From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,91fb0c338516ed9 X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news3.google.com!news.glorb.com!newshub.sdsu.edu!elnk-nf2-pas!newsfeed.earthlink.net!stamper.news.pas.earthlink.net!newsread1.news.pas.earthlink.net.POSTED!a6202946!not-for-mail From: Jeffrey Carter Organization: jrcarter commercial-at acm [period | full stop] org User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.3) Gecko/20040910 X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: Getting length of array from C References: <1107231381.627097.52490@c13g2000cwb.googlegroups.com> <1107244808.d76a000ed3c64143f06cacb757120823@teranews> <1107263868.447580.257310@z14g2000cwz.googlegroups.com> In-Reply-To: <1107263868.447580.257310@z14g2000cwz.googlegroups.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Message-ID: Date: Wed, 02 Feb 2005 00:15:24 GMT NNTP-Posting-Host: 63.186.49.133 X-Complaints-To: abuse@earthlink.net X-Trace: newsread1.news.pas.earthlink.net 1107303324 63.186.49.133 (Tue, 01 Feb 2005 16:15:24 PST) NNTP-Posting-Date: Tue, 01 Feb 2005 16:15:24 PST Xref: g2news1.google.com comp.lang.ada:8124 Date: 2005-02-02T00:15:24+00:00 List-Id: Chuck wrote: > procedure Write_Array( my_array : in My_Array_Type ); > pragma Import( C, Write_Array, "c_write_array" ); > > The C function prototype from the header file I was given is: > void c_write_array( void *array ); There isn't enough information here to know what c_write_array is doing with the array. You may have to look at the body to know how to use it. > In the C code is there anyway I can get the length of the incoming > array? So, is Ada actually passing in a structure or an array? > Hope this clears things up. The only way for C to know the length is to pass it as a 2nd parameter. Ada will pass a convention-C pointer to the array's 1st element. -- Jeff Carter "You cheesy lot of second-hand electric donkey-bottom biters." Monty Python & the Holy Grail 14