2 Copyright (C) 1996-1997 Id Software, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 See the GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 This is a try to make the vm more generic, it is mainly based on the progs.h file.
22 For the license refer to progs.h.
24 Generic means, less as possible hard-coded links with the other parts of the engine.
25 This means no edict_engineprivate struct usage, etc.
26 The code uses void pointers instead.
32 #include "pr_comp.h" // defs shared with qcc
33 //#include "progdefs.h" // generated by program cdefs
36 typedef union vm_eval_s
47 typedef struct vm_link_s
50 struct link_s *prev, *next;
53 #define ENTITYGRIDAREAS 16
55 typedef struct vm_edict_engineprivate_s
57 // true if this edict is unused
59 // sv.time when the object was freed (to prevent early reuse which could
60 // mess up client interpolation or obscure severe QuakeC bugs)
63 // physics grid areas this edict is linked into
64 link_t areagrid[ENTITYGRIDAREAS];
65 // since the areagrid can have multiple references to one entity,
66 // we should avoid extensive checking on entities already encountered
67 int areagridmarknumber;
69 // old entity protocol, not used
72 entity_state_t baseline;
73 // LordHavoc: previous frame
74 entity_state_t deltabaseline;
77 // LordHavoc: gross hack to make floating items still work
78 int suspendedinairflag;
79 // used by PushMove to keep track of where objects were before they were
80 // moved, in case they need to be moved back
82 vec3_t moved_fromangles;
84 vm_edict_engineprivate_t;
86 // the entire server entity structure
87 // NOTE: keep this small! priv and v are dynamic but this struct is not!
88 typedef struct vm_edict_s
90 // engine-private fields (stored in dynamically resized array)
91 edict_engineprivate_t *e;
92 // QuakeC fields (stored in dynamically resized array)
98 /*// LordHavoc: in an effort to eliminate time wasted on GetEdictFieldValue... see pr_edict.c for the functions which use these.
99 extern int eval_gravity;
100 extern int eval_button3;
101 extern int eval_button4;
102 extern int eval_button5;
103 extern int eval_button6;
104 extern int eval_button7;
105 extern int eval_button8;
106 extern int eval_glow_size;
107 extern int eval_glow_trail;
108 extern int eval_glow_color;
109 extern int eval_items2;
110 extern int eval_scale;
111 extern int eval_alpha;
112 extern int eval_renderamt; // HalfLife support
113 extern int eval_rendermode; // HalfLife support
114 extern int eval_fullbright;
115 extern int eval_ammo_shells1;
116 extern int eval_ammo_nails1;
117 extern int eval_ammo_lava_nails;
118 extern int eval_ammo_rockets1;
119 extern int eval_ammo_multi_rockets;
120 extern int eval_ammo_cells1;
121 extern int eval_ammo_plasma;
122 extern int eval_idealpitch;
123 extern int eval_pitch_speed;
124 extern int eval_viewmodelforclient;
125 extern int eval_nodrawtoclient;
126 extern int eval_exteriormodeltoclient;
127 extern int eval_drawonlytoclient;
128 extern int eval_ping;
129 extern int eval_movement;
130 extern int eval_pmodel;
131 extern int eval_punchvector;
132 extern int eval_viewzoom;
133 extern int eval_clientcolors;
134 extern int eval_tag_entity;
135 extern int eval_tag_index;*/
137 typedef struct prvm_stack_s
144 typedef union prvm_eval_s
155 /*typedef struct prvm_link_s
158 struct link_s *prev, *next;
161 // AK: I dont call it engine private cause it doesnt really belongs to the engine
162 // it belongs to prvm.
163 typedef struct prvm_edict_private_s
167 } prvm_edict_private_t;
169 typedef struct prvm_edict_s
171 // engine-private fields (stored in dynamically resized array)
172 //edict_engineprivate_t *e;
175 prvm_edict_private_t *e;
177 // add other private structs as you desire
178 // new structs have to start with the elements of prvm_edit_private_t
179 // e.g. a new struct has to either look like this:
180 // typedef struct server_edict_private_s {
181 // prvm_edict_private_t base;
182 // vec3_t moved_from;
183 // vec3_t moved_fromangles;
184 // ... } server_edict_private_t;
186 // typedef struct server_edict_private_s {
189 // vec3_t moved_from;
190 // vec3_t moved_fromangles;
191 // ... } server_edict_private_t;
192 // However, the first one should be preferred.
194 // QuakeC fields (stored in dynamically resized array)
199 #define PRVM_GETEDICTFIELDVALUE(ed, fieldoffset) (fieldoffset ? (prvm_eval_t *)((qbyte *)ed->v + fieldoffset) : NULL)
201 /*// this struct is the basic requirement for a qc prog
202 typedef struct prvm_pr_globalvars_s
205 } prvm_pr_globalvars_t;
208 extern mfunction_t *SV_PlayerPhysicsQC;
209 extern mfunction_t *EndFrameQC;
210 //KrimZon - SERVER COMMANDS IN QUAKEC
211 extern mfunction_t *SV_ParseClientCommandQC;
213 //============================================================================
215 typedef struct prvm_builtin_mem_s
218 void (*deinit)(void);
221 } prvm_builtin_mem_t;
224 //============================================================================
226 #define PRVM_FE_NEXTHINK 2
227 #define PRVM_FE_THINK 4
228 #define PRVM_FE_FRAME 8
230 #define PRVM_FE_CLASSNAME 8
231 #define PRVM_FE_CHAIN 4
232 #define PRVM_OP_STATE 1
234 #define PRVM_MAX_STACK_DEPTH 256
235 #define PRVM_LOCALSTACK_SIZE 2048
237 typedef void (*prvm_builtin_t) (void);
239 // [INIT] variables flagged with this token can be initialized by 'you'
240 // NOTE: external code has to create and free the mempools but everything else is done by prvm !
241 typedef struct vm_prog_s
244 mfunction_t *functions;
249 dstatement_t *statements;
250 //prvm_pr_globalvars_t*pr_global_struct;
251 float *globals; // same as pr_global_struct
252 int edict_size; // in bytes
253 int edictareasize; // LordHavoc: in bytes (for bound checking)
257 const char **knownstrings;
259 // all memory allocations related to this vm_prog (code, edicts, strings)
260 mempool_t *progs_mempool; // [INIT]
262 prvm_builtin_t *builtins; // [INIT]
263 int numbuiltins; // [INIT]
268 mfunction_t *xfunction;
271 // stacktrace writes into stack[MAX_STACK_DEPTH]
272 // thus increase the array, so depth wont be overwritten
273 prvm_stack_t stack[PRVM_MAX_STACK_DEPTH+1];
276 int localstack[PRVM_LOCALSTACK_SIZE];
279 unsigned short crc; // [INIT]
281 //============================================================================
282 // until this point everything also exists (with the pr_ prefix) in the old vm
284 // copies of some vars that were former read from sv
288 prvm_edict_t *edicts;
292 // size of the engine private struct
293 int edictprivate_size; // [INIT]
295 // has to be updated every frame - so the vm time is up-to-date
296 // AK changed so time will point to the time field (if there is one) else it points to _time
297 // actually should be double, but qc doesnt support it
301 // name of the prog, e.g. "Server", "Client" or "Menu" (used for text output)
302 char *name; // [INIT]
304 // flag - used to store general flags like PRVM_GE_SELF, etc.
307 char *extensionstring; // [INIT]
309 // used to indicate whether a prog is loaded
312 // used instead of the constant MAX_EDICTS
313 int limit_edicts; // [INIT]
315 // prvm_builtin_mem_t *mem_list;
317 // now passes as parameter of PRVM_LoadProgs
318 // char **required_func;
319 // int numrequiredfunc;
321 //============================================================================
323 ddef_t *self; // if self != 0 then there is a global self
325 //============================================================================
328 void (*begin_increase_edicts)(void); // [INIT] used by PRVM_MEM_Increase_Edicts
329 void (*end_increase_edicts)(void); // [INIT]
331 void (*init_edict)(int num); // [INIT] used by PRVM_ED_ClearEdict
332 void (*free_edict)(prvm_edict_t *ed); // [INIT] used by PRVM_ED_Free
334 void (*count_edicts)(void); // [INIT] used by PRVM_ED_Count_f
336 qboolean (*load_edict)(prvm_edict_t *ent); // [INIT] used by PRVM_ED_LoadFromFile
338 void (*init_cmd)(void); // [INIT] used by PRVM_InitProg
339 void (*reset_cmd)(void); // [INIT] used by PRVM_ResetProg
341 void (*error_cmd)(void); // [INIT]
346 extern prvm_prog_t * prog;
348 #define PRVM_MAXPROGS 3
349 #define PRVM_SERVERPROG 0 // actually not used at the moment
350 #define PRVM_CLIENTPROG 1
351 #define PRVM_MENUPROG 2
353 extern prvm_prog_t prvm_prog_list[PRVM_MAXPROGS];
355 //============================================================================
358 extern prvm_builtin_t vm_sv_builtins[];
359 extern prvm_builtin_t vm_cl_builtins[];
360 extern prvm_builtin_t vm_m_builtins[];
362 extern const int vm_sv_numbuiltins;
363 extern const int vm_cl_numbuiltins;
364 extern const int vm_m_numbuiltins;
366 extern char * vm_sv_extensions;
367 extern char * vm_cl_extensions;
368 extern char * vm_m_extensions;
370 void VM_SV_Cmd_Init(void);
371 void VM_SV_Cmd_Reset(void);
373 void VM_CL_Cmd_Init(void);
374 void VM_CL_Cmd_Reset(void);
376 void VM_M_Cmd_Init(void);
377 void VM_M_Cmd_Reset(void);
379 void VM_Cmd_Init(void);
380 void VM_Cmd_Reset(void);
381 //============================================================================
383 void PRVM_Init (void);
385 void PRVM_ExecuteProgram (func_t fnum, const char *errormessage);
386 void PRVM_LoadProgs (const char *filename, int numrequiredfunc, char **required_func);
388 #define PRVM_Alloc(buffersize) _PRVM_Alloc(buffersize, __FILE__, __LINE__)
389 #define PRVM_Free(buffer) _PRVM_Free(buffer, __FILE__, __LINE__)
390 #define PRVM_FreeAll() _PRVM_FreeAll(__FILE__, __LINE__)
391 void *_PRVM_Alloc (size_t buffersize, const char *filename, int fileline);
392 void _PRVM_Free (void *buffer, const char *filename, int fileline);
393 void _PRVM_FreeAll (const char *filename, int fileline);
395 void PRVM_Profile_f (void);
397 void PRVM_PrintState(void);
398 void PRVM_CrashAll (void);
399 void PRVM_Crash (void);
401 prvm_edict_t *PRVM_ED_Alloc (void);
402 void PRVM_ED_Free (prvm_edict_t *ed);
403 void PRVM_ED_ClearEdict (prvm_edict_t *e);
405 void PRVM_ED_Print(prvm_edict_t *ed);
406 void PRVM_ED_Write (qfile_t *f, prvm_edict_t *ed);
407 const char *PRVM_ED_ParseEdict (const char *data, prvm_edict_t *ent);
409 void PRVM_ED_WriteGlobals (qfile_t *f);
410 void PRVM_ED_ParseGlobals (const char *data);
412 void PRVM_ED_LoadFromFile (const char *data);
414 prvm_edict_t *PRVM_EDICT_NUM_ERROR(int n, char *filename, int fileline);
415 #define PRVM_EDICT_NUM(n) (((n) >= 0 && (n) < prog->max_edicts) ? prog->edicts + (n) : PRVM_EDICT_NUM_ERROR(n, __FILE__, __LINE__))
417 //int NUM_FOR_EDICT_ERROR(edict_t *e);
418 #define PRVM_NUM_FOR_EDICT(e) ((int)((prvm_edict_t *)(e) - prog->edicts))
419 //int NUM_FOR_EDICT(edict_t *e);
421 #define PRVM_NEXT_EDICT(e) ((e) + 1)
423 #define PRVM_EDICT_TO_PROG(e) (PRVM_NUM_FOR_EDICT(e))
424 //int PRVM_EDICT_TO_PROG(edict_t *e);
425 #define PRVM_PROG_TO_EDICT(n) (PRVM_EDICT_NUM(n))
426 //edict_t *PRVM_PROG_TO_EDICT(int n);
428 //============================================================================
430 #define PRVM_G_FLOAT(o) (prog->globals[o])
431 #define PRVM_G_INT(o) (*(int *)&prog->globals[o])
432 #define PRVM_G_EDICT(o) (PRVM_PROG_TO_EDICT(*(int *)&prog->globals[o]))
433 #define PRVM_G_EDICTNUM(o) PRVM_NUM_FOR_EDICT(PRVM_G_EDICT(o))
434 #define PRVM_G_VECTOR(o) (&prog->globals[o])
435 #define PRVM_G_STRING(o) (PRVM_GetString(*(string_t *)&prog->globals[o]))
436 //#define PRVM_G_FUNCTION(o) (*(func_t *)&prog->globals[o])
438 // FIXME: make these go away?
439 #define PRVM_E_FLOAT(e,o) (((float*)e->v)[o])
440 #define PRVM_E_INT(e,o) (((int*)e->v)[o])
441 //#define PRVM_E_VECTOR(e,o) (&((float*)e->v)[o])
442 #define PRVM_E_STRING(e,o) (PRVM_GetString(*(string_t *)&((float*)e->v)[o]))
444 extern int prvm_type_size[8]; // for consistency : I think a goal of this sub-project is to
445 // make the new vm mostly independent from the old one, thus if it's necessary, I copy everything
447 void PRVM_Init_Exec(void);
449 void PRVM_ED_PrintEdicts_f (void);
450 void PRVM_ED_PrintNum (int ent);
452 const char *PRVM_GetString(int num);
453 int PRVM_SetQCString(const char *s);
454 int PRVM_SetEngineString(const char *s);
455 char *PRVM_AllocString(int bufferlength);
456 void PRVM_FreeString(char *s);
458 //============================================================================
460 // used as replacement for a prog stack
461 //#define PRVM_DEBUGPRSTACK
463 #ifdef PRVM_DEBUGPRSTACK
464 #define PRVM_Begin if(prog != 0) Con_Printf("prog not 0(prog = %i) in file: %s line: %i!\n", PRVM_GetProgNr(), __FILE__, __LINE__)
465 #define PRVM_End prog = 0
468 #define PRVM_End prog = 0
472 //#define PRVM_SAFENAME
473 #ifndef PRVM_SAFENAME
474 #define PRVM_NAME (prog->name)
476 #define PRVM_NAME (prog->name ? prog->name : "Unknown prog name")
479 // helper macro to make function pointer calls easier
480 #define PRVM_GCALL(func) if(prog->func) prog->func
482 #define PRVM_ERROR Host_Error
484 // other prog handling functions
485 qboolean PRVM_SetProgFromString(const char *str);
486 void PRVM_SetProg(int prognr);
488 void PRVM_InitProg(int prognr);
489 void PRVM_ResetProg(void);
491 qboolean PRVM_ProgLoaded(int prognr);
493 int PRVM_GetProgNr(void);
496 // TODO: fill in the params
497 //void PRVM_Create();