146 lines
4.8 KiB
C
146 lines
4.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 Daniel Stenberg
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include "file.h"
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#include "language.h"
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#include "lang.h"
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#include "debug.h"
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#include "string.h"
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#include "viewport.h"
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/* The following header is generated by the build system and only defines
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MAX_LANGUAGE_SIZE to be the size of the largest currently available
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language! */
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#include "max_language_size.h"
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/* These defines must match the initial bytes in the binary lang file */
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/* See tools/genlang (TODO: Use common include for both) */
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#define LANGUAGE_COOKIE 0x1a
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#define LANGUAGE_VERSION 0x06
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#define LANGUAGE_FLAG_RTL 0x01
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#define HEADER_SIZE 4
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#define SUBHEADER_SIZE 6
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static unsigned char language_buffer[MAX_LANGUAGE_SIZE];
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static unsigned char lang_options = 0;
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void lang_init(const unsigned char *builtin, unsigned char **dest, int count)
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{
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while(count--) {
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*dest++ = (unsigned char *)builtin;
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/* advance pointer to next string */
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builtin += strlen((char *)builtin) + 1;
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}
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}
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int lang_load(const char *filename, const unsigned char *builtin,
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unsigned char **dest, unsigned char *buffer,
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unsigned int user_num, int max_lang_size,
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unsigned int max_id)
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{
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int lang_size;
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int fd = open(filename, O_RDONLY);
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int retcode=0;
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unsigned char lang_header[HEADER_SIZE];
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unsigned char sub_header[SUBHEADER_SIZE];
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unsigned int id, foffset;
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if(fd < 0)
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return 1;
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read(fd, lang_header, HEADER_SIZE);
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if((lang_header[0] == LANGUAGE_COOKIE) &&
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(lang_header[1] == LANGUAGE_VERSION) &&
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(lang_header[2] == TARGET_ID)) {
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/* jump to the proper entry in the table of subheaders */
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lseek(fd, user_num * SUBHEADER_SIZE, SEEK_CUR);
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read(fd, sub_header, SUBHEADER_SIZE);
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/* read in information about the requested lang */
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#if 0 /* unused */
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unsigned int num_strings = (sub_header[0]<<8) | sub_header[1];
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#endif
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lang_size = (sub_header[2]<<8) | sub_header[3];
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foffset = (sub_header[4]<<8) | sub_header[5];
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if(lang_size <= max_lang_size) {
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/* initialize with builtin */
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lang_init(builtin, dest, max_id);
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lseek(fd, foffset, SEEK_SET);
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read(fd, buffer, lang_size);
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buffer[max_lang_size - 1] = '\0'; /* ensure buffer is null terminated */
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while(lang_size>3) {
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id = ((buffer[0]<<8) | buffer[1]); /* get two-byte id */
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buffer += 2; /* pass the id */
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if(id < max_id) {
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#if 0
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DEBUGF("%2x New: %30s ", id, buffer);
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DEBUGF("Replaces: %s\n", dest[id]);
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#endif
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dest[id] = buffer; /* point to this string */
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}
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while(*buffer) { /* pass the string */
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lang_size--;
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buffer++;
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}
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lang_size-=3; /* the id and the terminating zero */
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buffer++; /* pass the terminating zero-byte */
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}
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}
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else {
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DEBUGF("Language %s too large: %d\n", filename, lang_size);
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retcode = 2;
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}
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}
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else {
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DEBUGF("Illegal language file\n");
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retcode = 3;
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}
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close(fd);
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lang_options = retcode ? 0 : lang_header[3];
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return retcode;
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}
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int lang_core_load(const char *filename)
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{
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return lang_load(filename, core_language_builtin, language_strings,
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language_buffer, 0, MAX_LANGUAGE_SIZE,
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LANG_LAST_INDEX_IN_ARRAY);
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}
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int lang_english_to_id(const char *english)
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{
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int i;
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unsigned char *ptr = (unsigned char *) core_language_builtin;
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for (i = 0; i < LANG_LAST_INDEX_IN_ARRAY; i++) {
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if (!strcmp(ptr, english))
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return i;
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ptr += strlen((char *)ptr) + 1; /* advance pointer to next string */
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}
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return -1;
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}
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int lang_is_rtl(void)
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{
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return (lang_options & LANGUAGE_FLAG_RTL) != 0;
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}
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