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/* zenutils - Utilities for working with creative firmwares.
* Copyright 2007 (c) Rasmus Ry <rasmus.ry{at}gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "utils.h"
#include <fstream>
#include <zlib/zlib.h>
std::string shared::replace_extension(const std::string& filename, const std::string& extension)
{
std::string newname;
const char* name = filename.c_str();
const char* ext = strrchr(name, '.');
if (ext)
{
// If an extension was found, replace it.
newname.assign(name, ext-name);
newname += extension;
}
else
{
// If an extension was not found, append it.
newname = name;
newname += extension;
}
return newname;
}
std::string shared::remove_extension(const std::string& filename)
{
std::string newname;
const char* name = filename.c_str();
const char* ext = strrchr(name, '.');
if (ext)
{
newname.assign(name, ext-name);
}
else
{
newname = name;
}
return newname;
}
std::string shared::double_quote(const std::string& str)
{
std::string out;
for (int i = 0, j = str.length(); i < j; i++)
{
if (str[i] == '\\')
out += "\\\\";
else
out += str[i];
}
return out;
}
bool shared::inflate_to_file(const bytes& buffer, const char* filename)
{
// Open output file.
std::ofstream ofs;
ofs.open(filename, std::ios::binary);
if (!ofs)
{
return false;
}
// Initialize zlib.
z_stream d_stream; // decompression stream
d_stream.zalloc = Z_NULL;
d_stream.zfree = Z_NULL;
d_stream.opaque = Z_NULL;
d_stream.next_in = const_cast<bytes::value_type*>(&buffer[0]);
d_stream.avail_in = static_cast<uInt>(buffer.size());
int ret = inflateInit(&d_stream);
if (ret != Z_OK)
return false;
// Allocate buffer to hold the inflated data.
const size_t BUFSIZE = 1048576;
Bytef* infbuf = new Bytef[BUFSIZE];
if (!infbuf)
return false;
// Decompress untill the end of the input buffer.
uLong totalout = 0;
bool bLoop = true;
while (bLoop)
{
d_stream.next_out = infbuf;
d_stream.avail_out = BUFSIZE;
ret = inflate(&d_stream, Z_NO_FLUSH);
if (ret == Z_STREAM_END)
{
bLoop = false;
}
else if (ret != Z_OK)
{
inflateEnd(&d_stream);
delete [] infbuf;
return false;
}
// Write the inflated data to the output file.
if (!ofs.write((const char*)infbuf, d_stream.total_out-totalout))
{
inflateEnd(&d_stream);
delete [] infbuf;
return false;
}
totalout = d_stream.total_out;
}
// Cleanup and return.
inflateEnd(&d_stream);
delete [] infbuf;
return true;
}
bool shared::deflate_to_file(const bytes& buffer, const char* filename)
{
// Open output file.
std::ofstream ofs;
ofs.open(filename, std::ios::binary);
if (!ofs)
{
return false;
}
// Initialize zlib.
z_stream c_stream; // compression stream.
c_stream.zalloc = Z_NULL;
c_stream.zfree = Z_NULL;
c_stream.opaque = Z_NULL;
int ret = deflateInit(&c_stream, Z_BEST_COMPRESSION);
if (ret != Z_OK)
return false;
// Allocate buffer to hold the deflated data.
const size_t BUFSIZE = 1048576;
Bytef* defbuf = new Bytef[BUFSIZE];
if (!defbuf)
return false;
c_stream.avail_in = static_cast<uInt>(buffer.size());
c_stream.next_in = const_cast<bytes::value_type*>(&buffer[0]);
// Compress until end of the buffer.
uLong totalout = 0;
bool bLoop = true;
while (bLoop)
{
c_stream.avail_out = BUFSIZE;
c_stream.next_out = defbuf;
ret = deflate(&c_stream, Z_NO_FLUSH); // no bad return value
if (ret == Z_STREAM_END)
{
bLoop = false;
}
else if (ret == Z_BUF_ERROR && !c_stream.avail_in)
{
ret = deflate(&c_stream, Z_FINISH); // no bad return value
bLoop = false;
}
else if (ret != Z_OK)
{
deflateEnd(&c_stream);
delete [] defbuf;
return false;
}
// Write the inflated data to the output file.
if (!ofs.write((const char*)defbuf, c_stream.total_out-totalout))
{
deflateEnd(&c_stream);
delete [] defbuf;
return false;
}
totalout = c_stream.total_out;
}
// Clean up and return.
deflateEnd(&c_stream);
delete [] defbuf;
return true;
}
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