cvsroot/microscheme/scheme-private.h


/* scheme-private.h */

#ifndef SCHEME_PRIVATE_H
# define SCHEME_PRIVATE_H

# include "scheme.h"

/*------------------ Ugly internals -----------------------------------*/

/*------------------ Of interest only to FFI users --------------------*/

# ifdef __cplusplus
extern "C"
{
# endif

enum scheme_port_kind
{
  port_free = 0,
  port_file = 1,
  port_string = 2,
  port_srfi6 = 4,
  port_input = 16,
  port_output = 32,
  port_saw_EOF = 64
};

typedef struct port
{
  unsigned char kind;
  int16_t unget;
  union
  {
    struct
    {
      int file;
      int closeit;
# if SHOW_ERROR_LINE
      int curr_line;
      char *filename;
# endif
    } stdio;
    struct
    {
      char *start;
      char *past_the_end;
      char *curr;
    } string;
  } rep;
} port;

/* cell structure */
struct cell
{
  union
  {
    struct
    {
      char *svalue;
      int length;
    } string;

    num number;

    port *port;

    foreign_func ff;

    struct
    {
      struct cell *car;
      struct cell *cdr;
    } cons;

  } object;

  unsigned int flag;
};

/* frequently accessed members are near the beginning, reducing codesize esp. on CISC */
struct scheme
{
  /* NIL is the most commonly accessed value */
  struct cell xNIL;           /* special cell representing empty cell */

  /* We use 4 registers. */
  pointer args;               /* register for arguments of function */
  pointer envir;              /* stack register for current environment */
  pointer code;               /* register for current code */
  pointer dump;               /* stack register for next evaluation */

  struct cell xT;             /* special cell representing #t */
  struct cell xF;             /* special cell representing #f */
  struct cell xEOF_OBJ;       /* special cell representing end-of-file object */
  struct cell xsink;          /* when mem. alloc. fails */

  /* arrays for segments */
#ifndef CELL_SEGSIZE
# define CELL_SEGSIZE    128   /* # of cells in one segment */
#endif
#ifndef CELL_NSEGMENT
# define CELL_NSEGMENT   10     /* # of segments for cells */
#endif
  char *alloc_seg[CELL_NSEGMENT];
  pointer cell_seg[CELL_NSEGMENT];
  int cell_segsize[CELL_NSEGMENT];
  int last_cell_seg;

  int interactive_repl;       /* are we in an interactive REPL? */

  pointer oblist;             /* pointer to symbol table */
  pointer global_env;         /* pointer to global environment */
  pointer c_nest;             /* stack for nested calls from C */

  /* global pointers to special symbols */
  pointer LAMBDA;             /* pointer to syntax lambda */
  pointer QUOTE;              /* pointer to syntax quote */

  pointer QQUOTE;             /* pointer to symbol quasiquote */
  pointer UNQUOTE;            /* pointer to symbol unquote */
  pointer UNQUOTESP;          /* pointer to symbol unquote-splicing */
  pointer FEED_TO;            /* => */
  pointer COLON_HOOK;         /* *colon-hook* */
  pointer ERROR_HOOK;         /* *error-hook* */
  pointer SHARP_HOOK;         /* *sharp-hook* */
  pointer COMPILE_HOOK;       /* *compile-hook* */

  pointer free_cell;          /* pointer to top of free cells */
  long fcells;                /* # of free cells */

  /* return code */
  int retcode;
  int tracing;

  pointer inport;
  pointer outport;
  pointer save_inport;
  pointer loadport;

# define MAXFIL 64
  port load_stack[MAXFIL];    /* Stack of open files for port -1 (LOADing) */
  int nesting_stack[MAXFIL];
  int file_i;
  int nesting;

  char gc_verbose;            /* if gc_verbose is not zero, print gc status */
  char no_memory;             /* Whether mem. alloc. has failed */

# define LINESIZE 1024
  char linebuff[LINESIZE];
# define STRBUFFSIZE 256
  char strbuff[STRBUFFSIZE];

  int tmpfp;
  int tok;
  int print_flag;
  pointer value;
  int op;

  void *ext_data;             /* For the benefit of foreign functions */
  long gensym_cnt;

  struct scheme_interface *vptr;
  struct dump_stack_frame *dump_base; /* pointer to base of allocated dump stack */
  int dump_size;                      /* number of frames allocated for dump stack */
};

/* operator code */
enum scheme_opcodes
{
# define OP_DEF(A,B,C,D,E,OP) OP,
# include "opdefines.h"
  OP_MAXDEFINED
};

# define cons(a,b) xcons(SCHEME_A_ a,b,0)
# define immutable_cons(a,b) xcons(SCHEME_A_ a,b,1)

INTERFACE int is_string (pointer p);
INTERFACE char *string_value (pointer p);
INTERFACE int is_number (pointer p);
INTERFACE num nvalue (pointer p);
INTERFACE IVALUE ivalue (pointer p);
INTERFACE RVALUE rvalue (pointer p);
INTERFACE int is_integer (pointer p);
INTERFACE int is_real (pointer p);
INTERFACE int is_character (pointer p);
INTERFACE long charvalue (pointer p);
INTERFACE int is_vector (pointer p);

INTERFACE int is_port (pointer p);

INTERFACE int is_pair (pointer p);
INTERFACE pointer pair_car (pointer p);
INTERFACE pointer pair_cdr (pointer p);
INTERFACE void set_car (pointer p, pointer q);
INTERFACE void set_cdr (pointer p, pointer q);

INTERFACE int is_symbol (pointer p);
INTERFACE char *symname (pointer p);
INTERFACE int hasprop (pointer p);

INTERFACE int is_syntax (pointer p);
INTERFACE int is_proc (pointer p);
INTERFACE int is_foreign (pointer p);
INTERFACE char *syntaxname (pointer p);
INTERFACE int is_closure (pointer p);
# ifdef USE_MACRO
INTERFACE int is_macro (pointer p);
# endif
INTERFACE pointer closure_code (pointer p);
INTERFACE pointer closure_env (pointer p);

INTERFACE int is_continuation (pointer p);
INTERFACE int is_promise (pointer p);
INTERFACE int is_environment (pointer p);
INTERFACE int is_immutable (pointer p);
INTERFACE void setimmutable (pointer p);

# ifdef __cplusplus
}
# endif

#endif

/*
Local variables:
c-file-style: "k&r"
End:
*/
Revision:	1.1
Committed:	Wed Nov 25 05:02:56 2015 UTC (8 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Log Message:	* empty log message *
#	Content
1
2	/* scheme-private.h */
3
4	#ifndef SCHEME_PRIVATE_H
5	# define SCHEME_PRIVATE_H
6
7	# include "scheme.h"
8
9	/------------------ Ugly internals -----------------------------------/
10
11	/------------------ Of interest only to FFI users --------------------/
12
13	# ifdef __cplusplus
14	extern "C"
15	{
16	# endif
17
18	enum scheme_port_kind
19	{
20	port_free = 0,
21	port_file = 1,
22	port_string = 2,
23	port_srfi6 = 4,
24	port_input = 16,
25	port_output = 32,
26	port_saw_EOF = 64
27	};
28
29	typedef struct port
30	{
31	unsigned char kind;
32	int16_t unget;
33	union
34	{
35	struct
36	{
37	int file;
38	int closeit;
39	# if SHOW_ERROR_LINE
40	int curr_line;
41	char *filename;
42	# endif
43	} stdio;
44	struct
45	{
46	char *start;
47	char *past_the_end;
48	char *curr;
49	} string;
50	} rep;
51	} port;
52
53	/* cell structure */
54	struct cell
55	{
56	union
57	{
58	struct
59	{
60	char *svalue;
61	int length;
62	} string;
63
64	num number;
65
66	port *port;
67
68	foreign_func ff;
69
70	struct
71	{
72	struct cell *car;
73	struct cell *cdr;
74	} cons;
75
76	} object;
77
78	unsigned int flag;
79	};
80
81	/* frequently accessed members are near the beginning, reducing codesize esp. on CISC */
82	struct scheme
83	{
84	/* NIL is the most commonly accessed value */
85	struct cell xNIL; /* special cell representing empty cell */
86
87	/* We use 4 registers. */
88	pointer args; /* register for arguments of function */
89	pointer envir; /* stack register for current environment */
90	pointer code; /* register for current code */
91	pointer dump; /* stack register for next evaluation */
92
93	struct cell xT; /* special cell representing #t */
94	struct cell xF; /* special cell representing #f */
95	struct cell xEOF_OBJ; /* special cell representing end-of-file object */
96	struct cell xsink; /* when mem. alloc. fails */
97
98	/* arrays for segments */
99	#ifndef CELL_SEGSIZE
100	# define CELL_SEGSIZE 128 /* # of cells in one segment */
101	#endif
102	#ifndef CELL_NSEGMENT
103	# define CELL_NSEGMENT 10 /* # of segments for cells */
104	#endif
105	char *alloc_seg[CELL_NSEGMENT];
106	pointer cell_seg[CELL_NSEGMENT];
107	int cell_segsize[CELL_NSEGMENT];
108	int last_cell_seg;
109
110	int interactive_repl; /* are we in an interactive REPL? */
111
112	pointer oblist; /* pointer to symbol table */
113	pointer global_env; /* pointer to global environment */
114	pointer c_nest; /* stack for nested calls from C */
115
116	/* global pointers to special symbols */
117	pointer LAMBDA; /* pointer to syntax lambda */
118	pointer QUOTE; /* pointer to syntax quote */
119
120	pointer QQUOTE; /* pointer to symbol quasiquote */
121	pointer UNQUOTE; /* pointer to symbol unquote */
122	pointer UNQUOTESP; /* pointer to symbol unquote-splicing */
123	pointer FEED_TO; /* => */
124	pointer COLON_HOOK; /* colon-hook */
125	pointer ERROR_HOOK; /* error-hook */
126	pointer SHARP_HOOK; /* sharp-hook */
127	pointer COMPILE_HOOK; /* compile-hook */
128
129	pointer free_cell; /* pointer to top of free cells */
130	long fcells; /* # of free cells */
131
132	/* return code */
133	int retcode;
134	int tracing;
135
136	pointer inport;
137	pointer outport;
138	pointer save_inport;
139	pointer loadport;
140
141	# define MAXFIL 64
142	port load_stack[MAXFIL]; /* Stack of open files for port -1 (LOADing) */
143	int nesting_stack[MAXFIL];
144	int file_i;
145	int nesting;
146
147	char gc_verbose; /* if gc_verbose is not zero, print gc status */
148	char no_memory; /* Whether mem. alloc. has failed */
149
150	# define LINESIZE 1024
151	char linebuff[LINESIZE];
152	# define STRBUFFSIZE 256
153	char strbuff[STRBUFFSIZE];
154
155	int tmpfp;
156	int tok;
157	int print_flag;
158	pointer value;
159	int op;
160
161	void ext_data; / For the benefit of foreign functions */
162	long gensym_cnt;
163
164	struct scheme_interface *vptr;
165	struct dump_stack_frame dump_base; / pointer to base of allocated dump stack */
166	int dump_size; /* number of frames allocated for dump stack */
167	};
168
169	/* operator code */
170	enum scheme_opcodes
171	{
172	# define OP_DEF(A,B,C,D,E,OP) OP,
173	# include "opdefines.h"
174	OP_MAXDEFINED
175	};
176
177	# define cons(a,b) xcons(SCHEME_A_ a,b,0)
178	# define immutable_cons(a,b) xcons(SCHEME_A_ a,b,1)
179
180	INTERFACE int is_string (pointer p);
181	INTERFACE char *string_value (pointer p);
182	INTERFACE int is_number (pointer p);
183	INTERFACE num nvalue (pointer p);
184	INTERFACE IVALUE ivalue (pointer p);
185	INTERFACE RVALUE rvalue (pointer p);
186	INTERFACE int is_integer (pointer p);
187	INTERFACE int is_real (pointer p);
188	INTERFACE int is_character (pointer p);
189	INTERFACE long charvalue (pointer p);
190	INTERFACE int is_vector (pointer p);
191
192	INTERFACE int is_port (pointer p);
193
194	INTERFACE int is_pair (pointer p);
195	INTERFACE pointer pair_car (pointer p);
196	INTERFACE pointer pair_cdr (pointer p);
197	INTERFACE void set_car (pointer p, pointer q);
198	INTERFACE void set_cdr (pointer p, pointer q);
199
200	INTERFACE int is_symbol (pointer p);
201	INTERFACE char *symname (pointer p);
202	INTERFACE int hasprop (pointer p);
203
204	INTERFACE int is_syntax (pointer p);
205	INTERFACE int is_proc (pointer p);
206	INTERFACE int is_foreign (pointer p);
207	INTERFACE char *syntaxname (pointer p);
208	INTERFACE int is_closure (pointer p);
209	# ifdef USE_MACRO
210	INTERFACE int is_macro (pointer p);
211	# endif
212	INTERFACE pointer closure_code (pointer p);
213	INTERFACE pointer closure_env (pointer p);
214
215	INTERFACE int is_continuation (pointer p);
216	INTERFACE int is_promise (pointer p);
217	INTERFACE int is_environment (pointer p);
218	INTERFACE int is_immutable (pointer p);
219	INTERFACE void setimmutable (pointer p);
220
221	# ifdef __cplusplus
222	}
223	# endif
224
225	#endif
226
227	/*
228	Local variables:
229	c-file-style: "k&r"
230	End:
231	*/