Don't use deprecated libarchive functions, if possible

pixz.h

@@ -30,6 +30,17 @@
 #endif
 
 
+#pragma mark LIBARCHIVE CHANGES
+
+#include <archive.h>
+#if ARCHIVE_VERSION_NUMBER >= 3000000
+	#define prevent_compression(a) archive_read_support_filter_none(a)
+	#define finish_reading(a) archive_read_free(a)
+#else
+	#define prevent_compression(a) archive_read_support_compression_none(a)
+	#define finish_reading(a) archive_read_finish(a)
+#endif
+
 #pragma mark OPERATIONS
 
 void pixz_list(bool tar);

read.c

@@ -115,7 +115,7 @@ void pixz_read(bool verify, size_t nspecs, char **specs) {
         off_t lastoff = 0;
         
         struct archive *ar = archive_read_new();
-        archive_read_support_compression_none(ar);
+        prevent_compression(ar);
         archive_read_support_format_tar(ar);
         archive_read_open(ar, NULL, tar_ok, tar_read, tar_ok);
         struct archive_entry *entry;
@@ -150,7 +150,7 @@ void pixz_read(bool verify, size_t nspecs, char **specs) {
             wlast = w;
             w = w->next;
         }
-		archive_read_finish(ar);
+		finish_reading(ar);
         if (w && w->name)
             die("File %s missing in archive", w->name);
         tar_write_last(); // write whatever's left
@@ -669,12 +669,12 @@ static ssize_t tar_read(struct archive *ar, void *ref, const void **bufp) {
 
 static bool taste_tar(io_block_t *ib) {
     struct archive *ar = archive_read_new();
-    archive_read_support_compression_none(ar);
+    prevent_compression(ar);
     archive_read_support_format_tar(ar);
     archive_read_open_memory(ar, ib->output, ib->outsize);
     struct archive_entry *entry;
     bool ok = (archive_read_next_header(ar, &entry) == ARCHIVE_OK);
-	archive_read_finish(ar);
+	finish_reading(ar);
 	return ok;
 }
 

write.c

@@ -135,7 +135,7 @@ static void read_thread() {
     
     if (gTar) {
 		struct archive *ar = archive_read_new();
-	    archive_read_support_compression_none(ar);
+	    prevent_compression(ar);
 	    archive_read_support_format_tar(ar);
 	    archive_read_support_format_raw(ar);
 	    archive_read_open(ar, NULL, tar_ok, tar_read, tar_ok);
@@ -159,7 +159,7 @@ static void read_thread() {
 	    }
 		if (archive_read_header_position(ar) == 0)
 			gTar = false; // probably spuriously identified as tar
-    	archive_read_finish(ar);
+    	finish_reading(ar);
 	}
 	if (!feof(gInFile)) {
 		const void *dummy;