+/* map_objects.c */
+
#include "map_objects.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include "readwrite.h"
-#include "misc.h"
-#include "main.h"
-
-static struct MapObj * get_next_map_obj (void *, char *, size_t, struct MapObj *);
-
-extern void init_map_object_defs (struct World * world, char * filename) {
-// Initialize map object definitions from file at path "filename".
- world->item_def = 0;
- world->monster_def = 0;
- FILE * file = fopen(filename, "r");
- uint16_t linemax;
- textfile_sizes (file, &linemax, NULL);
- struct MapObjDef mod;
- struct ItemDef id;
- struct MonsterDef md;
- struct ItemDef * * p_p_id = &world->item_def;
- struct MonsterDef * * p_p_md = &world->monster_def;
- char * defline = malloc(linemax);
- char * line_p;
- char m_or_i;
- while (fgets (defline, linemax, file)) {
- mod.next = 0;
- mod.id = atoi(defline);
- line_p = strchr(defline, ' ') + 1;
- m_or_i = * line_p;
- mod.mapchar = * (line_p + 2);
- if ('i' == m_or_i)
- line_p = line_p + 5;
- else {
- md.hitpoints_start = atoi (line_p + 4);
- line_p = strchr (line_p + 4, ' ') + 1; }
- mod.desc = calloc (strlen (line_p), sizeof(char));
- memcpy (mod.desc, line_p, strlen(line_p) - 1);
- if ('i' == m_or_i) {
- id.map_obj_def = mod;
- * p_p_id = malloc (sizeof (struct ItemDef));
- * * p_p_id = id;
- p_p_id = (struct ItemDef * *) * p_p_id; }
- else {
- md.map_obj_def = mod;
- * p_p_md = malloc (sizeof (struct MonsterDef));
- * * p_p_md = md;
- p_p_md = (struct MonsterDef * *) * p_p_md; } }
- free(defline);
- fclose(file); };
-
-extern void write_map_objects_monsterdata (void * start, FILE * file) {
-// Write to file data specific to map objects of type monster.
- struct Monster * m = (struct Monster *) start;
- fputc(m->hitpoints, file); }
-
-extern void write_map_objects (void * start, FILE * file, void (* w_typedata) (void *, FILE *) ) {
-// Write into file the map object chain starting at start, use write_type() for object-type specific data.
- struct MapObj * map_obj;
- for (map_obj = start; map_obj != 0; map_obj = map_obj->next) {
- write_uint16_bigendian(map_obj->pos.y + 1, file);
- write_uint16_bigendian(map_obj->pos.x + 1, file);
- fputc(map_obj->type, file);
- if (w_typedata)
- w_typedata (map_obj, file); }
- write_uint16_bigendian(0, file); }
-
-extern void read_map_objects_monsterdata (void * start, FILE * file) {
-// Read from file data speciifc to map objects of type monster.
+#include <stdlib.h> /* for malloc(), calloc(), free(), atoi() */
+#include <stdio.h> /* for FILE typedef */
+#include <string.h> /* for strchr(), strlen(), memcpy() */
+#include "readwrite.h" /* for all the map object (def) loading/saving */
+#include "misc.h" /* for textfile_sizes(), find_passable_pos() */
+#include "main.h" /* for World struct */
+
+
+
+/* Return pointer to newly allocated map object struct of size "size". If first
+ * in map object chain ("first" pointing to !0), point "start" to it.
+ */
+static struct MapObj * get_next_map_obj(void * start, char * first,
+ size_t size, struct MapObj * map_obj);
+
+
+
+static struct MapObj * get_next_map_obj(void * start, char * first,
+ size_t size, struct MapObj * map_obj)
+{
+ if (* first)
+ {
+ struct MapObj * * z = start;
+ map_obj = malloc(size);
+ * z = map_obj;
+ * first = 0;
+ }
+ else
+ {
+ map_obj->next = malloc(size);
+ map_obj = map_obj->next;
+ }
+ return map_obj;
+}
+
+
+
+extern void init_map_object_defs(struct World * world, char * filename)
+{
+ world->item_def = 0;
+ world->monster_def = 0;
+ FILE * file = fopen(filename, "r");
+ uint16_t linemax;
+ textfile_sizes (file, &linemax, NULL);
+ struct MapObjDef mod;
+ struct ItemDef id;
+ struct MonsterDef md;
+ struct ItemDef * * p_p_id = &world->item_def;
+ struct MonsterDef * * p_p_md = &world->monster_def;
+ char * defline = malloc(linemax);
+ char * line_p;
+ char m_or_i;
+ while (fgets(defline, linemax, file))
+ {
+ mod.next = 0;
+ mod.id = atoi(defline);
+ line_p = strchr(defline, ' ') + 1;
+ m_or_i = * line_p;
+ mod.mapchar = * (line_p + 2);
+ if ('i' == m_or_i)
+ {
+ line_p = line_p + 5;
+ }
+ else
+ {
+ md.hitpoints_start = atoi (line_p + 4);
+ line_p = strchr (line_p + 4, ' ') + 1;
+ }
+ mod.desc = calloc (strlen (line_p), sizeof(char));
+ memcpy (mod.desc, line_p, strlen(line_p) - 1);
+ if ('i' == m_or_i)
+ {
+ id.map_obj_def = mod;
+ * p_p_id = malloc(sizeof(struct ItemDef));
+ * * p_p_id = id;
+ p_p_id = (struct ItemDef * *) * p_p_id;
+ }
+ else
+ {
+ md.map_obj_def = mod;
+ * p_p_md = malloc(sizeof(struct MonsterDef));
+ * * p_p_md = md;
+ p_p_md = (struct MonsterDef * *) * p_p_md;
+ }
+ }
+ free(defline);
+ fclose(file);
+};
+
+
+
+extern void write_map_objects(void * start, FILE * file,
+ void (* w_typedata) (void *, FILE *) )
+{
+ struct MapObj * map_obj;
+ for (map_obj = start; map_obj != 0; map_obj = map_obj->next)
+ {
+ write_uint16_bigendian(map_obj->pos.y + 1, file);
+ write_uint16_bigendian(map_obj->pos.x + 1, file);
+ fputc(map_obj->type, file);
+ if (w_typedata)
+ {
+ w_typedata (map_obj, file);
+ }
+ }
+ write_uint16_bigendian(0, file);
+}
+
+
+
+extern void read_map_objects (void * start, FILE * file, size_t size,
+ void (* r_typedata) (void *, FILE *) )
+{
+ struct MapObj * map_obj;
+ uint16_t test;
+ char first = 1;
+ while (1)
+ {
+ test = read_uint16_bigendian(file);
+ if (0 == test)
+ {
+ break;
+ }
+ map_obj = get_next_map_obj(start, &first, size, map_obj);
+ map_obj->pos.y = test - 1;
+ map_obj->pos.x = read_uint16_bigendian(file) - 1;
+ map_obj->type = fgetc(file);
+ if (r_typedata)
+ {
+ r_typedata(map_obj, file);
+ }
+ }
+ if (!first)
+ {
+ map_obj->next = 0;
+ }
+}
+
+
+
+extern void write_map_objects_monsterdata(void * start, FILE * file)
+{
struct Monster * m = (struct Monster *) start;
- m->hitpoints = fgetc(file); }
-
-static struct MapObj * get_next_map_obj (void * start, char * first, size_t size, struct MapObj * map_obj) {
-// Return pointer to map object of "size". If first in chain ("first" pointing to !0), point "start" to it.
- if (* first) {
- struct MapObj * * z = start;
- map_obj = malloc(size);
- * z = map_obj;
- * first = 0; }
- else {
- map_obj->next = malloc(size);
- map_obj = map_obj->next; }
- return map_obj; }
-
-extern void read_map_objects (void * start, FILE * file, size_t size, void (* r_typedata) (void *, FILE *) ) {
-// Read from file chain of map objects starting at start, use r_typedata() for object-type specific data.
- struct MapObj * map_obj;
- uint16_t test;
- char first = 1;
- while (1) {
- test = read_uint16_bigendian(file);
- if (0 == test)
- break;
- map_obj = get_next_map_obj(start, &first, size, map_obj);
- map_obj->pos.y = test - 1;
- map_obj->pos.x = read_uint16_bigendian(file) - 1;
- map_obj->type = fgetc(file);
- if (r_typedata)
- r_typedata (map_obj, file); }
- if (!first)
- map_obj->next = 0; }
-
-extern void build_map_objects_monsterdata (struct MapObjDef * map_obj_def, void * start) {
-// Build data specific to map objects of type monster.
+ fputc(m->hitpoints, file);
+}
+
+
+
+extern void read_map_objects_monsterdata (void * start, FILE * file)
+{
struct Monster * m = (struct Monster *) start;
- m->map_obj.type = map_obj_def->id;
- struct MonsterDef * md = (struct MonsterDef *) map_obj_def;
- m->hitpoints = md->hitpoints_start; }
+ m->hitpoints = fgetc(file);
+}
+
+
+
+extern void * build_map_objects(struct World * world, void * start, char def_id,
+ unsigned char n, size_t size,
+ void (* b_typedata) (struct MapObjDef *, void *))
+{
+ unsigned char i;
+ struct MapObj * mo;
+ char first = 1;
+ struct MapObjDef * mod = get_map_obj_def(world, def_id);
+ for (i = 0; i < n; i++)
+ {
+ mo = get_next_map_obj(start, &first, size, mo);
+ mo->pos = find_passable_pos(world->map);
+ b_typedata(mod, mo);
+ }
+ if (!first)
+ {
+ mo->next = 0;
+ }
+ return &mo->next;
+}
-extern void build_map_objects_itemdata (struct MapObjDef * map_obj_def, void * start) {
-// Build data speciifc to map objects of type data.
+
+
+extern void build_map_objects_itemdata(struct MapObjDef * map_obj_def,
+ void * start)
+{
struct Item * i = (struct Item *) start;
- i->map_obj.type = map_obj_def->id; }
-
-extern void * build_map_objects (struct World * world, void * start, char def_id, unsigned char n,
- size_t size, void (* b_typedata) (struct MapObjDef *, void *)) {
-// Build chain of n map objects starting at start, use f() for object-specific data.
- unsigned char i;
- struct MapObj * mo;
- char first = 1;
- struct MapObjDef * mod = get_map_obj_def (world, def_id);
- for (i = 0; i < n; i++) {
- mo = get_next_map_obj(start, &first, size, mo);
- mo->pos = find_passable_pos(world->map);
- b_typedata (mod, mo); }
- if (!first)
- mo->next = 0;
- return &mo->next; }
-
-extern struct MapObjDef * get_map_obj_def (struct World * world, char def_id) {
-// Get pointer to the map object definition with id "def_id".
- struct MapObjDef * d = NULL;
- for (d = (struct MapObjDef *) world->monster_def; d->id != def_id && 0 != d->next; d = d->next);
- if (d->id != def_id)
- for (d = (struct MapObjDef *) world->item_def; d->id != def_id && 0 != d->next; d = d->next);
- return d; }
+ i->map_obj.type = map_obj_def->id;
+}
+
+
+
+extern void build_map_objects_monsterdata(struct MapObjDef * map_obj_def,
+ void * start)
+{
+ struct Monster * m = (struct Monster *) start;
+ m->map_obj.type = map_obj_def->id;
+ struct MonsterDef * md = (struct MonsterDef *) map_obj_def;
+ m->hitpoints = md->hitpoints_start;
+}
+
+
+
+extern struct MapObjDef * get_map_obj_def (struct World * world, char def_id)
+{
+ struct MapObjDef * d = NULL;
+ for (d = (struct MapObjDef *) world->monster_def;
+ d->id != def_id && 0 != d->next;
+ d = d->next);
+ if (d->id != def_id)
+ {
+ for (d = (struct MapObjDef *) world->item_def;
+ d->id != def_id && 0 != d->next;
+ d = d->next);
+ }
+ return d;
+}
+/* map_objects.h
+ *
+ * Structs for objects on the map and their type definitions, and routines to
+ * initialize these and load and save them from/to files.
+ */
+
#ifndef MAP_OBJECTS_H
#define MAP_OBJECTS_H
-#include <stdio.h>
-#include "yx_uint16.h"
+
+#include <stdio.h> /* for FILE typedef */
+#include "yx_uint16.h" /* for yx_uint16 coordinates */
struct World;
-struct Player {
- struct yx_uint16 pos;
- unsigned char hitpoints; };
-
-struct MapObj {
- void * next;
- char type;
- struct yx_uint16 pos; };
-
-struct MapObjDef {
- struct MapObjDef * next;
- char id;
- char mapchar;
- char * desc; };
-
-struct Item {
- struct MapObj map_obj; };
-
-struct Monster {
- struct MapObj map_obj;
- unsigned char hitpoints; };
-
-struct ItemDef {
- struct MapObjDef map_obj_def; };
-
-struct MonsterDef {
- struct MapObjDef map_obj_def;
- unsigned char hitpoints_start; };
-
-extern void init_map_object_defs (struct World *, char *);
-extern void write_map_objects_monsterdata (void *, FILE *);
-extern void write_map_objects (void * start, FILE *, void (*) (void *, FILE *) );
-extern void read_map_objects_monsterdata (void *, FILE *);
-extern void read_map_objects (void *, FILE *, size_t, void (*) (void *, FILE *) );
-extern void build_map_objects_monsterdata (struct MapObjDef *, void *);
-extern void build_map_objects_itemdata (struct MapObjDef *, void *);
-extern void * build_map_objects (struct World *, void *, char, unsigned char, size_t,
+
+
+/* Player is non-standard: single and of a hard-coded type. */
+
+struct Player
+{
+ struct yx_uint16 pos;
+ unsigned char hitpoints;
+};
+
+
+
+/* Structs for standard map objects. */
+
+struct MapObj
+{
+ void * next;
+ char type; /* Map object type identifier (see MapObjDef.id). */
+ struct yx_uint16 pos; /* Coordinate of object on map. */
+};
+
+struct Item
+{
+ struct MapObj map_obj;
+};
+
+struct Monster
+{
+ struct MapObj map_obj;
+ unsigned char hitpoints;
+};
+
+
+
+/* Structs for map object *type* definitions. Values common to all members of
+ * a single monster or item type are harvested from these.
+ */
+
+struct MapObjDef
+{
+ struct MapObjDef * next;
+ char id; /* Unique identifier of the map object type to describe. */
+ char mapchar; /* Map object symbol to appear on map.*/
+ char * desc; /* String describing map object in the game log. */
+};
+
+struct ItemDef
+{
+ struct MapObjDef map_obj_def;
+};
+
+struct MonsterDef
+{
+ struct MapObjDef map_obj_def;
+ unsigned char hitpoints_start; /* Hitpoints each monster starts with. */
+};
+
+
+
+/* Initialize map object type definitions from file at path "filename". */
+extern void init_map_object_defs(struct World * world, char * filename);
+
+
+
+/* Build into memory starting at "start" chain of "n" map objects of type
+ * "def_id", pass either "build_map_objects_itemdata" or
+ * "build_map_objects_monsterdata" as "b_typedata"() to build data specific
+ * to monsters or items (or more forms if they ever get invented).
+ *
+ * TODO: function should decide by itself what "b_typedata"() to call based
+ * on monster-or-item info in MapObjDef struct or from a table mapping type
+ * identifiers to these.
+ */
+extern void * build_map_objects(struct World * world, void * start, char def_id,
+ unsigned char n, size_t size,
void (*) (struct MapObjDef *, void *));
-extern struct MapObjDef * get_map_obj_def (struct World *, char);
+extern void build_map_objects_itemdata(struct MapObjDef * map_obj_def,
+ void * start);
+extern void build_map_objects_monsterdata(struct MapObjDef * map_obj_def,
+ void * start);
+
+
+
+/* Write to/read from file chain of map objects starting/to start in memory at
+ * "start", use "w_typedata"()"/"r_typedata" for data specific to monsters
+ * (pass "write_map_objects_monsterdata"/"read_map_objects_itemdata") or items
+ * (currently they have no data specific only to them, so pass NULL). Use "size"
+ * in read_map_objects() to pass the size of structs of the affected map object
+ * type.
+ *
+ * TODO: the size of these structs should not need to be passed but instead be
+ * available via the type id of the affected map object type. The TODO above
+ * towards the function deciding its helper function by itself also applies.
+ */
+extern void write_map_objects(void * start, FILE * file,
+ void (* w_typedata) (void *, FILE *) );
+extern void read_map_objects(void * start, FILE * file, size_t size,
+ void (* w_typedata) (void *, FILE *) );
+extern void write_map_objects_monsterdata(void * start, FILE * file);
+extern void read_map_objects_monsterdata( void * start, FILE * file);
+
+
+
+/* Get pointer to the map object definition of identifier "def_id". */
+extern struct MapObjDef * get_map_obj_def(struct World * world, char def_id);
#endif
projects / plomrogue / commitdiff