// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include <utility>
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#include "core/fxcrt/extension.h"
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#include "core/fxcrt/include/fx_basic.h"
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#include "core/fxcrt/include/fx_ext.h"
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#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
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#include <wincrypt.h>
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#else
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#include <ctime>
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#endif
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#ifdef PDF_ENABLE_XFA
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CFX_CRTFileAccess::CFX_CRTFileAccess() : m_RefCount(0) {}
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CFX_CRTFileAccess::~CFX_CRTFileAccess() {}
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void CFX_CRTFileAccess::Release() {
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if (--m_RefCount == 0)
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delete this;
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}
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IFX_FileAccess* CFX_CRTFileAccess::Retain() {
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m_RefCount++;
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return (IFX_FileAccess*)this;
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}
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void CFX_CRTFileAccess::GetPath(CFX_WideString& wsPath) {
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wsPath = m_path;
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}
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IFX_FileStream* CFX_CRTFileAccess::CreateFileStream(uint32_t dwModes) {
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return FX_CreateFileStream(m_path.c_str(), dwModes);
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}
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FX_BOOL CFX_CRTFileAccess::Init(const CFX_WideStringC& wsPath) {
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m_path = wsPath;
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m_RefCount = 1;
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return TRUE;
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}
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#endif // PDF_ENABLE_XFA
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CFX_CRTFileStream::CFX_CRTFileStream(std::unique_ptr<IFXCRT_FileAccess> pFA)
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: m_pFile(std::move(pFA)), m_dwCount(1) {}
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CFX_CRTFileStream::~CFX_CRTFileStream() {}
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CFX_MemoryStream::CFX_MemoryStream(FX_BOOL bConsecutive)
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: m_dwCount(1),
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m_nTotalSize(0),
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m_nCurSize(0),
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m_nCurPos(0),
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m_nGrowSize(FX_MEMSTREAM_BlockSize) {
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m_dwFlags =
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FX_MEMSTREAM_TakeOver | (bConsecutive ? FX_MEMSTREAM_Consecutive : 0);
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}
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CFX_MemoryStream::CFX_MemoryStream(uint8_t* pBuffer,
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size_t nSize,
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FX_BOOL bTakeOver)
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: m_dwCount(1),
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m_nTotalSize(nSize),
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m_nCurSize(nSize),
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m_nCurPos(0),
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m_nGrowSize(FX_MEMSTREAM_BlockSize) {
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m_Blocks.Add(pBuffer);
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m_dwFlags =
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FX_MEMSTREAM_Consecutive | (bTakeOver ? FX_MEMSTREAM_TakeOver : 0);
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}
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CFX_MemoryStream::~CFX_MemoryStream() {
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if (m_dwFlags & FX_MEMSTREAM_TakeOver) {
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for (int32_t i = 0; i < m_Blocks.GetSize(); i++) {
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FX_Free(m_Blocks[i]);
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}
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}
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m_Blocks.RemoveAll();
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}
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IFX_FileStream* CFX_MemoryStream::Retain() {
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m_dwCount++;
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return this;
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}
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void CFX_MemoryStream::Release() {
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uint32_t nCount = --m_dwCount;
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if (nCount) {
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return;
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}
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delete this;
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}
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FX_FILESIZE CFX_MemoryStream::GetSize() {
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return (FX_FILESIZE)m_nCurSize;
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}
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FX_BOOL CFX_MemoryStream::IsEOF() {
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return m_nCurPos >= (size_t)GetSize();
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}
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FX_FILESIZE CFX_MemoryStream::GetPosition() {
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return (FX_FILESIZE)m_nCurPos;
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}
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FX_BOOL CFX_MemoryStream::ReadBlock(void* buffer,
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FX_FILESIZE offset,
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size_t size) {
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if (!buffer || !size) {
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return FALSE;
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}
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FX_SAFE_SIZE_T newPos = size;
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newPos += offset;
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if (!newPos.IsValid() || newPos.ValueOrDefault(0) == 0 ||
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newPos.ValueOrDie() > m_nCurSize) {
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return FALSE;
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}
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m_nCurPos = newPos.ValueOrDie();
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if (m_dwFlags & FX_MEMSTREAM_Consecutive) {
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FXSYS_memcpy(buffer, m_Blocks[0] + (size_t)offset, size);
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return TRUE;
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}
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size_t nStartBlock = (size_t)offset / m_nGrowSize;
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offset -= (FX_FILESIZE)(nStartBlock * m_nGrowSize);
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while (size) {
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size_t nRead = m_nGrowSize - (size_t)offset;
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if (nRead > size) {
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nRead = size;
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}
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FXSYS_memcpy(buffer, m_Blocks[(int)nStartBlock] + (size_t)offset, nRead);
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buffer = ((uint8_t*)buffer) + nRead;
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size -= nRead;
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nStartBlock++;
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offset = 0;
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}
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return TRUE;
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}
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size_t CFX_MemoryStream::ReadBlock(void* buffer, size_t size) {
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if (m_nCurPos >= m_nCurSize) {
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return 0;
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}
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size_t nRead = std::min(size, m_nCurSize - m_nCurPos);
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if (!ReadBlock(buffer, (int32_t)m_nCurPos, nRead)) {
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return 0;
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}
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return nRead;
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}
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FX_BOOL CFX_MemoryStream::WriteBlock(const void* buffer,
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FX_FILESIZE offset,
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size_t size) {
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if (!buffer || !size) {
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return FALSE;
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}
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if (m_dwFlags & FX_MEMSTREAM_Consecutive) {
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FX_SAFE_SIZE_T newPos = size;
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newPos += offset;
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if (!newPos.IsValid())
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return FALSE;
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m_nCurPos = newPos.ValueOrDie();
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if (m_nCurPos > m_nTotalSize) {
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m_nTotalSize = (m_nCurPos + m_nGrowSize - 1) / m_nGrowSize * m_nGrowSize;
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if (m_Blocks.GetSize() < 1) {
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uint8_t* block = FX_Alloc(uint8_t, m_nTotalSize);
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m_Blocks.Add(block);
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} else {
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m_Blocks[0] = FX_Realloc(uint8_t, m_Blocks[0], m_nTotalSize);
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}
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if (!m_Blocks[0]) {
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m_Blocks.RemoveAll();
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return FALSE;
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}
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}
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FXSYS_memcpy(m_Blocks[0] + (size_t)offset, buffer, size);
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if (m_nCurSize < m_nCurPos) {
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m_nCurSize = m_nCurPos;
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}
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return TRUE;
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}
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FX_SAFE_SIZE_T newPos = size;
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newPos += offset;
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if (!newPos.IsValid()) {
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return FALSE;
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}
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if (!ExpandBlocks(newPos.ValueOrDie())) {
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return FALSE;
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}
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m_nCurPos = newPos.ValueOrDie();
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size_t nStartBlock = (size_t)offset / m_nGrowSize;
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offset -= (FX_FILESIZE)(nStartBlock * m_nGrowSize);
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while (size) {
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size_t nWrite = m_nGrowSize - (size_t)offset;
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if (nWrite > size) {
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nWrite = size;
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}
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FXSYS_memcpy(m_Blocks[(int)nStartBlock] + (size_t)offset, buffer, nWrite);
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buffer = ((uint8_t*)buffer) + nWrite;
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size -= nWrite;
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nStartBlock++;
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offset = 0;
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}
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return TRUE;
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}
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FX_BOOL CFX_MemoryStream::Flush() {
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return TRUE;
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}
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FX_BOOL CFX_MemoryStream::IsConsecutive() const {
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return !!(m_dwFlags & FX_MEMSTREAM_Consecutive);
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}
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void CFX_MemoryStream::EstimateSize(size_t nInitSize, size_t nGrowSize) {
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if (m_dwFlags & FX_MEMSTREAM_Consecutive) {
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if (m_Blocks.GetSize() < 1) {
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uint8_t* pBlock =
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FX_Alloc(uint8_t, std::max(nInitSize, static_cast<size_t>(4096)));
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m_Blocks.Add(pBlock);
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}
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m_nGrowSize = std::max(nGrowSize, static_cast<size_t>(4096));
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} else if (m_Blocks.GetSize() < 1) {
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m_nGrowSize = std::max(nGrowSize, static_cast<size_t>(4096));
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}
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}
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uint8_t* CFX_MemoryStream::GetBuffer() const {
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return m_Blocks.GetSize() ? m_Blocks[0] : nullptr;
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}
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void CFX_MemoryStream::AttachBuffer(uint8_t* pBuffer,
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size_t nSize,
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FX_BOOL bTakeOver) {
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if (!(m_dwFlags & FX_MEMSTREAM_Consecutive)) {
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return;
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}
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m_Blocks.RemoveAll();
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m_Blocks.Add(pBuffer);
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m_nTotalSize = m_nCurSize = nSize;
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m_nCurPos = 0;
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m_dwFlags =
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FX_MEMSTREAM_Consecutive | (bTakeOver ? FX_MEMSTREAM_TakeOver : 0);
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}
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void CFX_MemoryStream::DetachBuffer() {
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if (!(m_dwFlags & FX_MEMSTREAM_Consecutive)) {
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return;
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}
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m_Blocks.RemoveAll();
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m_nTotalSize = m_nCurSize = m_nCurPos = 0;
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m_dwFlags = FX_MEMSTREAM_TakeOver;
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}
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FX_BOOL CFX_MemoryStream::ExpandBlocks(size_t size) {
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if (m_nCurSize < size) {
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m_nCurSize = size;
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}
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if (size <= m_nTotalSize) {
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return TRUE;
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}
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int32_t iCount = m_Blocks.GetSize();
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size = (size - m_nTotalSize + m_nGrowSize - 1) / m_nGrowSize;
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m_Blocks.SetSize(m_Blocks.GetSize() + (int32_t)size);
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while (size--) {
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uint8_t* pBlock = FX_Alloc(uint8_t, m_nGrowSize);
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m_Blocks.SetAt(iCount++, pBlock);
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m_nTotalSize += m_nGrowSize;
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}
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return TRUE;
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}
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IFX_FileStream* CFX_CRTFileStream::Retain() {
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m_dwCount++;
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return this;
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}
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void CFX_CRTFileStream::Release() {
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uint32_t nCount = --m_dwCount;
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if (!nCount) {
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delete this;
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}
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}
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FX_FILESIZE CFX_CRTFileStream::GetSize() {
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return m_pFile->GetSize();
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}
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FX_BOOL CFX_CRTFileStream::IsEOF() {
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return GetPosition() >= GetSize();
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}
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FX_FILESIZE CFX_CRTFileStream::GetPosition() {
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return m_pFile->GetPosition();
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}
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FX_BOOL CFX_CRTFileStream::ReadBlock(void* buffer,
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FX_FILESIZE offset,
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size_t size) {
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return (FX_BOOL)m_pFile->ReadPos(buffer, size, offset);
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}
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size_t CFX_CRTFileStream::ReadBlock(void* buffer, size_t size) {
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return m_pFile->Read(buffer, size);
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}
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FX_BOOL CFX_CRTFileStream::WriteBlock(const void* buffer,
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FX_FILESIZE offset,
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size_t size) {
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return (FX_BOOL)m_pFile->WritePos(buffer, size, offset);
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}
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FX_BOOL CFX_CRTFileStream::Flush() {
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return m_pFile->Flush();
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}
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#ifdef PDF_ENABLE_XFA
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IFX_FileAccess* FX_CreateDefaultFileAccess(const CFX_WideStringC& wsPath) {
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if (wsPath.GetLength() == 0)
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return nullptr;
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CFX_CRTFileAccess* pFA = new CFX_CRTFileAccess;
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pFA->Init(wsPath);
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return pFA;
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}
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#endif // PDF_ENABLE_XFA
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IFX_FileStream* FX_CreateFileStream(const FX_CHAR* filename, uint32_t dwModes) {
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std::unique_ptr<IFXCRT_FileAccess> pFA(IFXCRT_FileAccess::Create());
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if (!pFA->Open(filename, dwModes))
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return nullptr;
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return new CFX_CRTFileStream(std::move(pFA));
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}
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IFX_FileStream* FX_CreateFileStream(const FX_WCHAR* filename,
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uint32_t dwModes) {
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std::unique_ptr<IFXCRT_FileAccess> pFA(IFXCRT_FileAccess::Create());
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if (!pFA->Open(filename, dwModes))
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return nullptr;
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return new CFX_CRTFileStream(std::move(pFA));
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}
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IFX_FileRead* FX_CreateFileRead(const FX_CHAR* filename) {
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return FX_CreateFileStream(filename, FX_FILEMODE_ReadOnly);
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}
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IFX_FileRead* FX_CreateFileRead(const FX_WCHAR* filename) {
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return FX_CreateFileStream(filename, FX_FILEMODE_ReadOnly);
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}
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IFX_MemoryStream* FX_CreateMemoryStream(uint8_t* pBuffer,
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size_t dwSize,
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FX_BOOL bTakeOver) {
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return new CFX_MemoryStream(pBuffer, dwSize, bTakeOver);
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}
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IFX_MemoryStream* FX_CreateMemoryStream(FX_BOOL bConsecutive) {
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return new CFX_MemoryStream(bConsecutive);
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}
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FX_FLOAT FXSYS_tan(FX_FLOAT a) {
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return (FX_FLOAT)tan(a);
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}
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FX_FLOAT FXSYS_logb(FX_FLOAT b, FX_FLOAT x) {
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return FXSYS_log(x) / FXSYS_log(b);
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}
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FX_FLOAT FXSYS_strtof(const FX_CHAR* pcsStr,
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int32_t iLength,
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int32_t* pUsedLen) {
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ASSERT(pcsStr);
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if (iLength < 0) {
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iLength = (int32_t)FXSYS_strlen(pcsStr);
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}
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CFX_WideString ws =
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CFX_WideString::FromLocal(CFX_ByteStringC(pcsStr, iLength));
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return FXSYS_wcstof(ws.c_str(), iLength, pUsedLen);
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}
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FX_FLOAT FXSYS_wcstof(const FX_WCHAR* pwsStr,
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int32_t iLength,
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int32_t* pUsedLen) {
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ASSERT(pwsStr);
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if (iLength < 0) {
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iLength = (int32_t)FXSYS_wcslen(pwsStr);
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}
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if (iLength == 0) {
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return 0.0f;
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}
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int32_t iUsedLen = 0;
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FX_BOOL bNegtive = FALSE;
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switch (pwsStr[iUsedLen]) {
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case '-':
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bNegtive = TRUE;
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case '+':
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iUsedLen++;
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break;
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}
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FX_FLOAT fValue = 0.0f;
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while (iUsedLen < iLength) {
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FX_WCHAR wch = pwsStr[iUsedLen];
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if (wch >= L'0' && wch <= L'9') {
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fValue = fValue * 10.0f + (wch - L'0');
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} else {
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break;
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}
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iUsedLen++;
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}
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if (iUsedLen < iLength && pwsStr[iUsedLen] == L'.') {
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FX_FLOAT fPrecise = 0.1f;
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while (++iUsedLen < iLength) {
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FX_WCHAR wch = pwsStr[iUsedLen];
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if (wch >= L'0' && wch <= L'9') {
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fValue += (wch - L'0') * fPrecise;
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fPrecise *= 0.1f;
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} else {
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break;
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}
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}
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}
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if (pUsedLen) {
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*pUsedLen = iUsedLen;
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}
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return bNegtive ? -fValue : fValue;
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}
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FX_WCHAR* FXSYS_wcsncpy(FX_WCHAR* dstStr,
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const FX_WCHAR* srcStr,
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size_t count) {
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ASSERT(dstStr && srcStr && count > 0);
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for (size_t i = 0; i < count; ++i)
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if ((dstStr[i] = srcStr[i]) == L'\0') {
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break;
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}
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return dstStr;
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}
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int32_t FXSYS_wcsnicmp(const FX_WCHAR* s1, const FX_WCHAR* s2, size_t count) {
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ASSERT(s1 && s2 && count > 0);
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FX_WCHAR wch1 = 0, wch2 = 0;
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while (count-- > 0) {
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wch1 = (FX_WCHAR)FXSYS_tolower(*s1++);
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wch2 = (FX_WCHAR)FXSYS_tolower(*s2++);
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if (wch1 != wch2) {
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break;
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}
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}
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return wch1 - wch2;
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}
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int32_t FXSYS_strnicmp(const FX_CHAR* s1, const FX_CHAR* s2, size_t count) {
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ASSERT(s1 && s2 && count > 0);
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FX_CHAR ch1 = 0, ch2 = 0;
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while (count-- > 0) {
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ch1 = (FX_CHAR)FXSYS_tolower(*s1++);
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ch2 = (FX_CHAR)FXSYS_tolower(*s2++);
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if (ch1 != ch2) {
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break;
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}
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}
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return ch1 - ch2;
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}
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uint32_t FX_HashCode_GetA(const CFX_ByteStringC& str, bool bIgnoreCase) {
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uint32_t dwHashCode = 0;
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if (bIgnoreCase) {
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for (FX_STRSIZE i = 0; i < str.GetLength(); ++i)
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dwHashCode = 31 * dwHashCode + FXSYS_tolower(str.CharAt(i));
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} else {
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for (FX_STRSIZE i = 0; i < str.GetLength(); ++i)
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dwHashCode = 31 * dwHashCode + str.CharAt(i);
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}
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return dwHashCode;
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}
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uint32_t FX_HashCode_GetW(const CFX_WideStringC& str, bool bIgnoreCase) {
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uint32_t dwHashCode = 0;
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if (bIgnoreCase) {
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for (FX_STRSIZE i = 0; i < str.GetLength(); ++i)
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dwHashCode = 1313 * dwHashCode + FXSYS_tolower(str.CharAt(i));
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} else {
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for (FX_STRSIZE i = 0; i < str.GetLength(); ++i)
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dwHashCode = 1313 * dwHashCode + str.CharAt(i);
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}
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return dwHashCode;
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}
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void* FX_Random_MT_Start(uint32_t dwSeed) {
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FX_MTRANDOMCONTEXT* pContext = FX_Alloc(FX_MTRANDOMCONTEXT, 1);
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pContext->mt[0] = dwSeed;
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uint32_t& i = pContext->mti;
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uint32_t* pBuf = pContext->mt;
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for (i = 1; i < MT_N; i++) {
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pBuf[i] = (1812433253UL * (pBuf[i - 1] ^ (pBuf[i - 1] >> 30)) + i);
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}
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pContext->bHaveSeed = TRUE;
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return pContext;
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}
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uint32_t FX_Random_MT_Generate(void* pContext) {
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ASSERT(pContext);
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FX_MTRANDOMCONTEXT* pMTC = static_cast<FX_MTRANDOMCONTEXT*>(pContext);
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uint32_t v;
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static uint32_t mag[2] = {0, MT_Matrix_A};
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uint32_t& mti = pMTC->mti;
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uint32_t* pBuf = pMTC->mt;
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if ((int)mti < 0 || mti >= MT_N) {
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if (mti > MT_N && !pMTC->bHaveSeed) {
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return 0;
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}
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uint32_t kk;
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for (kk = 0; kk < MT_N - MT_M; kk++) {
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v = (pBuf[kk] & MT_Upper_Mask) | (pBuf[kk + 1] & MT_Lower_Mask);
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pBuf[kk] = pBuf[kk + MT_M] ^ (v >> 1) ^ mag[v & 1];
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}
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for (; kk < MT_N - 1; kk++) {
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v = (pBuf[kk] & MT_Upper_Mask) | (pBuf[kk + 1] & MT_Lower_Mask);
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pBuf[kk] = pBuf[kk + (MT_M - MT_N)] ^ (v >> 1) ^ mag[v & 1];
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}
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v = (pBuf[MT_N - 1] & MT_Upper_Mask) | (pBuf[0] & MT_Lower_Mask);
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pBuf[MT_N - 1] = pBuf[MT_M - 1] ^ (v >> 1) ^ mag[v & 1];
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mti = 0;
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}
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v = pBuf[mti++];
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v ^= (v >> 11);
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v ^= (v << 7) & 0x9d2c5680UL;
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v ^= (v << 15) & 0xefc60000UL;
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v ^= (v >> 18);
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return v;
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}
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void FX_Random_MT_Close(void* pContext) {
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ASSERT(pContext);
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FX_Free(pContext);
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}
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void FX_Random_GenerateMT(uint32_t* pBuffer, int32_t iCount) {
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uint32_t dwSeed;
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#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
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if (!FX_GenerateCryptoRandom(&dwSeed, 1)) {
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FX_Random_GenerateBase(&dwSeed, 1);
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}
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#else
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FX_Random_GenerateBase(&dwSeed, 1);
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#endif
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void* pContext = FX_Random_MT_Start(dwSeed);
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while (iCount-- > 0) {
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*pBuffer++ = FX_Random_MT_Generate(pContext);
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}
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FX_Random_MT_Close(pContext);
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}
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void FX_Random_GenerateBase(uint32_t* pBuffer, int32_t iCount) {
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#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
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SYSTEMTIME st1, st2;
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::GetSystemTime(&st1);
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do {
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::GetSystemTime(&st2);
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} while (FXSYS_memcmp(&st1, &st2, sizeof(SYSTEMTIME)) == 0);
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uint32_t dwHash1 =
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FX_HashCode_GetA(CFX_ByteStringC((uint8_t*)&st1, sizeof(st1)), true);
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uint32_t dwHash2 =
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FX_HashCode_GetA(CFX_ByteStringC((uint8_t*)&st2, sizeof(st2)), true);
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::srand((dwHash1 << 16) | (uint32_t)dwHash2);
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#else
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time_t tmLast = time(nullptr);
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time_t tmCur;
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while ((tmCur = time(nullptr)) == tmLast) {
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continue;
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}
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::srand((tmCur << 16) | (tmLast & 0xFFFF));
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#endif
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while (iCount-- > 0) {
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*pBuffer++ = (uint32_t)((::rand() << 16) | (::rand() & 0xFFFF));
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}
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}
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#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
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FX_BOOL FX_GenerateCryptoRandom(uint32_t* pBuffer, int32_t iCount) {
|
HCRYPTPROV hCP = 0;
|
if (!::CryptAcquireContext(&hCP, nullptr, nullptr, PROV_RSA_FULL, 0) ||
|
!hCP) {
|
return FALSE;
|
}
|
::CryptGenRandom(hCP, iCount * sizeof(uint32_t), (uint8_t*)pBuffer);
|
::CryptReleaseContext(hCP, 0);
|
return TRUE;
|
}
|
#endif
|
void FX_Random_GenerateCrypto(uint32_t* pBuffer, int32_t iCount) {
|
#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
|
FX_GenerateCryptoRandom(pBuffer, iCount);
|
#else
|
FX_Random_GenerateBase(pBuffer, iCount);
|
#endif
|
}
|
|
#ifdef PDF_ENABLE_XFA
|
void FX_GUID_CreateV4(FX_LPGUID pGUID) {
|
FX_Random_GenerateMT((uint32_t*)pGUID, 4);
|
uint8_t& b = ((uint8_t*)pGUID)[6];
|
b = (b & 0x0F) | 0x40;
|
}
|
const FX_CHAR* gs_FX_pHexChars = "0123456789ABCDEF";
|
void FX_GUID_ToString(FX_LPCGUID pGUID,
|
CFX_ByteString& bsStr,
|
FX_BOOL bSeparator) {
|
FX_CHAR* pBuf = bsStr.GetBuffer(40);
|
uint8_t b;
|
for (int32_t i = 0; i < 16; i++) {
|
b = ((const uint8_t*)pGUID)[i];
|
*pBuf++ = gs_FX_pHexChars[b >> 4];
|
*pBuf++ = gs_FX_pHexChars[b & 0x0F];
|
if (bSeparator && (i == 3 || i == 5 || i == 7 || i == 9)) {
|
*pBuf++ = L'-';
|
}
|
}
|
bsStr.ReleaseBuffer(bSeparator ? 36 : 32);
|
}
|
#endif // PDF_ENABLE_XFA
|
