From 5523d3d5e0ba0fc747b9159d59bf2c57f6a79715 Mon Sep 17 00:00:00 2001
From: Oleg Oshmyan <chortos@inbox.lv>
Date: Sat, 15 Jun 2013 22:02:54 +0100
Subject: [PATCH] Fix \r style lookup

Make \rSTYLENAME with an invalid STYLENAME fall back to
line style rather than to Default. This fixes issue #104.
---
 libass/ass_parse.c |  2 +-
 libass/ass_utils.c | 20 ++++++++++++++++++++
 libass/ass_utils.h |  1 +
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/libass/ass_parse.c b/libass/ass_parse.c
index bb64971..8e76048 100644
--- a/libass/ass_parse.c
+++ b/libass/ass_parse.c
@@ -756,7 +756,7 @@ char *parse_tag(ASS_Renderer *render_priv, char *p, double pwr)
             strncpy(style, start, p - start);
             style[p - start] = '\0';
             reset_render_context(render_priv,
-                    render_priv->track->styles + lookup_style(render_priv->track, style));
+                    lookup_style_strict(render_priv->track, style));
             free(style);
         } else
             reset_render_context(render_priv, NULL);
diff --git a/libass/ass_utils.c b/libass/ass_utils.c
index df7c447..ba31261 100644
--- a/libass/ass_utils.c
+++ b/libass/ass_utils.c
@@ -224,6 +224,26 @@ int lookup_style(ASS_Track *track, char *name)
     return i;                   // use the first style
 }
 
+/**
+ * \brief find style by name as in \r
+ * \param track track
+ * \param name style name
+ * \return style in track->styles
+ * Returns NULL if no style has the given name.
+ */
+ASS_Style *lookup_style_strict(ASS_Track *track, char *name)
+{
+    int i;
+    for (i = track->n_styles - 1; i >= 0; --i) {
+        if (strcmp(track->styles[i].Name, name) == 0)
+            return track->styles + i;
+    }
+    ass_msg(track->library, MSGL_WARN,
+            "[%p]: Warning: no style named '%s' found",
+            track, name);
+    return NULL;
+}
+
 #ifdef CONFIG_ENCA
 void *ass_guess_buffer_cp(ASS_Library *library, unsigned char *buffer,
                           int buflen, char *preferred_language,
diff --git a/libass/ass_utils.h b/libass/ass_utils.h
index 2d0c6f9..e5e0ecd 100644
--- a/libass/ass_utils.h
+++ b/libass/ass_utils.h
@@ -53,6 +53,7 @@ int parse_ycbcr_matrix(char *str);
 unsigned ass_utf8_get_char(char **str);
 void ass_msg(ASS_Library *priv, int lvl, char *fmt, ...);
 int lookup_style(ASS_Track *track, char *name);
+ASS_Style *lookup_style_strict(ASS_Track *track, char *name);
 #ifdef CONFIG_ENCA
 void *ass_guess_buffer_cp(ASS_Library *library, unsigned char *buffer,
                           int buflen, char *preferred_language,
-- 
2.40.0