Read(FXFT_Stream stream, unsigned long offset, unsigned char* buffer, unsigned long count)
{
IFX_FileRead *pFileRead = (IFX_FileRead*)stream->descriptor.pointer;
if (!pFileRead) {
return 0;
}
if (count > 0) {
if (pFileRead->ReadBlock(buffer, (FX_FILESIZE)offset, (size_t)count) != count) {
return 0;
}
}
return count;
}
FX_BOOL CPDF_Stream::Identical(CPDF_Stream* pOther) const {
if (!m_pDict)
return !pOther->m_pDict;
if (!m_pDict->Identical(pOther->m_pDict))
return FALSE;
if (m_dwSize != pOther->m_dwSize)
return FALSE;
if (!IsMemoryBased() && !pOther->IsMemoryBased()) {
if (m_pFile == pOther->m_pFile && !m_pFile)
return TRUE;
if (!m_pFile || !pOther->m_pFile)
return FALSE;
uint8_t srcBuf[kBlockSize];
uint8_t destBuf[kBlockSize];
FX_DWORD size = m_dwSize;
if (m_pFile == pOther->m_pFile)
return TRUE;
FX_DWORD offset = 0;
while (size > 0) {
FX_DWORD actualSize = std::min(size, kBlockSize);
m_pFile->ReadBlock(srcBuf, offset, actualSize);
pOther->m_pFile->ReadBlock(destBuf, offset, actualSize);
if (FXSYS_memcmp(srcBuf, destBuf, actualSize) != 0)
return FALSE;
size -= actualSize;
offset += actualSize;
}
return TRUE;
}
if (!IsMemoryBased() || !pOther->IsMemoryBased()) {
IFX_FileRead* pFile = nullptr;
uint8_t* pBuf = nullptr;
if (!pOther->IsMemoryBased()) {
pFile = pOther->m_pFile;
pBuf = m_pDataBuf;
} else if (!IsMemoryBased()) {
pFile = m_pFile;
pBuf = pOther->m_pDataBuf;
}
if (!pBuf)
return FALSE;
uint8_t srcBuf[kBlockSize];
FX_DWORD size = m_dwSize;
FX_DWORD offset = 0;
while (size > 0) {
FX_DWORD actualSize = std::min(size, kBlockSize);
pFile->ReadBlock(srcBuf, offset, actualSize);
if (FXSYS_memcmp(srcBuf, pBuf, actualSize) != 0)
return FALSE;
pBuf += actualSize;
size -= actualSize;
offset += actualSize;
}
return TRUE;
}
return FXSYS_memcmp(m_pDataBuf, pOther->m_pDataBuf, m_dwSize) == 0;
}
FX_BOOL CPDF_Stream::Identical(CPDF_Stream* pOther) const
{
if (!m_pDict)
return pOther->m_pDict ? FALSE : TRUE;
if (!m_pDict->Identical(pOther->m_pDict)) {
return FALSE;
}
if (m_dwSize != pOther->m_dwSize) {
return FALSE;
}
if (m_GenNum != (FX_DWORD) - 1 && pOther->m_GenNum != (FX_DWORD) - 1) {
if (m_pFile == pOther->m_pFile && m_pFile == NULL) {
return TRUE;
}
if (!m_pFile || !pOther->m_pFile) {
return FALSE;
}
uint8_t srcBuf[1024];
uint8_t destBuf[1024];
FX_DWORD size = m_dwSize;
FX_DWORD srcOffset = m_FileOffset;
FX_DWORD destOffset = pOther->m_FileOffset;
if (m_pFile == pOther->m_pFile && srcOffset == destOffset) {
return TRUE;
}
while (size > 0) {
FX_DWORD actualSize = size > 1024 ? 1024 : size;
m_pFile->ReadBlock(srcBuf, srcOffset, actualSize);
pOther->m_pFile->ReadBlock(destBuf, destOffset, actualSize);
if (FXSYS_memcmp(srcBuf, destBuf, actualSize) != 0) {
return FALSE;
}
size -= actualSize;
srcOffset += actualSize;
destOffset += actualSize;
}
return TRUE;
}
if (m_GenNum != (FX_DWORD) - 1 || pOther->m_GenNum != (FX_DWORD) - 1) {
IFX_FileRead* pFile = NULL;
uint8_t* pBuf = NULL;
FX_DWORD offset = 0;
if (pOther->m_GenNum != (FX_DWORD) - 1) {
pFile = pOther->m_pFile;
pBuf = m_pDataBuf;
offset = pOther->m_FileOffset;
} else if (m_GenNum != (FX_DWORD) - 1) {
pFile = m_pFile;
pBuf = pOther->m_pDataBuf;
offset = m_FileOffset;
}
if (NULL == pBuf) {
return FALSE;
}
uint8_t srcBuf[1024];
FX_DWORD size = m_dwSize;
while (size > 0) {
FX_DWORD actualSize = std::min(size, 1024U);
pFile->ReadBlock(srcBuf, offset, actualSize);
if (FXSYS_memcmp(srcBuf, pBuf, actualSize) != 0) {
return FALSE;
}
pBuf += actualSize;
size -= actualSize;
offset += actualSize;
}
return TRUE;
}
return FXSYS_memcmp(m_pDataBuf, pOther->m_pDataBuf, m_dwSize) == 0;
}