b5240743e9
- Major overhaul of the source code to make maintenance and support for new compression formats easier. - Use "liblzma" instead of "xzcat" for dealing with LZMA compressed RPMs.
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matthias Scheler.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define FILEIO_INTERNAL /**/
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#include "fileio.h"
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#include <stdlib.h>
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FileHandle *
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FileHandleCreate(FileHandleCloseFunc close_func, FileHandleReadFunc read_func,
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size_t inst_size)
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{
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FileHandle *fh;
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if ((fh = calloc(1, sizeof(*fh) + inst_size)) == NULL)
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return NULL;
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fh->fh_CloseFunc = close_func;
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fh->fh_ReadFunc = read_func;
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if (inst_size > 0)
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fh->fh_InstData = &fh[1];
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return fh;
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}
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void
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FileHandleClose(FileHandle *fh)
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{
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fh->fh_CloseFunc(fh);
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free(fh);
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}
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bool
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FileHandleRead(FileHandle *fh, void *buffer, size_t bytes)
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{
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char *ptr;
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ptr = buffer;
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while (bytes > 0) {
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ssize_t rbytes;
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rbytes = fh->fh_ReadFunc(fh, ptr, bytes);
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if (rbytes <= 0)
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break;
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ptr += rbytes;
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bytes -= rbytes;
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fh->fh_Pos += rbytes;
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}
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return (bytes == 0);
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}
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off_t
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FileHandleGetPos(const FileHandle *fh)
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{
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return fh->fh_Pos;
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}
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