simplify function specifications in CTABLES

[pspp] / src / libpspp / str.c

diff --git a/src/libpspp/str.c b/src/libpspp/str.c
index 811674225c23c9f0f8f757bab266ccae662b7c38..45187ef12bbc75a6d108ea4eaa3cbbaf6c58106f 100644 (file)
--- a/src/libpspp/str.c
+++ b/src/libpspp/str.c
@@ -615,6 +615,21 @@ ss_match_string (struct substring *ss, const struct substring target)
     return false;
 }
 
+/* If SS begins with TARGET, except possibly for case differences, removes it
+   and returns true.  Otherwise, returns false without changing SS. */
+bool
+ss_match_string_case (struct substring *ss, const struct substring target)
+{
+  size_t length = ss_length (target);
+  if (ss_equals_case (ss_head (*ss, length), target))
+    {
+      ss_advance (ss, length);
+      return true;
+    }
+  else
+    return false;
+}
+
 /* Removes the first byte from SS and returns it.
    If SS is empty, returns EOF without modifying SS. */
 int