rbutil/ipodpatcher/ipod2c.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id: ipodio-win32.c 12205 2007-02-05 01:20:20Z dave $
   9  *
  10  * Copyright (C) 2007 Dave Chapman
  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 <stdio.h>
  23 #include <string.h>
  24 #include <sys/types.h>
  25 #include <sys/stat.h>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include <stdlib.h>
  29
  30 #ifndef O_BINARY
  31 #define O_BINARY 0
  32 #endif
  33
  34 static off_t filesize(int fd)
  35 {
  36     struct stat buf;
  37
  38     fstat(fd,&buf);
  39     return buf.st_size;
  40 }
  41
  42 static int write_cfile(unsigned char* buf, off_t len, char* cname)
  43 {
  44     char filename[256];
  45     FILE* fp;
  46     int i;
  47
  48     snprintf(filename,256,"%s.c",cname);
  49
  50     fp = fopen(filename,"w+");
  51     if (fp == NULL) {
  52         fprintf(stderr,"Couldn't open %s\n",filename);
  53         return -1;
  54     }
  55
  56     fprintf(fp,"/* Generated by ipod2c */\n\n");
  57     fprintf(fp,"unsigned char %s[] = {",cname);
  58
  59     for (i=0;i<len;i++) {
  60         if ((i % 16) == 0) {
  61            fprintf(fp,"\n    ");
  62         }
  63         if (i == (len-1)) {
  64             fprintf(fp,"0x%02x",buf[i]);
  65         } else {
  66             fprintf(fp,"0x%02x, ",buf[i]);
  67         }
  68     }
  69     fprintf(fp,"\n};\n");
  70
  71     fclose(fp);
  72     return 0;
  73 }
  74
  75 static int write_hfile(unsigned char* buf, off_t len, char* cname)
  76 {
  77     char filename[256];
  78     FILE* fp;
  79
  80     snprintf(filename,256,"%s.h",cname);
  81     fp = fopen(filename,"w+");
  82     if (fp == NULL) {
  83         fprintf(stderr,"Couldn't open %s\n",filename);
  84         return -1;
  85     }
  86
  87     fprintf(fp,"/* Generated by ipod2c */\n\n");
  88     fprintf(fp,"#define LEN_%s %d\n",cname,(int)len);
  89     fprintf(fp,"extern unsigned char %s[];\n",cname);
  90     fclose(fp);
  91     return 0;
  92 }
  93
  94 int main (int argc, char* argv[])
  95 {
  96     char* infile;
  97     char* cname;
  98     int fd;
  99     unsigned char* buf;
 100     int len;
 101     int n;
 102
 103     if (argc != 3) {
 104         fprintf(stderr,"Usage: ipod2c file.ipod cname\n");
 105         return 0;
 106     }
 107
 108     infile=argv[1];
 109     cname=argv[2];
 110
 111     fd = open(infile,O_RDONLY|O_BINARY);
 112     if (fd < 0) {
 113         fprintf(stderr,"Can not open %s\n",infile);
 114         return 0;
 115     }
 116
 117     len = filesize(fd) - 8;
 118
 119     n = lseek(fd,8,SEEK_SET);
 120     if (n != 8) {
 121         fprintf(stderr,"Seek failed\n");
 122         return 0;
 123     }
 124
 125     buf = malloc(len);
 126     n = read(fd,buf,len);
 127     if (n < len) {
 128         fprintf(stderr,"Short read, aborting\n");
 129         return 0;
 130     }
 131     close(fd);
 132
 133     if (write_cfile(buf,len,cname) < 0) {
 134         return -1;
 135     }
 136     if (write_hfile(buf,len,cname) < 0) {
 137         return -1;
 138     }
 139
 140     return 0;
 141 }