rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 80 insertions, 0 deletions

diff --git a/libs/pbd/whitespace.cc b/libs/pbd/whitespace.cc
new file mode 100644
index 0000000000..b09d830103
--- /dev/null
+++ b/libs/pbd/whitespace.cc
@@ -0,0 +1,80 @@
+/*
+    Copyright (C) 2000-2007 Paul Davis 
+
+    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
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <pbd/whitespace.h>
+
+using namespace std;
+
+namespace PBD {
+	
+void
+strip_whitespace_edges (string& str)
+{   
+    string::size_type i; 
+    string::size_type len;    
+    string::size_type s = 0;
+			            
+    len = str.length();
+
+    if (len == 1) {
+	    return;
+    }
+
+    /* strip front */
+				        
+    for (i = 0; i < len; ++i) {
+        if (isgraph (str[i])) {
+            break;
+        }
+    }
+
+    if (i == len) {
+	    /* it's all whitespace, not much we can do */
+		str = "";
+	    return;
+    }
+
+    /* strip back */
+    
+    if (len > 1) {
+    
+	    s = i;
+	    i = len - 1;
+
+	    if (s == i) {
+		    return;
+	    }
+	    
+	    do {
+		    if (isgraph (str[i]) || i == 0) {
+			    break;
+		    }
+
+		    --i;
+
+	    } while (true); 
+	    
+	    str = str.substr (s, (i - s) + 1);
+
+    } else {
+	    str = str.substr (s);
+    }
+}
+
+} // namespace PBD