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  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <stdlib.h>
  27
  28 #ifndef O_BINARY
  29 #define O_BINARY 0
  30 #endif
  31
  32 static off_t filesize(int fd)
  33 {
  34     struct stat buf;
  35
  36     fstat(fd,&buf);
  37     return buf.st_size;
  38 }
  39
  40 static int write_cfile(unsigned char* buf, off_t len, char* cname)
  41 {
  42     char filename[256];
  43     FILE* fp;
  44     int i;
  45
  46     snprintf(filename,256,"%s.c",cname);
  47
  48     fp = fopen(filename,"w+");
  49     if (fp == NULL) {
  50         fprintf(stderr,"Couldn't open %s\n",filename);
  51         return -1;
  52     }
  53
  54     fprintf(fp,"/* Generated by ipod2c */\n\n");
  55     fprintf(fp,"unsigned char %s[] = {",cname);
  56
  57     for (i=0;i<len;i++) {
  58         if ((i % 16) == 0) {
  59            fprintf(fp,"\n    ");
  60         }
  61         if (i == (len-1)) {
  62             fprintf(fp,"0x%02x",buf[i]);
  63         } else {
  64             fprintf(fp,"0x%02x, ",buf[i]);
  65         }
  66     }
  67     fprintf(fp,"\n};\n");
  68
  69     fclose(fp);
  70     return 0;
  71 }
  72
  73 static int write_hfile(unsigned char* buf, off_t len, char* cname)
  74 {
  75     char filename[256];
  76     FILE* fp;
  77
  78     snprintf(filename,256,"%s.h",cname);
  79     fp = fopen(filename,"w+");
  80     if (fp == NULL) {
  81         fprintf(stderr,"Couldn't open %s\n",filename);
  82         return -1;
  83     }
  84
  85     fprintf(fp,"/* Generated by ipod2c */\n\n");
  86     fprintf(fp,"#define LEN_%s %d\n",cname,(int)len);
  87     fprintf(fp,"extern unsigned char %s[];\n",cname);
  88     fclose(fp);
  89     return 0;
  90 }
  91
  92 int main (int argc, char* argv[])
  93 {
  94     char* infile;
  95     char* cname;
  96     int fd;
  97     unsigned char* buf;
  98     int len;
  99     int n;
 100
 101     if (argc != 3) {
 102         fprintf(stderr,"Usage: ipod2c file.ipod cname\n");
 103         return 0;
 104     }
 105
 106     infile=argv[1];
 107     cname=argv[2];
 108
 109     fd = open(infile,O_RDONLY|O_BINARY);
 110     if (fd < 0) {
 111         fprintf(stderr,"Can not open %s\n",infile);
 112         return 0;
 113     }
 114
 115     len = filesize(fd) - 8;
 116
 117     n = lseek(fd,8,SEEK_SET);
 118     if (n != 8) {
 119         fprintf(stderr,"Seek failed\n");
 120         return 0;
 121     }
 122
 123     buf = malloc(len);
 124     n = read(fd,buf,len);
 125     if (n < len) {
 126         fprintf(stderr,"Short read, aborting\n");
 127         return 0;
 128     }
 129     close(fd);
 130
 131     if (write_cfile(buf,len,cname) < 0) {
 132         return -1;
 133     }
 134     if (write_hfile(buf,len,cname) < 0) {
 135         return -1;
 136     }
 137
 138     return 0;
 139 }