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object.c
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object.c
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#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <memory.h>
#include "config.h"
#include "lint.h"
#include "mstring.h"
#include "interpret.h"
#include "object.h"
#include "comm.h"
#include "super_snoop.h"
#include "sent.h"
#include "exec.h"
#include "mapping.h"
#include "mudstat.h"
#include "hash.h"
#include "main.h"
#include "simulate.h"
#ifdef DEALLOCATE_MEMORY_AT_SHUTDOWN
#include "call_out.h"
#endif
#include "inline_svalue.h"
extern int d_flag, s_flag;
extern int total_num_prog_blocks, total_prog_block_size;
extern char *add_slash(char *);
int tot_alloc_dest_object = 0;
int tot_removed_object = 0;
#define align(x) ( ((x) + (sizeof(void*)-1) ) & ~(sizeof(void*)-1) )
struct object *previous_ob;
int tot_alloc_object, tot_alloc_object_size;
struct savebuf {
unsigned int max_size;
unsigned int size;
char *buf;
FILE *f;
};
#define STRBUFSIZE 4096
#define MAX_DEPTH 10000
void
add_strbuf(struct savebuf *sbuf, char *str)
{
size_t len = strlen(str);
if (sbuf->f) {
fwrite(str, len, 1, sbuf->f);
return;
}
if (sbuf->size + len + 1 > sbuf->max_size)
{
char *nbuf;
size_t nsize;
nsize = ((len + sbuf->size) / STRBUFSIZE + 1) * STRBUFSIZE;
nbuf = xalloc(nsize);
(void)memcpy(nbuf, sbuf->buf, sbuf->size);
sbuf->max_size = nsize;
free(sbuf->buf);
sbuf->buf = nbuf;
}
(void)strcpy(&(sbuf->buf[sbuf->size]), str);
sbuf->size += len;
}
#define Fprintf(s) if (fprintf s == EOF) failed=1
static void save_one (struct savebuf *,struct svalue *);
static void
save_string(struct savebuf *f, char *s)
{
static char buf[2];
buf[1] = '\0';
add_strbuf(f, "\"");
while (*s)
{
switch (*s)
{
case '"':
add_strbuf(f, "\\\"");
break;
case '\\':
add_strbuf(f, "\\\\");
break;
case '\n':
add_strbuf(f, "\\n");
break;
default:
buf[0] = *s;
add_strbuf(f, buf);
break;
}
s++;
}
add_strbuf(f, "\"");
}
/*
* Encode an array of elements.
*/
static void
save_array(struct savebuf *f, struct vector *v)
{
int i;
add_strbuf(f, "({");
for (i = 0; i < v->size; i++)
{
save_one(f, &v->item[i]);
add_strbuf(f,",");
}
add_strbuf(f,"})");
}
static void
save_mapping(struct savebuf *f, struct mapping *m)
{
int i;
struct apair *p;
add_strbuf(f, "([");
for (i = 0; i < m->size; i++)
{
for(p = m->pairs[i]; p; p = p->next)
{
save_one(f, &p->arg);
add_strbuf(f,":");
save_one(f, &p->val);
add_strbuf(f,",");
}
}
add_strbuf(f,"])");
}
static void
save_one(struct savebuf *f, struct svalue *v)
{
static char buf[48];
static int depth = 0;
if (++depth > MAX_DEPTH)
{
free(f->buf);
depth = 0;
error("Too deep recursion\n");
}
switch(v->type) {
case T_FLOAT:
(void)sprintf(buf,"#%a#", v->u.real);
add_strbuf(f, buf);
break;
case T_NUMBER:
(void)sprintf(buf, "%lld", v->u.number);
add_strbuf(f, buf);
break;
case T_STRING:
save_string(f, v->u.string);
break;
case T_POINTER:
save_array(f, v->u.vec);
break;
case T_MAPPING:
save_mapping(f, v->u.map);
break;
case T_OBJECT:
(void)sprintf(buf, "$%d@", v->u.ob->created);
add_strbuf(f, buf);
add_strbuf(f, v->u.ob->name);
add_strbuf(f, "$");
break;
#if 0
case T_FUNCTION:
add_strbuf(f, "&FUNCTION&"); /* XXX function */
break;
#endif
default:
add_strbuf(f, "0");
break;
}
depth--;
}
/*
* Save an object to a file.
* The routine checks with the function "valid_write()" in /obj/master.c
* to assertain that the write is legal.
*/
void save_object(struct object *ob, char *file)
{
char *name, *tmp_name;
size_t len;
int i, j;
FILE *f;
int failed = 0;
struct savebuf sbuf;
/* struct svalue *v; */
if (ob->flags & O_DESTRUCTED)
return;
file = check_valid_path(file, ob, "save_object", 1);
if (file == 0)
error("Illegal use of save_object()\n");
len = strlen(file);
name = alloca(len + 2 + 1);
(void)strcpy(name, file);
(void)strcat(name, ".o");
/*
* Write the save-files to different directories, just in case
* they are on different file systems.
*/
tmp_name = alloca(len + 2 + 4 + 1);
(void)sprintf(tmp_name, "%s.tmp", name);
f = fopen(tmp_name, "w");
if (s_flag)
num_filewrite++;
if (f == 0) {
error("Could not open %s for a save.\n", tmp_name);
}
failed = 0;
sbuf.size = 0;
sbuf.max_size = 80;
sbuf.buf = xalloc(80);
sbuf.f = f;
for (j = 0; j < (int)ob->prog->num_inherited; j++)
{
struct program *prog = ob->prog->inherit[j].prog;
if (ob->prog->inherit[j].type & TYPE_MOD_SECOND ||
prog->num_variables == 0)
continue;
for (i = 0; i < (int)prog->num_variables; i++) {
struct svalue *v =
&ob->variables[i + ob->prog->inherit[j].variable_index_offset];
if (ob->prog->inherit[j].prog->variable_names[i].type & TYPE_MOD_STATIC)
continue;
if (v->type == T_NUMBER || v->type == T_STRING || v->type == T_POINTER
|| v->type == T_MAPPING || v->type == T_OBJECT || v->type == T_FLOAT) { /* XXX function */
add_strbuf(&sbuf, ob->prog->inherit[j].prog->variable_names[i].name);
add_strbuf(&sbuf, " ");
save_one(&sbuf, v);
add_strbuf(&sbuf, "\n");
}
}
}
fwrite(sbuf.buf, sbuf.size, 1, f);
free(sbuf.buf);
if (fclose(f) == EOF)
failed = 1;
if (failed)
{
(void)unlink(tmp_name);
error("Failed to save to file. Disk could be full.\n");
}
if (rename(tmp_name, name) == -1)
{
(void)unlink(tmp_name);
perror(name);
(void)printf("Failed to link %s to %s\n", tmp_name, name);
error("Failed to save object !\n");
}
}
/*
* Save an object to a mapping.
*/
struct mapping *
m_save_object(struct object *ob)
{
int i, j;
struct mapping *ret;
struct svalue s = const0;
if (ob->flags & O_DESTRUCTED)
return allocate_map(0); /* XXX is this right /LA */
ret = allocate_map((short)(ob->prog->num_variables +
ob->prog->inherit[ob->prog->num_inherited - 1].
variable_index_offset));
for (j = 0; j < (int)ob->prog->num_inherited; j++)
{
struct program *prog = ob->prog->inherit[j].prog;
if (ob->prog->inherit[j].type & TYPE_MOD_SECOND ||
prog->num_variables == 0)
continue;
for (i = 0; i < (int)prog->num_variables; i++)
{
struct svalue *v =
&ob->variables[i + ob->prog->inherit[j].
variable_index_offset];
if (prog->variable_names[i].type & TYPE_MOD_STATIC)
continue;
free_svalue(&s);
s.type = T_STRING;
s.string_type = STRING_MSTRING;
s.u.string = make_mstring(prog->variable_names[i].name);
assign_svalue(get_map_lvalue(ret, &s, 1), v);
}
}
free_svalue(&s);
return ret;
}
void
save_map(struct object *ob, struct mapping *map, char *file)
{
char *name, *tmp_name;
struct apair *i;
size_t len;
int j;
FILE *f;
struct savebuf sbuf;
int failed = 0;
/* struct svalue *v; */
file = check_valid_path(file, ob, "save_map", 1);
if (file == 0)
error("Illegal use of save_map()\n");
for (j = 0; j < map->size; j++)
{
for (i = map->pairs[j]; i; i = i->next) {
if (i->arg.type != T_STRING)
error("Non-string index in mapping\n");
if (strpbrk(i->arg.u.string, " \n\r\t\f\v\b") != NULL)
error("Mapping index cannot have whitespace\n");
}
}
len = strlen(file);
name = alloca(len + 2 + 1);
(void)strcpy(name, file);
(void)strcat(name, ".o");
/*
* Write the save-files to different directories, just in case
* they are on different file systems.
*/
tmp_name = alloca(len + 2 + 4 + 1);
(void)sprintf(tmp_name, "%s.tmp", name);
f = fopen(tmp_name, "w");
if (s_flag)
num_filewrite++;
if (f == 0) {
error("Could not open %s for a save.\n", tmp_name);
}
failed = 0;
sbuf.size = 0;
sbuf.max_size = 80;
sbuf.buf = xalloc(80);
sbuf.f = f;
for (j = 0; j < map->size; j++)
{
for (i = map->pairs[j]; i; i = i->next) {
struct svalue *v =
&i->val;
if (i->arg.type != T_STRING)
continue;
if (v->type == T_NUMBER || v->type == T_STRING || v->type == T_POINTER
|| v->type == T_MAPPING || v->type == T_OBJECT || v->type == T_FLOAT) { /* XXX function */
add_strbuf(&sbuf, i->arg.u.string);
add_strbuf(&sbuf, " ");
save_one(&sbuf, v);
add_strbuf(&sbuf, "\n");
}
}
}
fwrite(sbuf.buf, sbuf.size, 1, f);
free(sbuf.buf);
if (fclose(f) == EOF)
failed = 1;
if (failed)
{
(void)unlink(tmp_name);
error("Failed to save to file. Disk could be full.\n");
}
if (rename(tmp_name, name) == -1)
{
(void)unlink(tmp_name);
perror(name);
(void)printf("Failed to link %s to %s\n", tmp_name, name);
error("Failed to save mapping !\n");
}
}
char *
valtostr(struct svalue *sval)
{
struct savebuf sbuf;
sbuf.buf = xalloc(80);
sbuf.size = 0;
sbuf.max_size = 80;
sbuf.buf[0] = 0;
sbuf.f = NULL;
save_one(&sbuf, sval);
return sbuf.buf;
}
#define BIG 1000
int restore_one (struct svalue *, char **);
static struct vector *
restore_array(char **str)
{
struct svalue *tmp;
int nmax = BIG;
int i, k;
tmp = (struct svalue *)alloca(nmax * sizeof(struct svalue));
for(k = 0; k < nmax; k++)
tmp[k] = const0;
i = 0;
for(;;)
{
if (**str == '}')
{
if (*++*str == ')')
{
struct vector *v;
++*str;
v = allocate_array(i);
(void)memcpy((char *)&v->item[0], (char *)tmp, sizeof(struct svalue) * i);
return v;
}
else
break;
}
else
{
if (i >= nmax)
{
struct svalue *ntmp;
ntmp = (struct svalue *)alloca(nmax * 2 * sizeof(struct svalue));
(void)memcpy((char *)ntmp, (char *)tmp, sizeof(struct svalue) * nmax);
tmp = ntmp;
nmax *= 2;
for(k = i; k < nmax; k++)
tmp[k] = const0;
}
if (!restore_one(&tmp[i++], str))
break;
if (*(*str)++ != ',')
break;
}
}
for (i--; i >= 0; i--)
free_svalue(&(tmp[i]));
return 0;
}
static struct mapping *
restore_mapping(char **str)
{
struct mapping *m;
m = allocate_map(0);
for(;;)
{
if (**str == ']')
{
if (*++*str == ')')
{
++*str;
return m;
}
else
break;
}
else
{
struct svalue arg, *val;
arg = const0;
if (!restore_one(&arg, str))
break;
if (*(*str)++ != ':')
{
free_svalue(&arg);
break;
}
val = get_map_lvalue(m, &arg, 1);
free_svalue(&arg);
if (!restore_one(val, str) ||
*(*str)++ != ',')
break;
}
}
free_mapping(m);
return 0;
}
/* XXX function */
int
restore_one(struct svalue *v, char **msp)
{
char *q, *p, *s;
s = *msp;
switch(*s) {
case '(':
switch(*++s)
{
case '[':
{
struct mapping *map;
s++;
map = restore_mapping(&s);
if (!map) {
return 0;
}
free_svalue(v);
v->type = T_MAPPING;
v->u.map = map;
}
break;
case '{':
{
struct vector *vec;
s++;
vec = restore_array(&s);
if (!vec) {
return 0;
}
free_svalue(v);
v->type = T_POINTER;
v->u.vec = vec;
}
break;
default:
return 0;
}
break;
case '"':
for(p = s+1, q = s; *p && *p != '"'; p++)
{
if (*p == '\\') {
switch (*++p) {
case 'n':
*q++ = '\n';
break;
default:
*q++ = *p;
break;
}
} else {
/* Have to be able to restore old format... */
if (*p == '\r')
*q++ = '\n';
else
*q++ = *p;
}
}
*q = 0;
if (*p != '"')
return 0;
free_svalue(v);
v->type = T_STRING;
v->string_type = STRING_MSTRING;
v->u.string = make_mstring(s);
s = p+1;
break;
case '$':
{
int ct;
struct object *ob;
char name[1024];
char *b = strchr(s + 1,'$');
*name = '\0';
if (b == NULL)
return 0;
if (sscanf(s,"$%d@%[^$ \n\t]$",&ct,name) != 2)
return 0;
ob = find_object2(name);
free_svalue(v);
if (ob && ob->created == ct)
{
v->type = T_OBJECT;
v->u.ob = ob;
add_ref(ob,"restore_one");
}
else
{
v->type = T_NUMBER;
v->u.number = 0;
}
s = b + 1;
}
break;
case '#':
{
double f;
char *b = strchr(s + 1, '#');
if (b == NULL)
return 0;
f = strtod(s + 1, NULL);
free_svalue(v);
v->type = T_FLOAT;
v->u.real = f;
s = b + 1;
}
break;
default:
if (!isdigit(*s) && *s != '-')
return 0;
free_svalue(v);
v->type = T_NUMBER;
v->u.number = atoll(s);
while(isdigit(*s) || *s == '-')
s++;
break;
}
*msp = s;
return 1;
}
int
restore_object(struct object *ob, char *file)
{
char *name, var[100], *buff, *space;
size_t len;
FILE *f;
struct object *save = current_object;
struct stat st;
int p;
if (current_object != ob)
fatal("Bad argument to restore_object()\n");
if (ob->flags & O_DESTRUCTED)
return 0;
file = check_valid_path(file, ob, "restore_object", 0);
if (file == 0)
error("Illegal use of restore_object()\n");
len = strlen(file);
name = alloca(len + 3);
(void)strcpy(name, file);
if (name[len-2] == '.' && name[len-1] == 'c')
name[len-1] = 'o';
else
(void)strcat(name, ".o");
f = fopen(name, "r");
if (s_flag)
num_fileread++;
if (!f || fstat(fileno(f), &st) == -1) {
if (f)
(void)fclose(f);
return 0;
}
if (st.st_size == 0) {
(void)fclose(f);
return 0;
}
buff = xalloc((size_t)st.st_size + 1);
current_object = ob;
for (;;) {
struct svalue *v;
if (fgets(buff, (int)st.st_size + 1, f) == 0)
break;
/* Remember that we have a newline at end of buff ! */
space = strchr(buff, ' ');
if (space == 0 || space - buff >= sizeof (var)) {
(void)fclose(f);
free(buff);
error("Illegal format when restoring %s.\n", file);
}
(void)strncpy(var, buff, (size_t)(space - buff));
var[space - buff] = '\0';
p = find_status(ob->prog, var, TYPE_MOD_STATIC);
if (p == -1)
continue;
v = &ob->variables[p];
space++;
if (!restore_one(v, &space)) {
(void)fclose(f);
free(buff);
error("Illegal format when restoring %s from %s.\n", var, file);
}
}
current_object = save;
if (d_flag & DEBUG_RESTORE)
debug_message("Object %s restored from %s.\n", ob->name, file);
free(buff);
(void)fclose(f);
return 1;
}
int
m_restore_object(struct object *ob, struct mapping *map)
{
int p;
int i;
struct apair *j;
if (ob->flags & O_DESTRUCTED)
return 0;
for (i = 0; i < map->size; i++)
{
for (j = map->pairs[i]; j ; j = j->next)
{
if (j->arg.type != T_STRING)
continue;
if ((p = find_status(ob->prog, j->arg.u.string, TYPE_MOD_STATIC))
== -1)
continue;
assign_svalue(&ob->variables[p], &j->val);
}
}
return 1;
}
void
restore_map(struct object *ob, struct mapping *map, char *file)
{
char *name, *buff, *space;
size_t len;
FILE *f;
struct object *save = current_object;
struct stat st;
if (current_object != ob)
fatal("Bad argument to restore_map()\n");
if (ob->flags & O_DESTRUCTED)
return;
file = check_valid_path(file, ob, "restore_map", 0);
if (file == 0)
error("Illegal use of restore_map()\n");
len = strlen(file);
name = alloca(len + 2 + 1);
(void)strcpy(name, file);
if (name[len-2] == '.' && name[len-1] == 'c')
name[len-1] = 'o';
else
(void)strcat(name, ".o");
f = fopen(name, "r");
if (s_flag)
num_fileread++;
if (!f || fstat(fileno(f), &st) == -1) {
if (f)
(void)fclose(f);
return;
}
if (st.st_size == 0) {
(void)fclose(f);
return;
}
buff = xalloc((size_t)st.st_size + 1);
for (;;) {
struct svalue v;
v.type = T_STRING;
v.string_type = STRING_MSTRING;
if (fgets(buff, (int)st.st_size + 1, f) == 0)
break;
/* Remember that we have a newline at end of buff ! */
space = strchr(buff, ' ');
if (space == 0) {
(void)fclose(f);
free(buff);
error("Illegal format when restoring %s.\n", file);
}
*space++ = '\0';
v.u.string = make_mstring(buff);
if (!restore_one(get_map_lvalue(map,&v,1), &space)) {
(void)fclose(f);
free(buff);
free_svalue(&v);
error("Illegal format when restoring %s.\n", file);
}
free_svalue(&v);
}
current_object = save;
free(buff);
(void)fclose(f);
}
void
free_object(struct object *ob, char *from)
{
if (d_flag & DEBUG_OB_REF)
(void)printf("Subtr ref to ob %s: %d (%s)\n", ob->name,
ob->ref, from);
if (!ob->ref || --ob->ref > 0)
return;
if (!(ob->flags & O_DESTRUCTED))
{
/* This is fatal, and should never happen. */
fatal("FATAL: Object %p %s ref count 0, but not destructed (from %s).\n",
ob, ob->name, from);
}
if (ob->interactive)
fatal("Tried to free an interactive object.\n");
/*
* If the program is freed, then we can also free the variable
* declarations.
*/
if (ob->name) {
if (lookup_object_hash(ob->name) == ob)
fatal("Freeing object %s but name still in name table\n", ob->name);
free(ob->name);
ob->name = 0;
}
tot_alloc_object--;
tot_alloc_dest_object--;
tot_removed_object++;
free((char *)ob);
tot_alloc_object_size -= sizeof (struct object);
}
void
add_ref(struct object *ob, char *from)
{
INCREF(ob->ref);
if (d_flag & DEBUG_OB_REF)
(void)printf("Add reference to object %s: %d (%s)\n", ob->name,
ob->ref, from);
}
/*
* Allocate an empty object, and set all variables to 0. Note that a
* 'struct object' already has space for one variable. So, if no variables
* are needed, we allocate a space that is smaller than 'struct object'. This
* unused (last) part must of course (and will not) be referenced.
*/
struct object *
get_empty_object()
{
static struct object NULL_object;
struct object *ob;
int size = sizeof (struct object);
tot_alloc_object++;
tot_alloc_object_size += size;
ob = (struct object *)xalloc(sizeof(struct object));
/* marion
* Don't initialize via memset, this is incorrect. E.g. the bull machines
* have a (char *)0 which is not zero. We have structure assignment, so
* use it.
*/
*ob = NULL_object;
ob->ref = 1;
return ob;
}
#ifdef DEALLOCATE_MEMORY_AT_SHUTDOWN
static void
force_remove_object(struct object *ob)
{
remove_object_from_stack(ob);
remove_object_hash(ob);
remove_task(ob->callout_task);
delete_all_calls(ob);
ob->next_all = obj_list_destruct;
ob->prev_all = NULL;
obj_list_destruct = ob;
ob->flags |= O_DESTRUCTED;
tot_alloc_dest_object++;
}
void
remove_all_objects()
{
extern struct object *master_ob, *vbfc_object, *auto_ob, *simul_efun_ob;
struct gdexception exception_frame;
struct object *ob;
int n;
exception_frame.e_exception = NULL;
exception_frame.e_catch = 0;
for (;;) {
ob = obj_list;
n = 0;
while (ob == master_ob ||
ob == vbfc_object ||
ob == auto_ob ||
ob == simul_efun_ob) {
ob = ob->next_all;
if (n++ > 3)
break;
}
if (n > 3 || ob == 0)
break;
if (setjmp(exception_frame.e_context))
clear_state();
else {
exception = &exception_frame;
ob->prog->flags &= ~PRAGMA_RESIDENT;
destruct_object(ob);
exception = NULL;
}
}
/*
* In case we have objects referenced through
* closure cache
*/
clear_closure_cache();
/*
* Remove VBFC object
*/
force_remove_object(vbfc_object);
free_object(vbfc_object, "remove_all_objects");
vbfc_object = NULL;
/*
* Remove master object
*/
force_remove_object(master_ob);
free_object(master_ob, "remove_all_objects");
master_ob = NULL;
/*
* Remove simul_efun object
*/
force_remove_object(simul_efun_ob);
free_object(simul_efun_ob, "remove_all_objects");
simul_efun_ob = NULL;
/*
* Remove auto object
*/
force_remove_object(auto_ob);
free_object(auto_ob, "remove_all_objects");
auto_ob = NULL;
}
#endif
#if 0
/*
* For debugging purposes.
*/
void
check_ob_ref(struct object *ob, char *from)
{
struct object *o;
int i;
for (o = obj_list, i=0; o; o = o->next_all) {
if (o->inherit == ob)
i++;
}
if (i+1 > ob->ref) {
fatal("FATAL too many references to inherited object %s (%d) from %s.\n",
ob->name, ob->ref, from);
if (current_object)
(void)fprintf(stderr, "current_object: %s\n", current_object->name);
for (o = obj_list; o; o = o->next_all) {
if (o->inherit != ob)
continue;
(void)fprintf(stderr, " %s\n", ob->name);
}
}
}
#endif /* 0 */
static struct object *hashed_living[LIVING_HASH_SIZE];
static int num_living_names, num_searches = 1, search_length = 1;