update checking for DB types to support lmdb and kyotocabinet checks properly

Author: l8gravely

src/libduc/db.c

@@ -117,8 +117,9 @@ char *duc_db_type_check(const char *path_db)
 	/* read first MAGIC_LEN bytes of file then look for the strings, etc for each type of DB we support. */
 	size_t len = fread(buf, 1, sizeof(buf),f);
 
-	if (strncmp(buf,"Kyoto CaBiNeT",13) == 0) {
-	    return("kyotocabinet");
+	char kyotocabinet[] = { 0x4b,0x43,0x0a,0x0,0x10,0x0e,0x06,0xb4,0x31,0x08,0x0a,0x04,0x00,0x00,0x00,0x00 };
+	if (memcmp(buf,kyotocabinet,16) == 0) {
+	    return("kyotocabinet(hex)");
 	}
 
 	if (strncmp(buf,"ToKyO CaBiNeT",13) == 0) {
@@ -133,7 +134,9 @@ char *duc_db_type_check(const char *path_db)
 	    return("sqlite3");
 	}
 
-	if (strncmp(buf,"SQLite format 3",15) == 0) {
+	char lmdb[] = { 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x08,0x0,0x0,0x0,0x0,0x0,
+                        0xde,0xc0,0xef,0xbe,0x01,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0 };
+	if (memcmp(buf,lmdb,32) == 0) {
 	    return("lmdb");
 	}