Update magic header info.

Move offset check to after reading chunk width.
Realloc instead of free and malloc.

doc/magic.header.txt

@@ -1,3 +1,29 @@
+lrzip-0.50+ file header format
+November 2010
+Con Kolivas
+
+Byte	Content
+0-3	LRZI
+4	LRZIP Major Version Number
+5	LRZIP Minor Version Number
+6-14	Source File Size
+16-20	LZMA Properties Encoded (lc,lp,pb,fb, and dictionary size)
+21-22	not used
+23-48	Stream 1 header data
+49-74	Stream 2 header data
+
+Block Data:
+Byte:
+0	Compressed data type
+1-8	Compressed data length
+9-16	Uncompressed data length
+17-24	Next block head
+25	Data offsets byte width
+26+	Data
+
+End:
+0-1	crc data
+
 lrzip-0.40+ file header format
 November 2009
 Con Kolivas

runzip.c

@@ -159,13 +159,6 @@ static i64 runzip_chunk(int fd_in, int fd_out, int fd_hist, i64 expected_size, i
 
 	prog_tsize = (long double)expected_size / (long double)divisor[divisor_index];
 
-	ofs = lseek(fd_in, 0, SEEK_CUR);
-	if (ofs == -1)
-		fatal("Failed to seek input file in runzip_fd\n");
-
-	if (fstat(fd_in, &st) != 0 || st.st_size-ofs == 0)
-		return 0;
-
 	/* Determine the chunk_byte width size. Versions < 0.4 used 4
 	 * bytes for all offsets, version 0.4 used 8 bytes. Versions 0.5+ use
 	 * a variable number of bytes depending on chunk size.*/
@@ -178,7 +171,16 @@ static i64 runzip_chunk(int fd_in, int fd_out, int fd_hist, i64 expected_size, i
 		if (read(fd_in, &chunk_bytes, 1) != 1)
 			fatal("Failed to read chunk_bytes size in runzip_chunk\n");
 	}
-	print_maxverbose("\nExpected size: %lld\nChunk byte width: %d\n", expected_size, chunk_bytes);
+	if (!tally)
+		print_maxverbose("\nExpected size: %lld", expected_size);
+	print_maxverbose("\nChunk byte width: %d\n", chunk_bytes);
+
+	ofs = lseek(fd_in, 0, SEEK_CUR);
+	if (ofs == -1)
+		fatal("Failed to seek input file in runzip_fd\n");
+
+	if (fstat(fd_in, &st) != 0 || st.st_size-ofs == 0)
+		return 0;
 
 	ss = open_stream_in(fd_in, NUM_STREAMS);
 	if (!ss)

rzip.c

@@ -629,7 +629,7 @@ void rzip_fd(int fd_in, int fd_out)
 			chunk = len;
 		limit = chunk;
 		st->chunk_size = chunk;
-		print_maxverbose("Chunk size: %lld\n\n", chunk);
+		print_maxverbose("Chunk size: %lld\n", chunk);
 
 		/* Determine the chunk byte width and write it to the file
 		 * This allows archives of different chunk sizes to have

stream.c

@@ -796,10 +796,9 @@ static int flush_buffer(struct stream_info *sinfo, int stream)
 
 	sinfo->s[stream].buflen = 0;
 
-	free(sinfo->s[stream].buf);
-	sinfo->s[stream].buf = malloc(sinfo->bufsize);
+	sinfo->s[stream].buf = realloc(sinfo->s[stream].buf, sinfo->bufsize);
 	if (!sinfo->s[stream].buf)
-		fatal("Failed to malloc in flush_buffer\n");
+		fatal("Failed to realloc in flush_buffer\n");
 	return 0;
 }