ExcludeList: convert to a class

src/ExcludeList.cxx

@@ -34,8 +34,8 @@ extern "C" {
 #include <stdio.h>
 #include <errno.h>
 
-GSList *
-exclude_list_load(const char *path_fs)
+bool
+ExcludeList::LoadFile(const char *path_fs)
 {
 	assert(path_fs != NULL);
 
@@ -48,10 +48,9 @@ exclude_list_load(const char *path_fs)
 			g_free(path_utf8);
 		}
 
-		return NULL;
+		return false;
 	}
 
-	GSList *list = NULL;
 	char line[1024];
 	while (fgets(line, sizeof(line), file) != NULL) {
 		char *p = strchr(line, '#');
@@ -60,37 +59,24 @@ exclude_list_load(const char *path_fs)
 
 		p = g_strstrip(line);
 		if (*p != 0)
-			list = g_slist_prepend(list, g_pattern_spec_new(p));
+			patterns.emplace_front(p);
 	}
 
 	fclose(file);
 
-	return list;
-}
-
-void
-exclude_list_free(GSList *list)
-{
-	while (list != NULL) {
-		GPatternSpec *pattern = (GPatternSpec *)list->data;
-		g_pattern_spec_free(pattern);
-		list = g_slist_remove(list, list->data);
-	}
+	return true;
 }
 
 bool
-exclude_list_check(GSList *list, const char *name_fs)
+ExcludeList::Check(const char *name_fs) const
 {
 	assert(name_fs != NULL);
 
 	/* XXX include full path name in check */
 
-	for (; list != NULL; list = list->next) {
-		GPatternSpec *pattern = (GPatternSpec *)list->data;
-
-		if (g_pattern_match_string(pattern, name_fs))
+	for (const auto &i : patterns)
+		if (i.Check(name_fs))
 			return true;
-	}
 
 	return false;
 }

src/ExcludeList.hxx

@@ -25,25 +25,54 @@
 #ifndef MPD_EXCLUDE_H
 #define MPD_EXCLUDE_H
 
+#include "gcc.h"
+
+#include <forward_list>
+
 #include <glib.h>
 
-/**
- * Loads and parses a .mpdignore file.
- */
-GSList *
-exclude_list_load(const char *path_fs);
+class ExcludeList {
+	class Pattern {
+		GPatternSpec *pattern;
 
-/**
- * Frees a list returned by exclude_list_load().
- */
-void
-exclude_list_free(GSList *list);
+	public:
+		Pattern(const char *_pattern)
+			:pattern(g_pattern_spec_new(_pattern)) {}
+
+		Pattern(Pattern &&other)
+			:pattern(other.pattern) {
+			other.pattern = nullptr;
+		}
+
+		~Pattern() {
+			g_pattern_spec_free(pattern);
+		}
+
+		gcc_pure
+		bool Check(const char *name_fs) const {
+			return g_pattern_match_string(pattern, name_fs);
+		}
+	};
+
+	std::forward_list<Pattern> patterns;
+
+public:
+	gcc_pure
+	bool IsEmpty() const {
+		return patterns.empty();
+	}
+
+	/**
+	 * Loads and parses a .mpdignore file.
+	 */
+	bool LoadFile(const char *path_fs);
+
+	/**
+	 * Checks whether one of the patterns in the .mpdignore file matches
+	 * the specified file name.
+	 */
+	bool Check(const char *name_fs) const;
+};
 
-/**
- * Checks whether one of the patterns in the .mpdignore file matches
- * the specified file name.
- */
-bool
-exclude_list_check(GSList *list, const char *name_fs);
 
 #endif

src/UpdateWalk.cxx

@@ -95,7 +95,8 @@ directory_set_stat(Directory *dir, const struct stat *st)
 }
 
 static void
-remove_excluded_from_directory(Directory *directory, GSList *exclude_list)
+remove_excluded_from_directory(Directory *directory,
+			       const ExcludeList &exclude_list)
 {
 	db_lock();
 
@@ -103,7 +104,7 @@ remove_excluded_from_directory(Directory *directory, GSList *exclude_list)
 	directory_for_each_child_safe(child, n, directory) {
 		char *name_fs = utf8_to_fs_charset(child->GetName());
 
-		if (exclude_list_check(exclude_list, name_fs)) {
+		if (exclude_list.Check(name_fs)) {
 			delete_directory(child);
 			modified = true;
 		}
@@ -116,7 +117,7 @@ remove_excluded_from_directory(Directory *directory, GSList *exclude_list)
 		assert(song->parent == directory);
 
 		char *name_fs = utf8_to_fs_charset(song->uri);
-		if (exclude_list_check(exclude_list, name_fs)) {
+		if (exclude_list.Check(name_fs)) {
 			delete_song(directory, song);
 			modified = true;
 		}
@@ -371,12 +372,13 @@ update_directory(Directory *directory, const struct stat *st)
 	}
 
 	char *exclude_path_fs  = g_build_filename(path_fs, ".mpdignore", NULL);
-	GSList *exclude_list = exclude_list_load(exclude_path_fs);
+	ExcludeList exclude_list;
+	exclude_list.LoadFile(exclude_path_fs);
 	g_free(exclude_path_fs);
 
 	g_free(path_fs);
 
-	if (exclude_list != NULL)
+	if (!exclude_list.IsEmpty())
 		remove_excluded_from_directory(directory, exclude_list);
 
 	purge_deleted_from_directory(directory);
@@ -386,8 +388,7 @@ update_directory(Directory *directory, const struct stat *st)
 		char *utf8;
 		struct stat st2;
 
-		if (skip_path(ent->d_name) ||
-		    exclude_list_check(exclude_list, ent->d_name))
+		if (skip_path(ent->d_name) || exclude_list.Check(ent->d_name))
 			continue;
 
 		utf8 = fs_charset_to_utf8(ent->d_name);
@@ -408,8 +409,6 @@ update_directory(Directory *directory, const struct stat *st)
 		g_free(utf8);
 	}
 
-	exclude_list_free(exclude_list);
-
 	closedir(dir);
 
 	directory->mtime = st->st_mtime;