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/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* USE_MY_STREAM isn't set because we can't thrust my_fclose! */
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#include "mysys_priv.h"
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#include "mysys_err.h"
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#define ftell(A) ftello(A)
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#define fseek(A,B,C) fseeko((A),(B),(C))
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Read a chunk of bytes from a FILE
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stream File descriptor
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Buffer Buffer to read to
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Count Number of bytes to read
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MyFlags Flags on what to do on error
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# Number of bytes read
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size_t my_fread(FILE *stream, uchar *Buffer, size_t Count, myf MyFlags)
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DBUG_ENTER("my_fread");
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DBUG_PRINT("my",("stream: 0x%lx Buffer: 0x%lx Count: %u MyFlags: %d",
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(long) stream, (long) Buffer, (uint) Count, MyFlags));
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if ((readbytes= fread(Buffer, sizeof(char), Count, stream)) != Count)
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DBUG_PRINT("error",("Read only %d bytes", (int) readbytes));
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if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
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my_error(EE_READ, MYF(ME_BELL+ME_WAITTANG),
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my_filename(fileno(stream)),errno);
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if (MyFlags & (MY_NABP | MY_FNABP))
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my_error(EE_EOFERR, MYF(ME_BELL+ME_WAITTANG),
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my_filename(fileno(stream)),errno);
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my_errno=errno ? errno : -1;
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if (ferror(stream) || MyFlags & (MY_NABP | MY_FNABP))
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DBUG_RETURN((size_t) -1); /* Return with error */
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if (MyFlags & (MY_NABP | MY_FNABP))
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DBUG_RETURN(0); /* Read ok */
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DBUG_RETURN(readbytes);
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Write a chunk of bytes to a stream
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stream File descriptor
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Buffer Buffer to write from
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Count Number of bytes to write
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MyFlags Flags on what to do on error
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# Number of bytes written
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size_t my_fwrite(FILE *stream, const uchar *Buffer, size_t Count, myf MyFlags)
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size_t writtenbytes =0;
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#if !defined(NO_BACKGROUND) && defined(USE_MY_STREAM)
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DBUG_ENTER("my_fwrite");
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DBUG_PRINT("my",("stream: 0x%lx Buffer: 0x%lx Count: %u MyFlags: %d",
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(long) stream, (long) Buffer, (uint) Count, MyFlags));
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#if !defined(NO_BACKGROUND) && defined(USE_MY_STREAM)
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seekptr= ftell(stream);
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if ((written = (size_t) fwrite((char*) Buffer,sizeof(char),
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Count, stream)) != Count)
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DBUG_PRINT("error",("Write only %d bytes", (int) writtenbytes));
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if (written != (size_t) -1)
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writtenbytes+=written;
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VOID(my_fseek(stream,seekptr,MY_SEEK_SET,MYF(0)));
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#if !defined(NO_BACKGROUND) && defined(USE_MY_STREAM)
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if (my_thread_var->abort)
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MyFlags&= ~ MY_WAIT_IF_FULL; /* End if aborted by user */
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if ((errno == ENOSPC || errno == EDQUOT) &&
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(MyFlags & MY_WAIT_IF_FULL))
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if (!(errors++ % MY_WAIT_GIVE_USER_A_MESSAGE))
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my_error(EE_DISK_FULL,MYF(ME_BELL | ME_NOREFRESH),
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"[stream]",my_errno,MY_WAIT_FOR_USER_TO_FIX_PANIC);
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VOID(sleep(MY_WAIT_FOR_USER_TO_FIX_PANIC));
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VOID(my_fseek(stream,seekptr,MY_SEEK_SET,MYF(0)));
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if (ferror(stream) || (MyFlags & (MY_NABP | MY_FNABP)))
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if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
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my_error(EE_WRITE, MYF(ME_BELL+ME_WAITTANG),
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my_filename(fileno(stream)),errno);
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writtenbytes= (size_t) -1; /* Return that we got error */
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if (MyFlags & (MY_NABP | MY_FNABP))
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writtenbytes= 0; /* Everything OK */
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writtenbytes+= written;
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DBUG_RETURN(writtenbytes);
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/* Seek to position in file */
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my_off_t my_fseek(FILE *stream, my_off_t pos, int whence,
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myf MyFlags __attribute__((unused)))
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DBUG_ENTER("my_fseek");
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DBUG_PRINT("my",("stream: 0x%lx pos: %lu whence: %d MyFlags: %d",
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(long) stream, (long) pos, whence, MyFlags));
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DBUG_RETURN(fseek(stream, (off_t) pos, whence) ?
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MY_FILEPOS_ERROR : (my_off_t) ftell(stream));
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/* Tell current position of file */
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my_off_t my_ftell(FILE *stream, myf MyFlags __attribute__((unused)))
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DBUG_ENTER("my_ftell");
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DBUG_PRINT("my",("stream: 0x%lx MyFlags: %d", (long) stream, MyFlags));
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DBUG_PRINT("exit",("ftell: %lu",(ulong) pos));
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DBUG_RETURN((my_off_t) pos);