Silence softfloat warnings on OpenSolaris
[qemu/aliguori-queue.git] / qdict.c
blobef73265f49fc3074812fd1fbcdffadabd86156e2
1 /*
2 * QDict data type.
4 * Copyright (C) 2009 Red Hat Inc.
6 * Authors:
7 * Luiz Capitulino <lcapitulino@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
13 #include "qint.h"
14 #include "qdict.h"
15 #include "qbool.h"
16 #include "qstring.h"
17 #include "qobject.h"
18 #include "qemu-queue.h"
19 #include "qemu-common.h"
21 static void qdict_destroy_obj(QObject *obj);
23 static const QType qdict_type = {
24 .code = QTYPE_QDICT,
25 .destroy = qdict_destroy_obj,
28 /**
29 * qdict_new(): Create a new QDict
31 * Return strong reference.
33 QDict *qdict_new(void)
35 QDict *qdict;
37 qdict = qemu_mallocz(sizeof(*qdict));
38 QOBJECT_INIT(qdict, &qdict_type);
40 return qdict;
43 /**
44 * qobject_to_qdict(): Convert a QObject into a QDict
46 QDict *qobject_to_qdict(const QObject *obj)
48 if (qobject_type(obj) != QTYPE_QDICT)
49 return NULL;
51 return container_of(obj, QDict, base);
54 /**
55 * tdb_hash(): based on the hash agorithm from gdbm, via tdb
56 * (from module-init-tools)
58 static unsigned int tdb_hash(const char *name)
60 unsigned value; /* Used to compute the hash value. */
61 unsigned i; /* Used to cycle through random values. */
63 /* Set the initial value from the key size. */
64 for (value = 0x238F13AF * strlen(name), i=0; name[i]; i++)
65 value = (value + (((const unsigned char *)name)[i] << (i*5 % 24)));
67 return (1103515243 * value + 12345);
70 /**
71 * alloc_entry(): allocate a new QDictEntry
73 static QDictEntry *alloc_entry(const char *key, QObject *value)
75 QDictEntry *entry;
77 entry = qemu_mallocz(sizeof(*entry));
78 entry->key = qemu_strdup(key);
79 entry->value = value;
81 return entry;
84 /**
85 * qdict_find(): List lookup function
87 static QDictEntry *qdict_find(const QDict *qdict,
88 const char *key, unsigned int hash)
90 QDictEntry *entry;
92 QLIST_FOREACH(entry, &qdict->table[hash], next)
93 if (!strcmp(entry->key, key))
94 return entry;
96 return NULL;
99 /**
100 * qdict_put_obj(): Put a new QObject into the dictionary
102 * Insert the pair 'key:value' into 'qdict', if 'key' already exists
103 * its 'value' will be replaced.
105 * This is done by freeing the reference to the stored QObject and
106 * storing the new one in the same entry.
108 * NOTE: ownership of 'value' is transferred to the QDict
110 void qdict_put_obj(QDict *qdict, const char *key, QObject *value)
112 unsigned int hash;
113 QDictEntry *entry;
115 hash = tdb_hash(key) % QDICT_HASH_SIZE;
116 entry = qdict_find(qdict, key, hash);
117 if (entry) {
118 /* replace key's value */
119 qobject_decref(entry->value);
120 entry->value = value;
121 } else {
122 /* allocate a new entry */
123 entry = alloc_entry(key, value);
124 QLIST_INSERT_HEAD(&qdict->table[hash], entry, next);
127 qdict->size++;
131 * qdict_get(): Lookup for a given 'key'
133 * Return a weak reference to the QObject associated with 'key' if
134 * 'key' is present in the dictionary, NULL otherwise.
136 QObject *qdict_get(const QDict *qdict, const char *key)
138 QDictEntry *entry;
140 entry = qdict_find(qdict, key, tdb_hash(key) % QDICT_HASH_SIZE);
141 return (entry == NULL ? NULL : entry->value);
145 * qdict_haskey(): Check if 'key' exists
147 * Return 1 if 'key' exists in the dict, 0 otherwise
149 int qdict_haskey(const QDict *qdict, const char *key)
151 unsigned int hash = tdb_hash(key) % QDICT_HASH_SIZE;
152 return (qdict_find(qdict, key, hash) == NULL ? 0 : 1);
156 * qdict_size(): Return the size of the dictionary
158 size_t qdict_size(const QDict *qdict)
160 return qdict->size;
164 * qdict_get_obj(): Get a QObject of a specific type
166 static QObject *qdict_get_obj(const QDict *qdict, const char *key,
167 qtype_code type)
169 QObject *obj;
171 obj = qdict_get(qdict, key);
172 assert(obj != NULL);
173 assert(qobject_type(obj) == type);
175 return obj;
179 * qdict_get_int(): Get an integer mapped by 'key'
181 * This function assumes that 'key' exists and it stores a
182 * QInt object.
184 * Return integer mapped by 'key'.
186 int64_t qdict_get_int(const QDict *qdict, const char *key)
188 QObject *obj = qdict_get_obj(qdict, key, QTYPE_QINT);
189 return qint_get_int(qobject_to_qint(obj));
193 * qdict_get_bool(): Get a bool mapped by 'key'
195 * This function assumes that 'key' exists and it stores a
196 * QBool object.
198 * Return bool mapped by 'key'.
200 int qdict_get_bool(const QDict *qdict, const char *key)
202 QObject *obj = qdict_get_obj(qdict, key, QTYPE_QBOOL);
203 return qbool_get_int(qobject_to_qbool(obj));
207 * qdict_get_qlist(): Get the QList mapped by 'key'
209 * This function assumes that 'key' exists and it stores a
210 * QList object.
212 * Return QList mapped by 'key'.
214 QList *qdict_get_qlist(const QDict *qdict, const char *key)
216 return qobject_to_qlist(qdict_get_obj(qdict, key, QTYPE_QLIST));
220 * qdict_get_str(): Get a pointer to the stored string mapped
221 * by 'key'
223 * This function assumes that 'key' exists and it stores a
224 * QString object.
226 * Return pointer to the string mapped by 'key'.
228 const char *qdict_get_str(const QDict *qdict, const char *key)
230 QObject *obj = qdict_get_obj(qdict, key, QTYPE_QSTRING);
231 return qstring_get_str(qobject_to_qstring(obj));
235 * qdict_get_try_int(): Try to get integer mapped by 'key'
237 * Return integer mapped by 'key', if it is not present in
238 * the dictionary or if the stored object is not of QInt type
239 * 'err_value' will be returned.
241 int64_t qdict_get_try_int(const QDict *qdict, const char *key,
242 int64_t err_value)
244 QObject *obj;
246 obj = qdict_get(qdict, key);
247 if (!obj || qobject_type(obj) != QTYPE_QINT)
248 return err_value;
250 return qint_get_int(qobject_to_qint(obj));
254 * qdict_get_try_str(): Try to get a pointer to the stored string
255 * mapped by 'key'
257 * Return a pointer to the string mapped by 'key', if it is not present
258 * in the dictionary or if the stored object is not of QString type
259 * NULL will be returned.
261 const char *qdict_get_try_str(const QDict *qdict, const char *key)
263 QObject *obj;
265 obj = qdict_get(qdict, key);
266 if (!obj || qobject_type(obj) != QTYPE_QSTRING)
267 return NULL;
269 return qstring_get_str(qobject_to_qstring(obj));
273 * qdict_iter(): Iterate over all the dictionary's stored values.
275 * This function allows the user to provide an iterator, which will be
276 * called for each stored value in the dictionary.
278 void qdict_iter(const QDict *qdict,
279 void (*iter)(const char *key, QObject *obj, void *opaque),
280 void *opaque)
282 int i;
283 QDictEntry *entry;
285 for (i = 0; i < QDICT_HASH_SIZE; i++) {
286 QLIST_FOREACH(entry, &qdict->table[i], next)
287 iter(entry->key, entry->value, opaque);
292 * qentry_destroy(): Free all the memory allocated by a QDictEntry
294 static void qentry_destroy(QDictEntry *e)
296 assert(e != NULL);
297 assert(e->key != NULL);
298 assert(e->value != NULL);
300 qobject_decref(e->value);
301 qemu_free(e->key);
302 qemu_free(e);
306 * qdict_del(): Delete a 'key:value' pair from the dictionary
308 * This will destroy all data allocated by this entry.
310 void qdict_del(QDict *qdict, const char *key)
312 QDictEntry *entry;
314 entry = qdict_find(qdict, key, tdb_hash(key) % QDICT_HASH_SIZE);
315 if (entry) {
316 QLIST_REMOVE(entry, next);
317 qentry_destroy(entry);
318 qdict->size--;
323 * qdict_destroy_obj(): Free all the memory allocated by a QDict
325 static void qdict_destroy_obj(QObject *obj)
327 int i;
328 QDict *qdict;
330 assert(obj != NULL);
331 qdict = qobject_to_qdict(obj);
333 for (i = 0; i < QDICT_HASH_SIZE; i++) {
334 QDictEntry *entry = QLIST_FIRST(&qdict->table[i]);
335 while (entry) {
336 QDictEntry *tmp = QLIST_NEXT(entry, next);
337 QLIST_REMOVE(entry, next);
338 qentry_destroy(entry);
339 entry = tmp;
343 qemu_free(qdict);