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- /* The GIMP -- an image manipulation program
- * Copyright (C) 1995 Spencer Kimball and Peter Mattis
- *
- * 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.
- */
-
- #include "config.h"
-
- #include <stdarg.h>
- #include <string.h>
-
- #include <glib.h>
-
- #include "apptypes.h"
-
- #include "appenv.h"
- #include "app_procs.h"
- #include "plug_in.h"
- #include "procedural_db.h"
-
- #include "libgimp/gimpparasite.h"
-
- #include "libgimp/gimpintl.h"
-
-
- GHashTable *procedural_ht = NULL;
-
- /* Local functions */
- static guint procedural_db_hash_func (gconstpointer key);
- static void pdb_id_init (void);
-
-
- void
- procedural_db_init (void)
- {
- app_init_update_status (_("Procedural Database"), NULL, -1);
-
- if (!procedural_ht)
- procedural_ht = g_hash_table_new (procedural_db_hash_func, g_str_equal);
- pdb_id_init ();
- }
-
- static void
- procedural_db_free_entry (gpointer key,
- gpointer value,
- gpointer user_data)
- {
- if (value)
- g_list_free (value);
- }
-
- void
- procedural_db_free (void)
- {
- if (procedural_ht)
- {
- g_hash_table_foreach (procedural_ht, procedural_db_free_entry, NULL);
- g_hash_table_destroy (procedural_ht);
- }
-
- procedural_ht = NULL;
- }
-
- void
- procedural_db_register (ProcRecord *procedure)
- {
- GList *list;
-
- if (!procedural_ht)
- procedural_db_init ();
-
- list = g_hash_table_lookup (procedural_ht, (gpointer) procedure->name);
- list = g_list_prepend (list, (gpointer) procedure);
-
- g_hash_table_insert (procedural_ht,
- (gpointer) procedure->name,
- (gpointer) list);
- }
-
- void
- procedural_db_unregister (gchar *name)
- {
- GList *list;
-
- list = g_hash_table_lookup (procedural_ht, (gpointer) name);
- if (list)
- {
- list = g_list_remove (list, list->data);
-
- if (list)
- g_hash_table_insert (procedural_ht,
- (gpointer) name,
- (gpointer) list);
- else
- g_hash_table_remove (procedural_ht,
- (gpointer) name);
- }
- }
-
- ProcRecord *
- procedural_db_lookup (gchar *name)
- {
- GList *list;
- ProcRecord *procedure;
-
- list = g_hash_table_lookup (procedural_ht, (gpointer) name);
- if (list != NULL)
- procedure = (ProcRecord *) list->data;
- else
- procedure = NULL;
-
- return procedure;
- }
-
- Argument *
- procedural_db_execute (gchar *name,
- Argument *args)
- {
- ProcRecord *procedure;
- Argument *return_args;
- GList *list;
- gint i;
-
- return_args = NULL;
-
- list = g_hash_table_lookup (procedural_ht, (gpointer) name);
-
- if (list == NULL)
- {
- g_message (_("PDB calling error %s not found"), name);
-
- return_args = g_new (Argument, 1);
- return_args->arg_type = PDB_STATUS;
- return_args->value.pdb_int = PDB_CALLING_ERROR;
- return return_args;
- }
-
- while (list)
- {
- if ((procedure = (ProcRecord *) list->data) == NULL)
- {
- g_message (_("PDB calling error %s not found"), name);
-
- return_args = g_new (Argument, 1);
- return_args->arg_type = PDB_STATUS;
- return_args->value.pdb_int = PDB_CALLING_ERROR;
- return return_args;
- }
- list = list->next;
-
- /* check the arguments */
- for (i = 0; i < procedure->num_args; i++)
- {
- if (args[i].arg_type != procedure->args[i].arg_type)
- {
- return_args = g_new (Argument, 1);
- return_args->arg_type = PDB_STATUS;
- return_args->value.pdb_int = PDB_CALLING_ERROR;
-
- g_message (_("PDB calling error %s"), procedure->name);
-
- return return_args;
- }
- }
-
- /* call the procedure */
- switch (procedure->proc_type)
- {
- case PDB_INTERNAL:
- return_args = (* procedure->exec_method.internal.marshal_func) (args);
- break;
-
- case PDB_PLUGIN:
- return_args = plug_in_run (procedure, args, procedure->num_args, TRUE, FALSE, -1);
- break;
-
- case PDB_EXTENSION:
- return_args = plug_in_run (procedure, args, procedure->num_args, TRUE, FALSE, -1);
- break;
-
- case PDB_TEMPORARY:
- return_args = plug_in_run (procedure, args, procedure->num_args, TRUE, FALSE, -1);
- break;
-
- default:
- return_args = g_new (Argument, 1);
- return_args->arg_type = PDB_STATUS;
- return_args->value.pdb_int = PDB_EXECUTION_ERROR;
- break;
- }
-
- if ((return_args[0].value.pdb_int != PDB_SUCCESS) &&
- (procedure->num_values > 0))
- memset (&return_args[1], 0, sizeof (Argument) * procedure->num_values);
-
- /* Check if the return value is a PDB_PASS_THROUGH, in which case run the
- * next procedure in the list
- */
- if (return_args[0].value.pdb_int != PDB_PASS_THROUGH)
- break;
- else if (list) /* Pass through, so destroy return values and run another procedure */
- procedural_db_destroy_args (return_args, procedure->num_values);
- }
-
- return return_args;
- }
-
- Argument *
- procedural_db_run_proc (gchar *name,
- gint *nreturn_vals,
- ...)
- {
- ProcRecord *proc;
- Argument *params;
- Argument *return_vals;
- va_list args;
- gint i;
-
- if ((proc = procedural_db_lookup (name)) == NULL)
- {
- return_vals = g_new (Argument, 1);
- return_vals->arg_type = PDB_STATUS;
- return_vals->value.pdb_int = PDB_CALLING_ERROR;
- return return_vals;
- }
-
- /* allocate the parameter array */
- params = g_new (Argument, proc->num_args);
-
- va_start (args, nreturn_vals);
-
- for (i = 0; i < proc->num_args; i++)
- {
- if (proc->args[i].arg_type != (params[i].arg_type = va_arg (args, PDBArgType)))
- {
- g_message (_("Incorrect arguments passed to procedural_db_run_proc:\n"
- "Argument %d to '%s' should be a %s, but got passed a %s"),
- i+1, proc->name,
- pdb_type_name (proc->args[i].arg_type),
- pdb_type_name (params[i].arg_type));
- g_free (params);
- return NULL;
- }
-
- switch (proc->args[i].arg_type)
- {
- case PDB_INT32:
- case PDB_INT16:
- case PDB_INT8:
- case PDB_DISPLAY:
- params[i].value.pdb_int = (gint32) va_arg (args, int);
- break;
- case PDB_FLOAT:
- params[i].value.pdb_float = (gdouble) va_arg (args, double);
- break;
- case PDB_STRING:
- case PDB_INT32ARRAY:
- case PDB_INT16ARRAY:
- case PDB_INT8ARRAY:
- case PDB_FLOATARRAY:
- case PDB_STRINGARRAY:
- case PDB_COLOR:
- params[i].value.pdb_pointer = va_arg (args, void *);
- break;
- case PDB_REGION:
- break;
- case PDB_IMAGE:
- case PDB_LAYER:
- case PDB_CHANNEL:
- case PDB_DRAWABLE:
- case PDB_SELECTION:
- case PDB_BOUNDARY:
- case PDB_PATH:
- params[i].value.pdb_int = (gint32) va_arg (args, int);
- break;
- case PDB_PARASITE:
- params[i].value.pdb_pointer = va_arg (args, void *);
- break;
- case PDB_STATUS:
- params[i].value.pdb_int = (gint32) va_arg (args, int);
- break;
- case PDB_END:
- break;
- }
- }
-
- va_end (args);
-
- *nreturn_vals = proc->num_values;
-
- return_vals = procedural_db_execute (name, params);
-
- g_free (params);
-
- return return_vals;
- }
-
- Argument *
- procedural_db_return_args (ProcRecord *procedure,
- gboolean success)
- {
- Argument *return_args;
- gint i;
-
- return_args = g_new (Argument, procedure->num_values + 1);
-
- if (success)
- {
- return_args[0].arg_type = PDB_STATUS;
- return_args[0].value.pdb_int = PDB_SUCCESS;
- }
- else
- {
- return_args[0].arg_type = PDB_STATUS;
- return_args[0].value.pdb_int = PDB_EXECUTION_ERROR;
- }
-
- /* Set the arg types for the return values */
- for (i = 0; i < procedure->num_values; i++)
- return_args[i+1].arg_type = procedure->values[i].arg_type;
-
- return return_args;
- }
-
- void
- procedural_db_destroy_args (Argument *args,
- int nargs)
- {
- gint i, j;
- gint prev_val = 0;
- gchar **strs;
-
- if (!args)
- return;
-
- for (i = 0; i < nargs; i++)
- {
- switch (args[i].arg_type)
- {
- case PDB_INT32:
- /* Keep this around in case we need to free an array of strings */
- prev_val = args[i].value.pdb_int;
- break;
- case PDB_INT16:
- case PDB_INT8:
- case PDB_FLOAT:
- break;
- case PDB_STRING:
- case PDB_INT32ARRAY:
- case PDB_INT16ARRAY:
- case PDB_INT8ARRAY:
- case PDB_FLOATARRAY:
- g_free (args[i].value.pdb_pointer);
- break;
- case PDB_STRINGARRAY:
- strs = (gchar **) args[i].value.pdb_pointer;
- for (j = 0; j < prev_val; j++)
- g_free (strs[j]);
- g_free (strs);
- break;
- case PDB_COLOR:
- g_free (args[i].value.pdb_pointer);
- break;
- case PDB_REGION:
- case PDB_DISPLAY:
- case PDB_IMAGE:
- case PDB_LAYER:
- case PDB_CHANNEL:
- case PDB_DRAWABLE:
- case PDB_SELECTION:
- case PDB_BOUNDARY:
- case PDB_PATH:
- case PDB_PARASITE:
- case PDB_STATUS:
- case PDB_END:
- break;
- }
- }
-
- g_free (args);
- }
-
- /* We could just use g_str_hash() here ... that uses a different
- * hash function, though
- */
-
- static guint
- procedural_db_hash_func (gconstpointer key)
- {
- const gchar *string;
- guint result;
- int c;
-
- /*
- * I tried a zillion different hash functions and asked many other
- * people for advice. Many people had their own favorite functions,
- * all different, but no-one had much idea why they were good ones.
- * I chose the one below (multiply by 9 and add new character)
- * because of the following reasons:
- *
- * 1. Multiplying by 10 is perfect for keys that are decimal strings,
- * and multiplying by 9 is just about as good.
- * 2. Times-9 is (shift-left-3) plus (old). This means that each
- * character's bits hang around in the low-order bits of the
- * hash value for ever, plus they spread fairly rapidly up to
- * the high-order bits to fill out the hash value. This seems
- * works well both for decimal and non-decimal strings.
- *
- * tclHash.c --
- *
- * Implementation of in-memory hash tables for Tcl and Tcl-based
- * applications.
- *
- * Copyright (c) 1991-1993 The Regents of the University of California.
- * Copyright (c) 1994 Sun Microsystems, Inc.
- */
-
- string = (const gchar *) key;
- result = 0;
- while (1)
- {
- c = *string;
- string++;
- if (c == 0)
- break;
- result += (result << 3) + c;
- }
-
- return result;
- }
-
-
- /* The id system's remnants ... */
-
-
- static gint next_image_id;
- /*
- static gint next_drawable_id;
- static gint next_display_id;
- */
-
- static GHashTable *image_hash;
- static GHashTable *drawable_hash;
- static GHashTable *display_hash;
-
- static guint
- id_hash_func (gconstpointer id)
- {
- return *((guint*) id);
- }
-
- static gboolean
- id_cmp_func (gconstpointer id1,
- gconstpointer id2)
- {
- return (*((guint*) id1) == *((guint*) id2));
- }
-
- static void
- add_cb (GimpSet *set,
- GimpImage *gimage,
- gpointer data)
- {
- guint *id;
-
- id = g_new (guint, 1);
- *id = next_image_id++;
-
- gtk_object_set_data (GTK_OBJECT (gimage), "pdb_id", id);
- g_hash_table_insert (image_hash, id, gimage);
- }
-
- static void
- remove_cb (GimpSet *set,
- GimpImage *image,
- gpointer data)
- {
- guint *id;
-
- id = (guint *) gtk_object_get_data (GTK_OBJECT (image), "pdb_id");
-
- gtk_object_remove_data (GTK_OBJECT(image), "pdb_id");
- g_hash_table_remove (image_hash, id);
- g_free (id);
- }
-
- static void
- pdb_id_init (void)
- {
- image_hash = g_hash_table_new (id_hash_func, id_cmp_func);
- drawable_hash = g_hash_table_new (id_hash_func, id_cmp_func);
- display_hash = g_hash_table_new (id_hash_func, id_cmp_func);
-
- gtk_signal_connect (GTK_OBJECT (image_context), "add",
- GTK_SIGNAL_FUNC (add_cb),
- NULL);
- gtk_signal_connect (GTK_OBJECT (image_context), "remove",
- GTK_SIGNAL_FUNC (remove_cb),
- NULL);
- }
-
-
- gint
- pdb_image_to_id (GimpImage *gimage)
- {
- guint *id;
-
- id = (guint *) gtk_object_get_data (GTK_OBJECT (gimage), "pdb_id");
-
- return id ? (gint) *id : -1;
- }
-
- GimpImage *
- pdb_id_to_image (gint id)
- {
- return g_hash_table_lookup (image_hash, &id);
- }
-