From 2a4d7bb5f5cecdbcbda6b9f9b531c919ecc6b161 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@systemlinux.org>
Date: Sat, 11 Jul 2009 16:53:50 +0200
Subject: [PATCH] Scoring fixes.

Rename add_item_score to get_item_score(), properly check its return value,
and use the computed score only for admissible files.
---
 error.h |  1 -
 mood.c  | 65 ++++++++++++++++++++++++++++++++++++++-------------------
 2 files changed, 43 insertions(+), 23 deletions(-)

diff --git a/error.h b/error.h
index c53ab89a..95640da9 100644
--- a/error.h
+++ b/error.h
@@ -152,7 +152,6 @@ extern const char **para_errlist[];
 #define MOOD_ERRORS \
 	PARA_ERROR(MOOD_SYNTAX, "mood syntax error"), \
 	PARA_ERROR(NO_MOOD, "no mood available"), \
-	PARA_ERROR(NOT_ADMISSIBLE, "file is not admissible"), \
 	PARA_ERROR(DUMMY_ROW, "attempted to access blob dummy object"), \
 
 
diff --git a/mood.c b/mood.c
index 540d0c70..24d1de29 100644
--- a/mood.c
+++ b/mood.c
@@ -248,14 +248,14 @@ static int mm_is_set_score_function(__a_unused const char *path,
 	return -100;
 }
 
-/* returns 1 if row matches score item, negative otherwise */
-static int add_item_score(const struct osl_row *row, struct mood_item *item, long *score,
-		long *score_arg_sum)
+/* returns 1 if row matches score item, 0 if not, negative on errors */
+static int get_item_score(const struct osl_row *row, struct mood_item *item,
+		long *score, long *score_arg_sum)
 {
 	struct afs_info afsi;
 	struct afh_info afhi;
 	char *path;
-	int ret;
+	int ret, match = 1;
 
 	*score_arg_sum += item->random_score? 100 : PARA_ABS(item->score_arg);
 	ret = 100;
@@ -273,36 +273,55 @@ static int add_item_score(const struct osl_row *row, struct mood_item *item, lon
 		ret = item->method->score_function(path, &afsi, &afhi,
 			item->parser_data);
 		if ((ret < 0 && !item->logical_not) || (ret >= 0 && item->logical_not))
-			return -1; /* no match */
+			match = 0; /* no match */
 	}
 	if (item->random_score)
-		*score += PARA_ABS(ret) * para_random(100);
+		*score = PARA_ABS(ret) * para_random(100);
 	else
-		*score += PARA_ABS(ret) * item->score_arg;
-	return 1;
+		*score = PARA_ABS(ret) * item->score_arg;
+	return match;
 }
 
+/* returns 1 if row admissible, 0 if not, negative on errors */
 static int compute_mood_score(const struct osl_row *aft_row, struct mood *m,
 		long *result)
 {
 	struct mood_item *item;
-	int match = 0;
-	long score_arg_sum = 0, score = 0;
+	int ret, match = 0;
+	long score_arg_sum = 0, score = 0, item_score;
 
 	if (!m)
 		return -E_NO_MOOD;
 	/* reject audio file if it matches any entry in the deny list */
-	list_for_each_entry(item, &m->deny_list, mood_item_node)
-		if (add_item_score(aft_row, item, &score, &score_arg_sum) > 0)
-			return -E_NOT_ADMISSIBLE;
-	list_for_each_entry(item, &m->accept_list, mood_item_node)
-		if (add_item_score(aft_row, item, &score, &score_arg_sum) > 0)
-			match = 1;
+	list_for_each_entry(item, &m->deny_list, mood_item_node) {
+		ret = get_item_score(aft_row, item, &item_score,
+			&score_arg_sum);
+		if (ret < 0)
+			return ret;
+		if (ret > 0) /* not admissible */
+			return 0;
+		score += item_score;
+	}
+	list_for_each_entry(item, &m->accept_list, mood_item_node) {
+		ret = get_item_score(aft_row, item, &item_score,
+			&score_arg_sum);
+		if (ret < 0)
+			return ret;
+		if (ret == 0)
+			continue;
+		match = 1;
+		score += item_score;
+	}
 	/* reject if there is no matching entry in the accept list */
 	if (!match && !list_empty(&m->accept_list))
-		return -E_NOT_ADMISSIBLE;
-	list_for_each_entry(item, &m->score_list, mood_item_node)
-		add_item_score(aft_row, item, &score, &score_arg_sum);
+		return 0;
+	list_for_each_entry(item, &m->score_list, mood_item_node) {
+		ret = get_item_score(aft_row, item, &item_score,
+			&score_arg_sum);
+		if (ret < 0)
+			return ret;
+		score += item_score;
+	}
 	if (score_arg_sum)
 		score /= score_arg_sum;
 	*result = score;
@@ -730,7 +749,7 @@ struct admissible_array {
  * \param aft_row The audio file to be added.
  * \param private_data Pointer to a struct admissible_file_info.
  *
- * \return Negative on errors, positive on success.
+ * \return 1 if row admissible, 0 if not, negative on errors.
  */
 static int add_if_admissible(struct osl_row *aft_row, void *data)
 {
@@ -739,8 +758,8 @@ static int add_if_admissible(struct osl_row *aft_row, void *data)
 	long score = 0;
 
 	ret = compute_mood_score(aft_row, aa->m, &score);
-	if (ret < 0)
-		return (ret == -E_NOT_ADMISSIBLE)? 1 : ret;
+	if (ret <= 0)
+		return ret;
 	if (statistics.num >= aa->size) {
 		aa->size *= 2;
 		aa->size += 100;
@@ -878,6 +897,8 @@ static int mood_update_audio_file(const struct osl_row *aft_row,
 		return ret;
 	was_admissible = ret;
 	ret = compute_mood_score(aft_row, current_mood, &score);
+	if (ret < 0)
+		return ret;
 	is_admissible = (ret > 0);
 	if (!was_admissible && !is_admissible)
 		return 1;
-- 
2.39.5