X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fdynamic-string.c;h=dbb33a3563304cfec53e5505598096ef35e132d2;hb=ddc293871574e141e1f377b88aec2ccf90ab954a;hp=3af7fc9f56634e169b757e93c1abf8f39095597a;hpb=2a022368f4b37559de5d5621a88c648023493f75;p=sliver-openvswitch.git

diff --git a/lib/dynamic-string.c b/lib/dynamic-string.c
index 3af7fc9f5..dbb33a356 100644
--- a/lib/dynamic-string.c
+++ b/lib/dynamic-string.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -207,6 +207,32 @@ ds_get_line(struct ds *ds, FILE *file)
     }
 }
 
+/* Reads a line from 'file' into 'ds', clearing anything initially in 'ds'.
+ * Deletes comments introduced by "#" and skips lines that contains only white
+ * space (after deleting comments).
+ *
+ * Returns 0 if successful, EOF if no non-blank line was found. */
+int
+ds_get_preprocessed_line(struct ds *ds, FILE *file)
+{
+    while (!ds_get_line(ds, file)) {
+        char *line = ds_cstr(ds);
+        char *comment;
+
+        /* Delete comments. */
+        comment = strchr(line, '#');
+        if (comment) {
+            *comment = '\0';
+        }
+
+        /* Return successfully unless the line is all spaces. */
+        if (line[strspn(line, " \t\n")] != '\0') {
+            return 0;
+        }
+    }
+    return EOF;
+}
+
 char *
 ds_cstr(struct ds *ds)
 {