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107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/*
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* symbol - global and local symbol routines
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*
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* Copyright (C) 1999-2007,2014 David I. Bell
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*
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* Calc is open software; you can redistribute it and/or modify it under
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* the terms of the version 2.1 of the GNU Lesser General Public License
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* as published by the Free Software Foundation.
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*
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* Calc is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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* Public License for more details.
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*
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* A copy of version 2.1 of the GNU Lesser General Public License is
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* distributed with calc under the filename COPYING-LGPL. You should have
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* received a copy with calc; if not, write to Free Software Foundation, Inc.
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Under source code control: 1990/02/15 01:48:37
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* File existed as early as: before 1990
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*
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* Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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*/
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#if !defined(INCLUDE_SYMBOL_H)
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#define INCLUDE_SYMBOL_H
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#if defined(CALC_SRC) /* if we are building from the calc source tree */
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# include "zmath.h"
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#else
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# include <calc/zmath.h>
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#endif
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/*
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* Symbol Declarations.
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*/
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#define SYM_UNDEFINED 0 /* undefined symbol */
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#define SYM_PARAM 1 /* parameter symbol */
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#define SYM_LOCAL 2 /* local symbol */
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#define SYM_GLOBAL 3 /* global symbol */
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#define SYM_STATIC 4 /* static symbol */
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#define SCOPE_GLOBAL 0 /* file scope level for global variables */
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#define SCOPE_STATIC 1 /* lowest file scope for static variables */
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typedef struct global GLOBAL;
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struct global {
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size_t g_len; /* length of symbol name */
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short g_filescope; /* file scope level of symbol (0 if global) */
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short g_funcscope; /* function scope level of symbol */
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char *g_name; /* global symbol name */
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VALUE g_value; /* global symbol value */
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GLOBAL *g_next; /* next symbol in hash chain */
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};
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/*
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* Routines to search for global symbols.
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*/
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E_FUNC GLOBAL *addglobal(char *name, bool isstatic);
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E_FUNC GLOBAL *findglobal(char *name);
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/*
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* Routines to return names of variables.
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*/
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E_FUNC char *localname(long n);
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E_FUNC char *paramname(long n);
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E_FUNC char *globalname(GLOBAL *sp);
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/*
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* Routines to handle entering and leaving of scope levels.
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*/
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E_FUNC void resetscopes(void);
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E_FUNC void enterfilescope(void);
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E_FUNC void exitfilescope(void);
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E_FUNC void enterfuncscope(void);
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E_FUNC void exitfuncscope(void);
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E_FUNC void endscope (char *name, bool isglobal);
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/*
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* Other routines.
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*/
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E_FUNC long addlocal(char *name);
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E_FUNC long findlocal(char *name);
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E_FUNC long addparam(char *name);
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E_FUNC long findparam(char *name);
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E_FUNC void initlocals(void);
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E_FUNC void initglobals(void);
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E_FUNC int writeglobals(char *name);
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E_FUNC int symboltype(char *name);
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E_FUNC void showglobals(void);
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E_FUNC void showallglobals(void);
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E_FUNC void freeglobals(void);
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E_FUNC void showstatics(void);
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E_FUNC void freestatics(void);
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#endif /* !INCLUDE_SYMBOL_H */
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