/* * 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); }