crlflex.h

伯克利做的SFTP安全文件传输协议

// crlflex.h
// declarations common to *lf*.lex
// copyright SafeTP Development Group, Inc., 2000  Terms of use are as specified in license.txt

#ifndef __CRLFLEX_H
#define __CRLFLEX_H

#include "inputsrc.h"    // StreamInputSource, StreamOutputDest

// translate between LF-terminated lines and CRLF-terminated lines
void LF_to_CRLF(StreamInputSource &source,
                StreamOutputDest &dest,
                int &CRs);

// translate the other way
void CRLF_to_LF(StreamInputSource &source,
                StreamOutputDest &dest,
                int &bareCRs, int &bareLFs);

// same thing, but output format is same as input
void CRLF_to_CRLF(StreamInputSource &source,
                  StreamOutputDest &dest,
                  int &bareCRs, int &bareLFs);

// NOTE: for the above, the 'warnings' counters (CRs, bareCRs, bareLFs)
//       should be set to 0 before the call


// type covering both CRLF_to_*
typedef void (*FromCRLFTranslator)(StreamInputSource &source,
                                   StreamOutputDest &dest,
                                   int &bareCRs, int &bareLFs);


// stuff only the scanner should see
#ifdef FLEX_SCANNER
  // turn off "condition is always true" warning, provoked by %option noyywrap
  #ifdef __BORLANDC__
    #pragma warn -ccc
  #endif

  // used by the lexer to read from a StreamInputSource
  #define YY_INPUT(buf, result, max_size) \
    result = streamSource->read(buf, max_size);

  // unfortunately, we seem to need a global variable for this;
  // the flex lexers aren't reentrant anyway (they use global state
  // variables), so the publicly-declared functions above internally
  // acquire and release the lock
  static StreamInputSource *streamSource;

  // this is what we want, and also happens to avoid a warning
  // about the 'fileno' fn under Linux
  #define YY_NEVER_INTERACTIVE 1
#endif

#endif // __CRLFLEX_H