blargh by godecho

1

#include <iostream> #include <vector> using namespace std; typedef std::vector<unsigned char> ByteStream; struct ByteStreamHandle {     ByteStreamHandle(const ByteStream& inStream)         : stream(inStream),           position(0)     {              }          const ByteStream& stream;     long position; }; unsigned int streamRead(void* buffer, unsigned int size, unsigned int count, void* handle) {     ByteStreamHandle* byteStream = (ByteStreamHandle*)handle;          const unsigned char* rawStream = &byteStream->stream[0];     long begin = byteStream->position;     long end   = min(static_cast<long>(byteStream->stream.size()), static_cast<long>(begin + (size*count)));          copy(rawStream+begin, rawStream+end, (char*)buffer);     //memcpy(buffer, rawStream+begin, end-begin);     byteStream->position += end-begin;          return end-begin; } int streamSeek(void* handle, long offset, int origin) {     ByteStreamHandle* byteStream = (ByteStreamHandle*)handle;          switch(origin)     {         case SEEK_SET: byteStream->position = 0; break;         case SEEK_CUR: break;         case SEEK_END: byteStream->position = byteStream->stream.size(); break;         default: return -1;     }     if((byteStream->position + offset) > static_cast<long>(byteStream->stream.size()) ||        (byteStream->position + offset) < 0)     {         return -1;  // Error, we're trying to seek past the beginning or end of the stream     }     else     {         byteStream->position += offset;         return 0;     } } long streamTell(void* handle) {     return ((ByteStreamHandle*)handle)->position; } int main(int argc, char** argv) {     ByteStream stream;     ByteStreamHandle handle(stream);     stream.resize(10);     unsigned char buffer[10];     // put something in our stream     for(int x = 0; x < stream.size(); ++x)     {         stream[x] = x;     }     // read each element out of the stream, one at a time     for(int x = 0; x < 10; ++x)     {         cout << "reading from position " << streamTell((void*)&handle) << endl;         streamRead(buffer+x, sizeof(unsigned char), 1, (void*)&handle);     }     // print buffer     for(int x = 0; x < 10; ++x)     {         cout << int(buffer[x]) << endl;     }     return 0; }