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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
/* USE_MY_STREAM isn't set because we can't thrust my_fclose! */
#include "mysys_priv.h"
#include "mysys_err.h"
#include <errno.h>
#include <stdio.h>
#ifdef HAVE_FSEEKO
#undef ftell
#undef fseek
#define ftell(A) ftello(A)
#define fseek(A,B,C) fseeko((A),(B),(C))
#endif
/*
Read a chunk of bytes from a FILE
SYNOPSIS
my_fread()
stream File descriptor
Buffer Buffer to read to
Count Number of bytes to read
MyFlags Flags on what to do on error
RETURN
(size_t) -1 Error
# Number of bytes read
*/
size_t my_fread(FILE *stream, uchar *Buffer, size_t Count, myf MyFlags)
{
size_t readbytes;
DBUG_ENTER("my_fread");
DBUG_PRINT("my",("stream: 0x%lx Buffer: 0x%lx Count: %u MyFlags: %lu",
(long) stream, (long) Buffer, (uint) Count, MyFlags));
if ((readbytes= fread(Buffer, sizeof(char), Count, stream)) != Count)
{
DBUG_PRINT("error",("Read only %d bytes", (int) readbytes));
if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
{
if (ferror(stream))
my_error(EE_READ, MYF(ME_BELL+ME_WAITTANG),
my_filename(my_fileno(stream)),errno);
else
if (MyFlags & (MY_NABP | MY_FNABP))
my_error(EE_EOFERR, MYF(ME_BELL+ME_WAITTANG),
my_filename(my_fileno(stream)),errno);
}
my_errno=errno ? errno : -1;
if (ferror(stream) || MyFlags & (MY_NABP | MY_FNABP))
DBUG_RETURN((size_t) -1); /* Return with error */
}
if (MyFlags & (MY_NABP | MY_FNABP))
DBUG_RETURN(0); /* Read ok */
DBUG_RETURN(readbytes);
} /* my_fread */
/*
Write a chunk of bytes to a stream
my_fwrite()
stream File descriptor
Buffer Buffer to write from
Count Number of bytes to write
MyFlags Flags on what to do on error
RETURN
(size_t) -1 Error
# Number of bytes written
*/
size_t my_fwrite(FILE *stream, const uchar *Buffer, size_t Count, myf MyFlags)
{
size_t writtenbytes =0;
my_off_t seekptr;
#if !defined(NO_BACKGROUND) && defined(USE_MY_STREAM)
uint errors;
#endif
DBUG_ENTER("my_fwrite");
DBUG_PRINT("my",("stream: 0x%lx Buffer: 0x%lx Count: %u MyFlags: %lu",
(long) stream, (long) Buffer, (uint) Count, MyFlags));
#if !defined(NO_BACKGROUND) && defined(USE_MY_STREAM)
errors=0;
#endif
seekptr= ftell(stream);
for (;;)
{
size_t written;
if ((written = (size_t) fwrite((char*) Buffer,sizeof(char),
Count, stream)) != Count)
{
DBUG_PRINT("error",("Write only %d bytes", (int) writtenbytes));
my_errno=errno;
if (written != (size_t) -1)
{
seekptr+=written;
Buffer+=written;
writtenbytes+=written;
Count-=written;
}
#ifdef EINTR
if (errno == EINTR)
{
(void) my_fseek(stream,seekptr,MY_SEEK_SET,MYF(0));
continue;
}
#endif
#if !defined(NO_BACKGROUND) && defined(USE_MY_STREAM)
if (my_thread_var->abort)
MyFlags&= ~ MY_WAIT_IF_FULL; /* End if aborted by user */
if ((errno == ENOSPC || errno == EDQUOT) &&
(MyFlags & MY_WAIT_IF_FULL))
{
wait_for_free_space("[stream]", errors);
errors++;
(void) my_fseek(stream,seekptr,MY_SEEK_SET,MYF(0));
continue;
}
#endif
if (ferror(stream) || (MyFlags & (MY_NABP | MY_FNABP)))
{
if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
{
my_error(EE_WRITE, MYF(ME_BELL+ME_WAITTANG),
my_filename(my_fileno(stream)),errno);
}
writtenbytes= (size_t) -1; /* Return that we got error */
break;
}
}
if (MyFlags & (MY_NABP | MY_FNABP))
writtenbytes= 0; /* Everything OK */
else
writtenbytes+= written;
break;
}
DBUG_RETURN(writtenbytes);
} /* my_fwrite */
/* Seek to position in file */
my_off_t my_fseek(FILE *stream, my_off_t pos, int whence,
myf MyFlags __attribute__((unused)))
{
DBUG_ENTER("my_fseek");
DBUG_PRINT("my",("stream: 0x%lx pos: %lu whence: %d MyFlags: %lu",
(long) stream, (long) pos, whence, MyFlags));
DBUG_RETURN(fseek(stream, (off_t) pos, whence) ?
MY_FILEPOS_ERROR : (my_off_t) ftell(stream));
} /* my_seek */
/* Tell current position of file */
my_off_t my_ftell(FILE *stream, myf MyFlags __attribute__((unused)))
{
off_t pos;
DBUG_ENTER("my_ftell");
DBUG_PRINT("my",("stream: 0x%lx MyFlags: %lu", (long) stream, MyFlags));
pos=ftell(stream);
DBUG_PRINT("exit",("ftell: %lu",(ulong) pos));
DBUG_RETURN((my_off_t) pos);
} /* my_ftell */
/* Get a File corresponding to the stream*/
int my_fileno(FILE *f)
{
#ifdef _WIN32
return my_win_fileno(f);
#else
return fileno(f);
#endif
}
|
