X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Fxpress-compress.c;h=ec63eb18a8206b06d39dbdf032a1080809f962bb;hb=5218b1d7c83cf9e98ed6276e099844ae0d80abc2;hp=68d2890656040be259f57f5b5bc69beaf354b52b;hpb=92d96f9e2db42196a778b727cfa91d18a5cc6f49;p=wimlib

diff --git a/src/xpress-compress.c b/src/xpress-compress.c
index 68d28906..ec63eb18 100644
--- a/src/xpress-compress.c
+++ b/src/xpress-compress.c
@@ -146,7 +146,6 @@ WIMLIBAPI unsigned
 wimlib_xpress_compress(const void *__uncompressed_data,
 		       unsigned uncompressed_len, void *__compressed_data)
 {
-	const u8 *uncompressed_data = __uncompressed_data;
 	u8 *compressed_data = __compressed_data;
 	struct output_bitstream ostream;
 	u32 match_tab[uncompressed_len];
@@ -157,6 +156,10 @@ wimlib_xpress_compress(const void *__uncompressed_data,
 	unsigned compressed_len;
 	unsigned i;
 	int ret;
+	u8 uncompressed_data[uncompressed_len + 8];
+
+	memcpy(uncompressed_data, __uncompressed_data, uncompressed_len);
+	memset(uncompressed_data + uncompressed_len, 0, 8);
 
 	wimlib_assert(uncompressed_len <= 32768);
 
@@ -236,23 +239,25 @@ wimlib_xpress_compress(const void *__uncompressed_data,
 
 	wimlib_assert(compressed_len <= uncompressed_len - 1);
 
-#ifdef ENABLE_VERIFY_COMPRESSION
+#if defined(ENABLE_VERIFY_COMPRESSION)
 	/* Verify that we really get the same thing back when decompressing. */
-	u8 buf[uncompressed_len];
-	ret = wimlib_xpress_decompress(__compressed_data, compressed_len,
-				       buf, uncompressed_len);
-	if (ret) {
-		ERROR("xpress_compress(): Failed to decompress data we "
-		      "compressed");
-		abort();
-	}
-	for (i = 0; i < uncompressed_len; i++) {
-		if (buf[i] != uncompressed_data[i]) {
-			ERROR("xpress_compress(): Data we compressed didn't "
-			      "decompress to the original data (difference at "
-			      "byte %u of %u)", i + 1, uncompressed_len);
+	{
+		u8 buf[uncompressed_len];
+		ret = wimlib_xpress_decompress(__compressed_data, compressed_len,
+					       buf, uncompressed_len);
+		if (ret) {
+			ERROR("xpress_compress(): Failed to decompress data we "
+			      "compressed");
 			abort();
 		}
+		for (i = 0; i < uncompressed_len; i++) {
+			if (buf[i] != uncompressed_data[i]) {
+				ERROR("xpress_compress(): Data we compressed didn't "
+				      "decompress to the original data (difference at "
+				      "byte %u of %u)", i + 1, uncompressed_len);
+				abort();
+			}
+		}
 	}
 #endif
 	return compressed_len;