diff options
Diffstat (limited to 'usr/src/lib/libast/common/include/stack.h')
| -rw-r--r-- | usr/src/lib/libast/common/include/stack.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/usr/src/lib/libast/common/include/stack.h b/usr/src/lib/libast/common/include/stack.h new file mode 100644 index 0000000000..4ca2de0cf4 --- /dev/null +++ b/usr/src/lib/libast/common/include/stack.h @@ -0,0 +1,83 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2007 AT&T Knowledge Ventures * +* and is licensed under the * +* Common Public License, Version 1.0 * +* by AT&T Knowledge Ventures * +* * +* A copy of the License is available at * +* http://www.opensource.org/licenses/cpl1.0.txt * +* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * +* * +* Information and Software Systems Research * +* AT&T Research * +* Florham Park NJ * +* * +* Glenn Fowler <gsf@research.att.com> * +* David Korn <dgk@research.att.com> * +* Phong Vo <kpv@research.att.com> * +* * +***********************************************************************/ +#pragma prototyped +/* + * Glenn Fowler + * AT&T Research + * + * homogenous stack routine definitions + */ + +#ifndef _STACK_H +#define _STACK_H + +typedef struct stacktable* STACK; /* stack pointer */ +typedef struct stackposition STACKPOS; /* stack position */ + +struct stackblock /* stack block cell */ +{ + void** stack; /* actual stack */ + struct stackblock* prev; /* previous block in list */ + struct stackblock* next; /* next block in list */ +}; + +struct stackposition /* stack position */ +{ + struct stackblock* block; /* current block pointer */ + int index; /* index within current block */ +}; + +struct stacktable /* stack information */ +{ + struct stackblock* blocks; /* stack table blocks */ + void* error; /* error return value */ + int size; /* size of each block */ + STACKPOS position; /* current stack position */ +}; + +/* + * map old names to new + */ + +#define mkstack stackalloc +#define rmstack stackfree +#define clrstack stackclear +#define getstack stackget +#define pushstack stackpush +#define popstack stackpop +#define posstack stacktell + +#if _BLD_ast && defined(__EXPORT__) +#define extern __EXPORT__ +#endif + +extern STACK stackalloc(int, void*); +extern void stackfree(STACK); +extern void stackclear(STACK); +extern void* stackget(STACK); +extern int stackpush(STACK, void*); +extern int stackpop(STACK); +extern void stacktell(STACK, int, STACKPOS*); + +#undef extern + +#endif |