From 419f48d0d1b7dc10c4c25814f4d4d6067f56b6de Mon Sep 17 00:00:00 2001
From: Miguel Angel Cabrera Moya <madmac2501@gmail.com>
Date: Wed, 20 Apr 2011 22:52:36 +0200
Subject: [PATCH] parse: don't unescape inside quotes

Escaped characters inside quoted strings are supposed to be unescaped by
deserialization functions, not by parsing functions.

https://bugzilla.gnome.org/show_bug.cgi?id=648025
---
 gst/parse/types.h                    |  9 ++++++++-
 tests/check/pipelines/parse-launch.c | 15 +++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/gst/parse/types.h b/gst/parse/types.h
index 7e8b994..db1f585 100644
--- a/gst/parse/types.h
+++ b/gst/parse/types.h
@@ -69,17 +69,24 @@ static inline void
 gst_parse_unescape (gchar *str)
 {
   gchar *walk;
+  gboolean in_quotes;
 
   g_return_if_fail (str != NULL);
 
   walk = str;
+  in_quotes = FALSE;
 
   while (*walk) {
-    if (*walk == '\\') {
+    if (*walk == '\\' && !in_quotes) {
       walk++;
       /* make sure we don't read beyond the end of the string */
       if (*walk == '\0')
         break;
+    } else if (*walk == '"' && (!in_quotes || (in_quotes
+                && (*(walk - 1) != '\\')))) {
+      /* don't unescape inside quotes and don't switch
+       * state with escaped quoted inside quotes */
+      in_quotes = !in_quotes;
     }
     *str = *walk;
     str++;
diff --git a/tests/check/pipelines/parse-launch.c b/tests/check/pipelines/parse-launch.c
index 8dbe32f..e693d11 100644
--- a/tests/check/pipelines/parse-launch.c
+++ b/tests/check/pipelines/parse-launch.c
@@ -145,6 +145,8 @@ GST_END_TEST;
 #define PIPELINE11 "fakesink silent=true name = sink identity silent=true name=id ( fakesrc num-buffers=\"4\" ! id. ) id. ! sink."
 #define PIPELINE12 "file:///tmp/test.file ! fakesink silent=true"
 #define PIPELINE13 "fakesrc ! file:///tmp/test.file"
+#define PIPELINE14 "capsfilter caps=application/x-rtp,sprop-parameter-sets=(string)\"x\\,x\""
+#define PIPELINE15 "capsfilter caps=application/x-rtp,sprop-parameter-sets=(string)\"x\\\"x\\,x\""
 
 GST_START_TEST (test_launch_lines2)
 {
@@ -285,6 +287,19 @@ GST_START_TEST (test_launch_lines2)
    * This should warn, but ignore the error and carry on */
   cur = setup_pipeline ("( filesrc blocksize=4 location=/dev/null @ )");
   gst_object_unref (cur);
+
+  /**
+   * Checks if characters inside quotes are not escaped.
+  */
+  cur = setup_pipeline (PIPELINE14);
+  gst_object_unref (cur);
+
+  /**
+   * Checks if escaped quotes inside quotes are not treated as end string quotes.
+   * This would make the rest of characters to be escaped incorrectly.
+   */
+  cur = setup_pipeline (PIPELINE15);
+  gst_object_unref (cur);
 }
 
 GST_END_TEST;
-- 
2.7.4