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 #if defined(SIMULATOR) && defined(__MINGW32__)
  24 extern int printf(const char *format, ...);
  25 #endif
  26
  27 #include "language.h"
  28 #include "lang.h"
  29 #include "debug.h"
  30 #include "string.h"
  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 /* both these must match the two initial bytes in the binary lang file */
  38 #define LANGUAGE_COOKIE  0x1a
  39 #define LANGUAGE_VERSION 0x04
  40
  41
  42 static unsigned char language_buffer[MAX_LANGUAGE_SIZE];
  43
  44 void lang_init(void)
  45 {
  46     int i;
  47     unsigned char *ptr = (unsigned char *) language_builtin;
  48
  49     for (i = 0; i < LANG_LAST_INDEX_IN_ARRAY; i++) {
  50         language_strings[i] = ptr;
  51         ptr += strlen((char *)ptr) + 1; /* advance pointer to next string */
  52     }
  53 }
  54
  55 int lang_load(const char *filename)
  56 {
  57     int fsize;
  58     int fd = open(filename, O_RDONLY);
  59     int retcode=0;
  60     unsigned char lang_header[3];
  61     if(fd < 0)
  62         return 1;
  63     fsize = filesize(fd) - 2;
  64     if(fsize <= MAX_LANGUAGE_SIZE) {
  65         read(fd, lang_header, 3);
  66         if((lang_header[0] == LANGUAGE_COOKIE) &&
  67            (lang_header[1] == LANGUAGE_VERSION) &&
  68            (lang_header[2] == TARGET_ID)) {
  69             read(fd, language_buffer, MAX_LANGUAGE_SIZE);
  70             unsigned char *ptr = language_buffer;
  71             int id;
  72             lang_init();                    /* initialize with builtin */
  73
  74             while(fsize>3) {
  75                 id = (ptr[0]<<8) | ptr[1];  /* get two-byte id */
  76                 ptr+=2;                     /* pass the id */
  77                 if(id < LANG_LAST_INDEX_IN_ARRAY) {
  78 #if 0
  79                     printf("%2x New: %30s ", id, ptr);
  80                     printf("Replaces: %s\n", language_strings[id]);
  81 #endif
  82                     language_strings[id] = ptr; /* point to this string */
  83                 }
  84                 while(*ptr) {               /* pass the string */
  85                     fsize--;
  86                     ptr++;
  87                 }
  88                 fsize-=3; /* the id and the terminating zero */
  89                 ptr++;       /* pass the terminating zero-byte */
  90             }
  91         }
  92         else {
  93             DEBUGF("Illegal language file\n");
  94             retcode = 2;
  95         }
  96     }
  97     else {
  98         DEBUGF("Language %s too large: %d\n", filename, fsize);
  99         retcode = 3;
 100     }
 101     close(fd);
 102     return retcode;
 103 }