Tag*: move libtag.a sources to src/tag/

src/tag/ApeTag.cxx

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "ApeTag.hxx"
+#include "ApeLoader.hxx"
+#include "Tag.hxx"
+#include "TagTable.hxx"
+#include "TagHandler.hxx"
+
+const struct tag_table ape_tags[] = {
+	{ "album artist", TAG_ALBUM_ARTIST },
+	{ "year", TAG_DATE },
+	{ nullptr, TAG_NUM_OF_ITEM_TYPES }
+};
+
+static enum tag_type
+tag_ape_name_parse(const char *name)
+{
+	enum tag_type type = tag_table_lookup_i(ape_tags, name);
+	if (type == TAG_NUM_OF_ITEM_TYPES)
+		type = tag_name_parse_i(name);
+
+	return type;
+}
+
+/**
+ * @return true if the item was recognized
+ */
+static bool
+tag_ape_import_item(unsigned long flags,
+		    const char *key, const char *value, size_t value_length,
+		    const struct tag_handler *handler, void *handler_ctx)
+{
+	/* we only care about utf-8 text tags */
+	if ((flags & (0x3 << 1)) != 0)
+		return false;
+
+	tag_handler_invoke_pair(handler, handler_ctx, key, value);
+
+	enum tag_type type = tag_ape_name_parse(key);
+	if (type == TAG_NUM_OF_ITEM_TYPES)
+		return false;
+
+	bool recognized = false;
+	const char *end = value + value_length;
+	while (true) {
+		/* multiple values are separated by null bytes */
+		const char *n = (const char *)memchr(value, 0, end - value);
+		if (n != nullptr) {
+			if (n > value) {
+				tag_handler_invoke_tag(handler, handler_ctx,
+						       type, value);
+				recognized = true;
+			}
+
+			value = n + 1;
+		} else {
+			char *p = g_strndup(value, end - value);
+			tag_handler_invoke_tag(handler, handler_ctx,
+					       type, p);
+			g_free(p);
+			recognized = true;
+			break;
+		}
+	}
+
+	return recognized;
+}
+
+bool
+tag_ape_scan2(const char *path_fs,
+	      const struct tag_handler *handler, void *handler_ctx)
+{
+	bool recognized = false;
+
+	auto callback = [handler, handler_ctx, &recognized]
+		(unsigned long flags, const char *key,
+		 const char *value,
+		 size_t value_length) {
+		recognized |= tag_ape_import_item(flags, key, value,
+						  value_length,
+						  handler, handler_ctx);
+		return true;
+	};
+
+	return tag_ape_scan(path_fs, callback) && recognized;
+}