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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 4.iso
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fax
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StackBuffer.h
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1994-08-01
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/* $Header: /usr/people/sam/fax/util/RCS/StackBuffer.h,v 1.4 1994/02/28 14:23:57 sam Rel $ */
/*
* Copyright (c) 1990, 1991, 1992, 1993, 1994 Sam Leffler
* Copyright (c) 1991, 1992, 1993, 1994 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the names of
* Sam Leffler and Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Sam Leffler and Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef _StackBuffer_
#define _StackBuffer_
#include "Types.h"
// A growable buffer of characters, designed to be used on the cpu stack.
// It contains an internal buffer, and avoids allocating memory from
// freestore, unless the buffer is insufficient to the task at hand.
class fxStackBuffer {
public:
fxStackBuffer(u_int amountToGrowBy = 0);
fxStackBuffer(const fxStackBuffer& sb);
~fxStackBuffer();
void put(char c); // Put the character "c" into the buffer
void put(char const* c, u_int len); // Put bunch of bytes in the buffer
void put(char const* c);
void set(char c); // Stick in char w/o extending length
void reset(); // Reset buffer to empty
u_int getLength() const; // Return number of bytes in buffer
// NB: the buffer is *NOT* null terminated, unless you put one there.
operator char*(); // Return base of buffer
protected:
char buf[1000];
char* next;
char* end;
char* base;
u_int amountToGrowBy;
void addc(char c); // make room & add a char to the buffer
void grow(u_int amount); // make more room in the buffer
};
inline void fxStackBuffer::put(char c)
{ if (next < end) *next++ = c; else addc(c); }
inline void fxStackBuffer::put(char const* c) { put(c, strlen(c)); }
inline void fxStackBuffer::set(char c) { put(c); next--; }
inline void fxStackBuffer::reset() { next = base; }
inline fxStackBuffer::operator char*() { return base; }
inline u_int fxStackBuffer::getLength() const { return next - base; }
#endif /* _StackBuffer_ */