forked from len0rd/rockbox
c1709e3194
This is a major overhaul of the library with some API changes and ease of use improvements, particularly for creating new archives. The updated functionality is intended to support a new X1000 installer framework. Change-Id: Icf192bb546831231d49303fbf529ef1c1ce8905c
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2021 Aidan MacDonald
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "file.h"
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#include "microtar-rockbox.h"
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#include <stdint.h>
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static int fd_read(void* stream, void* data, unsigned size)
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{
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ssize_t res = read((intptr_t)stream, data, size);
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if(res < 0)
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return MTAR_EREADFAIL;
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return res;
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}
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static int fd_write(void* stream, const void* data, unsigned size)
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{
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ssize_t res = write((intptr_t)stream, data, size);
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if(res < 0)
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return MTAR_EWRITEFAIL;
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return res;
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}
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static int fd_seek(void* stream, unsigned offset)
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{
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off_t res = lseek((intptr_t)stream, offset, SEEK_SET);
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if(res < 0 || ((unsigned)res != offset))
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return MTAR_ESEEKFAIL;
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else
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return MTAR_ESUCCESS;
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}
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static int fd_close(void* stream)
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{
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close((intptr_t)stream);
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return MTAR_ESUCCESS;
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}
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static const mtar_ops_t fd_ops = {
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.read = fd_read,
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.write = fd_write,
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.seek = fd_seek,
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.close = fd_close,
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};
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int mtar_open(mtar_t* tar, const char* filename, int flags)
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{
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/* Determine access mode */
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int access;
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switch(flags & O_ACCMODE) {
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case O_RDONLY:
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access = MTAR_READ;
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break;
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case O_WRONLY:
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access = MTAR_WRITE;
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break;
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default:
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/* Note - O_RDWR isn't very useful so we don't allow it */
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return MTAR_EAPI;
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}
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int fd = open(filename, flags);
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if(fd < 0)
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return MTAR_EOPENFAIL;
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/* Init tar struct and functions */
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mtar_init(tar, access, &fd_ops, (void*)(intptr_t)fd);
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return MTAR_ESUCCESS;
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}
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