1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/* M-runtime for c++
* Copyright (C) 2005-2008 Vladimir Menshakov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "file.h"
#include "ioexception.h"
#include "chunk.h"
#include <sys/types.h>
#include <sys/stat.h>
#ifndef _WINDOWS
#include <unistd.h>
#endif
using namespace mrt;
File::File():_f(NULL) {}
void File::open(const std::string &fname, const std::string &mode) {
_f = fopen(fname.c_str(), mode.c_str());
if (_f == NULL)
throw_io(("fopen(\"%s\", \"%s\")", fname.c_str(), mode.c_str()))
}
bool File::opened() const {
return _f != NULL;
}
const off_t File::get_size() const {
struct stat s;
int fno = fileno(_f);
if (fstat(fno, &s) != 0)
throw_io(("fstat"));
return s.st_size;
}
void File::write(const Chunk &ch) const {
if (fwrite(ch.get_ptr(), 1, ch.get_size(), _f) != ch.get_size())
throw_io(("fwrite"));
}
bool File::readline(std::string &str, const size_t bufsize) const {
if (_f == NULL)
throw_ex(("readline on closed file"));
mrt::Chunk buf;
buf.set_size(bufsize);
if (fgets((char *)buf.get_ptr(), buf.get_size(), _f) == NULL)
return false;
str.assign((const char *)buf.get_ptr());
return true;
}
const size_t File::read(void *buf, const size_t size) const {
size_t r = fread(buf, 1, size, _f);
if (r == (size_t)-1)
throw_io(("read(%p, %u)", buf, (unsigned)size));
return r;
}
bool File::eof() const {
int r = feof(_f);
if (r == -1)
throw_io(("feof"));
return r != 0;
}
void File::close() {
if (_f != NULL) {
fclose(_f);
_f = NULL;
}
}
FILE * File::unlink() {
FILE * r = _f;
_f = NULL;
return r;
}
void File::seek(long offset, int whence) const {
if (_f == NULL)
throw_ex(("seek(%ld, %d) on uninitialized file", offset, whence));
if (fseek(_f, offset, whence) == -1)
throw_io(("seek(%ld, %d)", offset, whence));
}
long File::tell() const {
if (_f == NULL)
throw_ex(("tell() on uninitialized file"));
return ftell(_f);
}
File::~File() {
close();
}
|
