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" /* BEGIN_DECL */
15 #include "xbt/dynar.h" /* void_f_pvoid_t */
16 #include "xbt/error.h"
20 /** @addtogroup XBT_dict
22 * This section describes the API to a dictionnary structure that
23 * associates as string to a void* key. Even if it provides the same
24 * functionnality than an hash table, the implementation differs and the
25 * internal data-structure rather looks like a tree.
27 * Here is a little example of use:
28 * \verbatim xbt_dict_t mydict = xbt_dict_new();
31 sprintf(buff,"some very precious data");
32 xbt_dict_set(mydict,"my data", strdup(buff), free);
34 sprintf(buff,"another good stuff");
35 xbt_dict_set(mydict,"my data", strdup(buff), free); // previous data gets erased (and freed) by second add \endverbatim
38 * \warning This section also gets bitten by the doxygen bug reordering the name sections.
39 * Make sure to read in this order:
40 * -# Constructor/destructor
41 * -# Dictionnaries basic usage
42 * -# Non-null terminated keys
43 * -# Traversing dictionnaries with cursors
48 /** @name 1. Constructor/destructor
52 /** \brief Dictionnary data type (opaque structure) */
53 typedef struct xbt_dict_ *xbt_dict_t;
54 xbt_dict_t xbt_dict_new(void);
55 void xbt_dict_free(xbt_dict_t *dict);
58 /** @name 2. Dictionnaries basic usage
60 * Careful, those functions assume that the key is null-terminated.
64 void xbt_dict_set(xbt_dict_t head, const char *key, void *data, void_f_pvoid_t *free_ctn);
65 void *xbt_dict_get(xbt_dict_t head,const char *key);
66 void *xbt_dict_get_or_null(xbt_dict_t dict, const char *key);
68 xbt_error_t xbt_dict_remove(xbt_dict_t head, const char *key);
69 void xbt_dict_dump(xbt_dict_t head,void (*output)(void*));
72 /** @name 3. Non-null terminated keys
74 * Those functions work even with non-null terminated keys.
78 void xbt_dict_set_ext(xbt_dict_t head,
79 const char *key, int key_len,
81 void_f_pvoid_t *free_ctn);
82 void *xbt_dict_get_ext(xbt_dict_t head,const char *key, int key_len);
83 xbt_error_t xbt_dict_remove_ext(xbt_dict_t head,
84 const char *key, int key_len);
88 /** @name 4. Cursors on dictionnaries
90 * Don't get impressed, there is a lot of functions here, but traversing a
91 * dictionnary is imediate with the xbt_dict_foreach macro.
92 * You only need the other functions in rare cases (they are not used directly in SG itself).
94 * Here is an example (assuming that the dictionnary contains strings, ie
95 * that the <tt>data</tt> argument of xbt_dict_set was always a null-terminated char*):
96 \verbatim xbt_dict_cursor_t cursor=NULL;
99 xbt_dict_foreach(head,cursor,key,data) {
100 printf(" - Seen: %s->%s\n",key,data);
104 * \warning Do not add or remove entries to the cache while traversing !!
108 /** @brief Cursor on dictionnaries (opaque type) */
109 typedef struct xbt_dict_cursor_ *xbt_dict_cursor_t;
110 xbt_dict_cursor_t xbt_dict_cursor_new(const xbt_dict_t head);
111 void xbt_dict_cursor_free(xbt_dict_cursor_t *cursor);
113 void xbt_dict_cursor_rewind(xbt_dict_cursor_t cursor);
116 char * xbt_dict_cursor_get_key (xbt_dict_cursor_t cursor);
117 void * xbt_dict_cursor_get_data (xbt_dict_cursor_t cursor);
119 void xbt_dict_cursor_first (const xbt_dict_t dict,
120 xbt_dict_cursor_t *cursor);
121 void xbt_dict_cursor_step (xbt_dict_cursor_t cursor);
122 int xbt_dict_cursor_get_or_free (xbt_dict_cursor_t *cursor,
125 /** @def xbt_dict_foreach
127 # define xbt_dict_foreach(dict,cursor,key,data) \
128 for (cursor=NULL, xbt_dict_cursor_first((dict),&(cursor)) ; \
129 xbt_dict_cursor_get_or_free(&(cursor),&(key),(void**)(&data));\
130 xbt_dict_cursor_step(cursor) )
133 /** @name 5. Multi-dictionnary
135 * They can be seen as dictionnary of multiple keys or as dictionnary of
136 * dictionnary of ... of data. Most of the functions here work the same way
137 * than their simple dictionnary counterpart.
139 * Note that there is no xbt_multidict_free neither xbt_multi_dict_new functions.
140 * Use xbt_dict_free() and xbt_dict_new() instead.
145 /** \brief To dump multicache, this function dumps a cache */
146 void xbt_dict_print(void *data);
147 /** \brief To dump multicache, this one dumps a string */
148 void xbt_dict_prints(void *data);
151 /*----[ xbt_multidict_set ]--------------------------------------------------*/
153 xbt_multidict_set(xbt_dict_t mdict,
155 void *data,void (*free_ctn)(void*));
157 xbt_multidict_set_ext(xbt_dict_t mdict,
158 xbt_dynar_t keys, xbt_dynar_t lens,
159 void *data,void_f_pvoid_t *free_ctn);
161 /*----[ xbt_multidict_get ]--------------------------------------------------*/
162 void *xbt_multidict_get (xbt_dict_t mdict, xbt_dynar_t keys);
163 void *xbt_multidict_get_ext(xbt_dict_t mdict, xbt_dynar_t keys, xbt_dynar_t lens);
165 /*----[ xbt_multidict_remove ]-----------------------------------------------*/
166 /*---------------------------------------------------------------------------*/
168 xbt_multidict_remove(xbt_dict_t mdict, xbt_dynar_t keys);
170 xbt_multidict_remove_ext(xbt_dict_t mdict,
171 xbt_dynar_t keys, xbt_dynar_t lens);
178 #endif /* _XBT_DICT_H */