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PIKApp/plug-ins/common/file-compressor.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 1997 Daniel Risacher, magnus@alum.mit.edu
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
/* Minor changes to support file magic */
/* 4 Oct 1997 -- Risacher */
/* compressor plug-in for PIKA */
/* based on gz.c which in turn is */
/* loosely based on url.c by */
/* Josh MacDonald, jmacd@cs.berkeley.edu */
/* and, very loosely on hrz.c by */
/* Albert Cahalan <acahalan at cs.uml.edu> */
/* LZMA compression code is based on code by Lasse Collin which was
* placed in the public-domain. */
/* This is reads and writes compressed image files for PIKA
*
* It should work with file names of the form
* filename.foo.[gz|bz2] where foo is some already-recognized extension
*
* and it also works for names of the form
* filename.xcf[gz|bz2] - which is equivalent to
* filename.xcf.[gz|bz2]
*
* I added the xcfgz bit because having a default extension of xcf.gz
* can confuse the file selection dialog box somewhat, forcing the
* user to type sometimes when they otherwise wouldn't need to.
*
* I later decided I didn't like it because I don't like to bloat
* the file-extension namespace. But I left in the recognition
* feature/bug so if people want to use files named foo.xcfgz by
* default, they can just hack their pluginrc file.
*
* to do this hack, change :
* "xcf.gz,gz,xcfgz"
* to
* "xcfgz,gz,xcf.gz"
*
*
* -Dan Risacher, 0430 CDT, 26 May 1997
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <sys/stat.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib/gstdio.h>
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include <libpika/pika.h>
#include "libpika/stdplugins-intl.h"
#include <zlib.h>
#include <bzlib.h>
#include <lzma.h>
/* Author 1: Josh MacDonald (url.c) */
/* Author 2: Daniel Risacher (gz.c) */
/* Author 3: Michael Natterer (compressor.c) */
/* According to USAF Lt Steve Werhle, US DoD software development
* contracts average about $25 USD per source line of code (SLOC). By
* that metric, I figure this plug-in is worth about $10,000 USD */
/* But you got it free. Magic of Gnu. */
typedef gboolean (* LoadFn) (GFile *infile,
GFile *outfile);
typedef gboolean (* SaveFn) (GFile *infile,
GFile *outfile);
typedef struct _CompressorEntry CompressorEntry;
struct _CompressorEntry
{
const gchar *file_type;
const gchar *mime_type;
const gchar *extensions;
const gchar *magic;
const gchar *xcf_extension;
const gchar *generic_extension;
const gchar *load_proc;
const gchar *load_blurb;
const gchar *load_help;
LoadFn load_fn;
const gchar *save_proc;
const gchar *save_blurb;
const gchar *save_help;
SaveFn save_fn;
};
typedef struct _Compressor Compressor;
typedef struct _CompressorClass CompressorClass;
struct _Compressor
{
PikaPlugIn parent_instance;
};
struct _CompressorClass
{
PikaPlugInClass parent_class;
};
#define COMPRESSOR_TYPE (compressor_get_type ())
#define COMPRESSOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), COMPRESSOR_TYPE, Compressor))
GType compressor_get_type (void) G_GNUC_CONST;
static GList * compressor_query_procedures (PikaPlugIn *plug_in);
static PikaProcedure * compressor_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * compressor_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
PikaMetadata *metadata,
PikaProcedureConfig *config,
gpointer run_data);
static PikaValueArray * compressor_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
PikaMetadata *metadata,
PikaMetadataLoadFlags *flags,
PikaProcedureConfig *config,
gpointer run_data);
static PikaImage * load_image (const CompressorEntry *compressor,
GFile *file,
gint32 run_mode,
PikaPDBStatusType *status,
GError **error);
static PikaPDBStatusType save_image (const CompressorEntry *compressor,
GFile *file,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
gint32 run_mode,
GError **error);
static gboolean valid_file (GFile *file);
static const gchar * find_extension (const CompressorEntry *compressor,
const gchar *filename);
static gboolean gzip_load (GFile *infile,
GFile *outfile);
static gboolean gzip_save (GFile *infile,
GFile *outfile);
static gboolean bzip2_load (GFile *infile,
GFile *outfile);
static gboolean bzip2_save (GFile *infile,
GFile *outfile);
static gboolean xz_load (GFile *infile,
GFile *outfile);
static gboolean xz_save (GFile *infile,
GFile *outfile);
static goffset get_file_info (GFile *file);
G_DEFINE_TYPE (Compressor, compressor, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (COMPRESSOR_TYPE)
DEFINE_STD_SET_I18N
static const CompressorEntry compressors[] =
{
{
N_("gzip archive"),
"application/x-gzip",
"xcf.gz,xcfgz", /* FIXME "xcf.gz,gz,xcfgz" */
"0,string,\037\213",
".xcfgz",
".gz",
"file-gz-load",
"loads files compressed with gzip",
"This procedure loads files in the gzip compressed format.",
gzip_load,
"file-gz-save",
"saves files compressed with gzip",
"This procedure saves files in the gzip compressed format.",
gzip_save
},
{
N_("bzip archive"),
"application/x-bzip",
"xcf.bz2,xcfbz2", /* FIXME "xcf.bz2,bz2,xcfbz2" */
"0,string,BZh",
".xcfbz2",
".bz2",
"file-bz2-load",
"loads files compressed with bzip2",
"This procedure loads files in the bzip2 compressed format.",
bzip2_load,
"file-bz2-save",
"saves files compressed with bzip2",
"This procedure saves files in the bzip2 compressed format.",
bzip2_save
},
{
N_("xz archive"),
"application/x-xz",
"xcf.xz,xcfxz", /* FIXME "xcf.xz,xz,xcfxz" */
"0,string,\3757zXZ\x00",
".xcfxz",
".xz",
"file-xz-load",
"loads files compressed with xz",
"This procedure loads files in the xz compressed format.",
xz_load,
"file-xz-save",
"saves files compressed with xz",
"This procedure saves files in the xz compressed format.",
xz_save
}
};
static void
compressor_class_init (CompressorClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = compressor_query_procedures;
plug_in_class->create_procedure = compressor_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
compressor_init (Compressor *compressor)
{
}
static GList *
compressor_query_procedures (PikaPlugIn *plug_in)
{
GList *list = NULL;
gint i;
for (i = 0; i < G_N_ELEMENTS (compressors); i++)
{
const CompressorEntry *compressor = &compressors[i];
list = g_list_append (list, g_strdup (compressor->load_proc));
list = g_list_append (list, g_strdup (compressor->save_proc));
}
return list;
}
static PikaProcedure *
compressor_create_procedure (PikaPlugIn *plug_in,
const gchar *name)
{
PikaProcedure *procedure = NULL;
gint i;
for (i = 0; i < G_N_ELEMENTS (compressors); i++)
{
const CompressorEntry *compressor = &compressors[i];
if (! strcmp (name, compressor->load_proc))
{
procedure = pika_load_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
compressor_load,
(gpointer) compressor, NULL);
pika_procedure_set_documentation (procedure,
compressor->load_blurb,
compressor->load_help,
name);
pika_file_procedure_set_magics (PIKA_FILE_PROCEDURE (procedure),
compressor->magic);
}
else if (! strcmp (name, compressor->save_proc))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
FALSE, compressor_save,
(gpointer) compressor, NULL);
pika_procedure_set_image_types (procedure, "RGB*, GRAY*, INDEXED*");
pika_procedure_set_documentation (procedure,
compressor->save_blurb,
compressor->save_help,
name);
}
if (procedure)
{
pika_procedure_set_menu_label (procedure, compressor->file_type);
pika_procedure_set_attribution (procedure,
"Daniel Risacher",
"Daniel Risacher, Spencer Kimball "
"and Peter Mattis",
"1995-1997");
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
compressor->mime_type);
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
compressor->extensions);
return procedure;
}
}
return NULL;
}
static PikaValueArray *
compressor_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
PikaMetadata *metadata,
PikaMetadataLoadFlags *flags,
PikaProcedureConfig *config,
gpointer run_data)
{
const CompressorEntry *compressor = run_data;
PikaValueArray *return_vals;
PikaPDBStatusType status;
PikaImage *image;
GError *error = NULL;
/* We handle PDB errors by forwarding them to the caller in
* our return values.
*/
pika_plug_in_set_pdb_error_handler (pika_procedure_get_plug_in (procedure),
PIKA_PDB_ERROR_HANDLER_PLUGIN);
image = load_image (compressor, file, run_mode,
&status, &error);
return_vals = pika_procedure_new_return_values (procedure, status, error);
if (image && status == PIKA_PDB_SUCCESS)
PIKA_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static PikaValueArray *
compressor_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
PikaMetadata *metadata,
PikaProcedureConfig *config,
gpointer run_data)
{
const CompressorEntry *compressor = run_data;
PikaPDBStatusType status;
GError *error = NULL;
/* We handle PDB errors by forwarding them to the caller in
* our return values.
*/
pika_plug_in_set_pdb_error_handler (pika_procedure_get_plug_in (procedure),
PIKA_PDB_ERROR_HANDLER_PLUGIN);
status = save_image (compressor, file, image, n_drawables, drawables,
run_mode, &error);
return pika_procedure_new_return_values (procedure, status, error);
}
static PikaPDBStatusType
save_image (const CompressorEntry *compressor,
GFile *file,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
gint32 run_mode,
GError **error)
{
const gchar *ext;
GFile *tmp_file;
ext = find_extension (compressor, g_file_peek_path (file));
if (! ext)
{
g_message (_("No sensible file extension, saving as compressed XCF."));
ext = ".xcf";
}
/* get a temp name with the right extension and save into it. */
tmp_file = pika_temp_file (ext + 1);
if (! (pika_file_save (run_mode,
image,
n_drawables,
(const PikaItem **) drawables,
tmp_file) &&
valid_file (tmp_file)))
{
g_file_delete (tmp_file, NULL, NULL);
g_object_unref (tmp_file);
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s", pika_pdb_get_last_error (pika_get_pdb ()));
return PIKA_PDB_EXECUTION_ERROR;
}
pika_progress_init_printf (_("Compressing '%s'"),
pika_file_get_utf8_name (file));
if (! compressor->save_fn (tmp_file, file))
{
g_file_delete (tmp_file, NULL, NULL);
g_object_unref (tmp_file);
return PIKA_PDB_EXECUTION_ERROR;
}
g_file_delete (tmp_file, NULL, NULL);
g_object_unref (tmp_file);
pika_progress_update (1.0);
/* ask the core to save a thumbnail for compressed XCF files */
if (strcmp (ext, ".xcf") == 0)
pika_file_save_thumbnail (image, file);
return PIKA_PDB_SUCCESS;
}
static PikaImage *
load_image (const CompressorEntry *compressor,
GFile *file,
gint32 run_mode,
PikaPDBStatusType *status,
GError **error)
{
PikaImage *image;
const gchar *ext;
GFile *tmp_file;
ext = find_extension (compressor, g_file_peek_path (file));
if (! ext)
{
g_message (_("No sensible file extension, "
"attempting to load with file magic."));
ext = ".foo";
}
/* find a temp name */
tmp_file = pika_temp_file (ext + 1);
if (! compressor->load_fn (file, tmp_file))
{
g_object_unref (tmp_file);
*status = PIKA_PDB_EXECUTION_ERROR;
return NULL;
}
/* now that we uncompressed it, load the temp file */
image = pika_file_load (run_mode, tmp_file);
g_file_delete (tmp_file, NULL, NULL);
g_object_unref (tmp_file);
if (image)
{
*status = PIKA_PDB_SUCCESS;
pika_image_set_file (image, file);
}
else
{
/* Forward the return status of the underlining plug-in for the
* given format.
*/
*status = pika_pdb_get_last_status (pika_get_pdb ());
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s", pika_pdb_get_last_error (pika_get_pdb ()));
}
return image;
}
static gboolean
valid_file (GFile *file)
{
GStatBuf buf;
gboolean valid;
valid = g_stat (g_file_peek_path (file), &buf) == 0 && buf.st_size > 0;
return valid;
}
static const gchar *
find_extension (const CompressorEntry *compressor,
const gchar *filename)
{
gchar *filename_copy;
gchar *ext;
/* we never free this copy - aren't we evil! */
filename_copy = g_strdup (filename);
/* find the extension, boy! */
ext = strrchr (filename_copy, '.');
while (TRUE)
{
if (!ext || ext[1] == '\0' || strchr (ext, G_DIR_SEPARATOR))
{
return NULL;
}
if (0 == g_ascii_strcasecmp (ext, compressor->xcf_extension))
{
return ".xcf"; /* we've found it */
}
if (0 != g_ascii_strcasecmp (ext, compressor->generic_extension))
{
return ext;
}
else
{
/* we found ".gz" so strip it, loop back, and look again */
*ext = '\0';
ext = strrchr (filename_copy, '.');
}
}
}
static gboolean
gzip_load (GFile *infile,
GFile *outfile)
{
gboolean ret;
int fd;
gzFile in;
FILE *out;
char buf[16384];
int len;
ret = FALSE;
in = NULL;
out = NULL;
fd = g_open (g_file_peek_path (infile), O_RDONLY | _O_BINARY, 0);
if (fd == -1)
goto out;
in = gzdopen (fd, "rb");
if (! in)
{
close (fd);
goto out;
}
out = g_fopen (g_file_peek_path (outfile), "wb");
if (! out)
goto out;
while (TRUE)
{
len = gzread (in, buf, sizeof buf);
if (len < 0)
break;
else if (len == 0)
{
ret = TRUE;
break;
}
if (fwrite(buf, 1, len, out) != len)
break;
}
out:
/* There is no need to close(fd) as it is closed by gzclose(). */
if (in)
if (gzclose (in) != Z_OK)
ret = FALSE;
if (out)
fclose (out);
return ret;
}
static gboolean
gzip_save (GFile *infile,
GFile *outfile)
{
gboolean ret;
FILE *in;
int fd;
gzFile out;
char buf[16384];
int len;
goffset tot = 0, file_size;
ret = FALSE;
in = NULL;
out = NULL;
in = g_fopen (g_file_peek_path (infile), "rb");
if (! in)
goto out;
fd = g_open (g_file_peek_path (outfile), O_CREAT | O_WRONLY | O_TRUNC | _O_BINARY, 0664);
if (fd == -1)
goto out;
out = gzdopen (fd, "wb");
if (! out)
{
close (fd);
goto out;
}
file_size = get_file_info (infile);
while (TRUE)
{
len = fread (buf, 1, sizeof buf, in);
if (ferror (in))
break;
if (len < 0)
break;
else if (len == 0)
{
ret = TRUE;
break;
}
if (gzwrite (out, buf, len) != len)
break;
pika_progress_update ((tot += len) * 1.0 / file_size);
}
out:
if (in)
fclose (in);
/* There is no need to close(fd) as it is closed by gzclose(). */
if (out)
if (gzclose (out) != Z_OK)
ret = FALSE;
return ret;
}
static gboolean
bzip2_load (GFile *infile,
GFile *outfile)
{
gboolean ret;
int fd;
BZFILE *in;
FILE *out;
char buf[16384];
int len;
ret = FALSE;
in = NULL;
out = NULL;
fd = g_open (g_file_peek_path (infile), O_RDONLY | _O_BINARY, 0);
if (fd == -1)
goto out;
in = BZ2_bzdopen (fd, "rb");
if (!in)
{
close (fd);
goto out;
}
out = g_fopen (g_file_peek_path (outfile), "wb");
if (!out)
goto out;
while (TRUE)
{
len = BZ2_bzread (in, buf, sizeof buf);
if (len < 0)
break;
else if (len == 0)
{
ret = TRUE;
break;
}
if (fwrite(buf, 1, len, out) != len)
break;
}
out:
/* TODO: Check this in the case of BZ2_bzclose(): */
/* There is no need to close(fd) as it is closed by BZ2_bzclose(). */
if (in)
BZ2_bzclose (in);
if (out)
fclose (out);
return ret;
}
static gboolean
bzip2_save (GFile *infile,
GFile *outfile)
{
gboolean ret;
FILE *in;
int fd;
BZFILE *out;
char buf[16384];
int len;
goffset tot = 0, file_size;
ret = FALSE;
in = NULL;
out = NULL;
in = g_fopen (g_file_peek_path (infile), "rb");
if (!in)
goto out;
fd = g_open (g_file_peek_path (outfile), O_CREAT | O_WRONLY | O_TRUNC | _O_BINARY, 0664);
if (fd == -1)
goto out;
out = BZ2_bzdopen (fd, "wb");
if (!out)
{
close (fd);
goto out;
}
file_size = get_file_info (infile);
while (TRUE)
{
len = fread (buf, 1, sizeof buf, in);
if (ferror (in))
break;
if (len < 0)
break;
else if (len == 0)
{
ret = TRUE;
break;
}
if (BZ2_bzwrite (out, buf, len) != len)
break;
pika_progress_update ((tot += len) * 1.0 / file_size);
}
out:
if (in)
fclose (in);
/* TODO: Check this in the case of BZ2_bzclose(): */
/* There is no need to close(fd) as it is closed by BZ2_bzclose(). */
if (out)
BZ2_bzclose (out);
return ret;
}
static gboolean
xz_load (GFile *infile,
GFile *outfile)
{
gboolean ret;
FILE *in;
FILE *out;
lzma_stream strm = LZMA_STREAM_INIT;
lzma_action action;
guint8 inbuf[BUFSIZ];
guint8 outbuf[BUFSIZ];
lzma_ret status;
ret = FALSE;
in = NULL;
out = NULL;
in = g_fopen (g_file_peek_path (infile), "rb");
if (!in)
goto out;
out = g_fopen (g_file_peek_path (outfile), "wb");
if (!out)
goto out;
if (lzma_stream_decoder (&strm, UINT64_MAX, 0) != LZMA_OK)
goto out;
strm.next_in = NULL;
strm.avail_in = 0;
strm.next_out = outbuf;
strm.avail_out = sizeof outbuf;
action = LZMA_RUN;
status = LZMA_OK;
while (status == LZMA_OK)
{
/* Fill the input buffer if it is empty. */
if ((strm.avail_in == 0) && (!feof(in)))
{
strm.next_in = inbuf;
strm.avail_in = fread (inbuf, 1, sizeof inbuf, in);
if (ferror (in))
goto out;
/* Once the end of the input file has been reached, we need to
tell lzma_code() that no more input will be coming and that
it should finish the encoding. */
if (feof (in))
action = LZMA_FINISH;
}
status = lzma_code (&strm, action);
if ((strm.avail_out == 0) || (status == LZMA_STREAM_END))
{
/* When lzma_code() has returned LZMA_STREAM_END, the output
buffer is likely to be only partially full. Calculate how
much new data there is to be written to the output file. */
size_t write_size = sizeof outbuf - strm.avail_out;
if (fwrite (outbuf, 1, write_size, out) != write_size)
goto out;
/* Reset next_out and avail_out. */
strm.next_out = outbuf;
strm.avail_out = sizeof outbuf;
}
}
if (status != LZMA_STREAM_END)
goto out;
lzma_end (&strm);
ret = TRUE;
out:
if (in)
fclose (in);
if (out)
fclose (out);
return ret;
}
static gboolean
xz_save (GFile *infile,
GFile *outfile)
{
gboolean ret;
FILE *in;
FILE *out;
lzma_stream strm = LZMA_STREAM_INIT;
lzma_action action;
guint8 inbuf[BUFSIZ];
guint8 outbuf[BUFSIZ];
lzma_ret status;
goffset tot = 0, file_size;
ret = FALSE;
in = NULL;
out = NULL;
in = g_fopen (g_file_peek_path (infile), "rb");
if (!in)
goto out;
file_size = get_file_info (infile);
out = g_fopen (g_file_peek_path (outfile), "wb");
if (!out)
goto out;
if (lzma_easy_encoder (&strm,
LZMA_PRESET_DEFAULT,
LZMA_CHECK_CRC64) != LZMA_OK)
goto out;
strm.next_in = NULL;
strm.avail_in = 0;
strm.next_out = outbuf;
strm.avail_out = sizeof outbuf;
action = LZMA_RUN;
status = LZMA_OK;
while (status == LZMA_OK)
{
/* Fill the input buffer if it is empty. */
if ((strm.avail_in == 0) && (!feof(in)))
{
strm.next_in = inbuf;
strm.avail_in = fread (inbuf, 1, sizeof inbuf, in);
if (ferror (in))
goto out;
/* Once the end of the input file has been reached, we need to
tell lzma_code() that no more input will be coming and that
it should finish the encoding. */
if (feof (in))
action = LZMA_FINISH;
pika_progress_update ((tot += strm.avail_in) * 1.0 / file_size);
}
status = lzma_code (&strm, action);
if ((strm.avail_out == 0) || (status == LZMA_STREAM_END))
{
/* When lzma_code() has returned LZMA_STREAM_END, the output
buffer is likely to be only partially full. Calculate how
much new data there is to be written to the output file. */
size_t write_size = sizeof outbuf - strm.avail_out;
if (fwrite (outbuf, 1, write_size, out) != write_size)
goto out;
/* Reset next_out and avail_out. */
strm.next_out = outbuf;
strm.avail_out = sizeof outbuf;
}
}
if (status != LZMA_STREAM_END)
goto out;
lzma_end (&strm);
ret = TRUE;
out:
if (in)
fclose (in);
if (out)
fclose (out);
return ret;
}
/* get file size from a filename */
static goffset
get_file_info (GFile *file)
{
GFileInfo *info;
goffset size = 1;
info = g_file_query_info (file,
G_FILE_ATTRIBUTE_STANDARD_SIZE,
G_FILE_QUERY_INFO_NONE,
NULL, NULL);
if (info)
{
size = g_file_info_get_attribute_uint64 (info, G_FILE_ATTRIBUTE_STANDARD_SIZE);
g_object_unref (info);
}
return size;
}
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