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/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matthias Scheler.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#define FILEIO_INTERNAL /**/
#include "fileio.h"
#include <stdlib.h>
FileHandle *
FileHandleCreate(FileHandleCloseFunc close_func, FileHandleReadFunc read_func,
size_t inst_size)
{
FileHandle *fh;
if ((fh = calloc(1, sizeof(*fh) + inst_size)) == NULL)
return NULL;
fh->fh_CloseFunc = close_func;
fh->fh_ReadFunc = read_func;
if (inst_size > 0)
fh->fh_InstData = &fh[1];
return fh;
}
void
FileHandleClose(FileHandle *fh)
{
fh->fh_CloseFunc(fh);
free(fh);
}
bool
FileHandleRead(FileHandle *fh, void *buffer, size_t bytes)
{
char *ptr;
ptr = buffer;
while (bytes > 0) {
ssize_t rbytes;
rbytes = fh->fh_ReadFunc(fh, ptr, bytes);
if (rbytes <= 0)
break;
ptr += rbytes;
bytes -= rbytes;
fh->fh_Pos += rbytes;
}
return (bytes == 0);
}
off_t
FileHandleGetPos(const FileHandle *fh)
{
return fh->fh_Pos;
}
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