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 */
#if 1
/* currently 31 bit is still sufficient since there are less than */
/* 2 billion nodes or changesets */
typedef gint32 item_id_t;
#define G_TYPE_ITEM_ID_T G_TYPE_INT
#define ITEM_ID_FORMAT  "%" G_GINT32_FORMAT
#else
/* the future may require us to switch to 64 bits */
typedef gint64 item_id_t;
#define G_TYPE_ITEM_ID_T G_TYPE_INT64
#define ITEM_ID_FORMAT  "%" G_GINT64_FORMAT
#endif

#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;
  item_id_t version;
  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;
  item_id_t version;
  item_id_t changeset;
  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;
  item_id_t version;
  item_id_t changeset;
  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 *path, 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_changeset(osm_t *osm, char *comment);
char *osm_generate_xml_node(osm_t *osm, item_id_t changeset, node_t *node);
char *osm_generate_xml_way(osm_t *osm, item_id_t changeset, way_t *way);
char *osm_generate_xml_relation(osm_t *osm, item_id_t changeset, 
                                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);
relation_chain_t *osm_relation_to_relation(osm_t *osm, relation_t *relation);
relation_chain_t *osm_object_to_relation(osm_t *osm, object_t *object);
void osm_relation_chain_free(relation_chain_t *relation_chain);
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);

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);
char *osm_object_get_name(object_t *object);
char *osm_object_get_speaking_name(object_t *object);

#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	#if 1
33	/* currently 31 bit is still sufficient since there are less than */
34	/* 2 billion nodes or changesets */
35	typedef gint32 item_id_t;
36	#define G_TYPE_ITEM_ID_T G_TYPE_INT
37	#define ITEM_ID_FORMAT "%" G_GINT32_FORMAT
38	#else
39	/* the future may require us to switch to 64 bits */
40	typedef gint64 item_id_t;
41	#define G_TYPE_ITEM_ID_T G_TYPE_INT64
42	#define ITEM_ID_FORMAT "%" G_GINT64_FORMAT
43	#endif
44
45	#define ID_ILLEGAL ((item_id_t)0)
46
47	/* icon stuff is required since nodes may held a icon reference */
48	struct icon_s;
49
50	typedef struct bounds_s {
51	pos_t ll_min, ll_max;
52	lpos_t min, max;
53	lpos_t center;
54	float scale;
55	} bounds_t;
56
57	typedef struct user_s {
58	char *name;
59	struct user_s *next;
60	} user_t;
61
62	typedef struct tag_s {
63	char key, value;
64	struct tag_s *next;
65	} tag_t;
66
67	typedef struct node_s {
68	item_id_t id;
69	item_id_t version;
70	pos_t pos;
71	lpos_t lpos;
72	user_t *user;
73	gboolean visible;
74	time_t time;
75	tag_t *tag;
76	int ways;
77	int flags;
78	float zoom_max;
79
80	/* icon */
81	GdkPixbuf *icon_buf;
82
83	/* a link to the visual representation on screen */
84	struct map_item_chain_s *map_item_chain;
85
86	struct node_s *next;
87	} node_t;
88
89	typedef struct node_chain {
90	node_t *node;
91	struct node_chain *next;
92	} node_chain_t;
93
94	#define OSM_DRAW_FLAG_AREA (1<<0)
95	#define OSM_DRAW_FLAG_BG (1<<1)
96
97	typedef struct way_s {
98	item_id_t id;
99	item_id_t version;
100	item_id_t changeset;
101	user_t *user;
102	gboolean visible;
103	time_t time;
104	tag_t *tag;
105	node_chain_t *node_chain;
106	int flags;
107
108	/* visual representation from elemstyle */
109	struct {
110	guint flags;
111	gulong color;
112	gint width;
113	float zoom_max;
114	gboolean dashed;
115	guint dash_length;
116
117	union {
118	struct {
119	gulong color;
120	gint width;
121	} bg;
122
123	struct {
124	gulong color;
125	} area;
126	};
127	} draw;
128
129	/* a link to the visual representation on screen */
130	struct map_item_chain_s *map_item_chain;
131
132	struct way_s *next;
133	} way_t;
134
135	typedef struct way_chain {
136	way_t *way;
137	struct way_chain *next;
138	} way_chain_t;
139
140	typedef struct relation_s {
141	item_id_t id;
142	item_id_t version;
143	item_id_t changeset;
144	user_t *user;
145	gboolean visible;
146	time_t time;
147	tag_t *tag;
148	struct member_s *member;
149	int flags;
150
151	struct relation_s *next;
152	} relation_t;
153
154	typedef struct relation_chain_s {
155	relation_t *relation;
156	struct relation_chain_s *next;
157	} relation_chain_t;
158
159	/* two of these hash tables are used, one for nodes and one for ways */
160	/* currently relations aren't used often enough to justify the use */
161	/* of a hash table */
162
163	/* the current hash table uses 16 bits. each table thus is */
164	/* 256 kbytes (2^16 * sizeof(void)) in size /
165	#define ID2HASH(a) ((unsigned short)(a) ^ (unsigned short)((a)>>16))
166	typedef struct hash_item_s {
167	union {
168	node_t *node;
169	way_t *way;
170	relation_t *relation;
171	} data;
172
173	struct hash_item_s *next;
174	} hash_item_t;
175
176	typedef struct {
177	hash_item_t *hash[65536];
178	} hash_table_t;
179
180	typedef enum {
181	ILLEGAL=0, NODE, WAY, RELATION, NODE_ID, WAY_ID, RELATION_ID
182	} type_t;
183
184	typedef struct {
185	type_t type;
186	union {
187	node_t *node;
188	way_t *way;
189	relation_t *relation;
190	item_id_t id;
191	void *ptr;
192	};
193	} object_t;
194
195	typedef struct member_s {
196	object_t object;
197	char *role;
198	struct member_s *next;
199	} member_t;
200
201	typedef struct osm_s {
202	bounds_t *bounds; // original bounds as they appear in the file
203	user_t *user;
204
205	node_t *node;
206	hash_table_t *node_hash;
207
208	way_t *way;
209	hash_table_t *way_hash;
210
211	// hashing relations doesn't yet make much sense as relations are quite rare
212	relation_t *relation;
213
214	} osm_t;
215
216	#include <libxml/parser.h>
217	#include <libxml/tree.h>
218
219	osm_t osm_parse(char path, char *filename);
220	gboolean osm_sanity_check(GtkWidget parent, osm_t osm);
221	tag_t osm_parse_osm_tag(osm_t osm, xmlDocPtr doc, xmlNode *a_node);
222	node_chain_t osm_parse_osm_way_nd(osm_t osm, xmlDocPtr doc, xmlNode *a_node);
223	member_t osm_parse_osm_relation_member(osm_t osm, xmlDocPtr doc, xmlNode *a_node);
224	void osm_dump(osm_t *osm);
225	void osm_free(struct icon_s *icon, osm_t osm);
226
227	char osm_node_get_value(node_t node, char *key);
228	gboolean osm_node_has_tag(node_t *node);
229
230	void osm_node_dump(node_t *node);
231
232	void osm_way_free(way_t *way);
233	void osm_way_dump(way_t *way);
234	char osm_way_get_value(way_t way, char *key);
235	gboolean osm_node_has_value(node_t node, char str);
236	gboolean osm_way_has_value(way_t way, char str);
237	void osm_way_append_node(way_t way, node_t node);
238
239	gboolean osm_node_in_way(way_t way, node_t node);
240
241	void osm_node_chain_free(node_chain_t *node_chain);
242	int osm_node_chain_length(node_chain_t *node_chain);
243	void osm_node_free(struct icon_s *icon, node_t node);
244
245	void osm_members_free(member_t *member);
246	void osm_member_free(member_t *member);
247
248	void osm_tag_free(tag_t *tag);
249	void osm_tags_free(tag_t *tag);
250	char osm_tag_get_by_key(tag_t tag, char *key);
251	gboolean osm_is_creator_tag(tag_t *tag);
252	gboolean osm_tag_key_and_value_present(tag_t haystack, tag_t tag);
253	gboolean osm_tag_key_other_value_present(tag_t haystack, tag_t tag);
254
255	char osm_generate_xml_changeset(osm_t osm, char *comment);
256	char osm_generate_xml_node(osm_t osm, item_id_t changeset, node_t *node);
257	char osm_generate_xml_way(osm_t osm, item_id_t changeset, way_t *way);
258	char osm_generate_xml_relation(osm_t osm, item_id_t changeset,
259	relation_t *relation);
260
261	node_t osm_get_node_by_id(osm_t osm, item_id_t id);
262	way_t osm_get_way_by_id(osm_t osm, item_id_t id);
263	relation_t osm_get_relation_by_id(osm_t osm, item_id_t id);
264
265	guint osm_way_number_of_nodes(way_t *way);
266	relation_chain_t osm_node_to_relation(osm_t osm, node_t *node);
267	relation_chain_t osm_way_to_relation(osm_t osm, way_t *way);
268	relation_chain_t osm_relation_to_relation(osm_t osm, relation_t *relation);
269	relation_chain_t osm_object_to_relation(osm_t osm, object_t *object);
270	void osm_relation_chain_free(relation_chain_t *relation_chain);
271	way_chain_t osm_node_to_way(osm_t osm, node_t *node);
272
273	/* ----------- edit functions ----------- */
274	node_t osm_node_new(osm_t osm, gint x, gint y);
275	void osm_node_attach(osm_t osm, node_t node);
276	void osm_node_restore(osm_t osm, node_t node);
277	way_chain_t osm_node_delete(osm_t osm, struct icon_s *icon, node_t node,
278	gboolean permanently, gboolean affect_ways);
279	void osm_way_delete(osm_t osm, struct icon_s icon, way_t way,
280	gboolean permanently);
281
282	way_t *osm_way_new(void);
283	void osm_way_attach(osm_t osm, way_t way);
284
285	gboolean osm_position_within_bounds(osm_t *osm, gint x, gint y);
286	item_id_t osm_new_way_id(osm_t *osm);
287	gboolean osm_way_ends_with_node(way_t way, node_t node);
288
289	void osm_way_reverse(way_t *way);
290	guint osm_way_reverse_direction_sensitive_tags(way_t *way);
291	guint osm_way_reverse_direction_sensitive_roles(osm_t osm, way_t way);
292
293	void osm_node_remove_from_relation(osm_t osm, node_t node);
294	void osm_way_remove_from_relation(osm_t osm, way_t way);
295
296	node_t osm_way_get_last_node(way_t way);
297	node_t osm_way_get_first_node(way_t way);
298	void osm_way_rotate(way_t *way, gint offset);
299
300	tag_t osm_tags_copy(tag_t tag);
301
302	relation_t *osm_relation_new(void);
303	void osm_relation_free(relation_t *relation);
304	void osm_relation_attach(osm_t osm, relation_t relation);
305	void osm_relation_delete(osm_t osm, relation_t relation,
306	gboolean permanently);
307	gint osm_relation_members_num(relation_t *relation);
308
309	char osm_object_type_string(object_t object);
310	char osm_object_id_string(object_t object);
311	char osm_object_string(object_t object);
312	tag_t osm_object_get_tags(object_t object);
313	void osm_object_set_flags(object_t *map_item, int set, int clr);
314	char osm_object_get_name(object_t object);
315	char osm_object_get_speaking_name(object_t object);
316
317	#endif /* OSM_H */
318
319	// vim:et:ts=8:sw=2:sts=2:ai