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quakeforge/libs/gamecode/engine/pr_edict.c

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/*
pr_edict.c
entity dictionary
Copyright (C) 1996-1997 Id Software, Inc.
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdarg.h>
#include <stdio.h>
#include "QF/cbuf.h"
#include "QF/idparse.h"
#include "QF/crc.h"
#include "QF/cvar.h"
#include "QF/hash.h"
#include "QF/progs.h"
#include "QF/qdefs.h"
#include "QF/qendian.h"
#include "QF/sys.h"
#include "QF/zone.h"
#include "QF/va.h"
#include "QF/vfs.h"
#include "compat.h"
cvar_t *pr_boundscheck;
cvar_t *pr_deadbeef_ents;
cvar_t *pr_deadbeef_locals;
int pr_type_size[ev_type_count] = {
1, // ev_void
1, // ev_string
1, // ev_float
3, // ev_vector
1, // ev_entity
1, // ev_field
1, // ev_func
1, // ev_pointer
4, // ev_quaternion
1, // ev_integer
1, // ev_uinteger
0, // ev_short value in opcode
0, // ev_struct variable
0, // ev_object variable
0, // ev_class variable
2, // ev_sel
0, // ev_array variable
};
const char *pr_type_name[ev_type_count] = {
"void",
"string",
"float",
"vector",
"entity",
"field",
"function",
"pointer",
"quaternion",
"integer",
"uinteger",
"short",
"struct",
"object",
"Class",
"SEL",
"array",
};
ddef_t *ED_FieldAtOfs (progs_t * pr, int ofs);
qboolean ED_ParseEpair (progs_t * pr, pr_type_t *base, ddef_t *key, const char *s);
/*
ED_ClearEdict
Sets everything to NULL
*/
void
ED_ClearEdict (progs_t * pr, edict_t *e, int val)
{
int i;
if (NUM_FOR_EDICT(pr,e)<*pr->reserved_edicts)
Sys_Printf("clearing reserved edict %d\n", NUM_FOR_EDICT(pr,e));
for (i=0; i < pr->progs->entityfields; i++)
e->v[i].integer_var = val;
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 (progs_t * pr)
{
int i;
edict_t *e;
int start = pr->reserved_edicts ? *pr->reserved_edicts : 0;
int max_edicts = pr->pr_edictareasize / pr->pr_edict_size;
for (i = start + 1; i < *(pr)->num_edicts; i++) {
e = EDICT_NUM (pr, 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 || *(pr)->time - e->freetime > 0.5)) {
ED_ClearEdict (pr, e, 0);
return e;
}
}
if (i == max_edicts) {
Sys_Printf ("WARNING: ED_Alloc: no free edicts\n");
i--; // step on whatever is the last edict
e = EDICT_NUM (pr, i);
if (pr->unlink)
pr->unlink (e);
} else
(*(pr)->num_edicts)++;
e = EDICT_NUM (pr, i);
ED_ClearEdict (pr, e, 0);
return e;
}
/*
ED_FreeRefs
NULLs all references to entity
*/
void
ED_FreeRefs (progs_t * pr, edict_t *ed)
{
int i, j, k;
ddef_t *def;
for (i = 0; i < pr->progs->numglobaldefs; i++) {
def = &pr->pr_globaldefs[i];
if ((def->type & ~DEF_SAVEGLOBAL) == ev_entity) {
if (ed == G_EDICT (pr, def->ofs)) {
Sys_Printf ("Reference found to free'd edict: %p\n", ed);
}
}
}
for (i = 0; i < pr->progs->numfielddefs; i++) {
def = &pr->pr_fielddefs[i];
if ((def->type & ~DEF_SAVEGLOBAL) == ev_entity) {
for (j = 0; j < *pr->num_edicts; j++) {
k = E_var (EDICT_NUM (pr, j), def->ofs, entity);
if (ed == PROG_TO_EDICT (pr, k))
Sys_Printf ("Reference found to free'd edict: %p\n", ed);
}
}
}
}
/*
ED_Free
Marks the edict as free
FIXME: walk all entities and NULL out references to this entity
*/
void
ED_Free (progs_t * pr, edict_t *ed)
{
if (pr->unlink)
pr->unlink (ed); // unlink from world bsp
if (pr_deadbeef_ents->int_val) {
ED_ClearEdict (pr, ed, 0xdeadbeef);
} else {
if (pr->free_edict)
pr->free_edict (pr, ed);
else
ED_ClearEdict (pr, ed, 0);
}
ed->free = true;
ed->freetime = *(pr)->time;
}
//===========================================================================
/*
PR_ValueString
Returns a string describing *data in a type specific manner
*/
char *
PR_ValueString (progs_t * pr, etype_t type, pr_type_t *val)
{
static char line[256];
ddef_t *def;
dfunction_t *f;
type &= ~DEF_SAVEGLOBAL;
switch (type) {
case ev_string:
snprintf (line, sizeof (line), "%s",
PR_GetString (pr, val->string_var));
break;
case ev_entity:
snprintf (line, sizeof (line), "entity %i",
NUM_FOR_BAD_EDICT (pr, PROG_TO_EDICT (pr, val->entity_var)));
break;
case ev_func:
if (val->func_var < 0 || val->func_var >= pr->progs->numfunctions)
snprintf (line, sizeof (line), "INVALID:%d", val->func_var);
else if (!val->func_var)
return "NULL";
else {
f = pr->pr_functions + val->func_var;
snprintf (line, sizeof (line), "%s()",
PR_GetString (pr, f->s_name));
}
break;
case ev_field:
def = ED_FieldAtOfs (pr, val->integer_var);
snprintf (line, sizeof (line), ".%s",
PR_GetString (pr, def->s_name));
break;
case ev_void:
strcpy (line, "void");
break;
case ev_float:
snprintf (line, sizeof (line), "%5.1f", val->float_var);
break;
case ev_vector:
snprintf (line, sizeof (line), "'%5.1f %5.1f %5.1f'",
val->vector_var[0], val->vector_var[1],
val->vector_var[2]);
break;
case ev_pointer:
snprintf (line, sizeof (line), "[%d]", val->integer_var);
break;
case ev_quaternion:
snprintf (line, sizeof (line), "'%5.1f %5.1f %5.1f %5.1f'",
val->vector_var[0], val->vector_var[1],
val->vector_var[2], val->vector_var[3]);
break;
case ev_integer:
snprintf (line, sizeof (line), "%d", val->integer_var);
break;
case ev_uinteger:
snprintf (line, sizeof (line), "%u", val->uinteger_var);
break;
default:
snprintf (line, sizeof (line), "bad type %i", type);
break;
}
return line;
}
/*
PR_UglyValueString
Returns a string describing *data in a type specific manner
Easier to parse than PR_ValueString
*/
char *
PR_UglyValueString (progs_t * pr, etype_t type, pr_type_t *val)
{
static char line[256];
ddef_t *def;
dfunction_t *f;
type &= ~DEF_SAVEGLOBAL;
switch (type) {
case ev_string:
snprintf (line, sizeof (line), "%s",
PR_GetString (pr, val->string_var));
break;
case ev_entity:
snprintf (line, sizeof (line), "%i",
NUM_FOR_BAD_EDICT (pr, PROG_TO_EDICT (pr, val->entity_var)));
break;
case ev_func:
f = pr->pr_functions + val->func_var;
snprintf (line, sizeof (line), "%s", PR_GetString (pr, f->s_name));
break;
case ev_field:
def = ED_FieldAtOfs (pr, val->integer_var);
snprintf (line, sizeof (line), "%s",
PR_GetString (pr, def->s_name));
break;
case ev_void:
strcpy (line, "void");
break;
case ev_float:
snprintf (line, sizeof (line), "%f", val->float_var);
break;
case ev_vector:
snprintf (line, sizeof (line), "%f %f %f", val->vector_var[0],
val->vector_var[1], val->vector_var[2]);
break;
default:
snprintf (line, sizeof (line), "bad type %i", type);
break;
}
return line;
}
/*
PR_GlobalString
Returns a string with a description and the contents of a global,
padded to 20 field width
*/
char *
PR_GlobalString (progs_t * pr, int ofs, etype_t type)
{
char *s;
int i;
ddef_t *def = 0;
static char line[128];
if (type == ev_short) {
snprintf (line, sizeof (line), "%-20d", (short) ofs);
return line;
}
if (pr_debug->int_val && pr->debug)
def = PR_Get_Local_Def (pr, ofs);
if (!def)
def = ED_GlobalAtOfs (pr, ofs);
if (!def && type == ev_void)
snprintf (line, sizeof (line), "%i(?)", ofs);
else {
char *name = "?";
char *oi = "";
if (def) {
if (type == ev_void)
type = def->type;
name = PR_GetString (pr, def->s_name);
if (type != (def->type & ~DEF_SAVEGLOBAL))
oi = "!";
}
if (ofs > pr->globals_size)
s = "Out of bounds";
else
s = PR_ValueString (pr, type, &pr->pr_globals[ofs]);
snprintf (line, sizeof (line), "%i(%s%s)%s", ofs, oi, name, s);
}
i = strlen (line);
for (; i < 20; i++)
strncat (line, " ", sizeof (line) - strlen (line));
strncat (line, " ", sizeof (line) - strlen (line));
return line;
}
char *
PR_GlobalStringNoContents (progs_t * pr, int ofs, etype_t type)
{
int i;
ddef_t *def = 0;
static char line[128];
if (type == ev_short) {
snprintf (line, sizeof (line), "%-20d", (short) ofs);
return line;
}
if (pr_debug->int_val && pr->debug)
def = PR_Get_Local_Def (pr, ofs);
if (!def)
def = ED_GlobalAtOfs (pr, ofs);
if (!def)
snprintf (line, sizeof (line), "%i(?)", ofs);
else
snprintf (line, sizeof (line), "%i(%s)", ofs,
PR_GetString (pr, def->s_name));
i = strlen (line);
for (; i < 20; i++)
strncat (line, " ", sizeof (line) - strlen (line));
strncat (line, " ", sizeof (line) - strlen (line));
return line;
}
/*
ED_Print
For debugging
*/
void
ED_Print (progs_t * pr, edict_t *ed)
{
int l;
ddef_t *d;
pr_type_t *v;
int i;
char *name;
int type;
if (ed->free) {
Sys_Printf ("FREE\n");
return;
}
Sys_Printf ("\nEDICT %i:\n", NUM_FOR_BAD_EDICT (pr, ed));
for (i = 1; i < pr->progs->numfielddefs; i++) {
d = &pr->pr_fielddefs[i];
name = PR_GetString (pr, d->s_name);
if (name[strlen (name) - 2] == '_')
continue; // skip _x, _y, _z vars
v = ed->v + d->ofs;
// if the value is still all 0, skip the field
type = d->type & ~DEF_SAVEGLOBAL;
switch (type) {
case ev_entity:
case ev_integer:
case ev_func:
case ev_field:
if (!v->integer_var)
continue;
break;
case ev_string:
if (!PR_GetString (pr, v->string_var)[0])
continue;
break;
case ev_float:
if (!v->float_var)
continue;
break;
case ev_vector:
if (!v[0].float_var && !v[1].float_var && !v[2].float_var)
continue;
break;
default:
PR_Error (pr, "ED_Print: Unhandled type %d", type);
}
Sys_Printf ("%s", name);
l = strlen (name);
while (l++ < 15)
Sys_Printf (" ");
Sys_Printf ("%s\n", PR_ValueString (pr, d->type, v));
}
}
/*
ED_Write
For savegames
*/
void
ED_Write (progs_t * pr, VFile *f, edict_t *ed)
{
ddef_t *d;
pr_type_t *v;
int i, j;
char *name;
int type;
Qprintf (f, "{\n");
if (ed->free) {
Qprintf (f, "}\n");
return;
}
for (i = 1; i < pr->progs->numfielddefs; i++) {
d = &pr->pr_fielddefs[i];
name = PR_GetString (pr, d->s_name);
if (name[strlen (name) - 2] == '_')
continue; // skip _x, _y, _z vars
v = &ed->v[d->ofs];
// if the value is still all 0, skip the field
type = d->type & ~DEF_SAVEGLOBAL;
for (j = 0; j < pr_type_size[type]; j++)
if (v[j].integer_var)
break;
if (j == pr_type_size[type])
continue;
Qprintf (f, "\"%s\" ", name);
Qprintf (f, "\"%s\"\n", PR_UglyValueString (pr, d->type, v));
}
Qprintf (f, "}\n");
}
void
ED_PrintNum (progs_t * pr, int ent)
{
ED_Print (pr, EDICT_NUM (pr, ent));
}
/*
ED_PrintEdicts
For debugging, prints all the entities in the current server
*/
void
ED_PrintEdicts (progs_t *pr, const char *fieldval)
{
int i;
int count;
ddef_t *def;
def = ED_FindField(pr, "classname");
if (fieldval && fieldval[0] && def) {
count = 0;
for (i = 0; i < *(pr)->num_edicts; i++)
if (strequal(fieldval, E_STRING (pr, EDICT_NUM(pr, i), def->ofs))) {
ED_PrintNum (pr, i);
count++;
}
Sys_Printf ("%i entities\n", count);
} else {
for (i = 0; i < *(pr)->num_edicts; i++)
ED_PrintNum (pr, i);
Sys_Printf ("%i entities\n", *(pr)->num_edicts);
}
}
/*
ED_Count
For debugging
*/
void
ED_Count (progs_t * pr)
{
int i;
edict_t *ent;
int active, models, solid, step, zombie;
ddef_t *solid_def;
ddef_t *model_def;
solid_def = ED_FindField (pr, "solid");
model_def = ED_FindField (pr, "model");
active = models = solid = step = zombie = 0;
for (i = 0; i < *(pr)->num_edicts; i++) {
ent = EDICT_NUM (pr, i);
if (ent->free) {
if (*(pr)->time - ent->freetime <= 0.5)
zombie++;
continue;
}
active++;
if (solid_def && ent->v[solid_def->ofs].float_var)
solid++;
if (model_def && ent->v[model_def->ofs].float_var)
models++;
}
Sys_Printf ("num_edicts:%3i\n", *(pr)->num_edicts);
Sys_Printf ("active :%3i\n", active);
Sys_Printf ("view :%3i\n", models);
Sys_Printf ("touch :%3i\n", solid);
Sys_Printf ("zombie :%3i\n", zombie);
}
/*
ARCHIVING GLOBALS
FIXME: need to tag constants, doesn't really work
*/
/*
ED_WriteGlobals
*/
void
ED_WriteGlobals (progs_t * pr, VFile *f)
{
ddef_t *def;
int i;
char *name;
int type;
Qprintf (f, "{\n");
for (i = 0; i < pr->progs->numglobaldefs; i++) {
def = &pr->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 (pr, def->s_name);
Qprintf (f, "\"%s\" ", name);
Qprintf (f, "\"%s\"\n",
PR_UglyValueString (pr, type, &pr->pr_globals[def->ofs]));
}
Qprintf (f, "}\n");
}
/*
ED_ParseGlobals
*/
void
ED_ParseGlobals (progs_t * pr, const char *data)
{
char keyname[64];
ddef_t *key;
while (1) {
// parse key
data = COM_Parse (data);
if (com_token[0] == '}')
break;
if (!data)
PR_Error (pr, "ED_ParseEntity: EOF without closing brace");
strcpy (keyname, com_token);
// parse value
data = COM_Parse (data);
if (!data)
PR_Error (pr, "ED_ParseEntity: EOF without closing brace");
if (com_token[0] == '}')
PR_Error (pr, "ED_ParseEntity: closing brace without data");
key = PR_FindGlobal (pr, keyname);
if (!key) {
Sys_Printf ("'%s' is not a global\n", keyname);
continue;
}
if (!ED_ParseEpair (pr, pr->pr_globals, key, com_token))
PR_Error (pr, "ED_ParseGlobals: parse error");
}
}
//============================================================================
/*
ED_NewString
*/
char *
ED_NewString (progs_t * pr, const char *string)
{
char *new, *new_p;
int i, l;
l = strlen (string) + 1;
new = Hunk_Alloc (l);
new_p = new;
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 new;
}
/*
ED_ParseEval
Can parse either fields or globals
returns false if error
*/
qboolean
ED_ParseEpair (progs_t * pr, pr_type_t *base, ddef_t *key, const char *s)
{
int i;
char string[128];
ddef_t *def;
char *v, *w;
pr_type_t *d;
dfunction_t *func;
d = &base[key->ofs];
switch (key->type & ~DEF_SAVEGLOBAL) {
case ev_string:
d->string_var = PR_SetString (pr, ED_NewString (pr, s));
break;
case ev_float:
d->float_var = atof (s);
break;
case ev_vector:
strcpy (string, s);
v = string;
w = string;
for (i = 0; i < 3; i++) {
while (*v && *v != ' ')
v++;
*v = 0;
d->vector_var[i] = atof (w);
w = v = v + 1;
}
break;
case ev_entity:
d->entity_var = EDICT_TO_PROG (pr, EDICT_NUM (pr, atoi (s)));
break;
case ev_field:
def = ED_FindField (pr, s);
if (!def) {
Sys_Printf ("Can't find field %s\n", s);
return false;
}
d->integer_var = G_INT (pr, def->ofs);
break;
case ev_func:
func = ED_FindFunction (pr, s);
if (!func) {
Sys_Printf ("Can't find function %s\n", s);
return false;
}
d->func_var = func - pr->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 (progs_t * pr, const char *data, edict_t *ent)
{
ddef_t *key;
qboolean anglehack;
qboolean init;
char keyname[256];
const char *token;
int n;
init = false;
// clear it
if (ent != *(pr)->edicts) // hack
memset (&ent->v, 0, pr->progs->entityfields * 4);
// go through all the dictionary pairs
while (1) {
// parse key
data = COM_Parse (data);
if (com_token[0] == '}')
break;
if (!data)
PR_Error (pr, "ED_ParseEntity: EOF without closing brace");
token = com_token;
// anglehack is to allow QuakeEd to write single scalar angles
// and allow them to be turned into vectors. (FIXME...)
if (!strcmp (token, "angle")) {
token = "angles";
anglehack = true;
} else
anglehack = false;
if (!strcmp (token, "light"))
token = "light_lev"; // hack for single light def
strcpy (keyname, token);
// another hack to fix heynames with trailing spaces
n = strlen (keyname);
while (n && keyname[n - 1] == ' ') {
keyname[n - 1] = 0;
n--;
}
// parse value
data = COM_Parse (data);
if (!data)
PR_Error (pr, "ED_ParseEntity: EOF without closing brace");
if (com_token[0] == '}')
PR_Error (pr, "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;
key = ED_FindField (pr, keyname);
if (!key) {
if (!pr->parse_field || !pr->parse_field (pr, keyname, com_token)) {
Sys_Printf ("'%s' is not a field\n", keyname);
continue;
}
} else {
int ret;
if (anglehack) {
ret = ED_ParseEpair (pr, ent->v, key, va ("0 %s 0", com_token));
} else {
ret = ED_ParseEpair (pr, ent->v, key, com_token);
}
if (!ret)
PR_Error (pr, "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 (progs_t * pr, const char *data)
{
edict_t *ent;
int inhibit;
dfunction_t *func;
pr_type_t *classname;
ddef_t *def;
ent = NULL;
inhibit = 0;
*pr->globals.time = *(pr)->time;
// parse ents
while (1) {
// parse the opening brace
data = COM_Parse (data);
if (!data)
break;
if (com_token[0] != '{')
PR_Error (pr, "ED_LoadFromFile: found %s when expecting {", com_token);
if (!ent)
ent = EDICT_NUM (pr, 0);
else
ent = ED_Alloc (pr);
data = ED_ParseEdict (pr, data, ent);
// remove things from different skill levels or deathmatch
if (pr->prune_edict && pr->prune_edict (pr, ent)) {
ED_Free (pr, ent);
inhibit++;
continue;
}
//
// immediately call spawn function
//
def = ED_FindField (pr, "classname");
if (!def) {
Sys_Printf ("No classname for:\n");
ED_Print (pr, ent);
ED_Free (pr, ent);
continue;
}
classname = &ent->v[def->ofs];
// look for the spawn function
func = ED_FindFunction (pr, PR_GetString (pr, classname->string_var));
if (!func) {
Sys_Printf ("No spawn function for:\n");
ED_Print (pr, ent);
ED_Free (pr, ent);
continue;
}
*pr->globals.self = EDICT_TO_PROG (pr, ent);
PR_ExecuteProgram (pr, func - pr->pr_functions);
if (pr->flush)
pr->flush ();
}
Sys_DPrintf ("%i entities inhibited\n", inhibit);
}
edict_t *
PR_InitEdicts (progs_t *pr, int num_edicts)
{
edict_t *edicts;
edict_t *e;
int i, j;
pr->pr_edictareasize = pr->pr_edict_size * num_edicts;
edicts = Hunk_AllocName (pr->pr_edictareasize, "edicts");
(*pr->edicts) = edicts;
if (pr_deadbeef_ents->int_val) {
memset (edicts, 0, *pr->reserved_edicts * pr->pr_edict_size);
for (j = *pr->reserved_edicts; j < num_edicts; j++) {
e = EDICT_NUM (pr, j);
for (i=0; i < pr->progs->entityfields; i++)
e->v[i].integer_var = 0xdeadbeef;
}
} else {
memset (edicts, 0, pr->pr_edictareasize);
}
return edicts;
}
edict_t *
EDICT_NUM (progs_t * pr, int n)
{
int offs = n * pr->pr_edict_size;
if (offs < 0 || n >= pr->pr_edictareasize)
PR_RunError (pr, "EDICT_NUM: bad number %i", n);
return PROG_TO_EDICT (pr, offs);
}
int
NUM_FOR_BAD_EDICT (progs_t *pr, edict_t *e)
{
int b;
b = (byte *) e - (byte *) * (pr)->edicts;
b = b / pr->pr_edict_size;
return b;
}
int
NUM_FOR_EDICT (progs_t *pr, edict_t *e)
{
int b;
b = NUM_FOR_BAD_EDICT (pr, e);
if (b && (b < 0 || b >= *(pr)->num_edicts))
PR_RunError (pr, "NUM_FOR_EDICT: bad pointer %d %p %p", b, e, * (pr)->edicts);
return b;
}
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