global.h

操作系统源代码

/* global.h:  The global variables for bc.  */

/*  This file is part of bc written for MINIX.
    Copyright (C) 1991, 1992 Free Software Foundation, Inc.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License , or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; see the file COPYING.  If not, write to
    the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

    You may contact the author by:
       e-mail:  [e-mail]
      us-mail:  Philip A. Nelson
                Computer Science Department, 9062
                Western Washington University
                Bellingham, WA 98226-9062
       
*************************************************************************/


/* For the current "break level" and if statements. */
EXTERN int break_label;
EXTERN int if_label;
EXTERN int continue_label;

/* Label numbers. */
EXTERN int next_label;

/* Used for "code" generation. */
EXTERN char genstr[80];
EXTERN int out_count;
EXTERN char did_gen;

/* Interactive and other flags. */
EXTERN char interactive;
EXTERN char compile_only;
EXTERN char use_math;
EXTERN char warn_not_std;
EXTERN char std_only;

/* global variables for the bc machine. All will be dynamic in size.*/
/* Function storage. main is (0) and functions (1-f_count) */

EXTERN bc_function *functions;
EXTERN char **f_names;
EXTERN int  f_count;

/* Variable stoarge and reverse names. */

EXTERN bc_var **variables;
EXTERN char **v_names;
EXTERN int  v_count;

/* Array Variable storage and reverse names. */

EXTERN bc_var_array **arrays;
EXTERN char **a_names;
EXTERN int  a_count;

/* Execution stack. */
EXTERN estack_rec *ex_stack;

/* Function return stack. */
EXTERN fstack_rec *fn_stack;

/* Other "storage". */
EXTERN int i_base;
EXTERN int o_base;
EXTERN int scale;
EXTERN char c_code;
EXTERN int out_col;
EXTERN char runtime_error;
EXTERN program_counter pc;

/* Input Line numbers and other error information. */
EXTERN int line_no;
EXTERN int had_error;

/* For larger identifiers, a tree, and how many "storage" locations
   have been allocated. */

EXTERN int next_array;
EXTERN int next_func;
EXTERN int next_var;

EXTERN id_rec *name_tree;

/* For error message production */
EXTERN char **g_argv;
EXTERN int    g_argc;
EXTERN char   is_std_in;

/* defined in number.c */
extern bc_num _zero_;
extern bc_num _one_;

/* For use with getopt.  Do not declare them here.*/
extern int optind;