493 lines
13 KiB
C
493 lines
13 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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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 3 of the License, or
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* (at your option) 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, see <https://www.gnu.org/licenses/>.
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*/
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/* The idea is taken from a plug-in written by George Hartz; the code isn't.
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*/
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#include "config.h"
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#include <string.h>
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#include "libpika/pika.h"
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#define PLUG_IN_PROC "file-glob"
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typedef struct _Glob Glob;
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typedef struct _GlobClass GlobClass;
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struct _Glob
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{
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PikaPlugIn parent_instance;
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};
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struct _GlobClass
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{
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PikaPlugInClass parent_class;
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};
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#define GLOB_TYPE (glob_get_type ())
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#define GLOB(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GLOB_TYPE, Glob))
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GType glob_get_type (void) G_GNUC_CONST;
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static GList * glob_query_procedures (PikaPlugIn *plug_in);
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static PikaProcedure * glob_create_procedure (PikaPlugIn *plug_in,
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const gchar *name);
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static PikaValueArray * glob_run (PikaProcedure *procedure,
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PikaProcedureConfig *config,
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gpointer run_data);
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static gboolean glob_match (const gchar *pattern,
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gboolean filename_encoding,
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gchar ***matches);
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static gboolean glob_fnmatch (const gchar *pattern,
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const gchar *string);
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G_DEFINE_TYPE (Glob, glob, PIKA_TYPE_PLUG_IN)
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PIKA_MAIN (GLOB_TYPE)
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static void
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glob_class_init (GlobClass *klass)
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{
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PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
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plug_in_class->query_procedures = glob_query_procedures;
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plug_in_class->create_procedure = glob_create_procedure;
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plug_in_class->set_i18n = NULL;
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}
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static void
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glob_init (Glob *glob)
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{
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}
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static GList *
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glob_query_procedures (PikaPlugIn *plug_in)
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{
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return g_list_append (NULL, g_strdup (PLUG_IN_PROC));
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}
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static PikaProcedure *
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glob_create_procedure (PikaPlugIn *plug_in,
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const gchar *name)
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{
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PikaProcedure *procedure = NULL;
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if (! strcmp (name, PLUG_IN_PROC))
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{
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procedure = pika_procedure_new (plug_in, name,
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PIKA_PDB_PROC_TYPE_PLUGIN,
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glob_run, NULL, NULL);
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pika_procedure_set_documentation (procedure,
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"Returns a list of matching filenames",
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"This can be useful in scripts and "
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"other plug-ins (e.g., "
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"batch-conversion). See the glob(7) "
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"manpage for more info. Note however "
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"that this isn't a full-featured glob "
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"implementation. It only handles "
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"simple patterns like "
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"\"/home/foo/bar/*.jpg\".",
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name);
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pika_procedure_set_attribution (procedure,
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"Sven Neumann",
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"Sven Neumann",
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"2004");
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PIKA_PROC_ARG_STRING (procedure, "pattern",
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"Pattern",
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"The glob pattern (in UTF-8 encoding)",
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NULL,
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G_PARAM_READWRITE);
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PIKA_PROC_ARG_BOOLEAN (procedure, "filename-encoding",
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"Filename encoding",
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"FALSE to return UTF-8 strings, TRUE to return "
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"strings in filename encoding",
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FALSE,
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G_PARAM_READWRITE);
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PIKA_PROC_VAL_STRV (procedure, "files",
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"Files",
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"The list of matching filenames",
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G_PARAM_READWRITE |
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PIKA_PARAM_NO_VALIDATE);
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}
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return procedure;
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}
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static PikaValueArray *
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glob_run (PikaProcedure *procedure,
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PikaProcedureConfig *config,
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gpointer run_data)
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{
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PikaValueArray *return_vals;
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gchar *pattern;
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gboolean filename_encoding;
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gchar **matches;
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g_object_get (config,
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"pattern", &pattern,
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"filename-encoding", &filename_encoding,
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NULL);
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if (! glob_match (pattern, filename_encoding, &matches))
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{
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return_vals = pika_procedure_new_return_values (procedure,
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PIKA_PDB_EXECUTION_ERROR,
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NULL);
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}
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else
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{
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return_vals = pika_procedure_new_return_values (procedure,
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PIKA_PDB_SUCCESS,
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NULL);
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PIKA_VALUES_TAKE_STRV (return_vals, 1, matches);
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}
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g_free (pattern);
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return return_vals;
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}
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static gboolean
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glob_match (const gchar *pattern,
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gboolean filename_encoding,
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gchar ***matches)
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{
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GDir *dir;
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GPtrArray *array;
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const gchar *filename;
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gchar *dirname;
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gchar *tmp;
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g_return_val_if_fail (pattern != NULL, FALSE);
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g_return_val_if_fail (matches != NULL, FALSE);
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*matches = NULL;
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/* This is not a complete glob() implementation but rather a very
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* simplistic approach. However it works for the most common use
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* case and is better than nothing.
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*/
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tmp = g_filename_from_utf8 (pattern, -1, NULL, NULL, NULL);
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if (! tmp)
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return FALSE;
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dirname = g_path_get_dirname (tmp);
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dir = g_dir_open (dirname, 0, NULL);
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g_free (tmp);
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if (! dir)
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{
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g_free (dirname);
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return TRUE;
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}
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/* check if the pattern has a directory part at all */
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tmp = g_path_get_basename (pattern);
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if (strcmp (pattern, tmp) == 0)
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{
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g_free (dirname);
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dirname = NULL;
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}
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g_free (tmp);
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array = g_ptr_array_new ();
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for (filename = g_dir_read_name (dir);
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filename;
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filename = g_dir_read_name (dir))
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{
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gchar *path;
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gchar *name;
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if (dirname)
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path = g_build_filename (dirname, filename, NULL);
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else
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path = g_strdup (filename);
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name = g_filename_to_utf8 (path, -1, NULL, NULL, NULL);
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if (name && glob_fnmatch (pattern, name))
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{
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if (filename_encoding)
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{
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g_ptr_array_add (array, path);
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path = NULL;
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}
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else
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{
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g_ptr_array_add (array, name);
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name = NULL;
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}
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}
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g_free (path);
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g_free (name);
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}
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g_dir_close (dir);
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g_free (dirname);
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/* NULL-terminator */
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g_ptr_array_add (array, NULL);
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*matches = (gchar **) g_ptr_array_free (array, FALSE);
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return TRUE;
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}
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/*
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* The following code is borrowed from GTK+.
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*
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* GTK+ used to use a old version of GNU fnmatch() that was buggy
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* in various ways and didn't handle UTF-8. The following is
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* converted to UTF-8. To simplify the process of making it
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* correct, this is special-cased to the combinations of flags
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* that gtkfilesel.c uses.
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*
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* FNM_FILE_NAME - always set
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* FNM_LEADING_DIR - never set
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* FNM_NOESCAPE - set only on windows
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* FNM_CASEFOLD - set only on windows
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*/
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/* We need to make sure that all constants are defined
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* to properly compile this file
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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static gunichar
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get_char (const char **str)
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{
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gunichar c = g_utf8_get_char (*str);
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*str = g_utf8_next_char (*str);
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#ifdef G_PLATFORM_WIN32
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c = g_unichar_tolower (c);
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#endif
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return c;
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}
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#if defined(G_OS_WIN32) || defined(G_WITH_CYGWIN)
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#define DO_ESCAPE 0
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#else
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#define DO_ESCAPE 1
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#endif
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static gunichar
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get_unescaped_char (const char **str,
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gboolean *was_escaped)
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{
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gunichar c = get_char (str);
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*was_escaped = DO_ESCAPE && c == '\\';
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if (*was_escaped)
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c = get_char (str);
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return c;
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}
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/* Match STRING against the filename pattern PATTERN,
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* returning TRUE if it matches, FALSE otherwise.
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*/
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static gboolean
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fnmatch_intern (const gchar *pattern,
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const gchar *string,
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gboolean component_start,
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gboolean no_leading_period)
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{
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const char *p = pattern, *n = string;
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while (*p)
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{
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const char *last_n = n;
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gunichar c = get_char (&p);
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gunichar nc = get_char (&n);
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switch (c)
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{
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case '?':
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if (nc == '\0')
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return FALSE;
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else if (nc == G_DIR_SEPARATOR)
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return FALSE;
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else if (nc == '.' && component_start && no_leading_period)
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return FALSE;
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break;
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case '\\':
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if (DO_ESCAPE)
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c = get_char (&p);
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if (nc != c)
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return FALSE;
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break;
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case '*':
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if (nc == '.' && component_start && no_leading_period)
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return FALSE;
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{
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const char *last_p = p;
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for (last_p = p, c = get_char (&p);
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c == '?' || c == '*';
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last_p = p, c = get_char (&p))
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{
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if (c == '?')
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{
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if (nc == '\0')
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return FALSE;
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else if (nc == G_DIR_SEPARATOR)
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return FALSE;
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else
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{
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last_n = n; nc = get_char (&n);
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}
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}
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}
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/* If the pattern ends with wildcards, we have a
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* guaranteed match unless there is a dir separator
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* in the remainder of the string.
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*/
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if (c == '\0')
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{
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if (strchr (last_n, G_DIR_SEPARATOR) != NULL)
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return FALSE;
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else
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return TRUE;
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}
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if (DO_ESCAPE && c == '\\')
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c = get_char (&p);
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for (p = last_p; nc != '\0';)
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{
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if ((c == '[' || nc == c) &&
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fnmatch_intern (p, last_n,
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component_start, no_leading_period))
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return TRUE;
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component_start = (nc == G_DIR_SEPARATOR);
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last_n = n;
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nc = get_char (&n);
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}
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return FALSE;
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}
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case '[':
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{
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/* Nonzero if the sense of the character class is inverted. */
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gboolean not;
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gboolean was_escaped;
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if (nc == '\0' || nc == G_DIR_SEPARATOR)
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return FALSE;
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if (nc == '.' && component_start && no_leading_period)
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return FALSE;
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not = (*p == '!' || *p == '^');
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if (not)
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++p;
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c = get_unescaped_char (&p, &was_escaped);
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for (;;)
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{
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register gunichar cstart = c, cend = c;
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if (c == '\0')
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/* [ (unterminated) loses. */
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return FALSE;
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c = get_unescaped_char (&p, &was_escaped);
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if (!was_escaped && c == '-' && *p != ']')
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{
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cend = get_unescaped_char (&p, &was_escaped);
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if (cend == '\0')
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return FALSE;
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c = get_char (&p);
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}
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if (nc >= cstart && nc <= cend)
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goto matched;
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if (!was_escaped && c == ']')
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break;
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}
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if (!not)
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return FALSE;
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break;
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matched:;
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/* Skip the rest of the [...] that already matched. */
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/* XXX 1003.2d11 is unclear if was_escaped is right. */
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while (was_escaped || c != ']')
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{
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if (c == '\0')
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/* [... (unterminated) loses. */
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return FALSE;
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c = get_unescaped_char (&p, &was_escaped);
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}
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if (not)
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return FALSE;
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}
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break;
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default:
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if (c != nc)
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return FALSE;
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}
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component_start = (nc == G_DIR_SEPARATOR);
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}
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if (*n == '\0')
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return TRUE;
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return FALSE;
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}
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static gboolean
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glob_fnmatch (const gchar *pattern,
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const gchar *string)
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{
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return fnmatch_intern (pattern, string, TRUE, TRUE);
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}
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