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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "file_impl.h"
#include <cassert>
#ifdef _WIN32
#include <Windows.h>
#else
#include <stdarg.h>
#include <string.h>
#endif
namespace webrtc {
FileWrapper* FileWrapper::Create()
{
return new FileWrapperImpl();
}
FileWrapperImpl::FileWrapperImpl()
: _id(NULL),
_open(false),
_looping(false),
_readOnly(false),
_text(false),
_maxSizeInBytes(-1),
_sizeInBytes(0)
{
memset(_fileNameUTF8, 0, kMaxFileNameSize);
}
FileWrapperImpl::~FileWrapperImpl()
{
if (_id != NULL)
{
fclose(_id);
}
}
WebRtc_Word32 FileWrapperImpl::CloseFile()
{
if (_id != NULL)
{
fclose(_id);
_id = NULL;
}
memset(_fileNameUTF8, 0, kMaxFileNameSize);
_open = false;
return 0;
}
int FileWrapperImpl::Rewind()
{
if(_looping || !_readOnly)
{
if (_id != NULL)
{
_sizeInBytes = 0;
return fseek(_id, 0, SEEK_SET);
}
}
return -1;
}
WebRtc_Word32 FileWrapperImpl::SetMaxFileSize(WebRtc_Word32 bytes)
{
_maxSizeInBytes = bytes;
return 0;
}
WebRtc_Word32 FileWrapperImpl::Flush()
{
if (_id != NULL)
{
return fflush(_id);
}
return -1;
}
WebRtc_Word32 FileWrapperImpl::FileName(WebRtc_Word8* fileNameUTF8,
WebRtc_UWord32 size) const
{
WebRtc_Word32 len = static_cast<WebRtc_Word32>(strlen(_fileNameUTF8));
if(len > kMaxFileNameSize)
{
assert(false);
return -1;
}
if(len < 1)
{
return -1;
}
// Make sure to NULL terminate
if(size < (WebRtc_UWord32)len)
{
len = size - 1;
}
memcpy(fileNameUTF8, _fileNameUTF8, len);
fileNameUTF8[len] = 0;
return 0;
}
bool
FileWrapperImpl::Open() const
{
return _open;
}
WebRtc_Word32 FileWrapperImpl::OpenFile(const WebRtc_Word8 *fileNameUTF8,
const bool readOnly, const bool loop,
const bool text)
{
WebRtc_Word32 length = (WebRtc_Word32)strlen(fileNameUTF8);
if (length > kMaxFileNameSize)
{
return -1;
}
_readOnly = readOnly;
FILE *tmpId = NULL;
#if defined _WIN32
wchar_t wideFileName[kMaxFileNameSize];
wideFileName[0] = 0;
MultiByteToWideChar(CP_UTF8,
0 /*UTF8 flag*/,
fileNameUTF8,
-1 /*Null terminated string*/,
wideFileName,
kMaxFileNameSize);
if(text)
{
if(readOnly)
{
tmpId = _wfopen(wideFileName, L"rt");
} else {
tmpId = _wfopen(wideFileName, L"wt");
}
} else {
if(readOnly)
{
tmpId = _wfopen(wideFileName, L"rb");
} else {
tmpId = _wfopen(wideFileName, L"wb");
}
}
#else
if(text)
{
if(readOnly)
{
tmpId = fopen(fileNameUTF8, "rt");
} else {
tmpId = fopen(fileNameUTF8, "wt");
}
} else {
if(readOnly)
{
tmpId = fopen(fileNameUTF8, "rb");
} else {
tmpId = fopen(fileNameUTF8, "wb");
}
}
#endif
if (tmpId != NULL)
{
// + 1 comes fro copying the NULL termination charachter too
memcpy(_fileNameUTF8, fileNameUTF8, length + 1);
if (_id != NULL)
{
fclose(_id);
}
_id = tmpId;
_looping = loop;
_open = true;
return 0;
}
return -1;
}
int FileWrapperImpl::Read(void *buf, int len)
{
if(len < 0)
{
return 0;
}
if (_id != NULL)
{
WebRtc_Word32 res = static_cast<WebRtc_Word32>(fread(buf, 1, len, _id));
if (res != len)
{
if(!_looping)
{
CloseFile();
}
}
return res;
}
return -1;
}
WebRtc_Word32 FileWrapperImpl::WriteText(const WebRtc_Word8* text, ...)
{
assert(!_readOnly);
assert(!_text);
if (_id == NULL)
{
return -1;
}
char tempBuff[kFileMaxTextMessageSize];
if (text)
{
va_list args;
va_start(args, text);
#ifdef _WIN32
_vsnprintf(tempBuff, kFileMaxTextMessageSize-1, text, args);
#else
vsnprintf(tempBuff, kFileMaxTextMessageSize-1, text, args);
#endif
va_end(args);
WebRtc_Word32 nBytes;
nBytes = fprintf(_id, "%s", tempBuff);
if (nBytes > 0)
{
return 0;
}
CloseFile();
}
return -1;
}
bool FileWrapperImpl::Write(const void* buf, int len)
{
assert(!_readOnly);
if (_id != NULL)
{
// Check if it's time to stop writing.
if ((_maxSizeInBytes != -1) &&
_sizeInBytes + len > (WebRtc_UWord32)_maxSizeInBytes)
{
Flush();
return false;
}
size_t nBytes = fwrite((WebRtc_UWord8*)buf, 1, len, _id);
if (nBytes > 0)
{
_sizeInBytes += static_cast<WebRtc_Word32>(nBytes);
return true;
}
CloseFile();
}
return false;
}
} // namespace webrtc
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