added vips_object_set_from_string()

ChangeLog

@@ -24,6 +24,7 @@
 - add ".vips" as an alternative suffix for vips files
 - added vips_tiffload_buffer()
 - added vips_foreign_load_buffer(), vips_foreign_save_buffer()
+- added vips_object_set_from_string()
 
 6/3/14 started 7.38.6
 - grey ramp minimum was wrong

TODO

@@ -6,22 +6,19 @@
 
   - set options from suffix
 
-  no. 2 needs something like:
+  use vips__find_rightmost_brackets() and vips_object_set_from_string()
 
-  vips_object_set_options_from_string( object, "[a=12,b=13]" );
+- use vips_object_set_from_string() for vips_foreign_load_options() and
+  friends
 
-  perhaps with the outermost brackets optional?
-
-  maybe vips_object_set_from_string()?
-
-  read object.c and see how close we are to this model now
-
-- clean up foreign.c, there seems to be some cruft
 
 
 - use this for dzsave_buffer 
 
 
+
+- clean up foreign.c, there seems to be some cruft
+
 - vips_filename_suffix_match() is used by
   vips_foreign_load_new_from_foreign_sub(), but it splits on ':' ... argh!
 

libvips/include/vips/object.h

@@ -587,6 +587,7 @@ VipsObject *vips_object_new( GType type,
 int vips_object_set_valist( VipsObject *object, va_list ap );
 int vips_object_set( VipsObject *object, ... )
 	__attribute__((sentinel));
+int vips_object_set_from_string( VipsObject *object, const char *string );
 
 VipsObject *vips_object_new_from_string( VipsObjectClass *object_class, 
 	const char *p );

libvips/iofuncs/object.c

@@ -2054,7 +2054,7 @@ vips_object_set_valist( VipsObject *object, va_list ap )
  * Input arguments are given in-line, output arguments are given as pointers
  * to where the output value should be written.
  *
- * See also: vips_object_set_valist().
+ * See also: vips_object_set_valist(), vips_object_set_from_string(). 
  *
  * Returns: 0 on success, -1 on error
  */
@@ -2072,7 +2072,7 @@ vips_object_set( VipsObject *object, ... )
 }
 
 /* Set object args from a string. @p should be the initial left bracket and
- * there should be no tokens after the matching right bracket.
+ * there should be no tokens after the matching right bracket. @p is modified. 
  */
 static int
 vips_object_set_args( VipsObject *object, const char *p )
@@ -2154,6 +2154,44 @@ vips_object_set_args( VipsObject *object, const char *p )
 	return( 0 );
 }
 
+/**
+ * vips_object_set_from_string:
+ * @object: object to set arguments on
+ * @string: arguments as a string
+ *
+ * Set object arguments from a string. The string can be something like
+ * "a=12", or "a = 12, b = 13", or "fred". The string can optionally be
+ * enclosed in brackets. 
+ *
+ * You'd typically use this between creating the object and building it. 
+ *
+ * See also: vips_object_set(), vips_object_build(),
+ * vips_cache_operation_buildp(). 
+ *
+ * Returns: 0 on success, -1 on error
+ */
+int
+vips_object_set_from_string( VipsObject *object, const char *string )
+{
+	const char *q;
+	VipsToken token;
+	char buffer[VIPS_PATH_MAX];
+	char str[VIPS_PATH_MAX];
+
+	vips_strncpy( buffer, string, VIPS_PATH_MAX );
+
+	/* Does string start with a bracket? If it doesn't, enclose the whole
+	 * thing in [].
+	 */
+	if( !(q = vips__token_get( buffer, &token, str, VIPS_PATH_MAX )) !!
+		token != VIPS_TOKEN_LEFT )
+		vips_snprintf( buffer, VIPS_PATH_MAX, "[%s]", string );
+	else
+		vips_strncpy( buffer, string, VIPS_PATH_MAX );
+
+	return( vips_object_set_args( object, buffer ) ); 
+}
+
 VipsObject *
 vips_object_new_from_string( VipsObjectClass *object_class, const char *p )
 {
@@ -2177,7 +2215,7 @@ vips_object_new_from_string( VipsObjectClass *object_class, const char *p )
 	/* More tokens there? Set any other args.
 	 */
 	if( q && 
-		vips_object_set_args( object, q ) ) {
+		vips_object_set_from_string( object, q ) ) {
 		g_object_unref( object );
 		return( NULL );
 	}