how to get argument number

From: 帅猛 <shuaimeng(at)db(dot)pku(dot)edu(dot)cn>
To: pgsql-general(at)postgresql(dot)org <pgsql-general(at)postgresql(dot)org>
Subject: how to get argument number
Date: 2002-11-30 16:08:30
Message-ID: 200211302356328.SM01104@shm
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I create a funtion with C ,i want to know how many argument number i have got;
which macro i can use?,PG_GETARGV_INT16 or other macro ? thanks!

　　　　　　　　
　　　　　　　　shuaimeng(at)db(dot)pku(dot)edu(dot)cn
　　　　　　　　　　2002-12-01

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