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54 lines
2 KiB
C
54 lines
2 KiB
C
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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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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