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
  29 /* The following header is generated by the build system and only defines
  30    MAX_LANGUAGE_SIZE to be the size of the largest currently available
  31    language! */
  32 #include "max_language_size.h"
  33
  34 /* both these must match the two initial bytes in the binary lang file */
  35 #define LANGUAGE_COOKIE  0x1a
  36 #define LANGUAGE_VERSION 0x04
  37
  38
  39 static unsigned char language_buffer[MAX_LANGUAGE_SIZE];
  40
  41 void lang_init(void)
  42 {
  43     int i;
  44     unsigned char *ptr = (unsigned char *) language_builtin;
  45
  46     for (i = 0; i < LANG_LAST_INDEX_IN_ARRAY; i++) {
  47         language_strings[i] = ptr;
  48         ptr += strlen((char *)ptr) + 1; /* advance pointer to next string */
  49     }
  50 }
  51
  52 int lang_load(const char *filename)
  53 {
  54     int fsize;
  55     int fd = open(filename, O_RDONLY);
  56     int retcode=0;
  57     unsigned char lang_header[3];
  58     if(fd < 0)
  59         return 1;
  60     fsize = filesize(fd) - 2;
  61     if(fsize <= MAX_LANGUAGE_SIZE) {
  62         read(fd, lang_header, 3);
  63         if((lang_header[0] == LANGUAGE_COOKIE) &&
  64            (lang_header[1] == LANGUAGE_VERSION) &&
  65            (lang_header[2] == TARGET_ID)) {
  66             read(fd, language_buffer, MAX_LANGUAGE_SIZE);
  67             unsigned char *ptr = language_buffer;
  68             int id;
  69             lang_init();                    /* initialize with builtin */
  70
  71             while(fsize>3) {
  72                 id = (ptr[0]<<8) | ptr[1];  /* get two-byte id */
  73                 ptr+=2;                     /* pass the id */
  74                 if(id < LANG_LAST_INDEX_IN_ARRAY) {
  75 #if 0
  76                     DEBUGF("%2x New: %30s ", id, ptr);
  77                     DEBUGF("Replaces: %s\n", language_strings[id]);
  78 #endif
  79                     language_strings[id] = ptr; /* point to this string */
  80                 }
  81                 while(*ptr) {               /* pass the string */
  82                     fsize--;
  83                     ptr++;
  84                 }
  85                 fsize-=3; /* the id and the terminating zero */
  86                 ptr++;       /* pass the terminating zero-byte */
  87             }
  88         }
  89         else {
  90             DEBUGF("Illegal language file\n");
  91             retcode = 2;
  92         }
  93     }
  94     else {
  95         DEBUGF("Language %s too large: %d\n", filename, fsize);
  96         retcode = 3;
  97     }
  98     close(fd);
  99     return retcode;
 100 }