158 lines
4.2 KiB
C
158 lines
4.2 KiB
C
/* ****************************************************************************
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* file/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 libcasio.
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* libcasio 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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* libcasio 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 libcasio; if not, see <http://www.gnu.org/licenses/>.
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* ************************************************************************* */
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#include "../decode.h"
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#include "dict.h"
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/**
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* decode_lang_entry:
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* Decode a language file entry.
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*
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* @arg file the file.
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* @arg id the entry ID.
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* @arg mem the memory.
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* @arg size the memory size.
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* @return the error code (0 if ok).
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*/
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CASIO_LOCAL int decode_lang_entry(casio_file_t *handle,
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unsigned int id, void *mem, size_t size)
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{
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size_t len; void *chr;
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char *str;
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/* Find the length. */
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chr = memchr(mem, '\0', size);
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len = chr ? (size_t)((char*)chr - (char*)mem) : size;
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/* Allocate. */
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handle->casio_file_messages[id] = casio_alloc(len + 1, 1);
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str = handle->casio_file_messages[id];
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if (!str) return (casio_error_alloc);
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/* Copy the data. */
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memcpy(str, mem, len);
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str[len] = 0;
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/* Log it and return. */
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msg((ll_info, "[#%d] '%s'", id, str));
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return (0);
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}
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/* ---
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* fx language files parsing.
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* --- */
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/**
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* casio_decode_std_lang:
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* Decode fx language files.
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*
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* @arg h the file 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 CASIO_EXPORT casio_decode_std_lang(casio_file_t **h,
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casio_stream_t *buffer, casio_standard_header_t *std)
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{
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int err; casio_file_t *handle;
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casio_lang_subheader_t hd;
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unsigned int num;
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unsigned long dict_size;
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(void)std; *h = NULL;
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/* read the subheader */
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GDREAD(hd)
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num = be16toh(hd.casio_lang_subheader_count) + 1;
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/* beat the best, read the rest! */
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dict_size = std->casio_standard_header_filesize
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- sizeof(casio_standard_header_t)
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- sizeof(casio_lang_subheader_t);
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/* make the handle */
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err = casio_make_lang(h, casio_filefor_fx, num);
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if (err) return (err);
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handle = *h;
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/* read using the dictionary decoding function. */
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err = casio_decode_std_dict(buffer,
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(casio_decode_dict_entry_t*)&decode_lang_entry, handle,
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num, dict_size, 0);
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if (err) goto fail;
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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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casio_free_file(*h); *h = NULL;
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return (err);
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}
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/**
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* casio_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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* @return the error code (0 if ok).
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*/
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int CASIO_EXPORT casio_decode_std_cg_lang(casio_file_t **h,
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casio_stream_t *buffer, casio_standard_header_t *std,
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casio_standard_subheader_t *sub, casio_standard_prizm_subheader_t *prizm)
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{
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int err; casio_file_t *handle;
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casio_prizm_lang_subheader_t lhd;
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unsigned int num;
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unsigned long dict_size;
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(void)std; (void)prizm;
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/* read the subheader */
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DREAD(lhd)
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num = be32toh(lhd.casio_prizm_lang_subheader_count);
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dict_size = be32toh(sub->casio_standard_subheader_filesize)
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- sizeof(casio_standard_header_t)
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- sizeof(casio_standard_subheader_t)
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- sizeof(casio_standard_prizm_subheader_t)
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- sizeof(casio_lang_subheader_t)
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- sizeof(casio_uint32_t);
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/* make the handle */
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err = casio_make_lang(h, casio_filefor_cg, num);
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if (err) return (err);
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handle = *h;
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/* read using the dictionary decoding function. */
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err = casio_decode_std_dict(buffer,
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(casio_decode_dict_entry_t*)&decode_lang_entry, handle,
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num, dict_size, 1);
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if (err) goto fail;
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/* done */
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return (0);
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fail:
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casio_free_file(*h); *h = NULL;
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return (err);
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}
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