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quakeforge/libs/gamecode/engine/pr_load.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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((unused)) const char rcsid[] =
"$Id$";
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdarg.h>
#include <stdio.h>
#include "QF/cmd.h"
#include "QF/crc.h"
#include "QF/cvar.h"
#include "QF/dstring.h"
#include "QF/hash.h"
#include "QF/progs.h"
#include "QF/qdefs.h"
#include "QF/qendian.h"
#include "QF/quakefs.h"
#include "QF/sys.h"
#include "QF/zone.h"
#include "QF/va.h"
#include "compat.h"
cvar_t *pr_boundscheck;
cvar_t *pr_deadbeef_ents;
cvar_t *pr_deadbeef_locals;
cvar_t *pr_faultchecks;
static const char *
function_get_key (void *f, void *_pr)
{
progs_t *pr = (progs_t*)_pr;
dfunction_t *func = (dfunction_t*)f;
return PR_GetString (pr, func->s_name);
}
static const char *
var_get_key (void *d, void *_pr)
{
progs_t *pr = (progs_t*)_pr;
ddef_t *def = (ddef_t*)d;
return PR_GetString (pr, def->s_name);
}
static void
file_error (progs_t *pr, const char *path)
{
Sys_Printf ("failed to load %s\n", path);
}
static void *
load_file (progs_t *pr, const char *path)
{
return QFS_LoadHunkFile (path);
}
static void *
allocate_progs_mem (progs_t *pr, int size)
{
return Hunk_AllocName (size, pr->progs_name);
}
static void
free_progs_mem (progs_t *pr, void *mem)
{
}
void
PR_LoadProgsFile (progs_t * pr, QFile *file, int size, int edicts, int zone)
{
unsigned i;
int mem_size;
dprograms_t progs;
pr->progs = 0;
if (Qread (file, &progs, sizeof (progs)) != sizeof (progs))
PR_Error (pr, "error reading header");
// store prog crc
pr->crc = CRC_Block ((byte*)&progs, sizeof (progs));
// byte swap the header
for (i = 0; i < sizeof (progs) / 4; i++)
((int *) &progs)[i] = LittleLong (((int *) &progs)[i]);
if (progs.version != PROG_VERSION
&& progs.version != PROG_ID_VERSION) {
if (progs.version < 0x00fff000) {
PR_Error (pr, "%s has unrecognised version number (%d)",
pr->progs_name, progs.version);
} else {
PR_Error (pr,
"%s has unrecognised version number (%02x.%03x.%03x)"
" [%02x.%03x.%03x expected]",
pr->progs_name,
progs.version >> 24,
(progs.version >> 12) & 0xfff,
progs.version & 0xfff,
PROG_VERSION >> 24,
(PROG_VERSION >> 12) & 0xfff,
PROG_VERSION & 0xfff);
}
}
// size of progs themselves
pr->progs_size = size;
Sys_DPrintf ("Programs occupy %iK.\n", size / 1024);
// round off to next highest whole word address (esp for Alpha)
// this ensures that pointers in the engine data area are always
// properly aligned
pr->progs_size += sizeof (void*) - 1;
pr->progs_size &= ~(sizeof (void*) - 1);
// size of heap asked for by vm-subsystem
pr->zone_size = zone;
// round off to next highest whole word address (esp for Alpha)
// this ensures that pointers in the engine data area are always
// properly aligned
pr->zone_size += sizeof (void*) - 1;
pr->zone_size &= ~(sizeof (void*) - 1);
// size of edict asked for by progs
pr->pr_edict_size = progs.entityfields * 4;
// size of engine data
pr->pr_edict_size += sizeof (edict_t) - sizeof (pr_type_t);
// round off to next highest whole word address (esp for Alpha)
// this ensures that pointers in the engine data area are always
// properly aligned
pr->pr_edict_size += sizeof (void*) - 1;
pr->pr_edict_size &= ~(sizeof (void*) - 1);
pr->pr_edictareasize = edicts * pr->pr_edict_size;
if (!pr->file_error)
pr->file_error = file_error;
if (!pr->load_file)
pr->load_file = load_file;
if (!pr->allocate_progs_mem)
pr->allocate_progs_mem = allocate_progs_mem;
if (!pr->free_progs_mem)
pr->free_progs_mem = free_progs_mem;
PR_Resources_Clear (pr);
PR_ClearReturnStrings (pr);
if (pr->progs)
pr->free_progs_mem (pr, pr->progs);
mem_size = pr->progs_size + pr->zone_size + pr->pr_edictareasize;
pr->progs = pr->allocate_progs_mem (pr, mem_size + 1);
if (!pr->progs)
return;
((byte *) pr->progs)[mem_size] = 0;
memcpy (pr->progs, &progs, sizeof (progs));
Qread (file, pr->progs + 1, size - sizeof (progs));
CRC_ProcessBlock ((byte *)(pr->progs + 1), &pr->crc,
size - sizeof (progs));
if (pr->edicts)
*pr->edicts = (edict_t *)((byte *) pr->progs + pr->progs_size);
pr->zone = (memzone_t *)((byte *) pr->progs + pr->progs_size
+ pr->pr_edictareasize);
if (pr->zone_size)
PR_Zone_Init (pr);
pr->pr_functions =
(dfunction_t *) ((byte *) pr->progs + pr->progs->ofs_functions);
pr->pr_strings = (char *) pr->progs + pr->progs->ofs_strings;
pr->pr_stringsize = (char *) pr->zone + pr->zone_size - (char *) pr->progs;
pr->pr_globaldefs =
(ddef_t *) ((byte *) pr->progs + pr->progs->ofs_globaldefs);
pr->pr_fielddefs =
(ddef_t *) ((byte *) pr->progs + pr->progs->ofs_fielddefs);
pr->pr_statements =
(dstatement_t *) ((byte *) pr->progs + pr->progs->ofs_statements);
pr->pr_globals =
(pr_type_t *) ((byte *) pr->progs + pr->progs->ofs_globals);
pr->globals_size = (pr_type_t*)((byte *) pr->zone + pr->zone_size)
- pr->pr_globals;
if (pr->function_hash) {
Hash_FlushTable (pr->function_hash);
} else {
pr->function_hash = Hash_NewTable (1021, function_get_key, 0, pr);
}
if (pr->global_hash) {
Hash_FlushTable (pr->global_hash);
} else {
pr->global_hash = Hash_NewTable (1021, var_get_key, 0, pr);
}
if (pr->field_hash) {
Hash_FlushTable (pr->field_hash);
} else {
pr->field_hash = Hash_NewTable (1021, var_get_key, 0, pr);
}
// byte swap the lumps
for (i = 0; i < pr->progs->numstatements; i++) {
pr->pr_statements[i].op = LittleShort (pr->pr_statements[i].op);
pr->pr_statements[i].a = LittleShort (pr->pr_statements[i].a);
pr->pr_statements[i].b = LittleShort (pr->pr_statements[i].b);
pr->pr_statements[i].c = LittleShort (pr->pr_statements[i].c);
}
for (i = 0; i < (unsigned int) pr->progs->numfunctions; i++) {
pr->pr_functions[i].first_statement =
LittleLong (pr->pr_functions[i].first_statement);
pr->pr_functions[i].parm_start =
LittleLong (pr->pr_functions[i].parm_start);
pr->pr_functions[i].s_name = LittleLong (pr->pr_functions[i].s_name);
pr->pr_functions[i].s_file = LittleLong (pr->pr_functions[i].s_file);
pr->pr_functions[i].numparms =
LittleLong (pr->pr_functions[i].numparms);
pr->pr_functions[i].locals = LittleLong (pr->pr_functions[i].locals);
Hash_Add (pr->function_hash, &pr->pr_functions[i]);
}
for (i = 0; i < pr->progs->numglobaldefs; i++) {
pr->pr_globaldefs[i].type = LittleShort (pr->pr_globaldefs[i].type);
pr->pr_globaldefs[i].ofs = LittleShort (pr->pr_globaldefs[i].ofs);
pr->pr_globaldefs[i].s_name = LittleLong (pr->pr_globaldefs[i].s_name);
Hash_Add (pr->global_hash, &pr->pr_globaldefs[i]);
}
for (i = 0; i < pr->progs->numfielddefs; i++) {
pr->pr_fielddefs[i].type = LittleShort (pr->pr_fielddefs[i].type);
if (pr->pr_fielddefs[i].type & DEF_SAVEGLOBAL)
PR_Error (pr, "PR_LoadProgs: pr_fielddefs[i].type & DEF_SAVEGLOBAL");
pr->pr_fielddefs[i].ofs = LittleShort (pr->pr_fielddefs[i].ofs);
pr->pr_fielddefs[i].s_name = LittleLong (pr->pr_fielddefs[i].s_name);
Hash_Add (pr->field_hash, &pr->pr_fielddefs[i]);
}
for (i = 0; i < pr->progs->numglobals; i++)
((int *) pr->pr_globals)[i] = LittleLong (((int *) pr->pr_globals)[i]);
}
void
PR_AddLoadFunc (progs_t *pr, int (*func)(progs_t *))
{
if (pr->num_load_funcs == pr->max_load_funcs) {
int n;
pr->max_load_funcs += 8;
n = pr->max_load_funcs;
pr->load_funcs = realloc (pr->load_funcs,
n * sizeof (pr_load_func_t *));
SYS_CHECKMEM (pr->load_funcs);
}
pr->load_funcs[pr->num_load_funcs++] = func;
}
void
PR_AddLoadFinishFunc (progs_t *pr, int (*func)(progs_t *))
{
if (pr->num_load_finish_funcs == pr->max_load_finish_funcs) {
int n;
pr->max_load_finish_funcs += 8;
n = pr->max_load_finish_funcs;
pr->load_finish_funcs = realloc (pr->load_finish_funcs,
n * sizeof (pr_load_func_t *));
SYS_CHECKMEM (pr->load_finish_funcs);
}
pr->load_finish_funcs[pr->num_load_finish_funcs++] = func;
}
static int
pr_run_ctors (progs_t *pr)
{
int fnum;
dfunction_t *func;
for (fnum = 0; fnum < pr->progs->numfunctions; fnum++) {
func = pr->pr_functions + fnum;
if (strequal (PR_GetString (pr, func->s_name), ".ctor"))
PR_ExecuteProgram (pr, fnum);
}
return 1;
}
static int (*load_funcs_1[])(progs_t *) = {
PR_RelocateBuiltins,
PR_LoadStrings,
PR_LoadDebug,
0,
};
static int (*load_funcs_2[])(progs_t *) = {
PR_ResolveGlobals,
PR_Check_Opcodes,
0,
};
static int
run_load_funcs (progs_t *pr, int (**load_funcs)(progs_t *))
{
int (**lf)(progs_t *);
for (lf = load_funcs; *lf; lf++)
if (!(*lf)(pr))
return 0;
return 1;
}
int
PR_RunLoadFuncs (progs_t *pr)
{
int i;
memset (&pr->globals, 0, sizeof (pr->globals));
pr->fields.nextthink = -1;
pr->fields.frame = -1;
pr->fields.think = -1;
pr->fields.this = -1;
if (!run_load_funcs(pr, load_funcs_1))
return 0;
if (pr->resolve)
if (!pr->resolve (pr))
return 0;
if (!run_load_funcs(pr, load_funcs_2))
return 0;
for (i = 0; i < pr->num_load_funcs; i++)
if (!pr->load_funcs[i] (pr))
return 0;
if (!pr_run_ctors (pr))
return 0;
while (pr->num_load_finish_funcs)
if (!pr->load_finish_funcs[--pr->num_load_finish_funcs] (pr))
return 0;
return 1;
}
/*
PR_LoadProgs
*/
void
PR_LoadProgs (progs_t *pr, const char *progsname, int edicts, int zone)
{
QFile *file;
QFS_FOpenFile (progsname, &file);
pr->progs_name = progsname;
if (file) {
PR_LoadProgsFile (pr, file, qfs_filesize, edicts, zone);
Qclose (file);
}
if (!pr->progs)
return;
if (!PR_RunLoadFuncs (pr))
PR_Error (pr, "unable to load %s", progsname);
}
void
PR_Init_Cvars (void)
{
pr_boundscheck =
Cvar_Get ("pr_boundscheck", "0", CVAR_NONE, NULL,
"Server progs bounds checking");
pr_deadbeef_ents = Cvar_Get ("pr_deadbeef_ents", "0", CVAR_NONE, NULL,
"set to clear unallocated memory to 0xdeadbeef");
pr_deadbeef_locals = Cvar_Get ("pr_deadbeef_locals", "0", CVAR_NONE, NULL,
"set to clear uninitialized local vars to "
"0xdeadbeef");
pr_faultchecks = Cvar_Get ("pr_faultchecks", "0", CVAR_NONE, NULL,
"capture and handle division by 0 in progs");
PR_Debug_Init_Cvars ();
}
void
PR_Init (void)
{
PR_Opcode_Init ();
PR_Debug_Init ();
}
void
PR_Error (progs_t *pr, const char *error, ...)
{
va_list argptr;
dstring_t *string = dstring_new ();
va_start (argptr, error);
dvsprintf (string, error, argptr);
va_end (argptr);
Sys_Error ("%s: %s", pr->progs_name, string->str);
}
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