/*
* FILES3.C:
*
* File I/O Routines.
*
* Copyright (C) 1991 Brett J. Vickers
*
*/
#include "mstruct.h"
#include "mextern.h"
/************************************************************************/
/* write_obj_to_mem */
/************************************************************************/
/* Save an object to a block of memory. */
/* This function recursively saves the items that are contained inside */
/* the object as well. If perm_only != 0 then only permanent objects */
/* within the object are saved with it. This function returns the */
/* number of bytes that were written. */
int write_obj_to_mem(buf, obj_ptr, perm_only)
char *buf;
object *obj_ptr;
char perm_only;
{
int n, cnt, cnt2=0, error=0;
char *bufstart;
otag *op;
bufstart = buf;
memcpy(buf, obj_ptr, sizeof(object));
buf += sizeof(object);
cnt = count_obj(obj_ptr, perm_only);
memcpy(buf, &cnt, sizeof(int));
buf += sizeof(int);
if(cnt > 0) {
op = obj_ptr->first_obj;
while(op) {
if(!perm_only || (perm_only &&
(F_ISSET(op->obj, OPERMT) ||
F_ISSET(op->obj, OPERM2)))) {
if((n = write_obj_to_mem(buf,
op->obj, perm_only)) < 0)
error = 1;
else
buf += n;
cnt2++;
}
op = op->next_tag;
}
}
if(cnt != cnt2 || error)
return(-1);
else
return(buf - bufstart);
}
/************************************************************************/
/* write_crt_to_mem */
/************************************************************************/
/* Save a creature to memory. This function */
/* also saves all the items the creature is holding. If perm_only != 0 */
/* then only those items which the creature is carrying that are */
/* permanent will be saved. */
int write_crt_to_mem(buf, crt_ptr, perm_only)
char *buf;
creature *crt_ptr;
char perm_only;
{
int n, cnt, cnt2=0, error=0;
char *bufstart;
otag *op;
bufstart = buf;
memcpy(buf, crt_ptr, sizeof(creature));
buf += sizeof(creature);
cnt = count_inv(crt_ptr, perm_only);
memcpy(buf, &cnt, sizeof(int));
buf += sizeof(int);
if(cnt > 0) {
op = crt_ptr->first_obj;
while(op) {
if(!perm_only || (perm_only &&
(F_ISSET(op->obj, OPERMT) ||
F_ISSET(op->obj, OPERM2)))) {
if((n = write_obj_to_mem(buf, op->obj,
perm_only)) < 0)
error = 1;
else
buf += n;
cnt2++;
}
op = op->next_tag;
}
}
if(cnt != cnt2 || error)
return(-1);
else
return(buf - bufstart);
}
/************************************************************************/
/* read_obj_from_mem */
/************************************************************************/
/* Loads the object from memory, returns the number of bytes read, */
/* and also loads every object which it might contain. Returns -1 if */
/* there was an error. */
int read_obj_from_mem(buf, obj_ptr)
char *buf;
object *obj_ptr;
{
int n, cnt, error=0;
char *bufstart;
otag *op;
otag **prev;
object *obj;
bufstart = buf;
memcpy(obj_ptr, buf, sizeof(object));
buf += sizeof(object);
obj_ptr->first_obj = 0;
obj_ptr->parent_obj = 0;
obj_ptr->parent_rom = 0;
obj_ptr->parent_crt = 0;
if(obj_ptr->shotscur > obj_ptr->shotsmax)
obj_ptr->shotscur = obj_ptr->shotsmax;
memcpy(&cnt, buf, sizeof(int));
buf += sizeof(int);
prev = &obj_ptr->first_obj;
while(cnt > 0) {
cnt--;
op = (otag *)malloc(sizeof(otag));
if(op) {
obj = (object *)malloc(sizeof(object));
if(obj) {
if((n = read_obj_from_mem(buf, obj)) < 0)
error = 1;
else
buf += n;
obj->parent_obj = obj_ptr;
op->obj = obj;
op->next_tag = 0;
*prev = op;
prev = &op->next_tag;
}
else
merror("read_obj", FATAL);
}
else
merror("read_obj", FATAL);
}
if(error)
return(-1);
else
return(buf - bufstart);
}
/************************************************************************/
/* read_crt_from_mem */
/************************************************************************/
/* Loads a creature from memory & returns bytes read. The creature is */
/* loaded at the mem location specified by the second parameter. In */
/* addition, all the creature's objects have memory allocated for them */
/* and are loaded as well. Returns -1 on fail. */
int read_crt_from_mem(buf, crt_ptr)
char *buf;
creature *crt_ptr;
{
int n, cnt, error=0;
char *bufstart;
otag *op;
otag **prev;
object *obj;
bufstart = buf;
memcpy(crt_ptr, buf, sizeof(creature));
buf += sizeof(creature);
crt_ptr->first_obj = 0;
crt_ptr->first_fol = 0;
crt_ptr->first_enm = 0;
crt_ptr->parent_rom = 0;
crt_ptr->following = 0;
for(n=0; n<20; n++)
crt_ptr->ready[n] = 0;
if(crt_ptr->mpcur > crt_ptr->mpmax)
crt_ptr->mpcur = crt_ptr->mpmax;
if(crt_ptr->hpcur > crt_ptr->hpmax)
crt_ptr->hpcur = crt_ptr->hpmax;
memcpy(&cnt, buf, sizeof(int));
buf += sizeof(int);
prev = &crt_ptr->first_obj;
while(cnt > 0) {
cnt--;
op = (otag *)malloc(sizeof(otag));
if(op) {
obj = (object *)malloc(sizeof(object));
if(obj) {
if((n = read_obj_from_mem(buf, obj)) < 0)
error = 1;
else
buf += n;
obj->parent_crt = crt_ptr;
op->obj = obj;
op->next_tag = 0;
*prev = op;
prev = &op->next_tag;
}
else
merror("read_crt", FATAL);
}
else
merror("read_crt", FATAL);
}
if(error)
return(-1);
else
return(buf - bufstart);
}