27
27
#define fseek(A,B,C) fseeko((A),(B),(C))
31
Read a chunk of bytes from a FILE
35
stream File descriptor
36
Buffer Buffer to read to
37
Count Number of bytes to read
38
MyFlags Flags on what to do on error
42
# Number of bytes read
45
size_t my_fread(FILE *stream, uchar *Buffer, size_t Count, myf MyFlags)
48
DBUG_ENTER("my_fread");
49
DBUG_PRINT("my",("stream: 0x%lx Buffer: 0x%lx Count: %u MyFlags: %d",
50
(long) stream, (long) Buffer, (uint) Count, MyFlags));
52
if ((readbytes= fread(Buffer, sizeof(char), Count, stream)) != Count)
54
DBUG_PRINT("error",("Read only %d bytes", (int) readbytes));
55
if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
58
my_error(EE_READ, MYF(ME_BELL+ME_WAITTANG),
59
my_filename(fileno(stream)),errno);
61
if (MyFlags & (MY_NABP | MY_FNABP))
62
my_error(EE_EOFERR, MYF(ME_BELL+ME_WAITTANG),
63
my_filename(fileno(stream)),errno);
65
my_errno=errno ? errno : -1;
66
if (ferror(stream) || MyFlags & (MY_NABP | MY_FNABP))
67
DBUG_RETURN((size_t) -1); /* Return with error */
69
if (MyFlags & (MY_NABP | MY_FNABP))
70
DBUG_RETURN(0); /* Read ok */
71
DBUG_RETURN(readbytes);
32
76
Write a chunk of bytes to a stream
42
86
# Number of bytes written
45
size_t my_fwrite(FILE *stream, const unsigned char *Buffer, size_t Count, myf MyFlags)
89
size_t my_fwrite(FILE *stream, const uchar *Buffer, size_t Count, myf MyFlags)
47
91
size_t writtenbytes =0;
49
93
#if !defined(NO_BACKGROUND) && defined(USE_MY_STREAM)
96
DBUG_ENTER("my_fwrite");
97
DBUG_PRINT("my",("stream: 0x%lx Buffer: 0x%lx Count: %u MyFlags: %d",
98
(long) stream, (long) Buffer, (uint) Count, MyFlags));
53
100
#if !defined(NO_BACKGROUND) && defined(USE_MY_STREAM)
60
107
if ((written = (size_t) fwrite((char*) Buffer,sizeof(char),
61
108
Count, stream)) != Count)
110
DBUG_PRINT("error",("Write only %d bytes", (int) writtenbytes));
64
112
if (written != (size_t) -1)
72
120
if (errno == EINTR)
74
my_fseek(stream,seekptr,MY_SEEK_SET,MYF(0));
122
VOID(my_fseek(stream,seekptr,MY_SEEK_SET,MYF(0)));
84
132
if (!(errors++ % MY_WAIT_GIVE_USER_A_MESSAGE))
85
133
my_error(EE_DISK_FULL,MYF(ME_BELL | ME_NOREFRESH),
86
134
"[stream]",my_errno,MY_WAIT_FOR_USER_TO_FIX_PANIC);
87
sleep(MY_WAIT_FOR_USER_TO_FIX_PANIC);
88
my_fseek(stream,seekptr,MY_SEEK_SET,MYF(0));
135
VOID(sleep(MY_WAIT_FOR_USER_TO_FIX_PANIC));
136
VOID(my_fseek(stream,seekptr,MY_SEEK_SET,MYF(0)));
115
163
my_off_t my_fseek(FILE *stream, my_off_t pos, int whence,
116
164
myf MyFlags __attribute__((unused)))
118
return(fseek(stream, (off_t) pos, whence) ?
166
DBUG_ENTER("my_fseek");
167
DBUG_PRINT("my",("stream: 0x%lx pos: %lu whence: %d MyFlags: %d",
168
(long) stream, (long) pos, whence, MyFlags));
169
DBUG_RETURN(fseek(stream, (off_t) pos, whence) ?
119
170
MY_FILEPOS_ERROR : (my_off_t) ftell(stream));
174
/* Tell current position of file */
176
my_off_t my_ftell(FILE *stream, myf MyFlags __attribute__((unused)))
179
DBUG_ENTER("my_ftell");
180
DBUG_PRINT("my",("stream: 0x%lx MyFlags: %d", (long) stream, MyFlags));
182
DBUG_PRINT("exit",("ftell: %lu",(ulong) pos));
183
DBUG_RETURN((my_off_t) pos);