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mc/slang/_slang.h

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/* header file for S-Lang internal structures that users do not (should not)
need. Use slang.h for that purpose. */
/* Copyright (c) 1992, 1995 John E. Davis
* All rights reserved.
*
* You may distribute under the terms of either the GNU General Public
* License or the Perl Artistic License.
*/
#include "config.h"
#include <string.h>
#include <glib.h>
#include "slang-mc.h"
#include "jdmacros.h"
#ifdef VMS
# define SLANG_SYSTEM_NAME "_VMS"
#else
# if defined (__GO32__) || defined (__EMX__) || \
defined (msdos) || defined (__os2__)
# define SLANG_SYSTEM_NAME "_IBMPC"
# else
# define SLANG_SYSTEM_NAME "_UNIX"
# endif
#endif /* VMS */
#ifdef msdos
#define SLANG_MAX_SYMBOLS 500
#else
#define SLANG_MAX_SYMBOLS 2500
#endif
/* maximum number of global symbols--- slang builtin, functions, global vars */
/* These quantities are main_types for byte-compiled code. They are used
* by the inner_interp routine. The ones commented out with a // are
* actually defined in slang.h because they are also used as the main_type in
* the name table.
*/
/* // #define SLANG_LVARIABLE 0x01 */
#define SLANG_LOGICAL 0x02
#define SLANG_BINARY 0x03
/* // #define SLANG_INTRINSIC 0x06 */
/* // #define SLANG_FUNCTION 0x07 */
#define SLANG_LITERAL 0x08 /* constant objects */
#define SLANG_BLOCK 0x09
#define SLANG_EQS 0x0A
#define SLANG_UNARY 0x0B
#define SLANG_LUNARY 0x0C
/* // #define SLANG_GVARIABLE 0x0D */
/* // #define SLANG_IVARIABLE 0x0E */ /* intrinsic variables */
/* // #define SLANG_RVARIABLE 0x0F */ /* read only variable */
/* These 3 MUST be in this order too ! */
#define SLANG_RETURN 0x10
#define SLANG_BREAK 0x11
#define SLANG_CONTINUE 0x12
#define SLANG_EXCH 0x13
#define SLANG_LABEL 0x14
#define SLANG_LOBJPTR 0x15
#define SLANG_GOBJPTR 0x16
#define SLANG_X_ERROR 0x17
/* These must be in this order */
#define SLANG_X_USER0 0x18
#define SLANG_X_USER1 0x19
#define SLANG_X_USER2 0x1A
#define SLANG_X_USER3 0x1B
#define SLANG_X_USER4 0x1C
#ifdef SLANG_NOOP
# define SLANG_NOOP_DIRECTIVE 0x2F
#endif
/* If SLANG_DATA occurs as the main_type for an object in the interpreter's
* byte-code, it currently refers to a STRING.
*/
/* // #define SLANG_DATA 0x30 */ /* real objects which may be destroyed */
/* Subtypes */
#define ERROR_BLOCK 0x01
/* gets executed if block encounters error other than stack related */
#define EXIT_BLOCK 0x02
#define USER_BLOCK0 0x03
#define USER_BLOCK1 0x04
#define USER_BLOCK2 0x05
#define USER_BLOCK3 0x06
#define USER_BLOCK4 0x07
/* The user blocks MUST be in the above order */
/* directive subtypes */
#define SLANG_LOOP_MASK 0x80
#define SLANG_LOOP 0x81
#define SLANG_WHILE 0x82
#define SLANG_FOR 0x83
#define SLANG_FOREVER 0x84
#define SLANG_CFOR 0x85
#define SLANG_DOWHILE 0x86
#define SLANG_IF_MASK 0x40
#define SLANG_IF 0x41
#define SLANG_IFNOT 0x42
#define SLANG_ELSE 0x43
/* local, global variable assignments
* The order here is important. See interp_variable_eqs to see how this
* is exploited. */
#define SLANG_EQS_MASK 0x20
/* local variables */
/* Keep these in this order!! */
#define SLANG_LEQS 0x21
#define SLANG_LPEQS 0x22
#define SLANG_LMEQS 0x23
#define SLANG_LPP 0x24
#define SLANG_LMM 0x25
/* globals */
/* Keep this on this order!! */
#define SLANG_GEQS 0x26
#define SLANG_GPEQS 0x27
#define SLANG_GMEQS 0x28
#define SLANG_GPP 0x29
#define SLANG_GMM 0x2A
/* intrinsic variables */
#define SLANG_IEQS 0x2B
#define SLANG_IPEQS 0x2C
#define SLANG_IMEQS 0x2D
#define SLANG_IPP 0x2E
#define SLANG_IMM 0x2F
#define SLANG_ELSE_MASK 0x10
#define SLANG_ANDELSE 0x11
#define SLANG_ORELSE 0x12
#define SLANG_SWITCH 0x13
/* LOGICAL SUBTYPES (operate on integers) */
#define SLANG_MOD 16
#define SLANG_OR 17
#define SLANG_AND 18
#define SLANG_BAND 19
#define SLANG_BOR 20
#define SLANG_BXOR 21
#define SLANG_SHL 22
#define SLANG_SHR 23
/* LUnary Subtypes */
#define SLANG_NOT 24
#define SLANG_BNOT 25
typedef struct SLBlock_Type
{
unsigned char main_type;
unsigned char sub_type;
union
{
struct SLBlock_Type *blk;
int i_blk;
SLang_Name_Type *n_blk;
char *s_blk;
#ifdef FLOAT_TYPE
float64 *f_blk; /*literal float is a pointer */
#endif
long l_blk;
}
b;
}
SLBlock_Type;
typedef struct
{
unsigned char main_type; /* block, intrinsic... */
unsigned char sub_type; /* SLANG_WHILE, SLANG_DATA, ... */
union
{
long l_val;
char *s_val;
int i_val;
SLuser_Object_Type *uobj;
SLang_Name_Type *n_val;
#ifdef FLOAT_TYPE
float64 f_val;
#endif
} v;
} SLang_Object_Type;
extern void SLang_free_object (SLang_Object_Type *);
extern int SLang_pop_non_object (SLang_Object_Type *);
extern void _SLdo_error (char *, ...);
extern void SLcompile(char *);
extern void (*SLcompile_ptr)(char *);
typedef struct
{
char *name; int type;
} SLang_Name2_Type;
extern void SLstupid_hash(void);
typedef struct SLName_Table
{
struct SLName_Table *next; /* next table */
SLang_Name_Type *table; /* pointer to table */
int n; /* entries in this table */
char name[32]; /* name of table */
int ofs[256]; /* offsets into table */
} SLName_Table;
extern SLName_Table *SLName_Table_Root;
#ifdef MSWINDOWS
extern SLang_Name_Type *SLang_Name_Table;
#else
extern SLang_Name_Type SLang_Name_Table[SLANG_MAX_SYMBOLS];
#endif
extern SLang_Name2_Type SL_Binary_Ops [];
extern SLang_Object_Type *SLStack_Pointer;
extern char *SLbyte_compile_name(char *);
extern int SLang_pop(SLang_Object_Type *);
extern char *SLexpand_escaped_char(char *, char *);
extern void SLexpand_escaped_string (char *, char *, char *);
extern SLang_Object_Type *_SLreverse_stack (int);
extern SLang_Name_Type *SLang_locate_name(char *);
/* returns a pointer to a MALLOCED string */
extern char *SLstringize_object (SLang_Object_Type *);
/* array types */
typedef struct SLArray_Type
{
unsigned char type; /* int, float, etc... */
int dim; /* # of dims (max 3) */
int x, y, z; /* actual dims */
union
{
unsigned char *c_ptr;
unsigned char **s_ptr;
int *i_ptr;
#ifdef FLOAT_TYPE
float64 *f_ptr;
#endif
SLuser_Object_Type **u_ptr;
}
buf;
unsigned char flags; /* readonly, etc... If this is non-zero,
* the buf pointer will NOT be freed.
* See SLarray_free_array.
*/
} SLArray_Type;
/* Callback to delete array */
extern void SLarray_free_array (long *);
/* maximum size of run time stack */
#ifdef msdos
#define SLANG_MAX_STACK_LEN 500
#else
#define SLANG_MAX_STACK_LEN 2500
#endif
#ifdef MSWINDOWS
extern SLang_Object_Type *SLRun_Stack;
#else
extern SLang_Object_Type SLRun_Stack[SLANG_MAX_STACK_LEN];
#endif
extern SLang_Object_Type *SLStack_Pointer;
extern int SLang_Trace;
extern int SLstack_depth(void);
extern void SLang_trace_fun(char *);
extern void SLexecute_function(SLang_Name_Type *);
extern char *SLmake_string (char *);
extern int _SLeqs_name(char *, SLang_Name2_Type *);
extern void SLang_push(SLang_Object_Type *);
extern void SLang_push_float(float64);
extern void SLadd_variable(char *);
extern void SLang_clear_error(void);
extern void SLarray_info (void);
extern int SLPreprocess_Only; /* preprocess instead of
* bytecompiling
*/
extern void SLdo_pop (void);
extern unsigned int SLsys_getkey (void);
extern int SLsys_input_pending (int);
#ifdef REAL_UNIX_SYSTEM
extern int SLtt_tigetflag (char *, char **);
extern int SLtt_tigetnum (char *, char **);
extern char *SLtt_tigetstr (char *, char **);
extern char *SLtt_tigetent (char *);
#endif
#ifdef msdos
#define MAX_INPUT_BUFFER_LEN 40
#else
#define MAX_INPUT_BUFFER_LEN 1024
#endif
extern unsigned char SLang_Input_Buffer [MAX_INPUT_BUFFER_LEN];
extern unsigned int SLang_Input_Buffer_Len;
extern int SLregister_types (void);
#ifndef pc_system
extern char *SLtt_Graphics_Char_Pairs;
#endif /* NOT pc_system */
extern void _SLerrno_set_return_status (void);
extern char *_SLerrno_strerror (void);
extern int _SLerrno_Return_Status;
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