Prepare new maemo release
[maemo-rb.git] / apps / language.c
blob715f83f67296875a8c64bafea76d8dc9d8045ea6
1 /***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
10 * Copyright (C) 2002 Daniel Stenberg
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
22 #include <stdio.h>
23 #include "file.h"
25 #include "language.h"
26 #include "lang.h"
27 #include "debug.h"
28 #include "string.h"
29 #ifdef HAVE_LCD_BITMAP
30 #include "viewport.h"
31 #endif
33 /* The following header is generated by the build system and only defines
34 MAX_LANGUAGE_SIZE to be the size of the largest currently available
35 language! */
36 #include "max_language_size.h"
38 /* These defines must match the initial bytes in the binary lang file */
39 /* See tools/genlang (TODO: Use common include for both) */
40 #define LANGUAGE_COOKIE 0x1a
41 #define LANGUAGE_VERSION 0x06
42 #define LANGUAGE_FLAG_RTL 0x01
44 #define HEADER_SIZE 4
45 #define SUBHEADER_SIZE 6
47 static unsigned char language_buffer[MAX_LANGUAGE_SIZE];
48 static unsigned char lang_options = 0;
50 void lang_init(const unsigned char *builtin, unsigned char **dest, int count)
52 while(count--) {
53 *dest++ = (unsigned char *)builtin;
54 /* advance pointer to next string */
55 builtin += strlen((char *)builtin) + 1;
59 int lang_load(const char *filename, const unsigned char *builtin,
60 unsigned char **dest, unsigned char *buffer,
61 unsigned int user_num, int max_lang_size,
62 unsigned int max_id)
64 int lang_size;
65 int fd = open(filename, O_RDONLY);
66 int retcode=0;
67 unsigned char lang_header[HEADER_SIZE];
68 unsigned char sub_header[SUBHEADER_SIZE];
69 unsigned int id, foffset;
71 if(fd < 0)
72 return 1;
73 read(fd, lang_header, HEADER_SIZE);
74 if((lang_header[0] == LANGUAGE_COOKIE) &&
75 (lang_header[1] == LANGUAGE_VERSION) &&
76 (lang_header[2] == TARGET_ID)) {
77 /* jump to the proper entry in the table of subheaders */
78 lseek(fd, user_num * SUBHEADER_SIZE, SEEK_CUR);
79 read(fd, sub_header, SUBHEADER_SIZE);
80 /* read in information about the requested lang */
81 #if 0 /* unused */
82 unsigned int num_strings = (sub_header[0]<<8) | sub_header[1];
83 #endif
84 lang_size = (sub_header[2]<<8) | sub_header[3];
85 foffset = (sub_header[4]<<8) | sub_header[5];
86 if(lang_size <= max_lang_size) {
87 /* initialize with builtin */
88 lang_init(builtin, dest, max_id);
89 lseek(fd, foffset, SEEK_SET);
90 read(fd, buffer, lang_size);
92 while(lang_size>3) {
93 id = ((buffer[0]<<8) | buffer[1]); /* get two-byte id */
94 buffer += 2; /* pass the id */
95 if(id < max_id) {
96 #if 0
97 DEBUGF("%2x New: %30s ", id, buffer);
98 DEBUGF("Replaces: %s\n", dest[id]);
99 #endif
100 dest[id] = buffer; /* point to this string */
102 while(*buffer) { /* pass the string */
103 lang_size--;
104 buffer++;
106 lang_size-=3; /* the id and the terminating zero */
107 buffer++; /* pass the terminating zero-byte */
110 else {
111 DEBUGF("Language %s too large: %d\n", filename, lang_size);
112 retcode = 2;
115 else {
116 DEBUGF("Illegal language file\n");
117 retcode = 3;
119 close(fd);
120 lang_options = retcode ? 0 : lang_header[3];
121 return retcode;
124 int lang_core_load(const char *filename)
126 return lang_load(filename, core_language_builtin, language_strings,
127 language_buffer, 0, MAX_LANGUAGE_SIZE,
128 LANG_LAST_INDEX_IN_ARRAY);
131 int lang_english_to_id(const char *english)
133 int i;
134 unsigned char *ptr = (unsigned char *) core_language_builtin;
136 for (i = 0; i < LANG_LAST_INDEX_IN_ARRAY; i++) {
137 if (!strcmp(ptr, english))
138 return i;
139 ptr += strlen((char *)ptr) + 1; /* advance pointer to next string */
141 return -1;
144 int lang_is_rtl(void)
146 return (lang_options & LANGUAGE_FLAG_RTL) != 0;