unyar: account for end-of-file padding

Allows decompressing yaz archives that contain padding or other stale data at the end, by attempting to decompress only as many files as described by the header.

Author: z64me

src/yar.c

@@ -104,6 +104,7 @@ yar_reencode(
 	struct yarFile *list = 0;
 	struct yarFile *item;
 	int list_num;
+	int cur_index = 1; /* accounts for padding the end of the file */
 
 	assert(src);
 	assert(sz);
@@ -234,8 +235,9 @@ yar_reencode(
 
 		ss += 4;
 		item += 1;
+		cur_index += 1;
 
-	} while ((unsigned)(ss - src) < end);
+	} while ((unsigned)(ss - src) < end && cur_index < list_num - 1);
 
 	/* update progress display */
 	if (name)

src/z64yartool.c

@@ -305,7 +305,7 @@ int main(int argc, const char *argv[])
 	const char *command = argv[1];
 	const char *input = argv[2];
 
-	fprintf(stderr, "welcome to z64yartool v1.0.0 <z64.me> special thanks Javarooster\n");
+	fprintf(stderr, "welcome to z64yartool v1.0.1 <z64.me> special thanks Javarooster\n");
 	fprintf(stderr, "build date: %s at %s\n", __DATE__, __TIME__);
 
 	if ((!command || strcmp(command, "unyar")) && argc != 3)