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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fxcrt/fxcrt_posix.h"
#include "core/fxcrt/include/fx_basic.h"
#if _FXM_PLATFORM_ == _FXM_PLATFORM_LINUX_ || \
_FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || \
_FXM_PLATFORM_ == _FXM_PLATFORM_ANDROID_
IFXCRT_FileAccess* FXCRT_FileAccess_Create() {
return new CFXCRT_FileAccess_Posix;
}
void FXCRT_Posix_GetFileMode(uint32_t dwModes,
int32_t& nFlags,
int32_t& nMasks) {
nFlags = O_BINARY | O_LARGEFILE;
if (dwModes & FX_FILEMODE_ReadOnly) {
nFlags |= O_RDONLY;
nMasks = 0;
} else {
nFlags |= O_RDWR | O_CREAT;
if (dwModes & FX_FILEMODE_Truncate) {
nFlags |= O_TRUNC;
}
nMasks = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
}
}
CFXCRT_FileAccess_Posix::CFXCRT_FileAccess_Posix() : m_nFD(-1) {}
CFXCRT_FileAccess_Posix::~CFXCRT_FileAccess_Posix() {
Close();
}
FX_BOOL CFXCRT_FileAccess_Posix::Open(const CFX_ByteStringC& fileName,
uint32_t dwMode) {
if (m_nFD > -1) {
return FALSE;
}
int32_t nFlags, nMasks;
FXCRT_Posix_GetFileMode(dwMode, nFlags, nMasks);
m_nFD = open(fileName.c_str(), nFlags, nMasks);
return m_nFD > -1;
}
FX_BOOL CFXCRT_FileAccess_Posix::Open(const CFX_WideStringC& fileName,
uint32_t dwMode) {
return Open(FX_UTF8Encode(fileName).AsByteStringC(), dwMode);
}
void CFXCRT_FileAccess_Posix::Close() {
if (m_nFD < 0) {
return;
}
close(m_nFD);
m_nFD = -1;
}
void CFXCRT_FileAccess_Posix::Release() {
delete this;
}
FX_FILESIZE CFXCRT_FileAccess_Posix::GetSize() const {
if (m_nFD < 0) {
return 0;
}
struct stat s;
FXSYS_memset(&s, 0, sizeof(s));
fstat(m_nFD, &s);
return s.st_size;
}
FX_FILESIZE CFXCRT_FileAccess_Posix::GetPosition() const {
if (m_nFD < 0) {
return (FX_FILESIZE)-1;
}
return lseek(m_nFD, 0, SEEK_CUR);
}
FX_FILESIZE CFXCRT_FileAccess_Posix::SetPosition(FX_FILESIZE pos) {
if (m_nFD < 0) {
return (FX_FILESIZE)-1;
}
return lseek(m_nFD, pos, SEEK_SET);
}
size_t CFXCRT_FileAccess_Posix::Read(void* pBuffer, size_t szBuffer) {
if (m_nFD < 0) {
return 0;
}
return read(m_nFD, pBuffer, szBuffer);
}
size_t CFXCRT_FileAccess_Posix::Write(const void* pBuffer, size_t szBuffer) {
if (m_nFD < 0) {
return 0;
}
return write(m_nFD, pBuffer, szBuffer);
}
size_t CFXCRT_FileAccess_Posix::ReadPos(void* pBuffer,
size_t szBuffer,
FX_FILESIZE pos) {
if (m_nFD < 0) {
return 0;
}
if (pos >= GetSize()) {
return 0;
}
if (SetPosition(pos) == (FX_FILESIZE)-1) {
return 0;
}
return Read(pBuffer, szBuffer);
}
size_t CFXCRT_FileAccess_Posix::WritePos(const void* pBuffer,
size_t szBuffer,
FX_FILESIZE pos) {
if (m_nFD < 0) {
return 0;
}
if (SetPosition(pos) == (FX_FILESIZE)-1) {
return 0;
}
return Write(pBuffer, szBuffer);
}
FX_BOOL CFXCRT_FileAccess_Posix::Flush() {
if (m_nFD < 0) {
return FALSE;
}
return fsync(m_nFD) > -1;
}
FX_BOOL CFXCRT_FileAccess_Posix::Truncate(FX_FILESIZE szFile) {
if (m_nFD < 0) {
return FALSE;
}
return !ftruncate(m_nFD, szFile);
}
#endif
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