mirror of
https://github.com/SabreTools/BinaryObjectScanner.git
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141 lines
4.3 KiB
C#
141 lines
4.3 KiB
C#
/* vim: set sw=8: -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
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/*
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* gsf-input-iochannel.c: wrapper for glib's GIOChannel
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*
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* Copyright (C) 2003-2006 Dom Lachowicz (cinamod@hotmail.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2.1 of the GNU Lesser General Public
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* License as published by the Free Software Foundation.
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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 Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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using System;
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namespace LibGSF.Input
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{
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public partial class GsfInputMemory
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{
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#region Constants
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private const int BZ_BUFSIZ = 1024;
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#region bzlib.h
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private const int BZ_RUN = 0;
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private const int BZ_FLUSH = 1;
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private const int BZ_FINISH = 2;
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private const int BZ_OK = 0;
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private const int BZ_RUN_OK = 1;
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private const int BZ_FLUSH_OK = 2;
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private const int BZ_FINISH_OK = 3;
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private const int BZ_STREAM_END = 4;
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private const int BZ_SEQUENCE_ERROR = (-1);
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private const int BZ_PARAM_ERROR = (-2);
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private const int BZ_MEM_ERROR = (-3);
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private const int BZ_DATA_ERROR = (-4);
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private const int BZ_DATA_ERROR_MAGIC = (-5);
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private const int BZ_IO_ERROR = (-6);
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private const int BZ_UNEXPECTED_EOF = (-7);
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private const int BZ_OUTBUFF_FULL = (-8);
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private const int BZ_CONFIG_ERROR = (-9);
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#endregion
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#endregion
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// TODO: Implement BZIP reading
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#region Constructor
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/// <param name="err">Place to store an Exception if anything goes wrong</param>
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/// <returns>A new GsfInputMemory or null.</returns>
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public static GsfInputMemory CreateFromBzip(GsfInput source, ref Exception err)
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{
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#if BZIP2
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bz_stream bzstm;
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GsfInput* mem = NULL;
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GsfOutput* sink = NULL;
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guint8 out_buf[BZ_BUFSIZ];
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int bzerr = BZ_OK;
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g_return_val_if_fail(source != NULL, NULL);
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memset(&bzstm, 0, sizeof(bzstm));
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if (BZ_OK != BZ2_bzDecompressInit(&bzstm, 0, 0))
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{
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if (err)
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*err = g_error_new(gsf_input_error_id(), 0,
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_("BZ2 decompress init failed"));
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return NULL;
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}
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sink = gsf_output_memory_new();
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for (; ; )
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{
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bzstm.next_out = (char*)out_buf;
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bzstm.avail_out = (unsigned int)sizeof(out_buf);
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if (bzstm.avail_in == 0)
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{
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bzstm.avail_in = (unsigned int)MIN(gsf_input_remaining(source), BZ_BUFSIZ);
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bzstm.next_in = (char*)gsf_input_read(source, bzstm.avail_in, NULL);
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}
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bzerr = BZ2_bzDecompress(&bzstm);
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if (bzerr != BZ_OK && bzerr != BZ_STREAM_END)
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{
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if (err)
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*err = g_error_new(gsf_input_error_id(), 0,
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_("BZ2 decompress failed"));
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BZ2_bzDecompressEnd(&bzstm);
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gsf_output_close(sink);
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g_object_unref(sink);
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return NULL;
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}
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gsf_output_write(sink, BZ_BUFSIZ - bzstm.avail_out, out_buf);
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if (bzerr == BZ_STREAM_END)
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break;
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}
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gsf_output_close(sink);
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if (BZ_OK != BZ2_bzDecompressEnd(&bzstm)) {
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if (err)
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* err = g_error_new(gsf_input_error_id(), 0,
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_("BZ2 decompress end failed"));
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g_object_unref(sink);
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return NULL;
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}
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mem = gsf_input_memory_new_clone(
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gsf_output_memory_get_bytes (GSF_OUTPUT_MEMORY (sink)),
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gsf_output_size(sink));
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if (mem != NULL)
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gsf_input_set_name(mem, gsf_input_name (source));
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g_object_unref(sink);
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return mem;
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#else
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err = new Exception("BZ2 support not enabled");
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return null;
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#endif
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}
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#endregion
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}
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}
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