144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/* *****************************************************************************
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* libg1m/format/lang.h -- the G1M language file format description.
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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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#ifndef LIBG1M_FORMAT_LANG_H
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# define LIBG1M_FORMAT_LANG_H
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# include <libg1m.h>
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# pragma pack(1)
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/* ************************************************************************** */
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/* G1L - Language files for fx calculators */
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/* ************************************************************************** */
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/* It all starts with a header: */
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struct g1l_subheader {
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/* identifier: is "PowerUSB" on original things */
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uint8_t identifier[8];
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/* OS information (raw binary format), e.g. 0x02,0x09 for 2.09. */
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uint8_t os_major;
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uint8_t os_minor;
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/* unknown bytes */
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uint8_t _unknown[2];
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/* message count */
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uint16_t message_count;
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};
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/* Then comes a list of offsets, and the messages.
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*
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* Each element of the offsets list is 16-bytes long.
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* It is relative to the first element (which starts right after the
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* offsets list - no alignment).
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*
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* The messages are null-terminated - once you get the offsets, you get
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* them completely. */
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/* ************************************************************************** */
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/* G3L - Language files for Prizm */
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/* ************************************************************************** */
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/* Thanks to amazonka for his (minimalist) description of the G3L format
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* at Cemetech. So the G3L format starts off with a header: */
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struct g3l_subheader {
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/* a checksum */
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uint32_t checksum;
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/* magic:
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* - 0x04, 0x01, 0x00, 0x00 for language files;
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* - 0x02, 0x01, 0x00, 0x00 for function key files. */
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uint8_t magic[4];
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/* lol */
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uint8_t undocumented[14];
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/* size of the message zone size - unreliable (valid could have zero) */
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uint32_t message_zone_size;
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/* undocumented, again */
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uint8_t undocumented5[6];
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/* name of the language */
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uint8_t language_name2[28];
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/* size of the entire file */
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uint32_t filesize;
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/* size of the entire file - starts with an '@' */
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uint8_t internal_name[8];
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/* undocumented */
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uint8_t undocumented2[200];
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/* version number string: "XX.XX.XXXX" */
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uint8_t version[10];
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/* unused */
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uint8_t unused2[2];
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/* creation time: "YYYY.MMDD.HHMM" */
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uint8_t datetime[14];
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/* big undocumented thing */
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uint8_t undocumented3[3410];
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/* language name (zero terminated) */
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uint8_t language_name[16];
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/* language salutation (zero terminated) */
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uint8_t language_salutation[16];
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/* filename (extension included) */
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uint8_t g3l_filename[16];
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/* undocumented */
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uint8_t undocumented4[308];
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};
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/* Then there is something amazonka names the "executable code section".
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* This is in fact the message zone. */
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struct g3l_lang_header {
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/* sequence: '4C 59 37 35 35 00 00 00 02' (LY755 ) */
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uint8_t sequence[9];
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/* unused byte. */
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uint8_t unused;
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/* number of messages ("possibly 0 base indexed") */
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uint32_t num;
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/* unused bytes */
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uint8_t unused2[2];
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};
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/* Then we have offsets of all messages (4 bytes each),
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* then messages themselves, zero-terminated.
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*
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* The four last bytes of the files are a little footer, which is: */
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struct g3l_footer {
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/* copy of the first checksum in the subheader */
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uint32_t checksum;
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};
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/* This footer is not counted as part of the file. */
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# pragma pack()
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#endif /* LIBG1M_FORMAT_LANG_H */
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