1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2010 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 57 extern Sfio_t _Stk_data; 58 59 #undef extern 60 61 #if _BLD_ast && defined(__EXPORT__) 62 #define extern __EXPORT__ 63 #endif 64 65 extern Stk_t* stkopen(int); 66 extern Stk_t* stkinstall(Stk_t*, char*(*)(int)); 67 extern int stkclose(Stk_t*); 68 extern int stklink(Stk_t*); 69 extern char* stkalloc(Stk_t*, unsigned); 70 extern char* stkcopy(Stk_t*,const char*); 71 extern char* stkset(Stk_t*, char*, unsigned); 72 extern char* _stkseek(Stk_t*, unsigned); 73 extern char* stkfreeze(Stk_t*, unsigned); 74 extern int stkon(Stk_t*, char *); 75 76 #undef extern 77 78 #endif 79