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gimp/plug-ins/common/gz.c

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/* The GIMP -- an image manipulation program
* 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 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.
*/
/* Minor changes to support file magic */
/* 4 Oct 1997 -- Risacher */
/* gzip plug-in for the gimp */
/* loosley 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> */
/* This is reads and writes gziped image files for the Gimp
*
* You need to have gzip installed for it to work.
*
* It should work with file names of the form
* filename.foo.gz where foo is some already-recognized extension
*
* and it also works for names of the form
* filename.xcfgz - which is equivalent to
* filename.xcf.gz
*
* 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 he/she 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 <stdlib.h>
#include <stdio.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 <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <errno.h>
#include <libgimp/gimp.h>
#ifdef G_OS_WIN32
#define STRICT
#define WinMain WinMain_foo
#include <windows.h>
#include <io.h> /* _get_osfhandle */
#undef WinMain
#endif
#include "libgimp/stdplugins-intl.h"
/* Author 1: Josh MacDonald (url.c) */
/* Author 2: Daniel Risacher (gz.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. */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint32 load_image (const gchar *filename,
gint32 run_mode,
GimpPDBStatusType *status /* return value */);
static GimpPDBStatusType save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
gint32 run_mode);
static gboolean valid_file (const gchar *filename);
static const gchar * find_extension (const gchar *filename);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
MAIN ()
static void
query (void)
{
static GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_STRING, "raw_filename", "The name entered" }
};
static GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" },
};
static GimpParamDef save_args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to save" },
{ GIMP_PDB_STRING, "filename", "The name of the file to save the image in" },
{ GIMP_PDB_STRING, "raw_filename", "The name of the file to save the image in" }
};
gimp_install_procedure ("file_gz_load",
"loads files compressed with gzip",
"You need to have gzip installed.",
"Daniel Risacher",
"Daniel Risacher, Spencer Kimball and Peter Mattis",
"1995-1997",
N_("gzip archive"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_plugin_menu_register ("file_gz_load", "<Load>");
gimp_register_file_handler_mime ("file_gz_load", "application/x-gzip");
gimp_register_magic_load_handler ("file_gz_load",
"gz,xcfgz",
"",
"0,string,\037\213");
gimp_install_procedure ("file_gz_save",
"saves files compressed with gzip",
"You need to have gzip installed.",
"Daniel Risacher",
"Daniel Risacher, Spencer Kimball and Peter Mattis",
"1995-1997",
N_("gzip archive"),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_file_handler_mime ("file_gz_save", "application/x-gzip");
gimp_register_save_handler ("file_gz_save",
"gz,xcfgz",
"");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 image_ID;
run_mode = param[0].data.d_int32;
INIT_I18N();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
if (strcmp (name, "file_gz_load") == 0)
{
image_ID = load_image (param[1].data.d_string,
param[0].data.d_int32,
&status);
if (image_ID != -1 &&
status == GIMP_PDB_SUCCESS)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
}
else if (strcmp (name, "file_gz_save") == 0)
{
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 4)
status = GIMP_PDB_CALLING_ERROR;
break;
case GIMP_RUN_WITH_LAST_VALS:
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
status = save_image (param[3].data.d_string,
param[1].data.d_int32,
param[2].data.d_int32,
param[0].data.d_int32);
}
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
values[0].data.d_status = status;
}
static GimpPDBStatusType
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
gint32 run_mode)
{
const gchar *ext;
gchar *tmpname;
#ifndef G_OS_WIN32
FILE *f;
gint pid;
gint wpid;
gint process_status;
#else
FILE *in;
FILE *out;
STARTUPINFO startupinfo;
PROCESS_INFORMATION processinfo;
#endif
if (NULL == (ext = find_extension (filename)))
{
g_message (_("No sensible extension, saving as compressed XCF."));
ext = ".xcf";
}
/* get a temp name with the right extension and save into it. */
tmpname = gimp_temp_name (ext + 1);
if (! (gimp_file_save (run_mode,
image_ID,
drawable_ID,
tmpname,
tmpname) && valid_file (tmpname)))
{
unlink (tmpname);
g_free (tmpname);
return GIMP_PDB_EXECUTION_ERROR;
}
#ifndef G_OS_WIN32
/* fork off a gzip process */
if ((pid = fork ()) < 0)
{
g_message ("fork() failed: %s", g_strerror (errno));
g_free (tmpname);
return GIMP_PDB_EXECUTION_ERROR;
}
else if (pid == 0)
{
if (!(f = fopen (filename, "w")))
{
g_message (_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
g_free (tmpname);
_exit (127);
}
/* make stdout for this process be the output file */
if (-1 == dup2 (fileno (f), fileno (stdout)))
g_message ("dup2() failed: %s", g_strerror (errno));
/* and gzip into it */
execlp ("gzip", "gzip", "-cfn", tmpname, NULL);
g_message ("execlp(\"gzip -cfn\") failed: %s", g_strerror (errno));
g_free (tmpname);
_exit(127);
}
else
{
wpid = waitpid (pid, &process_status, 0);
if ((wpid < 0)
|| !WIFEXITED (process_status)
|| (WEXITSTATUS (process_status) != 0))
{
g_message ("gzip exited abnormally on file '%s'",
gimp_filename_to_utf8 (tmpname));
g_free (tmpname);
return 0;
}
}
#else /* G_OS_WIN32 */
in = fopen (tmpname, "rb");
out = fopen (filename, "wb");
startupinfo.cb = sizeof (STARTUPINFO);
startupinfo.lpReserved = NULL;
startupinfo.lpDesktop = NULL;
startupinfo.lpTitle = NULL;
startupinfo.dwFlags =
STARTF_FORCEOFFFEEDBACK | STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
startupinfo.wShowWindow = SW_SHOWMINNOACTIVE;
startupinfo.cbReserved2 = 0;
startupinfo.lpReserved2 = NULL;
startupinfo.hStdInput = (HANDLE) _get_osfhandle (fileno (in));
startupinfo.hStdOutput = (HANDLE) _get_osfhandle (fileno (out));
startupinfo.hStdError = GetStdHandle (STD_ERROR_HANDLE);
if (!CreateProcess (NULL, "minigzip", NULL, NULL,
TRUE, NORMAL_PRIORITY_CLASS, NULL, NULL,
&startupinfo, &processinfo))
{
g_message ("CreateProcess failed. Minigzip.exe not in the path?");
g_free (tmpname);
_exit (127);
}
CloseHandle (processinfo.hThread);
WaitForSingleObject (processinfo.hProcess, INFINITE);
#endif /* G_OS_WIN32 */
unlink (tmpname);
g_free (tmpname);
return GIMP_PDB_SUCCESS;
}
static gint32
load_image (const gchar *filename,
gint32 run_mode,
GimpPDBStatusType *status /* return value */)
{
gint32 image_ID;
const gchar *ext;
gchar *tmpname;
#ifndef G_OS_WIN32
gint pid;
gint wpid;
gint process_status;
#else
FILE *in, *out;
SECURITY_ATTRIBUTES secattr;
STARTUPINFO startupinfo;
PROCESS_INFORMATION processinfo;
#endif
if (NULL == (ext = find_extension (filename)))
{
g_message (_("No sensible extension, attempting to load "
"with file magic."));
ext = ".foo";
}
/* find a temp name */
tmpname = gimp_temp_name (ext + 1);
#ifndef G_OS_WIN32
/* fork off a g(un)zip and wait for it */
if ((pid = fork ()) < 0)
{
g_message ("fork() failed: %s", g_strerror (errno));
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
else if (pid == 0) /* child process */
{
FILE *f;
if (! (f = fopen (tmpname, "w")))
{
g_message (_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (tmpname), g_strerror (errno));
g_free (tmpname);
_exit(127);
}
/* make stdout for this child process be the temp file */
if (-1 == dup2 (fileno (f), fileno (stdout)))
{
g_free (tmpname);
g_message ("dup2() failed: %s", g_strerror (errno));
}
/* and unzip into it */
execlp ("gzip", "gzip", "-cfd", filename, NULL);
g_message ("execlp(\"gzip -cfd\") failed: %s", g_strerror (errno));
g_free (tmpname);
_exit(127);
}
else /* parent process */
{
wpid = waitpid (pid, &process_status, 0);
if ((wpid < 0)
|| !WIFEXITED (process_status)
|| (WEXITSTATUS (process_status) != 0))
{
g_message ("gzip exited abnormally on file '%s'",
gimp_filename_to_utf8 (filename));
g_free (tmpname);
*status = GIMP_PDB_EXECUTION_ERROR;
return -1;
}
}
#else
in = fopen (filename, "rb");
out = fopen (tmpname, "wb");
startupinfo.cb = sizeof (STARTUPINFO);
startupinfo.lpReserved = NULL;
startupinfo.lpDesktop = NULL;
startupinfo.lpTitle = NULL;
startupinfo.dwFlags =
STARTF_FORCEOFFFEEDBACK | STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
startupinfo.wShowWindow = SW_SHOWMINNOACTIVE;
startupinfo.cbReserved2 = 0;
startupinfo.lpReserved2 = NULL;
startupinfo.hStdInput = (HANDLE) _get_osfhandle (fileno (in));
startupinfo.hStdOutput = (HANDLE) _get_osfhandle (fileno (out));
startupinfo.hStdError = GetStdHandle (STD_ERROR_HANDLE);
if (!CreateProcess (NULL, "minigzip -d", NULL, NULL,
TRUE, NORMAL_PRIORITY_CLASS, NULL, NULL,
&startupinfo, &processinfo))
{
g_message ("CreateProcess failed: %d", GetLastError ());
g_free (tmpname);
_exit (127);
}
CloseHandle (processinfo.hThread);
WaitForSingleObject (processinfo.hProcess, INFINITE);
fclose (in);
fclose (out);
#endif /* G_OS_WIN32 */
/* now that we un-gziped it, load the temp file */
image_ID = gimp_file_load (run_mode, tmpname, tmpname);
unlink (tmpname);
g_free (tmpname);
if (image_ID != -1)
{
*status = GIMP_PDB_SUCCESS;
gimp_image_set_filename (image_ID, filename);
}
else
*status = GIMP_PDB_EXECUTION_ERROR;
return image_ID;
}
static gboolean
valid_file (const gchar *filename)
{
gint stat_res;
struct stat buf;
stat_res = stat(filename, &buf);
if ((0 == stat_res) && (buf.st_size > 0))
return TRUE;
else
return FALSE;
}
static const gchar *
find_extension (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, '/'))
{
return NULL;
}
if (0 == g_ascii_strcasecmp (ext, ".xcfgz"))
{
return ".xcf"; /* we've found it */
}
if (0 != g_ascii_strcasecmp (ext,".gz"))
{
return ext;
}
else
{
/* we found ".gz" so strip it, loop back, and look again */
*ext = '\0';
ext = strrchr (filename_copy, '.');
}
}
}
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