60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* *****************************************************************************
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* decode/mcs/alphamem.c -- decode an MCS alpha memory file.
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* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
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*
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* This file is part of libg1m.
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* libg1m is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3.0 of the License,
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* or (at your option) any later version.
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*
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* libg1m 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.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libg1m; if not, see <http://www.gnu.org/licenses/>.
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* ************************************************************************** */
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#include <libg1m/internals.h>
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/**
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* g1m_decode_mcs_alphamem:
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* Decode alpha memory (variables).
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*
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* @arg handle the handle.
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* @arg buffer the buffer to read from.
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* @arg length the data length.
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* @return the error code (0 if ok).
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*/
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int g1m_decode_mcs_alphamem(g1m_mcsfile_t *handle, g1m_buffer_t *buffer,
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uint_fast32_t length)
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{
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/* read the data */
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uint8_t buf[length];
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READ(buf, length)
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/* count number of vars */
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handle->count = length / (2 * sizeof(mcs_bcd_t));
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/* allocate the vars table */
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handle->vars = malloc(handle->count * sizeof(g1m_mcs_cell_t));
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if (!handle->vars) return (g1m_error_alloc);
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/* copy */
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const mcs_bcd_t *b = (void*)buf;
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for (int i = 0; i < handle->count; i++) {
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g1m_bcd_frommcs(b++, &handle->vars[i].real);
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g1m_bcd_frommcs(b++, &handle->vars[i].imgn);
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handle->vars[i].used = 1;
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}
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/* copy */
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size_t tocopy = length - length % sizeof(g1m_mcs_cell_t);
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memcpy(handle->vars, buf, tocopy);
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/* no problem, woop woop */
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return (0);
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}
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