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/*
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 <tqcstring.h>
#include <tdepimmacros.h>
#undef None
namespace KMime {
class KDE_EXPORT CharFreq {
public:
CharFreq( const TQByteArray & 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__ */
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