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/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2009 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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ae235b |
* modify it under the terms of the GNU Lesser General Public
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ae235b |
* License as published by the Free Software Foundation; either
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ae235b |
* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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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ae235b |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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ae235b |
* Lesser General Public License for more details.
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ae235b |
*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#include "config.h"
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#include "gzlibdecompressor.h"
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#include <errno.h>
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#include <zlib.h>
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#include <string.h>
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#include "gfileinfo.h"
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#include "gioerror.h"
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#include "gioenums.h"
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#include "gioenumtypes.h"
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#include "glibintl.h"
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enum {
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PROP_0,
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PROP_FORMAT,
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PROP_FILE_INFO
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};
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/**
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* SECTION:gzdecompressor
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* @short_description: Zlib decompressor
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* @include: gio/gio.h
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*
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* #GZlibDecompressor is an implementation of #GConverter that
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* decompresses data compressed with zlib.
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*/
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static void g_zlib_decompressor_iface_init (GConverterIface *iface);
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typedef struct {
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gz_header gzheader;
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char filename[257];
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GFileInfo *file_info;
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} HeaderData;
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/**
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* GZlibDecompressor:
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*
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* Zlib decompression
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*/
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struct _GZlibDecompressor
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{
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GObject parent_instance;
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GZlibCompressorFormat format;
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z_stream zstream;
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HeaderData *header_data;
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};
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static void
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g_zlib_decompressor_set_gzheader (GZlibDecompressor *decompressor)
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{
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/* On win32, these functions were not exported before 1.2.4 */
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#if !defined (G_OS_WIN32) || ZLIB_VERNUM >= 0x1240
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if (decompressor->format != G_ZLIB_COMPRESSOR_FORMAT_GZIP)
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return;
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if (decompressor->header_data != NULL)
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{
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if (decompressor->header_data->file_info)
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g_object_unref (decompressor->header_data->file_info);
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memset (decompressor->header_data, 0, sizeof (HeaderData));
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}
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else
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{
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decompressor->header_data = g_new0 (HeaderData, 1);
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}
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decompressor->header_data->gzheader.name = (Bytef*) &decompressor->header_data->filename;
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/* We keep one byte to guarantee the string is 0-terminated */
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decompressor->header_data->gzheader.name_max = 256;
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if (inflateGetHeader (&decompressor->zstream, &decompressor->header_data->gzheader) != Z_OK)
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g_warning ("unexpected zlib error: %s\n", decompressor->zstream.msg);
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#endif /* !G_OS_WIN32 || ZLIB >= 1.2.4 */
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}
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G_DEFINE_TYPE_WITH_CODE (GZlibDecompressor, g_zlib_decompressor, G_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (G_TYPE_CONVERTER,
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g_zlib_decompressor_iface_init))
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static void
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g_zlib_decompressor_finalize (GObject *object)
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{
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GZlibDecompressor *decompressor;
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decompressor = G_ZLIB_DECOMPRESSOR (object);
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inflateEnd (&decompressor->zstream);
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if (decompressor->header_data != NULL)
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{
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if (decompressor->header_data->file_info)
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g_object_unref (decompressor->header_data->file_info);
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g_free (decompressor->header_data);
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}
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G_OBJECT_CLASS (g_zlib_decompressor_parent_class)->finalize (object);
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}
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ae235b |
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static void
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g_zlib_decompressor_set_property (GObject *object,
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guint prop_id,
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ae235b |
const GValue *value,
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ae235b |
GParamSpec *pspec)
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ae235b |
{
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ae235b |
GZlibDecompressor *decompressor;
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ae235b |
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decompressor = G_ZLIB_DECOMPRESSOR (object);
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ae235b |
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switch (prop_id)
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{
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case PROP_FORMAT:
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decompressor->format = g_value_get_enum (value);
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|
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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ae235b |
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ae235b |
}
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ae235b |
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ae235b |
static void
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g_zlib_decompressor_get_property (GObject *object,
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guint prop_id,
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ae235b |
GValue *value,
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ae235b |
GParamSpec *pspec)
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ae235b |
{
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GZlibDecompressor *decompressor;
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ae235b |
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decompressor = G_ZLIB_DECOMPRESSOR (object);
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switch (prop_id)
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{
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case PROP_FORMAT:
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g_value_set_enum (value, decompressor->format);
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break;
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ae235b |
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case PROP_FILE_INFO:
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if (decompressor->header_data)
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g_value_set_object (value, decompressor->header_data->file_info);
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else
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g_value_set_object (value, NULL);
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|
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break;
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|
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ae235b |
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ae235b |
default:
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|
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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|
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ae235b |
break;
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|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
}
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|
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ae235b |
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ae235b |
static void
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g_zlib_decompressor_init (GZlibDecompressor *decompressor)
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{
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|
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ae235b |
}
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ae235b |
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static void
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g_zlib_decompressor_constructed (GObject *object)
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{
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ae235b |
GZlibDecompressor *decompressor;
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|
Packit |
ae235b |
int res;
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|
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ae235b |
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|
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decompressor = G_ZLIB_DECOMPRESSOR (object);
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ae235b |
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|
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ae235b |
if (decompressor->format == G_ZLIB_COMPRESSOR_FORMAT_GZIP)
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|
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ae235b |
{
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|
Packit |
ae235b |
/* + 16 for gzip */
|
|
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ae235b |
res = inflateInit2 (&decompressor->zstream, MAX_WBITS + 16);
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|
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ae235b |
}
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|
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ae235b |
else if (decompressor->format == G_ZLIB_COMPRESSOR_FORMAT_RAW)
|
|
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ae235b |
{
|
|
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ae235b |
/* Negative for raw */
|
|
Packit |
ae235b |
res = inflateInit2 (&decompressor->zstream, -MAX_WBITS);
|
|
Packit |
ae235b |
}
|
|
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ae235b |
else /* ZLIB */
|
|
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ae235b |
res = inflateInit (&decompressor->zstream);
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|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (res == Z_MEM_ERROR )
|
|
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ae235b |
g_error ("GZlibDecompressor: Not enough memory for zlib use");
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|
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ae235b |
|
|
Packit |
ae235b |
if (res != Z_OK)
|
|
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ae235b |
g_warning ("unexpected zlib error: %s\n", decompressor->zstream.msg);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_zlib_decompressor_set_gzheader (decompressor);
|
|
Packit |
ae235b |
}
|
|
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ae235b |
|
|
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ae235b |
static void
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|
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ae235b |
g_zlib_decompressor_class_init (GZlibDecompressorClass *klass)
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|
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ae235b |
{
|
|
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ae235b |
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
gobject_class->finalize = g_zlib_decompressor_finalize;
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|
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ae235b |
gobject_class->constructed = g_zlib_decompressor_constructed;
|
|
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ae235b |
gobject_class->get_property = g_zlib_decompressor_get_property;
|
|
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ae235b |
gobject_class->set_property = g_zlib_decompressor_set_property;
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|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_object_class_install_property (gobject_class,
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|
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ae235b |
PROP_FORMAT,
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|
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ae235b |
g_param_spec_enum ("format",
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|
Packit |
ae235b |
P_("compression format"),
|
|
Packit |
ae235b |
P_("The format of the compressed data"),
|
|
Packit |
ae235b |
G_TYPE_ZLIB_COMPRESSOR_FORMAT,
|
|
Packit |
ae235b |
G_ZLIB_COMPRESSOR_FORMAT_ZLIB,
|
|
Packit |
ae235b |
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
|
|
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ae235b |
G_PARAM_STATIC_STRINGS));
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
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ae235b |
* GZlibDecompressor:file-info:
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* A #GFileInfo containing the information found in the GZIP header
|
|
Packit |
ae235b |
* of the data stream processed, or %NULL if the header was not yet
|
|
Packit |
ae235b |
* fully processed, is not present at all, or the compressor's
|
|
Packit |
ae235b |
* #GZlibDecompressor:format property is not %G_ZLIB_COMPRESSOR_FORMAT_GZIP.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Since: 2.26
|
|
Packit |
ae235b |
*/
|
|
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ae235b |
g_object_class_install_property (gobject_class,
|
|
Packit |
ae235b |
PROP_FILE_INFO,
|
|
Packit |
ae235b |
g_param_spec_object ("file-info",
|
|
Packit |
ae235b |
P_("file info"),
|
|
Packit |
ae235b |
P_("File info"),
|
|
Packit |
ae235b |
G_TYPE_FILE_INFO,
|
|
Packit |
ae235b |
G_PARAM_READABLE |
|
|
Packit |
ae235b |
G_PARAM_STATIC_STRINGS));
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_zlib_decompressor_new:
|
|
Packit |
ae235b |
* @format: The format to use for the compressed data
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Creates a new #GZlibDecompressor.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: a new #GZlibDecompressor
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Since: 2.24
|
|
Packit |
ae235b |
**/
|
|
Packit |
ae235b |
GZlibDecompressor *
|
|
Packit |
ae235b |
g_zlib_decompressor_new (GZlibCompressorFormat format)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GZlibDecompressor *decompressor;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
decompressor = g_object_new (G_TYPE_ZLIB_DECOMPRESSOR,
|
|
Packit |
ae235b |
"format", format,
|
|
Packit |
ae235b |
NULL);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return decompressor;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/**
|
|
Packit |
ae235b |
* g_zlib_decompressor_get_file_info:
|
|
Packit |
ae235b |
* @decompressor: a #GZlibDecompressor
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Retrieves the #GFileInfo constructed from the GZIP header data
|
|
Packit |
ae235b |
* of compressed data processed by @compressor, or %NULL if @decompressor's
|
|
Packit |
ae235b |
* #GZlibDecompressor:format property is not %G_ZLIB_COMPRESSOR_FORMAT_GZIP,
|
|
Packit |
ae235b |
* or the header data was not fully processed yet, or it not present in the
|
|
Packit |
ae235b |
* data stream at all.
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Returns: (transfer none): a #GFileInfo, or %NULL
|
|
Packit |
ae235b |
*
|
|
Packit |
ae235b |
* Since: 2.26
|
|
Packit |
ae235b |
*/
|
|
Packit |
ae235b |
GFileInfo *
|
|
Packit |
ae235b |
g_zlib_decompressor_get_file_info (GZlibDecompressor *decompressor)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
g_return_val_if_fail (G_IS_ZLIB_DECOMPRESSOR (decompressor), NULL);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (decompressor->header_data)
|
|
Packit |
ae235b |
return decompressor->header_data->file_info;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
return NULL;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_zlib_decompressor_reset (GConverter *converter)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
GZlibDecompressor *decompressor = G_ZLIB_DECOMPRESSOR (converter);
|
|
Packit |
ae235b |
int res;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
res = inflateReset (&decompressor->zstream);
|
|
Packit |
ae235b |
if (res != Z_OK)
|
|
Packit |
ae235b |
g_warning ("unexpected zlib error: %s\n", decompressor->zstream.msg);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_zlib_decompressor_set_gzheader (decompressor);
|
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}
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ae235b |
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static GConverterResult
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g_zlib_decompressor_convert (GConverter *converter,
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ae235b |
const void *inbuf,
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ae235b |
gsize inbuf_size,
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void *outbuf,
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gsize outbuf_size,
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GConverterFlags flags,
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gsize *bytes_read,
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gsize *bytes_written,
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GError **error)
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{
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ae235b |
GZlibDecompressor *decompressor;
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int res;
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ae235b |
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decompressor = G_ZLIB_DECOMPRESSOR (converter);
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ae235b |
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decompressor->zstream.next_in = (void *)inbuf;
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decompressor->zstream.avail_in = inbuf_size;
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ae235b |
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decompressor->zstream.next_out = outbuf;
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decompressor->zstream.avail_out = outbuf_size;
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ae235b |
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res = inflate (&decompressor->zstream, Z_NO_FLUSH);
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ae235b |
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if (res == Z_DATA_ERROR || res == Z_NEED_DICT)
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{
|
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g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_DATA,
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_("Invalid compressed data"));
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|
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return G_CONVERTER_ERROR;
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|
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ae235b |
}
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|
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ae235b |
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|
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ae235b |
if (res == Z_MEM_ERROR)
|
|
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ae235b |
{
|
|
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ae235b |
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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|
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ae235b |
_("Not enough memory"));
|
|
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ae235b |
return G_CONVERTER_ERROR;
|
|
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ae235b |
}
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|
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ae235b |
|
|
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ae235b |
if (res == Z_STREAM_ERROR)
|
|
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ae235b |
{
|
|
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ae235b |
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
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ae235b |
_("Internal error: %s"), decompressor->zstream.msg);
|
|
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ae235b |
return G_CONVERTER_ERROR;
|
|
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ae235b |
}
|
|
Packit |
ae235b |
|
|
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ae235b |
if (res == Z_BUF_ERROR)
|
|
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ae235b |
{
|
|
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ae235b |
if (flags & G_CONVERTER_FLUSH)
|
|
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ae235b |
return G_CONVERTER_FLUSHED;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* Z_FINISH not set, so this means no progress could be made */
|
|
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ae235b |
/* We do have output space, so this should only happen if we
|
|
Packit |
ae235b |
have no input but need some */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_PARTIAL_INPUT,
|
|
Packit |
ae235b |
_("Need more input"));
|
|
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ae235b |
return G_CONVERTER_ERROR;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
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ae235b |
g_assert (res == Z_OK || res == Z_STREAM_END);
|
|
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ae235b |
|
|
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ae235b |
*bytes_read = inbuf_size - decompressor->zstream.avail_in;
|
|
Packit |
ae235b |
*bytes_written = outbuf_size - decompressor->zstream.avail_out;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
#if !defined (G_OS_WIN32) || ZLIB_VERNUM >= 0x1240
|
|
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ae235b |
if (decompressor->header_data != NULL &&
|
|
Packit |
ae235b |
decompressor->header_data->gzheader.done == 1)
|
|
Packit |
ae235b |
{
|
|
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ae235b |
HeaderData *data = decompressor->header_data;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
/* So we don't notify again */
|
|
Packit |
ae235b |
data->gzheader.done = 2;
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
data->file_info = g_file_info_new ();
|
|
Packit |
ae235b |
g_file_info_set_attribute_uint64 (data->file_info,
|
|
Packit |
ae235b |
G_FILE_ATTRIBUTE_TIME_MODIFIED,
|
|
Packit |
ae235b |
data->gzheader.time);
|
|
Packit |
ae235b |
g_file_info_set_attribute_uint32 (data->file_info,
|
|
Packit |
ae235b |
G_FILE_ATTRIBUTE_TIME_MODIFIED_USEC,
|
|
Packit |
ae235b |
0);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (data->filename[0] != '\0')
|
|
Packit |
ae235b |
g_file_info_set_attribute_byte_string (data->file_info,
|
|
Packit |
ae235b |
G_FILE_ATTRIBUTE_STANDARD_NAME,
|
|
Packit |
ae235b |
data->filename);
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
g_object_notify (G_OBJECT (decompressor), "file-info");
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
#endif /* !G_OS_WIN32 || ZLIB >= 1.2.4 */
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
if (res == Z_STREAM_END)
|
|
Packit |
ae235b |
return G_CONVERTER_FINISHED;
|
|
Packit |
ae235b |
return G_CONVERTER_CONVERTED;
|
|
Packit |
ae235b |
}
|
|
Packit |
ae235b |
|
|
Packit |
ae235b |
static void
|
|
Packit |
ae235b |
g_zlib_decompressor_iface_init (GConverterIface *iface)
|
|
Packit |
ae235b |
{
|
|
Packit |
ae235b |
iface->convert = g_zlib_decompressor_convert;
|
|
Packit |
ae235b |
iface->reset = g_zlib_decompressor_reset;
|
|
Packit |
ae235b |
}
|