[iso] add udf_setpos() support in libcdio

* This is needed for wimlib libcdio integration.
* Also fix a signed/unsigned warning in iso.c.

src/iso.c

@@ -1496,7 +1496,7 @@ int64_t ExtractISOFile(const char* iso, const char* iso_file, const char* dest_f
 			uprintf("Error reading UDF file %s", iso_file);
 			goto out;
 		}
-		buf_size = (DWORD)MIN(file_length, read_size);
+		buf_size = (DWORD)MIN(file_length, (int64_t)read_size);
 		if (!WriteFileWithRetry(file_handle, buf, buf_size, &wr_size, WRITE_RETRIES)) {
 			uprintf("  Error writing file %s: %s", dest_file, WindowsErrorString());
 			goto out;

src/libcdio/cdio/udf.h

@@ -190,6 +190,8 @@ extern "C" {
     bool udf_get_lba(const udf_file_entry_t *p_udf_fe, 
                      /*out*/ uint32_t *start, /*out*/ uint32_t *end);
 
+    bool udf_setpos(udf_dirent_t* p_udf_dirent, off_t offset);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */

src/libcdio/udf/udf_fs.c

@@ -770,3 +770,17 @@ udf_dirent_free(udf_dirent_t *p_udf_dirent)
   }
   return true;
 }
+
+/*!
+  Seek to a specific offset in a UDF file. Must be a multiple of UDF_BLOCKSIZE.
+*/
+bool
+udf_setpos(udf_dirent_t* p_udf_dirent, off_t offset)
+{
+    if (!p_udf_dirent)
+	return false;
+    if (offset % UDF_BLOCKSIZE || offset > uint64_from_le(p_udf_dirent->fe.info_len))
+	return false;
+    p_udf_dirent->p_udf->i_position = offset;
+    return true;
+}

src/rufus.rc

@@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 232, 326
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_ACCEPTFILES
-CAPTION "Rufus 4.8.2236"
+CAPTION "Rufus 4.8.2237"
 FONT 9, "Segoe UI Symbol", 400, 0, 0x0
 BEGIN
     LTEXT           "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@@ -407,8 +407,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,8,2236,0
- PRODUCTVERSION 4,8,2236,0
+ FILEVERSION 4,8,2237,0
+ PRODUCTVERSION 4,8,2237,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -426,13 +426,13 @@ BEGIN
             VALUE "Comments", "https://rufus.ie"
             VALUE "CompanyName", "Akeo Consulting"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "4.8.2236"
+            VALUE "FileVersion", "4.8.2237"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2025 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
             VALUE "OriginalFilename", "rufus-4.8.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "4.8.2236"
+            VALUE "ProductVersion", "4.8.2237"
         END
     END
     BLOCK "VarFileInfo"