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fysx
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/**
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* Copyright (c) 2006-2014 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#include "File.h"
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// STD
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#include <cstring>
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// LOVE
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#include "Filesystem.h"
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#include "filesystem/FileData.h"
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namespace love
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{
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namespace filesystem
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{
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namespace physfs
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{
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extern bool hack_setupWriteDirectory();
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File::File(const std::string &filename)
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: filename(filename)
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, file(0)
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, mode(CLOSED)
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, bufferMode(BUFFER_NONE)
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, bufferSize(0)
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{
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}
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File::~File()
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{
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if (mode != CLOSED)
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close();
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}
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bool File::open(Mode mode)
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{
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if (mode == CLOSED)
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return true;
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// File must exist if read mode.
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if ((mode == READ) && !PHYSFS_exists(filename.c_str()))
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throw love::Exception("Could not open file %s. Does not exist.", filename.c_str());
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// Check whether the write directory is set.
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if ((mode == APPEND || mode == WRITE) && (PHYSFS_getWriteDir() == 0) && !hack_setupWriteDirectory())
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throw love::Exception("Could not set write directory.");
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// File already open?
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if (file != 0)
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return false;
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this->mode = mode;
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switch (mode)
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{
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case READ:
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file = PHYSFS_openRead(filename.c_str());
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break;
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case APPEND:
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file = PHYSFS_openAppend(filename.c_str());
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break;
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case WRITE:
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file = PHYSFS_openWrite(filename.c_str());
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break;
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default:
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break;
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}
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if (file != 0 && !setBuffer(bufferMode, bufferSize))
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{
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// Revert to buffer defaults if we don't successfully set the buffer.
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bufferMode = BUFFER_NONE;
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bufferSize = 0;
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}
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return (file != 0);
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}
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bool File::close()
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{
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if (!PHYSFS_close(file))
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return false;
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mode = CLOSED;
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file = 0;
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return true;
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}
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bool File::isOpen() const
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{
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return mode != CLOSED && file != 0;
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}
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int64 File::getSize()
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{
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// If the file is closed, open it to
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// check the size.
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if (file == 0)
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{
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open(READ);
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int64 size = (int64)PHYSFS_fileLength(file);
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close();
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return size;
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}
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return (int64)PHYSFS_fileLength(file);
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}
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FileData *File::read(int64 size)
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{
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bool isOpen = (file != 0);
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if (!isOpen && !open(READ))
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throw love::Exception("Could not read file %s.", filename.c_str());
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int64 max = getSize();
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int64 cur = tell();
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size = (size == ALL) ? max : size;
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if (size < 0)
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throw love::Exception("Invalid read size.");
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// Clamping because the file offset may be in a weird position.
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if (cur < 0)
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cur = 0;
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else if (cur > max)
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cur = max;
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if (cur + size > max)
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size = max - cur;
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FileData *fileData = new FileData(size, getFilename());
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int64 bytesRead = read(fileData->getData(), size);
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if (bytesRead < 0 || (bytesRead == 0 && bytesRead != size))
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{
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delete fileData;
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throw love::Exception("Could not read from file.");
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}
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if (bytesRead < size)
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{
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FileData *tmpFileData = new FileData(bytesRead, getFilename());
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memcpy(tmpFileData->getData(), fileData->getData(), (size_t) bytesRead);
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delete fileData;
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fileData = tmpFileData;
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}
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if (!isOpen)
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close();
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return fileData;
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}
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int64 File::read(void *dst, int64 size)
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{
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if (!file || mode != READ)
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throw love::Exception("File is not opened for reading.");
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int64 max = (int64)PHYSFS_fileLength(file);
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size = (size == ALL) ? max : size;
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size = (size > max) ? max : size;
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// Sadly, we'll have to clamp to 32 bits here
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size = (size > LOVE_UINT32_MAX) ? LOVE_UINT32_MAX : size;
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if (size < 0)
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throw love::Exception("Invalid read size.");
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int64 read = (int64)PHYSFS_read(file, dst, 1, (PHYSFS_uint32) size);
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return read;
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}
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bool File::write(const void *data, int64 size)
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{
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if (!file || (mode != WRITE && mode != APPEND))
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throw love::Exception("File is not opened for writing.");
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// Another clamp, for the time being.
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size = (size > LOVE_UINT32_MAX) ? LOVE_UINT32_MAX : size;
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if (size < 0)
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throw love::Exception("Invalid write size.");
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// Try to write.
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int64 written = static_cast<int64>(PHYSFS_write(file, data, 1, (PHYSFS_uint32) size));
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// Check that correct amount of data was written.
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if (written != size)
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return false;
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// Manually flush the buffer in BUFFER_LINE mode if we find a newline.
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if (bufferMode == BUFFER_LINE && bufferSize > size)
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{
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if (memchr(data, '\n', (size_t) size) != NULL)
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flush();
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}
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return true;
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}
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bool File::write(const Data *data, int64 size)
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{
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return write(data->getData(), (size == ALL) ? data->getSize() : size);
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}
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bool File::flush()
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{
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if (!file || (mode != WRITE && mode != APPEND))
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throw love::Exception("File is not opened for writing.");
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return PHYSFS_flush(file) != 0;
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}
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#ifdef LOVE_WINDOWS
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// MSVC doesn't like the 'this' keyword
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// well, we'll use 'that'.
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// It zigs, we zag.
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inline bool test_eof(File *that, PHYSFS_File *)
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{
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int64 pos = that->tell();
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int64 size = that->getSize();
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return pos == -1 || size == -1 || pos >= size;
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}
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#else
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inline bool test_eof(File *, PHYSFS_File *file)
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{
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return PHYSFS_eof(file);
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}
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#endif
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bool File::eof()
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{
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if (file == 0 || test_eof(this, file))
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return true;
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return false;
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}
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int64 File::tell()
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{
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if (file == 0)
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return -1;
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return (int64) PHYSFS_tell(file);
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}
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bool File::seek(uint64 pos)
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{
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if (file == 0)
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return false;
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if (!PHYSFS_seek(file, (PHYSFS_uint64) pos))
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return false;
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return true;
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}
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bool File::setBuffer(BufferMode bufmode, int64 size)
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{
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// No negativity allowed!
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if (size < 0)
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return false;
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// If the file isn't open, we'll make sure the buffer values are set in
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// File::open.
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if (file == 0 || mode == CLOSED)
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{
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bufferMode = bufmode;
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bufferSize = size;
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return true;
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}
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int ret = 1;
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switch (bufmode)
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{
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case BUFFER_NONE:
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default:
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ret = PHYSFS_setBuffer(file, 0);
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size = 0;
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break;
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case BUFFER_LINE:
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case BUFFER_FULL:
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ret = PHYSFS_setBuffer(file, size);
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break;
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}
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if (ret == 0)
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return false;
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bufferMode = bufmode;
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bufferSize = size;
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return true;
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}
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File::BufferMode File::getBuffer(int64 &size) const
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{
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size = bufferSize;
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return bufferMode;
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}
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std::string File::getFilename() const
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{
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return filename;
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}
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std::string File::getExtension() const
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{
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std::string::size_type idx = filename.rfind('.');
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if (idx != std::string::npos)
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return filename.substr(idx+1);
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else
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return std::string();
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}
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filesystem::File::Mode File::getMode() const
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{
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return mode;
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}
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} // physfs
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} // filesystem
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} // love
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