Initial import of libarchive.

What it is:
   A library for reading and writing various streaming archive
   formats, especially tar and cpio.  Being a library, it should
   be easy to incorporate into pkg_* tools, sysinstall, and any
   other place that needs to read or write such archives.

Features:
  * Full automatic detection of both compression and archive format.
  * Extensible internal architecture to make it easy to add new formats.
  * Support for "pax interchange format," a new POSIX-standard tar format
    that eliminates essentially all of the restrictions of historic formats.
  * BSD license

Thanks to: jkh for pushing me to start this work, gordon for
  encouraging me to commit it, bde for answering endless style
  questions, and many others for feedback and encouragement.

Status: Pretty good overall, though there are still a few rough edges and
  the library could always use more testing.  Feedback eagerly solicited.

1 files changed, 210 insertions, 0 deletions

diff --git a/lib/libarchive/archive_write_set_compression_none.c b/lib/libarchive/archive_write_set_compression_none.c
new file mode 100644
index 0000000..b0ed24c
--- /dev/null
+++ b/lib/libarchive/archive_write_set_compression_none.c
@@ -0,0 +1,210 @@
+/*-
+ * Copyright (c) 2003-2004 Tim Kientzle
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer
+ *    in this position and unchanged.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#ifdef DMALLOC
+#include <dmalloc.h>
+#endif
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "archive.h"
+#include "archive_private.h"
+
+static int	archive_compressor_none_finish(struct archive *a);
+static int	archive_compressor_none_init(struct archive *);
+static ssize_t	archive_compressor_none_write(struct archive *, const void *,
+		    size_t);
+
+struct archive_none {
+	char	*buffer;
+	ssize_t	 buffer_size;
+	char	*next;		/* Current insert location */
+	ssize_t	 avail;		/* Free space left in buffer */
+};
+
+int
+archive_write_set_compression_none(struct archive *a)
+{
+	archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_NEW);
+	a->compression_init = &archive_compressor_none_init;
+	a->compression_code = ARCHIVE_COMPRESSION_NONE;
+	a->compression_name = "none";
+	return (0);
+}
+
+/*
+ * Setup callback.
+ */
+static int
+archive_compressor_none_init(struct archive *a)
+{
+	int ret;
+	struct archive_none *state;
+
+	a->compression_code = ARCHIVE_COMPRESSION_NONE;
+	a->compression_name = "none";
+
+	if (a->client_opener != NULL) {
+		ret = (a->client_opener)(a, a->client_data);
+		if (ret != 0)
+			return (ret);
+	}
+
+	state = (struct archive_none *)malloc(sizeof(*state));
+	if (state == NULL) {
+		archive_set_error(a, ENOMEM,
+		    "Can't allocate data for output buffering");
+		return (ARCHIVE_FATAL);
+	}
+	memset(state, 0, sizeof(*state));
+
+	state->buffer_size = a->bytes_per_block;
+	state->buffer = malloc(state->buffer_size);
+
+	if (state->buffer == NULL) {
+		archive_set_error(a, ENOMEM,
+		    "Can't allocate output buffer");
+		free(state);
+		return (ARCHIVE_FATAL);
+	}
+
+	state->next = state->buffer;
+	state->avail = state->buffer_size;
+
+	a->compression_data = state;
+	a->compression_write = archive_compressor_none_write;
+	a->compression_finish = archive_compressor_none_finish;
+	return (ARCHIVE_OK);
+}
+
+/*
+ * Write data to the stream.
+ */
+static ssize_t
+archive_compressor_none_write(struct archive *a, const void *vbuff,
+    size_t length)
+{
+	const char *buff;
+	ssize_t remaining, to_copy;
+	int ret;
+	struct archive_none *state;
+
+	state = a->compression_data;
+	buff = vbuff;
+	if (a->client_writer == NULL) {
+		archive_set_error(a, EDOOFUS,
+		    "No write callback is registered?  "
+		    "This is probably an internal programming error.");
+		return (ARCHIVE_FATAL);
+	}
+
+	remaining = length;
+	while (remaining > 0) {
+		/*
+		 * If we have a full output block, write it and reset the
+		 * output buffer.
+		 */
+		if (state->avail == 0) {
+			ret = (a->client_writer)(a, a->client_data,
+			    state->buffer, state->buffer_size);
+			/* TODO: if ret < state->buffer_size */
+			state->next = state->buffer;
+			state->avail = state->buffer_size;
+		}
+
+		/* Now we have space in the buffer; copy new data into it. */
+		to_copy = (remaining > state->avail) ?
+		    state->avail : remaining;
+		memcpy(state->next, buff, to_copy);
+		state->next += to_copy;
+		state->avail -= to_copy;
+		buff += to_copy;
+		remaining -= to_copy;
+	}
+	return (length);
+}
+
+
+/*
+ * Finish the compression.
+ */
+static int
+archive_compressor_none_finish(struct archive *a)
+{
+	ssize_t block_length;
+	ssize_t target_block_length;
+	int ret;
+	int ret2;
+	struct archive_none *state;
+
+	state = a->compression_data;
+	ret = ret2 = ARCHIVE_OK;
+	if (a->client_writer == NULL) {
+		archive_set_error(a, EDOOFUS,
+		    "No write callback is registered?  "
+		    "This is probably an internal programming error.");
+		return (ARCHIVE_FATAL);
+	}
+
+	/* If there's pending data, pad and write the last block */
+	if (state->next != state->buffer) {
+		block_length = state->buffer_size - state->avail;
+
+		/* Tricky calculation to determine size of last block */
+		target_block_length = block_length;
+		if (a->bytes_in_last_block <= 0)
+			/* Default or Zero: pad to full block */
+			target_block_length = a->bytes_per_block;
+		else
+			/* Round to next multiple of bytes_in_last_block. */
+			target_block_length = a->bytes_in_last_block *
+			    ( (block_length + a->bytes_in_last_block - 1) /
+				a->bytes_in_last_block);
+		if (target_block_length > a->bytes_per_block)
+			target_block_length = a->bytes_per_block;
+		if (block_length < target_block_length) {
+			memset(state->next, 0,
+			    target_block_length - block_length);
+			block_length = target_block_length;
+		}
+		ret = (a->client_writer)(a, a->client_data, state->buffer,
+		    block_length);
+	}
+
+	/* Close the output */
+	if (a->client_closer != NULL)
+		ret2 = (a->client_closer)(a, a->client_data);
+
+	free(state->buffer);
+	free(state);
+	a->compression_data = NULL;
+
+	return (ret != ARCHIVE_OK ? ret : ret2);
+}