add procedural_db_get_data_size and gimp_get_data_Size functions from Nick Lamb

-Yosh

ChangeLog

@@ -1,3 +1,9 @@
+Fri Jun 26 17:22:00 PDT 1998 Manish Singh <yosh@gimp.org>
+
+	* libgimp/gimp.[ch]
+	* app/procedural_db.c: add procedural_db_get_data_size and
+	gimp_get_data_Size functions from Nick Lamb
+
 Fri Jun 26 11:00:35 PDT 1998 Manish Singh <yosh@gimp.org>
 
 	* plug-ins/script-fu/scripts.c: define DIVIDE here too (auf,

app/procedural_db.c

@@ -20,13 +20,14 @@
 #include <stdarg.h>
 #include <string.h>
 #include <sys/types.h>
-#include "regex.h"
 #include "appenv.h"
 #include "app_procs.h"
 #include "general.h"
 #include "gdisplay.h"
 #include "plug_in.h"
 #include "procedural_db.h"
+#include "config.h"
+#include "regex.h"
 
 /*  Query structure  */
 typedef struct _PDBQuery PDBQuery;
@@ -62,6 +63,7 @@ static Argument * procedural_db_proc_info (Argument *);
 static Argument * procedural_db_proc_arg (Argument *);
 static Argument * procedural_db_proc_val (Argument *);
 static Argument * procedural_db_get_data (Argument *);
+static Argument * procedural_db_get_data_size (Argument *);
 static Argument * procedural_db_set_data (Argument *);
 static Argument * procedural_db_query (Argument *);
 static void       procedural_db_query_entry (gpointer, gpointer, gpointer);
@@ -320,6 +322,47 @@ ProcRecord procedural_db_proc_val_proc =
 };
 
 
+/*********************************/
+/*  PROCEDURAL_DB_GET_DATA_SIZE  */
+
+static ProcArg procedural_db_get_data_size_args[] =
+{
+  { PDB_STRING,
+    "identifier",
+    "the identifier associated with data"
+  },
+};
+
+static ProcArg procedural_db_get_data_size_out_args[] =
+{
+  { PDB_INT32,
+    "bytes",
+    "the number of bytes in the data"
+  }
+};
+
+ProcRecord procedural_db_get_data_size_proc =
+{
+  "gimp_procedural_db_get_data_size",
+  "Returns size of data associated with the specified identifier",
+  "This procedure returns the size of any data which may have been associated with the specified identifier. If no data has been associated with the identifier, an error is returned.",
+  "Nick Lamb",
+  "Nick Lamb",
+  "1998",
+  PDB_INTERNAL,
+
+  /*  Input arguments  */
+  1,
+  procedural_db_get_data_size_args,
+
+  /*  Output arguments  */
+  2,
+  procedural_db_get_data_size_out_args,
+
+  /*  Exec method  */
+  { { procedural_db_get_data_size } },
+};
+
 /****************************/
 /*  PROCEDURAL_DB_GET_DATA  */
 
@@ -1012,6 +1055,33 @@ procedural_db_get_data (Argument *args)
   return return_args;
 }
 
+static Argument *
+procedural_db_get_data_size (Argument *args)
+{
+  Argument *return_args;
+  PDBData *data;
+  char *identifier;
+  GList *list;
+
+  identifier = args[0].value.pdb_pointer;
+  list = data_list;
+  while (list)
+    {
+      data = (PDBData *) list->data;
+      list = list->next;
+
+      if (strcmp (data->identifier, identifier) == 0)
+	{
+	  return_args = procedural_db_return_args (&procedural_db_get_data_size_proc, TRUE);
+	  return_args[1].value.pdb_int = data->bytes;
+	  return return_args;
+	}
+    }
+
+  return_args = procedural_db_return_args (&procedural_db_proc_val_proc, FALSE);
+  return return_args;
+}
+
 static Argument *
 procedural_db_set_data (Argument *args)
 {

libgimp/gimp.c

@@ -150,6 +150,28 @@ gimp_set_data (gchar *  id,
   gimp_destroy_params (return_vals, nreturn_vals);
 }
 
+guint32
+gimp_get_data_size (gchar *  id)
+{
+  GParam *return_vals;
+  int nreturn_vals;
+  guint32 length;
+
+  return_vals = gimp_run_procedure ("gimp_procedural_db_get_data_size",
+                                    &nreturn_vals,
+                                    PARAM_STRING, id,
+                                    PARAM_END);
+
+  if (return_vals[0].data.d_status == STATUS_SUCCESS)
+      length= return_vals[1].data.d_int32;
+  else
+      length= 0;
+
+  gimp_destroy_params (return_vals, nreturn_vals);
+  return length;
+}
+
+
 void
 gimp_get_data (gchar *  id,
 	       gpointer data)

libgimp/gimp.h

@@ -191,6 +191,11 @@ void gimp_set_data (gchar *  id,
 void gimp_get_data (gchar *  id,
 		    gpointer data);
 
+/* Get the size in bytes of the data stored by a gimp_get_data
+ * id. As size of zero may indicate that there is no such
+ * identifier in the database.
+ */
+guint32 gimp_get_data_size (gchar * id);
 
 /* Initialize the progress bar with "message". If "message"
  *  is NULL, the message displayed in the progress window will