fcobjs.c revision c9710b42 
1/*
2 * fontconfig/src/fclist.c
3 *
4 * Copyright © 2000 Keith Packard
5 *
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the name of the author(s) not be used in
11 * advertising or publicity pertaining to distribution of the software without
12 * specific, written prior permission.  The authors make no
13 * representations about the suitability of this software for any purpose.  It
14 * is provided "as is" without express or implied warranty.
15 *
16 * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
17 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
18 * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
19 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
20 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
21 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
22 * PERFORMANCE OF THIS SOFTWARE.
23 */
24
25#include "fcint.h"
26
27static unsigned int
28FcObjectTypeHash (register const char *str, register unsigned int len);
29
30static const struct FcObjectTypeInfo *
31FcObjectTypeLookup (register const char *str, register unsigned int len);
32
33#include "fcobjshash.h"
34
35#include <string.h>
36
37/* The 1000 is to leave some room for future added internal objects, such
38 * that caches from newer fontconfig can still be used with older fontconfig
39 * without getting confused. */
40static fc_atomic_int_t next_id = FC_MAX_BASE_OBJECT + 1000;
41struct FcObjectOtherTypeInfo {
42    struct FcObjectOtherTypeInfo *next;
43    FcObjectType object;
44    FcObject id;
45} *other_types;
46
47static FcObjectType *
48_FcObjectLookupOtherTypeByName (const char *str, FcObject *id)
49{
50    struct FcObjectOtherTypeInfo *ots, *ot;
51
52retry:
53    ots = fc_atomic_ptr_get (&other_types);
54
55    for (ot = ots; ot; ot = ot->next)
56	if (0 == strcmp (ot->object.object, str))
57	    break;
58
59    if (!ot)
60    {
61	ot = malloc (sizeof (*ot));
62	if (!ot)
63	    return NULL;
64
65	ot->object.object = (const char *) FcStrdup (str);
66	ot->object.type = -1;
67	ot->id = fc_atomic_int_add (next_id, +1);
68	ot->next = ots;
69
70	if (!fc_atomic_ptr_cmpexch (&other_types, ots, ot)) {
71	    free (ot);
72	    goto retry;
73	}
74    }
75
76    if (id)
77      *id = ot->id;
78
79    return &ot->object;
80}
81
82FcObject
83FcObjectLookupBuiltinIdByName (const char *str)
84{
85    const struct FcObjectTypeInfo *o = FcObjectTypeLookup (str, strlen (str));
86
87    if (o)
88	return o->id;
89
90    return 0;
91}
92
93FcObject
94FcObjectLookupIdByName (const char *str)
95{
96    const struct FcObjectTypeInfo *o = FcObjectTypeLookup (str, strlen (str));
97    FcObject id;
98    if (o)
99	return o->id;
100
101    if (_FcObjectLookupOtherTypeByName (str, &id))
102	return id;
103
104    return 0;
105}
106
107const char *
108FcObjectLookupOtherNameById (FcObject id)
109{
110    struct FcObjectOtherTypeInfo *ot;
111
112    for (ot = fc_atomic_ptr_get (&other_types); ot; ot = ot->next)
113	if (ot->id == id)
114	    return ot->object.object;
115
116    return NULL;
117}
118
119const FcObjectType *
120FcObjectLookupOtherTypeByName (const char *str)
121{
122    return _FcObjectLookupOtherTypeByName (str, NULL);
123}
124
125FcPrivate const FcObjectType *
126FcObjectLookupOtherTypeById (FcObject id)
127{
128    struct FcObjectOtherTypeInfo *ot;
129
130    for (ot = fc_atomic_ptr_get (&other_types); ot; ot = ot->next)
131	if (ot->id == id)
132	    return &ot->object;
133
134    return NULL;
135}
136
137
138#include "fcaliastail.h"
139#undef __fcobjs__
140