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54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/* 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; either version 2 of the License, or
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(at your option) any later version.
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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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#include "mysys_priv.h"
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#include "mysys_err.h"
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/* Read a chunk of bytes from a file */
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uint32 my_lread(int Filedes, byte *Buffer, uint32 Count, myf MyFlags)
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/* File descriptor */
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/* Buffer must be at least count bytes */
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/* Max number of bytes returnd */
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/* Flags on what to do on error */
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{
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uint32 readbytes;
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DBUG_ENTER("my_lread");
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DBUG_PRINT("my",("Fd: %d Buffer: %ld Count: %ld MyFlags: %d",
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Filedes, Buffer, Count, MyFlags));
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/* Temp hack to get count to int32 while read wants int */
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if ((readbytes = (uint32) read(Filedes, Buffer, (uint) Count)) != Count)
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{
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my_errno=errno;
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if (MyFlags & (MY_WME | MY_FAE | MY_FNABP))
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{
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if (readbytes == MY_FILE_ERROR)
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my_error(EE_READ, MYF(ME_BELL+ME_WAITTANG),
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my_filename(Filedes),errno);
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else
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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(Filedes),errno);
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}
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if (readbytes == MY_FILE_ERROR || MyFlags & (MY_NABP | MY_FNABP))
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DBUG_RETURN((uint32) -1); /* Return med felkod */
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}
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if (MyFlags & (MY_NABP | MY_FNABP))
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DBUG_RETURN(0); /* Ok vid l{sning */
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DBUG_RETURN(readbytes);
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} /* my_lread */
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