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/*
Clif - A C-like Interpreter Framework
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997 T. Hruz, L. Koren
1998 L. Koren
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; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* global.h
*
* Declaration of global variables.
*/
#ifndef _GLOBAL_H
#define _GLOBAL_H
#include <stdio.h>
#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include "ansidecl.h"
extern int s; /* Number of opened files. */
extern int line_counter,char_counter; /* Counter of lines and characters. */
extern char line_buf[]; /* Contains whole line during lexical */
/* analysis and compiling. */
extern char *mem_start; /* Pointer to the memory. */
extern char *stack; /* Stack pointer. */
extern char *bp; /* Base pointer.
* Used for relative addressing of variables.
*/
extern char *frame; /* Frame pointer.
* Used for parameter passing to
* remote functions.
*/
extern char **ast; /* Arithmetic stack pointer. */
extern char *pc; /* Program counter.
* Points to the next executed instruction.
*/
extern char *fixst; /* Pointer to the fixative stack. */
#if 0
extern char **adr_stack; /* Pointer to the address stack (obsolete). */
#endif
extern char *tmp; /* Pointer to the stack of temporaries. */
extern char *tmph; /* Pointer to the current level beginning
* of the stack of temporaries.
* It is used for clearing the stack.
*/
extern char *tmp_start; /* Pointer to the beginning of the stack
* of temporaries.
*/
extern char *proc_name[]; /* Address of function beginning. */
extern char *proc_name_text[]; /* Pointer to names of remote functions. */
extern char *struct_union_enum_name[]; /* Names of tags. */
extern struct CONTEXT *context;
extern int proc; /* Counter for function call. Used by
* nested calls when function is used as
* parameter. */
extern int suen_count; /* struct_union_enum_name
counter. Nesting levels of tag
declaration. */
extern struct internal_type
*type_com[]; /* Complex type of an operand in an expression
* (simple, array).
*/
extern struct remote_has_tab *hastab_remote;
/* Pointers to the hash table of remote
* functions.
*/
extern int dim[]; /* Max size of array dimensions (256). */
extern int poc; /* Counter of the number of dimensions
* in arrays.
*/
extern int remote_flag; /* Flag for remote function call. */
extern int body_flag; /* Flag of a variable body. */
extern int enum_value; /* Value of the enumeration specifier. */
extern struct internal_type *typeh[];
extern int type_spec_count;
extern struct remote_tab
*remote_ptr_C; /* Pointer to the structure of remote
* function table.
*/
extern struct return1 *rp; /* Pointer for backpatch address of
* return in a function.
*/
extern char *kodp; /* Pointer to the generated code. */
extern char *kodp1; /* Pointer for sweeping out unuseful */
/* code from the memory. */
extern char *kodp2; /* Pointer for remembering context */
/* used during context switching in */
/* interrupts. */
extern char *kodp3; /* Pointer for fixing returns in */
/* functions. */
extern char *kodp4; /* If there is l_value throw away last
PUSH instruction. */
/* Pointers to the last and current generated instruction. */
extern char *last_instr, *current_instr;
extern int count[], count_arr;
extern int handler; /* Interrupt service. */
extern int virtual_machine_suspended;
extern int clif_interrupt_level;
extern int set;
extern union fix *fixp; /* Pointer to the fixative stack. */
extern char *call_fix[]; /* Address' backpatching during */
/* parameter passing. */
#if 0
char *say();
#endif
extern char *text;
extern void error_message PVPROTO((int, ...));
#ifndef MSDOS
extern void interrupt_service_sync PROTO((void));
#endif
#ifndef NOT_MSWIN_AND_YES_DOS
extern void store_context PROTO((void));
extern void restore_context PROTO((void));
#endif
typedef struct fileattr FILEATTR;
struct fileattr
{
FILE *fp;
char *name;
int line_counter;
};
#ifndef MSDOS
#define HANDLER_TEST handler
#define HANDLER_SET handler = 0
#define VIRTUAL_MACHINE_SUSPENDED_SET virtual_machine_suspended = 1
#define VIRTUAL_MACHINE_SUSPENDED_RESET virtual_machine_suspended = 0
#define CLIF_INTERRUPT_LEVEL_INCREMENT ++clif_interrupt_level
#define CLIF_INTERRUPT_LEVEL_DECREMENT (clif_interrupt_level<=0?clif_interrupt_level:--clif_interrupt_level)
#endif
#ifdef MSWIN
#define HANDLER_TEST handler_t()
#define HANDLER_SET handler = 0
#define VIRTUAL_MACHINE_SUSPENDED_SET virtual_mach_sus_ss()
#define VIRTUAL_MACHINE_SUSPENDED_RESET virtual_mach_sus_rr()
#define CLIF_INTERRUPT_LEVEL_INCREMENT inter_level_p()
#define CLIF_INTERRUPT_LEVEL_DECREMENT inter_level_m()
#endif
/* Used only for debugging purposes. For compiling this use -DDEBUG
Checks kodp for right value. kodp is used by code generetion as
pointer to the end of the generated code. */
#ifdef DEBUG
#define GENCODE printfx ("kodp=%u\n", kodp); \
last_instr = current_instr; \
current_instr = kodp;
#else
#define GENCODE last_instr = current_instr; \
current_instr = kodp;
#endif
/* Checks stack overflow.
* Only if -DCHKSTACK is defined during
* compilation.
*/
#ifdef CHKSTACK
#define check_stack() if (stack <= kodp) \
{ \
error_message (4001); \
return (-2); \
}
#else
#define check_stack()
#endif
#endif /* _GLOBAL_H */
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