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spingle/source/pr_edict.c

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/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2009 John Fitzgibbons and others
Copyright (C) 2010-2014 QuakeSpasm developers
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// sv_edict.c -- entity dictionary
#include "q_defs.h"
dprograms_t progs;
dfunction_t *pr_functions;
dstatement_t *pr_statements;
byte *pr_global_data;
ddef_t *pr_fielddefs;
int32_t pr_edict_size; // in bytes
bool pr_alpha_supported; //johnfitz
uint16_t pr_crc;
static int32_t type_size[] =
{
[ev_void] = 1,
[ev_string] = 1,
[ev_float] = 1,
[ev_vector] = 3,
[ev_entity] = 1,
[ev_field] = 1,
[ev_function] = 1,
[ev_pointer] = 1,
};
#define MAX_FIELD_LEN 64
#define GEFV_CACHESIZE 2
typedef struct
{
ddef_t *pcache;
char field[MAX_FIELD_LEN];
} gefv_cache;
static gefv_cache gefvCache[GEFV_CACHESIZE] =
{
{ NULL, "" },
{ NULL, "" }
};
/*
=================
ED_ClearEdict
Sets everything to NULL
=================
*/
void ED_ClearEdict(edict_t *e)
{
memset(e->fields, 0, progs.entityfields * 4);
e->free = false;
}
/*
=================
ED_Alloc
Either finds a free edict, or allocates a new one.
Try to avoid reusing an entity that was recently freed, because it
can cause the client to think the entity morphed into something else
instead of being removed and recreated, which can cause interpolated
angles and bad trails.
=================
*/
edict_t *ED_Alloc(void)
{
int32_t i;
edict_t *e;
for(i = svs.maxclients + 1; i < sv.num_edicts; i++)
{
e = EdictNum(i);
// the first couple seconds of server time can involve a lot of
// freeing and allocating, so relax the replacement policy
if(e->free && (e->freetime < 2 || sv.time - e->freetime > 0.5))
{
ED_ClearEdict(e);
return e;
}
}
if(i == sv.max_edicts) //johnfitz -- use sv.max_edicts instead of MAX_EDICTS
Host_Error("ED_Alloc: no free edicts (max_edicts is %" PRIi32 ")", sv.max_edicts);
sv.num_edicts++;
e = EdictNum(i);
memset(e, 0, pr_edict_size); // ericw -- switched sv.edicts to malloc(), so we are accessing uninitialized memory and must fully zero it, not just ED_ClearEdict
return e;
}
/*
=================
ED_Free
Marks the edict as free
FIXME: walk all entities and NULL out references to this entity
=================
*/
void ED_Free(edict_t *ed)
{
SV_UnlinkEdict(ed); // unlink from world bsp
ed->free = true;
ED_RString(ed, ED_model) = 0;
ED_Float(ed, ED_takedamage) = 0;
ED_Float(ed, ED_modelindex) = 0;
ED_Float(ed, ED_colormap) = 0;
ED_Float(ed, ED_skin) = 0;
ED_Float(ed, ED_frame) = 0;
VectorCopy(vec3_origin, ED_Vector(ed, ED_origin));
VectorCopy(vec3_origin, ED_Vector(ed, ED_angles));
ED_Float(ed, ED_nextthink) = -1;
ED_Float(ed, ED_solid) = 0;
ed->alpha = ENTALPHA_DEFAULT; //johnfitz -- reset alpha for next entity
ed->freetime = sv.time;
}
//===========================================================================
/*
============
ED_GlobalAtOfs
============
*/
ddef_t *ED_GlobalAtOfs(int32_t ofs)
{
ddef_t *def;
int32_t i;
for(i = 0; i < progs.numglobaldefs; i++)
{
def = &pr_globaldefs[i];
if(def->ofs == ofs)
return def;
}
return NULL;
}
/*
============
ED_FieldAtOfs
============
*/
ddef_t *ED_FieldAtOfs(int32_t ofs)
{
ddef_t *def;
int32_t i;
for(i = 0; i < progs.numfielddefs; i++)
{
def = &pr_fielddefs[i];
if(def->ofs == ofs)
return def;
}
return NULL;
}
/*
============
ED_FindField
============
*/
static ddef_t *ED_FindField(const char *name)
{
ddef_t *def;
int32_t i;
for(i = 0; i < progs.numfielddefs; i++)
{
def = &pr_fielddefs[i];
if(!strcmp(PR_GetString(def->s_name), name))
return def;
}
return NULL;
}
/*
============
ED_FindGlobal
============
*/
static ddef_t *ED_FindGlobal(const char *name)
{
ddef_t *def;
int32_t i;
for(i = 0; i < progs.numglobaldefs; i++)
{
def = &pr_globaldefs[i];
if(!strcmp(PR_GetString(def->s_name), name))
return def;
}
return NULL;
}
/*
============
ED_FindFunction
============
*/
static dfunction_t *ED_FindFunction(const char *fn_name)
{
dfunction_t *func;
int32_t i;
for(i = 0; i < progs.numfunctions; i++)
{
func = &pr_functions[i];
if(!strcmp(PR_GetString(func->s_name), fn_name))
return func;
}
return NULL;
}
/*
============
GetEdictFieldValue
============
*/
eval_t *GetEdictFieldValue(edict_t *ed, const char *field)
{
ddef_t *def = NULL;
int32_t i;
static int32_t rep = 0;
for(i = 0; i < GEFV_CACHESIZE; i++)
{
if(!strcmp(field, gefvCache[i].field))
{
def = gefvCache[i].pcache;
goto done;
}
}
def = ED_FindField(field);
if(strlen(field) < MAX_FIELD_LEN)
{
gefvCache[rep].pcache = def;
strcpy(gefvCache[rep].field, field);
rep ^= 1;
}
done:
if(!def)
return NULL;
return ED_Eval(ed, def->ofs);
}
/*
=============
ED_Print
For debugging
=============
*/
void ED_Print(edict_t *ed)
{
ddef_t *d;
int32_t *v;
int32_t i, j, l;
const char *name;
int32_t type;
if(ed->free)
{
Con_Printf("FREE\n");
return;
}
Con_SafePrintf("\nEDICT %" PRIi32 ":\n", NumForEdict(ed)); //johnfitz -- was Con_Printf
for(i = 1; i < progs.numfielddefs; i++)
{
d = &pr_fielddefs[i];
name = PR_GetString(d->s_name);
l = strlen(name);
if(l > 1 && name[l - 2] == '_')
continue; // skip _x, _y, _z vars
v = &ED_Int(ed, d->ofs);
// if the value is still all 0, skip the field
type = d->type & ~DEF_SAVEGLOBAL;
for(j = 0; j < type_size[type]; j++)
{
if(v[j])
break;
}
if(j == type_size[type])
continue;
Con_SafePrintf("%s", name); //johnfitz -- was Con_Printf
while(l++ < 15)
Con_SafePrintf(" "); //johnfitz -- was Con_Printf
Con_SafePrintf("%s\n", PR_ValueString(d->type, (eval_t *)v)); //johnfitz -- was Con_Printf
}
}
/*
=============
ED_Write
For savegames
=============
*/
void ED_Write(FILE *f, edict_t *ed)
{
ddef_t *d;
int32_t *v;
int32_t i, j;
const char *name;
int32_t type;
fprintf(f, "{\n");
if(ed->free)
{
fprintf(f, "}\n");
return;
}
for(i = 1; i < progs.numfielddefs; i++)
{
d = &pr_fielddefs[i];
name = PR_GetString(d->s_name);
j = strlen(name);
if(j > 1 && name[j - 2] == '_')
continue; // skip _x, _y, _z vars
v = &ED_Int(ed, d->ofs);
// if the value is still all 0, skip the field
type = d->type & ~DEF_SAVEGLOBAL;
for(j = 0; j < type_size[type]; j++)
{
if(v[j])
break;
}
if(j == type_size[type])
continue;
fprintf(f, "\"%s\" ", name);
fprintf(f, "\"%s\"\n", PR_UglyValueString(d->type, (eval_t *)v));
}
//johnfitz -- save entity alpha manually when program doesn't know about alpha
if(!pr_alpha_supported && ed->alpha != ENTALPHA_DEFAULT)
fprintf(f, "\"alpha\" \"%f\"\n", ENTALPHA_TOSAVE(ed->alpha));
//johnfitz
fprintf(f, "}\n");
}
void ED_PrintNum(int32_t ent)
{
ED_Print(EdictNum(ent));
}
/*
=============
ED_PrintEdicts
For debugging, prints all the entities in the current server
=============
*/
void ED_PrintEdicts(void)
{
int32_t i;
if(!sv.active)
return;
Con_Printf("%" PRIi32 " entities\n", sv.num_edicts);
for(i = 0; i < sv.num_edicts; i++)
ED_PrintNum(i);
}
/*
=============
ED_PrintEdict_f
For debugging, prints a single edicy
=============
*/
static void ED_PrintEdict_f(void)
{
int32_t i;
if(!sv.active)
return;
i = atoi(Cmd_Argv(1));
if(i < 0 || i >= sv.num_edicts)
{
Con_Printf("Bad edict number\n");
return;
}
ED_PrintNum(i);
}
/*
=============
ED_Count
For debugging
=============
*/
static void ED_Count(void)
{
edict_t *ent;
int32_t i, active, models, solid, step;
if(!sv.active)
return;
active = models = solid = step = 0;
for(i = 0; i < sv.num_edicts; i++)
{
ent = EdictNum(i);
if(ent->free)
continue;
active++;
if(ED_Float(ent, ED_solid))
solid++;
if(ED_RString(ent, ED_model))
models++;
if(ED_Float(ent, ED_movetype) == MOVETYPE_STEP)
step++;
}
Con_Printf("num_edicts:%3" PRIi32 "\n", sv.num_edicts);
Con_Printf("active :%3" PRIi32 "\n", active);
Con_Printf("view :%3" PRIi32 "\n", models);
Con_Printf("touch :%3" PRIi32 "\n", solid);
Con_Printf("step :%3" PRIi32 "\n", step);
}
/*
==============================================================================
ARCHIVING GLOBALS
FIXME: need to tag constants, doesn't really work
==============================================================================
*/
/*
=============
ED_WriteGlobals
=============
*/
void ED_WriteGlobals(FILE *f)
{
ddef_t *def;
int32_t i;
const char *name;
int32_t type;
fprintf(f, "{\n");
for(i = 0; i < progs.numglobaldefs; i++)
{
def = &pr_globaldefs[i];
type = def->type;
if(!(def->type & DEF_SAVEGLOBAL))
continue;
type &= ~DEF_SAVEGLOBAL;
if(type != ev_string && type != ev_float && type != ev_entity)
continue;
name = PR_GetString(def->s_name);
fprintf(f, "\"%s\" ", name);
fprintf(f, "\"%s\"\n", PR_UglyValueString(type, G_Eval(def->ofs)));
}
fprintf(f, "}\n");
}
/*
=============
ED_ParseGlobals
=============
*/
const char *ED_ParseGlobals(const char *data)
{
char keyname[64];
ddef_t *key;
while(1)
{
// parse key
data = COM_Parse(data);
if(com_token[0] == '}')
break;
if(!data)
Host_Error("ED_ParseEntity: EOF without closing brace");
q_strlcpy(keyname, com_token, sizeof(keyname));
// parse value
data = COM_Parse(data);
if(!data)
Host_Error("ED_ParseEntity: EOF without closing brace");
if(com_token[0] == '}')
Host_Error("ED_ParseEntity: closing brace without data");
key = ED_FindGlobal(keyname);
if(!key)
{
Con_Printf("'%s' is not a global\n", keyname);
continue;
}
if(!ED_ParseEpair(pr_global_data, key, com_token))
Host_Error("ED_ParseGlobals: parse error");
}
return data;
}
//============================================================================
/*
=============
ED_NewString
=============
*/
static string_t ED_NewString(const char *string)
{
char *new_p;
int32_t i, l;
string_t num;
l = strlen(string) + 1;
num = PR_AllocString(l, &new_p);
for(i = 0; i < l; i++)
{
if(string[i] == '\\' && i < l - 1)
{
i++;
if(string[i] == 'n')
*new_p++ = '\n';
else
*new_p++ = '\\';
}
else
*new_p++ = string[i];
}
return num;
}
/*
=============
ED_ParseEval
=============
*/
bool ED_ParseEpair(void *base, ddef_t *key, const char *s)
{
int32_t i;
char string[128];
ddef_t *def;
char *v, *w;
char *end;
void *d;
dfunction_t *func;
d = (int32_t *)base + key->ofs;
switch(key->type & ~DEF_SAVEGLOBAL)
{
case ev_string:
*(string_t *)d = ED_NewString(s);
break;
case ev_float:
*(float *)d = atof(s);
break;
case ev_vector:
q_strlcpy(string, s, sizeof(string));
end = (char *)string + strlen(string);
v = string;
w = string;
for(i = 0; i < 3 && (w <= end); i++) // ericw -- added (w <= end) check
{
// set v to the next space (or 0 byte), and change that char to a 0 byte
while(*v && *v != ' ')
v++;
*v = 0;
((float *)d)[i] = atof(w);
w = v = v + 1;
}
// ericw -- fill remaining elements to 0 in case we hit the end of string
// before reading 3 floats.
if(i < 3)
{
Con_DWarning("Avoided reading garbage for \"%s\" \"%s\"\n", PR_GetString(key->s_name), s);
for(; i < 3; i++)
((float *)d)[i] = 0.0f;
}
break;
case ev_entity:
*(int32_t *)d = EdictProg(EdictNum(atoi(s)));
break;
case ev_field:
def = ED_FindField(s);
if(!def)
{
//johnfitz -- HACK -- suppress error becuase fog/sky might not be mentioned in defs.qc
if(strncmp(s, "sky", 3) && strcmp(s, "fog"))
Con_DPrintf("Can't find field %s\n", s);
return false;
}
*(int32_t *)d = G_Int(def->ofs);
break;
case ev_function:
func = ED_FindFunction(s);
if(!func)
{
Con_Printf("Can't find function %s\n", s);
return false;
}
*(func_t *)d = func - pr_functions;
break;
default:
break;
}
return true;
}
/*
====================
ED_ParseEdict
Parses an edict out of the given string, returning the new position
ed should be a properly initialized empty edict.
Used for initial level load and for savegames.
====================
*/
const char *ED_ParseEdict(const char *data, edict_t *ent)
{
ddef_t *key;
char keyname[256];
bool anglehack, init;
int32_t n;
init = false;
// clear it
if(ent != sv.edicts) // hack
memset(ent->fields, 0, progs.entityfields * 4);
// go through all the dictionary pairs
while(1)
{
// parse key
data = COM_Parse(data);
if(com_token[0] == '}')
break;
if(!data)
Host_Error("ED_ParseEntity: EOF without closing brace");
// anglehack is to allow QuakeEd to write single scalar angles
// and allow them to be turned into vectors. (FIXME...)
if(!strcmp(com_token, "angle"))
{
strcpy(com_token, "angles");
anglehack = true;
}
else
anglehack = false;
// FIXME: change light to _light to get rid of this hack
if(!strcmp(com_token, "light"))
strcpy(com_token, "light_lev"); // hack for single light def
q_strlcpy(keyname, com_token, sizeof(keyname));
// another hack to fix keynames with trailing spaces
n = strlen(keyname);
while(n && keyname[n - 1] == ' ')
{
keyname[n - 1] = 0;
n--;
}
// parse value
data = COM_Parse(data);
if(!data)
Host_Error("ED_ParseEntity: EOF without closing brace");
if(com_token[0] == '}')
Host_Error("ED_ParseEntity: closing brace without data");
init = true;
// keynames with a leading underscore are used for utility comments,
// and are immediately discarded by quake
if(keyname[0] == '_')
continue;
//johnfitz -- hack to support .alpha even when program doesn't know about it
if(!strcmp(keyname, "alpha"))
ent->alpha = ENTALPHA_ENCODE(atof(com_token));
//johnfitz
key = ED_FindField(keyname);
if(!key)
{
//johnfitz -- HACK -- suppress error becuase fog/sky/alpha might not be mentioned in defs.qc
if(strncmp(keyname, "sky", 3) && strcmp(keyname, "fog") && strcmp(keyname, "alpha"))
Con_DPrintf("\"%s\" is not a field\n", keyname); //johnfitz -- was Con_Printf
continue;
}
if(anglehack)
{
char temp[32];
strcpy(temp, com_token);
sprintf(com_token, "0 %s 0", temp);
}
if(!ED_ParseEpair(ent->fields, key, com_token))
Host_Error("ED_ParseEdict: parse error");
}
if(!init)
ent->free = true;
return data;
}
/*
================
ED_LoadFromFile
The entities are directly placed in the array, rather than allocated with
ED_Alloc, because otherwise an error loading the map would have entity
number references out of order.
Creates a server's entity / program execution context by
parsing textual entity definitions out of an ent file.
Used for both fresh maps and savegame loads. A fresh map would also need
to call ED_CallSpawnFunctions () to let the objects initialize themselves.
================
*/
void ED_LoadFromFile(const char *data)
{
dfunction_t *func;
edict_t *ent = NULL;
int32_t inhibit = 0;
G_Float(GBL_time) = sv.time;
// parse ents
while(1)
{
// parse the opening brace
data = COM_Parse(data);
if(!data)
break;
if(com_token[0] != '{')
Host_Error("ED_LoadFromFile: found %s when expecting {", com_token);
if(!ent)
ent = EdictNum(0);
else
ent = ED_Alloc();
data = ED_ParseEdict(data, ent);
// remove things from different skill levels or deathmatch
if(deathmatch.value)
{
if(((int32_t)ED_Float(ent, ED_spawnflags) & SPAWNFLAG_NOT_DEATHMATCH))
{
ED_Free(ent);
inhibit++;
continue;
}
}
else if((current_skill == 0 && ((int32_t)ED_Float(ent, ED_spawnflags) & SPAWNFLAG_NOT_EASY))
|| (current_skill == 1 && ((int32_t)ED_Float(ent, ED_spawnflags) & SPAWNFLAG_NOT_MEDIUM))
|| (current_skill >= 2 && ((int32_t)ED_Float(ent, ED_spawnflags) & SPAWNFLAG_NOT_HARD)))
{
ED_Free(ent);
inhibit++;
continue;
}
//
// immediately call spawn function
//
if(!ED_RString(ent, ED_classname))
{
Con_SafePrintf("No classname for:\n"); //johnfitz -- was Con_Printf
ED_Print(ent);
ED_Free(ent);
continue;
}
// look for the spawn function
func = ED_FindFunction(ED_String(ent, ED_classname));
if(!func)
{
Con_SafePrintf("No spawn function for:\n"); //johnfitz -- was Con_Printf
ED_Print(ent);
ED_Free(ent);
continue;
}
G_PEdict(GBL_self) = EdictProg(ent);
PR_ExecuteProgram(func - pr_functions);
}
Con_DPrintf("%" PRIi32 " entities inhibited\n", inhibit);
}
void ED_Load(void)
{
int32_t i;
// flush the non-C variable lookup cache
for(i = 0; i < GEFV_CACHESIZE; i++)
gefvCache[i].field[0] = 0;
}
void ED_Init(void)
{
Cmd_AddCommand("edict", ED_PrintEdict_f);
Cmd_AddCommand("edicts", ED_PrintEdicts);
Cmd_AddCommand("edictcount", ED_Count);
}
edict_t *EdictNum(int32_t n)
{
if(n < 0 || n >= sv.max_edicts)
Host_Error("EdictNum: bad number %" PRIi32, n);
return ProgEdict(n * pr_edict_size);
}
int32_t NumForEdict(edict_t *e)
{
int32_t b;
b = EdictProg(e);
b = b / pr_edict_size;
if(b < 0 || b >= sv.num_edicts)
Host_Error("NumForEdict: bad pointer");
return b;
}
pedict_t EdictProg(void *e)
{
return (byte *)e - (byte *)sv.edicts;
}
void *ProgEdict(pedict_t e)
{
return (byte *)sv.edicts + e;
}
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