/* Copyright 2016 David Robillard Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /** @defgroup util Utilities @ingroup lv2core @{ */ #include "lv2/core/lv2.h" #include #include #include #ifdef __cplusplus extern "C" { #endif /** Return the data for a feature in a features array. If the feature is not found, NULL is returned. Note that this function is only useful for features with data, and can not detect features that are present but have NULL data. */ static inline void* lv2_features_data(const LV2_Feature*const* features, const char* const uri) { if (features) { for (const LV2_Feature*const* f = features; *f; ++f) { if (!strcmp(uri, (*f)->URI)) { return (*f)->data; } } } return NULL; } /** Query a features array. This function allows getting several features in one call, and detect missing required features, with the same caveat of lv2_features_data(). The arguments should be a series of const char* uri, void** data, bool required, terminated by a NULL URI. The data pointers MUST be initialized to NULL. For example: @code LV2_URID_Log* log = NULL; LV2_URID_Map* map = NULL; const char* missing = lv2_features_query( features, LV2_LOG__log, &log, false, LV2_URID__map, &map, true, NULL); @endcode @return NULL on success, otherwise the URI of this missing feature. */ static inline const char* lv2_features_query(const LV2_Feature* const* features, ...) { va_list args; va_start(args, features); const char* uri = NULL; while ((uri = va_arg(args, const char*))) { void** data = va_arg(args, void**); bool required = va_arg(args, int); *data = lv2_features_data(features, uri); if (required && !*data) { return uri; } } return NULL; } #ifdef __cplusplus } /* extern "C" */ #endif /** @} @} */ lv2.git/tree/waf?h=c%2b%2b&id=87219a7777bced54ede27ce2065c1a07a0d40213'>waf
blob: 0c83e746ae3a944c4150f8600756a7306b901f72 (plain) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169