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ad570151
编写于
12月 25, 2019
作者:
Y
YuQing
浏览文件
操作
浏览文件
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电子邮件补丁
差异文件
add buffered_file_writer.[hc] files
上级
2992bfc4
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
286 addition
and
0 deletion
+286
-0
src/buffered_file_writer.c
src/buffered_file_writer.c
+214
-0
src/buffered_file_writer.h
src/buffered_file_writer.h
+72
-0
未找到文件。
src/buffered_file_writer.c
0 → 100644
浏览文件 @
ad570151
/**
* Copyright (C) 2008 Happy Fish / YuQing
*
* FastDFS may be copied only under the terms of the GNU General
* Public License V3, which may be found in the FastDFS source kit.
* Please visit the FastDFS Home Page http://www.fastken.com/ for more detail.
**/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdarg.h>
#include "shared_func.h"
#include "logger.h"
#include "buffered_file_writer.h"
int
buffered_file_writer_open_ex
(
BufferedFileWriter
*
writer
,
const
char
*
filename
,
const
int
buffer_size
,
const
int
max_written_once
,
const
int
mode
)
{
int
result
;
int
written_once
;
writer
->
buffer_size
=
(
buffer_size
>
0
)
?
buffer_size
:
64
*
1024
;
written_once
=
(
max_written_once
>
0
)
?
max_written_once
:
256
;
if
(
written_once
>
writer
->
buffer_size
)
{
logError
(
"file: "
__FILE__
", line: %d, "
"max_written_once: %d > buffer_size: %d"
,
__LINE__
,
written_once
,
writer
->
buffer_size
);
return
EINVAL
;
}
writer
->
buff
=
(
char
*
)
malloc
(
writer
->
buffer_size
);
if
(
writer
->
buff
==
NULL
)
{
logError
(
"file: "
__FILE__
", line: %d, "
"malloc %d bytes fail"
,
__LINE__
,
writer
->
buffer_size
);
return
ENOMEM
;
}
snprintf
(
writer
->
filename
,
sizeof
(
writer
->
filename
),
"%s"
,
filename
);
writer
->
fd
=
open
(
writer
->
filename
,
O_WRONLY
|
O_CREAT
|
O_TRUNC
,
mode
);
if
(
writer
->
fd
<
0
)
{
result
=
errno
!=
0
?
errno
:
EIO
;
logError
(
"file: "
__FILE__
", line: %d, "
"open file %s fail, "
"errno: %d, error info: %s"
,
__LINE__
,
writer
->
filename
,
result
,
STRERROR
(
result
));
free
(
writer
->
buff
);
writer
->
buff
=
NULL
;
return
result
;
}
writer
->
current
=
writer
->
buff
;
writer
->
buff_end
=
writer
->
buff
+
writer
->
buffer_size
;
writer
->
water_mark
=
writer
->
buff_end
-
written_once
;
return
0
;
}
int
buffered_file_writer_close
(
BufferedFileWriter
*
writer
)
{
int
result
;
if
(
writer
->
buff
==
NULL
)
{
return
EINVAL
;
}
result
=
buffered_file_writer_flush
(
writer
);
if
(
result
==
0
&&
fsync
(
writer
->
fd
)
!=
0
)
{
result
=
errno
!=
0
?
errno
:
EIO
;
logError
(
"file: "
__FILE__
", line: %d, "
"fsync file %s fail, "
"errno: %d, error info: %s"
,
__LINE__
,
writer
->
filename
,
result
,
STRERROR
(
result
));
}
if
(
close
(
writer
->
fd
)
!=
0
)
{
if
(
result
==
0
)
{
result
=
errno
!=
0
?
errno
:
EIO
;
}
logError
(
"file: "
__FILE__
", line: %d, "
"close file %s fail, "
"errno: %d, error info: %s"
,
__LINE__
,
writer
->
filename
,
errno
,
STRERROR
(
errno
));
}
free
(
writer
->
buff
);
writer
->
buff
=
NULL
;
return
result
;
}
int
buffered_file_writer_flush
(
BufferedFileWriter
*
writer
)
{
int
result
;
int
len
;
len
=
writer
->
current
-
writer
->
buff
;
if
(
len
==
0
)
{
return
0
;
}
if
(
fc_safe_write
(
writer
->
fd
,
writer
->
buff
,
len
)
!=
len
)
{
result
=
errno
!=
0
?
errno
:
EIO
;
logError
(
"file: "
__FILE__
", line: %d, "
"write to file %s fail, "
"errno: %d, error info: %s"
,
__LINE__
,
writer
->
filename
,
result
,
STRERROR
(
result
));
return
result
;
}
writer
->
current
=
writer
->
buff
;
return
0
;
}
int
buffered_file_writer_append
(
BufferedFileWriter
*
writer
,
const
char
*
format
,
...)
{
va_list
ap
;
int
result
;
int
remain_size
;
int
len
;
int
i
;
result
=
0
;
for
(
i
=
0
;
i
<
2
;
i
++
)
{
remain_size
=
writer
->
buff_end
-
writer
->
current
;
va_start
(
ap
,
format
);
len
=
vsnprintf
(
writer
->
current
,
remain_size
,
format
,
ap
);
va_end
(
ap
);
if
(
len
<
remain_size
)
{
writer
->
current
+=
len
;
if
(
writer
->
current
>
writer
->
water_mark
)
{
result
=
buffered_file_writer_flush
(
writer
);
}
break
;
}
if
(
len
>
writer
->
buffer_size
)
{
result
=
ENOSPC
;
logError
(
"file: "
__FILE__
", line: %d, "
"too large output buffer, %d > %d!"
,
__LINE__
,
len
,
writer
->
buffer_size
);
break
;
}
//maybe full, try again
if
((
result
=
buffered_file_writer_flush
(
writer
))
!=
0
)
{
break
;
}
}
return
result
;
}
int
buffered_file_writer_append_buff
(
BufferedFileWriter
*
writer
,
const
char
*
buff
,
const
int
len
)
{
int
result
;
if
(
len
>=
writer
->
water_mark
-
writer
->
current
)
{
if
((
result
=
buffered_file_writer_flush
(
writer
))
!=
0
)
{
return
result
;
}
if
(
fc_safe_write
(
writer
->
fd
,
buff
,
len
)
!=
len
)
{
result
=
errno
!=
0
?
errno
:
EIO
;
logError
(
"file: "
__FILE__
", line: %d, "
"write to file %s fail, "
"errno: %d, error info: %s"
,
__LINE__
,
writer
->
filename
,
result
,
STRERROR
(
result
));
return
result
;
}
return
0
;
}
memcpy
(
writer
->
current
,
buff
,
len
);
writer
->
current
+=
len
;
if
(
writer
->
current
>
writer
->
water_mark
)
{
return
buffered_file_writer_flush
(
writer
);
}
return
0
;
}
src/buffered_file_writer.h
0 → 100644
浏览文件 @
ad570151
/**
* Copyright (C) 2008 Happy Fish / YuQing
*
* FastDFS may be copied only under the terms of the GNU General
* Public License V3, which may be found in the FastDFS source kit.
* Please visit the FastDFS Home Page http://www.fastken.com/ for more detail.
**/
#ifndef BUFFERED_FILE_WRITER_H
#define BUFFERED_FILE_WRITER_H
#include "common_define.h"
typedef
struct
{
int
fd
;
int
buffer_size
;
char
filename
[
MAX_PATH_SIZE
];
char
*
buff
;
char
*
current
;
char
*
buff_end
;
char
*
water_mark
;
}
BufferedFileWriter
;
#ifdef __cplusplus
extern
"C"
{
#endif
/** open buffered file writer
* parameters:
* writer: the writer
* filename: the filename to write
* buffer_size: the buffer size, <= 0 for recommend 64KB
* max_written_once: max written bytes per call, <= 0 for 256
* mode: the file privilege such as 0644
* return: error code, 0 for success, != 0 for errno
*/
int
buffered_file_writer_open_ex
(
BufferedFileWriter
*
writer
,
const
char
*
filename
,
const
int
buffer_size
,
const
int
max_written_once
,
const
int
mode
);
static
inline
int
buffered_file_writer_open
(
BufferedFileWriter
*
writer
,
const
char
*
filename
)
{
const
int
buffer_size
=
0
;
const
int
max_written_once
=
0
;
const
int
mode
=
0644
;
return
buffered_file_writer_open_ex
(
writer
,
filename
,
buffer_size
,
max_written_once
,
mode
);
}
/** close buffered file writer
* parameters:
* writer: the writer
* return: error code, 0 for success, != 0 for errno
*/
int
buffered_file_writer_close
(
BufferedFileWriter
*
writer
);
int
buffered_file_writer_append
(
BufferedFileWriter
*
writer
,
const
char
*
format
,
...);
int
buffered_file_writer_append_buff
(
BufferedFileWriter
*
writer
,
const
char
*
buff
,
const
int
len
);
int
buffered_file_writer_flush
(
BufferedFileWriter
*
writer
);
#ifdef __cplusplus
}
#endif
#endif
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