trunk/src/osm.h

/*
 * Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
 *
 * This file is part of OSM2Go.
 *
 * OSM2Go is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * OSM2Go is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OSM2Go.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef OSM_H
#define OSM_H

#include <math.h>

#define OSM_FLAG_DIRTY    (1<<0)
#define OSM_FLAG_DELETED  (1<<1)
#define OSM_FLAG_NEW      (1<<2)
#define OSM_FLAG_HIDDEN   (1<<3)

/* item_id_t needs to be signed as osm2go uses negative ids for items */
/* not yet registered with the main osm database */
typedef glong item_id_t;
#define G_TYPE_ITEM_ID_T G_TYPE_LONG

#define ID_ILLEGAL  ((item_id_t)0)

/* icon stuff is required since nodes may held a icon reference */
struct icon_s;

typedef struct bounds_s {
  pos_t ll_min, ll_max;
  lpos_t min, max;
  lpos_t center;
  float scale;
} bounds_t;

typedef struct user_s {
  char *name;
  struct user_s *next;
} user_t;

typedef struct tag_s {
  char *key, *value;
  struct tag_s *next;
} tag_t;

typedef struct node_s {
  item_id_t id;
  pos_t pos;
  lpos_t lpos;
  user_t *user;
  gboolean visible;
  time_t time;
  tag_t *tag;
  int ways;
  int flags;
  float zoom_max;

  /* icon */
  GdkPixbuf *icon_buf;

  /* a link to the visual representation on screen */
  struct map_item_chain_s *map_item_chain;

  struct node_s *next;
} node_t;

typedef struct node_chain {
  node_t *node;
  struct node_chain *next;
} node_chain_t;

#define OSM_DRAW_FLAG_AREA  (1<<0)
#define OSM_DRAW_FLAG_BG    (1<<1)

typedef struct way_s {
  item_id_t id;
  user_t *user;
  gboolean visible;
  time_t time;
  tag_t *tag;
  node_chain_t *node_chain;
  int flags;

  /* visual representation from elemstyle */
  struct {
    guint flags;
    gulong color;
    gint width;
    float zoom_max;
    gboolean dashed;
    guint dash_length;

    union {
      struct {
        gulong color;
        gint width;
      } bg;
      
      struct {
        gulong color;
      } area;
    };     
  } draw;
  
  /* a link to the visual representation on screen */
  struct map_item_chain_s *map_item_chain;

  struct way_s *next;
} way_t;

typedef struct way_chain {
  way_t *way;
  struct way_chain *next;
} way_chain_t;

typedef struct relation_s {
  item_id_t id;
  user_t *user;
  gboolean visible;
  time_t time;
  tag_t *tag;
  struct member_s *member;
  int flags;

  struct relation_s *next;
} relation_t;

typedef struct relation_chain_s {
  relation_t *relation;
  struct relation_chain_s *next;
} relation_chain_t;

/* two of these hash tables are used, one for nodes and one for ways */
/* currently relations aren't used often enough to justify the use */
/* of a hash table */

/* the current hash table uses 16 bits. each table thus is */
/* 256 kbytes (2^16 * sizeof(void*)) in size */
#define ID2HASH(a) ((unsigned short)(a) ^ (unsigned short)((a)>>16))

typedef struct hash_item_s {
  union {
    node_t *node;
    way_t *way;
    relation_t *relation;
  } data;

  struct hash_item_s *next;
} hash_item_t;

typedef struct {
  hash_item_t *hash[65536];
} hash_table_t;

typedef enum {
  ILLEGAL=0, NODE, WAY, RELATION, NODE_ID, WAY_ID, RELATION_ID
} type_t;

typedef struct {
  type_t type;
  union {
    node_t *node;
    way_t *way;
    relation_t *relation;
    item_id_t id;
    void *ptr;
  };
} object_t;

typedef struct member_s {
  object_t object;
  char   *role;
  struct member_s *next;
} member_t;

typedef struct osm_s {
  bounds_t *bounds;   // original bounds as they appear in the file
  user_t *user;

  node_t *node;
  hash_table_t *node_hash;

  way_t  *way;
  hash_table_t *way_hash;

  // hashing relations doesn't yet make much sense as relations are quite rare
  relation_t  *relation;

} osm_t;

#include <libxml/parser.h>
#include <libxml/tree.h>

osm_t *osm_parse(char *filename);
gboolean osm_sanity_check(GtkWidget *parent, osm_t *osm);
tag_t *osm_parse_osm_tag(osm_t *osm, xmlDocPtr doc, xmlNode *a_node);
node_chain_t *osm_parse_osm_way_nd(osm_t *osm, xmlDocPtr doc, xmlNode *a_node);
member_t *osm_parse_osm_relation_member(osm_t *osm, xmlDocPtr doc, xmlNode *a_node);
void osm_dump(osm_t *osm);
void osm_free(struct icon_s **icon, osm_t *osm);

char *osm_node_get_value(node_t *node, char *key);
gboolean osm_node_has_tag(node_t *node);

void osm_node_dump(node_t *node);

void osm_way_free(way_t *way);
void osm_way_dump(way_t *way);
char *osm_way_get_value(way_t *way, char *key);
gboolean osm_node_has_value(node_t *node, char *str);
gboolean osm_way_has_value(way_t *way, char *str);
void osm_way_append_node(way_t *way, node_t *node);

gboolean osm_node_in_way(way_t *way, node_t *node);

void osm_node_chain_free(node_chain_t *node_chain);
int osm_node_chain_length(node_chain_t *node_chain);
void osm_node_free(struct icon_s **icon, node_t *node);

void osm_members_free(member_t *member);
void osm_member_free(member_t *member);

void osm_tag_free(tag_t *tag);
void osm_tags_free(tag_t *tag);
char *osm_tag_get_by_key(tag_t *tag, char *key);
gboolean osm_is_creator_tag(tag_t *tag);
gboolean osm_tag_key_and_value_present(tag_t *haystack, tag_t *tag);
gboolean osm_tag_key_other_value_present(tag_t *haystack, tag_t *tag);

char *osm_generate_xml_node(osm_t *osm, node_t *node);
char *osm_generate_xml_way(osm_t *osm, way_t *way);
char *osm_generate_xml_relation(osm_t *osm, relation_t *relation);

node_t *osm_get_node_by_id(osm_t *osm, item_id_t id);
way_t *osm_get_way_by_id(osm_t *osm, item_id_t id);
relation_t *osm_get_relation_by_id(osm_t *osm, item_id_t id);

guint osm_way_number_of_nodes(way_t *way);
relation_chain_t *osm_node_to_relation(osm_t *osm, node_t *node);
relation_chain_t *osm_way_to_relation(osm_t *osm, way_t *way);
way_chain_t *osm_node_to_way(osm_t *osm, node_t *node);

/* ----------- edit functions ----------- */
node_t *osm_node_new(osm_t *osm, gint x, gint y);
void osm_node_attach(osm_t *osm, node_t *node);
void osm_node_restore(osm_t *osm, node_t *node);
way_chain_t *osm_node_delete(osm_t *osm, struct icon_s **icon, node_t *node, 
                             gboolean permanently, gboolean affect_ways);
void osm_way_delete(osm_t *osm, struct icon_s **icon, way_t *way, 
                    gboolean permanently);

way_t *osm_way_new(void);
void osm_way_attach(osm_t *osm, way_t *way);

gboolean osm_position_within_bounds(osm_t *osm, gint x, gint y);
item_id_t osm_new_way_id(osm_t *osm);
gboolean osm_way_ends_with_node(way_t *way, node_t *node);

void osm_way_reverse(way_t *way);
guint osm_way_reverse_direction_sensitive_tags(way_t *way);
guint osm_way_reverse_direction_sensitive_roles(osm_t *osm, way_t *way);

void osm_node_remove_from_relation(osm_t *osm, node_t *node);
void osm_way_remove_from_relation(osm_t *osm, way_t *way);

node_t *osm_way_get_last_node(way_t *way);
node_t *osm_way_get_first_node(way_t *way);
void osm_way_rotate(way_t *way, gint offset);

tag_t *osm_tags_copy(tag_t *tag, gboolean update_creator);

relation_t *osm_relation_new(void);
void osm_relation_free(relation_t *relation);
void osm_relation_attach(osm_t *osm, relation_t *relation);
void osm_relation_delete(osm_t *osm, relation_t *relation, 
                         gboolean permanently);
gint osm_relation_members_num(relation_t *relation);

char *osm_object_type_string(object_t *object);
char *osm_object_id_string(object_t *object);
char *osm_object_string(object_t *object);
tag_t *osm_object_get_tags(object_t *object);
void osm_object_set_flags(object_t *map_item, int set, int clr);

#endif /* OSM_H */

// vim:et:ts=8:sw=2:sts=2:ai
1	/*
2	* Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
3	*
4	* This file is part of OSM2Go.
5	*
6	* OSM2Go is free software: you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation, either version 3 of the License, or
9	* (at your option) any later version.
10	*
11	* OSM2Go is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with OSM2Go. If not, see <http://www.gnu.org/licenses/>.
18	*/
19
20	#ifndef OSM_H
21	#define OSM_H
22
23	#include <math.h>
24
25	#define OSM_FLAG_DIRTY (1<<0)
26	#define OSM_FLAG_DELETED (1<<1)
27	#define OSM_FLAG_NEW (1<<2)
28	#define OSM_FLAG_HIDDEN (1<<3)
29
30	/* item_id_t needs to be signed as osm2go uses negative ids for items */
31	/* not yet registered with the main osm database */
32	typedef glong item_id_t;
33	#define G_TYPE_ITEM_ID_T G_TYPE_LONG
34
35	#define ID_ILLEGAL ((item_id_t)0)
36
37	/* icon stuff is required since nodes may held a icon reference */
38	struct icon_s;
39
40	typedef struct bounds_s {
41	pos_t ll_min, ll_max;
42	lpos_t min, max;
43	lpos_t center;
44	float scale;
45	} bounds_t;
46
47	typedef struct user_s {
48	char *name;
49	struct user_s *next;
50	} user_t;
51
52	typedef struct tag_s {
53	char key, value;
54	struct tag_s *next;
55	} tag_t;
56
57	typedef struct node_s {
58	item_id_t id;
59	pos_t pos;
60	lpos_t lpos;
61	user_t *user;
62	gboolean visible;
63	time_t time;
64	tag_t *tag;
65	int ways;
66	int flags;
67	float zoom_max;
68
69	/* icon */
70	GdkPixbuf *icon_buf;
71
72	/* a link to the visual representation on screen */
73	struct map_item_chain_s *map_item_chain;
74
75	struct node_s *next;
76	} node_t;
77
78	typedef struct node_chain {
79	node_t *node;
80	struct node_chain *next;
81	} node_chain_t;
82
83	#define OSM_DRAW_FLAG_AREA (1<<0)
84	#define OSM_DRAW_FLAG_BG (1<<1)
85
86	typedef struct way_s {
87	item_id_t id;
88	user_t *user;
89	gboolean visible;
90	time_t time;
91	tag_t *tag;
92	node_chain_t *node_chain;
93	int flags;
94
95	/* visual representation from elemstyle */
96	struct {
97	guint flags;
98	gulong color;
99	gint width;
100	float zoom_max;
101	gboolean dashed;
102	guint dash_length;
103
104	union {
105	struct {
106	gulong color;
107	gint width;
108	} bg;
109
110	struct {
111	gulong color;
112	} area;
113	};
114	} draw;
115
116	/* a link to the visual representation on screen */
117	struct map_item_chain_s *map_item_chain;
118
119	struct way_s *next;
120	} way_t;
121
122	typedef struct way_chain {
123	way_t *way;
124	struct way_chain *next;
125	} way_chain_t;
126
127	typedef struct relation_s {
128	item_id_t id;
129	user_t *user;
130	gboolean visible;
131	time_t time;
132	tag_t *tag;
133	struct member_s *member;
134	int flags;
135
136	struct relation_s *next;
137	} relation_t;
138
139	typedef struct relation_chain_s {
140	relation_t *relation;
141	struct relation_chain_s *next;
142	} relation_chain_t;
143
144	/* two of these hash tables are used, one for nodes and one for ways */
145	/* currently relations aren't used often enough to justify the use */
146	/* of a hash table */
147
148	/* the current hash table uses 16 bits. each table thus is */
149	/* 256 kbytes (2^16 * sizeof(void)) in size /
150	#define ID2HASH(a) ((unsigned short)(a) ^ (unsigned short)((a)>>16))
151
152	typedef struct hash_item_s {
153	union {
154	node_t *node;
155	way_t *way;
156	relation_t *relation;
157	} data;
158
159	struct hash_item_s *next;
160	} hash_item_t;
161
162	typedef struct {
163	hash_item_t *hash[65536];
164	} hash_table_t;
165
166	typedef enum {
167	ILLEGAL=0, NODE, WAY, RELATION, NODE_ID, WAY_ID, RELATION_ID
168	} type_t;
169
170	typedef struct {
171	type_t type;
172	union {
173	node_t *node;
174	way_t *way;
175	relation_t *relation;
176	item_id_t id;
177	void *ptr;
178	};
179	} object_t;
180
181	typedef struct member_s {
182	object_t object;
183	char *role;
184	struct member_s *next;
185	} member_t;
186
187	typedef struct osm_s {
188	bounds_t *bounds; // original bounds as they appear in the file
189	user_t *user;
190
191	node_t *node;
192	hash_table_t *node_hash;
193
194	way_t *way;
195	hash_table_t *way_hash;
196
197	// hashing relations doesn't yet make much sense as relations are quite rare
198	relation_t *relation;
199
200	} osm_t;
201
202	#include <libxml/parser.h>
203	#include <libxml/tree.h>
204
205	osm_t osm_parse(char filename);
206	gboolean osm_sanity_check(GtkWidget parent, osm_t osm);
207	tag_t osm_parse_osm_tag(osm_t osm, xmlDocPtr doc, xmlNode *a_node);
208	node_chain_t osm_parse_osm_way_nd(osm_t osm, xmlDocPtr doc, xmlNode *a_node);
209	member_t osm_parse_osm_relation_member(osm_t osm, xmlDocPtr doc, xmlNode *a_node);
210	void osm_dump(osm_t *osm);
211	void osm_free(struct icon_s *icon, osm_t osm);
212
213	char osm_node_get_value(node_t node, char *key);
214	gboolean osm_node_has_tag(node_t *node);
215
216	void osm_node_dump(node_t *node);
217
218	void osm_way_free(way_t *way);
219	void osm_way_dump(way_t *way);
220	char osm_way_get_value(way_t way, char *key);
221	gboolean osm_node_has_value(node_t node, char str);
222	gboolean osm_way_has_value(way_t way, char str);
223	void osm_way_append_node(way_t way, node_t node);
224
225	gboolean osm_node_in_way(way_t way, node_t node);
226
227	void osm_node_chain_free(node_chain_t *node_chain);
228	int osm_node_chain_length(node_chain_t *node_chain);
229	void osm_node_free(struct icon_s *icon, node_t node);
230
231	void osm_members_free(member_t *member);
232	void osm_member_free(member_t *member);
233
234	void osm_tag_free(tag_t *tag);
235	void osm_tags_free(tag_t *tag);
236	char osm_tag_get_by_key(tag_t tag, char *key);
237	gboolean osm_is_creator_tag(tag_t *tag);
238	gboolean osm_tag_key_and_value_present(tag_t haystack, tag_t tag);
239	gboolean osm_tag_key_other_value_present(tag_t haystack, tag_t tag);
240
241	char osm_generate_xml_node(osm_t osm, node_t *node);
242	char osm_generate_xml_way(osm_t osm, way_t *way);
243	char osm_generate_xml_relation(osm_t osm, relation_t *relation);
244
245	node_t osm_get_node_by_id(osm_t osm, item_id_t id);
246	way_t osm_get_way_by_id(osm_t osm, item_id_t id);
247	relation_t osm_get_relation_by_id(osm_t osm, item_id_t id);
248
249	guint osm_way_number_of_nodes(way_t *way);
250	relation_chain_t osm_node_to_relation(osm_t osm, node_t *node);
251	relation_chain_t osm_way_to_relation(osm_t osm, way_t *way);
252	way_chain_t osm_node_to_way(osm_t osm, node_t *node);
253
254	/* ----------- edit functions ----------- */
255	node_t osm_node_new(osm_t osm, gint x, gint y);
256	void osm_node_attach(osm_t osm, node_t node);
257	void osm_node_restore(osm_t osm, node_t node);
258	way_chain_t osm_node_delete(osm_t osm, struct icon_s *icon, node_t node,
259	gboolean permanently, gboolean affect_ways);
260	void osm_way_delete(osm_t osm, struct icon_s icon, way_t way,
261	gboolean permanently);
262
263	way_t *osm_way_new(void);
264	void osm_way_attach(osm_t osm, way_t way);
265
266	gboolean osm_position_within_bounds(osm_t *osm, gint x, gint y);
267	item_id_t osm_new_way_id(osm_t *osm);
268	gboolean osm_way_ends_with_node(way_t way, node_t node);
269
270	void osm_way_reverse(way_t *way);
271	guint osm_way_reverse_direction_sensitive_tags(way_t *way);
272	guint osm_way_reverse_direction_sensitive_roles(osm_t osm, way_t way);
273
274	void osm_node_remove_from_relation(osm_t osm, node_t node);
275	void osm_way_remove_from_relation(osm_t osm, way_t way);
276
277	node_t osm_way_get_last_node(way_t way);
278	node_t osm_way_get_first_node(way_t way);
279	void osm_way_rotate(way_t *way, gint offset);
280
281	tag_t osm_tags_copy(tag_t tag, gboolean update_creator);
282
283	relation_t *osm_relation_new(void);
284	void osm_relation_free(relation_t *relation);
285	void osm_relation_attach(osm_t osm, relation_t relation);
286	void osm_relation_delete(osm_t osm, relation_t relation,
287	gboolean permanently);
288	gint osm_relation_members_num(relation_t *relation);
289
290	char osm_object_type_string(object_t object);
291	char osm_object_id_string(object_t object);
292	char osm_object_string(object_t object);
293	tag_t osm_object_get_tags(object_t object);
294	void osm_object_set_flags(object_t *map_item, int set, int clr);
295
296	#endif /* OSM_H */
297
298	// vim:et:ts=8:sw=2:sts=2:ai