subs: move vobsub loading logic down to find_subfiles.c

Analogously to the previous commit, move path handling logic for
loading external vobsub files from mplayer.c to find_subfiles.c.

Based on a commit from Clément Bœsch but fixed and simplified.

1 files changed, 8 insertions, 0 deletions

diff --git a/bstr.c b/bstr.c
index d86b488912..f4d3bdef42 100644
--- a/bstr.c
+++ b/bstr.c
@@ -62,6 +62,14 @@ int bstrchr(struct bstr str, int c)
     return -1;
 }
 
+int bstrrchr(struct bstr str, int c)
+{
+    for (int i = str.len - 1; i >= 0; i--)
+        if (str.start[i] == c)
+            return i;
+    return -1;
+}
+
 struct bstr bstr_strip(struct bstr str)
 {
     while (str.len && isspace(*str.start)) {