inotify-watch: Adding inotify watch datastructure.

src/inotify-watch.c

@@ -0,0 +1,75 @@
+
+#include <stdio.h>
+#include <string.h>
+#include "xalloc.h"
+#include "path.h"
+#include "inotify-watch.h"
+
+struct watch* inotify_watch_new(int wd, const char *path) {
+
+    struct watch *w = xmallocz(sizeof(struct watch));
+
+    w->wd = wd;
+    w->path = path;
+    
+    return w;
+}
+
+static void watch_free(struct tree *tree, void *data) {
+
+    void (*fn)(struct watch *) = data;
+
+    if (fn)
+        fn((struct watch*)tree);
+    xfree(tree);
+}
+
+void inotify_watch_destroy(struct watch *watch, void (*fn)(struct watch *)) {
+
+    if (watch) {
+        struct tree *tree = (struct tree*) watch;
+        
+        if (!tree_is_root(tree))
+            tree_detach(tree);
+
+        tree_traverse(tree, watch_free, fn);
+    }
+}
+
+struct watch* inotify_watch_add(struct watch *parent, struct watch *watch) {
+
+    if (parent->tree.child) {
+        struct watch *it = (struct watch*)parent->tree.child;
+        
+        /* move nodes that are children of this watch alongside watch */
+        while(it) {
+            if (path_isparent(it->path, watch->path)) {
+                struct watch *next = (struct watch*)it->tree.next;
+                tree_move(&watch->tree, &it->tree);
+                it = next;
+            } else {
+                it = (struct watch*)it->tree.next;
+            }
+        }
+    }
+    return (struct watch*)tree_link(&parent->tree, &watch->tree);
+}
+
+void inotify_watch_rm(struct watch *watch) {
+
+    tree_unlink(&watch->tree);
+}
+
+struct watch* inoitfy_watch_find_child(struct watch *watch, const char *path) {
+
+    if (watch->tree.child) {
+        struct watch *it = (struct watch *) watch->tree.child;
+
+        while(it) {
+            if (!strcmp(watch->path, it->path))
+                return it;
+            it = (struct watch*) it->tree.next;
+        }
+    }
+    return NULL;
+}

src/inotify-watch.h

@@ -0,0 +1,21 @@
+
+#ifndef INOTIFY_WATCH_H
+#define INOTIFY_WATCH_H
+
+#include "tree.h"
+
+struct watch {
+    struct tree tree;
+    int wd;
+    const char *path;
+};
+
+struct watch* inotify_watch_new(int wd, const char *path);
+
+void inotify_watch_destroy(struct watch *watch, void (*fn)(struct watch *));
+
+struct watch* inotify_watch_add(struct watch *parent, struct watch *watch);
+
+void inotify_watch_rm(struct watch *watch);
+
+#endif