1/*********************************************************************** 2* * 3* This software is part of the ast package * 4* Copyright (c) 1985-2011 AT&T Intellectual Property * 5* and is licensed under the * 6* Common Public License, Version 1.0 * 7* by AT&T Intellectual Property * 8* * 9* A copy of the License is available at * 10* http://www.opensource.org/licenses/cpl1.0.txt * 11* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12* * 13* Information and Software Systems Research * 14* AT&T Research * 15* Florham Park NJ * 16* * 17* Glenn Fowler <gsf@research.att.com> * 18* David Korn <dgk@research.att.com> * 19* Phong Vo <kpv@research.att.com> * 20* * 21***********************************************************************/ 22#pragma prototyped 23/* 24 * David Korn 25 * AT&T Research 26 * 27 * Interface definitions for a stack-like storage library 28 * 29 */ 30 31#ifndef _STK_H 32#define _STK_H 33 34#include <sfio.h> 35 36#define _Stk_data _Stak_data 37 38#define stkstd (&_Stk_data) 39 40#define Stk_t Sfio_t 41 42#define STK_SMALL 1 /* small stkopen stack */ 43#define STK_NULL 2 /* return NULL on overflow */ 44 45#define stkptr(sp,n) ((char*)((sp)->_data)+(n)) 46#define stktop(sp) ((char*)(sp)->_next) 47#define stktell(sp) ((sp)->_next-(sp)->_data) 48#define stkseek(sp,n) ((n)==0?(char*)((sp)->_next=(sp)->_data):_stkseek(sp,n)) 49 50#if _BLD_ast && defined(__EXPORT__) 51#define extern extern __EXPORT__ 52#endif 53#if !_BLD_ast && defined(__IMPORT__) 54#define extern extern __IMPORT__ 55#endif 56 57extern Sfio_t _Stk_data; 58 59#undef extern 60 61#if _BLD_ast && defined(__EXPORT__) 62#define extern __EXPORT__ 63#endif 64 65extern Stk_t* stkopen(int); 66extern Stk_t* stkinstall(Stk_t*, char*(*)(int)); 67extern int stkclose(Stk_t*); 68extern int stklink(Stk_t*); 69extern char* stkalloc(Stk_t*, unsigned); 70extern char* stkcopy(Stk_t*,const char*); 71extern char* stkset(Stk_t*, char*, unsigned); 72extern char* _stkseek(Stk_t*, unsigned); 73extern char* stkfreeze(Stk_t*, unsigned); 74extern int stkon(Stk_t*, char *); 75 76#undef extern 77 78#endif 79