This is a patch to apply on the ucl-1.03 tarball to get the modified
uclpack for Rockbox (see http://www.rockbox.org/twiki/bin/view/Main/RomBox)
Get the original tarball here:
http://www.oberhumer.com/opensource/ucl/download/
--- ucl-1.03/examples/uclpack.c.orig	2004-07-20 01:01:47.000000000 +0200
+++ ucl-1.03/examples/uclpack.c	2004-12-09 18:18:11.043974400 +0100
@@ -184,9 +184,11 @@
 static ucl_bool set_method_name(int method, int level)
 {
     method_name[0] = 0;
-    if (level < 1 || level > 10)
+    if (level < 0 || level > 10)
         return 0;
-    if (method == 0x2b)
+    if (method == 0)
+        sprintf(method_name,"uncompressed/%d", level);
+    else if (method == 0x2b)
         sprintf(method_name,"NRV2B-99/%d", level);
     else if (method == 0x2d)
         sprintf(method_name,"NRV2D-99/%d", level);
@@ -262,7 +264,12 @@
         /* compress block */
         r = UCL_E_ERROR;
         out_len = 0;
-        if (method == 0x2b)
+        if (level == 0)
+        {
+            out_len = in_len; /* uncompressed */
+            r = UCL_E_OK;
+        }
+        else if (method == 0x2b)
             r = ucl_nrv2b_99_compress(in,in_len,out,&out_len,0,level,NULL,NULL);
         else if (method == 0x2d)
             r = ucl_nrv2d_99_compress(in,in_len,out,&out_len,0,level,NULL,NULL);
@@ -562,7 +569,8 @@
     printf("  %s -t -D1000 compressed-file...          (test decompression speed)\n", progname);
 #endif
     printf("\ncompression options:\n");
-    printf("  -1...-9, --10   set compression level [default is `-7']\n");
+    printf("  -0...-9, --10   set compression level [default is `-7']\n");
+    printf("  --none          uncompressed method\n");
     printf("  --nrv2b         use NRV2B compression method\n");
     printf("  --nrv2d         use NRV2D compression method [default]\n");
     printf("  --nrv2e         use NRV2E compression method\n");
@@ -720,12 +728,14 @@
             opt_method = 0x2e;
         else if (strcmp(argv[i],"--nrv2e") == 0)
             opt_method = 0x2e;
-        else if ((argv[i][1] >= '1' && argv[i][1] <= '9') && !argv[i][2])
+        else if ((argv[i][1] >= '0' && argv[i][1] <= '9') && !argv[i][2])
             opt_level = argv[i][1] - '0';
         else if (strcmp(argv[i],"--10") == 0)
             opt_level = 10;
         else if (strcmp(argv[i],"--best") == 0)
             opt_level = 10;
+        else if (strcmp(argv[i],"--none") == 0)
+            opt_level = 0;
         else if (argv[i][1] == 'b' && argv[i][2])
         {
             long x = atol(&argv[i][2]);