157 lines
4.6 KiB
C
157 lines
4.6 KiB
C
/* *****************************************************************************
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* decode/std/lang.c -- decode a language 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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/* fx language files parsing */
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/* ************************************************************************** */
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/**
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* g1m_decode_std_lang:
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* Decode fx language files.
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*
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* @arg h the libg1m handle to create.
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* @arg buffer the buffer to read from.
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* @return the error code (0 if ok).
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*/
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int g1m_decode_std_lang(g1m_t **h, g1m_buffer_t *buffer,
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struct standard_header *std)
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{
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(void)std; int err;
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/* read the subheader */
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DREAD(hd, g1l_subheader)
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uint_fast16_t num = be16toh(hd.message_count) + 1;
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/* log */
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log_info("%" PRIuFAST16 " messages to read", num);
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/* beat the best, read the rest! */
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size_t data_size = std->filesize - sizeof(struct standard_header)
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- sizeof(struct g1l_subheader);
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uint8_t data[data_size];
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READ(data, data_size)
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/* make the handle */
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err = g1m_make_lang(h, g1m_platform_fx, num);
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if (err) return (err);
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g1m_t *handle = *h;
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/* get the offset table */
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uint16_t *offsets = (uint16_t*)data;
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char *messages = (char*)(offsets + num);
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/* read messages */
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for (handle->count = 0; handle->count < (int)num; handle->count++) {
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int i = handle->count;
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if (offsets[i] == (uint16_t)-1) {
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log_info("[#%d] -", i);
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continue;
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}
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/* correct offset and log */
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offsets[i] = be16toh(offsets[i]);
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log_info("[#%d] '%s' (0x%" PRIu16 ")", i,
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&messages[offsets[i]], offsets[i]);
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/* store */
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handle->messages[i] = strdup(&messages[offsets[i]]);
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if (!handle->messages[i]) goto fail;
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handle->count++;
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}
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/* no error */
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return (0);
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/* omg fail! */
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fail:
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g1m_free(*h); *h = NULL;
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return (err);
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}
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/* ************************************************************************** */
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/* Decoding language files for fx-CG/Prizm (G3L) */
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/* ************************************************************************** */
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/**
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* g1m_decode_std_cg_lang:
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* Decode fx-CG language file.
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*
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* @arg h the handle to make.
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* @arg buffer the buffer to read from.
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* @arg std the standard header.
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* @arg sub the standard subheader.
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* @arg prizm the prizm-specific subheader.
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* @arg check the checksum to feed.
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* @return the error code (0 if ok).
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*/
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int g1m_decode_std_cg_lang(g1m_t **h, g1m_buffer_t *buffer,
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struct standard_header *std, struct standard_subheader *sub,
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struct _prizm_subheader *prizm, uint32_t *check)
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{
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int err;
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/* read the subheader */
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DREAD(lhd, g3l_lang_header)
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*check = g1m_checksum32(&lhd, sizeof(struct g3l_lang_header), *check);
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/* read the data */
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size_t data_size = sub->filesize - sizeof(struct standard_header)
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- sizeof(struct standard_subheader) - sizeof(struct _prizm_subheader)
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- sizeof(struct g3l_lang_header) - 4;
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uint8_t data[data_size];
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READ(data, data_size)
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*check = g1m_checksum32(data, data_size, *check);
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/* make the handle */
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int num = be32toh(lhd.num);
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err = g1m_make_lang(h, g1m_platform_cg, num);
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if (err) return (err);
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g1m_t *handle = *h;
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/* setup the pointers */
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uint32_t *offsets = (void*)data;
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uint8_t *messages = (uint8_t*)&offsets[num + 1];
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/* read messages */
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for (handle->count = 0; handle->count < (int)num; handle->count++) {
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int i = handle->count;
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if (offsets[i] == (uint32_t)-1) {
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log_info("[#%d] -", i);
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continue;
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}
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/* correct offset and log */
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offsets[i] = be32toh(offsets[i]);
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log_info("[#%d] '%s' (0x%" PRIu32 ")", i,
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&messages[offsets[i]], offsets[i]);
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/* store */
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handle->messages[i] = strdup((char*)&messages[offsets[i]]);
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if (!handle->messages[i]) goto fail;
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}
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/* done */
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return (0);
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fail:
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g1m_free(*h); *h = NULL;
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return (err);
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}
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