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59 lines
1.9 KiB
59 lines
1.9 KiB
/**
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* \file
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* Interface definition code. Each interface is a set of selector functions
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* as well as a data structure where the concrete implementation will be stored.
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* This structure is the intergrated in the class that implements the
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* interface.
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*
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* \author Georg Hopp
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*
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* \copyright
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* Copyright © 2012 Georg Hopp
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __INTERFACE_H__
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#define __INTERFACE_H__
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#include <sys/types.h>
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#define MAX_IFACE 32 // ATTENTION: every iface_impl will use MAX_IFACE * sizeof(void*)
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#define IFACE(name) ((const struct i_##name const*)&i_##name##_impl)
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#define INIT_IFACE(name,...) \
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static const struct i_##name i_##name##_impl = {&i_##name,__VA_ARGS__}
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#define NUMARGS(...) (sizeof((const void*[]){__VA_ARGS__})/sizeof(void*))
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#define INIT_IMPL(...) {NUMARGS(__VA_ARGS__), 0, {__VA_ARGS__}}
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struct interface {
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const char * name;
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const size_t nmethods;
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};
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typedef const struct interface * iface_ptr;
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struct iface_impl {
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const size_t nimpl; // number of interface implementations
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char simpl; // implementations sorted??
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const void * impl[MAX_IFACE]; // implementations
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};
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typedef struct iface_impl * iface_impl_ptr;
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extern struct interface * interfaceGet(iface_impl_ptr, const iface_ptr);
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#endif // __INTERFACE_H__
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// vim: set ts=4 sw=4:
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