3 * Structs for objects on the map and their type definitions, and routines to
4 * initialize these and load and save them from/to files.
10 #include <stdio.h> /* for FILE typedef */
11 #include <stdint.h> /* for uint8_t */
12 #include "yx_uint16.h" /* for yx_uint16 coordinates */
18 struct MapObj * next; /* pointer to next one in map object chain */
19 struct MapObj * owns; /* chain of map objects owned / in inventory */
20 uint8_t id; /* individual map object's unique identifier */
21 uint8_t type; /* ID of appropriate map object definition */
22 uint8_t lifepoints; /* 0: object is inanimate; >0: hitpoints */
23 struct yx_uint16 pos; /* coordinate on map */
24 uint8_t command; /* command map object tries to realize now*/
25 uint8_t arg; /* optional field for command argument */
26 uint8_t progress; /* turns already passed to realize .command */
31 struct MapObjDef * next;
32 uint8_t id; /* unique identifier of map object type */
33 uint8_t corpse_id; /* id of type to change into upon destruction */
34 char char_on_map; /* map object symbol to appear on map */
35 char * name; /* string to describe object in game log*/
36 uint8_t lifepoints; /* default value for map object lifepoints member */
41 /* Initialize map object defnitions chain from file at path "filename". */
42 extern void init_map_object_defs(char * filename);
44 /* Free map object definitions chain starting at "mod_start". */
45 extern void free_map_object_defs(struct MapObjDef * mod_start);
47 /* Add new object(s) ("n": how many?) of "type" to map on random position(s).
48 * New animate objects are never placed in the same square with other animated
51 extern void add_map_object(uint8_t type);
52 extern void add_map_objects(uint8_t type, uint8_t n);
54 /* Write map objects chain to "file". */
55 extern void write_map_objects(FILE * file);
57 /* Read from "file" map objects chain; use "line" as char array for fgets() and
58 * expect strings of max. "linemax" length.
60 extern void read_map_objects(FILE * file, char * line, int linemax);
62 /* Free map objects in map object chain starting at "mo_start. */
63 extern void free_map_objects(struct MapObj * mo_start);
65 /* Move object of "id" from "source" inventory to "target" inventory. */
66 extern void own_map_object(struct MapObj ** target, struct MapObj ** source,
69 /* Get pointer to the MapObj struct that represents the player. */
70 extern struct MapObj * get_player();
72 /* Get pointer to the map object definition of identifier "def_id". */
73 extern struct MapObjDef * get_map_object_def(uint8_t id);
75 /* Move not only "mo" to "pos", but also all map objects owned by it. */
76 extern void set_object_position(struct MapObj * mo, struct yx_uint16 pos);