RESTinio
sendfile_defs_default.hpp
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1 /*
2  restinio
3 */
4 
11 #pragma once
12 
13 #include <cstdio>
14 
15 namespace restinio
16 {
17 
20 using file_descriptor_t = std::FILE*;
22 using file_offset_t = std::int64_t;
23 using file_size_t = std::uint64_t;
25 
26 
33 
36 constexpr file_descriptor_t null_file_descriptor(){ return nullptr; }
37 
39 inline file_descriptor_t
40 open_file( const char * file_path )
41 {
42  file_descriptor_t file_descriptor = std::fopen( file_path, "rb" );
43 
44  if( null_file_descriptor() == file_descriptor )
45  {
46  throw exception_t{ fmt::format( "std::fopen failed: '{}'", file_path ) };
47  }
48 
49  return file_descriptor;
50 }
51 
53 template < typename META >
54 META
56 {
57  file_size_t fsize = 0;
58 
59  if( null_file_descriptor() != fd )
60  {
61  // Obtain file size:
62  if( 0 == std::fseek( fd , 0 , SEEK_END ) )
63  {
64  const auto end_pos = std::ftell( fd );
65 
66  if( -1 != end_pos )
67  {
68  fsize = static_cast< file_size_t >( end_pos );
69  std::rewind( fd );
70  }
71  else
72  {
73  throw exception_t{ "std::ftell failed" };
74  }
75  }
76  else
77  {
78  throw exception_t{ "std::fseek failed" };
79  }
80  }
81 
82  // No way to get last modification,
83  // Use current time instead.
84  return META{ fsize, std::chrono::system_clock::now() };
85 }
86 
88 inline void
90 {
91  std::fclose( fd );
92 }
94 
95 } /* namespace restinio */
restinio::exception_t
Exception class for all exceptions thrown by RESTinio.
Definition: exception.hpp:26
SEEK_END
#define SEEK_END
Definition: zconf.h:500
restinio::file_size_t
std::uint64_t file_size_t
Definition: sendfile_defs_default.hpp:23
restinio::file_descriptor_t
std::FILE * file_descriptor_t
Definition: sendfile_defs_default.hpp:21
restinio::file_offset_t
std::int64_t file_offset_t
Definition: sendfile_defs_default.hpp:22
restinio::close_file
void close_file(file_descriptor_t fd)
Close file by its descriptor.
Definition: sendfile_defs_default.hpp:89
restinio::open_file
file_descriptor_t open_file(const char *file_path)
Open file.
Definition: sendfile_defs_default.hpp:40
restinio::get_file_meta
META get_file_meta(file_descriptor_t fd)
Get file size.
Definition: sendfile_defs_default.hpp:55
restinio::null_file_descriptor
constexpr file_descriptor_t null_file_descriptor()
Get file descriptor which stands for null.
Definition: sendfile_defs_default.hpp:36
restinio
Definition: asio_include.hpp:21