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/*
* symbol - global and local symbol routines
*
* Copyright (C) 1999-2006 David I. Bell
*
* Calc is open software; you can redistribute it and/or modify it under
* the terms of the version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* Calc is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
* Public License for more details.
*
* A copy of version 2.1 of the GNU Lesser General Public License is
* distributed with calc under the filename COPYING-LGPL. You should have
* received a copy with calc; if not, write to Free Software Foundation, Inc.
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* @(#) $Revision: 29.6 $
* @(#) $Id: symbol.h,v 29.6 2006/05/19 15:26:10 chongo Exp $
* @(#) $Source: /usr/local/src/cmd/calc/RCS/symbol.h,v $
*
* Under source code control: 1990/02/15 01:48:37
* File existed as early as: before 1990
*
* Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
*/
#if !defined(__SYMBOL_H__)
#define __SYMBOL_H__
#if defined(CALC_SRC) /* if we are building from the calc source tree */
# include "zmath.h"
#else
# include <calc/zmath.h>
#endif
/*
* Symbol Declarations.
*/
#define SYM_UNDEFINED 0 /* undefined symbol */
#define SYM_PARAM 1 /* parameter symbol */
#define SYM_LOCAL 2 /* local symbol */
#define SYM_GLOBAL 3 /* global symbol */
#define SYM_STATIC 4 /* static symbol */
#define SCOPE_GLOBAL 0 /* file scope level for global variables */
#define SCOPE_STATIC 1 /* lowest file scope for static variables */
typedef struct global GLOBAL;
struct global {
size_t g_len; /* length of symbol name */
short g_filescope; /* file scope level of symbol (0 if global) */
short g_funcscope; /* function scope level of symbol */
char *g_name; /* global symbol name */
VALUE g_value; /* global symbol value */
GLOBAL *g_next; /* next symbol in hash chain */
};
/*
* Routines to search for global symbols.
*/
extern GLOBAL *addglobal(char *name, BOOL isstatic);
extern GLOBAL *findglobal(char *name);
/*
* Routines to return names of variables.
*/
extern char *localname(long n);
extern char *paramname(long n);
extern char *globalname(GLOBAL *sp);
/*
* Routines to handle entering and leaving of scope levels.
*/
extern void resetscopes(void);
extern void enterfilescope(void);
extern void exitfilescope(void);
extern void enterfuncscope(void);
extern void exitfuncscope(void);
extern void endscope (char *name, BOOL isglobal);
/*
* Other routines.
*/
extern long addlocal(char *name);
extern long findlocal(char *name);
extern long addparam(char *name);
extern long findparam(char *name);
extern void initlocals(void);
extern void initglobals(void);
extern int writeglobals(char *name);
extern int symboltype(char *name);
extern void showglobals(void);
extern void showallglobals(void);
extern void freeglobals(void);
extern void showstatics(void);
extern void freestatics(void);
#endif /* !__SYMBOL_H__ */
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