memsrc.h

伯克利做的SFTP安全文件传输协议

// memsrc.h
// StreamInputSource for memory buffers
// copyright SafeTP Development Group, Inc., 2000  Terms of use are as specified in license.txt

#ifndef __MEMSRC_H
#define __MEMSRC_H

#include "inputsrc.h"      // StreamInputSource

class MemoryInputSource : public StreamInputSource {
private:     // data
  char const *data;      // source buffer (*not* owned)
  int dataLen;           // length of that buffer
  char const *next;      // next char to supply

  // invariants:
  //   data != NULL
  //   dataLen >= 0
  //   0 <= (next-data) <= dataLen

private:     // funcs
  // xassert invariants hold
  void selfCheck() const;

public:      // funcs
  MemoryInputSource(char const *data, int len);

  // StreamInputSource funcs
  virtual int read(char *buffer, int buflen);

  // # of unconsumed bytes
  int remaining() const;
};

#endif // __MEMSRC_H