string: Add an inline g_string_truncate too

This is another very commonly used
GString function.

2 files changed, 14 insertions, 2 deletions

diff --git a/glib/gstring.c b/glib/gstring.c
index ed6f03123..8967ce12b 100644
--- a/glib/gstring.c
+++ b/glib/gstring.c
@@ -358,8 +358,8 @@ g_string_assign (GString     *string,
  * Returns: (transfer none): @string
  */
 GString *
-g_string_truncate (GString *string,
-                   gsize    len)
+(g_string_truncate) (GString *string,
+                     gsize    len)
 {
   g_return_val_if_fail (string != NULL, NULL);
 
diff --git a/glib/gstring.h b/glib/gstring.h
index 70888217c..00dea325b 100644
--- a/glib/gstring.h
+++ b/glib/gstring.h
@@ -204,9 +204,21 @@ g_string_append_len_inline (GString    *gstring,
 }
 #define g_string_append_len(gstr,val,len) g_string_append_len_inline (gstr, val, len)
 
+static inline GString *
+g_string_truncate_inline (GString *gstring,
+                          gsize    len)
+{
+  gstring->len = MIN (len, gstring->len);
+  gstring->str[gstring->len] = '\0';
+  return gstring;
+}
+
+#define g_string_truncate(gstr,len) g_string_truncate_inline (gstr, len)
+
 #if G_GNUC_CHECK_VERSION (2, 0)
 
 #define g_string_append(gstr,val) g_string_append_len (gstr, val, __builtin_constant_p (val) ? (gssize) strlen (val) : (gssize) -1)
+
 #endif
 
 #endif /* G_CAN_INLINE */