[PATCH v2 1/4] database: move striping of trailing '/' into helper function

[Yuri Volchkov <yuri.volchkov@gmail.com>]

Stripping trailing character is not that uncommon
operation. Particularly, the next patch has to perform it as
well. Lets move it to the separate function to avoid code duplication.

Also the new function has a little improvement: if the character to
strip is repeated several times in the end of a string, function
strips them all.

Signed-off-by: Yuri Volchkov <yuri.volchkov@gmail.com>
---
 lib/database.cc    |  3 +--
 util/string-util.c | 13 +++++++++++++
 util/string-util.h |  2 ++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/lib/database.cc b/lib/database.cc
index 8f0e22a..79eb3d6 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -858,8 +858,7 @@ notmuch_database_open_verbose (const char *path,
     notmuch->status_string = NULL;
     notmuch->path = talloc_strdup (notmuch, path);
 
-    if (notmuch->path[strlen (notmuch->path) - 1] == '/')
-	notmuch->path[strlen (notmuch->path) - 1] = '\0';
+    strip_trailing(notmuch->path, '/');
 
     notmuch->mode = mode;
     notmuch->atomic_nesting = 0;
diff --git a/util/string-util.c b/util/string-util.c
index 1812530..b010881 100644
--- a/util/string-util.c
+++ b/util/string-util.c
@@ -255,3 +255,16 @@ strcase_hash (const void *ptr)
 
     return hash;
 }
+
+void
+strip_trailing (char *str, char ch)
+{
+    int i;
+
+    for (i = strlen (str) - 1; i >= 0; i--) {
+	if (str[i] == ch)
+	    str[i] = '\0';
+	else
+	    break;
+    }
+}
diff --git a/util/string-util.h b/util/string-util.h
index 87917b8..9777061 100644
--- a/util/string-util.h
+++ b/util/string-util.h
@@ -75,6 +75,8 @@ int strcase_equal (const void *a, const void *b);
 /* GLib GHashFunc compatible case insensitive hash function */
 unsigned int strcase_hash (const void *ptr);
 
+void strip_trailing (char *str, char ch);
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.7.4