Changes in tools/mkfat.py [a9a6d8d:cc1a727] in mainline

File:

• tools/mkfat.py (modified) (3 diffs)

tools/mkfat.py

@@ -168 +168 @@
 """
 
-LFN_ENTRY = """little:
-        uint8_t pos
-        uint16_t name1[5]
-        uint8_t attr
-        uint8_t type
-        uint8_t csum
-        uint16_t name2[6]
-        uint16_t fc
-        uint16_t name3[2]
-"""
-
-# Global variable to hold the file names in 8.3 format. Needed to 
-# keep track of "number" when creating a short fname from a LFN.
-name83_list = []
-
-def name83(fname):
-        "Create a 8.3 name for the given fname"
-
+def mangle_fname(name):
         # FIXME: filter illegal characters
-        parts = fname.split('.')
-        
-        name = ''
-        ext = ''
-        lfn = False
-
-        if len(fname) > 11 :
-                lfn = True
-
+        parts = name.split('.')
+        
         if len(parts) > 0:
-                name = parts[0]
-                if len(name) > 8 :
-                        lfn = True
-
-        if len(parts) > 1 :
-                ext = parts[-1]
-                if len(ext) > 3 :
-                        lfn = True
-
-        if len(parts) > 2 :
-                lfn = True
-
-        if (lfn == False) :
-                return (name.ljust(8)[0:8], ext.ljust(3)[0:3], False)
-
-        # For filenames with multiple extensions, we treat the last one
-        # as the actual extension. The rest of the filename is stripped
-        # of dots and concatenated to form the short name
-        for _name in parts[1:-1]:
-                name = name + _name             
-
-        global name83_list
-        for number in range(1, 10000) :
-                number_str = '~' + str(number)
-
-                if len(name) + len(number_str) > 8 :
-                        name = name[0:8 - len(number_str)]
-
-                name = name + number_str;
-
-                if (name + ext) not in name83_list :
-                        break
-                        
-        name83_list.append(name + ext)  
-
-        return (name.ljust(8)[0:8], ext.ljust(3)[0:3], True)
-
-def get_utf16(name, l) :
-        "Create a int array out of a string which we can store in uint16_t arrays"
-
-        bs = [0xFFFF for i in range(l)]
-
-        for i in range(len(name)) :
-                bs[i] = ord(name[i])
-        
-        if (len(name) < l) :
-                bs[len(name)] = 0;
-        
-        return bs
-
-def create_lfn_entry((name, index)) :
-        entry = xstruct.create(LFN_ENTRY)
-
-        entry.name1 = get_utf16(name[0:5], 5)
-        entry.name2 = get_utf16(name[5:11], 6)
-        entry.name3 = get_utf16(name[11:13], 2)
-        entry.pos = index
-
-        entry.attr = 0xF
-        entry.fc = 0
-        entry.type = 0
-
-        return entry
+                fname = parts[0]
+        else:
+                fname = ''
+        
+        if len(fname) > 8:
+                sys.stdout.write("mkfat.py: error: Directory entry " + name +
+                    " base name is longer than 8 characters\n")
+                sys.exit(1);
+        
+        return (fname + '          ').upper()[0:8]
+
+def mangle_ext(name):
+        # FIXME: filter illegal characters
+        parts = name.split('.')
+        
+        if len(parts) > 1:
+                ext = parts[1]
+        else:
+                ext = ''
+        
+        if len(parts) > 2:
+                sys.stdout.write("mkfat.py: error: Directory entry " + name +
+                    " has more than one extension\n")
+                sys.exit(1);
+        
+        if len(ext) > 3:
+                sys.stdout.write("mkfat.py: error: Directory entry " + name +
+                    " extension is longer than 3 characters\n")
+                sys.exit(1);
+        
+        return (ext + '   ').upper()[0:3]
 
 def create_dirent(name, directory, cluster, size):
-        
         dir_entry = xstruct.create(DIR_ENTRY)
         
-        dir_entry.name, dir_entry.ext, lfn = name83(name)
-
-        dir_entry.name = dir_entry.name.upper().encode('ascii')
-        dir_entry.ext = dir_entry.ext.upper().encode('ascii')
-
+        dir_entry.name = mangle_fname(name).encode('ascii')
+        dir_entry.ext = mangle_ext(name).encode('ascii')
+        
         if (directory):
                 dir_entry.attr = 0x30
@@ -289 +230 @@
                 dir_entry.size = size
         
-
-        if not lfn:
-                return [dir_entry]
-
-        n = len(name) / 13 + 1
-        names = [(name[i * 13: (i + 1) * 13 + 1], i + 1) for i in range(n)]
-
-        entries = sorted(map (create_lfn_entry, names), reverse = True, key = lambda e : e.pos)
-        entries[0].pos |= 0x40
-
-        fname11 = dir_entry.name + dir_entry.ext
-
-        csum = 0
-        for i in range(0, 11) :
-                csum = ((csum & 1) << 7) + (csum  >> 1) + ord(fname11[i])
-                csum = csum & 0xFF
-        
-        for e in entries :
-                e.csum = csum;
-        
-        entries.append(dir_entry)
-
-        return entries
+        return dir_entry
 
 def create_dot_dirent(empty_cluster):
@@ -369 +288 @@
                 if item.is_file:
                         rv = write_file(item, outf, cluster_size, data_start, fat, reserved_clusters)
-                        directory.extend(create_dirent(item.name, False, rv[0], rv[1]))
+                        directory.append(create_dirent(item.name, False, rv[0], rv[1]))
                 elif item.is_dir:
                         rv = recursion(False, item.path, outf, cluster_size, root_start, data_start, fat, reserved_clusters, dirent_size, empty_cluster)
-                        directory.extend(create_dirent(item.name, True, rv[0], rv[1]))
+                        directory.append(create_dirent(item.name, True, rv[0], rv[1]))
         
         if (head):