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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.c
*
* Definition of global variables.
*/
#include "type.h" /* Needed for definition of constant */
/* cells. */
#include "buf.h" /* Needed for line_buf[YYLMAX]. */
int s; /* Number of opened files. */
int char_counter; /* Counter of characters. */
char line_buf[YYLMAX]; /* Contains whole line during lexical */
/* analysis and compiling. */
char *mem_start; /* Pointer to the memory. */
char *stack; /* Stack pointer */
char *bp; /* Base pointer.
* Used for relative addressing of variables.
*/
char *frame; /* Frame pointer.
* Used for parameter passing to
* remote functions.
*/
char **ast; /* Arithmetic stack pointer. */
char *pc; /* Program counter.
* Points to the next executed instruction.
*/
char *fixst; /* Pointer to the fixative stack */
#if 0
char **adr_stack; /* Pointer to the address stack (obsolete). */
#endif
char *tmp; /* Pointer to the stack of temporaries. */
char *tmph; /* Pointer to the current level beginning
* of the stack of temporaries.
* It is used for clearing the stack.
*/
char *tmp_start; /* Pointer to the beginning of the stack
* of temporaries.
*/
char *proc_name[256]; /* Address of function beginning. */
char *proc_name_text[256]; /* Pointer to names of remote functions. */
char *struct_union_enum_name[256]; /* Names of tags. */
struct CONTEXT *context;
int proc; /* Counter for function call.
* Used by nested calls when function is
* used as parameter.
*/
int suen_count; /* struct_union_enum_name
counter. Nesting levels of tag
declaration. */
struct internal_type
*type_com[256]; /* Complex type of an operand in
* expression (simple, array). */
int dim[256]; /* Max size of array dimensions (256). */
int poc; /* Counter of the number of dimensions
* in arrays.
*/
int remote_flag = 0; /* Flag for remote function call. */
int body_flag = 1; /* Flag of a variable body. */
int typedef_f = 1; /* If in the context can be TYPENAME
token equals 1; 0 otherwise. */
int enum_value = 0; /* Value of the enumeration specifier. */
struct internal_type *typeh[256];
int type_spec_count = 0;
/* \verbatim{global_c_remote_ptr_C.tex} */
struct remote_tab
*remote_ptr_C; /* Pointer to the structure of remote
* function table.
*/
/* \verbatim */
/* \verbatim{global_c_rp.tex} */
struct return1 *rp; /* Pointer for backpatch address of */
/* return in a function. */
/* \verbatim */
char *kodp; /* Pointer to the generated code. */
char *kodp1; /* Pointer for sweeping out unuseful */
/* code from the memory. */
char *kodp2; /* Pointer for remembering context */
/* used during context switching in */
/* interrupts. */
char *kodp3; /* Pointer for fixing returns in */
/* functions. */
char *kodp4; /* If there is l_value throw away last
PUSH instruction. */
/* Pointers to the last and current generated instruction. */
char *last_instr, *current_instr;
int count[256],count_arr=1;
int virtual_machine_suspended=1;
int clif_interrupt_level=0;
int set=0;
/* \verbatim{global_c_fixp.tex} */
union fix *fixp; /* Pointer to the fixative stack. */
/* \verbatim */
char *call_fix[256]; /* Address' backpatching during
* parameter passing. */
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