http://cpp.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4?format=rss Tribe.net. Local Connections http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#95e5e6a8-024e-4815-8e31-59695092136f Just out of curiosity why didnt you do this: boost::scoped_array<unsigned char>pBuf(new unsigned char[512 *1024]); You said you were needing an array of unsigned chars, not unsigned char * and if scoped_array doesnt work (it has some limitations) try shared_array (also in boost). Perhaps I just didnt fully understand you implementation but it seems to me if you change your statement it will do what you want. I have only been using boost a very short time, but I tell you I am sold on it, also be very careful with vectors under certain conditions the pointers, references and iterators can be invalidated without your realizing it. I used to be sold on vectors, now I find other containers more to my liking ;-) to each his own. Sat, 15 Jul 2006 19:14:37 GMT http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#95e5e6a8-024e-4815-8e31-59695092136f Steve 2006-07-15T19:14:37Z http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#1b96d20a-f250-48c4-b897-2ec0ea3575a7 &v[0] is the pointer to the beginning, as is &*v.begin(). v.begin() itself is not guaranteed to be a pointer, and it many implementations it is not. For more information, read Effective STL. Mon, 19 Jun 2006 02:13:40 GMT http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#1b96d20a-f250-48c4-b897-2ec0ea3575a7 Ben 2006-06-19T02:13:40Z http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#1123ab22-926f-40ef-8a37-13a7c7bbd60a It'll work fine, std::vector::begin() is your unsigned char pointer. Mon, 19 Jun 2006 02:04:09 GMT http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#1123ab22-926f-40ef-8a37-13a7c7bbd60a Scott 2006-06-19T02:04:09Z http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#fae6aa19-8377-439b-88aa-4d2a1283a780 Scott, Yes, I also consider a vector, but I need to mix this (for now) with old C-style APIs like fread / fwrite, which expect unsigned char pointers. Will std::vectors' ++ and [] operators "fool" fread / fwrite into thinking that they're dealing with an unsigned char *? I don't know -- I guess it's something to experiment with :-) Regards, John Falling You - exploring the beauty of voice and sound http://www.fallingyou.com Mon, 19 Jun 2006 01:51:30 GMT http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#fae6aa19-8377-439b-88aa-4d2a1283a780 John Michael 2006-06-19T01:51:30Z http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#e417f990-9015-4e8a-8937-c508397e7cd7 std::vector<unsigned char> Mon, 19 Jun 2006 01:30:54 GMT http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#e417f990-9015-4e8a-8937-c508397e7cd7 Scott 2006-06-19T01:30:54Z http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#f8a5f244-f0fe-4705-9777-028fbeff5ee3 Hello, all ... I want to use a smart pointer, preferably boosty, to encapsulate an array of unsigned chars that I need to allocate from the heap: int main() { unsigned char *pBuf = new unsigned char[ 512 * 1024 ]; // icky, this isn't quite smart enough :-) auto_ptr< unsigned char * > pBuf( new unsigned char[ 512 * 1024 ] ); // no work, auto_ptr dtor does not call delete[] boost::scoped_array< unsigned char *> pBuf( new unsigned char[ 512 * 1024 ] ); // no work, boost expect an array of unsigned char pointers here, not an array of unsigned chars // the thing I kinda need to do is ... fread( pBuf, 1, lotsa_bytes, pFile ); } ... any hints? I'm not new to smart pointers, but I am kinda new to boost ... Regards, John Falling You - exploring the beauty of voice and sound http://www.fallingyou.com Mon, 19 Jun 2006 00:13:24 GMT http://CPP.tribe.net/thread/71df2db6-9882-49c0-b811-980f21e520e4#f8a5f244-f0fe-4705-9777-028fbeff5ee3 John Michael 2006-06-19T00:13:24Z