1 /*
2 Copyright 2005-2007 Adobe Systems Incorporated
3
4 Use, modification and distribution are subject to the Boost Software License,
5 Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6 http://www.boost.org/LICENSE_1_0.txt).
7
8 See http://opensource.adobe.com/gil for most recent version including documentation.
9 */
10 /*************************************************************************************************/
11
12 #ifndef GIL_IO_ERROR_H
13 #define GIL_IO_ERROR_H
14
15 /// \file
16 /// \brief Handle input-output errors
17 /// \author Lubomir Bourdev and Hailin Jin \n
18 /// Adobe Systems Incorporated
19 /// \date 2005-2007 \n Last updated on May 30, 2006
20
21 #include <ios>
22 #include "../../gil_config.hpp"
23 #include <boost/shared_ptr.hpp>
24
25 namespace boost { namespace gil {
26
io_error(const char * descr)27 inline void io_error(const char* descr) { throw std::ios_base::failure(descr); }
io_error_if(bool expr,const char * descr="")28 inline void io_error_if(bool expr, const char* descr="") { if (expr) io_error(descr); }
29
30 namespace detail {
31 class file_mgr {
32 protected:
33 shared_ptr<FILE> _fp;
34
operator ()boost::gil::detail::file_mgr::null_deleter35 struct null_deleter { void operator()(void const*) const {} };
file_mgr(FILE * file)36 file_mgr(FILE* file) : _fp(file, null_deleter()) {}
37
file_mgr(const char * filename,const char * flags)38 file_mgr(const char* filename, const char* flags) {
39 FILE* fp;
40 io_error_if((fp=fopen(filename,flags))==NULL, "file_mgr: failed to open file");
41 _fp=shared_ptr<FILE>(fp,fclose);
42 }
43
44 public:
get()45 FILE* get() { return _fp.get(); }
46 };
47 }
48
49 } } // namespace boost::gil
50
51 #endif
52