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/* DSTART */
/* */
/* maildrop - mail delivery agent with filtering abilities */
/* */
/* Copyright 1998, Double Precision Inc. */
/* */
/* This program is distributed under the terms of the GNU General Public */
/* License. See COPYING for additional information. */
/* DEND */
#ifndef buffer_h
#define buffer_h
static const char buffer_h_rcsid[]="$Id: buffer.h 1.2 1998/06/21 17:49:09 mrsam Exp $";
#include <string.h>
///////////////////////////////////////////////////////////////////////////
//
// Generic text/data buffer. Not null-terminated by default.
//
// This class is used to store arbitrary text strings. It is used by
// the lexical scanner to build up text that's recognized as a token,
// and the rest of the code to store strings.
//
///////////////////////////////////////////////////////////////////////////
class Buffer {
unsigned char *buf;
int bufsize;
int buflength;
public:
Buffer() : buf(0), bufsize(0), buflength(0) {}
~Buffer() { if (buf) delete[] buf; }
const unsigned char *Ptr() const { return (buf); }
operator const unsigned char *() const { return (buf); }
operator const char *() const { return ((const char *)buf); }
int Int(const char * =0) const;
int Length() const { return (buflength); }
void Length(int l) { if (l < buflength) buflength=l; }
Buffer(const Buffer &); // UNDEFINED
Buffer &operator=(const Buffer &);
void push(int c) { if (buflength < bufsize)
{
buf[buflength]=c;
++buflength;
}
else append(c); }
int pop() { return (buflength ? buf[--buflength]:0); }
int peek() { return (buflength ? buf[buflength-1]:0); }
void reset() { buflength=0; }
private:
void append(int);
public:
void append(const void *, int);
void set(const char *);
void append(const char *p) { append(p, strlen(p)); }
void set(unsigned long n) { buflength=0; append(n); }
void append(unsigned long n);
void append(double);
Buffer &operator=(const char *p) { set(p); return (*this); }
Buffer &operator += (const Buffer &p) { append(p.buf, p.buflength); return (*this); }
Buffer &operator += (const char *p) { append(p, strlen(p)); return (*this); }
Buffer &operator += (char c) { push(c); return (*this); }
int operator-(const Buffer &) const;
int operator-(const char *) const;
int operator==(const Buffer &b) const
{ return ( operator-(b) == 0); }
int operator==(const char *b) const
{ return ( operator-(b) == 0); }
} ;
#endif
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