1 files changed, 68 insertions, 0 deletions
diff --git a/libkmime/kmime_charfreq.h b/libkmime/kmime_charfreq.h
new file mode 100644
index 000000000..12d2035cf
--- /dev/null
+++ b/libkmime/kmime_charfreq.h
@@ -0,0 +1,68 @@
+/*  -*- c++ -*-
+    kmime_charfreq.h
+
+    KMime, the KDE internet mail/usenet news message library.
+    Copyright (c) 2001-2002 Marc Mutz <mutz@kde.org>
+
+    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.
+    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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, US
+*/
+#ifndef __KMIME_CHARFREQ_H__
+#define __KMIME_CHARFREQ_H__
+
+#include <qcstring.h>
+#include <kdepimmacros.h>
+#undef None
+
+namespace KMime {
+
+class KDE_EXPORT CharFreq {
+public:
+  CharFreq( const QByteArray & buf );
+  CharFreq( const char * buf, size_t len );
+
+  enum Type { None = 0, EightBitData, Binary = EightBitData,
+	      SevenBitData, EightBitText, SevenBitText };
+
+  Type type() const;
+  bool isEightBitData() const;
+  bool isEightBitText() const;
+  bool isSevenBitData() const;
+  bool isSevenBitText() const;
+  /** Returns true if buf has trailing whitespace, i.e. if any line ends
+      with space (' ') or tab ('\t'). */
+  bool hasTrailingWhitespace() const;
+  /** Returns true if buf contains a line that starts with "From ". */
+  bool hasLeadingFrom() const;
+  /** Returns the percentage of printable characters: printable/total.
+      If total == 0, the result is undefined. */
+  float printableRatio() const;
+  /** Returns the percentage of control code (CTLs): CTL/total.
+      If total == 0, the result is undefined. */
+  float controlCodesRatio() const;
+
+protected:
+  uint NUL;       // count of NUL chars
+  uint CTL;       // count of CTLs (incl. DEL, excl. CR, LF, HT)
+  uint CR, LF;    // count of CRs and LFs
+  uint CRLF;      // count of LFs, preceded by CRs
+  uint printable; // count of printable US-ASCII chars (SPC..~)
+  uint eightBit;  // count of other latin1 chars (those with 8th bit set)
+  uint total;
+  uint lineMin;
+  uint lineMax;
+  bool mTrailingWS;  // does the buffer contain trailing whitespace?
+  bool mLeadingFrom; // does the buffer contain lines starting with "From "?
+
+private:
+  void count( const char * buf, size_t len );
+};
+
+} // namespace KMime
+
+#endif /* __KMIME_CHARFREQ_H__ */