GNU Radio 3.6.5 C++ API

file_descriptor_source_impl.h

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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2004,2013 Free Software Foundation, Inc.
00004  *
00005  * This file is part of GNU Radio
00006  *
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  *
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef INCLUDED_GR_FILE_DESCRIPTOR_SOURCE_IMPL_H
00024 #define INCLUDED_GR_FILE_DESCRIPTOR_SOURCE_IMPL_H
00025 
00026 #include <blocks/file_descriptor_source.h>
00027 
00028 namespace gr {
00029   namespace blocks {
00030 
00031     class file_descriptor_source_impl : public file_descriptor_source
00032     {
00033     private:
00034       size_t d_itemsize;
00035       int    d_fd;
00036       bool   d_repeat;
00037 
00038       unsigned char *d_residue;
00039       unsigned long  d_residue_len;
00040 
00041     protected:
00042       int read_items(char *buf, int nitems);
00043       int handle_residue(char *buf, int nbytes_read);
00044       void flush_residue() { d_residue_len = 0; }
00045 
00046     public:
00047       file_descriptor_source_impl(size_t itemsize, int fd, bool repeat);
00048       ~file_descriptor_source_impl();
00049 
00050       int work(int noutput_items,
00051                gr_vector_const_void_star &input_items,
00052                gr_vector_void_star &output_items);
00053     };
00054 
00055   } /* namespace blocks */
00056 } /* namespace gr */
00057 
00058 #endif /* INCLUDED_GR_FILE_DESCRIPTOR_SOURCE_IMPL_H */