Add support for adding a node with a given name.

libisofs/libisofs.h

@@ -2731,6 +2731,35 @@ void iso_tree_set_report_callback(IsoImage *image,
 int iso_tree_add_node(IsoImage *image, IsoDir *parent, const char *path,
                       IsoNode **node);
 
+/**
+ * Add a new node to the image tree, from an existing file, and with the
+ * given name, that must not exist on dir.
+ * 
+ * @param image
+ *      The image
+ * @param parent
+ *      The directory in the image tree where the node will be added.
+ * @param name
+ *      The name that the node will have on image.
+ * @param path
+ *      The path of the file to add in the filesystem.
+ * @param node
+ *      place where to store a pointer to the newly added file. No 
+ *      extra ref is addded, so you will need to call iso_node_ref() if you 
+ *      really need it. You can pass NULL in this parameter if you don't need 
+ *      the pointer.
+ * @return
+ *     number of nodes in parent if success, < 0 otherwise
+ *     Possible errors:
+ *         ISO_NULL_POINTER, if image, parent or path are NULL
+ *         ISO_NODE_NAME_NOT_UNIQUE, a node with same name already exists
+ *         ISO_OUT_OF_MEM
+ * 
+ * @since 0.6.4
+ */
+int iso_tree_add_new_node(IsoImage *image, IsoDir *parent, const char *name, 
+                          const char *path, IsoNode **node);
+
 /**
  * Add the contents of a dir to a given directory of the iso tree.
  * 

libisofs/tree.c

@@ -475,6 +475,59 @@ int iso_tree_add_node(IsoImage *image, IsoDir *parent, const char *path,
     return result;
 }
 
+int iso_tree_add_new_node(IsoImage *image, IsoDir *parent, const char *name, 
+                          const char *path, IsoNode **node)
+{
+    int result;
+    IsoFilesystem *fs;
+    IsoFileSource *file;
+    IsoNode *new;
+    IsoNode **pos;
+
+    if (image == NULL || parent == NULL || name == NULL || path == NULL) {
+        return ISO_NULL_POINTER;
+    }
+
+    if (node) {
+        *node = NULL;
+    }
+
+    fs = image->fs;
+    result = fs->get_by_path(fs, path, &file);
+    if (result < 0) {
+        return result;
+    }
+
+    /* find place where to insert */
+    result = iso_dir_exists(parent, name, &pos);
+    if (result) {
+        /* a node with same name already exists */
+        iso_file_source_unref(file);
+        return ISO_NODE_NAME_NOT_UNIQUE;
+    }
+
+    result = image->builder->create_node(image->builder, image, file, &new);
+    if (result < 0) {
+        return result;
+    }
+    
+    /* free the file */
+    iso_file_source_unref(file);
+    
+    result = iso_node_set_name(new, name);
+    if (result < 0) {
+        iso_node_unref(new);
+        return result;
+    }
+
+    if (node) {
+        *node = new;
+    }
+
+    /* finally, add node to parent */
+    return iso_dir_insert(parent, new, pos, ISO_REPLACE_NEVER);
+}
+
 static
 int check_excludes(IsoImage *image, const char *path)
 {