/*

Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:

The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

*/
module derelict.nanomsg.functions;

private {
    import core.stdc.stdio;
    import core.stdc.stdarg;
    import derelict.util.system;
    import derelict.nanomsg.types;
}

extern( C ) @nogc nothrow {	
    alias int function() da_nanomsg_nn_errno;
    alias const char* function(int) da_nanomsg_nn_strerror;
    alias const char* function(int, int*) da_nanomsg_nn_symbol;
    alias int function(int, nn_symbol_properties*, int) da_nanomsg_nn_symbol_info;
    alias void* function(size_t size, int type) da_nanomsg_nn_term;
    alias void* function(void* msg, size_t size) da_nanomsg_nn_allocmsg;
    alias int function(void*) da_nanomsg_nn_freemsg;
	
	version(none) {
		alias nn_cmsghdr* function(const nn_msghdr*, const nn_cmsghdr*) da_nanomsg_nn_cmsg_nxthdr_;
			
		auto NN_CMSG_ALIGN(T)(T len) {
			return (len + size_t.sizeof - 1) & (size_t) ~ (size_t.sizeof - 1);
		}


		/* POSIX-defined msghdr manipulation. */
		auto NN_CMSG_FIRSTHDR(T)(T mhdr) {
			return nn_cmsg_nxthdr_(cast(nn_msghdr*)mhdr, null);
		}
		auto NN_CMSG_NXTHDR(T, K)(T mhdr, K cmsg) {
			return nn_cmsg_nxthdr_(cast(nn_msghdr*)mhdr, cast(nn_cmsghdr*)cmsg);
		}
		auto NN_CMSG_DATA(T)(T cmsg) {
			return cast(ubyte*)((cast(nn_cmsghdr*)cmsg) + 1);
		}


		/* Extensions to POSIX defined by RFC 3542.                                   */

		auto NN_CMSG_SPACE(T)(T len) {
			return NN_CMSG_ALIGN_(len) + NN_CMSG_ALIGN_(nn_cmsghdr.sizeof);
		}
			
		auto NN_CMSG_LEN(T)(T len) {
			return NN_CMSG_ALIGN_(nn_cmsghdr.sizeof) + len;
		}
		
	}	
	
    alias int function(int, int) da_nanomsg_nn_socket;
    alias int function(int) da_nanomsg_nn_close;
    alias int function(int, int, int, const void*, size_t) da_nanomsg_nn_setsockopt;
    alias int function(int, int, int, void*, size_t*) da_nanomsg_nn_getsockopt;
    alias int function(int, const char*) da_nanomsg_nn_bind;
    alias int function(int, const char*) da_nanomsg_nn_connect;
    alias int function(int, int) da_nanomsg_nn_shutdown;
    alias int function(int, const void*, size_t, int) da_nanomsg_nn_send;
    alias int function(int, void*, size_t, int) da_nanomsg_nn_recv;
    alias int function(int, const nn_msghdr*, int) da_nanomsg_nn_sendmsg;
    alias int function(int, nn_msghdr*, int) da_nanomsg_nn_recvmsg;
    alias int function(nn_pollfd*, int, int) da_nanomsg_nn_poll;
    alias int function(int, int) da_nanomsg_nn_device;
}

__gshared {
	da_nanomsg_nn_errno nn_errno;
	da_nanomsg_nn_strerror nn_strerror;
	da_nanomsg_nn_symbol nn_symbol;
	da_nanomsg_nn_symbol_info nn_symbol_info;
	da_nanomsg_nn_term nn_term;
	da_nanomsg_nn_allocmsg nn_allocmsg;
	da_nanomsg_nn_freemsg nn_freemsg;
	
	version(none) {
		//...
	}
	
	da_nanomsg_nn_socket nn_socket;
	da_nanomsg_nn_close nn_close;
	da_nanomsg_nn_setsockopt nn_setsockopt;
	da_nanomsg_nn_getsockopt nn_getsockopt;
	da_nanomsg_nn_bind nn_bind;
	da_nanomsg_nn_connect nn_connect;
	da_nanomsg_nn_shutdown nn_shutdown;
	da_nanomsg_nn_send nn_send;
	da_nanomsg_nn_recv nn_recv;
	da_nanomsg_nn_sendmsg nn_sendmsg;
	da_nanomsg_nn_recvmsg nn_recvmsg;
	da_nanomsg_nn_poll nn_poll;
	da_nanomsg_nn_device nn_device;
}