Aegisub/core/ass_attachment.cpp

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// Copyright (c) 2006, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
////////////
// Includes
#include <wx/wfstream.h>
#include <wx/filename.h>
#include "ass_attachment.h"
///////////////
// Constructor
AssAttachment::AssAttachment(wxString _name) {
// Parse name
filename = _name;
wxFileName fname(GetFileName());
wxString ext = fname.GetExt().Lower();
wxString name;
if (ext == _T("ttf")) {
name = fname.GetName() + _T("_0.") + ext;
}
else name = _name;
// Set data
filename = name;
data = boost::shared_ptr<AttachData> (new AttachData);
}
//////////////
// Destructor
AssAttachment::~AssAttachment() {
}
/////////
// Clone
AssEntry *AssAttachment::Clone() {
// New object
AssAttachment *clone = new AssAttachment(filename);
// Copy fields
clone->data = data;
// Return
return clone;
}
////////////
// Get data
const DataVec &AssAttachment::GetData() {
return data->GetData();
}
/////////////////
// Add more data
void AssAttachment::AddData(wxString _data) {
data->AddData(_data);
}
//////////////////////
// Finish adding data
void AssAttachment::Finish() {
data->Finish();
}
/////////////////////////////////////
// Get encoded data to write on file
const wxString AssAttachment::GetEntryData() {
// Get data
const DataVec &dat = data->GetData();
int pos = 0;
int size = dat.size();
int written = 0;
unsigned char src[3];
unsigned char dst[4];
// Write header
wxString entryData;
if (group == _T("[Fonts]")) entryData = _T("fontname: ");
else entryData = _T("filename: ");
entryData += filename + _T("\r\n");
// Read three bytes
while (pos < size) {
// Number to read
int read = size - pos;
if (read > 3) read = 3;
// Read source
src[0] = dat[pos];
if (read >= 2) src[1] = dat[pos+1];
else src[1] = 0;
if (read == 3) src[2] = dat[pos+2];
else src[2] = 0;
pos += read;
// Codify
dst[0] = src[0] >> 2;
dst[1] = ((src[0] & 0x3) << 4) | ((src[1] & 0xF0) >> 4);
dst[2] = ((src[1] & 0xF) << 2) | ((src[2] & 0xC0) >> 6);
dst[3] = src[2] & 0x3F;
// Number to write
int toWrite = read+1;
// Convert to text
for (int i=0;i<toWrite;i++) {
entryData += wxChar(dst[i]+33);
written++;
// Line break
if (written == 80 && pos < size) {
written = 0;
entryData += _T("\r\n");
}
}
}
// Return
return entryData;
}
/////////////////////
// Extract as a file
void AssAttachment::Extract(wxString filename) {
// Open file
wxFileOutputStream fp(filename);
if (!fp.Ok()) return;
fp.Write(&data->GetData()[0],data->GetData().size());
}
/////////////////////////////
// Read a file as attachment
void AssAttachment::Import(wxString filename) {
// Data
DataVec &datavec = data->GetData();
// Open file and get size
wxFileInputStream fp(filename);
if (!fp.Ok()) throw _T("Failed opening file");
int size = fp.SeekI(0,wxFromEnd);
fp.SeekI(0,wxFromStart);
// Set size and read
datavec.resize(size);
fp.Read(&datavec[0],size);
}
////////////////
// Get filename
wxString AssAttachment::GetFileName(bool raw) {
// Raw
if (raw || filename.Right(4).Lower() != _T(".ttf")) return filename;
// Remove stuff after last underscore if it's a font
int lastUnder = -1;
for (size_t i=0;i<filename.Length();i++) {
if (filename[i] == _T('_')) lastUnder = i;
}
// Underline found
wxString final = filename;
if (lastUnder != -1) {
final = filename.Left(lastUnder) + _T(".ttf");
}
return final;
}
/////////////////// Attachment //////////////////
///////////////
// Constructor
AttachData::AttachData() {
}
//////////////
// Destructor
AttachData::~AttachData() {
}
////////////
// Get data
DataVec &AttachData::GetData() {
return data;
}
////////////
// Add data
void AttachData::AddData(wxString data) {
buffer += data;
}
//////////
// Finish
void AttachData::Finish() {
// Source and dest buffers
unsigned char src[4];
unsigned char dst[3];
int bufPos = 0;
bool ok = true;
// Read buffer
while (ok) {
// Find characters left
int read = buffer.Length() - bufPos;
if (read > 4) read = 4;
int nbytes;
// At least four, proceed normally
if (read >= 2) {
// Move 4 bytes from buffer to src
for (int i=0;i<read;i++) {
src[i] = (unsigned char) buffer[bufPos] - 33;
bufPos++;
}
for (int i=read;i<4;i++) src[i] = 0;
ok = true;
nbytes = read-1;
}
// Zero, end
else {
ok = false;
break;
}
// Convert the 4 bytes from source to 3 in dst
dst[0] = (src[0] << 2) | (src[1] >> 4);
dst[1] = ((src[1] & 0xF) << 4) | (src[2] >> 2);
dst[2] = ((src[2] & 0x3) << 6) | (src[3]);
// Push into vector
size_t size = data.size();
data.resize(size+nbytes);
for (int i=0;i<nbytes;i++) data[size+i] = dst[i];
}
// Clear buffer
buffer.Clear();
buffer.Shrink();
}