refactor: More flexible field copying macro

Author: abelcheung

src/rifiuti-vista.c

@@ -62,7 +62,7 @@ _validate_index_file   (const char   *filename,
         goto validate_fail;
     }
 
-    copy_field (ver, VERSION_OFFSET, FILESIZE_OFFSET);
+    copy_field (*ver, buf, VERSION_OFFSET, FILESIZE_OFFSET);
     *ver = GUINT64_FROM_LE (*ver);
     g_debug ("version = %" PRIu64, *ver);
 
@@ -86,7 +86,7 @@ _validate_index_file   (const char   *filename,
 
             // Version 2 adds a uint32 file name strlen before file name.
             // This presumably breaks the 260 char barrier in version 1.
-            copy_field (&pathlen, VERSION1_FILENAME_OFFSET, VERSION2_FILENAME_OFFSET);
+            copy_field (pathlen, buf, VERSION1_FILENAME_OFFSET, VERSION2_FILENAME_OFFSET);
             pathlen = GUINT32_FROM_LE (pathlen);
 
             /* Header length + strlen in UTF-16 encoding */
@@ -163,8 +163,8 @@ _populate_record_data  (void      *buf,
     record = g_malloc0 (sizeof (rbin_struct));
     record->version = version;
 
-    memcpy (&record->filesize, buf + FILESIZE_OFFSET,
-            FILETIME_OFFSET - FILESIZE_OFFSET - (int) erraneous);
+    copy_field (record->filesize, buf, FILESIZE_OFFSET,
+        FILETIME_OFFSET - (int) erraneous);
     if (erraneous)
     {
         g_debug ("filesize field broken, 56 bit only, val=0x%" PRIX64,
@@ -179,8 +179,8 @@ _populate_record_data  (void      *buf,
     }
 
     /* File deletion time */
-    memcpy (&record->winfiletime, buf - (int) erraneous + FILETIME_OFFSET,
-            VERSION1_FILENAME_OFFSET - FILETIME_OFFSET);
+    copy_field (record->winfiletime, buf - (int) erraneous,
+        FILETIME_OFFSET, VERSION1_FILENAME_OFFSET);
     record->winfiletime = GINT64_FROM_LE (record->winfiletime);
     record->deltime = win_filetime_to_gdatetime (record->winfiletime);
 

src/rifiuti.c

@@ -66,17 +66,17 @@ _validate_index_file   (const char   *filename,
         goto validation_fail;
     }
 
-    copy_field (&ver, VERSION_OFFSET, KEPT_ENTRY_OFFSET);
+    copy_field (ver, buf, VERSION_OFFSET, KEPT_ENTRY_OFFSET);
     ver = GUINT32_FROM_LE (ver);
 
     // total_entry only meaningful for 95 and NT4, on other versions
     // it's junk memory data, don't bother copying
     if ( ( ver == VERSION_NT4 ) || ( ver == VERSION_WIN95 ) ) {
-        copy_field (&meta->total_entry, TOTAL_ENTRY_OFFSET, RECORD_SIZE_OFFSET);
+        copy_field (meta->total_entry, buf, TOTAL_ENTRY_OFFSET, RECORD_SIZE_OFFSET);
         meta->total_entry = GUINT32_FROM_LE (meta->total_entry);
     }
 
-    copy_field (&meta->recordsize, RECORD_SIZE_OFFSET, FILESIZE_SUM_OFFSET);
+    copy_field (meta->recordsize, buf, RECORD_SIZE_OFFSET, FILESIZE_SUM_OFFSET);
     meta->recordsize = GUINT32_FROM_LE (meta->recordsize);
 
     g_free (buf);
@@ -150,15 +150,16 @@ _populate_record_data   (void     *buf,
 
     // Verbatim path in ANSI code page
     record->raw_legacy_path = g_malloc0 (RECORD_INDEX_OFFSET - LEGACY_FILENAME_OFFSET);
-    copy_field (record->raw_legacy_path, LEGACY_FILENAME_OFFSET, RECORD_INDEX_OFFSET);
+    copy_field (*(record->raw_legacy_path), buf,
+        LEGACY_FILENAME_OFFSET, RECORD_INDEX_OFFSET);
 
     /* Index number associated with the record */
-    copy_field (&record->index_n, RECORD_INDEX_OFFSET, DRIVE_LETTER_OFFSET);
+    copy_field (record->index_n, buf, RECORD_INDEX_OFFSET, DRIVE_LETTER_OFFSET);
     record->index_n = GUINT32_FROM_LE (record->index_n);
     g_debug ("index=%u", record->index_n);
 
     /* Number representing drive letter, 'A:' = 0, etc */
-    copy_field (&drivenum, DRIVE_LETTER_OFFSET, FILETIME_OFFSET);
+    copy_field (drivenum, buf, DRIVE_LETTER_OFFSET, FILETIME_OFFSET);
     drivenum = GUINT32_FROM_LE (drivenum);
     g_debug ("drive=%u", drivenum);
     if (drivenum >= sizeof (driveletters) - 1) {
@@ -179,13 +180,14 @@ _populate_record_data   (void     *buf,
     }
 
     /* File deletion time */
-    copy_field (&record->winfiletime, FILETIME_OFFSET, FILESIZE_OFFSET);
+    copy_field (record->winfiletime, buf, FILETIME_OFFSET, FILESIZE_OFFSET);
     record->winfiletime = GINT64_FROM_LE (record->winfiletime);
     record->deltime = win_filetime_to_gdatetime (record->winfiletime);
 
     /* File size or occupied cluster size */
     /* BEWARE! This is 32bit data casted to 64bit struct member */
-    copy_field (&record->filesize, FILESIZE_OFFSET, UNICODE_FILENAME_OFFSET);
+    copy_field (record->filesize, buf,
+        FILESIZE_OFFSET, UNICODE_FILENAME_OFFSET);
     record->filesize = GUINT64_FROM_LE (record->filesize);
     g_debug ("filesize=%" PRIu64, record->filesize);
 
@@ -210,7 +212,8 @@ _populate_record_data   (void     *buf,
 
     uni_buf_sz = UNICODE_RECORD_SIZE - UNICODE_FILENAME_OFFSET;
     record->raw_uni_path = g_malloc (uni_buf_sz);
-    copy_field (record->raw_uni_path, UNICODE_FILENAME_OFFSET, UNICODE_RECORD_SIZE);
+    copy_field (*(record->raw_uni_path), buf,
+        UNICODE_FILENAME_OFFSET, UNICODE_RECORD_SIZE);
     null_terminator_offset = ucs2_strnlen (
         record->raw_uni_path, WIN_PATH_MAX) * sizeof (gunichar2);
 

src/utils.h

@@ -212,8 +212,8 @@ typedef struct _rbin_struct
 } rbin_struct;
 
 /* convenience macro */
-#define copy_field(field, off1, off2) \
-    memcpy((field), buf + (off1), (off2) - (off1))
+#define copy_field(field, buf, off1, off2) \
+    memcpy(&(field), (buf) + (off1), (off2) - (off1))
 
 /*! Every Windows use this GUID in recycle bin desktop.ini */
 #define RECYCLE_BIN_CLSID "645FF040-5081-101B-9F08-00AA002F954E"