fltrimpl.h

#ifndef CRYPTOPP_FLTRIMPL_H
#define CRYPTOPP_FLTRIMPL_H
 
#define FILTER_BEGIN    \
    switch (m_continueAt)   \
    {   \
    case 0: \
        m_inputPosition = 0;
 
#define FILTER_END_NO_MESSAGE_END_NO_RETURN \
        break;  \
    default:    \
        CRYPTOPP_ASSERT(false); \
    }
 
#define FILTER_END_NO_MESSAGE_END   \
    FILTER_END_NO_MESSAGE_END_NO_RETURN \
    return 0;
 
/*
#define FILTER_END  \
    case -1:    \
        if (messageEnd && Output(-1, NULLPTR, 0, messageEnd, blocking)) \
            return 1;   \
    FILTER_END_NO_MESSAGE_END
*/
 
#define FILTER_OUTPUT3(site, statement, output, length, messageEnd, channel)    \
    {\
    case site:  \
    (void) statement;   \
    if (Output(site, output, length, messageEnd, blocking, channel))    \
        return STDMAX(size_t(1), length-m_inputPosition);\
    }
 
#define FILTER_OUTPUT2(site, statement, output, length, messageEnd) \
    FILTER_OUTPUT3(site, statement, output, length, messageEnd, DEFAULT_CHANNEL)
 
#define FILTER_OUTPUT(site, output, length, messageEnd) \
    FILTER_OUTPUT2(site, 0, output, length, messageEnd)
 
#define FILTER_OUTPUT_BYTE(site, output)    \
    FILTER_OUTPUT(site, &(const byte &)(byte)output, 1, 0)
 
#define FILTER_OUTPUT2_MODIFIABLE(site, statement, output, length, messageEnd)  \
    {\
    /* fall through */ \
    case site:  \
    (void) statement;   \
    if (OutputModifiable(site, output, length, messageEnd, blocking))   \
        return STDMAX(size_t(1), length-m_inputPosition);\
    }
 
#define FILTER_OUTPUT_MODIFIABLE(site, output, length, messageEnd)  \
    FILTER_OUTPUT2_MODIFIABLE(site, 0, output, length, messageEnd)
 
#define FILTER_OUTPUT2_MAYBE_MODIFIABLE(site, statement, output, length, messageEnd, modifiable)    \
    {\
    /* fall through */ \
    case site:  \
    (void) statement;   \
    if (modifiable ? OutputModifiable(site, output, length, messageEnd, blocking) : Output(site, output, length, messageEnd, blocking)) \
        return STDMAX(size_t(1), length-m_inputPosition);\
    }
 
#define FILTER_OUTPUT_MAYBE_MODIFIABLE(site, output, length, messageEnd, modifiable)    \
    FILTER_OUTPUT2_MAYBE_MODIFIABLE(site, 0, output, length, messageEnd, modifiable)
 
#endif