Refactor file-name sanitisation.

[lyx.git] / src / support / filetools.cpp

diff --git a/src/support/filetools.cpp b/src/support/filetools.cpp
index d0221151799345e1034c4ac52e54ab7077460cf4..cfb245cd549e301d2de7a3edf6b220a6dad71c97 100644 (file)
--- a/src/support/filetools.cpp
+++ b/src/support/filetools.cpp
@@ -1325,5 +1325,26 @@ std::string toHexHash(const std::string & str)
        return fromqstr(QString(hash.toHex()));
 }
 
+
+std::string sanitizeFileName(const std::string & str)
+{
+       // The list of characters to keep is probably over-restrictive,
+       // but it is not really a problem.
+       // Apart from non-ASCII characters, at least the following characters
+       // are forbidden: '/', '.', ' ', and ':'.
+       // On windows it is not possible to create files with '<', '>' or '?'
+       // in the name.
+       static std::string const keep = "abcdefghijklmnopqrstuvwxyz"
+                                  "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                                  "+-0123456789;=";
+
+       std::string name = str;
+       string::size_type pos = 0;
+       while ((pos = name.find_first_not_of(keep, pos)) != string::npos)
+               name[pos++] = '_';
+
+       return name;
+}
+
 } // namespace support
 } // namespace lyx