From a1561252d0621fbd74dd6eb9be0de28a5b512c1f Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Mon, 2 Mar 2009 15:42:42 +0100
Subject: directory: directory_load() returns GError

Do error reporting with GLib's GError library in this library, too.
---
 src/database.c       |  6 +++++-
 src/directory_save.c | 59 ++++++++++++++++++++++++++++++++++++++--------------
 src/directory_save.h |  7 +++++--
 3 files changed, 53 insertions(+), 19 deletions(-)

diff --git a/src/database.c b/src/database.c
index 814811454..e25461c33 100644
--- a/src/database.c
+++ b/src/database.c
@@ -282,6 +282,7 @@ db_load(GError **error)
 	struct stat st;
 	char buffer[100];
 	bool found_charset = false, found_version = false;
+	bool success;
 
 	assert(database_path != NULL);
 	assert(music_root != NULL);
@@ -357,9 +358,12 @@ db_load(GError **error)
 
 	g_debug("reading DB");
 
-	directory_load(fp, music_root);
+	success = directory_load(fp, music_root, error);
 	while (fclose(fp) && errno == EINTR) ;
 
+	if (!success)
+		return false;
+
 	stats_update();
 
 	if (stat(database_path, &st) == 0)
diff --git a/src/directory_save.c b/src/directory_save.c
index b009b1ef5..99ec6216c 100644
--- a/src/directory_save.c
+++ b/src/directory_save.c
@@ -19,12 +19,9 @@
 #include "directory_save.h"
 #include "directory.h"
 #include "song.h"
-#include "log.h"
 #include "path.h"
 #include "song_save.h"
 
-#include <glib.h>
-
 #include <assert.h>
 #include <string.h>
 
@@ -32,6 +29,15 @@
 #define DIRECTORY_BEGIN "begin: "
 #define DIRECTORY_END "end: "
 
+/**
+ * The quark used for GError.domain.
+ */
+static inline GQuark
+directory_quark(void)
+{
+	return g_quark_from_static_string("directory");
+}
+
 /* TODO error checking */
 int
 directory_save(FILE *fp, struct directory *directory)
@@ -71,12 +77,13 @@ directory_save(FILE *fp, struct directory *directory)
 	return 0;
 }
 
-void
-directory_load(FILE *fp, struct directory *directory)
+bool
+directory_load(FILE *fp, struct directory *directory, GError **error)
 {
 	char buffer[MPD_PATH_MAX * 2];
 	char key[MPD_PATH_MAX * 2];
 	char *name;
+	bool success;
 
 	while (fgets(buffer, sizeof(buffer), fp)
 	       && !g_str_has_prefix(buffer, DIRECTORY_END)) {
@@ -85,25 +92,38 @@ directory_load(FILE *fp, struct directory *directory)
 
 			g_strchomp(buffer);
 			strcpy(key, &(buffer[strlen(DIRECTORY_DIR)]));
-			if (!fgets(buffer, sizeof(buffer), fp))
-				FATAL("Error reading db, fgets\n");
+			if (!fgets(buffer, sizeof(buffer), fp)) {
+				g_set_error(error, directory_quark(), 0,
+					    "Unexpected end of file");
+				return false;
+			}
 
 			if (g_str_has_prefix(buffer, DIRECTORY_MTIME)) {
 				directory->mtime =
 					g_ascii_strtoull(buffer + sizeof(DIRECTORY_MTIME) - 1,
 							 NULL, 10);
 
-				if (!fgets(buffer, sizeof(buffer), fp))
-					FATAL("Error reading db, fgets\n");
+				if (!fgets(buffer, sizeof(buffer), fp)) {
+					g_set_error(error, directory_quark(), 0,
+						    "Unexpected end of file");
+					return false;
+				}
+			}
+
+			if (!g_str_has_prefix(buffer, DIRECTORY_BEGIN)) {
+				g_set_error(error, directory_quark(), 0,
+					    "Malformed line: %s", buffer);
+				return false;
 			}
 
-			if (!g_str_has_prefix(buffer, DIRECTORY_BEGIN))
-				FATAL("Error reading db at line: %s\n", buffer);
 			g_strchomp(buffer);
 			name = &(buffer[strlen(DIRECTORY_BEGIN)]);
-			if (!g_str_has_prefix(name, directory->path) != 0)
-				FATAL("Wrong path in database: '%s' in '%s'\n",
-				      name, directory->path);
+			if (!g_str_has_prefix(name, directory->path) != 0) {
+				g_set_error(error, directory_quark(), 0,
+					    "Wrong path in database: '%s' in '%s'",
+					    name, directory->path);
+				return false;
+			}
 
 			subdir = directory_get_child(directory, name);
 			if (subdir != NULL) {
@@ -112,11 +132,18 @@ directory_load(FILE *fp, struct directory *directory)
 				subdir = directory_new(name, directory);
 				dirvec_add(&directory->children, subdir);
 			}
-			directory_load(fp, subdir);
+
+			success = directory_load(fp, subdir, error);
+			if (!success)
+				return false;
 		} else if (g_str_has_prefix(buffer, SONG_BEGIN)) {
 			readSongInfoIntoList(fp, &directory->songs, directory);
 		} else {
-			FATAL("Unknown line in db: %s\n", buffer);
+			g_set_error(error, directory_quark(), 0,
+				    "Malformed line: %s", buffer);
+			return false;
 		}
 	}
+
+	return true;
 }
diff --git a/src/directory_save.h b/src/directory_save.h
index 54143915c..480d0ab9f 100644
--- a/src/directory_save.h
+++ b/src/directory_save.h
@@ -19,6 +19,9 @@
 #ifndef MPD_DIRECTORY_SAVE_H
 #define MPD_DIRECTORY_SAVE_H
 
+#include <glib.h>
+
+#include <stdbool.h>
 #include <stdio.h>
 
 struct directory;
@@ -26,7 +29,7 @@ struct directory;
 int
 directory_save(FILE *fp, struct directory *directory);
 
-void
-directory_load(FILE *fp, struct directory *directory);
+bool
+directory_load(FILE *fp, struct directory *directory, GError **error);
 
 #endif
-- 
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