X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flibpspp%2Fllx.c;h=3a0cbf60fce154cc7c5c88e390741236ae38cc80;hb=dd165516976c8801fbf7917c78f739b64e37b204;hp=c58f840c40a6db106d250e0cb6b5a9dec39efa5f;hpb=cb586666724d5fcbdb658ce471b85484f0a7babe;p=pspp

diff --git a/src/libpspp/llx.c b/src/libpspp/llx.c
index c58f840c40..3a0cbf60fc 100644
--- a/src/libpspp/llx.c
+++ b/src/libpspp/llx.c
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2006, 2009, 2011 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -28,8 +28,8 @@
 #include <config.h>
 #endif
 
-#include <libpspp/llx.h>
-#include "compiler.h"
+#include "libpspp/llx.h"
+#include "libpspp/compiler.h"
 #include <assert.h>
 #include <stdlib.h>
 
@@ -219,6 +219,20 @@ llx_remove_if (struct llx *r0, struct llx *r1,
   return count;
 }
 
+/* Returns the first node in R0...R1 that has data TARGET.
+   Returns NULL if no node in R0...R1 equals TARGET. */
+struct llx *
+llx_find (const struct llx *r0, const struct llx *r1, const void *target)
+{
+  const struct llx *x;
+
+  for (x = r0; x != r1; x = llx_next (x))
+    if (llx_data (x) == target)
+      return CONST_CAST (struct llx *, x);
+
+  return NULL;
+}
+
 /* Returns the first node in R0...R1 that equals TARGET
    according to COMPARE given auxiliary data AUX.
    Returns R1 if no node in R0...R1 equals TARGET. */