source: abuse/trunk/src/lisp/lisp.h @ 499

Last change on this file since 499 was 499, checked in by Sam Hocevar, 11 years ago

lisp: implement LSymbol::EvalUserFunction? and ensure all local pointers
are protected against collection.

  • Property svn:keywords set to Id
File size: 6.8 KB
Line 
1/*
2 *  Abuse - dark 2D side-scrolling platform game
3 *  Copyright (c) 1995 Crack dot Com
4 *  Copyright (c) 2005-2011 Sam Hocevar <sam@hocevar.net>
5 *
6 *  This software was released into the Public Domain. As with most public
7 *  domain software, no warranty is made or implied by Crack dot Com or
8 *  Jonathan Clark.
9 */
10
11#ifndef __LISP_HPP_
12#define __LISP_HPP_
13
14#include <cstdlib>
15#include <stdint.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 LObject
49{
50    /* Factories */
51    static LObject *Compile(char const *&s);
52
53    /* Methods */
54    LObject *Eval();
55    void Print();
56
57    /* Members */
58    ltype type;
59};
60
61struct LObjectVar : LObject
62{
63    /* Factories */
64    static LObjectVar *Create(int index);
65
66    /* Members */
67    int index;
68};
69
70struct LList : LObject
71{
72    /* Factories */
73    static LList *Create();
74
75    /* Methods */
76    size_t GetLength();
77
78    /* Members */
79    LObject *cdr, *car;
80};
81
82struct LNumber : LObject
83{
84    /* Factories */
85    static LNumber *Create(long num);
86
87    /* Members */
88    long num;
89};
90
91struct LRedirect : LObject
92{
93    /* Members */
94    LObject *ref;
95};
96
97struct LString : LObject
98{
99    /* Factories */
100    static LString *Create(char const *string);
101    static LString *Create(char const *string, int length);
102    static LString *Create(int length);
103
104    /* Methods */
105    char *GetString();
106
107    /* Members */
108private:
109    char str[1]; /* Can be allocated much larger than 1 */
110};
111
112struct LSymbol : LObject
113{
114    /* Factories */
115    static LSymbol *Find(char const *name);
116    static LSymbol *FindOrCreate(char const *name);
117
118    /* Methods */
119    LObject *EvalFunction(void *arg_list);
120    LObject *EvalUserFunction(LList *arg_list);
121
122    LString *GetName();
123    LObject *GetFunction();
124    LObject *GetValue();
125
126    void SetFunction(LObject *fun);
127    void SetValue(LObject *value);
128    void SetNumber(long num);
129
130    /* Members */
131#ifdef L_PROFILE
132    float time_taken;
133#endif
134    LObject *value;
135    LObject *function;
136    LString *name;
137    LSymbol *left, *right; // tree structure
138
139    /* Static members */
140    static LSymbol *root;
141    static size_t count;
142};
143
144struct LSysFunction : LObject
145{
146    /* Methods */
147    LObject *EvalFunction(LList *arg_list);
148
149    /* Members */
150    short min_args, max_args;
151    short fun_number;
152};
153
154struct LUserFunction : LObject
155{
156#ifndef NO_LIBS
157    intptr_t alist, blist;      // id for cached blocks
158#else
159    void *arg_list, *block_list;
160#endif
161};
162
163struct LArray : LObject
164{
165    /* Factories */
166    static LArray *Create(size_t len, void *rest);
167
168    /* Methods */
169    inline LObject **GetData() { return data; }
170    LObject *Get(int x);
171
172    /* Members */
173    size_t len;
174
175private:
176    LObject *data[1]; /* Can be allocated much larger than 1 */
177};
178
179struct LChar : LObject
180{
181    /* Factories */
182    static LChar *Create(uint16_t ch);
183
184    /* Members */
185    uint16_t ch;
186};
187
188struct LPointer : LObject
189{
190    /* Factories */
191    static LPointer *Create(void *addr);
192
193    /* Members */
194    void *addr;
195};
196
197struct LFixedPoint : LObject
198{
199    /* Factories */
200    static LFixedPoint *Create(int32_t x);
201
202    /* Members */
203    int32_t x;
204};
205
206static inline LObject *&CAR(void *x) { return ((LList *)x)->car; }
207static inline LObject *&CDR(void *x) { return ((LList *)x)->cdr; }
208static inline ltype item_type(void *x) { if (x) return *(ltype *)x; return L_CONS_CELL; }
209
210void perm_space();
211void tmp_space();
212void use_user_space(void *addr, long size);
213void *lpointer_value(void *lpointer);
214int32_t lnumber_value(void *lnumber);
215unsigned short lcharacter_value(void *c);
216long lfixed_point_value(void *c);
217void *lisp_atom(void *i);
218LObject *lcdr(void *c);
219LObject *lcar(void *c);
220void *lisp_eq(void *n1, void *n2);
221void *lisp_equal(void *n1, void *n2);
222void *eval_block(void *list);
223void *assoc(void *item, void *list);
224void resize_tmp(int new_size);
225void resize_perm(int new_size);
226
227void push_onto_list(void *object, void *&list);
228LSymbol *add_c_object(void *symbol, int index);
229LSymbol *add_c_function(char const *name, short min_args, short max_args, short number);
230LSymbol *add_c_bool_fun(char const *name, short min_args, short max_args, short number);
231LSymbol *add_lisp_function(char const *name, short min_args, short max_args, short number);
232int read_ltoken(char *&s, char *buffer);
233void print_trace_stack(int max_levels);
234
235
236LSysFunction *new_lisp_sys_function(int min_args, int max_args, int fun_number);
237LSysFunction *new_lisp_c_function(int min_args, int max_args, int fun_number);
238LSysFunction *new_lisp_c_bool(int min_args, int max_args, int fun_number);
239
240#ifdef NO_LIBS
241LUserFunction *new_lisp_user_function(void *arg_list, void *block_list);
242#else
243LUserFunction *new_lisp_user_function(intptr_t arg_list, intptr_t block_list);
244#endif
245
246LSysFunction *new_user_lisp_function(int min_args, int max_args, int fun_number);
247
248int end_of_program(char *s);
249void clear_tmp();
250void lisp_init(long perm_size, long tmp_size);
251void lisp_uninit();
252
253extern uint8_t *space[4], *free_space[4];
254extern int space_size[4];
255void *nth(int num, void *list);
256int32_t lisp_atan2(int32_t dy, int32_t dx);
257int32_t lisp_sin(int32_t x);
258int32_t lisp_cos(int32_t x);
259void restore_heap(void *val, int heap);
260void *mark_heap(int heap);
261
262extern "C" {
263void lbreak(const char *format, ...);
264} ;
265
266extern void clisp_init();                      // external initalizer call by lisp_init()
267extern long c_caller(long number, void *arg);  // exten c function switches on number
268extern void *l_caller(long number, void *arg);  // exten lisp function switches on number
269
270extern void *l_obj_get(long number);  // exten lisp function switches on number
271extern void l_obj_set(long number, void *arg);  // exten lisp function switches on number
272extern void l_obj_print(long number);  // exten lisp function switches on number
273
274// FIXME: get rid of this later
275static inline void *symbol_value(void *sym) { return ((LSymbol *)sym)->GetValue(); }
276static inline char *lstring_value(void *str) { return ((LString *)str)->GetString(); }
277
278#include "lisp_opt.h"
279
280#endif
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