Sketched split file scheme with partno,totalparts,offset,count,totalsize

libisoburn/trunk/xorriso/xorriso.c

@@ -4240,6 +4240,7 @@ much_too_long:;
               bit14= early eof of iso file
               bit15= content bytes differ
               bit16= symbolic link on disk pointing to dir, dir in iso
+        >>>   bit17= file chunks detected and compared
    @param flag bit0= compare atime
                bit1= compare ctime
                bit2= check only existence of both file objects
@@ -4255,7 +4256,7 @@ int Xorriso_compare_2_files(struct XorrisO *xorriso, char *disk_adr,
                             int *result, int flag)
 {
  struct stat s1, s2, stbuf;
- int ret, r1, r2, fd1= -1, i, done, wanted, missing= 0;
+ int ret, r1, r2, fd1= -1, i, done, wanted, missing= 0, is_split= 0;
  void *stream2= NULL;
  char *respt;
  char buf1[32*1024], buf2[32*1024], a[5*SfileadrL], sfe[5*SfileadrL];
@@ -4301,6 +4302,17 @@ int Xorriso_compare_2_files(struct XorrisO *xorriso, char *disk_adr,
 
  /* Attributes */
  if(s1.st_mode != s2.st_mode) {
+
+   if((S_ISREG(s1.st_mode) || S_ISBLK(s1.st_mode)) && S_ISDIR(s2.st_mode)) {
+
+     /* >>> SPLIT */
+     /* >>> check whether there are only part_files in the directory */;
+       /* >>> is_split= 1; */;
+       /* >>> count this as content chunk container */;
+       /* >>> compare access permissions of first chunk */;
+
+   }
+
    if((s1.st_mode&~S_IFMT)!=(s2.st_mode&~S_IFMT)) {
      sprintf(respt, "%s st_mode  :  %7.7o  <>  %7.7o\n",
              a, s1.st_mode, s2.st_mode);
@@ -4405,8 +4417,15 @@ int Xorriso_compare_2_files(struct XorrisO *xorriso, char *disk_adr,
      (*result)|= 4096;
      return(0);
    }
- 
+
+   if(is_split) { 
+     /* >>> SPLIT */
+     /* >>> for each chunk file : do content comparison */;
+   }
+
    /* Content */
+   /* >>> SPLIT */
+   /* <<< outsource this as separate content comparison function */
    done= 0;
    while(!done) {
      /* fd1 is a regular file and should deliver full buffers */
@@ -4508,6 +4527,7 @@ I thought to have seen a libisofs bug here but it seems that it was an illusion
    @param flag bit0= update rather than compare
                bit1= find[ix] is in recursion
    @return <=0 error, 1= ok , 2= iso_path was deleted
+             3=ok, do not dive into directory (e.g. because it is a split file)
 */
 int Xorriso_find_compare(struct XorrisO *xorriso, void *boss_iter,
                          char *iso_path, char *iso_prefix, char *disk_prefix,
@@ -4549,6 +4569,8 @@ int Xorriso_find_compare(struct XorrisO *xorriso, void *boss_iter,
    return(ret);
  if(deleted)
    return(2);
+ if(result&(1<<17))
+   return(3);
  return(ret);
 }
 
@@ -7155,6 +7177,9 @@ int Xorriso_update_interpreter(struct XorrisO *xorriso, void *boss_iter,
 
  if(compare_result&(8|64)) {
    /* file type, minor+major with device file */
+
+   /* <<< SPLIT : cannot happen here */
+
    ret= Xorriso_rmi(xorriso, boss_iter, (off_t) 0, iso_rr_path, 1); /* rm_r */
    if(ret>0) {
      deleted= 1; 
@@ -7165,6 +7190,10 @@ int Xorriso_update_interpreter(struct XorrisO *xorriso, void *boss_iter,
 
  } else if(compare_result&(1)) {
    /* disk_adr not existing */
+
+   /* ??? SPLIT : Shall i recognize a splitfile without disk file ?
+   */
+
    ret= Xorriso_rmi(xorriso, boss_iter, (off_t) 0, iso_rr_path, 1);
    deleted= 1;
    sprintf(xorriso->info_text, "Deleted ");
@@ -7172,12 +7201,20 @@ int Xorriso_update_interpreter(struct XorrisO *xorriso, void *boss_iter,
  } else if(compare_result&(2|128|(1<<12)|(1<<14)|(1<<15))) {
    /* iso_adr not existing, size, cannot open iso file, early eof of iso file
       content bytes differ */
+
+   /* >>> SPLIT : differing content or size */
+     /* >>> overwrite all parts in the directory */
+
    ret= Xorriso_graft_in(xorriso, boss_iter, disk_path, iso_rr_path,
                          (off_t) 0, (off_t) 0, 2|(flag&4));
    sprintf(xorriso->info_text, "Added/overwrote ");
 
  } else if(compare_result&(4|16|32|256|512|1024)) {
    /* access permissions, user id, group id, mtime, atime, ctime */
+
+   /* >>> SPLIT : differing content or size */
+     /* >>> renew attributes of all parts in the directory */
+
    ret= Xorriso_copy_properties(xorriso, disk_path, iso_rr_path, 0); 
    sprintf(xorriso->info_text, "Adjusted attributes of ");
 
@@ -8078,6 +8115,11 @@ ex:;
 }
 
 
+/* >>> SPLIT : proposed target format
+
+   part_{partno}_of_{total_parts}_at_{offset}_with_{bytes}_of_{total_bytes}
+*/
+
 /* Option -cut_out */
 int Xorriso_option_cut_out(struct XorrisO *xorriso, char *disk_path,
                char *start, char *count, char *iso_rr_path, int flag)