apps/language.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 Daniel Stenberg
  11  *
  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.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include <file.h>
  23
  24 #include "language.h"
  25 #include "lang.h"
  26 #include "debug.h"
  27 #include "string.h"
  28 #ifdef HAVE_LCD_BITMAP
  29 #include "viewport.h"
  30 #endif
  31
  32 /* The following header is generated by the build system and only defines
  33    MAX_LANGUAGE_SIZE to be the size of the largest currently available
  34    language! */
  35 #include "max_language_size.h"
  36
  37 /* These defines must match the initial bytes in the binary lang file */
  38 /* See tools/genlang (TODO: Use common include for both) */
  39 #define LANGUAGE_COOKIE   0x1a
  40 #define LANGUAGE_VERSION  0x05
  41 #define LANGUAGE_FLAG_RTL 0x01
  42
  43 #define HEADER_SIZE 4
  44
  45 static unsigned char language_buffer[MAX_LANGUAGE_SIZE];
  46
  47 void lang_init(void)
  48 {
  49     int i;
  50     unsigned char *ptr = (unsigned char *) language_builtin;
  51
  52     for (i = 0; i < LANG_LAST_INDEX_IN_ARRAY; i++) {
  53         language_strings[i] = ptr;
  54         ptr += strlen((char *)ptr) + 1; /* advance pointer to next string */
  55     }
  56 }
  57
  58 static unsigned char lang_options = 0;
  59
  60 int lang_is_rtl(void)
  61 {
  62     return (lang_options & LANGUAGE_FLAG_RTL) != 0;
  63 }
  64
  65 int lang_load(const char *filename)
  66 {
  67     int fsize;
  68     int fd = open(filename, O_RDONLY);
  69     int retcode=0;
  70     unsigned char lang_header[HEADER_SIZE];
  71     if(fd < 0)
  72         return 1;
  73     fsize = filesize(fd) - HEADER_SIZE;
  74     if(fsize <= MAX_LANGUAGE_SIZE) {
  75         read(fd, lang_header, HEADER_SIZE);
  76         if((lang_header[0] == LANGUAGE_COOKIE) &&
  77            (lang_header[1] == LANGUAGE_VERSION) &&
  78            (lang_header[2] == TARGET_ID)) {
  79             read(fd, language_buffer, MAX_LANGUAGE_SIZE);
  80             unsigned char *ptr = language_buffer;
  81             int id;
  82             lang_init();                    /* initialize with builtin */
  83
  84             while(fsize>3) {
  85                 id = (ptr[0]<<8) | ptr[1];  /* get two-byte id */
  86                 ptr+=2;                     /* pass the id */
  87                 if(id < LANG_LAST_INDEX_IN_ARRAY) {
  88 #if 0
  89                     DEBUGF("%2x New: %30s ", id, ptr);
  90                     DEBUGF("Replaces: %s\n", language_strings[id]);
  91 #endif
  92                     language_strings[id] = ptr; /* point to this string */
  93                 }
  94                 while(*ptr) {               /* pass the string */
  95                     fsize--;
  96                     ptr++;
  97                 }
  98                 fsize-=3; /* the id and the terminating zero */
  99                 ptr++;       /* pass the terminating zero-byte */
 100             }
 101         }
 102         else {
 103             DEBUGF("Illegal language file\n");
 104             retcode = 2;
 105         }
 106     }
 107     else {
 108         DEBUGF("Language %s too large: %d\n", filename, fsize);
 109         retcode = 3;
 110     }
 111     close(fd);
 112     if (retcode)
 113     {
 114         lang_options = 0;
 115     }
 116     else
 117     {
 118         lang_options = lang_header[3];
 119 #ifdef HAVE_LCD_BITMAP
 120         viewportmanager_theme_changed(THEME_UI_VIEWPORT);
 121 #endif
 122     }
 123     return retcode;
 124 }
 125
 126 int lang_english_to_id(const char* english)
 127 {
 128     int i;
 129     unsigned char *ptr = (unsigned char *) language_builtin;
 130
 131     for (i = 0; i < LANG_LAST_INDEX_IN_ARRAY; i++) {
 132         if (!strcmp(ptr, english))
 133             return i;
 134         ptr += strlen((char *)ptr) + 1; /* advance pointer to next string */
 135     }
 136     return -1;
 137 }