90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
// include/Bunzipper.hh
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// This file is part of libpbe; see http://svn.chezphil.org/libpbe/
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// (C) 2008 Philip Endecott
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#ifndef pbe_Bunzipper_hh
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#define pbe_Bunzipper_hh
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#ifdef HAVE_BZIP
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#include <bzlib.h>
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#include <string>
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namespace pbe {
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class Bunzipper {
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bz_stream bz;
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public:
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Bunzipper(bool small_mem = false) {
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bz.bzalloc = NULL;
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bz.bzfree = NULL;
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bz.opaque = NULL;
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int r = BZ2_bzDecompressInit(&bz, 0, small_mem?1:0);
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switch (r) {
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case BZ_CONFIG_ERROR: throw "BZ_CONFIG_ERROR";
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case BZ_PARAM_ERROR: throw "BZ_PARAM_ERROR";
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case BZ_MEM_ERROR: throw std::bad_alloc();
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}
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}
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~Bunzipper() {
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BZ2_bzDecompressEnd(&bz);
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}
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struct InvalidData {};
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std::string operator()(const char* in, size_t in_bytes) {
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bz.next_in = const_cast<char*>(in);
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bz.avail_in = in_bytes;
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std::string out;
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while (bz.avail_in>0) {
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char buffer[4096];
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bz.next_out = buffer;
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bz.avail_out = sizeof(buffer);
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int r = BZ2_bzDecompress(&bz);
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switch (r) {
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case BZ_PARAM_ERROR: throw "BZ_PARAM_ERROR";
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case BZ_DATA_ERROR: throw InvalidData();
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case BZ_DATA_ERROR_MAGIC: throw InvalidData();
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case BZ_MEM_ERROR: throw std::bad_alloc();
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}
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out.append(buffer,sizeof(buffer)-bz.avail_out);
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}
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return out;
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}
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std::string operator()(std::string in) {
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return operator()(in.data(),in.length());
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}
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};
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};
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#endif
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#endif
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