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;
      uint32_t length;
    } string;

    struct {
      struct cell **vvalue;
      uint32_t length;
    } vector;

    num number;

    port *port;

    foreign_func ff;

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

  } object;

  uint8_t 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:	1.3
Committed:	Wed Nov 25 10:30:34 2015 UTC (8 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+7 -4 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1
2			/* scheme-private.h */
3
4			#ifndef SCHEME_PRIVATE_H
5	root	1.2	#define SCHEME_PRIVATE_H
6	root	1.1
7	root	1.2	#include "scheme.h"
8
9	root	1.1	/------------------ 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	root	1.3	uint32_t length;
62	root	1.1	} string;
63
64	root	1.3	struct {
65			struct cell **vvalue;
66			uint32_t length;
67			} vector;
68
69	root	1.1	num number;
70
71			port *port;
72
73			foreign_func ff;
74
75			struct
76			{
77			struct cell *car;
78			struct cell *cdr;
79			} cons;
80
81			} object;
82
83	root	1.3	uint8_t flag;
84	root	1.1	};
85
86			/* frequently accessed members are near the beginning, reducing codesize esp. on CISC */
87			struct scheme
88			{
89			/* NIL is the most commonly accessed value */
90			struct cell xNIL; /* special cell representing empty cell */
91
92			/* We use 4 registers. */
93			pointer args; /* register for arguments of function */
94			pointer envir; /* stack register for current environment */
95			pointer code; /* register for current code */
96			pointer dump; /* stack register for next evaluation */
97
98			struct cell xT; /* special cell representing #t */
99			struct cell xF; /* special cell representing #f */
100			struct cell xEOF_OBJ; /* special cell representing end-of-file object */
101			struct cell xsink; /* when mem. alloc. fails */
102
103			/* arrays for segments */
104			#ifndef CELL_SEGSIZE
105			# define CELL_SEGSIZE 128 /* # of cells in one segment */
106			#endif
107			#ifndef CELL_NSEGMENT
108			# define CELL_NSEGMENT 10 /* # of segments for cells */
109			#endif
110			char *alloc_seg[CELL_NSEGMENT];
111			pointer cell_seg[CELL_NSEGMENT];
112			int cell_segsize[CELL_NSEGMENT];
113			int last_cell_seg;
114
115			int interactive_repl; /* are we in an interactive REPL? */
116
117			pointer oblist; /* pointer to symbol table */
118			pointer global_env; /* pointer to global environment */
119			pointer c_nest; /* stack for nested calls from C */
120
121			/* global pointers to special symbols */
122			pointer LAMBDA; /* pointer to syntax lambda */
123			pointer QUOTE; /* pointer to syntax quote */
124
125			pointer QQUOTE; /* pointer to symbol quasiquote */
126			pointer UNQUOTE; /* pointer to symbol unquote */
127			pointer UNQUOTESP; /* pointer to symbol unquote-splicing */
128			pointer FEED_TO; /* => */
129			pointer COLON_HOOK; /* colon-hook */
130			pointer ERROR_HOOK; /* error-hook */
131			pointer SHARP_HOOK; /* sharp-hook */
132			pointer COMPILE_HOOK; /* compile-hook */
133
134			pointer free_cell; /* pointer to top of free cells */
135			long fcells; /* # of free cells */
136
137			/* return code */
138			int retcode;
139			int tracing;
140
141			pointer inport;
142			pointer outport;
143			pointer save_inport;
144			pointer loadport;
145
146			# define MAXFIL 64
147			port load_stack[MAXFIL]; /* Stack of open files for port -1 (LOADing) */
148			int nesting_stack[MAXFIL];
149			int file_i;
150			int nesting;
151
152			char gc_verbose; /* if gc_verbose is not zero, print gc status */
153			char no_memory; /* Whether mem. alloc. has failed */
154
155			# define LINESIZE 1024
156			char linebuff[LINESIZE];
157			# define STRBUFFSIZE 256
158			char strbuff[STRBUFFSIZE];
159
160			int tmpfp;
161			int tok;
162			int print_flag;
163			pointer value;
164			int op;
165
166			void ext_data; / For the benefit of foreign functions */
167			long gensym_cnt;
168
169			struct scheme_interface *vptr;
170			struct dump_stack_frame dump_base; / pointer to base of allocated dump stack */
171			int dump_size; /* number of frames allocated for dump stack */
172			};
173
174			/* operator code */
175			enum scheme_opcodes
176			{
177			# define OP_DEF(A,B,C,D,E,OP) OP,
178			# include "opdefines.h"
179			OP_MAXDEFINED
180			};
181
182			# define cons(a,b) xcons(SCHEME_A_ a,b,0)
183			# define immutable_cons(a,b) xcons(SCHEME_A_ a,b,1)
184
185			INTERFACE int is_string (pointer p);
186			INTERFACE char *string_value (pointer p);
187			INTERFACE int is_number (pointer p);
188			INTERFACE num nvalue (pointer p);
189			INTERFACE IVALUE ivalue (pointer p);
190			INTERFACE RVALUE rvalue (pointer p);
191			INTERFACE int is_integer (pointer p);
192			INTERFACE int is_real (pointer p);
193			INTERFACE int is_character (pointer p);
194			INTERFACE long charvalue (pointer p);
195			INTERFACE int is_vector (pointer p);
196
197			INTERFACE int is_port (pointer p);
198
199			INTERFACE int is_pair (pointer p);
200			INTERFACE pointer pair_car (pointer p);
201			INTERFACE pointer pair_cdr (pointer p);
202			INTERFACE void set_car (pointer p, pointer q);
203			INTERFACE void set_cdr (pointer p, pointer q);
204
205			INTERFACE int is_symbol (pointer p);
206			INTERFACE char *symname (pointer p);
207			INTERFACE int hasprop (pointer p);
208
209			INTERFACE int is_syntax (pointer p);
210			INTERFACE int is_proc (pointer p);
211			INTERFACE int is_foreign (pointer p);
212			INTERFACE char *syntaxname (pointer p);
213			INTERFACE int is_closure (pointer p);
214			# ifdef USE_MACRO
215			INTERFACE int is_macro (pointer p);
216			# endif
217			INTERFACE pointer closure_code (pointer p);
218			INTERFACE pointer closure_env (pointer p);
219
220			INTERFACE int is_continuation (pointer p);
221			INTERFACE int is_promise (pointer p);
222			INTERFACE int is_environment (pointer p);
223			INTERFACE int is_immutable (pointer p);
224			INTERFACE void setimmutable (pointer p);
225
226	root	1.2	#ifdef __cplusplus
227	root	1.1	}
228	root	1.2	#endif
229	root	1.1
230			#endif
231
232			/*
233			Local variables:
234			c-file-style: "k&r"
235			End:
236			*/