3 /* xbt/dict.h -- api to a generic dictionary */
5 /* Copyright (c) 2003, 2004 Martin Quinson. All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
14 #include "xbt/misc.h" /* SG_BEGIN_DECL */
15 #include "xbt/dynar.h" /* void_f_pvoid_t */
19 /** @addtogroup XBT_dict
20 * @brief The dictionnary data structure (comparable to hash tables)
22 * <center><table><tr><td><b>Top</b> <td> [\ref index]::[\ref XBT_API]
23 * <tr><td><b>Prev</b> <td> [\ref XBT_dynar]
24 * <tr><td><b>Next</b> <td> [\ref XBT_set]
25 * <tr><td><b>Down</b> <td> [\ref XBT_dict_cons] </table></center>
27 * This section describes the API to a dictionnary structure that
28 * associates as string to a void* key. Even if it provides the same
29 * functionnality than an hash table, the implementation differs and the
30 * internal data-structure rather looks like a tree.
32 * Here is a little example of use:
33 * \verbatim xbt_dict_t mydict = xbt_dict_new();
36 sprintf(buff,"some very precious data");
37 xbt_dict_set(mydict,"my data", strdup(buff), free);
39 sprintf(buff,"another good stuff");
40 xbt_dict_set(mydict,"my data", strdup(buff), free); // previous data gets erased (and freed) by second add \endverbatim
45 /** @defgroup XBT_dict_cons Dict constructor and destructor
48 * <center><table><tr><td><b>Top</b> <td> [\ref index]::[\ref XBT_API]::[\ref XBT_dict]
50 * <tr><td><b>Next</b> <td> [\ref XBT_dict_basic] </table></center>
55 /** \brief Dictionnary data type (opaque structure) */
56 typedef struct xbt_dict_ *xbt_dict_t;
57 xbt_dict_t xbt_dict_new(void);
58 void xbt_dict_free(xbt_dict_t *dict);
61 /** @defgroup XBT_dict_basic Dictionnaries basic usage
64 * <center><table><tr><td><b>Top</b> <td> [\ref index]::[\ref XBT_API]::[\ref XBT_dict]
65 * <tr><td><b>Prev</b> <td> [\ref XBT_dict_cons]
66 * <tr><td><b>Next</b> <td> [\ref XBT_dict_nnul] </table></center>
68 * Careful, those functions assume that the key is null-terminated.
73 void xbt_dict_set(xbt_dict_t head, const char *key, void *data, void_f_pvoid_t *free_ctn);
74 void *xbt_dict_get(xbt_dict_t head,const char *key);
75 void *xbt_dict_get_or_null(xbt_dict_t dict, const char *key);
77 void xbt_dict_remove(xbt_dict_t head, const char *key);
78 void xbt_dict_dump(xbt_dict_t head,void (*output)(void*));
81 /** @defgroup XBT_dict_nnul Dictionnaries with non-nul terminated keys
84 * <center><table><tr><td><b>Top</b> <td> [\ref index]::[\ref XBT_API]::[\ref XBT_dict]
85 * <tr><td><b>Prev</b> <td> [\ref XBT_dict_basic]
86 * <tr><td><b>Next</b> <td> [\ref XBT_dict_curs] </table></center>
88 * Those functions work even with non-null terminated keys.
92 void xbt_dict_set_ext(xbt_dict_t head,
93 const char *key, int key_len,
95 void_f_pvoid_t *free_ctn);
96 void *xbt_dict_get_ext(xbt_dict_t head,const char *key, int key_len);
97 void xbt_dict_remove_ext(xbt_dict_t head, const char *key, int key_len);
101 /** @defgroup XBT_dict_curs Cursors on dictionnaries
104 * <center><table><tr><td><b>Top</b> <td> [\ref index]::[\ref XBT_API]::[\ref XBT_dict]
105 * <tr><td><b>Prev</b> <td> [\ref XBT_dict_nnul]
106 * <tr><td><b>Next</b> <td> [\ref XBT_dict_multi] </table></center>
108 * Don't get impressed, there is a lot of functions here, but traversing a
109 * dictionnary is imediate with the xbt_dict_foreach macro.
110 * You only need the other functions in rare cases (they are not used directly in SG itself).
112 * Here is an example (assuming that the dictionnary contains strings, ie
113 * that the <tt>data</tt> argument of xbt_dict_set was always a null-terminated char*):
114 \verbatim xbt_dict_cursor_t cursor=NULL;
117 xbt_dict_foreach(head,cursor,key,data) {
118 printf(" - Seen: %s->%s\n",key,data);
122 * \warning Do not add or remove entries to the cache while traversing !!
126 /** @brief Cursor on dictionnaries (opaque type) */
127 typedef struct xbt_dict_cursor_ *xbt_dict_cursor_t;
128 xbt_dict_cursor_t xbt_dict_cursor_new(const xbt_dict_t head);
129 void xbt_dict_cursor_free(xbt_dict_cursor_t *cursor);
131 void xbt_dict_cursor_rewind(xbt_dict_cursor_t cursor);
134 char * xbt_dict_cursor_get_key (xbt_dict_cursor_t cursor);
135 void * xbt_dict_cursor_get_data (xbt_dict_cursor_t cursor);
137 void xbt_dict_cursor_first (const xbt_dict_t dict,
138 xbt_dict_cursor_t *cursor);
139 void xbt_dict_cursor_step (xbt_dict_cursor_t cursor);
140 int xbt_dict_cursor_get_or_free (xbt_dict_cursor_t *cursor,
143 /** @def xbt_dict_foreach
145 # define xbt_dict_foreach(dict,cursor,key,data) \
146 for (cursor=NULL, xbt_dict_cursor_first((dict),&(cursor)) ; \
147 xbt_dict_cursor_get_or_free(&(cursor),&(key),(void**)(&data));\
148 xbt_dict_cursor_step(cursor) )
151 /** @defgroup XBT_dict_multi Multi-level dictionnaries
154 * <center><table><tr><td><b>Top</b> <td> [\ref index]::[\ref XBT_API]::[\ref XBT_dict]
155 * <tr><td><b>Prev</b> <td> [\ref XBT_dict_curs]
156 * <tr><td> Next <td> </table></center>
158 * They can be seen as dictionnary of multiple keys or as dictionnary of
159 * dictionnary of ... of data. Most of the functions here work the same way
160 * than their simple dictionnary counterpart.
162 * Note that there is no xbt_multidict_free neither xbt_multi_dict_new functions.
163 * Use xbt_dict_free() and xbt_dict_new() instead.
168 /** \brief To dump multicache, this function dumps a cache */
169 void xbt_dict_print(void *data);
170 /** \brief To dump multicache, this one dumps a string */
171 void xbt_dict_prints(void *data);
174 /*----[ xbt_multidict_set ]--------------------------------------------------*/
176 xbt_multidict_set(xbt_dict_t mdict,
178 void *data,void (*free_ctn)(void*));
180 xbt_multidict_set_ext(xbt_dict_t mdict,
181 xbt_dynar_t keys, xbt_dynar_t lens,
182 void *data,void_f_pvoid_t *free_ctn);
184 /*----[ xbt_multidict_get ]--------------------------------------------------*/
185 void *xbt_multidict_get (xbt_dict_t mdict, xbt_dynar_t keys);
186 void *xbt_multidict_get_ext(xbt_dict_t mdict, xbt_dynar_t keys, xbt_dynar_t lens);
188 /*----[ xbt_multidict_remove ]-----------------------------------------------*/
189 /*---------------------------------------------------------------------------*/
190 void xbt_multidict_remove(xbt_dict_t mdict, xbt_dynar_t keys);
191 void xbt_multidict_remove_ext(xbt_dict_t mdict, xbt_dynar_t keys, xbt_dynar_t lens);
197 #endif /* _XBT_DICT_H */