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
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
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* Copyright (c) 2017 rxi
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* Copyright (c) 2021 Aidan MacDonald
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "microtar-stdio.h"
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#include <stdio.h>
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#include <string.h>
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static int file_read(void* stream, void* data, unsigned size)
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{
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unsigned res = fread(data, 1, size, (FILE*)stream);
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if(res != size && ferror((FILE*)stream))
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return MTAR_EREADFAIL;
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return res;
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}
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static int file_write(void* stream, const void* data, unsigned size)
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{
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unsigned res = fwrite(data, 1, size, (FILE*)stream);
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if(res != size && ferror((FILE*)stream))
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return MTAR_EWRITEFAIL;
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return res;
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}
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static int file_seek(void* stream, unsigned offset)
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{
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int res = fseek((FILE*)stream, offset, SEEK_SET);
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return (res == 0) ? MTAR_ESUCCESS : MTAR_ESEEKFAIL;
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}
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static int file_close(void* stream)
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{
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int err = fclose((FILE*)stream);
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return (err == 0 ? MTAR_ESUCCESS : MTAR_EFAILURE);
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}
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static const mtar_ops_t file_ops = {
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.read = file_read,
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.write = file_write,
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.seek = file_seek,
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.close = file_close,
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};
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int mtar_open(mtar_t* tar, const char* filename, const char* mode)
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{
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/* Determine access mode */
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int access;
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char* read = strchr(mode, 'r');
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char* write = strchr(mode, 'w');
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if(read) {
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if(write)
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return MTAR_EAPI;
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access = MTAR_READ;
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} else if(write) {
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access = MTAR_WRITE;
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} else {
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return MTAR_EAPI;
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}
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/* Open file */
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FILE* file = fopen(filename, mode);
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if(!file)
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return MTAR_EOPENFAIL;
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mtar_init(tar, access, &file_ops, file);
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return MTAR_ESUCCESS;
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}
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