1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 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 * Glenn Fowler 25 * AT&T Research 26 * 27 * homogenous stack routine definitions 28 */ 29 30 #ifndef _STACK_H 31 #define _STACK_H 32 33 typedef struct stacktable* STACK; /* stack pointer */ 34 typedef struct stackposition STACKPOS; /* stack position */ 35 36 struct stackblock /* stack block cell */ 37 { 38 void** stack; /* actual stack */ 39 struct stackblock* prev; /* previous block in list */ 40 struct stackblock* next; /* next block in list */ 41 }; 42 43 struct stackposition /* stack position */ 44 { 45 struct stackblock* block; /* current block pointer */ 46 int index; /* index within current block */ 47 }; 48 49 struct stacktable /* stack information */ 50 { 51 struct stackblock* blocks; /* stack table blocks */ 52 void* error; /* error return value */ 53 int size; /* size of each block */ 54 STACKPOS position; /* current stack position */ 55 }; 56 57 /* 58 * map old names to new 59 */ 60 61 #define mkstack stackalloc 62 #define rmstack stackfree 63 #define clrstack stackclear 64 #define getstack stackget 65 #define pushstack stackpush 66 #define popstack stackpop 67 #define posstack stacktell 68 69 #if _BLD_ast && defined(__EXPORT__) 70 #define extern __EXPORT__ 71 #endif 72 73 extern STACK stackalloc(int, void*); 74 extern void stackfree(STACK); 75 extern void stackclear(STACK); 76 extern void* stackget(STACK); 77 extern int stackpush(STACK, void*); 78 extern int stackpop(STACK); 79 extern void stacktell(STACK, int, STACKPOS*); 80 81 #undef extern 82 83 #endif 84