source: abuse/trunk/src/lisp/lisp.h @ 484

Last change on this file since 484 was 484, checked in by Sam Hocevar, 11 years ago

lisp: populate LispSymbol? with symbol-related methods.

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1/*
2 *  Abuse - dark 2D side-scrolling platform game
3 *  Copyright (c) 1995 Crack dot Com
4 *
5 *  This software was released into the Public Domain. As with most public
6 *  domain software, no warranty is made or implied by Crack dot Com or
7 *  Jonathan Clark.
8 */
9
10#ifndef __LISP_HPP_
11#define __LISP_HPP_
12
13#include <stdint.h>
14
15#include "lisp_opt.h"
16
17#ifdef L_PROFILE
18#include "timing.h"
19#endif
20
21#define Cell void
22#define MAX_LISP_TOKEN_LEN 200
23enum { PERM_SPACE,
24       TMP_SPACE,
25       USER_SPACE,
26       GC_SPACE };
27
28#define FIXED_TRIG_SIZE 360               // 360 degrees stored in table
29extern int32_t sin_table[FIXED_TRIG_SIZE];   // this should be filled in by external module
30#define TBS 1662                          // atan table granularity
31extern uint16_t atan_table[TBS];
32#define NILP(x) (x==NULL)
33#define DEFINEDP(x) (x!=l_undefined)
34class bFILE;
35extern int current_space;
36extern bFILE *current_print_file;
37
38
39enum { L_BAD_CELL,   // error catching type
40       L_CONS_CELL, L_NUMBER, L_SYMBOL,     L_SYS_FUNCTION, L_USER_FUNCTION,
41       L_STRING, L_CHARACTER, L_C_FUNCTION, L_C_BOOL,       L_L_FUNCTION, L_POINTER,
42       L_OBJECT_VAR, L_1D_ARRAY,
43       L_FIXED_POINT, L_COLLECTED_OBJECT };
44
45typedef uint32_t ltype;    // make sure structures aren't packed differently on various compiler
46                       // and sure that word, etc are word aligned
47
48struct LispObject
49{
50    ltype type;
51};
52
53struct LispObjectVar : LispObject
54{
55    long number;
56};
57
58struct LispList : LispObject
59{
60    void *cdr, *car;
61};
62
63struct LispNumber : LispObject
64{
65    long num;
66};
67
68struct LispRedirect : LispObject
69{
70    void *new_reference;
71};
72
73struct LispString : LispObject
74{
75};
76
77struct LispSymbol : LispObject
78{
79    static LispSymbol *Find(char const *name);
80    static LispSymbol *FindOrCreate(char const *name);
81
82    void *GetName();
83    void *GetFunction();
84    void *GetValue();
85
86    void SetFunction(void *fun);
87    void *SetValue(void *value);
88    void *SetNumber(long num);
89
90#ifdef L_PROFILE
91    float time_taken;
92#endif
93    void *value, *function;
94    LispString *name;
95    LispSymbol *left, *right; // tree structure
96};
97
98struct LispSysFunction : LispObject
99{
100    short min_args, max_args;
101    short fun_number;
102};
103
104struct LispUserFunction : LispObject
105{
106#ifndef NO_LIBS
107    intptr_t alist, blist;      // id for cached blocks
108#else
109    void *arg_list, *block_list;
110#endif
111};
112
113struct LispArray : LispObject
114{
115    static LispArray *Create(int size, void *rest);
116
117    inline LispObject **GetData() { return data; }
118    LispObject *Get(long x);
119
120    unsigned short size;
121    // size * sizeof (void *) follows1
122
123private:
124    LispObject *data[1];
125};
126
127struct LispChar : LispObject
128{
129    int16_t pad;
130    uint16_t ch;
131};
132
133struct LispPointer : LispObject
134{
135    void *addr;
136};
137
138
139struct LispFixedPoint : LispObject
140{
141    int32_t x;
142};
143
144static inline void *&CAR(void *x) { return ((LispList *)x)->car; }
145static inline void *&CDR(void *x) { return ((LispList *)x)->cdr; }
146
147void perm_space();
148void tmp_space();
149void use_user_space(void *addr, long size);
150#define item_type(c) ((c) ? *((ltype *)c) : (ltype)L_CONS_CELL)
151void *lpointer_value(void *lpointer);
152int32_t lnumber_value(void *lnumber);
153char *lstring_value(void *lstring);
154unsigned short lcharacter_value(void *c);
155long lfixed_point_value(void *c);
156void *lisp_atom(void *i);
157void *lcdr(void *c);
158void *lcar(void *c);
159void *lisp_eq(void *n1, void *n2);
160void *lisp_equal(void *n1, void *n2);
161long list_length(void *i);
162void lprint(void *i);
163void *eval(void *prog);
164void *eval_block(void *list);
165void *eval_function(LispSymbol *sym, void *arg_list);
166void *eval_user_fun(LispSymbol *sym, void *arg_list);
167void *compile(char const *&s);
168void *assoc(void *item, void *list);
169void resize_tmp(int new_size);
170void resize_perm(int new_size);
171
172void push_onto_list(void *object, void *&list);
173LispSymbol *add_c_object(void *symbol, int16_t number);
174LispSymbol *add_c_function(char const *name, short min_args, short max_args, short number);
175LispSymbol *add_c_bool_fun(char const *name, short min_args, short max_args, short number);
176LispSymbol *add_lisp_function(char const *name, short min_args, short max_args, short number);
177int read_ltoken(char *&s, char *buffer);
178LispList *new_cons_cell();
179void print_trace_stack(int max_levels);
180
181
182LispNumber *new_lisp_number(long num);
183LispPointer *new_lisp_pointer(void *addr);
184LispChar *new_lisp_character(uint16_t ch);
185LispString *new_lisp_string(char const *string);
186LispString *new_lisp_string(char const *string, int length);
187LispString *new_lisp_string(int length);
188LispFixedPoint *new_lisp_fixed_point(int32_t x);
189LispObjectVar *new_lisp_object_var(int16_t number);
190LispSysFunction *new_lisp_sys_function(int min_args, int max_args, int fun_number);
191LispSysFunction *new_lisp_c_function(int min_args, int max_args, int fun_number);
192LispSysFunction *new_lisp_c_bool(int min_args, int max_args, int fun_number);
193
194#ifdef NO_LIBS
195LispUserFunction *new_lisp_user_function(void *arg_list, void *block_list);
196#else
197LispUserFunction *new_lisp_user_function(intptr_t arg_list, intptr_t block_list);
198#endif
199
200LispSysFunction *new_user_lisp_function(int min_args, int max_args, int fun_number);
201
202int end_of_program(char *s);
203void clear_tmp();
204void lisp_init(long perm_size, long tmp_size);
205void lisp_uninit();
206extern LispSymbol *lsym_root;
207
208extern uint8_t *space[4], *free_space[4];
209extern int space_size[4];
210void *nth(int num, void *list);
211int32_t lisp_atan2(int32_t dy, int32_t dx);
212int32_t lisp_sin(int32_t x);
213int32_t lisp_cos(int32_t x);
214void restore_heap(void *val, int heap);
215void *mark_heap(int heap);
216
217extern "C" {
218void lbreak(const char *format, ...);
219} ;
220
221extern void clisp_init();                      // external initalizer call by lisp_init()
222extern long c_caller(long number, void *arg);  // exten c function switches on number
223extern void *l_caller(long number, void *arg);  // exten lisp function switches on number
224
225extern void *l_obj_get(long number);  // exten lisp function switches on number
226extern void l_obj_set(long number, void *arg);  // exten lisp function switches on number
227extern void l_obj_print(long number);  // exten lisp function switches on number
228
229// FIXME: get rid of this later
230static inline void *symbol_value(void *sym) { return ((LispSymbol *)sym)->GetValue(); }
231
232
233
234#endif
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