microscheme/scheme-private.h


/* scheme-private.h */

#ifndef SCHEME_PRIVATE_H
#define SCHEME_PRIVATE_H

#include "scheme.h"

#include <inttypes.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; /* need 11 bits */
};

/* 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:	1.2
Committed:	Wed Nov 25 10:01:39 2015 UTC (8 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+7 -5 lines
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	#include <inttypes.h>
10
11	/------------------ Ugly internals -----------------------------------/
12
13	/------------------ Of interest only to FFI users --------------------/
14
15	# ifdef __cplusplus
16	extern "C"
17	{
18	# endif
19
20	enum scheme_port_kind
21	{
22	port_free = 0,
23	port_file = 1,
24	port_string = 2,
25	port_srfi6 = 4,
26	port_input = 16,
27	port_output = 32,
28	port_saw_EOF = 64
29	};
30
31	typedef struct port
32	{
33	unsigned char kind;
34	int16_t unget;
35	union
36	{
37	struct
38	{
39	int file;
40	int closeit;
41	# if SHOW_ERROR_LINE
42	int curr_line;
43	char *filename;
44	# endif
45	} stdio;
46	struct
47	{
48	char *start;
49	char *past_the_end;
50	char *curr;
51	} string;
52	} rep;
53	} port;
54
55	/* cell structure */
56	struct cell
57	{
58	union
59	{
60	struct
61	{
62	char *svalue;
63	int length;
64	} string;
65
66	num number;
67
68	port *port;
69
70	foreign_func ff;
71
72	struct
73	{
74	struct cell *car;
75	struct cell *cdr;
76	} cons;
77
78	} object;
79
80	unsigned int flag; /* need 11 bits */
81	};
82
83	/* frequently accessed members are near the beginning, reducing codesize esp. on CISC */
84	struct scheme
85	{
86	/* NIL is the most commonly accessed value */
87	struct cell xNIL; /* special cell representing empty cell */
88
89	/* We use 4 registers. */
90	pointer args; /* register for arguments of function */
91	pointer envir; /* stack register for current environment */
92	pointer code; /* register for current code */
93	pointer dump; /* stack register for next evaluation */
94
95	struct cell xT; /* special cell representing #t */
96	struct cell xF; /* special cell representing #f */
97	struct cell xEOF_OBJ; /* special cell representing end-of-file object */
98	struct cell xsink; /* when mem. alloc. fails */
99
100	/* arrays for segments */
101	#ifndef CELL_SEGSIZE
102	# define CELL_SEGSIZE 128 /* # of cells in one segment */
103	#endif
104	#ifndef CELL_NSEGMENT
105	# define CELL_NSEGMENT 10 /* # of segments for cells */
106	#endif
107	char *alloc_seg[CELL_NSEGMENT];
108	pointer cell_seg[CELL_NSEGMENT];
109	int cell_segsize[CELL_NSEGMENT];
110	int last_cell_seg;
111
112	int interactive_repl; /* are we in an interactive REPL? */
113
114	pointer oblist; /* pointer to symbol table */
115	pointer global_env; /* pointer to global environment */
116	pointer c_nest; /* stack for nested calls from C */
117
118	/* global pointers to special symbols */
119	pointer LAMBDA; /* pointer to syntax lambda */
120	pointer QUOTE; /* pointer to syntax quote */
121
122	pointer QQUOTE; /* pointer to symbol quasiquote */
123	pointer UNQUOTE; /* pointer to symbol unquote */
124	pointer UNQUOTESP; /* pointer to symbol unquote-splicing */
125	pointer FEED_TO; /* => */
126	pointer COLON_HOOK; /* colon-hook */
127	pointer ERROR_HOOK; /* error-hook */
128	pointer SHARP_HOOK; /* sharp-hook */
129	pointer COMPILE_HOOK; /* compile-hook */
130
131	pointer free_cell; /* pointer to top of free cells */
132	long fcells; /* # of free cells */
133
134	/* return code */
135	int retcode;
136	int tracing;
137
138	pointer inport;
139	pointer outport;
140	pointer save_inport;
141	pointer loadport;
142
143	# define MAXFIL 64
144	port load_stack[MAXFIL]; /* Stack of open files for port -1 (LOADing) */
145	int nesting_stack[MAXFIL];
146	int file_i;
147	int nesting;
148
149	char gc_verbose; /* if gc_verbose is not zero, print gc status */
150	char no_memory; /* Whether mem. alloc. has failed */
151
152	# define LINESIZE 1024
153	char linebuff[LINESIZE];
154	# define STRBUFFSIZE 256
155	char strbuff[STRBUFFSIZE];
156
157	int tmpfp;
158	int tok;
159	int print_flag;
160	pointer value;
161	int op;
162
163	void ext_data; / For the benefit of foreign functions */
164	long gensym_cnt;
165
166	struct scheme_interface *vptr;
167	struct dump_stack_frame dump_base; / pointer to base of allocated dump stack */
168	int dump_size; /* number of frames allocated for dump stack */
169	};
170
171	/* operator code */
172	enum scheme_opcodes
173	{
174	# define OP_DEF(A,B,C,D,E,OP) OP,
175	# include "opdefines.h"
176	OP_MAXDEFINED
177	};
178
179	# define cons(a,b) xcons(SCHEME_A_ a,b,0)
180	# define immutable_cons(a,b) xcons(SCHEME_A_ a,b,1)
181
182	INTERFACE int is_string (pointer p);
183	INTERFACE char *string_value (pointer p);
184	INTERFACE int is_number (pointer p);
185	INTERFACE num nvalue (pointer p);
186	INTERFACE IVALUE ivalue (pointer p);
187	INTERFACE RVALUE rvalue (pointer p);
188	INTERFACE int is_integer (pointer p);
189	INTERFACE int is_real (pointer p);
190	INTERFACE int is_character (pointer p);
191	INTERFACE long charvalue (pointer p);
192	INTERFACE int is_vector (pointer p);
193
194	INTERFACE int is_port (pointer p);
195
196	INTERFACE int is_pair (pointer p);
197	INTERFACE pointer pair_car (pointer p);
198	INTERFACE pointer pair_cdr (pointer p);
199	INTERFACE void set_car (pointer p, pointer q);
200	INTERFACE void set_cdr (pointer p, pointer q);
201
202	INTERFACE int is_symbol (pointer p);
203	INTERFACE char *symname (pointer p);
204	INTERFACE int hasprop (pointer p);
205
206	INTERFACE int is_syntax (pointer p);
207	INTERFACE int is_proc (pointer p);
208	INTERFACE int is_foreign (pointer p);
209	INTERFACE char *syntaxname (pointer p);
210	INTERFACE int is_closure (pointer p);
211	# ifdef USE_MACRO
212	INTERFACE int is_macro (pointer p);
213	# endif
214	INTERFACE pointer closure_code (pointer p);
215	INTERFACE pointer closure_env (pointer p);
216
217	INTERFACE int is_continuation (pointer p);
218	INTERFACE int is_promise (pointer p);
219	INTERFACE int is_environment (pointer p);
220	INTERFACE int is_immutable (pointer p);
221	INTERFACE void setimmutable (pointer p);
222
223	#ifdef __cplusplus
224	}
225	#endif
226
227	#endif
228
229	/*
230	Local variables:
231	c-file-style: "k&r"
232	End:
233	*/