[libxml2] URI with no path parsing problem

[Daniel Veillard <veillard src gnome org>]

commit 1358fef9aa2c3fea5ed3d6ee50c7eb4d6f92b247
Author: Daniel Veillard <veillard redhat com>
Date:   Fri Oct 2 17:29:48 2009 +0200

    URI with no path parsing problem
    
    * uri.c: Ralf Junker pointed out that URI with no path
      like http://www.domain.com when parsed ended up with an
      empty path value instead of NULL, this fixes the problem

 uri.c |   48 ++++++++++++++++++++++++++++++++----------------
 1 files changed, 32 insertions(+), 16 deletions(-)
---
diff --git a/uri.c b/uri.c
index 1e5e03f..950e177 100644
--- a/uri.c
+++ b/uri.c
@@ -558,10 +558,14 @@ xmlParse3986PathAbEmpty(xmlURIPtr uri, const char **str)
     }
     if (uri != NULL) {
 	if (uri->path != NULL) xmlFree(uri->path);
-	if (uri->cleanup & 2)
-	    uri->path = STRNDUP(*str, cur - *str);
-	else
-	    uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
+        if (*str != cur) {
+            if (uri->cleanup & 2)
+                uri->path = STRNDUP(*str, cur - *str);
+            else
+                uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
+        } else {
+            uri->path = NULL;
+        }
     }
     *str = cur;
     return (0);
@@ -600,10 +604,14 @@ xmlParse3986PathAbsolute(xmlURIPtr uri, const char **str)
     }
     if (uri != NULL) {
 	if (uri->path != NULL) xmlFree(uri->path);
-	if (uri->cleanup & 2)
-	    uri->path = STRNDUP(*str, cur - *str);
-	else
-	    uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
+        if (cur != *str) {
+            if (uri->cleanup & 2)
+                uri->path = STRNDUP(*str, cur - *str);
+            else
+                uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
+        } else {
+            uri->path = NULL;
+        }
     }
     *str = cur;
     return (0);
@@ -638,10 +646,14 @@ xmlParse3986PathRootless(xmlURIPtr uri, const char **str)
     }
     if (uri != NULL) {
 	if (uri->path != NULL) xmlFree(uri->path);
-	if (uri->cleanup & 2)
-	    uri->path = STRNDUP(*str, cur - *str);
-	else
-	    uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
+        if (cur != *str) {
+            if (uri->cleanup & 2)
+                uri->path = STRNDUP(*str, cur - *str);
+            else
+                uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
+        } else {
+            uri->path = NULL;
+        }
     }
     *str = cur;
     return (0);
@@ -676,10 +688,14 @@ xmlParse3986PathNoScheme(xmlURIPtr uri, const char **str)
     }
     if (uri != NULL) {
 	if (uri->path != NULL) xmlFree(uri->path);
-	if (uri->cleanup & 2)
-	    uri->path = STRNDUP(*str, cur - *str);
-	else
-	    uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
+        if (cur != *str) {
+            if (uri->cleanup & 2)
+                uri->path = STRNDUP(*str, cur - *str);
+            else
+                uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
+        } else {
+            uri->path = NULL;
+        }
     }
     *str = cur;
     return (0);