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